CN107270632A - A kind of defrosting method of refrigerator - Google Patents
A kind of defrosting method of refrigerator Download PDFInfo
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- CN107270632A CN107270632A CN201710517939.9A CN201710517939A CN107270632A CN 107270632 A CN107270632 A CN 107270632A CN 201710517939 A CN201710517939 A CN 201710517939A CN 107270632 A CN107270632 A CN 107270632A
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- Prior art keywords
- evaporator
- defrost
- heater strip
- value
- refrigerator
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/006—Defroster control with electronic control circuits
-
- 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
- F25D21/08—Removing frost by electric heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
The invention provides a kind of defrosting method of refrigerator.Defrosting method includes：Determine the initial value of the pressure differential at the lower end of evaporator and between upper end；Judge whether evaporator needs defrost；When evaporator needs defrost, whole heater strips are opened, and in the adjacent heater strip of each two, the heating power of the heater strip in upside is less than the heating power of the heater strip in downside；Detect defrost temperature；And the pressure differential at the lower end of detection evaporator and between upper end, obtain first pressure difference；When defrost temperature reaches the first preset temperature value, or when first pressure difference is less than or equal to initial value, close all heater strips.Can be according to the pressure differential between at the frosting degree of diverse location on evaporator, defrost temperature, the lower end of evaporator and upper end, the appropriate thermal discharge for reducing heater strip at diverse location, so that the evaporator of refrigerator can defrost on demand, both power consumption can be reduced, defrost duration is reduced, fresh-keeping effect can also be strengthened.
Description
Technical field
The present invention relates to refrigerating storing field, more particularly to a kind of defrosting method of refrigerator.
Background technology
Refrigerator is to maintain a kind of refrigeration plant of constant low temperature, is also that one kind makes food or other articles keep constant low temperature
The product for civilian use of cold conditions.Air-cooled technology is by built-in hiding cooler (such as the evaporator of coolant circulating system) to flowing through it
Air freezed, force circulating cold air to flow by fan, so that cold air is uniformly distributed in refrigerator each compartment, realize
Refrigeration.When air passes through evaporator surface in refrigerator, the moisture in air can condense in evaporator surface, due to evaporator temperature
Spend low, frost layer is formed after a period of time, causes evaporator heat transfer efficiency to decrease up to evaporator and is completely plugged and fails, drop
Low refrigerator operational efficiency, it is necessary to carry out defrost after operation a period of time.
Existing defrost is generally provided with electric heater in base of evaporator, when evaporator surface frost layer reaches certain thickness,
Refrigerator stops refrigeration, and heater is started working, heating and melting frost layer.During defrost is carried out to evaporator, the bottom of evaporator
Portion is first heated, therefore the frost of base of evaporator is first begin to melt, and the frost in the middle part of finisher and top is just gradually melted,
Therefore time for being heated of the heated device of base of evaporator is long, be very easy to cause the working of plastics of base of evaporator by
There is the phenomenon of aged deterioration in heated time length.Frost on evaporator is in the process gradually melted as water from the bottom to top
In to absorb substantial amounts of heat, and the thawing time is more very long, there is serious heat waste phenomenon.
The content of the invention
Inventor thinks that the mode of present refrigerator inside defrost is essentially all to carry out defrost based on experience value, but refrigerator
According to the change of normal service condition and environment, internal frosting velocity is different, and, because for evaporator in itself
Relation of wind direction etc., evaporator diverse location frosting velocity is also different, is carried out in base of evaporator provided with electric heater
Frost on defrost, evaporator will absorb substantial amounts of heat during gradually thawing from the bottom to top is water, and when melting
Between it is more very long, there is serious heat waste phenomenon.
Therefore, the present invention is intended to provide a kind of defrosting method for refrigerator, can make evaporator defrost on demand, on demand defrost
Not only include carrying out defrost according to the frosting position of evaporator, in addition to apply the heat being adapted according to frost layer amount at each position
Amount, it is extremely important to change the frost of evaporator diverse location on demand, so can both reduce power consumption, reduces defrost duration, also may be used
To strengthen fresh-keeping effect.
