CN106352599A - Defrosting control method, defrosting control device and heat pump type air conditioner - Google Patents
Defrosting control method, defrosting control device and heat pump type air conditioner Download PDFInfo
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- CN106352599A CN106352599A CN201610838610.8A CN201610838610A CN106352599A CN 106352599 A CN106352599 A CN 106352599A CN 201610838610 A CN201610838610 A CN 201610838610A CN 106352599 A CN106352599 A CN 106352599A
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- Prior art keywords
- defrost
- time
- air conditioner
- defrosting control
- pump type
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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
- F25B30/00—Heat pumps
-
- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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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
-
- 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
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a defrosting control method, a defrosting control device and a heat pump type air conditioner. The defrosting control method comprises steps as follows: the heat pump type air conditioner operates in a heating mode for first preset time ts and continuously operates for interval time delta t, and then the temperature of a heat exchanger outlet is detected and recorded as Ti; after the interval time delta t, the temperature of the heat exchanger outlet is detected again and recorded as T(i+1); if a value obtained according to [T(i+1)-Ti]/delta t is smaller than a first preset value A, 1 is added to the cumulative number f; if the cumulative number f is larger than or equal to the preset times N, the heat pump type air conditioner is controlled to defrost. According to the defrosting control method provided by the invention, appropriate time is selected for defrosting according to detection, recording and calculation of the changing speed of the heat exchanger outlet in a control process. Therefore, the work efficiency of the air conditioner system is guaranteed, and defects of energy waste and insufficient heating capacity caused by reduction of the air conditioner system efficiency due to frosting are overcome.
Description
Technical field
The present invention relates to appliance field, in particular to a kind of defrosting control method, defrosting control device and pump type heat
Air-conditioning.
Background technology
In recent years, the popularity rate of pump type heat multi-split air conditioner progressively rises, and the continuous development of air-conditioning technical promotes air-conditioning
Property indices be very significantly improved.However, the low-temperature heating scarce capacity of heat pump multi-split air conditioner is still tired
Disturb a great problem of air conditioner industry.
Air conditioner low temperature heating scarce capacity is mainly caused by two aspect reasons, and one is that air-conditioning heating process follows reverse Kano
Circulation, runs under outdoor low temperature environment and is easy to frosting after heating a period of time, frosting makes the heating performance of system drastically
Decay；Two is the defrosting control program imperfection of air-conditioner, causes the unclean or frostless defrost of defrost so that heating the circulating cycle
Heating capacity in phase is constantly decayed, and has a strong impact on the normal operation of air conditioning system.Therefore how to realize the reasonable defrost of air-conditioner
Just become problem demanding prompt solution.
Content of the invention
In order to solve at least one above-mentioned technical problem, the embodiment of a first aspect of the present invention proposes a kind of defrost control
Method processed.
A second aspect of the present invention embodiment is it is also proposed that a kind of defrosting control device.
A third aspect of the present invention embodiment is it is also proposed that a kind of heat pump type air conditioner.
In view of this, embodiment according to the first aspect of the invention, the present invention proposes a kind of defrosting control method, uses
In heat pump type air conditioner, heat pump type air conditioner includes heat exchanger, and defrosting control method includes: step s102, heat pump type air conditioner is to heat
Mode operation first preset time t s；Step s104, after continuing to run with δ t interval time, detects heat exchanger outlet temperature, and remembers
Record as ti；Step s106, then after interval time δ t, detect heat exchanger outlet temperature again, and be recorded as t (i+1)；Step
Rapid s108, compares the size of [t (i+1)-ti]/δ t and the first preset value a；If the comparative result of step s108 be [t (i+1)-
Ti]/δ t be less than the first preset value a, then enter step s110；Step s110, cumulative number f adds 1, wherein, cumulative number f's
Initial value is 0；Step s112, compares the size of cumulative number f and preset times n；If the comparative result of step s112 is accumulative
Number of times f is more than or equal to preset times n, then enter step s114；Step s114, controls heat pump type air conditioner to start defrost.
The defrosting control method that the present invention provides, passes through detection in control process, records and calculate heat exchanger exit temperature
The changing value of degree and pace of change [t (i+1)-ti]/δ t are analyzing the maximum of the heating capacity in the cycle of heating, and control sky
Adjusting system enters defrost pattern when heating capacity reaches larger or maximum.So that air conditioning system can be entered in the suitable time
Row defrost is it is ensured that the work efficiency of air conditioning system, it is to avoid the energy that leads to because frosting causes air conditioning system efficiency to decline
Waste, heating capacity is not enough, more effectively improve air conditioning system heating the heating capacity in the cycle.And during interval therein
Between δ t and the first preset value a can be arranged according to actual condition, realize before air conditioning system work efficiency significantly declines beginning
Frost, so both ensure that air conditioning system will not lead to the decline of system work efficiency and the waste of the energy too late because of defrost,
Ensure that air conditioning system will not, defrost frequency too early because of defrost excessive and lead to that air conditioning system is actual to heat that the time is short, heating capacity
Deficiency and the waste of the energy.
In addition, the defrosting control method in above-described embodiment of present invention offer can also have following supplementary technology spy
Levy:
If it is preferable that the comparative result of step s112 is less than preset times n for cumulative number f in technique scheme,
Then reenter step s104.
In this technical scheme, become by the cycle detection for heat exchanger outlet temperature with for heat exchanger outlet temperature
The lasting judgement changing speed [t (i+1)-ti]/δ t, it is ensured that air conditioning system can start defrost in the suitable time, improves
The work efficiency of air conditioning system, it is to avoid the energy waste leading to because frosting causes air conditioning system efficiency to decline and heating capacity
Deficiency, is also effectively improved air conditioning system heating the heating capacity in the cycle.Air-conditioning can be adjusted by preset times n simultaneously
The defrost frequency of system, the motility of lifting air conditioning system defrosting control.
