CN114688798A - Freezing control method of refrigerator and refrigerator - Google Patents
Freezing control method of refrigerator and refrigerator Download PDFInfo
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- CN114688798A CN114688798A CN202011638006.3A CN202011638006A CN114688798A CN 114688798 A CN114688798 A CN 114688798A CN 202011638006 A CN202011638006 A CN 202011638006A CN 114688798 A CN114688798 A CN 114688798A
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- freezing
- control method
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- 238000007710 freezing Methods 0.000 title claims abstract description 80
- 230000008014 freezing Effects 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000008859 change Effects 0.000 claims abstract description 18
- 238000005057 refrigeration Methods 0.000 claims description 49
- 238000007664 blowing Methods 0.000 claims description 2
- 235000013305 food Nutrition 0.000 abstract description 26
- 239000000463 material Substances 0.000 abstract description 18
- 238000001816 cooling Methods 0.000 description 17
- 239000013078 crystal Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 239000000696 magnetic material Substances 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
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- 230000015572 biosynthetic process Effects 0.000 description 2
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- 230000007774 longterm Effects 0.000 description 2
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- 230000009471 action Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
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- 238000001514 detection method Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
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- 238000004781 supercooling Methods 0.000 description 1
Images
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
- 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
- F25D25/00—Charging, supporting, and discharging the articles to be cooled
- F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
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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
- F25D29/005—Mounting of control 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
- F25D2500/00—Problems to be solved
- F25D2500/06—Stock management
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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 provides a freezing control method of a refrigerator and the refrigerator. Wherein the freezing storing compartment of refrigerator is indoor to be provided with the storing box, and the storing box outside is provided with at least a set of solenoid to freezing control method includes: detecting the opening and closing state of the storage box; after an opening and closing event that the storage box is opened and then closed is determined, obtaining the internal temperature change before the storage box is opened and after the storage box is closed; if the amplitude of the internal temperature change is larger than a first set threshold value, starting to refrigerate the storage box and electrifying the electromagnetic coil so as to generate a magnetic field in the storage box by using the electromagnetic coil; and stopping electrifying the electromagnetic coil after the internal temperature of the storage box is lower than a second set threshold value. The scheme of the invention improves the quality of frozen stored food and meets the storage quality requirement of users on precious food materials.
Description
Technical Field
The invention relates to a refrigerating and freezing storage device, in particular to a freezing control method of a refrigerator and the refrigerator.
Background
The requirements of users for various functions of the refrigerator are not limited to prolonging the preservation time, and the preservation effect of the stored goods is more and more emphasized. For food materials to be frozen such as meat, fish and shrimp, the problems of poor taste and dark color caused by juice loss after freezing often occur.
In order to improve the quality of frozen articles, more improvements have been made in the prior art, such as increasing the freezing speed of food by quick freezing or bringing food into an overcooled state, which requires increasing the refrigerating capacity of the refrigerator and also leads to increased energy consumption of the refrigerator. Therefore, the technical problem to be solved urgently by refrigerator researchers is to realize more efficient improvement of the quality of frozen stored goods.
Theoretical studies have found that the magnetic field has a greater effect on ice crystal formation during freezing. The field of refrigerators actively explores the introduction of magnetic fields into the freezing preservation, however, the effect of magnetic field assisted freezing is not satisfactory when the magnetic field assisted freezing is actually applied in the refrigerator.
Disclosure of Invention
The invention aims to provide a freezing control method of a refrigerator and the refrigerator, which can effectively improve the quality of frozen articles.
A further object of the invention is to enable a reduction in the energy consumption of the refrigerator.
Particularly, the present invention provides a freezing control method of a refrigerator. Wherein the freezing storing compartment of refrigerator is indoor to be provided with the storing box, and the storing box outside is provided with at least a set of solenoid to freezing control method includes: detecting the opening and closing state of the storage box; after an opening and closing event that the storage box is opened and then closed is determined, obtaining the internal temperature change of the storage box before and after the storage box is opened; if the amplitude of the internal temperature change is larger than a first set threshold value, starting to refrigerate the storage box and electrifying the electromagnetic coil so as to generate a magnetic field in the storage box by using the electromagnetic coil; and stopping electrifying the electromagnetic coil after the internal temperature of the storage box is lower than a second set threshold value.
