CN109000420B - Thawing device and refrigerator with thawing device - Google Patents
Thawing device and refrigerator with thawing device Download PDFInfo
- Publication number
- CN109000420B CN109000420B CN201710420171.3A CN201710420171A CN109000420B CN 109000420 B CN109000420 B CN 109000420B CN 201710420171 A CN201710420171 A CN 201710420171A CN 109000420 B CN109000420 B CN 109000420B
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- thawing
- radio frequency
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- chamber
- defrosting
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- 238000010257 thawing Methods 0.000 title claims abstract description 212
- 238000005192 partition Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 11
- 230000004308 accommodation Effects 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 claims description 4
- 235000013305 food Nutrition 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 10
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 9
- 238000007710 freezing Methods 0.000 description 8
- 230000008014 freezing Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 235000015278 beef Nutrition 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 102100031786 Adiponectin Human genes 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 101000775469 Homo sapiens Adiponectin Proteins 0.000 description 2
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- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
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- 238000013021 overheating Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/46—Dielectric heating
- H05B6/48—Circuits
-
- 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
- F25D23/00—General constructional features
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/46—Dielectric heating
- H05B6/62—Apparatus for specific applications
-
- 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
- F25D2400/02—Refrigerators including a heater
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Freezing, Cooling And Drying Of Foods (AREA)
- Constitution Of High-Frequency Heating (AREA)
Abstract
The invention provides a thawing device. The thawing apparatus includes: a barrel defining a thawing chamber having a forward opening for receiving an object to be treated; the device door body is arranged at the forward opening of the defrosting chamber and used for opening and closing the defrosting chamber; a radio frequency generation module configured to generate a radio frequency signal; the upper electrode plate and the lower electrode plate are respectively and horizontally arranged at the top wall and the bottom wall of the thawing chamber and are respectively and electrically connected with the radio frequency generating module so as to generate radio frequency waves with corresponding frequencies in the thawing chamber according to radio frequency signals and defrost objects to be treated in the thawing chamber; the cylinder body is internally provided with a vertical partition plate which extends from the top plate of the cylinder body to the top plate of the cylinder body along the vertical direction and the transverse direction; and the radio frequency generation module is arranged between the vertical partition plate and the rear plate of the cylinder body, and the defrosting cavity is arranged on the front side of the vertical partition plate. The thawing device has a large taking and placing port, and improves the convenience of a user in taking and placing objects to be treated.
Description
Technical Field
The invention relates to the field of thawing, in particular to a thawing device and a refrigerator with the thawing device.
Background
The quality of the food is maintained during freezing, however frozen food requires thawing prior to processing or consumption. In order to facilitate the user's freezing and thawing of food, the prior art generally thaws food by providing a heating device or a microwave device in a refrigerator.
However, when food is thawed by the heating device, a long thawing time is generally required, the thawing time and the thawing temperature are not easy to grasp, water evaporation and juice loss of the food are easily caused, and the quality of the food is lost; the microwave device is used for thawing food, the speed is high, the efficiency is high, the loss of nutrient components of the food is low, but the microwave has different penetration and absorption of water and ice, the internal substances of the food are unevenly distributed, the energy absorbed by the thawed areas is more, and the problems of uneven thawing and local overheating are easily caused. In view of the above, there is a need in design for a thawing apparatus and refrigerator having high thawing efficiency, thawing uniformity, and guaranteeing food quality.
Disclosure of Invention
An object of the first aspect of the present invention is to provide a defrosting apparatus that facilitates access to and placement of an object to be treated.
A further object of the first aspect of the invention is to avoid excessive thawing of the object to be treated.
An object of the second aspect of the present invention is to provide a refrigerator having the thawing apparatus.
In particular, according to a first aspect of the present invention, there is provided a defrosting device comprising:
a barrel defining a defrosting chamber therein having a forward opening for placing an object to be treated;
the device door body is arranged at the forward opening of the defrosting chamber and is used for opening and closing the defrosting chamber;
the radio frequency generation module is configured to generate radio frequency signals; and
the upper electrode plate and the lower electrode plate are respectively and horizontally arranged at the top wall and the bottom wall of the thawing chamber and are respectively and electrically connected with the radio frequency generation module so as to generate radio frequency waves with corresponding frequencies in the thawing chamber according to the radio frequency signals and defrost objects to be treated in the thawing chamber; wherein the method comprises the steps of
A vertical partition plate extending from the top plate of the cylinder body to the top plate of the cylinder body along the vertical direction and the transverse direction is arranged in the cylinder body; and the radio frequency generation module is arranged between the vertical partition plate and the rear plate of the cylinder body, and the thawing chamber is arranged at the front side of the vertical partition plate.
Optionally, a device air inlet is formed in the rear plate of the cylinder, and a defrosting air inlet is formed in the vertical partition plate, so that air outside the defrosting device enters the defrosting chamber through the device air inlet and the defrosting air inlet; and is also provided with
And the side plates at the two lateral sides of the defrosting chamber are provided with device air outlets, so that the air in the defrosting chamber is discharged out of the defrosting device through the device air outlets.
Optionally, the device air inlet and the thawing air inlet are respectively arranged at two lateral sides of the radio frequency generation module, so that heat dissipation of the radio frequency generation module is facilitated.
Optionally, the thawing device further comprises:
the tray is arranged in the thawing chamber and used for bearing the object to be treated; and is also provided with
The tray is configured to controllably move in a depth direction of the thawing chamber to facilitate placement and removal of the treatment object.
Optionally, the distance between the lower surface of the tray and the lower electrode plate is 8-12 mm, so that friction between the tray and the lower electrode plate is prevented in the moving process.