It is preferable that also including in technique scheme: air-conditioning is run after the first preset time t s with heating mode, holds
The detection number of times of continuous record heat exchanger outlet temperature, and record result is designated as detecting number of times m；If the comparative result of step s108
It is more than or equal to the first preset value a for [t (i+1)-ti]/δ t, then enter step s202；Step s202, comparison system run time
Ta and the size of the second preset time t m, wherein, system operation time ta=ts+ δ t × m；If the comparative result of step s202
It is more than the second preset time t m for system operation time ta, then enter step s204；Step s204, compares t (i+1) and the first threshold
The size of value；If the comparative result of step s204 is t (i+1) is less than first threshold, enter step s114, that is, control pump type heat
Air-conditioning starts defrost.
In this technical scheme, on the basis of for heat exchanger outlet temperature detection mode, also with the fortune of air conditioning system
The criterion of row time defrost as whether.Thereby ensure that when heat exchanger outlet temperature t (i+1) is less than first threshold,
Even if heat exchanger outlet temperature rate of change is not up to defrost condition, this air conditioning system also can periodicity defrost, it is to avoid defrost
Not in time or defrost postpones the decay of brought system heating capacity, it also avoid causing air conditioning system efficiency because of frosting simultaneously
Decline and the energy waste that leads to and heating capacity are not enough, be also effectively improved air conditioning system heating heating in the cycle
Amount.
If it is preferable that the comparative result of step s202 is less than or equal to for system operation time ta in technique scheme
Second preset time t m, then reenter step s104.
In this technical scheme, when run time ta of air conditioning system is not up to the second preset time t m, inspection capable of circulation
Survey heat exchanger outlet temperature, until meet carrying out defrost during defrost condition.By for the cycle detection of defrost condition and judgement,
Enable this air conditioning system to select suitable defrost opportunity to carry out defrost, thereby ensure that the work efficiency of air conditioning system, keep away
Exempt from energy waste and the heating capacity deficiency leading to because frosting causes air conditioning system efficiency to decline.So both ensure that air-conditioning
System will not lead to the decline of system work efficiency and the waste of the energy too late because of defrost, also ensure that air conditioning system will not be because
Defrost is too early, defrost frequency is excessive and leads to that air conditioning system is actual to heat that the time is too short, heating capacity is not enough and the waste of the energy.
If it is preferable that the comparative result of step s204 is t (i+1) is more than or equal to first threshold in technique scheme,
Then reenter step s104.
In this technical scheme, when t (i+1) is more than first threshold it is believed that the temperature of heat exchanger exit is higher, and
Temporarily do not need defrost, and then cycle detection heat exchanger outlet temperature, until meet carrying out defrost during defrost condition.By for
The cycle detection of defrost condition and judgement, so that this air conditioning system can select suitable defrost opportunity to carry out defrost, are thus protected
Demonstrate,prove the work efficiency of air conditioning system, it is to avoid the energy waste that leads to because frosting causes air conditioning system efficiency to decline and heating
Scarce capacity.So both ensure that air conditioning system will not lead to the decline of system work efficiency and the wave of the energy too late because of defrost
Take, also ensure that air conditioning system will not, defrost frequency too early because of defrost excessive and lead to air conditioning system actual heat the time too short,
Heating capacity is not enough and the waste of the energy.
In technique scheme it is preferable that at the end of defrost, will be all clear for the data of cumulative number f and detection number of times m
Zero, and reenter described step s102.
In this technical scheme, at the end of defrost, the data of cumulative number f and detection number of times m is all reset, again examines
Survey heat exchanger outlet temperature, enter next defrost cycle of operation.By arranging defrost cycle of operation so that air conditioning system can
Constantly carry out defrost when meeting suitable defrost condition, in time frosting is processed clean, it is to avoid the sky leading to because of frosting
The work efficiency drop of adjusting system and the waste of the energy, and effectively carry heating under conditions of in the cycle, heating capacity is as big as possible
The heating capacity of high air conditioning system.
The defrosting control method that the embodiment of a first aspect of the present invention is proposed is in order to realize heating system in the cycle
Put forward on the basis of heat maximum, in this defrosting control method, combine time-temperature defrosting control method, it is to avoid defrost
Not in time or defrost postpones the decay of brought system heating capacity.
A second aspect of the present invention embodiment it is also proposed that a kind of defrosting control device, for heat pump type air conditioner, pump type heat
Air-conditioning includes heat exchanger, and defrosting control device includes: timing unit, for carrying out timing to the operating condition of heat pump type air conditioner；
Detector unit, for heat pump type air conditioner with heating mode run the first preset time t s after and continue to run with δ t interval time
When, the temperature of detection heat exchanger exit；Recording unit, for running the first preset time t s in heat pump type air conditioner with heating mode
Afterwards and when continuing to run with δ t interval time, the testing result of detector unit is recorded as ti；Detector unit is additionally operable to: record ti
Afterwards again when δ t interval time, detect heat exchanger outlet temperature again；Recording unit is additionally operable to: between passing through after record ti again
When time δ t, the testing result of detector unit is recorded as t (i+1)；Comparing unit, is used for comparing [t (i+1)-ti]/δ t
Size with the first preset value a；Recording unit is additionally operable to: record cumulative number f, and when [t (i+1)-ti]/δ t is less than first
During preset value a, cumulative number f is added 1 and records, wherein, the initial value of cumulative number f is 0；Comparing unit is additionally operable to: compares
Cumulative number f and the size of preset times n；Control unit, for when cumulative number f is more than or equal to preset times n, controlling heat
Pump-type air-conditioning starts defrost.
