CN104406453B - The control device of condenser on-line cleaning equipment and control method and central air-conditioning - Google Patents
The control device of condenser on-line cleaning equipment and control method and central air-conditioning Download PDFInfo
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- CN104406453B CN104406453B CN201410670760.3A CN201410670760A CN104406453B CN 104406453 B CN104406453 B CN 104406453B CN 201410670760 A CN201410670760 A CN 201410670760A CN 104406453 B CN104406453 B CN 104406453B
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Abstract
The invention discloses the control device of a kind of condenser on-line cleaning equipment and control method and central air-conditioning.The control device of this condenser on-line cleaning equipment includes: temperature sensor, for detecting the leaving condenser water temperature at leaving condenser water mouth；And controller, when the temperature gap between leaving condenser water temperature and the condensation temperature of the cold-producing medium flowing through condenser is more than or equal to the first predetermined temperature difference threshold value, send the instruction starting on-line cleaning operation to condenser on-line cleaning equipment.In accordance with the invention it is possible to by monitoring actual operation parameters realize automatically starting the operation of condenser on-line cleaning equipment, it is possible to guarantee the dirt of condenser within to a certain degree, to ensure sufficiently high heat transfer efficiency.
Description
Technical field
The present invention relates to central air conditioner system, particularly to the control of condenser on-line cleaning equipment
Device and control method.
Background technology
Along with the development of China's Development of China's Urbanization, increasing large public building and house make
Heating and refrigeration is carried out by central air conditioner system, and the fouling of the condenser in central air conditioner system
State is extremely important for the Effec-tive Function of refrigeration host computer.
Condenser i.e. outdoor heat converter.Condenser is arranged on exhaust outlet of compressor and throttling arrangement
Between (capillary or electric expansion valve).By the high temperature and high pressure gas (system discharged in compressor of air conditioner
Cryogen), enter condenser, by copper pipe and aluminium foil cooling, make cold-producing medium solidifying in cooling
During knot, pressure is constant, and temperature reduces, gas be converted into liquid.Generally, can adopt
By air-cooled (installing axial-flow type cooling fan) or water cooled heat radiating cooling means.
Due to factors such as the water quality of supplementary water and intrasystem mechanical admixtures in cooling water system, especially
It is that open cooling water system contacts in a large number with air, causes water quality unstable, produces and accumulate
A large amount of incrustation scale, dirt, microorganisms etc., form dirt, make cold on the heat exchanger tube surface of condenser
The heat transfer deterioration of condenser, efficiency reduce, the non-conductor of dirt generally heat, its thermal conductivity factor
Only 1/10th of carbon steel, and compared with the good conductor of the heat such as copper, thermal conductivity difference is bigger.
And along with the extensive application of heat transfer enhancement technology, dirtiness resistance is brighter on the impact of diabatic process
Aobvious.
Along with rising steadily of energy prices, further enhancing of environmental protection consciousness, generally
Various augmentation of heat transfer measure is used to come under the background of enhancing heat transfer, the dirt shadow to condenser
Ring the most more significantly.
At present, in order to solve the problem of dirt, the general mode using periodic cleaning, according to one
The fixed cycle, timing or manually start on-line cleaning equipment condenser is carried out.
Use conventional method cannot be best understood by the fouling condition of condenser, therefore can not carry out
Effectively control.And conventional method is also not bound with the monitoring to actual operation parameters and controls
The fouled condition of condenser.Likely dirt is a lot, but cleans the most in time.Also have
Possible dirt does not includes many, does not the most affect heat exchange, starts cleaning the most continually, cause
The waste of the energy, but also affect the properly functioning of central air conditioner system the most more or less.
Summary of the invention
A technical problem to be solved by this invention is to provide a kind of condenser on-line cleaning equipment
Control device and control method and central air conditioner system, it can be by monitoring actual motion
Parameter realizes automatically starting the operation of condenser on-line cleaning equipment, it is possible to guarantee cold
The dirt of condenser is within to a certain degree, to ensure sufficiently high heat transfer efficiency.
According to an aspect of the invention, it is provided the control of a kind of condenser on-line cleaning equipment
Device, including: temperature sensor, for detecting the leaving condenser water temperature at leaving condenser water mouth
Degree；And controller, cold at leaving condenser water temperature and the cold-producing medium flowing through condenser
When temperature gap between solidifying temperature is more than or equal to the first predetermined temperature difference threshold value, exist to condenser
Line cleaning equipment sends the instruction starting on-line cleaning operation.