Optionally, the thawing device further comprises:
the detection module is configured to detect an incident wave signal and a reflected wave signal of an electric connection line connecting the radio frequency generation module and the upper electrode plate, and calculate the change rate of the dielectric coefficient of the object to be processed according to the voltage and the current of the incident wave signal and the voltage and the current of the reflected wave signal.
Optionally, the cylinder further comprises:
the horizontal partition plate is arranged to extend forwards from the vertical partition plate along the horizontal direction, and the detection module is arranged between the horizontal partition plate and the top plate of the cylinder body; and is also provided with
The upper electrode plate is arranged on the lower surface of the horizontal partition plate, and the lower electrode plate is arranged on the upper surface of the bottom plate of the cylinder body.
Optionally, the radio frequency generating module is configured to:
when the change rate of the dielectric coefficient of the object to be treated is greater than or equal to a first rate threshold, the working power of the object to be treated is reduced by 30% -40%, so that the object to be treated is prevented from being excessively thawed; and/or
And stopping working when the change rate of the dielectric coefficient of the object to be treated is reduced to be less than or equal to a second rate threshold value.
According to a second aspect of the present invention, there is provided a refrigerator comprising a cabinet defining at least one accommodation space and a thawing device as described in any of the above, which is provided in one of the accommodation spaces.
Optionally, the refrigerator further defines a compressor compartment for housing a compressor, wherein the refrigerator further comprises:
and the power supply module is arranged in the compressor chamber and is used for supplying power to the radio frequency generation module.
According to the invention, the vertical partition plate extending along the vertical direction and the transverse direction is arranged in the cylinder body, and the radio frequency generation module is arranged between the vertical partition plate and the rear plate of the cylinder body, so that the thawing device has a large taking and placing opening, and the convenience of taking and placing objects to be treated by a user is improved.
Furthermore, the front side of the vertical partition plate is provided with the horizontal partition plate, and the detection module is arranged between the horizontal partition plate and the top plate of the cylinder body, so that the defrosting device is compact in structure and convenient for electric connection between the components.
Further, the invention calculates the change rate of the dielectric coefficient of the object to be processed through the detection module to judge the thawing progress of the object to be processed. Prior to the present invention, it was widely recognized by those skilled in the art that when the temperature of the object to be treated was high (i.e., the temperature of the object to be treated was equal to or higher than-7 ℃), the thermal effect was significantly attenuated, and thus the object to be treated was not excessively thawed. However, this is not the case, and the rf thawing power is usually large, for example, greater than 100W, and when the temperature of the object to be treated is high, the object to be treated is extremely liable to be excessively thawed. The inventor of the application creatively realizes that when the temperature of the object to be treated is higher, the working power of the radio frequency generating module is reduced by 30-40%, so that the object to be treated can be effectively prevented from being excessively thawed. Furthermore, the invention judges whether the thawing is finished or not through the change rate of the dielectric coefficient of the object to be treated, compared with the prior art that whether the thawing is finished or not is judged by sensing the temperature of the object to be treated, the judgment is more accurate, the object to be treated can be further prevented from being excessively thawed, and tests show that the temperature of the object to be treated thawed by the thawing device is generally-4 to-2 ℃ when the thawing is finished, and the generation of blood water when the object to be treated is meat can be avoided.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
fig. 1 is a schematic configuration view of a defrosting apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along section line A-A in FIG. 1;
fig. 3 is a schematic structural view of the thawing device of fig. 1, in which a device door body of the thawing device is removed to show an internal structure of the cylinder;
FIG. 4 is a graph of the rate of change of the dielectric constant of an object to be treated according to one embodiment of the present invention;
FIG. 5 is a schematic block diagram of a refrigerator in which all outer doors of the refrigerator are removed to show a compartment structure within the refrigerator cabinet according to an embodiment of the present invention;
fig. 6 is a schematic cross-sectional view of the refrigerator shown in fig. 5;
FIG. 7 is a schematic block diagram of the compressor compartment of FIG. 6;
fig. 8 is a flowchart of a defrosting method for a refrigerator according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic configuration diagram of a defrosting apparatus 100 according to an embodiment of the present invention. Referring to fig. 1, the thawing apparatus 100 can include a cylinder 110, an apparatus door 120, a radio frequency generating module 130, and upper and lower electrode plates 140a and 140b. The barrel 110 may include a top plate, a bottom plate, a rear plate, and opposing lateral side plates, and may define a defrost chamber 114 having a forward opening therein, the defrost chamber 114 being for placing an object to be treated. The device door 120 may be disposed at a forward opening of the thawing chamber 114 for opening or closing the thawing chamber 114. The device door 120 may be mounted with the cartridge 110 by any suitable means, such as left-hand, right-hand, or up-hand. The radio frequency generation module 130 may be configured to generate radio frequency signals (typically radio frequency signals having frequencies in the range of 300KHz to 300 GHz). The upper electrode plate 140a and the lower electrode plate 140b may be respectively and horizontally disposed at the top wall and the bottom wall of the thawing chamber 114 and electrically connected to the rf generating module 130, respectively, so as to generate rf waves with corresponding parameters in the thawing chamber 114 according to the rf signals generated by the rf generating module 130, and thaw the objects to be treated placed in the thawing chamber 114. In the present invention, the upper electrode plate 140a is a transmitting antenna; the lower electrode plate 140b is a receiving antenna. In some embodiments, 50 ohm electrical connections may be used to electrically connect the upper and lower electrode plates 140a, 140b, respectively, to the rf generation module 130.
In particular, the drum 110 may further include a vertical partition 111 for defining an inner space of the drum 110. The vertical partition 111 may be provided to extend from the top plate of the drum 110 to the bottom plate of the drum 110 in the vertical and lateral directions of the drum 110. The rf generation module 130 may be disposed between the vertical partition 111 and the rear plate of the drum 110. A defrosting chamber 114 is defined on the front side of the vertical partition 111.
