CN106766448A - Control method and device for heat recovery liquid return and unit with device - Google Patents
Control method and device for heat recovery liquid return and unit with device Download PDFInfo
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- CN106766448A CN106766448A CN201611111216.0A CN201611111216A CN106766448A CN 106766448 A CN106766448 A CN 106766448A CN 201611111216 A CN201611111216 A CN 201611111216A CN 106766448 A CN106766448 A CN 106766448A
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- recuperation
- heat
- pressure
- hydrops
- magnetic valve
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- 239000007788 liquid Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000011084 recovery Methods 0.000 title abstract description 14
- 239000003507 refrigerant Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 241000521257 Hydrops Species 0.000 claims description 77
- 206010030113 Oedema Diseases 0.000 claims description 77
- 238000012360 testing method Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000006870 function Effects 0.000 description 5
- 238000010977 unit operation Methods 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 241000208340 Araliaceae Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method and a control device for heat recovery liquid return and a unit with the device. The control method of the heat recovery liquid comprises the following steps: the method comprises the following steps of detecting a pressure value at the low-pressure side of the compressor and an end temperature difference, wherein the end temperature difference is the temperature difference between the outlet temperature of a heat recovery refrigerant and the outlet temperature of heat recovery outlet water; judging, namely judging the accumulated liquid amount of the heat recovery shell tube according to the detected pressure value and the end temperature difference of the low pressure side of the compressor; and an adjusting step, namely adjusting the flow of the return liquid of the bypass pipe of the heat recovery shell pipe to shunt the accumulated liquid of the heat recovery shell pipe according to the judgment result of the accumulated liquid amount of the heat recovery shell pipe. According to the technical scheme, the liquid return capacity of the heat recovery shell tube is enhanced by adjusting the flow of the liquid return of the bypass tube of the heat recovery shell tube, the reduction of the low-pressure side pressure is effectively controlled, and the phenomena of shutdown and unstable operation of the whole machine caused by low-pressure protection are avoided.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly to a kind of recuperation of heat returns the control method of liquid, device and with this
The unit of device.
Background technology
Air-conditioning system in use, the condensed device liberated heat of unit be generally cooled tower or cooling blower arrange to
In surrounding environment, place such as hotel, factory, hospital etc. to needs heat are a kind of huge wastes, while giving surrounding environment
Also certain used heat is brought to pollute.Heat recovery technology is exactly that will be arranged outwardly in handpiece Water Chilling Units running by certain mode
A large amount of Waste Heat Recoveries recycle, as the final thermal source or primary heat source of user.But the wind-cooled cold-water with heat recovery function
Unit, under the specific operations such as recuperation of heat heat exchange amount increase, it may appear that refrigerant is accumulated in recuperation of heat package, liquid occurs back not
Good, unit lacks the state of liquid, so as to cause low-pressure lateral pressure to decline, low-voltage variation, the phenomenon of whole machine fluctuation of service occurs.
The content of the invention
In view of this, the invention provides the control method that liquid is returned in a kind of recuperation of heat, including：Detecting step, for detecting
Compressor low-pressure lateral pressure value and the end temperature difference, the end temperature difference is the temperature of recuperation of heat outlet refrigerant temperature and recuperation of heat leaving water temperature
Degree is poor；Determination step, compressor low-pressure lateral pressure value and the end temperature difference for being detected according to judge recuperation of heat package
Hydrops amount；Set-up procedure, for the result of determination of the hydrops amount according to the recuperation of heat package, by adjusting recuperation of heat package
The hydrops of recuperation of heat package described in the flow shunt of bypass pipe time liquid.
Alternatively, the bypass pipe of the adjustment recuperation of heat package returns the flow of liquid, including：By the recuperation of heat package and extremely
A few bypass pipe with magnetic valve is in parallel, total magnetic valve is set on the main line of the bypass pipe in parallel, by control
The bypass pipe that total magnetic valve on the magnetic valve of each bypass pipe and the main line adjusts the recuperation of heat package returns liquid
Flow.
