WO2018223938A1 - 用于解冻装置的解冻方法 - Google Patents
用于解冻装置的解冻方法 Download PDFInfo
- Publication number
- WO2018223938A1 WO2018223938A1 PCT/CN2018/089860 CN2018089860W WO2018223938A1 WO 2018223938 A1 WO2018223938 A1 WO 2018223938A1 CN 2018089860 W CN2018089860 W CN 2018089860W WO 2018223938 A1 WO2018223938 A1 WO 2018223938A1
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- WIPO (PCT)
- Prior art keywords
- defrosting
- radio frequency
- impedance
- thawing
- generating module
- Prior art date
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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
- H05B6/62—Apparatus for specific applications
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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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/006—Defroster control with electronic control circuits
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/36—Freezing; Subsequent thawing; Cooling
- A23L3/365—Thawing subsequent to freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- 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
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
- H05B6/688—Circuits for monitoring or control for thawing
Definitions
- the present invention relates to the field of thawing, and in particular to a thawing method for a thawing apparatus.
- the quality of the food is maintained during the freezing process, but the frozen food needs to be thawed before processing or eating.
- the prior art generally thaws food by providing a heating device or a microwave device in the refrigerator.
- the thawed food by the heating device generally requires a long thawing time, and the thawing time and temperature are difficult to grasp, which easily causes the water evaporation and juice loss of the food, and the quality of the food is lost; the food is thawed by the microwave device.
- Fast and efficient so the nutrient loss of food is very low, but due to the difference in the penetration and absorption of water and ice by microwave, and the internal distribution of food is uneven, the melted area absorbs more energy and is prone to thaw. Uneven and local overheating problems.
- a thawing method for a thawing device that has high thawing efficiency, uniform thawing, and food quality.
- a further object of the first aspect of the invention is to increase the thawing efficiency of the thawing apparatus.
- Another further object of the first aspect of the invention is to prevent the object to be treated from being decomposed.
- the present invention provides a defrosting method for a defrosting device, the defrosting device comprising a cylinder defining a defrosting chamber for placing a workpiece to be treated and having a forward opening, disposed in the defrosting chamber a device door for opening and closing the defrosting chamber at the forward opening, a radio frequency generating module, and horizontally disposed at a top wall and a bottom wall of the defrosting chamber, respectively, and respectively electrically connected to the radio frequency generating module a connected upper electrode plate and a lower electrode plate;
- the thawing method includes:
- the radio frequency generating module generates a radio frequency signal with a frequency range of 40 to 42 MHz;
- the upper electrode plate and the lower electrode plate generate radio frequency waves of corresponding frequencies in the defrosting chamber according to the radio frequency signal, and thaw the objects to be processed in the defrosting chamber.
- the radio frequency signal is a fixed frequency preset in a range of 40.48-40.68 MHz.
- the thawing device further includes a detecting module configured to detect an incident wave signal and a reflected wave signal connecting the electrical connection between the radio frequency generating module and the upper electrode plate;
- the defrosting method includes :
- the thawing device further includes a load compensation module, the load compensation module includes a compensation unit disposed in series with the object to be processed, and a motor for increasing or decreasing an impedance of the compensation unit;
- the thawing method includes:
- the load compensation module operates
- the load compensation module does not work.
- the step of working by the load compensation module includes:
- the difference between the load impedance and the output impedance of the RF generating module is greater than the second impedance threshold, reducing the impedance of the compensation unit.
- control method for the thawing device comprises:
- the step of determining a thawing progress of the to-be-processed object includes:
- the operating power of the radio frequency generating module is reduced by 30% to 40%.
- the step of determining a thawing progress of the to-be-processed object includes:
- the radio frequency generating module stops working.
- a defrosting method for a refrigerator including a casing defining at least one accommodating space, a compartment door body for opening and closing the accommodating space, respectively, and A defrosting device for the accommodating space, the thawing method comprising the defrosting method for the defrosting device according to any of the above.
- the refrigerator further includes a power supply module for supplying power to the defrosting device, and any one of the compartment door bodies is provided with a defrosting switch for controlling start and stop of the defrosting program; wherein the refrigerator is used for the refrigerator Thawing methods include:
- the radio frequency wave using the frequency range of the present application has a shorter thawing time, a higher temperature uniformity, and a lower juice loss rate than the radio frequency wave of other frequencies, and is particularly suitable for use.
- the thawing device For the thawing device.
- the present invention further improves the waiting for the difference between the load impedance and the output impedance of the radio frequency generating module by a load compensation module within a predetermined range (greater than or equal to a first impedance threshold and less than or equal to a second impedance threshold). The thawing efficiency of the treatment.
- the present invention determines the rate of change of the dielectric coefficient of the object to be processed by the detecting module to determine the thawing progress of the object to be processed.
- the temperature of the object to be treated is already high (ie, the temperature of the object to be treated is greater than or equal to -7 ° C)
- the thermal effect is significantly attenuated, so that the object to be treated is not decomposed. .
- the RF thawing power is large, for example, greater than 100 W.
