CN114264103A - Refrigerator and control method thereof - Google Patents
Refrigerator and control method thereof Download PDFInfo
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- CN114264103A CN114264103A CN202111656823.6A CN202111656823A CN114264103A CN 114264103 A CN114264103 A CN 114264103A CN 202111656823 A CN202111656823 A CN 202111656823A CN 114264103 A CN114264103 A CN 114264103A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/85—Food storage or conservation, e.g. cooling or drying
Abstract
The invention discloses a refrigerator and a control method thereof. The refrigerator comprises a refrigerating chamber, a micro-freezing chamber, a refrigerating chamber evaporator and a freezing chamber evaporator; the air inlet of the refrigerating chamber is communicated with the refrigerating chamber evaporator through an air inlet duct, and the air outlet of the refrigerating chamber is communicated with the refrigerating chamber evaporator through an air return duct; the micro-freezing chamber comprises a storage chamber, a first chamber and a second chamber which are respectively communicated with the storage chamber, the storage chamber is provided with a first air inlet communicated with an outlet of the first chamber and a second air inlet communicated with an outlet of the second chamber, an inlet of the first chamber is communicated with a return air duct of the refrigerating chamber, and an inlet of the second chamber is communicated with an evaporator of the freezing chamber; the air inlet of the freezing chamber is communicated with the freezing chamber evaporator through an air inlet duct, and the air outlet of the freezing chamber is communicated with the freezing chamber evaporator through an air return duct; a damper assembly comprising a first damper and a second damper; and the fan assembly comprises a first fan arranged at the inlet of the first chamber and a second fan arranged at the inlet of the second chamber.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to a refrigerator and a control method thereof.
Background
At present, the traditional freezing preservation is to store the meat below the freezing point, so that more than 80% of water in the meat is frozen, and the infection of microorganisms and the oxidation of fat are prevented. The micro-freezing preservation is a preservation technology of controlling the storage temperature at the freezing point of organisms and a temperature band 1-2 ℃ below the freezing point. The basic principle is that the low temperature is utilized to inhibit the propagation of microorganisms and the activity of enzymes, and in a slightly frozen state, partial water in the microorganisms can be frozen, the physiological and biochemical reactions of cells of the microorganisms are changed, the physiological activities of the microorganisms are inhibited, even the microorganisms are dormant or dead, and meat and aquatic products can be kept from being rotted and deteriorated for a long time. Meanwhile, most of the slightly frozen state Xia food is in an unfrozen state, so that the generated ice crystals are reduced to destroy cells, the fresh-keeping effect is good, thawing is not needed when the Xia food is eaten, the nutrition loss is reduced, and the food quality is kept. Compared with the traditional freezing, the micro-freezing preservation has the following advantages: the generation of ice crystals can be reduced, the mechanical damage of the ice crystals to products is reduced, and the storage life is prolonged; the food is not required to be unfrozen when being eaten, so that the juice loss caused by unfreezing is reduced, and the original quality of the food is kept; the refrigerator does not need to be kept in a low-temperature state all the time, refrigeration is reduced, and energy consumption is reduced. It is therefore desirable to provide a refrigerator that can slightly freeze food.
Disclosure of Invention
In view of the above, the invention discloses a refrigerator and a control method thereof, which are used for at least solving the problem that the prior art cannot slightly freeze food.
In order to achieve the above object, the invention adopts the following technical scheme:
a first aspect of the present invention discloses a refrigerator, including: the refrigerating chamber evaporator corresponds to the refrigerating chamber;
the refrigerating chamber is provided with an air inlet duct and an air return duct; preferably, the air inlet of the refrigerating chamber is communicated with the chamber/air channel where the refrigerating chamber evaporator is located through a refrigerating chamber air inlet channel, and the air outlet of the refrigerating chamber is communicated with the chamber/air channel where the refrigerating chamber evaporator is located through a refrigerating chamber air return channel;
the micro-freezing chamber comprises: the refrigerator comprises a storage chamber, a first chamber and a second chamber, wherein the first chamber and the second chamber are respectively communicated with the storage chamber;
the air door assembly comprises a first air door arranged at the first air inlet and a second air door arranged at the second air inlet;
and the fan assembly comprises a first fan arranged at the inlet of the first chamber and a second fan arranged at the inlet of the second chamber.
