Patent Description:
Frozen food materials can maintain the freshness, nutritional value and original flavor to the maximum extent in the cryopreservation process. There are two main ways to preserve frozen food materials in traditional refrigerators. One is long-term low-temperature storage at -<NUM> to -<NUM>, and the other is short-term soft freezing storage at about -<NUM>. However, when undergoing long-term low-temperature storage, a food material needs to be thawed for a long time before it is handled, which is inconvenient for a user to handle the food material quickly; and when the food material undergoes short-term soft freezing storage, there would be problems of long time for the food material to undergo an ice crystal zone during freezing, poor preservation effect and short storage time. Therefore, there is an urgent need to provide a solution for storing a frozen food material in a refrigerator that has a short-term soft freezing storage function of enabling the food material to quickly undergo the ice crystal zone and to be ready to eat.

Prior art <CIT> provides a refrigerator with a variable temperature chamber. The variable temperature chamber is internally provided with a weight detection module, a temperature detection module and a temperature control module, wherein the weight detection module is used for detecting the weight of objects stored in the variable temperature chamber; the temperature detection module is used for detecting the temperature in the variable temperature chamber; and the temperature control module is configured to receive a user-selected working mode of the variable temperature chamber, determine a corresponding temperature control curve according to a current working mode of the variable temperature chamber and the weight of the objects, and heat or cool according to the relationship between thereal-time temperature in the variable temperature chamber and the corresponding temperature control curve. The refrigerator can be utilized to accurately control the power of a temperature adjustment module according to the temperature control curve, so that the time for the variable temperature chamber to reach a target temperature corresponding to the mode is controllable and the working effect of the variable temperature chamber is better.

<CIT> relates to a refrigerator and a method for controlling an operation by estimating the thermal capacity of a product. The refrigerator for controlling an operation thereof by estimating the thermal capacity of a product, according to one embodiment of the present invention, comprises: at least one partitioned storage space; a camera for photographing a product stored in the storage space; a controller for estimating the thermal capacity of the product on the basis of an image taken by the camera and setting an operation phase of the refrigerator on the basis of the estimation result; and a compressor for providing cooling capacity to the refrigerator on the basis of the setting of the controller.

<CIT> provides a refrigerator. The refrigerator comprises a box body, a refrigerating door body, a temperature-variable door body, a freezing door body and an unfreezing device. A refrigerating chamber, a temperature-variable chamber and a freezing chamber are defined in the box body. The refrigerating door body, the temperature-variable door body and the freezing door body are used for opening and closing a picking and placing opening of the refrigerating chamber, a picking and placing opening of the temperature-variable chamber and a picking and placing opening of the freezing chamber correspondingly. The unfreezing device comprises a barrel, a device door body, a radio frequency generation module and a radio frequency antenna. An unfreezing cavity used for containing a to-be-processed object is defined in the barrel. The device door body is used for opening and closing a picking and placing opening of the unfreezing cavity. The radio frequency antenna is electrically connected with the radio frequency generation module. The radio frequency antenna is configured to generate radio frequency waves with the corresponding frequency in the unfreezing cavity according to a radio frequency signal to unfreeze the to-be-processed object in the unfreezing cavity. The unfreezing device is arranged in the freezing chamber. According to the refrigerator, the unfreezing device is specially arranged in the freezing chamber, users can take out and put back the to-be-processed object without opening the door bodies of the other chambers, and the convenience of to-be-processed object picking and placing is improved for the users.

Further relevant prior art can be found in <CIT>.

One objective of the present invention is to overcome at least one technical defect of the prior art and to provide a refrigerator preservation control method and a refrigerator that have both the advantage of enabling a food material to quickly undergo an ice crystal zone and the advantage of enabling the food material to be ready to eat.

One further objective of the present invention is to control the refrigerator to operate in different operating modes according to differences in the temperature of a food material, thereby achieving instant preservation of the food material.

Another further objective of the present invention is to separate a freezer preservation area to reduce the refrigeration influence of other spaces in the storage compartment on the freezer preservation area.

The present invention is defined by claims <NUM> and <NUM>.

The present invention provides the refrigerator preservation control method and the refrigerator. In the refrigerator preservation control method provided in the present invention, the temperature of the object to be handled placed in the freezer preservation chamber is detected, thus the refrigerator is controlled to operate in different operating modes according to differences in the temperature of the object to be handled, thereby achieving instant preservation.

