CN115406152B - Refrigerator and defrosting control method - Google Patents
Refrigerator and defrosting control method Download PDFInfo
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- CN115406152B CN115406152B CN202211040062.6A CN202211040062A CN115406152B CN 115406152 B CN115406152 B CN 115406152B CN 202211040062 A CN202211040062 A CN 202211040062A CN 115406152 B CN115406152 B CN 115406152B
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- 238000010257 thawing Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000009471 action Effects 0.000 claims abstract description 5
- 238000007710 freezing Methods 0.000 claims description 59
- 230000008014 freezing Effects 0.000 claims description 59
- 238000005057 refrigeration Methods 0.000 claims description 51
- 230000000903 blocking effect Effects 0.000 claims description 23
- 239000006260 foam Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 4
- 230000004308 accommodation Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
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
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- F25D17/08—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation using ducts
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention relates to the technical field of refrigerators, and particularly discloses a refrigerator and a defrosting control method. The refrigerating system comprises a compressor, a condenser, a dry filter, a first electronic expansion valve, a second electronic expansion valve, a first evaporator and a second evaporator which are connected in parallel. The exhaust pipe of the compressor is connected with the air inlet of the condenser, the air outlet of the condenser is connected with the inlet of the dry filter, two branches are connected in parallel between the outlet of the dry filter and the air return pipe of the compressor, and each branch is sequentially connected with an electronic expansion valve and an evaporator in series. When the evaporator alternately defrosts, the electronic expansion valve of the branch where the defrosting evaporator is located is closed, and meanwhile, the corresponding air door is closed, and the corresponding return air channel is closed under the action of the air door, so that the defrosting evaporator is located in an independent closed small chamber. The invention not only realizes the constant indoor temperature between the storage rooms of the refrigerator during defrosting, but also can reduce the energy consumption of the refrigerator and shorten the defrosting period.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to a refrigerator and a defrosting control method.
Background
In the prior art, frost condensed on an evaporator of an air-cooled refrigerator is usually removed by adopting a thermal evaporation mode. The refrigerator typically pauses cooling after a period of operation of the refrigerator while the defrost heating system is activated to heat the evaporator. The frost condensed on the evaporator becomes water after being heated, and the frost water is discharged through a special conduit. The above defrosting process is automatically completed in the refrigerator without the need of a user to manually defrost the refrigerator, so the air-cooled refrigerator is also called an automatic defrosting refrigerator in the industry.
With the improvement of living standard and quality of people, the demands of people on the large-volume refrigerator are more and more high. This places higher demands on the evaporator of a large volume air cooled refrigerator. The volume of the required evaporator is larger, the working efficiency is higher, and the refrigerating effect of the evaporator is better. When the evaporator meets the above requirements, more frost is condensed on the surface of the evaporator, so that defrosting of the air-cooled refrigerator is a problem that the refrigerating condition of the refrigerator is directly affected, and people are more and more concerned.
At present, when the air-cooled refrigerator is used for defrosting, the refrigerator is heated by the heating wire, so that defrosting stop time is about 30 minutes to 1 hour, and the refrigerator cannot be refrigerated at the stage, so that the indoor temperature fluctuation of the storage room is large.
Disclosure of Invention
The invention aims to provide a refrigerator, which effectively solves the problem that the refrigerator cannot refrigerate when an air-cooled refrigerator is used for defrosting, so that the indoor temperature of a storage room fluctuates greatly.
In order to solve the technical problems, the invention adopts the following technical scheme:
the refrigerator comprises a refrigerator body, a controller and a refrigerating system, wherein a refrigerating room and a freezing room are arranged in the refrigerator body, the refrigerating room is arranged below the refrigerating room, the refrigerating system comprises a compressor, a condenser, a first evaporator and a second evaporator which are connected in parallel, and the refrigerating system further comprises a drying filter, a first electronic expansion valve and a second electronic expansion valve.
The exhaust pipe of the compressor is connected with the air inlet of the condenser, the air outlet of the condenser is connected with the inlet of the dry filter, two branches are connected in parallel between the outlet of the dry filter and the air return pipe of the compressor, the first branch is sequentially connected with the first electronic expansion valve and the first evaporator in series, and the second branch is sequentially connected with the second electronic expansion valve and the second evaporator in series.
