CN211120206U - A kind of refrigerator - Google Patents
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- CN211120206U CN211120206U CN201921501661.7U CN201921501661U CN211120206U CN 211120206 U CN211120206 U CN 211120206U CN 201921501661 U CN201921501661 U CN 201921501661U CN 211120206 U CN211120206 U CN 211120206U
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Abstract
The utility model discloses a refrigerator relates to freezing fresh-keeping technical field. The utility model discloses an implement cold wind proportional control to the freezing process of subcooling, the formation and the stable maintenance of the state of subcooling in the freezing process of food have been solved to the cold wind proportion of two kinds of different temperatures of the freezer that the freezing process of subcooling extracted and walk-in promptly, and the problem to food histocyte destruction that leads to with the ice crystallization is inhomogeneous to and the problem that food quality descends or breed the bacterium easily among the thawing process.
Description
Technical Field
The utility model relates to a freezing fresh-keeping technical field especially relates to a supercooling freezing method and refrigerator control method.
Background
With the improvement of living standard, the requirement of freshness of food materials for consumers is increasing. At present, the refrigeration and preservation technology for fruits and vegetables is more, and the effective preservation method for frozen foods is less, especially for meat foods. 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 gradually slowly crystallized towards the interior of the food. This generally presents two major problems: firstly, in the process of slowly freezing food, the food is frozen from the surface of the food, and the formed acicular ice crystals have destructive effect on histiocytes of the food, so that the juice loss of the frozen food is serious, and the food quality is obviously reduced; secondly, in the process of unfreezing the food, juice is lost from damaged histiocytes, so that the quality of the food is reduced, bacteria and microorganisms are easy to breed in the mode of heating and unfreezing, and the sanitary condition of the food is not optimistic.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a supercooling freezing method, a refrigerator and a refrigerator control method. The method comprises the steps of controlling the proportion of cold air in the supercooling freezing process, wherein the proportion of the cold air refers to the proportion of the cold air with two different temperatures of a freezing chamber and a refrigerating chamber which are extracted in the supercooling freezing process, so that the formation and the stable maintenance of a supercooling state in the food freezing process are realized, and the problem of damage to food tissue cells caused by nonuniform ice nucleus formation and nonuniform ice crystallization in the freezing process is solved; the food quality is reduced or bacteria are easy to breed in the unfreezing process.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
the utility model provides a pair of supercooling freezing method, it includes following stage:
a pre-cooling stage, cooling the storage articles to be frozen to a first temperature T1 which is not lower than the freezing point T2 of the storage articles within the time delta T1;
a supercooling phase, namely, reducing the temperature of the stored goods from the first temperature T1 to a fifth temperature T5 which is lower than the freezing point T2 of the stored goods within a time delta T2 and maintaining the temperature for a period of time delta T3;
a quick freezing stage, in which supercooling is released, and the stored goods are cooled from a fifth temperature T5 to a seventh temperature T7 within a time delta td;
a normal preservation stage, raising the temperature of the stored goods from the seventh temperature T7 to a third temperature T3 which is higher than the fourth temperature T4 but lower than the freezing point T2 of the stored goods for preservation;
and controlling the cold air proportion in the supercooling freezing process, wherein the cold air proportion refers to the mixing proportion of two cold air with different temperatures of the freezing chamber and the refrigerating chamber extracted in the supercooling freezing process.
The optimizable extraction of more cold air from the freezing chamber in the pre-cooling stage and the quick freezing stage; in the supercooling stage and the normal preservation stage, more cold air is extracted from the refrigerating chamber.
As an optimization, the cool air drawn from the freezing chamber and the refrigerating chamber is mixed before the supercooling freezing process is performed.
The optimization can be realized by respectively controlling the opening degrees of the air door of the freezing chamber and the air door of the refrigerating chamber to control the cold air proportion in the supercooling freezing process.
In the pre-cooling stage, the air door of the freezing chamber is opened to be larger or fully opened, and the air door of the refrigerating chamber is closed or reduced, so that the air outlet temperature of the quick freezing chamber is reduced to the first temperature T1 before the stored articles, and is maintained at the first temperature for a certain time until the temperature of the stored articles is reduced to be close to or reach the first temperature T1.
Above-mentioned can be optimized, when the storage article gets into the stage of subcooling, turn down the freezer air door, reduce the freezer convulsions proportion, reduce quick freezer air-out temperature and food temperature difference, make quick freezer slow cooling, the storage article is abundant supercooled, make the storage article temperature in delta T2 time continuous or stage reduce to fifth temperature T5 and maintain for a certain time delta T3, make the storage article temperature keep in fifth temperature T5 duration, control quick freezer cold wind proportion unchangeable, it is stable to keep the air-out temperature, maintain at sixth temperature T6 that is less than storage article fifth temperature T5.
