CN110953820B

CN110953820B - Control method for instant freezing storage and refrigerator

Info

Publication number: CN110953820B
Application number: CN201911046374.6A
Authority: CN
Inventors: 钱梅双; 辛海亚; 胡卓鸣; 沈龙
Original assignee: Gree Electric Appliances Inc of Zhuhai; Hefei Kinghome Electrical Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Hefei Kinghome Electrical Co Ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2023-06-13
Anticipated expiration: 2039-10-30
Also published as: CN110953820A

Abstract

The invention relates to a control method for instantaneous freezing storage and a refrigerator, which realize the instantaneous freezing storage of a cooled object by performing three processes of supercooling and cooling, supercooling and removing and conventional refrigerating and preserving on the cooled object. After the cooling object stably enters the supercooling state, the supercooling is relieved by adopting a mode of combining the reduction of capillary flow, the increase of the rotating speed of a condenser fan and the application of physical oscillation to the cooling object, so that the cooling object quickly passes through the maximum ice crystal zone, the instant freezing of the cooling object is realized, the cooling object is well cut after being taken out in the conventional refrigerating and preserving process, the nutrition loss caused by the fact that a large amount of juice of the cooling object flows out is avoided, and the storage requirement of a user can be met.

Description

Control method for instant freezing storage and refrigerator

Technical Field

The invention relates to a refrigerator control method and a refrigerator, in particular to a control method for instant freezing storage and a refrigerator.

Background

In order to better maintain the nutrition of frozen food, the food is generally preserved by adopting a freezing mode such as common freezing, quick freezing and the like and a supercooling mode, and the traditional common freezing has the defects of uneven temperature control in a freezing chamber, long-time stay in a maximum ice crystal generation zone and the like; although the rapid freezing can rapidly pass through the largest ice crystal generation zone, the production cost is higher, and the rapid freezing is not beneficial to popularization and application on a refrigerator; in the prior art, the problems that the supercooling is released in advance due to uneven temperature reduction in the supercooling and cooling process, the supercooling cannot be stably performed, the supercooling depth is shallow, the supercooling release effect is poor due to the increase of the wind speed or the wind quantity, and the like are caused, and the problems that the food nutrition loss, the flavor is poor, the quality is reduced, the user needs cannot be met and the like are further caused.

Disclosure of Invention

According to the invention, through stage cooling control on the cooling object in the supercooling cooling stage, supercooling is released by adopting a mode of combining the three modes of changing capillary flow, increasing the rotating speed of the condenser fan and applying physical oscillation to the cooling object, the cooling object is kept in a good-cut state in the conventional refrigerating process, no complex operation is required, uniform reduction of the temperature of the cooling object in the instant freezing process can be realized, nutrition preservation is good, and quality is not reduced.

Specifically:

the invention provides a transient freezing storage method, which is provided with a supercooling cooling process, a supercooling releasing process and a conventional refrigerating storage process in the transient freezing storage process, wherein:

s1: cooling the cooling object in stages to enable the cooling object to enter a supercooling state;

s2: in the supercooling removing process, the supercooling state of the cooling object is removed by adopting a mode of combining the three modes of reducing capillary flow, increasing the rotating speed of a condenser fan and applying physical oscillation to the cooling object;

s3: and in the conventional refrigeration preservation process, conventional refrigeration preservation is carried out on the cooling object after supercooling is released.

The invention also provides a refrigerator control method, the refrigerator is provided with a compartment with a transient freezing storage function, and during the transient freezing storage period, the compartment is subjected to the following transient freezing control:

s2: the supercooling removing process is carried out, and the supercooling state of the cooling object is removed by adopting a mode of combining the three modes of reducing the capillary flow, increasing the rotating speed of the condenser fan and applying physical oscillation to the cooling object;

s3: and performing a conventional refrigeration preservation process, and performing conventional refrigeration preservation on the cooling object after supercooling release.

Preferably, each stage of the supercooling stage cooling process adopts intermittent air supply, and when the supercooling stage cooling process is in the nth stage: the storage temperature of the instant freezing chamber reaches T _ON n＝Tn+T _B1 And/2, opening the air door of the instant freezing compartment; the storage temperature of the instant freezing chamber reaches T _off n＝T _ON n-T _B2 At time/2, the instant freezing roomThe chamber damper is closed, where Tn refers to the preset temperature of the nth stage; t (T) _B1 Refers to the floating temperature T of the starting point of the instant freezing compartment in the starting process of the compressor _B2 The temperature difference, T, between the start and stop of the instant freezing room _ON n>Tn>T _off n。