- the inventors of the present application have creatively recognized that when the temperature of the object to be treated is already high, the operating power of the radio frequency generating module is reduced by 30 to 40%, which can effectively prevent the object to be treated from being decomposed. Further, the present invention determines whether the defrosting is completed by the rate of change of the dielectric coefficient of the object to be treated. Compared with the prior art, by sensing the temperature of the object to be processed, it is judged whether the thawing is completed, and the judgment is more accurate, and the refusal can be further prevented.
- the treated material is decomposed, and the test indicates that the temperature of the object to be treated which is thawed by the thawing device of the present invention is generally -4 to -2 ° C when the thawing is completed, and it is possible to prevent the blood from being thawed when the object to be treated is meat.
- FIG. 1 is a schematic structural view of a defrosting apparatus according to an embodiment of the present invention.
- Figure 2 is a schematic cross-sectional view taken along line A-A of Figure 1;
- Figure 3 is a schematic structural view of the thawing apparatus of Figure 1, wherein the apparatus door of the defrosting apparatus is removed to show the internal structure of the cylinder;
- FIG. 4 is a graph showing a rate of change of a dielectric coefficient of an object to be processed according to an embodiment of the present invention
- Figure 5 is a flow chart of a defrosting method for a defrosting device in accordance with one embodiment of the present invention
- FIG. 6 is a flow chart of a method of acquiring load impedance of a radio frequency generating module according to an embodiment of the present invention
- FIG. 7 is a flow chart of a method of determining whether a load compensation module is operating, in accordance with one embodiment of the present invention.
- FIG. 8 is a flowchart of a method of determining a thawing progress of an object to be processed according to an embodiment of the present invention
- FIG. 9 is a schematic structural view of a refrigerator in which all outer door bodies of the refrigerator are removed to show a compartment structure in a cabinet of the refrigerator according to an embodiment of the present invention.
- Figure 10 is a schematic cross-sectional view of the refrigerator shown in Figure 9;
- Figure 11 is a schematic structural view of the compressor chamber of Figure 10;
- Figure 12 is a detailed flow chart of a defrosting method for a refrigerator in accordance with one embodiment of the present invention.
- the thawing apparatus 100 may include a barrel 110, a device door 120, a radio frequency generating module 130, and an upper electrode plate 140a and a lower electrode plate 140b.
- the barrel 110 can include a top plate, a bottom plate, a back plate, and two opposing lateral side plates, which can define a defrosting chamber 114 having a forward opening for placing the object to be treated.
- the device door 120 may be disposed at a forward opening of the defrosting chamber 114 for opening or closing the defrosting chamber 114.
- the device door 120 can be mounted to the barrel 110 by a suitable method, such as a left open door, a right open door, or an upper open door.
- the RF generation module 130 can be configured to generate a radio frequency signal (generally referred to as a radio frequency signal having a frequency between 300 KHz and 300 GHz).
- the upper electrode plate 140a and the lower electrode plate 140b are respectively horizontally disposed at the top wall and the bottom wall of the defrosting chamber 114, and are respectively electrically connected to the radio frequency generating module 130 to be in the defrosting cavity according to the radio frequency signal generated by the radio frequency generating module 130.
- a radio frequency wave of a corresponding parameter is generated in the chamber 114, and the object to be treated placed in the defrosting chamber 114 is thawed.
- the upper electrode plate 140a is a transmitting antenna; the lower electrode plate 140b is a receiving antenna.
- the upper electrode plate 140a and the lower electrode plate 140b may be electrically connected to the radio frequency generating module 130, respectively, using a 50 ohm electrical connection.
- the defrosting device 100 can also include a detection module 150.
- the detecting module 150 can be configured to detect an incident wave signal and a reflected wave signal connecting the electrical connection between the RF generating module 130 and the upper plate, and calculate the RF according to the voltage and current of the incident wave signal and the voltage and current of the reflected wave signal.
- the load impedance of module 130 occurs. The load impedance is calculated as follows:
- SWR is the standing wave ratio
- Z 1 is the output impedance
- Z 2 is the load impedance
- U 1 is the incident wave voltage
- I 1 is the incident wave current
- R 1 is Output resistance
- X 1 is the output reactance
- U 2 is the reflected wave voltage
- I 2 is the reflected wave current
- R 2 is the load resistance
- X 2 is the load reactance
- the thawing device 100 can also include a load compensation module 160.
- the load compensation module 160 can include a compensation unit and a motor for adjusting the load of the compensation unit.
- the compensation unit may be arranged in series with the object to be processed, that is, the load impedance of the RF generating module 130 is the sum of the impedance of the object to be processed and the impedance of the compensation unit.
- Controlled motors may be configured to increase or decrease the load compensation unit, thereby increasing or decreasing the occurrence of radio frequency load impedance Z 2 of the module 130, and a radio frequency of occurrence of load impedance Z 2 module 130 and the output impedance Z 1 of
- the difference ie, the value obtained by subtracting the output impedance Z 1 from the load impedance Z 2
- the first impedance threshold is less than the second impedance threshold to improve the object to be processed. Thawing efficiency.
- the load compensation module can be configured such that the absolute value of the difference between the load impedance Z 2 of the RF generation module 130 and the output impedance Z 1 is less than 5% of the output impedance Z 1 throughout the thawing process, for example, can be an output 1%, 3% or 5% of the impedance Z 1 .
