CN110953799A - Instant freezing chamber control method and refrigerator - Google Patents

Instant freezing chamber control method and refrigerator Download PDF

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Publication number
CN110953799A
CN110953799A CN201911046653.2A CN201911046653A CN110953799A CN 110953799 A CN110953799 A CN 110953799A CN 201911046653 A CN201911046653 A CN 201911046653A CN 110953799 A CN110953799 A CN 110953799A
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CN
China
Prior art keywords
cooling
freezing chamber
stage
instant
temperature
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Pending
Application number
CN201911046653.2A
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Chinese (zh)
Inventor
钱梅双
辛海亚
梁起
胡卓鸣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
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 CN201911046653.2A priority Critical patent/CN110953799A/en
Publication of CN110953799A publication Critical patent/CN110953799A/en
Pending 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

The invention relates to a control method of an instant freezing chamber and a refrigerator. The instant freezing chamber control method comprises a multi-stage supercooling and cooling process, a supercooling removing process and a conventional refrigeration and preservation process. In the multi-stage supercooling and cooling process, the cooled object is cooled in stages, and the cooling of each stage is realized by cooling the cooled object in stages. And each temperature reduction stage controls the instant freezing chamber for storing the cooled object to run for Tn time according to the preset temperature Tn, so that the temperature distribution of the instant freezing chamber for storing the cooled object in the process of a single temperature reduction stage is more uniform. In the supercooling relieving process, two means of increasing the rotating speed of the condensing fan and starting the electric field generating device are used for destroying the non-freezing equilibrium state of the cooled object in the supercooling state, realizing the full relieving of the supercooling state, further realizing the instant freezing (instant freezing for short) of the cooled object, and storing the frozen cooled object at the conventional refrigeration storage temperature for a long time.

Description

Instant freezing chamber control method and refrigerator
Technical Field
The invention relates to a control method of an instant freezing chamber and a refrigerating system, in particular to a control method capable of realizing instant freezing of food and a refrigerator.
Background
In order to better maintain the nutrition of frozen food, the food is preserved by adopting the freezing modes of ordinary freezing, quick freezing and the like, but the traditional ordinary freezing has the defects of uneven temperature control in a freezing chamber, long-time stay in the 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 refrigerators. The supercooling freezing technology can ensure that the preserved object forms uniform and fine ice crystals after the supercooling process, can better keep the flavor of food compared with the common freezing method, and is more favorable for cutting.
The existing technology for supercooling preservation has the following disadvantages:
(1) the supercooling is released in advance due to uneven temperature reduction in the supercooling process.
(2) The supercooling relieving effect is not good, and the wind speed or the wind volume is increased.
(3) The supercooling depth is shallow, and the state of supercooling cannot be well entered.
Disclosure of Invention
In view of the above, the invention provides an instant freezing chamber control method and a refrigerator.
The invention relates to a control method of an instant freezing chamber and a refrigerator. The instant freezing chamber control method comprises a multi-stage supercooling and cooling process, a supercooling removing process and a conventional refrigeration and preservation process. In the multi-stage supercooling and cooling process, the cooled object is cooled in stages, and the cooling of each stage is realized by cooling the cooled object in stages. And each temperature reduction stage controls the instant freezing chamber for storing the cooled object to run for Tn time according to the preset temperature Tn, so that the temperature distribution of the instant freezing chamber for storing the cooled object in the process of a single temperature reduction stage is more uniform. In the supercooling relieving process, two means of increasing the rotating speed of the condensing fan and starting the electric field generating device are used for destroying the non-freezing equilibrium state of the cooled object in the supercooling state, realizing the full relieving of the supercooling state, further realizing the instant freezing (instant freezing for short) of the cooled object, and storing the frozen cooled object at the conventional refrigeration storage temperature for a long time.
Specifically, the method comprises the following steps:
the invention provides a refrigerator, which comprises:
the instant freezing chamber, a cooling device for providing cold energy for the instant freezing chamber and a control system for controlling the cooling device to carry out instant freezing preservation on the instant freezing chamber are arranged;
the instant freezing preservation process of the cooled object in the instant freezing chamber is realized by implementing cooling control on the instant freezing chamber;
the cooling device comprises a compressor, an evaporator, a condenser and a capillary tube;
a condenser fan is arranged on the condenser;
the control system comprises a controller, a timer, a temperature sensor and an electric field generating device;
the instant freezing preservation comprises a multi-stage supercooling and cooling process, a supercooling relieving process and a conventional refrigeration preservation process;
the control system carries out staged cooling on the cooled object according to the preset operation target temperature and the preset operation duration of each multi-stage supercooling cooling process; and in the final stage of the multi-stage supercooling and cooling process, after the multi-stage supercooling and cooling process is completed within a preset time period, the rotating speed of the fan of the condenser is controlled to be increased, the rotating speed of the fan of the condenser is kept to operate for tb time, the electric field generating device is controlled to be started, the electric field generating device is ensured to operate for ta time in a starting state, and supercooling is removed.
