CN110906683A - Instant freezing storage control method and refrigerator - Google Patents

Instant freezing storage control method and refrigerator Download PDF

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Publication number
CN110906683A
CN110906683A CN201911045322.7A CN201911045322A CN110906683A CN 110906683 A CN110906683 A CN 110906683A CN 201911045322 A CN201911045322 A CN 201911045322A CN 110906683 A CN110906683 A CN 110906683A
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CN
China
Prior art keywords
temperature
instant freezing
freezing chamber
cooling
supercooling
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Withdrawn
Application number
CN201911045322.7A
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Chinese (zh)
Inventor
王飞
钱梅双
辛海亚
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Gree Electric Appliances Inc of Zhuhai
Hefei Jing Hong Electrical Co Ltd
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Hefei Jing Hong Electrical Co Ltd
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Application filed by Gree Electric Appliances Inc of Zhuhai, Hefei Jing Hong Electrical Co Ltd filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201911045322.7A priority Critical patent/CN110906683A/en
Publication of CN110906683A publication Critical patent/CN110906683A/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/30—Quick freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/36—Visual displays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2600/00—Control issues
    • F25D2600/02—Timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2600/00—Control issues
    • F25D2600/06—Controlling according to a predetermined profile

Abstract

The invention relates to a transient freezing storage control method and a refrigerator, which realize transient freezing storage of a cooled object by performing three processes of supercooling cooling, supercooling release and conventional refrigeration storage on the cooled object. The cooling process is controlled in a staged mode through the instant freezing chamber, after a cooling object stably enters a supercooling state, supercooling is removed in a mode of combining capillary flow reduction and condenser fan rotating speed increase, the cooling object quickly passes through the largest ice crystal belt, instant freezing of the cooling object is achieved, the cooling object is cut well after being taken out in a conventional refrigeration storage process, nutrition loss caused by the fact that juice of the cooling object flows out in a large amount is avoided, and the storage requirement of a user can be met.

Description

Instant freezing storage control method 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 the refrigerator.
Background
In order to better maintain the nutrition of frozen food, the food is preserved by adopting a freezing mode such as ordinary freezing, quick freezing and the like and a supercooling mode, but the traditional ordinary 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 maximum ice crystal generation zone, the production cost is high, and the rapid freezing is not beneficial to popularization and application in a refrigerator; in the prior art of supercooling, supercooling is removed in advance due to uneven temperature reduction in the supercooling and cooling process, the supercooling cannot stably enter a supercooled state, so that the supercooling depth is shallow, and the supercooling removing effect is poor due to increase of wind speed or wind quantity.
Disclosure of Invention
According to the invention, through carrying out stage-type cooling control on the cooled object in the stage of supercooling cooling, supercooling is removed by adopting a mode of combining changing the flow of the capillary tube and increasing the rotating speed of the fan of the condenser, the cooled object is kept in a good cutting state in the conventional refrigeration process, complex operation is not needed, the temperature of the cooled object can be uniformly reduced in the instant freezing process, the nutrition is well preserved, and the quality is not reduced.
Specifically, the method comprises the following steps:
the invention provides a transient freezing storage method, which is provided with a supercooling cooling process, a supercooling relieving process and a conventional refrigeration storage process in the transient freezing storage process, wherein the supercooling cooling process comprises the following steps:
s1: a supercooling cooling process, in which the temperature of the cooling object is reduced by stages to enable the cooling object to enter a supercooling state;
s2: the supercooling relieving process is carried out, wherein the supercooling state of the cooling object is relieved by adopting a mode of combining the reduction of the flow rate of the capillary tube and the increase of the rotating speed of a fan of the condenser;
s3: and in the conventional refrigeration preservation process, the object to be cooled after supercooling release is subjected to conventional refrigeration preservation.
The invention also provides a refrigerator control method, the refrigerator has a compartment with instant freezing storage function, during the instant freezing storage period, the following instant freezing control is carried out on the compartment:
s1: performing a supercooling and cooling process, and cooling the cooling object by stages to enable the cooling object to enter a supercooling state;
s2: the supercooling relieving process is carried out, and the supercooling state of the cooling object is relieved by adopting a mode of combining the reduction of the flow rate of the capillary tube and the increase of the rotating speed of the fan of the condenser;
s3: and performing a conventional refrigeration storage process, and performing conventional refrigeration storage on the cooled object after supercooling release.