- the detecting module 150 can be configured to further calculate a dielectric constant of the object to be processed and a rate of change of the dielectric coefficient according to the load impedance Z 2 of the radio frequency generating module 130.
- the formula for calculating the dielectric constant of the object to be treated is as follows:
- 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 140b
- ⁇ is the dielectric constant of the object to be processed
- K is an electrostatic constant
- d is the thickness of the upper plate
- S is the area of the upper plate.
- the rate of change of the dielectric constant of the object to be treated can be obtained by calculating the change value ⁇ of the dielectric coefficient ⁇ per unit time ⁇ t, wherein the unit time ⁇ t can be 0.1 second to 1 second, for example, 0.1 second, 0.5 second or 1 second.
- 4 is a graph showing a rate of change of a dielectric constant of an object to be processed according to an embodiment of the present invention (the ordinate is a rate of change of the dielectric coefficient of the object to be processed ⁇ / ⁇ t; and the abscissa is a thawing time of the object to be processed t , the unit is min). Referring to FIG.
- the radio frequency generating module 130 can be configured to reduce the operating power by 30% to 40% when the rate of change ⁇ / ⁇ t of the dielectric coefficient of the object to be processed is greater than or equal to the first rate threshold. For example, 30%, 35% or 40% to prevent the object to be treated from being excessively thawed (as understood by those skilled in the art, the temperature of excessively thawed to be treated is greater than 0 °C).
- the first predetermined threshold may be 15-20, such as 15, 17, 18 or 20.
- the radio frequency generation module 130 may be further configured to stop the operation when the rate of change ⁇ / ⁇ t of the dielectric coefficient of the object to be processed falls below a second rate threshold.
- the second preset threshold may be 1 to 2, such as 1, 1.5 or 2.
- the dielectric constant of the object to be treated also changes, which is well known to those skilled in the art, but the dielectric constant is usually measured by a dedicated instrument (for example, a dielectric coefficient tester).
- the special instrument takes up a lot of space and costs, and is not suitable for a small-sized thawing device.
- the invention detects the incident wave signal and the reflected wave signal of the electrical connection connecting the radio frequency generating module 130 and the upper plate, and calculates the dielectric coefficient of the object to be processed, which has small occupied space and low cost, and is particularly suitable for the thawing device. .
- the present invention determines the rate of change of the dielectric coefficient of the object to be processed by the detecting module 150 to determine the thawing progress of the object to be processed.
- the thermal effect is significantly attenuated, so that the object to be treated is not decomposed. .
- the RF thawing power is large, for example, greater than 100 W.
- the inventors of the present application have creatively recognized that when the temperature of the object to be treated is already high, the operating power of the radio frequency generating module 130 is reduced by 30 to 40%, which can effectively prevent the object to be treated from being decomposed. Further, the present invention determines whether the defrosting is completed by the rate of change of the dielectric coefficient of the object to be treated. Compared with the prior art, by sensing the temperature of the object to be processed, it is judged whether the thawing is completed, and the judgment is more accurate, and the refusal can be further prevented.
- the treated material is decomposed, and the test indicates that the temperature of the object to be treated which is thawed by the thawing device of the present invention is generally -4 to -2 ° C when the thawing is completed, and it is possible to prevent the blood from being thawed when the object to be treated is meat.
- Fig. 2 is a schematic cross-sectional view taken along line A-A of Fig. 1.
- the cylinder 110 may further include a vertical partition 111 and a horizontal partition 112 for defining an inner space of the cylinder 110.
- the vertical partition 111 may be disposed to extend from the top plate of the cylinder 110 in the vertical direction to the bottom plate of the cylinder 110.
- the radio frequency generating module 130 may be disposed between the vertical partition 111 and the rear plate of the cylinder 110.
- the horizontal partition 112 may be disposed to extend forward from the vertical partition 111 in the horizontal direction.
- 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.
- the thawing chamber 114 may be enclosed by a vertical partition 111, a horizontal partition 112, and a bottom plate of the cylinder 110 and two lateral side panels.
- the upper electrode plate 140a may be disposed on a lower surface of the horizontal partition plate 112, and the lower electrode plate 140b may be disposed on an upper surface of the bottom plate of the cylindrical body 110.
- the vertical partition 111 may be provided with a first through port 1112 to electrically connect the radio frequency generating module 130 to the upper electrode plate 140a via the first through port 1112.
- the barrel 110 may further include a baffle 113 extending upward from the front side end of the horizontal partition 112 in the vertical direction to the top plate of the cylinder 110 to prevent the detection module 150 and the load compensation module 160 from being exposed, reducing the defrosting device 100. Aesthetics.
- the rear plate of the cylinder 110 may be provided with a device air inlet 115
- the vertical partition 111 of the rear side of the defrosting chamber 114 may be provided with a thawing air inlet 1111 to allow air outside the defrosting device 100 to pass through
- the device air inlet 115 and the defrosting air inlet 1111 enter the defrosting chamber 114 of the defrosting device 100.