Further, in the present invention, the preset safe temperature threshold value is set to be lower than the second preset temperature threshold value, thus it can be guaranteed that both the inside and outside of the food material may undergo the ice crystal zone quickly, thereby achieving a better preservation effect.

Further, in the present invention, by arranging the at least one thermal baffle, the freezer preservation area can be separated in the storage compartment where the freezer preservation chamber is located, and then the freezer preservation chamber is arranged in the freezer preservation area, which may effectively isolate heat exchange between the freezer preservation chamber and other spaces in the storage compartment and reduce the refrigeration influence of other spaces on the freezer preservation chamber.

These and other objectives, advantages and features of the present invention will be better understood by those skilled in the art in the light of the detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings below.

Some specific embodiments of the present invention will be described below in detail in an exemplary rather than a limiting manner with reference to the accompanying drawings. Identical reference numerals in the accompanying drawings indicate identical or similar components or parts. It should be understood by those skilled in the art that these accompanying drawings are not necessarily drawn to scale. In the accompanying drawings:.

<FIG> is a schematic section view of a refrigerator <NUM> according to an embodiment of the present invention, showing a flow path of cold airflow for refrigerating a storage area and a freezer preservation area. Referring to <FIG>, the refrigerator <NUM> includes a cabinet <NUM>, a freezer preservation chamber <NUM> and a control module.

The cabinet <NUM> defines at least one storage compartment. In the illustrated embodiment, the cabinet <NUM> defines two storage compartments. Both of the storage compartments are opened forwards. In some other embodiments, the storage compartments may also be opened upwards.

The freezer preservation chamber <NUM> is arranged in the at least one storage compartment. In the case where the cabinet <NUM> define two storage compartments, the at least one storage compartment may include a refrigerating compartment and a freezing compartment. As known to those skilled in the art, the refrigerating compartment refers to a storage compartment where the preservation temperature of food materials is <NUM> to <NUM>; and the freezing compartment refers to a storage compartment where the preservation temperature of the food materials is -<NUM> to -<NUM>. The freezer preservation chamber <NUM> may be arranged in the refrigerating compartment, so as to reduce the impact of thawing or maintaining soft freezing temperature on the food materials preserved in the storage compartment.

Further, the refrigerator <NUM> may further include at least one thermal baffle <NUM>, which is arranged in one storage compartment together with the freezer preservation chamber <NUM> and configured to separate a freezer preservation area <NUM> in the storage compartment. The freezer preservation chamber <NUM> is arranged in the freezer preservation area <NUM>. In the illustrated embodiment, the thermal baffles <NUM> are all arranged to extend in a horizontal direction. In the embodiments of the present invention, by arranging the thermal baffles <NUM>, the storage compartment where the freezer preservation chamber <NUM> is located may be separated into the freezer preservation area <NUM> and at least one storage area <NUM>, and then the freezer preservation chamber <NUM> is arranged in the freezer preservation area <NUM>, which may effectively isolate heat exchange between the freezer preservation chamber <NUM> and other storage areas <NUM> in the storage compartment and reduce the refrigeration influence of other storage areas <NUM> on the freezer preservation chamber <NUM>. The freezer preservation area <NUM> may be arranged below the at least one storage area <NUM>.

In some other embodiments, the refrigerator <NUM> may further be provided with thermal baffles that extend in a vertical direction, and the thermal baffles extending in the horizontal direction and the thermal baffles extending in the vertical direction may be peripherally arranged on the outer side of the freezer preservation chamber <NUM> in an end-to-end connection mode. Therefore, the heat exchange between the freezer preservation chamber <NUM> and other storage areas <NUM> in the storage compartment may be further isolated, thereby ensuring the thermal insulation property of the freezer preservation chamber.

The control module includes a memory and a processor. The memory stores a control program, and when being executed by the processor, the control program is used for implementing the refrigerator preservation control method according to the present invention. The control module may be arranged on an electrical control panel of the refrigerator to facilitate installation and maintenance of the control module.

The refrigerator <NUM> includes a temperature sensor. The temperature sensor is arranged on an inner wall of the freezer preservation chamber <NUM> to sense whether an object to be handled is placed in the freezer preservation chamber <NUM>, and detect the temperature of the object to be handled when sensing the object to be handled. By arranging the temperature sensor on the inner wall of the freezer preservation chamber <NUM>, the accuracy of temperature detection of the object to be handled can be improved.