The invention also provides a method for controlling the instant freezing chamber, which carries out instant freezing preservation on the instant freezing chamber by controlling a cooling device, and is characterized in that:
the instant freezing preservation process of the cooled object in the instant freezing chamber is realized by implementing cooling control on the instant freezing chamber;
the instant freezing preservation process with a multi-stage supercooling and cooling process, a supercooling relieving process and a conventional refrigeration preservation process is carried out on the cooled object in the instant freezing chamber through a cooling device;
the multi-stage supercooling and cooling process comprises n cooling stages, wherein each cooling stage of the n cooling stages is provided with a preset operation target temperature and a preset operation duration; the multi-stage supercooling and cooling process carries out staged cooling on the cooled object according to a preset running target temperature and a preset running time;
and in the final stage of the multi-stage supercooling and cooling process, after the preset stage cooling is finished within a preset time period: controlling the fan speed of the condenser to be increased from the first fan speed S1 to the second fan speed S2, and keeping the second fan speed S2 at the condenser fan speed for a preset tb time; the electric field generating device is controlled to be started, and the electric field generating device is ensured to operate for a time ta in a starting state; the supercooling is released.
Preferably, the value range of the preset ta operating time is 0h < ta < 10h, and the value range of the preset tb operating time is 0h < tb < 10 h.
Preferably tb ≧ ta.
Preferably, in the 1 st stage of the multi-stage supercooling and cooling process, the rotation speed of the compressor is operated at the second rotation speed M2, and after the 1 st stage of the multi-stage supercooling and cooling process is finished, the compressor is operated at the first rotation speed M1 which is lower than the second rotation speed M2.
Preferably, the condenser fan is kept running at the first rotating speed S1 in the whole process of cooling by stages of supercooling; the supercooling release process condenser fan operates at the second fan rotating speed S2, and can apply maximum cooling capacity to the cooled object.
Preferably, the supercooling release process controller performs the action of increasing the rotation speed of the condenser fan at the same time or in a different order from the action of turning on the electric field generating device.
Preferably, the electric field generating device can control the instant freezing chamber to generate an electrostatic field or an alternating electric field.
Preferably, the n cooling stages are at least at the last cooling stage, and after reaching the cooling target, the n cooling stages are stabilized at the preset target temperature for a period of time until the preset time of the cooling process is finished.
Preferably, n cooling stages exist in the cooling process, the n cooling stages are divided into 1 st stage, … … i stage and … … th stage, wherein the ith cooling stage represents any one stage of the n cooling stages, i is more than or equal to 1 and less than or equal to n, n is a natural number and is more than or equal to 2, the start and stop of the air supply device are controlled according to the preset temperature of the cooling stages, namely T is used for controlling the start and stop of the air supply deviceONi＝Ti+TB1The temperature T is used as the starting temperature point of the air supply device in the ith stageoffi＝TONi-TB2[ ii ] 2 as the shutdown temperature point of the blower in the i-th stage, TB1Indicates the floating temperature T of the starting point of the instantaneous freezing chamber in the starting process of the compressorB2Temperature difference between instant freezing chamber start and stop, TONi>Ti>Toffi；
In the i-th stage:
when the storage temperature of the instant freezing chamber reaches TONi＝Ti+TB1When the pressure exceeds 2, the air supply device is controlled to work;
when the storage temperature of the instant freezing chamber reaches Toffi＝TONi-TB2And when the pressure exceeds 2, controlling the air supply device not to work.
Preferably, the air supply device is a cold air supply door for performing cold supply control of the instant freezing chamber.
Preferably, the value range of the time ti for cooling control on the cooled object in the ith stage in the multi-stage supercooling and cooling process is 0h < ti ≦ 8 h.
Preferably, the preset target temperature of the supercooling cooling stage satisfies: t1 is more than or equal to 0 ℃ at the temperature of 5 ℃; tn is more than or equal to-15 ℃, T2 is more than or equal to 0 ℃, i is more than or equal to 2 and less than or equal to n.
Preferably, the conventional refrigeration storage process is carried out such that the cooled material is operated at a predetermined temperature Tc of-7 ℃ Tc <0 ℃.
Preferably, the control method for the conventional preservation process to operate according to the preset temperature Tc comprises the following steps: when the temperature of the instant freezing chamber (12) reaches the starting temperature point TONc, opening an air door of the instant freezing chamber (12); when the temperature of the instant freezing chamber reaches a first shutdown temperature point TOFFc, closing the air door of the instant freezing chamber; t isONc＝Tc+TB1/2,TOFFc＝TONc–TB2/2；TB1Indicating the floating temperature of a starting point of an instant freezing chamber in the starting process of the compressor; t isB2The temperature difference between the start and stop of the instant freezing chamber.
Preferably, TB1The value range of (A) is 0 DEG C<TB1≤2℃，TB2The value range of (A) is 0 DEG C<TB2≤2℃。
Preferably, in the multi-stage supercooling and cooling process, the electric field generating device is in a closed state in the process of performing the staged cooling on the object to be cooled.
Preferably, the normal storage process compressor speed keeps the first speed M1 running, the electric field generating device is in the off state, and the condenser fan returns to the fan first speed S1 running.
