CN106931694B - For the method, apparatus of defrost, heat pump and air-conditioning - Google Patents
For the method, apparatus of defrost, heat pump and air-conditioning Download PDFInfo
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- CN106931694B CN106931694B CN201710236191.5A CN201710236191A CN106931694B CN 106931694 B CN106931694 B CN 106931694B CN 201710236191 A CN201710236191 A CN 201710236191A CN 106931694 B CN106931694 B CN 106931694B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
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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
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
- F25B2347/023—Set point defrosting
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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
- F25B2600/00—Control issues
- F25B2600/01—Timing
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2103—Temperatures near a heat exchanger
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
The embodiment of the present invention provides a kind of method, apparatus and air-conditioning for defrost, belongs to field of air conditioning.The method judges whether previous defrost is clean；In the sordid situation of previous defrost, increase the time threshold that defrost is exited described in the temperature threshold for exiting defrost and/or increase；Outside system the outlet refrigerant temperature of machine heat exchanger not less than increase after the temperature threshold for exiting defrost in the case where or the used defrost time not less than increase after the time threshold for exiting defrost in the case where, control the system and exit defrost.In the sordid situation of previous defrost, the temperature threshold or time threshold for exiting defrost are dynamically set, so that defrost is more intelligent.
Description
Technical field
The present invention relates to field of air conditioning, more particularly to for the method, apparatus of defrost, heat pump and air-conditioning.
Background technique
Air-conditioning system and heat pump system are in the meeting frosting of low temperature environment long-play, if when the defrost of defrost exit criteria
Between and defrost to exit temperature setting improper, will lead to that defrost each time is not clean, and frost is got deeper on condenser, thus significantly
Machine capability is reduced, machine normal use is influenced.
In the prior art, when system reaches defrost condition and enters defrost, system defrost exit criteria is surveyed according to previous
Test result setting, temperature is exited in defrost of the temperature higher than setting during reaching fixed defrost time or defrost, then exits
Defrost.But existing control method not smart enoughization, in the sordid situation of defrost, the defrost time can not be according to practical feelings
Condition extends, and the defrost of setting is exited temperature and can not be improved according to the actual situation to extend the defrost time, thus will lead to cold
Frost is got deeper on condenser.
Summary of the invention
The purpose of the embodiment of the present invention is that a kind of method, apparatus and air-conditioning for defrost is provided, for solving or extremely
Small part solves above-mentioned technological deficiency.
To achieve the goals above, the embodiment of the present invention provides a kind of method for defrost, this method comprises: judgement is first
Whether preceding defrost is clean；In the sordid situation of previous defrost, increases and moved back described in the temperature threshold for exiting defrost and/or increase
The time threshold of defrost out；And the outlet refrigerant temperature of machine heat exchanger is not less than the temperature for exiting defrost after increasing outside system
In the case where spending threshold value or in the case where the used defrost time being not less than the time threshold for exiting defrost after increasing,
It controls the system and exits defrost.
Correspondingly, the embodiment of the present invention also provides a kind of device for defrost, and described device includes: the first judgement mould
Block, for judging whether previous defrost is clean；Threshold setting module, in the sordid situation of previous defrost, increase to be moved back
The time threshold of defrost is exited described in the temperature threshold of defrost and/or increase out；And defrosting control module is exited, for being
In the case that the outlet refrigerant temperature of the outer machine heat exchanger of system is not less than the temperature threshold for exiting defrost after increasing or made
In the case that the defrost time is not less than the time threshold for exiting defrost after increasing, controls the system and exit defrost.
Correspondingly, the embodiment of the present invention also provides a kind of air-conditioning, and the air-conditioning includes the above-mentioned device for defrost.
Correspondingly, the embodiment of the present invention also provides a kind of heat pump, and the air-conditioning includes the above-mentioned device for defrost.
Through the above technical solutions, by judging whether previous defrost is completely dynamically arranged the temperature for exiting defrost
Spend threshold value or time threshold, thus solves the problems, such as because set defrost exit criteria it is improper due to cause to defrost sordid, and solve
Certainly system defrost exit criteria fixes not intelligentized problem in the prior art.
