CN105157087A - Control method and device of heat pump unit - Google Patents
Control method and device of heat pump unit Download PDFInfo
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- CN105157087A CN105157087A CN201510666365.2A CN201510666365A CN105157087A CN 105157087 A CN105157087 A CN 105157087A CN 201510666365 A CN201510666365 A CN 201510666365A CN 105157087 A CN105157087 A CN 105157087A
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Abstract
The invention discloses a control method and device of a heat pump unit. The control method includes the steps that the water-supplying temperature of current operation units in a heat pump system is detected; based on the water-supplying temperature and the number of the current operation units, shutdown units in the heat pump system are determined; after the shutdown units perform shutdown for a first preset time section, the average water-supplying temperature and average water-returning temperature of remaining units in the heat pump system are detected; based on the average water-supplying temperature and average water-returning temperature of the remaining units, whether standby units are started is determined. The technical problem that the capacity of adjusting load changes at the tail ends of the units is poor is solved, and the effects of improving heating stability and reliability at the tail ends of the units and increasing the comfort degree of users are achieved.
Description
Technical field
The present invention relates to Mechanical course field, in particular to a kind of control method and device of source pump.
Background technology
Along with the northern heating market demand increases day by day, the importance of environmental protection and energy saving by people cognition, and government department is for the resolution of environmental improvement, and the heat pump product technology for heating application is also increasing and ripe.
At present, the heat pump heating product on market is mainly to determine frequency product, and the susceptibility for end load is very low.Particularly; for multiple stage frequency heat pump unit surely; what apply due to this unit is the on off control mode of end heating; it is much the start stop mode directly continuing to use single unit employing; namely once detect into water or leaving water temperature and meet shutdown/compressor start up condition; the then unified shutdown of multiple stage heat pump or start, and in the start of multiple stage unit with when shutting down, every platform unit is opened or the time interval of stopping is a steady state value.
By above-mentioned on off control mode, because unit unifies on off control, do not regulate surplus, its end heating effect, cold and hot difference variation are larger; Adopt unified on off control, when end load is little, after multiple stage unit is opened, end reaches halt condition very soon, there will be frequent start-stop.In general, the multiple stage start and stop comfortableness that frequently heat pump is used for heating is surely a great problem.
Wherein, the end load of heat pump refers to and the air parameter of indoor is maintained design parameter state, the heat that unit interval domestic demand provides to building.
For the problem of the regulating power difference that the above-mentioned end load to unit changes, at present effective solution is not yet proposed.
Summary of the invention
Embodiments provide a kind of control method and device of source pump, at least to solve the technical problem to the regulating power difference that the end load of unit changes.
According to an aspect of the embodiment of the present invention, provide a kind of control method of source pump, this control method comprises: the supply water temperature detecting current operating unit in heat pump; Based on the shutdown unit in the supply water temperature of current operating unit and the unit quantity determination heat pump of current operating unit; After shutdown compressor emergency shutdown first preset time period, detect in heat pump and remain the average supply water temperature of unit and average return water temperature; Determine whether to open standby unit based on the average supply water temperature and average return water temperature that remain unit.
Further, comprise based on the shutdown unit in the supply water temperature of current operating unit and the unit quantity determination heat pump of current operating unit: judge in heat pump, whether the average supply water temperature of current operating unit is more than or equal to the first temperature threshold; If the average supply water temperature of current operating unit is more than or equal to the first temperature threshold, then the unit supply water temperature based on unit quantity and each current operating unit is determined to shut down unit; If the average supply water temperature of current operating unit is less than the first temperature threshold, then controls current operating unit and continue to run.
Further, the unit supply water temperature based on unit quantity and each current operating unit determines that shutting down unit comprises: judge whether unit quantity is more than or equal to predetermined number; If unit quantity is more than or equal to predetermined number, then obtain the unit supply water temperature of each current operating unit, contrast each unit supply water temperature, in the unit set with maximum unit supply water temperature, determine that a current operating unit is for shutting down unit; If unit quantity is less than predetermined number, then controls all current operating units and shut down.
Further, after determining the shutdown unit in heat pump, method also comprises: when shutting down compressor emergency shutdown, obtain the average return water temperature of current operating unit; Determine whether that opening standby unit comprises based on the residue average supply water temperature of unit and average return water temperature: determine whether to open standby unit based on the average supply water temperature of residue unit, the residue average return water temperature of unit and the average return water temperature of current operating unit.
Further, based on residue unit average supply water temperature, residue the average return water temperature of unit and the average return water temperature of current operating unit determine whether that opening standby unit comprises: judge in heat pump, whether the average supply water temperature of current operating unit is less than the first temperature threshold; If the average supply water temperature of current operating unit is less than the first temperature threshold in heat pump, then obtain the temperature variation of average return water temperature in the second preset time period of residue unit, determine whether to open standby unit based on the average return water temperature of current operating unit and temperature variation; If the average supply water temperature of current operating unit is not less than the first temperature threshold in heat pump, then determine not open standby unit.
