CN110701863A - Instant freezing chamber control method and refrigerator - Google Patents
Instant freezing chamber control method and refrigerator Download PDFInfo
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- CN110701863A CN110701863A CN201911046684.8A CN201911046684A CN110701863A CN 110701863 A CN110701863 A CN 110701863A CN 201911046684 A CN201911046684 A CN 201911046684A CN 110701863 A CN110701863 A CN 110701863A
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- 238000004781 supercooling Methods 0.000 claims abstract description 75
- 238000005057 refrigeration Methods 0.000 claims abstract description 29
- 238000003860 storage Methods 0.000 claims abstract description 21
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Classifications
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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
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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
- 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
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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
- F25D2600/00—Control issues
- F25D2600/02—Timing
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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
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
Abstract
The invention relates to a control method of an instant freezing chamber and a refrigerator. The instant freezing chamber control method comprises a supercooling and cooling process, a supercooling removing process and a conventional refrigeration and storage process. In the supercooling and cooling process, the object to be cooled is cooled in stages, and the cooling in each stage is realized by cooling control on the object to be cooled, so that the object to be cooled can smoothly enter a supercooling state. 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, the rotating speed of a fan of the condenser is increased to relieve the supercooling state of the cooled object, so that the cooled object is instantly frozen (instant freezing for short), and the frozen cooled object is stored at the conventional refrigeration storage temperature for a long time.
Description
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 present invention provides a method for controlling an instant freezing chamber and a refrigeration system.
The invention relates to a control method of an instant freezing chamber and a refrigerator. The instant freezing chamber control method comprises a supercooling and cooling process, a supercooling removing process and a conventional refrigeration and storage process. In the supercooling and cooling process, the object to be cooled is cooled in stages, and the cooling in each stage is realized by cooling control on the object to be cooled, so that the object to be cooled can smoothly enter a supercooling state. 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, the rotating speed of a fan of the condenser is increased to relieve the supercooling state of the cooled object, so that the cooled object is instantly frozen (instant freezing for short), and the frozen cooled object is stored at the conventional refrigeration storage temperature for a long time.
Specifically, the method comprises the following steps:
the invention provides a control method of a flash freezing chamber, which comprises a supercooling cooling process, a supercooling relieving process and a conventional refrigeration preservation process, and is characterized in that:
the supercooling and cooling process carries out staged cooling on the cooled object;
the supercooling and cooling process comprises n cooling stages, wherein each cooling stage of the n cooling stages implements cooling control on a cooled object, and in the cooling control, an air supply device implementing air cooling is controlled according to a preset temperature Tn of the cooling stage; performing a flash freezing preservation process on the object to be cooled in a flash freezing chamber by performing a cooling control on the flash freezing chamber;
n cooling stages exist in the supercooling 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, the air supply device is arranged in the instant freezing chamber;
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 controlled to control the cold air supply door.
Preferably, in the 1 st stage of the supercooling and cooling stage, the rotating speed of the compressor is operated at the maximum rotating speed M2, and after the cooling in the 1 st stage is finished, the rotating speed of the compressor is operated at the first rotating speed M1, wherein M1 is less than M2.
Preferably, in the process of performing the sub-cooling process to cool the object to be cooled in stages, the rotation speed of the condenser fan is operated according to the first rotation speed S1.
Preferably, the temperature of 5 ℃ is not less than T1 and is more than 0 ℃ in the 1 st stage of the supercooling cooling process.
Preferably, Tn is more than or equal to-15 ℃ and less than or equal to Tn.T +1 is more than or equal to T2<0 ℃ and i is more than or equal to 2 and less than or equal to n in the process of supercooling and cooling.
Preferably, the value range of the time ti for performing cooling control on the cooled object in the ith stage in the supercooling and cooling process is 0h < ti ≦ 8 h.
Preferably, the supercooling releasing means in the supercooling releasing process increases the rotation speed of the condenser fan to a second rotation speed S2, and the second rotation speed S2 is the maximum rotation speed of the condenser fan.
Preferably, the operating time of the condenser fan in the supercooling release process is kept at the second rotating speed S2 and is ta,10h is more than or equal to ta and is more than 0h, and the rotating speed of the condenser fan is recovered to the first rotating speed S1 when the operating time meets ta.
