CN110953817A - Instant freezing storage control method and refrigerator - Google Patents

Instant freezing storage control method and refrigerator Download PDF

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Publication number
CN110953817A
CN110953817A CN201911045360.2A CN201911045360A CN110953817A CN 110953817 A CN110953817 A CN 110953817A CN 201911045360 A CN201911045360 A CN 201911045360A CN 110953817 A CN110953817 A CN 110953817A
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CN
China
Prior art keywords
temperature
stage
cooling
instant freezing
control method
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Withdrawn
Application number
CN201911045360.2A
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Chinese (zh)
Inventor
钱梅双
辛海亚
梁起
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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Priority to CN201911045360.2A priority Critical patent/CN110953817A/en
Publication of CN110953817A publication Critical patent/CN110953817A/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Withdrawn legal-status Critical Current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
    • 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
    • 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 instant freezing control method comprises a multi-stage supercooling and cooling process, a supercooling relieving process and a conventional refrigerating and storing process, wherein the multi-stage supercooling and cooling process is used for carrying out staged cooling on a cooled object, and the cooling of each stage is realized by carrying out cooling control on the cooled object.

Description

Instant freezing storage control method and refrigerator
Technical Field
The invention relates to a control method for instant freezing storage and a refrigeration system, in particular to a control method for instant freezing storage 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 control method and a refrigeration system.
The instant freezing control method comprises a multi-stage supercooling and cooling process, a supercooling relieving process and a conventional refrigerating and storing process, wherein the multi-stage supercooling and cooling process is used for carrying out staged cooling on a cooled object, and the cooling of each stage is realized by carrying out cooling control on the cooled object.
Specifically, the method comprises the following steps:
the invention provides a control method for instant freezing storage, which comprises a multi-stage cooling and supercooling process, a supercooling release process and a conventional refrigeration storage process, and is characterized in that:
the multi-stage cooling and supercooling process adopts staged cooling;
continuously collecting the real-time temperature Tn of the cooled object at a preset time interval delta t from a preset time t1 after the staged temperature reduction process starts, and comparing the real-time temperature Tn of the cooled object obtained at the Tn-th time with the temperature Tn-1 of the cooled object monitored before the preset time interval delta t;
and if △ T is (Tn-Tn-1) >0, the supercooling release is executed.
Preferably, if △ T is (Tn-1) <0, continuously determining whether the detection time Tn is greater than or equal to the multi-stage temperature reduction and supercooling process time maximum threshold value ts;
and if tn is larger than or equal to ts, the supercooling removing process operation is carried out.
Preferably, if tn < ts, the supercooling process is continuously performed.
Preferably, the value range of the preset time interval delta t for acquiring the real-time temperature of the cooled object is more than 0 and less than or equal to 2 min.
Preferably, the preset time t1 is set after the 1 st stage of the multi-stage temperature-reducing and supercooling process.
Preferably, the multi-stage cooling and supercooling process time maximum threshold value ts is the time required by the cooled object to achieve sufficient supercooling, and the value range of ts is 0 < ts ≦ 10 h.
Preferably, the multi-stage cooling includes n stages, each stage of the multi-stage cooling process controls the air supply device performing air cooling according to a preset temperature Tn of the cooling stage, the n cooling stages are divided into 1 st, … … i and … … th stages, wherein the ith cooling stage represents any stage of the n cooling stages, i is greater than or equal to 1 and less than or equal to n, n is a natural number, n is greater than or equal to 2, and all definitions of any stage are replaced by the ith stage, that is:
in the ith cooling stage, an air supply device for air cooling the instant freezing chamber (12) is controlled according to the preset temperature Ti; i.e. with TONi＝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。
Preferably, in the ith 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, TB1The value range of (A) is 0 DEG C<TB1≤2℃，TB2The value range of (A) is 0 DEG C<TB2≤2℃。
Preferably, a 1 st cooling stage exists before the preset time T1, the preset temperature of the 1 st cooling stage is T1, and the compressor is controlled to operate at a second rotation speed M2 in the 1 st cooling stage; and after the 1 st temperature reduction stage is completed, the rotating speed of the compressor is adjusted to be lower than M1 rotating speed of M2, and M2 is larger than M1.