According to the invention, the vertical partition 111 extending along the vertical direction and the transverse direction is arranged in the cylinder 110, and the radio frequency generation module 130 is arranged between the vertical partition 111 and the rear plate of the cylinder 110, so that the thawing device 100 has a large taking and placing opening, and the convenience of taking and placing objects to be treated by a user is improved.
In some embodiments, thawing apparatus 100 can further include a detection module 150. The detection module 150 may be configured to detect an incident wave signal and a reflected wave signal of an electrical connection line connecting the rf generation module 130 and the upper electrode plate, and calculate a load impedance of the rf generation module 130 according to a voltage and a current of the incident wave signal and a voltage and a current of the reflected wave signal. The load impedance is calculated as follows:
SWR＝Z 2 /Z 1 (1)
Z 1 ＝U 1 /I 1 ＝R 1 +jX 1 (2)
Z 2 ＝U 2 /I 2 ＝R 2 +jX 2 (3)
in the formulas (1), (2), (3): SWR is standing wave ratio; z is Z 1 Is the output impedance; z is Z 2 Is the load impedance; u (U) 1 Is the incident wave voltage; i 1 Is an incident wave current; r is R 1 Is an output resistor; x is X 1 To output reactance; u (U) 2 Is a reflected wave voltage; i 2 Is a reflected wave current; r is R 2 Is a load resistance; x is X 2 The load reactance (as understood by those skilled in the art, the output impedance is the impedance of the electrical connection connecting the rf generation module 130 and the upper electrode plate 140a, and the load impedance is the impedance of the object to be processed).
The defrosting apparatus 100 can further include a load compensation module 160. The load compensation module 160 may include a compensation unit and a motor for adjusting the impedance of the compensation unit. The compensation unit may be disposed in series with the object to be processed, that is, the load impedance of the rf generation module 130 is the sum of the impedance of the object to be processed and the impedance of the compensation unit. The motor may be configured to controllably increase or decrease the impedance of the compensation unit, thereby increasing or decreasing the load impedance Z of the RF generation module 130 2 And causes the load impedance Z of the RF generation module 130 to be 2 And output impedance Z 1 The difference (i.e. the load impedance Z 2 Subtracting the output impedance Z 1 The obtained value) is larger than or equal to a first impedance threshold value and smaller than or equal to a second impedance threshold value, and the first impedance threshold value is smaller than the second impedance threshold value, so that the thawing efficiency of the object to be treated is improved. In some preferred embodiments, the first impedance threshold is the output impedance Z 1 From-6 to-4%, the second impedance threshold beingOutput impedance Z 1 4 to 6 percent of (3). Further preferably, the first impedance threshold is the output impedance Z 1 And the second impedance threshold is the output impedance Z 1 5% of (C). In other words, the load compensation module may be configured to cause the load impedance Z of the RF generation module 130 to 2 And output impedance Z 1 The absolute value of the difference is always smaller than the output impedance Z during the whole thawing process 1 5% of (A) may be, for example, the output impedance Z 1 1%, 3% or 5% of (a).
The detection module 150 may be configured to further rely on the load impedance Z of the RF generation module 130 2 And calculating the dielectric coefficient of the object to be treated and the change rate of the dielectric coefficient so as to judge the thawing progress of the object to be treated. The calculation formula of the dielectric coefficient of the object to be treated is as follows:
X 2 ＝1/2πfC (4)
ε＝4πKdC/S (5)
in formulas (4), (5): f is the frequency of the radio frequency wave; c is the capacitance of the capacitor formed by the upper electrode plate 140a and the lower electrode plate 140 b; epsilon is the dielectric coefficient of the object to be treated; k is the static constant; d is the thickness of the upper electrode plate; s is the area of the upper electrode plate.
The rate of change of the dielectric constant of the object to be treated can be obtained by calculating the value of change Δε of the dielectric constant ε per unit time Δt, where the unit time Δt can be 0.1 seconds to 1 second, such as 0.1 seconds, 0.5 seconds or 1 second. Fig. 4 is a graph of a change rate of dielectric constant of an object to be treated according to an embodiment of the present invention (the ordinate is a change rate Δε/Δt of the dielectric constant of the object to be treated; the abscissa is a thawing time t of the object to be treated, in min). Referring to fig. 4, in some preferred embodiments, the rf generation module 130 may be configured to reduce its operating power by 30% -40%, such as 30%, 35% or 40%, when the rate of change of the dielectric constant Δε/Δt of the object to be treated is greater than or equal to the first rate threshold, so as to prevent the object to be treated from being excessively thawed (as will be appreciated by those skilled in the art, excessively thawed to a temperature of the object to be treated of greater than 0 ℃). The first rate threshold may be 15-20, such as 15, 17, 18, or 20. The rf generation module 130 may be further configured to stop operation when the rate of change of the dielectric constant delta epsilon/delta t of the object to be treated decreases to less than or equal to the second rate threshold. The second rate threshold may be 1-2, such as 1, 1.5, or 2.
As the temperature of the object to be treated changes, the dielectric constant of the object to be treated also changes, which is well known to those skilled in the art, however, the dielectric constant is usually measured by a special instrument (e.g. a dielectric constant tester), and the special instrument occupies a large space and is costly, and is not suitable for a thawing apparatus with a smaller size. The invention obtains the dielectric coefficient of the object to be processed through detecting the incident wave signal and the reflected wave signal of the electric connection line connecting the radio frequency generating module 130 and the upper electrode plate by calculation, has small occupied space and low cost, and is particularly suitable for a thawing device. The load compensation module 160 enables the difference between the load impedance and the output impedance of the radio frequency generation module 130 to be in a preset range (greater than or equal to a first impedance threshold and less than or equal to a second impedance threshold), so that the thawing efficiency of the object to be treated is improved.
