CN113970213A - Refrigerator defrosting method and refrigerator - Google Patents

Refrigerator defrosting method and refrigerator Download PDF

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Publication number
CN113970213A
CN113970213A CN202010709717.9A CN202010709717A CN113970213A CN 113970213 A CN113970213 A CN 113970213A CN 202010709717 A CN202010709717 A CN 202010709717A CN 113970213 A CN113970213 A CN 113970213A
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Prior art keywords
freezing
refrigerating
defrosting
refrigeration
chamber
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CN202010709717.9A
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CN113970213B (en
Inventor
彭洪祥
孙彬
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Hisense Shandong Refrigerator Co Ltd
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Hisense Shandong Refrigerator Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02Defrosting cycles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002Defroster control
    • F25D21/004Control mechanisms
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06Removing frost
    • F25D21/08Removing frost by electric heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00Arrangement or mounting of control or safety devices
    • F25D29/003Arrangement or mounting of control or safety devices for movable devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00Arrangement or mounting of control or safety devices
    • F25D29/005Mounting of control devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2600/00Control issues
    • F25D2600/06Controlling according to a predetermined profile

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Defrosting Systems (AREA)

Abstract

The invention provides a defrosting method of a refrigerator, wherein the refrigerator comprises a compressor, a condenser, an electromagnetic valve, a refrigerating capillary tube and a refrigerating evaporator which are sequentially connected in series to form a loop, two ends of the refrigerating capillary tube are connected in parallel with a freezing branch, and the freezing branch comprises a freezing capillary tube and a freezing evaporator which are connected in series; the defrosting method comprises the following steps: one of the freezing evaporator and the refrigerating evaporator is firstly subjected to defrosting independently and then is subjected to preferential refrigeration on the corresponding chamber, and then the other evaporator is subjected to defrosting independently and is sequentially subjected to preferential refrigeration on the corresponding chamber; in the invention, defrosting of the freezing chamber and the refrigerating chamber is carried out at different times, and after defrosting of the freezing chamber or defrosting of the refrigerating chamber is finished, the corresponding chamber is preferentially refrigerated so as to rapidly cool the corresponding chamber; thereby reducing the temperature rise of the refrigerating chamber and the freezing chamber before and after defrosting.

Description

Refrigerator defrosting method and refrigerator
Technical Field
The invention belongs to the technical field of household refrigerators, and particularly relates to a refrigerator defrosting method and a refrigerator.
Background
At present, a multi-system refrigerator is provided with a refrigeration system consisting of a plurality of evaporators and a plurality of groups of throttling capillaries, and the capillaries are switched through electromagnetic valves or electric valves to refrigerate different evaporators respectively. A plurality of evaporators of a multi-system frost-free refrigerator need defrosting, a refrigeration evaporator generally adopts blowing defrosting or blowing defrosting and auxiliary heating defrosting, and a freezing evaporator generally adopts electric heating defrosting.
According to the GB/T8059 standard, during a storage temperature test, the temperature rise of a freezing chamber is required to be not more than 3K, for example, the temperature of the freezing chamber in stable operation is-19 ℃, and the highest temperature of the freezing chamber in a defrosting and recovery period is not more than-16 ℃;
the defrosting period of the freezing chamber is 96h at the longest and 12h at the shortest according to the GB/T8059 standard; the refrigerating chamber has more water, and simultaneously has lower defrosting power or only adopts blowing for defrosting, so that the defrosting period is generally shorter in order to avoid defrosting completely; blowing is adopted in the cold storage chamber for defrosting, the defrosting time is generally about 80-100min, and the defrosting time is generally shorter for defrosting by heating and defrosting for freezing, about 30 min;
the defrosting periods and defrosting times of the refrigerating chamber and the freezing chamber are different, and influence occurs mutually: because the evaporators of the system adopting series-parallel connection are mutually associated and not completely independent, the interaction needs to be considered: when the downstream evaporator in the flowing direction of the refrigerant defrosts, the upstream evaporator can not normally refrigerate, and when the upstream evaporator in the flowing direction of the refrigerant defrosts, the downstream evaporator can normally refrigerate. At present, a freezing chamber and a refrigerating chamber are adopted to defrost synchronously, and the method specifically comprises the following steps: after the defrosting condition of the freezing evaporator is achieved, firstly refrigerating and precooling to stop, then freezing and precooling to stop or lower, then entering freezing and refrigerating synchronous defrosting, starting the press with a delay of 5-10min after the defrosting of the freezing evaporator is finished, refrigerating for 30min independently, and then entering a freezing and refrigerating temperature control program (refrigerating for priority); in the defrosting process, on one hand, due to the defrosting time and the forced refrigerating time requirement of refrigeration after defrosting, the refrigerating temperature rise is large because the refrigeration cannot be carried out; on the other hand, the temperature rise of the freezing chamber is large in the defrosting process, after the defrosting of the freezing evaporator is finished and the forced freezing refrigeration is finished, the freezing chamber cannot continue to refrigerate due to the fact that the temperature of the refrigerating chamber is high and the refrigerating chamber has high refrigeration priority, and the freezing refrigeration can be carried out only after the refrigerating refrigeration is finished, so that the temperature rise of the freezing chamber is large; that is, the temperature of the freezing chamber and the refrigerating chamber is high after the defrosting is carried out simultaneously, and the refrigeration is needed, and the temperature of the other chamber is increased no matter refrigeration or freezing refrigeration is given priority.