Further, determine whether that opening standby unit comprises based on the average return water temperature of current operating unit and temperature variation: if the average return water temperature of residue unit is less than or equal to the second temperature threshold, then judge whether temperature variation is less than change threshold, wherein, the second temperature threshold is less than or equal to the average return water temperature of current operating unit; If temperature variation is less than change threshold, then controls a random unlatching unit in standby unit, if temperature variation is not less than change threshold, then determine not open standby unit.
According to the another aspect of the embodiment of the present invention, additionally provide a kind of control device of source pump, this control device comprises: first detection module, for detecting the supply water temperature of current operating unit in heat pump; First determination module, for based on the shutdown unit in the supply water temperature of current operating unit and the unit quantity determination heat pump of current operating unit; Second detection module, for after shutdown compressor emergency shutdown first preset time period, detects in heat pump and remains the average supply water temperature of unit and average return water temperature; Second determination module, for determining whether to open standby unit based on the average supply water temperature and average return water temperature that remain unit.
Further, the first determination module comprises: the first judge module, for judging in heat pump, whether the average supply water temperature of current operating unit is more than or equal to the first temperature threshold; First determines submodule, if be more than or equal to the first temperature threshold for the average supply water temperature of current operating unit, then the unit supply water temperature based on unit quantity and each current operating unit is determined to shut down unit; First control module, if be less than the first temperature threshold for the average supply water temperature of current operating unit, then control current operating unit and continues to run.
Further, first determines that submodule comprises: the second judge module, for judging whether unit quantity is more than or equal to predetermined number; First processing module, if be more than or equal to predetermined number for unit quantity, then obtain the unit supply water temperature of each current operating unit, contrast each unit supply water temperature, in the unit set with maximum unit supply water temperature, determine that a current operating unit is for shutting down unit; Second control module, if be less than predetermined number for unit quantity, then control all current operating units and shuts down.
Further, this device also comprises: acquisition module, for after determining the shutdown unit in heat pump, when shutting down compressor emergency shutdown, obtains the average return water temperature of current operating unit; Second determination module also comprises second and determines submodule, for based on residue unit average supply water temperature, residue the average return water temperature of unit and the average return water temperature of current operating unit determine whether to open standby unit.
Further, second determines that submodule comprises: the 3rd judge module, for judging in heat pump, whether the average supply water temperature of current operating unit is less than the first temperature threshold; Second processing module, if be less than the first temperature threshold for the average supply water temperature of operating unit current in heat pump, then obtain the temperature variation of average return water temperature in the second preset time period of residue unit, determine whether to open standby unit based on the average return water temperature of current operating unit and temperature variation; 3rd determination module, if be not less than the first temperature threshold for the average supply water temperature of operating unit current in heat pump, then determines not open standby unit.
Further, second processing module comprises: the 4th judge module module, if be less than or equal to the second temperature threshold for the average return water temperature remaining unit, then judges whether temperature variation is less than change threshold, wherein, the second temperature threshold is less than or equal to the average return water temperature of current operating unit; 3rd control module, if be less than change threshold for temperature variation, then control a random unlatching unit in standby unit, the 4th determination module, if be not less than change threshold for temperature variation, then determines not open standby unit.
In embodiments of the present invention, the shutdown unit of heat pump is determined by the supply water temperature of operating unit current in heat pump and the unit quantity of current operating unit, after shutdown first preset time period, determine whether to open standby unit by the average supply water temperature and average return water temperature that detect the residue unit in heat pump, thus can according to the end load situation of change of the unit of the operation in heat pump, control the start and stop situation of determining frequency unit, avoid all units and unify start and stop and the start and stop phenomenon too frequently caused, solve the problem to the regulating power difference that the end load of unit changes, achieve the regulating power improving and the end load of unit is changed, improve stability and the reliability of the heating of machine group end, add the level of comfort of user.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the control method of a kind of source pump according to the embodiment of the present invention;
Fig. 2 is the flow chart of the control method of a kind of optional source pump according to the embodiment of the present invention;
Fig. 3 is the schematic diagram of the control device of a kind of source pump according to the embodiment of the present invention.
Detailed description of the invention
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in description of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
According to the embodiment of the present invention, provide a kind of embodiment of control method of source pump, it should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although show logical order in flow charts, in some cases, can be different from the step shown or described by order execution herein.
Fig. 1 is the flow chart of the control method of a kind of source pump according to the embodiment of the present invention, and as shown in Figure 1, this control method comprises the steps:
Step S102, detects the supply water temperature of current operating unit in heat pump.
Step S104, based on the shutdown unit in the supply water temperature of current operating unit and the unit quantity determination heat pump of current operating unit.
