CN108800634A - Two stage centrifugal handpiece Water Chilling Units and its control method of level-one throttling, device - Google Patents
Two stage centrifugal handpiece Water Chilling Units and its control method of level-one throttling, device Download PDFInfo
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- CN108800634A CN108800634A CN201810713890.9A CN201810713890A CN108800634A CN 108800634 A CN108800634 A CN 108800634A CN 201810713890 A CN201810713890 A CN 201810713890A CN 108800634 A CN108800634 A CN 108800634A
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- 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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- 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
- F25B41/30—Expansion means; Dispositions thereof
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of two stage centrifugal handpiece Water Chilling Units and its control method of level-one throttling, devices.Control method includes the following steps：According to the variation of handpiece Water Chilling Units load, the current goal degree of supercooling of condenser is adjusted；According to the current goal degree of supercooling, level-one throttle valve is adjusted.The control method of two stage centrifugal handpiece Water Chilling Units and its level-one throttling disclosed by the invention, device, realize the variation according to load, the efficiency of handpiece Water Chilling Units when dynamically adjusting level-one throttle valve, therefore improving sub-load.
Description
Technical field
The present invention relates to the controls that air-conditioning technical field more particularly to a kind of two stage centrifugal handpiece Water Chilling Units and its level-one throttle
Method, apparatus.
Background technology
Two stage centrifugal compressor is widely used in centrifugal water chillers.Typically for two stage centrifugal handpiece Water Chilling Units,
Level-one throttling is affected to efficiency, in order to improve unit all the period of time operational energy efficiency, conventional method be for energy it is smaller from
Scheming group generally use electric expansion valve or analog quantity electric butterfly valve carry out first order auxiliary adjustment, to adjust cold medium flux,
And then realize Load Regulation, control parameter is usually evaporator liquid level or suction superheat.
But the control mode of above-mentioned level-one throttling, under the operating mode of the small flow of sub-load, especially high pressure ratio, condenser
Side is easier to liquid level reduction occur, and partial high pressure gas is caused to enter economizer by restricting orifice or electric expansion valve, to
Reduce the efficiency of handpiece Water Chilling Units.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, first purpose of the present invention is to propose the control of a kind of two stage centrifugal handpiece Water Chilling Units and its level-one throttling
Method, it is dynamic to change target degree of supercooling to realize the variation according to load, to realize the adjusting of level-one throttle valve, improve
The efficiency of handpiece Water Chilling Units when sub-load.
Second object of the present invention is a kind of control device of two stage centrifugal handpiece Water Chilling Units level-one throttling.
Third object of the present invention is to propose a kind of two stage centrifugal handpiece Water Chilling Units
Fourth object of the present invention is to propose a kind of electronic equipment.
The 5th purpose of the present invention is to propose a kind of non-transitorycomputer readable storage medium.
In order to achieve the above object, the first aspect of the present invention embodiment proposes a kind of two stage centrifugal handpiece Water Chilling Units level-one throttling
Control method, including：According to the variation of handpiece Water Chilling Units load, the current goal degree of supercooling of condenser is adjusted；According to current mesh
Degree of supercooling is marked, level-one throttle valve is adjusted.
The control method of the two stage centrifugal handpiece Water Chilling Units level-one throttling of the embodiment of the present invention, can be according to handpiece Water Chilling Units load
Variation, dynamic adjust condenser current goal degree of supercooling level-one throttle valve is adjusted according to current goal degree of supercooling
Section realizes the variation according to load, the energy of handpiece Water Chilling Units when dynamically adjusting level-one throttle valve, therefore improving sub-load
Effect.
In order to achieve the above object, second aspect of the present invention embodiment proposes a kind of throttling of two stage centrifugal handpiece Water Chilling Units level-one
Control device, including：Module is adjusted, for the variation according to handpiece Water Chilling Units load, adjusts the current goal degree of supercooling of condenser；
Adjustment module, for according to current goal degree of supercooling, level-one throttle valve to be adjusted.
The control device of the two stage centrifugal handpiece Water Chilling Units level-one throttling of the embodiment of the present invention, can be according to handpiece Water Chilling Units load
Variation, dynamic adjusts the current goal degree of supercooling of condenser, and according to current goal degree of supercooling, adjusted to level-one throttle valve
Section realizes the variation according to load, and dynamic adjusts level-one throttle valve, therefore even if in the case where suppressing the operating mode than small flow
The efficiency of handpiece Water Chilling Units when improving sub-load.