Further optionally, the refrigerator further comprises: a freezing chamber and a refrigerating chamber are arranged in the freezing chamber,
the freezer is by freezing wind channel provides cold wind, wherein: the air inlet of the freezing chamber is communicated with the freezing air channel through a freezing chamber air inlet air channel, and the air outlet of the freezing chamber is communicated with the freezing air channel through a freezing chamber return air channel.
The invention discloses a control method based on the refrigerator, which comprises the following steps: performing a micro-freezing process of the food product after the micro-freezing procedure is initiated by the refrigerator, wherein the micro-freezing process of the food product comprises:
a freezing storage stage: introducing cold air into the micro-freezing chamber through the first chamber to cool the food, storing cold air in the second chamber, and entering a rapid freezing and temperature storing stage when the temperature of the cold air in the second chamber reaches a first set temperature;
the rapid freezing and temperature storage stage: stopping introducing the refrigerating air into the micro-freezing chamber and storing the refrigerating air, introducing the freezing air into the micro-freezing chamber and controlling the cooling rate of the micro-freezing chamber and the cooling rate of the food in the micro-freezing chamber; monitoring the temperature of the food in the micro-freezing chamber, and entering a quick temperature return stage after the temperature of the food is reduced to a first temperature;
the quick temperature return stage comprises: stopping introducing the freezing air into the micro-freezing chamber and introducing the refrigerating air into the micro-freezing chamber to heat the micro-freezing chamber; monitoring the temperature of the food in the micro-freezing chamber, and entering a fresh-keeping storage stage when the temperature of the food is raised to a second temperature;
the fresh-keeping storage stage: the supply of cold to the micro-freezing chamber is controlled to maintain the temperature of the food at the second temperature.
Further optionally, the introducing of the cold air into the micro-freezing chamber through the first chamber to cool the food and storing the cold air in the second chamber includes:
setting the set temperature of the micro-freezing chamber to a first set temperature;
opening a first air door, and controlling a first fan to rotate according to a first preset rotating speed so as to convey refrigerating air to a storage chamber;
and closing the second air door, and controlling the second fan to rotate according to a second preset rotating speed so as to store the cold air in the second chamber.
Further optionally, the introducing of the cooling air into the micro-freezing chamber and controlling of the cooling rate of the micro-freezing chamber and the cooling rate of the food in the micro-freezing chamber includes:
controlling the cooling rate of the micro-freezing chamber to cool the temperature of the micro-freezing chamber to the first set temperature within a first preset time;
controlling the rotating speed of a second fan to reduce the temperature of the food to the first temperature within a second preset time;
the first set temperature is lower than the first temperature, and the first preset time is shorter than the second preset time.
Further optionally, the first set temperature ranges from-70 ℃ to-80 ℃; the first temperature is in the range of-1 ℃ to-5 ℃.
Further optionally, the introducing of the cooling air into the micro-freezing chamber and controlling of the cooling rate of the micro-freezing chamber and the cooling rate of the food in the micro-freezing chamber further comprises:
detecting the temperature of the cold air in the storage chamber;
if the temperature of the cold air at the current moment is lower than a first preset temperature, controlling the rotating speed of the second fan within a first rotating speed interval;
if the temperature of the cold air at the current moment is between the first preset temperature and the second preset temperature, controlling the rotating speed of the second fan within a second rotating speed interval;
if the temperature of the cold air at the current moment is higher than a second preset temperature, controlling the rotating speed of the second fan within a third rotating speed interval;
the upper limit value of the first rotating speed interval is less than or equal to the lower limit value of the second rotating speed interval, and the upper limit value of the second rotating speed interval is less than or equal to the lower limit value of the third rotating speed interval.
Further optionally, the introducing of the cooling air into the micro-freezing chamber and controlling of the cooling rate of the micro-freezing chamber and the cooling rate of the food in the micro-freezing chamber further comprises: the method comprises the following steps:
if the food temperature at the current moment is less than or equal to 0 ℃, stopping the rotation of the second fan and keeping the second air door open to continuously supply air to the refrigerating chamber;
if the food temperature at the present moment is higher than 0 ℃, the temperature of the cold air in the second chamber is continuously detected, and the rotating speed of the second fan is controlled to convey the cold air to the storage chamber.
Further optionally, the stopping of the introduction of the refrigerating air into the micro-freezing chamber and the storage of the refrigerating air includes:
closing the first air door, and controlling the first fan to rotate according to a third preset rotating speed so as to store cold storage air in the first compartment;
and when the temperature of the refrigerating air in the first compartment reaches the set temperature of the refrigerating air, stopping the rotation of the first fan.