Optionally, after the step of starting to refrigerate the storage box and electrifying the electromagnetic coil, the method further comprises the following steps: detecting a temperature at the electromagnetic coil; and after the temperature at the electromagnetic coil exceeds a third set threshold value, stopping electrifying the electromagnetic coil so as to avoid the influence of the electromagnetic coil on refrigeration.
Optionally, after the step of starting to refrigerate the storage box and electrifying the electromagnetic coil, the method further comprises the following steps: detecting a temperature at the electromagnetic coil; and stopping electrifying the electromagnetic coil after the temperature difference between the electromagnetic coil and the internal temperature of the storage box is greater than a fourth set threshold value.
Optionally, the step of refrigerating the storage box is started and then the step of refrigerating the storage box further comprises: stopping refrigerating the storage box after the internal temperature of the storage box is lower than a fifth set threshold value; and the storage box is subjected to freezing control according to a preset refrigerating starting condition and a refrigerating closing condition of the storage box so as to maintain a freezing storage environment of the storage box, and the fifth set threshold value is smaller than the second set threshold value.
Optionally, in the step of performing freezing control on the storage box according to the preset refrigeration starting condition and refrigeration closing condition of the storage box, the method further comprises: the electromagnetic coil is electrified when the storage box is started or stopped to refrigerate; or when the refrigeration of the storage box is started, the electromagnetic coil is electrified, and the electrification of the electromagnetic coil is stopped before the refrigeration of the storage box is stopped.
Optionally, in the step of performing freezing control on the storage box according to the preset refrigeration starting condition and refrigeration closing condition of the storage box, the method further comprises: and opening to electrify the electromagnetic coil according to a set period.
Alternatively, the magnetic pole direction of the electromagnetic coil after each energization is configured to be opposite to the magnetic pole direction after the last energization.
Optionally, the two groups of electromagnetic coils are respectively arranged on two opposite side surfaces outside the storage box, and the directions of magnetic poles generated after the two groups of electromagnetic coils are electrified are set to be the same.
Optionally, the refrigerator is the forced air cooling refrigerator, offers the air intake and the return air inlet that are used for connecting the forced air cooling refrigerator wind channel on the back wall of storing box to open and include to the cryogenic step of storing box: and opening the air inlet, and blowing the refrigerating air flow to the air inlet.
According to another aspect of the present invention, there is also provided a refrigerator including: a box body at least defining a freezing storage chamber; the storage box is arranged in a freezing storage compartment of the refrigerator, and at least one group of electromagnetic coils are arranged on the outer side of the storage box; and a controller including a memory and a processor, wherein the memory stores a control program, and the control program is executed by the processor to implement any one of the above-mentioned freezing control methods for the refrigerator.
The refrigerator and the freezing control method thereof of the invention acquire the internal temperature change before the storage box is opened and after the storage box is closed after the storage box in the freezing storage room is opened and closed, whether a new food material is put in or whether the food material needs to be re-frozen is determined through the change of the internal temperature of the storage box, after the amplitude of the change of the internal temperature is determined to be larger than a first set threshold value (namely under the condition that the food materials need to be frozen), the storage box is started to be refrigerated, a magnetic field is generated through an electromagnetic coil, so that the food material is frozen in a magnetic field environment, the growth of ice crystal nuclei is inhibited, the growth rate of the ice crystals is higher than the migration rate of water molecules, the generated ice crystals are smaller, thereby reduce the damage that causes the cell, avoid the juice to run off, guaranteed to eat the better taste of material, improved freezing storing quality, satisfied the user and to the storage quality requirement of precious edible material.
Furthermore, the refrigerator and the freezing control method thereof improve the opening and closing conditions of the electromagnetic field, improve the use efficiency of the magnetic field in the period of the ice crystal formation, avoid the influence of the magnetic field on other parts outside the storage box on one hand, and improve the energy consumption of the refrigerator on the other hand.