In order to achieve the above object, third aspect present invention embodiment proposes a kind of two stage centrifugal handpiece Water Chilling Units, including：Such as this
The control device of two stage centrifugal handpiece Water Chilling Units level-one throttling described in invention second aspect embodiment.
The two stage centrifugal handpiece Water Chilling Units of the embodiment of the present invention can dynamically adjust cold according to the variation of handpiece Water Chilling Units load
The current goal degree of supercooling of condenser is adjusted level-one throttle valve, realizes according to load according to current goal degree of supercooling
The efficiency of handpiece Water Chilling Units when changing, dynamic adjustment level-one throttle valve, therefore improving sub-load.
In order to achieve the above object, fourth aspect present invention embodiment proposes a kind of electronic equipment, including：Memory, processing
Device and storage are on a memory and the computer program that can run on a processor, processor execute program, to realize such as this hair
The control method of the two stage centrifugal handpiece Water Chilling Units level-one throttling of bright first aspect embodiment.
In order to achieve the above object, fifth aspect present invention embodiment proposes a kind of non-transitory computer-readable storage medium
Matter is stored thereon with computer program, which is executed by processor, for realizing such as first aspect present invention embodiment
The control method of two stage centrifugal handpiece Water Chilling Units level-one throttling.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
Fig. 1 is the control method flow chart to be throttled according to the two stage centrifugal handpiece Water Chilling Units level-one of one embodiment of the invention；
Fig. 2 is the control method flow to be throttled according to the two stage centrifugal handpiece Water Chilling Units level-one of another embodiment of the present invention
Figure；
Fig. 3 is to form figure according to the control device that the two stage centrifugal handpiece Water Chilling Units level-one of one embodiment of the invention throttles.
Specific implementation mode
The embodiment of the present invention is described below in detail, the example of embodiment is shown in the accompanying drawings, wherein identical from beginning to end
Or similar label indicates same or similar element or element with the same or similar functions.It is retouched below with reference to attached drawing
The embodiment stated is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The two stage centrifugal handpiece Water Chilling Units of the embodiment of the present invention and its control method of level-one throttling are described below in conjunction with the accompanying drawings
And device.
Fig. 1 is the control method flow chart to be throttled according to the two stage centrifugal handpiece Water Chilling Units level-one of one embodiment of the invention.
As shown in Figure 1, a kind of control method of two stage centrifugal handpiece Water Chilling Units level-one throttling of the embodiment of the present invention, including with
Lower step：
S101 adjusts the current goal degree of supercooling of condenser according to the variation of handpiece Water Chilling Units load.
Specifically, the load of handpiece Water Chilling Units is detected in real time, and according to the variation of load, dynamic adjusts the current mesh of condenser
Mark degree of supercooling Δ T.
S102 is adjusted level-one throttle valve according to current goal degree of supercooling.
Specifically, using current goal degree of supercooling Δ T as target component, the aperture of level-one throttle valve is adjusted, to
Realize the variation according to load, dynamic adjusts the aperture of level-one throttle valve, when avoiding sub-load, because of opening for level-one throttle valve
It spends small so that the pressure of economizer is too small, and the efficiency of handpiece Water Chilling Units reduces.
When current loads, current degree of supercooling=Tsat-Tc of condenser, Tsat are the current saturation temperature of condenser, Tc
Currently go out liquid temperature for condenser, since heat transfer needs certain temperature difference, the current theory achieved by condenser
Maximum subcooled temperature (Δ T) max=Tsat-Tci.When the inflow temperature of condenser is constant, with the reduction of load, condenser is worked as
Preceding saturation temperature Tsat is reduced, and current theoretical maximum degree of supercooling (Δ T) max is necessarily reduced, therefore current goal degree of supercooling is also answered
This is reduced accordingly, otherwise in small load condition, in fact it could happen that level-one throttle valve has completely closed, and current degree of supercooling does not still have
The case where reaching current goal degree of supercooling worse since level-one throttle valve closes too small, causes the pressure of economizer inclined
It is small, so that handpiece Water Chilling Units efficiency reduces.Therefore, the embodiment of the present invention is according to the variation of load, dynamic adjustment level-one throttling
The aperture of valve, when avoiding sub-load, because the aperture of level-one throttle valve is too small so that the pressure of economizer is too small, cooling-water machine
The efficiency of group reduces.