Alternatively, the determination step also includes：If the compressor low-pressure lateral pressure value for detecting is more than or equal to pre-
If first pressure threshold value, or the end temperature difference for detecting be more than or equal to default temperature threshold, then judge recuperation of heat package
Without hydrops；If the compressor low-pressure lateral pressure value for detecting is more than or equal to default second pressure threshold value and less than default
First pressure threshold value, or the end temperature difference for detecting is less than default temperature threshold, then judge that recuperation of heat package has a small amount of product
Liquid；If the compressor low-pressure lateral pressure value for detecting is more than or equal to default 3rd pressure threshold and less than default second
Pressure threshold, or the end temperature difference for detecting is less than default temperature threshold, then judge that recuperation of heat package has volume hydrops, institute
The 3rd pressure threshold is stated for low pressure protection value.
Alternatively, the set-up procedure also includes：If the result of determination of the hydrops amount of the recuperation of heat package is recuperation of heat
Package without hydrops, then by total closed electromagnetic valve；If the result of determination of the hydrops amount of the recuperation of heat package is recuperation of heat shell
Pipe has a small amount of hydrops, then open total magnetic valve, and the n magnetic valve of the bypass pipe is opened, and wherein n is default few
The opening number of magnetic valve during amount hydrops；If the result of determination of the hydrops amount of the recuperation of heat package has volume for recuperation of heat package
Hydrops, then open total magnetic valve, and the magnetic valve of all of bypass pipe is fully open.
Alternatively, also include：If the compressor low-pressure lateral pressure value for detecting is less than low pressure protection value, and institute
The magnetic valve and total magnetic valve of the bypass pipe having are completely in open mode, then control unit to enter low-voltage variation and shut down shape
State.
Another aspect of the present invention provides the control device that liquid is returned in a kind of recuperation of heat again, including：Testing equipment, including it is low
Pressure pressure sensor, for detecting compressor low-pressure lateral pressure value；The testing equipment also includes recuperation of heat refrigerant exit temperature-sensitive
Bag and recuperation of heat delivery port water temperature temperature-sensitive bag, for the test side temperature difference, the end temperature difference is recuperation of heat outlet refrigerant temperature and heat
Reclaim the temperature difference of leaving water temperature；Determination module, for the compressor low-pressure lateral pressure value and the end temperature difference that are detected according to
Judge the hydrops amount of recuperation of heat package；Adjusting module, for the result of determination of the hydrops amount according to the recuperation of heat package, passes through
The hydrops of recuperation of heat package described in the flow shunt of the bypass pipe time liquid for adjusting recuperation of heat package.
Alternatively, be arranged in parallel with the recuperation of heat package at least one with magnetic valve bypass pipe, it is described simultaneously
Total magnetic valve is provided with the main line of the bypass pipe of connection, the total magnetic valve on the magnetic valve of each bypass pipe and the main line
Bypass pipe for adjusting the recuperation of heat package returns the flow of liquid.
Alternatively, the determination module is additionally operable to：If the compressor low-pressure lateral pressure value for detecting is more than or equal to pre-
If first pressure threshold value, or the end temperature difference for detecting be more than or equal to default temperature threshold, then judge recuperation of heat package
Without hydrops；If the compressor low-pressure lateral pressure value for detecting is more than or equal to default second pressure threshold value and less than default
First pressure threshold value, or the end temperature difference for detecting is less than default temperature threshold, then judge that recuperation of heat package has a small amount of product
Liquid；If the compressor low-pressure lateral pressure value for detecting is more than or equal to default 3rd pressure threshold and less than default second
Pressure threshold, or the end temperature difference for detecting is less than default temperature threshold, then judge that recuperation of heat package has volume hydrops, institute
The 3rd pressure threshold is stated for low pressure protection value.
