CN109373654A - A kind of progress control method of water cooler or heat pump unit - Google Patents
A kind of progress control method of water cooler or heat pump unit Download PDFInfo
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- CN109373654A CN109373654A CN201811221330.8A CN201811221330A CN109373654A CN 109373654 A CN109373654 A CN 109373654A CN 201811221330 A CN201811221330 A CN 201811221330A CN 109373654 A CN109373654 A CN 109373654A
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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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Abstract
The invention discloses the progress control method of a kind of water cooler or heat pump unit, unit includes monoblock that is multiple in parallel and containing 2~4 compressors.Progress control method step are as follows: acquiring unit unit total load, every compressor load and monoblock operating load.The sequence of default monoblock, presets load or off-load condition.When operation, based on predetermined order, first resequence by monoblock operating load value, then the monoblock equal with sequence first unit unit operating load value is selected, it resequences again by every compressor load value, select the monoblock equal with first every compressor load of sequence at this time, it is ranked up again by runing time, the monoblock of sequence first is the load or off-load target under corresponding sequence at this time, progress control method of the invention can replace to be loaded the compressor of monoblock or off-load is to realize balanced dispersion operation one by one, avoid leaving water temperature too low, it meets customer need.
Description
Technical field
The invention belongs to water coolers or heat pump unit to run control technology field, more particularly to a kind of suitable for refrigeration
When, the progress control method of water outlet control model, the water cooler in the case of multicomputer joint control or heat pump unit.
Background technique
Common water cooler or heat pump unit uses multicomputer joint control strategy, i.e. water cooler includes multiple and through transport
Capable monoblock, the usually only single refrigeration mode of each monoblock, mainly include 2~4 compressors, condenser,
Throttle part and evaporator, refrigerant one-way flow in evaporator and condenser；Or heat pump unit includes multiple parallel connections
The monoblock of operation, each monoblock mainly include 2~4 compressors, condenser, throttle part, evaporator and four-way
Reversal valve realizes the conversion of refrigeration or heating mode by the switching of four-way reversing valve.
Either all there are two types of control models for water cooler or heat pump unit, using total return water set temperature returning as target
Water management mode (when refrigeration default 12 DEG C) and (7 are defaulted when refrigeration as the water outlet control model of target to be always discharged set temperature
℃)；Total return water temperature refers to that main pipe rail return water temperature, total leaving water temperature refer to the mixed temperature of each unit unit leaving water temperature
Degree.
The operation control of water cooler or heat pump unit in the prior art, when executing load, first to a monoblock
It is loaded, until after 100% full-load run of monoblock (i.e. contained compressor is all run), then to another unit machine
Group is loaded；When off-load, off-load first is carried out to a monoblock, until (contained compressor is complete after monoblock shutdown
Portion is out of service), then off-load is carried out to another monoblock；So-called load is to instigate the compressor start fortune of a stopping
Row, so-called off-load are to instigate the compressor of an operation out of service.With monoblock for 8, each monoblock has 4 pressures
For contracting machine, illustrate it is above-mentioned existing plus, Control of decreasing load unit operation reserve the shortcomings that easily occurring.When refrigeration, backwater control mode
Under, it is arranged 12 DEG C of temperature with total return water as target, adds, off-load compressor.All monoblock whole full-load runs when load is big,
See Fig. 1.The only 1# monoblock full-load run of load hour, is shown in Fig. 2.It can be found that being not in that leaving water temperature is too low from Fig. 2
(each monoblock leaving water temperature is less than 3 DEG C) phenomenon.It when refrigeration, is discharged under control model, being arranged 7 DEG C of temperature with total water outlet is
Target adds, off-load compressor.All monoblock whole full-load runs, are shown in Fig. 1 when load is big.Load hour only 1# unit machine
Group full-load run, is shown in Fig. 3, too low (2.6 DEG C of leaving water temperature, 3 DEG C of the < of the 1# monoblock) phenomenon of leaving water temperature occurs；For upper
State problem, general solution be improve total water outlet setting temperature, but this method will cause be unable to satisfy 7 DEG C of water outlets of user need to
It asks, or leaving water temperature alarming value is reduced, but leaving water temperature is too low be easy to cause that pipeline freezes and to influence unit subsequent just
Often operation.