Preferably, the condenser fan keeps the first fan rotation speed S1 running all the time in the multi-stage cooling and supercooling process, and when the supercooling releasing process is executed, the condenser fan rotation speed is controlled to be increased from the first fan rotation speed S1 to the maximum rotation speed which is the second fan rotation speed S2, and the condenser fan runs at the second fan rotation speed S2 for a ta time.
Preferably, the condenser fan is maintained operating at fan first speed S1 and the compressor is operated at first speed M1 throughout the conventional refrigeration preservation process.
Preferably, the temperature of 5 ℃ is not less than T1 and is more than 0 ℃ in the first cooling stage of the multi-stage cooling and cooling process; in the conventional refrigeration storage process, the cooled object is subjected to refrigeration control, so that the cooled object runs at a preset temperature Tc of-7 ℃ to Tc less than 0 ℃.
Preferably, the control method for the regular storage stage 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.
The invention also provides a refrigerator with instant freezing and storing functions, which is provided with an instant freezing chamber (12), a refrigerating system and a control system, wherein the control system adopts any instant freezing control method to control a cooling device to realize the instant freezing function of the instant freezing chamber.
Preferably, the control system includes: the refrigeration system comprises a controller, a temperature sensor, a timer and a condenser fan, wherein the refrigeration system comprises a compressor; and the controller is in control connection with the temperature sensor, the timer and the condenser fan, and the compressor is controlled to rotate at a controlled speed.
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 flow diagram of the refrigeration for 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 controller according to an embodiment of the present invention;
FIG. 6 is a schematic view of a functional area of the instant freezer of the present invention;
FIG. 7 is a second control logic diagram of an embodiment of the present invention;
in the figure:
refrigerator-10; a refrigerating chamber-11; instant freezing chamber-12; freezing chamber-13;
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; -35 infrared sensor; a frequency conversion plate-36; timer-37; a condenser fan-38;
instant freezing functional zone-120;
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.
Example 1:
the following detailed description of embodiments of the invention is provided in conjunction with the accompanying figures 1-6:
fig. 2 shows a refrigeration system according to the present embodiment, which performs any of the control methods of the present invention. The system comprises but is not limited to the following components: refrigeration evaporator 21, return air pipeline assembly 220, return air heat exchange section 221, compressor 23, condenser 24, anti-condensation pipe 25, drier-filter 26, capillary 27.
As shown in fig. 3, the refrigerant flow direction when the refrigeration system is in operation is: compressor 23 → condenser 24 → anti-condensation tube 25 → dry filter 26 → capillary tube 27 → refrigerated evaporator 21 → air return tube assembly 220 → compressor 23.
As shown in fig. 4, the refrigeration system executing any control method of the present invention may be a refrigerator including a refrigerating chamber 11, an instant freezing chamber 12, and a freezing chamber 13, and the refrigerator according to the present embodiment has a control system therein, which enables the refrigerator to perform an instant freezing control process on an object to be cooled placed in the instant freezing chamber 12.
In this embodiment, the control of the cooling of the food stored in the flash chamber is achieved by controlling the temperature of the flash chamber and by performing cooling control on the flash chamber.
When the refrigerator implementing the instant freezing chamber control method is an air-cooled refrigerator, the rotating speed of a freezing fan of the instant freezing chamber is kept unchanged in the whole process of implementing the instant freezing chamber control method.
The present embodiment further provides a control system capable of executing the instant frozen storage control method of the present invention, including: the controller 31, the display 32, the compressor 23, the temperature adjusting device 34, the temperature sensor 33, the infrared sensor 35, the frequency conversion plate 36, the timer 37 and the condenser fan 38 are respectively in control connection with the display 32, the temperature adjusting device 34, the temperature sensor 33, the infrared sensor 35, the frequency conversion plate 36, the timer 37 and the condenser fan 38 to realize frequency conversion control on the compressor, and the control system is used for executing an instant freezing control method.