The invention also provides a refrigerator which is provided with the control system for realizing the instant freezing chamber control method. The refrigerator comprises an instant freezing chamber, and the instant freezing chamber adopts the instant freezing chamber control method to carry out instant freezing storage on the cooled object.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely exemplary embodiments of the present disclosure, and other drawings may be derived by those skilled in the art without inventive effort.
FIG. 1 is a control logic diagram of an embodiment of the present invention;
FIG. 2 is a diagram of a refrigeration system according to an embodiment of the present invention;
FIG. 3 is a refrigerant flow diagram according to an embodiment of the present invention;
FIG. 4 is a structural view of a refrigerator according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a freezing curve of water at normal freezing in accordance with an embodiment of the present invention;
FIG. 6 is a schematic diagram of the freezing curve of water in an embodiment of the present invention in the presence of a supercooling freezing process;
FIG. 7 is a schematic structural diagram of an instant freezing chamber according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a refrigerator control system according to an embodiment of the present invention;
FIG. 9 is a graph of temperature versus time for a food product stored in a flash chamber throughout a sub-cooling process in an embodiment of the present invention;
in the figure:
refrigerator-10; a refrigerating chamber-11; instant freezing chamber-12; freezing chamber-13; an electric field generating device power supply section-14;
a flash freezing storage area box-121; an electric field generating device discharge plate portion-122;
a refrigeration system-20; a refrigeration evaporator-21; a muffler assembly-220; a return gas heat exchange section-221; a compressor-23; condenser-24; anti-condensation pipe-25; a drier-filter-26; capillary-27;
control system-30; a controller-31; a display-32; a temperature sensor-33; a temperature regulating device-34; a frequency conversion plate-35; a timer-36; a condenser fan-37;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
The instant freezing technique is briefly described below with reference to fig. 5 and 6.
The supercooled state refers to a liquid having a temperature lower than the freezing point but not solidified or crystallized, and is called a supercooled liquid. There is a great demand for long-term preservation of foods such as fresh meat, fruits and vegetables in daily life. The fresh meat, fruits and vegetables and other foods contain a large amount of water, and the ice crystals are large in size and usually form needle-shaped ice crystals during ordinary freezing, so that cells can be damaged, a large amount of juice flows out during thawing, large ice crystals can extrude the tissue structure of the foods, the foods lose delicate flavor substances, and the user experience is poor.
The condition of the food entering the overcooling state mainly influences whether the food can well enter the overcooling state or not according to the temperature reduction speed, the air temperature distribution around the sample and the difference value of the surface temperature and the central temperature of the food. Fig. 5 shows a schematic diagram of a normal freezing and freezing curve of water, namely a freezing and freezing curve without supercooling, and fig. 6 shows a schematic diagram of a freezing curve of water with supercooling freezing process. Analysis shows that the ordinary freezing process of water in fig. 5 is that the water slowly begins to freeze from the surface of the water with the increase of time. In contrast, fig. 6 shows the supercooling freezing process of water, in the initial stage of the freezing process, even if the freezing point of water is exceeded, the water does not start to freeze but continues to remain in a liquid state, and when the temperature drops to the nucleation point or a certain stimulus is externally applied, the water in the supercooled state instantaneously starts to freeze on the surface and inside.
The principle of the supercooling freezing technology is that ice nuclei in water are uniformly distributed and are in a large number when the ice nuclei begin to freeze after being in a supercooling state, most of ice crystals formed after freezing are in an elliptic granular shape, and the ice crystals have small volume and uniform size and are different from needle-shaped ice crystals which are generated by common freezing and are easy to damage cells. The food in the supercooled state can better keep the delicate flavor of the food, reduce the damage of ice crystals to food cells, reduce the outflow of the contents of the food cells after unfreezing and improve the user experience.
The basic inventive idea is as follows:
the invention provides a method for controlling an instant freezing chamber and a refrigerator, which ensure that a cooled object in the instant freezing chamber 12 enters a supercooled state through multistage cooling in a multistage supercooling cooling process. The rotating speed of a condensing fan is controlled to be increased in the supercooling relieving process, and the supply of cold energy is increased; and simultaneously, an electric field is applied to the instant freezing chamber to destroy the supercooled and unfrozen state of the water or the ionic solution in the cooled object, so that ice nuclei are induced to form, the supercooled state of the cooled object in the instant freezing chamber is removed, instant freezing is realized, and uniform and fine ice crystals are formed. And finally, the temperature of the instant freezing chamber 12 is controlled to be within the range of the conventional refrigeration preservation temperature, so that the cooled object is preserved for a long time.
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings 1-4 and 7-9:
the embodiment shown in fig. 2 provides a refrigeration system that performs any of the control methods of the present invention. The system comprises but is not limited to the following components: a freezing evaporator 21; a muffler assembly 220; a return gas heat exchange section 221; a compressor 23; a condenser 24; an anti-condensation tube 25; a drying filter 26; a capillary 27.