Preferably, intermittent air supply is adopted in each stage of the supercooling staged cooling process, and when the supercooling staged cooling process is in the nth stage: the storage temperature of the instant freezing chamber reaches TONn＝Tn+TB1At the time of/2, the air door of the instant freezing chamber is opened; the storage temperature of the instant freezing chamber reaches Toffn＝TONn-TB2At/2, the instant freezing chamber air door is closed, wherein Tn refers to the preset temperature of the nth stage; t isB1Indicates the starting point floating temperature T of the instant freezing chamber in the starting process of the compressorB2Temperature difference between start and stop of instant freezing chamber, TONn>Tn>Toffn。
Preferably, the supercooling cooling process S1 includes:
s11: the temperature of the instant freezing chamber is adjusted by taking T1 as a target, the duration of the preset temperature reduction step S11 is a first temperature reduction time T1, a timer is adopted for timing, and in the time T1, when the temperature of the instant freezing chamber reaches a first starting temperature point TON1When the temperature of the instant freezing chamber reaches the first stop temperature point T, the air door of the instant freezing chamber is openedOFF1At the same time, the air door of the instant freezing chamber is closed, wherein TON1＝T1+TB1/2,TOFF1＝TON1–T B22, when the timer accumulated time length reaches t1, stopping executing the step S11;
s12: the second preset cooling target of the cooling object is T2, the instant freezing chamber temperature is adjusted to be cooled by taking T2 as a target, the duration of the step S12 of the preset cooling is the second cooling time T2, a timer is adopted for timing, and in the time T2, when the temperature of the instant freezing chamber reaches the second starting temperature point TON2When the temperature of the instant freezing chamber reaches the second stop temperature point T, the air door of the instant freezing chamber is openedOFF2At the same time, the air door of the instant freezing chamber is closed, wherein TON2＝T2+TB1/2,TOFF2＝TON2–T B22, when the timer accumulated time length reaches t2, stopping executing the step S12;
thereby cooling down the temperature step by step until the step S1 n;
s1 n: presetting an nth cooling target of a cooling object as Tn, enabling the temperature of the instant freezing chamber to be adjusted and cooled by taking the Tn as the target, presetting the duration of the cooling step S1n as the nth cooling time Tn, timing by adopting a timer, and when the temperature of the instant freezing chamber reaches the nth starting temperature point T within the Tn time, counting by adopting the timerONnWhen the instant freezing chamber temperature reaches the nth shutdown temperature point T, the air door of the instant freezing chamber is openedOFFnAt the same time, the air door of the instant freezing chamber is closed, wherein TONn＝Tn+TB1/2,TOFFn＝TONn–TB2And/2, stopping executing the step S1n when the accumulated time length of the timer reaches tn, wherein n is more than or equal to 1 and is a natural number.
Preferably, the first temperature reduction target of the cooling object is preset to T1 according to the type, volume, weight and external environment temperature of the cooling object.
Preferably, the T1 is between 0 ℃ and T1 and 5 ℃, and the T1 is between 2h and 4 h.
Preferably, the final temperature reduction target range of the supercooling temperature reduction process is-5 ℃ to-20 ℃, and the temperature reduction temperature difference range between the steps S12 to S1n is 0 ℃ to 2 ℃ but does not include 0 ℃.
Preferably, the supercooling release process S2: and (3) reducing the flow of the capillary tube, increasing the rotating speed of a fan of the condenser to relieve the overcooling state of the cooling object, presetting the duration of the step S2 as t, timing by adopting a timer, and stopping executing S2 when the accumulated time of the timer reaches t, wherein the range of t is 0-10 h.
Preferably, in S11, the compressor rotation speed is M2, the condenser fan rotation speed is P1, and the capillary flow rate is V1; in S12-S1 n, the rotating speed of the compressor is M1, the rotating speed of the fan of the condenser is P1, and the flow rate of the capillary tube is V1; in S2, the rotating speed of the compressor is set to be M1, the rotating speed of the fan of the condenser is set to be P2, and the flow rate of the capillary tube is set to be V2; wherein M2> M1, P2> P1, V2 < V1.
Preferably, P2 is the condenser fan speed maximum.
Preferably, conventional refrigeration preservation processS3: the normal refrigeration preservation temperature of a preset cooling object is T, and when the temperature of the instant freezing room reaches the starting temperature point T of the normal refrigeration preservationONWhen the temperature of the instant freezing chamber reaches the normal refrigeration preservation shutdown temperature point TOFFAt the same time, the air door of the instant freezing chamber is closed, wherein TON＝T+TB1/2,TOFF＝TON–TB2/2。
Preferably, in the conventional cryopreservation process S3, the compressor speed is set to M1, the condenser fan speed is set to P1, and the capillary flow rate is set to V1.