Preferably, this control device can also include: communication interface, is suitable to and refrigeration host computer pair
Connect, for obtaining the condensation temperature of the cold-producing medium flowing through condenser from refrigeration host computer.
Preferably, after starting on-line cleaning operation, when the condensation that temperature sensor detects
Temperature gap between device leaving water temperature and condensation temperature is reduced to less than or equal to the second pre-constant temperature
During difference limen value, controller sends the finger stopping online cleaning operation to condenser on-line cleaning equipment
Order, the second predetermined temperature difference threshold value is less than the first predetermined temperature difference threshold value.
Preferably, this control device can also include: time set, for online to condenser
The duration of cleaning equipment execution on-line cleaning operation carries out accumulative to obtain accumulating time；With
And warning device, for sending alarm signal when accumulating time is more than or equal to scheduled time threshold value
Number, wherein, after starting on-line cleaning operation, when the condenser that temperature sensor detects
Temperature gap between leaving water temperature and condensation temperature is reduced to less than or equal to the second predetermined temperature difference
During threshold value, controller also instructs time set and is reset by accumulating time.
Preferably, this control device can also include: communication module, for setting with remotely control
For communicating, leaving condenser water temperature and condensation temperature are sent to remote control equipment, and
Receive the control instruction starting condenser on-line cleaning equipment from remote control equipment, and will control
Instruction is sent to controller.
According to another aspect of the present invention, it is provided that a kind of central air conditioner system, including: cold
Condenser；Condenser on-line cleaning equipment；And control device as above.
According to another aspect of the present invention, it is provided that the control of a kind of condenser on-line cleaning equipment
Method processed, including: obtain the leaving condenser water temperature at leaving condenser water mouth；Calculate condenser
Temperature gap between leaving water temperature and the condensation temperature of the cold-producing medium that flows through condenser；The warmest
Degree difference and the first predetermined temperature difference threshold value；And at temperature gap more than or equal to the first pre-constant temperature
During difference limen value, send the instruction starting on-line cleaning operation to condenser on-line cleaning equipment.
Preferably, this control method can also include: obtains from refrigeration host computer and flows through condenser
The condensation temperature of cold-producing medium.
Preferably, this control method can also include: when temperature gap is reduced to less than or equal to
During the second predetermined temperature difference threshold value, send to condenser on-line cleaning equipment and stop online cleaning operation
Instruction, the second predetermined temperature difference threshold value be less than the first predetermined temperature difference threshold value.
Preferably, this control method can also include: performs condenser on-line cleaning equipment
The duration of line cleaning operation carries out accumulative to obtain accumulating time；When accumulating time more than or
Alarm signal is sent during equal to scheduled time threshold value；And when temperature gap drop below or etc.
When the second predetermined temperature difference threshold value, accumulating time is reset.
In accordance with the invention it is possible to realize automatically starting condenser by monitoring actual operation parameters
The operation of on-line cleaning equipment, it is possible to guarantee the dirt of condenser within to a certain degree,
To ensure sufficiently high heat transfer efficiency.
Accompanying drawing explanation
Fig. 1 is the control device of condenser on-line cleaning equipment according to an embodiment of the invention
Schematic block diagram；
Fig. 2 is the control dress of condenser on-line cleaning equipment in accordance with another embodiment of the present invention
The schematic block diagram put；
Fig. 3 is the control method of condenser on-line cleaning equipment according to an embodiment of the invention
Indicative flowchart；
Fig. 4 is the further controlling party that can use after startup condenser on-line cleaning equipment
The indicative flowchart of method.
Detailed description of the invention
Below with reference to the accompanying drawings the control of condenser on-line cleaning equipment according to the present invention is described in detail
Device and control method and central air conditioner system.
Inventors have seen that between leaving condenser water temperature and the condensation temperature of cold-producing medium
Temperature gap can react the scaling degree of condenser.When in condenser, fouling is less, more
During cleaning, said temperature difference is less.When in condenser, fouling is more, time more unclean, on
State temperature gap bigger.