The other feature and advantage of the embodiment of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to further understand for providing to the embodiment of the present invention, and constitute part of specification, under
The specific embodiment in face is used to explain the present invention embodiment together, but does not constitute the limitation to the embodiment of the present invention.Attached
In figure:
Fig. 1 shows the flow chart of the method according to an embodiment of the invention for defrost；And
Fig. 2 shows the block diagrams of the device according to an embodiment of the invention for defrost.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the embodiment of the present invention.It should be understood that this
Locate described specific embodiment and be merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
The embodiment of the present invention provides a kind of method for defrost, and this method may include: to judge whether previous defrost is done
Only；In the sordid situation of previous defrost, increase the time that defrost is exited described in the temperature threshold for exiting defrost and/or increase
Threshold value；Outside system the outlet refrigerant temperature of machine heat exchanger not less than increase after the temperature threshold for exiting defrost in the case where or
Person controls the system and exits in the case where the used defrost time being not less than the time threshold for exiting defrost after increasing
Defrost.The temperature threshold or time threshold for exiting defrost is dynamically arranged in the sordid situation of previous defrost in this method
Value, so that defrost is more intelligent.
Completely previous defrost is not changed in defrost after the completion of previous defrost does not refer to last time defrost completely in the embodiment of the present invention
Defrost is clean after the completion of completely referring to last time defrost.
Fig. 1 shows the flow chart of the method according to an embodiment of the invention for defrost.As shown in Figure 1, of the invention
One embodiment provides a kind of method for defrost, and this method may comprise steps of:
Step S10 starts to execute defrost.When air-conditioning system or heat pump system meet defrost condition, it will automatically begin to execute
Defrost.
It is default to first determine whether the frequency n for currently carrying out defrost is greater than when system starts to execute defrost by step S11
Number.The value of the preset times is preferably not less than 2.
Step S12, in the case where the current frequency n for carrying out defrost is not more than the preset times, will move out
The temperature threshold of frost is set as TN afterwards=T0And it will move out the time threshold of defrost and be set as tN afterwards=t0.In the embodiment of the present invention
In, TN afterwardsThe set temperature threshold for exiting defrost, T when to carry out n-th defrost0It, can for temperature threshold initially set
To be configured according to actual needs, tN afterwardsThe set time threshold for exiting defrost, t when to carry out n-th defrost0It is initial
The time threshold of setting can be configured according to actual needs.
Step S13 judges previousization in the case where the current frequency n for carrying out defrost is greater than the preset times
Whether frost is clean.
Step S14 sets T for the temperature threshold for exiting defrost in the case where previous defrost is cleanN afterwards=
T(n-1) afterwardsAnd t is set by the time threshold for exiting defrostN afterwards=t(n-1) afterwards, in an embodiment of the present invention, T(n-1) afterwardsFor
The set temperature threshold for exiting defrost, t when carrying out (n-1)th defrost(n-1) afterwardsIt is set when to carry out (n-1)th defrost
Exit the time threshold of defrost.That is, check defrost it is clean in the case where, by exiting set by this defrost
Ice-lolly part is set as identical as defrost condition is exited set by last time defrost.
Step S15 sets T for the temperature threshold for exiting defrost in the sordid situation of previous defrostN afterwards=
T(n-1) afterwards+ △ T and t is set by the time threshold for exiting defrostN afterwards=t(n-1) afterwards+ △ t, in an embodiment of the present invention,
△ T is set temperature increase, and △ t is set time value added.Optionally, set temperature increase △ T
Range can be 0.5 DEG C to 5 DEG C, and optionally, the range of set time value added △ t is 0.5 minute to 5 points
Clock.
Optionally, the temperature threshold that defrost is exited in increase in the embodiment of the present invention is also possible in temperature threshold initially set
Increase by a fixed value on the basis of value, or increases and exit the time threshold of defrost and be also possible in time threshold initially set
On the basis of increase by a fixed value.
Step S16, after executing the step any in S12, S14 or S15 with step, control system starts defrost.
Step S17 judges the outlet refrigerant temperature T of the outer machine heat exchanger of systemN outWhether set exit is greater than or equal to
The temperature threshold T of defrostN afterwardsOr whether used defrost time t is greater than or equal to the set time threshold for exiting defrost
Value tN afterwards。
Step S17, the outlet refrigerant temperature T of machine heat exchanger outside systemN outDefrost is exited more than or equal to set
Temperature threshold TN afterwardsIn the case where or used defrost time t be greater than or equal to the set time threshold for exiting defrost
Value tN afterwardsIn the case where, illustrate that exiting defrost condition is satisfied, then controls the system and exit defrost.