To Fig. 1, into Fig. 3, the calculating of monoblock leaving water temperature value is illustrated: when monoblock full-load run, unit
Refrigeration temperature difference theoretical value is 5 DEG C (total return water temperature and monoblock leaving water temperature difference are 5 DEG C).When monoblock is shut down, machine
Group refrigeration temperature difference theoretical value is 0 DEG C (total return water temperature is equal to monoblock leaving water temperature)；Monoblock is with full load
75%, the operation such as 50% or 25%, refrigeration temperature difference gradually becomes smaller, for purposes of illustration only, the approximation of calculating temperature difference in proportion, than
When such as 50% operation, refrigeration temperature difference is 5 DEG C of theoretical value and is equal to 2.5 DEG C multiplied by 50%.Accordingly in Fig. 2,1# monoblock is fully loaded
Operation, other monoblocks are shut down, and total leaving water temperature is set as Y, and total return water temperature is 12 DEG C of set temperature, and 1# monoblock goes out
Coolant-temperature gage is 7 DEG C, is obtained according to formula Y=(12-5+12 × 7)/8, total leaving water temperature Y is about 11.4 DEG C；In Fig. 3,1# unit
Unit full-load run, other monoblocks are shut down, and total return water temperature is set as X, and total leaving water temperature is 7 DEG C of set temperature, 1# unit
The leaving water temperature of unit is X-5, show that total return water temperature X is about 7.6 DEG C, 1# unit machine according to formula ((X-5)+7X)/8=7
The leaving water temperature of group is 2.6 DEG C.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the technical problem to be solved by the invention is to provide one kind
For the progress control method of water cooler or heat pump unit, it can be achieved that the balanced dispersion of unit is run, avoidable leaving water temperature is too low,
It meets customer need.
In order to solve the above technical problems, the technical scheme adopted by the invention is that: a kind of water cooler or heat pump unit
Progress control method, the water cooler or the heat pump unit include multiple monoblocks, and multiple monoblocks are simultaneously
Through transport row, each monoblock include 2~4 compressors, and the control method is for alternately to the monoblock
In the compressor loaded one by one, off-load is to realize balanced dispersion operation, the control method the following steps are included:
S1, by the least common multiple 12 of the number of compressors 2,3,4, be calculated as monoblock total load；Calculate the list
The ratio of number of compressors described in first unit total load and the monoblock, is calculated as every compressor load；Calculate the list
The product of the operation quantity of compressor described in every compressor load described in first unit and the monoblock, is calculated as unit machine
Group operating load.
S2, the sequence of multiple monoblocks is set in advance.
S3, the load for presetting the water cooler or the heat pump unit, off-load condition；It is held when meeting the loading environment
Row step S4 executes step S5 when meeting the off-load condition.
When S4, the water cooler or the heat pump unit are run, it is based on the preset sequence of step S2, according to described
Monoblock operating load value is ascending to resequence to the monoblock；
Choose all monoblocks equal with the monoblock operating load value of sequence first at this time；
To the unit machine chosen according to corresponding every ascending rearrangement of compressor load；
Choose all monoblocks equal with every compressor load of sequence first at this time；
To the monoblock chosen according to the corresponding ascending rearrangement of unit runing time；
The monoblock of sequence first is load target at this time；
When S5, the water cooler or the heat pump unit are run, it is based on the preset sequence of step S2, according to described
Monoblock operating load value is descending to resequence to the monoblock；
Choose all monoblocks equal with the monoblock operating load value of sequence first at this time；
To the unit machine chosen according to corresponding every ascending rearrangement of compressor load；
Choose all monoblocks equal with every compressor load of sequence first at this time；
To the monoblock chosen according to the corresponding descending rearrangement of unit runing time；
The monoblock of sequence first is off-load target at this time.
It is preferred in the above-mentioned technical solutions, preset in the step S3 water cooler or the heat pump unit plus
It carries, off-load condition specifically includes:
When refrigeration, load, the off-load condition of the water cooler or the heat pump unit are preset in the case where being discharged control model；
It specifically includes and the first load preset value is greater than with total leaving water temperature of the water cooler of real-time detection or the heat pump unit
As the loading environment, subtracted with total leaving water temperature of the water cooler of real-time detection or the heat pump unit less than first
Preset value is carried as the off-load condition.
Alternatively, presetting load, the off-load of the water cooler or the heat pump unit under backwater control mode when refrigeration
Condition；It specifically includes and the second load is greater than in advance with total return water temperature of the water cooler of real-time detection or the heat pump unit
If value is less than with as the loading environment with total return water temperature of the water cooler of real-time detection or the heat pump unit
Second off-load preset value is as the off-load condition.