Step S106, after shutdown compressor emergency shutdown first preset time period, detects in heat pump and remains the average supply water temperature of unit and average return water temperature.
Step S108, determines whether to open standby unit based on the average supply water temperature and average return water temperature remaining unit.
Adopt the above embodiment of the present invention, the shutdown unit of heat pump is determined by the supply water temperature of operating unit current in heat pump and the unit quantity of current operating unit, after shutdown first preset time period, determine whether to open standby unit by the average supply water temperature and average return water temperature that detect the residue unit in heat pump, thus can according to the water supply of the current operating unit in heat pump and return water temperature situation of change, also namely according to unit end load situation of change, control the start and stop situation of determining frequency unit, avoid all units and unify start and stop and the start and stop phenomenon too frequently caused, solve the problem to the regulating power difference that the end load of unit changes, achieve the regulating power improving and the end load of unit is changed, make to determine frequency heat pump can carry out start and stop allowance adjustment according to load variations, thus improve stability and the reliability of the heating of machine group end, add the level of comfort of user.
Particularly, the residue unit in above-described embodiment is do not comprise the current operating unit of shutting down unit in heat pump.
Alternatively, comprise based on the shutdown unit in the supply water temperature of current operating unit and the unit quantity determination heat pump of current operating unit: judge in heat pump, whether the average supply water temperature of current operating unit is more than or equal to the first temperature threshold; If the average supply water temperature of current operating unit is more than or equal to the first temperature threshold, then the unit supply water temperature based on unit quantity and each current operating unit is determined to shut down unit; If the average supply water temperature of current operating unit is less than the first temperature threshold, then controls current operating unit and continue to run.
In the above-described embodiments, determine to shut down unit by the relation of the average supply water temperature and the first temperature threshold that judge the current operating unit in heat pump, particularly, if average supply water temperature is more than or equal to the first temperature threshold, the shutdown situation of unit is determined again further by unit quantity and the unit supply water temperature of each current operating unit, if average supply water temperature is less than the first temperature threshold, then control current operating unit to continue to run, do not carry out the shutdown operation of unit, and return the average supply water temperature of the current operating unit judged in heat pump and the relation of the first temperature threshold, again determine whether unit shuts down by the temperature of unit and the concrete condition of quantity.Adopt above-described embodiment; can when controlling compressor emergency shutdown; first judge that the unit first reaching average supply water temperature and unit quantity term is first shut down, then carry out judging whether also to need to continue to stop other units, thus the effect that before realizing compressor emergency shutdown, heating allowance is adjustable.
Alternatively, the unit supply water temperature based on unit quantity and each current operating unit determines that shutting down unit comprises: judge whether unit quantity is more than or equal to predetermined number; If unit quantity is more than or equal to predetermined number, then obtain the unit supply water temperature of each current operating unit, contrast each unit supply water temperature, in the unit set with maximum unit supply water temperature, determine that a current operating unit is for shutting down unit; If unit quantity is less than predetermined number, then controls all current operating units and shut down.
In the above-described embodiments, after the supply water temperature detecting current operating unit in heat pump, first judge whether the average supply water temperature of current operating unit meets and be more than or equal to this condition of the first temperature threshold; If meet this condition, then judge whether unit quantity meets again and be more than or equal to predetermined number; If unit quantity is more than or equal to predetermined number, then in the unit set with maximum unit supply water temperature, determine that a current operating unit is for shutting down unit; If unit quantity is less than predetermined number, then heat pump controls all current operating unit shutdown.If average supply water temperature is less than the first temperature threshold, then controls current operating unit and continue to run.After shutdown compressor emergency shutdown first preset time period, determine whether to open standby unit based on the average supply water temperature of the residue unit detected and average return water temperature.By above-described embodiment, the operational factor that can realize according to current operating unit judges (comprising: unit quantity, average supply water temperature and average return water temperature) start and stop of unit more flexibly.
Alternatively, after determining the shutdown unit in heat pump, the method also comprises: when shutting down compressor emergency shutdown, obtain the average return water temperature of current operating unit; Determine whether that opening standby unit comprises based on the residue average supply water temperature of unit and average return water temperature: determine whether to open standby unit based on the average supply water temperature of residue unit, the residue average return water temperature of unit and the average return water temperature of current operating unit.
In the above-described embodiments; after determining the shutdown unit in heat pump; heat pump is while compressor emergency shutdown is shut down in control; obtain the average return water temperature of current operating unit, and determine the situation of opening standby unit based on the average supply water temperature of the residue unit after the shutdown of heat pump and average return water temperature.Pass through above-described embodiment, can reach and determine whether to need to open standby unit according to the temperature parameter of the unit in heat pump, also namely heat pump can control the opening of unit according to the situation of its end load (i.e. load), thus avoid all units of unified unlatching when end load (load) step-down, and the problem that the cold and hot difference variation brought is excessive, the varying duty realized determining frequency unit controls, make end heating more stable, heating user feels more comfortable.