The present inventor proposes, can cold based on to leaving condenser water temperature and cold-producing medium
The monitoring result of the temperature gap between solidifying temperature decides whether to perform on-line cleaning operation.
Fig. 1 schematically shows condenser on-line cleaning according to an embodiment of the invention and sets
Standby control device.
As it is shown in figure 1, central air conditioner system is except including condenser 200, on-line cleaning equipment
300, outside refrigeration host computer 400 (and the miscellaneous equipment being shown without at this), also include controlling
Device 100.Wherein, on-line cleaning equipment 300 and control device 100 collectively form condenser
On-line cleaning system.
This control device 100 includes temperature sensor 110, controller 120 and communication interface 130.
Temperature sensor 110 is arranged at leaving condenser water mouth, is used for detecting leaving condenser water mouth
The leaving water temperature (hereinafter referred to as " leaving condenser water temperature ") at place.
Temperature sensor 110 can be pipeline plug-in water temperature sensor, such as Pt100,
Pt1000, NTC or other kinds of pipeline plug-in water temperature sensor, is inserted in leaving condenser water
In water pipe at Kou.
Communication interface 130 is connected to refrigeration host computer 400, for obtaining stream from refrigeration host computer 400
Crossing the condensation temperature of the cold-producing medium of condenser, condensation temperature is condenser operational factor.
It will be understood by those skilled in the art that condensation temperature can also be achieved other ways.
Such as can be pre-stored in controller 120 or other memory.Or, it is also possible to real
Time measure condensation temperature.Those skilled in the art it is understood that the acquisition mode of condensation temperature,
This is not repeating.
Controller 120 according to (from temperature sensor 110) leaving condenser water temperature and (from
Communication interface 130) condensation temperature controls the unlatching of on-line cleaning equipment 300.
Temperature gap between leaving condenser water temperature and condensation temperature is pre-more than or equal to first
During fixed difference difference threshold value, it is believed that the dirt in the heat-exchange system of condenser too much, to such an extent as to
Have impact on heat exchange efficiency, need to start on-line cleaning equipment 300.
First predetermined temperature difference threshold value is more corresponding to the dirt in condenser, and condenser cleans not
State under, the number that the temperature gap between leaving condenser water temperature and condensation temperature will present
Value.
Now, controller 120 can send instruction, on-line cleaning to on-line cleaning equipment 300
Equipment 300 starts, and starts condenser 200 is carried out on-line cleaning operation.
By monitoring leaving condenser water temperature, thus monitor leaving condenser water temperature and condensation temperature
Between temperature gap, judge the dirt in condenser 200 the most more to need clean
Degree, and when temperature gap is more than or equal to the first predetermined temperature difference threshold value, start online clear
Wash operation, enabling automatically control condenser on-line cleaning equipment 300 and start when necessary
Line cleaning operation.
After starting on-line cleaning operation, can be by operating personnel according to the operation monitored in real time
Parameter, such as leaving condenser water temperature etc., decide whether and when stop online cleaning operation.
Or, it is also possible to the stopping of online cleaning operation is automatically controlled by controller 120.Such as,
Temperature difference between leaving condenser water temperature and the condensation temperature that temperature sensor 110 detects
When value is reduced to less than or equal to the second predetermined temperature difference threshold value, controller 120 is online to condenser
Cleaning equipment 300 sends the instruction stopping online cleaning operation.
Second predetermined temperature difference threshold value is less than the first predetermined temperature difference threshold value.Second predetermined temperature difference threshold value pair
Should be less in the dirt in condenser, under the state that condenser more cleans, leaving condenser water temperature
The numerical value that temperature gap between degree and condensation temperature will present.
The second predetermined temperature difference threshold value that condenser 200 more cleans is represented by arranging, and
It is pre-that temperature gap between leaving condenser water temperature and condensation temperature is reduced to less than or equal to second
During fixed difference difference threshold value, send and instruct to stop online cleaning operation, can be capable of automatically
On the basis of starting on-line cleaning operation, realize further being automatically stopped on-line cleaning operation, enter
One step achieves the automation of on-line cleaning operation.
By measuring leaving condenser water temperature, and according to leaving condenser water temperature and cold-producing medium
Temperature gap between condensation temperature controls condenser on-line cleaning equipment 300, can be automatic
Control the operation of condenser on-line cleaning equipment 300, it is possible to guarantee condenser 200
Dirt degree within limits, to ensure sufficiently high heat transfer efficiency.
