CN107062793B - Refrigerate nature return air defrosting control method and control system - Google Patents
Refrigerate nature return air defrosting control method and control system Download PDFInfo
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- CN107062793B CN107062793B CN201710189351.5A CN201710189351A CN107062793B CN 107062793 B CN107062793 B CN 107062793B CN 201710189351 A CN201710189351 A CN 201710189351A CN 107062793 B CN107062793 B CN 107062793B
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/003—Arrangement or mounting of control or safety devices for movable 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
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- Mechanical Engineering (AREA)
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- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
The present invention relates to defrost process fields, more particularly to refrigeration nature return air defrosting control method and refrigeration nature return air defrosting control system.The control method includes: starting return air defrost；Stop the signal of refrigeration according to refrigerating chamber, obtains real time environment temperature；Determine that return air defrost is most grown and return air defrost longest duration in short-term according to real time environment temperature；According to return air defrost duration, return air defrost, most long in short-term, return air defrost longest duration and refrigeration defrosting sensor temperature generate refrigeration fan parking signal；The refrigeration fan parking time is determined according to real time environment temperature；The duration of the fan parking of record refrigeration in real time exits return air defrost, into refrigeration chamber after the duration for refrigerating fan parking is greater than or equal to.The present invention limits the return air defrost time, it is ensured that evaporator surface frost layer is melted completely, avoids causing refrigeration not freezed for a long time because turn-on temperature is not achieved in refrigeration defrosting sensor temperature for a long time.
Description
Technical field
The present invention relates to defrost process fields, return more particularly to refrigeration nature return air defrosting control method and refrigeration nature
Wind defrosting control system.
Background technique
Existing dual system wind cooling refrigerator refrigerating chamber generally uses nature return air defrost, i.e., after refrigeration, electricity
Magnet valve switching but refrigeration blower continue to remain operational, using refrigeration return air entrained by heat, the frost layer on heating evaporation device surface,
Achieve the purpose that defrost, a temperature sensor generally is installed in refrigerator evaporator outlet, to control refrigerating chamber defrost
Process, only after its temperature reaches the temperature of setting, i.e., refrigerator can just give refrigerating chamber cooling supply again.Existing return air defrost
It is mainly controlled by defrosting sensor temperature, is drifted about when between the temperature and actual temperature of sensor perception, meeting
Defrosting control precision is seriously affected, refrigeration evaporator surface frost layer occurs and does not melt completely, defrost process just stops or evaporates
Device surface frost layer is thoroughly melted, but sensor temperature is still lower than set temperature, and refrigeration is not freezed for a long time, compartment temperature
Higher phenomenon.After refrigerating defrost in existing control, as long as reaching refrigeration starting point, refrigeration begins to freeze, but this
When evaporator surface there may be a large amount of water droplet, this is primarily due to, and refrigeration evaporator fin is small, and defrosting shipwreck is to converge
And then drip, in addition return air flows up through evaporator from base of evaporator, increases defrosting water and drain difficulty, lead to evaporator surface
Form stupid ice.
Summary of the invention
(1) technical problems to be solved
The object of the present invention is to provide large screen door of refrigerator body air channel structure and large screen refrigerators, to solve the drop of CPU
Warm problem.
(2) technical solution
In order to solve the above technical problem, the present invention provides a kind of refrigeration nature return air defrosting control methods comprising:
Stop the signal enabling return air defrost of refrigeration according to refrigerating chamber；
Stop the signal of refrigeration according to the refrigerating chamber, obtains real time environment temperature MRing；
According to the real time environment temperature MRingDetermine return air defrost most in short-term long TminWith return air defrost longest duration Tmax；
According to return air defrost duration T, the return air defrost most in short-term long Tmin, the return air defrost longest duration TmaxAnd it is cold
Hide defrosting sensor temperature MIt passesGenerate refrigeration fan parking signal；
According to the real time environment temperature MRingDetermine refrigeration fan parking time TStop；
The duration of the fan parking of record refrigeration in real time, when the duration of the refrigeration fan parking is greater than or equal to TStopAfterwards, it moves back
Return air defrost out, into refrigeration chamber.