The optimizable rapid freezing of the articles stored in the rapid freezing chamber is performed: the temperature of the stored goods is lowered in a multi-stage way in a quick freezing stage: the first stage is as follows: the supercooling is released, and the temperature of the stored goods is raised to the freezing point of the stored goods, namely a second temperature T2 within the time delta T4; and a second stage: controlling the temperature of the stored goods to be maintained at the freezing point T2 temperature delta T5 time of the stored goods; a third stage, the temperature of the stored goods is reduced to a seventh temperature T7 within the time delta T6 and is maintained for the time delta T7; in the process of controlling the rapid freezing of the stored articles, firstly closing or reducing the air door of the refrigerating chamber, opening the air door of the freezing chamber to quickly reduce the air outlet temperature of the rapid freezing chamber 2, increasing the temperature difference between the air outlet temperature of the rapid freezing chamber and the temperature of the stored articles, enabling the foods to enter the rapid freezing process until the temperature of the stored articles reaches a seventh temperature T7, stopping cooling operation, keeping the air outlet temperature of the rapid freezing chamber stable, and enabling the air outlet temperature to be an eighth temperature T8 lower than the seventh temperature T7 of the stored articles;
the above optimization is performed by closing or reducing the air door of the freezing chamber and opening the air door of the refrigerating chamber when the temperature of the stored articles enters the normal storage stage from the seventh temperature T7, so as to increase the air outlet temperature of the rapid freezing chamber, so that the stored articles are heated to the third temperature T3 which is lower than the second temperature T2 and higher than the fifth temperature, and are kept at the third temperature T3 for freezing storage, and at this time, the air outlet temperature of the rapid freezing chamber is the fourth temperature T4 which is lower than the third temperature T3.
The optimizable temperature is that the first temperature is 0 ℃ and T1 and T5 ℃, the second temperature is-5 ℃ and T2 and 0 ℃, the third temperature is-10 ℃ and T3 and 0 ℃, the fourth temperature is-20 ℃ and T4 and T352 ℃, the fifth temperature is-10 ℃ and T5 and-3 ℃, the sixth temperature is-20 ℃ and T6 and T5 ℃, the seventh temperature is-40 ℃ and T7 and T5 ℃, and the eighth temperature is-45 ℃ and T8 and T7 ℃.
The time is more than or equal to 1h and less than or equal to Δ t1 and less than or equal to 6h, the time is more than or equal to 1h and less than or equal to Δ t1 and less than or equal to 6h, the time is more than or equal to 0h and less than or equal to Δ t2 and less than or equal to 2h, the time is more than or equal to 0h and less than or equal to Δ t3 and less than or equal to 4h, and the time is; the time is more than or equal to 0h and less than or equal to 1h and less than or equal to 4h and less than or equal to 1h and less than or equal to 3h and less than or equal to 1h and less than or equal to 0h and less than or equal to 4h and t 5.
The utility model also provides a refrigerator, it is equipped with walk-in, quick-freezing room, freezer, wherein quick-freezing room is used for making the storage article realize the supercooling freezing, its characterized in that: the refrigerating chamber is provided with a first air door for extracting cold air from the refrigerating chamber, the freezing chamber is provided with a second air door for extracting cold air from the freezing chamber, the quick freezing chamber is provided with an air supply door, a first air path is formed between the first air door and the air supply door, and a second air path is formed between the second air door and the air supply door.
The refrigerator side wall can be optimized, an internal air supply duct is formed among the first air door, the second air door and the air supply door, and the first air duct and the second air duct are formed in the internal air supply duct.
The air supply door adopts the air guide plate capable of changing the air guide angle.