Fig. 2 schematically shows condenser on-line cleaning in accordance with another embodiment of the present invention
The control device of equipment.
Except control device 100 as shown in Figure 1, condenser 200, on-line cleaning equipment 300,
Outside refrigeration host computer 400, central air conditioner system can also include remote control equipment 600.
Meanwhile, except temperature sensor 110 as shown in Figure 1, controller 120, communication interface
130, control device 100 and can also include time set 140, warning device 150 and communication
Module 160.
Communication module 160 communicates with remote control equipment 600, by leaving condenser water temperature
It is sent to remote control equipment 600 with condensation temperature, and opens from remote control equipment 600 reception
The control instruction of dynamic condenser on-line cleaning equipment 300, and control instruction is sent to controller
120.Thus can realize the long-range control to on-line cleaning equipment 300.
On the other hand, condenser on-line cleaning equipment 300 is performed online clear by time set 140
The duration washing operation adds up, to obtain accumulating time.
After starting on-line cleaning operation, when as it has been described above, temperature sensor 110 detects
Leaving condenser water temperature and condensation temperature between temperature gap be reduced to less than or equal to second
During predetermined temperature difference threshold value, outside instruction stops online cleaning operation, controller 120 is all right
Accumulating time is reset by instruction time set 140, in order to once perform on-line cleaning operation upper
Shi Chongxin adds up the duration of online cleaning operation.
When the accumulating time that time set 140 is accumulated by is more than or equal to scheduled time threshold value,
Warning device 150 sends alarm signal.
Scheduled time threshold value such as can reach clear based on performing on-line cleaning operation under normal circumstances
The purpose required time of dirt is arranged, such as, could be arranged to the certain of commonly required time
Multiple, such as 1.5 times or 2 times.
So, after have passed through the on-line cleaning of long duration (scheduled time threshold value), condensation
When temperature gap between device leaving water temperature and condensation temperature is the highest, it may be possible to on-line cleaning
Equipment 300 or temperature sensor 110 or miscellaneous equipment occur in that fault, it is also possible to condenser
Dirt in 200 is too much, it is difficult to clear by the on-line cleaning operation of on-line cleaning equipment 200
Wash clean.
Now, warning device 150 sends alarm signal, to remind operating personnel.Operating personnel
The dirt using other cleaning way to clean in condenser can be selected, or overhaul.
The alarm signal that warning device 150 sends can also be transmitted to remotely by communication module 160
Control equipment 600, in order to the operator performing remotely control at remote control equipment 600
Member sends alarm signal.
Or, time set 140 and warning device 150 can also be set directly at remotely control
At equipment 600.
By arranging time set 140 and warning device 150, enabling set in on-line cleaning
In the case of standby 300 can not realize cleaning target in the given time, send alarm signal in time
Number.
When warning device 150 sends alarm signal, controlling device 120 can be to on-line cleaning
Equipment 300 sends the instruction stopping online cleaning operation, thus stops online cleaning operation, etc.
The further process of personnel to be operated.Or, controlling device 120 can not also be to on-line cleaning
Equipment 300 sends the instruction stopping online cleaning operation.On-line cleaning equipment 300 continues to attempt to
Condenser 200 is carried out.
The control method of the condenser on-line cleaning equipment of the present invention is described below with reference to Fig. 3 and 4.
Fig. 3 schematically shows condenser on-line cleaning according to an embodiment of the invention and sets
The flow chart of standby control method.
In step S100, obtain the leaving condenser water temperature that leaving condenser water mouth goes out.Such as, cold
Condenser leaving water temperature can be carried out detecting obtaining by temperature sensor.
In step S150, obtain the condensation temperature of the cold-producing medium flowing through condenser.Condensation temperature can
To be obtained from refrigeration host computer by communication interface.
Condensation temperature can also be achieved other ways.Such as can measure condensation temperature in real time.
Or, it is also possible to it is pre-stored in controller or other memory.In this case,
Step S150 will be unnecessary.
It addition, the order of step S100 and step S150 also can be exchanged, can first obtain
Take condensation temperature obtain leaving condenser water temperature, or can also obtain simultaneously condensation temperature and
Leaving condenser water temperature.