Furthermore, the refrigerator and the freezing control method thereof can be regularly started during the normal refrigeration period of the storage box, so that the long-term freezing and fresh-keeping effect of the stored objects is ensured.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic perspective view of a refrigerator according to one embodiment of the present invention;
FIG. 2 is a schematic view of a storage box of a refrigerator according to one embodiment of the present invention;
FIG. 3 is a schematic view of a magnetically conductive outer frame of the storage box of the refrigerator according to one embodiment of the invention;
FIG. 4 is a schematic view of an electromagnetic coil in a storage box of a refrigerator according to one embodiment of the present invention;
FIG. 5 is a schematic view of a magnetic field formed in a storage box of a refrigerator according to an embodiment of the present invention;
FIG. 6 is a schematic view of another magnetic field formed in a storage box of a refrigerator according to an embodiment of the present invention;
fig. 7 is a block diagram of a control system of a refrigerator according to one embodiment of the present invention;
fig. 8 is a schematic view of a freezing control method of a refrigerator according to an embodiment of the present invention; and
fig. 9 is a schematic flowchart of a freezing control method of a refrigerator according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic perspective view of a refrigerator 10 according to one embodiment of the present invention. The refrigerator 10 of the present embodiment may generally include a cabinet 120, a door 110, and a refrigeration system (not shown in the drawings). The housing 120 may define at least one storage compartment, typically a plurality of storage compartments, with an open front side, such as a refrigerated storage compartment, a frozen storage compartment, a temperature-variable storage compartment, and the like. The number and function of the specific storage compartments can be configured according to pre-determined requirements. The refrigerator 10 of this embodiment should at least have a freezing compartment or a temperature-variable compartment (i.e., a compartment that can be used to achieve a freezing storage environment) with a temperature that can reach the freezing range. The temperature range of the frozen stock may be generally set to-14 ℃ to-22 ℃.
The refrigerator 10 of the present embodiment may be an air-cooled refrigerator, and an air path system is disposed in the cabinet 120, and a fan is used to send the cooling air that has exchanged heat with the heat exchanger to the storage compartment through the air supply opening, and then return the cooling air to the air duct through the air return opening. And refrigeration is realized. Since the refrigerator body 120, the door 110, and the refrigeration system themselves are well known and easily implemented by those skilled in the art, the details of the refrigerator body 120, the door 110, and the refrigeration system themselves are not described below in order to avoid covering and obscuring the invention points of the present application.
A storage box 200 is arranged in the freezing storage chamber. The storage box 200 forms an independent and closed freezing storage space, which can improve the storage quality of the freezing storage space by means of a magnetic field. Under the action of a magnetic field with certain strength, the free path of water molecules can be limited in the freezing process, and hydrogen bonds in the water molecule clusters are broken. Because the growth of crystal nucleus is inhibited, the growth rate of ice crystal is higher than the migration rate of water molecules, the generated ice crystal is smaller, thereby causing less damage to cells, reducing the loss rate of juice and preserving the nutrition and taste of food materials better. In addition, the magnetic field can shorten the freezing time and help to inhibit the number of microorganisms and bacteria.
Fig. 2 is a schematic view of a storage box 200 of the refrigerator 10 according to one embodiment of the present invention. The storage box 200 may include: a magnetically conductive bezel 210, an electromagnetic coil 230, and the like.
Fig. 3 is a schematic view of a magnetically conductive outer frame 210 in the storage box 200 of the refrigerator 10 according to one embodiment of the invention. The magnetic conductive outer frame 210 is made of a magnetic material, and bosses 220 are formed on opposite inner walls thereof, respectively. The magnetic material may be soft magnetic material or hard magnetic material, for example, soft magnetic material may be used, the soft magnetic material is characterized by having low coercive force and high magnetic permeability, and the magnetic outer frame 210 may be used to gather the magnetic field, prevent the magnetic field from releasing to the outer wall of the storage box 200, and prevent interference (for example, magnetic attraction, etc. generated to other components) on the outer side of the storage box 200.
At least one set of electromagnetic coils 230 is matched with the magnetic conductive outer frame 210 and configured to generate a magnetic field after being electrified, and magnetic lines of the magnetic field penetrate through the internal space of the magnetic conductive outer frame 210 and then complete a closed loop through the magnetic conductive outer frame 210.
