CN110822807B - Refrigerator and freezing control method thereof - Google Patents
Refrigerator and freezing control method thereof Download PDFInfo
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- CN110822807B CN110822807B CN201910998263.9A CN201910998263A CN110822807B CN 110822807 B CN110822807 B CN 110822807B CN 201910998263 A CN201910998263 A CN 201910998263A CN 110822807 B CN110822807 B CN 110822807B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/36—Freezing; Subsequent thawing; Cooling
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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
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/16—Sensors measuring the temperature of products
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Abstract
The invention provides a refrigerator and a freezing control method thereof, wherein the refrigerator comprises: the quick freezing chamber has the function of quick freezing storage; the refrigerating system is used for storing the cold quantity required by the articles to be refrigerated in the quick refrigerating chamber; the control system controls the refrigerating system to rapidly freeze and store the articles to be frozen of the rapid freezing chamber: firstly, cooling, when the current temperature of the articles to be frozen in the rapid freezing chamber is detected to be not less than the freezing temperature of the articles to be frozen and reaches the preset temperature, rapidly freezing, and after the preset time, controlling the refrigerating system to carry out conventional refrigeration storage. The refrigerator provided by the invention can realize supercooling unfreezing and supercooling relieving rapid freezing of the articles to be frozen, so that the freezing process of the articles to be frozen is quicker, meanwhile, the damage to cells of the articles to be frozen is avoided, and the loss of nutrient substances in the freezing and unfreezing processes is reduced.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to a refrigerator and a freezing control method thereof.
Background
According to the basic principle of freezing, the faster the crystallization speed of the liquid is in the process of realizing freezing, the smaller and more round the ice crystals are. When the traditional refrigerator freezes food, because the air outlet temperature of the freezing chamber or the freezing chamber is low, the heat conductivity coefficient of the food is low, the heat transfer efficiency is low, and the surface of the food is often frozen firstly and then slowly crystallized towards the interior of the food gradually. In this state, the ice crystals formed by freezing the food have large volume and high hardness, so that the food must be thawed for processing; meanwhile, ice crystals formed in the freezing process are sharp in shape and easily puncture food cells, and during the thawing process, cell sap of the punctured food cells is lost, so that the loss of the nutritional ingredients of the food is caused. Therefore, how to effectively reduce the loss of the nutrient components of the food in the thawing process while quickly freezing the food is an urgent problem to be solved.
Disclosure of Invention
In view of the above problems, the present invention provides a refrigerator and a freezing control method thereof that overcome or at least partially solve the above problems.
According to an aspect of the present invention, there is provided a refrigerator including:
the quick freezing chamber has the function of quick freezing storage;
the refrigerating system is used for storing the cold quantity required by the articles to be frozen in the quick freezing chamber;
the control system controls the refrigerating system to rapidly freeze and store the articles to be frozen in the rapid freezing chamber: firstly, cooling, when the current temperature of the articles to be frozen in the quick freezing chamber is detected to be not less than the freezing temperature of the articles to be frozen and reaches a preset temperature, quickly freezing, and controlling the refrigerating system to carry out conventional refrigeration storage after the preset time.
Optionally, the control system is further configured to, at the beginning of the cooling down phase, control the refrigeration system to perform pre-cooling first, perform sub-cooling after continuously or in stages cooling down the ambient temperature of the fast freezing chamber or the temperature of the article to be frozen to a temperature T1, and cool down the ambient temperature of the fast freezing chamber or the temperature of the article to be frozen to a temperature T4;
wherein the temperature T1 is not less than the freezing temperature T2 of the object to be frozen, and T4 < T1.
Optionally, the refrigeration system includes a forced convection device disposed in the rapid-freezing chamber;
the control system is also used for starting the forced convection device to perform supercooling release on the goods to be frozen in the quick freezing stage.
Optionally, the forced convection apparatus remains closed during the cool down and conventional refrigerated storage.
Optionally, in the process of releasing supercooling of the articles to be frozen, the ambient temperature of the rapid freezing chamber or the temperature of the articles to be frozen is increased from the temperature T4 to the temperature T2, and is decreased to the temperature T5 after a period of time, wherein T5 is less than T4.