As shown in fig. 3, the refrigerant flow direction when the refrigeration system is in operation is: compressor → condenser → anti-condensation tube → dry filter → capillary tube → refrigeration evaporator → return air tube component → compressor.
As shown in fig. 8, the present embodiment relates to a control system capable of implementing instant freezing preservation, which includes: the control system comprises a controller 31, a display 32, a temperature sensor 33, a temperature adjusting device 34, a frequency conversion plate 35, a timer 36, a condenser fan 37 and an electric field generating device power supply part 14, wherein the controller 31 is in control connection with the display 32, the temperature sensor 33, the temperature adjusting device 34, the frequency conversion plate 35, the timer 36, the condenser fan 37 and the electric field generating device power supply part 14, and the rotating speed of the compressor 23 is controlled. The control system is used for realizing the instant freezing chamber control method provided by the invention.
Further, the controller 31 in the control system sends a compressor rotation speed adjusting instruction to the frequency conversion plate 35, and the frequency conversion plate 35 adjusts the rotation speed of the compressor 23. The inverter board in this embodiment is only one example of a compressor speed adjusting device, and should not be understood as the only means for adjusting the compressor speed by using the inverter board.
Further, the temperature adjusting device 34 adjusts the temperature of the instant freezing chamber by using a cold air supply door of the instant freezing chamber.
Further, the user may select the instant freezing function through the display 32, and the control system performs the instant freezing chamber control method when the user selects the instant freezing function.
Furthermore, the electric field generating device in the control system can enable the instant freezing chamber to generate an electrostatic field or an alternating electric field, the electric field generating device can be controlled by the control device to generate electric fields with different intensities, and the frequency of the electric field and other electric field related physical quantities can be controlled.
Further, the instant freezing chamber is provided with a temperature sensor, the surface temperature of the cooled object and/or the central temperature of the cooled object stored in the instant freezing chamber can be detected, and a temperature signal is transmitted to the controller, and the controller further controls and adjusts the type of the electric field generated by the electric field generating device, the electric field intensity and the frequency of the alternating electric field according to the analysis and processing of the temperature signal.
The beneficial effects are that: different electric field types, different electric field intensities and electric field frequencies play different roles in different stages in the whole process of supercooling release. Water conversion from liquid to solid phaseTwo processes are followed: first an ice nucleation process and then an ice crystal growth process. For food, especially fresh meat and fresh fruit and vegetable, the cell solution contains different ions (such as Na)+，K+，Cl-Etc.) different electric field types and different electric field frequencies have different effects and actions on the supercooling release process of the chilled fresh food. The temperature detection of the cold fresh food in the supercooling stage can judge that the cold fresh food is in different stages of the supercooling removing process, including the formation of crystal nuclei and the growth of ice crystals. Electric fields of different types and strengths are applied aiming at different stages of the supercooling relieving process of the cold fresh food, the supercooling relieving of the cold fresh food is fully realized, and ice crystals which are uniformly distributed, small in size and mellow are formed.
The embodiment also provides a refrigerator which is provided with the control system for realizing the instant freezing chamber control method. The refrigerator comprises an instant freezing chamber, and the instant freezing chamber adopts the instant freezing chamber control method to carry out instant freezing storage on the cooled object. The cooled material can be food, especially fresh meat food.
As shown in fig. 4, the refrigeration system performing any of the control methods of the present invention may be a refrigerator including a refrigerating compartment 11, a flash freezing compartment 12, a freezing compartment 13, and an electric field generating device power supply section 14, and the present embodiment provides a refrigerator having a control system therein, which enables the refrigerator to perform a flash freezing control process for food placed in the flash freezing compartment 12.
The instant freezing chamber 12 in this embodiment can realize various low-temperature storage processes of food, such as a supercooling non-freezing storage process, a supercooling freezing removal storage process, a low-temperature refrigeration function, a freezing process, and the like. The user can select the storage process according to the self needs, and the instant freezing chamber can only realize the instant freezing storage process shown in the embodiment.
As shown in fig. 7, the instant freezing storage area box 121 is included in the instant freezing chamber, and an electric field generating device discharging plate part 122 is included, and the electric field generating device discharging plate part 122 is disposed at the bottom of the instant freezing storage area box 121.
Further, fig. 7 is only an example of the structure and position of the discharge plate of the electric field generating apparatus of the present invention, and should not be construed as a limitation to the implementation of the present invention. The discharge plates can be arranged on the periphery or the top of the instant freezing chamber, and the number of the discharge plates is more than or equal to one.
The instant freezing chamber control method according to the present embodiment will be described below.
As shown in fig. 1, a method for controlling an instant freezer includes the steps of:
s01: a multi-stage cooling and supercooling process:
n cooling stages are arranged in the multi-stage cooling and supercooling process and are divided into the 1 st stage, … … i stage and the … … th stage, wherein the ith cooling stage represents any one stage of the n cooling stages, i is more than or equal to 1 and less than or equal to n, n is a natural number and is more than or equal to 2, and all the following limitations on any one stage are replaced by the ith stage.
1, cooling stage: the instant freezing chamber is controlled by the control device to operate at the preset temperature T1 for T1 time, the rotating speed of the compressor is increased within T1 time, and the compressor operates at the second rotating speed M2.
