CN110953825A - Control method for instant freezing storage of refrigerator and refrigerator - Google Patents
Control method for instant freezing storage of refrigerator and refrigerator Download PDFInfo
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- CN110953825A CN110953825A CN201911046404.3A CN201911046404A CN110953825A CN 110953825 A CN110953825 A CN 110953825A CN 201911046404 A CN201911046404 A CN 201911046404A CN 110953825 A CN110953825 A CN 110953825A
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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
- 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
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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
- F25D2400/30—Quick freezing
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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 provides a control method for instant freezing storage of a refrigerator, which is characterized in that cold air generated by a refrigerating system is adjusted to supply cold to a stored object in response to a received instant freezing storage instruction, and the storage of the stored object by adopting an overcooling storage mode comprises an overcooling preparation period: the method comprises the steps of firstly increasing the rotating speed of a compressor in a refrigeration system, storing stored objects at a preset preparation temperature, and entering a supercooling cooling period when the temperature of the stored objects reaches the preset preparation temperature; and (3) supercooling and cooling period: recovering the rotating speed of the compressor, and performing a multi-stage cooling process on the stored object by using a preset temperature gradient; supercooling release period: reducing the refrigerant flow of a capillary tube in the refrigeration system and increasing the rotating speed of a condenser fan in the refrigeration system within a preset relieving time so as to relieve supercooling; and (3) in a conventional refrigeration period: and recovering the refrigerant flow of the capillary tube and the rotating speed of the condenser fan, and storing the stored substance in a conventional storage mode. In addition, a refrigerator with instant freezing storage function is also disclosed.
Description
Technical Field
The invention relates to the field of refrigerators, in particular to a control method for instant freezing storage of a refrigerator and the refrigerator.
Background
The invention relates to the technical field of refrigerator preservation, in particular to a control method capable of realizing instant freezing storage.
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. There are also some techniques proposed to release supercooling by increasing the wind speed or the air volume in a supercooling preservation method such as CN20070052223.0 "refrigerator and freezing preservation method".
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 poor, 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 solution to the above problems, specifically:
the invention provides a control method for instant freezing storage of a refrigerator, which is characterized in that cold air generated by a refrigerating system is adjusted to supply cold to stored objects in response to a received instant freezing storage instruction, and the storage of the stored objects by adopting an overcooling storage mode comprises the following steps of
A supercooling preparation period: firstly, increasing the rotating speed of a compressor in a refrigeration system, storing a stored object at a preset preparation temperature, and entering a supercooling cooling period when the temperature of the stored object reaches the preset preparation temperature, wherein the preset preparation temperature is in a range of 0-5 ℃ and does not include 0 ℃;
and (3) supercooling and cooling period: the rotating speed of the compressor is recovered, the stored object is subjected to a multi-stage cooling process by a preset temperature gradient,
the multi-stage cooling process comprises an m stage, and an nth preset cooling time is operated at an nth preset cooling temperature in an nth stage, wherein the nth preset cooling temperature is lower than an nth-1 preset cooling temperature, the nth preset cooling temperature is lower than the preset preparation temperature, m is a positive integer greater than or equal to 2, and n is a positive integer less than or equal to m;
supercooling release period: after the multi-stage cooling process is finished, reducing the refrigerant flow of a capillary tube in the refrigeration system and increasing the rotating speed of a condenser fan in the refrigeration system within the preset relieving time so as to relieve supercooling;
and (3) in a conventional refrigeration period: after the supercooling release period is finished, the refrigerant flow of the capillary tube and the rotating speed of the condenser fan are recovered, and the stored object is stored in a conventional storage mode.
Preferably, the rotation speed S1 of the condenser fan before the speed raising meets 1200rpm & lt S1 & lt 1500rpm, and the rotation speed S2 after the speed raising meets 1600rpm & lt S2 & lt 1900 rpm.
Preferably, the nth preset cooling time range is 0 h-1 h.
Preferably, the set time length of the supercooling preparation period is not more than 10h, and the supercooling cooling period is entered after the set time length is reached.