The invention is provided in view of the above.
Disclosure of Invention
The invention provides a refrigerator defrosting method aiming at the technical problems.
In order to achieve the purpose, the invention adopts the technical scheme that:
the defrosting method of the refrigerator comprises a compressor, a condenser, an electromagnetic valve, a refrigerating capillary tube and a refrigerating evaporator which are sequentially connected in series to form a loop, wherein two ends of the refrigerating capillary tube are connected in parallel with a freezing branch, and the freezing branch comprises a freezing capillary tube and a refrigerating evaporator which are connected in series; the defrosting method comprises the following steps:
one of the freezing evaporator and the refrigerating evaporator is firstly subjected to defrosting independently and then is subjected to preferential refrigeration for the corresponding chamber, and then the other evaporator is subjected to defrosting independently and is sequentially subjected to preferential refrigeration for the corresponding chamber.
Preferably, the refrigerator defrosting method comprises the following steps: pre-cooling in a freezing chamber and pre-cooling in a refrigerating chamber; after the pre-cooling of the freezing chamber is finished, the defrosting of the freezing evaporator is independently carried out, and then the freezing preferential cooling is carried out; and then, pre-cooling the refrigerating chamber, and after the pre-cooling of the refrigerating chamber is finished, independently defrosting the refrigerating evaporator and sequentially refrigerating for preferential refrigeration.
Preferably, the refrigerator defrosting method comprises the following steps: pre-cooling in a refrigerating chamber and pre-cooling in a freezing chamber; after the pre-cooling of the refrigerating chamber is finished, the refrigerating evaporator is independently defrosted and then refrigerating priority refrigeration is carried out, after the refrigerating priority refrigeration is finished, the refrigerating chamber is pre-cooled firstly, then the refrigerating evaporator is independently defrosted and freezing priority refrigeration is carried out successively.
Preferably, the refrigerating compartment precooling comprises:
the electromagnetic valve is switched to the cold storage side, and the compressor works;
monitoring the freezing Pre-Cooling temperature TC1And the refrigerated precooling temperature T is setC1With a preset refrigerated pre-cooling temperature threshold value TC0Comparing;
when T isC1≤TC0And when the pre-cooling of the cold storage chamber is finished.
Preferably, the freezing compartment pre-cooling comprises:
the electromagnetic valve is switched to the freezing side, and the compressor works;
monitoring the freezing Pre-Cooling temperature TD1And the freezing precooling temperature T is setD1With a preset freezing precooling temperature threshold value TD0Comparing;
when T isD1≤TD0And (3) precooling the freezing chamber.
Preferably, the defrosting of the freezing evaporator comprises closing an electromagnetic valve, and working a freezing heating wire until the defrosting of the freezing evaporator is finished; and the defrosting of the refrigeration evaporator comprises the closing of an electromagnetic valve, and the working of a refrigeration heating wire and/or a refrigeration fan is completed when the defrosting of the refrigeration evaporator is finished.
Preferably, the freezing priority refrigeration comprises the following steps:
the electromagnetic valve is switched to the freezing side, the compressor works, and the freezing fan works;
monitoring priority freeze duration td1And the preferential freezing time period td1And a preset priority freezing time threshold value td0Comparing;
when t isd1≥td0When the cooling is completed, the freezing priority cooling is completed.