Further, the second rotation speed M2 to which the compressor is increased may be the maximum rotation speed of the compressor.
Furthermore, T1 is more than 0 ℃ at the temperature of 5 ℃ or more, and T1 is more than 0h at the temperature of 8h or more.
Further, in the present embodiment, the control of the cooling of the food stored in the instant freezing chamber is achieved by controlling the temperature of the instant freezing chamber and performing the cooling control on the instant freezing chamber.
The beneficial effects are that: when the food needs to be cooled, the rotating speed of the compressor is increased, so that the cooling capacity can be increased, the cooling rate of the instant freezing chamber is increased, the food is quickly stabilized near the temperature T1, and the temperature T1 is in a low-temperature interval above zero. Thereby shortening the preliminary preparation time for the food to enter the supercooled state. The first temperature reduction stage controls the instantaneous freezing chamber to operate according to the preset temperature T1, so that the temperature of the instantaneous freezing chamber is kept in a small-range temperature interval which is zero and contains the temperature T1, the overall temperature of the instantaneous freezing chamber is uniformly reduced in the subsequent multi-stage supercooling temperature reduction process, the temperature difference between the surface and the inside of the food placed in the instantaneous freezing chamber is smaller, and the food can smoothly enter a supercooling state in the subsequent staged temperature reduction process.
Further, before step S01, the method further includes the steps of: aS 01: the user selects the instant freeze function.
An i +1 th cooling stage: and after the step of the 1 st temperature reduction stage is finished, the compressor is operated at a first rotating speed M1, and the first rotating speed M1 of the compressor is less than a second rotating speed M2. In the S01 multi-stage cooling and supercooling process, the power supply generating device is always in a closed state, and the condensing fan is always operated at the first fan rotating speed S1. The cooling method has the beneficial effects that the rotating speed of the compressor at the (i + 1) th cooling stage is recovered to M1, and the cooling capacity can be reduced by reducing the rotating speed of the compressor. When the cooled food enters the overcooling state, the slow cooling rate and the low cooling capacity are needed, so that the effect that the cooled food successfully enters the overcooling state and is not easily released from the overcooling state can be realized, and therefore, the effect can be realized by reducing the rotating speed of the compressor.
The supercooling and cooling stage comprises n cooling stages, each cooling stage of the n cooling stages implements cooling control on the instant freezing chamber 12, implements temperature control on the instant freezing chamber 12 according to the preset temperature Ti of the cooling stage, and controls the operation Ti time of the ith cooling stage.
Further, during the control process of air cooling on the food in the i stage, T is usedONi＝Ti+TB1The temperature T is used as the starting temperature point of the air supply device in the ith stageoffi＝TONi-TB2[ ii ] 2 as the shutdown temperature point of the blower in the i-th stage, TB1Indicates the floating temperature T of the starting point of the instant freezing chamber (2) in the starting process of the compressorB2Temperature difference between instant freezing chamber start and stop, TONi>Ti>Toffi。
In the i-th stage:
when the storage temperature of the instant freezing chamber reaches TONi＝Ti+TB1When the pressure exceeds 2, the air supply device is controlled to work;
when the storage temperature of the instant freezing chamber reaches Toffi＝TONi-TB2At/2, control the feedingThe wind device does not work.
Furthermore, the value range of the time ti for cooling control on the cooled object in the ith stage in the multi-stage supercooling and cooling process is 0h < ti is less than or equal to 8 h. The beneficial effects are that: the timing of the cooling time tn is implemented through the timing device in the single cooling stage, so that the temperature difference between the surface and the inside of the food is favorably reduced for the single cooling stage, the success probability of the food entering the supercooling state is increased, and the condition that the food which enters the supercooling state is easily released from the supercooling state in advance can be avoided.
Further, TB1The value range of (A) is 0 DEG C<TB1≤2℃，TB2The value range of (A) is 0 DEG C<TB2≤2℃。
Further, the air supply device is controlled to control a cold air supply door of the instant freezing chamber.
Further, the cooling air door is provided with a baffle capable of realizing mechanical control.
Furthermore, the value range of the first rotating speed M1 of the compressor is that the rotating speed is more than or equal to 1200rpm and less than or equal to M1 and less than or equal to 1400rpm, and the value range of the second rotating speed M2 of the compressor is that the rotating speed is more than or equal to 3800rpm and less than or equal to M2 and less than or equal to 4500 rpm.
Furthermore, Tn is more than or equal to 15 ℃ and less than or equal to 0 ℃ in the (i + 1) th cooling stage in the multi-stage cooling and supercooling process, and T2 is more than or equal to 0 ℃ and i is more than or equal to 2 and less than or equal to n.
S02: supercooling release process: in the final stage of the multi-stage supercooling and cooling process, after the preset stage cooling is completed within a preset time period, the fan of the condenser is controlled to increase from the first rotating speed S1 of the fan to the second rotating speed S2 of the fan, the rotating speed of the fan of the condenser keeps the second rotating speed S2 of the fan to operate for a preset tb time, and the controller controls the electric field generating device to be started in the supercooling removing process, and ensures that the electric field generating device operates for the ta time in the started state to remove supercooling.