Preferably, the range of M1 is 1200 rpm-1400 rpm, the range of M2 is 3800 rpm-4500 rpm, the range of V1 is 4.5L/min-5L/min, the range of V2 is 2L/min-3L/min, the range of P1 is 1200 rpm-1500 rpm, and the range of P2 is 1600 rpm-1900 rpm.
The invention also provides a control system, and the control method provided by the invention is adopted.
Preferably, the control system comprises: controller, temperature regulation apparatus, temperature sensor, time-recorder, its characterized in that: a controller for receiving information from the temperature sensor and the timer and controlling the temperature adjusting device to adjust the temperature of the instant freezing room; the temperature adjusting device is used for adjusting the instantaneous freezing chamber to operate according to a preset temperature; the temperature sensor is used for detecting the temperature of the instant freezing chamber in real time; and the timer is used for setting and monitoring the time length.
In addition, the invention also provides a refrigerator which is provided with the instant freezing chamber and adopts the control system or the control method provided by the invention.
Preferably, the refrigerator further includes a refrigerating system for generating cool air to be supplied to the instant freezing chamber.
The invention can lead the temperature of the cooling object to drop uniformly and uniformly, stably enter the supercooling state with proper depth, has good supercooling relieving effect, avoids nutrition loss caused by the outflow of a large amount of juice of the cooling object, and can meet the storage requirement of a user.
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 some embodiments of the present disclosure, and other drawings may be derived from those drawings by those of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic diagram of the control logic of embodiment 2 of the present invention;
fig. 2 is a schematic structural view 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 structural diagram of a refrigerator according to embodiment 1 of the present invention;
FIG. 5 is a control diagram in embodiments 1 and 2 of the present invention;
fig. 6 is a schematic diagram of changes in the temperature of a cooling target in embodiment 2 of the present invention.
In the drawings:
1-a refrigerating chamber; 2-instant freezing chamber; 3-freezing chamber;
4-a refrigeration system; 41-a compressor; 42-a condenser; 43-anti-condensation tube; 44-a dry filter; 45-an electric switching valve; 46-a first capillary; 47 a second capillary; 48-freezer evaporator; 49-a return air duct assembly; 410-return gas heat exchange section;
5-a control system; 51-a controller; 52-a display; 53-temperature sensor; 54-a temperature regulating device; 55-a frequency conversion plate; 56-timer.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different 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 example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, 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 subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the disclosure.
The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to 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 actual execution sequence may be changed according to the actual situation.
It is to be understood that, as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It is to be understood by those skilled in the art that the drawings are merely schematic representations of exemplary embodiments, and that the blocks or processes shown in the drawings are not necessarily required to practice the present disclosure and are, therefore, not intended to limit the scope of the present disclosure.
The invention aims to provide a flash freezing storage method and a refrigerator, which can perform flash freezing storage on a cooling object, quickly release the overcooling state to instantly freeze the cooling object after the cooling object stably enters the overcooling state, realize flash freezing storage of the cooling object, and solve the problems of uneven temperature reduction, shallow overcooling depth, poor storage effect of the cooling object after the overcooling release, juice outflow, little nutrition preservation and flavor and quality reduction during storage of the cooling object.
For further explanation, the present invention takes an air-cooled refrigerator as an example, and provides the following specific examples. The air-cooled refrigerator uses cold air as a carrier, and the rotating speed of a freezing 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:
and an instant freezing chamber 2 for receiving the cooling object and performing instant freezing storage on the cooling object.
And the refrigerating system 4 is used for controllably providing cold air to the instant freezing chamber 2 so as to reduce or maintain the temperature of the instant freezing chamber 2 according to preset temperatures. The method specifically comprises the following steps: the device comprises a compressor 41, a condenser 42, a condensation preventing pipe 43, a drying filter 44, an electric switching valve 45, a first capillary tube 46, a second capillary tube 47, a freezing chamber evaporator 48, a gas return pipe assembly 49 and a gas return heat exchange section 410.
And the control system 5 is used for controlling the refrigerating system 4 to provide cold air to the instant freezing chamber 2, controlling the temperature adjusting device 54 to adjust the temperature of the instant freezing chamber 2, reducing or maintaining the temperature of the instant freezing chamber 2 according to the preset target temperature of each step, and realizing instant freezing storage of a cooling object.
Preferably, the refrigerator further comprises a condenser fan for enhancing the heat exchange function of the condenser.
Preferably, the rotating speed of the condenser fan is controlled by the control system 5 according to the preset cooling target temperature in each step, and when the rotating speed of the condenser fan is high, the amount of cold air finally entering the instant freezing chamber 2 is larger than that entering the instant freezing chamber 2 when the rotating speed of the condenser fan is low.