Alternatively, the adjusting module is additionally operable to：If the result of determination of the hydrops amount of the recuperation of heat package is recuperation of heat
Package without hydrops, then by total closed electromagnetic valve；If the result of determination of the hydrops amount of the recuperation of heat package is recuperation of heat shell
Pipe has a small amount of hydrops, then open total magnetic valve, and the n magnetic valve of the bypass pipe is opened, and wherein n is default few
The opening number of magnetic valve during amount hydrops；If the result of determination of the hydrops amount of the recuperation of heat package has volume for recuperation of heat package
Hydrops, then open total magnetic valve, and the magnetic valve of all of bypass pipe is fully open.
Alternatively, also it is used for including low-voltage variation module：If the compressor low-pressure lateral pressure value for detecting is less than low
Pressure pressure protection value, and the magnetic valve and total magnetic valve of all of bypass pipe are completely in open mode, then control unit
Into low-voltage variation stopped status.
Another aspect of the present invention provides a kind of unit again, with heat reclamation device, with described in any of the above-described
Device.
Technical scheme returns the flow of liquid by adjusting the bypass pipe of recuperation of heat package, effectively shunts recuperation of heat
The refrigerant that package accumulates, imports condenser side until evaporation side, that strengthens recuperation of heat package returns liquid energy power, reduces refrigerant by refrigerant
Heat exchange in recuperation of heat package.And then it is big by the flow of recuperation of heat package bypass liquid back pipe inflow condenser to change refrigerant
It is small, so as to adjust the size of whole machine low-pressure side coolant quantity and the size of low-pressure lateral pressure, prevent recuperation of heat hydrops and return liquid it is bad,
Unit low-pressure lateral pressure is too low, the low-voltage variation of appearance and cause shut down and unit operation unstable state, make unit high efficiency
Return liquid, greatly improve the reliability of unit operation in ground.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes a part of the invention, this hair
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the general frame figure of the control method that liquid is returned in the recuperation of heat that the present invention is provided；
Fig. 2 is the device structure schematic diagram of the control method that liquid is returned in the recuperation of heat that the present invention is provided；
The step of Fig. 3 is a kind of preferred embodiment of the control method that liquid is returned in the recuperation of heat that the present invention is provided flow chart；
Fig. 4 is the overall structure figure of the control device that liquid is returned in the recuperation of heat that the present invention is provided；
Fig. 5 is a kind of structural representation of preferred embodiment of the control device that liquid is returned in the recuperation of heat that the present invention is provided.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Corresponding accompanying drawing is clearly and completely described to technical solution of the present invention.Obviously, described embodiment is only the present invention one
Section Example, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under the premise of creative work, belong to the scope of protection of the invention.
It should be noted that term " first ", " in description and claims of this specification and above-mentioned accompanying drawing
Two " it is etc. for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so using
Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating herein or
Order beyond those of description is implemented.Additionally, term " comprising " and " having " and their any deformation, it is intended that cover
Lid is non-exclusive to be included, for example, the process, method, system, product or the equipment that contain series of steps or unit are not necessarily limited to
Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product
Or other intrinsic steps of equipment or unit.
The invention provides the control method that liquid is returned in a kind of recuperation of heat.Fig. 1 is the control that liquid is returned in the recuperation of heat that the present invention is provided
The general frame figure of method processed.As shown in figure 1, the control method that liquid is returned in recuperation of heat of the present invention includes：Step S110, detection step
Suddenly, for detecting compressor low-pressure lateral pressure value and the end temperature difference, the end temperature difference is recuperation of heat outlet refrigerant temperature and recuperation of heat
The temperature difference of leaving water temperature；Step S120, determination step, for the compressor low-pressure lateral pressure value detected according to and end
The temperature difference judges the hydrops amount of recuperation of heat package；Step S130, set-up procedure, for the hydrops amount according to the recuperation of heat package
Result of determination, the hydrops of recuperation of heat package described in the flow shunt of liquid is returned by the bypass pipe for adjusting recuperation of heat package.The present invention
Technical scheme according to low-pressure lateral pressure value size P (pressure of inspiration(Pi) force value) and end temperature difference size △ t (recuperation of heat outlet refrigerant temperatures
The temperature difference of t1 and recuperation of heat leaving water temperature t2), judge whether low-pressure lateral pressure relatively low, recuperation of heat package whether hydrops, and and
When adjustment recuperation of heat bypass liquid back pipe pipeline path, by the improvement of the liquid back pipe path to recuperation of heat, strengthen recuperation of heat shell
Time liquid energy power of pipe, the effectively decline of control low-pressure lateral pressure, it is to avoid low-voltage variation occur.