In some preferred embodiments, the electromagnetic coils 230 may be in two groups. The magnetic conductive outer frame 210 can be a frame body in a shape of a square, i.e. a square cylinder. The front end and the rear end of the square frame body are respectively provided with a through opening. As shown in fig. 3, in some embodiments, the bosses 220 may be formed on the inside of the top and bottom walls of the frame in a square shape. In other embodiments, the bosses 220 are formed on the inner sides of the two side walls of the frame body. In view of the structure of the freezing storage compartment, the upper and lower longitudinal dimensions of which are smaller than the left and right transverse dimensions, and the dimensions of the top and bottom walls of which are larger, to facilitate the arrangement of the electromagnetic coil 230, it is preferable that the present embodiment forms the bosses 220 on the inner sides of the top and bottom walls of the frame body in a shape of a square. The inner circumference of the coil is shaped to fit the outer circumference of the boss 220.
The cross-section of the boss 220 may be square, circular or elliptical, and when a square cross-section is used, the boss 220 is more easily matched with the structure of the case 120. The inner circumference of the solenoid coil 230 is shaped to fit the outer circumference of the boss 220 and is correspondingly square, circular or elliptical.
Fig. 4 is a schematic view of an electromagnetic coil 230 in the storage box 200 of the refrigerator 10 according to one embodiment of the present invention. The electromagnetic coil 230 may be formed in a flat box shape and wound in a circumferential direction such that a magnetic pole direction of a magnetic field generated after the electromagnetic coil 230 is energized is perpendicular to the boss 220. The height of the boss 220 may be adapted to the thickness of the solenoid coil 230, so that the inner wall of the frame body in the shape of a square with the solenoid coil 230 is substantially flush, so as to arrange the storage box. In other embodiments, solenoid 230 may be configured as a flat, elliptical ring or ring.
In order to ensure uniform magnetic field strength, two sets of electromagnetic coils 230 may be arranged oppositely. The two sets of electromagnetic coils 230 may be mirror images of each other and the magnetic pole directions of the generated magnetic fields are arranged to be the same. Fig. 5 and 6 are schematic views of a magnetic field formed in the storage box 200 of the refrigerator 10 according to one embodiment of the present invention, respectively, with the drawer 242 hidden to show an internal structure. The magnetic poles are also oriented so that the magnetic lines of force are oriented in the same direction. In some embodiments, the two sets of electromagnetic coils 230 can change the direction of the magnetic poles by adjusting the direction of the applied current, but the two sets of electromagnetic coils 230 are switched simultaneously to form a magnetic field similar to that of fig. 5 or 6. The magnetic lines of force of the magnetic field penetrate through the inner space of the magnetic conduction outer frame 210 and then complete the closed loop through the magnetic conduction outer frame 210, so that the uneven distribution of the magnetic field or the influence on the external parts of the storage box 200 is avoided.
The magnetic conduction outer frame 210 is used for guiding the magnetic field generated by the electromagnetic coil 230, so as to avoid the uneven magnetic field and other parts affecting the outside of the storage box 200, and enable the electromagnetic coil 230 to form a magnetic field which is even and has enough strength to meet the requirement of improving the quality of the frozen storage in the frozen storage space. Further, the magnetic conduction outer frame 210 also provides an assembly structure for the electromagnetic coil 230, and reduces the occupied space, thereby improving the practicability.
The storage box 200 may form an independent and sealed freezing storage space, thereby providing a better freezing storage environment for a specific food material.
The storage box 200 may include: a tub 241 and a drawer 242. The outer cylinder 241 is disposed in the magnetic conductive outer frame 210 and has a forward opening. The drawer 242 is drawably provided in the outer tub 241. The front panel of the drawer 242 may form a sealing structure with the outer tub 241. When the refrigerator 10 uses air cooling to cool, an air inlet 243 and an air return 244 are formed in the rear wall of the outer cylinder 241, the air inlet 243 is used for connecting an air duct air supply outlet of the refrigerator 10 or communicating with an evaporator of the refrigerator 10 (for example, communicating with the top area of the evaporator) so as to introduce a cooling air flow into the storage box; the return air inlet 244 is adapted to be coupled to a duct return air inlet of the refrigerator 10 or to an evaporator of the refrigerator 10 (e.g., to a bottom region of the evaporator) to return a heat exchanged air stream to the return air duct or evaporator of the refrigerator 10. In some embodiments, the intake opening 243 and the return opening 244 may be provided with dampers (not shown). The air door is controlled to be opened when cooling air supply is carried out. The air inlet 243 and the air return 244 may be configured according to the position and structure of the air duct and the evaporator of the air-cooled refrigerator, and in other embodiments, the air return 244 may also be disposed on the sidewall of the outer tub 241.
