CN114264114B - Freezing control method, refrigerator controller, non-transient computer readable storage medium and refrigerator - Google Patents
Freezing control method, refrigerator controller, non-transient computer readable storage medium and refrigerator Download PDFInfo
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- CN114264114B CN114264114B CN202111656765.7A CN202111656765A CN114264114B CN 114264114 B CN114264114 B CN 114264114B CN 202111656765 A CN202111656765 A CN 202111656765A CN 114264114 B CN114264114 B CN 114264114B
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Abstract
The invention belongs to the technical field of refrigeration, and particularly relates to a refrigerator refrigeration control method and a refrigerator, wherein the control method comprises the following steps: a pre-cooling stage, namely cooling the storage chamber to a first temperature within the time delta t1 and maintaining the temperature for the time delta t2; in the supercooling stage, the temperature of the storage chamber is reduced from the first temperature to the second temperature and maintained, the temperature of the food is monitored, and when the temperature of the food reaches a freezing temperature point, the second temperature delta t3 of the storage chamber is continuously maintained; in the temperature return stage, the temperature of the storage chamber is increased, so that the temperature of the storage chamber is increased from the second temperature to a third temperature; a storage stage, maintaining the third temperature of the storage chamber to store the food under the temperature condition; the first temperature is-5 to 1 ℃; the second temperature is-80 ℃ to-30 ℃; the third temperature is-5 to 1 ℃. According to the invention, by means of sectional type freezing treatment of the food, the phenomenon that the quality of the food is deteriorated due to rapid deep freezing is avoided, and the problem of food quality caused by unfreezing after the food is frozen at ultralow temperature is also avoided.
Description
Technical Field
The invention belongs to the technical field of refrigeration, and particularly relates to a refrigerator refrigeration control method and a refrigerator.
Background
With the continuous improvement of living standard and the improvement of dietary structure, people have higher and higher requirements on the freshness of food needing to be frozen and the durability of the freshness keeping of the food needing to be frozen, so that the food needing to be frozen can be kept fresh in sense, and the nutrient substances of the food can be kept to the maximum extent, particularly the food needing to be frozen for meat. At present, the meat preservation technology of a refrigerator can be divided into freezing and refrigerating according to the temperature: (1) The freezing preservation refers to that the meat is stored below the freezing point, more than 80 percent of water in the meat is frozen, the method has the advantages that the storage period of the meat can be prolonged to the maximum extent, the infection of microorganisms and the oxidation of fat are prevented, and the defects that ice crystals generated in the freezing process of the water can puncture cells, so that the loss of nutrients and the deterioration of taste are caused. (2) The method has the advantages that the taste and the flavor of the meat can be maintained to the maximum extent, and the method has the defects that the storage period is short, the meat is easy to deteriorate and the fat is easy to oxidize due to high storage temperature, and the storage period is only 1 to 3 days.
Therefore, there is a need to provide a solution that will not cause the taste of meat to deteriorate, but will also extend the shelf life of foods that require freezing.
The present invention has been made in view of this situation.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a refrigerator freezing control method and a refrigerator,
in order to solve the technical problem, the invention provides a refrigerator freezing control method, which comprises the following steps:
a pre-cooling stage, namely cooling the storage chamber to a first temperature within the time delta t1 and maintaining the temperature for the time delta t2;
in the supercooling stage, the temperature of the storage chamber is reduced from the first temperature to the second temperature and maintained, the temperature of the food is monitored, and when the temperature of the food reaches a freezing temperature point, the second temperature delta t3 of the storage chamber is continuously maintained;
in the temperature return stage, the temperature of the storage chamber is increased, so that the temperature of the storage chamber is increased from the second temperature to a third temperature;
a storage stage, maintaining the third temperature of the storage chamber to store the food under the temperature condition;
the first temperature is-5 to 1 ℃; the second temperature is-80 ℃ to-30 ℃; the third temperature is-5 to 1 ℃.
Further optionally, the cooling the storage compartment to the first temperature for the Δ t1 time and maintaining for the Δ t2 time includes
Acquiring a compartment temperature T1 and a food temperature T2;
controlling the compressor to start, and reducing the temperature of the storage chamber to a first temperature within the time delta t 1;
the compressor is controlled to operate at the lowest frequency and maintain the first temperature of the storage compartment at 2 times.
