CN108120210B - Defrosting control method and system of three-system refrigerator and refrigerator - Google Patents
Defrosting control method and system of three-system refrigerator and refrigerator Download PDFInfo
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- CN108120210B CN108120210B CN201711080302.4A CN201711080302A CN108120210B CN 108120210 B CN108120210 B CN 108120210B CN 201711080302 A CN201711080302 A CN 201711080302A CN 108120210 B CN108120210 B CN 108120210B
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- 238000010257 thawing Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000007710 freezing Methods 0.000 claims abstract description 146
- 230000008014 freezing Effects 0.000 claims abstract description 146
- 238000005057 refrigeration Methods 0.000 claims abstract description 43
- 238000011084 recovery Methods 0.000 claims abstract description 14
- 230000003111 delayed effect Effects 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 238000010792 warming Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/008—Defroster control by timer
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- Defrosting Systems (AREA)
Abstract
The invention provides a defrosting control method of a three-system refrigerator, wherein the three-system refrigerator adopts a series-parallel three-cycle structure, and the control method comprises the following steps: after the defrosting process is finished, the compressor is started after the time T1 is delayed; starting a compressor, and judging whether the absolute value of the difference value between the temperature t1 of the variable-temperature tuyere sensor and the temperature t2 of the variable-temperature compartment sensor is smaller than a preset difference value range; if the judgment result is yes, the electromagnetic valve is communicated with the freezing evaporator and the freezing capillary tube, and the freezing refrigeration lasts for T2 time; if the judgment result is negative, the electromagnetic valve is switched on to the freezing evaporator and the variable-temperature evaporator, and the refrigeration is carried out for T3 time while the temperature is changed and the refrigeration is carried out. The control method can switch the electromagnetic valve to the variable temperature branch when the temperature difference value exceeds the preset difference value range, so that the variable temperature chamber is refrigerated in advance, the load temperature rise of the variable temperature chamber during defrosting is effectively controlled, the time consumption of the recovery period is favorably shortened, and the energy consumption of the refrigerator is reduced.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to a defrosting control method and system for a three-system refrigerator and the refrigerator.
Background
At present, a freezing chamber of an existing series-parallel three-system refrigerator is usually shielded by a fan, a refrigerant flows through a freezing evaporator for precooling after defrosting, the evaporator supplies air to a compartment after precooling, and the freezing evaporator is generally provided with the fan for shielding to effectively prevent hot air after defrosting from entering the freezing chamber, so that defrosting of the freezing chamber and temperature rise in a recovery period are controlled.
However, for the refrigerator without fan shielding, especially for the refrigerator without bottom cooling and adopting the combination of the side plate and the back or only the side plate, the heat load is larger, and the load temperature rise of the compartment is difficult to control under high ambient temperature. Particularly, for the refrigerator without the fan for shielding the temperature-changing chamber, when the freezing chamber is precooled, the temperature-changing chamber is connected with the freezing chamber in series, so that the hot air after defrosting enters the temperature-changing chamber. And freezing because there is the fan to shield, hot-blast entering freezer that can not get into, like this, the load temperature rise of temperature-changing chamber will be higher than the load temperature rise of freezer, and this leads to the heat load of freezer and temperature-changing chamber to differ greatly, and the recovery period cooling after the defrosting is obviously asynchronous, and recovery period consumes time long, and the energy consumption increases.
In view of the above, it is desirable to provide a new defrosting control method for a three-system refrigerator to solve the above problems.
Disclosure of Invention
The invention aims to provide a novel defrosting control method for a three-system refrigerator, which can overcome the problem that the load temperature rise of a temperature-variable chamber is uncontrollable due to the fact that a temperature-variable chamber fan is not arranged for shielding, and timely control the load temperature rise of the temperature-variable chamber, so that the recovery period after defrosting is promoted to be synchronously cooled.
In order to achieve the purpose, the invention adopts the following technical scheme: a defrosting control method of a three-system refrigerator adopts a series-parallel three-cycle structure, and comprises the following steps:
after the defrosting process is finished, the compressor is started after the time T1 is delayed;
starting a compressor, and judging whether the absolute value of the difference value between the temperature t1 of the variable-temperature tuyere sensor and the temperature t2 of the variable-temperature compartment sensor is smaller than a preset difference value range;
if the judgment result is yes, the electromagnetic valve is communicated with the freezing evaporator and the freezing capillary tube, and the freezing refrigeration lasts for T2 time;
if the judgment result is negative, the electromagnetic valve is switched on to the freezing evaporator and the variable-temperature evaporator, and the refrigeration is carried out for T3 time while the temperature is changed and the refrigeration is carried out.