Further optionally, the stopping of the introduction of the cooling air into the micro-freezing chamber and the introduction of the refrigerating air into the micro-freezing chamber to heat the micro-freezing chamber includes:
closing the second air door and stopping the second fan;
opening a first air door and starting a first fan;
and controlling the heating rate of the micro-freezing chamber to heat the temperature of the micro-freezing chamber to a second set temperature within a third preset time, wherein the second set temperature is equal to the second temperature.
Further optionally, the controlling the temperature increase rate of the micro-freezing chamber to increase the temperature of the micro-freezing chamber to the second set temperature within the third preset time includes:
detecting the temperature of refrigerating air in the storage room;
if the temperature of the refrigerating air at the current moment is lower than a third preset temperature, controlling the rotating speed of the first fan within a third rotating speed interval;
if the temperature of the cold air at the current moment is between the third preset temperature and the fourth preset temperature, controlling the rotating speed of the first fan within a second rotating speed interval;
if the temperature of the cold air at the current moment is higher than the fourth preset temperature, controlling the rotating speed of the first fan within a third rotating speed interval;
the upper limit value of the first rotating speed interval is less than or equal to the lower limit value of the second rotating speed interval, and the upper limit value of the second rotating speed interval is less than or equal to the lower limit value of the third rotating speed interval.
Further optionally, the controlling the cooling of the micro-freezing chamber to maintain the temperature of the food product at the second temperature comprises:
closing a first air door and stopping the first fan;
and opening the second air door and controlling the rotating speed of the second fan to intermittently supply air to the storage chamber so as to keep the temperature of the food at the second temperature.
Has the advantages that: the invention provides a novel refrigerator control method, which is characterized in that an extremely cold environment is created, so that moisture in food can rapidly pass through a maximum ice crystal generation zone, the volume expansion of ice crystals is reduced, and the degree of mechanical damage to cells is reduced. An ice film is formed on the surface of the food by quick freezing, and then the food is quickly warmed and stored, so that the interior of the food is not frozen, the food is not required to be thawed and cut by a knife when being eaten, and the nutrient loss of the food in the unfreezing process is reduced. The frozen product forming the ice film is stored at the temperature close to the freezing point, so that the ice film is prevented from melting, the refrigeration of the refrigerator is reduced, and the energy consumption is reduced.
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 exemplary embodiments of the present disclosure, and other drawings may be derived by those skilled in the art without inventive effort.
FIG. 1 is a diagram illustrating a control process of freezing food items stored in a refrigerator according to an embodiment;
FIG. 2 is a graph showing temperature changes at various stages during freezing of food in the refrigerator according to an embodiment;
FIG. 3 is a logic diagram illustrating a control method of a refrigerator according to an embodiment;
fig. 4 is a perspective view showing a structure of a refrigerator according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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 examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.
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.
In the process of storing food in the existing refrigerator, the problems of mechanical damage and quality damage caused by a large amount of ice crystals formed in the process of slowly cooling frozen food are solved; food frozen by the existing refrigerator needs to be unfrozen when being eaten, so that the problems of loss of food material juice and reduction of freshness and quality are caused; the refrigerator aims at frequent refrigeration during constant-low temperature refrigeration, and the working time of the evaporator, the compressor and other components is long, so that the energy consumption of the refrigerator is high. According to the invention, through temperature control, the food is rapidly cooled in an environment of-40 to-80 ℃, and an ice film is formed on the surface, so that the microbial infection is isolated, the fat oxidation is reduced, and the quality guarantee period is prolonged; and then rapidly heating to 0-3 ℃ for storage, keeping the ice film from melting, simultaneously keeping the interior of the food from freezing, avoiding thawing when eating, and reducing nutrition loss.
To further illustrate the technical solution of the present invention, the following specific examples are provided as shown in fig. 1 to 4.
Example 1
As shown in fig. 1 to 2, in the present embodiment, there is provided a refrigerator including: the freezing chamber evaporator comprises a refrigerating chamber, a micro-freezing chamber 1 and a freezing chamber, as well as a refrigerating chamber evaporator corresponding to the refrigerating chamber and a freezing chamber evaporator corresponding to the freezing chamber;
the air inlet of the refrigerating chamber is communicated with the compartment where the refrigerating chamber evaporator is located through the refrigerating chamber air inlet duct, and the air outlet of the refrigerating chamber is communicated with the compartment where the refrigerating chamber evaporator is located through the refrigerating chamber air return duct;
a micro-freezer 1 comprising: the refrigerator comprises a storage chamber 23, a first compartment 21 and a second compartment 22 which are respectively communicated with the storage chamber, wherein the storage chamber is provided with a first air inlet 24 communicated with an outlet of the first compartment and a second air inlet 25 communicated with an outlet of the second compartment;
the air inlet of the freezing chamber is communicated with the freezing air channel through a freezing chamber air inlet air channel, and the air outlet of the freezing chamber is communicated with the freezing air channel through a freezing chamber air return air channel;
the air door assembly comprises a first air door arranged at the first air inlet and a second air door arranged at the second air inlet;
and the fan assembly comprises a first fan arranged at the inlet of the first chamber and a second fan arranged at the inlet of the second chamber.