The refrigerator <NUM> further includes a heating unit and a refrigeration unit. The refrigeration unit is configured to refrigerate the freezer preservation chamber <NUM>, so as to freeze the object to be handled placed in the freezer preservation chamber <NUM>. Specifically, the refrigeration unit may include a compressor, a condenser, a throttling element and an evaporator. The heating unit is configured to heat the freezer preservation chamber <NUM>, so as to thaw the frozen object to be handled. Specifically, the heating unit may include an electromagnetic wave generation system which is at least partially arranged in the freezer preservation chamber <NUM> or communicated to the inside of the freezer preservation chamber <NUM> to generate electromagnetic waves to thaw the object to be handled. The electromagnetic wave generation system may be at least partially arranged on the outer side of the cabinet <NUM> to avoid fluctuations in the temperature of the compartment caused by the generated heat. The outer side of the cabinet <NUM> herein refers to the side of the cabinet <NUM> exposed to ambient air, and the inner side of the cabinet <NUM> refers to the storage compartment.

The electromagnetic wave generation system may include an electromagnetic wave generation module, configured to generate an electromagnetic wave signal; a power supply module, electrically connected with the electromagnetic wave generation module and configured to supply electric energy to the electromagnetic wave generation module to make the electromagnetic wave generation module generate the electromagnetic wave signal; a radiating antenna, electrically connected with the electromagnetic wave generation module and configured to radiate electromagnetic waves at a corresponding frequency according to the electromagnetic wave signal to thaw the object to be handled in the freezer preservation chamber <NUM>; and a signal processing and measurement and control circuit, configured to detect characteristic parameters of the electromagnetic waves.

The electromagnetic wave generation module and the power supply module may be arranged on the outer side of the cabinet <NUM>. The signal processing and measurement and control circuit may be arranged at the bottom of the freezer preservation chamber <NUM>. The signal processing and measurement and control circuit may be integrated on a circuit board, so as to facilitate installation and maintenance of the signal processing and measurement and control circuit.

In some embodiments, the refrigerator <NUM> may be an air-cooled refrigerator. Each storage compartment may be internally provided with an air duct cover plate <NUM> respectively, so as to separate a refrigeration air duct <NUM> in the inside of each storage compartment. Each refrigeration air duct <NUM> may be provided with an evaporator <NUM> and a refrigeration fan <NUM> respectively, so as to enable the refrigeration unit to refrigerate one of the storage compartments separately. Of course, in the case where the cabinet defines a plurality of storage compartments, an evaporator <NUM> and a refrigeration fan <NUM> may also be arranged in only one of the refrigeration air ducts <NUM>, and the refrigeration air duct <NUM> where the evaporator <NUM> is located selectively communicates with other refrigeration air ducts <NUM>. In this embodiment, the refrigeration air duct <NUM> where the evaporator <NUM> is located selectively communicates with other refrigeration air ducts <NUM>, thus the refrigeration unit may only refrigerate the storage compartment where the evaporator <NUM> is located or refrigerate a plurality of storage compartments at the same time.

At least one air supply outlet <NUM> and an air return inlet <NUM> may be formed in each air duct cover plate <NUM>, so as to circulate air in the storage compartment for refrigeration. There may be a plurality of air supply outlets <NUM>. An air supply outlet <NUM> and an air return inlet <NUM> may be formed in the freezer preservation chamber <NUM>, so as to circulate air in the freezer preservation chamber <NUM> for refrigeration. The air return inlet <NUM> may be formed below the plurality of air supply outlets <NUM>, so as to make refrigeration more adequate.

In some other embodiments, the refrigerator <NUM> may also be a direct cooling refrigerator. That is, each storage compartment may be provided with an evaporator <NUM> and cold is transferred by means of natural convection.

<FIG> is a schematic section view of the air duct cover plate <NUM> according to an embodiment of the present invention. Referring to <FIG>, in some embodiments, the air duct cover plate <NUM> may be clamped into the rear wall of the storage compartment to from an air return portion of the refrigeration air duct <NUM>, and the evaporator <NUM> may be arranged in the air return portion. The air duct cover plate <NUM> itself may be provided with at least one air supply portion of a compartment duct, and each air supply portion may be provided with at least one air supply outlet <NUM> and an air inlet <NUM>.

The air duct cover plate <NUM> may also be provided with a volute <NUM> for containing the refrigeration fan <NUM>. The volute <NUM> is configured to be rotatable and to make its air outlet in butt joint with the air inlet <NUM> of one air supply portion, so as to convey cold airflow refrigerated by the evaporator <NUM> to the air supply portion and blow it out from the air supply outlet <NUM> of the air supply portion.