As a further improved technical scheme of the invention, the time T2 comprises precooling time T21, and the shielding of the refrigerating fan is closed within the time T21; at the critical point of T21, the freezing fan is shielded and turned on, and the freezing fan is turned on to refrigerate for T2-T21.
As a further improved technical scheme of the invention, the T3 time for warming and freezing and refrigerating comprises pre-cooling T31 time, and the shielding of a refrigerating fan is closed in T31 time; at the critical point of T31, the freezing fan is shielded and opened, the freezing fan and the variable temperature fan are started, and the refrigeration is carried out for T3-T31.
As a further improved technical scheme of the invention, before the defrosting process is started, the method also comprises the steps of closing the electromagnetic valve when the refrigerator runs and meets the defrosting condition, and starting the defrosting process after the compressor is stopped for T0 time.
As a further improved technical scheme of the invention, the control method further comprises the following steps that after the freezing refrigeration time T2 or the time T3 of changing temperature and freezing simultaneous refrigeration, the electromagnetic valve is switched on to switch on the freezing evaporator and the refrigerating evaporator until the temperature of the refrigerating chamber is reduced to the preset refrigerating temperature; the electromagnetic valve is switched on the freezing evaporator and the variable temperature evaporator until the temperature of the variable temperature chamber is reduced to a preset variable temperature; and the electromagnetic valve is switched to connect the freezing evaporator and the freezing capillary tube until the temperature of the freezing chamber is reduced to the preset freezing temperature, and the defrosting recovery process is quitted.
In order to achieve the purpose, the invention also provides a defrosting control system of the three-system refrigerator, wherein the single-system refrigerator adopts a series-parallel three-cycle refrigerator structure and comprises a control module, a timing module, a variable temperature air door temperature detection module and a variable temperature chamber temperature detection module; the control module is used for timing through the timing module after the defrosting process is finished, and controlling the compressor to be started after the time is delayed by T1; after the compressor is started, the control module judges whether the temperature difference detected by the variable temperature air door temperature detection module and the variable temperature chamber temperature detection module is within a preset difference range, controls the electromagnetic valve to be communicated with the freezing evaporator and the freezing capillary tube according to the judgment result, and performs freezing refrigeration for T2 time; or according to another judgment result, controlling the electromagnetic valve to switch on the freezing evaporator and the variable-temperature evaporator, and refrigerating for T3 time at the same time of temperature changing and freezing.
As a further improved technical scheme of the invention, the time T2 of the freezing refrigeration comprises a precooling time T21, the control module controls the shielding of the freezing fan to be closed in the time T21, and the control module opens the shielding of the freezing fan and starts the freezing fan at the critical point of T21.
As a further improved technical scheme of the invention, the time T3 for the refrigeration and temperature-changing refrigeration comprises a precooling time T31, the control module controls the shielding of the refrigerating fan to be closed in the time T31, and at the critical point of T31, the control module opens the shielding of the refrigerating fan and starts the refrigerating fan and the temperature-changing fan.
As a further improved technical scheme of the invention, the freezing evaporator is connected with the freezing capillary in series, and the freezing capillary is connected with the refrigerating evaporator and the variable-temperature evaporator in parallel.
In order to achieve the above object, the present invention further provides a refrigerator including the three-system refrigerator defrost control system as described above.
The invention has the beneficial effects that: compared with the prior art, the defrosting control method of the three-system refrigerator provided by the invention adds a judging step, controls the electromagnetic valve to select the corresponding refrigerating passage according to the temperature difference value of the air inlet temperature sensor of the variable-temperature chamber and the temperature sensor of the variable-temperature chamber monitored in real time, and can switch the electromagnetic valve to the variable-temperature branch when the temperature difference value exceeds the preset difference value range, so that the variable-temperature chamber is refrigerated in advance, the load temperature rise of the variable-temperature chamber during defrosting is effectively controlled, the time consumption of a recovery period is favorably shortened, and the energy consumption of the refrigerator is reduced.