The refrigerating chamber (1), the quick freezing chamber (2) and the freezing chamber (3) are sequentially adjacent from top to bottom. The temperature range of the rapid freezing chamber is more than or equal to T and is more than or equal to 18 DEG CFast-acting toyNot more than 0 ℃, and the temperature range T of the refrigerating chamberTibetan medicineThe temperature range T of the freezing chamber is more than or equal to 4 DEG CJelly made from plant≤18℃。
The utility model also provides a refrigerator control method, its characterized in that: the method comprises the following control steps:
s1: pre-cooling the articles stored in the quick freezing chamber: opening a freezing chamber air door to be large or fully opened, closing or reducing a refrigerating chamber air door to ensure that the temperature of stored articles is reduced to a first temperature T1 within the time delta T1, wherein the first temperature T1 is higher than the freezing point temperature T2 of the stored articles, at the stage, the air outlet temperature of the quick freezing chamber is reduced to the first temperature T1 before the stored articles, and when the air outlet temperature reaches T1, the temperature is maintained for a certain time until the temperature of the stored articles is reduced to be close to or reach the first temperature T1;
s2, supercooling the stored goods in the quick freezing chamber: the air door of the freezing chamber is reduced, the air draft ratio of the freezing chamber is reduced, the temperature difference between the air outlet temperature of the quick freezing chamber and food is reduced, the quick freezing chamber is slowly cooled, stored articles are fully supercooled, the temperature of the stored articles is continuously or stepwise reduced to a fifth temperature T5 within the time of delta T2 and is maintained for a certain time of delta T3, the cold air ratio of the quick freezing chamber is controlled to be unchanged during the period of keeping the temperature of the stored articles at the fifth temperature T5, the air outlet temperature is kept stable, and the sixth temperature T6 lower than the fifth temperature T5 of the stored articles is maintained;
s3, rapidly freezing the articles stored in the rapid freezing chamber: increase the temperature difference between the air outlet temperature of the quick freezing chamber and the temperature of the stored articles, so that the food enters into the quick freezing stage: and closing or turning down the air door of the refrigerating chamber, opening the air door of the freezing chamber to reduce the air outlet temperature of the quick freezing chamber until the temperature of the stored articles reaches the seventh temperature T7, stopping cooling operation, keeping the air outlet temperature stable, and keeping the air outlet temperature at the eighth temperature T8 lower than the seventh temperature T7 of the stored articles.
S4, performing normal preservation on the articles stored in the quick freezing chamber: when the temperature of the stored articles reaches the seventh temperature T7, the stored articles enter a normal storage stage, the air door of the freezing chamber is closed or adjusted to be small, the air door of the refrigerating chamber is opened to be large, the air outlet temperature of the quick freezing chamber is increased, the stored articles are heated to a third temperature T3 which is lower than the second temperature T2 and higher than the fifth temperature, the stored articles are maintained at the third temperature T3, normal storage is carried out, and the air outlet temperature of the quick freezing chamber is stabilized at a fourth temperature T4 which is lower than the third temperature T3.
The optimizable temperature is that the first temperature is 0 ℃ and T1 and T5 ℃, the second temperature is-5 ℃ and T2 and 0 ℃, the third temperature is-10 ℃ and T3 and 0 ℃, the fourth temperature is-20 ℃ and T4 and T352 ℃, the fifth temperature is-10 ℃ and T5 and-3 ℃, the sixth temperature is-20 ℃ and T6 and T5 ℃, the seventh temperature is-40 ℃ and T7 and T5 ℃, and the eighth temperature is-45 ℃ and T8 and T7 ℃.
The optimizable temperature is 0 ℃ or more and T1 or more and 2 ℃ or less, the second temperature is-3 ℃ or more and T2 or more and-1 ℃ or more, the third temperature is-7 ℃ or more and T3 or more and-3 ℃ or more, the fourth temperature is-10 ℃ or more and T4 or more and-5 ℃ or more, the fifth temperature is-7 ℃ or more and T5 or more and-5 ℃ or more, the sixth temperature is-10 ℃ or more and T6 or more and-7 ℃ or more and the seventh temperature is-7 ℃ or more and T7 or more and-3 ℃ or more, and the eighth temperature is-10 ℃ or more and T8 or more and-5 ℃ or more.
The time is more than or equal to 1h and less than or equal to Δ t1 and less than or equal to 4h, the time is more than or equal to 1h and less than or equal to Δ t2 and less than or equal to 2h, the time is more than or equal to 1h and less than or equal to Δ t3 and less than or equal to 2h, and the time is more than or equal to 3h and less than or equal to Δ td and; the time is more than or equal to 2h and less than or equal to Δ t1 and less than or equal to 4h, the time is more than or equal to 1h and less than or equal to Δ t2 and less than or equal to 2h, the time is more than or equal to 1h and less than or equal to Δ t3 and less than or equal to 2h, and the time is more than or equal to 4h and less than or; the time is more than or equal to 0h and less than or equal to 0.5h and less than or equal to 0h and less than or equal to 2h and less than or equal to Δ t5 and less than or equal to 3h, the time is more than or equal to 1h and less than or equal to 2h and less than or equal to 1h and less than or equal to Δ t6 and less than or equal to 2h and less than or equal to 1.