In some embodiments, preferably, described according to the real time environment temperature MRingDetermine that return air defrost is most grown in short-term
TminWith return air defrost longest duration TmaxInclude:
Determine the real time environment temperature MRingLocating temperature stage, all temperature stages are combined into complete environment temperature
Variation range section；
According to preset temperature stage-defrost duration corresponding relationship, the return air defrost most in short-term long T is determinedmin, described time
Weathering frost longest duration Tmax。
In some embodiments, preferably, the return air defrost most in short-term long Tmin, the return air defrost longest duration Tmax
With the real time environment temperature MRingIncrease and reduce.
In some embodiments, preferably, the real time environment temperature M in the same temperature stageRingCorrespondence is identical
Return air defrost most in short-term long TminWith identical return air defrost longest duration Tmax。
In some embodiments, preferably, according to the real time environment temperature MRingDetermine refrigeration fan parking time TStopPacket
It includes:
Determine the real time environment temperature MRingLocating temperature stage, all temperature stages are combined into complete environment temperature
Variation range section；
According to preset temperature stage-shutdown duration corresponding relationship, the refrigeration fan parking time T is determinedStop。
In some embodiments, preferably, the refrigeration fan parking time TStopWith the real time environment temperature MRingIncreasing
It is high and increase；The real time environment temperature M in the same temperature stageRingCorresponding constant refrigeration fan parking time TStop。
In some embodiments, preferably, described according to return air defrost duration T, the return air defrost most in short-term long Tmin、
The return air defrost longest duration TmaxAnd refrigeration defrosting sensor temperature MIt passesGenerate refrigeration fan parking signal, comprising:
By return air defrost duration T and the return air defrost most in short-term long TminIt is compared；
When meeting TminAfter≤T, by evaporator set temperature MIt steamsWith sensor MIt passesIt is compared；
When meeting MIt steams≤MIt passesWhen, refrigerating chamber fan parking.
In some embodiments, preferably, in some embodiments, preferably, described by evaporator set temperature MIt steams
With sensor MIt passesAfter being compared,
When meeting MIt steams>MIt passesWhen, by return air defrost duration T and the return air defrost longest duration TmaxIt is compared；
When meeting TmaxWhen > T, return described by evaporator set temperature MIt steamsWith sensor MIt passesIt is compared；
When meeting TmaxWhen≤T, refrigerating chamber fan parking.
The present invention also provides a kind of refrigeration nature return air defrosts for executing the refrigeration nature return air defrosting control method
Control system comprising:
Return air defrost start and stop module, for stopping the signal enabling return air defrost of refrigeration according to refrigerating chamber；According to return air
Frost exits signal, closes return air defrost；
Real time environment temperature-measuring module obtains real time environment temperature for stopping the signal of refrigeration according to the refrigerating chamber
Spend MRing；
Control module is judged, for according to the real time environment temperature MRingDetermine return air defrost most in short-term long TminAnd return air
Defrost longest duration Tmax；According to return air defrost duration T, the return air defrost most in short-term long Tmin, the return air defrost longest when
Long TmaxAnd refrigeration defrosting sensor temperature MIt passesDetermine refrigeration fan parking；According to the real time environment temperature MRingDetermine refrigeration wind
Machine downtime TStop；When the duration of the refrigeration fan parking is greater than or equal to TStopAfterwards, return air defrost is exited, into refrigerating chamber system
It is cold；
It refrigerates fan parking module and shuts down the refrigeration blower for refrigerating fan parking signal.
In some embodiments, preferably, judge that control module comprises determining that unit, the first judging unit and second are sentenced
Disconnected unit；
Determination unit, for according to the real time environment temperature MRingDetermine return air defrost most in short-term long TminWith return air defrost
Longest duration Tmax；According to the real time environment temperature MRingDetermine refrigeration fan parking time TStop；
First judging unit, for according to return air defrost duration T, the return air defrost most in short-term long Tmin, the return air
White longest duration TmaxAnd refrigeration defrosting sensor temperature MIt passesIt determines refrigeration fan parking, generates refrigeration fan parking signal；
Second judgment unit, duration and T for the refrigeration fan parkingStop, when the refrigeration fan parking
Duration is greater than or equal to TStopAfterwards, it generates return air defrost and exits signal.