The control method of the two stage centrifugal handpiece Water Chilling Units level-one throttling of the embodiment of the present invention, can be according to handpiece Water Chilling Units load
Variation, dynamic adjust condenser current goal degree of supercooling level-one throttle valve is adjusted according to current goal degree of supercooling
Section realizes the variation according to load, the energy of handpiece Water Chilling Units when dynamically adjusting level-one throttle valve, therefore improving sub-load
Effect.
Fig. 2 is the control method flow to be throttled according to the two stage centrifugal handpiece Water Chilling Units level-one of another embodiment of the present invention
Figure.The control method of the two stage centrifugal handpiece Water Chilling Units level-one throttling of the embodiment of the present invention, is two stage centrifugal cooling-water machine shown in FIG. 1
A kind of specific implementation mode of the control method of group level-one throttling.As shown in Fig. 2, the two stage centrifugal cooling-water machine of the embodiment of the present invention
The control method of group level-one throttling, including：
On the basis of embodiment shown in Fig. 1, as the first embodiments possible, step S101 specifically includes following step
Rapid S201-S202.
S201 calculates the difference of the current saturation temperature and current inflow temperature of condenser, obtains condensing when current loads
The current theoretical maximum degree of supercooling of device.
Specifically, when calculating current loads, the difference of the current saturation temperature Tsat and current inflow temperature Tci of condenser
Value, obtains the current theoretical maximum degree of supercooling (Δ T) of condenser when current loadsmax=Tsat-Tci.
S202, according to current theoretical maximum degree of supercooling and at full capacity when condenser target degree of supercooling at full capacity, calculate
To the current goal degree of supercooling of condenser when current loads.
Specifically, according to current theoretical maximum degree of supercooling (Δ T)maxCondenser is expired when (i.e. 100% load) at full capacity
Load target degree of supercooling Δ T0 (for known quantity), the current goal degree of supercooling Δ T=Δs of condenser when current loads are calculated
T0*(ΔT)max/ξ.Wherein, ξ is and the relevant constant of condenser.
Further, step S202 may particularly include：The saturation temperature at full capacity of condenser when at full capacity is calculated to bear with full
The difference of lotus inflow temperature, the theoretical maximum degree of supercooling at full capacity of condenser when obtaining at full capacity；Calculate current theoretical maximum mistake
The ratio of cold degree and theoretical maximum degree of supercooling at full capacity, obtains the first load percentage；The first load percentage is calculated to bear with full
The product of lotus target degree of supercooling, obtains current goal degree of supercooling.
Specifically, when calculating at full capacity, the Tsat0 of saturation temperature at full capacity of condenser is with inflow temperature Tci0's at full capacity
Difference, the degree of supercooling of theoretical maximum at full capacity (Δ T0) of condenser when obtaining at full capacitymax=Tsat0-Tci0.Calculate current reason
By maximum subcooled temperature (Δ T)maxWith theoretical maximum degree of supercooling (Δ T0) at full capacitymaxRatio, obtain the first load percentage
Z1%=(Δ T)max/(ΔT0)max.Calculate the first load percentage z1% and target degree of supercooling Δ T0 at full capacity (for known quantity)
Product, obtain current goal degree of supercooling Δ T=Δ T0*z1%=Δ T0* (Δ T)max/(ΔT0)max=Δ T0* (Δ T)max/
(Tsat0-Tci0).It is theoretical maximum degree of supercooling (Δ T0) at full capacity by ξ valuesmax=Tsat0-Tci0.
On the basis of embodiment shown in Fig. 1, as second of embodiments possible, step S101 specifically includes following step
Suddenly：The difference for calculating the current leaving water temperature and current inflow temperature of condenser, obtain condenser when current loads when advance
Temperature difference of outlet water；The difference for calculating the leaving water temperature at full capacity of condenser and inflow temperature at full capacity under rated designs operating mode, obtains
The specified disengaging water temperature difference of condenser under rated designs operating mode；Calculate the ratio of current disengaging water temperature difference and specified disengaging water temperature difference
Value, obtains the second load percentage；Calculate the second load percentage at full capacity when condenser target at full capacity degree of supercooling
Product obtains current goal degree of supercooling.