The refrigerator 10 of this embodiment combines the magnetic field control of the electromagnetic coil 230 with the refrigeration control, so as to ensure that the food is frozen in the magnetic field environment, thereby achieving the effect of fresh-keeping and freezing. Fig. 7 is a block diagram of a control system of the refrigerator 10 according to an embodiment of the present invention, and the refrigerator 10 is further provided with a storage temperature sensor 250, a coil temperature sensor 260, a drawer opening/closing detector 270, and a controller 300.
The storage temperature sensor 250 is provided in the outer cylinder 241 of the storage box 200 and detects the temperature in the drawer 242. A coil temperature sensor 260 is disposed adjacent to the location of the electromagnetic coil 230 and is used to detect the temperature at the electromagnetic coil 230, and in some embodiments the coil temperature sensor 260 may be disposed at the electromagnetic coil 230 at the bottom of the drawer 242. The drawer opening/closing detector 270 is configured to detect an open/closed state of the drawer 242.
When the electromagnetic coil 230 generates a magnetic field, heat is generated to some extent. Therefore, in order to avoid the heat of the solenoid coil 230 from affecting the cooling, the solenoid coil 230 is further configured to de-energize when the temperature detected by the coil temperature sensor 260 exceeds a preset protection temperature, thereby achieving the overheat protection.
Drawer opening/closing detector 270 is configured to detect the open/close state of drawer 242. After the drawer 242 is pulled open and then closed, it is possible to detect whether a new food material is put in or whether an original food material needs to be re-frozen by means of the storage temperature sensor 250. Then, the electromagnetic coil 230 is matched with a refrigerating system, so that magnetic field-assisted freezing can be realized, and the freezing and fresh-keeping effects of food materials are improved.
The controller 300 includes a memory 310 and a processor 320. The memory 310 stores a control program 311, and the control program 311 is used for controlling the electromagnetic coil 230 and the refrigeration system when being executed by the processor 320, so as to implement the freezing control method of the refrigerator provided by the embodiment. Various sensors provide detection means for magnetic field control, so that the control requirement of the control method can be met.
Fig. 8 is a schematic diagram of a freezing control method of a refrigerator according to an embodiment of the present invention, the freezing control method including:
step S802, detecting the opening and closing state of the storage box 200;
step S804, determining that an opening/closing event occurs in which the storage box 200 is closed after being opened;
step S806, acquiring the internal temperature change before the storage box 200 is opened and after the storage box 200 is closed, wherein the internal temperature change of the storage box 200 reflects the state of the stored food, and if the internal temperature change has a large amplitude, it indicates that the storage box 200 is filled with new food, or whether the temperature of the food has risen and needs to be frozen again; if the magnitude of the internal temperature change is small, it indicates that the food may still be in a frozen state.
Step S808, if the amplitude of the internal temperature change is greater than the first set threshold, starting to cool the storage box 200 and electrifying the electromagnetic coil 230, so as to generate a magnetic field in the storage box 200 by using the electromagnetic coil 230; the first threshold value of setting can set up to 2 ~ 8 degrees centigrade, and it can be according to freezing temperature setting and set up in a flexible way. The electromagnetic coil 230 generates a magnetic field when the amplitude of the internal temperature change is greater than the first set threshold, so that the food material is influenced by the magnetic field in the freezing process, and the preservation effect is improved. In addition, the starting condition of the electromagnetic coil 230 is set, so that on one hand, the energy consumption is reduced, and on the other hand, the influence of the magnetic field on other parts outside the storage box 200 can be avoided.
In step S810, after the internal temperature of the storage box 200 is lower than the second set threshold, the power supply to the electromagnetic coil 230 is stopped. The second set threshold may be set to a temperature at which freezing of the food material is completed, for example, may be set to-12 to-18 degrees celsius.
When the electromagnetic coil 230 generates a magnetic field, heat is generated to some extent. Therefore, in order to avoid the heat of the electromagnetic coil 230 from affecting the refrigeration, namely, after the electromagnetic coil 230 is overheated, the overheat protection is realized through power failure.