Optionally, the control system is further configured to control the ambient temperature of the fast freezing compartment or the temperature of the item to be frozen to rise to a temperature T3, T4 < T3 < T2 during the normal refrigeration preservation phase.
According to another aspect of the present invention, there is also provided a freezing control method of a refrigerator, the refrigerator including:
the quick freezing chamber has the function of quick freezing storage;
the refrigerating system is used for storing the cold quantity required by the articles to be frozen in the quick freezing chamber;
the control system controls the refrigerating system to carry out quick freezing storage on the articles to be frozen in the quick freezing chamber;
the method comprises the following steps:
control refrigerating system is right the quick freezing room treat freezing article and carry out quick freezing storage, it includes:
cooling;
if the current temperature of the articles to be frozen in the quick freezing chamber is detected to be not less than the freezing temperature of the articles to be frozen and reaches a preset temperature, quick freezing is carried out;
and controlling the refrigeration system to carry out conventional refrigeration preservation after a preset time.
Optionally, the cooling includes:
pre-cooling by the refrigerating system, and continuously or in stages cooling the ambient temperature of the quick freezing chamber or the temperature of the articles to be frozen to a temperature T1;
supercooling, and reducing the ambient temperature of the quick freezing chamber or the temperature of the articles to be frozen to a temperature T4;
wherein the temperature T1 is not less than the freezing temperature T2 of the object to be frozen, and T4 < T1.
Optionally, the refrigeration system includes a forced convection device disposed in the rapid-freezing chamber;
and when the quick freezing is carried out, starting the forced convection device to carry out supercooling release on the article to be frozen.
Optionally, the forced convection apparatus remains closed during the cool down and conventional refrigerated storage.
Optionally, when the article to be frozen is released from supercooling, the ambient temperature of the quick freezing chamber or the temperature of the article to be frozen is controlled to be increased from the temperature T4 to the temperature T2, and is reduced to the temperature T5 after a period of time, wherein T5 is less than T4.
Optionally, the controlling the refrigeration system to perform normal refrigeration preservation after the preset time includes:
and controlling the operation of the refrigeration system after a preset time so as to control the ambient temperature of the quick freezing chamber or the temperature of the articles to be frozen to be raised to a temperature T3, wherein T4 < T3 < T2.
The invention provides a refrigerator with a quick freezing function and a control method thereof, based on the refrigerator provided by the invention, a quick freezing chamber is arranged in the refrigerator, and a control system controls a refrigerating system to respectively carry out cooling, quick freezing and conventional refrigerating and storing stages, so that supercooling unfreezing and supercooling release quick freezing of an object to be frozen can be realized, the freezing process of the object to be frozen is quicker, ice crystals are finer and more mellow, and knife cutting can be easily realized without unfreezing; meanwhile, the damage of cells of the object to be frozen is avoided, and the loss of nutrient substances in the freezing and unfreezing processes is reduced.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 illustrates a structural schematic view of a refrigerator according to an embodiment of the present invention;
FIG. 2 is a flow chart of a refrigerator quick-freezing control method according to an embodiment of the present invention;
FIG. 3 shows a schematic diagram of temperature control of articles to be rapidly frozen according to an embodiment of the present invention;
fig. 4 is a flow chart illustrating a freezing control method of a refrigerator according to a preferred embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Fig. 1 shows a schematic structural diagram of a refrigerator 100 according to an embodiment of the present invention, and as can be seen from fig. 1, the refrigerator 100 according to the embodiment may include a fast-freezing chamber 110, a refrigeration system (not shown in the figure), and a control system (not shown in the figure), wherein the fast-freezing chamber 110 has a function of fast-freezing storage, and in addition, the refrigerator 100 may further include a refrigerating chamber and a normal freezing chamber to meet different freezing requirements for articles. While the cooling capacity required for the fast-freezing compartment 110 to store the items to be frozen comes from the refrigeration system. The item to be frozen in this embodiment may be a food product, particularly meat, which requires frozen storage.