Preferred in the above-mentioned technical solutions, the first load preset value is equal to total leaving water temperature preset value and default control
The sum of the temperature difference processed；The first off-load preset value is equal to the difference of total leaving water temperature preset value and the default control temperature difference；
The second load preset value be equal to total return water preset value and the default control temperature difference and；Described second off-load preset value etc.
In the difference of total return water temperature preset value and the default control temperature difference.
In the above-mentioned technical solutions preferably, when refrigeration, total leaving water temperature preset value is 7 DEG C, total return water temperature
Spending preset value is 12 DEG C, and the control temperature difference is 1 DEG C.
In the above-mentioned technical solutions preferably, when refrigeration, the water cooler or the heat pump unit include described in 8
Monoblock, each monoblock includes 4 compressors, and the runing time of 8 monoblocks is
T。
8 monoblocks are respectively 1# monoblock~8# monoblock.
1# monoblock, 2# monoblock, 3# monoblock, 4# are set as to the sequence of 8 monoblocks in advance
Monoblock, 5# monoblock, 6# monoblock, 7# monoblock, 8# monoblock.
In the above-mentioned technical solutions preferably, when refrigeration, the water cooler or the heat pump unit include described in 4
Monoblock, 4 monoblocks are respectively 1# monoblock~4# monoblock.
The 1# monoblock includes 3 compressors, and the 2# monoblock includes 2 compressors, described
3# monoblock and the 4# monoblock include 4 compressors, and the runing time of the 1# monoblock is T,
The runing time of the 2# monoblock is T+1, and the runing time of the 3# monoblock is T+3, the 4# monoblock
Runing time is T+2.
1# monoblock, 2# monoblock, 3# monoblock, 4# are set as to the sequence of 4 monoblocks in advance
Monoblock.
After above-mentioned technical proposal, the beneficial effects of the present invention are:
Operation control of the invention when executing load or off-load, be no longer " first to a monoblock carry out load or
Off-load, until after the monoblock full-load run or shutdown, then load or off-load are carried out to another monoblock "；But it presses
According to the load of step S4, S5, off-load method alternately load the compressor in different units unit one by one, off-load is to realize
Equilibrium dispersion runs and reaches energy saving purpose, meets customer need；
It especially in refrigeration, is discharged under control model, which is the water temperature out that can guarantee user demand
Degree, and can effectively avoid individual unit unit full-load run, other monoblocks running unit machine caused when out of service
The phenomenon that group leaving water temperature is low, and unit pipeline freezes.
Detailed description of the invention
When Fig. 1 is existing refrigeration, under return water or water outlet control model, water outlet when 8 monoblock whole full-load run
Temperature schematic diagram；
When Fig. 2 is existing refrigeration, under backwater control mode, 1# monoblock full-load run, when other monoblocks are shut down
Leaving water temperature schematic diagram；
It when Fig. 3 is existing refrigeration, is discharged under control model, 1# monoblock full-load run, when other monoblocks are shut down
Leaving water temperature schematic diagram；
Fig. 4 is the exemplary flow in the progress control method of water cooler or heat pump unit of the present invention when meeting loading environment
Figure；
Fig. 5 is the exemplary flow in the progress control method of water cooler or heat pump unit of the present invention when meeting off-load condition
Figure；
Fig. 6 is the first of the invention embodiment, when refrigeration, under backwater control mode, and the equal 25% load fortune of 4 monoblocks
Row, leaving water temperature schematic diagram when remaining 4 monoblocks are shut down；
Fig. 7 is the first of the invention embodiment, when refrigeration, is discharged under control model, the equal 25% load fortune of 4 monoblocks
Row, leaving water temperature schematic diagram when remaining 4 monoblocks are shut down；
Fig. 8 is second of embodiment of the invention, when refrigeration, under backwater control mode, 4 monoblocks respectively with
33.3%, 50%, 25%, leaving water temperature schematic diagram when 25% load operation；
Fig. 9 is second of embodiment of the invention, when refrigeration, is discharged under control model, 4 monoblocks respectively with
33.3%, 50%, 25%, leaving water temperature schematic diagram when 25% load operation.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawings and examples
Progress control method of the present invention is described in detail.
Embodiment one:
Water cooler or heat pump unit include 8 monoblocks, 8 monoblock parallel runnings, each monoblock
It include 4 compressors, the runing time of 8 monoblocks is T, T=2；8 monoblocks be respectively 1# monoblock,
2# monoblock, 3# monoblock, 4# monoblock, 5# monoblock, 6# monoblock, 7# monoblock, 8# monoblock.