Preferably, the supercooling cooling process S1 includes:

s11: the temperature of the instant freezing compartment is regulated by taking T1 as a target, the duration of a preset cooling step S11 is a first cooling time T1, a timing unit is adopted for timing, and in the time T1, when the temperature of the instant freezing compartment reaches a first starting temperature point T _ON1 When the temperature of the instant freezing room reaches the first stop temperature point T, the air door of the instant freezing room is opened _OFF1 Closing the damper of the instant freezing chamber, wherein T _ON1 ＝T1+T _B1 /2,T _OFF1 ＝T _ON1 –T _B2 And (2) stopping executing the step S11 when the accumulated time length of the timing unit reaches t 1;

s12: presetting a second cooling target of a cooling object as T2, enabling the temperature of the instant freezing compartment to be adjusted and cooled by taking the T2 as the target, presetting the duration of a cooling step S12 as a second cooling time T2, timing by adopting a timing unit, and when the temperature of the instant freezing compartment reaches a second starting temperature point T in the time T2 _ON2 When the temperature of the instant freezing room reaches the second stop temperature point T, the air door of the instant freezing room is opened _OFF2 Closing the damper of the instant freezing chamber, wherein T _ON2 ＝T2+T _B1 /2,T _OFF2 ＝T _ON2 –T _B2 And/2, stopping executing the step S12 when the accumulated time length of the timing unit reaches t 2;

sequentially cooling step by step until S1 n;

s1n: presetting an nth cooling target of a cooling object as Tn, enabling the temperature of the instant freezing compartment to be adjusted and cooled by taking Tn as the target, presetting the duration of a cooling step S1n as nth cooling time Tn, timing by adopting a timing unit, and when the temperature of the instant freezing compartment reaches an nth starting temperature point T in Tn time _ONn When the temperature of the instant freezing room reaches the nth stop temperature point T, the air door of the instant freezing room is opened _OFFn Closing the damper of the instant freezing chamber, wherein T _ONn ＝Tn+T _B1 /2,T _OFFn ＝T _ONn –T _B2 And (2), wherein n is more than or equal to 1, n is a natural number, and when the accumulated time length of the timing unit reaches tn, the execution of the step S1n is stopped.

Preferably, the first cooling target of the cooling object is preset to be T1 according to the type, volume, weight and external environment temperature of the cooling object.

Preferably, T1 ranges from 0 ℃ to 5 ℃ and T1 ranges from 2 hours to 4 hours.

Preferably, the final cooling target range of the supercooling cooling process is-5 ℃ to-20 ℃, and the cooling temperature difference range between each step in the steps S12 to S1n is 0 ℃ to 2 ℃ but not 0 ℃.

Preferably, the supercooling release process S2: starting the oscillating device, reducing the capillary flow and increasing the rotating speed of the condenser fan at the same time, so that the supercooling state of the cooling object is relieved, the starting time of the oscillating device is preset to be t ', the duration of the step S2 is preset to be t, the time of t ' and t is respectively counted by adopting the timing unit, when the accumulated time of the timing unit reaches t ', the oscillating device is closed, and when the accumulated time of the timing unit reaches t, the executing of the step S2 is stopped, and the range of t ' and t is more than or equal to 10h and more than or equal to t ' and more than 0h.

Preferably, the oscillating device is a mechanical physical oscillating device, and the applied oscillating frequency ranges from 50 times/min to 60 times/min.

Preferably, in S11, the rotation speed of the compressor is set to M2, the rotation speed of the condenser fan is set to P1, and the capillary flow is set to V1; in S12-S1 n, the rotation speed of the compressor is set as M1, the rotation speed of the condenser fan is set as P1, and the capillary flow is set as V1; in S2, the rotation speed of the compressor is set as M1, the rotation speed of the condenser fan is set as P2, and the capillary flow is set as V2; wherein M2> M1, P2> P1, V2 < V1.

Preferably, P2 is the maximum condenser fan speed.

Preferably, the conventional refrigeration preservation process S3: the conventional refrigeration preservation temperature of the preset cooling object is T, and when the temperature of the instant freezing room reaches the conventional refrigeration preservation starting temperature point T _ON When the temperature of the instant freezing room reaches the normal refrigerating storage stop temperature point T, the air door of the instant freezing room is opened _OFF Closing the damper of the instant freezing chamber, wherein T _ON ＝T+T _B1 /2,T _OFF ＝T _ON –T _B2 /2。

Preferably, in the normal refrigeration and preservation process S3, the rotation speed of the compressor is set to M1, the rotation speed of the condenser fan is set to P1, and the capillary flow is set to V1.

Preferably, M1 ranges from 1200rpm to 1400rpm, M2 ranges from 3800rpm to 4500rpm, V1 ranges from 4.5L/min to 5L/min, V2 ranges from 2L/min to 3L/min, P1 ranges from 1200rpm to 1500rpm, and P2 ranges from 1600rpm to 1900rpm.

The invention also provides a control system, and the control method provided by the invention is adopted.

Preferably, the control system comprises: controller, temperature regulating device, temperature sensor, timing unit, its characterized in that: the controller receives information from the temperature sensor and the timing unit and controls the temperature regulating device to regulate the temperature of the instant freezer; the temperature adjusting device is used for adjusting the temperature of the instant freezer to enable the instant freezer to operate according to the preset temperature; the temperature sensor is used for detecting the temperature timing unit of the instant freezing compartment in real time and is used for setting and monitoring the duration.

In addition, the invention also provides a refrigerator provided with the instant freezing compartment, and the control system or the control method provided by the invention is adopted.

Preferably, the refrigerator further includes a refrigerating system for generating cool air supplied to the flash compartment.