The outlet refrigerant temperature T of machine heat exchanger outside systemN outLess than the set temperature threshold T for exiting defrostN afterwardsFeelings
It is less than the set time threshold t for exiting defrost under condition and in used defrost time tN afterwardsIn the case where, explanation exits
Defrost condition is not satisfied, then continues to execute defrost.
In embodiments of the present invention, it is greater than preset times in the number for currently carrying out defrost and judges that previous defrost is not done
In the case where net, then compared with last time defrost, increase the temperature threshold for exiting defrost and the time threshold of defrost is exited in increase,
And then come defrost total time essentially by dynamically extension frostization is clean.
Further, judge whether previous defrost completely may include: in the system the n-th -2 times machines into outside when defrost
The refrigerant inlet temperature T of heat exchangerEnter (n-2)With the refrigerant inlet temperature of the (n-1)th time machine heat exchanger into outside when defrost of the system
Spend TEnter (n-1)Between difference A be less than predetermined value in the case where, judge that previous defrost is clean；And the system the n-th -2 times into
Enter the refrigerant inlet temperature T of outer machine heat exchanger when defrostEnter (n-2)With (n-1)th time machine heat exchanger into outside when defrost of the system
Refrigerant inlet temperature TEnter (n-1)Between difference not less than in the case where predetermined value A, judge that previous defrost is not clean, need at this time
Change the condition for exiting defrost.Here, n is positive integer, and the value of n is greater than 2.Preferably, the value range of predetermined value A is 1
DEG C to 10 DEG C.It is alternatively possible to detect the refrigerant inlet temperature of outer machine heat exchanger using temperature sensor when carrying out defrost every time
Degree.Whether the difference outside when by judging previously to enter twice defrost between the refrigerant inlet temperature of machine heat exchanger is greater than or equal to
Predetermined value can fast and effeciently judge whether previous defrost is clean.
Optionally, after system is powered every time, again from 1 start recording defrost number.
Further, in embodiments of the present invention, it is alternatively possible to using temperature sensor come to machine heat exchanger outside system
Outlet refrigerant temperature and inlet temperature measure.
It will be below 2 provided in an embodiment of the present invention to be used for defrost to be further illustrated with set preset times
Method.
First time defrost is carried out after system energization: when entering defrost, detecting the refrigerant inlet temperature of outer machine heat exchanger
TEnter 1, and will move out defrost condition setting are as follows: the outlet refrigerant temperature T of the outer machine heat exchanger of system detectedOut 1≥TAfterwards 1Or institute
The defrost time t >=t usedAfterwards 1When control system release defrost, here, TAfterwards 1=T0, tAfterwards 1=t0.In embodiments of the present invention,
TAfterwards 1The set temperature threshold for exiting defrost, t when to carry out the 1st defrostAfterwards 1It is set when to carry out the 1st defrost
The time threshold for exiting defrost, T0For temperature threshold initially set, t0For time threshold initially set.
Second of defrost: when entering defrost, the refrigerant inlet temperature T of outer machine heat exchanger is detectedEnter 2, and will move out defrost item
Part setting are as follows: the outlet refrigerant temperature T of the outer machine heat exchanger of system detectedOut 2≥TAfterwards 2Or used defrost time t >=
tAfterwards 2When control system release defrost, here, TAfterwards 2=T0, tAfterwards 2=t0.In embodiments of the present invention, TAfterwards 2To carry out the 2nd change
The set temperature threshold for exiting defrost, t when whiteAfterwards 2The set time threshold for exiting defrost when to carry out the 2nd defrost
Value, T0For temperature threshold initially set, t0For time threshold initially set.
Third time defrost: judge whether previous defrost is clean since third time defrost.If T detectedEnter 1-TEnter 2≥
A illustrates previously to defrost unclean, needs to change and exits defrost condition, and otherwise previously defrosting is clean for explanation, and A can basis here
Actual conditions and set, it is preferable that the value range of A is 1 DEG C to 10 DEG C.