Particularly, the unit quantity of the residue unit in above-described embodiment is that the unit quantity of the current operating unit in heat pump deducts the unit quantity of shutting down unit.The unit quantity of standby unit is the unit quantity that total unit quantity of all units in heat pump deducts current operating unit, and standby unit can comprise shutdown unit.
Alternatively, based on residue unit average supply water temperature, residue the average return water temperature of unit and the average return water temperature of current operating unit determine whether that opening standby unit comprises: judge in heat pump, whether the average supply water temperature of current operating unit is less than the first temperature threshold; If the average supply water temperature of current operating unit is less than the first temperature threshold in heat pump, then obtain the temperature variation of average return water temperature in the second preset time period of residue unit, determine whether to open standby unit based on the average return water temperature of current operating unit and temperature variation; If the average supply water temperature of current operating unit is not less than the first temperature threshold in heat pump, then determine not open standby unit.
In the above-described embodiments, after based on the shutdown unit in the supply water temperature of the current operating unit detected and the unit quantity determination heat pump of current operating unit, shut down compressor emergency shutdown first preset time period, then detect the average supply water temperature of residue unit and average return water temperature, then judge whether the average supply water temperature of current operating unit in heat pump meets the condition being less than the first temperature threshold; If meet this conditional average supply water temperature, then determine whether to open standby unit based on the average return water temperature of the current operating unit got and temperature variation; If average supply water temperature does not meet this condition, then determine not open standby unit.Adopt above-described embodiment, when heat pump controls to open standby unit, by after often opening a standby unit, judge the temperature rise (i.e. temperature variation) of the return water temperature of current operating unit, the speed of the speed increased according to temperature rise (i.e. temperature variation) judges whether to continue to open other unit in standby unit, thus realize flexibly according to the unlatching situation of the temperature variations determination unit of current operating unit, enable to determine frequency heat pump and reach the object of carrying out the allowance adjustment of starting shooting according to load.
Alternatively, determine whether that opening standby unit comprises based on the average return water temperature of current operating unit and temperature variation: if the average return water temperature of residue unit is less than or equal to the second temperature threshold, then judge whether temperature variation is less than change threshold, wherein, the second temperature threshold is less than or equal to the average return water temperature of current operating unit; If temperature variation is less than change threshold, then controls a random unlatching unit in standby unit, if temperature variation is not less than change threshold, then determine not open standby unit.
In the above-described embodiments, detecting the supply water temperature of current operating unit in heat pump, and determining to shut down unit based on the unit quantity of this supply water temperature and current operating unit; After shutdown compressor emergency shutdown first preset time period, detect in heat pump and remain the average supply water temperature of unit and average return water temperature; Judge whether the average supply water temperature that this detects is less than the first temperature threshold; If this average supply water temperature is less than the first temperature threshold, then obtain the temperature variation of average return water temperature in the second preset time period of residue unit, if the average return water temperature of residue unit is less than or equal to the second temperature threshold, then judge whether temperature variation is less than change threshold; If temperature variation is less than change threshold, then controls a random unlatching unit in standby unit, if temperature variation is not less than change threshold, then determine not open standby unit.If the average supply water temperature of current operating unit is not less than the first temperature threshold in heat pump, then also determine not open standby unit.By above-described embodiment, can come effectively to the adjustment of unit start according to the height of the return water temperature of current operating unit.Avoid the unified unit that controls when unit end load is less to open, and machine group end load increase fast and arrives halt condition very soon, the problem of the unit frequent start-stop brought, and then improving reliability of operation.
In an optional embodiment, as shown in Figure 2, the control of start to source pump and shutdown can be realized as follows.
Step S201: the supply water temperature detecting current operating unit in heat pump.
Concrete, in heat pump, multiple stage stable operation of unit, can carry out acquisition testing supply water temperature by the temperature sensor on every platform unit, can carry out Real-time Collection, and the time interval of collection can be 3 seconds to 5 seconds.
Step S202: judge whether the supply water temperature of current operating unit is greater than the first temperature threshold.If so, then perform step S203, if not, then control current operating unit and continue to run, and return execution step S201.
Concrete, when the average supply water temperature T of the current operating unit in heat pump being detected in real time
average water supplybe more than or equal to the first temperature threshold T
if(i.e. T
average water supply>=T
if), then judge the unit quantity n of current operating unit.If this unit quantity n is less than predetermined number N (i.e. n<N), then control whole current operating unit out of service; If this unit quantity n is not less than predetermined number N (i.e. n >=N), then enters next step (i.e. step S203) and judge.
Step S203: judge whether the unit quantity of current operating unit is more than or equal to predetermined number.If so, then step S204 is performed, if not, then perform step S205.