The refrigeration system in this embodiment may be a refrigeration system composed of a compressor, a condenser, a throttling element (such as a capillary tube), and an evaporator, which are connected in sequence by a pipeline to form a closed system, and a refrigerant is continuously circulated in the system, and undergoes a state change to exchange heat with the outside. When the refrigerating system works, the compressor can compress the steam with lower pressure into the steam with higher pressure, so that the volume of the steam is reduced, and the pressure is increased. The compressor sucks working medium steam with lower pressure from the evaporator, the working medium steam with lower pressure is sent into the condenser after the pressure of the working medium steam is increased, the working medium steam is condensed into liquid with higher pressure in the condenser, the liquid with lower pressure is sent into the evaporator after the liquid is throttled by the throttle valve, the liquid is evaporated by absorbing heat in the evaporator to form steam with lower pressure, and the steam is sent into an inlet of the compressor, so that the refrigeration cycle is completed.
And the control system is mainly used for controlling the refrigerating system to carry out quick freezing storage on the articles to be frozen in the quick freezing chamber 110. It may include a controller (e.g., a main control chip, etc.) to control the operating status of various components in the refrigeration system. In this embodiment, when the control system controls the refrigeration system to perform rapid freezing, cooling is performed first, when it is detected that the current temperature of the articles to be frozen in the rapid freezing chamber 110 is not less than the freezing temperature of the articles to be frozen and reaches a preset temperature, rapid freezing is performed, and after a preset time, the refrigeration system is controlled to perform conventional refrigeration storage.
The embodiment of the invention provides a refrigerator 100 with a quick freezing function, wherein a quick freezing chamber 110 is arranged in the refrigerator 100, and a control system controls a refrigerating system to respectively carry out cooling, quick freezing and conventional refrigerating and storing stages, so that supercooling unfreezing and supercooling release quick freezing of an object to be frozen can be realized, the freezing process of the object to be frozen is quicker, ice crystals are finer and more smooth, and cutting can be easily realized without unfreezing; meanwhile, the damage of cells of the object to be frozen is avoided, and the loss of nutrient substances in the freezing and unfreezing processes is reduced.
When the control system controls the refrigeration system to perform rapid refrigeration, the control system may mainly include three stages, namely, cooling, rapid freezing and conventional refrigeration storage, which are described in detail below.
Firstly, cooling
The cooling phase in this embodiment can be divided into a pre-cooling phase and a sub-cooling phase.
1. Stage of precooling
The items to be frozen are placed in the freezer compartment 110, the freezer compartment 110 begins to cool continuously or in stages, and the refrigeration system cools (air or direct) in a conventional manner, this stage being maintained for a time t 1. At the end of the pre-cooling phase, the temperature T1 of the flash freezer compartment 110 or the item to be frozen should not be lower than the freezing temperature T2 of the item to be frozen itself. Alternatively, a functional module such as a clock or a timer may be added to determine the time t 1. Wherein, T2 is the freezing point temperature of the article to be frozen, half is lower than the freezing point (0 ℃) of water, and the temperature of the article to be frozen is not lower than the freezing point temperature T2 by controlling the temperature of the quick freezing chamber 110 to be above 0 ℃ in the stage. Wherein the temperature of the air needs to be detected by a temperature sensor.
2. Stage of subcooling
During the subcooling phase, the components of the refrigeration system continue to operate in accordance with the precooling phase to continuously or in stages decrease the temperature of the flash freezer compartment 110 or articles to be frozen and then maintain the temperature of the flash freezer compartment 110 or articles to be frozen for a period of time up to T3 when the temperature of the flash freezer compartment 110 or articles to be frozen reaches T4. The period of time for which the temperature field inside the article to be frozen is maintained may be made more uniform, or a lower supercooling temperature may be obtained, and ice crystal particles formed when supercooling is released may be made more uniform.
That is, the control system is further configured to, at the beginning of the cooling phase, control the refrigeration system to perform pre-cooling, continuously or in stages, to cool down the ambient temperature of the fast freezing compartment 110 or the temperature of the articles to be frozen to the temperature T1, and then perform sub-cooling, to cool down the ambient temperature of the fast freezing compartment 110 or the temperature of the articles to be frozen to the temperature T4; wherein the temperature T1 is not less than the freezing temperature T2 of the object to be frozen, and T4 < T1.