Preferably, the freezing priority refrigeration is specifically as follows: and operating the original control program of the freezing chamber until the temperature of the freezing chamber reaches the shutdown temperature.
Preferably, the refrigeration priority cooling includes:
the electromagnetic valve is switched to the refrigerating side, the compressor works, and the refrigerating fan works;
monitoring a priority refrigeration time period tc1And the priority refrigeration time length t is setc1And a preset priority refrigeration time threshold value tc0Comparing;
when t isc1≥tc0And when the refrigeration is finished, the refrigeration priority refrigeration is finished.
A refrigerator is used for realizing the refrigerator defrosting method.
Compared with the prior art, the invention has the advantages and positive effects that:
the refrigerator comprises a compressor, a condenser, an electromagnetic valve, a refrigerating capillary tube and a refrigerating evaporator which are sequentially connected in series to form a loop, wherein two ends of the refrigerating capillary tube are connected with a freezing branch in parallel, and the freezing branch comprises a freezing capillary tube and a refrigerating evaporator which are connected in series; the defrosting method comprises the following steps: one of the freezing evaporator and the refrigerating evaporator is firstly subjected to defrosting independently and then is subjected to preferential refrigeration on the corresponding chamber, and then the other evaporator is subjected to defrosting independently and is sequentially subjected to preferential refrigeration on the corresponding chamber; in the invention, defrosting of the freezing chamber and the refrigerating chamber is carried out at different times, and after defrosting of the freezing chamber or defrosting of the refrigerating chamber is finished, the corresponding chamber is preferentially refrigerated so as to rapidly cool the corresponding chamber; thereby reducing the temperature rise of the refrigerating chamber and the freezing chamber before and after defrosting.
Drawings
FIG. 1 is a schematic structural view of a refrigerator system according to the present invention;
FIG. 2 is a schematic block diagram of a refrigerator defrosting system according to the present invention;
FIG. 3 is a flowchart illustrating an overall control process of a first embodiment of a defrosting method for a refrigerator according to the present invention;
FIG. 4 is a control flowchart illustrating a first embodiment of a defrosting method for a refrigerator according to the present invention;
FIG. 5 is a flowchart illustrating an overall control of a second embodiment of a defrosting method for a refrigerator according to the present invention;
fig. 6 is a specific control flowchart of a second embodiment of the refrigerator defrosting method according to the present invention.
In the above figures: a compressor 1; a condenser 2; a solenoid valve 3; a cryocapillary 9; refrigerating the capillary tube 8; a freezing evaporator 5; a refrigerating evaporator 4; a freezing fan 7; a refrigerating fan 6; a control system 10; a setting module 20; a temperature acquisition module 40; a timing module 30; a judging module 50; a control module 60.
Detailed Description
The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the scope of the present invention as claimed is not limited to the scope described in the specific embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
It should be noted that the description relating to "first", "second", etc. in the present invention is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Example one
A refrigerator includes a refrigerating compartment and a freezing compartment; the refrigerator is provided with a refrigerator defrosting system; as shown in fig. 1, the refrigerating system of the dual system refrigerator includes a compressor 1, a condenser 2 communicated with an outlet of the compressor 1, an electromagnetic valve 3 for switching an operating state of the refrigerating system, a freezing capillary tube 9 and a refrigerating capillary tube 8, a freezing evaporator 5 and a refrigerating evaporator 4 for respectively providing cooling capacity to the freezing compartment and the refrigerating compartment, a freezing fan 7 and a refrigerating fan 6 for respectively diffusing the cooling capacity generated by the freezing evaporator 5 and the refrigerating evaporator 4 into the freezing compartment and the refrigerating compartment, and a freezing heating wire and a refrigerating heating wire for respectively defrosting the freezing evaporator 5 and the refrigerating evaporator 4. Wherein, compressor 1, condenser 2, solenoid valve 3, cold-stored capillary 8 and cold-stored evaporimeter 4 establish ties in proper order and form the return circuit, and the both ends of cold-stored capillary 8 are parallelly connected to have freezing branch road, and freezing branch road is including freezing capillary 9 and the freezing evaporimeter 5 of establishing ties.