Progress control method of the present invention for alternately the compressor in 8 monoblocks is loaded one by one, off-load with
Realize balanced dispersion operation, progress control method the following steps are included:
The least common multiple 12 of S1, the quantity 2,3,4 that can choose compressor, are calculated as monoblock total load；It calculates
The ratio of number of compressors, is calculated as every compressor load in monoblock total load and monoblock；It is every in computing unit unit
The product of compressor operation quantity, is calculated as monoblock operating load in compressor load and the monoblock.
S2, the sequence of multiple monoblocks is set in advance, i.e., 1# is set as to the sequence of 8 monoblocks in advance
Monoblock, 2# monoblock, 3# monoblock, 4# monoblock, 5# monoblock, 6# monoblock, 7# monoblock, 8#
Monoblock, for ease of description design of the invention number ascending sequence by it to the sequence of 8 monoblocks,
It can be other sequences.
Load, the off-load condition of S3, default water cooler or heat pump unit；Step S4 is executed when meeting loading environment, it is full
Step S5 is executed when sufficient off-load condition.
As shown in figure 4, when water cooler or heat pump unit are run, step S4 specifically includes the following steps:
A, it is based on the preset sequence of step S2, monoblock is arranged again according to monoblock operating load value is ascending
Sequence.Encountered when sequence value it is equal when do not exchange position, i.e., do not change former order, specific sort method is those skilled in the art institute
Well known, this will not be repeated here.(such as preset it is ordered as A=5, B=5, C=3, D=4；It is ordered as by numerical value is descending
A=5, B=5, D=4, C=3；C=3, D=4, A=5, B=5 are ordered as by numerical value is ascending).
B, choose all monoblocks equal with the monoblock operating load value of sequence first in step a.
C, value is equally encountered according to the ascending rearrangement of every compressor load to the monoblock chosen in step b
Position is not exchanged when equal, i.e., does not change former order.
D, choose all monoblocks equal with every compressor load of sequence first in step c.
E, the monoblock chosen in step d is equally encountered according to its ascending rearrangement of unit runing time
Position is not exchanged when being worth equal, i.e., does not change former order.
F, the monoblock of sequence first is load target in step e at this time.
If after having loaded a compressor, also meeting loading environment (reference can be made to table one), returns again to step a and enter next round
Loaded cycle (enters until being unsatisfactory for loading environment and meets holding condition or off-load condition etc., be shown in Table one), above-mentioned steps are constituted
Loaded cycle terminate, wherein loading cycle can be defaulted as 90 seconds.
As shown in figure 5, when water cooler or heat pump unit are run, step S5 specifically includes the following steps:
H, it is based on the preset sequence of step S2, monoblock is arranged again according to monoblock operating load value is descending
Sequence.Equally encounter value it is equal when do not exchange position, i.e., do not change former order.
I, choose all monoblocks equal with the monoblock operating load value of sequence first in step h.
J, to the monoblock chosen in step i according to the ascending rearrangement of every compressor load.Equally encounter value
Position is not exchanged when equal, i.e., does not change former order.
K, choose all monoblocks equal with every compressor load of sequence first in step j.
L, to the monoblock chosen in step k according to its descending rearrangement of unit runing time.Equally encounter
Position is not exchanged when being worth equal, i.e., does not change former order.
M, the monoblock of sequence first is off-load target in step l at this time.
If also meeting off-load condition (reference can be made to table one) after the complete compressor of off-load, returns again to step h and enter next round
Off-load circulation, until being unsatisfactory for off-load condition, the off-load loop termination that above-mentioned steps are constituted, wherein the off-load period can be defaulted as 30
Second, if reducing the off-load period 30 seconds to 5 seconds into emergency stop condition is met.
Wherein: water cooler is preset in step S3 or the load of heat pump unit, off-load condition specifically include:
When refrigeration, load, the off-load condition of water cooler or heat pump unit are preset in the case where being discharged control model；It specifically includes
It is greater than the first load preset value as loading environment, with reality using total leaving water temperature of the water cooler of real-time detection or heat pump unit
When total leaving water temperature of water cooler or heat pump unit for detecting less than the first off-load preset value as off-load condition.
Alternatively, presetting load, the off-load condition of water cooler or heat pump unit under backwater control mode when refrigeration；Tool
Body include be greater than using total return water temperature of the water cooler of real-time detection or heat pump unit the second load preset value with as load
Condition, using total return water temperature of the water cooler of real-time detection or heat pump unit less than the second off-load preset value as off-load item
Part.
First load preset value be equal to total leaving water temperature preset value and the default control temperature difference and；First off-load preset value etc.