Preferably, the temperature of the first room temperature is maintained at 4-10 ℃; the second compartment is maintained at-40 to-80 ℃.
It should be noted that the compartment where the refrigerating compartment evaporator is located may be separately partitioned in the refrigerating compartment or separately disposed at other positions of the refrigerator; similarly, the freezing air ducts can be separately isolated in the freezing chamber or separately arranged at other positions of the refrigerator.
According to the invention, different compartments and air channels are arranged in the micro-freezing chamber 1, corresponding fans are arranged in the air channels, and the rotating speed of the fans is adjusted by monitoring the temperature changes of the compartments and the surfaces of food in real time, so that the food can be rapidly cooled and reheated. According to the refrigerator, the chamber structure is improved, and the temperature of the corresponding refrigerator chamber is adjusted, so that an ice film can be formed on the surface of food during rapid cooling, the infection of microorganisms can be effectively isolated, oxygen is reduced to enter the interior of the food to oxidize fat, and the shelf life of the food is prolonged; the rapid temperature return prevents the interior of the food from freezing, and the food is not required to be thawed and cut by a knife when being eaten, so that the nutrient loss of the food in the thawing process is reduced.
In the embodiment, the special first chamber (temperature return chamber) is designed to store the temperature return air of 4-10 ℃, when an ice film is formed on the surface of food, the temperature return air is conveyed to the storage chamber to quickly heat the food to-3-0 ℃, so that the internal freezing of the food is prevented, the generation of ice crystals is reduced, the food does not need to be thawed and cut by a knife when being eaten, and the nutrition loss of the food in the unfreezing process is reduced. In the embodiment, a special second chamber (cooling chamber) is designed, extremely cold air with the temperature of minus 70 ℃ to minus 80 ℃ is stored and is conveyed to the storage chamber, so that the surface of food is rapidly cooled, the extremely cold air rapidly passes through a maximum ice crystal generation zone, the volume expansion of ice crystals is reduced, and the degree of mechanical damage to cells is reduced; meanwhile, an ice film is formed on the surface of the food, so that the infection of microorganisms can be effectively isolated, oxygen is reduced to enter the interior of the food to oxidize fat, and the shelf life of the food is prolonged. Through adding the fan in air intake department in this embodiment, adjust and control fan speed according to compartment and food surface temperature, make compartment and food surface can rapid cooling and intensification. In the embodiment, the frozen product forming the ice film is stored at 0-3 ℃, so that the ice film is prevented from melting, the refrigeration of the refrigerator is reduced, and the energy consumption is reduced.
It should be noted that the refrigerator also has an air supply fan for supplying air to each compartment of the conventional refrigerator, such as: the air supply fan is arranged corresponding to the refrigerating chamber to supply air of the evaporator of the refrigerating chamber to the refrigerating chamber; the air supply fan is correspondingly arranged to respectively supply cold air of the evaporator of the freezing chamber to the freezing chamber and the micro-freezing chamber 1, the air supply duct of the freezing chamber can be divided into one path to be supplied to the micro-freezing chamber 1, and the air supply fan of the freezing chamber is utilized to simultaneously supply air to the micro-freezing chamber 1 and the freezing chamber. The refrigerator in the embodiment can be combined with a corresponding air supply fan to supply air to form corresponding air supply power, and then the air supply control is respectively carried out on the micro-freezing chamber 1 by utilizing the additionally arranged first fan and the second fan, so that the micro-freezing treatment can be carried out on food.