Further optionally, the cooling and maintaining of the storage compartment from the first temperature to the second temperature, the monitoring of the temperature of the food, and the continuing of maintaining the storage compartment at the second temperature Δ t3 for a time when the temperature of the food reaches the freezing temperature point comprise
Controlling the compressor to continuously operate, controlling the fan to start, and controlling the compressor to operate at the lowest frequency and the fan to operate at the lowest rotating speed to maintain the second temperature of the storage chamber after the first temperature of the storage chamber is reduced to the second temperature;
the temperature of the food is monitored and the second temperature of the storage compartment is maintained for a time Δ t3 when the temperature of the food reaches the freezing point.
Further optionally, the controlling the compressor to continue operating and the controlling the fan to start, and after the temperature of the storage compartment is decreased from the first temperature to the second temperature, the controlling the compressor to operate at the lowest frequency and the fan to operate at the lowest speed to maintain the second temperature of the storage compartment, includes
Controlling the compressor to operate at the frequency of F1 and the fan to operate at the rotating speed of V1;
judging whether the temperature of the storage chamber is reduced to a second temperature, if so, controlling the compressor to operate at the lowest frequency and controlling the fan to operate at the lowest rotating speed; if the temperature of the storage chamber is not reached, the operation frequency of the compressor and the rotating speed of the fan are increased until the temperature of the storage chamber is reduced to a second temperature.
Further optionally, the inner wall of the compartment is provided with a heating device, and the heating device heats the storage compartment to a third temperature from a second temperature, including
Controlling the compressor and the fan to stop running;
controlling a heating device to start heating to heat the storage compartment;
and stopping heating when the temperature of the storage compartment is increased from the second temperature to the third temperature.
Further optionally, maintaining the third temperature of the storage compartment allows the food to be stored at this temperature condition, including
The compressor is controlled to operate at the lowest frequency and the fan is controlled to operate at the lowest rotational speed to maintain the third temperature of the storage compartment.
Further optionally, the Δ t1 time is: 10-15 min.
Further optionally, the Δ t2 time is 5 to 10min.
Further optionally, the Δ t3 time is: 10-20 min.
The present invention also proposes a refrigerator controller comprising one or more processors and a non-transitory computer readable storage medium storing program instructions which, when executed by the one or more processors, are adapted to implement the method according to any one of the above.
The invention also proposes a non-transitory computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method according to any one of the preceding claims.
The invention also provides a refrigerator which adopts the method of any one item, or comprises the control device or is provided with the non-transitory computer readable storage medium.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
the food is pre-cooled, and the storage chamber is cooled to the first temperature, so that the problem of quality degradation of the food due to rapid cooling is avoided. And then, the temperature of the storage room is rapidly reduced to a second temperature, so that a layer of ice film is generated on the surface of the food, the ice film effectively isolates the contact between the internal food and the outside, the infection of microorganisms is isolated, the food is stored in a slightly frozen state, and the purpose of keeping the food fresh is achieved. According to the invention, by means of sectional type freezing treatment of the food, the phenomenon that the quality of the food is deteriorated due to rapid deep freezing is avoided, and the problem of food quality caused by unfreezing after the food is frozen at ultralow temperature is also avoided.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention to the proper form disclosed herein. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1: is a control logic diagram of an embodiment of the present invention.
FIG. 2: is a control logic diagram of a specific implementation of an embodiment of the present invention.
FIG. 3: is a flow chart of the freezing temperature control of the embodiment of the invention.
FIG. 4: is a structure diagram of a refrigerator of an embodiment of the invention.
Wherein: 1. a storage compartment; 2. and (7) air outlet.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Aiming at the problems of nutrient loss and taste deterioration caused by the freezing of the existing food, as shown in fig. 4, the refrigerator comprises a storage chamber 1, a temperature monitoring module is arranged in the storage chamber 1, the temperature monitoring module comprises a first temperature detection device for collecting the chamber temperature and a second temperature detection device for collecting the food temperature, and the second temperature detection device can be an infrared temperature detection device. The refrigerator of this embodiment still is equipped with refrigerating system, and refrigerating system is used for carrying cold volume to storage room 1, and refrigerating system includes compressor, evaporimeter, condenser and choke valve, and the refrigerator of this embodiment still is equipped with the fan, and the fan is used for blowing storage room 1, still is equipped with air outlet 2 on the storage room 1.
The present embodiment proposes a method for controlling freezing of a refrigerator, such as the control logic diagram shown in fig. 1, which includes stages S1 to S4, wherein:
s1, in a pre-cooling stage, cooling a storage chamber to a first temperature within delta t1 time and maintaining the temperature for delta t2 time; the first temperature is-5 to 1 ℃; preferably between-3 ℃ and-0 ℃. In the pre-cooling stage, the food is gradually reduced to the first temperature, so that the problem of quality degradation of the food caused by rapid temperature reduction is avoided.