Specifically, when calculating current loads, the difference of the current leaving water temperature Tco and current inflow temperature Tci of condenser,
Obtain the current Inlet and outlet water temperature difference T of condenser when current loadsThe current temperature difference=Tco-Tci.It calculates under rated designs operating mode, condensation
The difference of the Tco0 of leaving water temperature at full capacity of device and inflow temperature Tci0 at full capacity, obtain the volume of condenser under rated designs operating mode
Determine Inlet and outlet water temperature difference TThe specified temperature difference=Tco0-Tci0.Calculate current Inlet and outlet water temperature difference TThe current temperature differenceWith specified Inlet and outlet water temperature difference
TThe specified temperature differenceRatio, obtain the second load percentage z1%=Δs TThe current temperature difference/ΔTThe specified temperature difference；Calculate the second load percentage z1% with
The product of the degree of supercooling Δ of the target at full capacity T0 (for known quantity) of condenser, obtains current goal degree of supercooling Δ T=when at full capacity
Δ T0*z2%=Δ T0* Δs TThe current temperature difference/ΔTThe specified temperature difference=Δ T0* (Tco-Tci)/(Tco0-Tci0).
On the basis of embodiment shown in Fig. 1, step S102 specifically includes following steps：S203-S204.
S203 currently runs pressure ratio according to handpiece Water Chilling Units, is modified to current goal degree of supercooling.
Specifically, when unit operation pressure ratio changes, high pressure ratio is obtained according to said program with small pressure ratio at full capacity at full capacity
To target degree of supercooling Δ T answer it is essentially the same, but before and after small pressure ratio, level-one throttle valve pressure difference reduce, ensure phase
Under conditions of degree of supercooling, small pressure ratio operating mode refrigerant flow will strongly reduce, and be then likely to occur degree of supercooling at this time and meet control
System requires, but the case where owing liquid occurs in subordinate's container (economizer).It is therefore desirable to introduce system currently to run pressure ratio ε to above-mentioned
The current goal degree of supercooling Δ T that scheme obtains is modified.The saturation pressure Pc, sat of current operation pressure ratio ε=current condenser
With the ratio=Pc, sat/Pe, sat of saturation pressure Pe, sat when front evaporator.
Correction function is represented by f (ε), simply can be taken as f (ε)=a ε+b, wherein the coefficient of 0≤a≤1, b is normal
Number.Work as a=0, when b=1, it is scheme before above-mentioned amendment that the program, which is degenerated,.Revised current goal degree of supercooling Δ TIt corrects=f
(ε) * Δs T=(a ε+b) * Δs T.
S204 is adjusted level-one throttle valve according to revised current goal degree of supercooling.
Specifically, with revised current goal degree of supercooling Δ TIt correctsFor target component, the aperture of level-one throttle valve is carried out
It adjusts, to realize the variation according to load, dynamic adjusts the aperture of level-one throttle valve, when avoiding sub-load, because of level-one
The aperture of throttle valve is too small so that the pressure of economizer is too small, and the efficiency of handpiece Water Chilling Units reduces.
Further, step S203 may particularly include：The ratio for calculating current operation pressure ratio and specified operation pressure ratio, obtains
Correction factor；The product for calculating correction factor and current goal degree of supercooling, obtains revised current goal degree of supercooling.
Specifically, calculating the ratio of current operation pressure ratio ε and specified operation pressure ratio ε 0, correction factor c is obtained.It calculates and corrects
The product of coefficient c and current goal degree of supercooling Δ T obtain revised current goal degree of supercooling Δ TIt corrects=c* Δ T=ε * Δs T/
ε0.It is 1/ ε 0 by a values, b values are 0.
The calculating process and makeover process of above-mentioned target degree of supercooling Δ T to clearly illustrate, below citing illustrate.
Certain known handpiece Water Chilling Units rated designs operating mode is 7/30, i.e., the leaving water temperature at full capacity of evaporator is 7 DEG C, condenser
The Tci0 of inflow temperature at full capacity be 30 DEG C, evaporator and condenser Inlet and outlet water are 5 DEG C of temperature difference, the saturation at full capacity of condenser
Temperature Tsat0 be 36 DEG C, at full capacity when T0=3 DEG C of the degree of supercooling of target at full capacity Δ.ξ=(Tsat0-Tci0)=36 DEG C -30
DEG C=6 DEG C.
