CN110906653A - Control method for supercooling non-freezing storage and refrigerator - Google Patents
Control method for supercooling non-freezing storage and refrigerator Download PDFInfo
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- CN110906653A CN110906653A CN201910960509.3A CN201910960509A CN110906653A CN 110906653 A CN110906653 A CN 110906653A CN 201910960509 A CN201910960509 A CN 201910960509A CN 110906653 A CN110906653 A CN 110906653A
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- 238000007710 freezing Methods 0.000 title claims abstract description 58
- 230000008014 freezing Effects 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000004781 supercooling Methods 0.000 title claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 202
- 238000010438 heat treatment Methods 0.000 claims abstract description 56
- 230000009467 reduction Effects 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims description 22
- 238000011946 reduction process Methods 0.000 claims description 9
- 238000005057 refrigeration Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000000796 flavoring agent Substances 0.000 abstract description 5
- 235000019634 flavors Nutrition 0.000 abstract description 5
- 230000000737 periodic effect Effects 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 8
- 235000013372 meat Nutrition 0.000 description 8
- 235000013399 edible fruits Nutrition 0.000 description 6
- 235000013311 vegetables Nutrition 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 2
- 235000016709 nutrition Nutrition 0.000 description 2
- 230000035764 nutrition Effects 0.000 description 2
- 235000014102 seafood Nutrition 0.000 description 2
- 235000014214 soft drink Nutrition 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention relates to a control method for supercooling non-freezing storage and a refrigerator, wherein periodic temperature rise and temperature fall control is carried out on a cooling chamber, wherein the temperature fall stage is carried out by stages step by step to be below a freezing point, a cooled object is enabled to stably enter a supercooling state, needle-shaped ice crystals generated by the frozen object are prevented from damaging a cell structure, the flavor of the cooled object is further prevented from being damaged during unfreezing, a heating device is started in the temperature rise stage, the temperature of the storage environment of the cooled object is continuously raised to be equal to or higher than the freezing point by adopting a continuous temperature rise mode, and the heating device is closed after the temperature rise is finished. By continuously circulating the temperature rise and the temperature reduction, the cooling object can not be frozen near the freezing point, and the fresh-keeping period of the cooling object is prolonged.
Description
Technical Field
The invention relates to a refrigerator control method and a refrigerator, in particular to a control method for supercooling non-freezing storage and a refrigerator.
Background
With the rapid development of the air-cooled refrigerator and the improvement of the fresh-keeping requirement of consumers on the cooling object, the multifunctional refrigerator is rapidly developed, and the control requirement on the storage temperature of the cooling object in the refrigerator is more and more strict.
In the prior art, a method for storing and controlling cooling objects for short-term storage and fresh keeping of fruits, vegetables, meat and the like mainly comprises the following steps: the single temperature control mode and the high-temperature and low-temperature alternative control mode are fixed, so that the cooling object is more and more hard to freeze due to the fact that the single low-temperature control mode and the high-temperature and low-temperature alternative control mode are fixed, the internal structure of the cooling object is damaged, nutrition is lost when unfreezing, the quality and the taste of the cooling object are obviously poor, the flavor of the cooling object cannot be well maintained, and the requirements of users cannot be met.
Disclosure of Invention
The invention can effectively solve the problems of long thawing time and reduced quality of the cooling object after the cooling object is frozen by implementing periodic cooling and heating control on the storage environment temperature of the cooling object, presetting a plurality of cooling targets for staged cooling in the cooling stage, presetting a single heating target for continuous heating in the heating stage, and alternately heating and cooling.
Specifically, the method comprises the following steps:
the invention provides a supercooling non-freezing storage method, which is provided with a program alternately implemented by a staged temperature reduction process and a continuous temperature rise process in the supercooling non-freezing storage process, wherein the program comprises the following steps:
s1: the staged temperature reduction process is carried out, so that the cooled object is gradually reduced to a second temperature T2 lower than the freezing point T0 of the cooled object according to a preset temperature reduction target and a preset temperature reduction duration;
s2: and a continuous heating process, wherein the heating device is started to continuously heat the cooled object to a first temperature T1 which is equal to or higher than the freezing point T0 of the cooled object, and the heating device is closed after the heating is finished.