Preferably, the temperature interval of the multi-stage cooling process is-6 ℃ to 0 ℃ and does not include 0 ℃.
Preferably, the temperature of the conventional storage manner is-7 ℃ to 0 ℃ and does not include 0 ℃.
Preferably, the nth preset cooling time range is 0 h-1 h; the temperature interval of the multi-stage cooling process is-6-0 ℃ and does not include 0 ℃; the temperature of the conventional storage mode is-7 ℃ to 0 ℃ and does not include 0 ℃.
The second aspect of the invention discloses a control method for instant freezing storage of a refrigerator, which is characterized in that cold air generated by a refrigerating system is adjusted to supply cold to stored objects in response to a received instant freezing storage instruction, and the storage of the stored objects by adopting an overcooling storage mode comprises the following steps
A supercooling preparation period: firstly, increasing the rotating speed of a compressor in a refrigeration system, storing the stored object at a preset preparation temperature within a preset preparation time, and entering a supercooling cooling period after the preset preparation time is finished, wherein the preset preparation temperature is in a range of 0-5 ℃ and does not include 0 ℃;
and (3) supercooling and cooling period: the rotating speed of the compressor is recovered, the stored object is subjected to a multi-stage cooling process by a preset temperature gradient,
the multi-stage cooling process comprises an m stage, and an nth preset cooling time is operated at an nth preset cooling temperature in an nth stage, wherein the nth preset cooling temperature is lower than an nth-1 preset cooling temperature, the nth preset cooling temperature is lower than the preset preparation temperature, m is a positive integer greater than or equal to 2, and n is a positive integer less than or equal to m;
supercooling release period: after the multi-stage cooling process is finished, reducing the refrigerant flow of a capillary tube in the refrigeration system and increasing the rotating speed of a condenser fan in the refrigeration system within the preset relieving time so as to relieve supercooling;
and (3) in a conventional refrigeration period: after the supercooling release period is finished, the refrigerant flow of the capillary tube and the rotating speed of the condenser fan are recovered, and the stored object is stored in a conventional storage mode.
A third aspect of the present invention discloses a refrigerator having a flash freezing storage function, the refrigerator including
And the control unit is used for storing by adopting any one of the control methods.
The fourth aspect of the present invention discloses a refrigerator having a flash freezing storage function, the refrigerator comprising
A storage chamber for storing the stored object;
the refrigerating system is used for responding to the control of the control unit and cooling the stored object in the storage chamber, and comprises a capillary tube and a condenser fan, wherein the capillary tube is arranged in a refrigerant flow path of the refrigerating system and used for conveying refrigerant, and the condenser fan is used for responding to the control of the control unit and dissipating the heat of the refrigerant sent by the compressor;
the control unit is used for controlling the cold air generated by the refrigerating system to supply cold to the stored object,
wherein during the subcooling preparation period: the control unit controls the refrigerating system to increase the rotating speed of the compressor so as to supply cold to the stored object at a preset preparation temperature; in the supercooling and cooling period: the control unit controls the refrigerating system to recover the rotating speed of the compressor, and performs a multi-stage cooling process on the stored object by using a preset temperature gradient; in the supercooling release period: the control unit controls the refrigerating system to reduce the refrigerant flow of the capillary tube within the preset release time and increase the rotating speed of the fan of the condenser so as to release the supercooling; during the normal refrigeration period: the control unit controls the refrigerant flow of the recovery capillary tube of the refrigeration system and the rotating speed of the condenser fan, and stores the stored object in a conventional storage mode.
Preferably, the multi-stage cooling process includes an m stage, and the nth preset cooling time is operated at an nth preset cooling temperature in an nth stage, wherein the nth preset cooling temperature is lower than an n-1 th preset cooling temperature, the nth preset cooling temperature is lower than the preset preparation temperature, m is a positive integer greater than or equal to 2, and n is a positive integer less than or equal to m; the nth preset cooling time ranges from 0h to 1 h.