Into when defrost, the refrigerant inlet temperature T of outer machine heat exchanger is detectedEnter 3If previously defrosting is not clean, will move back
Defrost condition setting out are as follows: the outlet refrigerant temperature T of the outer machine heat exchanger of system detectedOut 3≥TAfterwards 3Or used defrost
Time t >=tAfterwards 3, it is provided with TAfterwards 3=TAfterwards 2+ △ T, and setting tAfterwards 3=t2+ afterwards△ t, it is preferable that the value range of △ T can be
0.5 DEG C to 5 DEG C, the value range of △ t can be 0.5 minute to 5 minutes.If previously defrosting is not clean, defrost will move out
Condition setting are as follows: the outlet refrigerant temperature T of the outer machine heat exchanger of system detectedOut 3≥TAfterwards 3Or used defrost time t >=
tAfterwards 3, it is provided with TAfterwards 3=TAfterwards 2, and setting tAfterwards 3=tAfterwards 2, in embodiments of the present invention, TAfterwards 3To carry out the 3rd defrost when institute
What is be arranged exits the temperature threshold of defrost, tAfterwards 3The set time threshold for exiting defrost, △ T when to carry out the 3rd defrost
For set temperature increase, △ t is set time value added.
And so on, when executing N+2 defrost, if TEnter N-TEnter (N+1)The N+2 times defrost is then exited defrost by >=A
Condition setting are as follows: the outlet refrigerant temperature T of the outer machine heat exchanger of system detected(N+2) out≥T(N+2) afterwardsOr used defrost
Time t >=t(N+2) afterwards, it is provided with T(N+2) afterwards=T(N+1) afterwards+ △ T and setting t(N+2) afterwards=tAfterwards (N+1)+△t；Otherwise, exit criteria
Are as follows: the outlet refrigerant temperature T of the outer machine heat exchanger of system detected(N+2) out≥T(N+2) afterwardsOr used defrost time t >=
t(N+2) afterwards, it is provided with T(N+2) afterwards=T(N+1) afterwardsAnd setting t(N+2) afterwards=t(N+1) afterwards.Wherein, N is positive integer, and the value of N be greater than or
Equal to 1, TEnter NThe refrigerant inlet temperature of machine heat exchanger, T outside when to execute n-th defrostEnter (N+1)Outside when to execute the N+1 times defrost
The refrigerant inlet temperature of machine heat exchanger, T(N+2) afterwardsThe set temperature threshold for exiting defrost when to carry out the N+2 times defrost,
T(N+1) afterwardsThe set temperature threshold for exiting defrost, t when to carry out the N+1 times defrost(N+2) afterwardsTo carry out this N+2 times change
The set time threshold for exiting defrost, t when white(N+1) afterwardsWhen to carry out the N+1 times defrost it is set exit defrost when
Between threshold value.
In embodiments of the present invention, if determined previously according to the refrigerant inlet temperature of machine heat exchanger outside when previous defrost
Defrost is not clean, then exits the condition setting of defrost are as follows: the set temperature threshold for exiting defrost is than set by last defrost
The temperature threshold set increases △ T and the set time threshold for exiting defrost is than last increase △ t, to pass through extension
Come defrost total time frostization completely, to make defrost more intelligent compared with prior art.
Fig. 2 shows the block diagrams of the device 20 according to an embodiment of the invention for defrost.As shown in Fig. 2, of the invention
Embodiment also provides a kind of device 20 for defrost, the apparatus may include: first judgment module 21 is previously changed for judging
Whether frost is clean；Threshold setting module 22, for increasing the temperature threshold for exiting defrost in the sordid situation of previous defrost
And/or the time threshold of defrost is exited described in increasing；Defrosting control module 23 is exited, the refrigerant for the machine heat exchanger outside system
It is not less than in the case that outlet temperature is not less than the temperature threshold for exiting defrost after increasing or in the used defrost time
In the case where the time threshold for exiting defrost after increase, controls the system and exit defrost.