When the two evaporators alternately defrost, the electronic expansion valve of the branch where the evaporator to defrost is located is closed, and the evaporator of the other branch normally performs refrigeration cycle.
When the two evaporators are used for normal refrigeration, the first electronic expansion valve and the second electronic expansion valve are both opened, and the two branches are used for refrigeration circulation at the same time.
Further, a refrigerating air duct assembly is arranged at the back of the refrigerating compartment, and a first refrigerating return air channel and a second refrigerating return air channel are arranged in the refrigerating air duct assembly.
The freezing wind channel subassembly includes the front shroud, is located the back shroud of front shroud rear side, is located the fan between front shroud and the back shroud, is located the freezing wind channel foam of back shroud below, first air door, second air door, is used for controlling the first freezing return air passageway deep bead that opens and shuts of first freezing return air passageway and is used for controlling the second freezing return air passageway deep bead that opens and shuts of second freezing return air passageway.
The freezing wind channel foam includes antetheca, roof and median septum, the median septum separates freezing wind channel foam into be used for setting up the first evaporimeter cavity of first evaporimeter and be used for setting up the second evaporimeter cavity of second evaporimeter, first evaporimeter cavity top is equipped with the first opening that opens and shuts by first air door control, second evaporimeter cavity top is equipped with the second opening that opens and shuts by the control of second air door.
A fan cavity is arranged above the first air door and the second air door, and the fan cavity is respectively communicated with the first evaporator cavity and the second evaporator cavity through a first opening and a second opening.
The upper end part of the first freezing return air channel wind shield and the upper end part of the second freezing return air channel wind shield are connected with the freezing air channel rear cover plate through a plurality of wind shield telescopic springs, the first freezing return air channel wind shield is inserted into the front wall of the first evaporator chamber, and the second freezing return air channel wind shield is inserted into the front wall of the second evaporator chamber.
When the air door is opened, the wind shield telescopic springs on the same side of the air door pull the wind shields of the corresponding freezing return air channels, and the corresponding freezing return air channels are opened.
When the air door is closed, the air shields of the freezing air return channels on the same side of the air door are pressed together, and the corresponding freezing air return channels are closed.
Further, the back of box is equipped with first cold-stored return air pipeline and the cold-stored return air pipeline of second, be equipped with the first cold-stored return air passageway air blocking subassembly that is used for controlling first cold-stored return air pipeline to open and shut and the cold-stored return air passageway air blocking subassembly of the second that is used for controlling second cold-stored return air pipeline to open and shut in the fan chamber, the first cold-stored return air passageway air blocking subassembly and the cold-stored return air passageway air blocking subassembly of second all include subassembly base, two subassembly springs, subassembly shell and subassembly expansion baffle.
The assembly comprises an assembly base and an assembly shell, wherein the assembly base is connected with the assembly shell in an inserting mode, two sides of the assembly base are respectively provided with an accommodating cavity for accommodating an assembly spring, two sides of an assembly telescopic baffle are respectively fixed with a telescopic rod, the free end of each telescopic rod is connected with one end of each assembly spring, the other end of each assembly spring is connected with the middle of each accommodating cavity, and a sliding cavity for enabling the assembly telescopic baffle to freely move in a telescopic mode is formed in the assembly shell.
Through the tip and the subassembly spring coupling of telescopic link, subassembly base, subassembly shell and the flexible baffle of subassembly are connected into an organic wholely, lie in accommodation chamber, telescopic link and the subassembly spring of homonymy this moment and be in same horizontal axis.
Further, the component base and the component shell are equal in width and height, the component base is connected with the component shell along the length direction of the component base, the width of the component telescopic baffle is smaller than that of the component shell, and the height of the component telescopic baffle is smaller than that of the component shell.
Further, be equipped with the vent on the flexible baffle of subassembly, when the air door was opened, the air door contacted and extruded the flexible baffle of subassembly, the vent link up with cold-stored return air pipeline, and when the air door was closed, the flexible baffle of subassembly was stretched under the effect of subassembly spring, the part outside the vent seals cold-stored return air pipeline.