Preferably, the refrigerator further comprises
A compressor for varying a speed in response to control of the control unit to adjust cooling of the stored object;
the electric switching valve is used for responding to a switching instruction of the control unit and switching the capillary tube to realize throttling control on the refrigerant in the capillary tube;
a temperature monitoring unit for monitoring the temperature of the stored object;
and the timer is used for recording the cooling time of the nth stage in the multi-stage cooling process.
Preferably, the preset preparation temperature ranges from 0 ℃ to 5 ℃ and does not include 0 ℃; the temperature interval of the multi-stage cooling process is-6-0 ℃ and does not include 0 ℃; the temperature of the conventional storage mode is-7 ℃ to 0 ℃ and does not include 0 ℃.
Preferably, the control unit is further configured to control the refrigeration system to enter the supercooling cooling period after the set duration of the supercooling preparation period is reached, wherein the set duration of the supercooling preparation period does not exceed 10 h.
The invention has the following beneficial effects: (1) the control method can realize the supercooling storage of the meat, reduce the juice loss compared with the traditional freezing technology and keep the nutrition of the frozen meat to the maximum extent. (2) The control method of the invention removes the overcooling state by reducing the flow of the capillary and simultaneously increasing the rotating speed of the fan of the condenser so as to reduce the temperature of the condenser, thereby avoiding the air drying problem of food caused by increasing the air quantity or the air speed. (3) The invention can achieve good cutting effect by controlling the stored meat, and has good user experience.
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 flow chart of a control method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a control portion of a refrigerator according to an embodiment of the present invention;
FIG. 3 is a schematic view of a refrigeration system for a refrigerator in accordance with an embodiment of the present invention;
fig. 4 is a flow diagram of a refrigeration system according to an embodiment of the present invention.
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 existing technology for supercooling preservation has the following disadvantages: the supercooling is released in advance due to uneven temperature reduction in the supercooling process; the supercooling relieving effect is poor, and the wind speed or the wind volume is increased; the supercooling depth is shallow, and the supercooling state cannot be well entered
The invention provides a control method capable of realizing instant freezing storage, which divides the storage into a supercooling preparation period, a supercooling cooling period, a supercooling release period and a conventional refrigeration period. Firstly, the refrigeration efficiency is improved in the supercooling preparation period, the temperature of the stored objects is unified and is maintained to be more than 0 ℃ and close to 0 ℃, and the temperature is preferably selected to be within the range of 0-5 ℃ and not including 0 ℃. The supercooling and cooling period recovers the initial refrigeration working parameters, for example, if the compressor in the refrigeration system is accelerated in the previous stage, the compressor is recovered to the rotating speed before the acceleration in the stage, and then the stage cooling is performed in steps to ensure that the food enters the supercooling state. In the supercooling release period, the invention provides a method for realizing high-efficiency supercooling release, which can reduce the temperature of the stored object storage area in a short time, such as switching the flow of a capillary tube for throttling and combining with increasing the rotating speed of a condenser fan for rapidly reducing the temperature. And finally, in a conventional refrigeration period, storing in a conventional storage mode, such as restoring the flow of the refrigerant of the capillary tube and setting the temperature to a certain value (excluding 0 ℃) between-7 ℃ and 0 ℃ and the like.
The invention realizes the overcooling state by cooling in stages and optimizes the overcooling state relief, avoids the problem that the overcooling is relieved in advance due to uneven temperature reduction in the overcooling process, has good overcooling relief effect, has deeper overcooling depth and can well enter the overcooling state.
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 opening degree of a freezing air door and the rotating speed of a freezing fan can be kept unchanged in the storage process.
Example 1
As shown in fig. 1-4, a control method for instant freezing storage of a refrigerator, which adjusts cold air generated by a refrigeration system to supply cold to stored objects in response to a received instant freezing storage command, and stores the stored objects in an overcooling storage mode comprises four periods: a supercooling preparation period, a supercooling cooling period, a supercooling release period and a conventional refrigeration period.