The present invention provide defrosting control device, by detection, record and calculate heat exchanger outlet temperature changing value and
Pace of change [t (i+1)-ti]/δ t is analyzing the maximum of the heating capacity in the cycle of heating, and controls air conditioning system heating
Defrost pattern is entered when amount reaches larger or maximum.So that air conditioning system can carry out defrost in the suitable time it is ensured that
The work efficiency of air conditioning system, it is to avoid the energy waste that leads to because frosting causes air conditioning system efficiency to decline, heat energy
Power is not enough, more effectively improves air conditioning system heating the heating capacity in the cycle.And δ t and first interval time therein
Preset value a can be arranged according to actual condition, realize starting defrost before air conditioning system work efficiency significantly declines, so both protect
Demonstrate,prove air conditioning system and will not lead to the decline of system work efficiency and the waste of the energy too late because of defrost, also ensure that air-conditioning system
System will not, defrost frequency too early because of defrost excessive and lead to that air conditioning system is actual to heat that the time is short, heating capacity is not enough and the energy
Waste.
In addition, the defrosting control device in above-described embodiment of present invention offer can also have following supplementary technology spy
Levy:
It is preferable that detector unit is additionally operable in technique scheme: when cumulative number f is less than preset times n, then
After interval time δ t, detection ti and t (i+1) again.Recording unit is additionally operable to: records ti and t (i+1) again detecting.
In this technical scheme, become by the cycle detection for heat exchanger outlet temperature with for heat exchanger outlet temperature
The lasting judgement changing speed [t (i+1)-ti]/δ t, it is ensured that air conditioning system can start defrost in the suitable time, improves
The work efficiency of air conditioning system, it is to avoid the energy waste leading to because frosting causes air conditioning system efficiency to decline and heating capacity
Deficiency, is also effectively improved air conditioning system heating the heating capacity in the cycle.Air-conditioning can be adjusted by preset times n simultaneously
The defrost frequency of system, the motility of lifting air conditioning system defrosting control.
It is preferable that recording unit is additionally operable in technique scheme: air-conditioning runs the first Preset Time with heating mode
After ts, persistently record the detection number of times of heat exchanger outlet temperature, and record result is designated as detecting number of times m；Comparing unit is also used
In: when [t (i+1)-ti]/δ t is more than or equal to the first preset value a, then comparison system run time ta and the second Preset Time
The size of tm, wherein, system operation time ta=ts+ δ t × m；Comparing unit is additionally operable to: between when the system is operated, ta is more than the
During two preset time t m, compare the size of t (i+1) and first threshold；Control unit is additionally operable to: when t (i+1) is less than first threshold
When, control heat pump type air conditioner to start defrost.
In this technical scheme, on the basis of for heat exchanger outlet temperature detection mode, also with the fortune of air conditioning system
The criterion of row time defrost as whether.Thereby ensure that when heat exchanger outlet temperature t (i+1) is less than first threshold,
Even if heat exchanger outlet temperature rate of change is not up to defrost condition, this air conditioning system also can periodicity defrost, it is to avoid defrost
Not in time or defrost postpones the decay of brought system heating capacity, it also avoid causing air conditioning system efficiency because of frosting simultaneously
Decline and the energy waste that leads to and heating capacity are not enough, be also effectively improved air conditioning system heating heating in the cycle
Amount.
It is preferable that detector unit is additionally operable in technique scheme: between when the system is operated, ta is pre- less than or equal to second
If during time tm, after δ t interval time that reruns, detection ti and t (i+1) again；Recording unit is additionally operable to: record detects again
Ti and t (i+1).
In this technical scheme, when run time ta of air conditioning system is not up to the second preset time t m, inspection capable of circulation
Survey heat exchanger outlet temperature, until meet carrying out defrost during defrost condition.By for the cycle detection of defrost condition and judgement,
Enable this air conditioning system to select suitable defrost opportunity to carry out defrost, thereby ensure that the work efficiency of air conditioning system, keep away
Exempt from energy waste and the heating capacity deficiency leading to because frosting causes air conditioning system efficiency to decline.So both ensure that air-conditioning
System will not lead to the decline of system work efficiency and the waste of the energy too late because of defrost, also ensure that air conditioning system will not be because
Defrost is too early, defrost frequency is excessive and leads to that air conditioning system is actual to heat that the time is too short, heating capacity is not enough and the waste of the energy.
It is preferable that detector unit is additionally operable in technique scheme: when t (i+1) is more than or equal to first threshold, then
After interval time δ t, detection ti and t (i+1) again；Recording unit is additionally operable to: records ti and t (i+1) again detecting.
In this technical scheme, when t (i+1) is more than first threshold it is believed that the temperature of heat exchanger exit is higher, and
Temporarily do not need defrost, and then cycle detection heat exchanger outlet temperature, until meet carrying out defrost during defrost condition.By for
The cycle detection of defrost condition and judgement, so that this air conditioning system can select suitable defrost opportunity to carry out defrost, are thus protected
Demonstrate,prove the work efficiency of air conditioning system, it is to avoid the energy waste that leads to because frosting causes air conditioning system efficiency to decline and heating
Scarce capacity.So both ensure that air conditioning system will not lead to the decline of system work efficiency and the wave of the energy too late because of defrost
Take, also ensure that air conditioning system will not, defrost frequency too early because of defrost excessive and lead to air conditioning system actual heat the time too short,
Heating capacity is not enough and the waste of the energy.
It is preferable that detector unit is additionally operable in technique scheme: after defrost terminates, heat pump type air conditioner is to heat
After pattern runs the first preset time t s again and when continuing to run with δ t interval time, detection ti and t (i+1) again；Label
Unit is additionally operable to: at the end of defrost, by cumulative number f and detection number of times m data all reset, and record the ti again detecting and
t(i+1).