The invention can lead the temperature of the cooling object to drop uniformly and uniformly, stably enter a supercooling state with proper depth, has good supercooling release effect, avoids nutrition loss caused by a large amount of juice of the cooling object flowing out, and can meet the storage requirement of users.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

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 examples of the present disclosure and other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic diagram of the control logic of embodiment 2 of the present invention;

fig. 2 is a schematic structural diagram of a refrigeration system according to

embodiments

1 and 2 of the present invention;

FIG. 3 is a schematic flow diagram of a refrigeration system according to

embodiments

1 and 2 of the present invention;

FIG. 4 is a schematic view showing a schematic structure of a refrigerator according to embodiment 1 of the present invention;

FIG. 5 is a schematic view showing the structure of a flash chamber in embodiment 1 of the present invention;

FIG. 6 is a control diagram of embodiment 2 of the present invention;

fig. 7 is a schematic diagram showing a change in temperature of a cooling object in embodiment 2 of the present invention.

In the accompanying drawings:

1-a refrigerating chamber; 2-a flash chamber; 21-a flash chamber drawer; 3-freezing chamber;

4-a refrigeration system; 41-a compressor; 42-a condenser; 43-anti-coagulation tube; 44-drying the filter; 45-an electric switching valve; 46-a first capillary; a second capillary 47; 48-a freezer evaporator; 49-an air return tube assembly; 410-a return air heat exchange section;

5-a control system; 51-a controller; 52-a display; 53-a temperature sensor; 54-temperature regulating device; 55-frequency conversion board; 56-a timing unit;

6-oscillating means.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the disclosed aspects may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.

The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.

It is to be understood that as used herein, the term "and/or" includes any one of the associated listed items and all combinations of one or more.

Those skilled in the art will appreciate that the drawings are schematic representations of example embodiments and that the modules or flows in the drawings are not necessarily required to practice the present disclosure, and therefore, should not be taken to limit the scope of the present disclosure.

The invention aims to provide a transient freezing storage method and a refrigerator for storing transient freezing of a cooling object, which can quickly remove a supercooling state to enable the cooling object to be frozen instantly after the cooling object stably enters the supercooling state, so that the transient freezing storage of the cooling object is realized, and the problems of uneven temperature drop, shallow supercooling depth, poor preservation effect of the cooling object after supercooling is removed, juice outflow, less nutrition maintenance and flavor and quality degradation are solved.

For further explanation, the present invention is exemplified by an air-cooled refrigerator, and the following specific examples are provided. The air-cooled refrigerator takes cold air as a carrier, and the rotating speed of the refrigerating fan can be kept unchanged in the storage process.

Example 1:

as shown in fig. 4, the present embodiment provides a flash storage refrigerator including:

the instant freezing chamber 2 has an instant freezing chamber drawer 21 for receiving and storing instant freezing of a cooling object.

A refrigerating system 4 for controllably supplying cool air to the flash chamber 2 to lower or maintain the temperature of the flash chamber 2 according to each preset temperature. The method specifically comprises the following steps: compressor 41, condenser 42, anti-condensation tube 43, dry filter 44, electric switching valve 45, first capillary tube 46, second capillary tube 47, freezing chamber evaporator 48, muffler assembly 49, and muffler heat exchange section 410.

The control system 5 is used for controlling the refrigerating system 4 to provide cool air for the instant freezing chamber 2, controlling the temperature regulating device 54 to regulate the temperature of the instant freezing chamber 2, enabling the temperature of the instant freezing chamber 2 to be reduced or kept according to the preset target temperature of each step, and realizing instant freezing storage of a cooling object.

And an oscillation device 6 for applying physical oscillation to the cooling object to release supercooling.

Preferably, the oscillating device 6 is a mechanical physical oscillating device, and the applied oscillating frequency ranges from 50 times/min to 60 times/min, and in this embodiment, the time interval is 1s, and the preferred time interval is 60 times/min.

Preferably, the oscillating device 6 is arranged on the side or bottom of the freezer drawer 21, in this embodiment the oscillating device 6 is preferably arranged on the side of the freezer drawer 21.

Specifically, when the cooling target needs to be released from the supercooled state, the oscillation device 6 is turned on, and the oscillation device 6 applies physical oscillation to the cooling target, and the cooling target is disturbed by the physical oscillation, so that the supercooled stable state is broken, and supercooled release is realized.

Preferably, the refrigerator further includes a condenser fan for enhancing a heat exchanging effect of the condenser.

Preferably, the rotation speed of the condenser fan is controlled by the control system 5 according to the preset cooling target temperature of each step, so that the amount of cold air finally entering the instant freezing chamber 2 is more when the rotation speed of the condenser fan is high than the amount of cold air entering the instant freezing chamber 2 when the rotation speed of the condenser fan is low.