Step S204: after shutdown compressor emergency shutdown first preset time period; obtain the unit supply water temperature of each current operating unit; contrast each unit supply water temperature, in the unit set with maximum unit supply water temperature, determine that a current operating unit is for shutting down unit.
Particularly, if the unit quantity n of current operating unit is more than or equal to predetermined number N (i.e. n>=N), then contrast the unit supply water temperature of each current operating unit, the unit getting unit supply water temperature at random the highest is shut down, i.e. T
for m=max (T
supply) unit.The average return water temperature T of all units (comprising this shutdown unit) when simultaneously recording this compressor emergency shutdown
return 0.Wherein, the unit supply water temperature of multiple stage unit can be had to reach peak, then random selecting one is shut down wherein simultaneously.
Step S205: control all current operating units and shut down.
Step S206: after shutdown compressor emergency shutdown first preset time period, detect in heat pump and remain the average supply water temperature of unit and average return water temperature.
Particularly, after shutdown compressor emergency shutdown first preset time period (as X second), the average supply water temperature of the residue unit in heat pump after compressor emergency shutdown and average return water temperature can be detected by sensor.
Step S207: judge in heat pump, whether the average supply water temperature of current operating unit is less than the first temperature threshold; If so, then perform step S208, if not, then perform step S201.
Particularly, the average supply water temperature T that contrast judges current operating unit in heat pump is continued
average water supplywith the first temperature threshold T
ifsize.If so, be T
average water supply< T
if, then the judgement of next step step S208 is entered; If not, i.e. T
average water supply>=T
if, then return and perform step S201 and re-start T
average water supplyjudgement.
Step S208: the temperature variation of average return water temperature in the second preset time period obtaining residue unit.
Particularly, the average return water temperature T of residue unit can be obtained by sensor and processor
average backwaterthe average return water temperature temperature rise δ (i.e. temperature variation δ) of (as in Y second) in the second preset time period.
Step S209: judge that the average return water temperature of residue unit is less than or equal to the second temperature threshold.If so, then perform step S210, if not, then return and perform step S201, namely obtain the supply water temperature of current operating unit, and rejudge the average supply water temperature of current operating unit and the relation of the first temperature threshold.
Particularly, the average return water temperature T of residue unit is judged
average backwaterwhether be less than or equal to the second temperature threshold (T
return 0-△ T), as average return water temperature T
average backwaterbe less than or equal to the second temperature threshold (T
return 0-△ T), i.e. T
average backwater≤ T
return 0-△ T, then enter the judgement of next step S210.As average return water temperature T
average backwaterbe greater than the second temperature threshold (T
return 0-△ T), i.e. T
average backwater> T
return 0-△ T, then return and perform step S201, obtain the supply water temperature of current operating unit, and rejudge the average supply water temperature of current operating unit and the relation of the first temperature threshold.
Step S210: judge whether temperature variation is less than change threshold, wherein, the second temperature threshold is less than or equal to the average return water temperature of current operating unit; If so, then perform step S211, and return execution S201, if not, then return and perform step S201.
Particularly, judge whether average return water temperature temperature rise δ (i.e. temperature variation) is less than change threshold (T
0).If in the second preset time period (as in Y second), average return water temperature temperature rise δ (i.e. temperature variation) is not less than change threshold (T
0), i.e. δ>=T
0, then return execution step S201 and again the average supply water temperature of current operating unit judged; If in the second preset time period (as in Y second), average return water temperature temperature rise δ (i.e. temperature variation) is less than change threshold (T
0), i.e. δ < T
0, then perform step S211, random unlatching one is standby, and then returns execution step S201, obtains the supply water temperature of current operating unit, and rejudges the average supply water temperature of current unit and the relation of the first temperature threshold.
Step S211: control a random unlatching unit in standby unit.
Adopt above-described embodiment; can by detecting return water temperature and the supply water temperature of multiple stage unit; realize multiple stage unit and carry out Drazin inverse according to its end load condition; realize varying duty demand for control; wherein, when shutting down, the first shutdown first reaching halt condition is first judged; then carry out judging whether also to need to continue to shut down other unit, realize the adjustment of the controllability of heating allowance before shutting down.And when starting shooting, after often opening a standby unit, judge the temperature rise (i.e. the variable quantity of average return water temperature) of return water temperature, judge whether to continue to open other standby unit according to the speed of temperature rise speed (i.e. variable quantity pace of change).By above-described embodiment, can realize determining frequency heat pump carries out start and stop allowance adjustment according to its machine group end load; The phenomenon of the frequent start-stop of unit can be avoided to occur simultaneously, thus improve the operational reliability of heat pump unit.
According to the embodiment of the present invention, provide a kind of device embodiment of control device of source pump, as shown in Figure 3, this control device comprises: first detection module 10, first determination module 30, second detection module 50 and the second determination module 70.