Wherein, T1 is more than T2, the temperature range of T1 is 0-10 ℃, and the temperature range of T2 is-10-0 ℃.
The invention also provides a control method of the refrigerator, the refrigerator is provided with a cooling chamber with the supercooling non-freezing storage function, and during the supercooling non-freezing storage period, the following supercooling non-freezing control is alternately carried out on the cooling chamber:
s1: the staged cooling process is carried out, so that the cooling chamber is cooled to a second temperature T2 lower than the freezing point T0 of the cooled object stage by stage according to a preset cooling target and a preset cooling duration;
s2: a continuous heating process, wherein the heating device is started to continuously heat the cooling chamber to a first temperature T1 which is equal to or higher than the freezing point T0 of the cooled object, and the heating device is closed after the heating is finished;
wherein, T1 is more than T2, the temperature range of T1 is 0-10 ℃, and the temperature range of T2 is-10-0 ℃;
the temperature difference between T1 and T2 is 0-20 ℃.
Preferably, the cooling procedure S1 includes:
s10: presetting the total operation time t of the cooling program;
s11, presetting a first cooling target temperature T1 ', enabling the cooling chamber to adjust and cool with the target of T1', and setting the duration of the step S11 as first cooling preset time T1;
thus, the temperature reduction is continuously carried out in stages, and when the temperature reduction reaches the S1n stage:
s1n, presetting a second cooling target temperature Tn ', and enabling the cooling chamber to adjust and cool by taking Tn' as a target, wherein the duration of the step S1n is the nth cooling preset time Tn;
and when the total time length of t1+ ·+ tn reaches the total time length t of the operation of the preset temperature reduction program, stopping the temperature reduction stage, and entering a temperature rise stage, wherein n > < 2, which is a natural number.
Preferably, the temperature increasing routine S2: and starting the heating device, presetting a first temperature T1, enabling the cooling chamber to adjust the temperature rise by taking T1 as a target, detecting the real-time temperature of the cooling chamber, closing the heating device when the real-time temperature of the cooling chamber is more than or equal to T1, stopping running the temperature rise program and starting executing the temperature reduction program.
Preferably, n preset cooling times in the cooling process meet the following requirements: t1+ -. + tn > 0h, n preset cooling targets in the cooling process meet: tn ' is more than T2 ' and less than T1 ' and less than 0 ℃ at the temperature of minus 10 ℃.
Preferably, the rotation speed range of the compressor in the temperature reduction procedure S1 is 1200rpm to 4500rpm, the initial rotation speed range of the compressor is 1200rpm to 2000rpm, and the rotation speed difference range of the compressor between each temperature reduction step is 200rpm to 500 rpm.
Preferably, the temperature reduction speed in the staged temperature reduction process is 0.3-10 ℃/h, and the temperature rise speed in the temperature rise process is 0.5-10 ℃/h.
Preferably, the heating means heats the cooling compartment in a continuous temperature rise manner using a heater in the form of a resistor.
The invention also provides a control unit, and the supercooling non-freezing storage method and the refrigerator control method provided by the invention are adopted.
Specifically, a control unit includes: controller, temperature regulation apparatus, temperature sensor, time-recorder, heating device, its characterized in that: the controller is used for controlling other parts of the control unit and the refrigeration system; the temperature adjusting device is used for adjusting the cooling chamber to operate according to a preset temperature; the temperature sensor is used for detecting the temperature of the cooling chamber in real time; the timer is used for setting and monitoring the time length; and a heating device for heating the cooling chamber in the temperature rise process to raise the temperature of the cooling chamber.
In addition, the invention also provides a cooling chamber with a supercooling and non-freezing function, and the control unit or the control method provided by the invention is adopted.
In addition, the invention also provides a refrigerator which adopts the control unit or the control method or the cooling chamber provided by the invention.