In the difference of total leaving water temperature preset value and the default control temperature difference；Second load preset value is equal to total return water preset value and default control
The sum of the temperature difference；Second off-load preset value is equal to the difference of total return water temperature preset value and the default control temperature difference.
The embodiment of the present invention one in order to clearly illustrate load, off-load condition it is default, additionally provide water cooler or
Heat pump unit load, off-load condition parameter setting table, as shown in Table 1.Wherein the design parameter in table is merely exemplary,
It is applicable for not only having these numerical value.
Table one
Above-mentioned steps are described in detail with specific embodiment below:
The embodiment of the present invention one additionally provides " monoblock total load=12, every compressor load=12/4=3, unit
Meet loading environment after runing time=2 " bootings, the compressor in 8 monoblocks is chosen by the data that step S4 executes load
Table is selected, as shown in Table 2.
Wherein the specific data in table are also merely exemplary, and not shall be limited only to the extent these numerical value, and only schematical column
Go out from 8 monoblock whole shutdown status and has been loaded onto 1 compressor operation in 1# monoblock (25% operation), 2# one by one
Compressor operation (25% operation) in monoblock, compressor operation (25% operation), 4# are mono- in 3# monoblock
First one compressor of unit operation (25% operation), the load target election process for the state that remaining 4 monoblocks are still shut down.
Table two
When monoblock full-load run, unit refrigeration temperature difference theoretical value is 5 DEG C, and (total return water temperature and monoblock go out water temperature
Spending difference is 5 DEG C).When monoblock is shut down, unit refrigeration temperature difference theoretical value is 0 DEG C, and (total return water temperature goes out equal to monoblock
Coolant-temperature gage)；When monoblock is with the operation such as the 75% of full load, 50%, 33.3%, 25%, refrigeration temperature difference is gradually become smaller,
Convenient for citing, the in proportion approximation of calculating temperature difference, for example when 25% operation, refrigeration temperature difference is 5 DEG C of theoretical value multiplied by 25%
Equal to 1.25 DEG C.
If above-mentioned load step is executed under backwater control mode, that is, the loading environment met is backwater control mode
Under preset loading environment；Preceding equal 25% operation of 4 monoblocks, leaving water temperature such as Fig. 6 when remaining 4 monoblocks are shut down
It is shown；Total leaving water temperature is about 11.4 DEG C, and the leaving water temperature of 25% running unit unit is approximately 10.8 DEG C, shuts down monoblock
Leaving water temperature is 12 DEG C.
The calculating process of temperature value: total leaving water temperature is set as Y, and total return water temperature is 12 DEG C of set temperature, 1# unit machine
Group -4# monoblock leaving water temperature is 10.8 DEG C of 12-5/4 ≈, is obtained according to formula Y=(10.8 × 4+12 × 4)/8, always
Leaving water temperature Y is about 11.4 DEG C.
If above-mentioned load step is executed in the case where being discharged control model, that is, the loading environment met is in water management mould out
Preset loading environment under formula；Preceding equal 25% operation of 4 monoblocks, leaving water temperature when remaining 4 monoblocks are shut down is such as
Shown in Fig. 7；Total return water temperature is about 7.6 DEG C, and the leaving water temperature of the monoblock of 25% operation is 6.4 DEG C, shuts down monoblock
Leaving water temperature be 7.6 DEG C.
The calculating process of temperature value: total return water temperature is set as X, and total leaving water temperature is 7 DEG C of set temperature, 1# monoblock-
The leaving water temperature of 4# monoblock is X-5/4, show that total return water temperature X is about 7.6 according to formula ((X-5/4)+7X)/8=7
DEG C, 1# monoblock -4# monoblock leaving water temperature is about 6.4 DEG C.
By Fig. 6 and Fig. 2, it is found that each monoblock temperature difference is little, total output is the same, does not have for the comparison of Fig. 7 and Fig. 3
Occurs the too low phenomenon of leaving water temperature again.The leaving water temperature under any state of unit can be illustrated according to above-mentioned calculation formula,
This is without enumerating again.
Embodiment two:
Embodiment two and the design of embodiment one are essentially identical, it is unique unlike, quantity, the monoblock of monoblock
The setting of the quantity of middle compressor and unit runing time is different, is illustrated below only for distinctive points to the present embodiment.