One solution for overheat protection is: after the steps of cooling the storage box 200 and energizing the electromagnetic coil 230 are turned on, the method further comprises the following steps: detecting the temperature at the solenoid coil 230; after the temperature at solenoid 230 exceeds the third set threshold, power to solenoid 230 is stopped to avoid solenoid 230 affecting cooling. The third set threshold may be set to-2 to 0 degrees. This over-temperature protection scheme can ensure that the solenoid coil 230 is protected once it is at an excessive temperature.
An alternative to overtemperature protection is: the temperature at the solenoid coil 230 may also be detected after the step of turning on the cooling of the storage box 200 and energizing the solenoid coil 230; when the temperature difference between the temperature of the electromagnetic coil 230 and the internal temperature of the storage box 200 is greater than the fourth set threshold, the electromagnetic coil 230 is not energized. The fourth set threshold may be set at 2-4 degrees celsius. Because the electromagnetic coil 230 is also positioned in the freezing storage compartment, the temperature difference between the temperature of the electromagnetic coil 230 and the internal temperature of the storage box 200 can reflect the heating condition of the electromagnetic coil 230, so that the influence of the electromagnetic coil 230 on normal refrigeration can be avoided.
After the step of refrigerating the storage box 200 is started, the method further comprises the following steps: after the internal temperature of the storage box 200 is lower than a fifth set threshold, the refrigeration of the storage box 200 is stopped; and the storage box 200 is controlled to be frozen according to the refrigeration starting condition and the refrigeration closing condition preset by the storage box 200 so as to maintain the frozen storage environment of the storage box 200, and the fifth set threshold is smaller than the second set threshold. The fifth set threshold may be set according to the set temperature of the storage box 200, and may also be lower than the shutdown temperature of the normal freezing control, for example, may be set to be 2-4 degrees celsius lower than the set temperature. Since the cooling is performed after the storage box 200 is opened, the fifth set threshold is set to be lower, thereby achieving supercooling to some extent and improving the quality of the frozen stored articles. The refrigeration starting condition and the refrigeration closing condition can be set according to the set temperature of the storage box 200, refrigeration is started when the refrigeration starting temperature is higher than the refrigeration starting temperature, and refrigeration is stopped when the refrigeration starting temperature is lower than the refrigeration closing temperature.
After the magnetic field assisted freezing and refrigerating are completed, the normal freezing control of the storage box is recovered, namely the freezing control is performed on the storage box 200 according to the preset refrigerating starting condition and refrigerating closing condition of the storage box 200. The step of performing freezing control on the storage box 200 according to the preset refrigeration starting condition and refrigeration closing condition of the storage box 200 can also use magnetic field for assisting refrigeration, so that the storage quality is prevented from being reduced when part of ice crystals are regenerated. For example, the solenoid coil 230 may be energized when the storage box 200 is being cooled, i.e., the magnetic field and the cooling are simultaneously turned on and off. Another alternative is: the electromagnetic coil 230 is powered when the refrigeration of the storage box 200 is started, and the electromagnetic coil 230 is powered off before the refrigeration of the storage box 200 is stopped, that is, the magnetic field is started only at the starting stage of the refrigeration. Through practical tests, the storage quality of the magnetic field started only in the initial stage of refrigeration does not obviously reduce when the magnetic field and the refrigeration are started and stopped simultaneously.
Another method for starting the magnetic field during long-term freezing is as follows: in the process of performing the freezing control on the storage box 200 according to the preset refrigeration starting condition and the refrigeration closing condition of the storage box 200, the electromagnetic coil 230 is powered on according to a set period, that is, the electromagnetic coil 230 is periodically started.
In another embodiment, the magnetic pole direction of the electromagnetic coil 230 after each energization may be configured to be opposite to the magnetic pole direction after the last energization. By the alternation of the magnetic pole directions, the ice crystal generating conditions can be changed to a certain degree, and a better effect is achieved. The alternation of the magnetic pole directions can be achieved by adjusting the direction of the energizing current of the electromagnetic coil 230.
When applied to an air-cooled refrigerator, the step of opening the cooling of the storage box 200 may include: the intake vent is opened and the flow of refrigerant gas is blown into the intake vent 243.