Specifically, the invention provides a kind of defrosting method of refrigerator, wherein the refrigerator include evaporator and it is multiple plus
Heated filament；Each heater strip is horizontally extending, and short transverse interval of multiple heater strips along the evaporator
Set；Each heater strip is configured to directly or indirectly heat the evaporator；And the defrosting method includes：
Determine the initial value of the pressure differential at the lower end of the evaporator and between upper end；
Judge whether evaporator needs defrost；
When the evaporator needs defrost, all heater strips are opened, so that each heater strip heating is carried out
Defrost, and in the adjacent heater strip of each two, be less than the heating power of the heater strip in upside and be in down
The heating power of the heater strip of side；
Detect defrost temperature；And the pressure differential at the lower end of the detection evaporator and between upper end, obtain first
Pressure difference value；
When the defrost temperature reaches the first preset temperature value, or in the first pressure difference less than or equal to described
During initial value, close all heater strips to complete defrost.
Alternatively, determined to detect the pressure differential at the lower end of the evaporator and between upper end according to the defrost temperature
Opportunity.
Alternatively, detected when the defrost temperature reaches the second preset temperature value at the lower end of the evaporator and upper end
Between pressure differential；Second preset temperature value is less than first preset temperature value.
Alternatively, detected when the defrost temperature reaches three preset temperature values at the lower end of the evaporator and upper end
Between pressure differential；3rd preset temperature value is less than first preset temperature value, and the 3rd preset temperature value
More than second preset temperature value.
Alternatively, after the defrost temperature reaches second preset temperature value, often improve pre- in the defrost temperature
If during temperature gap, detecting the pressure differential at the lower end of the evaporator and between upper end.
Alternatively, the refrigerator includes blower fan and differential pressure pick-up, be configured with the blower fan drive air current flow with
The differential pressure pick-up is set to detect the pressure differential at the lower end of the evaporator and between upper end.
Alternatively, during pressure differential at the lower end for detecting the evaporator and between upper end, the blower fan is made the
Operated under one predeterminated voltage, the differential pressure pick-up exports multiple first detected values, first pressure in the first preset time
Power difference is maximum first detected value.
Alternatively, the initial value at the lower end for determining the evaporator with the pressure differential between upper end includes：
The refrigerator is when opening, and the refrigerator first runs well preset duration, after make the blower fan in the second default electricity
Pressure operating, the differential pressure pick-up exports multiple second detected values in the second preset time；
The average value of multiple second detected values is calculated, and the initial value is the average value.
Alternatively, it is described to judge whether evaporator needs defrost to include：
After initial value determination or after completion defrost every time in the 3rd preset time, the blower fan normal work,
The differential pressure pick-up detects the pressure differential at the lower end of the evaporator and between upper end, obtains second pressure difference；
If the second pressure difference is more than or equal to the initial value, and judges that the evaporator needs defrost；Otherwise
After initial value determination or in three preset time after completing defrost every time, make the blower fan under the 3rd predeterminated voltage
Operating, the differential pressure pick-up exports multiple 3rd detected values in the 4th preset time, and makes the 3rd detection of maximum
It is worth for the 3rd pressure difference value；
If the 3rd pressure difference value is more than or equal to the initial value, and judges that the evaporator needs defrost；Otherwise
Make the preset time of blower fan normal work the 5th, Posterior circle makes the blower fan be operated under the 3rd predeterminated voltage described in,
The differential pressure pick-up exports multiple 3rd detected values in the 4th preset time, and makes the 3rd detected value of maximum be the
Three pressure difference values；5th preset time is less than the 3rd preset time.
Alternatively, when the evaporator needs defrost, also close at least the inlet air door of the storing compartment of the refrigerator
Close；
The refrigerator also includes temperature sensor, and the temperature sensor is arranged at the top of the evaporator, is configured to
Detect the defrost temperature；And
Second preset temperature value is 3.6 DEG C to 4.4 DEG C；
First preset temperature value is 6.6 DEG C to 7.4 DEG C；
In the adjacent heater strip of each two, the resistance of the heater strip in upside is less than the institute in downside
The resistance of heater strip is stated, so that the refrigerator applies identical voltage on each heater strip；Or, it is adjacent in each two
In the heater strip, the resistance of the heater strip in upside is equal to the resistance of the heater strip in downside, so that institute
State refrigerator and apply different voltages on each heater strip, so as in the adjacent heater strip of each two, make to be in
The heating power of the heater strip of upside is less than the heating power of the heater strip in downside.