Further, the controller 31 in the control system sends a compressor rotation speed adjusting instruction to the frequency conversion board 36, and the frequency conversion board 36 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 an air supply device, which is a cooling air 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.
Further, the temperature sensor 33 is used for detecting the temperature of the instant freezing chamber and transmitting the temperature information of the instant freezing chamber to the controller 31.
Further, the infrared sensor 35 is configured to detect the temperature of the surface of the food, the timer is configured to monitor the timing of the time interval Δ T of the surface temperature of the food, the infrared sensor 35 transmits the temperature information of the surface of the food at the time Tn to the controller 31, and the controller 31 performs △ T ═ (Tn-1) >0 determination, and gives an instruction to continue the supercooling and cooling process or the supercooling release process.
The instant freezing storage control method according to the present embodiment will be described below.
As shown in fig. 1, an instant freezing control method includes the following steps:
s01: a multi-stage cooling and supercooling process:
n cooling stages are arranged in the 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 limits on any one stage are replaced by the ith stage.
S01A: 1, cooling stage: the instant freezing chamber 12 is controlled by the control device to operate at the preset temperature T1 for T1 time, the compressor operates at the second rotating speed M2 during T1 time, and the timer 37 performs timing within the time period T1. After the step S01A is finished, the compressor rotation speed is controlled to be reduced from the second rotation speed M2 to the first rotation speed M1.
The beneficial effects are that: when the object to be cooled needs to be cooled, the rotating speed of the compressor is increased, so that the cooling capacity is increased, the cooling rate of the instant freezing chamber is increased, the object to be cooled is more quickly stabilized to be close to the temperature T1, and the early preparation time of the object to be cooled entering the overcooling state is shortened. The 1 st 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 favorably kept in a small-range temperature interval containing the temperature T1, the overall temperature of the instantaneous freezing chamber is favorably and uniformly reduced in the subsequent multi-stage supercooling temperature reduction process, meanwhile, the temperature difference between the surface and the interior of the cooled object placed in the instantaneous freezing chamber is smaller, and the cooled object is more favorably and smoothly in the subsequent multi-stage supercooling state in the subsequent multi-stage temperature reduction process.
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, before step S01, the method further includes the steps of: aS 01: the user selects the instant freeze function.
Further, the refrigerator performing the instant frozen storage control method of the present embodiment is equipped with the display 32, the user can select the instant frozen storage function on the display 32 as desired, and the instant freezing chamber 12 starts to perform the step S01 when the user selects the function.
S01B: and after the step S01A is finished, the compressor is operated at a first rotating speed M1, in the S01 multi-stage cooling and supercooling process, the condenser fan is always operated at the first rotating speed S1, and the rotating speed M2 of the compressor is more than M1. The method has the advantages that the rotating speed of the compressor at the S01B 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.
Further, S01B is a single or multi-stage cooling process.
In this embodiment, S01B is a single-stage cooling process. The control system controls the instant freezing chamber 12 to operate at T2 according to the preset temperature T2, and the timer counts time at the stage.
Furthermore, T2 is more than or equal to 0 ℃ at the temperature of 2 ℃, and T2 is more than or equal to 0h for 8 h.
S01C, when the temperature reduction step of S01B is finished, the controller controls the instant freezing chamber 12 to operate according to the preset Td temperature, the surface temperature of the food is monitored in real time by the infrared sensor 35 in the instant freezing functional area in the operation process of the instant freezing chamber 12 according to the preset Td temperature, the real-time temperature of the cooled object is continuously collected at the preset time interval delta t, and the real-time temperature Tn of the cooled object obtained at the Tn-th time is compared with the temperature Tn-1 of the cooled object monitored before the preset time interval delta t;
if △ T is (Tn-Tn-1) >0, the subcooling process operation is released;
if △ T is (Tn-Tn-1) <0, the instant freezing chamber 12 continues to operate according to the preset Td temperature;
furthermore, the food temperature can be detected in various ways, and the temperature inside the food can also be detected, and the infrared sensor used as the detection device for the food temperature in the embodiment should not be construed as limiting the only means for realizing the food temperature detection in the present invention.