Second, quick freezing
Optionally, the refrigeration system may further include a forced convection apparatus 120 disposed in the rapid-freezing chamber 110, and the disposition position may be set according to various requirements, which is not limited in the present invention. The control system is also configured to activate the forced convection apparatus 120 to subcool the item to be frozen during the rapid freeze phase. The forced convection apparatus 120 remains closed during cool down and conventional refrigerated storage.
In this embodiment, the forced convection refers to a mechanical blowing manner, and all devices that can achieve mechanical blowing belong to the forced convection device 120, such as a fan. In this embodiment, the forced convection device 120 is disposed in the refrigerator 100 during fast freezing, the air outlet direction of the fan is aligned to the object to be frozen, and the start and stop of the fan are controlled at different stages of the freezing process of the object to be frozen, so as to respectively achieve supercooling unfreezing and supercooling release fast freezing of the object to be frozen.
That is, in the fast freezing stage, the independent forced convection apparatus 120 is turned on, so that the temperature and the cooling rate of the object to be frozen are disturbed, the supercooled state of the object to be frozen is released, a large amount of fine ice crystals are rapidly formed inside the object to be frozen, and the mechanical damage of the object to be frozen is reduced, and the stage is maintained for time t 7. The item to be frozen is then continuously cooled to T5 for a period of time.
In addition, during the process of supercooling release of the articles to be frozen, the ambient temperature of the quick freezing chamber 110 or the temperature of the articles to be frozen is increased from the temperature T4 to the temperature T2, and is decreased to the temperature T5 after a period of time, wherein T5 is less than T4. In practical citation, it is a natural law that the supercooling temperature is raised from T4 to T2 (freezing point) after the convection device is started, and it is a natural law that the supercooling temperature is maintained at T2 (the temperature in the phase change process is unchanged, for example, 0 ℃ is always used when water becomes ice), and after the supercooling temperature is completely frozen, the supercooling temperature is continuously reduced to T5 and maintained at T5 for a period of time so as to ensure the uniformity of the object to be frozen at low temperature and avoid the growth of ice crystals in the temperature raising process.
Third, conventional refrigeration preservation
The control system is also used to control the ambient temperature of the fast-freezing compartment 110 or the temperature of the articles to be frozen to rise to a temperature T3, T4 < T3 < T2 during the normal refrigerated preservation phase.
After the quick freezing is finished, the temperature of the quick freezing chamber 110 or the object to be frozen is controlled to be raised to T3, wherein the T3 is not higher than the freezing point T2 of the object to be frozen. At this time, fine and uniform granular ice crystals are distributed inside and outside the frozen object to be frozen, and the frozen object can be easily cut by a knife even if the frozen object is immediately cooked.
In another embodiment of the present invention, a method for controlling freezing of a refrigerator is also provided, which can be applied to the refrigerator 100 of any of the above embodiments. The method may include controlling a refrigeration system to perform a fast-freeze storage of items to be frozen in the fast-freeze compartment 110, which may include, with reference to fig. 2:
step S201, performing cooling, which may include:
s1, pre-cooling by a refrigerating system, and continuously or stage-by-stage cooling the ambient temperature of the quick freezing chamber 110 or the temperature of the articles to be frozen to a temperature T1;
s2, supercooling, and cooling the environment temperature of the quick freezing chamber 110 or the temperature of the articles to be frozen to a temperature T4; wherein the temperature T1 is not less than the freezing temperature T2 of the object to be frozen, and T4 < T1.
In step S202, if it is detected that the current temperature of the articles to be frozen in the fast freezing chamber 110 is not less than the freezing temperature of the articles to be frozen and reaches a preset temperature, fast freezing is performed.