Further, the second rotation speed S2 of the fan is the maximum rotation speed of the condenser fan, and when the rotation speed of the condenser fan is increased to S2 in the instant freezing chamber control method, the maximum cooling capacity can be provided to the instant freezing chamber.
Further, the action of the controller to increase the rotational speed of the condenser fan may be performed simultaneously with or in a different order than the action of the electric field generating device being turned on.
Further, tb is more than or equal to ta, namely the condenser fan keeps the second fan rotating speed S2 for a period of time after the electric field generating device is turned off or the condenser fan is restored to the smaller first fan rotating speed S1 while the electric field generating device is turned off. The beneficial effects are that: the electric field has a large influence on the nucleation of the solution contained inside the food and the growth process of the ice crystals. Therefore, the electric field can be added in the early stage of the supercooling relieving stage to promote the nucleation of the supercooled food, and the electric field has the effect of inhibiting the growth of ice crystals in the ice crystal growth stage of the food in the supercooling relieving process. The final stage of the supercooling relieving process is a stage of completely freezing the food, an electric field can be added or not added in the process, but the compressor still needs to keep a larger or maximum rotating speed to promote the food to be completely frozen as soon as possible.
This has the advantage that the supercooled state is unstable, and that a certain stimulus is required to release the supercooled state, and this stimulus may be a temperature factor or a physical factor. On one hand, the rotation speed of the compressor is increased, the higher the rotation speed is, the higher the compression ratio is in unit time, the exhaust volume is also increased, the circulation of the refrigerant is accelerated, the refrigeration effect is improved, and the purpose of increasing the cooling capacity supplied to the instant freezing chamber 2 in the supercooling release stage is achieved. On the other hand, different electric field types are applied to the food supercooling relieving process, and different electric field strengths and electric field frequencies are adjusted, so that the electric field can play different roles in different stages in the whole food supercooling relieving process. If the supercooling stage is just released to promote the nucleation, the growth of the ice crystals is inhibited in the ice crystal growth stage, and the bacteriostasis effect is also achieved. The rotating speed of the compressor is increased, and the electric field is applied to the instant freezing chamber, so that the time for releasing the overcooling state of the food can be shortened, the overcooling state of the food can be released more easily, and the formed ice crystals are distributed more uniformly. The rotating speed of the compressor is increased in the instant freezing chamber to change the cooling capacity of the food, so that the defect that the food is dehydrated and dried when the cooling capacity is increased by an air cooling method is overcome.
After the food is released from the overcooling state, uniform, fine and smooth ice crystals can be quickly formed to achieve the effect of instant freezing, and the formed fine ice crystals have smaller damage to tissues, fibers or cells of the food, particularly meat products, compared with large needle-shaped ice crystals formed by common freezing. The loss of nutrient substances of the food after thawing can be better avoided, and the flavor of the food can be better maintained.
Furthermore, the value range of the first rotating speed S1 of the fan is that S1 is more than or equal to 1200rpm and less than or equal to 1500rpm, and the value range of the second rotating speed S2 of the fan is that M1 is more than or equal to 1600rpm and less than or equal to 1900 rpm.
Furthermore, the value range of the time tb is 0h < tb ≦ 10 h.
Furthermore, the value range of the time ta is 0h < ta ≦ 10 h.
S03: and (3) conventional refrigeration preservation process: during the normal refrigeration preservation process, the compressors run at a first rotating speed M1, and the condenser fans run at a fan first rotating speed S1; the electric field generating device is kept in a closed state all the time in the conventional refrigeration preservation process. The controller controls the instant freezing chamber to be within the conventional refrigeration preservation temperature range according to the preset temperature Tc.
Further, the value range of the preset temperature Tc in the conventional refrigeration storage stage is that Tc is more than or equal to minus 7 ℃ and less than 0 ℃.
Further, the method for controlling the instant freezing chamber within the conventional refrigeration preservation temperature range according to the preset temperature Tc by the conventional preservation phase chamber comprises the following steps: when the temperature of the instant freezing chamber reaches a first starting temperature point TONc, opening an air door of the instant freezing chamber; when the temperature of the instant freezing chamber reaches a first shutdown temperature point TOFFc, closing the air door of the instant freezing chamber; t isONc＝Tc+TB1/2,TOFFc＝TONc–TB2/2；TB1Indicating the floating temperature of a starting point of an instant freezing chamber in the starting process of the compressor; t isB2The temperature difference between the start and stop of the instant freezing chamber.
The method has the beneficial effect that the shelf life of the food in the supercooling process can be prolonged in the conventional refrigeration preservation. The opening and closing of the air door of the instant freezing chamber are controlled by judging the temperature of the instant freezing chamber, so that the functions of controlling the instant freezing chamber according to the preset temperature Tc and reducing energy consumption can be realized simultaneously, and the economic efficiency of the instant freezing chamber control method is improved.