A kind of implementation method of the control method of liquid, the bypass of the adjustment recuperation of heat package are returned according to recuperation of heat of the present invention
The flow of liquid is managed back, including：The recuperation of heat package is in parallel with least one bypass pipe with magnetic valve, in the parallel connection
Bypass pipe main line on total magnetic valve is set, by the total electricity on the magnetic valve and the main line of control each bypass pipe
Magnet valve adjusts the flow of the bypass pipe time liquid of the recuperation of heat package.Technical scheme is by adjusting recuperation of heat package
Bypass back liquid stream number, so as to adjust the pressure value of low-pressure side, solve to return caused by recuperation of heat hydrops that liquid is bad and low pressure
Protection exception phenomenon.Flowed to by the analysis to system refrigerant flow, simulation refrigerant, be not difficult to draw and returned due to increased recuperation of heat
The pipeline path number of liquid, effectively shunts the refrigerant that recuperation of heat package accumulates, and is efficient time liquid, reliability of unit
Operation provides effective solution.
Fig. 2 is the device structure schematic diagram of the control method that liquid is returned in the recuperation of heat that the present invention is provided.Equipment shown in Fig. 2
Label is as follows：1 is compressor, and 2 is oil eliminator, and 3 is condenser, and 4 is electric expansion valve, and 5 is shell-tube evaporator, and 6 return for heat
Package (full-liquid type) is received, 7 is plate type heat exchanger, and 8 is bypass pipe, and 9 is magnetic valve, and 10 is parallel pipeline group, and 11 is total magnetic valve,
12 is low-pressure sensor, and 13 is recuperation of heat refrigerant exit temperature-sensitive bag, and 14 is recuperation of heat delivery port water temperature temperature-sensitive bag.Wherein,
Parallel pipeline group 10 shown in dashed rectangle region is made up of bypass pipe 8, magnetic valve 9, total magnetic valve 11 and respective line.
The parallel pipeline group 10 is exactly at least one bypass pipe 8 with magnetic valve 9 being arranged in parallel with the recuperation of heat package.Often
Magnetic valve 9 is installed on branch road where individual bypass pipe 8 itself, the flow of the branch road where for controlling each bypass pipe 8.And
And total magnetic valve 11 is installed on main line, as the master switch of parallel pipeline group 10.In addition, the low-pressure side in compressor 1 is set
Low-pressure sensor 12, for detecting compressor low-pressure lateral pressure value；Recuperation of heat refrigerant is set at recuperation of heat refrigerant exit
Outlet temperature-sensitive bag 13, sets recuperation of heat delivery port water temperature temperature-sensitive bag 14, for the test side temperature difference in recuperation of heat water outlet.