(3) beneficial effect
Technology provided by the invention determines that return air defrost is most long in short-term and longest duration according to environment temperature, to limit back
The time of weathering frost, to ensure that evaporator surface frost layer is melted completely；Then in conjunction with the temperature change of refrigeration defrosting sensor, really
It is fixed whether to refrigerate fan parking, to avoid draw refrigeration defrosting sensor temperature be not achieved for a long time refrigerated caused by turn-on temperature when
Between do not freeze, influence store food quality.
On the other hand, the downtime of refrigeration blower is determined by environment temperature, to control the shutdown duration of refrigeration blower,
The frosting again in the case where not draining completely with the water after the defrost of refrigeration evaporator surface is avoided, avoids playing ice problem, mention
The reliability of height refrigeration return air defrost.
Detailed description of the invention
Fig. 1 is the step schematic diagram that nature return air defrosting control method is refrigerated in one embodiment of the invention；
Fig. 2 is the structural schematic diagram that nature return air defrosting control system is refrigerated in one embodiment of the invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Following instance
For illustrating the present invention, but it is not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.
In order to solve the problems, such as that defrosting effect is poor in the prior art.The present invention provides a kind of refrigeration nature return air defrosting control
Method and refrigeration nature return air defrosting control system.
Next, this technology will be described in detail by basic engineering, extension design and alternative design:
A kind of refrigeration nature return air defrosting control method, as shown in Figure 1, comprising:
Step 110, the signal that refrigerating chamber stops refrigeration being obtained；
The signal can be generated and be transmitted by refrigerator inside controller, can also be controlled with defrosting control system from refrigerator inside
Device obtains.Or in other examples, defrosting control system is integrated in refrigerator inside controller, is obtained by signal transmission
Refrigerating chamber is taken to stop the signal of refrigeration.
Step 112, stop the signal enabling return air defrost of refrigeration according to refrigerating chamber；
Stop it should be noted that the step can also generate refrigerating chamber by internal comprehensively control by control system simultaneously
The generation of cooling signals and return air defrost enabling signal, the two has association, and still, the sequence that signal generates can be adjusted
It is whole, for example signal is generated simultaneously, for another example successively generate signal.
Step 114, stop the signal of refrigeration according to refrigerating chamber, obtain real time environment temperature MRing；
Usually little in the variation of surroundings temperature, therefore, in some embodiments, real time environment temperature herein can
To be interpreted as environment temperature.But more accurate control in order to obtain, it is proposed that real-time monitoring environment temperature carries out correspondence
Subsequent judgement.
Step 116, according to real time environment temperature MRingDetermine return air defrost most in short-term long TminWith return air defrost longest duration
Tmax；
Determine that return air defrost is most long in short-term with after longest duration, the time of return air defrost becomes controllable factor.
The step can be specifically unfolded are as follows:
Step 116-1 determines real time environment temperature MRingLocating temperature stage, all temperature stages are combined into complete environment temperature
Spend variation range section；
Step 116-2 determines return air defrost most in short-term long T according to preset temperature stage-defrost duration corresponding relationshipmin、
Return air defrost longest duration Tmax。
Because frosting and environment temperature relationship are larger, environment more colder easier frosting, ambient heat frosting situation is weaker.It is based on
The factor, return air defrost most in short-term long Tmin, return air defrost longest duration TmaxThe rule followed are as follows: with real time environment temperature MRing
Increase and reduce.
On the other hand, in some embodiments, most long in short-term and longest duration is determined for convenience, it can will in technical operation
The variation range of environment temperature is divided into several stages, each stage corresponding one constant most long in short-term and longest duration.Locate
In the real time environment temperature M in same temperature stageRingCorresponding identical return air defrost most in short-term long TminMost with identical return air defrost
Long duration Tmax.Division in relation to each stage needs inventor is practical to investigate different regions, Various Seasonal, different living habits etc.
Exploratory division is carried out, this division is to need gradually to explore.