S2, cooling the storage chamber from the first temperature to a second temperature, maintaining the temperature, monitoring the temperature of the food, and continuously maintaining the second temperature of the storage chamber for delta t3 when the temperature of the food reaches a freezing temperature point; in the supercooling stage, the temperature of the compartment is reduced from a first temperature to a second temperature, the second temperature is-80 ℃ to-30 ℃, preferably-80 ℃ to-40 ℃, the food cooling speed is slower than that of the storage compartment, when the temperature of the food is reduced to a freezing temperature point, namely the temperature T freezing point in the temperature in the figure 3 is reached, for example, -4 ℃ to-6 ℃, the latent heat is released by the food, the temperature of the food begins to slowly decrease after rising, the surface of the food begins to freeze, an ice film is formed, the ice film effectively isolates the contact between the internal food and the outside, and the infection of microorganisms is isolated.
S3, in the temperature return stage, heating the storage chamber to a third temperature from the second temperature; the third temperature is-5 to 1 ℃; preferably at a temperature of-3 ℃ to-0 ℃; and after the ice film completely covers the surface of the food, the temperature of the compartment is raised to a third temperature, and the food cannot be frozen under the condition, so that the food is in a slightly frozen state with the external ice film covering and the internal fresh-keeping function.
S4, in the storage stage, maintaining the third temperature of the storage chamber to store the food under the temperature condition; the food is in a slightly frozen state at low temperature, so that the outer ice film can be kept from being melted, the food in the food can be kept to be fresh for a long time, and the problem of poor taste of the frozen food is solved.
The embodiment adopts a pre-freezing mode, the storage chamber is cooled to a first temperature to enable food to have a temperature buffering period, then the storage chamber is cooled to a second temperature from the first temperature to enable an ice film to be formed on the surface of the food, the interior of the food is not frozen, the ice film outside the food can effectively isolate infection of microorganisms, oxygen is prevented from entering the interior of the food to cause the food to deteriorate, and the shelf life of the food is prolonged; meanwhile, the interior of the food is in an unfrozen state, so that ice crystals are prevented from being generated to damage cells, and the problem of food frost crack quality deterioration caused by rapid cooling is solved. And then the temperature of the storage chamber is raised to a third temperature to store the food in a slightly frozen state, thereby achieving the purpose of keeping the food fresh. The ice film isolates the inside of the food from the microorganisms on the outer layer, effectively prevents the oxidation of protein and lipid of the food inside, and prolongs the storage period of the food.
Further optionally, S1 includes S11 to S13, where:
s11, acquiring a compartment temperature T1 and a food temperature T2;
s12, controlling the compressor to start, and reducing the temperature of the storage chamber to a first temperature within delta t 1;
and S13, controlling the compressor to run at the lowest frequency, and maintaining the first temperature delta t2 of the storage chamber for a time.
In this embodiment, as shown in the control logic diagram of fig. 2, in the pre-cooling stage, the compressor is turned on, the refrigeration program is turned on, and the cooling control is performed on the storage compartment step by step. The storage compartment and the food temperature are lowered to the first temperature during a time Δ t1, for example, 10-15 min. In fig. 3 Δ t1 is the time t 1. One way that this can be done is to directly obtain the storage compartment temperature T1 and the food temperature T2, and when the storage compartment and the food temperature reach the first default temperature of the system, that is, the ttst temperature in fig. 3, for example: -3 ℃ to 0 ℃, the first temperature is determined to be reached. The first temperature is optionally a freezing temperature of the food. The other specific implementation mode is as follows: acquiring a storage compartment T1, a food temperature T2 and a freezing point temperature T0 preset by a system; the temperature differences Δ T1= T1-T0|, Δ T2= | T2-T0|, respectively, are calculated, and when Δ T1=0, Δ T2=0 is satisfied, it is determined that the first temperature is reached. The pre-cooling phase is completed when the storage compartment and the food respectively reach the first temperature. The compressor is operated at the lowest frequency and the current first temperature is maintained for a time Δ t2, e.g., 5min to 10min. In fig. 3, Δ t2 is a time period between t1 and t 2.