Further, the maximum time threshold ts of the multi-stage cooling and supercooling process is the time for ensuring that the food in the instant freezing chamber 12 can be supercooled sufficiently, and the value range of ts is more than 0 and less than or equal to 10 h.
Further, the Td temperature is preset as the supercooling critical temperature of the food, and when the food in the supercooled state is cooled until the Td temperature reaches the food supercooling critical temperature point, that is, the food cannot be kept in the supercooled state at the Td temperature or below, including the Td temperature, regardless of the control means, the food in the supercooled state starts nucleation at the Td temperature, and the supercooled state of the food is rapidly released in a very short time. The food in the supercooled state is nucleated at the Td temperature and then undergoes a crystal freezing phenomenon, and the temperature of the food is changed such that the temperature rises to the freezing point temperature instantly after the Td temperature is reached, and the freezing point temperature is maintained substantially constant during freezing.
Further, in the embodiment, the surface temperature of the food is monitored and judged in real time, and when △ T is (Tn-Tn-1) >0, the supercooling release operation is executed, so that the method has the advantages that when the food reaches the Td, namely the supercooling critical temperature point, spontaneous supercooling release is immediately carried out, namely, nucleation and crystallization are rapidly carried out.
Furthermore, Td is more than or equal to-10 ℃ at the temperature of 0 ℃, and T1 is more than T2 is more than Td.
During the control process of air cooling 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-TB2And when the pressure exceeds 2, controlling the air supply device not to 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 control of the cooling time ti is implemented through the timing device in each cooling stage, which is beneficial to reducing the temperature difference between the surface and the inside of the cooled object in each cooling stage, increasing the success probability of the overcooling of the cooled object, and also avoiding that the cooled object which has already entered the overcooling state can easily release the overcooling state in advance.
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 the cold air supply door.
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.
S02: supercooling release process: the condenser fan speed is increased by the control means to a condenser fan maximum speed S2. And operating the rotation speed of the condenser fan at a second rotation speed S2 for a time ta, wherein S2> S1, and the compressors are all operated at a first rotation speed M1 in the supercooling release process. 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. The invention increases the cooling capacity of the instant freezing chamber 12 in the supercooling release process by increasing the rotating speed of the condenser fan to the maximum rotating speed, thereby quickly releasing the food from the supercooling state. 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 food thawing agent can better avoid the loss of nutrient substances of food after thawing and better maintain the flavor of the food.
Furthermore, the value range of the first rotating speed S1 of the condenser fan is 1200 rpm-S1-1500 rpm, and the value range of the second rotating speed S2 of the condenser fan is 1600 rpm-S2-1900 rpm.
Furthermore, the value range of the condenser fan in the supercooling release process for the ta time at the second rotating speed S2 is more than or equal to 10h and more than ta and more than 0 h.
S03: and (3) conventional refrigeration preservation process: and (4) restoring the rotating speed of the condenser fan to the rotating speed S1 of the step S01, operating the compressors at the first rotating speed M1 and controlling the instant freezing chamber to be in the normal refrigeration preservation temperature range according to the preset temperature Tc.
Further, the value range of the preset temperature Tc in the conventional refrigeration storage process 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 instantaneous freezing chamber is controlled to open and close by judging the temperature of the instantaneous freezing chamber, so that the instantaneous freezing chamber can be controlled according to the preset temperature Tc and the energy consumption can be reduced, and the economic efficiency of the instantaneous freezing control method is improved.