Preferably, the refrigerator further includes a refrigerating system for generating cool air to be supplied to the cooling compartment.
The invention can prolong the fresh-keeping time of the cooling objects such as fruits, vegetables and the like, keep the meat in a fresh, tender, supercooled and unfrozen state when being stored, and avoid damaging the internal structure of the cooling object to cause nutrition loss and further influence the flavor of the cooling object.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely some embodiments of the present disclosure, and other drawings may be derived from those drawings by those of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic diagram of the control logic of embodiment 2 of the present invention;
FIG. 2 is a schematic diagram of the control logic of embodiment 3 of the present invention;
FIG. 3 is a schematic diagram of the electrical principle in embodiments 2 and 3 of the present invention;
fig. 4 is a schematic structural diagram of a refrigeration system according to embodiments 2 and 3 of the present invention;
FIG. 5 is a schematic view of embodiment 1 of the refrigerator according to the present invention;
FIG. 6 is a schematic view of a cooling chamber in examples 1,2 and 3 of the present invention;
FIG. 7 is a graph showing the temperature change of the cooling chamber in example 2 of the present invention;
FIG. 8 is a graph showing the temperature change of the cooling chamber in example 3 of the present invention;
FIG. 9 is a temperature change curve of a cooling object in a cooling chamber according to embodiment 2 of the present invention;
FIG. 10 is a graph showing the temperature change of a cooling object in a cooling chamber according to embodiment 3 of the present invention;
in the drawings:
1-a refrigerating chamber; 2-a cooling chamber; 3-freezing chamber; 4-a temperature sensor;
5-a refrigeration system; 51-a compressor; 52-a condenser; 53-anti-condensation tube; 54-a dry filter; 55-a refrigerated evaporator; 56-a return air duct assembly;
6-heating device.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus, a repetitive description thereof will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the disclosure.
The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
It is to be understood that, as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It is to be understood by those skilled in the art that the drawings are merely schematic representations of exemplary embodiments, and that the blocks or processes shown in the drawings are not necessarily required to practice the present disclosure and are, therefore, not intended to limit the scope of the present disclosure.
The invention aims to provide a supercooling non-freezing storage method and a refrigerator, which can be used for supercooling and non-freezing storage of a cooling object, so that the cooling object enters a supercooling state, further, the temperature of the cooling object is not frozen even if being reduced to a freezing point or below the freezing point, and the problems that the cooling object is harder and harder to freeze in a single low-temperature control mode and a long-time low-temperature control mode in a high-temperature and low-temperature alternative control mode, further, the fresh-keeping time is short, the unfreezing time is long, and the flavor of the cooling object is reduced after unfreezing are solved.
For further explanation, the present invention takes an air-cooled refrigerator as an example, and provides the following specific examples. The air-cooled refrigerator uses cold air as a carrier, and the rotating speed of a freezing fan can be kept unchanged in the storage process.
Example 1:
as shown in fig. 5, the present embodiment provides a supercooling non-freezing storage refrigerator, including:
the cooling chamber 2 performs supercooling freeze-free preservation of the cooling target placed therein.
The refrigerating system 5 is used for producing cold air to refrigerate a cooling object in the refrigerator, and specifically comprises: a compressor 51, a condenser 52, a condensation preventing pipe 53, a drying filter 54, a freezing evaporator 55 and a return air pipe assembly 56, and the refrigeration system 5 of the present embodiment is shown in fig. 4.
The control unit includes: controller, temperature regulation apparatus, temperature sensor 4, time-recorder, heating device 6, its characterized in that: a controller for controlling other components of the control unit and the refrigeration system 5; a temperature adjusting device for adjusting the cooling chamber 2 to operate at a preset temperature; the temperature sensor 4 is used for detecting the temperature of the cooling chamber 2 in real time; the timer is used for setting and monitoring the time length; the heating device 6 heats the cooling chamber 2 to raise the temperature thereof in the temperature raising process.