Optionally, device 20 can also include the second judgment module, for judging whether the frequency n for currently carrying out defrost is big
In preset times, it is alternatively possible to which the number of defrost is calculated since 1 again after system is powered every time；The threshold value setting
Module 22 is also used to will move out the temperature of defrost in the case where currently carrying out the frequency n of defrost no more than the preset times
Threshold value is set as TN afterwards=T0And it will move out the time threshold of defrost and be set as tN afterwards=t0；The first judgment module 21 is used for
In the case where the current frequency n for carrying out defrost is greater than the preset times, judge whether previous defrost is clean, the threshold
Value setup module 22 is also used to: in the case where previous defrost is clean, setting T for the temperature threshold for exiting defrostN afterwards=
T(n-1) afterwardsAnd t is set by the time threshold for exiting defrostN afterwards=t(n-1) afterwards；It, will in the sordid situation of previous defrost
The temperature threshold for exiting defrost is set as TN afterwards=T(n-1) afterwardsIt+△ T and sets the time threshold for exiting defrost to
tN afterwards=t(n-1) afterwards+△t；Defrosting control module 23 is exited for the outlet refrigerant temperature of the machine heat exchanger outside system not less than set
Defrost is exited not less than set in the case where the temperature threshold for exiting defrost set or in the used defrost time
In the case where time threshold, controls the system and exit defrost, wherein TN afterwardsSet exiting when to carry out n-th defrost
The temperature threshold of frost, T(n-1) afterwardsThe set temperature threshold for exiting defrost, T when to carry out (n-1)th defrost0Initially to set
Temperature threshold, △ T be set temperature increase, tN afterwardsThe set time for exiting defrost when to carry out n-th defrost
Threshold value, t(n-1) afterwardsThe set time threshold for exiting defrost, t when to carry out (n-1)th defrost0For time threshold initially set
Value, △ t are set time value added.Preferably, the value of the preset times is not less than 2, and the set temperature increases
The range of value added △ T can be 0.5 DEG C to 5 DEG C；And the range of the set time value added △ t can be 0.5 point
Clock was to 5 minutes.Be greater than preset times in the number for currently carrying out defrost and under judging the sordid situation of previous defrost, then with
Last time defrost is compared, and increases the temperature threshold for exiting defrost and the time threshold of defrost is exited in increase, and then essentially by
Dynamically extend to come defrost total time frostization completely.
The concrete operating principle and benefit and aforementioned present invention of device provided in an embodiment of the present invention for defrost are implemented
The concrete operating principle and benefit for the method for defrost that example provides are similar, will not be described in great detail here.
Correspondingly, the embodiment of the present invention also provides a kind of air-conditioning, which may include the above-mentioned device for defrost.
Further, correspondingly, the embodiment of the present invention also provides a kind of heat pump, which may include above-mentioned for changing
The device of frost.
The alternative embodiment of example of the present invention is described in detail in conjunction with attached drawing above, still, the embodiment of the present invention is not limited to
Detail in above-described embodiment can be to the skill of the embodiment of the present invention in the range of the technology design of the embodiment of the present invention
Art scheme carries out a variety of simple variants, these simple variants belong to the protection scope of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the embodiment of the present invention pair
No further explanation will be given for various combinations of possible ways.
It will be appreciated by those skilled in the art that implementing the method for the above embodiments is that can pass through
Program is completed to instruct relevant hardware, which is stored in a storage medium, including some instructions are used so that one
The whole of a (can be single-chip microcontroller, chip etc.) or processor (processor) execution each embodiment the method for the application
Or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
In addition, any combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not disobeyed
The thought for carrying on the back the embodiment of the present invention, equally should be considered as disclosure of that of the embodiment of the present invention.
Claims (16)
1. a kind of method for defrost, which is characterized in that this method comprises:
Judge whether previous defrost is clean；
In the sordid situation of previous defrost, increase exit defrost temperature threshold and/or increase described in exit defrost when
Between threshold value；And
Outside system the outlet refrigerant temperature of machine heat exchanger not less than increase after the temperature threshold for exiting defrost in the case where or
Person controls the system and exits in the case where the used defrost time being not less than the time threshold for exiting defrost after increasing
Defrost.