In this technical scheme, at the end of defrost, the data of cumulative number f and detection number of times m is all reset, again examines
Survey heat exchanger outlet temperature, enter next defrost cycle of operation.By arranging defrost cycle of operation so that air conditioning system can
Constantly carry out defrost when meeting suitable defrost condition, in time frosting is processed clean, it is to avoid the sky leading to because of frosting
The work efficiency drop of adjusting system and the waste of the energy, and effectively carry heating under conditions of in the cycle, heating capacity is as big as possible
The heating capacity of high air conditioning system.
The heat pump type air conditioner that the embodiment of third aspect present invention provides, including the defrosting control dress of second aspect embodiment
Put.
The heat pump type air conditioner that the present invention provides, is made with calculating by the detection of heat exchanger outlet temperature and its rate of change
For a kind of criterion of air conditioning system defrost, and also add system operation time as another kind of air conditioning system defrost
Criterion is so that air conditioning system can carry out defrost in the suitable time it is ensured that the work efficiency of air conditioning system, it is to avoid
The energy waste leading to because frosting causes air conditioning system efficiency to decline, heating capacity are not enough, more effectively improve air-conditioning system
System is heating the heating capacity in the cycle.And also by arranging defrost circulation so that air conditioning system constantly can meet conjunction
Carry out defrost during suitable defrost condition, in time will frosting process clean, it is to avoid under the air conditioning system work efficiency causing because of frosting
Fall and energy waste.
The additional aspect of the present invention and advantage will become obvious in following description section, or by the practice of the present invention
Recognize.
Brief description
The above-mentioned and/or additional aspect of the present invention and advantage will become from reference to the description to embodiment for the accompanying drawings below
Substantially and easy to understand, wherein:
Fig. 1 be during air conditioner heat-production heating capacity with the variation diagram of the time that heats；
Fig. 2 is the schematic flow diagram of an embodiment of the present invention；
Fig. 3 is the schematic block diagram of an embodiment of the present invention.
Specific embodiment
In order to be more clearly understood that the above objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specifically real
Mode of applying is further described in detail to the present invention.It should be noted that in the case of not conflicting, the enforcement of the application
Feature in example and embodiment can be mutually combined.
Elaborate a lot of details in the following description in order to fully understand the present invention, but, the present invention also may be used
To be implemented different from other modes described here using other, therefore, protection scope of the present invention is not described below
Specific embodiment restriction.
Fig. 1 shows that heating capacity is with the change of the time that heats, wherein, the derivative δ q/ δ of ti point during air conditioner heat-production
T reflects the rate of change of heating capacity q.Relatively, dt/dt also can reflect the operating mode of air conditioning system, and wherein t is evaporation temperature
Degree.It is apparent from from Fig. 1, after air-conditioner runs a period of time, heating capacity can decline, and its main cause is exactly frosting.
Referring to Fig. 2 description defrosting control method described according to some embodiments of the invention.
As shown in Fig. 2 the invention provides a kind of defrosting control method, for heat pump type air conditioner, heat pump type air conditioner includes
Heat exchanger, defrosting control method includes: step s102, and heat pump type air conditioner runs the first preset time t s with heating mode；Step
S104, after continuing to run with δ t interval time, detects heat exchanger outlet temperature, and is recorded as ti；Step s106, then through super-interval
After time δ t, detect heat exchanger outlet temperature again, and be recorded as t (i+1)；Step s108, compares [t (i+1)-ti]/δ t
Size with the first preset value a；If the comparative result of step s108 is [t (i+1)-ti]/δ t is less than the first preset value a, enter
Enter step s110；Step s110, cumulative number f adds 1, and wherein, the initial value of cumulative number f is 0；Step s112, relatively more accumulative
Number of times f and the size of preset times n；If the comparative result of step s112 is more than or equal to preset times n for cumulative number f, enter
Enter step s114；Step s114, controls heat pump type air conditioner to start defrost.
The defrosting control method that the present invention provides, passes through detection in control process, records and calculate heat exchanger exit temperature
The changing value of degree and pace of change [t (i+1)-ti]/δ t are analyzing the maximum of the heating capacity in the cycle of heating, and control sky
Adjusting system enters defrost pattern when heating capacity reaches larger or maximum.So that air conditioning system can be entered in the suitable time
Row defrost is it is ensured that the work efficiency of air conditioning system, it is to avoid the energy that leads to because frosting causes air conditioning system efficiency to decline
Waste, heating capacity is not enough, more effectively improve air conditioning system heating the heating capacity in the cycle.And during interval therein
Between δ t and the first preset value a can be arranged according to actual condition, realize before air conditioning system work efficiency significantly declines beginning
Frost, so both ensure that air conditioning system will not lead to the decline of system work efficiency and the waste of the energy too late because of defrost,
Ensure that air conditioning system will not, defrost frequency too early because of defrost excessive and lead to that air conditioning system is actual to heat that the time is short, heating capacity
Deficiency and the waste of the energy.Wherein, the first preset time t s, δ t interval time, the first preset value a all can be according to actual works
The requirement of condition and system is configured, and which increases the motility of refrigeration system defrosting control.
In one embodiment of the invention, if as shown in Figure 2 it is preferable that the comparative result of step s112 is accumulative time
Number f is less than preset times n, then reenter step s104.
In this embodiment, by the cycle detection for heat exchanger outlet temperature with for heat exchanger outlet temperature change
The lasting judgement of speed [t (i+1)-ti]/δ t, it is ensured that air conditioning system can start defrost in the suitable time, improves sky
The work efficiency of adjusting system, it is to avoid the energy waste leading to because frosting causes air conditioning system efficiency to decline and heating capacity are not
Foot, is also effectively improved air conditioning system heating the heating capacity in the cycle.Air-conditioning system can be adjusted by preset times n simultaneously
The defrost frequency of system, the motility of lifting air conditioning system defrosting control.