Preferably, the refrigerator is further provided with an infrared temperature sensor for detecting a temperature of a surface of the cooling object.
Preferably, the heating device 6 heats the cooling chamber 2 by a resistance-type heater in a continuous temperature rise manner, so that the freezing probability of the cooling object is reduced, and further, the cell tissue freezing damage caused by the generation of frozen ice crystals in the cooling object is reduced.
Preferably, the heating device 6 can be arranged on the inner wall or the bottom of the periphery of the cooling chamber 2, and in the embodiment, the heating device 6 is preferably arranged on the bottom of the cooling chamber 2.
Preferably, the cooling is implemented by changing the rotation speed of the compressor 51 in the refrigeration system 5, and more preferably, the rotation speed of the compressor ranges from 1200rpm to 4500rpm, the initial rotation speed of the compressor is set to range from 1200rpm to 2000rpm, the initial rotation speed of the compressor in this embodiment is preferably 1200rpm, and then the difference value of the rotation speed of the compressor between each previous step and each subsequent step of cooling ranges from 200rp m to 500rpm, and the difference value of the rotation speed of the compressor in this embodiment is 500rpm, so as to implement the gradual decrease of the temperature of the cooling chamber 21, and enable the cooling object to stably enter the supercooling state.
Specifically, after the user places the cooling target in the cooling chamber 2, the cooling target is supercooled and stored without freezing. The control unit realizes the cooling and heating in the cooling chamber 2 by controlling the temperature adjusting device and the compressor 51 in the refrigeration system 5, wherein, during the cooling: controlling the air door corresponding to the cooling chamber 2 in the temperature adjusting device to be opened, controlling the compressor 51 to be opened and rotated, continuously conveying cold air to the cooling chamber 2, and increasing the cold energy in the cooling chamber 2 to reduce the temperature of the cooling chamber; when the temperature is increased: and controlling the heating device 6 to be started, controlling the compressor 51 to stop rotating, controlling the air door corresponding to the cooling chamber 2 in the temperature regulating device to be closed, and further stopping conveying cold air to the cooling chamber 2, so that the temperature in the cooling chamber 2 is increased due to the heating of the heating device 6, and closing the heating device 6 after the temperature rising process is finished.
According to the embodiment, the control unit is used for realizing the periodical control of temperature rise and temperature reduction of the cooling chamber 2, complex operation is not needed, the cooling object can not be frozen near the freezing point, and the fresh-keeping time of the perishable cooling object is prolonged.
Example 2:
the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings 1: a supercooling non-freezing storage control method comprises the following steps:
s1: the staged cooling process is carried out, so that the cooling chamber is cooled to a second temperature T2 lower than the freezing point T0 of the cooled object stage by stage according to a preset cooling target and a preset cooling duration;
s2: and a continuous heating process of starting the heating device 6, continuously heating the cooling chamber to a first temperature T1 which is equal to or higher than the freezing point T0 of the cooled object, and closing the heating device 6 after the heating process is finished.
Wherein, T1 is more than T2, the temperature range of T1 is 0-10 ℃, and the temperature range of T2 is-10-0 ℃;
the temperature difference between T1 and T2 is 0-20 ℃.
Preferably, if only one type of cooling object is stored in the cooling chamber 2, the freezing point according to which the second temperature T2 is set is the freezing point of the type of cooling object; if a plurality of types of cooling objects are stored in the cooling chamber 2, the freezing point according to which the second temperature T2 is set is the freezing point of the cooling object whose temperature is the lowest.