First detection module 10, for detecting the supply water temperature of current operating unit in heat pump.
First determination module 30, for based on the shutdown unit in the supply water temperature of current operating unit and the unit quantity determination heat pump of current operating unit.
Second detection module 50, for after shutdown compressor emergency shutdown first preset time period, detects in heat pump and remains the average supply water temperature of unit and average return water temperature.
Second determination module 70, for determining whether to open standby unit based on the average supply water temperature and average return water temperature that remain unit.
Adopt the above embodiment of the present invention, the shutdown unit of heat pump is determined by the supply water temperature of operating unit current in heat pump and the unit quantity of current operating unit, after shutdown first preset time period, determine whether to open standby unit by the average supply water temperature and average return water temperature that detect the residue unit in heat pump, thus can according to the end load situation of change of the unit of the operation in heat pump, control the start and stop situation of determining frequency unit, avoid all units and unify start and stop and the start and stop phenomenon too frequently caused, solve the problem to the regulating power difference that the end load of unit changes, achieve the regulating power improving and the end load of unit is changed, with determine frequency heat pump and carry out the adjustment of start and stop allowance according to load, and improve stability and the reliability of the heating of machine group end, add the level of comfort of user.
Alternatively, the first determination module comprises: the first judge module, first determines submodule and the first control module.
First judge module, for judging in heat pump, whether the average supply water temperature of current operating unit is more than or equal to the first temperature threshold.
First determines submodule, if be more than or equal to the first temperature threshold for the average supply water temperature of current operating unit, then the unit supply water temperature based on unit quantity and each current operating unit is determined to shut down unit.
First control module, if be less than the first temperature threshold for the average supply water temperature of current operating unit, then control current operating unit and continues to run.
Adopt above-described embodiment; can when controlling compressor emergency shutdown; first judge that the unit first reaching average supply water temperature and unit quantity term is first shut down, then carry out judging whether also to need to continue to stop other units, thus the effect that before realizing compressor emergency shutdown, heating allowance is adjustable.
Alternatively, first determines that submodule comprises: the second judge module, the first processing module and the second control module.
Second judge module, for judging whether unit quantity is more than or equal to predetermined number.
First processing module; if be more than or equal to predetermined number for unit quantity; then obtain the unit supply water temperature of each current operating unit, contrast each unit supply water temperature, in the unit set with maximum unit supply water temperature, determine that a current operating unit is for shutting down unit.
Second control module, if be less than predetermined number for unit quantity, then control all current operating units and shuts down.
In the above-described embodiments, after the supply water temperature detecting current operating unit in heat pump, first judge whether the average supply water temperature of current operating unit meets and be more than or equal to this condition of the first temperature threshold; If meet this condition, then judge whether unit quantity meets again and be more than or equal to predetermined number; If unit quantity is more than or equal to predetermined number, then in the unit set with maximum unit supply water temperature, determine that a current operating unit is for shutting down unit; If unit quantity is less than predetermined number, then heat pump controls all current operating unit shutdown.If average supply water temperature is less than the first temperature threshold, then controls current operating unit and continue to run.After shutdown compressor emergency shutdown first preset time period, determine whether to open standby unit based on the average supply water temperature of the residue unit detected and average return water temperature.By above-described embodiment, the operational factor that can realize according to current operating unit judges (comprising: unit quantity, average supply water temperature and average return water temperature) start and stop of unit more flexibly.
Alternatively, this control device also comprises acquisition module, for after determining the shutdown unit in heat pump, when shutting down compressor emergency shutdown, obtains the average return water temperature of current operating unit; Second determination module also comprises second and determines submodule, for based on residue unit average supply water temperature, residue the average return water temperature of unit and the average return water temperature of current operating unit determine whether to open standby unit.
In the above-described embodiments; after determining the shutdown unit in heat pump; heat pump is while compressor emergency shutdown is shut down in control; obtain the average return water temperature of current all units, and determine the situation of opening standby unit based on the average supply water temperature of the residue unit after the shutdown of heat pump and average return water temperature.Pass through above-described embodiment, can reach and determine whether to need to open standby unit according to the temperature parameter of the unit in heat pump, also namely heat pump can control the opening of unit according to the situation of its end load (i.e. load), thus avoid all units of unified unlatching when end load (load) step-down, and the problem that the cold and hot difference variation brought is excessive, the varying duty realized determining frequency unit controls, make end heating more stable, heating user feels more comfortable.
Alternatively, second determines that submodule comprises: the 3rd judge module, the second processing module and the 3rd determination module.
3rd judge module, for judging in heat pump, whether the average supply water temperature of current operating unit is less than the first temperature threshold.