The defrosting method of the refrigerator of the present invention can be according to the frosting degree of diverse location, defrost temperature, evaporator on evaporator
Lower end at and upper end between pressure differential, the appropriate thermal discharge for reducing heater strip at diverse location, so that the evaporation of refrigerator
Device can defrost on demand, it is extremely important to change the frost of evaporator diverse location on demand, so can both reduce power consumption, reduces defrost
Duration, can also strengthen fresh-keeping effect.
Further, refrigerator of the invention can judge to evaporate according to the pressure differential between at the lower end of evaporator and upper end
The frosting degree of device and then judge whether evaporator needs defrost, quick and precisely, accurately and effectively to enter defrosting operation, so that
The frost adhered on evaporator can in time be melted, it is to avoid defrosting operation need not be being carried out during defrost, so as to save electricity
Energy.
According to the accompanying drawings to the detailed description of the specific embodiment of the invention, those skilled in the art will be brighter
Above-mentioned and other purposes, the advantages and features of the present invention.
Brief description of the drawings
Some specific embodiments of the present invention are described in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that these
What accompanying drawing was not necessarily drawn to scale.In accompanying drawing：
Fig. 1 is the schematic diagram of refrigerator according to an embodiment of the invention；
Fig. 2 is the schematic local structural graph of refrigerator according to an embodiment of the invention；
Fig. 3 is the schematic side elevation of structure shown in Fig. 2；
Fig. 4 is the indicative flowchart of the defrosting method of refrigerator according to an embodiment of the invention.
Embodiment
Fig. 1 is the schematic diagram of refrigerator according to an embodiment of the invention；Fig. 2 is according to one implementation of the present invention
The schematic local structural graph of the refrigerator of example；Fig. 3 is the schematic side elevation of structure shown in Fig. 2.As shown in Figure 1, Figure 2 and Figure 3,
The embodiments of the invention provide a kind of refrigerator.The refrigerator may include casing 10, door body, refrigeration system, blower fan, the detection of frosting situation
Device, defrosting heater and temperature sensor.
There are multiple storing compartments in casing 10.Storing compartment is used to store food.Multiple storages in the embodiment of the present invention
Thing compartment may include the refrigerating chamber 11 of often storage vegetables, and its temperature-control range is general at -5 DEG C to 7 DEG C.Multiple storing compartments may be used also
Including refrigerating chamber 12, temperature-changing chamber etc..Door body can be to be multiple, and each door body is configured to controllably to open or close between a storing
Room.Further, casing 10 also has compressor bin, cooling chamber, and connects the ducting system of storing compartment and cooling chamber.It is cold
But room can be at the rear side of refrigerating chamber 12.In Fig. 1, the air duct cover board between cooling chamber and refrigerating chamber 12 is not shown.
Refrigerant system configuration is into cold is provided to reduce indoor temperature between storing.Specifically, refrigeration system can be compression
Formula refrigeration system, it includes compressor, condenser, throttling arrangement and evaporator 20 etc..Compressor may be disposed in compressor bin.
Evaporator 20 may be disposed in cooling chamber, be configured with entering the gas temperature in the refrigerant reduction cooling chamber in it, to pass through
By ducting system make storing between indoor temperature be maintained in preset temperature or preset temperature range.Blower fan, which can be configured to, to be promoted
Air-flow flows to storing compartment from cooling chamber, and flows back to cooling chamber from storing compartment, and makes air-flow from evaporator 20 in cooling chamber
Lower end flowed to upper end.
Frosting situation detection means may be disposed in cooling chamber, for making refrigerator according to the detection of frosting situation detection means
As a result judge whether refrigerator needs defrost.Frosting situation detection means may include under differential pressure pick-up 60, detection evaporator 20
Pressure differential at end and between upper end, so that refrigerator determines the frost thickness on evaporator 20 according to pressure differential, and then can be true
The fixed opportunity for entering defrosting or terminating defrosting.In refrigerator, air-flow typically flows from the lower end of evaporator to upper end.Under evaporator
The windage situation of the size reactive evaporation device upper and lower ends of pressure differential at end and between upper end, pressure differential is more big, shows to steam
The windage for sending out device is bigger, then frost layer that can be on baudelot evaporator 20 is thicker, bigger to the resistance of wind.