Further, temperature sensors are arranged in the first evaporator chamber, close to the first air door, the second air door and the fan chamber, and are connected with the controller.
The invention further aims to provide a defrosting control method, which is used for effectively solving the problem that the refrigerator cannot refrigerate during defrosting of the air-cooled refrigerator, so that the indoor temperature of the storage compartment fluctuates greatly.
The defrosting control method is applied to the refrigerator in the embodiment, and the first evaporator and the second evaporator alternately defrost, and comprises the following steps:
s1, when the first evaporator is frosted, the second evaporator is used for normally refrigerating, at the moment, the first electronic expansion valve is closed, and the second electronic expansion valve is normally opened;
s2, the first air door is gradually closed, the second air door is normally opened, the component telescopic baffle of the first refrigeration return air channel air blocking component is gradually stretched under the action of the component spring, and the part, except the vent, of the component telescopic baffle completely closes the first refrigeration return air pipeline; simultaneously, in the closing process of the first air door, after the first air door rotates by a certain angle, the first air door contacts and extrudes the wind shield of the first freezing return air channel, and when the first air door is completely closed, the first freezing return air channel is completely closed.
S3, after defrosting of the first evaporator is finished, the first electronic expansion valve is opened, the first evaporator is used for normally refrigerating, and the first air door is still closed;
s4, when the temperature in the first evaporator cavity is the same as the temperature in the fan cavity, the first air door is opened;
s5, when the first air door is opened, the first air door contacts and presses the component telescopic baffle of the first refrigeration return air channel air blocking component, the component telescopic baffle compresses the component spring while being pressed, and the ventilation opening on the component telescopic baffle is communicated with the first refrigeration return air pipeline; meanwhile, the first freezing return air channel wind shield is opened under the tensile force of the wind shield telescopic spring;
s6, after the first air door is opened, defrosting of the second evaporator is started, the steps S1-S5 are repeated, and the first in the corresponding steps S1-S5 is replaced by the second.
The beneficial technical effects of the invention are as follows:
(1) Through the connection structure design of the refrigerating system, the air-cooled refrigerator can defrost, and the refrigerating system normally provides cold for the storage compartment of the refrigerator, so that the temperature in the storage compartment is kept constant.
(2) Through independent double air door design and the design of freezing wind channel subassembly, place independent inclosed cavity respectively with two evaporators to make defrosting and refrigeration isolation, realize that the temperature of two evaporators defrosting and storing room is invariable in turn, also improved defrosting efficiency simultaneously, reduced the refrigerator energy consumption.
(3) Through wind channel structural design, the motion of the stifled wind gap subassembly of cold-stored return air passageway and freezing return air passageway deep bead of linkage control when making the air door switching has further guaranteed defrosting and refrigeration isolation, realizes the constancy of temperature of cold-stored room and freezing room.
(4) And opening the air door when the temperature of the evaporator cavity is the same as that of the fan cavity after defrosting. Such a defrosting control method further ensures a constant temperature of the refrigerating compartment and the freezing compartment.
Drawings
The invention will be described in detail below with reference to the drawings and the detailed description.
Fig. 1 is a schematic diagram of a refrigeration system of the present invention.
Fig. 2 is an exploded view of the chilled air duct assembly of the present invention.
Fig. 3 is a schematic diagram of the combined structure of fig. 2.
Fig. 4 is a schematic view of the position structure of the parallel dual evaporator of the present invention.
Fig. 5 is a schematic cross-sectional view of the open state of the return air duct of the present invention.
Figure 6 is a schematic cross-sectional view of the chilled air return duct of the present invention in a closed position.
Fig. 7 is an exploded view of the refrigerated return air duct blocking assembly of the present invention.
Fig. 8 is a schematic diagram of the combined structure of fig. 7.
Fig. 9 is a schematic cross-sectional view of the refrigeration return line of the present invention in an open condition.
Fig. 10 is a schematic cross-sectional view of the refrigeration return circuit of the present invention in a closed condition.
Fig. 11 is a schematic diagram of air-out and air-back when the double evaporator of the present invention is refrigerating (the dashed arrow in the figure indicates the air-out flow direction and the solid arrow indicates the air-back flow direction).