Fig. 9 is a schematic flowchart of a freezing control method of a refrigerator according to an embodiment of the present invention. The flow of this embodiment is a specific application example of the freezing control method of the refrigerator, in which the execution sequence of some steps can be adjusted. The process may include:
step S902, detecting an open/close state of the storage box 200;
step S904, determining that the storage box 200 is opened and then closed, i.e., determining whether an opening/closing event occurs in the storage box 200;
step S906, obtaining the internal temperature change before the storage box 200 is opened and after the storage box 200 is closed, and determining whether the amplitude of the internal temperature change is greater than a first set threshold, that is, determining whether new food is put into the storage box 200, or whether the temperature of the food has risen and needs to be refrozen, where the first set threshold may be set to 2-8 ℃. .
Step S908, starting cooling, supplying air to the storage box 200, and simultaneously energizing the electromagnetic coil 230 to generate a magnetic field in the storage box 200, and assisting cooling by the magnetic field;
step S910, continuously detecting the internal temperature of the storage box 200 and the temperature of the electromagnetic coil 230;
in step S912, it is determined whether the heat generated by the solenoid 230 exceeds a limit, that is, whether the heat generated by the solenoid 230 affects normal cooling. The basis for determining the overrun may include: the temperature at the solenoid coil 230 exceeds a preset third set threshold (which may be set, for example, to-2 to 0 degrees celsius); or the temperature difference between the temperature at the electromagnetic coil 230 and the internal temperature of the storage box 200 is greater than a fourth set threshold (e.g., may be set to 2 to 4 degrees celsius).
Step S914, determining whether the internal temperature of the storage box 200 is lower than a second set threshold (for example, it may be set to-12 to-18 ℃), that is, determining whether the freezing stage is completed;
step S916, stopping the energization of the electromagnetic coil 230;
in step S920, it is determined that the internal temperature of the storage box 200 is lower than a fifth set threshold, where the fifth set threshold may be set according to the set temperature of the storage box 200, and may also be lower than the shutdown point temperature of the normal freezing control, for example, may be set to be 2-4 degrees celsius lower than the set temperature.
Step S922, stopping refrigerating the storage box 200, and recovering normal refrigeration control of the storage box 200;
step S924, activating the magnetic field according to a set strategy, where the set strategy may include: the magnetic field and refrigeration are started and stopped simultaneously, the magnetic field is started only at the initial stage of refrigeration, or the magnetic field is started periodically.
The refrigerator 10 and the freezing control method thereof in the embodiment enable food materials to be frozen in a magnetic field environment, inhibit ice crystal nucleus growth, reduce damage to cells, avoid juice loss, ensure better taste of the food materials, improve frozen storage quality, meet storage quality requirements of users on precious food materials, optimize the control method, improve the use efficiency of the magnetic field, avoid influences of the magnetic field on other parts outside the storage box 200 on the one hand, and improve energy consumption of the refrigerator on the other hand.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A freezing control method of a refrigerator is characterized in that a storage box is arranged in a freezing storage chamber of the refrigerator, at least one set of electromagnetic coils are arranged outside the storage box, and the freezing control method comprises the following steps:
detecting the opening and closing state of the storage box;
after an opening and closing event that the storage box is opened and then closed is determined, acquiring the internal temperature change of the storage box before and after the storage box is opened;
if the amplitude of the internal temperature change is larger than a first set threshold value, the storage box is started to be refrigerated, and the electromagnetic coil is electrified, so that a magnetic field is generated in the storage box by the electromagnetic coil;
and stopping the energization of the electromagnetic coil after the internal temperature of the storage box is lower than a second set threshold value.
2. The freezing control method of a refrigerator according to claim 1,
the refrigerator further comprises the following steps after the steps of refrigerating the storage box and electrifying the electromagnetic coil are started:
detecting a temperature at the electromagnetic coil;
and after the temperature at the electromagnetic coil exceeds a third set threshold value, stopping electrifying the electromagnetic coil so as to avoid the electromagnetic coil from influencing refrigeration.
3. The freezing control method of a refrigerator according to claim 1,
the refrigerator further comprises the following steps after the steps of refrigerating the storage box and electrifying the electromagnetic coil are started:
detecting a temperature at the electromagnetic coil;
and stopping electrifying the electromagnetic coil after the temperature difference between the electromagnetic coil and the internal temperature of the storage box is larger than a fourth set threshold value.