For the subcooling preparation period: in the equipment normally operating with initial working parameters, the rotating speed of a compressor in a refrigeration system is firstly increased, the stored object is stored at a preset preparation temperature, when the temperature of the stored object reaches the preset preparation temperature, a supercooling cooling period is started, and at the moment, the range of the preset preparation temperature can adopt the temperature interval and can be further narrowed, for example, the temperature is set to be 1-3 ℃. The rotating speed of the compressor is increased to uniformly reduce or increase the temperature of the stored objects to the preset preparation temperature, so that the overall temperature is uniformly reduced later, and the internal and external temperatures of the food can be uniformly reduced.
When the time of the preparation period is required, and the temperature of the stored object does not reach the preset preparation temperature and the stored object must enter the supercooling cooling period, the user can adopt another supercooling preparation stage mode to carry out instant freezing storage on the stored object, for example, in the supercooling preparation period, the stored object does not adopt a mode of reaching the preset preparation temperature to enter the supercooling cooling period, the time length of the supercooling preparation period is independently set, and the stored object enters the supercooling cooling period after the set time length is reached. Preferably, the set time period of the supercooling preparation period does not exceed 10 h.
Furthermore, the storage mode based on the set time length of the supercooling preparation period can also be combined with the storage mode of entering the supercooling cooling period after the temperature of the stored object reaches the preset preparation temperature. At the moment, if the temperature of the stored object reaches the preset preparation temperature, the next period is directly started; when the set length of the supercooling preparation period is completed when the preset preparation temperature is not reached, the next period is entered.
In order to improve the efficiency of the preparation process in the supercooling preparation period, in a preferred embodiment, the rotational speed of the compressor is adjusted to the maximum to achieve rapid and effective temperature reduction or temperature rise so that the stored material satisfies the preparation condition as soon as possible. Furthermore, in other modes, the cooling or heating preparation can be performed by increasing the rotation speed of the condenser fan.
When entering the supercooling cooling period: and recovering the rotating speed of the compressor, and performing a multi-stage temperature reduction process on the stored object by using a preset temperature gradient. The multi-stage cooling process comprises an m stage, and an nth preset cooling time is operated at an nth preset cooling temperature in an nth stage, wherein the nth preset cooling temperature is lower than an nth-1 preset cooling temperature, the nth preset cooling temperature is lower than the preset preparation temperature, m is a positive integer larger than or equal to 2, and n is a positive integer smaller than or equal to m. Preferably, the preset cooling time range for each stage may be set at 0h to 1 h. The preset temperature should be lower than the preset preparation temperature, preferably, the temperature interval of the multi-stage temperature reduction process is-6 ℃ to 0 ℃ and does not include 0 ℃, wherein part of the interval can be used as the upper limit and the lower limit of the multi-stage temperature reduction to be used as the temperature interval for realizing the multi-stage temperature reduction.
The stored objects are cooled evenly by the temperature set in the multi-stage gradual cooling process, so that the food is ensured to enter a supercooling state, and uniform freezing is realized after supercooling is relieved.
For the supercooling release period: after the multi-stage cooling process is completed, the overcooled state of the stored object is released. Preferably, the flow rate of the refrigerant of the capillary tube in the refrigeration system is reduced within the preset release time while the rotation speed of the fan of the condenser is increased in combination, so that the supercooling is released. Since the temperature difference of the stored material needs to be changed in a short time in the state of releasing the supercooling, other alternative embodiments are not limited to the method of only adopting the capillary throttling and increasing the rotating speed of the condenser fan, and the rotating speed of the compressor can be increased in an auxiliary manner. The preset release time is not more than 10h, and the process ensures that the stored object in the overcooled state has as much water as possible to form ice crystals instantly and pass through the maximum ice crystal generation belt rapidly.
Finally, a conventional refrigeration cycle is entered after the above process is completed. During the period, the refrigerant flow of the recovery capillary tube and the rotating speed of the condenser fan can be adopted to store the stored substance in a conventional storage mode. In the present invention, the normal storage period is a period in which the stored material is stored at a predetermined temperature, that is, the stored material is kept in a frozen state at the predetermined temperature. Preferably, the temperature of the conventional storage method is set to-7 ℃ to 0 ℃ excluding 0 ℃, and the storage state of the stored material is kept stable.