Fig. 12 is a schematic diagram of the air-out and return air of the single evaporator of the present invention when cooling (the dashed arrow indicates the air-out flow direction and the solid arrow indicates the return air flow direction).
Detailed Description
Example 1
A refrigerator comprises a refrigerator body, a controller and a refrigerating system, wherein a refrigerating room and a freezing room are arranged below the refrigerating room in the refrigerator body, and the refrigerating system comprises a compressor 1, a condenser 2, a drier-filter 3, a first electronic expansion valve 4, a second electronic expansion valve 5, a first evaporator 6 and a second evaporator 7 which are connected in parallel, as shown in fig. 1 and 4.
The exhaust pipe of the compressor 1 is connected with the air inlet of the condenser 2, the air outlet of the condenser 2 is connected with the inlet of the dry filter 3, two branches are connected in parallel between the outlet of the dry filter 3 and the muffler of the compressor 1, the first branch is sequentially connected with the first electronic expansion valve 4 and the first evaporator 6 in series, and the second branch is sequentially connected with the second electronic expansion valve 5 and the second evaporator 7 in series.
When two evaporators alternately defrost, an electronic expansion valve of a branch where the evaporator for defrosting is positioned is closed, and the evaporator of the other branch normally performs refrigeration cycle; when the two evaporators are used for normal refrigeration, the first electronic expansion valve 4 and the second electronic expansion valve 5 are both opened, and the two branches simultaneously perform refrigeration circulation.
Specifically, the back of freezing room is equipped with freezing wind channel subassembly, be equipped with first freezing return air passageway and second freezing return air passageway in the freezing wind channel subassembly.
As shown in fig. 2 and 3, the refrigerating air duct assembly includes a front cover plate 8, a rear cover plate 9 located at the rear side of the front cover plate 8, a fan 10 located between the front cover plate 8 and the rear cover plate 9, a refrigerating air duct foam 11 located below the rear cover plate 9, a first air door 12, a second air door 13, a first refrigerating air return passage air baffle 14 for controlling opening and closing of the first refrigerating air return passage, and a second refrigerating air return passage air baffle 15 for controlling opening and closing of the second refrigerating air return passage.
The freezing air duct foam 11 comprises a front wall 111, a top wall 112 and a middle partition wall 113, the middle partition wall 113 divides the freezing air duct foam 11 into a first evaporator chamber 61 for arranging the first evaporator 6 and a second evaporator chamber 71 for arranging the second evaporator 7, a first opening 121 controlled to open and close by a first air door 12 is arranged above the first evaporator chamber 61, and a second opening 131 controlled to open and close by a second air door 13 is arranged above the second evaporator chamber 71.
A fan chamber 101 is arranged above the first air door 12 and the second air door 13, and the fan chamber 101 is respectively communicated with the first evaporator chamber 61 and the second evaporator chamber 71 through a first opening 121 and a second opening 131.
When the refrigerator is normally cooled, the first air door 12 and the second air door 13 are in a completely opened state, the opening angle is 90 degrees, at this time, the cold energy of the first evaporator chamber 61 and the second evaporator chamber 71 can enter the fan chamber 101, and then the fan 10 provides the cold energy for the refrigerating chamber and the freezing chamber. The return air of the refrigeration compartment is fed from the bottom of the back cover plate 9 through the first and second refrigeration return air channel inlets into the bottom of the first and second evaporator chambers 61 and 71, respectively. The return air of the refrigerating compartment firstly enters the first refrigerating return air channel inlet and the second refrigerating return air channel inlet, and respectively enters the bottom of the first evaporator chamber 61 and the bottom of the second evaporator chamber 71 through the first refrigerating return air channel outlet and the second refrigerating return air channel outlet respectively. Thereby forming a good wind circulation.
As shown in fig. 2 and 3, the upper end of the first return air channel wind screen 14 and the upper end of the second return air channel wind screen 15 are connected to the back cover 9 by a plurality of wind screen extension springs 16, the first return air channel wind screen 14 is inserted into the front wall of the first evaporator chamber 61, and the second return air channel wind screen 15 is inserted into the front wall of the second evaporator chamber 71.
