CN106288568A - The high voltage protective control method of central air-conditioning compressor and device - Google Patents
The high voltage protective control method of central air-conditioning compressor and device Download PDFInfo
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- CN106288568A CN106288568A CN201610586633.4A CN201610586633A CN106288568A CN 106288568 A CN106288568 A CN 106288568A CN 201610586633 A CN201610586633 A CN 201610586633A CN 106288568 A CN106288568 A CN 106288568A
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- Prior art keywords
- high voltage
- voltage protective
- compressor
- temperature
- reason
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Classifications
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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
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
Abstract
The invention discloses high voltage protective control method and the device of a kind of central air-conditioning compressor; wherein; the method includes: monitors and knows the high voltage protective condition meeting compressor, controls to stop the operation of compressor, and obtains current cold in-water temperature and cooling water leaving water temperature；According to current cold in-water temperature and cooling water leaving water temperature, determine the reason of the high voltage protective of compressor；The reason determining the high voltage protective of compressor is pointed out.The present invention solves in prior art after water chiller generation high voltage protective, and user cannot determine failure cause, and the problem being unfavorable for work efficiency improves air conditioning unit work efficiency.
Description
Technical field
The present invention relates to air-conditioning technical field, the high voltage protective in particular to a kind of central air-conditioning compressor controls
Method and device.
Background technology
The high voltage protective of existing central air-conditioning water chiller be to value corresponding to the compressor high-pressure of this system with
Set-point compares, and more than this set-point, just reports high voltage protective and stops compressor.Owing to causing the many factors of high voltage protective,
After detection meets high voltage protective condition, compressor operating will be stopped, shutting down frequently and affect user's use.
Additionally, due to simply merely report high voltage protective in prior art, user knows unit hypertonia disorderly closedown
After, it is not clear that it causes reason, or uses which kind of operation can reduce or solve unnecessary disorderly closedown, it is generally required to
Specific people carries out overhauling, is unfavorable for work efficiency.
After water chiller generation high voltage protective in correlation technique, user cannot determine failure cause, is unfavorable for work
The problem of efficiency, the most not yet proposes to efficiently solve scheme.
Summary of the invention
The invention provides high voltage protective control method and the device of a kind of central air-conditioning compressor, existing at least to solve
In technology after water chiller generation high voltage protective, user cannot determine failure cause, the problem being unfavorable for work efficiency.
For solving above-mentioned technical problem, according to an aspect of disclosure embodiment, the invention provides a kind of central hollow
Adjusting the high voltage protective control method of compressor, the method includes: monitors and knows the high voltage protective condition meeting compressor, controls to stop
The only operation of compressor, and obtain current cold in-water temperature and cooling water leaving water temperature；According to current cooling water water inlet temperature
Degree and cooling water leaving water temperature, determine the reason of the high voltage protective of compressor；The reason determining the high voltage protective of compressor is entered
Row prompting.
Further, monitor and know the high voltage protective condition meeting compressor, including: connect in default very first time threshold value
Continue and compressor high-pressure value detected more than presetting the first pressure threshold, it is determined that meet the high voltage protective condition of compressor.
Further, according to current cold in-water temperature and cooling water leaving water temperature, the high voltage protective of compressor is determined
Reason, including: compare judgement by currently cooling down water leaving water temperature and preset first temperature threshold value；Judging current cooling
When water leaving water temperature is more than or equal to the first temperature threshold, determine that the reason of the high voltage protective of compressor is system cooling water temperature
Too high.
Further, when judging current cooling water leaving water temperature less than preset first temperature threshold value: calculate current cooling
Water leaving water temperature and cooling water enter the difference of coolant-temperature gage；The difference of calculating and preset second temperature threshold value are compared judgement；
When judging difference more than or equal to the second temperature threshold, determine that the reason of the high voltage protective of compressor is that flow system flow is low.
Further, when judging difference less than the second temperature threshold, determine that the reason of high voltage protective of compressor is for being
System condenser heat exchange is abnormal.
Further, the reason determining the high voltage protective of compressor is pointed out, including: the high pressure of compressor will be determined
The reason of protection is pointed out with display lamp and/or display mode word；And/or, the former of the high voltage protective of compressor will be determined
Point out in display lamp mode because of corresponding default solution and/or show text prompt.
Further, know the high voltage protective condition meeting compressor in monitoring before, also include: obtain at predetermined time intervals
Take cold in-water temperature and cooling water leaving water temperature；According to cold in-water temperature and cooling water leaving water temperature to compressor it is
No high voltage protective will be occurred to carry out pre-judgement, and determine the reason that high voltage protective will occur；Adjust according to the reason determined
The operation of system.