Specifically, after the user puts the cooling object into the cooling chamber 2 of the refrigerator, the infrared temperature sensor in the cooling chamber 2 detects the surface temperature Ts of the cooling object, and if the surface temperature Ts of the cooling object is detected to be higher than the second temperature T2, the refrigerator control unit controls the cooling chamber 2 to cool first, wherein the cooling program S1 includes:
s10: presetting the total operation time of the cooling program as t;
s11, presetting a first cooling target temperature T1 'to enable the cooling chamber 2 to be adjusted and cooled by taking T1' as a target, and presetting the duration of the step S11 as a first cooling preset time T1;
s12: presetting a second cooling target temperature T2 'to enable the cooling chamber 2 to be adjusted and cooled by taking T2' as a target, wherein the duration of the step S12 is preset second cooling preset time T2;
thus, the temperature reduction is continuously carried out in stages, and when the temperature reduction reaches the S1n stage:
s1n, presetting a second cooling target temperature Tn 'to enable the cooling chamber 2 to adjust and cool by taking the Tn' as a target, and presetting the duration of the step S1n as nth cooling preset time Tn;
and when the total time length of t1+ t2+. + tn reaches the preset total time length t for operating the temperature reduction program, stopping operating the temperature reduction program, and starting to execute the temperature increase program.
Preferably, n preset cooling times in the cooling process meet the following requirements: t1+ t2+. + tn > 0h, n preset cooling targets in the cooling process meet: tn ' is more than T2 ' and less than T1 ' and less than 0 ℃ at the temperature of minus 10 ℃.
Preferably, the target temperature for lowering the temperature in each of the steps S11 to S1n is preset in the control program.
Preferably, the specific value of the second temperature T2 is set according to the type of the object to be cooled, and more preferably, if the object to be cooled in the cooling chamber 2 is a fruit or vegetable, T2 is set to-1 ℃ to 0 ℃; if the cooling object placed in the cooling chamber 2 is soft drink, setting T2 to-2-0 ℃; if the object to be cooled in the cooling chamber 2 is meat, T2 is set to-3-0 deg.C; if the object to be cooled in the cooling chamber 2 is seafood, T2 is set to-5 ℃ to 0 ℃.
Further preferably, in this embodiment, the object to be cooled is meat, so T2 is preferably set to-3 ℃ in this embodiment, which is effective to prevent the object to be cooled from freezing.
Preferably, in each of the steps S11 to S1n, a timer is used to count the step maintaining time, and when the accumulated time length of the timer in each step reaches the preset time length of the step, the step is stopped and the next step is executed.
Preferably, in order to avoid freezing due to continuous cold absorption of the cooling object, after each of the steps S11 to S1n is completed, the total duration t1+ t2+ ·+ tn is determined, and when the total duration t1+ t2+ ·+ tn reaches the preset total duration t of the cooling program operation, the cooling program is stopped from the current step meeting the determination condition, and the heating program S2 is started to be executed.
Preferably, the preset total operation time t of the cooling program can be adjusted according to the type, weight and volume of the cooling object.
Preferably, in the temperature reduction process S1, the rotation speed difference of the compressor is controlled to be in the range of 200rpm to 500rpm, and in the embodiment, the rotation speed difference is preferably 500rpm, so that the temperature of the cooling chamber 2 is gradually reduced.
Adopt cascaded cooling step by step in this implementation to help the cooling object temperature keep even inside and outside, the slow cooling of cooling object just can stably get into the state of supercooling, makes the cooling object temperature even be less than freezing point temperature T0 and can not produce freezing, extension cooling object fresh-keeping time.
When the cooling chamber 2 is warmed, the temperature raising routine S2 is executed, and the temperature raising routine S2: presetting a first temperature T1, starting the heating device 6, enabling the cooling chamber 2 to adjust and heat with a target of T1, and detecting the real-time temperature of the cooling chamber 2 by using the temperature sensor 4, so that when the real-time temperature of the cooling chamber 2 is more than or equal to T1, the heating device 6 is closed, the operation of the heating program S2 is stopped, the execution of the cooling program S1 is returned, and then the periodic cycle of cooling and heating is started.
Preferably, the specific value of the first temperature T1 is set according to the type of the object to be cooled, and more preferably, if the object to be cooled in the cooling chamber 2 is a fruit or vegetable, T1 is set to 0 to 5 ℃; if the cooling object placed in the cooling chamber 2 is soft drink, setting T1 to 0-2 ℃; if the object to be cooled in the cooling chamber 2 is meat, T1 is set to 0-0.5 deg.C; if the object to be cooled in the cooling chamber 2 is seafood, T1 is set to 0 ℃ to-1 ℃.