<FIG> is a schematic diagram of a refrigerator preservation control method according to an embodiment of the present invention. Referring to <FIG>, the refrigerator preservation control method provided in this embodiment may include steps S302 to S308. The refrigerator <NUM> includes a cabinet <NUM>, a freezer preservation chamber <NUM> and a control module. The cabinet <NUM> defines at least one storage compartment. The freezer preservation chamber <NUM> is arranged in the at least one storage compartment. The control module includes a memory and a processor. The memory stores a control program, and when being executed by the processor, the control program is used for implementing the refrigerator preservation control method according to the present invention.

Step S302, whether an object to be handled is placed in the freezer preservation chamber is detected, the object to be handled referring to a food material needs to be kept fresh in the refrigerator.

Step S304, if yes, the temperature of the object to be handled is acquired. The temperature of the object to be handled may be a surface temperature of the object to be handled.

Step S306, a preset correspondence between temperatures of the object to be handled and operating modes of the refrigerator is acquired.

Step S308, the refrigerator <NUM> is controlled to operate in an operating mode corresponding to the acquired temperature of the object to be handled.

In the present invention, the temperature of the object to be handled placed in the freezer preservation chamber is detected, and the refrigerator <NUM> is controlled to operate in different operating modes according to differences in the temperature of the object to be handled, thereby achieving instant preservation of the food material in the refrigerator <NUM>.

The refrigerator <NUM> includes a temperature sensor arranged on an inner wall of the freezer preservation chamber <NUM>. In this embodiment, step S302 may include sensing whether the object to be handled is placed in the freezer preservation chamber by means of the temperature sensor, and detecting the temperature of the object to be handled when sensing the object to be handled.

The operating modes include a quick freezing mode and a quick thawing mode. The quick freezing mode is configured to refrigerate the freezer preservation chamber <NUM> to reduce the temperature of the object to be handled. The quick thawing mode is configured to thaw the freezer preservation chamber <NUM> to increase the temperature of the object to be handled. The operating modes may further include a preservation mode. The preservation mode may be configured to maintain the temperature of the freezer preservation chamber <NUM> at a preset preservation temperature threshold value.

When the refrigerator <NUM> operates in the quick freezing mode, the refrigeration unit may refrigerate the freezer preservation chamber <NUM> separately by rotating the volute. In this case, the air volume entering the freezer preservation chamber <NUM> increases, such that the inside of a food material placed in the freezer preservation chamber <NUM> undergoes an ice crystal zone quickly, which is conducive to the improvement of the preservation effect.

When the refrigerator <NUM> operates in the quick thawing mode, the freezer preservation chamber <NUM> is heated by means of the heating unit, so as to increase the temperature of the freezer preservation chamber <NUM>, such that the temperature of the food material placed in the freezer preservation chamber <NUM> can increase, thereby thawing the frozen food material.

Before performing step S306, in some embodiments, the correspondence between the temperatures of the object to be handled and the operating modes may be pre-established, and may be stored in the control module, and thus after acquiring the current temperature of the object to be handled, the control module determines an operating mode corresponding to the current temperature of the object to be handled according to the pre-established correspondence between the temperatures of the object to be handled and the operating modes, and control the refrigerator <NUM> to operate in the determined operating mode. The refrigerator <NUM> of this embodiment may automatically enter into different operating modes according to differences in the temperature of the object to be handled, which makes the preservation control method of the food material more flexible, thereby achieving a better preservation effect.

Step S308 includes: controlling, when the temperature of the object to be handled is greater than a first preset temperature threshold value, the refrigerator <NUM> to operate in the quick freezing mode; and controlling, when the temperature of the object to be handled is lower than a second preset temperature threshold value, the refrigerator <NUM> to operate in the quick thawing mode. The first preset temperature threshold value is set to be greater than the second preset temperature threshold value.

In some other embodiments, the operating modes may further include the preservation mode. The preservation mode may be configured to maintain the temperature of the freezer preservation chamber at the preset preservation temperature threshold value. The preset preservation temperature threshold value may be set between the first preset temperature threshold value and the second preset temperature threshold value. In this case, the step of controlling the refrigerator <NUM> to operate in the operating mode corresponding to the temperature of the object to be handled may also include: controlling, when the temperature of the object to be handled is greater than or equal to the second preset temperature threshold value but lower than or equal to the first preset temperature threshold value, the refrigerator <NUM> to operate in the preservation mode.