Example 2:
the embodiment is a further optimized implementation manner of embodiment 1, and details of the embodiment are described with reference to fig. 7:
in this embodiment, the judgment of the time of the supercooling process of the food is added to the judgment of the temperature of the food in the step S01C on the basis of the embodiment 1, and the judgment module of the time of the supercooling process of the food is executed, so that the supercooling state of the food can be forcibly released when the food is supercooled sufficiently in the tn period, the energy consumption of the refrigerator implementing the instant freezing control process can be reduced, and the instant freezing storage of the food can be performed more quickly
This embodiment is the same as the supercooling release process and the normal refrigeration storage process described in embodiment 1, and has the difference that: in the step S01C of the multi-stage temperature reduction and supercooling process, after the step S01B is finished, the controller controls the instant freezing chamber 12 to operate according to the preset Td temperature, monitors the surface temperature of the food in real time through the infrared sensor 35 in the instant freezing functional area in the process that the instant freezing chamber 12 operates according to the preset Td temperature, continuously collects the real-time temperature of the cooled object at the preset time interval delta t, and compares the real-time temperature Tn of the cooled object obtained at the Tn-th time with the temperature Tn-1 of the cooled object monitored before the preset time interval delta t;
if △ T is (Tn-Tn-1) >0, the subcooling process operation is released;
if △ T is (Tn-Tn-1) <0, continuing to judge the Tn time, and continuing to judge whether the detection time Tn is within the range of the maximum threshold ts of the multi-stage cooling and supercooling process time;
if tn < ts, the supercooling release process is not performed, and the instant freezing chamber continues to perform the step S01C, that is, the controller controls the instant freezing chamber 12 to operate at the preset Td temperature.
And if tn is larger than or equal to ts, executing the supercooling release operation.
Further, the maximum time threshold ts of the multi-stage cooling and supercooling process is the time for ensuring that the food in the instant freezing chamber 12 can be supercooled sufficiently, and the value range of ts is more than 0 and less than or equal to 10 h.
The method has the advantages that the monitoring of the internal temperature of the food is a technical difficulty, particularly when the food is placed in a relatively large cooling space, the instant temperature rise of the food cannot cause the obvious change of the monitoring temperature of a temperature sensor, on the other hand, the non-contact temperature measurement can be influenced by the environment, and in order to avoid the problems of overlong supercooling time and overlong supercooling freezing process caused by monitoring errors caused by temperature monitoring, a supercooling forcible release program for time judgment is added, namely, even if △ T (Tn-Tn-1) <0 does not occur, ts is the maximum threshold value of the supercooling time, the supercooling release operation is forcibly carried out as long as Tn is not less than ts.
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 (16)

1. A method for controlling instant freezing and storing comprises a multi-stage cooling and supercooling process, a supercooling relieving process and a conventional refrigerating and storing process, and is characterized in that:
the multi-stage cooling and supercooling process adopts staged cooling;
continuously collecting the real-time temperature Tn of the cooled object at a preset time interval delta t from a preset time t1 after the staged temperature reduction process starts, and comparing the real-time temperature Tn of the cooled object obtained at the Tn-th time with the temperature Tn-1 of the cooled object monitored before the preset time interval delta t;
and if △ T is (Tn-Tn-1) >0, the supercooling release is executed.
2. The instant freezing storage control method according to claim 1, characterized in that:
if △ T is (Tn-Tn-1) <0, continuously judging whether the detection time Tn is greater than or equal to the multi-stage cooling and supercooling process time maximum threshold value ts;
and if tn is larger than or equal to ts, the supercooling removing process operation is carried out.
3. The instant freezing storage control method according to claim 2, characterized in that: if tn < ts, the subcooling process continues.
4. The frozen-in storage control method according to any one of claims 1 to 3, characterized in that: the value range of the preset time interval delta t for collecting the real-time temperature of the cooled object is more than 0 and less than or equal to 2 min.
5. The instant freezing storage control method according to claim 4, wherein: the preset time t1 is set after the 1 st stage of the multi-stage temperature-reducing and supercooling process.
6. The instant freezing storage control method according to claim 5, characterized in that: the maximum threshold value ts of the multi-stage cooling and supercooling process time is the time required by the cooled object to be fully supercooled, and the value range of ts is more than 0 and less than or equal to 10 h.