In this embodiment, it is further preferable that T1 be 0 ℃, which is effective for preventing the meat to be cooled from being rotten due to bacteria.
Preferably, the temperature reduction speed in the staged temperature reduction process is 0.3-10 ℃/h, and the temperature rise speed in the temperature rise process is 0.5-10 ℃/h.
The temperature change of the cooling chamber 2 of the present embodiment is shown in fig. 7, and the temperature change curve of the cooling object in the cooling chamber 2 is shown in fig. 9.
The control method provided by the embodiment can realize the supercooling and unfreezing storage of the cooling objects of the fruits, the vegetables and the meat, and can also realize the supercooling and unfreezing storage of the cooling objects with other freezing points by changing the numerical values of T1, T2 and T.
This embodiment is through carrying out the cooling control of stage formula to cooling chamber 2, can make the supercooling temperature point lower, effectively restrain the inside various chemical reactions of cooling object, extension cooling object fresh-keeping term, it makes 2 temperature of cooling chamber rise fast to open heating device 6 during the intensification, reduce the cooling object probability of freezing, periodic cycle control cooling object is cooled down and is heated up and avoided fixed single temperature control mode and high, the cooling object that the low temperature leads to in the low temperature alternative control mode for a long time freezes the problem, control is simple easily operated, realize that the cooling object does not freeze near freezing the knot, can effectively solve the fresh-keeping problem of short-term storage of cooling object.
Example 3:
as shown in fig. 2, in this embodiment, another control method for supercooling non-freezing storage is provided, after a user puts a cooling object into a cooling chamber 2 of a refrigerator, an infrared temperature sensor in the cooling chamber 2 detects a surface temperature Ts of the cooling object, and if it is detected that the surface temperature Ts of the cooling object is equal to or lower than a second temperature T2, a refrigerator control unit controls the cooling chamber 2 to first warm up, compared with embodiment 2, in this embodiment, a warming program is executed first, then a cooling program is executed, and then a control cycle of warming up and cooling is entered, the rest is the same as embodiment 2, and details are not described herein. The temperature change of the cooling chamber of the present embodiment is shown in fig. 8, and the temperature change curve of the cooling object in the cooling chamber 2 is shown in fig. 10.
In conclusion, the invention carries out staged temperature reduction on the cooling chamber of the refrigerator, can reduce the supercooling point, prolong the fresh-keeping period of the cooling object, start the heating device 5 in the temperature-increasing process to reduce the freezing probability of the cooling object, and the periodic cycle of temperature increase and temperature reduction can keep the cooling object not to be frozen near the freezing point, thereby avoiding the problems of nutrient loss, quality reduction, poor flavor and the like of the cooling object during unfreezing caused by freezing. The invention does not need complex control, is simple to realize, and can effectively meet the short-term storage and fresh-keeping requirements of consumers on cooled objects such as fruits, vegetables, meat and the like.
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 (10)
1. A supercooling non-freezing storage method is characterized in that a program which is alternatively implemented in a staged temperature reduction process and a continuous temperature rise process is arranged in the supercooling non-freezing storage process, wherein:
s1: the staged temperature reduction process is carried out, so that the cooled object is cooled to a second temperature T2 lower than the freezing point T0 of the cooled object stage by stage according to a preset temperature reduction target and a preset temperature reduction duration in each stage;
s2: a continuous heating process of starting the heating device to continuously heat the cooled object to a first temperature T1 which is equal to or higher than the freezing point T0 of the cooled object, and closing the heating device after the heating is finished;
wherein, T1 is more than T2, the temperature range of T1 is 0-10 ℃, and the temperature range of T2 is-10-0 ℃.