Preferably, the control system 5 comprises: a controller 51, a built-in chip processor, for receiving information from the temperature sensor 53 and the timing unit 56, and controlling the temperature adjusting device 54 and the refrigerating system 4 to adjust the temperature of the flash chamber 2; a temperature adjusting device 54 for adjusting the temperature of the flash chamber 2 to operate according to a preset target temperature; a temperature sensor 53 for detecting the temperature of the flash chamber 2 in real time; a timing unit 56 for setting and monitoring time; a frequency conversion plate 55 for adjusting the rotation speed of the compressor 41; the display 52, there is a select button of the instant freezing function on the display 52 panel, the user can choose whether the cooling object needs to implement the instant freezing function.

Preferably, the timing unit 56 includes a timer a for counting the maintenance duration of each step in the instant freezing storage process, and a timer B for counting the on duration of the oscillating device 6.

Specifically, after the user puts the cooling object into the instant freezing chamber 2, the user presses an instant freezing function selection button on the refrigerator display 52 to store the instant freezing object. In the process of implementing the instant freezing storage, the control system 5 controls and regulates the compressor 41 in the refrigerating system 4 to operate at different rotating speeds according to preset target temperatures of each step to generate cold air finally supplied to the instant freezing chamber 2, and controls the electric switching valve 45 to switch to capillaries with different inner diameters so as to realize the change of the flow rate of the refrigerant in the flow path of the refrigerating system 4, thereby realizing the change of the temperature of the cold air supplied by the refrigerating system 4, specifically, the first capillary 46 has a flow rate V1 greater than the flow rate V2 of the second capillary 47, and the temperature of the cold air generated when the electric switching valve 45 is switched to the first capillary 46 is higher than the temperature of the cold air generated when the electric switching valve 45 is switched to the second capillary 47.

Preferably, the control system 5 changes the rotation speed of the compressor 41 through the inverter board 55, and the amount of cold air generated by the refrigeration system 4 when the rotation speed of the compressor 41 is high is larger than the amount of cold air generated when the rotation speed is low.

Preferably, the control system 5 controls the duration of each step in the instant freezing storage process by accumulating the time by the timer a in the time counting unit 56, specifically, presets the running duration of each step in the instant freezing storage process, and when the accumulated duration reaches the preset duration, the control system 5 controls the current step to stop and enter the next step.

Preferably, the temperature of the instant freezing chamber 2 is detected in real time through the temperature sensor 53, and in the implementation process of each step, when the temperature sensor 53 detects that the temperature of the instant freezing chamber 2 reaches the starting temperature point set in the step, the control system 5 controls the opening of a damper of the instant freezing chamber 2, so that cold air generated by the refrigerating system 4 enters the instant freezing chamber 2 to reduce the temperature of the instant freezing chamber 2; when the temperature sensor 53 detects that the temperature of the instant freezing chamber 2 reaches the shutdown temperature point set in the step, the control system 5 controls the air door of the instant freezing chamber 2 to be closed, and prevents cold air from entering the instant freezing chamber 2.

According to the embodiment, the temperature control of the instant freezing chamber 2 is realized through the control system 5, so that the cooling object is stored according to the preset temperature and the preset time length of each step in the instant freezing storage process, no complex operation is needed, the temperature of the cooling object is uniformly reduced in the instant freezing process, and nutrition and flavor are kept well.

Example 2:

as shown in fig. 1, the present embodiment provides a method for controlling a transient freeze storage, which includes:

s1: and (3) performing supercooling and cooling processes, and cooling the cooling object in stages to enable the cooling object to enter a supercooling state.

Specific:

s11: the duration of the preset step S11 is T1, the preset first cooling target of the cooling object is T1, and the temperature of the flash chamber 2 is adjusted with the T1 as the target, where the control system 5 controls the compressor 41 to operate at the rotation speed M2 through the inverter board 55, controls the condenser fan to operate at the rotation speed P1, and controls the electric switching valve 45 to switch to the first capillary tube 46, so that the capillary flow is V1. During the temperature adjustment, the temperature sensor 53 detects the real-time temperature inside the flash chamber 2, and when the temperature of the flash chamber 2 reaches the first start-up temperature point T _ON1 When the air door of the instant freezing chamber 2 is controlled to be opened, cold air generated by the refrigerating system 4 enters the instant freezing chamber 2, and the temperature of the cold air is reduced; when the temperature of the instant freezing chamber 2 is detected to reach the first stop temperature point T _OFF1 And when the air door of the instant freezing chamber 2 is controlled to be closed, the cold air is prevented from entering the instant freezing chamber 2. This step is performed by using the timer a in the timer unit 56, and when the accumulated time length of the timer a in the timer unit 56 reaches t1, the execution of step S11 is stopped.

Preferably, the first cooling target T1 may be set by the user or in a control program, and if set in the control program, the user may select in a menu bar of the refrigerator.

Preferably, the first start-up temperature point T _ON1 ＝T1+T _B1 First shutdown temperature point T _OFF1 ＝T _ON1 –T _B2 /2。

Preferably T _B1 Refers to the floating temperature of the starting point of the instant freezing chamber 2 in the starting process of the compressor 41; t (T) _B2 Refers to the temperature difference, T, of the instant freezing chamber 2 _B1 And T _B2 Is a known parameter, wherein T _B1 In the range of less than 0 ℃ T _B1 ,T _B2 In the range of T _B2 ≤2℃。

Preferably, the range of the first cooling target T1 is more than or equal to 0 ℃ and less than or equal to 5 ℃, and the duration T1 of the step S11 is more than or equal to 2h and less than or equal to 1 and less than or equal to 4h.