The step of Fig. 3 is a kind of preferred embodiment of the control method that liquid is returned in the recuperation of heat that the present invention is provided flow chart.Ginseng
See Fig. 1 and Fig. 3, performed after detecting step S110 determination step S120, the determination step S120 also include step S210,
Step S220, step S230：If the compressor low-pressure lateral pressure value for detecting is more than or equal to default first pressure threshold value,
Or the end temperature difference for detecting is more than or equal to default temperature threshold, then performs step S210 and judge recuperation of heat package without product
Liquid；If the compressor low-pressure lateral pressure value for detecting is more than or equal to default second pressure threshold value and less than default first
Pressure threshold, or the end temperature difference for detecting is less than default temperature threshold, then perform step S220 and judge recuperation of heat package
There is a small amount of hydrops；If the compressor low-pressure lateral pressure value for detecting is more than or equal to default 3rd pressure threshold and less than pre-
If second pressure threshold value, or the end temperature difference for detecting is less than default temperature threshold, then perform step S230 and judge heat
Reclaiming package has volume hydrops, and the 3rd pressure threshold is low pressure protection value.Wherein, first pressure threshold value, the second pressure
Force threshold, the 3rd pressure threshold and temperature threshold can be default according to actual conditions, it is preferable that can be preset as the 3rd pressure threshold
The low pressure protection value of system.Specifically, can set：First pressure threshold value P1=310Kpa (is applied to R134a refrigerants), the
Two pressure threshold P2=270Kpa (are applied to R134a refrigerants), and the 3rd pressure threshold P3=220Kpa (is applied to R134a cold
Matchmaker), temperature threshold=3 DEG C.
Referring back to Fig. 1 and Fig. 3, set-up procedure S130 is performed after determination step S120, the set-up procedure S130 is also
Including step S240, step S250, step S260：If the result of determination of the hydrops amount of the recuperation of heat package is recuperation of heat package
Without hydrops, then total magnetic valve 11 is closed (step S240 is performed i.e. after step S210)；If the recuperation of heat package
The result of determination of hydrops amount have a small amount of hydrops for recuperation of heat package, then total magnetic valve 11 is opened, by the n bypass
The magnetic valve 9 of pipe is opened, and the opening number of magnetic valve (is performed i.e. after step S220 when wherein n is default a small amount of hydrops
Step S250)；If the result of determination of the hydrops amount of the recuperation of heat package has volume hydrops for recuperation of heat package, will be described total
Magnetic valve 11 is opened, and (performs step after step S230 by the magnetic valve 9 of all of bypass pipe is fully open
S260)。
A kind of implementation method of the control method of liquid is returned according to recuperation of heat of the present invention, is also included：If the pressure for detecting
Contracting machine low-pressure lateral pressure value is less than low pressure protection value, and the magnetic valve 9 and total magnetic valve 11 of all of bypass pipe 8 are complete
Portion is in open mode, then control unit to enter low-voltage variation stopped status.If low-pressure lateral pressure value is too small, through bypass pipe
Cannot still be adjusted after flow adjustment, when recuperation of heat liquid back pipe way solenoid valve is all turned on, low-pressure lateral pressure value is still less than low pressure
Pressure protection value, system carries out low-voltage variation shutdown.
Another aspect of the present invention provides the control device that liquid is returned in a kind of recuperation of heat again.Fig. 4 is the heat that the present invention is provided
Reclaim back the overall structure figure of the control device of liquid.Referring to Fig. 4 and Fig. 2, the control device that liquid is returned in recuperation of heat of the present invention includes：Inspection
Measurement equipment 100, including low-pressure sensor 12, for detecting compressor low-pressure lateral pressure value；The testing equipment also includes
Recuperation of heat refrigerant exit temperature-sensitive bag 13 and recuperation of heat delivery port water temperature temperature-sensitive bag 14, for the test side temperature difference, the end temperature difference is
The temperature difference of recuperation of heat outlet refrigerant temperature and recuperation of heat leaving water temperature；Determination module 200, for the pressure detected according to
Contracting machine low-pressure lateral pressure value and the end temperature difference judge the hydrops amount of recuperation of heat package；Adjusting module 300, for according to the recuperation of heat
The result of determination of the hydrops amount of package, recuperation of heat package described in the flow shunt of liquid is returned by the bypass pipe for adjusting recuperation of heat package
Hydrops.