2. the method according to claim 1, wherein the method also includes:
Whether the current frequency n for carrying out defrost of judgement is greater than preset times；
In the case where the current frequency n for carrying out defrost is not more than the preset times, by the exiting of the n-th defrost
The temperature threshold T of frostN afterwardsIt is set as TN afterwards=T0And/or by the time threshold t for exiting defrost of the n-th defrostN afterwardsIt is set as tN afterwards
=t0；
In the case where the current frequency n for carrying out defrost is greater than the preset times, executing the previous defrost of judgement is
No clean step,
Wherein, T0For temperature threshold initially set, t0For time threshold initially set.
3. according to the method described in claim 2, it is characterized in that, the method also includes:
In the case where previous defrost is clean, by the temperature threshold T for exiting defrost of the n-th defrostN afterwardsIt is set as TN afterwards=
T(n-1) afterwardsAnd/or by the time threshold t for exiting defrost of the n-th defrostN afterwardsIt is set as tN afterwards=t(n-1) afterwards；
In the sordid situation of previous defrost, by the temperature threshold T for exiting defrost of the n-th defrostN afterwardsIt is set as TN afterwards=
T(n-1) afterwards+ △ T and/or t is set by the time threshold for exiting defrost of the n-th defrostN afterwards=t(n-1) afterwards+△t；
Wherein, T(n-1) afterwardsThe set temperature threshold for exiting defrost, t when to carry out (n-1)th defrost(n-1) afterwardsTo carry out (n-1)th
The set time threshold for exiting defrost when secondary defrost, △ T are set temperature increase, and △ t is the set time
Value added；
Wherein, the value of the preset times is not less than 2.
4. according to the method described in claim 3, it is characterized in that, it is described judge previous defrost whether completely include:
The refrigerant inlet temperature of machine heat exchanger and the system (n-1)th time entrance outside when entering defrost the system the n-th -2 times
In the case that difference when defrost between the refrigerant inlet temperature of outer machine heat exchanger is less than predetermined value, judge that previous defrost is clean；
And
The refrigerant inlet temperature of machine heat exchanger and the system (n-1)th time entrance outside when entering defrost the system the n-th -2 times
Difference when defrost between the refrigerant inlet temperature of outer machine heat exchanger judges that previous defrost is not done not less than in the case where predetermined value
Only.
5. according to the method described in claim 4, it is characterized in that, the range of the predetermined value is 1 DEG C to 10 DEG C.
6. according to the method described in claim 3, it is characterized in that,
The range of the set temperature increase △ T is 0.5 DEG C to 5 DEG C；And
The range of the set time value added △ t is 0.5 minute to 5 minutes.
7. according to method described in any one of claim 2 to 6 claim, which is characterized in that the method also includes:
When the system is powered every time, start the frequency n for recording defrost again.
8. a kind of device for defrost, which is characterized in that described device includes:
First judgment module, for judging whether previous defrost is clean；
Threshold setting module, for increasing temperature threshold and/or the increase for exiting defrost in the sordid situation of previous defrost
The time threshold for exiting defrost；And
Defrosting control module is exited, the outlet refrigerant temperature for the machine heat exchanger outside system exits defrost not less than after increasing
Temperature threshold in the case where or the used defrost time not less than increase after the time threshold for exiting defrost feelings
Under condition, controls the system and exit defrost.
9. device according to claim 8, which is characterized in that described device further include:
Second judgment module, for judging whether the frequency n for currently carrying out defrost is greater than preset times；
The threshold setting module is also used to the case where the current frequency n for carrying out defrost is no more than the preset times
Under, by the temperature threshold T for exiting defrost of the n-th defrostN afterwardsIt is set as TN afterwards=T0And/or by the exiting of the n-th defrost
The time threshold t of frostN afterwardsIt is set as tN afterwards=t0；
The first judgment module is also used in the case where the current frequency n for carrying out defrost is greater than the preset times,
Judge whether previous defrost is clean,
Wherein, T0For temperature threshold initially set, t0For time threshold initially set.
10. device according to claim 9, which is characterized in that the threshold setting module is also used to:
In the case where previous defrost is clean, by the temperature threshold T for exiting defrost of the n-th defrostN afterwardsIt is set as TN afterwards=
T(n-1) afterwardsAnd/or by the time threshold t for exiting defrost of the n-th defrostN afterwardsIt is set as tN afterwards=t(n-1) afterwards；
In the sordid situation of previous defrost, by the temperature threshold T for exiting defrost of the n-th defrostN afterwardsIt is set as TN afterwards=
T(n-1) afterwards+ △ T and/or t is set by the time threshold for exiting defrost of the n-th defrostN afterwards=t(n-1) afterwards+△t；
Wherein, T(n-1) afterwardsThe set temperature threshold for exiting defrost, t when to carry out (n-1)th defrost(n-1) afterwardsTo carry out (n-1)th
The set time threshold for exiting defrost when secondary defrost, △ T are set temperature increase, and △ t is the set time
Value added；
Wherein, the value of the preset times is not less than 2.