Second processing module, if be less than the first temperature threshold for the average supply water temperature of operating unit current in heat pump, then obtain the temperature variation of average return water temperature in the second preset time period of residue unit, determine whether to open standby unit based on the average return water temperature of current operating unit and temperature variation.
3rd determination module, if be not less than the first temperature threshold for the average supply water temperature of operating unit current in heat pump, then determines not open standby unit.
In the above-described embodiments, after based on the shutdown unit in the supply water temperature of the current operating unit detected and the unit quantity determination heat pump of current operating unit, shut down compressor emergency shutdown first preset time period, then detect the average supply water temperature of residue unit and average return water temperature, then judge whether the average supply water temperature of current operating unit in heat pump meets the condition being less than the first temperature threshold; If meet this conditional average supply water temperature, then determine whether to open standby unit based on the average return water temperature of the current operating unit got and temperature variation; If average supply water temperature does not meet this condition, then determine not open standby unit.Adopt above-described embodiment, when heat pump controls to open standby unit, by after often opening a standby unit, judge the temperature rise (i.e. temperature variation) of the return water temperature of current operating unit, the speed of the speed increased according to temperature rise (i.e. temperature variation) judges whether to continue to open other unit in standby unit, thus realize flexibly according to the unlatching situation of the temperature variations determination unit of current operating unit, reach and determine frequency heat pump can carry out the allowance adjustment of opening object according to load.
Alternatively, the second processing module comprises: the 4th judge module, the 3rd control module and the 4th determination module.
4th judge module, if be less than or equal to the second temperature threshold for the average return water temperature remaining unit, then judge whether temperature variation is less than change threshold, wherein, the second temperature threshold is less than or equal to the average return water temperature of current operating unit.
3rd control module, if be less than change threshold for temperature variation, then controls a random unlatching unit in standby unit.
4th determination module, if be not less than change threshold for temperature variation, then determines not open standby unit.
In the above-described embodiments, detecting the supply water temperature of current operating unit in heat pump, and determining to shut down unit based on the unit quantity of this supply water temperature and current operating unit; After shutdown compressor emergency shutdown first preset time period, detect in heat pump and remain the average supply water temperature of unit and average return water temperature; Judge whether the average supply water temperature that this detects is less than the first temperature threshold; If this average supply water temperature is less than the first temperature threshold, then obtain the temperature variation of average return water temperature in the second preset time period of residue unit, if the average return water temperature of residue unit is less than or equal to the second temperature threshold, then judge whether temperature variation is less than change threshold; If temperature variation is less than change threshold, then controls a random unlatching unit in standby unit, if temperature variation is not less than change threshold, then determine not open standby unit.If the average supply water temperature of current operating unit is not less than the first temperature threshold in heat pump, then also determine not open standby unit.Pass through above-described embodiment, multiple stage unit can be realized and carry out the adjustment of Unit Commitment allowance according to its end load condition, thus meet the demand that machine group end varying duty is controlled, avoid the unified problem controlling the unit frequent start-stop that Unit Commitment brings simultaneously, and then improve reliability of operation.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed technology contents, the mode by other realizes.Wherein, device embodiment described above is only schematic, the such as division of described unit, can be that a kind of logic function divides, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the INDIRECT COUPLING of unit or module or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple unit.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, server or the network equipment etc.) perform method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, read-only storage (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. a control method for source pump, is characterized in that, comprising:
Detect the supply water temperature of current operating unit in heat pump;
The shutdown unit in described heat pump is determined based on the supply water temperature of described current operating unit and the unit quantity of described current operating unit;
After described shutdown compressor emergency shutdown first preset time period, detect in described heat pump the average supply water temperature and average return water temperature that remain unit;
Determine whether to open standby unit based on the average supply water temperature of described residue unit and described average return water temperature.
2. control method according to claim 1, is characterized in that, determines that the shutdown unit in described heat pump comprises based on the supply water temperature of described current operating unit and the unit quantity of described current operating unit:
Judge in described heat pump, whether the average supply water temperature of current operating unit is more than or equal to the first temperature threshold;
If the average supply water temperature of described current operating unit is more than or equal to described first temperature threshold, then determine described shutdown unit based on the unit supply water temperature of current operating unit described in described unit quantity and each;
If the average supply water temperature of described current operating unit is less than described first temperature threshold, then controls described current operating unit and continue to run.
3. control method according to claim 2, is characterized in that, determines that described shutdown unit comprises based on the unit supply water temperature of current operating unit described in described unit quantity and each:
Judge whether described unit quantity is more than or equal to predetermined number;
If described unit quantity is more than or equal to described predetermined number, then obtain the unit supply water temperature of current operating unit described in each, contrast unit supply water temperature described in each, in the unit set with maximum described unit supply water temperature, determine that a current operating unit is described shutdown unit;
If described unit quantity is less than described predetermined number, then controls all described current operating units and shut down.