As shown in fig. 2, the refrigerator is provided with a control system 10 for controlling the operation states of various components of the refrigerator to control the refrigerator. The control system 10 includes a setting module 20, a temperature collecting module 40, a timing module 30, a determining module 50, and a control module 60.
The setting module 20 is configured to obtain various standard parameters of the refrigerator operation, where the standard parameters include, but are not limited to, a temperature parameter, a time parameter, and the like. In this embodiment, the setting module 20 obtains the freezing and precooling temperature threshold T during defrostingD0And a cold storage precooling temperature threshold value TC0Priority freezing time threshold td0And a threshold value t of refrigeration timec0(ii) a Wherein the freezing precooling temperature threshold value TD0It cannot be below the set minimum temperature point for a freeze shutdown to ensure that freezing is avoided while lowering the temperature. Likewise, a refrigerated pre-cooling temperature threshold TC0And can not be lower than the set minimum temperature point of the refrigeration shutdown so as to ensure that the temperature is reduced and the icing is avoided. The setting module 20 is also used for acquiring an original control program of the refrigerator, which includes a control program of the refrigerating chamber and a control program of the freezing chamber; namely, whether the refrigerating chamber of the refrigerator refrigerates or the refrigerating chamber and the freezing chamber of the refrigerator refrigerate is judged according to the real-time temperature in the refrigerating chamber and the freezing chamber.
The temperature acquisition module 40 is used for acquiring the freezing and precooling temperature T during precooling of the freezing chamber in real timeD1And the cold storage pre-cooling temperature T during the pre-cooling of the cold storage chamberC1. Specifically, the temperature acquisition module 40 may include a freezing sensor disposed in the freezing compartment and a refrigerating sensor disposed in the refrigerating compartment, the freezing sensor being configured to sense and obtain the freezing pre-cooling temperature TD1A refrigeration sensor for sensing and obtaining a refrigeration pre-cooling temperature TC1
Of course, in other embodiments, the freezing sensor and the refrigerating sensor are both provided in plurality, and the temperature acquisition module 40 further includes a data processing unit for receiving the temperature values of the freezing chamber sensed by the freezing sensors respectivelyAnd processing a plurality of the temperature values according to preset logic to obtain a freezing precooling temperature TD1(ii) a The data processing unit is also used for receiving the temperature values of the refrigerating chambers respectively sensed by the refrigerating sensors and processing the temperature values according to preset logic to obtain a refrigerating precooling temperature TC1
The timing module 30 is used to record time, and may be specifically configured as a timer. In this embodiment, the timing module 30 performs the defrosting process on the refrigeration evaporator for the preferential refrigeration time td1And the preferential refrigerating time t after the end of the refrigeration defrostingc1And (6) timing.
The determining module 50 is used for receiving the freezing precooling temperature T collected by the temperature collecting module 40D1And a cold storage precooling temperature TC1And judging the freezing precooling temperature TD1And a refrigeration pre-cooling temperature TC1Respectively corresponding freezing precooling temperature threshold values TD0And a cold storage precooling temperature threshold value TC0The magnitude relationship of (1). In addition, the determining module 50 is used for receiving the priority freezing time t collected by the timing module 30d1And a preferred refrigeration duration tc1And judging the preferential freezing time period td1And a preferred refrigeration duration tc1Priority freezing time threshold t respectively corresponding to the twod0And a threshold value t of refrigeration timec0The magnitude relationship of (1).
The control module 60 is connected to the setting module 20, the temperature acquisition module 40, the timing module 30 and the judgment module 50, performs information interaction with the setting module 20, the temperature acquisition module 40, the timing module 30 and the judgment module 50, and controls the on/off states of the refrigeration system, the freezing fan 7, the refrigerating fan 6, the freezing heating wire, the refrigerating heating wire and the like.
Specifically, as shown in fig. 3 to 4, the defrosting method for the refrigerator includes independently defrosting the freezing evaporator, performing refrigeration preferentially after defrosting of the freezing evaporator is finished, independently performing defrosting of the refrigerating evaporator, and performing refrigeration preferentially after defrosting of the refrigerating evaporator is finished. The method comprises the following specific steps:
s1: determining that the defrosting condition of the refrigeration evaporator is met;
wherein the defrosting condition of the refrigeration evaporator can be that the accumulated running time of the refrigeration evaporator 5 reaches a preset threshold value; it is not particularly limited and may be set according to actual needs.