For the capillary tube in the mode, the preset value V1 of the flow during the initial operation satisfies 4.5L/min-V1-5L/min, and the flow can be reduced to V2 for throttling when switching is carried out, wherein 2L/min-V2-3L/min; when the condenser fan in the refrigeration system is adjusted, the rotating speed S1 before speed increase (namely the rotating speed kept in the conventional refrigeration period before the supercooling preparation period is ended) meets the condition that the rotating speed is more than or equal to 1200rpm and less than or equal to S1 and less than or equal to 1500rpm, and the rotating speed S2 after speed increase (which can be adjusted to the maximum rotating speed) meets the condition that the rotating speed is more than or equal to 1600rpm and less than or equal to S2 and less than; when the rotating speed M of the compressor is adjusted, the rotating speed M is respectively equal to or less than 1200rpm and equal to or less than M1 and equal to or less than 1400rpm before and after the speed is increased, and the rotating speed M is equal to or less than 3800rpm and equal to or less than M2 and equal to or less than 4500 rpm.
Example 2
The embodiment specifically discloses a refrigerator with instant freezing storage function, which comprises a control unit and corresponding basic hardware equipment matched with the control unit to realize instant freezing storage. The control unit in the refrigerator is stored by adopting any one of the control methods.
Example 3
Another more specific refrigerator having a flash freezing storage function is disclosed in this embodiment as shown in fig. 2 to 4, in which a storage chamber, a refrigeration system and a control unit are included. The storage chamber is used for providing a space environment for storing stored objects. Delivering a refrigerant through a capillary tube disposed in a refrigerant flow path of a refrigeration system; a condenser fan provided in the refrigeration system radiates heat of the refrigerant sent from the compressor in response to the control of the control unit. The refrigerating system responds to the control of the control unit and supplies cold to the stored objects in the storage chamber; the control unit is used as a control center of the refrigerator and controls cold air generated by the refrigerating system to supply cold to the stored objects. Further, during the subcooling preparation period: the control unit controls the refrigerating system to increase the rotating speed of the compressor so as to supply cold to the stored object at a preset preparation temperature; in the supercooling and cooling period: the control unit can control the refrigerating system to recover the rotating speed of the compressor, and a multi-stage cooling process is carried out on the stored object by a preset temperature gradient; in the supercooling release period: the control unit also controls the refrigerating system to reduce the refrigerant flow of a capillary in the refrigerating system and increase the rotating speed of a fan of the condenser within the preset relief time; during the normal refrigeration period: the control unit controls the refrigerant flow of the recovery capillary tube of the refrigeration system and the rotating speed of the condenser fan, and stores the stored object in a conventional storage mode.
Further, the multi-stage cooling process comprises m stages, wherein m is a positive integer greater than or equal to 2. Specifically, the nth preset cooling temperature is operated at the nth preset cooling time in the nth stage, the nth preset cooling temperature is lower than the nth-1 preset cooling temperature, the nth preset cooling temperature is required to be lower than the preset preparation temperature, the nth preset cooling time in the nth stage is within a range of 0 h-1 h, and n is a positive integer not greater than m.
The refrigerating system in the refrigerator further includes a compressor capable of changing speed in response to the control of the control unit to adjust cooling of the stored material; the electric switching valve responds to a switching instruction of the control unit and switches the capillary tube to realize throttling control on the refrigerant in the capillary tube; a temperature monitoring unit for monitoring the temperature of the stored object; and a timer for recording the cooling time of the nth stage in the multi-stage cooling process. Preferably, the compressor is increased to the maximum speed during speed increasing, and a frequency conversion plate is arranged at the compressor and adopts frequency conversion regulation. Preferably, the temperature monitoring unit adopts non-contact monitoring, such as an infrared sensor and the like; the temperature measurement can be carried out by independently adopting a contact temperature measurement mode or combining with an infrared sensor, the accuracy of temperature monitoring data is improved at the moment, and the average value of multipoint measurement can be taken.