Further, high pressure whether will be occurred to protect compressor according to cold in-water temperature and cooling water leaving water temperature
Protect and carry out pre-judgement, and determine the reason that high voltage protective will occur, including: will cooling water leaving water temperature and default 3rd temperature
Threshold value compares judgement；When judging current cooling water leaving water temperature more than or equal to three temperature thresholds, it is judged that Jiang Huifa
Raw high voltage protective, determines that the reason that high voltage protective will occur is blower fan of cooling tower running status.
Further, after determining that the reason that high voltage protective will occur is blower fan of cooling tower running status, according to determining
Reason adjust system operation, including: detection blower fan of cooling tower running status, determining the running status of blower fan of cooling tower
During for closing, blower fan of cooling tower is opened.
Further, when judging cooling water leaving water temperature less than default three temperature threshold: calculate current cooling water and go out
Coolant-temperature gage and cooling water enter the difference of coolant-temperature gage；The difference of calculating is compared judgement with presetting the 4th temperature threshold；Sentencing
When offset value is more than or equal to four temperature thresholds, determine that the reason that high voltage protective will occur is water pump operation state.
Further, after determining that the reason that high voltage protective will occur is water pump operation state, according to the reason determined
The operation of adjustment system, including: the running status of detection water pump, when the running status determining water pump is to close, water pump is left
Open.
Further, when judging difference less than four temperature thresholds, determine that the reason that high voltage protective will occur is cold
Condenser heat exchange is abnormal.
Further, after determining that the reason that high voltage protective will occur is condenser fault, adjust according to the reason determined
The operation of whole system, including: send the information that prompting condenser heat exchange is abnormal.
Another aspect according to disclosure embodiment, it is provided that the high voltage protective of a kind of central air-conditioning compressor controls dress
Putting, this device includes: monitor acquiring unit, knows, for monitoring, the high voltage protective condition meeting compressor, controls to stop compression
The operation of machine, and obtain current cold in-water temperature and cooling water leaving water temperature；Determine unit, for according to currently cooling down water
Inflow temperature and cooling water leaving water temperature, determine the reason of the high voltage protective of compressor；Tip element, for determining compressor
The reason of high voltage protective point out.
Further, this device also includes: judging unit, for being consecutively detected compression in default very first time threshold value
Machine high-pressure value is more than presetting the first pressure threshold, it is determined that meet the high voltage protective condition of compressor.
Further, it is determined that unit includes: the first comparison module, for currently cooling down water leaving water temperature and presetting first
Temperature threshold compares judgement；First determines module, for judging that current cooling water leaving water temperature is more than or equal to first
During temperature threshold, determine that the reason of the high voltage protective of compressor is that system cooling water temperature is too high；First computing module, is used for
When judging current cooling water leaving water temperature less than preset first temperature threshold value, calculate current cooling water leaving water temperature and cooling water enters
The difference of coolant-temperature gage；Second comparison module, for comparing judgement by the difference of calculating and preset second temperature threshold value；Second
Determine module, for when judging difference more than or equal to the second temperature threshold, determining that the reason of the high voltage protective of compressor is
Flow system flow is low；3rd determines module, for when judging difference less than the second temperature threshold, determining the high voltage protective of compressor
Reason be that system condenser heat exchange is abnormal.
Further, the reason determining the high voltage protective of compressor is pointed out by Tip element, including: compression will be determined
The reason of the high voltage protective of machine is pointed out with display lamp and/or display mode word；And/or, the high pressure of compressor will be determined
The default solution that the reason of protection is corresponding is pointed out in display lamp mode and/or shows text prompt.
Further, this device also includes: acquiring unit, for knowing the high voltage protective condition meeting compressor in monitoring
Before, cold in-water temperature and cooling water leaving water temperature are obtained at predetermined time intervals；Pre-judging unit, for according to cooling water
Whether compressor will be occurred high voltage protective to carry out pre-judgement by inflow temperature and cooling water leaving water temperature, and determines and will occur
The reason of high voltage protective；Adjustment unit, for adjusting the operation of system according to the reason determined.