Example 2
As shown in fig. 1 to 4, in the present embodiment, there is provided a control method based on the refrigerator of embodiment 1, the control method including: after the micro-freezing program is started in the refrigerator, performing a micro-freezing process of the food, wherein the micro-freezing process of the food comprises the following steps:
a freezing storage stage: introducing cold air into the micro-freezing chamber 1 through the first chamber to cool the food, storing the cold air in the second chamber, and entering a quick freezing and temperature storing stage when the temperature of the cold air in the second chamber reaches a first set temperature;
fast freezing and temperature storage stage: stopping introducing the refrigerating air into the micro-freezing chamber 1 and storing the refrigerating air, introducing the refrigerating air into the micro-freezing chamber 1 and controlling the cooling rate of the micro-freezing chamber 1 and the cooling rate of the food in the micro-freezing chamber 1; monitoring the temperature of the food in the micro-freezing chamber 1, and entering a rapid temperature returning stage after the temperature of the food is reduced to a first temperature;
and (3) a quick temperature return stage: stopping introducing the freezing air into the micro-freezing chamber 1 and introducing the refrigerating air into the micro-freezing chamber 1 to heat the micro-freezing chamber 1; monitoring the temperature of the food in the micro-freezing chamber 1, and entering a fresh-keeping storage stage when the temperature of the food is raised to a second temperature;
and (3) fresh-keeping and storage stage: the supply of cold to the micro-freezing chamber is controlled to maintain the temperature of the food at the second temperature.
It is understood that, based on the refrigerator in embodiment 1, the refrigerator in this embodiment is an air-cooled refrigerator, and is composed of a refrigerating chamber, a micro-freezing chamber, and a freezing chamber, the micro-freezing chamber being interposed between the refrigerating chamber and the freezing chamber. The refrigerator has a double control system, and the refrigerating chamber, the micro-freezing chamber and the freezing chamber are respectively and independently refrigerated. The micro-freezing chamber and the freezing chamber are connected with different air channels, and the air channel switches are controlled by an electric air door to respectively control the temperatures of the two chambers. Specifically, the partial freezing chamber is divided into three chambers, namely a first chamber (a temperature return chamber), a second chamber (a temperature reduction chamber) and a storage chamber, the three chambers are separated respectively, and the corresponding chambers can be communicated only when the corresponding air doors are opened. Temperature sensors are respectively arranged in different chambers, and the temperature of the space and the temperature of the food are detected every preset time h (1 min-3 min).
The first chamber is connected with a first air inlet, a first fan is arranged in the first air inlet, the air channel is connected with a refrigerating chamber air return channel, and refrigerating chamber air can be conveyed to the first chamber, so that the temperature in the first chamber is maintained at 4-10 ℃. The second compartment is connected with a second air inlet, a second fan is arranged in the second air inlet, the air channel is connected with a freezing chamber evaporator, and cold air can be conveyed to the second compartment, so that the temperature of the second compartment is reduced to-40 ℃ to-80 ℃. The storage chamber is used for storing food and can be respectively communicated with the first compartment and the second compartment through the first air door and the second air door.
In some optional modes, the step of introducing cold air into the micro-freezing chamber through the first chamber to cool the food and the step of storing the cold air in the second chamber comprises the following steps: setting the set temperature of the micro-freezing chamber to a first set temperature; opening a first air door, and controlling a first fan to rotate according to a first preset rotating speed so as to convey refrigerating air to a storage chamber; and closing the second air door, and controlling the second fan to rotate according to a second preset rotating speed so as to store the cold air in the second chamber.
Specifically, in the freeze storage stage: the evaporator of the freezing chamber starts to refrigerate, the second air door is closed, the second fan is opened, the rotating speed is 600-800 r/min, air is supplied to the second chamber to cool the second chamber to-70-80 ℃, and a certain amount of extremely cold air is rapidly stored; meanwhile, the first air door is opened, the storage chamber is communicated with the first chamber, the first fan is opened, the rotating speed is 800-1000 r/min, the temperature of the storage chamber is reduced, and the time for subsequent cooling is shortened.