For the temperature of each stage of the refrigerator in each period, preferably, the preset preparation temperature is in the range of 0-5 ℃ and does not include 0 ℃; the temperature interval of the multi-stage cooling process is-6 ℃ to 0 ℃ and does not include 0 ℃; the temperature of the conventional storage mode is-7 ℃ to 0 ℃ and does not include 0 ℃.
In addition, after the control unit in the refrigerator is further optimized, the refrigeration system is controlled to enter the supercooling cooling period after the set time of the supercooling preparation period is reached, and the mode of judging whether to enter the supercooling cooler according to the set time and the monitoring temperature can be independently set or matched with the mode. When both are used as the judgment conditions, the next period will be entered when either one of them reaches the judgment condition. More preferably, the set time period of the supercooling preparation period does not exceed 10 h.
In any of the above embodiments 1 to 3, for the temperature control at each stage, the following procedure may be adopted: after the user selects the instant freezing storage function on the display according to the requirement, the control unit senses the temperature of the storage area or the stored object through the temperature sensor in the temperature monitoring unit.
During the supercooling preparation period, the operation is carried out according to a preset temperature T0, and when the compressor is started or stopped, a starting temperature point T is seton0＝T0+TB1/2, shutdown temperature Point Toff0＝Ton0-TB2And/2, setting the running time to be T0, running the compressor at M2, running the capillary at V1 flow, and running the condenser fan at S1, wherein T0 is more than or equal to 1 ℃ and less than or equal to 5 ℃. T0 is more than or equal to 0 and less than or equal to 10 hours, T is more than 0 DEG CB1,TB2≤2℃，TB1Indicating the floating temperature of a starting point of an instantaneous freezing chamber in the starting process of the compressor; t isB2The step is that the temperature of the compartment is uniformly reduced to or increased to be above 0 ℃, so that the overall temperature is uniformly reduced later, and the temperature inside and outside the food can be uniformly reduced.
The control unit is used for cooling the compartment in stages in the supercooling cooling period, specifically, the control unit is used for cooling in stages in the supercooling cooling period, and the method specifically comprises the following steps:
the supercooling and cooling period is divided into m stages to be executed successively: after the period, the operation is carried out according to the preset temperature Tn, the rotating speed of the compressor is operated at M1, the capillary tube is operated at V1 flow, the rotating speed of the fan of the condenser is S1, the operation time is set to Tn, wherein when the compressor is started and stopped, the starting temperature point T is setonn＝Tn+TB1/2, shutdown temperature Point Toffn＝Tonn-TB2And 2, starting the timer, and entering the next period after the running time tn is finished. Wherein tn is more than 0 and less than or equal to 1 h; tn is more than or equal to minus 6 ℃ and less than 0 ℃, Tn is more than or equal to Tn-1, TB1Indicating the floating temperature of a starting point of an instantaneous freezing chamber in the starting process of the compressor; t isB2The temperature difference between the start and stop of the instant freezing chamber is defined, n is less than or equal to m and n is a positive number.
As shown in fig. 3, in the supercooling release stage: the flow rate of the capillary tube 2 is V2, and V2 is less than V1 by switching to the capillary tube 2 through an electric switching valve; the compressor speed is M1, the condenser fan speed is S2, and the maximum cold air is given to the stored object, and the methodPhase running time is set to tRelieve fromThe timer starts to time, and when the running time reaches the next period, the time is more than or equal to t within 10hRelieve fromThe ice crystal formation time is more than 0h, so that ice crystals can be formed instantly by as much water as possible in the food in the supercooled state, and the ice crystals can rapidly pass through the largest ice crystal formation belt, wherein V1 is more than or equal to 4.5L/min and less than or equal to 5L/min, and V2 is more than or equal to 2L/min and less than or equal to 3L/min; the rotating speed S1 of the condenser fan before the speed rise is larger than or equal to 1200rpm and smaller than or equal to S1 and smaller than or equal to 1500rpm, and the rotating speed S2 after the speed rise (which can be adjusted to the maximum rotating speed) is larger than or equal to 1600rpm and smaller than or equal to S2 and smaller than or equal to 1900 rpm.