Further, the invention calculates the change rate of the dielectric coefficient of the object to be processed through the detection module 150 to judge the thawing progress of the object to be processed. Prior to the present invention, it was widely recognized by those skilled in the art that when the temperature of the object to be treated was high (i.e., the temperature of the object to be treated was equal to or higher than-7 ℃), the thermal effect was significantly attenuated, and thus the object to be treated was not excessively thawed. However, this is not the case, and the rf thawing power is usually large, for example, greater than 100W, and when the temperature of the object to be treated is high, the object to be treated is extremely liable to be excessively thawed. The inventors of the present application creatively realized that reducing the operating power of the rf generation module 130 by 30-40% when the temperature of the object to be processed is already high can effectively prevent the object to be processed from being excessively thawed. Furthermore, the invention judges whether the thawing is finished or not through the change rate of the dielectric coefficient of the object to be treated, compared with the prior art that whether the thawing is finished or not is judged by sensing the temperature of the object to be treated, the judgment is more accurate, the object to be treated can be further prevented from being excessively thawed, and tests show that the temperature of the object to be treated thawed by the thawing device is generally-4 to-2 ℃ when the thawing is finished, and the generation of blood water when the object to be treated is meat can be avoided.
In some embodiments, the cartridge 110 may also include a horizontal partition 112. The horizontal partition 112 may be provided to extend forward in the horizontal direction from the vertical partition 111. The detection module 150 and the load compensation module 160 may be disposed between the horizontal partition 112 and the top plate of the cylinder 110, not only making the structure of the thawing apparatus 100 compact, but also facilitating electrical connection between the components of the thawing apparatus 100. Thawing chamber 114 may be enclosed by vertical partition 111, horizontal partition 112, and the bottom and two lateral side panels of barrel 110. The upper electrode plate 140a may be disposed on the lower surface of the horizontal separator 112, and the lower electrode plate 140b may be disposed on the upper surface of the bottom plate of the can 110. The vertical partition 111 may be provided with a first wire passing port 1112, so that the rf generating module 130 is electrically connected to the upper electrode plate 140a through the first wire passing port 1112. The drum 110 may further include a baffle 113 extending upward from a front side end of the horizontal partition 112 to a top plate of the drum 110 in a vertical direction to prevent the detection module 150 and the load compensation module 160 from being exposed, reducing the aesthetic appearance of the thawing apparatus 100.
Fig. 2 is a schematic cross-sectional view taken along section line A-A in fig. 1. Referring to fig. 1 and 2, in some embodiments, a rear plate of the barrel 110 may be provided with a device air inlet 115, and a vertical partition 111 at a rear side of the thawing chamber 114 may be provided with a thawing air inlet 1111, so that air outside the thawing device 100 enters the thawing chamber 114 of the thawing device 100 via the device air inlet 115 and the thawing air inlet 1111. The lateral side plates of the cylinder 110 may be provided with a device air outlet 118, so that the air in the thawing chamber 114 is discharged to the outside of the thawing device 100 through the device air outlet 118.
In some preferred embodiments, the device air inlet 115 and the thawing air inlet 1111 of the thawing device 100 can be disposed at two lateral sides of the rf generating module 130, respectively, to facilitate heat dissipation of the rf generating module 130. In some alternative embodiments, the device air intake 115 and the thawing air intake 1111 of the thawing device 100 can be disposed on the same side of the rf generation module 130.
In the invention, the thawing device 100 is provided with the device air inlet 115 and the device air outlet 118, so that the thawing chamber 114 can be used for placing food materials when a thawing instruction is not received, and the storage space in the thawing device 100 is fully utilized.
The thawing device 100 can also include a tray 170. The tray 170 is disposed in the thawing chamber 114, and the object to be processed is placed on the tray 170. The tray 170 may be configured to controllably move in the depth direction of the thawing chamber 114 to facilitate placement and removal of the items to be treated. In some preferred embodiments, the lower surface of the tray 170 may be 8-12 mm, e.g., 8mm, 10mm, 12mm, from the lower electrode plate 140b to prevent friction with the lower electrode plate 140b during the drawing of the tray 170.
Fig. 3 is a schematic structural view of the thawing device 100 of fig. 1, in which a device door 120 of the thawing device 100 is removed to show the internal structure of the cylinder 110. Referring to fig. 1 and 3, the cartridge 110 and the device door 120 may be provided with electromagnetic shielding features 117, respectively. The electromagnetic shielding feature 117 provided on the barrel 110 and the electromagnetic shielding feature 117 provided on the device door 120 may be conductively coupled to reduce the amount of magnetic leakage outward of the thawing device 100 when the device door 120 is closed. The electromagnetic shielding features 117 may be a conductive coating applied to the inner wall of the barrel 110 and the inner surface of the device door 120 (the surface facing the barrel 110), a conductive metal mesh that is abutted against the inner wall of the barrel 110 and the inner surface of the device door 120, or a conductive metal mesh formed in the various plates surrounding the barrel 110 and in the device door 120, etc.