Water cooler or heat pump unit include 4 monoblocks, and 4 monoblocks are respectively 1# monoblock, 2# mono-
First unit, 3# monoblock, 4# monoblock；1# monoblock includes 3 compressors, every compressor machine load=4；2# unit
Unit includes 2 compressors, every compressor machine load=6；3# monoblock and 4# monoblock include 4 compressors, often
Compressor machine load=3, and the runing time of 1# monoblock is T=2, the runing time of 2# monoblock is T+1=3,3#
The runing time of monoblock is T+3=5, and the runing time of 4# monoblock is T+2=4；In advance to the row of 4 monoblocks
Sequence is set as 1# monoblock, 2# monoblock, 3# monoblock, 4# monoblock.Design of the invention for ease of description,
Ascending sequence is numbered by it to the sequence of 4 monoblocks, is also possible to other sequences.
Loaded cycle step and off-load circulation step describe completely the same with embodiment one, and this will not be repeated here, is detailed in
Fig. 4 and Fig. 5.
The embodiment of the present invention two additionally provides " every compressor machine load of monoblock total load=12,1# monoblock
=4 (being equivalent to 33.3%)；Every compressor machine load=6 (being equivalent to 50%) of 2# monoblock；3# monoblock and 4# are mono-
Every compressor machine load=3 (being equivalent to 25%) of first unit, unit runing time be respectively 2,3,5,4 " booting after meet plus
Carrier strip part, the compressor in 4 monoblocks select table by the data that step S4 executes load, as shown in Table 3.
Wherein the specific data in table are also merely exemplary, and not be shall be limited only to the extent these numerical value, are only schematically listed
It chooses from the load target that 4 monoblock whole shutdown status are loaded onto 4 monoblock whole full-load run states one by one
Select process.
Table three
Citing narration is carried out with the 9th row data in table three: the current set state shown by the sequence of default monoblock
Are as follows: 1# monoblock has the operation of 2 compressors at this time, and monoblock operating load is 8；2# monoblock has 1 compressor fortune
Row, monoblock operating load are 6；3# monoblock has the operation of 2 compressors, and monoblock operating load is 6；4# unit machine
Group has the operation of 2 compressors, and monoblock operating load is 6；Unit at this time meets loading environment, walks into loaded cycle
Suddenly, 2# monoblock, 3# monoblock, 4# monoblock, 1# monoblock are ordered as after executing step a；After executing step b
Pick out 2# monoblock, 3# monoblock, 4# monoblock；3# monoblock, 4# unit machine are ordered as after executing step c
Group, 2# monoblock；3# monoblock, 4# monoblock are picked out after executing step d；After executing step e to be ordered as 4# mono-
First unit, 3# monoblock load target at this time and determine that when load preferentially loads the compressor in 4# monoblock.
If above-mentioned load step is executed under backwater control mode, that is, the loading environment met is backwater control mode
Under preset loading environment；4 monoblocks are respectively with 33.3%, 50%, 25%, 25% load operation (each monoblock
Run a compressor) leaving water temperature it is as shown in Figure 8；Total leaving water temperature is about 10.4 DEG C, the leaving water temperature of 1# monoblock
It is 10.3 DEG C, the leaving water temperature of 2# monoblock is 9.5 DEG C, 10.8 DEG C of the leaving water temperature of 3# monoblock, 4# monoblock
Leaving water temperature is 10.8 DEG C.
The calculating process of temperature value: total leaving water temperature is set as Y, and total return water temperature is 12 DEG C of set temperature, 1# unit machine
Group -4# monoblock leaving water temperature is respectively 10.3 DEG C of 12-5/3 ≈；12-5/2≈9.5℃；12-5/4≈10.8℃,12-
5/4 10.8 DEG C of ≈ show, total leaving water temperature Y is about 10.4 DEG C according to formula Y=(10.3+9.5+10.8 × 2)/4.
If above-mentioned load step is executed in the case where being discharged control model, that is, the loading environment met is in water management mould out
Preset loading environment under formula；4 monoblocks are respectively with 33.3%, 50%, 25%, 25% load operation (each unit machine
Group operation one compressor) leaving water temperature it is as shown in Figure 9；Total return water temperature is about 8.7 DEG C, the leaving water temperature of 1# monoblock
It is 7 DEG C, the leaving water temperature of 2# monoblock is 6.2 DEG C, 7.5 DEG C of the leaving water temperature of 3# monoblock, the water outlet of 4# monoblock
Temperature is 7.5 DEG C.
The calculating process of temperature value: total return water temperature is set as X, and total leaving water temperature is 7 DEG C of set temperature, 1# monoblock-
The leaving water temperature of 4# monoblock is respectively X-5/3；X-5/2；X-5/4；X-5/4, according to formula (X-5/3+X-5/2+X-5/4+
X-5/4)/4=7 obtains above-mentioned temperature value.