In the conventional refrigeration preservation stage: the capillary tube 1 is switched to be operated according to the flow V1 by an electric switching valve, the rotating speed of a compressor is operated at M1, the rotating speed of a fan of a condenser is S1, and the chamber in the conventional preservation stage is controlled according to the temperature T. Further, in order to keep the frozen meat preserved in good condition, it is usually selected to have a temperature of-7 ℃ or more and T < 0 ℃.
In the mode, the rotating speed M of the running compressor respectively meets the conditions that the rotating speed M is 1200rpm is less than or equal to M1 and less than or equal to 1400rpm before and after the speed is increased, and the rotating speed M is less than or equal to 3800rpm and less than or equal to M2 and less than or equal to 4500 rpm. In another temperature adjustment method, when the temperature at each time is adjusted and maintained at a value close to a certain temperature, at least one of opening and closing a damper of a refrigerator compartment, opening and closing a freezing fan, and the like may be used in addition to the start and stop of the compressor.
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 for instant freezing storage of refrigerator features that the cold air generated by refrigerating system is regulated in response to the received instant freezing storage instruction to cool the stored substance, and the storage of said substance by overcooling storage mode includes
A supercooling preparation period: firstly, increasing the rotating speed of a compressor in a refrigeration system, storing a stored object at a preset preparation temperature, and entering a supercooling cooling period when the temperature of the stored object reaches the preset preparation temperature, wherein the preset preparation temperature is in a range of 0-5 ℃ and does not include 0 ℃;
and (3) supercooling and cooling period: the rotating speed of the compressor is recovered, the stored object is subjected to a multi-stage cooling process by a preset temperature gradient,
the multi-stage cooling process comprises an m stage, and an nth preset cooling time is operated at an nth preset cooling temperature in an nth stage, wherein the nth preset cooling temperature is lower than an nth-1 preset cooling temperature, the nth preset cooling temperature is lower than the preset preparation temperature, m is a positive integer greater than or equal to 2, and n is a positive integer less than or equal to m;
supercooling release period: after the multi-stage cooling process is finished, reducing the refrigerant flow of a capillary tube in the refrigeration system and increasing the rotating speed of a condenser fan in the refrigeration system within the preset relieving time so as to relieve supercooling;
and (3) in a conventional refrigeration period: after the supercooling release period is finished, the refrigerant flow of the capillary tube and the rotating speed of the condenser fan are recovered, and the stored object is stored in a conventional storage mode.
2. The control method for instant freeze storage of a refrigerator as claimed in claim 1, wherein the condenser fan rotation speed S1 before the speed up S1 is 1200rpm ≦ 1500rpm, and the rotation speed S2 after the speed up S2 is 1600rpm ≦ 1900 rpm.
3. The control method for instant freeze storage of a refrigerator according to claim 1, wherein the nth preset cool down time range is 0h to 1 h.
4. The control method for instant freeze storage of a refrigerator according to claim 3, wherein the set time period of the supercooling preparation period is not more than 10h, and the supercooling cooling period is entered after the set time period is reached.
5. The control method for instant freeze storage of a refrigerator according to claim 4, wherein the temperature interval of the multi-stage cooling process is-6 ℃ to 0 ℃ excluding 0 ℃.
6. The control method for instant freeze storage of a refrigerator according to claim 5, wherein the temperature of the normal storage manner is-7 ℃ to 0 ℃ excluding 0 ℃.
7. The control method for instant freeze storage of a refrigerator according to claim 1, wherein the nth preset cooling time range is 0h to 1 h; the temperature interval of the multi-stage cooling process is-6-0 ℃ and does not include 0 ℃; the temperature of the conventional storage mode is-7 ℃ to 0 ℃ and does not include 0 ℃.