A kind of implementation method of the control device of liquid is returned according to recuperation of heat of the present invention, is arranged in parallel with the recuperation of heat package
There is at least one bypass pipe 8 with magnetic valve 9, total magnetic valve 11, institute are provided with the main line of the bypass pipe in parallel
Stating the total magnetic valve 11 on the magnetic valve 9 and the main line of each bypass pipe is used to adjust the bypass pipe time of the recuperation of heat package
The flow of liquid.
A kind of implementation method of the control method of liquid is returned according to recuperation of heat of the present invention, the determination module 200 is additionally operable to：If
The compressor low-pressure lateral pressure value for detecting is more than or equal to default first pressure threshold value, or the end temperature difference for detecting
More than or equal to default temperature threshold, then judge recuperation of heat package without hydrops；If the compressor low-pressure lateral pressure for detecting
Value is less than more than or equal to default second pressure threshold value and less than default first pressure threshold value, or the end temperature difference for detecting
Default temperature threshold, then judge that recuperation of heat package has a small amount of hydrops；If the compressor low-pressure lateral pressure value for detecting is big
It is less than and presets in equal to default 3rd pressure threshold and less than default second pressure threshold value, or the end temperature difference for detecting
Temperature threshold, then judge that recuperation of heat package has a volume hydrops, the 3rd pressure threshold is low pressure protection value.
A kind of implementation method of the control method of liquid is returned according to recuperation of heat of the present invention, the adjusting module 300 is additionally operable to：If
The result of determination of the hydrops amount of the recuperation of heat package be recuperation of heat package without hydrops, then by total closed electromagnetic valve；If institute
The result of determination of hydrops amount of recuperation of heat package is stated for recuperation of heat package has a small amount of hydrops, is then opened total magnetic valve, by n
The magnetic valve of the individual bypass pipe is opened, the opening number of magnetic valve when wherein n is default a small amount of hydrops；If the recuperation of heat
The result of determination of the hydrops amount of package has volume hydrops for recuperation of heat package, then open total magnetic valve, by all of institute
The magnetic valve for stating bypass pipe is fully open.
Fig. 5 is a kind of structural representation of preferred embodiment of the control device that liquid is returned in the recuperation of heat that the present invention is provided.Ginseng
See Fig. 5 and Fig. 2, described device also includes low-voltage variation module 500, is used for：If the compressor low-pressure lateral pressure for detecting
Value is less than low pressure protection value, and the magnetic valve 9 and total magnetic valve 11 of all of bypass pipe 8 are completely in open shape
State, then control unit to enter low-voltage variation stopped status.Wherein parallel pipeline group 10 is by bypass pipe 8, magnetic valve 9, total magnetic valve
11 and respective line composition.
Another aspect of the present invention provides a kind of unit again, with heat reclamation device, with described in any of the above-described
Device.The technical scheme that the present invention is provided goes for cooling by wind, source pump, or other are with heat reclamation device
Unit etc..
Technical scheme returns the flow of liquid by adjusting the bypass pipe of recuperation of heat package, effectively shunts recuperation of heat
The refrigerant that package accumulates, imports condenser side until evaporation side, that strengthens recuperation of heat package returns liquid energy power, reduces refrigerant by refrigerant
Heat exchange in recuperation of heat package.And then it is big by the flow of recuperation of heat package bypass liquid back pipe inflow condenser to change refrigerant
It is small, so as to adjust the size of whole machine low-pressure side coolant quantity and the size of low-pressure lateral pressure, prevent recuperation of heat hydrops and return liquid it is bad,
Unit low-pressure lateral pressure is too low, the low-voltage variation of appearance and cause shut down and unit operation unstable state, make unit high efficiency
Return liquid, greatly improve the reliability of unit operation in ground.
Function described herein can be implemented in hardware, the software by computing device, firmware or its any combinations.