Preferably, 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 <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 present invention also provides a control system comprising: the controller is in control connection with the compressor rotating speed adjusting device, the temperature sensor and the timer, the temperature adjusting device adjusts the temperature of the instant freezing chamber by opening and closing a cold air supply door of the air supply device, and the control system is used for executing any control method of the invention.
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 12, and the instant freezing chamber adopts the instant freezing chamber control method to carry out instant freezing storage on cooled objects.
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 refrigerator control system according to an embodiment of the present invention;
FIG. 6 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; 11-a refrigerating chamber; 12-instant freezing chamber; 13-a freezing chamber;
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 basic inventive idea is as follows:
the invention provides a control method of an instant freezing chamber and a refrigerator, which ensure that a cooled object in the instant freezing chamber enters a supercooling state through multi-stage cooling in a supercooling cooling process. In the supercooling relieving process, the supply of cold energy is increased by increasing the rotating speed of a condenser fan, so that the object to be cooled in the supercooling state in the instant freezing chamber is relieved from the supercooling state to realize instant freezing, and uniform and fine ice crystals are formed. And finally, the temperature of the instant freezing chamber 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 embodiments of the invention is provided in conjunction with the accompanying figures 1-6:
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: 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 → condenser → anti-condensation tube → dry filter → capillary tube → refrigeration evaporator → return air tube component → compressor.
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.
The cooled material in this embodiment is generally meat, fruit and vegetable food, and especially fresh meat food. 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.
The present embodiment shown in fig. 5 further provides the above-mentioned control system, including: 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 and the condenser fan 37, the frequency conversion plate 35 is used for achieving rotation speed adjusting control over the compressor 23 included in the refrigeration system, and the control system is used for executing the instant freezing chamber control method of the embodiment.
Further, the rotating speed of the compressor in the refrigeration system can be adjusted through a control system, and the rotating speed of the compressor can be adjusted through the frequency conversion plate or any rotating speed adjusting device capable of adjusting the rotating speed of the compressor.
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.
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.
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.
S01A: and controlling the instant freezing chamber to operate at a preset temperature T1 for T1 time by the control device, and controlling the compressor to rotate at a second rotating speed M2 during T1 time. The second compressor speed is the maximum compressor speed.
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 enabled to be more quickly stabilized in the temperature vicinity of T1, and the early preparation time for the object to be cooled to enter 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 kept in a small range temperature interval containing the temperature T1, the overall temperature of the instantaneous freezing chamber is convenient to uniformly reduce in the subsequent multi-stage temperature reduction and supercooling process, the temperature difference between the surface and the inside of the cooled object placed in the instantaneous freezing chamber is smaller, and the cooled object is more favorable for smoothly entering a 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. The user can turn on the flash chamber control method of executing the flash chamber 12 through a flash function button provided in the display 32 on the refrigerator.
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 food needs to be cooled at a slower cooling rate and at a lower cooling capacity, so that the cooled food can successfully enter the overcooling state and is not easy to be released from the overcooling state, and therefore, the effect can be realized by reducing the rotating speed of the compressor.
The supercooling and cooling process comprises n cooling stages, wherein each cooling stage of the n cooling stages implements cooling control on a cooled object, and in the cooling control, an air supply device implementing air cooling is controlled according to a preset temperature Tn of the cooling stage;
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.
Further, the value range of the time ti for performing cooling control on the cooled object in the ith stage in the 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 timer and the controller in a single cooling stage, which is beneficial to reducing the temperature difference between the surface and the inside of the cooled object in the single cooling stage, increasing the success probability of the cooled object entering the supercooling state, and also avoiding that the cooled object which has entered the supercooling state can easily release the supercooling state in advance.
Further, TB1And TB2For a known parameter, 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.
Furthermore, Tn is more than or equal to-15 ℃ and less than or equal to Tn +1 is more than or equal to T2<0 ℃ and i is more than or equal to 2 and less than or equal to n in the S01B step in the multi-stage cooling and supercooling process.
S02: supercooling release process: the control device increases the rotation speed of the condenser fan, the rotation speed of the condenser fan is enabled to operate for a time ta at a second rotation speed S2, S2> S1, and the compressor operates 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 present embodiment achieves an increase in the amount of cooling supplied to the instant freezing chamber during the supercooling release process by increasing the rotation speed of the condenser fan, thereby allowing the food to be quickly released from the supercooled 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 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 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 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 process is that T 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;TB2the 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 12 is controlled by judging the temperature of the instantaneous freezing chamber 12, so that the functions of controlling the instantaneous freezing chamber according to the preset temperature Tc and reducing energy consumption can be realized at the same time, and the economic efficiency of the instantaneous freezing chamber control method is improved.