Each monoblock temperature difference is little, does not occur the too low phenomenon of leaving water temperature again.It is public also according to above-mentioned calculating
Formula can illustrate the leaving water temperature under any state of unit, herein without enumerating.
The embodiment of the present invention two additionally provides " every compressor machine load of monoblock total load=12,1# monoblock
=4；Every compressor machine load=6 of 2# monoblock；Every compressor machine load=3 of 3# monoblock and 4# monoblock,
Unit runing time be respectively 2,3,5,4 " booting after meet off-load condition, the compressor in 4 monoblocks is held by step S5
The data of row off-load select table, as shown in Table 4.
Wherein the specific data in table are also merely exemplary, and not be shall be limited only to the extent these numerical value, are only schematically listed
It chooses from the off-load target that 4 monoblock whole full-load run states are loaded onto 4 monoblock whole shutdown status one by one
Select process.
Table four
The leaving water temperature under any state of unit can be illustrated also according to above-mentioned calculation formula, herein without one by one
It enumerates.
By above-mentioned control method, following conclusion can be gone out with direct derivation:
When each monoblock includes 2~N compressor (N >=2), monoblock total load at this time are as follows: 2 between N
It and include the least common multiple of whole integers of 2 and N.I.e. when each monoblock includes 2~6 compressors (N >=2), this
When monoblock total load are as follows: 2,3,4,5,6 between N and the least common multiple 60 of whole integers comprising 2 and N；With secondary work
For the underlying parameter that later step compares, the control for being loaded or being loaded according to above-mentioned steps.
Alternatively, each monoblock includes 2,3,4 or 6 compressors, monoblock total load at this time are as follows: 2,3,4,6
Least common multiple 24, the underlying parameter successively compared as later step, the control for being loaded or being loaded according to above-mentioned steps
System.
Water cooler or heat pump unit include the temperature sensor of controller and detection temperature value, and those skilled in the art can
According to the Rule of judgment of above-mentioned steps and table one, corresponding program, the temperature that temperature sensor will test are write in controller
Value is uploaded to controller, and controller is based on temperature signal, executes above-mentioned steps by the program write and carries out adding one by one for compressor
Load or off-load；The conversion between method and program is not repeated herein.
To sum up, operation of the invention control is no longer " first to add to a monoblock when executing load or off-load
Load or off-load, until after the monoblock full-load run or shutdown, then load or off-load are carried out to another monoblock "；And
Be alternately the compressor in different units unit is loaded one by one according to the load of step S4 and step S5, off-load method,
Off-load is met customer need with realizing balanced dispersion operation and reaching energy saving purpose.Suitable for refrigeration when, be discharged control model or
Operation control under backwater control mode；When progress control method of the invention can also be applied to heating by heat pump unit, out
Operation control under water management mode or backwater control mode.
It especially in refrigeration, is discharged under control model, progress control method of the invention is compared to tradition operation controlling party
The advantages of method, is more prominent.I.e. the progress control method is the leaving water temperature that can guarantee user demand, and can effectively be avoided single
Monoblock full-load run, other monoblocks running unit unit leaving water temperature caused when out of service are low, unit pipe
The phenomenon that road freezes.
The above is presently preferred embodiments of the present invention, is not intended to restrict the invention, for the technology of this field
For personnel, the invention may be variously modified and varied.Any modification done within the spirit and principles of the present invention
And improvement, it should all be included in the protection scope of the present invention.
Claims (6)
1. the progress control method of a kind of water cooler or heat pump unit, the water cooler or the heat pump unit include more
A monoblock, multiple monoblock parallel runnings, each monoblock includes 2~4 compressors, feature
Be, the progress control method for alternately the compressor in the monoblock is loaded one by one, off-load with
Realize balanced dispersion operation, the progress control method the following steps are included:
S1, by the least common multiple 12 of the number of compressors 2,3,4, be calculated as monoblock total load；Calculate the unit machine
The ratio of number of compressors described in group total load and the monoblock, is calculated as every compressor load；Calculate the unit machine
The product of the operation quantity of compressor described in every compressor load described in group and the monoblock, is calculated as monoblock fortune
Row load；
S2, the sequence of multiple monoblocks is set in advance；
S3, the load for presetting the water cooler or the heat pump unit, off-load condition；Step is executed when meeting the loading environment
Rapid S4 executes step S5 when meeting the off-load condition；
When S4, the water cooler or the heat pump unit are run, it is based on the preset sequence of step S2, according to the unit
Unit operating load value is ascending to resequence to the monoblock；
Choose all monoblocks equal with the monoblock operating load value of sequence first at this time；
To the unit machine chosen according to corresponding every ascending rearrangement of compressor load；
Choose all monoblocks equal with every compressor load of sequence first at this time；
To the monoblock chosen according to the corresponding ascending rearrangement of unit runing time；
The monoblock of sequence first is load target at this time；
When S5, the water cooler or the heat pump unit are run, it is based on the preset sequence of step S2, according to the unit
Unit operating load value is descending to resequence to the monoblock；
Choose all monoblocks equal with the monoblock operating load value of sequence first at this time；
To the unit machine chosen according to corresponding every ascending rearrangement of compressor load；
Choose all monoblocks equal with every compressor load of sequence first at this time；
To the monoblock chosen according to the corresponding descending rearrangement of unit runing time；
The monoblock of sequence first is off-load target at this time.