It should be noted that, the first preset temperature threshold value, the second preset temperature threshold value and the preset preservation temperature threshold value may be experimentally determined according to preservation effects of the food material at different temperatures.

Exemplarily, if the first preset temperature threshold value may be set to <NUM> and the second preset temperature threshold value may be set to -<NUM>, then the preset preservation temperature threshold value is set to -<NUM>. It should be noted that, although the first preset temperature threshold value, the second preset temperature threshold value and the preset preservation temperature threshold value set in the exemplary embodiment are point values, the first preset temperature threshold value, the second preset temperature threshold value and the preset preservation temperature threshold value in the present invention are all not limited to point values, and in some embodiments, the first preset temperature threshold value, the second preset temperature threshold value and the preset preservation temperature threshold value may also be set to different threshold value ranges, respectively.

Considering that the freezing of food materials is done by carrying out heat exchange between cold air of the compartment and the outer surfaces of the food materials, and then slowly conducting heat for freezing from the outside to the inside, and for different kinds of food materials, or food materials with relatively large differences in boundary dimension, the freezing temperatures required to achieve the freezing of both the insides and the outsides of the food materials within the same time range are different, in order to avoid excessive freezing, a safe temperature may be set, so as to ensure that both the insides and the outsides of the food materials have quickly undergone the ice crystal zone, thereby guaranteeing the preservation effect. With respect to this case, in some embodiments, in the process that the refrigerator <NUM> operates in the quick freezing mode, if the temperature of the object to be handled decreases to a preset safe temperature threshold value, the refrigerator <NUM> may be controlled to operate in the quick thawing mode, so as to increase the temperature of the freezer preservation chamber <NUM> quickly, thereby quickly thawing the object to be handled. At this moment, if the temperature of the object to be handled increases to the preset preservation temperature threshold value, the refrigerator <NUM> is controlled to operate in the preservation mode.

The preset safe temperature threshold value may be set to be lower than the second preset temperature threshold value. The preset safe temperature threshold value may be experimentally determined according to preservation effects of the food material at different temperatures. In some further embodiments, the preset safe temperature threshold value may be set to be lower than -<NUM> but greater than or equal to -<NUM>.

Exemplarily, in the case where the second preset temperature threshold value is set to -<NUM>, the preset safe temperature threshold value may be set to -<NUM>. In the present invention, by setting the preset safe temperature threshold value to be lower than the second preset temperature threshold value, it may be guaranteed that both the inside and the outside of the food material may undergo the ice crystal zone quickly, thereby achieving a better preservation effect.

Considering that there are high and low temperatures of objects to be handled currently placed in the freezer preservation chamber <NUM>, in order to achieve a good preservation effect, the control mode may be flexibly adjusted according to differences in the temperature of the food material placed in the freezer preservation chamber. For example, when the temperature of the object to be handled currently placed in the freezer preservation chamber <NUM> is relatively low, the temperature of the object to be handled and the second preset temperature threshold value may be compared firstly. If the temperature of the object to be handled is lower than the second preset temperature threshold value, the refrigerator <NUM> may be controlled to operate in the quick thawing mode. If the temperature of the object to be handled is greater than or equal to the second preset temperature threshold value, whether the temperature of the object to be handled is lower than or equal to the first preset temperature threshold value may be further determined. If yes, the refrigerator <NUM> is controlled to operate in the preservation mode, and if no, the refrigerator <NUM> is controlled to operate in the quick freezing mode. For another example, if the temperature of the food material placed into the freezer preservation chamber <NUM> by a user has been already at a soft freezing temperature, the refrigerator <NUM> may be controlled to operate in the preservation mode.

In some embodiments, in the process that the refrigerator <NUM> operates in the quick thawing mode, if the temperature of the object to be handled increases to the preset preservation temperature threshold value, the refrigerator <NUM> is controlled to operate in the preservation mode, so as to maintain the temperature inside the freezer preservation chamber <NUM> at the preset preservation temperature threshold value, thereby carrying out soft freezing storage on the object to be handled.

Illustration will be carried out below by taking an example that the first preset temperature threshold value may be set to <NUM>, the second preset temperature threshold value may be set to -<NUM>, the preset preservation temperature threshold value is set to -<NUM>, and the preset safe temperature threshold value may be set to -<NUM>.