As shown in fig. 5, when the first or second air door is opened, the wind shield telescopic spring on the same side of the first or second air door pulls the wind shield of the corresponding freezing return air channel to open the corresponding freezing return air channel; as shown in fig. 6, when the first or second damper is closed, the return air duct windshields on the same side of the damper are pressed together to close the corresponding return air duct.
As shown in fig. 11 and 12, the back of the cabinet is attached with a first refrigerated return air duct and a second refrigerated return air duct. The fan chamber 101 is internally provided with a first refrigeration air return channel air blocking component 17 for controlling the opening and closing of the first refrigeration air return pipeline and a second refrigeration air return channel air blocking component 18 for controlling the opening and closing of the second refrigeration air return pipeline, as shown in fig. 7, the first refrigeration air return channel air blocking component 17 and the second refrigeration air return channel air blocking component 18 comprise a component base 181, two component springs 182, a component shell 183 and a component telescopic baffle 184.
As shown in fig. 7 and 8, the assembly base 181 and the assembly housing 183 are connected in a plugging manner, two sides of the assembly base 181 are respectively provided with an accommodating cavity a for accommodating the assembly spring, two sides of the assembly telescopic baffle 184 are respectively fixed with a telescopic rod 185, a free end of the telescopic rod 185 is connected with one end of the assembly spring 182, the other end of the assembly spring 182 is connected with the middle part of the accommodating cavity a, and a sliding cavity B for freely telescopic movement of the assembly telescopic baffle 184 is arranged in the assembly housing 183.
The end of the telescopic rod 185 is connected with the assembly spring 182, so that the assembly base 181, the assembly housing 183 and the assembly telescopic baffle 184 are connected into a whole, and the accommodating cavity A, the telescopic rod 185 and the assembly spring 182 which are positioned on the same side are positioned on the same horizontal axis.
Further, the component base 181 and the component housing 183 are equal in width and height. The assembly base 181 is connected with the assembly housing 183 along the length direction of the assembly base 181, the width of the assembly expansion baffle 184 is smaller than the width of the assembly housing 183, and the height of the assembly expansion baffle 184 is smaller than the height of the assembly housing 183.
The assembly retractable baffle 184 is provided with a vent 19, as shown in fig. 9, when the damper is opened, the damper contacts the compression assembly retractable baffle 184, and the vent 19 is in communication with the refrigeration return line C. As shown in fig. 10, when the damper is closed, the assembly retractable flap 184 is extended by the assembly spring 182 and the portion outside the vent 19 closes the refrigerated return duct C.
Further, temperature sensors are disposed in the first evaporator chamber 61 near the first damper 12, in the second evaporator chamber 71 near the second damper 13, and in the fan chamber 101 near the fan 10, and are connected to the controller. When defrosting of the evaporator is finished, the electronic expansion valve of the same branch with the evaporator is opened, the evaporator starts to refrigerate the evaporator chamber, and whether the air door corresponding to the upper part of the evaporator chamber is opened is related to the temperature of the evaporator chamber and the temperature of the fan chamber. When the temperature in the evaporator chamber is the same as the temperature in the fan chamber, the damper is opened. The test shows that the temperature of the evaporator chamber is recovered within 10 minutes after defrosting is finished, and the air door is opened.
Example 2
A defrosting control method applied to the refrigerator of embodiment 1. The first evaporator 6 and the second evaporator 7 alternately defrost, comprising the steps of:
s1, when the first evaporator 6 is frosted, the second evaporator 7 is used for normally refrigerating, at the moment, the first electronic expansion valve 4 is closed, and the second electronic expansion valve 5 is normally opened;
s2, the first air door 12 is gradually closed, the second air door 13 is normally opened, the component telescopic baffle of the first refrigeration return air channel air blocking component 17 is gradually stretched under the action of a component spring, and the part, except for the vent 19, of the component telescopic baffle completely closes the first refrigeration return air pipeline; meanwhile, in the closing process of the first air door 12, after the first air door 12 rotates a certain angle, the first air door 12 contacts and presses the first freezing return air channel wind screen 14, and when the first air door 12 is completely closed, the first freezing return air channel is completely closed.