The utility model discloses an implement cold wind proportional control to the freezing process of subcooling, the cold wind proportion of two kinds of different temperatures of the freezer that extract promptly and walk-in realizes following beneficial effect: 1. the temperature difference between the refrigerating chamber and the freezing chamber can be utilized to realize the adjustment of the air supply temperature of the quick freezing chamber; 2. the supercooling state of the food is realized and stably maintained by adjusting the air supply temperature of the quick freezing chamber; 3. the food is quickly released from the supercooling state and is quickly frozen by adjusting the air supply temperature of the quick freezing chamber.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely some embodiments of the present disclosure, and other drawings may be derived from those drawings by those of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic view of a refrigerator according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating control of the food temperature and the outlet air temperature of the rapid freezing chamber according to an embodiment of the present invention;
FIG. 3 illustrates a method for controlling a refrigerator according to any embodiment of the present invention;
in the figure:
1-a refrigerating chamber; 11-a first damper; 2-quick freezing chamber; 21-an air supply door; 3-freezing chamber; 31-a second damper; 4-compressor
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two, but does not exclude the presence of at least one.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
The utility model realizes the adjustable air supply temperature of the quick freezing chamber by implementing the cold air proportional control to the supercooling freezing process, namely the cold air proportion of two different temperatures of the freezing chamber and the refrigerating chamber, and utilizing the temperature difference between the refrigerating chamber and the freezing chamber; the supercooling state of the food is realized and stably maintained by adjusting the air supply temperature of the quick freezing chamber; the problem of the formation of ice core is inhomogeneous in freezing process to the damage of food histocyte that ice crystallization is inhomogeneous leads to is solved to and the problem of the refrigeration in-process food quality decline or breed bacterium easily.
The refrigerator is taken as an example below, and the design idea of the book utility model is explained:
example 1:
the present embodiment provides a refrigerator as shown in fig. 1, which is provided with a refrigerating chamber 1, a quick-freezing chamber 2, and a freezing chamber 3, which are adjacent to each other in sequence from top to bottom, wherein the quick-freezing chamber 2 is used for supercooling and freezing stored goods. The refrigerating chamber 1 is provided with a first air door 11 for extracting cold air from the refrigerating chamber 1, the freezing chamber 3 is provided with a second air door 31 for extracting cold air from the freezing chamber 3, the quick freezing chamber 2 is provided with an air supply door 21, a first air path is formed between the first air door 11 and the air supply door 21, and a second air path is formed between the second air door 31 and the air supply door 21.
Preferably, the refrigerator side wall forms an internal air supply duct among the first damper 11, the second damper 31, and the air supply door 21, and the first duct and the second duct are formed in the internal air supply duct.
Preferably, the air supply door adopts an air deflector capable of changing the air guide angle.
The cool air drawn from the freezing chamber 3 and the refrigerating chamber 1 is mixed before the supercooling freezing process is performed. The air distribution ratio is a mixing ratio of the amount of cold air drawn from the freezing chamber 3 to the amount of cold air drawn from the refrigerating chamber 1, and the outlet air temperature of the rapid freezing chamber is the air temperature of the mixed air fed into the rapid freezing chamber. The control of the air distribution ratio is controlled by controlling the opening degrees of the second damper 31 for extracting cold air from the freezing chamber 3 and the first damper 11 for extracting cold air from the refrigerating chamber 1.
Preferably, the temperature of the rapid freezing chamber 2 is in the range of-18 ℃ T ≦ TFast-acting toyNot more than 0 ℃, and the temperature range T of the refrigerating chamber 1Tibetan medicineThe temperature range T of the freezing chamber (3) is more than or equal to 4 DEG CJelly made from plantAt 18 ℃ or less, to better realize the control of the supercooling freezing process by extracting cold air from the freezing chamber 3 and the refrigerating chamber 1.
The utility model discloses from the top down sets gradually walk-in 1, fast freezing room 2, freezer 3, corresponds walk-in, fast freezing room, freezer by high to low temperature, makes the utility model discloses when utilizing cold wind from the 3 extraction of freezer and carrying out different supercooling process control in the different stages of supercooling process from the cold wind of walk-in 1 extraction, can not lead to the tainting of three room to take place because steam rises, also played energy-conserving effect. Furthermore, in the supercooling freezing process, two cold air with different temperatures of the freezing chamber and the refrigerating chamber are extracted and mixed, so that a supercooling state and stable maintenance are formed in the food freezing process, and the problems of damage to food tissue cells caused by nonuniform ice nucleus formation and nonuniform ice crystallization in the freezing process, and food quality reduction or easy bacteria breeding in the unfreezing process are solved.