4. control method according to claim 1, is characterized in that,
After determining the shutdown unit in described heat pump, described control method also comprises: when described shutdown compressor emergency shutdown, obtains the average return water temperature of described current operating unit;
Determine whether that opening standby unit comprises based on the average supply water temperature of described residue unit and described average return water temperature:
Average return water temperature based on the average supply water temperature of described residue unit, the average return water temperature of described residue unit and described current operating unit determines whether to open standby unit.
5. control method according to claim 4, is characterized in that, the average return water temperature based on the average supply water temperature of described residue unit, the average return water temperature of described residue unit and described current operating unit determines whether that opening standby unit comprises:
Judge in described heat pump, whether the average supply water temperature of current operating unit is less than the first temperature threshold;
If the average supply water temperature of current operating unit is less than described first temperature threshold in described heat pump, then obtain the temperature variation of average return water temperature in the second preset time period of described residue unit, determine whether to open standby unit based on the average return water temperature of described current operating unit and described temperature variation;
If the average supply water temperature of current operating unit is not less than described first temperature threshold in described heat pump, then determine not open described standby unit.
6. control method according to claim 5, is characterized in that, determines whether that opening standby unit comprises based on the average return water temperature of described current operating unit and described temperature variation:
If the average return water temperature of described residue unit is less than or equal to the second temperature threshold, then judge whether described temperature variation is less than change threshold, wherein, described second temperature threshold is less than or equal to the average return water temperature of described current operating unit;
If described temperature variation is less than change threshold, then control a random unlatching unit in described standby unit;
If described temperature variation is not less than change threshold, then determine not open described standby unit.
7. a control device for source pump, is characterized in that, comprising:
First detection module, for detecting the supply water temperature of current operating unit in heat pump;
First determination module, for determining the shutdown unit in described heat pump based on the supply water temperature of described current operating unit and the unit quantity of described current operating unit;
Second detection module, for after described shutdown compressor emergency shutdown first preset time period, detects in described heat pump the average supply water temperature and average return water temperature that remain unit;
Second determination module, for determining whether to open standby unit based on the average supply water temperature of described residue unit and described average return water temperature.
8. control device according to claim 7, is characterized in that, described first determination module comprises:
First judge module, for judging in described heat pump, whether the average supply water temperature of current operating unit is more than or equal to the first temperature threshold;
First determines submodule, if be more than or equal to described first temperature threshold for the average supply water temperature of described current operating unit, then determines described shutdown unit based on the unit supply water temperature of current operating unit described in described unit quantity and each;
First control module, if be less than described first temperature threshold for the average supply water temperature of described current operating unit, then control described current operating unit and continues to run.
9. control device according to claim 8, is characterized in that, described first determines that submodule comprises:
Second judge module, for judging whether described unit quantity is more than or equal to predetermined number;
First processing module, if be more than or equal to described predetermined number for described unit quantity, then obtain the unit supply water temperature of current operating unit described in each, contrast unit supply water temperature described in each, in the unit set with maximum described unit supply water temperature, determine that a current operating unit is described shutdown unit;
Second control module, if be less than described predetermined number for described unit quantity, then control all described current operating units and shuts down.
10. control device according to claim 7, is characterized in that, described control device also comprises:
Acquisition module, for after determining the shutdown unit in described heat pump, when described shutdown compressor emergency shutdown, obtains the average return water temperature of described current operating unit;
Described second determination module comprises second and determines submodule, for determining whether to open standby unit based on the average return water temperature of the average supply water temperature of described residue unit, the average return water temperature of described residue unit and described current operating unit.
11. control device according to claim 10, is characterized in that, described second determines that submodule comprises:
3rd judge module, for judging in described heat pump, whether the average supply water temperature of current operating unit is less than the first temperature threshold;
Second processing module, if the average supply water temperature for operating unit current in described heat pump is less than described first temperature threshold, then obtain the temperature variation of average return water temperature in the second preset time period of described residue unit, determine whether to open standby unit based on the average return water temperature of described current operating unit and described temperature variation;
3rd determination module, if be not less than described first temperature threshold for the average supply water temperature of operating unit current in described heat pump, then determines not open described standby unit.
12. control device according to claim 11, is characterized in that, described second processing module comprises:
4th judge module, if be less than or equal to the second temperature threshold for the average return water temperature of described residue unit, then judge whether described temperature variation is less than change threshold, wherein, described second temperature threshold is less than or equal to the average return water temperature of described current operating unit;
3rd control module, if be less than change threshold for described temperature variation, then controls a random unlatching unit in described standby unit;
4th determination module, if be not less than change threshold for described temperature variation, then determines not open described standby unit.
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| CN110686381B (en) * | 2019-10-15 | 2021-09-14 | 广东美的暖通设备有限公司 | Air conditioner control method and device and computer readable storage medium |
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