S2: pre-cooling in a freezing chamber; the method specifically comprises the following steps:
s21: the electromagnetic valve 3 is switched to the freezing side, and the compressor 1 works;
s22: freezing sensor for monitoring freezing precooling temperature TD1And will freeze the precooling temperature TD1With a preset freezing precooling temperature threshold value TD0Comparing;
s23: judgment of TD1≤TD0Is there a If yes, go to step S3; if not, go to step S22;
s3: independently defrosting the refrigeration evaporator; the method comprises the following steps: closing the electromagnetic valve 3, and working the freezing heating wire until the defrosting of the freezing evaporator is finished;
in step S3, the refrigerating compartment is cooled normally, and the temperature of the refrigerating compartment is effectively ensured.
S4: freezing and preferentially refrigerating; the method specifically comprises the following steps:
s41: the timer starts to time;
s42: the electromagnetic valve 3 is switched to the freezing side, the compressor 1 works, and the freezing fan 7 works;
s43: time period t of preferential freezingd1Not less than the threshold t of the preferential freezing timed0Is there a If yes, go to step S44; if not, go to step S42;
s44: resetting the timer;
in this embodiment, the priority freezing time threshold td0Setting for 30-45 min.
As another practicable manner, the step S4 freezing priority cooling may be set as: and operating the original control program of the freezing chamber until the temperature of the freezing chamber reaches the shutdown temperature.
In the above step, when the single freezing evaporator of S3 defrosts, the freezing chamber of S2 is pre-cooled to reduce the initial temperature of the freezing chamber when the refrigerator defrosts; after S3 is finished, step S4 refrigeration priority refrigeration is executed, the temperature rise in the refrigeration chamber after the refrigeration evaporator defrosts can be effectively controlled, and the temperature rise in the refrigeration chamber before and after defrosting is avoided to exceed 3K; the arrangement of the steps can ensure that the temperature change before and after defrosting is small, and effectively reduce the influence of the defrosting process on the temperature in the freezing chamber, thereby ensuring the fresh-keeping effect of the freezing chamber.
S5: pre-cooling in a cold storage chamber; the method comprises the following steps:
s51: the electromagnetic valve 3 is switched to the cold storage side, and the compressor 1 works;
s52: refrigeration sensor monitoring freezing precooling temperature TC1And will refrigerate the precooling temperature TC1With a preset refrigerated pre-cooling temperature threshold value TC0Comparing;
s53: judgment of TC1≤TC0Is there a If yes, go to step S6; if not, go to step S52;
s6: defrosting of the refrigeration evaporator is independently carried out; the method comprises the following steps: closing the electromagnetic valve 3, and working the refrigerating heating wire and/or the refrigerating fan until defrosting of the refrigerating evaporator is finished;
in step S6, the freezer compartment cannot be cooled; however, since the freezer compartment is cooled preferentially in step S4 before S6, the temperature of the freezer compartment can be kept in a low range during step S6. S7: refrigerating preferentially; the method specifically comprises the following steps:
s71: the timer starts to time;
s72: the electromagnetic valve 3 is switched to the refrigerating side, the compressor 1 works, and the refrigerating fan 6 works;
s73: priority refrigeration time period tc1Not less than the threshold t of preferential refrigeration timec0Is there a If yes, go to step S74; if not, go to step S72;
s74: resetting the timer;
in the above manner, after S6 is completed, step S7 of refrigerating priority cooling is performed, so that the temperature rise in the refrigerating chamber after the defrosting of the refrigerating evaporator can be effectively controlled, and the temperature rise in the refrigerating chamber before and after the defrosting of the refrigerating chamber can be avoided; the arrangement of the steps can ensure that the temperature change before and after defrosting is small, and effectively reduces the influence of the defrosting process on the temperature in the refrigerating chamber, thereby ensuring the fresh-keeping effect of the refrigerating chamber.
In step S4, the refrigeration evaporator is defrosted and then the refrigeration-priority cooling is performed. And after the step S4, the step S6 is executed to defrost the refrigeration evaporator independently, so as to avoid the mutual influence between the defrosting of the refrigeration evaporator and the defrosting of the refrigeration evaporator.
S8: the original control program for the refrigerant system is run.