Preferably, the control system 5 comprises: a controller 51, which is provided with a chip processor inside and is used for receiving information from a temperature sensor 53 and a timer 56 and controlling a temperature adjusting device 54 and the refrigerating system 4 to adjust the temperature of the instant freezing chamber 2; a temperature adjusting device 54 for adjusting the operation of the instant freezing chamber 2 according to a preset target temperature; a temperature sensor 53 for detecting the temperature of the instant freezing chamber 2 in real time; a timer 56 for setting and monitoring time; a frequency conversion plate 55 for adjusting the compressor 41; the display 52, the display 52 has instant freezing function selection button on the panel, the user can select whether the cooling object needs to implement instant freezing function.
Specifically, after the user puts the cooling target into the instant freezing chamber 2, the instant freezing function selection button is pressed on the refrigerator display 52 to perform instant freezing storage of the cooling target. In the instant freezing storage process, the control system 5 controls and adjusts the compressor 41 in the refrigeration system 4 to operate at different rotating speeds according to preset target temperatures in each step to generate cold air which is finally supplied to the instant freezing chamber 2, controls the electric switching valve 45 to switch to the capillary tubes with different inner diameters so as to change the flow rate of refrigerant in the flow path of the refrigeration system 4, and further changes the temperature of the cold air supplied by the refrigeration system 4, specifically, the flow rate V1 of the first capillary tube 46 is greater than the flow rate V2 of the second capillary tube 47, and the temperature of the cold air generated when the electric switching valve 45 is switched to the first capillary tube 46 is higher than the temperature of the cold air generated when the electric switching valve is switched to the second capillary tube 47.
Preferably, the control system 5 implements the change of the rotation speed of the compressor 41 through the frequency conversion plate 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 that when the rotation speed is low.
Preferably, the control system 5 accumulates and controls the duration of each step in the instant freezing storage process through the timer 56, specifically, the running duration of each step in the instant freezing storage process is preset, 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 the air door of the instant freezing chamber 2, so that the cold air generated by the refrigerating system 4 enters the instant freezing chamber 2 to reduce the temperature of the cold air; when the temperature sensor 53 detects that the temperature of the instant freezing chamber 2 reaches the shutdown temperature point set in this step, the control system 5 controls the air door of the instant freezing chamber 2 to close, and prevents cold air from entering the instant freezing chamber 2.
In 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 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 the nutrition and the flavor are kept well.
Example 2:
as shown in fig. 1, the present embodiment provides a flash storage control method, including:
s1: and performing an overcooling and cooling process, and performing staged cooling on the cooling object to enable the cooling object to enter an overcooling state.
Specifically, the method comprises the following steps:
s11: the preset step S11 is performed for a duration of T1, the preset cooling target is T1, and the instant freezing chamber 2 is adjusted to target T1, wherein the control system 5 controls the compressor 41 to operate at M2 through the frequency conversion plate 55, controls the condenser fan to operate at P1, and controls the electric switching valve 45 to switch to the first capillary 46, so that the capillary flow rate 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 is detected to reach the first starting temperature point TON1When the temperature of the air is reduced, the air door of the instant freezing chamber 2 is controlled to be opened, so that cold air generated by the refrigerating system 4 enters the instant freezing chamber 2; when the temperature of the instant freezing chamber 2 is detected to reach a first shutdown temperature point TOFF1At the same time, the air door of the instant freezing chamber 2 is controlled to be closed, and cold air is prevented from entering the instant freezing chamber 2. The timer 56 is used for timing in the implementation process of this step, and when the accumulated time length of the timer 56 reaches t1, the execution of step S11 is stopped.
Preferably, the first temperature reduction target of the cooling object is preset to T1 according to the type, volume, weight and external environment temperature of the cooling object.
Preferably, the first cooling target T1 may be set by the user or in the control program, and if the first cooling target T1 is set in the control program, the user may select the first cooling target T in the menu bar of the refrigerator.
Preferably, the first starting temperature point TON1＝T1+TB1First shutdown temperature point TOFF1＝TON1–TB2/2。
Preferably, TB1Indicating the floating temperature of the starting point of the instant freezing chamber 2 in the starting process of the compressor 41; t isB2Temperature difference, T, between start and stop of instant freezing chamber 2B1And TB2Is a known parameter, wherein TB1In the range of 0 ℃ to < TB1,TB2Range of TB2≤2℃。
Preferably, the first temperature reduction target T1 is in the range of 0 ℃ to T1 to 5 ℃, and the duration T1 of the step S11 is in the range of 2h to T1 to 4 h.