Preferably, if the temperature of the object to be cooled placed in the instant freezing chamber 2 is less than 0 ℃, the control system 5 in step S11 can adjust the temperature of the instant freezing chamber 2 to rise to a temperature above 0 ℃, which is conducive to uniform decrease of the entire temperature of the instant freezing chamber 2 in the subsequent step, and also makes uniform and uniform decrease of the internal and external temperatures of the object to be cooled.

S12: the duration of the preset step S12 is T2, the second cooling target of the cooling object is T2, and the temperature of the flash chamber 2 is adjusted with T2 as the target, wherein the control system 5 controls the compressor 41 to operate at the rotation speed M1 through the frequency conversion board 55, controls the condenser fan to operate at the rotation speed P1, and controls the electric switching valve 45 to keep being switched to the first capillary tube 46, so that the capillary tube flow is V1. During the temperature adjustment, the temperature sensor 53 detects the real-time temperature inside the flash chamber 2, and when the temperature of the flash chamber 2 reaches the second start-up temperature point T _ON2 When the air door of the instant freezing chamber 2 is controlled to be opened, cold air generated by the refrigerating system 4 enters the instant freezing chamber 2, and the temperature of the cold air is reduced; when the temperature of the instant freezing chamber 2 is detected to reach the second stop temperature point T _OFF2 When in use, the air door of the instant freezing chamber 2 is controlled to be closed to prevent cold air from enteringInto the flash chamber 2. This step is performed by using the timer a in the timer unit 56, and when the accumulated time length of the timer a in the timer unit 56 reaches t2, the execution of step S12 is stopped.

Preferably, the second start-up temperature point T _ON2 ＝T2+T _B1 /2, second shutdown temperature point T _OFF2 ＝T _ON2 –T _B2 /2。

Preferably, the range of the second cooling target T2 is more than or equal to minus 2 ℃ and less than 0 ℃, and the duration T2 of the step S12 is more than or equal to 2h and less than or equal to 4h.

S13: the duration of the preset step S13 is T3, the third cooling target of the preset cooling object is T3, and the temperature of the flash chamber 2 is adjusted with T3 as the target, wherein the control system 5 controls the compressor 41 to operate at the rotation speed M1 through the frequency conversion board 55, controls the condenser fan to operate at the rotation speed P1, and controls the electric switching valve 45 to keep being switched to the first capillary tube 46, so that the capillary tube flow is V1. In the temperature adjustment process, the temperature sensor 53 detects the real-time temperature inside the instant freezing chamber 2, and when the temperature of the instant freezing chamber 2 reaches the third starting temperature point T _ON3 When the air door of the instant freezing chamber 2 is controlled to be opened, cold air generated by the refrigerating system 4 enters the instant freezing chamber 2, and the temperature of the cold air is reduced; when the temperature of the instant freezing chamber 2 is detected to reach the third stop temperature point T _OFF3 And when the air door of the instant freezing chamber 2 is controlled to be closed, the cold air is prevented from entering the instant freezing chamber 2. This step is performed by using the timer a in the timer unit 56, and when the accumulated time length of the timer a in the timer unit 56 reaches t3, the execution of step S13 is stopped.

Preferably, the third start-up temperature point T _ON3 ＝T3+T _B1 /2, third shutdown temperature point T _OFF3 ＝T _ON3 –T _B2 /2。

Preferably, the range of the third cooling target T3 is minus 3 ℃ to minus T3 < -2 ℃, and the duration T3 of the step S13 is 2h to minus T3 to minus 4h.

Sequentially cooling step by step until S1 n;

s1n: presetting the duration of the step S1n as Tn, presetting the nth cooling target of the cooling object as Tn, and adjusting the temperature of the instant freezing chamber 2 with Tn as the target, wherein the control system 5 controls the compressor through the frequency conversion plate 5541 is operated at a rotation speed M1, the condenser fan is controlled to operate at a rotation speed P1, and the electric switching valve 45 is controlled to be kept switched to the first capillary tube 46, so that the capillary tube flow is V1. In the temperature adjustment process, the temperature sensor 53 detects the real-time temperature inside the instant freezing chamber 2, and when the temperature of the instant freezing chamber 2 reaches the nth starting temperature point T _ONn When the air door of the instant freezing chamber 2 is controlled to be opened, cold air generated by the refrigerating system 4 enters the instant freezing chamber 2, and the temperature of the cold air is reduced; when the temperature of the instant freezing chamber 2 is detected to reach the nth stop temperature point T _OFFn And when the air door of the instant freezing chamber 2 is controlled to be closed, the cold air is prevented from entering the instant freezing chamber 2. This step is performed by using the timer a in the timer unit 56, and when the accumulated time length of the timer a in the timer unit 56 reaches tn, the execution of step S1n is stopped.