Further, pre-judging unit includes: the 3rd comparison module, for cooling down water leaving water temperature and preset the 3rd temperature
Degree threshold value compares judgement；4th determines module, for judging that current cooling water leaving water temperature is more than or equal to the 3rd temperature
During degree threshold value, it is judged that high voltage protective will occur, determine that the reason that high voltage protective will occur is blower fan of cooling tower running status；
The running status of adjustment unit detection blower fan of cooling tower, when the running status determining blower fan of cooling tower is to close, by cooling tower
Blower fan is opened；Second computing module, when judging cooling water leaving water temperature less than default three temperature threshold, calculates current cooling
Water leaving water temperature and cooling water enter the difference of coolant-temperature gage；4th comparison module, for difference and default 4th temperature that will calculate
Threshold value compares judgement；5th determines module, and for when judging difference more than or equal to four temperature thresholds, determining will
The reason that high voltage protective occurs is water pump operation state；The running status of adjustment unit detection water pump, is determining the operation of water pump
When state is for closing, water pump is opened；6th determines module, for judge difference be less than four temperature thresholds time, determine by
The reason that high voltage protective can occur is that condenser heat exchange is abnormal；Adjustment unit sends the prompting letter that prompting condenser heat exchange is abnormal
Breath.
In the present invention, after central air-conditioning water chiller compressor generation high voltage protective, except controlling compressor shutdown and reporting
Beyond announcement, also obtain and cold in-water temperature and cooling water leaving water temperature after high voltage protective occurs, according to cooling water turnover water temperature
Degree information, determines the possible reason that this high voltage protective occurs, and after reason is prompted to user, user can be at its ability model
Investigate in enclosing and solve, it is not necessary to being intended to specific people after every time there is high voltage protective and come overhauling, efficiently solve
In prior art after water chiller generation high voltage protective, user cannot determine failure cause, the problem being unfavorable for work efficiency,
Improve air conditioning unit work efficiency.
Accompanying drawing explanation
Fig. 1 is a kind of optional flow process of the high voltage protective control method of the central air-conditioning compressor of the embodiment of the present invention
Figure；
Fig. 2 is the another kind of optional flow process of the high voltage protective control method of the central air-conditioning compressor of the embodiment of the present invention
Figure；
Fig. 3 is a kind of optional structural frames of the high voltage protective control device of the central air-conditioning compressor of the embodiment of the present invention
Figure；
Fig. 4 is the another kind of optional structure of the high voltage protective control device of the central air-conditioning compressor of the embodiment of the present invention
Block diagram；And
Fig. 5 is another optional structure of the high voltage protective control device of the central air-conditioning compressor of the embodiment of the present invention
Block diagram.
Detailed description of the invention
Here will illustrate exemplary embodiment in detail, its example represents in the accompanying drawings.Explained below relates to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represents same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the present invention.On the contrary, they are only with the most appended
The example of the apparatus and method that some aspects that described in detail in claims, the present invention are consistent.
Embodiment 1
Below in conjunction with the accompanying drawings the high voltage protective control method of the central air-conditioning compressor that the present invention provides is illustrated.
The high voltage protective control method of the central air-conditioning compressor that the present invention provides can be applied at house with air conditioning unit
On equipment, it is also possible to be applied to the control of Central air-conditioning unit under other environment, Fig. 1 illustrates the high pressure of this central air-conditioning compressor
A kind of optional flow chart of protection control method, as it is shown in figure 1, the method may comprise steps of S102-S106:
S102, monitors and knows the high voltage protective condition meeting compressor, controls to stop the operation of compressor, and obtains current
Cold in-water temperature and cooling water leaving water temperature；
When determining whether the high voltage protective condition meeting compressor, it is preferable that in default very first time threshold value continuously
Compressor high-pressure value detected more than presetting the first pressure threshold, it is determined that meet the high voltage protective condition of compressor.Above-mentioned
In preferred embodiment, the condition met continuously in arranging this very first time threshold value, is to get rid of due to pressure oscillation by mistake
Report fault, improves system stability.
S104, according to current cold in-water temperature and cooling water leaving water temperature, determines high voltage protective former of compressor
Cause；
During implementing, compare judgement by currently cooling down water leaving water temperature with preset first temperature threshold value；?
When judging current cooling water leaving water temperature more than or equal to the first temperature threshold, determine that the reason of high voltage protective of compressor is for being
System cooling water temperature is too high.
Wherein, system cooling water temperature too high protection reflection be cooling tower heat radiation bad, and cooling tower heat radiation bad can
Can be that blower fan of cooling tower is not opened, if so always reporting this fault in the unit section period, may remind the user that and can check
Lower cooling tower.
When judging current cooling water leaving water temperature less than preset first temperature threshold value: calculate current cooling water leaving water temperature
With the difference that cooling water enters coolant-temperature gage；The difference of calculating and preset second temperature threshold value are compared judgement；Judging difference
During more than or equal to the second temperature threshold, determine that the reason of the high voltage protective of compressor is that flow system flow is low.