It follows that in step S200, calculate the temperature between leaving condenser water temperature and condensation temperature
Degree difference.
In step S300, compare the most calculated temperature gap and first pre-
Fixed difference difference threshold value.
First predetermined temperature difference threshold value can be value set in advance.When leaving condenser water temperature and cold
When temperature gap between solidifying temperature meets or exceeds the first predetermined temperature difference threshold value, it is believed that
Dirt in condenser a lot, needs to clean.
First predetermined temperature difference threshold value is more corresponding to the dirt in condenser, and condenser cleans not
State under, the numerical value that the temperature gap between leaving condenser water temperature and condensation temperature will present.
When judging that in step S300 temperature gap is also less than the first predetermined temperature difference threshold value, return
Return step S100, continue monitoring leaving condenser water temperature.
When judging that in step S300 temperature gap has been above or equal to the first predetermined temperature difference threshold
During value, enter step S400.
In step S400, send the instruction starting on-line cleaning operation to on-line cleaning equipment.
By monitoring leaving condenser water temperature, thus monitor leaving condenser water temperature and condensation temperature
Between temperature gap, it is determined that the dirt in condenser the most more to need clean degree,
And when temperature gap is more than or equal to the first predetermined temperature difference threshold value, start on-line cleaning operation,
Make it possible to automatically control condenser on-line cleaning equipment and start on-line cleaning operation when necessary.
Fig. 4 schematically shows and can use after condenser on-line cleaning equipment starting
The flow chart of control method further.
In step S500, the duration of online cleaning operation can be added up, obtain accumulating time.
In step S550, it is judged that whether accumulating time is more than or equal to scheduled time threshold value.
Scheduled time threshold value such as can reach clear according to performing on-line cleaning operation under normal circumstances
The purpose required time of dirt is arranged, such as, could be arranged to the certain of commonly required time
Multiple, such as 1.5 times or 2 times.
After have passed through the on-line cleaning of long duration (scheduled time threshold value), condenser goes out
When temperature gap between coolant-temperature gage and condensation temperature is the highest, it is likely that occur in that fault.
For example, it may be possible to be on-line cleaning equipment or temperature sensor or miscellaneous equipment occurs in that fault, also
The dirt being probably in condenser is too much, it is difficult to operated by the on-line cleaning of on-line cleaning equipment
And clean up.
Now, in step S600, send alarm signal.In such a case, it is possible to continue to hold
Row on-line cleaning operates, until operating personnel send contrary instructions, it is also possible to stop performing online
Cleaning operation, waits that operating personnel process.
If accumulating time is also less than scheduled time threshold value, then enter step S700.
In step S700, it is judged that the temperature gap between leaving condenser water temperature and condensation temperature is
No have been lowered to less than or equal to the second predetermined temperature difference threshold value.
Second predetermined temperature difference threshold value is less than the first predetermined temperature difference threshold value.Second predetermined temperature difference threshold value pair
Should be less in the dirt in condenser, under the state that condenser more cleans, leaving condenser water temperature
The numerical value that temperature gap between degree and condensation temperature will present.
If judged in step S700, temperature gap is also not lowered to less than or equal to second
Predetermined temperature difference threshold value, then it represents that the dirt in condenser is the most more, and condenser cleans not enough.
In this case, on-line cleaning equipment continues executing with on-line cleaning operation.And this controlling party rule
Return step S500 and continue the accumulative duration performing on-line cleaning operation.
If judged in step S700, temperature gap has already decreased to pre-less than or equal to second
Fixed difference difference threshold value, then it represents that the dirt in condenser is the most less, and condenser is already sufficiently clean.
In this case, enter step S800, send to on-line cleaning equipment and stop online cleaning operation
Instruction.
On the other hand, it is also possible in step S900, accumulating time is reset, in order to upper once
Perform again to add up during on-line cleaning operation the duration of online cleaning operation.
Here, two execution sequences judging step, step S550 and step S700 can be run
Fall, it is also possible to perform simultaneously.Perform the two no matter in what order and judge step and corresponding behaviour
Make, the purpose of the present invention can be realized equally.
On the other hand, as required, it is also possible to only carry out in step S550 and step S700
Any one judges that step does not perform another and judges step.