As mentioned above, the rapid freezer compartment 110 may be provided with the forced convection apparatus 120 (e.g., a fan), and in this step S202, when rapid freezing may be performed, the forced convection apparatus 120 is activated to supercool the articles to be frozen. In the process of step S201, the convection device 120 is forced to be closed. When the supercooling is released, the ambient temperature of the fast freezing chamber 110 or the temperature of the articles to be frozen is controlled to be increased from the temperature T4 to the temperature T2, and the temperature is reduced to the temperature T5 after a period of time, wherein T5 is less than T4.
Step S203, controlling a refrigeration system to carry out conventional refrigeration storage after preset time; that is, the operation of the refrigeration system is controlled after a preset time to control the ambient temperature of the quick-freezing compartment 110 or the temperature of the articles to be frozen to be raised to a temperature T3, T4 < T3 < T2. During this process, the forced convection apparatus 120 remains closed. The preset time can be set independently according to different conditions, and the invention is not limited.
According to the refrigerator freezing control method provided by the embodiment of the invention, the refrigerator 100 is provided with the quick freezing chamber 110, the single forced convection device 120 is arranged in the quick freezing chamber 110, the air outlet direction of the forced convection device 120 is aligned to an article to be frozen, the start and stop of a fan are controlled at different stages in the freezing process of the article to be frozen, and the supercooling non-freezing and supercooling release quick freezing of the article to be frozen are respectively realized.
The freezing control method of the refrigerator mentioned in the above embodiments is explained in detail by a preferred embodiment. In the embodiment, the forced convection device 120 is arranged inside the quick freezing chamber 110, and the forced convection device 120 is selectively started at different stages of cooling the articles to be frozen, so that the supercooling unfreezing and supercooling release quick freezing of the articles to be frozen are realized. The control mode adopts temperature and time combined control, when each stage reaches the preset temperature or exceeds the preset running time, the next stage is started, and the temperature of the articles to be quickly frozen is controlled as shown in figure 3.
In fig. 3, the meaning and preferred values of the symbols may be as follows:
t, the actual temperature of the article to be frozen;
t1, end temperature of pre-cooling stage cooling (i.e. set temperature of pre-cooling stage); the range is 0-10 ℃, and the preferred range is 2-5 ℃;
t2, freezing point temperature (set point) of the item to be frozen; the optional range is-10 ℃ to 0 ℃, and the optimal range is-3 ℃ to 0 ℃;
t3, the final temperature (setpoint) at which the item to be frozen freezes; the optional range is-10 to-2 ℃, and the preferred range is-7 to-3 ℃;
t4, supercooling temperature (set value) of the item to be frozen in the supercooling stage; the optional range is-10 ℃ to 2 ℃, and the optimal range is-7 ℃ to-5 ℃;
t5, minimum temperature (set value) of the article to be frozen by forced convection during the rapid freezing phase; the temperature is in the range of-15 to 0 ℃, preferably-8 to-6 DEG C
T1, actual operating time when the temperature of the quick freezer compartment 110 drops to T1;
t2, actual runtime when temperature dropped to T2;
t3, T4 maintains the actual operation time after the end in the supercooling phase;
t4, actual running time for temperature to rise to freezing point when supercooling is released in the quick freezing stage;
t5, the actual time of end of freeze in the quick freeze phase;
t6, actual running time of the item to be frozen reduced to the minimum temperature T5;
t7, maintaining the temperature of the article to be frozen at the running time at the end of T5;
t1 and t7 are mainly for clarity of expression, and specific values can be freely set for calculating the time periods of each stage.
a, cooling time (set value) of a pre-cooling stage; the optional range is 2-8 h, and the preferable range is 4-6 h;
b, time to run to temperature T4 (set point); the optional range is 7-15 h, preferably 11-13 h;
c, the time (set value) for maintaining the supercooling phase at T4; the optional range is 1-3 h, preferably 1.5-2.5 h;
d, time (set point) for the quick freeze phase to fall to temperature T5; the optional range is 10-18h, preferably 15-17 h;
e, the time (set value) when the operation of the quick freezing stage is finished; the optional range is 12-24h, preferably 16-20 h;
f, maintaining the quick freezing stage at the time of T5 (set value); the optional range is 0-3h, and preferably 1-2 h. The temperature and implementation-limited range is limited by the temperature and time at different stages, and may be adaptively adjusted according to the type of the article to be frozen, the size of the refrigerator 100, or the application scenario, which is not limited in the present invention.