Preferably, when the temperature of the object to be cooled 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 be increased to a temperature of 0 ℃ or more, which contributes to uniform temperature reduction of the entire instant freezing chamber 2 in the subsequent steps and also makes uniform and uniform temperature reduction of the inside and outside of the object to be cooled.
S12: the preset step S12 is performed for a duration of T2, the preset cooling target is T2, and the instant freezing chamber 2 is adjusted to target T2, wherein the control system 5 controls the compressor 41 to operate at M1 through the inverter board 55, controls the condenser fan to operate at P1, and controls the electric switch valve 45 to maintain the first capillary 46, so that the capillary flow rate is V1. In the temperature adjusting 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 second starting temperature point TON2When the temperature of the air is reduced, the air door of the instant freezing chamber 2 is controlled to be opened, so that cold air generated by the refrigerating system 4 enters the instant freezing chamber 2; when the temperature of the instant freezing chamber 2 is detected to reach the second shutdown temperature point TOFF2At the same time, the instant freezing chamber 2 is controlled to prevent cold air from entering the instant freezing chamber 2. The timer 56 is used for timing in the implementation process of this step, and when the accumulated time length of the timer 56 reaches t2, the execution of step S12 is stopped.
Preferably, the second starting temperature point TON2＝T2+TB1Second shutdown temperature Point TOFF2＝TON2–TB2/2。
Preferably, the second target temperature reduction T2 is in the range of-2 ℃ to T2 to 0 ℃, and the duration T2 of the step S12 is in the range of 2h to T2 to 4 h.
S13: the preset step S13 is performed for a duration of T3, the preset cooling target is T3, and the instant freezing chamber 2 is adjusted to target T3, wherein the control system 5 controls the compressor 41 to operate at M1 through the inverter board 55, controls the condenser fan to operate at P1, and controls the electric switch valve 45 to maintain the first capillary 46, so that the capillary flow rate is V1. In the temperature adjusting process, the temperature sensor 53 detects the real-time temperature inside the instant freezing chamber 2, and when it is detected that the temperature of the instant freezing chamber 2 reaches the third opening machine temperature point TON3In time, the instant freezing chamber 2 is controlledThe air door is opened, so that cold air generated by the refrigerating system 4 enters the instant freezing chamber 2, and the temperature of the instant freezing chamber is reduced; when the temperature of the instant freezing chamber 2 is detected to reach a third shutdown temperature point TOFF3At the same time, the air door of the instant freezing chamber 2 is controlled to be closed, and cold air is prevented from entering the instant freezing chamber 2. The timer 56 is used for timing in the implementation process of this step, and when the accumulated time length of the timer 56 reaches t3, the execution of step S13 is stopped.
Preferably, the third opening machine temperature point TON3＝T3+TB1Third shutdown temperature Point TOFF3＝TON3–TB2/2。
Preferably, the third temperature reduction target T3 is in the range of-3 ℃ to T3 < -2 ℃, and the duration T3 of the step S13 is in the range of 2h to T3 to 4 h.
Thereby cooling down the temperature step by step until the step S1 n;
s1 n: the preset step S1n is performed for a preset duration Tn, the preset cooling target is Tn, and the instant freezing chamber 2 is adjusted to target Tn, wherein the control system 5 controls the compressor 41 to operate at the rotation speed M1 through the frequency conversion plate 55, controls the condenser fan to operate at the rotation speed P1, and controls the electric switching valve 45 to maintain the switching to the first capillary 46, so as to control the capillary flow rate to be V1. In the temperature adjusting 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 nth starting temperature point TONnWhen the temperature of the air is reduced, the air door of the instant freezing chamber 2 is controlled to be opened, so that cold air generated by the refrigerating system 4 enters the instant freezing chamber 2; when the temperature of the instant freezing chamber 2 is detected to reach the nth shutdown temperature point TOFFnAt the same time, the air door of the instant freezing chamber 2 is controlled to be closed, and cold air is prevented from entering the instant freezing chamber 2. The timer 56 is used for timing in the implementation process of this step, and when the accumulated time length of the timer 56 reaches tn, the step S1n is stopped.
Preferably, the nth starting temperature point TONn＝Tn+TB1N < 2>, n < th > shutdown temperature point TOFFn＝TONn–TB2/2。
Preferably, the nth cooling target Tn is in the range of-n ℃ ≦ Tn ≦ n-1 deg.C, and the duration Tn of step S1n is in the range of 2h ≦ Tn ≦ 4 h.
Preferably, the final temperature reduction target range of the supercooling temperature reduction process is-5 ℃ to-20 ℃, the temperature difference range of the temperature reduction between the front and the back adjacent steps in the steps S12 to S1n is 0 ℃ to 2 ℃ but not 0 ℃, and the duration time of each step is 2h to 4 h.