In some preferred embodiments, thawing device 100 can further include an elastic conductive loop 180. The elastic conductive loop 180 may be disposed at the periphery of the forward opening of the thawing chamber 114 such that it is deformed by compression when the device door 120 is closed, and is tightly fitted to the device door 120, i.e., the elastic conductive loop 180 forms a seal with the device door 120. The electromagnetic shielding features 117 disposed on the barrel 110 and the electromagnetic shielding features 117 disposed on the device door 120 may each be disposed in conductive contact with the elastic conductive loop 180 to reduce the amount of magnetic leakage outward of the thawing device 100 when the device door 120 is closed. In some preferred embodiments, the elastic conductive loop 180 may be made of silicone, silicone fluoride, EPDM, fluorocarbon-silicone fluoride, and silver plated aluminum. The elastic conductive loop 180 may have a hollow ring-like structure so that it closely fits the device door 120 when the device door 120 is closed. The width of the elastic conductive loop 180 may be 20 to 30mm, for example, 20mm, 25mm, or 30mm, to improve the sealability of the thawing device 100. In some preferred embodiments, the device air intake 115, the defrost air intake 1111, and the device air outlet 118 of the defrost device 100 may each be provided with a conductive metal mesh 190, and the conductive metal mesh 190 may be provided in conductive connection with an electromagnetic shielding feature 117 provided to the cylinder 110 to reduce the amount of magnetic leakage of the defrost device 100.
Particularly, in the present invention, the frequency of the rf signal generated by the rf generating module 130 (i.e. the electromagnetic wave for thawing the object to be treated) may be 40-42 MHz, for example 40MHz, 40.48MHz, 40.68MHz, 41MHz or 42MHz, so as to reduce the thawing time of the object to be treated, improve the temperature uniformity of the object to be treated and reduce the juice loss rate thereof. In the preferred embodiment, the frequency of the rf wave may be a predetermined fixed frequency within the range of 40.48-40.68 MHz, so as to further reduce the thawing time of the object to be treated, improve the temperature uniformity of the object to be treated, and reduce the juice loss rate thereof. Among them, the thawing effect is best when the frequency of the radio frequency wave is 40.68 MHz.
For a further understanding of the present invention, preferred embodiments of the invention are described below in connection with more specific examples, but the invention is not limited to these examples.
TABLE 1
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example 1 | Comparative example 2 | |
| Frequency (MHz) | 40 | 40.48 | 40.68 | 41 | 42 | 13.56 | 27.12 |
In the thawing apparatus 100 provided with the radio frequency frequencies of the above examples 1 to 5 and comparative examples 1 to 2, respectively, the power of the radio frequency wave was 100W, and the configuration of the thawing apparatus 100 and the working process thereof were the same.
The thawing effect test was performed on the thawing apparatus 100 provided with the frequencies of each example and each comparative example. Test description: 1kg of beef having the same shape and specification and an initial temperature of-18 ℃ was selected and placed on the tray 170 in the thawing apparatus 100 of each example and each comparative example, and thawing time, temperature uniformity and juice loss rate of each example and each comparative example were measured, respectively. Wherein the thawing time is from the beginning of thawing to the time when the thawing device 100 determines that thawing is complete (i.e., the rf generation module 130 stops working); temperature uniformity: after thawing, measuring the temperatures of four corners and a center point of the beef respectively, and calculating the difference value between the temperature of the center point and the average value of the four corners, wherein the temperature uniformity is the ratio of the difference value to the average value; juice loss rate: the weight of beef before thawing and the weight of beef after thawing are measured respectively, and the difference between the weight and the weight is calculated, and the juice loss rate is the ratio of the difference to the weight of beef before thawing.
The thawing effect test results according to examples 1-7 and according to comparative examples 1-2 are shown in Table 2.
TABLE 2
| Thawing time (min) | Uniformity of temperature | Juice run-off rate (%) | |
| Example 1 | 19 | 0.4 | 0.35 |
| Example 2 | 18 | 0.4 | 0.32 |
| Example 3 | 18 | 0.3 | 0.29 |
| Example 4 | 19 | 0.5 | 0.35 |
| Example 5 | 20 | 0.5 | 0.40 |
| Comparative example 1 | 25 | 0.6 | 0.35 |
| Comparative example 2 | 23 | 0.6 | 0.40 |
As can be seen from the test results of example 5 and comparative example 1 in table 2, in the case where the power of the radio frequency wave is the same and the structure of the thawing apparatus 100 and the workflow thereof are the same, under the same test conditions, the thawing effect of the thawing apparatus 100 using the radio frequency in the range of the embodiment of the present invention is superior to that of the thawing apparatus 100 using the radio frequency in the prior art, the thawing time of the former is reduced by 20% and the temperature uniformity is improved by 17%.
From the test results of examples 1 to 5 in table 2, it can be seen that the thawing time of the thawing apparatus 100 using each example of the present invention was 20min or less, the temperature uniformity was 0.5 or less, and the juice loss rate was 0.40% or less. By further preferably selecting the frequency of the rf wave (e.g., the rf frequency is 40.48-40.68 MHz), the thawing time of the thawing apparatus 100 can be reduced to 18min or less, the temperature uniformity can be improved to 0.4 or less, and the juice loss rate can be reduced to 0.32% or less.
Based on the thawing device 100 of any of the foregoing embodiments, the present invention can also provide a refrigerator 10. Fig. 5 is a schematic structural view of the refrigerator 10 according to an embodiment of the present invention, in which all outer doors of the refrigerator 10 are removed to show a compartment structure within the cabinet 200 of the refrigerator 10; fig. 6 is a schematic cross-sectional view of the refrigerator 10 shown in fig. 5. Referring to fig. 1, 5 and 6, a refrigerator 10 may generally include a cabinet 200 defining at least one receiving space, a compartment door for respectively opening and closing a taking and placing port of each receiving space, and a thawing device 100 provided at one receiving space. In the illustrated embodiment, the number of thawing devices 100 is one. The refrigerator 10 may have three receiving spaces, namely, a refrigerating compartment 210, a temperature varying compartment 220, and a freezing compartment 230, and a refrigerating door 211, a temperature varying door 221, and a freezing door 231 for opening and closing the refrigerating compartment 210, the temperature varying compartment 220, and the freezing compartment 230, respectively, and the thawing apparatus 100 is disposed in the temperature varying compartment 220. The thawing device 100 can be fixed in the temperature changing chamber 220 by interference fit or clamping with the inner walls of the two vertical sides of the temperature changing chamber 220.