Further optionally, S2 includes S21 to S22, where:
s21, controlling the compressor to continuously operate, controlling the fan to start, and controlling the compressor to operate at the lowest frequency and the fan to operate at the lowest rotating speed to maintain the second temperature of the storage chamber after the first temperature of the storage chamber is reduced to the second temperature;
s22, monitoring the temperature of the food, and continuously maintaining the second temperature delta t3 of the storage chamber when the food reaches a freezing temperature point; the freezing temperature point is the turning point at which the food temperature first shows a temperature rising trend.
In this embodiment, as shown in the control logic diagram of fig. 2, during the supercooling phase, the food is released from the pre-frozen state, and an ice film is generated on the surface of the food. Firstly, the compressor is controlled to operate at the frequency of F1 and the fan is controlled to operate at the rotating speed of V1, and a cooling program is started, for example, a time period from t2 to t3 in the graph 3. If the storage compartment reaches a second temperature, i.e., tsecond temperature in FIG. 3, e.g., T1 decreases to-80 deg.C to-40 deg.C, or Δ T1 reaches 37 deg.C to 80 deg.C, indicating that the second temperature is reached, the compressor is controlled to operate at the lowest frequency and the fan is controlled to operate at the lowest rotational speed to maintain the second temperature of the freezer compartment; and if the storage chamber cannot reach the second temperature under the compressor frequency and the fan rotating speed, increasing the compressor operating frequency and the fan rotating speed until the storage chamber is reduced to the second temperature. For example, the frequency of the compressor is increased by a value P2, the rotational speed of the fan is increased by a value V2, and it is determined again whether the storage compartment reaches the second temperature, and if so, the compressor is controlled to operate at the lowest frequency and the fan operates at the lowest rotational speed to maintain the second temperature of the freezing compartment. The food temperature is then monitored. Since the temperature of the food is slowly decreased after the temperature of the storage compartment is decreased to the second temperature, when the temperature of the food is decreased to a certain degree, that is, the freezing temperature point T in fig. 3 is reached, for example, between-4 ℃ and-6 ℃, the food releases latent heat, the temperature of the food starts to slowly decrease after rising to the freezing temperature, the surface of the food starts to freeze, and an ice film is formed, therefore, when the temperature of the food reaches the freezing temperature, the first temperature Δ T3 of the storage compartment is maintained for 10min to 20min, for example, so that the ice film completely covers the surface of the food, and then the temperature of the storage compartment is increased to the freezing temperature, so that the food is stored after being heated to the freezing temperature. In fig. 3, Δ t3 is a time period between t4 and t 5.
Further optionally, the inner wall of the compartment is provided with a heating device, step S3 includes S31 to S32,
s31, controlling the compressor and the fan to stop running;
s32, controlling a heating device to start heating to heat the storage compartment; and stopping heating when the temperature of the storage compartment is increased from the second temperature to the third temperature.
In this embodiment, as shown in the control logic diagram illustrated in fig. 2, in the temperature return stage, the compressor stops operating, the fan stops operating, and the temperature raising program is started. When the temperature of the storage compartment reaches a third temperature, such as ttrd temperature in fig. 3, for example, T1 is raised to-3 ℃ to 0 ℃, or Δ T1=0 ℃, the heating device is controlled to stop heating, at this time, the food is subjected to a micro-freezing storage phase, and the food is subjected to micro-freezing fresh-keeping storage, in fig. 3, the time period between T5 and T6 is a temperature return phase, and the time after T6 is a storage phase, and the first temperature and the third temperature in this embodiment may be the same or different. .
Further optionally, step S4 includes S41, wherein:
and S41, controlling the compressor to operate at the lowest frequency and the fan to operate at the lowest rotating speed so as to maintain the third temperature of the storage compartment.
In this embodiment, as shown in the control logic diagram of fig. 2, in the storage stage, the compressor is operated at the lowest operating frequency and the fan is operated at the lowest rotation speed to maintain the third temperature of the storage compartment, and in this stage, the temperature of the food is also raised to the third temperature, and the micro-freezing and refreshing storage is performed under this temperature condition. In the storage stage, the outer ice film of food can not melt and isolated inside food and external contact, and inside food can not produce the problem that nutrient substance runs off because of freezing, and food is frozen fresh-keeping and is stored a little.
The present embodiments also propose a refrigerator controller comprising one or more processors and a non-transitory computer readable storage medium storing program instructions which, when executed by the one or more processors, are configured to implement a method according to any one of the above.
The present embodiment also proposes a non-transitory computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method according to any one of the preceding claims.