- the side plates on the lateral sides of the thawing chamber 114 may be provided with a device air outlet 118 to allow the gas in the defrosting chamber 114 to be discharged to the outside of the defrosting device 100 via the device air outlet 118.
- the device air inlet 115 and the defrosting air inlet 1111 of the defrosting device 100 are respectively disposed on lateral sides of the radio frequency generating module 130 to facilitate heat dissipation of the radio frequency generating module 130. In some alternative embodiments, the device air inlet 115 and the defrosting air inlet 1111 of the defrosting device 100 may be disposed on the same side of the radio frequency generating module 130.
- the present invention provides a device air inlet 115 and a device air outlet 118 on the defrosting device 100.
- the defrosting chamber 114 can be used to place the food material, so that the storage space in the defrosting device 100 can be fully utilized. .
- the thawing device 100 can also include a tray 170.
- the tray 170 is disposed in the defrosting chamber 114, and the object to be treated is placed on the tray 170.
- the tray 170 can be configured to be controllably moved in the depth direction of the defrosting chamber 114 to facilitate placement and removal of the object to be treated.
- the lower surface of the tray 170 may be spaced from the lower electrode plate 140b by a distance of 8 to 12 mm, such as 8 mm, 10 mm, 12 mm, to prevent friction with the lower electrode plate 140b during the pulling of the tray 170. .
- Fig. 3 is a schematic structural view of the thawing apparatus of Fig. 1 in which the apparatus door of the defrosting apparatus is removed to show the internal structure of the cylinder.
- the barrel 110 and the device door 120 can be provided with electromagnetic shielding features 117, respectively.
- the electromagnetic shielding feature 117 disposed on the barrel 110 and the electromagnetic shielding feature 117 disposed on the device door 120 are electrically connected to reduce the amount of magnetic leakage outward of the defrosting device 100 when the device door 120 is closed.
- the electromagnetic shielding feature 117 may be a conductive coating applied to the inner wall of the cylinder 110 and the inner surface of the device door 120 (facing the surface of the cylinder 110), abutting against the inner wall of the cylinder 110, and inside the device door 120.
- the thawing device 100 can also include an elastic conductive loop 180.
- the elastic conductive ring 180 can be disposed at the periphery of the forward opening of the defrosting chamber 114 to cause squeezing deformation when the device door 120 is closed, and closely fits the device door 120, that is, the elastic conductive ring 180 A seal is formed with the device door 120.
- the electromagnetic shielding feature 117 disposed on the barrel 110 and the electromagnetic shielding feature 117 disposed on the device door 120 may be respectively disposed in conductive contact with the elastic conductive ring 180 to reduce the defrosting device 100 outward when the device door 120 is closed. The amount of magnetic leakage.
- the elastomeric conductive collar 180 can be made of silicone, silicone fluoride, EPDM, fluorocarbon-silicone, and silver plated aluminum.
- the resilient conductive ring 180 can be a hollow annular structure to closely conform to the device door 120 when the device door 120 is closed.
- the flexible conductive ring 180 may have a width of 20 to 30 mm, such as 20 mm, 25 mm or 30 mm, to improve the sealing of the defrosting device 100.
- the device air inlet 115, the defrosting air inlet 1111, and the device air outlet 118 of the defrosting device 100 may each be provided with a conductive metal mesh 190, which may be disposed to be electromagnetically shielded from the cylindrical body 110.
- the feature 117 is electrically connected to reduce the amount of magnetic leakage of the defrosting device 100.
- the frequency of the radio frequency signal generated by the radio frequency generating module 130 may be 40 to 42 MHz, for example, 40 MHz, 40.48 MHz, 40.68 MHz, 41 MHz, or 42 MHz, to reduce The thawing time of the material to be treated increases the temperature uniformity of the object to be treated and reduces the rate of juice loss.
- the frequency of the radio frequency wave may be a predetermined fixed frequency in the range of 40.48-40.68 MHz 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. .
- the frequency of the radio frequency wave is 40.68MHz, the thawing effect is the best.
- the power of the RF wave is 100 W, and the structure and the working flow of the thawing device 100 are the same.
- the thawing effect test was performed on the defrosting apparatus 100 provided with the frequencies of the respective examples and the respective comparative examples.
- the thawing time is from the beginning of the thawing, and the thawing device 100 determines the time when the thawing is completed (that is, the RF generating module stops working); the temperature uniformity: after the thawing is completed, the temperature of the four corners and the center point of the beef are respectively measured, and the calculation is performed.
- the difference between the average value of the corners and the temperature of the center point, the temperature uniformity is the ratio of the difference to the average value; the rate of juice loss: the weight before the thawing of the beef and the weight after thawing, and the difference between the two is calculated. Value, juice loss rate is the ratio of this difference to the weight of the beef before thawing.
- Example 5 According to the test results of Example 5 and Comparative Example 1 in Table 2, it can be seen that under the same test conditions, the present invention is applied under the same test conditions, in the case where the power of the radio frequency wave is the same, and the structure and the working flow of the thawing device 100 are the same.
- the thawing device 100 of the RF frequency within the scope of the embodiment has a better thawing effect than the defrosting device 100 using the RF frequency of the prior art, the former having a 20% reduction in thawing time and a 17% increase in temperature uniformity.