Defrosting heater can have multiple heater strips 40.Each heater strip 40 can be horizontally extending, and it is multiple plus
Short transverse of the heated filament 40 along evaporator 20 is arranged at intervals, and each heater strip 40 is configured to directly or indirectly heating evaporation device
20, so that multiple heater strips 40 can be heated at multiple different height positions to evaporator 20.Further, defrosting is heated
Device may also include heat-conducting plate 30.Heat-conducting plate 30 is arranged at the side of evaporator 20, and thermally contacts and (connect with evaporator 20
Touch is thermally coupled).Each heater strip 40 is thermally contacted with heat-conducting plate 30.Heat-conducting plate 30 can be used for making heat spread at heater strip 40
Onto evaporator 20, defrosting efficiency is improved.In some preferred embodiments of the present invention, heat-conducting plate 30 is arranged at multiple heating
Between silk 40 and evaporator 20, the heat transfer that each heater strip 40 is produced to evaporator 20.It is preferable to carry out at other
In example, multiple heater strips 40 are arranged in heat-conducting plate 30.
Temperature sensor is preferably provided at the top of evaporator 20, is configured to detect the defrost temperature of evaporator 20.
In some alternate embodiments, temperature sensor may be disposed on evaporator 20.
Fig. 4 is the indicative flowchart of the defrosting method of refrigerator according to an embodiment of the invention.As shown in figure 4, special
Not, the embodiment of the present invention additionally provides a kind of defrosting method of refrigerator.Defrosting method may include：
Determine the initial value of the pressure differential at the lower end of evaporator 20 and between upper end.
Judge whether evaporator 20 needs defrost.
When evaporator 20 needs defrost, whole heater strips 40 are opened, so that each heating of heater strip 40 carries out defrost.It is special
Not, in the adjacent heater strip 40 of each two, the heating power of the heater strip 40 in upside is made to be less than adding in downside
The heating power of heated filament 40.Further, the air intake wind of the storing compartment of refrigerator is also at least made when evaporator 20 needs defrost
Door is closed.
Detect defrost temperature；And the pressure differential at the lower end of detection evaporator 20 and between upper end, obtain the first pressure
Power difference.
When defrost temperature reaches the first preset temperature value, or when first pressure difference is less than or equal to initial value, close
All heater strips 40 are closed to complete defrost.Temperature sensor is preferably provided at the top of evaporator 20；First preset temperature
Value is preferably 6.6 DEG C to 7.4 DEG C, such as 6.9 DEG C, 7 DEG C.
In some embodiments of the invention, in the adjacent heater strip 40 of each two, the heater strip 40 in upside
Resistance is smaller than the resistance of the heater strip 40 in downside, so that refrigerator applies identical voltage on each heater strip, every
In two adjacent heater strips 40, the heating power of the heater strip 40 in upside is set to be less than the hair of the heater strip 40 in downside
Thermal power.Or in other embodiments of the present invention, in the adjacent heater strip 40 of each two, the heater strip 40 in upside
Resistance can be equal to the resistance of the heater strip 40 in downside so that refrigerator applies different voltages on each heater strip 40,
So as in the adjacent heater strip 40 of each two, make the heating power of the heater strip 40 in upside be less than the heating in downside
The heating power of silk 40.For example, multiple heater strips can be 4, the bottom maximum temperature of heater strip 40 can be 100 DEG C, from it is lower to
Upper second heater strip 40 maximum temperature is 85 DEG C, and the 3rd maximum temperature of heater strip 40 is 75 DEG C from bottom to up, and the 4th adds
The maximum temperature of heated filament can be 70 DEG C.
In this embodiment, according to the rule of the frosting of evaporator 20, the general bottom frosting velocity of evaporator 20 is faster than evaporation
The upper end of device 20, in defrost, suitably can first make that the heating power of part heater strip is smaller, part heater strip heating power compared with
Greatly, so that defrost on demand can be realized, so that the relatively thin local frost layer of evaporator obtains appropriate heat, electric energy is saved.Namely
Say that this heating defrost mode can effectively reduce the defrost time, and during defrost, power consumption needed for whole defrost is reduced,
And internal temperature of refrigerator fluctuation can be effectively reduced.
The present invention some preferred embodiments in, can according to defrost temperature determine detect evaporator 20 lower end at
On the opportunity of pressure differential between upper end, preferably to determine the opportunity for terminating defrost, shorten defrost duration, so as to improve refrigerator
Efficiency, saves the energy.