In this embodiment, the freezing chamber defrosting is performed separately, and then the refrigerating chamber defrosting is performed separately, that is, the freezing chamber and the refrigerating chamber defrosting are performed at different times. Precooling the corresponding chamber before defrosting by the freezing evaporator or the refrigerating evaporator so as to reduce the initial temperature of defrosting of the corresponding chamber; after defrosting of the freezing chamber or the refrigerating chamber is finished, the corresponding chamber is preferentially refrigerated so as to quickly cool the corresponding chamber; thereby reducing the temperature rise of the refrigerating chamber and the freezing chamber before and after defrosting.
Compared with the staggered defrosting method in the invention, the temperature rise of the refrigerating chamber and the freezing chamber before and after defrosting in different methods is changed as follows:
Figure BDA0002596089910000091
the comparison of the data in the table shows that the defrosting method of the invention effectively reduces the temperature rise of the refrigerating chamber and the freezing chamber before and after defrosting.
Example two
The second embodiment has the same principle as the first embodiment, and the main difference from the first embodiment is that the defrosting method of the refrigerator is different. Specifically, as shown in fig. 5 to 6, the defrosting method for the refrigerator in the embodiment includes independently defrosting the refrigeration evaporator, cooling the refrigeration evaporator preferentially after defrosting of the refrigeration evaporator is finished, independently defrosting the freezing evaporator, and cooling the freezing evaporator preferentially after defrosting of the freezing evaporator is finished. The method comprises the following specific steps:
s' 1: determining that the defrosting condition is met;
wherein the defrosting condition may be that the accumulated running time of the refrigeration evaporator 4 reaches a predetermined threshold; it is not particularly limited and may be set according to actual needs.
S' 2: pre-cooling in a cold storage chamber; the method comprises the following steps:
s' 21: the electromagnetic valve 3 is switched to the cold storage side, and the compressor 1 works;
s' 22: refrigeration sensor monitoring freezing precooling temperature TC1And will refrigerate the precooling temperature TC1With a preset refrigerated pre-cooling temperature threshold value TC0Comparing;
s' 23: judgment of TC1≤TC0Is there a If yes, executing step S' 3; if not, executing the step S' 22;
s' 3: defrosting of the refrigeration evaporator is independently carried out; the method comprises the following steps: closing the electromagnetic valve 3, and working the refrigerating heating wire and/or the refrigerating fan until defrosting of the refrigerating evaporator is finished;
in this step S' 3, the freezing compartment cannot be cooled.
S' 4: refrigerating preferentially; the method specifically comprises the following steps:
s' 41: the timer starts to time;
s' 42: the electromagnetic valve 3 is switched to the refrigerating side, the compressor 1 works, and the refrigerating fan 6 works;
s' 43: priority refrigeration time period tc1Not less than the threshold t of preferential refrigeration timec0Is there a If yes, executing step S' 44; if not, executing the step S' 42;
s' 44: resetting the timer;
in the above step, before defrosting of the refrigerating evaporator is finished by the S '3, precooling is carried out in the refrigerating chamber of the S' 2 so as to reduce the initial temperature of the refrigerating chamber during defrosting of the refrigerator; after S '3 is finished, the step S' 4 of refrigeration priority refrigeration is executed, so that the temperature rise in the refrigerating chamber after the defrosting of the refrigerating evaporator can be effectively controlled, and the large temperature rise of the refrigerating chamber before and after defrosting is avoided; the arrangement of the steps can ensure that the temperature change before and after defrosting is small, and effectively reduces the influence of the defrosting process on the temperature in the refrigerating chamber, thereby ensuring the fresh-keeping effect of the refrigerating chamber.
S' 5: pre-cooling in a freezing chamber; the method comprises the following steps:
s' 51: the electromagnetic valve 3 is switched to the freezing side, and the compressor 1 works;
s' 52: freeze sensor monitoring coldFreezing and precooling temperature TD1And will freeze the precooling temperature TD1With a preset freezing precooling temperature threshold value TD0Comparing;
s' 53: judgment of TD1≤TD0Is there a If yes, executing step S' 6; if not, executing the step S' 52;
s' 6: independently defrosting the refrigeration evaporator; the method comprises the following steps: closing the electromagnetic valve 3, and working the freezing heating wire until the defrosting of the freezing evaporator is finished;
in step S' 6, the refrigerating compartment is normally cooled, and the temperature of the refrigerating compartment is effectively ensured.