- the thawing time of the thawing apparatus 100 of each embodiment of the present invention is less than 20 minutes, the temperature uniformity is below 0.5, and the juice loss rate is below 0.40%.
- the frequency of the radio frequency wave for example, the radio frequency is 40.48 to 40.68 MHz
- the thawing time of the thawing device 100 can be reduced to 18 minutes or less, the temperature uniformity is increased to 0.4 or less, and the juice loss rate is reduced to 0.32% or less.
- FIG. 5 is a flow chart of a thawing method for the defrosting apparatus 100, in accordance with one embodiment of the present invention.
- the defrosting method of the thawing apparatus 100 of the present invention may include the following steps:
- Step S502 The radio frequency generating module 130 generates a radio frequency signal with a frequency range of 40 to 42 MHz.
- Step S504 Acquire a radio frequency signal generated by the radio frequency generating module 130.
- Step S506 The upper electrode plate 140a and the lower electrode plate 140b generate radio frequency waves of corresponding frequencies in the defrosting chamber 114 according to the radio frequency signal, and thaw the objects to be processed placed in the defrosting chamber 114.
- FIG. 6 is a flow diagram of a method of acquiring load impedance Z 2 of radio frequency generation module 130, in accordance with one embodiment of the present invention.
- the method for acquiring the load impedance Z 2 of the radio frequency generating module 130 of the present invention may include the following steps:
- Step S602 Detecting an incident wave signal and a reflected wave signal connecting the electrical connection between the radio frequency generating module 130 and the upper electrode plate 140a.
- Step S604 Acquire voltage and current of the incident wave signal, and voltage and current of the reflected wave signal.
- Step S606 Calculate the load impedance Z 2 of the radio frequency generating module 130.
- FIG. 7 is a flow chart of a method of determining whether a load compensation module 160 is operating, in accordance with one embodiment of the present invention.
- the method for determining whether the load compensation module 160 operates or not may include the following steps:
- Step S702 Acquire a load impedance of the radio frequency generating module 130.
- Step S704 It is determined whether the difference between the load impedance Z 2 of the radio frequency generating module 130 and the output impedance Z 1 is less than the first impedance threshold. If yes, step S706 is performed; if not, step S708 is performed.
- Step S706 The motor of the load compensation module 160 operates to increase the impedance of the compensation unit. Go back to step S702.
- Step S708 It is determined whether the difference between the load impedance Z 2 of the radio frequency generating module 130 and the output impedance Z 1 is greater than the second impedance threshold. If yes, step S710 is performed; if no, step S702 is performed.
- Step S710 The motor of the load compensation module 160 operates to reduce the impedance of the compensation unit. Go back to step S702.
- the method for determining the thawing progress of an object to be processed according to the present invention may include the following steps:
- Step S802 Acquire a load impedance of the radio frequency generating module 130.
- Step S804 Calculating a rate of change ⁇ / ⁇ t of the dielectric constant of the object to be processed.
- Step S806 Obtain a rate of change ⁇ / ⁇ t of the dielectric constant of the object to be processed.
- Step S808 determining whether the rate of change ⁇ / ⁇ t of the dielectric coefficient of the object to be processed is greater than or equal to the first rate threshold, and if yes, executing step S810; if not, executing step S806.
- Step S810 The operating power of the radio frequency generating module 130 is reduced by 30% to 40%. In this step, the operating power of the radio frequency generating module 130 can be reduced by 35%.
- Step S812 Acquire a rate of change ⁇ / ⁇ t of the dielectric constant of the object to be processed.
- Step S814 determining whether the rate of change ⁇ / ⁇ t of the dielectric coefficient of the object to be processed is less than or equal to the second rate threshold, and if yes, executing step S816; if not, executing step S812.
- Step S816 The radio frequency generating module 130 stops working.
- the present invention may also provide a refrigerator 10 based on the defrosting apparatus 100 of any of the foregoing embodiments.
- 9 is a schematic structural view of a refrigerator 10 according to an embodiment of the present invention, in which all outer door bodies of the refrigerator 10 are removed to show a compartment structure in the cabinet 200 of the refrigerator 10;
- FIG. A schematic cross-sectional view of the refrigerator 10 shown in FIG.
- the refrigerator 10 may generally include a cabinet 200 defining at least one receiving space, a compartment door for respectively opening and closing the access opening of each of the receiving spaces, and being disposed in a receiving space. Thawing device 100.
- the number of the accommodation spaces of the refrigerator 10 may be three, which are the refrigerating compartment 210, the variable temperature compartment 220, and the freezing compartment 230, respectively, and are used for opening and closing the refrigerating compartment 210 and the temperature changing compartment, respectively.
- the refrigerating door body 211 of the freezing compartment 230, the temperature changing door body 221, and the freezing door body 231 are provided in the temperature changing compartment 220.
- the refrigerating compartment 210 refers to a storage compartment having a storage temperature of 0 to +8 ° C
- the freezing compartment 230 refers to a storage temperature of the foodstuff.