Example one：
Assuming that above-mentioned handpiece Water Chilling Units are currently operating under rated designs operating mode 7/30, i.e. the current leaving water temperature of evaporator is
7 DEG C, the current inflow temperature Tci of condenser is 30 DEG C, load 50%, and the current saturation temperature Tsat of condenser is 33 DEG C,
Current goal degree of supercooling Δ T=Δs T0* (Tsat-Tci)/ξ=3* (33-30)/6=1.5 DEG C is then calculated at this time.
Example two：
Assuming that above-mentioned unit is currently operating under 7/24 operating mode, i.e., the current leaving water temperature of evaporator is 7 DEG C, condenser
Current inflow temperature Tci is 24 DEG C, load 50%, and the current saturation temperature Tsat of condenser is 27 DEG C, then calculates and work as at this time
Preceding target degree of supercooling Δ T=Δs T0* (Tsat-Tci)/ξ=3* (33-30)/6=1.5 DEG C.
After obtaining above-mentioned target degree of supercooling Δ T, introduces current operation pressure ratio ε and current goal degree of supercooling Δ T is modified.
Assuming that the current saturation temperature of evaporator is 6 DEG C, corresponding current saturation pressure is 362kPa；The current saturation temperature of condenser
Tsat is 27 DEG C, and corresponding current saturation pressure is 706kPa, then currently runs pressure ratio ε=706/362=1.95.It takes in f (ε)
ε 0=2.55 (i.e. above-mentioned handpiece Water Chilling Units under 7/30 operating mode, at full capacity when specified operation pressure ratio), b=0, i.e. f (ε)=1/
F (ε)=0.765 is calculated in 2.55 ε, then revised target degree of supercooling Δ T at this timeIt corrects=0.765*1.5=1.1475 DEG C.
Further, in implementation process, target mistake is coped in influence of the sensor accuracy to target degree of supercooling in order to prevent
There are one the restrictions of minimum value and maximum value for cold degree, i.e., if the target degree of supercooling calculated of said program is (or revised
Target degree of supercooling) be less than the minimum value when, then take the minimum value；When target degree of supercooling (or the revised target calculated
Degree of supercooling) be more than the maximum value when, then take the maximum value.By taking scheme when not being modified to target degree of supercooling as an example, Fig. 1 institutes
Show that the step S102 in embodiment specifically includes following steps：
If current goal degree of supercooling is less than preset minimum target degree of supercooling threshold value, according to minimum target degree of supercooling threshold
Value, is adjusted level-one throttle valve；If current goal degree of supercooling is more than preset maximum target degree of supercooling threshold value, according to most
Big target degree of supercooling threshold value, is adjusted level-one throttle valve；If current goal degree of supercooling is equal to or more than minimum target mistake
Cold degree threshold value, and be equal to or less than maximum target degree of supercooling threshold value, then according to current goal degree of supercooling, to level-one throttle valve into
Row is adjusted.
The control method of the two stage centrifugal handpiece Water Chilling Units level-one throttling of the embodiment of the present invention, can be according to handpiece Water Chilling Units load
Variation, dynamic adjust condenser current goal degree of supercooling level-one throttle valve is adjusted according to current goal degree of supercooling
Section realizes the variation according to load, the energy of handpiece Water Chilling Units when dynamically adjusting level-one throttle valve, therefore improving sub-load
Effect.
To realize that above-described embodiment, the present invention also propose a kind of control device of two stage centrifugal handpiece Water Chilling Units level-one throttling.
Fig. 3 is to form figure according to the control device that the two stage centrifugal handpiece Water Chilling Units level-one of one embodiment of the invention throttles, such as Fig. 3 institutes
Show, the control device of the two stage centrifugal handpiece Water Chilling Units level-one throttling of the embodiment of the present invention includes：Adjust module 10 and adjustment module
11。
Module 10 is adjusted, for the variation according to handpiece Water Chilling Units load, adjusts the current goal degree of supercooling of condenser.
Adjustment module 11, for according to current goal degree of supercooling, level-one throttle valve to be adjusted.