Example 2:
the utility model discloses still provide a supercooling freezing method embodiment, generally speaking include the following stage:
(1) a pre-cooling stage, cooling the storage articles to be frozen to a first temperature T1 which is not lower than the freezing point T2 of the storage articles within the time delta T1;
(2) a supercooling phase, namely, reducing the temperature of the stored goods from the first temperature T1 to a fifth temperature T5 which is lower than the freezing point T2 of the stored goods within a time delta T2 and maintaining the temperature for a period of time delta T3;
(3) a quick freezing stage, in which supercooling is released, and the stored goods are cooled from a fifth temperature T5 to a seventh temperature T7 within a time delta td;
(4) a normal preservation stage, raising the temperature of the stored goods from the seventh temperature T7 to a third temperature T3 which is higher than the fourth temperature T4 but lower than the freezing point T2 of the stored goods for preservation;
and performing cold air proportion control on the supercooling freezing process, wherein the cold air proportion refers to the mixing proportion of two cold air with different temperatures of the freezing chamber 3 and the refrigerating chamber 1 extracted in the supercooling freezing process:
more cold air is extracted from the freezing chamber 3 in the pre-cooling stage and the quick freezing stage;
in the supercooling stage and the normal storage stage, more cold air is drawn from the refrigerating chamber 1.
Specifically, it can be optimized that the rapid freezing stage adopts continuous cooling or multi-stage cooling, and the rapid freezing stage adopts multi-stage cooling: the first stage is as follows: the supercooling is released, and the temperature of the stored goods is raised to the freezing point of the stored goods, namely a second temperature T2 within the time delta T4; and a second stage: controlling the temperature of the stored goods to be maintained at the freezing point T2 temperature delta T5 time of the stored goods; and a third stage, the temperature of the stored goods is reduced to a seventh temperature T7 within the time delta T6 and is maintained for the time delta T7.
The following figures, with reference to fig. 1 to 3, take the refrigerator provided in embodiment 1 as an example to describe in detail the preferred embodiment of the control method for supercooling freezing of the present invention:
s1: pre-cooling the articles stored in the quick freezing chamber: opening a damper of a freezing chamber 3 to be large or fully opened, closing or reducing a damper of a refrigerating chamber 1 to reduce the temperature of stored articles to a first temperature T1 within the time delta T1, wherein the first temperature T1 is higher than the freezing point temperature T2 of the stored articles, at the stage, the air outlet temperature of a quick freezing chamber 2 is reduced to the first temperature T1 before the stored articles, and when the air outlet temperature reaches T1, the temperature is maintained at the temperature for a certain time until the temperature of the stored articles is reduced to be close to or reach the first temperature T1;
at this stage, the stored goods to be frozen are placed in a quick freezing chamber for pre-cooling treatment, and the temperature of the food is rapidly reduced. Preferably, the first temperature is greater than or equal to 0 ℃ and less than or equal to T1 and less than or equal to 5 ℃, the second temperature is greater than or equal to-5 ℃ and less than or equal to T2 and less than or equal to 0 ℃, and the time is greater than or equal to 1h and less than or equal to Δ T1 and less than or equal to 6 h; further preferably, the first temperature is 0 ℃ to T1 ℃ to 2 ℃, and the second temperature is-3 ℃ to T2 ℃ to-1 ℃; the time is more than or equal to 2h and less than or equal to 4h and delta t 1;
s2, supercooling the stored goods in the quick freezing chamber: the air door of the freezing chamber 3 is reduced, the air draft ratio of the freezing chamber is reduced, the air outlet temperature of the quick freezing chamber and the temperature difference of food are reduced, the quick freezing chamber 2 is slowly cooled, stored articles are fully supercooled, the temperature of the stored articles is continuously or stepwise reduced to a fifth temperature T5 within the time of delta T2 and is maintained for a certain time of delta T3, the cold air ratio of the quick freezing chamber is controlled to be unchanged while the temperature of the stored articles is maintained at the fifth temperature T5, the air outlet temperature is kept stable, and the sixth temperature T6 lower than the fifth temperature T5 of the stored articles is maintained;
at this stage, the stored goods to be frozen are made to be in a supercooled state and kept in the supercooled state for a period of time, which is favorable for the formation of uniform ice nuclei inside and outside the stored goods.