In this embodiment, the specific process of each stage of the refrigeration system is as follows:
stage 1, pre-cooling stage.
The items to be frozen are placed in the rapid-freezing chamber 110, the rapid-freezing chamber 110 is cooled down continuously or in stages, the single forced convection device 120 is closed, and the cooling system cools down (air cooling or direct cooling) in a conventional manner, and the period is maintained at t 1. At the end of the pre-cooling phase, the temperature T1 of the fast-freezing chamber 110 or the item to be frozen should not be lower than the freezing point T2 of the item to be frozen itself.
(functional blocks such as a clock or a timer may be added to determine the time t1)
T2 is the freezing point temperature of the object to be frozen, half of which is lower than the freezing point (0 ℃) of water, so the pre-cooling stage realizes that the temperature of the object to be frozen is not lower than the freezing point temperature T2 by controlling the environment temperature in the quick freezing chamber to be more than 0 ℃. Wherein the temperature of the air needs to be detected by a temperature sensor.
Stage 2, supercooling stage.
The individual forced convection apparatus 120 is turned off during this phase and the other apparatus continues to operate according to phase 1, causing the temperature of the fast freezing compartment 110 or articles to be frozen to drop continuously or in stages and then to remain for a period of time up to T3 when the temperature of the fast freezing compartment 110 or articles to be frozen reaches T4.
The period of time for which the temperature field inside the article to be frozen is maintained may be made more uniform, or a lower supercooling temperature may be obtained, and ice crystal particles formed when supercooling is released may be made more uniform.
And 3, a quick freezing stage.
In this stage, the independent forced convection device 120 is opened, so that the cooling speed and temperature of the articles to be frozen are disturbed, the supercooling state of the articles to be frozen is released, a large amount of fine ice crystals are rapidly formed in the articles to be frozen, the mechanical damage of the articles to be frozen is reduced, and the time t7 is maintained in this stage. The item to be frozen is then continuously cooled to T5 for a period of time.
Referring to fig. 3, it can be seen that the supercooling temperature is raised from T4 to T2 (freezing point) after the convection device is turned on, which is a natural law, and then it is maintained at T2 (the temperature in the phase change process is constant, for example, the temperature is always 0 ℃ when water becomes ice), and after the convection device is turned on, the temperature is continuously lowered to T5, and the temperature is maintained at T5 for a period of time to ensure the uniformity of the object to be frozen at low temperature, so as to avoid the growth of ice crystals during the temperature raising process.
And 4, normally storing the to-be-frozen goods.
After the stage 3 is completed, the temperature of the fast freezing chamber 110 or the article to be frozen is controlled to be raised to T3, wherein T3 should be not higher than the freezing point T2 of the article to be frozen itself. At this time, fine and uniform granular ice crystals are distributed inside and outside the frozen object to be frozen, and the frozen object can be easily cut by a knife even if the frozen object is immediately cooked.