As shown in fig. 6, fig. 6 is a graph showing 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.
In summary, the present invention is optimized by a more rational control method of the whole supercooling process, and even if the passage time of the temperature zone is long, the frozen ice crystals do not grow and fine ice crystals can be formed. A novel freezing method is to form small ice crystals by freezing a temperature zone including the vicinity of the maximum ice crystal temperature zone, and to obtain good-quality frozen ice. Further, if the supercooled state is released, freezing starts, and the food is completely frozen after passing through the phase change state in which the temperature does not change, the supercooled state causes ice crystals not to grow even if the food stays in the maximum ice crystal formation zone for a long time in the subsequent freezing process, and causes other than the ice crystals that deteriorate the quality of the food can be avoided, and high-quality freezing can be performed.
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 (14)
1. A control method of an instant freezing chamber comprises a supercooling cooling process, a supercooling relieving process and a conventional refrigeration preservation process, and is characterized in that:
performing a flash freezing preservation process on the object to be cooled in a flash freezing chamber by performing a cooling control on the flash freezing chamber;
the supercooling and cooling process carries out staged cooling on the cooled object;
the supercooling and cooling process comprises n cooling stages, wherein each cooling stage of the n cooling stages implements cooling control on a cooled object, and in the cooling control, an air supply device implementing air cooling is controlled according to a preset temperature Tn of the cooling stage;
n cooling stages exist in the supercooling 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.
2. The instant freezer control method of claim 1, wherein: and the air supply device is controlled by a cooling air door.
3. The instant freezer control method of claim 2, wherein: in the 1 st stage of the supercooling and cooling stage, the rotating speed of the compressor runs at the maximum rotating speed M2, and after the cooling in the 1 st stage is finished, the rotating speed of the compressor runs at the first rotating speed M1, wherein M1 is less than M2.
4. A method of controlling an instant freezer as claimed in claim 3 wherein: in the process of carrying out staged temperature reduction on the cooled object in the supercooling and temperature reduction process, the rotating speed of the fan of the condenser is operated according to the first rotating speed S1.
5. The instant freezer control method of claim 4, wherein: in the 1 st stage of the supercooling and cooling process, the temperature is more than or equal to 5 ℃ and more than or equal to T1 and more than 0 ℃.
6. The instant freezer control method of any one of claims 1-5, wherein: tn is more than or equal to-15 ℃ and less than or equal to-1. T2 is less than or equal to 0 ℃, i is more than or equal to 2 and less than or equal to n, and i is more than or equal to 2 and less than or equal to n in the supercooling and cooling process.
7. The instant freezer control method of claim 6, wherein: the value range of the time ti for carrying out cooling control on the cooled object in the ith stage in the supercooling and cooling process is 0h < ti is less than or equal to 8 h.
8. The instant freezer control method of claim 7, wherein: in the supercooling removing process, the supercooling removing means is to increase the rotating speed of the condenser fan to a second rotating speed S2, and the second rotating speed S2 is the maximum rotating speed of the condenser fan.
9. The instant freezer control method of claim 8, wherein: the operating time of the condenser fan keeps the second rotating speed S2 at ta in the supercooling release process, the operating time is more than or equal to 10h and more than 0h, and the rotating speed of the condenser fan is recovered to the first rotating speed S1 when the operating time meets ta.
10. The instant freezer control method of claim 9, wherein: 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 ℃.
11. The instant freezer control method of claim 10, 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.
12. A control system, comprising: controller, compressor speed adjusting device, temperature regulation apparatus, temperature sensor, time-recorder, wherein the controller realizes control connection, its characterized in that with compressor speed adjusting device, temperature regulation apparatus, temperature sensor, time-recorder: the temperature adjusting device adjusts the temperature of the instant freezing chamber by opening and closing a cold air supply door of an air supply device, and the control system is used for executing the control method of any one of claims 1 to 11.
13. A refrigerator, characterized in that: use of a control method according to any one of claims 1 to 11, or with a control system according to claim 12.
14. The refrigerator according to claim 13, wherein: the refrigerator comprises an instant freezing chamber (12), and the instant freezing chamber (12) adopts the instant freezing chamber control method of claims 1 to 11.
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Application publication date: 20200117 |