Drawings
Fig. 1 is a schematic perspective view of a three-system refrigerator in a preferred embodiment of the present invention;
fig. 2 is a block diagram of a defrost control system of a three-system refrigerator in a preferred embodiment of the present invention;
fig. 3 is a flowchart of a defrost control method of a three-system refrigerator in a preferred embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.
Terms such as "upper," "above," "lower," "below," and the like, used herein to denote relative spatial positions, are used for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Also, it should be understood that, although the terms first, second, etc. may be used herein to describe various elements or structures, these described elements should not be limited by these terms. These terms are only used to distinguish these descriptive objects from one another.
As shown in fig. 1, a preferred refrigerator of the present invention includes three refrigerating compartments, i.e., a refrigerating compartment, a freezing compartment, and a temperature-changing compartment. The refrigerating chamber is arranged above the refrigerator and is independently refrigerated by a refrigerating evaporator (not shown in the figure), the freezing chamber and the temperature-changing chamber are arranged below the refrigerator, the freezing chamber is refrigerated by the freezing evaporator, and the temperature-changing chamber is refrigerated by the temperature-changing evaporator. Of course, the arrangement of the refrigeration compartments is not limited to the specific manner of the embodiment, and those skilled in the art can make corresponding changes and adjustments according to the design requirements.
Referring to the block diagram of the defrosting control system of the three-system refrigerator shown in fig. 2, the refrigerator includes a compressor, a condenser, a drying filter, a freezing evaporator, a freezing fan, a freezing capillary tube, an electromagnetic valve, a refrigeration parallel branch and a temperature-varying parallel branch, which are arranged in the main path and are connected in series with each other, and the refrigeration fan, the freezing capillary tube and the electromagnetic valve are matched with the freezing evaporator. The refrigeration parallel branch comprises a refrigeration evaporator, a refrigeration fan and a refrigeration capillary, the refrigeration fan is matched with the refrigeration evaporator, and the temperature-changing parallel branch comprises a temperature-changing evaporator, a temperature-changing fan and a temperature-changing capillary, the temperature-changing fan is matched with the temperature-changing evaporator. In other words, the freezing evaporator is connected in series with the freezing capillary tube, and the freezing capillary tube is connected in parallel with the refrigerating evaporator and the temperature-changing evaporator. A freezing fan is arranged in the freezing chamber air duct for shielding, when the freezing fan is shielded and closed, the freezing air duct is closed, and airflow cannot flow into the freezing chamber through the freezing air duct. Wherein, the solenoid valve is an electronic three-way valve.
As shown in fig. 3, an embodiment of the present invention provides a defrosting control method for a three-system refrigerator, where the three-system refrigerator adopts a series-parallel three-cycle structure, and the defrosting control method includes the following steps:
and S0, before the defrosting process is started, when the refrigerator meets the defrosting condition, closing the electromagnetic valve, and starting the defrosting process after the compressor is stopped for T0 time. Wherein the value range of T0 is 3-7 minutes, and the specific value is determined according to the size of the refrigerator. After the defrosting process is finished, time control is firstly carried out, and then temperature control is carried out.
S1, after the defrosting process is finished, the compressor is started after the time T1 is delayed; the value range of the T1 is 10-15 minutes, and the specific value is determined according to the size of the refrigerator. The compressor is not started immediately after defrosting, but is started after a period of time delay, so that high-temperature steam in the evaporator can be prevented from entering the compressor after defrosting to cause burnout; in addition, the defrosting device is favorable for slowing down the accumulation speed of a frost layer on the surface of the evaporator (because the defrosting water exists on the surface of the evaporator after defrosting, the surface of the evaporator is frozen when a compressor is directly started), the defrosting interval is prolonged, the defrosting times are reduced, meanwhile, the heat generated in the defrosting process is prevented from diffusing into the box body, and the influence of the defrosting process on the power consumption of the refrigerator is reduced. And then, by combining time with temperature control, the refrigeration and freezing are restored to a normal and stable running state as soon as possible, the time used in the defrosting recovery period is shortened, and the energy consumption in the defrosting recovery period is further reduced.