Preferably, the nth start-up temperature point T _ONn ＝Tn+T _B1 2 nth shutdown temperature point T _OFFn ＝T _ONn –T _B2 /2。

Preferably, the range of the nth cooling target Tn is minus n ℃ less than or equal to- (n-1) DEG C, and the duration Tn of the step S1n is 2h less than or equal to Tn less than or equal to 4h.

Preferably, the final cooling target range of the supercooling cooling process is-5 ℃ to-20 ℃, the cooling temperature difference range between the steps adjacent to each other before and after in the steps S12-S1 n is 0 ℃ to 2 ℃ but not 0 ℃, and the duration time range of each step is 2h to 4h.

Preferably, n is greater than or equal to 1, n is a natural number, and the specific value of n is set according to the freezing point of the object to be cooled placed in the instant freezing chamber 2, so that the object to be cooled stably enters a supercooling state after the completion of the step S1n, and the supercooling depth is proper. In this embodiment, the object to be cooled placed in the freezing chamber 2 is preferably meat, and therefore n=5 is set so that the meat placed in the freezing chamber 2 is stabilized in the supercooled state.

The steps S12 to S1n can make the temperature of the cooling object drop uniformly, the supercooling depth is proper, the cooling state is stably entered, and the early release of supercooling is avoided.

S2: and in the supercooling releasing process, the supercooling state of the cooling object is released by adopting a mode of combining the three modes of reducing the capillary flow and increasing the rotating speed of the condenser fan and applying physical oscillation to the cooling object.

Specific:

s2: the duration of the preset step S2 is t, the opening time t ' of the oscillating device 6 is preset, the oscillating device 6 is opened, the cooling object is under the physical oscillation action, meanwhile, the control system 5 controls the compressor 41 to operate at the rotating speed M1 through the frequency conversion plate 55, controls the condenser fan to operate at the rotating speed P2, controls the electric switching valve 45 to switch to the second capillary tube 47, so that the capillary tube flow in the flow path of the refrigerating system 4 is changed from V1 to V2, in the process, the timing unit 56 is adopted to time the opening time t ' of the oscillating device 6 and the duration t of the step S2, when the accumulated time t ' of the timer B in the timing unit 56 is reached, the oscillating device 6 is closed, and when the accumulated time t of the timer a in the timing unit 56 is reached, the step S2 is stopped.

Preferably, the preset duration t of step S2 and the on-time t 'of the oscillating device 6 are in the range of 0 < t' < t < 10h.

Preferably, P1 is less than P2, and P2 is the maximum rotation speed of the condenser fan.

In step S2, the oscillation device 6 is turned on, physical oscillation stimulus is applied to the cooling object, the capillary flow is reduced, the temperature of the cold air generated by the refrigerating system 4 is reduced, the rotation speed of the condenser fan is increased, the cold air entering the instant freezing chamber 2 is increased, the low-temperature maximum cold air stimulus is applied to the cooling object, the cooling object quickly passes through the maximum ice crystal generating zone, the moisture in the cooling object instantaneously forms granular ice crystals with uniform size, the cell damage of the cooling object is avoided while the instant freezing of the cooling object is realized, the effect of removing the supercooling by adopting the combination of changing the capillary flow, increasing the rotation speed of the condenser fan and applying physical oscillation to the cooling object is better than the effect of removing the supercooling by only increasing the air quantity and the air speed, and the air drying of the cooling object is avoided.

Specific:

s3: the conventional refrigeration preservation temperature of the cooling object is preset as T, so that the temperature of the instant freezing chamber 2 is regulated with the T as a target, wherein the control system 5The compressor 41 is controlled to operate at a rotating speed M1 through the frequency conversion plate 55, the condenser fan is controlled to operate at a rotating speed P1, and the electric switching valve 45 is controlled to switch to the first capillary tube 46, so that the capillary tube flow is V1. During the temperature adjustment process, the temperature sensor 53 detects the real-time temperature inside the instant freezing chamber 2, and when the temperature of the instant freezing chamber 2 is detected to reach the normal storage start-up temperature point T _ON When the air door of the instant freezing chamber 2 is controlled to be opened, cold air generated by the refrigerating system 4 enters the instant freezing chamber 2, and the temperature of the cold air is reduced; when the temperature of the instant freezing chamber 2 is detected to reach the normal preservation shutdown temperature point T _OFF And when the air door of the instant freezing chamber 2 is controlled to be closed, the cold air is prevented from entering the instant freezing chamber 2.

Preferably, the temperature range of the conventional refrigeration preservation temperature T of the cooling object is more than or equal to minus 7 ℃ and less than 0 ℃, and the temperature range is used for enabling the meat cooling object to be cut after being taken out.

Preferably, the normal refrigeration starting temperature point T _ON ＝T+T _B1 2, conventional refrigeration stop temperature point T _OFF ＝T _ON –T _B2 /2。

Preferably, M1 is less than M2, M1 ranges from 1200rpm to 1400rpm, and M2 ranges from 3800rpm to 4500rpm; v2 is less than V1, V1 is in the range of 4.5L/min-5L/min, V2 is in the range of 2L/min-3L/min, P1 is in the range of 1200 rpm-1500 rpm, and P2 is in the range of 1600 rpm-1900 rpm.