Wherein, the low reflection of flow system flow is that discharge is low, and the low ability (flow is low) being probably water pump of discharge
Or water valve valve open big not, if so this fault of unit report, user can be pointed out just can to check lower water pump and water
Valve valve.
When judging difference less than the second temperature threshold, determine that the reason of the high voltage protective of compressor is that system condenser changes
Heat anomaly.Wherein, system condenser heat exchange anomalous reflection is that package heat exchange is abnormal, if so this fault of unit report, could
Can check that lower package is the dirtiest stifled with prompting user.
S106, points out the reason determining the high voltage protective of compressor.
When pointing out, it is preferable that will determine that the reason of the high voltage protective of compressor is with display lamp and/or display word
Mode is pointed out；And/or, by default solution corresponding for the reason that determines the high voltage protective of compressor in display lamp mode
Prompting and/or display text prompt.By determining that the reason of high voltage protective is pointed out to analyzing, and prompting user solves to do
Method, makes user can get information about reason that may be present and solution, convenient use after unit generation high voltage protective
Family.
Above-mentioned preferred embodiment in, after central air-conditioning water chiller compressor generation high voltage protective, except control pressure
Beyond contracting machine is shut down and reported, also obtain and cold in-water temperature and cooling water leaving water temperature after high voltage protective occurs, according to cold
But water Inlet and outlet water temperature information, determines the possible reason that this high voltage protective occurs, after reason is prompted to user, Yong Huke
To investigate in its limit of power and to solve, it is not necessary to be intended to specific people's detection of coming after every time there is high voltage protective and repair
Reason, efficiently solves in prior art after water chiller generation high voltage protective, and user cannot determine failure cause, is unfavorable for work
The problem making efficiency, improves air conditioning unit work efficiency.
Further, in another optional embodiment of the present invention, also said method is optimized, increases and send out
The pre-judgement scheme of raw high voltage protective, the data variation trend before being occurred by fault, analyze it may happen that the reason of fault, and
Carry out prompting and automatically take appropriate measures, reducing the possibility that error protection occurs, promoting serviceability.
When implementing, before monitoring and knowing the high voltage protective condition meeting compressor, this method also includes: in real time or
Obtain cold in-water temperature and cooling water leaving water temperature at predetermined time intervals；According to cold in-water temperature and cooling water water outlet
Whether compressor will be occurred high voltage protective to carry out pre-judgement by temperature, and determines the reason that high voltage protective will occur；According to
The reason determined adjusts the operation of system.
Specifically, high pressure whether will be occurred to protect compressor according to cold in-water temperature and cooling water leaving water temperature
Protect and carry out pre-judgement, and determine the reason that high voltage protective will occur, comprise the following steps: water leaving water temperature will be cooled down and preset
3rd temperature threshold compares judgement；When judging current cooling water leaving water temperature more than or equal to three temperature thresholds, sentence
Break and high voltage protective will occur, determine that the reason that high voltage protective will occur is blower fan of cooling tower running status.
After determining that the reason that high voltage protective will occur is blower fan of cooling tower running status, the fortune of detection blower fan of cooling tower
Row state, when the running status determining blower fan of cooling tower is to close, opens blower fan of cooling tower.
Further, when judging cooling water leaving water temperature less than default three temperature threshold: calculate current cooling water and go out
Coolant-temperature gage and cooling water enter the difference of coolant-temperature gage；The difference of calculating is compared judgement with presetting the 4th temperature threshold；Sentencing
When offset value is more than or equal to four temperature thresholds, determine that the reason that high voltage protective will occur is water pump operation state.
After determining that the reason that high voltage protective will occur is water pump operation state, the running status of institute's detection water pump,
When determining the running status of water pump for closing, water pump is opened.
When judging difference less than four temperature thresholds, determine that the reason that high voltage protective will occur is that condenser heat exchange is different
Often.After determining that the reason that high voltage protective will occur is condenser fault, send the prompting letter that prompting condenser heat exchange is abnormal
Breath, directly reminds user's condenser heat exchange abnormal.
2 pairs of said methods are further elaborated to be best understood from the present invention below in conjunction with the accompanying drawings:
Fig. 2 illustrates the another kind of optional flow chart of this method, as in figure 2 it is shown, comprise the steps:
S201, on the premise of not met high voltage protective condition, reads the temperature of cooling water water-in and water-out；According to read
The temperature of cooling water water-in and water-out judges the relation between cooling water leaving water temperature and empirical value A.
S202, it is judged that whether cool down water leaving water temperature >=A in T time；If so, perform step S203, otherwise, perform step
Rapid S204.Preferably, A can determine based on experience value.