In this embodiment, the step of introducing the freezing air into the micro-freezing chamber and controlling the cooling rate of the micro-freezing chamber and the cooling rate of the food in the micro-freezing chamber includes: controlling the cooling rate of the micro-freezing chamber to cool the temperature of the micro-freezing chamber to a first set temperature within a first preset time; controlling the rotating speed of the second fan to reduce the temperature of the food to the first temperature within a second preset time; the first set temperature is lower than the first temperature, and the first preset time is shorter than the second preset time. Preferably, the first set temperature is in the range of-70 ℃ to-80 ℃; the first temperature range is-1 ℃ to-5 ℃. Preferably, the introducing of the freezing air into the micro-freezing chamber and the controlling of the cooling rate of the micro-freezing chamber and the cooling rate of the food in the micro-freezing chamber further comprises: detecting the temperature of the cold air in the storage chamber; if the temperature of the cold air at the current moment is lower than a first preset temperature, controlling the rotating speed of the second fan within a first rotating speed interval; if the temperature of the cold air at the current moment is between the first preset temperature and the second preset temperature, controlling the rotating speed of the second fan within a second rotating speed interval; if the temperature of the cold air at the current moment is higher than a second preset temperature, controlling the rotating speed of the second fan within a third rotating speed interval; the upper limit value of the first rotating speed interval is smaller than or equal to the lower limit value of the second rotating speed interval, and the upper limit value of the second rotating speed interval is smaller than or equal to the lower limit value of the third rotating speed interval.
Further, let in the cooling wind and control the cooling rate of freezing room and the cooling rate of freezing indoor food to the little room of freezing still includes: the method comprises the following steps: if the food temperature at the current moment is less than or equal to 0 ℃, stopping the rotation of the second fan and keeping the second air door open to continuously supply air to the refrigerating chamber; if the food temperature at the present moment is higher than 0 ℃, the temperature of the cold air in the second chamber is continuously detected, and the rotating speed of the second fan is controlled to convey the cold air to the storage chamber.
After entering the fast freezing and temperature storing stage, the temperature storing stage and the fast freezing stage are performed simultaneously.
Wherein the rapid freezing stage comprises: the first air door is closed, the second air door is opened, the refrigerating chamber is communicated with the second chamber, extremely cold air at-70 to-80 ℃ in the second chamber is immediately conveyed to the refrigerating chamber, the temperature in the refrigerating chamber is rapidly reduced, and the temperature T of the chamber is monitored when the preset time h (1min to 3min) is reached, wherein the higher the temperature T is, the higher the rotating speed of the fan is. And simultaneously monitoring the surface temperature of the food, stopping the fan when the surface temperature t of the food is reduced to 0 ℃, and continuously sending cold air to the second air inlet until the surface temperature t of the food is reduced to-5 ℃ to-1 ℃. Then the timer starts to time for 5min to 10min, the temperature of the storage room is kept at T3(-40 ℃ to-80 ℃), the food is frozen rapidly at the stage, and an ice film begins to form on the surface.
The temperature storage stage comprises: the temperature storage stage is used for storing the air in the refrigerating chamber at 4-10 ℃ in the first chamber, so that the subsequent temperature return time is shortened. At the moment, the first air door is closed, the first fan is opened, the rotating speed is 600-800 r/min, and the first fan continuously supplies air to the first chamber, so that a certain amount of gas at 4-10 ℃ is stored in the first chamber. When the temperature of the first compartment reaches 4-10 ℃, the first fan stops running, but the air can be continuously supplied into the first compartment through the first air inlet by utilizing the return air power of the refrigerating compartment, so that the temperature of the first compartment is kept at 4-10 ℃.
In some alternatives, stopping the flow of the cooling air into the micro-freezer compartment and storing the cooling air includes: closing the first air door, and controlling the first fan to rotate according to a third preset rotating speed so as to store cold storage air in the first compartment; and when the temperature of the refrigerating air in the first compartment reaches the set temperature of the refrigerating air, stopping the rotation of the first fan.
Preferably, stopping the supply of the freezing air into the micro-freezing chamber and supplying the refrigerating air into the micro-freezing chamber to heat the micro-freezing chamber includes: closing the second air door and stopping the second fan; opening a first air door and starting a first fan; and controlling the heating rate of the micro-freezing chamber to heat the temperature of the micro-freezing chamber to a second set temperature within a third preset time, wherein the second set temperature is equal to the second temperature. Controlling the heating rate of the micro-freezing chamber to heat the temperature of the micro-freezing chamber to a second set temperature within a third preset time comprises: detecting the temperature of refrigerating air in the storage room; if the temperature of the refrigerating air at the current moment is lower than a third preset temperature, controlling the rotating speed of the first fan within a third rotating speed interval; if the temperature of the cold air at the current moment is between the third preset temperature and the fourth preset temperature, controlling the rotating speed of the first fan within a second rotating speed interval; if the temperature of the cold air at the current moment is higher than the fourth preset temperature, controlling the rotating speed of the first fan within a third rotating speed interval; the upper limit value of the first rotating speed interval is smaller than or equal to the lower limit value of the second rotating speed interval, and the upper limit value of the second rotating speed interval is smaller than or equal to the lower limit value of the third rotating speed interval.