And S3, after defrosting of the first evaporator 6 is finished, the first electronic expansion valve 4 is opened, the first evaporator 6 is used for normal refrigeration, and the first air door 12 is still closed.
S4, when the temperature in the first evaporator chamber 61 is the same as the temperature in the fan chamber 101, the first damper 12 is opened.
S5, when the first air door 12 is opened, the first air door 12 contacts and presses an assembly telescopic baffle of the first refrigeration return air channel air blocking opening assembly 17, the assembly telescopic baffle compresses an assembly spring while being pressed, and a vent 19 on the assembly telescopic baffle is communicated with the first refrigeration return air pipeline; at the same time, the first return air channel wind screen 14 is opened under the tension of the wind screen telescopic spring.
S6, after the first air door 12 is opened, the second evaporator 7 starts defrosting, the steps S1-S5 are repeated, and the first in the corresponding steps S1-S5 is replaced by the second. Specifically, the second electronic expansion valve 5 is closed, the second air door 13 is gradually closed, and the second refrigeration return air pipeline and the second refrigeration return air channel are also closed. When the defrosting of the second evaporator 7 is finished, the cooling is restarted, at this time, the second damper 13 is continuously closed, and when the temperature in the second evaporator chamber 71 is the same as the temperature in the fan chamber 101, the second damper 13 is opened.
The specific working principle of the invention is as follows:
TABLE 1 states of corresponding air door and return air passage under different working states of evaporator
As shown in table 1 and fig. 11, during normal cooling, the first air door 12 and the second air door 13 are fully opened, and the cold energy of the first and second evaporator chambers can enter the fan chamber 101, and at this time, the first refrigerating return line, the second refrigerating return line, the first refrigerating return line and the second refrigerating return line are all through, and the cold energy is provided to the refrigerating compartment and the refrigerating compartment through the fan 10.
As shown in fig. 12, when the first evaporator 6 starts defrosting, in the process that the first air door 12 is gradually closed, the first refrigeration return air channel air blocking component 17 is gradually elongated, and the first refrigeration return air pipeline is first closed under the cooperation of the first refrigeration return air channel air blocking component 17. The first damper 12 then contacts the first return air channel damper 14, and under the pressure of the first damper 12, the damper extension spring is forced to extend, and the first return air channel is gradually closed, so that the first evaporator chamber 61 is fully closed.
At this time, the cooling capacity of the second evaporator chamber 71 may enter the blower chamber 101, and then be supplied to the freezing compartment and the refrigerating compartment through the blower 10.
The return air of the refrigerating compartment firstly enters the inlet of the second refrigerating return air channel, then passes through the second refrigerating return air pipeline, and only passes through the second refrigerating return air channel air blocking component when returning air because the first refrigerating return air channel air blocking component is closed, and returns to the bottom of the second evaporator chamber.
The return air for the freezer compartment is from the bottom of the back plate 9 through the second return air passage inlet and into the bottom of the second evaporator chamber 71. Whereby the second evaporator 7 can normally cool also when the first evaporator 6 is frosted.
When the first evaporator 6 finishes defrosting, cooling is restarted. At this point the first damper 12 will continue to close for a period of time and when the temperature in the first evaporator chamber 61 returns to the same temperature as the fan chamber 101, the first damper 12 opens. After the first damper 12 is opened, the second evaporator chamber 71 starts defrosting, and the above steps are repeated.