It should be noted that, as is well known to those skilled in the art, the refrigerating compartment 210 refers to a storage compartment in which the storage temperature of food materials is 0 to +8 ℃; the freezing compartment 230 is a storage compartment with a preservation temperature of-20 to-15 ℃ for food materials; the temperature-changing compartment 220 is a storage compartment in which the storage temperature can be changed over a wide range (for example, the adjustment range can be 4 ℃ or more and the adjustment range can be 0 ℃ or more or 0 ℃ or less), and generally the storage temperature can be set to be between-16 ℃ and +4 ℃ in the range of refrigeration, soft freezing (typically, -4 to 0 ℃) and freezing temperature.
The rear plate of the barrel 110 may be spaced from the rear wall of the temperature change compartment 220 to facilitate air within the temperature change compartment 220 to enter the thawing apparatus 100. The lateral side plates of the cylinder 110 may be spaced from the lateral side walls of the temperature changing compartment 220 to facilitate the discharge of the gas from the thawing apparatus 100 into the temperature changing compartment 220. When the refrigerator 10 is a direct-cooling refrigerator, the rear wall of the temperature changing compartment 220 is the rear wall of the liner thereof; when the refrigerator 10 is an air-cooled refrigerator, the rear wall of the temperature changing compartment 220 is the front surface of the inner air duct cover plate thereof. In some preferred embodiments, the distance between the rear plate and the lateral side plates of the cylinder 110 and the rear wall and the lateral side walls of the corresponding temperature change compartment 220 may be 2-3 mm, such as 2mm, 2.5mm or 3mm, to ensure that the thawing chamber 114 has a large effective volume while ensuring that the thawing apparatus 100 has an appropriate air intake and outlet.
In some embodiments, the refrigerator 10 according to the present invention may be an air-cooled refrigerator, and the temperature change compartment 220 may include an air duct cover. The air duct cover plate is clamped with the rear wall of the inner container of the temperature changing chamber 220 to form a temperature changing air duct, and a temperature changing air inlet is formed in the air duct cover plate and used for providing cold energy for the temperature changing chamber 220.
In some preferred embodiments, the device air inlet 115 of the thawing device 100 and the temperature swing air inlet may be connected by a connection tube to facilitate cooling the thawing chamber 114 of the thawing device 100. In other preferred embodiments, the projection of the device air inlet 115 of the thawing device 100 in the thickness direction of the back plate of the cylinder 110 may be within the temperature varying air inlet to facilitate cooling the thawing chamber 114 of the thawing device 100.
In some embodiments, a defrost switch 224 may be provided on any one of the compartment doors for controlling the start or stop of the defrost process. The rf generation module 130 may be configured to begin operation when the defrost switch 224 is open; when the defrost switch 224 is closed, the operation is stopped. During the thawing process, the user may terminate the thawing process by closing the thawing switch 224. A buzzer (not shown) can be arranged on any one of the compartment doors for prompting the user that the object to be treated is thawed. The buzzer may be configured to start operation when the detection module 150 determines that thawing of the object to be treated is completed (when the rate of change of the dielectric constant of the object to be treated is reduced to or below the second rate threshold); when the object to be treated is taken out of the thawing chamber 114, the operation is stopped. An infrared sensor may be provided on an inner wall of the thawing chamber 114 to sense whether the subject to be treated is placed in the thawing chamber 114. In some preferred embodiments, the refrigeration system of the refrigerator 10 may be configured to stop providing cold to the receiving space provided with the thawing device 100 when the thawing switch 224 is opened; when the thawing switch 224 is closed, the receiving space in which the thawing device 100 is disposed may be controllably provided with cold (i.e., an original refrigerating process of the refrigerator 10 is operated) to reduce the influence of the refrigerating system of the refrigerator 10 on the temperature of the thawing chamber 114 when the thawing device 100 thaws the object to be treated. Wherein the refrigeration system of the refrigerator 10 may include a compressor, a condenser, a capillary tube, and an evaporator for providing cold.
Fig. 7 is a schematic structural view of the compressor compartment 240 in fig. 6. Referring to fig. 7, the cabinet 200 of the refrigerator 10 further defines a compressor compartment 240. The compressor compartment 240 may include a main control panel 243 for controlling the operation of the refrigerator 10, a compressor 241, a condensed water collecting structure 244, and an external power cord (not shown) for supplying power to the operation of the refrigerator 10, which are sequentially disposed. In some embodiments, the refrigerator 10 may further include a power module 242 for powering the radio frequency generation module 130. The power module 242 may be disposed within the compressor compartment 240 of the refrigerator 10 to facilitate heat dissipation and maintenance of the power module 242. The rear plate of the barrel 110 may be provided with a second wire passing port 116, so that the secondary power supply module 242 is electrically connected with the radio frequency generating module 130 through the second wire passing port 116. The power module 242 may be secured to an upper wall of the compressor compartment 240 to facilitate electrical connection of the rf generation module 130 to the power module 242. In some embodiments, the power module 242 may be a DCDC converter. The DCDC converter may be provided to be electrically connected with the main control board 243 to supply power to the thawing apparatus 100. The DCDC converter may be disposed between the main control board 243 and the compressor 241, so that the electric connection between the DCDC converter and the main control board 243 is more convenient. In other embodiments, the power module 242 may be an ACDC converter. The ACDC converter may be configured to be electrically connected to an external power source of the refrigerator 10. It will be appreciated by those skilled in the art that it is easy to connect the various components of the defrosting apparatus 100 to the control circuit of the refrigerator 10.