Preferably, the fifth temperature is-10 ℃ and T5 and T353 ℃, the sixth temperature is-20 ℃ and T6 and T355 ℃, the time 0h and Δ T2 are not less than 2h, and the time 0h and Δ T3 are not less than 4 h; further preferably, the fifth temperature is-7 ℃ and T5 and T355 ℃, the sixth temperature is-10 ℃ and T6 and T7 ℃, the time 1h and Δ T2 are not less than 2h, and the time 1h and Δ T3 are not less than 2 h.
S3, rapidly freezing the articles stored in the rapid freezing chamber within the time delta td: the temperature difference between the air outlet temperature of the quick freezing chamber and the temperature of the stored articles is increased, the supercooling is removed, and the food enters a quick freezing stage. Preferably, the supercooling release mode in the quick freezing stage may be to close the air door of the refrigerating chamber 1, close or turn down the air door of the refrigerating chamber 1, and open the air door of the freezing chamber 3 to reduce the air outlet temperature of the quick freezing chamber 2 until the temperature of the stored goods reaches the seventh temperature T7, stop the cooling operation, and keep the air outlet temperature stable, where the air outlet temperature is the eighth temperature T8 lower than the seventh temperature T7 of the stored goods;
the ice nuclei distributed uniformly and rapidly at each part of the stored goods at the stage grow uniformly and rapidly to form granular ice crystals, so that the damage to the tissues of the stored goods is avoided, the juice loss rate of the stored goods is reduced, and the storage quality of the frozen stored goods is improved.
Preferably, the seventh temperature is-40 ℃ and T7 and T5 ℃, the eighth temperature is-45 ℃ and T8 and T7 ℃, and the rapid freezing time is 3h and Δ td and 6 h; more preferably, the seventh temperature is-7 ℃ and T7 ℃ and-3 ℃, and the eighth temperature is-10 ℃ and T8 ℃ and-5 ℃; delta td is more than or equal to 4h and less than or equal to 6h, and the optimization of the parameters ensures that the supercooling is carried out at a better cooling speed, thereby not only ensuring the sufficient supercooling, but also avoiding the energy waste and the overlong freezing time caused by overlong supercooling time.
Preferably, the rapid freezing stage is a multi-stage cooling stage, comprising three stages: the first stage is as follows: the supercooling is firstly released within the time delta T4 so that the temperature of the stored goods is raised to the freezing point of the stored goods, namely a second temperature T2; and a second stage: controlling the temperature of the stored goods to be maintained at the freezing point T2 delta T5 time of the stored goods; and in the third stage, the temperature of the stored goods is reduced to a seventh temperature T7 in the time of delta T6 and is maintained for the time of delta T7. Preferably, 0h is less than or equal to delta t4 is less than or equal to 1h, 1h is less than or equal to delta t5 is less than or equal to 4h, 1h is less than or equal to delta t6 is less than or equal to 3h, and 0h is less than or equal to delta t7 is less than or equal to 4 h. More preferably, 0h is less than or equal to Δ t4 is less than or equal to 0.5h, 2h is less than or equal to Δ t5 is less than or equal to 3h, 1h is less than or equal to Δ t6 is less than or equal to 2h, and the time is less than or equal to 1h and less than or equal to Δ t7 is less than or equal to 2 h. The optimization of the parameters enables the quick freezing stage to be carried out at a better cooling speed, so that the quick freezing is ensured, and the phenomena of reduction of freezing quality and cracking on the surface of an article caused by over-quick freezing are avoided.
S4, performing normal preservation on the articles stored in the quick freezing chamber: when the temperature of the stored articles reaches the seventh temperature T7, the stored articles enter a normal storage stage, the air door of the freezing chamber 3 is closed or adjusted to be small, the air door of the refrigerating chamber 1 is opened to be large, the air outlet temperature of the quick freezing chamber is increased, the stored articles are heated to a third temperature T3 which is lower than the second temperature T2 and higher than the fifth temperature, the stored articles are maintained at the third temperature T3, and the stored articles are frozen and stored, and the air outlet temperature of the quick freezing chamber is stabilized at a fourth temperature T4 which is lower than the third temperature T3.
After the stored goods in the supercooled state are preserved, fine and uniform granular ice crystals are distributed inside and outside, so that the stored goods can be easily cut off by a knife even if the stored goods are cooked immediately. Preferably, the third temperature is between-10 ℃ and T3 and 0 ℃, and the fourth temperature is between-20 ℃ and T4 and-2 ℃. Further preferably, the third temperature is between-7 ℃ and T3 and-3 ℃, and the fourth temperature is between-10 ℃ and T4 and-5 ℃. The temperatures are considered to be matched with the plurality of supercooling freezing processes and the cooling speed, so that the supercooling freezing effect is further ensured, and the energy waste is avoided.