Preferably, the capillary flow rate change may be achieved by switching between capillaries of different inner diameters, or by increasing or decreasing capillaries of the same inner diameter in the refrigeration system flow path, and in this embodiment, it is preferred to switch between capillaries of different inner diameters using an electrically operated switching valve 45.

The rotational speed of the compressor 41, the rotational speed of the condenser fan, the capillary flow rate, and the on-off change of the oscillating device 6 in each step of this embodiment are shown in table 1.

TABLE 1

Step (a)	Condenser fan speed	Capillary flow rate	Compressor	41 speed	Oscillation device 6
						S11	P1	V1	M2	Closing
S12	P1	V1	M1	Closing
					S13	P1	V1	M1	Closing
S14	P1	V1	M1	Closing
					S15	P1	V1	M1	Closing
S2	P2	V2	M1	Opening the valve
					S3	P1	V1	M1	Closing

In this embodiment, as shown in fig. 7, the temperature of the cooling object is reduced from higher than 0 ℃ to lower than 0 ℃ during supercooling and cooling; in the supercooling releasing process, the supercooling state of the cooling object is released, the temperature is raised but still lower than 0 ℃, and the final temperature reached by the rise after the temperature rise is completed is maintained; in the conventional refrigerating and preserving process, the temperature of the object to be cooled is continuously lowered based on the temperature finally reached by the supercooling release.

The control method provided by the embodiment not only can realize the instant freezing storage of the meat cooling object, but also can realize the instant freezing storage of the cooling object with other freezing points by changing the number of supercooling cooling steps and the maintaining duration of each step.

According to the embodiment, the cooling object can be stably brought into the supercooling state by performing the stage cooling control on the instant freezing chamber 2 during supercooling and cooling, the supercooling state is prevented from being released in advance, the supercooling is released by adopting a mode of combining the changing of the capillary flow, the increasing of the rotating speed of the condenser fan and the physical oscillation applied to the cooling object, the instant freezing of the cooling object is realized, the problem that the supercooling release effect is poor due to the fact that the air quantity or the air speed is simply increased is avoided, and the cooling object is well cut after being taken out due to the setting of the conventional refrigeration storage stage.

In summary, the invention realizes the instantaneous freezing storage of the cooling object through the three processes of supercooling, cooling, supercooling and removing and conventional refrigeration storage, so that the temperature of the cooling object is uniformly and uniformly reduced, the cooling object stably enters a supercooling state with proper depth, the capillary flow is reduced, the rotating speed of a condenser fan is increased, and physical oscillation is applied to the cooling object so as to give a large amount of cool air to the cooling object and realize supercooling release through physical oscillation stimulation.

Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that this disclosure is not limited to the particular arrangements, instrumentalities and methods of implementation 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

1. A transient freezing storage method is characterized in that: the instant freezing storage process is provided with a supercooling and cooling process, a supercooling and releasing process and a conventional refrigerating and preserving process, wherein: s1: cooling the cooling object in stages to enable the cooling object to enter a supercooling state; s2: in the supercooling releasing process, the supercooling state of the cooling object is released by adopting a mode of combining the three modes of reducing capillary flow, increasing the rotating speed of a condenser fan, increasing the rotating speed of a compressor and applying physical oscillation to the cooling object; s3: a conventional refrigeration preservation process, in which the object to be cooled after supercooling is released is subjected to conventional refrigeration preservation;

the supercooling release process S2: starting an oscillation device, reducing capillary flow, increasing the rotating speed of a condenser fan and increasing the rotating speed of a compressor at the same time, so that the supercooling state of a cooling object is relieved, the starting time of the oscillation device is preset to be t ', the duration of a preset step S2 is t, a timing unit is adopted to respectively time t ' and t, when the accumulated time of the timing unit reaches t ', the oscillation device is closed, and when the accumulated time of the timing unit reaches t, the execution of the step S2 is stopped, wherein the relation between t and t ' is t & gtt ';

the step S1 comprises the steps S11 to S1n, wherein the steps S12 to S1n are carried out, the rotating speed of the compressor is set to be M1, the rotating speed of the condenser fan is set to be P1, and the capillary flow is set to be V1; in the step S11, the rotation speed of the compressor is set to M2, the rotation speed of the condenser fan is set to P1, and the capillary flow is set to V1;

in the step S2, the rotating speed of the condenser fan is set to be P2, the capillary flow is set to be V2, and the rotating speed of the compressor is set to be M1;

wherein P2 is greater than P1, V2 is less than V1, and M2 is greater than M1;

the oscillation frequency range of the physical oscillation applied to the cooling object is 50 times/min-60 times/min.