S203, if cooling water leaving water temperature is more than or equal to empirical value A, reminds cooling tower heat radiation abnormal；Afterwards, unit
Go voluntarily to check whether blower fan of cooling tower is opened, if if not opening, being switched on blower fan of cooling tower；
S204, if cooling water leaving water temperature is less than empirical value A, (cooling water goes out to continue to determine whether to cool down the water end (W.E.) temperature difference
Coolant-temperature gage-cold in-water temperature) >=B；If so, perform step S205, otherwise, perform step S206.
S205, if the cooling water end (W.E.) temperature difference (cooling water leaving water temperature-cold in-water temperature) >=B, system for prompting current
Measure low；Afterwards, unit goes to check the state of water pump voluntarily, if water pump is not opened, opens water pump；Preferably, in T time, on
When condition of stating also meets, after illustrating that unit oneself cannot regulate, user is just reminded to go to process.
S206, if the cooling water end (W.E.) temperature difference (cooling water leaving water temperature-cold in-water temperature) < during B, directly reminds user
Condenser heat exchange is abnormal.
If the user while do not solve problem before report high voltage protective, unit (in certain time is within the regular hour
In order to get rid of owing to fault is reported in pressure oscillation by mistake) the high-pressure respective value that all detects more than group setup value, i.e. meet height
During the condition that pressure is protected, it is required for shutting down report protection (protection unit).But, if simply merely reporting high voltage protective, user
Unit hypertonia can only be known from this, but and unclear why report or how can reduce unnecessary disorderly closedown,
Improve the utilization rate of unit.
In consideration of it, on the basis of above-mentioned steps S201-S206, further comprising the steps of:
S207, it may be judged whether meet high voltage protective condition；That is, the high-pressure that unit all detected within the regular hour
Respective value is more than group setup value, meets the condition of high voltage protective.If so, perform step S208, otherwise, return step S201.
S208, reads cold in-water temperature when reporting high voltage protective, cooling water leaving water temperature；
S209, it may be judged whether cooling water leaving water temperature >=C；If so, perform step S210, otherwise, perform step S211；
S210, determines the too high protection of system cooling water temperature；
S211, continues to determine whether to cool down the water end (W.E.) temperature difference (cooling water leaving water temperature-cold in-water temperature) >=D, if so,
Perform step S212, otherwise, perform step S213.
S212, determines that flow system flow is low；
S213, determines that system condenser heat exchange is abnormal.
Specifically, after reading cold in-water temperature when reporting high voltage protective, cooling water leaving water temperature, compare now
The relation of cooling water leaving water temperature value and numerical value C, and, now the difference of cooling water leaving water temperature-cold in-water temperature with
Relation between numerical value D, according to different comparative results, resolves into 3 different protections: the too high guarantor of system cooling water temperature
Protect, flow system flow is low, system condenser heat exchange is abnormal, and wherein, the numerical value that letter C in figure and D represent is according in unit
Variate-value gets.
In above-mentioned steps S210, the too high protection reflection of system cooling water temperature is that cooling tower heat radiation is bad, and cools down
The tower bad blower fan of cooling tower that is probably that dispels the heat is not opened, if so always reporting this fault in the unit section period, user is permissible
Check lower cooling tower；In above-mentioned steps S212, the low reflection of flow system flow is that discharge is low, and discharge is low is probably water pump
Ability (flow is low) or water valve valve open big not, if so this fault of unit report, user just can check down
Water pump and water valve valve；In above-mentioned steps S213, system condenser heat exchange anomalous reflection is that package heat exchange is abnormal, the most such as
Really this fault of unit report, user can check that lower package is the dirtiest stifled.
Afterwards, user just can be regulated by unit voluntarily, unit is reminded and the protection of report, probably knows problem fault
Point, processes well part of generating units problem, allows unit normally work as early as possible, and can reduce the number of times of unit frequent shutdown report protection, carry
Comfortableness when high unit durability and normal function rate and user use.
Embodiment 2
High voltage protective control method based on the central air-conditioning compressor provided in above-described embodiment 1, the present invention is optional
Embodiment 2 additionally provides the high voltage protective of a kind of central air-conditioning compressor and controls device, and specifically, Fig. 3 illustrates this device
A kind of optional structured flowchart, as it is shown on figure 3, this device includes:
Monitor acquiring unit 32, know, for monitoring, the high voltage protective condition meeting compressor, control to stop compressor
Run, and obtain current cold in-water temperature and cooling water leaving water temperature；Determine unit 34, for entering according to current cooling water
Coolant-temperature gage and cooling water leaving water temperature, determine the reason of the high voltage protective of compressor；Tip element 36, for determining compressor
The reason of high voltage protective point out.