Preferably, the refrigerator of the present embodiment is provided with a controller to implement the above control.
A refrigerating chamber and a freezing chamber are arranged in a common refrigerator, the temperature of the refrigerating chamber is about 4 ℃, and the temperature of the freezing chamber is about-18 ℃; the supercooling state of the food in the freezing and freezing process is formed, the temperature is usually between-18 ℃ and 4 ℃, therefore, the utility model discloses consider to utilize the difference in temperature of refrigerating chamber and freezing chamber, realize the adjustable of the air supply temperature of quick freezing chamber to make the food form and stably keep longer supercooling state. Specifically, the utility model discloses an implement cold wind proportional control and temperature, time fine management to the freezing process of subcooling, realize more excellent subcooling refrigeration effect:
1. the temperature difference between the refrigerating chamber and the freezing chamber can be utilized to realize the adjustment of the air supply temperature of the quick freezing chamber;
2. the supercooling state of the food is realized and stably maintained by adjusting the air supply temperature of the quick freezing chamber;
3. the food is quickly released from the supercooling state and is quickly frozen by adjusting the air supply temperature of the quick freezing chamber.
4. Food is at freezing in-process, process the utility model discloses supercooling treatment can reduce the destruction of ice crystal to food cell tissue to reduce the juice loss rate of food, simultaneously because food inside has formed even and less ice crystal, consequently need not to unfreeze, can directly the stripping and slicing culinary art.
It should be noted that:
1) in the control method of the refrigerator in this embodiment, the freezing point means a phase transition temperature at which a liquid substance in the stored goods such as food is changed from a liquid state to a solid state.
2) tn is a certain time node, and Δ t represents the time difference Δ t between two time nodes: Δ t1 ═ t 1-0; Δ t2-t 2-t 1; Δ t3-t 3-t 2; Δ t4-t 4-t 3; Δ t5-t 5-t 4; Δ t6-t 6-t 5; Δ t7-t 7-t 6; Δ td ═ t6-t 3. The time difference Δ t may be preset by the refrigerator controller, or may be monitored by a timer, and the specific monitoring mode may be realized by directly timing the time difference, or by monitoring the time progress points t1, t2, t3, t4, t5, t6, and t 7.
The time may be determined by temperature control entirely without being preset or directly controlled.
3) Tn denotes the temperature of the stored goods at a certain stage node. The control temperature Tn of the stage node in the method steps described in the application can be controlled by monitoring the temperature of the stored articles, can also be controlled by indirectly monitoring the temperature of the freezing chamber 3, and can also be controlled by indirectly monitoring the refrigeration time. The monitoring means of specific temperature can be through the temperature of temperature sensor direct monitoring storage article, because the utility model discloses the point of this application does not lie in specifically monitoring the temperature through what means, consequently the utility model discloses do not do special restriction to the monitoring means, as long as can realize each cooling stage the temperature control of storage article can.
First temperature T1: pre-cooling the target temperature, wherein the value range is [ 0 ℃ and 5 ℃, and the preferred value is [ 0 ℃ and 2 ℃;
second temperature T2: storing the freezing point temperature of the articles, wherein the value range is between 5 ℃ below zero and 0 ℃, and the preferred value is between 3 ℃ below zero and 1 ℃;
third temperature T3: the long-term storage temperature of the stored articles is in the range of (minus 10 ℃ and 0 ℃), and the preferred value is (minus 7 ℃ and minus 3 ℃);
fourth temperature T4: the air-out temperature of the long-term storage life is required to be more than T4 and less than T3, the value range is between 20 ℃ below zero and 2 ℃ below zero, and the optimal value is between 10 ℃ below zero and 5 ℃ below zero;
fifth temperature T5: the supercooling temperature of the stored goods is in the range of minus 10 ℃ and minus 3 ℃, and the optimal value is in the range of minus 7 ℃ and minus 5 ℃;
sixth temperature T6: the air outlet temperature in the supercooling period is required to be more than T6 and less than T5, the value range is between 20 ℃ and 5 ℃, and the optimal value is between 10 ℃ and 7 ℃;
seventh temperature T7: the freezing temperature is in the range of-40 deg.C and-5 deg.C, preferably in the range of-7 deg.C and-3 deg.C
Eighth temperature T8: the air outlet temperature in the freezing period is required to be T8 less than T7, the value range is between 45 ℃ and 7 ℃, and the preferred value is between 10 ℃ and 5 ℃.