- the variable temperature compartment 220 means that the storage temperature can be changed over a wide range (for example, the adjustment range can be above 4 ° C, and can be adjusted to above 0 ° C or below 0 ° C)
- the storage compartment generally has a storage temperature that spans refrigeration, soft freezing (typically -4 to 0 °C) and freezing temperature, preferably -16 to +4 °C.
- the refrigerator 10 may be an air-cooled refrigerator, and the temperature change compartment 220 may include a duct cover.
- the air duct cover and the rear inner wall of the temperature change compartment 220 are formed to form a variable temperature air duct, and the air duct cover is provided with a temperature change air inlet for providing cooling capacity to the temperature change compartment 220.
- the device air inlet 215 and the variable temperature air inlet of the thawing device 200 can be connected by a connecting tube to facilitate cooling of the defrosting chamber 114 of the defrosting device 100.
- the projection of the device air inlet 115 of the defrosting device 100 in the thickness direction of the rear plate of the barrel 110 may be within the variable temperature air inlet to facilitate cooling of the defrosting chamber 114 of the defrosting device 100.
- any one of the compartment door bodies may be provided with a defrosting switch 224 for controlling the start or stop of the defrosting procedure.
- the RF generation module 130 can be configured to begin operation when the defrosting switch 224 is open; when the defrosting switch 224 is closed, the operation is stopped. During the thawing process, the user can terminate the defrosting procedure by turning off the defrosting switch 224.
- At least one compartment door may also be provided with a buzzer (not shown) for prompting the user that the object to be treated has been thawed.
- the buzzer may be configured to start working when the detecting module 150 determines that the thawing of the object to be processed is completed (the rate of change of the dielectric coefficient of the object to be treated drops to less than or equal to a second predetermined threshold); when the object to be processed is from the thawing chamber When the chamber 114 is taken out, the operation is stopped.
- the distance between the thawing device 100 and the inner walls on the lateral sides of the accommodating space in which it is disposed may be 2 to 3 mm, for example, 2 mm, 2.5 mm, or 3 mm, so that the gas in the thawing compartment is discharged into the accommodating space.
- the thawing device 100 can be fixed in the accommodating space by an interference fit or a snap fit with the inner wall on the vertical sides of the accommodating space.
- FIG 11 is a schematic structural view of the compressor chamber 241 of Figure 10 .
- the cabinet 200 of the refrigerator 10 also defines a compressor chamber 240.
- the compressor chamber 240 may include a main control board 243, a compressor 241, a condensate collecting structure 244, and an external power supply line (not shown) for controlling the operation of the refrigerator 10, which are sequentially disposed.
- the refrigerator 10 may further include a power supply module 242 for powering the radio frequency generating module 130.
- the power supply module 242 can be disposed in the compressor room 240 of the refrigerator 10 to facilitate heat dissipation and maintenance of the power supply module 242.
- the rear plate of the cylinder 110 may be provided with a second wire opening 116 for electrically connecting from the power supply module 242 to the radio frequency generating module 130 via the second wire opening 116.
- the power supply module 242 can be fixed to the upper wall of the compressor room 240 to facilitate electrical connection between the RF generating module 130 and the power supply module 242.
- the power supply module 242 can be an ACDC converter.
- the ACDC converter can be configured to be electrically coupled to the main control board 243 to power the RF generation module 130.
- the ACDC converter can be disposed between the main control board 243 and the compressor 241 to make the electrical connection of the power supply module 242 and the main control board 243 more convenient. It will be understood by those skilled in the art that it is easy to connect the various components of the defrosting device 100 to the control circuitry of the refrigerator 10.
- FIG. 12 is a detailed flow chart of a defrosting method for the refrigerator 10, in accordance with one embodiment of the present invention.
- the defrosting method of the refrigerator 10 of the present invention may include the following steps:
- Step S1202 It is determined whether the defrosting switch 224 is turned on, and if so, step S1204 is performed; if not, step S1202 is performed.
- Step S1204 The power supply module 242 starts to work, the RF generating module 130 generates a 40-42 MHz RF signal, and the detecting module 150 detects an incident wave signal and a reflected wave signal connecting the electrical connection between the RF generating module 130 and the upper plate 140a.
- the radio frequency generating module 130 generates a radio frequency signal of 40.68 MHz.
- Step S1206 Acquire voltage and current of the incident wave signal and voltage and current of the reflected wave signal, and calculate a rate of change ⁇ / ⁇ t of the dielectric coefficient of the object to be processed.
- Step S1208 determining whether the rate of change ⁇ / ⁇ t of the dielectric coefficient of the object to be processed is greater than or equal to the first rate threshold, and if so, executing step S1210; if not, executing step S1206.
- Step S1210 The operating power of the radio frequency generating module 130 is reduced by 30% to 40%. In this step, the operating power of the radio frequency generating module 130 can be reduced by 35%.
- Step S1212 Acquire voltage and current of the incident wave signal and voltage and current of the reflected wave signal, and calculate a rate of change ⁇ / ⁇ t of the dielectric coefficient of the object to be processed.
- Step S1214 determining whether the rate of change ⁇ / ⁇ t of the dielectric coefficient of the object to be processed is less than or equal to the second rate threshold, and if so, executing step S1216; if not, executing step S1212.