Specifically, in the rapid temperature return stage: and the evaporator stops refrigerating, the second air door is closed to stop air supply, the first air door is opened, the first chamber is communicated with the storeroom, the first fan is opened to supply air to the storeroom, and the gas at 4-10 ℃ in the first chamber is rapidly released to the storeroom to rapidly heat the storeroom. The temperature T of the storeroom is monitored in real time, and the smaller the T is, the higher the rotating speed of the first fan is. When the temperature T of the storage room is increased to T3 (-3-0 ℃), the surface temperature T of the food is also rapidly increased to-3-0 ℃ along with the temperature of the storage room. The food is quickly warmed up at the stage, the ice film on the surface of the food is prevented from melting at the ambient temperature of-3-0 ℃, meanwhile, the interior of the food is not frozen, and most of the food is in a non-frozen state, so that the generated ice crystals are prevented from damaging cells.
In some alternatives, controlling the cooling of the micro-freezing chamber to maintain the temperature of the food product at the second temperature comprises: closing the first air door and stopping the first fan; and opening the second air door and controlling the rotating speed of the second fan to intermittently supply air to the storage chamber so as to keep the temperature of the food at the second temperature.
Specifically, in the fresh-keeping storage stage: the first air door is closed, the second air door is kept open, the storeroom and the second room are kept communicated, the evaporator recovers refrigeration, the storeroom is intermittently supplied with air by controlling the start and stop of the second fan (the intermittent air supply can be considered as cold air normally supplied when the air supply fan of the freezing room is not considered during operation), the temperature of the refrigerating room is kept at-3-0 ℃, and food is stored at the temperature. The fresh-keeping effect is achieved and the energy is saved.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities 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 (12)
1. A refrigerator, characterized in that the refrigerator comprises: the refrigerating chamber, the micro-freezing chamber and the freezing air duct are internally provided with a freezing evaporator;
the refrigerating chamber is provided with an air inlet duct and an air return duct;
the micro-freezing chamber comprises: the refrigerator comprises a storage chamber, a first chamber and a second chamber, wherein the first chamber and the second chamber are respectively communicated with the storage chamber;
the air door assembly comprises a first air door arranged at the first air inlet and a second air door arranged at the second air inlet;
the fan assembly comprises a first fan arranged at the inlet of the first chamber and a second fan arranged at the inlet of the second chamber;
preferably, the temperature of the first room temperature is maintained at 4-10 ℃; the second compartment is maintained at-40 to-80 ℃.
2. The refrigerator according to claim 1, further comprising: a freezing chamber and a refrigerating chamber are arranged in the freezing chamber,
the freezer is by freezing wind channel provides cold wind, wherein: the air inlet of the freezing chamber is communicated with the freezing air channel through a freezing chamber air inlet air channel, and the air outlet of the freezing chamber is communicated with the freezing air channel through a freezing chamber return air channel.
3. A control method for a refrigerator according to claim 1 or 2, wherein the control method comprises: performing a micro-freezing process of the food product after the micro-freezing procedure is initiated by the refrigerator, wherein the micro-freezing process of the food product comprises:
a freezing storage stage: introducing cold air into the micro-freezing chamber through the first chamber to cool the food, storing cold air in the second chamber, and entering a rapid freezing and temperature storing stage when the temperature of the cold air in the second chamber reaches a first set temperature;
the rapid freezing and temperature storage stage: stopping introducing the refrigerating air into the micro-freezing chamber and storing the refrigerating air, introducing the freezing air into the micro-freezing chamber and controlling the cooling rate of the micro-freezing chamber and the cooling rate of the food in the micro-freezing chamber; monitoring the temperature of the food in the micro-freezing chamber, and entering a quick temperature return stage after the temperature of the food is reduced to a first temperature;
the quick temperature return stage comprises: stopping introducing the freezing air into the micro-freezing chamber and introducing the refrigerating air into the micro-freezing chamber to heat the micro-freezing chamber; monitoring the temperature of the food in the micro-freezing chamber, and entering a fresh-keeping storage stage when the temperature of the food is raised to a second temperature;
the fresh-keeping storage stage: the supply of cold to the micro-freezing chamber is controlled to maintain the temperature of the food at the second temperature.