As shown in fig. 9, fig. 9 is a graph of the temperature of the food stored in the instant freezing chamber as a function of time during the whole supercooling process according to the embodiment of the present invention. And (3) rapidly cooling the instant freezing chamber in the temperature range above zero degree in the S01A stage. The temperature of the food starts to be ready to enter the supercooled state at the low temperature region T1 slightly higher than zero. The stage S01B is a stage of supercooling, in which the temperature of the food is slowly reduced under the control of the cooling of the instant freezing chamber, the temperature of the food is lower than the freezing point of the food and is not frozen, and the food is successfully in a supercooled state. The supercooling release process of S02 in this embodiment increases the rotational speed of the condenser fan to increase the amount of cooling supplied to the flash chamber during the supercooling release process, thereby releasing the supercooled state from the temperature of the food. When the food is in the supercooling state, the food undergoes an instant freezing process, namely the temperature of the food is rapidly increased from the temperature lower than the freezing point in the supercooling state to the freezing point temperature, and the temperature of the food is maintained at the freezing point temperature for a period of time in the freezing process until the food is completely frozen. The instant freezing chamber is controlled at a preset temperature Tc during the regular refrigerated preservation at S03 such that the temperature of the food is lowered from the freezing point temperature to the Tc temperature, and the temperature of the food is maintained at substantially the Tc temperature during the subsequent regular refrigerated preservation.
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 (19)

1. A refrigerator characterized in that:
the instant freezing chamber, a cooling device for providing cold energy for the instant freezing chamber and a control system for controlling the cooling device to carry out instant freezing preservation on the instant freezing chamber are arranged;
the instant freezing preservation process of the cooled object in the instant freezing chamber is realized by implementing cooling control on the instant freezing chamber;
the cooling device comprises a compressor, an evaporator, a condenser and a capillary tube;
a condenser fan is arranged on the condenser;
the control system comprises a controller, a timer, a temperature sensor and an electric field generating device;
the instant freezing preservation comprises a multi-stage supercooling and cooling process, a supercooling relieving process and a conventional refrigeration preservation process;
the control system carries out staged cooling on the cooled object according to the preset operation target temperature and the preset operation duration of each multi-stage supercooling cooling process; after the multi-stage supercooling and cooling process is completed within a preset time period, the rotating speed of a fan of the condenser is controlled to increase and the electric field generating device is started to remove supercooling, and the rotating speed of the fan of the condenser after the increase is kept for tb time and the electric field generating device is ensured to operate for ta time in a starting state, so that the cooled object is completely frozen.
2. A method for controlling an instant freezing chamber, which performs instant freezing preservation on the instant freezing chamber by controlling a cooling device, is characterized in that:
the instant freezing preservation process of the cooled object in the instant freezing chamber is realized by implementing cooling control on the instant freezing chamber;
the instant freezing preservation process with a multi-stage supercooling and cooling process, a supercooling relieving process and a conventional refrigeration preservation process is carried out on the cooled object in the instant freezing chamber through a cooling device;
the multi-stage supercooling and cooling process comprises n cooling stages, wherein each cooling stage of the n cooling stages is provided with a preset operation target temperature and a preset operation duration; the multi-stage supercooling and cooling process carries out staged cooling on the cooled object according to a preset running target temperature and a preset running time;
the multi-stage supercooling and cooling process enters a supercooling relieving process after the preset stage cooling is completed within a preset time period: controlling the fan speed of the condenser to be increased from the first fan speed S1 to the second fan speed S2, and keeping the second fan speed S2 at the condenser fan speed for a preset tb time; the electric field generating device is controlled to be started, and the electric field generating device is ensured to operate for a time ta in a starting state; until the cooled object is completely frozen.
3. The instant freezer control method of claim 2, wherein: the value range of the preset ta running time is 0h < ta < 10h, and the value range of the preset tb running time is 0h < tb < 10 h.
4. The instant freezer control method of claim 3, wherein: tb is more than or equal to ta.
5. The instant freezer control method of claim 4, wherein: in the 1 st stage of the multi-stage supercooling and cooling process, the rotating speed of the compressor runs at the second rotating speed M2, and after the 1 st stage of the multi-stage supercooling and cooling process is finished, the compressor runs at the first rotating speed M1 which is lower than the second rotating speed M2.
6. The instant freezer control method of claim 5, wherein: the condenser fan keeps running at a first rotating speed S1 in the whole process of the supercooling staged cooling; the supercooling release process condenser fan operates at the second fan rotating speed S2, and can apply maximum cooling capacity to the cooled object.
7. The instant freezer control method of claim 6, wherein: the action of the subcooling-release process controller to increase the rotational speed of the condenser fan may be performed simultaneously with or in a different order than the action of the electric field generating device to turn on.
8. The instant freezer control method of claim 7, wherein: the electric field generating device can control the instant freezing chamber to generate an electrostatic field or an alternating electric field.
9. The instant freezer control method of claim 8, wherein: and the n cooling stages are at least at the last cooling stage, and are stabilized at the preset target temperature for a period of time after reaching the cooling target until the preset time of the cooling process is finished.