7. The frozen-in storage control method according to any one of claims 1 to 6, characterized in that: the multi-stage cooling comprises n stages, each stage of the multi-stage cooling process controls an air supply device for implementing air cooling according to the preset temperature Tn of the cooling stage, the n cooling stages are divided into 1 st, … … i and … … th stages, wherein the ith cooling stage represents any 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 more than or equal to 2, all limits on any stage are replaced by the ith stage, namely:
in the ith cooling stage, an air supply device for air cooling the instant freezing chamber (12) is controlled according to the preset temperature Ti; i.e. with TONi＝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。
8. The frozen-in storage control method according to claim 7, characterized in that:
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.
9. The frozen-in storage control method according to claim 7, characterized in that: t isB1The value range of (A) is 0 DEG C<TB1≤2℃，TB2The value range of (A) is 0 DEG C<TB2≤2℃。
10. The instant frozen storage control method according to claim 9, characterized in that:
a 1 st cooling stage exists before the preset time T1, the preset temperature of the 1 st cooling stage is T1, and the compressor is controlled to operate at a second rotating speed M2 in the 1 st cooling stage; and after the 1 st temperature reduction stage is completed, the rotating speed of the compressor is adjusted to be lower than M1 rotating speed of M2, and M2 is larger than M1.
11. The instant frozen storage control method according to claim 10, characterized in that: and in the multi-stage cooling and supercooling process, the condenser fan always keeps the first fan rotating speed S1 to operate, and when the supercooling relieving process is executed, the rotating speed of the condenser fan is controlled to be increased from the first fan rotating speed S1 to the maximum rotating speed to operate, wherein the maximum rotating speed is the second fan rotating speed S2, and the condenser fan operates at the second fan rotating speed S2 for a ta time.
12. The instant frozen storage control method according to claim 11, characterized in that: the condenser fan is maintained operating at fan first speed S1 and the compressor is operated at first speed M1 throughout the conventional refrigeration preservation process.
13. A flash freezing control method according to claim 12, wherein: the temperature of 5 ℃ or more and T1 is more than or equal to 0 ℃ in the first temperature reduction stage of the multi-stage temperature reduction and supercooling process; in the conventional refrigeration storage process, the cooled object is subjected to refrigeration control, so that the cooled object runs at a preset temperature Tc of-7 ℃ to Tc less than 0 ℃.
14. An instant freezing control method as claimed in claims 1-13, wherein: the control method for the conventional storage stage 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.
15. A refrigerator with instant freezing and storing functions is provided with an instant freezing chamber (12), a refrigerating system and a control system, and is characterized in that: the control system controls the cooling device to perform the flash freezing function of the flash freezing chamber using the flash freezing control method of any one of claims 1 to 14.
16. The refrigerator of claim 15, wherein: the control system comprises: the refrigeration system comprises a controller, a temperature sensor, a timer and a condenser fan, wherein the refrigeration system comprises a compressor; and the controller is in control connection with the temperature sensor, the timer and the condenser fan, and the compressor is controlled to rotate at a controlled speed.
CN201911045360.2A 2019-10-30 2019-10-30 Instant freezing storage control method and refrigerator Withdrawn CN110953817A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012042126A (en) * 2010-08-19 2012-03-01 Marushie Machinery Kk Freezer
CN106839581A (en) * 2015-12-07 2017-06-13 青岛海尔智能技术研发有限公司 Refrigerating device and its freezing method
CN108779939A (en) * 2016-03-22 2018-11-09 三菱电机株式会社 Refrigerating plant
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
JP2012042126A (en) * 2010-08-19 2012-03-01 Marushie Machinery Kk Freezer
CN106839581A (en) * 2015-12-07 2017-06-13 青岛海尔智能技术研发有限公司 Refrigerating device and its freezing method
CN108779939A (en) * 2016-03-22 2018-11-09 三菱电机株式会社 Refrigerating plant
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