Specifically, in some specific embodiments of the present invention, examined when defrost temperature reaches the second preset temperature value
Survey the pressure differential at the lower end of evaporator and between upper end；Second preset temperature value is less than the first preset temperature value.Second is pre-
If temperature value can be 3.6 DEG C to 4.4 DEG C, such as 3.9 DEG C, 4 DEG C.Further, it can also reach that the 3rd presets in defrost temperature
The pressure differential at the lower end of evaporator 20 and between upper end is detected during temperature value；3rd preset temperature value is less than the first default temperature
Angle value, and more than the second preset temperature value.3rd preset temperature value can be 5 DEG C to 6 DEG C, such as 5 DEG C, 5.2 DEG C, 5.5 DEG C, 5.6 DEG C,
6 DEG C etc..
The present invention other specifically in embodiment, steaming can be detected when defrost temperature reaches the second preset temperature value
Send out the pressure differential at the lower end of device 20 and between upper end.And after defrost temperature reaches the second preset temperature value, in defrost
When temperature often improves preset temperature difference, the pressure differential at the lower end of evaporator 20 and between upper end is detected.Preset temperature is poor
Value can be 0.3 to 0.8 DEG C.For example, the second preset temperature value can be 4 DEG C, preset temperature difference be 0.5 DEG C, then can 4.5 DEG C, 5
DEG C, 5.5 DEG C etc. when detection evaporator 20 lower end at and upper end between pressure differential.
Preferably, detect evaporator 20 lower end at upper end between pressure differential when, make blower fan first preset
Operated under voltage, differential pressure pick-up exports multiple first detected values in the first preset time, first pressure difference is maximum
First detected value.First predeterminated voltage can be 11V to 13V, such as 11V, 12V, 13V.First preset time can be for 1.5s extremely
2.5s, such as 1.5s, 1.8s, 2s, 2.2s.
In some embodiments of the invention, determine initial with the pressure differential between upper end at the lower end of evaporator 20
Value may include：Refrigerator open when, make refrigerator normal operation preset duration, after blower fan is operated under the second predeterminated voltage, it is poor
Pressure sensor detects the pressure differential at the lower end of evaporator 20 and between upper end, output multiple second in the second preset time
Detected value.The average value of multiple second detected values is calculated, and initial value is the average value of multiple second detected values.Preset duration can
For 2min to 6min, such as 3min, 4min, 5min.Second predeterminated voltage can be 11V to 13V, such as 11V, 12V, 13V.The
Two preset times can be 50s to 80s, preferably 60s, 70s etc..Further, the storing of refrigerator also can at least be made in detection
The inlet air door of compartment is closed.In some alternate embodiments, when refrigerator is opened, it can directly make blower fan in the second default electricity
Pressure operating, does not make refrigerator first run well preset duration.In other alternate embodiments, initial value can be preset value,
Refrigerator is directly set when developing.
In some embodiments of the invention, it is preferred to use the testing result of differential pressure pick-up 60 is to judge evaporator 20
It is no to need defrost.Specifically, judge whether evaporator 20 needs defrost to include：
After initial value determination or after completion defrost every time in the 3rd preset time, blower fan normal work (is also just meaned
Refrigerator normal work), differential pressure pick-up detects the pressure differential at the lower end of evaporator 20 and between upper end, obtains the second pressure
Power difference.3rd preset time can be 3H to 5H, such as can be 3.8H, 4H, 4.5H.
If second pressure difference is more than or equal to initial value, and judges that evaporator 20 needs defrost；Otherwise it is true in initial value
After fixed or in three preset time after completing defrost every time, blower fan is set to be operated under the 3rd predeterminated voltage, differential pressure pick-up exists
Multiple 3rd detected values of output in 4th preset time, and make the 3rd detected value of maximum for the 3rd pressure difference value.3rd presets
Voltage can be 11V to 13V, such as 11V, 12V, 13V.4th preset time can be 8s to 12s, preferably 9s, 10s etc..
If the 3rd pressure difference value is more than or equal to initial value, and judges that evaporator 20 needs defrost；Otherwise make blower fan normal
Work the 5th preset time, and Posterior circle, which enters, makes blower fan be operated under the 3rd predeterminated voltage, and differential pressure pick-up is when the 4th is default
Interior multiple 3rd detected values of output, and make the 3rd detected value of maximum for the 3rd pressure difference value.5th preset time can be
0.6H to 1.5H, such as can be 0.8H, 1H, 1.25H.