The present embodiment also proposes a refrigerator employing the method of any one of the above, or comprising the control device of the above, or having the non-transitory computer-readable storage medium of the above.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A freezing control method of a refrigerator is characterized by comprising the following stages:
a pre-cooling stage, namely cooling the storage chamber to a first temperature within the time delta t1 and maintaining the temperature for the time delta t2;
in the supercooling stage, the temperature of the storage chamber is reduced from the first temperature to the second temperature and maintained, the temperature of the food is monitored, and when the temperature of the food reaches a freezing temperature point, the second temperature delta t3 of the storage chamber is continuously maintained;
in the temperature return stage, the temperature of the storage chamber is increased, so that the temperature of the storage chamber is increased from the second temperature to a third temperature;
a storage stage, maintaining the third temperature of the storage chamber to store the food under the temperature condition;
the step of reducing the temperature of the storage chamber to the first temperature within the time delta t1 and maintaining the temperature for the time delta t2 comprises
Acquiring a compartment temperature T1 and a food temperature T2;
controlling the compressor to start, and reducing the temperature of the storage chamber to a first temperature within delta t1 time;
controlling the compressor to run at the lowest frequency and maintaining the first temperature delta t2 of the storage chamber;
the storage chamber is cooled from the first temperature to the second temperature and maintained, the temperature of the food is monitored, and when the temperature of the food reaches the freezing temperature point, the second temperature delta t3 of the storage chamber is continuously maintained, including
Controlling the compressor to continuously operate, controlling the fan to start, and controlling the compressor to operate at the lowest frequency and the fan to operate at the lowest rotating speed to maintain the second temperature of the storage chamber after the first temperature of the storage chamber is reduced to the second temperature;
monitoring the temperature of the food, and continuously maintaining the second temperature delta t3 of the storage chamber when the temperature of the food reaches a freezing temperature point;
the maintaining of the third temperature in the storage compartment allows the food to be stored at this temperature condition, including controlling the compressor to operate at a minimum frequency and the fan to operate at a minimum speed to maintain the third temperature in the storage compartment.
2. The freezing control method of a refrigerator according to claim 1,
the first temperature is-5 to 1 ℃; the second temperature is-80 ℃ to-30 ℃; the third temperature is-5 to 1 ℃.
3. The freezing control method of a refrigerator according to claim 1,
the method comprises controlling the compressor to continue operating and the fan to start, controlling the compressor to operate at the lowest frequency and the fan to operate at the lowest rotation speed to maintain the second temperature of the storage chamber after the first temperature of the storage chamber is reduced to the second temperature, and comprises
Controlling the compressor to operate at the frequency of F1 and the fan to operate at the rotating speed of V1;
judging whether the temperature of the storage chamber is reduced to a second temperature, if so, controlling the compressor to operate at the lowest frequency and controlling the fan to operate at the lowest rotating speed; if not, the running frequency of the compressor and the rotating speed of the fan are increased until the temperature of the storage chamber is reduced to a second temperature.
4. A method as claimed in claim 1, wherein the heating means is provided on the inner wall of the compartment, and the heating process for the storage compartment from the second temperature to the third temperature comprises heating the storage compartment from the second temperature to the third temperature
Controlling the compressor and the fan to stop running;
controlling a heating device to start heating to heat the storage compartment;
and stopping heating when the temperature of the storage chamber is increased from the second temperature to the third temperature.
5. The freezing control method of a refrigerator according to claim 1, wherein the Δ t1 time is: 10-15 min.
6. The freezing control method of a refrigerator according to claim 1, wherein the Δ t2 time is 5-10 min.
7. The freezing control method of a refrigerator according to claim 1, wherein the Δ t3 time is: 10-20 min.
8. A refrigerator controller comprising one or more processors and a non-transitory computer-readable storage medium storing program instructions, the one or more processors being configured to implement the method of any one of claims 1-7 when the program instructions are executed by the one or more processors.
9. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
10. A refrigerator employing the method of any one of claims 1 to 7 or comprising the controller of claim 8 or having the non-transitory computer readable storage medium of claim 9.
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| CN114923311B (en) * | 2022-05-13 | 2024-02-23 | 珠海格力电器股份有限公司 | Control device of refrigerator, refrigerator and control method |
| CN114909848A (en) * | 2022-05-13 | 2022-08-16 | 珠海格力电器股份有限公司 | Control device of refrigerator, refrigerator and control method |
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| CN110671877A (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 |
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| CN110671876A (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 |
| CN110671877A (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 |
| 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 |
| CN110822806A (en) * | 2019-10-12 | 2020-02-21 | 珠海格力电器股份有限公司 | Control method for supercooling semi-freezing storage and refrigerator |
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