S2, starting a compressor, collecting the temperature t1 of the variable-temperature tuyere sensor and the temperature t2 of the variable-temperature compartment sensor, and judging whether the absolute value of the difference value between the temperature t1 of the variable-temperature tuyere sensor and the temperature t2 of the variable-temperature compartment sensor is smaller than a preset difference value range (t 3-t 4), wherein the preset difference value range (t 3-t 4) is generally 2.5-4 ℃.
And S3, when the absolute value of the difference value is smaller than a preset difference value range (T3-T4), namely the judgment result is yes, the load temperature rise of the temperature changing chamber is not obvious, at the moment, the electromagnetic valve is connected with the freezing evaporator and the freezing capillary tube, and the freezing independent refrigeration is carried out for T2 time. The time T2 includes the time T21 of precooling, and the shielding of the freezing fan is closed in the time T21; at the critical point of T21, the freezing fan is shielded and turned on, and the freezing fan is turned on to refrigerate for T2-T21. During precooling, the freezing fan is shielded and closed, so that hot air for defrosting is prevented from entering the freezing chamber through the freezing air duct, and the temperature of the freezing chamber is increased. After the time of precooling T21, the temperature of the air around the refrigeration evaporator is reduced, the refrigeration fan is turned on to shield the air, and the refrigeration fan is started, so that the refrigeration evaporator is further cooled.
And S4, when the absolute value of the difference value exceeds a preset difference value range (T3-T4), namely the judgment result is negative, switching the electromagnetic valve to connect the freezing evaporator and the variable-temperature evaporator, and refrigerating for T3 time at the same time of temperature change and freezing. The absolute value of the difference value between the temperature t1 of the variable-temperature chamber air inlet sensor and the temperature t2 of the variable-temperature chamber sensor exceeds a preset difference value range (t 3-t 4), which indicates that the temperature of the variable-temperature chamber air inlet rises, at the moment, the electromagnetic valve is switched to be connected with the variable-temperature parallel branch, so that the variable-temperature evaporator starts to refrigerate, the load temperature rise of the variable-temperature chamber can be controlled timely and effectively, and the condition that the defrosting recovery is asynchronous due to the fact that the temperature of the variable-temperature chamber is too fast in the. The T3 time for warming and freezing and refrigerating comprises precooling T31 time, and the freezing fan is shielded and closed in T31 time; at the critical point of T31, the freezing fan is shielded and opened, the freezing fan and the variable temperature fan are started, and the refrigeration is carried out for T3-T31. In the precooling process, the shielding of the freezing fan is beneficial to preventing hot air for defrosting from entering the freezing chamber through the freezing air duct to cause the temperature rise of the freezing chamber. After the time of precooling T31, the temperature of the air around the freezing evaporator is reduced, at the moment, the freezing fan is turned on to shield, and then the freezing fan and the temperature-changing fan are started, which is beneficial to further reducing the temperature of the freezing evaporator and the temperature-changing evaporator.
And S5, after the freezing refrigeration time T2 or the time T3 of changing temperature and freezing simultaneous refrigeration, the electromagnetic valve switches to switch on the freezing evaporator and the refrigerating evaporator until the temperature of the refrigerating chamber is reduced to the preset refrigerating temperature. And S6, switching the electromagnetic valve on the freezing evaporator and the variable temperature evaporator until the temperature of the variable temperature chamber is reduced to a preset variable temperature. And S7, switching on the freezing evaporator and the freezing capillary tube by the electromagnetic valve until the temperature of the freezing chamber is reduced to the preset freezing temperature, and exiting the defrosting recovery process.
The sequence of the steps S5, S6 and S7 may be changed.
The load temperature rise condition of the temperature-changing chamber is judged by comparing the temperature difference value of the air inlet temperature sensor of the temperature-changing chamber and the temperature sensor of the temperature-changing chamber monitored in real time with the preset difference value range, the electromagnetic valve is controlled to select the corresponding refrigerating passage, and the electromagnetic valve can be switched to the temperature-changing branch when the temperature difference value exceeds the preset difference value range (t 3-t 4), so that the temperature-changing chamber is refrigerated in advance, the load temperature rise of the temperature-changing chamber during defrosting is effectively controlled, the time consumption of the recovery period is favorably shortened, and the energy consumption of the refrigerator is reduced.