Fig. 8 is a flowchart of a defrosting method for the refrigerator 10 according to one embodiment of the present invention. Referring to fig. 8, the thawing method of the refrigerator 10 of the present invention may include the steps of:
step S802: judging whether the thawing switch 224 is turned on, if so, executing step S804; if not, go to step S802.
Step S804: the power module 242 begins operation.
Step S806: judging whether the device door 120 is closed, if so, executing step S808; if not, go to step S806. In this step, the open/close state of the device door 120 can be detected by the door opening detection device. The door opening detection device can detect by using a fan-shaped switch, a magnetic sensitive switch, a hall switch and the like, and generate different electric signals when the device door 120 is completely closed or opened, so as to indicate the state of the device door 120.
Step S808: the refrigerating system stops supplying cold to the receiving space provided with the thawing device 100, the rf generating module 130 generates an rf signal of 40-42 MHz, and the detecting module 150 detects an incident wave signal and a reflected wave signal of an electrical connection line connecting the rf generating module 130 and the upper electrode plate 140 a. Step S810 and step S811 are operated. In this step, the thawing apparatus 100 is disposed in the temperature-varying compartment 220, and the rf generation module 130 generates an rf signal of 40.68 MHz.
Step S810: the voltage and current of the incident wave signal and the voltage and current of the reflected wave signal are obtained, and the change rate delta epsilon/delta t of the dielectric coefficient of the object to be treated is calculated.
Step S812: judging whether the change rate delta epsilon/delta t of the dielectric coefficient of the object to be treated is greater than or equal to a first rate threshold, if so, executing step S814; if not, step S810 is performed.
Step S814: the operating power of the rf generation module 130 is reduced by 30% -40%. In this step, the operating power of the rf generation module 130 may be reduced by 35%.
Step S816: the voltage and current of the incident wave signal and the voltage and current of the reflected wave signal are obtained, and the change rate delta epsilon/delta t of the dielectric coefficient of the object to be treated is calculated.
Step S818: judging whether the change rate delta epsilon/delta t of the dielectric coefficient of the object to be treated is smaller than or equal to a second rate threshold value, if so, executing step S820; if not, go to step S816.
Step S820: the power module 242 stops operating, the defrost switch 224 is reset (i.e., turned off), the original cooling program of the refrigerator 10 is run, and the buzzer starts operating.
Step S822: judging whether the object to be processed is taken out from the thawing chamber 114, if so, executing step S824; if not, the method comprises the steps of; step S822 is performed.
Step S824: the buzzer stops working.
Step S811: acquiring voltage of incident wave signalAnd the current and the voltage and current of the reflected wave signal, the load impedance Z of the RF generation module 130 is calculated 2 。
Step S813: judging the load impedance Z of the RF generating module 130 2 And output impedance Z 1 If the difference is smaller than the first impedance threshold, step S815 is performed; if not, go to step S817.
Step S815: the motor of the load compensation module 160 operates to increase the impedance of the compensation unit. Returning to step S811.
Step S817: judging the load impedance Z of the RF generating module 130 2 And output impedance Z 1 If the difference is greater than the second impedance threshold, executing step S819; if not, go to step S811.
Step S819: the motor of the load compensation module 160 operates to reduce the impedance of the compensation unit. Returning to step S811.
As will be understood by those skilled in the art, when the program goes to step S820, the power supply module 242 stops working, i.e. stops supplying power, and the radio frequency generating module 130, the detecting module 150 and the load compensating module 160 all stop working, i.e. when the rate of change Δε/Δt of the dielectric constant of the object to be treated drops to or below the second rate threshold, the detecting module 150 stops detecting the incident wave signal and the reflected wave signal of the electrical connection connecting the radio frequency generating module 130 and the upper electrode plate 140a, and the load compensating module 160 stops working.
A thawing workflow of the refrigerator 10 of one embodiment of the present invention may include: when the user opens the thawing switch 224 and the device door 120 is closed, the power supply module 242 starts to supply power, the refrigerating system of the refrigerator 10 stops providing cold to the accommodating space provided with the thawing device 100, the rf generating module 130 generates an rf signal of 40.68MHz, and the detecting module 150 and the load compensating module 160 start to operate. The detection module 150 detects an incident wave signal and a reflected wave signal of an electrical connection line connecting the rf generation module 130 and the upper electrode plate 140a, and calculates a load impedance Z of the rf emission device 130 2 And a rate of change of dielectric constant Δε/Δt. When the change rate delta epsilon/delta t of the dielectric coefficient of the object to be treated is more than or equal to the first rate threshold value, the radio frequencyThe operating power of the generating module 130 is reduced by 35%, and at the same time, the load impedance Z of the RF generating module 130 is reduced during the whole thawing operation 2 And output impedance Z 1 When the difference is smaller than the first impedance threshold or larger than the second impedance threshold, the load compensation module 160 adjusts the impedance of the compensation unit through the motor, thereby adjusting the load impedance Z of the radio frequency generation module 130 2 The load impedance Z of the RF generating module 130 is made 2 And output impedance Z 1 The difference is always greater than or equal to the first impedance threshold and less than or equal to the second preset threshold. When the change rate delta epsilon/delta t of the dielectric coefficient of the object to be treated is smaller than or equal to the second rate threshold, the power supply module 242 stops supplying power, the original refrigeration program of the refrigerator 10 is operated, the radio frequency generation module 130, the detection module 150 and the load compensation module 160 stop working, and the buzzer starts working. When the user takes out the object to be treated from the defrosting chamber 114, the buzzer stops working.