In some alternate embodiments of the present invention, also can according to the continuous operating time of the compressor of refrigerator and/or
The total run time of compressor judges whether evaporator 20 needs defrost.Also the temperature that can be detected according to temperature sensor judges
Whether evaporator 20 needs defrost.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple showing for the present invention
Example property embodiment, still, still can be direct according to present disclosure without departing from the spirit and scope of the present invention
It is determined that or deriving many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognized
It is set to and covers other all these variations or modifications.
Claims (10)
1. a kind of defrosting method of refrigerator, wherein the refrigerator includes evaporator and multiple heater strips；Each heater strip edge
Horizontal direction extends, and short transverse of multiple heater strips along the evaporator is arranged at intervals；Each heater strip is matched somebody with somebody
It is set to and directly or indirectly heats the evaporator；And the defrosting method includes：
Determine the initial value of the pressure differential at the lower end of the evaporator and between upper end；
Judge whether the evaporator needs defrost；
When the evaporator needs defrost, all heater strips are opened, so that each heater strip heating carries out defrost,
And in the adjacent heater strip of each two, the heating power of the heater strip in upside is less than the institute in downside
State the heating power of heater strip；
Detect defrost temperature；And the pressure differential at the lower end of the detection evaporator and between upper end, obtain first pressure
Difference；
It is initial less than or equal to described when the defrost temperature reaches the first preset temperature value, or in the first pressure difference
During value, close all heater strips to complete defrost.
2. defrosting method according to claim 1, wherein
The opportunity of the pressure differential at the lower end of the detection evaporator and between upper end is determined according to the defrost temperature.
3. defrosting method according to claim 2, wherein
The pressure at the lower end of the evaporator and between upper end is detected when the defrost temperature reaches the second preset temperature value
Power is poor；Second preset temperature value is less than first preset temperature value.
4. defrosting method according to claim 3, wherein
The pressure at the lower end of the evaporator and between upper end is detected when the defrost temperature reaches three preset temperature values
Power is poor；3rd preset temperature value is less than first preset temperature value, and the 3rd preset temperature value is more than described the
Two preset temperature values.
5. defrosting method according to claim 3, wherein
After the defrost temperature reaches second preset temperature value, preset temperature difference is often improved in the defrost temperature
When, detect the pressure differential at the lower end of the evaporator and between upper end.
6. defrosting method according to claim 1, wherein
The refrigerator includes blower fan and differential pressure pick-up, is configured with the blower fan and drives air current flow so that the differential pressure is passed
Sensor detects the pressure differential at the lower end of the evaporator and between upper end.
7. defrosting method according to claim 6, wherein
During pressure differential at the lower end for detecting the evaporator and between upper end, make the blower fan under the first predeterminated voltage
Operating, the differential pressure pick-up exports multiple first detected values in the first preset time, and the first pressure difference is maximum
First detected value.
8. defrosting method according to claim 6, wherein
Initial value at the lower end for determining the evaporator with the pressure differential between upper end includes：
The refrigerator is when opening, and the refrigerator first runs well preset duration, after make the blower fan under the second predeterminated voltage
Operating, the differential pressure pick-up exports multiple second detected values in the second preset time；
The average value of multiple second detected values is calculated, and the initial value is the average value.
9. defrosting method according to claim 8, wherein
It is described to judge whether evaporator needs defrost to include：
After initial value determination or complete every time after defrost in the 3rd preset time, the blower fan normal work is described
Differential pressure pick-up detects the pressure differential at the lower end of the evaporator and between upper end, obtains second pressure difference；
If the second pressure difference is more than or equal to the initial value, and judges that the evaporator needs defrost；Otherwise in institute
State after initial value is determined or in three preset time after completing defrost every time, the blower fan is transported under the 3rd predeterminated voltage
Turn, the differential pressure pick-up exports multiple 3rd detected values in the 4th preset time, and makes the 3rd detected value of maximum
For the 3rd pressure difference value；
If the 3rd pressure difference value is more than or equal to the initial value, and judges that the evaporator needs defrost；Otherwise institute is made
The preset time of blower fan normal work the 5th is stated, Posterior circle makes the blower fan be operated under the 3rd predeterminated voltage described in, described
Differential pressure pick-up exports multiple 3rd detected values in the 4th preset time, and makes the 3rd detected value of maximum for the 3rd pressure
Power difference；5th preset time is less than the 3rd preset time.