2. A control method of a refrigerator having a compartment with a transient freeze storage function, characterized in that during transient freeze storage, the compartment is subjected to transient freeze control as follows: s1: cooling the cooling object in stages to enable the cooling object to enter a supercooling state; s2: the supercooling removing process is carried out, and the supercooling state of the cooling object is removed by adopting a mode of combining the three modes of reducing capillary flow, increasing the rotating speed of a condenser fan and increasing the rotating speed of a compressor and applying physical oscillation to the cooling object; s3: performing conventional refrigeration preservation process, and performing conventional refrigeration preservation on the cooled object after supercooling release;

in the step S2, the rotating speed of the condenser fan is set to be P2, the capillary flow is set to be V2, and the rotating speed of the compressor is set to be M1, wherein M2 is more than M1;

3. The method of claim 1 or 2, wherein each stage of the supercooling staged cooling process employs intermittent air supply, and when the supercooling staged cooling process is in the nth stage: when the storage temperature of the instant freezing compartment reaches TONn=Tn+Tb1/2, the air door of the instant freezing compartment is opened; when the storage temperature of the instant freezing compartment reaches toffn=ton-TB 2/2, the instant freezing compartment damper is closed, wherein Tn refers to the preset temperature of the nth stage; TB1 refers to the floating temperature of the starting point of the instant freezing chamber in the starting process of the compressor, TB2 refers to the starting-stopping temperature difference of the instant freezing chamber, TONn > Tn > Toffn.

4. A method as claimed in claim 3, wherein: s1 comprises the following steps: s11: adjusting the temperature of the instant freezing compartment by taking T1 as a target, presetting the duration of a cooling step S11 as a first cooling time T1, adopting a timing unit to count time, opening a damper of the instant freezing compartment when the temperature of the instant freezing compartment reaches a first starting temperature point TON1 in the time T1, closing the damper of the instant freezing compartment when the temperature of the instant freezing compartment reaches a first stopping temperature point TOFF1, wherein TON1=T1+T1/2, TOFF1=TON1-T2/2, and stopping executing the step S11 when the accumulated duration of the timing unit reaches T1; s12: presetting a second cooling target of a cooling object as T2, enabling the temperature of the instant freezing compartment to be adjusted and cooled by taking T2 as the target, presetting the duration of a cooling step S12 as second cooling time T2, timing by adopting a timing unit, opening an air door of the instant freezing compartment when the temperature of the instant freezing compartment reaches a second starting temperature point TON2 in the time T2, closing the air door of the instant freezing compartment when the temperature of the instant freezing compartment reaches a second stopping temperature point TOFF2, wherein TON2=T2+Tb1/2, TOFF2=TON2-TB 2/2, and stopping executing the step S12 when the accumulated duration of the timing unit reaches T2; sequentially cooling step by step until S1 n; s1n: presetting an nth cooling target of a cooling object as Tn, enabling the temperature of the instant freezing compartment to be adjusted and cooled by taking Tn as the target, presetting the duration of a cooling step S1n as nth cooling time Tn, timing by adopting a timing unit, opening a damper of the instant freezing compartment when the temperature of the instant freezing compartment reaches an nth starting temperature point TONn in Tn time, closing the damper of the instant freezing compartment when the temperature of the instant freezing compartment reaches an nth stopping temperature point TOFFn, wherein TONn=Tn+Tb1/2, TOFFn=TONn-TB 2/2, n is more than or equal to 1, n is a natural number, and stopping executing the step S1n when the accumulated duration of the timing unit reaches Tn.

5. The method according to claim 4, wherein in the step S11, T1 ranges from 0 ℃ to 5 ℃ and T1 ranges from 2h to 4h.

6. The method as set forth in claim 5, wherein the final cooling target range of the supercooling cooling process is-5 ℃ to-20 ℃, and the cooling temperature difference between each of the steps S12 to S1n is 0 ℃ to 2 ℃ but not 0 ℃.

7. The method of claim 1 or 2, wherein t and t 'range from 10h ≡t > t' > 0h.

8. The method according to claim 1 or 2, wherein the conventional refrigeration preservation process S3: the conventional refrigeration preservation temperature of the cooling object is preset to be T, when the temperature of the instant freezing compartment reaches the conventional refrigeration preservation starting temperature point TON, a throttle of the instant freezing compartment is opened, and when the temperature of the instant freezing compartment reaches the conventional refrigeration preservation stopping temperature point TOFF, the throttle of the instant freezing compartment is closed, wherein TON=T+Tb1/2, and TOFF=TON-TB 2/2.

9. The method of claim 1 or 2, wherein V1 ranges from 4.5L/min to 5L/min, V2 ranges from 2L/min to 3L/min, P1 ranges from 1200rpm to 1500rpm, and P2 ranges from 1600rpm to 1900rpm.

10. A control system, characterized by: the control system employs the method of any one of claims 1 to 9.

11. The control system of claim 10, comprising: controller, temperature regulating device, temperature sensor, timing unit, its characterized in that: the controller receives information from the temperature sensor and the timing unit and controls the temperature regulating device to regulate the temperature of the instant freezer; the temperature adjusting device is used for adjusting the instant freezing compartment to operate according to a preset temperature; the temperature sensor is used for detecting the temperature of the instant freezing compartment in real time; and the timing unit is used for setting and monitoring the duration.

12. A refrigerator provided with a flash compartment, characterized in that: the refrigerator having a control system according to any one of claims 10,11 or employing the method according to any one of claims 1-9.