S' 7: freezing and preferentially refrigerating; the method specifically comprises the following steps:
s' 71: the timer starts to time;
s' 72: the electromagnetic valve 3 is switched to the freezing side, the compressor 1 works, and the freezing fan 7 works;
s' 73: time period t of preferential freezingd1Not less than the threshold t of the preferential freezing timed0Is there a If yes, executing step S' 74; if not, executing the step S' 72;
s' 74: resetting the timer;
in this embodiment, the priority freezing time threshold td0Setting for 30-45 min.
As another practicable manner, the step S7 freezing priority cooling may be set as: and operating the original control program of the freezing chamber until the temperature of the freezing chamber reaches the shutdown temperature.
In the above step, the pre-cooling of the S '5 freezing chamber is carried out before the defrosting of the S' 6 single freezing evaporator is carried out so as to reduce the initial temperature of the freezing chamber during the defrosting of the refrigerator; after S '6 is finished, the step S' 7 is executed for refrigeration priority, so that the temperature rise in the refrigerating chamber after the defrosting of the refrigerating evaporator can be effectively controlled, and the temperature rise in the refrigerating chamber before and after the defrosting is avoided to exceed 3K; the arrangement of the steps can ensure that the temperature change before and after defrosting is small, and effectively reduce the influence of the defrosting process on the temperature in the freezing chamber, thereby ensuring the fresh-keeping effect of the freezing chamber.
S' 8: the original control program for the refrigerant system is run.
In this embodiment, the refrigerating chamber defrosting is performed separately, and then the freezing chamber defrosting is performed separately, that is, the refrigerating chamber and the freezing chamber defrosting are performed at different times. Precooling the corresponding chamber before defrosting by the freezing evaporator or the refrigerating evaporator so as to reduce the initial defrosting temperature; after defrosting of the freezing chamber or the refrigerating chamber is finished, the corresponding chamber is preferentially refrigerated so as to quickly cool the corresponding chamber; thereby reducing the temperature rise of the refrigerating chamber and the freezing chamber before and after defrosting.
In the invention, defrosting of one of a refrigeration evaporator and a freezing evaporator is independently carried out, and then preferential refrigeration is carried out on a corresponding chamber; then, independently defrosting the other evaporator, and preferentially refrigerating the corresponding chamber after defrosting; namely, the refrigerating chamber and the freezing chamber are defrosted at different times. In addition, the corresponding compartments are pre-cooled before the respective defrosting of the refrigeration evaporator or the freezing evaporator, so that the initial defrosting temperature is reduced; after the defrosting of the freezing chamber or the refrigerating chamber is finished, the corresponding chamber is preferentially refrigerated so as to quickly cool the corresponding chamber; thereby reducing the temperature rise of the refrigerating chamber and the freezing chamber before and after defrosting.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims (10)

1. The defrosting method of the refrigerator is characterized in that:
the refrigerator comprises a compressor, a condenser, an electromagnetic valve, a refrigerating capillary tube and a refrigerating evaporator which are sequentially connected in series to form a loop, wherein two ends of the refrigerating capillary tube are connected with a freezing branch in parallel, and the freezing branch comprises a freezing capillary tube and a refrigerating evaporator which are connected in series; the defrosting method comprises the following steps:
one of the freezing evaporator and the refrigerating evaporator is firstly subjected to defrosting independently and then is subjected to preferential refrigeration for the corresponding chamber, and then the other evaporator is subjected to defrosting independently and is sequentially subjected to preferential refrigeration for the corresponding chamber.
2. The refrigerator defrosting method according to claim 1, characterized in that: the refrigerator defrosting method comprises the following steps: pre-cooling in a freezing chamber and pre-cooling in a refrigerating chamber; after the pre-cooling of the freezing chamber is finished, the defrosting of the freezing evaporator is independently carried out, and then the freezing preferential cooling is carried out; and then, pre-cooling the refrigerating chamber, and after the pre-cooling of the refrigerating chamber is finished, independently defrosting the refrigerating evaporator and sequentially refrigerating for preferential refrigeration.