Further, as shown in Figure 4, this device also includes: judging unit 42, for connecting in default very first time threshold value
Continue and compressor high-pressure value detected more than presetting the first pressure threshold, it is determined that meet the high voltage protective condition of compressor.
Further, it is determined that unit includes: the first comparison module, for currently cooling down water leaving water temperature and presetting first
Temperature threshold compares judgement；First determines module, for judging that current cooling water leaving water temperature is more than or equal to first
During temperature threshold, determine that the reason of the high voltage protective of compressor is that system cooling water temperature is too high；First computing module, is used for
When judging current cooling water leaving water temperature less than preset first temperature threshold value, calculate current cooling water leaving water temperature and cooling water enters
The difference of coolant-temperature gage；Second comparison module, for comparing judgement by the difference of calculating and preset second temperature threshold value；Second
Determine module, for when judging difference more than or equal to the second temperature threshold, determining that the reason of the high voltage protective of compressor is
Flow system flow is low；3rd determines module, for when judging difference less than the second temperature threshold, determining the high voltage protective of compressor
Reason be that system condenser heat exchange is abnormal.
Further, the reason determining the high voltage protective of compressor is pointed out by Tip element, including: compression will be determined
The reason of the high voltage protective of machine is pointed out with display lamp and/or display mode word；And/or, the high pressure of compressor will be determined
The default solution that the reason of protection is corresponding is pointed out in display lamp mode and/or shows text prompt.
Further, as it is shown in figure 5, this device also includes: acquiring unit 52, meet compressor for knowing in monitoring
Before high voltage protective condition, obtain cold in-water temperature and cooling water leaving water temperature at predetermined time intervals；Pre-judging unit 54,
For high voltage protective whether being occurred to carry out pre-judgement compressor according to cold in-water temperature and cooling water leaving water temperature,
And determine the reason that high voltage protective will occur；Adjustment unit 56, for adjusting the operation of system according to the reason determined.
Further, pre-judging unit includes: the 3rd comparison module, for cooling down water leaving water temperature and preset the 3rd temperature
Degree threshold value compares judgement；4th determines module, for judging that current cooling water leaving water temperature is more than or equal to the 3rd temperature
During degree threshold value, it is judged that high voltage protective will occur, determine that the reason that high voltage protective will occur is blower fan of cooling tower running status；
The running status of adjustment unit detection blower fan of cooling tower, when the running status determining blower fan of cooling tower is to close, by cooling tower
Blower fan is opened；Second computing module, when judging cooling water leaving water temperature less than default three temperature threshold, calculates current cooling
Water leaving water temperature and cooling water enter the difference of coolant-temperature gage；4th comparison module, for difference and default 4th temperature that will calculate
Threshold value compares judgement；5th determines module, and for when judging difference more than or equal to four temperature thresholds, determining will
The reason that high voltage protective occurs is water pump operation state；The running status of adjustment unit detection water pump, is determining the operation of water pump
When state is for closing, water pump is opened；6th determines module, for judge difference be less than four temperature thresholds time, determine by
The reason that high voltage protective can occur is that condenser heat exchange is abnormal；Adjustment unit sends the prompting letter that prompting condenser heat exchange is abnormal
Breath.
About the device in above-described embodiment, wherein unit, module perform the concrete mode of operation relevant
The embodiment of the method is described in detail, explanation will be not set forth in detail herein.
It can be seen from the foregoing description that in an embodiment of the present invention, there is height in central air-conditioning water chiller compressor
After pressure protection, in addition to controlling compressor shutdown and reporting, also obtain and cold in-water temperature and cooling after high voltage protective occurs
Water leaving water temperature, according to cooling water Inlet and outlet water temperature information, determines the possible reason that this high voltage protective occurs, reason is carried
After showing to user, user can investigate in its limit of power and solve, it is not necessary to be intended to spy after there is high voltage protective every time
Fix the number of workers comes overhauling, efficiently solves in prior art after water chiller generation high voltage protective, and user cannot determine
Failure cause, the problem being unfavorable for work efficiency, improves air conditioning unit work efficiency.
Further, judging reason that anticipation fault occurs and taking corresponding strategy by trend, reduces high voltage protective
Occurring, minimizing is shut down impact and is used, and completes fault location, reduces unit because of the number of times of disorderly closedown, raising unit durability and work
Make efficiency and the comfortableness of user's use.