In one embodiment of the invention, as shown in Figure 2 it is preferable that also including: air-conditioning runs first with heating mode
After preset time t s, persistently record the detection number of times of heat exchanger outlet temperature, and record result is designated as detecting number of times m；If step
The comparative result of rapid s108 is that [t (i+1)-ti]/δ t is more than or equal to the first preset value a, then enter step s202；Step s202,
Comparison system run time ta and the size of the second preset time t m, wherein, system operation time ta=ts+ δ t × m；If step
The comparative result of rapid s202 is more than the second preset time t m for system operation time ta, then enter step s204；Step s204, than
Size compared with t (i+1) and first threshold；If the comparative result of step s204 is t (i+1) is less than first threshold, enter step
S114, that is, control heat pump type air conditioner to start defrost.
In this embodiment, on the basis of for heat exchanger outlet temperature detection mode, also with the operation of air conditioning system
The criterion of time defrost as whether.Thereby ensure that when heat exchanger outlet temperature t (i+1) is less than first threshold, that is,
Heat exchanger outlet temperature rate of change is made to be not up to defrost condition, this air conditioning system also can periodicity defrost, it is to avoid defrost is not
Timely or defrost postpones the decay of brought system heating capacity, it also avoid causing under air conditioning system efficiency because of frosting simultaneously
Fall and the energy waste that leads to and heating capacity are not enough, be also effectively improved air conditioning system heating the heating capacity in the cycle.
Wherein, first threshold can be set according to actual condition, is such as set as subzero 15 DEG C.
In one embodiment of the invention, if as shown in Figure 2 it is preferable that the comparative result of step s202 is transported for system
Row time ta is less than or equal to the second preset time t m, then reenter step s104.
In this embodiment, when run time ta of air conditioning system is not up to the second preset time t m, detection capable of circulation
Heat exchanger outlet temperature, until meet carry out defrost during defrost condition.By for the cycle detection of defrost condition and judgement, making
Obtaining this air conditioning system can select suitable defrost opportunity to carry out defrost, thereby ensure that the work efficiency of air conditioning system, it is to avoid
The energy waste leading to because frosting causes air conditioning system efficiency to decline and heating capacity are not enough.So both ensure that air-conditioning system
System will not lead to the decline of system work efficiency and the waste of the energy too late because of defrost, also ensure that air conditioning system will not be because changing
Frost is too early, defrost frequency is excessive and lead to that air conditioning system is actual to heat that the time is too short, heating capacity is not enough and the waste of the energy.Its
In, the second preset time t m can be configured according to the requirement of actual condition and system, which increases refrigeration system defrost control
The motility of system.
In one embodiment of the invention, if as shown in Figure 2 it is preferable that the comparative result of step s204 is t (i+1)
More than or equal to first threshold, then reenter step s104.
In this embodiment, when t (i+1) is more than first threshold it is believed that the temperature of heat exchanger exit is higher, and temporary
When do not need defrost, and then cycle detection heat exchanger outlet temperature, until meet carry out defrost during defrost condition.By for change
The cycle detection of ice-lolly part and judgement, so that this air conditioning system can select suitable defrost opportunity to carry out defrost, thereby guarantee that
The work efficiency of air conditioning system, it is to avoid the energy waste that leads to because frosting causes air conditioning system efficiency to decline and heat energy
Power is not enough.So both ensure that air conditioning system will not lead to the decline of system work efficiency and the wave of the energy too late because of defrost
Take, also ensure that air conditioning system will not, defrost frequency too early because of defrost excessive and lead to air conditioning system actual heat the time too short,
Heating capacity is not enough and the waste of the energy.
In one embodiment of the invention, as shown in Figure 2 it is preferable that at the end of defrost, by cumulative number f and inspection
The data surveying number of times m all resets, and reenters described step s102.
In this embodiment, at the end of defrost, the data of cumulative number f and detection number of times m is all reset, again detects
Heat exchanger outlet temperature, enters next defrost cycle of operation.By arranging defrost cycle of operation so that air conditioning system can be held
Continuous ground carries out defrost when meeting suitable defrost condition, processes frosting clean in time, it is to avoid the air-conditioning leading to because of frosting
The work efficiency drop of system and the waste of the energy, and effectively improve heating under conditions of in the cycle, heating capacity is as big as possible
The heating capacity of air conditioning system.
The defrosting control method that the embodiment of a first aspect of the present invention is proposed is in order to realize heating system in the cycle
Put forward on the basis of heat maximum, in this defrosting control method, combine time-temperature defrosting control method, it is to avoid defrost
Not in time or defrost postpones the decay of brought system heating capacity.
The defrosting control device that the embodiment of second aspect present invention provides, as shown in Figure 3, for heat pump type air conditioner,
Heat pump type air conditioner includes heat exchanger, and defrosting control device includes: timing unit 302, for the operating condition to heat pump type air conditioner
Carry out timing；Detector unit 304, for heat pump type air conditioner with heating mode run the first preset time t s after and continue to run with
During δ t interval time, the temperature of detection heat exchanger exit；Recording unit 306, for being run with heating mode in heat pump type air conditioner
After first preset time t s and when continuing to run with δ t interval time, the testing result of detector unit 304 is recorded as ti；Detection
Unit 304 is additionally operable to: after record ti again when δ t interval time, detects heat exchanger outlet temperature again；Recording unit 306
It is additionally operable to: after record ti again when δ t interval time, the testing result of detector unit 304 is recorded as t (i+1)；Relatively more single
Unit 308, is used for comparing the size of [t (i+1)-ti]/δ t and the first preset value a；Recording unit 306 is additionally operable to: accumulative time of record
Number f, and when [t (i+1)-ti]/δ t is less than the first preset value a, cumulative number f is added 1 and records, wherein, cumulative number f
Initial value be 0；Comparing unit 308 is additionally operable to: compares the size of cumulative number f and preset times n；Control unit 310, is used for
When cumulative number f is more than or equal to preset times n, heat pump type air conditioner is controlled to start defrost.