The parts not described in the invention can be realized by adopting or referring to the prior art. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (6)
1. The refrigerator comprises a refrigerator body, a controller and a refrigerating system, wherein a refrigerating compartment and a freezing compartment are arranged in the refrigerator body, the refrigerating compartment is arranged below the refrigerating compartment, and the refrigerating system comprises a compressor, a condenser, a first evaporator and a second evaporator which are connected in parallel;
the exhaust pipe of the compressor is connected with the air inlet of the condenser, the air outlet of the condenser is connected with the inlet of the dry filter, two branches are connected in parallel between the outlet of the dry filter and the air return pipe of the compressor, the first branch is sequentially connected with a first electronic expansion valve and a first evaporator in series, and the second branch is sequentially connected with a second electronic expansion valve and a second evaporator in series;
when two evaporators alternately defrost, an electronic expansion valve of a branch where the evaporator for defrosting is positioned is closed, and the evaporator of the other branch normally performs refrigeration cycle;
when the two evaporators are used for normal refrigeration, the first electronic expansion valve and the second electronic expansion valve are both opened, and the two branches are used for refrigeration circulation at the same time;
the back of the freezing compartment is provided with a freezing air duct assembly, and a first freezing return air channel and a second freezing return air channel are arranged in the freezing air duct assembly;
the refrigerating air duct assembly comprises a front cover plate, a rear cover plate positioned at the rear side of the front cover plate, a fan positioned between the front cover plate and the rear cover plate, refrigerating air duct foam positioned below the rear cover plate, a first air door, a second air door, a first refrigerating air return channel wind shield for controlling the opening and the closing of the first refrigerating air return channel and a second refrigerating air return channel wind shield for controlling the opening and the closing of the second refrigerating air return channel;
the freezing air duct foam comprises a front wall, a top wall and a middle partition wall, wherein the middle partition wall divides the freezing air duct foam into a first evaporator chamber for arranging a first evaporator and a second evaporator chamber for arranging a second evaporator, a first opening controlled to open and close by a first air door is arranged above the first evaporator chamber, and a second opening controlled to open and close by a second air door is arranged above the second evaporator chamber;
a fan chamber is arranged above the first air door and the second air door, and the fan chamber is respectively communicated with the first evaporator chamber and the second evaporator chamber through a first opening and a second opening;
the upper end part of the first freezing return air channel wind shield and the upper end part of the second freezing return air channel wind shield are connected with the freezing air channel rear cover plate through a plurality of wind shield telescopic springs, the first freezing return air channel wind shield is inserted into the front wall of the first evaporator chamber, and the second freezing return air channel wind shield is inserted into the front wall of the second evaporator chamber;
when the air door is opened, the wind shield telescopic springs on the same side of the air door pull the wind shields of the corresponding freezing return air channels, and the corresponding freezing return air channels are opened;
when the air door is closed, the air shields of the freezing air return channels on the same side of the air door are pressed together, and the corresponding freezing air return channels are closed.
2. The refrigerator according to claim 1, wherein a first refrigeration return air pipeline and a second refrigeration return air pipeline are arranged at the back of the refrigerator body, a first refrigeration return air channel air blocking component for controlling the opening and closing of the first refrigeration return air pipeline and a second refrigeration return air channel air blocking component for controlling the opening and closing of the second refrigeration return air pipeline are arranged in the fan cavity, and the first refrigeration return air channel air blocking component and the second refrigeration return air channel air blocking component comprise a component base, two component springs, a component shell and a component telescopic baffle;
the assembly base is connected with the assembly shell in an inserting mode, two sides of the assembly base are respectively provided with an accommodating cavity for accommodating an assembly spring, two sides of the assembly telescopic baffle are respectively fixed with a telescopic rod, the free end of each telescopic rod is connected with one end of each assembly spring, the other end of each assembly spring is connected with the middle of each accommodating cavity, and a sliding cavity for enabling the assembly telescopic baffle to freely move in a telescopic mode is formed in the assembly shell;
through the tip and the subassembly spring coupling of telescopic link, subassembly base, subassembly shell and the flexible baffle of subassembly are connected into an organic wholely, lie in accommodation chamber, telescopic link and the subassembly spring of homonymy this moment and be in same horizontal axis.
3. The refrigerator of claim 2, wherein the component base and the component housing are equal in width and height, the component base and the component housing are connected in a length direction of the component base, a width of the component telescopic baffle is smaller than a width of the component housing, and a height of the component telescopic baffle is smaller than a height of the component housing.
4. A refrigerator according to claim 3, wherein the assembly retractable baffle is provided with a vent, when the vent is opened, the vent contacts and presses the assembly retractable baffle, the vent is communicated with the refrigeration return air pipeline, when the vent is closed, the assembly retractable baffle stretches under the action of the assembly spring, and the portion outside the vent seals the refrigeration return air pipeline.