If implemented in the software by computing device, then computer can be stored in using function as one or more instructions or code
Transmitted on readable media or via computer-readable media.Other examples and embodiment will in of the invention and appended right
Ask in the scope and spirit of book.For example, be attributed to the property of software, function described above can be used by processor,
The software implementation of hardware, firmware, hardwired or the combination execution for appointing whichever in these.Additionally, each functional unit can be with integrated
In a processing unit, or unit is individually physically present, it is also possible to which two or more units are integrated in
In one unit.
In several embodiments provided herein, it should be understood that disclosed technology contents, can be by other
Mode is realized.Wherein, device embodiment described above is only schematical, such as division of described unit, Ke Yiwei
A kind of division of logic function, can there is other dividing mode when actually realizing, such as multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be the INDIRECT COUPLING or communication link of unit or module by some interfaces
Connect, can be electrical or other forms.
It is described as separating component illustrate unit can be or may not be it is physically separate, as control fill
The part put can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can be according to the actual needs selected to realize the purpose of this embodiment scheme.
If the integrated unit is to realize in the form of SFU software functional unit and as independent production marketing or use
When, can store in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part for being contributed to prior art in other words or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are used to so that a computer
Equipment (can be personal computer, server or network equipment etc.) perform each embodiment methods described of the invention whole or
Part steps.And foregoing storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with store program codes
Medium.
Embodiments of the invention are the foregoing is only, is not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.All any modifications within the spirit and principles in the present invention, made,
Equivalent, improvement etc., should be included within scope of the presently claimed invention.
Claims (11)
1. the control method of liquid is returned in a kind of recuperation of heat, it is characterised in that including：
Detecting step, for detecting compressor low-pressure lateral pressure value and the end temperature difference, the end temperature difference is recuperation of heat refrigerant exit temperature
The temperature difference of degree and recuperation of heat leaving water temperature；
Determination step, compressor low-pressure lateral pressure value and the end temperature difference for being detected according to judge the product of recuperation of heat package
Liquid measure；
Set-up procedure, for the result of determination of the hydrops amount according to the recuperation of heat package, by the side for adjusting recuperation of heat package
The hydrops of recuperation of heat package described in the flow shunt of siphunculus time liquid.
2. method according to claim 1, it is characterised in that the bypass pipe of the adjustment recuperation of heat package returns the stream of liquid
Amount, including：The recuperation of heat package is in parallel with least one bypass pipe with magnetic valve, in the bypass pipe in parallel
Total magnetic valve is set on main line, institute is adjusted by the total magnetic valve on the magnetic valve and the main line of control each bypass pipe
The bypass pipe for stating recuperation of heat package returns the flow of liquid.
3. method according to claim 2, it is characterised in that the determination step also includes：
If the compressor low-pressure lateral pressure value for detecting is more than or equal to default first pressure threshold value, or described detects
The end temperature difference is more than or equal to default temperature threshold, then judge recuperation of heat package without hydrops；
If the compressor low-pressure lateral pressure value for detecting is more than or equal to default second pressure threshold value and less than default the
One pressure threshold, or the end temperature difference for detecting is less than default temperature threshold, then judge that recuperation of heat package has a small amount of hydrops；
If the compressor low-pressure lateral pressure value for detecting is more than or equal to default 3rd pressure threshold and less than default the
Two pressure thresholds, or the end temperature difference for detecting is less than default temperature threshold, then judge that recuperation of heat package has volume hydrops,
3rd pressure threshold is low pressure protection value.
4. method according to claim 3, it is characterised in that the set-up procedure also includes：
If the result of determination of the hydrops amount of the recuperation of heat package be recuperation of heat package without hydrops, will total magnetic valve pass
Close；
If the result of determination of the hydrops amount of the recuperation of heat package has a small amount of hydrops for recuperation of heat package, by total magnetic valve
Open, the n magnetic valve of the bypass pipe is opened, the opening number of magnetic valve when wherein n is default a small amount of hydrops；
If the result of determination of the hydrops amount of the recuperation of heat package has volume hydrops for recuperation of heat package, by total magnetic valve
Open, the magnetic valve of all of bypass pipe is fully open.