The present invention provide defrosting control device, by detection, record and calculate heat exchanger outlet temperature changing value and
Pace of change [t (i+1)-ti]/δ t is analyzing the maximum of the heating capacity in the cycle of heating, and controls air conditioning system heating
Defrost pattern is entered when amount reaches larger or maximum.So that air conditioning system can carry out defrost in the suitable time it is ensured that
The work efficiency of air conditioning system, it is to avoid the energy waste that leads to because frosting causes air conditioning system efficiency to decline, heat energy
Power is not enough, more effectively improves air conditioning system heating the heating capacity in the cycle.And δ t and first interval time therein
Preset value a can be arranged according to actual condition, realize starting defrost before air conditioning system work efficiency significantly declines, so both protect
Demonstrate,prove air conditioning system and will not lead to the decline of system work efficiency and the waste of the energy too late because of defrost, also ensure that air-conditioning system
System will not, defrost frequency too early because of defrost excessive and lead to that air conditioning system is actual to heat that the time is short, heating capacity is not enough and the energy
Waste.Wherein, the first preset time t s, δ t interval time, the first preset value a all can according to actual condition and system will
Ask and be configured, which increases the motility of refrigeration system defrosting control.
In one embodiment of the invention it is preferable that detector unit 304 is additionally operable to: when cumulative number f is less than default time
During number n, after δ t interval time that reruns, detection ti and t (i+1) again.Recording unit 306 is additionally operable to: record detects again
Ti and t (i+1).
In this embodiment, by the cycle detection for heat exchanger outlet temperature with for heat exchanger outlet temperature change
The lasting judgement of speed [t (i+1)-ti]/δ t, it is ensured that air conditioning system can start defrost in the suitable time, improves sky
The work efficiency of adjusting system, it is to avoid the energy waste leading to because frosting causes air conditioning system efficiency to decline and heating capacity are not
Foot, is also effectively improved air conditioning system heating the heating capacity in the cycle.Air-conditioning system can be adjusted by preset times n simultaneously
The defrost frequency of system, the motility of lifting air conditioning system defrosting control.
In one embodiment of the invention it is preferable that recording unit 306 is additionally operable to: air-conditioning runs the with heating mode
After one preset time t s, persistently record the detection number of times of heat exchanger outlet temperature, and record result is designated as detecting number of times m；Than
Be additionally operable to compared with unit 308: when [t (i+1)-ti]/δ t is more than or equal to the first preset value a, then comparison system run time ta with
The size of the second preset time t m, wherein, system operation time ta=ts+ δ t × m；Comparing unit 308 is additionally operable to: works as system
When run time ta is more than the second preset time t m, compare the size of t (i+1) and first threshold；Control unit 310 is additionally operable to:
When t (i+1) is less than first threshold, heat pump type air conditioner is controlled to start defrost.
In this embodiment, on the basis of for heat exchanger outlet temperature detection mode, also with the operation of air conditioning system
The criterion of time defrost as whether.Thereby ensure that when heat exchanger outlet temperature t (i+1) is less than first threshold, that is,
Heat exchanger outlet temperature rate of change is made to be not up to defrost condition, this air conditioning system also can periodicity defrost, it is to avoid defrost is not
Timely or defrost postpones the decay of brought system heating capacity, it also avoid causing under air conditioning system efficiency because of frosting simultaneously
Fall and the energy waste that leads to and heating capacity are not enough, be also effectively improved air conditioning system heating the heating capacity in the cycle.
Wherein, first threshold can be set according to actual condition, is such as set as subzero 15 DEG C.
In one embodiment of the invention it is preferable that detector unit 304 is additionally operable to: between when the system is operated, ta is less than
During equal to the second preset time t m, after δ t interval time that reruns, detection ti and t (i+1) again；Recording unit 306 is also used
In: record ti and t (i+1) again detecting.
In this embodiment, when run time ta of air conditioning system is not up to the second preset time t m, detection capable of circulation
Heat exchanger outlet temperature, until meet carry out defrost during defrost condition.By for the cycle detection of defrost condition and judgement, making
Obtaining this air conditioning system can select suitable defrost opportunity to carry out defrost, thereby ensure that the work efficiency of air conditioning system, it is to avoid
The energy waste leading to because frosting causes air conditioning system efficiency to decline and heating capacity are not enough.So both ensure that air-conditioning system
System will not lead to the decline of system work efficiency and the waste of the energy too late because of defrost, also ensure that air conditioning system will not be because changing
Frost is too early, defrost frequency is excessive and lead to that air conditioning system is actual to heat that the time is too short, heating capacity is not enough and the waste of the energy.Its
In, the second preset time t m can be configured according to the requirement of actual condition and system, which increases refrigeration system defrost control
The motility of system.
In one embodiment of the invention it is preferable that detector unit 304 is additionally operable to: when t (i+1) is more than or equal to first
During threshold value, after δ t interval time that reruns, detection ti and t (i+1) again；Recording unit 306 is additionally operable to: record detects again
Ti and t (i+1).