The embodiment of the invention also provides a defrosting control system of the three-system refrigerator, wherein the single-system refrigerator adopts a series-parallel three-cycle refrigerator structure and comprises a control module, a timing module, a variable temperature air door temperature detection module and a variable temperature chamber temperature detection module; the control module is used for timing through the timing module after the defrosting process is finished, and controlling the compressor to be started after the time is delayed by T1; after the compressor is started, the control module judges whether the temperature difference detected by the variable temperature air door temperature detection module and the variable temperature chamber temperature detection module is within a preset difference range, controls the electromagnetic valve to be communicated with the freezing evaporator and the freezing capillary tube according to the judgment result, and performs freezing refrigeration for T2 time; or according to another judgment result, controlling the electromagnetic valve to switch on the freezing evaporator and the variable-temperature evaporator, and refrigerating for T3 time at the same time of temperature changing and freezing.
Preferably, the T2 time of the freezing refrigeration includes a pre-cooling time T21, the control module controls the freezing fan to shield off during T21 time, and at the critical point of T21, the control module turns on the freezing fan to shield and turns on the freezing fan.
Preferably, the time T3 for the cooling and temperature changing cooling includes a pre-cooling time T31, the control module controls the shielding of the freezing fan to be closed during the time T31, and at a critical point of T31, the control module turns on the shielding of the freezing fan and turns on the freezing fan and the temperature changing fan.
Corresponding to the corresponding steps of the control method, before the defrosting process is started, when the refrigerator runs and meets the defrosting condition, the control module closes the electromagnetic valve, so that the compressor is stopped for T0 time, and then the defrosting process is started. After the defrosting process is finished, the control module controls the compressor to be started after the time delay of T1.
Further, after the time of freezing refrigeration T2 or the time of freezing and variable temperature refrigeration T3, the control module controls the electromagnetic valve to switch on the freezing evaporator and the refrigerating evaporator until the temperature of the refrigerating chamber is reduced to the preset refrigerating temperature. And then, the control module controls the electromagnetic valve to switch on the freezing evaporator and the variable-temperature evaporator until the temperature of the variable-temperature chamber is reduced to a preset variable-temperature. And finally, the control module controls the electromagnetic valve to switch on the freezing evaporator and the freezing capillary until the temperature of the freezing chamber is reduced to a preset freezing temperature, and the defrosting recovery process is quit.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. A defrosting control method for a three-system refrigerator adopts a series-parallel three-cycle structure,
the method is characterized in that: the control method comprises the following steps:
after the defrosting process is finished, the compressor is started after the time T1 is delayed;
starting a compressor, and judging whether the absolute value of the difference value between the temperature t1 of the variable-temperature tuyere sensor and the temperature t2 of the variable-temperature compartment sensor is smaller than a preset difference value range;
if the judgment result is yes, the electromagnetic valve is communicated with the freezing evaporator and the freezing capillary tube, and the freezing refrigeration lasts for T2 time;
if the judgment result is negative, the electromagnetic valve is switched on to the freezing evaporator and the variable-temperature evaporator, and the refrigeration is carried out for T3 time while the temperature is changed and the refrigeration is carried out.
2. The defrost control method of the three-system refrigerator of claim 1, wherein: the time T2 includes the time T21 of precooling, and the shielding of the freezing fan is closed in the time T21; at the critical point of T21, the freezing fan is shielded and turned on, and the freezing fan is turned on to refrigerate for T2-T21.
3. The defrost control method of the three-system refrigerator of claim 2, wherein: t3 time for warming and freezing and refrigerating simultaneously comprises pre-cooling T31 time, and in the T31 time, a refrigerating fan is shielded and closed; at the critical point of T31, the freezing fan is shielded and opened, the freezing fan and the variable temperature fan are started, and the refrigeration is carried out for T3-T31.
4. The defrost control method of the three-system refrigerator of claim 1, wherein: before the defrosting process is started, when the refrigerator runs and meets the defrosting condition, the electromagnetic valve is closed, and the defrosting process is started after the compressor is stopped for T0 time.