Preferably, n is equal to or greater than 1, n is a natural number, and the specific value of n is set according to the freezing point of the cooling object placed in the instant freezing chamber 2, so that the cooling object stably enters the supercooling state after the completion of the step S1n, and the supercooling depth is appropriate. In the present embodiment, since the object to be cooled in the instant freezing chamber 2 is meat, n is set to 5, which allows the meat placed in the instant freezing chamber 2 to be stably supercooled.
Steps S12 to S1n can make the temperature of the object to be cooled drop uniformly, the supercooling depth appropriate, and stably enter the supercooling state, thereby avoiding premature supercooling release.
S2: and performing an overcooling removing process, wherein the overcooling state of the cooling object is removed by adopting a mode of combining reducing the flow of the capillary tube and increasing the rotating speed of the fan of the condenser.
Specifically, the method comprises the following steps:
s2: presetting the duration of step S2 as t, 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 P2, controls the electric switching valve 45 to be switched to the second capillary tube 47, changes the capillary flow in the flow path of the refrigeration system 4 from V1 to V2, uses the timer 56 to time in the process, and stops executing step S2 when the accumulated time length of the timer 56 reaches t.
Preferably, the preset duration t of step S2 is in the range of 0 < t.ltoreq.10 h.
Preferably, P1 < P2, and the condenser fan speed P2 is the condenser fan maximum speed.
In step S2, the flow rate of the capillary tube decreases, the temperature of the cold air generated by the refrigeration system 4 decreases, the rotational speed of the condenser fan increases, the cold air entering the instant freezing chamber 2 increases, the maximum cold air stimulus is given to the cooled object at low temperature, the cooled object rapidly passes through the maximum ice crystal growth zone, the moisture in the cooled object instantly forms granular ice crystals with uniform size, the cells of the cooled object are prevented from being damaged while the cooled object is instantly frozen, the effect of removing supercooling by changing the flow rate of the capillary tube and increasing the rotational speed of the condenser fan is better than the effect of removing supercooling by increasing the air volume and the air speed, and the cooled object is prevented from being air-dried.
S3: and performing a conventional refrigeration storage process, and performing conventional refrigeration storage on the cooled object after supercooling release.
Specifically, the method comprises the following steps:
s3: the normal refrigeration preservation temperature of the cooling object is preset to be T, the instant freezing chamber 2 is adjusted by taking the T as a target, wherein the control system 5 controls the compressor 41 to operate at a rotating speed M1 through the frequency conversion plate 55, controls the condenser fan to operate at a rotating speed P1, controls the electric switching valve 45 to be switched to the first capillary 46, and enables the capillary flow to be V1. In the temperature adjusting 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 starting temperature point T of the conventional refrigeration and preservationONWhen the temperature of the air is reduced, the air door of the instant freezing chamber 2 is controlled to be opened, so that cold air generated by the refrigerating system 4 enters the instant freezing chamber 2; when the temperature of the instant freezing chamber 2 is detected to reach the shutdown temperature point T of the conventional refrigeration preservationOFFAt the same time, the air door of the instant freezing chamber 2 is controlled to be closed, and cold air is prevented from entering the instant freezing chamber 2.
Preferably, the conventional refrigeration preservation temperature T range of the cooling object is more than or equal to minus 7 ℃ and less than 0 ℃, and the temperature range ensures that the meat cooling object is taken out and cut well.
Preferably, the normal refrigeration startup temperature point TON＝T+TB1/2, normal refrigeration shutdown temperature point TOFF＝TON–TB2/2。
Preferably, M1 is less than M2, M1 ranges from 1200rpm to 1400rpm, and M2 ranges from 3800rpm to 4500 rpm; v2 is less than V1, 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 1900 rpm.
Preferably, the capillary flow rate can be changed by switching capillaries with different inner diameters, or by increasing or decreasing capillaries with the same inner diameter in the flow path of the refrigeration system, and in this embodiment, the capillary flow rate can be changed by switching the capillaries with different inner diameters by using the electric switching valve 45.
The compressor 41 rotation speed, the condenser fan rotation speed, and the capillary flow rate variation in each step of this example are shown in table 1.
TABLE 1
Figure BDA0002253972440000131
Figure BDA0002253972440000141
In the embodiment, the temperature change of the cooling object is shown in fig. 6, and in the supercooling and cooling process, the temperature of the cooling object is reduced from higher than 0 ℃ to lower than 0 ℃; in the supercooling relieving process, the supercooling state of the cooling object is relieved, the temperature is raised but still lower than 0 ℃, and the final temperature reached by the temperature rise is maintained after the temperature rise is finished; in the conventional refrigeration preservation process, the temperature of the cooling target continues to decrease on the basis of the temperature that is finally reached by the supercooling release.