Further, in a kind of possible realization method of the embodiment of the present invention, adjustment module 10 includes：First calculates list
Member, the difference of current saturation temperature and current inflow temperature for calculating condenser, condenser works as when obtaining current loads
Preceding theoretical maximum degree of supercooling；Second computing unit, for according to current theoretical maximum degree of supercooling and at full capacity when condenser expire
Load target degree of supercooling, the current goal degree of supercooling of condenser when current loads are calculated.
Further, in a kind of possible realization method of the embodiment of the present invention, the second computing unit is specifically used for：It calculates
The difference of the saturation temperature at full capacity of condenser and inflow temperature at full capacity when at full capacity, condenser is full negative when obtaining at full capacity
Lotus theoretical maximum degree of supercooling；The ratio for calculating current theoretical maximum degree of supercooling and theoretical maximum degree of supercooling at full capacity, obtains first
Load percentage；The product for calculating the first load percentage and target degree of supercooling at full capacity, obtains current goal degree of supercooling.
Further, in a kind of possible realization method of the embodiment of the present invention, adjustment module 10 is specifically used for：It calculates cold
The difference of the current leaving water temperature and current inflow temperature of condenser obtains the current disengaging water temperature difference of condenser when current loads；
The difference for calculating the leaving water temperature at full capacity of condenser and inflow temperature at full capacity under rated designs operating mode, obtains rated designs work
The specified disengaging water temperature difference of condenser under condition；The ratio for calculating current disengaging water temperature difference and specified disengaging water temperature difference, obtains second
Load percentage；Calculate the second load percentage at full capacity when condenser the degree of supercooling of target at full capacity product, worked as
Preceding target degree of supercooling.
Further, in a kind of possible realization method of the embodiment of the present invention, adjustment module 11 includes：Amending unit and
Adjust unit.Amending unit is modified current goal degree of supercooling for currently running pressure ratio according to handpiece Water Chilling Units；It adjusts
Unit, for according to revised current goal degree of supercooling, level-one throttle valve to be adjusted.
Further, in a kind of possible realization method of the embodiment of the present invention, amending unit is specifically used for：It calculates current
The ratio for running pressure ratio and specified operation pressure ratio, obtains correction factor；The product of correction factor and current goal degree of supercooling is calculated,
Obtain revised current goal degree of supercooling.
Further, in a kind of possible realization method of the embodiment of the present invention, adjustment module 11 is specifically used for：If current
Target degree of supercooling is less than preset minimum target degree of supercooling threshold value, then according to minimum target degree of supercooling threshold value, to level-one throttle valve
It is adjusted；If current goal degree of supercooling is more than preset maximum target degree of supercooling threshold value, according to maximum target degree of supercooling threshold
Value, is adjusted level-one throttle valve；If current goal degree of supercooling is equal to or more than minimum target degree of supercooling threshold value, and is equal to
Or level-one throttle valve is adjusted then according to current goal degree of supercooling less than maximum target degree of supercooling threshold value.
It should be noted that the explanation of the aforementioned control method embodiment to the throttling of two stage centrifugal handpiece Water Chilling Units level-one
It is also applied for the control device of the two stage centrifugal handpiece Water Chilling Units level-one throttling of the embodiment, details are not described herein again.
The control device of the two stage centrifugal handpiece Water Chilling Units level-one throttling of the embodiment of the present invention, can be according to handpiece Water Chilling Units load
Variation, dynamic adjust condenser current goal degree of supercooling level-one throttle valve is adjusted according to current goal degree of supercooling
Section realizes the variation according to load, the energy of handpiece Water Chilling Units when dynamically adjusting level-one throttle valve, therefore improving sub-load
Effect.
In order to realize that above-described embodiment, the embodiment of the present invention also propose a kind of two stage centrifugal handpiece Water Chilling Units, including above-mentioned reality
Apply the control device that two stage centrifugal handpiece Water Chilling Units level-one shown in example throttles.
In order to realize above-described embodiment, the embodiment of the present invention also proposes a kind of electronic equipment, including memory, processor and
The computer program that can be run on a memory and on a processor is stored, processor executes program, to realize such as above-mentioned implementation
The control method of two stage centrifugal handpiece Water Chilling Units level-one throttling shown in example.