5. The refrigerator of claim 4, wherein temperature sensors are disposed in the first evaporator chamber near the first air door, in the second evaporator chamber near the second air door, and in the fan chamber near the fan, and the temperature sensors are connected to the controller.
6. A defrosting control method applied to the refrigerator of claim 5, wherein the first evaporator and the second evaporator alternately defrost, comprising the steps of:
s1, when the first evaporator is frosted, the second evaporator is used for normally refrigerating, at the moment, the first electronic expansion valve is closed, and the second electronic expansion valve is normally opened;
s2, the first air door is gradually closed, the second air door is normally opened, the component telescopic baffle of the first refrigeration return air channel air blocking component is gradually stretched under the action of the component spring, and the part, except the vent, of the component telescopic baffle completely closes the first refrigeration return air pipeline; meanwhile, in the closing process of the first air door, after the first air door rotates for a certain angle, the first air door contacts and extrudes the wind shield of the first freezing return air channel, and when the first air door is completely closed, the first freezing return air channel is completely closed;
s3, after defrosting of the first evaporator is finished, the first electronic expansion valve is opened, the first evaporator is used for normally refrigerating, and the first air door is still closed;
s4, when the temperature in the first evaporator cavity is the same as the temperature in the fan cavity, the first air door is opened;
s5, when the first air door is opened, the first air door contacts and presses the component telescopic baffle of the air inlet blocking component of the first refrigeration return air channel, the component telescopic baffle compresses the component spring while being pressed, and the ventilation opening on the component telescopic baffle is communicated with the first refrigeration return air pipeline; meanwhile, the first freezing return air channel wind shield is opened under the tensile force of the wind shield telescopic spring;
s6, after the first air door is opened, defrosting of the second evaporator is started, the steps S1-S5 are repeated, and the first in the corresponding steps S1-S5 is replaced by the second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211040062.6A CN115406152B (en) | 2022-08-29 | 2022-08-29 | Refrigerator and defrosting control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211040062.6A CN115406152B (en) | 2022-08-29 | 2022-08-29 | Refrigerator and defrosting control method |
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| CN115406152A CN115406152A (en) | 2022-11-29 |
| CN115406152B true CN115406152B (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534755A (en) * | 2014-12-02 | 2015-04-22 | 青岛澳柯玛超低温冷冻设备有限公司 | Refrigerating system with automatic defrosting function |
| CN205192047U (en) * | 2015-11-11 | 2016-04-27 | 青岛海尔特种电冰箱有限公司 | Double evaporation ware refrigerator |
| CN105865130A (en) * | 2016-04-27 | 2016-08-17 | 青岛海尔股份有限公司 | Constant-temperature refrigerator and control method thereof |
| CN112484368A (en) * | 2019-09-12 | 2021-03-12 | 博西华电器（江苏）有限公司 | Refrigerator and method for refrigerator |
| CN215638234U (en) * | 2021-07-30 | 2022-01-25 | 青岛海尔智能技术研发有限公司 | Refrigerating and freezing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200087041A (en) * | 2019-01-10 | 2020-07-20 | 엘지전자 주식회사 | Refrigerator |
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2022
- 2022-08-29 CN CN202211040062.6A patent/CN115406152B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534755A (en) * | 2014-12-02 | 2015-04-22 | 青岛澳柯玛超低温冷冻设备有限公司 | Refrigerating system with automatic defrosting function |
| CN205192047U (en) * | 2015-11-11 | 2016-04-27 | 青岛海尔特种电冰箱有限公司 | Double evaporation ware refrigerator |
| CN105865130A (en) * | 2016-04-27 | 2016-08-17 | 青岛海尔股份有限公司 | Constant-temperature refrigerator and control method thereof |
| CN112484368A (en) * | 2019-09-12 | 2021-03-12 | 博西华电器（江苏）有限公司 | Refrigerator and method for refrigerator |
| CN215638234U (en) * | 2021-07-30 | 2022-01-25 | 青岛海尔智能技术研发有限公司 | Refrigerating and freezing device |
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| Publication number | Publication date |
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| CN115406152A (en) | 2022-11-29 |
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