Referring to fig. 4, the method for controlling freezing of a refrigerator in the present embodiment may include:
step S401, putting the articles to be frozen into the quick freezing chamber 110, and starting to operate the refrigerating system; the operation can be performed by controlling the refrigeration system to start to operate by the control system in response to a user instruction;
step S402, entering a stage 1 pre-cooling stage, and normally cooling the quick freezing chamber 110;
step S403, recording the maintaining time t1 of the pre-cooling stage;
step S404, recording the temperature T of the article to be frozen;
step S405, judging whether t1 is greater than or equal to a, namely judging whether the maintaining time of the pre-cooling stage is greater than the cooling time of the pre-cooling stage; if yes, executing step S407, otherwise executing step S402;
step S406, judging whether T is less than or equal to T1; namely, judging whether the temperature T of the articles to be frozen is less than or equal to the end temperature (namely the set temperature) of the temperature reduction in the pre-cooling stage; if yes, executing step S407, otherwise executing step S402;
step S407, maintaining or slowing down the cooling speed;
step S408, judging whether T is equal to T4, namely judging whether the temperature T of the goods to be frozen is equal to the supercooling temperature of the goods to be frozen in the supercooling stage; if yes, executing steps S409 and S410, otherwise executing step S407;
step S409, recording the actual running time T2 when the temperature is reduced to T2;
step S410, stopping cooling and maintaining the temperature;
step S411, recording the actual running time T3 after the T4 is maintained in the supercooling phase;
step S412, judging whether T3 is greater than or equal to b, namely judging whether T3 is greater than or equal to the time when the temperature is operated to T4; if yes, go to step S414; if not, go to step S410;
step S413, judging whether t3-t2 is larger than or equal to c; i.e., whether the time difference between T3 and T2 is greater than or equal to the time for the subcooling phase to maintain T4; if yes, go to step S414; if not, go to step S410;
step S414, turning on the forced convection apparatus 120;
step S415, recording the actual running time T6 when the temperature of the articles to be frozen is reduced to the lowest temperature T5;
step S416, judging whether T is equal to T5, namely judging whether the temperature T of the to-be-frozen goods is equal to the lowest temperature reduced by forced convection of the to-be-frozen goods in the quick freezing stage; if yes, go to step S418, otherwise go to step S414;
step S417, judging whether T6 is greater than or equal to d, namely judging whether the actual running time of the article to be frozen reduced to the lowest temperature T5 is greater than or equal to the time when the temperature is reduced to T5 in the quick freezing stage; if yes, go to step S418, otherwise go to step S414;
step S418, stopping cooling and keeping the temperature stable;
step S419, recording the running time T7 when the temperature of the articles to be frozen is maintained at the end of T5;
step S420, judging whether t7-t6 is larger than or equal to f; that is, it is determined whether the difference between T7 and T6 is greater than or equal to the time that the fast freeze phase is maintained at T5; if yes, go to step S422, otherwise go to step S418;
step S421, judging whether the running time T7 when the temperature of the article to be frozen is maintained at the end of T5 is more than or equal to the running time e when the quick freezing stage is finished; if yes, go to step S422, otherwise go to step S418;
step S422, the forced convection apparatus 120 is turned off;
step S423, whether the temperature T of the article to be frozen is equal to the final temperature T3 of the article to be frozen; if yes, go to step S424, otherwise go to step S422;
in step S424, the temperature rise is stopped and the temperature is kept stable.
The embodiment of the invention provides a refrigerator with a quick freezing function and a control method thereof, based on the refrigerator 100 provided by the embodiment of the invention, the refrigerator 100 is provided with a quick freezing chamber 110, and a control system controls a refrigerating system to respectively carry out cooling, quick freezing and conventional refrigeration storage stages, so that supercooling unfreezing and supercooling release quick freezing of an object to be frozen can be realized, the freezing process of the object to be frozen is quicker, ice crystals are finer and more smooth, and cutting can be easily realized without unfreezing; meanwhile, the damage of cells of the object to be frozen is avoided, and the loss of nutrient substances in the freezing and unfreezing processes is reduced.
In addition, the refrigerator 100 provided in the embodiment of the present invention can also control the start and stop of the fan at different stages of the freezing process of the to-be-frozen object by setting the forced convection device 120, so as to respectively achieve supercooling-unfreezing and supercooling-releasing quick freezing of the to-be-frozen object.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (6)
1. A refrigerator, characterized by comprising: the quick freezing chamber has the function of quick freezing storage; the refrigerating system is used for storing the cold quantity required by the articles to be frozen in the quick freezing chamber; the control system controls the refrigerating system to rapidly freeze and store the articles to be frozen in the rapid freezing chamber: firstly, cooling, when the current temperature of the articles to be frozen in the quick freezing chamber is detected to be not less than the freezing temperature of the articles to be frozen and reaches a preset temperature, quickly freezing, and controlling the refrigerating system to carry out conventional refrigeration storage after the preset time; the control system is further used for controlling the refrigeration system to pre-cool at the beginning of the cooling and cooling stage, continuously or in stages, cooling the ambient temperature of the rapid freezing chamber or the temperature of the articles to be frozen to a temperature T1, then performing supercooling, and cooling the ambient temperature of the rapid freezing chamber or the temperature of the articles to be frozen to a temperature T4; wherein the temperature T1 is not less than the freezing temperature T2 of the object to be frozen, and T4 < T1; the control system is also used for controlling the ambient temperature of the quick freezing chamber or the temperature of the articles to be frozen to be raised to a temperature T3 in the normal refrigeration preservation stage, wherein T4 < T3 < T2; in the process of supercooling and relieving the articles to be frozen, the ambient temperature of the quick freezing chamber or the temperature of the articles to be frozen is increased from the temperature T4 to the temperature T2, is reduced to the temperature T5 after being maintained for a period of time, is maintained for a period of time by the T5, and is increased to the temperature T3 for conventional refrigeration storage, wherein T5 is less than T4.