Preset temperature stage-defrost duration corresponding relationship is exemplified below:
| Environment temperature | MRing≤10 | 10<MRing≤18 | 18<MRing≤28 | 28<MRing≤35 | 35<MRing≤40 | 40<MRing |
| Most in short-term long Tmin | δ1 | δ2 | δ3 | δ4 | δ5 | δ6 |
| Maximum duration Tmax | γ1 | γ2 | γ3 | γ4 | γ5 | γ6 |
Wherein 6≤δ of 30min≤δ, 5≤δ, 4≤δ, 3≤δ, 2≤δ 1≤50min, 90min≤γ 6≤γ, 5≤γ, 4≤γ 3≤
γ2≤γ1≤120min
Step 118, according to return air defrost duration T, return air defrost most in short-term long Tmin, return air defrost longest duration TmaxAnd it is cold
Hide defrosting sensor temperature MIt passesGenerate refrigeration fan parking signal；
By the step refrigeration blower can be closed in time while reaching defrost.The step is specifically unfolded are as follows:
Step 118-1, by return air defrost duration T and return air defrost most in short-term long TminIt is compared；
Step 118-2, when meeting TminAfter≤T, by evaporator set temperature MIt steamsWith sensor MIt passesIt is compared；
When condition is not satisfied, then continue return air defrost.
Step 118-3, when meeting MIt steams≤MIt passesWhen, refrigerating chamber fan parking.
When condition is not satisfied, i.e. MIt steams>MIt passesWhen, then enter following steps:
Step 118-4: by return air defrost duration T and return air defrost longest duration TmaxIt is compared；
When meeting TmaxWhen > T, return evaporator set temperature MIt steamsWith sensor MIt passesIt is compared；
When meeting TmaxWhen≤T, refrigerating chamber fan parking.
That is, one kind is judged by step 118-3 there are two types of the modes of refrigerating chamber fan parking；Another kind passes through
Step 118-4 judgement.
Step 120, according to real time environment temperature MRingDetermine refrigeration fan parking time TStop；
Determine that the refrigeration fan parking time can shut down for a long time to avoid refrigeration blower, refrigerating chamber is not cold to be shown.
The step is deployable are as follows:
Step 120-1 determines real time environment temperature MRingLocating temperature stage, all temperature stages are combined into complete environment temperature
Spend variation range section；
Step 120-2 determines refrigeration fan parking time T according to preset temperature stage-shutdown duration corresponding relationshipStop。
Because the water after defrost is related with frosting degree, frosting degree is related with environment temperature, environment more cold junction frost more
Seriously, water is bigger after defrost, and more times is needed to distribute, moisture is discharged.Therefore, the rule that the refrigeration fan parking time follows
Rule are as follows: refrigeration fan parking time TStopWith real time environment temperature MRingIncrease and increase.
On the other hand, in some embodiments, the refrigeration fan parking time is determined for convenience, it can be by ring in technical operation
The variation range of border temperature is divided into several stages, a corresponding constant refrigeration fan parking time in each stage.I.e. in same
The real time environment temperature M of one temperature stageRingCorresponding constant refrigeration fan parking time TStop.Division in relation to each stage, needs
Inventor is practical to be investigated different regions, Various Seasonal, different living habits etc. and carries out exploratory division, this division be need by
Step is explored.
Preset temperature stage-shutdown duration corresponding relationship corresponding relationship is exemplified below:
| Environment temperature | MRing≤10 | 10<MRing≤18 | 18<MRing≤28 | 28<MRing≤35 | 35<MRing≤40 | 40<MRing |
| Downtime T1 | α1 | α2 | α3 | α4 | α5 | α6 |
Wherein, 1≤α of 7min≤α, 2≤α, 3≤α, 4≤α, 5≤α, 6≤15min.
Step 122, the duration T of the fan parking of record refrigeration in real time；
By recording refrigeration fan parking in real time, after reaching the downtime of setting, moisture is sufficiently discharged, and is not in
Play ice.
Step 124, the duration of the fan parking of record refrigeration in real time, when the duration of refrigeration fan parking is greater than or equal to TStop
Afterwards, return air defrost is exited, into refrigeration chamber.