5. the method according to any one of claim 2-4, it is characterised in that also include：If the compression for detecting
Machine low-pressure lateral pressure value is less than low pressure protection value, and the magnetic valve and total magnetic valve of all of bypass pipe are completely in
Open mode, then control unit to enter low-voltage variation stopped status.
6. the control device of liquid is returned in a kind of recuperation of heat, it is characterised in that including：
Testing equipment, including low-pressure sensor, for detecting compressor low-pressure lateral pressure value；The testing equipment also includes
Recuperation of heat refrigerant exit temperature-sensitive bag and recuperation of heat delivery port water temperature temperature-sensitive bag, for the test side temperature difference, the end temperature difference is returned for heat
Receive the temperature difference of outlet refrigerant temperature and recuperation of heat leaving water temperature；
Determination module, compressor low-pressure lateral pressure value and the end temperature difference for being detected according to judge the product of recuperation of heat package
Liquid measure；
Adjusting module, for the result of determination of the hydrops amount according to the recuperation of heat package, by the side for adjusting recuperation of heat package
The hydrops of recuperation of heat package described in the flow shunt of siphunculus time liquid.
7. device according to claim 6, it is characterised in that be arranged in parallel at least one band with the recuperation of heat package
There is the bypass pipe of magnetic valve, total magnetic valve, the electricity of each bypass pipe are provided with the main line of the bypass pipe in parallel
Total magnetic valve on magnet valve and the main line is used to adjust the flow of the bypass pipe time liquid of the recuperation of heat package.
8. device according to claim 7, it is characterised in that the determination module is additionally operable to：
If the compressor low-pressure lateral pressure value for detecting is more than or equal to default first pressure threshold value, or described detects
The end temperature difference is more than or equal to default temperature threshold, then judge recuperation of heat package without hydrops；
If the compressor low-pressure lateral pressure value for detecting is more than or equal to default second pressure threshold value and less than default the
One pressure threshold, or the end temperature difference for detecting is less than default temperature threshold, then judge that recuperation of heat package has a small amount of hydrops；
If the compressor low-pressure lateral pressure value for detecting is more than or equal to default 3rd pressure threshold and less than default the
Two pressure thresholds, or the end temperature difference for detecting is less than default temperature threshold, then judge that recuperation of heat package has volume hydrops,
3rd pressure threshold is low pressure protection value.
9. device according to claim 8, it is characterised in that the adjusting module is additionally operable to：
If the result of determination of the hydrops amount of the recuperation of heat package be recuperation of heat package without hydrops, will total magnetic valve pass
Close；
If the result of determination of the hydrops amount of the recuperation of heat package has a small amount of hydrops for recuperation of heat package, by total magnetic valve
Open, the n magnetic valve of the bypass pipe is opened, the opening number of magnetic valve when wherein n is default a small amount of hydrops；
If the result of determination of the hydrops amount of the recuperation of heat package has volume hydrops for recuperation of heat package, by total magnetic valve
Open, the magnetic valve of all of bypass pipe is fully open.
10. the device according to any one of claim 7-9, it is characterised in that also including low-voltage variation module, be used for：
If the compressor low-pressure lateral pressure value for detecting be less than low pressure protection value, and all of bypass pipe magnetic valve
Open mode is completely in total magnetic valve, then controls unit to enter low-voltage variation stopped status.
11. a kind of units, with heat reclamation device, it is characterised in that with the dress as any one of claim 6-10
Put.
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| CN201611111216.0A CN106766448B (en) | 2016-12-06 | 2016-12-06 | Control method and device for heat recovery liquid return and unit with device |
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| CN201611111216.0A CN106766448B (en) | 2016-12-06 | 2016-12-06 | Control method and device for heat recovery liquid return and unit with device |
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| CN106766448B (en) | 2018-11-09 |
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