8. A control method for instant freezing storage of refrigerator features that the cold air generated by refrigerating system is regulated in response to the received instant freezing storage instruction to cool the stored substance, and the storage of said substance by overcooling storage mode includes
A supercooling preparation period: firstly, increasing the rotating speed of a compressor in a refrigeration system, storing the stored object at a preset preparation temperature within a preset preparation time, and entering a supercooling cooling period after the preset preparation time is finished, wherein the preset preparation temperature is in a range of 0-5 ℃ and does not include 0 ℃;
and (3) supercooling and cooling period: the rotating speed of the compressor is recovered, the stored object is subjected to a multi-stage cooling process by a preset temperature gradient,
the multi-stage cooling process comprises an m stage, and an nth preset cooling time is operated at an nth preset cooling temperature in an nth stage, wherein the nth preset cooling temperature is lower than an nth-1 preset cooling temperature, the nth preset cooling temperature is lower than the preset preparation temperature, m is a positive integer greater than or equal to 2, and n is a positive integer less than or equal to m;
supercooling release period: after the multi-stage cooling process is finished, reducing the refrigerant flow of a capillary tube in the refrigeration system and increasing the rotating speed of a condenser fan in the refrigeration system within the preset relieving time so as to relieve supercooling;
and (3) in a conventional refrigeration period: after the supercooling release period is finished, the refrigerant flow of the capillary tube and the rotating speed of the condenser fan are recovered, and the stored object is stored in a conventional storage mode.
9. A refrigerator with instant freezing storage function is characterized in that the refrigerator comprises
A control unit, which is stored by using the control method of any one of the preceding claims 1-8.
10. A refrigerator with instant freezing storage function is characterized in that the refrigerator comprises
A storage chamber for storing the stored object;
the refrigerating system is used for responding to the control of the control unit and cooling the stored object in the storage chamber, and comprises a capillary tube and a condenser fan, wherein the capillary tube is arranged in a refrigerant flow path of the refrigerating system and used for conveying refrigerant, and the condenser fan is used for responding to the control of the control unit and dissipating the heat of the refrigerant sent by the compressor;
the control unit is used for controlling the cold air generated by the refrigerating system to supply cold to the stored object,
wherein during the subcooling preparation period: the control unit controls the refrigerating system to increase the rotating speed of the compressor so as to supply cold to the stored object at a preset preparation temperature; in the supercooling and cooling period: the control unit controls the refrigerating system to recover the rotating speed of the compressor, and performs a multi-stage cooling process on the stored object by using a preset temperature gradient; in the supercooling release period: the control unit controls the refrigerating system to reduce the refrigerant flow of the capillary tube within the preset release time and increase the rotating speed of the fan of the condenser so as to release the supercooling; during the normal refrigeration period: the control unit controls the refrigerant flow of the recovery capillary tube of the refrigeration system and the rotating speed of the condenser fan, and stores the stored object in a conventional storage mode.
11. The refrigerator of claim 10, wherein the multi-stage cooling process includes m stages, and the n stage is operated at an n preset cooling temperature for an n preset cooling time, wherein the n preset cooling temperature is lower than an n-1 preset cooling temperature, the n preset cooling temperature is lower than the preset preparation temperature, m is a positive integer greater than or equal to 2, and n is a positive integer less than or equal to m; the nth preset cooling time ranges from 0h to 1 h.
12. The refrigerator of claim 11, further comprising a flash storing function
A compressor for varying a speed in response to control of the control unit to adjust cooling of the stored object;
the electric switching valve is used for responding to a switching instruction of the control unit and switching the capillary tube to realize throttling control on the refrigerant in the capillary tube;
a temperature monitoring unit for monitoring the temperature of the stored object;
and the timer is used for recording the cooling time of the nth stage in the multi-stage cooling process.
13. The refrigerator having a flash storing function according to claim 10, wherein the preset preparation temperature is in a range of 0 ℃ to 5 ℃ excluding 0 ℃; the temperature interval of the multi-stage cooling process is-6-0 ℃ and does not include 0 ℃; the temperature of the conventional storage mode is-7 ℃ to 0 ℃ and does not include 0 ℃.
14. The refrigerator with instant freezing storage function according to any one of claims 10 to 13, wherein the control unit is further configured to control the refrigeration system to enter the supercooling cooling period after a set time period of the supercooling preparation period is reached, wherein the set time period of the supercooling preparation period is not more than 10 h.
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Application publication date: 20200403 |