In this embodiment, when t (i+1) is more than first threshold it is believed that the temperature of heat exchanger exit is higher, and temporary
When do not need defrost, and then cycle detection heat exchanger outlet temperature, until meet carry out defrost during defrost condition.By for change
The cycle detection of ice-lolly part and judgement, so that this air conditioning system can select suitable defrost opportunity to carry out defrost, thereby guarantee that
The work efficiency of air conditioning system, it is to avoid the energy waste that leads to because frosting causes air conditioning system efficiency to decline and heat energy
Power is not enough.So both ensure that air conditioning system will not lead to the decline of system work efficiency and the wave of the energy too late because of defrost
Take, also ensure that air conditioning system will not, defrost frequency too early because of defrost excessive and lead to air conditioning system actual heat the time too short,
Heating capacity is not enough and the waste of the energy.
In one embodiment of the invention it is preferable that detector unit 304 is additionally operable to: after defrost terminates, pump type heat is empty
When tune is run again after the first preset time t s and continued to run with δ t interval time with heating mode, again detect ti and t (i+
1)；Recording unit 306 is additionally operable to: at the end of defrost, the data of cumulative number f and detection number of times m is all reset, and records weight
Ti and t (i+1) of new detection.
In this embodiment, at the end of defrost, the data of cumulative number f and detection number of times m is all reset, again detects
Heat exchanger outlet temperature, enters next defrost cycle of operation.By arranging defrost cycle of operation so that air conditioning system can be held
Continuous ground carries out defrost when meeting suitable defrost condition, processes frosting clean in time, it is to avoid the air-conditioning leading to because of frosting
The work efficiency drop of system and the waste of the energy, and effectively improve heating under conditions of in the cycle, heating capacity is as big as possible
The heating capacity of air conditioning system.
The heat pump type air conditioner that the embodiment of third aspect present invention provides, including the defrosting control dress of second aspect embodiment
Put.
The heat pump type air conditioner that the present invention provides, is made with calculating by the detection of heat exchanger outlet temperature and its rate of change
For the criterion of air conditioning system defrost, and also add system operation time as the judgement mark of another air conditioning system defrost
Accurate so that air conditioning system can carry out defrost in the suitable time it is ensured that the work efficiency of air conditioning system, it is to avoid because of frosting
The energy waste causing air conditioning system efficiency to decline and leading to, heating capacity are not enough, more effectively improve air conditioning system in system
Heating capacity in heat cycle.And also by arranging defrost circulation so that air conditioning system constantly can meet suitableization
Carry out defrost during ice-lolly part, in time frosting is processed clean, it is to avoid the air conditioning system work efficiency drop causing because of frosting and energy
Source wastes.This heat pump type air conditioner can be pump type heat multi-split air conditioner.
In the present invention, term " multiple " then refers to two or more, limits unless otherwise clear and definite.Term " peace
Dress ", " being connected ", " connection ", the term such as " fixation " all should be interpreted broadly, for example, " connection " can be fixedly connected it is also possible to
It is to be detachably connected, or be integrally connected；" being connected " can be joined directly together it is also possible to be indirectly connected to by intermediary.Right
For those of ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the description of this specification, the description of term " embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that the specific features with reference to this embodiment or example description, structure, material or feature are contained at least one reality of the present invention
Apply in example or example.In this manual, identical embodiment or reality are not necessarily referring to the schematic representation of above-mentioned term
Example.And, the specific features of description, structure, material or feature can in any one or more embodiments or example with
Suitable mode combines.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (13)
1. a kind of defrosting control method, for heat pump type air conditioner it is characterised in that described heat pump type air conditioner includes heat exchanger, institute
State defrosting control method to include:
Step s102, described heat pump type air conditioner runs the first preset time t s with heating mode；
Step s104, after continuing to run with δ t interval time, detects described heat exchanger outlet temperature, and is recorded as ti；
Step s106, then after described interval time δ t, detect described heat exchanger outlet temperature again, and be recorded as t (i+
1)；
Step s108, compares the size of [t (i+1)-ti]/δ t and the first preset value a；
If the comparative result of described step s108 is [t (i+1)-ti]/δ t is less than described first preset value a, enter step
s110；
Described step s110, cumulative number f adds 1, and wherein, the initial value of described cumulative number f is 0；
Step s112, the relatively size of described cumulative number f and preset times n；
If the comparative result of described step s112 is more than or equal to described preset times n for cumulative number f, enter step s114；
Described step s114, controls described heat pump type air conditioner to start defrost.
2. defrosting control method according to claim 1 it is characterised in that
If the comparative result of described step s112 is described cumulative number f is less than described preset times n, reenter described step
Rapid s104.
3. defrosting control method according to claim 1 is it is characterised in that also include:
Described air-conditioning is run after described first preset time t s with heating mode, persistently records the inspection of described heat exchanger outlet temperature
Survey number of times, and record result is designated as detecting number of times m；
If the comparative result of described step s108 is [t (i+1)-ti]/δ t is more than or equal to described first preset value a, enter step
Rapid s202；
Described step s202, the size of comparison system run time ta and the second preset time t m, wherein, during described system operation
Between ta=ts+ δ t × m；
If the comparative result of described step s202 is described system operation time ta is more than described second preset time t m, enter
Step s204；
Described step s204, compares the size of t (i+1) and first threshold；
If the comparative result of described step s204 is t (i+1) is less than described first threshold, enters described step s114, that is, control
Make described heat pump type air conditioner and start defrost.
4. defrosting control method according to claim 3 it is characterised in that
If the comparative result of described step s202 is described system operation time ta is less than or equal to described second preset time t m,
Reenter step s104.
5. defrosting control method according to claim 4 it is characterised in that
If the comparative result of described step s204 is t (i+1) is more than or equal to first threshold, reenter described step s104.
6. defrosting control method according to any one of claim 1 to 5 it is characterised in that
At the end of defrost, the data of described cumulative number f and described detection number of times m is all reset, and reenters described step
Rapid s102.