Next a kind of refrigeration nature return air defrosting control for executing refrigeration nature return air defrosting control method is provided
System, as shown in Fig. 2, comprising:
Return air defrost start and stop module, for stopping the signal enabling return air defrost of refrigeration according to refrigerating chamber；According to return air
Frost exits signal, closes return air defrost；
Real time environment temperature-measuring module obtains real time environment temperature M for stopping the signal of refrigeration according to refrigerating chamberRing；
Control module is judged, for according to real time environment temperature MRingDetermine return air defrost most in short-term long TminWith return air defrost
Longest duration Tmax；According to return air defrost duration T, return air defrost most in short-term long Tmin, return air defrost longest duration TmaxAnd refrigerationization
White sensor temperature MIt passesDetermine refrigeration fan parking；According to real time environment temperature MRingDetermine refrigeration fan parking time TStop；When cold
The duration for hiding fan parking is greater than or equal to TStopAfterwards, return air defrost is exited, into refrigeration chamber；
It refrigerates fan parking module and shuts down refrigeration blower for refrigerating fan parking signal.
It should be noted that module provided above is divided with the function of completion, when actual product designs
It waits, the same module can belong to different elements or multiple modules are combined into the same element, this theoretical division and reality
The difference of border product is not enough to the difference for judging product and module protection.
In addition, the inside mention acquisition, to obtain, compare, judging etc. be all module or the function that element executes, as long as producing
Product, element, module reach the function and all belong to protection scope.
Such as: judge that control module can decompose are as follows: determination unit, the first judging unit and second judgment unit；
Determination unit, for according to real time environment temperature MRingDetermine return air defrost most in short-term long TminWith return air defrost longest
Duration Tmax；According to real time environment temperature MRingDetermine refrigeration fan parking time TStop；
First judging unit, for according to return air defrost duration T, return air defrost most in short-term long Tmin, return air defrost longest when
Long TmaxAnd refrigeration defrosting sensor temperature MIt passesIt determines refrigeration fan parking, generates refrigeration fan parking signal；
Second judgment unit, for comparing the duration and T of refrigeration fan parkingStop, when the duration of refrigeration fan parking is greater than
Or it is equal to TStopAfterwards, it generates return air defrost and exits signal.
The present invention limits return air firstly, by increasing refrigeration return air defrost most in short-term long Tmin and maximum duration Tmax
The white time to ensure that evaporator surface frost layer is melted completely, while avoiding being not achieved for a long time because of refrigeration defrosting sensor temperature
Refrigeration caused by turn-on temperature is not freezed for a long time, influences the phenomenon that storing food quality, solves to drop because of sensor temperature drift
Low return air defrosting control precision phenomenon avoids the occurrence of the phenomenon that return air defrost is released in advance or do not exited for a long time.
Secondly, avoiding not draining because of refrigeration evaporator surface defrosting water by forcing refrigeration fan parking T1 for a period of time
Lead to stupid ice problem occur, improves the purpose of refrigeration return air defrost reliability.It avoids excluding to be not thorough because of defrosting water to lead to ice cube
Gather in evaporator surface, influences evaporator heat exchange effect.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of refrigeration nature return air defrosting control method characterized by comprising
Stop the signal enabling return air defrost of refrigeration according to refrigerating chamber；
Stop the signal of refrigeration according to the refrigerating chamber, obtains real time environment temperature MRing；
According to the real time environment temperature MRingDetermine return air defrost most in short-term long TminWith return air defrost longest duration Tmax；
According to return air defrost duration T, the return air defrost most in short-term long Tmin, the return air defrost longest duration TmaxAnd refrigerationization
White sensor temperature MIt passesGenerate refrigeration fan parking signal；By return air defrost duration T and the return air defrost most in short-term long TminInto
Row compares；When meeting TminAfter≤T, by evaporator set temperature MIt steamsWith sensor MIt passesIt is compared；When meeting MIt steams≤MIt passesWhen, it is cold
Hide room fan parking；Described by evaporator set temperature MIt steamsWith sensor MIt passesAfter being compared, when meeting MIt steams>MIt passesWhen, it will
The return air defrost duration T and return air defrost longest duration TmaxIt is compared；When meeting TmaxWhen > T, return described by evaporator
Set temperature MIt steamsWith sensor MIt passesIt is compared；When meeting TmaxWhen≤T, refrigerating chamber fan parking；
According to the real time environment temperature MRingDetermine refrigeration fan parking time TStop；
The duration of the fan parking of record refrigeration in real time, when the duration of the refrigeration fan parking is greater than or equal to TStopAfterwards, it exits back
Weathering frost, into refrigeration chamber.