2. The refrigerator of claim 1, wherein the refrigerating system includes a forced convection apparatus provided in the quick-freezing chamber; the control system is also used for starting the forced convection device to perform supercooling release on the goods to be frozen in the quick freezing stage.
3. The refrigerator of claim 2 wherein said forced convection means remains closed during said cool down and normal refrigerated storage.
4. A freezing control method of a refrigerator is characterized in that the refrigerator comprises the following steps: the quick freezing chamber has the function of quick freezing storage; the refrigerating system is used for storing the cold quantity required by the articles to be frozen in the quick freezing chamber; the control system controls the refrigerating system to carry out quick freezing storage on the articles to be frozen in the quick freezing chamber; the method comprises the following steps: control refrigerating system is right the quick freezing room treat freezing article and carry out quick freezing storage, it includes: cooling; if the current temperature of the articles to be frozen in the quick freezing chamber is detected to be not less than the freezing temperature of the articles to be frozen and reaches a preset temperature, quick freezing is carried out; controlling the refrigeration system to carry out conventional refrigeration storage after a preset time; the cooling comprises the following steps: pre-cooling by the refrigerating system, and continuously or in stages cooling the ambient temperature of the quick freezing chamber or the temperature of the articles to be frozen to a temperature T1; supercooling, and reducing the ambient temperature of the quick freezing chamber or the temperature of the articles to be frozen to a temperature T4; wherein the temperature T1 is not less than the freezing temperature T2 of the object to be frozen, and T4 < T1; the controlling the refrigeration system to perform normal refrigeration preservation after the preset time comprises the following steps: controlling the operation of the refrigeration system after a preset time to control the ambient temperature of the quick freezing chamber or the temperature of the articles to be frozen to be raised to a temperature T3, wherein T4 < T3 < T2; when the article to be frozen is overcooled and removed, the ambient temperature of the quick freezing chamber or the temperature of the article to be frozen is controlled to be increased from the temperature T4 to the temperature T2, the temperature is reduced to the temperature T5 after the temperature is maintained for a period of time, the temperature is increased to the temperature T3 after the temperature is maintained for a period of time by the temperature T5, the conventional refrigeration storage is carried out, and T5 is less than T4.
5. The method of claim 4, wherein the refrigeration system includes a forced convection device disposed in the rapid-freeze compartment; and when the quick freezing is carried out, starting the forced convection device to carry out supercooling release on the article to be frozen.
6. The method of claim 5, wherein said forced convection apparatus remains closed during said cool-down and conventional refrigerated storage.
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| CN111426116A (en) * | 2020-04-13 | 2020-07-17 | 珠海格力电器股份有限公司 | Fresh-keeping device with high fresh-keeping effect and control method thereof |
| CN112205563A (en) * | 2020-09-28 | 2021-01-12 | 中国科学院广州能源研究所 | Super-ice-temperature quick-frozen food fresh-keeping method |
| CN112797727A (en) * | 2021-01-05 | 2021-05-14 | 珠海格力电器股份有限公司 | Control method and device for low-temperature quick freezing of refrigerator, controller and refrigerator |
| CN115406151B (en) * | 2022-08-29 | 2023-09-05 | 珠海格力电器股份有限公司 | Instantaneous freezing control method, device and system for freezing chamber of refrigerator and refrigerator |
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