In order to realize that above-described embodiment, the embodiment of the present invention also propose a kind of non-transitorycomputer readable storage medium,
It is stored thereon with computer program, which is executed by processor, for realizing the two stage centrifugal as shown in above-described embodiment
The control method of handpiece Water Chilling Units level-one throttling.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
It can be combined in any suitable manner in a or multiple embodiments or example.In addition, without conflicting with each other, the technology of this field
The feature of different embodiments or examples described in this specification and different embodiments or examples can be combined by personnel
And combination.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (17)
1. a kind of control method of two stage centrifugal handpiece Water Chilling Units level-one throttling, which is characterized in that include the following steps：
According to the variation of handpiece Water Chilling Units load, the current goal degree of supercooling of condenser is adjusted；
According to the current goal degree of supercooling, level-one throttle valve is adjusted.
2. control method according to claim 1, which is characterized in that the variation according to handpiece Water Chilling Units load, adjustment
The current goal degree of supercooling of condenser, including：
The difference for calculating the current saturation temperature and current inflow temperature of condenser, obtains the current reason of condenser when current loads
By maximum subcooled temperature；
The target degree of supercooling at full capacity of condenser when according to the current theoretical maximum degree of supercooling and at full capacity is calculated current
The current goal degree of supercooling of condenser when load.
3. control method according to claim 2, which is characterized in that it is described according to the current theoretical maximum degree of supercooling and
The target degree of supercooling at full capacity of condenser when at full capacity, the current goal supercooling of condenser when current loads are calculated
Degree, including：
The difference for calculating the saturation temperature at full capacity of condenser and inflow temperature at full capacity when at full capacity, condenses when obtaining at full capacity
The theoretical maximum degree of supercooling at full capacity of device；
The ratio for calculating the current theoretical maximum degree of supercooling and the degree of supercooling of theoretical maximum at full capacity, obtains the first load hundred
Divide ratio；
The product for calculating first load percentage and the degree of supercooling of target at full capacity obtains the current goal supercooling
Degree.
4. control method according to claim 1, which is characterized in that the variation according to handpiece Water Chilling Units load, adjustment
The current goal degree of supercooling of condenser, including：
The difference for calculating the current leaving water temperature and current inflow temperature of condenser, obtain condenser when current loads when advance
Temperature difference of outlet water；
The difference for calculating the leaving water temperature at full capacity of condenser and inflow temperature at full capacity under rated designs operating mode, obtains specified set
Count the specified disengaging water temperature difference of condenser under operating mode；
The ratio for calculating current the disengaging water temperature difference and the specified disengaging water temperature difference, obtains the second load percentage；
Calculate second load percentage at full capacity when condenser the degree of supercooling of target at full capacity product, obtain described work as
Preceding target degree of supercooling.
5. control method according to claim 1, which is characterized in that it is described according to the current goal degree of supercooling, to one
Grade throttle valve is adjusted, including：
Pressure ratio is currently run according to handpiece Water Chilling Units, the current goal degree of supercooling is modified；
According to the revised current goal degree of supercooling, the level-one throttle valve is adjusted.
6. control method according to claim 5, which is characterized in that it is described currently to run pressure ratio according to handpiece Water Chilling Units, it is right
The current goal degree of supercooling is modified, including：
The ratio for calculating current the operation pressure ratio and specified operation pressure ratio, obtains correction factor；
The product for calculating the correction factor and the current goal degree of supercooling obtains the revised current goal mistake
Cold degree.
7. control method according to claim 1, which is characterized in that it is described according to the current goal degree of supercooling, to one
Grade throttle valve is adjusted, including：
If the current goal degree of supercooling is less than preset minimum target degree of supercooling threshold value, according to the minimum target degree of supercooling
The level-one throttle valve is adjusted in threshold value；
If the current goal degree of supercooling is more than preset maximum target degree of supercooling threshold value, according to the maximum target degree of supercooling
The level-one throttle valve is adjusted in threshold value；
If the current goal degree of supercooling is equal to or more than the minimum target degree of supercooling threshold value, and equal to or less than described
Maximum target degree of supercooling threshold value is adjusted the level-one throttle valve then according to the current goal degree of supercooling.
8. a kind of control device of two stage centrifugal handpiece Water Chilling Units level-one throttling, which is characterized in that including：
Module is adjusted, for the variation according to handpiece Water Chilling Units load, adjusts the current goal degree of supercooling of condenser；
Adjustment module, for according to the current goal degree of supercooling, level-one throttle valve to be adjusted.