10. The instant freezer control method of claim 9, wherein: n cooling stages exist in the cooling process, the n cooling stages are divided into stages 1, … … i and … … n, wherein the cooling stage i represents any one of the n cooling stages, i is more than or equal to 1 and less than or equal to n, n is a natural number and is more than or equal to 2, the air supply device is controlled to start and stop according to the preset temperature of the cooling stage, namely T is used for controlling the air supply device to start and stopONi＝Ti+TB1The temperature T is used as the starting temperature point of the air supply device in the ith stageoffi＝TONi-TB2[ ii ] 2 as the shutdown temperature point of the blower in the i-th stage, TB1Indicates the floating temperature T of the starting point of the instantaneous freezing chamber in the starting process of the compressorB2Temperature difference between instant freezing chamber start and stop, TONi>Ti>Toffi；
In the i-th stage:
when the storage temperature of the instant freezing chamber reaches TONi＝Ti+TB1When the pressure exceeds 2, the air supply device is controlled to work;
when the storage temperature of the instant freezing chamber reaches Toffi＝TONi-TB2And when the pressure exceeds 2, controlling the air supply device not to work.
11. The instant freezer control method of claim 10, wherein: the air supply device is a cold air supply door for implementing cold supply control of the instant freezing chamber.
12. The instant freezer control method of claim 11, wherein: the value range of the time ti for cooling control on the cooled object in the ith stage in the multi-stage supercooling and cooling process is 0h < ti is less than or equal to 8 h.
13. The instant freezer control method of claim 12, wherein: the preset target temperature in the supercooling cooling stage meets the following requirements: t1 is more than or equal to 0 ℃ at the temperature of 5 ℃; tn is more than or equal to-15 ℃, T2 is more than or equal to 0 ℃, i is more than or equal to 2 and less than or equal to n.
14. The instant freezer control method of claim 13, wherein: in the conventional refrigeration storage process, the cooled object is operated according to the preset temperature Tc, wherein Tc is more than or equal to minus 7 ℃ and less than 0 ℃.
15. The instant freezer control method of claim 14, wherein: the control method for the conventional storage process to operate according to the preset temperature Tc comprises the following steps: when the temperature of the instant freezing chamber (12) reaches the starting temperature point TONc, opening an air door of the instant freezing chamber (12); when the temperature of the instant freezing chamber reaches a first shutdown temperature point TOFFc, closing the air door of the instant freezing chamber; t isONc＝Tc+TB1/2,TOFFc＝TONc–TB2/2；TB1Indicating the floating temperature of a starting point of an instant freezing chamber in the starting process of the compressor; t isB2The temperature difference between the start and stop of the instant freezing chamber.
16. The instant freezer control method of claim 15, wherein: t isB1The value range of (A) is 0 DEG C<TB1≤2℃，TB2The value range of (A) is 0 DEG C<TB2≤2℃。
17. A method of controlling an instant freezer as claimed in any one of claims 2 to 16 wherein: in the multi-stage supercooling and cooling process, the electric field generating device is in a closed state in the process of carrying out the staged cooling on the cooled object.
18. The instant freezer control method of claim 17, wherein: in the conventional preservation process, the rotating speed of the compressor keeps the first rotating speed M1 to operate, the electric field generating device is in a closed state, and the condenser fan is restored to the first rotating speed S1 of the fan to operate.
19. A refrigerator, characterized in that: the refrigerator comprises an instant freezing chamber (12), and the instant freezing chamber (12) adopts the instant freezing chamber control method of any one of claims 2 to 18.
CN201911046653.2A 2019-10-30 2019-10-30 Instant freezing chamber control method and refrigerator Pending CN110953799A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001086967A (en) * 1999-09-22 2001-04-03 Airtech Japan Ltd Method for freezing and freezer using variance of magnetic field or electric field
CN101375120A (en) * 2006-02-15 2009-02-25 Lg电子株式会社 Apparatus for supercooling, and method of operating the same
CN101636625A (en) * 2007-04-17 2010-01-27 三菱电机株式会社 Refrigerator and method of refrigeration
JP2019000010A (en) * 2017-06-13 2019-01-10 株式会社Ｍｏｔｏ Quick cooling device
CN109253572A (en) * 2018-09-12 2019-01-22 合肥晶弘电器有限公司 A kind of refrigeration equipment and its control method of achievable supercooling preservation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001086967A (en) * 1999-09-22 2001-04-03 Airtech Japan Ltd Method for freezing and freezer using variance of magnetic field or electric field
CN101375120A (en) * 2006-02-15 2009-02-25 Lg电子株式会社 Apparatus for supercooling, and method of operating the same
CN101636625A (en) * 2007-04-17 2010-01-27 三菱电机株式会社 Refrigerator and method of refrigeration
JP2019000010A (en) * 2017-06-13 2019-01-10 株式会社Ｍｏｔｏ Quick cooling device
CN109253572A (en) * 2018-09-12 2019-01-22 合肥晶弘电器有限公司 A kind of refrigeration equipment and its control method of achievable supercooling preservation

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Application publication date: 20200403