Those skilled in the art, after considering description and putting into practice invention disclosed herein, will readily occur to its of the present invention
Its embodiment.The application is intended to any modification, purposes or the adaptations of the present invention, these modification, purposes or
Person's adaptations is followed the general principle of the present invention and includes the common knowledge in the art that the present invention does not invents
Or conventional techniques means.Description and embodiments is considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the invention is not limited in precision architecture described above and illustrated in the accompanying drawings, and
And various modifications and changes can carried out without departing from the scope.The scope of the present invention is only limited by appended claim.
Claims (18)
1. the high voltage protective control method of a central air-conditioning compressor, it is characterised in that including:
Monitor and know the high voltage protective condition meeting compressor, control to stop the operation of described compressor, and obtain current cooling
Water inflow temperature and cooling water leaving water temperature；
According to described current cold in-water temperature and cooling water leaving water temperature, determine the reason of the high voltage protective of compressor；
The reason determining the high voltage protective of described compressor is pointed out.
Method the most according to claim 1, it is characterised in that the high voltage protective bar meeting compressor is known in described monitoring
Part, including:
Compressor high-pressure value it is consecutively detected more than presetting the first pressure threshold, it is determined that full in default very first time threshold value
The high voltage protective condition of foot compressor.
Method the most according to claim 2, it is characterised in that described according to described current cold in-water temperature and cooling
Water leaving water temperature, determines the reason of the high voltage protective of compressor, including:
Described current cooling water leaving water temperature and preset first temperature threshold value are compared judgement；
When judging described current cooling water leaving water temperature more than or equal to described first temperature threshold, determine the high pressure of compressor
The reason of protection is that system cooling water temperature is too high.
Method the most according to claim 3, it is characterised in that judging that described current cooling water leaving water temperature is less than described
During preset first temperature threshold value:
Calculate presently described cooling water leaving water temperature and described cooling water enters the difference of coolant-temperature gage；
The described difference calculated and preset second temperature threshold value are compared judgement；
When judging described difference more than or equal to described second temperature threshold, determine that the reason of high voltage protective of compressor is for being
System flow is low.
Method the most according to claim 4, it is characterised in that judging that described difference is less than described second temperature threshold
Time, determine that the reason of the high voltage protective of compressor is that system condenser heat exchange is abnormal.
Method the most according to claim 1, it is characterised in that described will determine the reason of the high voltage protective of described compressor
Point out, including:
The reason determining the high voltage protective of described compressor is pointed out with display lamp and/or display mode word；And/or
Default solution corresponding for the reason determining the high voltage protective of described compressor is pointed out in display lamp mode and/or aobvious
Show text prompt.
Method the most according to claim 1, it is characterised in that know the high voltage protective bar meeting compressor in described monitoring
Before part, also include:
Obtain cold in-water temperature and cooling water leaving water temperature at predetermined time intervals；
Whether high voltage protective will be occurred to carry out compressor according to described cold in-water temperature and cooling water leaving water temperature pre-
Judge, and determine the reason that high voltage protective will occur；
The operation of system is adjusted according to the described reason determined.
Method the most according to claim 7, it is characterised in that described according to described cold in-water temperature and cooling water go out
Whether compressor will be occurred high voltage protective to carry out pre-judgement by coolant-temperature gage, and determines the reason that high voltage protective will occur, bag
Include:
Described cooling water leaving water temperature is compared judgement with presetting the 3rd temperature threshold；
When judging described current cooling water leaving water temperature more than or equal to described three temperature threshold, it is judged that high pressure will occur
Protection, determines that the reason that high voltage protective will occur is blower fan of cooling tower running status.
Method the most according to claim 8, it is characterised in that determining that the reason that high voltage protective will occur is cooling tower
After fan operation state, the described operation adjusting system according to the described reason determined, including:
Detect the running status of described blower fan of cooling tower, when the running status determining described blower fan of cooling tower is to close, by institute
State blower fan of cooling tower to open.
Method the most according to claim 8, it is characterised in that judging that described cooling water leaving water temperature is less than described pre-
If during three temperature thresholds:
Calculate presently described cooling water leaving water temperature and described cooling water enters the difference of coolant-temperature gage；
The described difference calculated is compared judgement with presetting the 4th temperature threshold；
When judging described difference more than or equal to described four temperature threshold, determine that the reason that high voltage protective will occur is water
Pump operation state.
11. methods according to claim 10, it is characterised in that determining that the reason that high voltage protective will occur is water pump
After running status, the described operation adjusting system according to the described reason determined, including:
Detect the running status of described water pump, when the running status determining described water pump is to close, described water pump is opened.