The control method provided by the embodiment can realize instant freezing storage of the meat cooling object, and can also realize instant freezing storage of the cooling object with other freezing points by changing the number of the supercooling and cooling steps and the maintaining time of each step.
In the embodiment, the stage-type cooling control is performed on the instant freezing chamber 2 during supercooling cooling, so that the cooled object can stably enter a supercooled state, the supercooled state is prevented from being removed in advance, the supercooling is removed in a mode of combining changing the flow of a capillary tube and increasing the rotating speed of a fan of a condenser, the instant freezing of the cooled object is realized, the problem that the supercooling removing effect is poor due to simple increase of the air volume or the air speed is avoided, and the cooled object is cut after being taken out due to the arrangement of a conventional refrigeration storage stage.
In conclusion, the instant freezing storage of the cooling object is realized through three processes of supercooling cooling, supercooling release and conventional refrigeration storage, so that the temperature of the cooling object is uniformly reduced and enters a supercooling state with proper depth stably, the flow of the capillary tube and the rotating speed of the fan of the condenser are changed so as to provide low-temperature stimulation to the cooling object to realize the supercooling release, and the conventional refrigeration storage enables the cooling object to be kept in a good cutting state, thereby avoiding nutrition loss caused by the outflow of a large amount of juice of the cooling object and meeting the storage requirements of users.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (15)

1. An instant freezing storage method is characterized in that: the instant freezing storage process is provided with a supercooling cooling process, a supercooling relieving process and a conventional refrigeration storage process, wherein:
s1: a supercooling cooling process, in which the temperature of the cooling object is reduced by stages to enable the cooling object to enter a supercooling state;
s2: the supercooling relieving process is carried out, wherein the supercooling state of the cooling object is relieved by adopting a mode of combining the reduction of the flow rate of the capillary tube and the increase of the rotating speed of a fan of the condenser;
s3: and in the conventional refrigeration preservation process, the object to be cooled after supercooling release is subjected to conventional refrigeration preservation.
2. A control method of a refrigerator having a compartment with a flash freezing storage function, characterized in that during the flash freezing storage, the following flash freezing control is performed for the compartment:
s1: performing a supercooling and cooling process, and cooling the cooling object by stages to enable the cooling object to enter a supercooling state;
s2: the supercooling relieving process is carried out, and the supercooling state of the cooling object is relieved by adopting a mode of combining the reduction of the flow rate of the capillary tube and the increase of the rotating speed of the fan of the condenser;
s3: and performing a conventional refrigeration storage process, and performing conventional refrigeration storage on the cooled object after supercooling release.
3. The method as claimed in claim 1 or 2, wherein the supercooling phase cooling process adopts intermittent air supply in each phase, and when supercooling is dividedWhen the stage cooling process is in the nth stage: the storage temperature of the instant freezing chamber reaches TONn＝Tn+TB1At the time of/2, the air door of the instant freezing chamber is opened; the storage temperature of the instant freezing chamber reaches Toffn＝TONn-TB2At/2, the instant freezing chamber air door is closed, wherein Tn refers to the preset temperature of the nth stage; t isB1Indicates the starting point floating temperature T of the instant freezing chamber in the starting process of the compressorB2Temperature difference between start and stop of instant freezing chamber, TONn>Tn>Toffn。
4. The method of claim 3, wherein: s1 includes:
s11: the temperature of the instant freezing chamber is adjusted by taking T1 as a target, the duration of the preset temperature reduction step S11 is a first temperature reduction time T1, a timer is adopted for timing, and in the time T1, when the temperature of the instant freezing chamber reaches a first starting temperature point TON1When the temperature of the instant freezing chamber reaches the first stop temperature point T, the air door of the instant freezing chamber is openedOFF1At the same time, the air door of the instant freezing chamber is closed, wherein TON1＝T1+TB1/2,TOFF1＝TON1–TB22, when the timer accumulated time length reaches t1, stopping executing the step S11;
s12: the second preset cooling target of the cooling object is T2, the instant freezing chamber temperature is adjusted to be cooled by taking T2 as a target, the duration of the step S12 of the preset cooling is the second cooling time T2, a timer is adopted for timing, and in the time T2, when the temperature of the instant freezing chamber reaches the second starting temperature point TON2When the temperature of the instant freezing chamber reaches the second stop temperature point T, the air door of the instant freezing chamber is openedOFF2At the same time, the air door of the instant freezing chamber is closed, wherein TON2＝T2+TB1/2,TOFF2＝TON2–TB22, when the timer accumulated time length reaches t2, stopping executing the step S12;
thereby cooling down the temperature step by step until the step S1 n;
s1 n: presetting an nth cooling target of a cooling object as Tn, enabling the temperature of the instant freezing chamber to be adjusted and cooled by taking the Tn as a target, presetting the duration of the cooling step S1n as an nth cooling time Tn,a timer is adopted for timing, and in the tn period, when the instant freezing room temperature reaches the nth starting temperature point TONnWhen the instant freezing chamber temperature reaches the nth shutdown temperature point T, the air door of the instant freezing chamber is openedOFFnAt the same time, the air door of the instant freezing chamber is closed, wherein TONn＝Tn+TB1/2,TOFFn＝TONn–TB2And/2, stopping executing the step S1n when the accumulated time length of the timer reaches tn, wherein n is more than or equal to 1 and is a natural number.