11. device according to claim 10, which is characterized in that the first judgment module is used for:
The refrigerant inlet temperature of machine heat exchanger and the system (n-1)th time entrance outside when entering defrost the system the n-th -2 times
In the case that difference when defrost between the refrigerant inlet temperature of outer machine heat exchanger is less than predetermined value, judge that previous defrost is clean；
And
The refrigerant inlet temperature of machine heat exchanger and the system (n-1)th time entrance outside when entering defrost the system the n-th -2 times
Difference when defrost between the refrigerant inlet temperature of outer machine heat exchanger judges that previous defrost is not done not less than in the case where predetermined value
Only.
12. device according to claim 11, which is characterized in that the range of the predetermined value is 1 DEG C to 10 DEG C.
13. device according to claim 10, which is characterized in that
The range of the set temperature increase △ T is 0.5 DEG C to 5 DEG C；And
The range of the set time value added △ t is 0.5 minute to 5 minutes.
14. according to device described in any one of claim 9 to 13 claim, which is characterized in that described device is also wrapped
It includes:
Defrost number logging modle, the frequency n for when the system is powered every time, starting to record defrost again.
15. a kind of air-conditioning, which is characterized in that the air-conditioning includes according to any one of claim 8 to 14 claim institute
The device for defrost stated.
16. a kind of heat pump, which is characterized in that the heat pump includes according to any one of claim 8 to 14 claim institute
The device for defrost stated.
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| CN107917504B (en) * | 2017-10-11 | 2019-10-01 | 青岛海尔空调器有限总公司 | Air-conditioning and its defrosting control method |
| CN107655150A (en) * | 2017-10-16 | 2018-02-02 | 广东美的暖通设备有限公司 | Air-conditioner defrosting control device and method |
| CN107842970B (en) | 2017-10-18 | 2019-10-01 | 广东美的暖通设备有限公司 | Air-conditioning system and its defrosting control method and device |
| 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 |
| CN110631186B (en) * | 2018-06-25 | 2021-07-23 | 重庆海尔空调器有限公司 | Defrosting control method and device for air conditioner |
| CN110631188B (en) * | 2018-06-25 | 2021-07-30 | 重庆海尔空调器有限公司 | Defrosting control method and device for air conditioner |
| CN111189171B (en) * | 2018-11-14 | 2022-04-19 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189182B (en) * | 2018-11-14 | 2022-04-19 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189172B (en) * | 2018-11-14 | 2021-10-29 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN110230844A (en) * | 2019-06-05 | 2019-09-13 | 青岛海尔空调器有限总公司 | Air conditioner and defrosting control method for air conditioner |
| CN110332652B (en) * | 2019-07-25 | 2021-04-09 | 宁波奥克斯电气股份有限公司 | Defrosting control method and device and air conditioner |
| CN110470017A (en) * | 2019-08-03 | 2019-11-19 | 青岛海尔空调器有限总公司 | Control method and device, air-conditioning for air-conditioner defrosting |
| CN111649523B (en) * | 2020-06-09 | 2022-03-15 | 合肥美菱物联科技有限公司 | Defrosting control method and system based on air-cooled refrigerator |
| CN113899146B (en) * | 2020-07-06 | 2023-10-10 | 青岛海尔特种电冰柜有限公司 | Control method for ice blockage of refrigerator fan, refrigerator and computer storage medium |
| CN112032929B (en) * | 2020-08-31 | 2021-04-30 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and device |
| CN113915921B (en) * | 2021-01-22 | 2023-02-17 | 海信冰箱有限公司 | Defrosting control method and refrigerator |
| CN114646131B (en) * | 2022-03-21 | 2023-10-27 | 广东开利暖通空调股份有限公司 | Defrosting method of air conditioner |
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