4. The freezing control method of a refrigerator according to claim 1,
after the step of opening the refrigeration of the storage box, the refrigerator further comprises the following steps:
stopping refrigerating the storage box after the internal temperature of the storage box is lower than a fifth set threshold value; and freezing control is carried out on the storage box according to a preset refrigeration starting condition and a preset refrigeration closing condition of the storage box so as to maintain a frozen storage environment of the storage box, and the fifth set threshold is smaller than the second set threshold.
5. The freezing control method of a refrigerator according to claim 4,
in the step of controlling freezing of the storage box according to the preset refrigeration starting condition and refrigeration closing condition of the storage box, the method further comprises the following steps:
starting and stopping to electrify the electromagnetic coil while refrigerating the storage box; or
The electromagnetic coil is powered on when the storage box is started to refrigerate, and the electromagnetic coil is powered off before the refrigeration of the storage box is stopped.
6. The freezing control method of a refrigerator according to claim 4,
in the step of controlling freezing of the storage box according to the preset refrigeration starting condition and refrigeration closing condition of the storage box, the method further comprises the following steps:
and starting to electrify the electromagnetic coil according to a set period.
7. The freezing control method of a refrigerator according to claim 5 or 6,
the magnetic pole direction of the electromagnetic coil after each energization is opposite to the magnetic pole direction after the last energization.
8. The freezing control method of a refrigerator according to claim 1,
the two groups of electromagnetic coils are respectively arranged on two opposite side surfaces of the outer side of the storage box, and the directions of magnetic poles generated after the two groups of electromagnetic coils are electrified are set to be the same.
9. The freezing control method of a refrigerator according to claim 1,
the refrigerator is an air-cooled refrigerator, the rear wall of the storage box is provided with an air inlet and an air return inlet which are used for connecting an air duct of the air-cooled refrigerator, and
the step of opening the storage box to refrigerate comprises the following steps: and opening the air inlet, and blowing a refrigerating air flow to the air inlet.
10. A refrigerator characterized by comprising:
a box body at least defining a freezing storage chamber;
the storage box is arranged in a freezing storage chamber of the refrigerator, and at least one group of electromagnetic coils are arranged on the outer side of the storage box; and
a controller including a memory and a processor, the memory storing a control program, the control program being executed by the processor to implement the freezing control method of the refrigerator according to any one of claims 1 to 9.
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| CN202011638006.3A CN114688798B (en) | 2020-12-31 | 2020-12-31 | Refrigerator and refrigeration control method thereof |
| PCT/CN2021/130610 WO2022142780A1 (en) | 2020-12-31 | 2021-11-15 | Freezing control method for refrigerator, and refrigerator |
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| CN202011638006.3A CN114688798B (en) | 2020-12-31 | 2020-12-31 | Refrigerator and refrigeration control method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004028559A (en) * | 2002-05-10 | 2004-01-29 | Glocal:Kk | Freezer |
| CN111043829A (en) * | 2018-10-11 | 2020-04-21 | 青岛海尔股份有限公司 | Refrigerating and freezing device and control method thereof |
| CN111043826A (en) * | 2018-10-11 | 2020-04-21 | 青岛海尔股份有限公司 | Refrigerating and freezing device and control method thereof |
| CN111536748A (en) * | 2020-04-24 | 2020-08-14 | 海信（山东）冰箱有限公司 | Refrigerator and control method thereof |
| CN111623574A (en) * | 2020-05-12 | 2020-09-04 | 珠海格力电器股份有限公司 | Freezing method and freezing equipment |
-
2020
- 2020-12-31 CN CN202011638006.3A patent/CN114688798B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004028559A (en) * | 2002-05-10 | 2004-01-29 | Glocal:Kk | Freezer |
| CN111043829A (en) * | 2018-10-11 | 2020-04-21 | 青岛海尔股份有限公司 | Refrigerating and freezing device and control method thereof |
| CN111043826A (en) * | 2018-10-11 | 2020-04-21 | 青岛海尔股份有限公司 | Refrigerating and freezing device and control method thereof |
| CN111536748A (en) * | 2020-04-24 | 2020-08-14 | 海信（山东）冰箱有限公司 | Refrigerator and control method thereof |
| CN111623574A (en) * | 2020-05-12 | 2020-09-04 | 珠海格力电器股份有限公司 | Freezing method and freezing equipment |
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