4. The control method of claim 3, wherein the step of introducing cooling air into the micro-freezing chamber through the first chamber to cool the food and storing the cooling air in the second chamber comprises:
setting the set temperature of the micro-freezing chamber to a first set temperature;
opening a first air door, and controlling a first fan to rotate according to a first preset rotating speed so as to convey refrigerating air to a storage chamber;
and closing the second air door, and controlling the second fan to rotate according to a second preset rotating speed so as to store the cold air in the second chamber.
5. The control method according to claim 3, wherein the introducing of the freezing air into the micro-freezing chamber and the controlling of the cooling rate of the micro-freezing chamber and the cooling rate of the food in the micro-freezing chamber comprises:
controlling the cooling rate of the micro-freezing chamber to cool the temperature of the micro-freezing chamber to the first set temperature within a first preset time;
controlling the rotating speed of a second fan to reduce the temperature of the food to the first temperature within a second preset time;
the first set temperature is lower than the first temperature, and the first preset time is shorter than the second preset time.
6. The control method according to claim 5, characterized in that the first set temperature is in the range of-70 ℃ to-80 ℃; the first temperature is in the range of-1 ℃ to-5 ℃.
7. The method of claim 5, wherein said passing a freezing air into the micro-freezing chamber and controlling the cooling rate of the micro-freezing chamber and the cooling rate of the food in the micro-freezing chamber further comprises:
detecting the temperature of the cold air in the storage chamber;
if the temperature of the cold air at the current moment is lower than a first preset temperature, controlling the rotating speed of the second fan within a first rotating speed interval;
if the temperature of the cold air at the current moment is between the first preset temperature and the second preset temperature, controlling the rotating speed of the second fan within a second rotating speed interval;
if the temperature of the cold air at the current moment is higher than a second preset temperature, controlling the rotating speed of the second fan within a third rotating speed interval;
the upper limit value of the first rotating speed interval is less than or equal to the lower limit value of the second rotating speed interval, and the upper limit value of the second rotating speed interval is less than or equal to the lower limit value of the third rotating speed interval.
8. The method of claim 5, wherein said passing a freezing air into the micro-freezing chamber and controlling the cooling rate of the micro-freezing chamber and the cooling rate of the food in the micro-freezing chamber further comprises: the method comprises the following steps:
if the food temperature at the current moment is less than or equal to 0 ℃, stopping the rotation of the second fan and keeping the second air door open to continuously supply air to the refrigerating chamber;
if the food temperature at the present moment is higher than 0 ℃, the temperature of the cold air in the second chamber is continuously detected, and the rotating speed of the second fan is controlled to convey the cold air to the storage chamber.
9. The control method of claim 3, wherein stopping the flow of the refrigerating air into the micro-freezing chamber and storing the refrigerating air comprises:
closing the first air door, and controlling the first fan to rotate according to a third preset rotating speed so as to store cold storage air in the first compartment;
and when the temperature of the refrigerating air in the first compartment reaches the set temperature of the refrigerating air, stopping the rotation of the first fan.
10. The control method according to claim 3, wherein stopping the supply of the freezing air into the micro-freezing chamber and supplying the refrigerating air into the micro-freezing chamber to raise the temperature of the micro-freezing chamber comprises:
closing the second air door and stopping the second fan;
opening a first air door and starting a first fan;
and controlling the heating rate of the micro-freezing chamber to heat the temperature of the micro-freezing chamber to a second set temperature within a third preset time, wherein the second set temperature is equal to the second temperature.
11. The method of claim 10, wherein controlling the rate of warming of the micro-freezing chamber to warm the temperature of the micro-freezing chamber to the second set point temperature for a third predetermined time comprises:
detecting the temperature of refrigerating air in the storage room;
if the temperature of the refrigerating air at the current moment is lower than a third preset temperature, controlling the rotating speed of the first fan within a third rotating speed interval;
if the temperature of the cold air at the current moment is between the third preset temperature and the fourth preset temperature, controlling the rotating speed of the first fan within a second rotating speed interval;
if the temperature of the cold air at the current moment is higher than the fourth preset temperature, controlling the rotating speed of the first fan within a third rotating speed interval;
the upper limit value of the first rotating speed interval is less than or equal to the lower limit value of the second rotating speed interval, and the upper limit value of the second rotating speed interval is less than or equal to the lower limit value of the third rotating speed interval.
12. The method of claim 11, wherein controlling the cooling of the micro-freezing chamber to maintain the temperature of the food product at the second temperature comprises:
closing a first air door and stopping the first fan;
and opening the second air door and controlling the rotating speed of the second fan to intermittently supply air to the storage chamber so as to keep the temperature of the food at the second temperature.
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