5. The defrost control method of the three-system refrigerator of claim 1, wherein: the control method further comprises the step that after the freezing refrigeration time T2 or the temperature-changing and freezing simultaneous refrigeration time T3, the electromagnetic valve is switched on the freezing evaporator and the refrigerating evaporator until the temperature of the refrigerating chamber is reduced to the preset refrigerating temperature; the electromagnetic valve is switched on the freezing evaporator and the variable temperature evaporator until the temperature of the variable temperature chamber is reduced to a preset variable temperature; and the electromagnetic valve is switched to connect the freezing evaporator and the freezing capillary tube until the temperature of the freezing chamber is reduced to the preset freezing temperature, and the defrosting recovery process is quitted.
6. The utility model provides a defrost control system of three system refrigerator, three system refrigerator adopts series-parallel three-cycle refrigerator structure which characterized in that: the temperature control device comprises a control module, a timing module, a variable temperature air door temperature detection module and a variable temperature chamber temperature detection module; the control module is used for timing through the timing module after the defrosting process is finished, and controlling the compressor to be started after the time is delayed by T1; after the compressor is started, the control module judges whether the temperature difference detected by the variable temperature air door temperature detection module and the variable temperature chamber temperature detection module is within a preset difference range, controls the electromagnetic valve to be communicated with the freezing evaporator and the freezing capillary tube according to the judgment result, and performs freezing refrigeration for T2 time; or according to another judgment result, controlling the electromagnetic valve to switch on the freezing evaporator and the variable-temperature evaporator, and refrigerating for T3 time at the same time of temperature changing and freezing.
7. The defrost control system of the three-system refrigerator of claim 6, wherein: the time T2 of the freezing refrigeration comprises precooling time T21, the control module controls the shielding of the freezing fan to be closed in the time T21, and the control module opens the shielding of the freezing fan and starts the freezing fan at the critical point of T21.
8. The defrost control system of the three-system refrigerator of claim 6, wherein: the T3 time for the simultaneous cooling of temperature changing and freezing comprises precooling time T31, the control module controls the shielding of the freezing fan to be closed in T31 time, and at the critical point of T31, the control module opens the shielding of the freezing fan and starts the freezing fan and the temperature changing fan.
9. The defrost control system of the three-system refrigerator of claim 6, wherein: the freezing evaporator is connected with the freezing capillary in series, and the freezing capillary is connected with the cold storage evaporator and the variable temperature evaporator in parallel.
10. A refrigerator, characterized in that: a defrost control system for a three system refrigerator comprising a system as claimed in any one of claims 6-9.
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| CN109883109A (en) * | 2019-02-26 | 2019-06-14 | 青岛海尔特种电冰柜有限公司 | Multi-cycle refrigerator |
| CN110887311B (en) * | 2019-11-07 | 2021-12-03 | 合肥华凌股份有限公司 | Temperature control method for single-system air-cooled refrigerator, electronic equipment and medium |
| CN111121383A (en) * | 2019-12-30 | 2020-05-08 | 青岛海尔电冰箱有限公司 | Defrosting control method of single-system refrigerator, electronic device and refrigerator |
| CN111238073A (en) * | 2020-03-12 | 2020-06-05 | 长虹美菱股份有限公司 | Refrigerator refrigerating system |
| CN113970227A (en) * | 2020-07-22 | 2022-01-25 | 海信（山东）冰箱有限公司 | Three-system refrigerator and control method |
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| US6694754B1 (en) * | 2002-03-22 | 2004-02-24 | Whirlpool Corporation | Refrigeration appliance with pulsed defrost heater |
| CN201434555Y (en) * | 2009-03-27 | 2010-03-31 | 合肥美菱股份有限公司 | Three-door refrigerator with food unfreezing function |
| CN101858663A (en) * | 2009-04-10 | 2010-10-13 | 凌建军 | Heat exchange system for multi-refrigerating circuit refrigerator and refrigerator-disinfection cabinet all-in-one machine |
| CN101871715A (en) * | 2009-04-24 | 2010-10-27 | 海尔集团公司 | Refrigerator |
| CN102313428A (en) * | 2011-10-13 | 2012-01-11 | 海尔集团公司 | Direct cooling way refrigerator |
| CN105466115B (en) * | 2014-08-28 | 2020-01-17 | 博西华电器（江苏）有限公司 | Refrigerator and control method thereof |
| CN106016920B (en) * | 2016-05-30 | 2019-04-09 | 合肥美的电冰箱有限公司 | A kind of dual system defroster consumption control method, system and refrigerator |
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