12. methods according to claim 10, it is characterised in that judging that described difference is less than described 4th temperature threshold
Time, determine that the reason that high voltage protective will occur is that condenser heat exchange is abnormal.
13. methods according to claim 12, it is characterised in that determining that the reason that high voltage protective will occur is condensation
After device fault, the described operation adjusting system according to the described reason determined, including:
Send the information that prompting condenser heat exchange is abnormal.
The high voltage protective of 14. 1 kinds of central air-conditioning compressors controls device, it is characterised in that including:
Monitor acquiring unit, know, for monitoring, the high voltage protective condition meeting compressor, control to stop the fortune of described compressor
OK, and obtain current cold in-water temperature and cooling water leaving water temperature；
Determine unit, for according to described current cold in-water temperature and cooling water leaving water temperature, determining the high pressure of compressor
The reason of protection；
Tip element, for pointing out the reason of the high voltage protective determining described compressor.
15. devices according to claim 14, it is characterised in that also include:
Judging unit, for being consecutively detected compressor high-pressure value more than presetting the first pressure in default very first time threshold value
Power threshold value, it is determined that meet the high voltage protective condition of compressor.
16. devices according to claim 14, it is characterised in that described determine that unit includes:
First comparison module, for comparing judgement by described current cooling water leaving water temperature and preset first temperature threshold value；
First determines module, for judging that described current cooling water leaving water temperature is more than or equal to described first temperature threshold
Time, determine that the reason of the high voltage protective of compressor is that system cooling water temperature is too high；
First computing module, is used for when judging described current cooling water leaving water temperature less than described preset first temperature threshold value,
Calculate presently described cooling water leaving water temperature and described cooling water enters the difference of coolant-temperature gage；
Second comparison module, for comparing judgement by the described difference calculated and preset second temperature threshold value；
Second determines module, for when judging described difference more than or equal to described second temperature threshold, determining compressor
The reason of high voltage protective is that flow system flow is low；
3rd determines module, for when judging described difference less than described second temperature threshold, determines that the high pressure of compressor is protected
The reason protected is that system condenser heat exchange is abnormal.
17. devices according to claim 14, it is characterised in that also include:
Acquiring unit, before know the high voltage protective condition meeting compressor in described monitoring, obtains at predetermined time intervals
Cold in-water temperature and cooling water leaving water temperature；
Whether pre-judging unit, for occurring compressor according to described cold in-water temperature and cooling water leaving water temperature
High voltage protective carries out pre-judgement, and determines the reason that high voltage protective will occur；
Adjustment unit, for adjusting the operation of system according to the described reason determined.
18. devices according to claim 17, it is characterised in that described pre-judging unit includes:
3rd comparison module, for comparing judgement by described cooling water leaving water temperature with presetting the 3rd temperature threshold；
4th determines module, for judging that described current cooling water leaving water temperature is more than or equal to described 3rd temperature threshold
Time, it is judged that high voltage protective will occur, determine that the reason that high voltage protective will occur is blower fan of cooling tower running status；
Described adjustment unit detects the running status of described blower fan of cooling tower, in the running status determining described blower fan of cooling tower is
During closedown, described blower fan of cooling tower is opened；
Second computing module, when judging described cooling water leaving water temperature less than described default three temperature threshold, calculates current
Described cooling water leaving water temperature and described cooling water enter the difference of coolant-temperature gage；
4th comparison module, for comparing judgement by the described difference calculated with presetting the 4th temperature threshold；
5th determines module, for when judging described difference more than or equal to described four temperature threshold, determining and will occur
The reason of high voltage protective is water pump operation state；
Described adjustment unit detects the running status of described water pump, when the running status determining described water pump is to close, by institute
State water pump to open；
6th determines module, for when judging described difference less than described four temperature threshold, determining and high pressure will be occurred to protect
The reason protected is that condenser heat exchange is abnormal；
Described adjustment unit sends the information that prompting condenser heat exchange is abnormal.
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| CN110486914A (en) * | 2019-08-21 | 2019-11-22 | 珠海格力电器股份有限公司 | A kind of control method of Hot water units, device and Hot water units |
| CN110925949A (en) * | 2019-11-12 | 2020-03-27 | 珠海格力电器股份有限公司 | Control method, device and equipment of water-cooling type air conditioning unit and storage medium |
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| CN111707031A (en) * | 2020-05-25 | 2020-09-25 | 广东纽恩泰新能源科技发展有限公司 | Heat pump unit starting control method and system |
| CN111707031B (en) * | 2020-05-25 | 2021-06-11 | 广东纽恩泰新能源科技发展有限公司 | Heat pump unit starting control method and system |
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