9. control device according to claim 8, which is characterized in that the adjustment module includes：
First computing unit, the difference of current saturation temperature and current inflow temperature for calculating condenser, is currently born
The current theoretical maximum degree of supercooling of condenser when lotus；
Second computing unit, for according to the current theoretical maximum degree of supercooling and at full capacity when condenser target mistake at full capacity
Cold degree, the current goal degree of supercooling of condenser when current loads are calculated.
10. control device according to claim 9, which is characterized in that second computing unit is specifically used for：
The difference for calculating the saturation temperature at full capacity of condenser and inflow temperature at full capacity when at full capacity, condenses when obtaining at full capacity
The theoretical maximum degree of supercooling at full capacity of device；
The ratio for calculating the current theoretical maximum degree of supercooling and the degree of supercooling of theoretical maximum at full capacity, obtains the first load hundred
Divide ratio；
The product for calculating first load percentage and the degree of supercooling of target at full capacity obtains the current goal supercooling
Degree.
11. control device according to claim 8, which is characterized in that the adjustment module is specifically used for：
The difference for calculating the current leaving water temperature and current inflow temperature of condenser, obtain condenser when current loads when advance
Temperature difference of outlet water；
The difference for calculating the leaving water temperature at full capacity of condenser and inflow temperature at full capacity under rated designs operating mode, obtains specified set
Count the specified disengaging water temperature difference of condenser under operating mode；
The ratio for calculating current the disengaging water temperature difference and the specified disengaging water temperature difference, obtains the second load percentage；
Calculate second load percentage at full capacity when condenser the degree of supercooling of target at full capacity product, obtain described work as
Preceding target degree of supercooling.
12. control device according to claim 8, which is characterized in that the adjustment module includes：
Amending unit is modified the current goal degree of supercooling for currently running pressure ratio according to handpiece Water Chilling Units；
Unit is adjusted, for according to the revised current goal degree of supercooling, the level-one throttle valve to be adjusted.
13. control device according to claim 12, which is characterized in that the amending unit is specifically used for：
The ratio for calculating current the operation pressure ratio and specified operation pressure ratio, obtains correction factor；
The product for calculating the correction factor and the current goal degree of supercooling obtains the revised current goal mistake
Cold degree.
14. control device according to claim 8, which is characterized in that the adjustment module is specifically used for：
If the current goal degree of supercooling is less than preset minimum target degree of supercooling threshold value, according to the minimum target degree of supercooling
The level-one throttle valve is adjusted in threshold value；
If the current goal degree of supercooling is more than preset maximum target degree of supercooling threshold value, according to the maximum target degree of supercooling
The level-one throttle valve is adjusted in threshold value；
If the current goal degree of supercooling is equal to or more than the minimum target degree of supercooling threshold value, and equal to or less than described
Maximum target degree of supercooling threshold value is adjusted the level-one throttle valve then according to the current goal degree of supercooling.
15. a kind of two stage centrifugal handpiece Water Chilling Units, which is characterized in that including：As claim 8-14 any one of them twin-stage from
The control device of heart handpiece Water Chilling Units level-one throttling.
16. a kind of electronic equipment, which is characterized in that including：It memory, processor and is stored on the memory and can be in institute
The computer program run on processor is stated, the processor executes described program, to realize such as any one of claim 1-7 institutes
The control method for the two stage centrifugal handpiece Water Chilling Units level-one throttling stated.
17. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer program, which is characterized in that the program
It is executed by processor, for realizing the control such as the throttling of claim 1-7 any one of them two stage centrifugal handpiece Water Chilling Units level-ones
Method processed.
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| CN201810713890.9A CN108800634B (en) | 2018-06-29 | 2018-06-29 | Two-stage centrifugal water chilling unit and one-stage throttling control method and device thereof |
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| CN110360780A (en) * | 2019-07-23 | 2019-10-22 | 珠海格力电器股份有限公司 | Multi-line system and its degree of supercooling determine method, apparatus and equipment, storage medium |
| CN113075259A (en) * | 2021-03-24 | 2021-07-06 | 新奥数能科技有限公司 | Real-time monitoring method and device for condensation approaching temperature of electric refrigerator |
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| CN108800634B (en) | 2020-11-24 |
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