When an object to be handled is placed in the freezer preservation chamber <NUM>, the temperature of the object to be handled currently placed in the freezer preservation chamber <NUM> may be detected by means of the temperature sensor arranged on the inner wall of the freezer preservation chamber <NUM>, which is denoted as T. Next, T may be compared with <NUM>, -<NUM> and -<NUM>, respectively to obtain the comparison results that T is greater than <NUM>, T is greater than or equal to -<NUM> but lower than or equal to <NUM>, and T is lower than -<NUM>.

If T is greater than <NUM>, the refrigerator <NUM> is controlled to operate in the quick freezing mode, so as to make T quickly decrease to -<NUM>. Then, the refrigerator <NUM> is controlled to operate in the quick thawing mode, so as to make T which has decreased to -<NUM> increase to -<NUM> quickly. Later, the refrigerator <NUM> is controlled to operate in the preservation mode, so as to keep T which has increased to -<NUM> at -<NUM>.

If T is greater than or equal to -<NUM> but lower than or equal to <NUM>, the refrigerator may be controlled to operate in the preservation mode, so as to keep T at -<NUM>.

If T is lower than -<NUM>, the refrigerator may be controlled to operate in the quick thawing mode, so as to make T quickly increase to -<NUM>. Later, the refrigerator <NUM> is controlled to operate in the preservation mode, so as to keep T which has increased to -<NUM> at -<NUM>.

<FIG> is a flow chart of a refrigerator preservation control method according to another embodiment of the present invention. Referring to <FIG>, the refrigerator preservation control method provided in this embodiment may include steps S402 to S416.

Step S402, whether an object to be handled is placed in a freezer preservation chamber is detected; if yes, step S404 is performed; and if no, step S402 continues to be performed.

Step S404, the temperature of the object to be handled placed in the freezer preservation chamber is detected.

Step S406, whether the temperature of the object to be handled is greater than a first preset temperature threshold value is determined; if yes, step S408 is performed; and if no, step S418 is performed.

Step S408, a refrigerator is controlled to operate in a quick freezing mode.

Step S410, whether the temperature of the object to be handled decreases to a preset safe temperature threshold value is determined; if yes, step S412 is performed; and if no, step S408 is performed.

Step S412, the refrigerator is controlled to operate in a quick thawing mode.

Step S414, whether the temperature of the object to be handled increases to a preset preservation temperature threshold value is determined; if yes, step S416 is performed; and if no, step S412 continues to be performed.

Step S416, the refrigerator is controlled to operate in a preservation mode.

Step S418, whether the temperature of the object to be handled is greater than or equal to a second preset temperature threshold value is determined; if yes, step S416 is performed; and if no, step S412 continues to be performed.

The embodiments of the present invention provide the refrigerator preservation control method and the refrigerator. In the refrigerator preservation control method provided in the present invention, the temperature of the object to be handled placed in the freezer preservation chamber is detected, thus the refrigerator <NUM> is controlled to operate in different operating modes according to differences in the temperature of the object to be handled, thereby achieving instant preservation.

Claim 1:
A refrigerator (<NUM>) preservation control method, wherein a refrigerator (<NUM>) comprises a cabinet (<NUM>), in which is defined at least one storage compartment; and a freezer preservation chamber (<NUM>), arranged in the at least one storage compartment; and the method comprises:
detecting whether an object to be handled is placed in the freezer preservation chamber (<NUM>);
if yes, acquiring the temperature of the object to be handled;
acquiring a preset correspondence between temperatures of the object to be handled and operating modes of the refrigerator (<NUM>); and
controlling the refrigerator (<NUM>) to operate in an operating mode corresponding to the acquired temperature of the object to be handled, wherein
the operating modes comprise a quick freezing mode, configured to refrigerate the freezer preservation chamber (<NUM>) to reduce the temperature of the object to be handled; and a quick thawing mode, configured to thaw the freezer preservation chamber (<NUM>) to increase the temperature of the object to be handled; and
the step of controlling the refrigerator (<NUM>) to operate in the operating mode corresponding to the temperature of the object to be handled comprises: controlling, when the temperature of the object to be handled is greater than a first preset temperature threshold value, the refrigerator (<NUM>) to operate in the quick freezing mode; and controlling, when the temperature of the object to be handled is lower than a second preset temperature threshold value, the refrigerator (<NUM>) to operate in the quick thawing mode, the first preset temperature threshold value being greater than the second reset temperature threshold value.