2. refrigeration nature return air defrosting control method as described in claim 1, which is characterized in that described according to the real-time ring
Border temperature MRingDetermine return air defrost most in short-term long TminWith return air defrost longest duration TmaxInclude:
Determine the real time environment temperature MRingLocating temperature stage, all temperature stages are combined into complete variation of ambient temperature
Range intervals；
According to preset temperature stage-defrost duration corresponding relationship, the return air defrost most in short-term long T is determinedmin, the return air
White longest duration Tmax。
3. refrigeration nature return air defrosting control method as claimed in claim 2, which is characterized in that the return air defrost is most in short-term
Long Tmin, the return air defrost longest duration TmaxWith the real time environment temperature MRingIncrease and reduce.
4. refrigeration nature return air defrosting control method as claimed in claim 3, which is characterized in that in the same temperature stage
The real time environment temperature MRingCorresponding identical return air defrost most in short-term long TminWith identical return air defrost longest duration Tmax。
5. refrigeration nature return air defrosting control method as described in claim 1, which is characterized in that according to the real time environment temperature
Spend MRingDetermine refrigeration fan parking time TStopInclude:
Determine the real time environment temperature MRingLocating temperature stage, all temperature stages are combined into complete variation of ambient temperature
Range intervals；
According to preset temperature stage-shutdown duration corresponding relationship, the refrigeration fan parking time T is determinedStop。
6. refrigeration nature return air defrosting control method as claimed in claim 5, which is characterized in that when the refrigeration fan parking
Between TStopWith the real time environment temperature MRingIncrease and reduce；The real time environment temperature M in the same temperature stageRingIt is corresponding
Constant refrigeration fan parking time TStop。
7. the refrigeration nature return air defrost that a kind of perform claim requires any one of 1-6 refrigeration nature return air defrosting control method
Control system characterized by comprising
Return air defrost start and stop module, for stopping the signal enabling return air defrost of refrigeration according to refrigerating chamber；It is moved back according to return air defrost
Signal out closes return air defrost；
Real time environment temperature-measuring module obtains real time environment temperature M for stopping the signal of refrigeration according to the refrigerating chamberRing；
Control module is judged, for according to the real time environment temperature MRingDetermine return air defrost most in short-term long TminWith return air defrost
Longest duration Tmax；According to return air defrost duration T, the return air defrost most in short-term long Tmin, the return air defrost longest duration Tmax
And refrigeration defrosting sensor temperature MIt passesDetermine refrigeration fan parking；According to the real time environment temperature MRingDetermine refrigeration fan parking
Time TStop；When the duration of the refrigeration fan parking is greater than or equal to TStopAfterwards, return air defrost is exited, into refrigeration chamber；
It refrigerates fan parking module and shuts down the refrigeration blower for refrigerating fan parking signal.
8. refrigeration nature return air defrosting control system as claimed in claim 7, which is characterized in that judge that control module includes:
Determination unit, the first judging unit and second judgment unit；
Determination unit, for according to the real time environment temperature MRingDetermine return air defrost most in short-term long TminWith return air defrost longest
Duration Tmax；According to the real time environment temperature MRingDetermine refrigeration fan parking time TStop；
First judging unit, for according to return air defrost duration T, the return air defrost most in short-term long Tmin, the return air defrost most
Long duration TmaxAnd refrigeration defrosting sensor temperature MIt passesIt determines refrigeration fan parking, generates refrigeration fan parking signal；
Second judgment unit, duration and T for the refrigeration fan parkingStop, when the duration of the refrigeration fan parking
More than or equal to TStopAfterwards, it generates return air defrost and exits signal.
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| CN112944753A (en) * | 2019-12-11 | 2021-06-11 | 杭州三花研究院有限公司 | Control system and control method thereof |
| CN111351310A (en) * | 2020-03-25 | 2020-06-30 | 合肥美的电冰箱有限公司 | Refrigeration equipment, defrosting control method and device thereof, and storage medium |
| CN112460905B (en) * | 2020-11-19 | 2022-02-25 | 珠海格力电器股份有限公司 | Refrigerator return air defrosting control method and device and air-cooled refrigerator |
| CN114646178B (en) * | 2020-12-17 | 2023-09-15 | 青岛海尔生物医疗股份有限公司 | Defrosting control method and refrigeration equipment |
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| CN107062793A (en) | 2017-08-18 |
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