10. defrosting method according to claim 3, wherein
When the evaporator needs defrost, also close at least the inlet air door of the storing compartment of the refrigerator；
The refrigerator also includes temperature sensor, and the temperature sensor is arranged at the top of the evaporator, is configured to detection
The defrost temperature；And
Second preset temperature value is 3.6 DEG C to 4.4 DEG C；
First preset temperature value is 6.6 DEG C to 7.4 DEG C；
In the adjacent heater strip of each two, the resistance of the heater strip in upside is less than to be in described in downside and added
The resistance of heated filament, so that the refrigerator applies identical voltage on each heater strip；Or, in each two it is adjacent described in
In heater strip, the resistance of the heater strip in upside is equal to the resistance of the heater strip in downside, so that the ice
Case applies different voltages on each heater strip, so as in the adjacent heater strip of each two, make to be in upside
The heater strip heating power be less than in downside the heater strip heating power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710517939.9A CN107270632B (en) | 2017-06-29 | 2017-06-29 | defrosting method for refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710517939.9A CN107270632B (en) | 2017-06-29 | 2017-06-29 | defrosting method for refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107270632A true CN107270632A (en) | 2017-10-20 |
| CN107270632B CN107270632B (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710517939.9A Active CN107270632B (en) | 2017-06-29 | 2017-06-29 | defrosting method for refrigerator |
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| CN (1) | CN107270632B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129030A (en) * | 2020-09-24 | 2020-12-25 | 合肥美的电冰箱有限公司 | Air duct assembly of refrigerator and refrigerator |
| CN112833606A (en) * | 2019-11-25 | 2021-05-25 | 青岛海尔电冰箱有限公司 | Evaporator assembly, refrigerator and control method of refrigerator |
| CN113606847A (en) * | 2021-08-10 | 2021-11-05 | 合肥美菱物联科技有限公司 | Defrosting device for refrigerator evaporator |
| CN113639499A (en) * | 2021-08-05 | 2021-11-12 | 珠海格力电器股份有限公司 | Heater control system, defrosting control method, refrigerating system and refrigerator |
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| JP2006300440A (en) * | 2005-04-22 | 2006-11-02 | Sharp Corp | Refrigerator |
| CN203642588U (en) * | 2013-09-05 | 2014-06-11 | 徐州市精英冷暖设备工程有限公司 | Intelligent leeway type defrosting device for cold storage |
| CN105783387A (en) * | 2016-04-29 | 2016-07-20 | 合肥美的电冰箱有限公司 | Defrosting control method, defrosting control device and refrigerator |
| CN106595215A (en) * | 2016-11-11 | 2017-04-26 | 青岛海尔股份有限公司 | Defrosting control method and device of air-cooled refrigerator |
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| JP2006300440A (en) * | 2005-04-22 | 2006-11-02 | Sharp Corp | Refrigerator |
| CN203642588U (en) * | 2013-09-05 | 2014-06-11 | 徐州市精英冷暖设备工程有限公司 | Intelligent leeway type defrosting device for cold storage |
| CN105783387A (en) * | 2016-04-29 | 2016-07-20 | 合肥美的电冰箱有限公司 | Defrosting control method, defrosting control device and refrigerator |
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Cited By (4)
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| CN112833606A (en) * | 2019-11-25 | 2021-05-25 | 青岛海尔电冰箱有限公司 | Evaporator assembly, refrigerator and control method of refrigerator |
| CN112129030A (en) * | 2020-09-24 | 2020-12-25 | 合肥美的电冰箱有限公司 | Air duct assembly of refrigerator and refrigerator |
| CN113639499A (en) * | 2021-08-05 | 2021-11-12 | 珠海格力电器股份有限公司 | Heater control system, defrosting control method, refrigerating system and refrigerator |
| CN113606847A (en) * | 2021-08-10 | 2021-11-05 | 合肥美菱物联科技有限公司 | Defrosting device for refrigerator evaporator |
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|---|---|
| CN107270632B (en) | 2019-12-10 |
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