By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.
Claims (9)
1. A thawing apparatus, comprising:
a barrel defining a defrosting chamber therein having a forward opening for placing an object to be treated;
the device door body is arranged at the forward opening of the defrosting chamber and is used for opening and closing the defrosting chamber;
the radio frequency generation module is configured to generate radio frequency signals; and
the upper electrode plate and the lower electrode plate are respectively and horizontally arranged at the top wall and the bottom wall of the thawing chamber and are respectively and electrically connected with the radio frequency generation module so as to generate radio frequency waves with corresponding frequencies in the thawing chamber according to the radio frequency signals and defrost objects to be treated in the thawing chamber; wherein the method comprises the steps of
A vertical partition plate extending from the top plate of the cylinder body to the bottom plate of the cylinder body along the vertical direction and the transverse direction is arranged in the cylinder body; the radio frequency generation module is arranged between the vertical partition plate and the rear plate of the cylinder body, and the thawing chamber is arranged at the front side of the vertical partition plate; and the radio frequency generation module is configured to:
when the change rate of the dielectric coefficient of the object to be treated is greater than or equal to a first rate threshold, the working power of the object to be treated is reduced by 30% -40%, so that the object to be treated is prevented from being excessively thawed; and/or
And stopping working when the change rate of the dielectric coefficient of the object to be treated is reduced to be less than or equal to a second rate threshold, wherein the temperature corresponding to the second rate threshold is less than 0 ℃.
2. The thawing device as defined in claim 1, wherein
The rear plate of the cylinder body is provided with a device air inlet, and the vertical partition plate is provided with a defrosting air inlet, so that air outside the defrosting device enters the defrosting chamber through the device air inlet and the defrosting air inlet; and is also provided with
And the side plates at the two lateral sides of the defrosting chamber are provided with device air outlets, so that the air in the defrosting chamber is discharged out of the defrosting device through the device air outlets.
3. The thawing device as defined in claim 2, wherein
The device air inlet and the thawing air inlet are respectively arranged on two lateral sides of the radio frequency generation module, so that heat dissipation of the radio frequency generation module is facilitated.
4. The thawing device of claim 1, further comprising:
the tray is arranged in the thawing chamber and used for bearing the object to be treated; and is also provided with
The tray is configured to controllably move in a depth direction of the thawing chamber to facilitate placement and removal of the treatment object.
5. The thawing device as defined in claim 4, wherein
The distance between the lower surface of the tray and the lower electrode plate is 8-12 mm, so that friction between the tray and the lower electrode plate is prevented in the moving process.
6. The thawing device of claim 1, further comprising:
the detection module is configured to detect an incident wave signal and a reflected wave signal of an electric connection line connecting the radio frequency generation module and the upper electrode plate, and calculate the change rate of the dielectric coefficient of the object to be processed according to the voltage and the current of the incident wave signal and the voltage and the current of the reflected wave signal.
7. The thawing device as defined in claim 6, wherein the cartridge further comprises:
the horizontal partition plate is arranged to extend forwards from the vertical partition plate along the horizontal direction, and the detection module is arranged between the horizontal partition plate and the top plate of the cylinder body; and is also provided with
The upper electrode plate is arranged on the lower surface of the horizontal partition plate, and the lower electrode plate is arranged on the upper surface of the bottom plate of the cylinder body.
8. A refrigerator comprising a cabinet defining at least one accommodation space and the thawing device according to any one of claims 1-7, which is provided in one of the accommodation spaces.
9. The refrigerator of claim 8, the housing further defining a compressor compartment for housing a compressor, wherein the refrigerator further comprises:
and the power supply module is arranged in the compressor chamber and is used for supplying power to the radio frequency generation module.
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| WO2019202953A1 (en) * | 2018-04-18 | 2019-10-24 | パナソニックＩｐマネジメント株式会社 | Refrigerator |
| CN112556294B (en) * | 2019-09-25 | 2023-12-22 | 博西华电器（江苏）有限公司 | Heating device and refrigerator comprising same |
| CN215113424U (en) * | 2020-12-02 | 2021-12-10 | 海信（山东）冰箱有限公司 | A kind of refrigerator |
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| CN105486004A (en) * | 2016-02-18 | 2016-04-13 | 合肥华凌股份有限公司 | Air flue structure and refrigerator |
| CN106288626A (en) * | 2016-08-29 | 2017-01-04 | 合肥华凌股份有限公司 | A kind of thawing apparatus, refrigerator and unfreezing control method thereof |
| KR20170043230A (en) * | 2015-10-13 | 2017-04-21 | 삼성전자주식회사 | Cooking apparatus and control method thereof |
| CN207095160U (en) * | 2017-06-06 | 2018-03-13 | 青岛海尔股份有限公司 | Thawing apparatus and the refrigerator with the thawing apparatus |
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| US11284742B2 (en) * | 2015-09-01 | 2022-03-29 | Illinois Tool Works, Inc. | Multi-functional RF capacitive heating food preparation device |
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| KR20170043230A (en) * | 2015-10-13 | 2017-04-21 | 삼성전자주식회사 | Cooking apparatus and control method thereof |
| CN105486004A (en) * | 2016-02-18 | 2016-04-13 | 合肥华凌股份有限公司 | Air flue structure and refrigerator |
| CN106288626A (en) * | 2016-08-29 | 2017-01-04 | 合肥华凌股份有限公司 | A kind of thawing apparatus, refrigerator and unfreezing control method thereof |
| CN207095160U (en) * | 2017-06-06 | 2018-03-13 | 青岛海尔股份有限公司 | Thawing apparatus and the refrigerator with the thawing apparatus |
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Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER JOINT STOCK Co.,Ltd. |
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