- Step S1216 The power supply module 242 stops working, the defrosting switch 224 is reset (ie, turned off), and the buzzer starts to work.
- Step S1218 determining whether the object to be processed is taken out from the defrosting chamber 114, and if so, executing step S1220; if not; executing step S1216.
- Step S1220 The buzzer stops working.
- step S1204 the following steps are further included:
- Step S1207 Acquire the voltage and current of the incident wave signal and the voltage and current of the reflected wave signal, and calculate the load impedance Z 2 of the radio frequency generating module 130.
- Step S1209 It is determined whether the difference between the load impedance Z 2 of the radio frequency generating module 130 and the output impedance Z 1 is less than the first impedance threshold. If yes, step S1211 is performed; if not, step S1213 is performed.
- Step S1211 The motor of the load compensation module 160 operates to increase the impedance of the compensation unit. The process returns to step S1207.
- Step S1213 It is determined whether the difference between the load impedance Z 2 of the radio frequency generating module 130 and the output impedance Z 1 is greater than the second impedance threshold. If yes, step S1215 is performed; if not, step S1207 is performed.
- Step S1215 The motor of the load compensation module 160 operates to reduce the impedance of the compensation unit.
- the process returns to step S1207.
- the power supply module 242 stops working, that is, the power supply is stopped, and the radio frequency generating module 130, the detecting module 150, and the load compensation module 160 stop working, that is, when the object to be processed
- the detecting module 150 stops detecting the incident wave signal and the reflected wave signal connecting the electrical connection between the radio frequency generating module 130 and the upper plate 140 a, and the load compensation module 160 stopped working.
- a defrosting workflow of the refrigerator 10 may include: when the user turns on the defrosting switch 224, the power supply module 242 starts to supply power, the radio frequency generating module 130 generates a radio frequency signal of 40.68 MHz, and the detecting module 150 and the load compensation module 160 start. jobs.
- the detecting module 150 detects the incident wave signal and the reflected wave signal connecting the electrical connection between the RF generating module 130 and the upper plate, and calculates the load impedance Z 2 of the RF transmitting device 130 and the rate of change ⁇ / ⁇ t of the dielectric coefficient.
- the operating power of the RF generating module 130 is reduced by 35%, and at the same time, the load impedance of the RF generating module 130 is used throughout the thawing workflow.
- the load compensation module 160 adjusts the impedance of the compensation unit by the motor, thereby adjusting the load impedance Z 2 of the RF generating module 130 to generate the RF.
- the difference between the load impedance Z 2 of the module 130 and the output impedance Z 1 is always greater than or equal to the first impedance threshold and less than or equal to the second predetermined threshold.
- the power supply module 242 stops supplying power, and the radio frequency generating module 130, the detecting module 150, and the load compensation module 160 stop working, and the buzzer starts to work.
- the buzzer stops working.
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- Engineering & Computer Science (AREA)
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- Health & Medical Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
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- Electromagnetism (AREA)
- Freezing, Cooling And Drying Of Foods (AREA)
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- Electric Ovens (AREA)
Abstract
Description
Claims (10)
- 一种用于解冻装置的解冻方法,所述解冻装置包括限定有用于放置待处理物并具有前向开口的解冻腔室的筒体、设置于所述解冻腔室的前向开口处的用于开闭所述解冻腔室的装置门体、射频发生模块、以及分别水平地设置于所述解冻腔室的顶壁和底壁处且分别与所述射频发生模块电连接的上电极板和下电极板;所述解冻方法包括:所述射频发生模块产生频率范围为40~42MHz的射频信号;获取所述射频信号;所述上电极板和下电极板根据所述射频信号在所述解冻腔室内产生相应频率的射频波,并解冻所述解冻腔室内的待处理物。