7. a kind of defrosting control device, for heat pump type air conditioner it is characterised in that described heat pump type air conditioner includes heat exchanger, institute
State defrosting control device to include:
Timing unit, for carrying out timing to the operating condition of described heat pump type air conditioner；
Detector unit, for described heat pump type air conditioner with heating mode run the first preset time t s after and continue to run with interval
During time δ t, detect the temperature of described heat exchanger exit；
Recording unit, for described heat pump type air conditioner with heating mode run the first preset time t s after and continue to run with interval
During time δ t, the testing result of described detector unit is recorded as ti；
Described detector unit is additionally operable to: after record ti again when δ t interval time, detects described heat exchanger exit temperature again
Degree；
Described recording unit is additionally operable to: after record ti again when δ t interval time, by the testing result note of described detector unit
Record as t (i+1)；
Comparing unit, is used for comparing the size of [t (i+1)-ti]/δ t and the first preset value a；
Described recording unit is additionally operable to: record cumulative number f, and when [t (i+1)-ti]/δ t is less than described first preset value a
When, described cumulative number f is added 1 and records, wherein, the initial value of described cumulative number f is 0；
Described comparing unit is additionally operable to: compares the size of described cumulative number f and preset times n；
Control unit, for when cumulative number f is more than or equal to preset times n, controlling described heat pump type air conditioner to start defrost.
8. defrosting control device according to claim 7 it is characterised in that
Described detector unit is additionally operable to: when described cumulative number f is less than described preset times n, rerun δ t interval time
Afterwards, detection ti and t (i+1) again.
Described recording unit is additionally operable to: records ti and t (i+1) again detecting.
9. defrosting control device according to claim 7 it is characterised in that
Described recording unit is additionally operable to: described air-conditioning is run after the first preset time t s with heating mode, persistently changes described in record
The detection number of times of hot device outlet temperature, and record result is designated as detecting number of times m；
Described comparing unit is additionally operable to: when [t (i+1)-ti]/δ t is more than or equal to described first preset value a, then comparison system
Run time ta and the size of the second preset time t m, wherein, described system operation time ta=ts+ δ t × m；
Described comparing unit is additionally operable to: when described system operation time ta is more than described second preset time t m, compares t (i+
1) size with first threshold；
Described control unit is additionally operable to: when t (i+1) is less than first threshold, controls described heat pump type air conditioner to start defrost.
10. defrosting control device according to claim 9 it is characterised in that
Described detector unit is additionally operable to: when described system operation time ta is less than or equal to described second preset time t m, then transports
After between-line spacing time δ t, detection ti and t (i+1) again；
Described recording unit is additionally operable to: records ti and t (i+1) again detecting.
11. defrosting control devices according to claim 10 it is characterised in that
Described detector unit is additionally operable to: when t (i+1) is more than or equal to first threshold, reruns after δ t interval time, again examines
Survey ti and t (i+1)；
Described recording unit is additionally operable to: records ti and t (i+1) again detecting.
12. defrosting control devices according to any one of claim 7 to 11 it is characterised in that
Described detector unit is additionally operable to: after defrost terminates, described heat pump type air conditioner runs first again with heating mode and presets
After time ts and when continuing to run with δ t interval time, detection ti and t (i+1) again；
Described recording unit is additionally operable to: at the end of defrost, will be all clear for the data of described cumulative number f and described detection number of times m
Zero, and record ti and t (i+1) again detecting.
A kind of 13. heat pump type air conditioners are it is characterised in that include:
Defrosting control device as any one of claim 7 to 12.
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| CN107388656A (en) * | 2017-06-13 | 2017-11-24 | 珠海格力电器股份有限公司 | The control method of unit, apparatus and system |
| CN108592296A (en) * | 2018-06-01 | 2018-09-28 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN108800451A (en) * | 2018-06-01 | 2018-11-13 | 青岛海尔空调器有限总公司 | air conditioner defrosting control method |
| CN108800435A (en) * | 2018-06-01 | 2018-11-13 | 青岛海尔空调器有限总公司 | air conditioner defrosting control method |
| CN109737560A (en) * | 2019-01-17 | 2019-05-10 | 奥克斯空调股份有限公司 | A kind of air-conditioning defrosting control method, device and air conditioner |
| CN110513949A (en) * | 2019-08-28 | 2019-11-29 | 长虹美菱股份有限公司 | A kind of defrosting control method and device |
| CN110631201A (en) * | 2018-06-25 | 2019-12-31 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN110940057A (en) * | 2019-12-12 | 2020-03-31 | 宁波奥克斯电气股份有限公司 | Control method for slowing down defrosting attenuation of air conditioner and air conditioner |
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| CN107388656A (en) * | 2017-06-13 | 2017-11-24 | 珠海格力电器股份有限公司 | The control method of unit, apparatus and system |
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| CN108800435A (en) * | 2018-06-01 | 2018-11-13 | 青岛海尔空调器有限总公司 | air conditioner defrosting control method |
| CN108800451B (en) * | 2018-06-01 | 2021-03-16 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
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| CN110631201B (en) * | 2018-06-25 | 2021-10-29 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN109737560A (en) * | 2019-01-17 | 2019-05-10 | 奥克斯空调股份有限公司 | A kind of air-conditioning defrosting control method, device and air conditioner |
| CN110513949A (en) * | 2019-08-28 | 2019-11-29 | 长虹美菱股份有限公司 | A kind of defrosting control method and device |
| CN110940057A (en) * | 2019-12-12 | 2020-03-31 | 宁波奥克斯电气股份有限公司 | Control method for slowing down defrosting attenuation of air conditioner and air conditioner |
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