2. the progress control method of water cooler as described in claim 1 or heat pump unit, which is characterized in that the step S3
In preset the load of the water cooler or the heat pump unit, off-load condition specifically includes:
When refrigeration, load, the off-load condition of the water cooler or the heat pump unit are preset in the case where being discharged control model；Specifically
Including using total leaving water temperature of the water cooler of real-time detection or the heat pump unit be greater than first load preset value as
The loading environment, it is pre- less than the first off-load with total leaving water temperature of the water cooler of real-time detection or the heat pump unit
If value is used as the off-load condition；
Alternatively, presetting load, the off-load item of the water cooler or the heat pump unit under backwater control mode when refrigeration
Part；It specifically includes default greater than the second load with total return water temperature of the water cooler of real-time detection or the heat pump unit
Value with as the loading environment, with total return water temperature of the water cooler of real-time detection or the heat pump unit less than the
Two off-load preset values are as the off-load condition.
3. the progress control method of water cooler as claimed in claim 2 or heat pump unit, which is characterized in that described first adds
Carry preset value be equal to total leaving water temperature preset value and the default control temperature difference and；The first off-load preset value always goes out equal to described
The difference of coolant-temperature gage preset value and the default control temperature difference；It is described second load preset value be equal to total return water preset value with it is described pre-
If controlling the sum of the temperature difference；The second off-load preset value is equal to total return water temperature preset value and the default control temperature difference
Difference.
4. the progress control method of water cooler as claimed in claim 3 or heat pump unit, which is characterized in that when refrigeration, institute
Stating total leaving water temperature preset value is 7 DEG C, and total return water temperature preset value is 12 DEG C, and the control temperature difference is 1 DEG C.
5. the progress control method of water cooler as claimed in claim 4 or heat pump unit, which is characterized in that when refrigeration, institute
It states water cooler or the heat pump unit includes 8 monoblocks, each monoblock includes 4 pressures
Contracting machine, and the runing time of 8 monoblocks is T；
8 monoblocks are respectively 1# monoblock~8# monoblock；
1# monoblock, 2# monoblock, 3# monoblock, 4# unit are set as to the sequence of 8 monoblocks in advance
Unit, 5# monoblock, 6# monoblock, 7# monoblock, 8# monoblock.
6. the progress control method of water cooler as claimed in claim 4 or heat pump unit, which is characterized in that when refrigeration, institute
It states water cooler or the heat pump unit includes 4 monoblocks, 4 monoblocks are respectively 1# monoblock
~4# monoblock；
The 1# monoblock includes 3 compressors, and the 2# monoblock includes 2 compressors, and the 3# is mono-
First unit and the 4# monoblock include 4 compressors, and the runing time of the 1# monoblock is T, described
The runing time of 2# monoblock is T+1, and the runing time of the 3# monoblock is T+3, the operation of the 4# monoblock
Time is T+2；
1# monoblock, 2# monoblock, 3# monoblock, 4# unit are set as to the sequence of 4 monoblocks in advance
Unit.
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| CN114413456A (en) * | 2022-01-14 | 2022-04-29 | 埃能科技(广州)有限公司 | Group control method and equipment for chilled water system of central air conditioner |
| CN115654786A (en) * | 2022-12-28 | 2023-01-31 | 北京绿建软件股份有限公司 | Method and device for automatically determining operation strategy of water chilling unit |
| EP4372296A1 (en) * | 2022-11-16 | 2024-05-22 | Guangdong Carrier Heating, Ventilation And Air Conditioning Co., Ltd. | Variable frequency air source heat pump cold water unit and parallel control method thereof |
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| CN109373654B (en) | 2020-11-06 |
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