3. The refrigerator defrosting method according to claim 1, characterized in that: the refrigerator defrosting method comprises the following steps: pre-cooling in a refrigerating chamber and pre-cooling in a freezing chamber; after the pre-cooling of the refrigerating chamber is finished, the refrigerating evaporator is independently defrosted and then refrigerating priority refrigeration is carried out, after the refrigerating priority refrigeration is finished, the refrigerating chamber is pre-cooled firstly, then the refrigerating evaporator is independently defrosted and freezing priority refrigeration is carried out successively.
4. The refrigerator defrosting method according to claim 2 or 3, characterized in that: the cold storage compartment pre-cooling comprises:
the electromagnetic valve is switched to the cold storage side, and the compressor works;
monitoring the freezing Pre-Cooling temperature TC1And the refrigerated precooling temperature T is setC1With a preset refrigerated pre-cooling temperature threshold value TC0Comparing;
when T isC1≤TC0And when the pre-cooling of the cold storage chamber is finished.
5. The refrigerator defrosting method according to claim 2 or 3, characterized in that: the freezer compartment pre-cooling comprises:
the electromagnetic valve is switched to the freezing side, and the compressor works;
monitoring the freezing Pre-Cooling temperature TD1And pre-cooling the frozen pre-cooledDegree TD1With a preset freezing precooling temperature threshold value TD0Comparing;
when T isD1≤TD0And (3) when precooling of the freezing chamber is finished, independently defrosting the freezing evaporator.
6. The refrigerator defrosting method according to claim 2 or 3, characterized in that: the defrosting of the freezing evaporator comprises closing an electromagnetic valve, and working a freezing heating wire until the defrosting of the freezing evaporator is finished; and the defrosting of the refrigeration evaporator comprises the closing of an electromagnetic valve, and the working of a refrigeration heating wire and/or a refrigeration fan is completed when the defrosting of the refrigeration evaporator is finished.
7. The refrigerator defrosting method according to claim 2 or 3, characterized in that: the freezing priority refrigeration comprises the following steps:
the electromagnetic valve is switched to the freezing side, the compressor works, and the freezing fan works;
monitoring priority freeze duration td1And the preferential freezing time period td1And a preset priority freezing time threshold value td0Comparing;
when t isd1≥td0When the cooling is completed, the freezing priority cooling is completed.
8. The refrigerator defrosting method according to claim 2 or 3, characterized in that: the refrigeration priority refrigeration is specifically as follows: and operating the original control program of the freezing chamber until the temperature of the freezing chamber reaches the shutdown temperature.
9. The refrigerator defrosting method according to claim 2 or 4, characterized in that: the refrigeration priority cooling comprises:
the electromagnetic valve is switched to the refrigerating side, the compressor works, and the refrigerating fan works;
monitoring a priority refrigeration time period tc1And the priority refrigeration time length t is setc1And a preset priority refrigeration time threshold value tc0Comparing;
when t isc1≥tc0And when the refrigeration is finished, the refrigeration priority refrigeration is finished.
10. A refrigerator, characterized in that: the refrigerator is used for realizing the defrosting method of the refrigerator as claimed in any one of claims 1 to 9.
CN202010709717.9A 2020-07-22 2020-07-22 Refrigerator defrosting method and refrigerator Active CN113970213B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002062026A (en) * 2000-08-22 2002-02-28 Fujitsu General Ltd Method for controlling defrost of electric refrigerator
CN103175327A (en) * 2013-03-14 2013-06-26 西安交通大学 Large freezing ability energy-saving refrigerating system and control method thereof
CN106766525A (en) * 2016-12-26 2017-05-31 青岛海尔股份有限公司 Wind cooling refrigerator and its defrosting control method
CN107062771A (en) * 2017-03-21 2017-08-18 Tcl家用电器(合肥)有限公司 Defrosting control method and wind cooling refrigerator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002062026A (en) * 2000-08-22 2002-02-28 Fujitsu General Ltd Method for controlling defrost of electric refrigerator
CN103175327A (en) * 2013-03-14 2013-06-26 西安交通大学 Large freezing ability energy-saving refrigerating system and control method thereof
CN106766525A (en) * 2016-12-26 2017-05-31 青岛海尔股份有限公司 Wind cooling refrigerator and its defrosting control method
CN107062771A (en) * 2017-03-21 2017-08-18 Tcl家用电器(合肥)有限公司 Defrosting control method and wind cooling refrigerator

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