- 根据权利要求1所述的用于解冻装置的解冻方法,其中所述射频信号为在40.48~40.68MHz范围内预设的一固定频率。
- 根据权利要求1所述的用于解冻装置的解冻方法,所述解冻装置还包括检测模块,所述检测模块设置为检测连接所述射频发生模块与所述上电极板的电连线的入射波信号和反射波信号;所述解冻方法包括:检测所述电连线的入射波信号和反射波信号;获取所述入射波信号的电压和电流、以及所述反射波信号的电压和电流;计算所述射频发生模块的负载阻抗。
- 根据权利要求3所述的用于解冻装置的解冻方法,所述解冻装置还包括一负载补偿模块,所述负载补偿模块包括设置为与所述待处理物串联的补偿单元和用于增大或减小所述补偿单元的阻抗的电机;所述解冻方法包括:获取所述射频发生模块的负载阻抗;判断所述射频发生模块的负载阻抗与输出阻抗之差是否大于等于一第一阻抗阈值且小于等于一第二阻抗阈值;其中所述第一阻抗阈值小于所述第二阻抗阈值;若所述射频发生模块的负载阻抗与输出阻抗之差小于所述第一阻抗阈值或大于所述第二阻抗阈值,则所述负载补偿模块工作;若所述射频发生模块的负载阻抗与输出阻抗之差大于等于所述第一阻抗阈值且小于等于所述第二阻抗阈值,则所述负载补偿模块不工作。
- 根据权利要求4所述的用于解冻装置的解冻方法,其中所述负载补偿模块工作的步骤包括:若所述射频发生模块的负载阻抗与输出阻抗之差小于所述第一阻抗阈值,则增大所述补偿单元的阻抗;若所述射频发生模块的负载阻抗与输出阻抗之差大于所述第二阻抗阈值,则减小所述补偿单元的阻抗。
- 根据权利要求3所述的用于解冻装置的解冻方法,包括:获取所述射频发生模块的负载阻抗;计算所述待处理物的介电常数的变化速率;判断所述待处理物的解冻进度。
- 根据权利要求6所述的用于解冻装置的解冻方法,其中所述判断所述待处理物的解冻进度的步骤包括:获取所述待处理物的介电常数的变化速率;判断所述待处理物的介电系数的变化速率是否大于等于第一速率阈值;若是,所述射频发生模块的工作功率降低30%~40%。
- 根据权利要求6所述的用于解冻装置的解冻方法,其中所述判断所述待处理物的解冻进度的步骤包括:获取所述待处理物的介电常数的变化速率;判断所述待处理物的介电系数的变化速率是否下降至小于等于第二速率阈值;若是,所述射频发生模块停止工作。
- 一种用于冰箱的解冻方法,所述冰箱包括限定有至少一个容纳空间的箱体、分别用于开闭所述容纳空间的间室门体和设置于一个所述容纳空间的解冻装置,所述解冻方法包括权利要求1-8中任一项所述的用于解冻装置的解冻方法。
- 根据权利要求9所述的用于冰箱的解冻方法,所述冰箱还包括用于为所述解冻装置供电的供电模块,且任一所述间室门体上设置有用于控制解冻程序启停的解冻开关;其中所述用于冰箱的解冻方法包括:若所述解冻开关打开,则所述供电模块开始工作;若所述解冻开关关闭,则所述供电模块停止工作。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18814417.4A EP3617620B1 (en) | 2017-06-06 | 2018-06-05 | Defrosting method for defrosting apparatus |
ES18814417T ES2910507T3 (es) | 2017-06-06 | 2018-06-05 | Método de descongelación para aparato de descongelación |
PL18814417T PL3617620T3 (pl) | 2017-06-06 | 2018-06-05 | Sposób rozmrażania dla urządzenia do rozmrażania |
AU2018280465A AU2018280465B2 (en) | 2017-06-06 | 2018-06-05 | Thawing method for thawing device |
US16/706,147 US11473829B2 (en) | 2017-06-06 | 2019-12-06 | Thawing method for thawing device |
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CN201710418935.5A CN108991338B (zh) | 2017-06-06 | 2017-06-06 | 用于解冻装置的解冻方法 |
CN201710418935.5 | 2017-06-06 |
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US16/706,147 Continuation US11473829B2 (en) | 2017-06-06 | 2019-12-06 | Thawing method for thawing device |
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WO2018223938A1 true WO2018223938A1 (zh) | 2018-12-13 |
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US (1) | US11473829B2 (zh) |
EP (1) | EP3617620B1 (zh) |
CN (1) | CN108991338B (zh) |
AU (1) | AU2018280465B2 (zh) |
ES (1) | ES2910507T3 (zh) |
PL (1) | PL3617620T3 (zh) |
WO (1) | WO2018223938A1 (zh) |
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CN109000407B (zh) * | 2017-06-06 | 2020-05-26 | 青岛海尔股份有限公司 | 冰箱 |
CN111918432B (zh) * | 2019-05-07 | 2023-02-17 | 青岛海尔智能技术研发有限公司 | 射频加热设备 |
CN114521033A (zh) * | 2020-11-20 | 2022-05-20 | 青岛海尔特种电冰箱有限公司 | 用于加热装置的控制方法及加热装置 |
CN112577257A (zh) * | 2020-12-23 | 2021-03-30 | 珠海格力电器股份有限公司 | 解冻装置控制方法、控制设备及冰箱 |
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- 2017-06-06 CN CN201710418935.5A patent/CN108991338B/zh active Active
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2018
- 2018-06-05 WO PCT/CN2018/089860 patent/WO2018223938A1/zh unknown
- 2018-06-05 EP EP18814417.4A patent/EP3617620B1/en active Active
- 2018-06-05 PL PL18814417T patent/PL3617620T3/pl unknown
- 2018-06-05 AU AU2018280465A patent/AU2018280465B2/en active Active
- 2018-06-05 ES ES18814417T patent/ES2910507T3/es active Active
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2019
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Also Published As
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CN108991338B (zh) | 2021-11-26 |
AU2018280465A1 (en) | 2019-12-12 |
EP3617620B1 (en) | 2022-01-26 |
US11473829B2 (en) | 2022-10-18 |
AU2018280465B2 (en) | 2021-04-29 |
EP3617620A1 (en) | 2020-03-04 |
ES2910507T3 (es) | 2022-05-12 |
CN108991338A (zh) | 2018-12-14 |
PL3617620T3 (pl) | 2022-06-13 |
EP3617620A4 (en) | 2020-06-03 |
US20200116417A1 (en) | 2020-04-16 |
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