4) The supercooling freezing process is used by implementing a cold air proportion control means, and the matching use of other means is not limited, such as the matching use of a compressor 4, cold air flow, cold air temperature and cooling time.
5) The freezing chamber 3 of the present invention is adapted to be made as a single quick freezing chamber 2 and is designed between the conventional refrigerating chamber 1 and the freezing chamber 3. The refrigerating chamber 1 is above the quick-freezing chamber 2, and the freezing chamber 3 is below the quick-freezing chamber 2.
6) The utility model provides a refrigerator covers all occasions that have freezing demand such as domestic refrigerator, industry refrigerator, and its storage article do not only confine food to, also can be other products, for example corpse. The utility model discloses preferred is meat storage article, for example meat products such as beef, chicken, flesh of fish.
To sum up, the utility model provides a supercooling freezing method and refrigerator control method, which relates to the technical field of freezing and fresh-keeping. And (2) implementing cold air proportion control in the supercooling freezing process, wherein the cold air proportion refers to two cold air proportions with different temperatures of a freezing chamber and a refrigerating chamber extracted in the supercooling freezing process: in the pre-cooling stage and the quick freezing stage, more cold air is extracted from the freezing chamber; in the supercooling stage and the normal preservation stage, more cold air is extracted from the refrigerating chamber. The temperature difference between the refrigerating chamber and the freezing chamber can be utilized to realize the adjustment of the air supply temperature of the quick freezing chamber; the supercooling state of the food is realized and stably maintained by adjusting the air supply temperature of the quick freezing chamber; the food is quickly released from the supercooling state and is quickly frozen by adjusting the air supply temperature of the quick freezing chamber. The problem of damage to food tissue cells caused by non-uniform ice nucleus formation and non-uniform ice crystallization in the freezing process and the problem of food quality reduction or easy bacterial breeding in the unfreezing process are avoided.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the disclosure is not limited to the precise construction, arrangement of parts, or methods of operation described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (5)
1. A refrigerator, it is equipped with walk-in (1), fast freezing room (2), freezer (3), wherein fast freezing room (2) are used for making the article of storage realize the supercooling freezing, its characterized in that: freezer (1) disposes one and is used for extracting first air door (11) of freezer (1) cold wind, freezer (3) dispose one and are used for extracting second air door (31) of freezer (3) cold wind, and fast freezer (2) disposes one supply-air door (21), form first wind path between first air door (11) and supply-air door (21), form the second wind path between second air door (31) and supply-air door (21).
2. The refrigerator of claim 1, wherein: the refrigerator side wall forms an internal air supply duct among the first air door (11), the second air door (31) and the air supply door (21), and the first air duct and the second air duct are formed in the internal air supply duct.
3. The refrigerator of claim 2, wherein: the air supply door adopts an air deflector capable of changing the air guide angle.
4. The refrigerator of claim 3, wherein: the refrigerating chamber (1), the quick freezing chamber (2) and the freezing chamber (3) are adjacent in sequence from top to bottom.
5. The refrigerator of claim 4, wherein: the temperature range of the rapid freezing chamber (2) is more than or equal to T under minus 18 DEG CFast-acting toyThe temperature of the refrigerating chamber (1) is less than or equal to 0 DEG CTibetan medicineThe temperature range T of the freezing chamber (3) is more than or equal to 4 DEG CJelly made from plant≤18℃。
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| CN201921501661.7U CN211120206U (en) | 2019-09-10 | 2019-09-10 | A kind of refrigerator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921501661.7U CN211120206U (en) | 2019-09-10 | 2019-09-10 | A kind of refrigerator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671878A (en) * | 2019-09-10 | 2020-01-10 | 珠海格力电器股份有限公司 | Supercooling freezing method, refrigerator and refrigerator control method |
| CN112460897A (en) * | 2020-12-04 | 2021-03-09 | 珠海格力电器股份有限公司 | Refrigerator and control method of instant freezing chamber thereof |
-
2019
- 2019-09-10 CN CN201921501661.7U patent/CN211120206U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671878A (en) * | 2019-09-10 | 2020-01-10 | 珠海格力电器股份有限公司 | Supercooling freezing method, refrigerator and refrigerator control method |
| CN110671878B (en) * | 2019-09-10 | 2023-11-21 | 珠海格力电器股份有限公司 | Supercooling freezing method, refrigerator and refrigerator control method |
| CN112460897A (en) * | 2020-12-04 | 2021-03-09 | 珠海格力电器股份有限公司 | Refrigerator and control method of instant freezing chamber thereof |
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