5. The control method according to any one of claims 3 and 4, wherein in step S11, T1 is in the range of 0 ℃ to T1 to 5 ℃, and T1 is in the range of 2 to 4 hours.
6. The control method as set forth in claim 5, wherein the final temperature decrease target range of the supercooling temperature decrease process is-5 ℃ to-20 ℃, and the temperature difference of the temperature decrease between the steps S12 to S1n is 0 ℃ to 2 ℃ excluding 0 ℃.
7. The control method according to any one of claims 1 to 6, wherein the supercooling release process S2: and reducing the flow of the capillary tube and increasing the rotating speed of a fan of the condenser at the same time, so that the supercooling state of the cooling object is released, presetting the duration of the step S2 as t, timing by adopting a timer, and stopping executing S2 when the accumulated time of the timer reaches t, wherein the range of t is 0-10 h.
8. The control method according to claim 7, wherein in the step S11, the compressor speed is set to M2, the condenser fan speed is set to P1, and the capillary flow rate is set to V1; in the steps S12-S1 n, the rotating speed of the compressor is set to M1, the rotating speed of the fan of the condenser is set to P1, and the flow rate of the capillary tube is set to V1; in the step S2, the compressor rotation speed is set to M1, the condenser fan rotation speed is set to P2, and the capillary flow rate is set to V2; wherein M2> M1, P2> P1, V2 < V1.
9. The control method as set forth in claim 8, wherein said P2 is a condenser fan speed maximum.
10. The method according to any one of claims 1 to 9, wherein the conventional refrigeration preservation process S3: the normal refrigeration preservation temperature of a preset cooling object is T, and when the temperature of the instant freezing room reaches the starting temperature point T of the normal refrigeration preservationONWhen the temperature of the instant freezing chamber reaches the normal refrigeration preservation shutdown temperature point TOFFAt the same time, the air door of the instant freezing chamber is closed, wherein TON＝T+TB1/2,TOFF＝TON–TB2/2。
11. The method as set forth in claim 10, wherein in said normal refrigeration storing process S3, the compressor rotation speed is set to M1, the condenser fan rotation speed is set to P1, and the capillary flow rate is set to V1.
12. The control method according to any one of claims 2 to 11, wherein the M1 is in a range of 1200rpm to 1400rpm, the M2 is in a range of 3800rpm to 4500rpm, the V1 is in a range of 4.5L/min to 5L/min, the V2 is in a range of 2L/min to 3L/min, the P1 is in a range of 1200rpm to 1500rpm, and the P2 is in a range of 1600rpm to 1900 rpm.
13. A control system, characterized by: the control system adopts the control method of any one of claims 2-12.
14. The control system of claim 13, comprising: controller, temperature regulation apparatus, temperature sensor, time-recorder, its characterized in that: a controller for receiving information from the temperature sensor and the timer and controlling the temperature adjusting device to adjust the temperature of the instant freezing room; the temperature adjusting device is used for adjusting the instantaneous freezing chamber to operate according to a preset temperature; the temperature sensor is used for detecting the temperature of the instant freezing chamber in real time; and the timer is used for setting and monitoring the time length.
15. A refrigerator provided with an instant freezing chamber is characterized in that: the refrigerator having a control system as claimed in any one of claims 13,14 or using a method as claimed in any one of claims 1 to 12.
CN201911045322.7A 2019-10-30 2019-10-30 Instant freezing storage control method and refrigerator Withdrawn CN110906683A (en)

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JP2000325062A (en) * 1999-05-21 2000-11-28 Airtech Japan Ltd Refrigeration and refrigerator utilizing nuclear magnetic resonance
JP2003180314A (en) * 2001-12-13 2003-07-02 Morinaga Milk Ind Co Ltd Method for preserving food and method for producing unfrozen water
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