2. A control method for a refrigerator having a cooling chamber with a supercooling non-freezing storage function, characterized in that during the supercooling non-freezing storage period, the following supercooling non-freezing control is alternately performed for the cooling chamber:
s1: in the staged temperature reduction process, the cooling chamber is gradually reduced to a second temperature T2 lower than the freezing point T0 of the cooled object according to a preset temperature reduction target and a preset temperature reduction duration;
s2: a continuous heating process, wherein the heating device is started to continuously heat the cooling chamber to a first temperature T1 which is equal to or higher than the freezing point T0 of the cooled object, and the heating device is closed after the heating is finished;
wherein, T1 is more than T2, the temperature range of T1 is 0-10 ℃, and the temperature range of T2 is-10-0 ℃;
the temperature difference between T1 and T2 is 0-20 ℃.
3. The method according to any one of claims 1 to 2, wherein the cooling procedure S1 includes:
s10: presetting the total operation time t of the cooling program;
s11, presetting a first cooling target temperature T1 ', enabling the cooling chamber to adjust and cool with the target of T1', and setting the duration of the step S11 as first cooling preset time T1;
thus, the temperature reduction is continuously carried out in stages, and when the temperature reduction reaches the S1n stage:
s1n, presetting a second cooling target temperature Tn ', and enabling the cooling chamber to adjust and cool by taking Tn' as a target, wherein the duration of the step S1n is the nth cooling preset time Tn;
and when the total time length of t1+. + tn reaches the total time length t of the preset temperature reduction program, stopping running the temperature reduction program, and starting executing the temperature increase program, wherein n > is 2 and is a natural number.
4. The method according to any one of claims 1 to 3, wherein the temperature raising procedure S2: and starting the heating device, presetting a first temperature T1, enabling the cooling chamber to adjust the temperature rise by taking T1 as a target, detecting the real-time temperature of the cooling chamber, closing the heating device when the real-time temperature of the cooling chamber is more than or equal to T1, stopping running the temperature rise program and starting executing the temperature reduction program.
5. The method according to any one of claims 1 to 4, wherein n preset cooling times during the cooling process satisfy: t1+ t2+. + tn > 0h, n preset cooling targets in the cooling process meet: tn ' is more than T2 ' and less than T1 ' and less than 0 ℃ at the temperature of minus 10 ℃.
6. The method according to any one of claims 1 to 3, wherein the temperature reduction rate in the stepwise temperature reduction process is 0.3 ℃/h to 10 ℃/h, and the temperature increase rate in the temperature increase process is 0.5 ℃/h to 10 ℃/h.
7. A method as claimed in claim 1,2 or 4, characterized in that the heating means heat the cooling compartment in a continuously increasing manner by means of a heater in the form of an electrical resistance.
8. A control unit, characterized by: the control unit realizes the control method of any one of claims 2 to 7.
9. A control unit as claimed in claim 8, comprising: controller, temperature regulation apparatus, temperature sensor, time-recorder, heating device, its characterized in that: the controller is used for controlling other parts of the control unit and the refrigeration system; the temperature adjusting device is used for adjusting the cooling chamber to operate according to a preset temperature; the temperature sensor is used for detecting the temperature of the cooling chamber in real time; the timer is used for setting and monitoring the time length; and a heating device for heating the cooling chamber in the temperature rise process to raise the temperature of the cooling chamber.
10. A refrigerator provided with a cooling chamber having a supercooling non-freezing function, characterized in that: the refrigerator is provided with the control unit of any one of claims 8 and 9 or adopts the control method of any one of claims 2 to 7.
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| CN201910960509.3A CN110906653A (en) | 2019-10-10 | 2019-10-10 | Control method for supercooling non-freezing storage and refrigerator |
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| CN201910960509.3A CN110906653A (en) | 2019-10-10 | 2019-10-10 | Control method for supercooling non-freezing storage and refrigerator |
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| CN112393502A (en) * | 2020-11-25 | 2021-02-23 | 珠海格力电器股份有限公司 | Food freezing prevention storage method and refrigerator |
| CN117433243A (en) * | 2023-12-19 | 2024-01-23 | 珠海格力电器股份有限公司 | Temperature control method and device for target compartment and electronic equipment |
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