The second predetermined temperature difference threshold value that condenser more cleans is represented by arranging, and in condensation
Temperature gap between device leaving water temperature and condensation temperature is reduced to less than or equal to the second pre-constant temperature
During difference limen value, send instruction to stop online cleaning operation, automatically can start being capable of
On the basis of on-line cleaning operation, realize being automatically stopped on-line cleaning operation further, further
Achieve the automation of on-line cleaning operation.
By accumulative execution on-line cleaning operation duration, and the cumulative time more than or etc.
Alarm signal is sent, enabling occur abnormal in on-line cleaning operation when scheduled time threshold value
Time, remind operating personnel in time, in order to operating personnel pinpoint the problems in time, and make appropriate
Process.
So far, the control having described the condenser on-line cleaning equipment according to the present invention in detail fills
Put the specific embodiment with control method and central air conditioner system.But those skilled in the art
Should be understood that and the invention is not restricted to various details described herein, but can make suitable
Amendment.Protection scope of the present invention is defined by the appended claims.
Claims (8)
1. a control device for condenser on-line cleaning equipment, including:
Temperature sensor, for detecting the leaving condenser water temperature at leaving condenser water mouth；
Controller, at described leaving condenser water temperature and the cold-producing medium flowing through described condenser
Condensation temperature between temperature gap more than or equal to the first predetermined temperature difference threshold value time, to described
Condenser on-line cleaning equipment sends the instruction starting on-line cleaning operation；
Time set, for performing on-line cleaning operation to described condenser on-line cleaning equipment
Duration carries out accumulative to obtain accumulating time；And
Warning device, for sending when described accumulating time is more than or equal to scheduled time threshold value
Alarm signal,
Wherein, start on-line cleaning operation after, when described temperature sensor detect cold
Temperature gap between condenser leaving water temperature and described condensation temperature is reduced to less than or equal to described
During the second predetermined temperature difference threshold value, described controller also instructs described time set by described accumulative use
Time reset.
Control device the most according to claim 1, also includes:
Communication interface, is suitable to dock with refrigeration host computer, flows through for obtaining from described refrigeration host computer
The condensation temperature of the cold-producing medium of described condenser.
Control device the most according to claim 1, wherein,
After starting on-line cleaning operation, the condenser detected when described temperature sensor goes out
Temperature gap between coolant-temperature gage and described condensation temperature is reduced to less than or equal to the second pre-constant temperature
During difference limen value, described controller sends to described condenser on-line cleaning equipment and stops on-line cleaning
The instruction of operation, described second predetermined temperature difference threshold value is less than described first predetermined temperature difference threshold value.
4., according to the control device in any of the one of claims 1 to 3, also include:
Communication module, for communicating with remote control equipment, by described leaving condenser water temperature
Degree and described condensation temperature are sent to described remote control equipment, and from described remote control equipment
Receive the control instruction starting described condenser on-line cleaning equipment, and described control instruction is sent out
Give described controller.
5. a central air conditioner system, including:
Condenser；
Condenser on-line cleaning equipment；And
Control device as in any of the one of Claims 1-4.
6. a control method for condenser on-line cleaning equipment, including:
Obtain the leaving condenser water temperature at leaving condenser water mouth；
The condensation temperature of the cold-producing medium calculating described leaving condenser water temperature and flow through described condenser
Between temperature gap；
Relatively described temperature gap and the first predetermined temperature difference threshold value；
When described temperature gap is more than or equal to the first predetermined temperature difference threshold value, to described condenser
On-line cleaning equipment sends the instruction starting on-line cleaning operation；
The duration that described condenser on-line cleaning equipment performs on-line cleaning operation tires out
Meter is to obtain accumulating time；
Alarm signal is sent when described accumulating time is more than or equal to scheduled time threshold value；And
When described temperature gap is reduced to less than or equal to the second predetermined temperature difference threshold value, by described
Accumulating time resets.
Control method the most according to claim 6, also includes:
The condensation temperature of the cold-producing medium flowing through described condenser is obtained from refrigeration host computer.
Control method the most according to claim 6, also includes:
When described temperature gap is reduced to less than or equal to the second predetermined temperature difference threshold value, to described
Condenser on-line cleaning equipment sends the instruction stopping online cleaning operation,
Described second predetermined temperature difference threshold value is less than described first predetermined temperature difference threshold value.
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