WO2018223949A1 - 冰箱 - Google Patents

冰箱 Download PDF

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Publication number
WO2018223949A1
WO2018223949A1 PCT/CN2018/089913 CN2018089913W WO2018223949A1 WO 2018223949 A1 WO2018223949 A1 WO 2018223949A1 CN 2018089913 W CN2018089913 W CN 2018089913W WO 2018223949 A1 WO2018223949 A1 WO 2018223949A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
defrosting
radio frequency
generating module
treated
Prior art date
Application number
PCT/CN2018/089913
Other languages
English (en)
French (fr)
Inventor
朱小兵
李鹏
王铭
戴建斌
徐同
Original Assignee
青岛海尔股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 青岛海尔股份有限公司 filed Critical 青岛海尔股份有限公司
Priority to EP18812979.5A priority Critical patent/EP3617618B1/en
Priority to ES18812979T priority patent/ES2913256T3/es
Priority to AU2018280476A priority patent/AU2018280476B2/en
Publication of WO2018223949A1 publication Critical patent/WO2018223949A1/zh
Priority to US16/706,420 priority patent/US11262121B2/en

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Classifications

    • 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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • 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
    • H05B6/50—Circuits for monitoring or control
    • 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
    • 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
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B4/00—General methods for preserving meat, sausages, fish or fish products
    • A23B4/06—Freezing; Subsequent thawing; Cooling
    • A23B4/07—Thawing subsequent to freezing
    • 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
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/121—Sensors measuring the inside temperature of particular compartments

Definitions

  • the present invention relates to the field of thawing, and in particular to a refrigerator having a quick thawing function.
  • 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 further object of the invention is to improve the thawing efficiency of the refrigerator.
  • the present invention provides a refrigerator including a case defining at least one receiving space, a compartment door for respectively opening and closing the at least one receiving space, and a defrosting device disposed in one of the receiving spaces,
  • the thawing device includes:
  • a barrel defining a defrosting chamber having a forward opening, the defrosting chamber for placing a substance to be treated;
  • a device door disposed at a forward opening of the defrosting chamber for opening and closing the defrosting chamber
  • a radio frequency generating module configured to generate a radio frequency signal
  • the upper electrode plate and the lower electrode plate are respectively horizontally disposed at the top wall and the bottom wall of the defrosting chamber, and are respectively electrically connected to the radio frequency generating module to generate in the defrosting chamber according to the radio frequency signal a radio frequency wave of a corresponding frequency, and thawing the object to be treated in the defrosting chamber;
  • Providing at least one temperature sensor on the inner wall of the defrosting chamber configured to sense a temperature of the object to be processed, and adjust an operating power of the radio frequency generating module according to a temperature of the object to be processed to prevent the The material to be treated is excessively thawed.
  • the number of the at least one temperature sensor is three; the three temperature sensors are respectively disposed on two lateral sidewalls and a rear wall of the defrosting chamber; and the temperature of the object to be treated is The average of the temperatures sensed by the three temperature sensors.
  • the three sensors are spaced apart in a vertical direction of the defrosting device.
  • the radio frequency generating module is configured to:
  • the operating power is the rated power
  • the working power is 50-60% of the rated power
  • the working power is 20 to 30% of the rated power
  • the first temperature difference threshold is greater than the second temperature difference threshold.
  • the radio frequency generating module is configured to:
  • the operating power is rated power
  • the operating power is 50-60% of the rated power
  • the operating power is 20 to 30% of the rated power
  • the first temperature rate threshold is greater than the second temperature rate threshold.
  • the refrigerator further includes:
  • a defrosting switch is disposed on any of the compartment door bodies for controlling start and stop of the thawing procedure; and the radio frequency generating module is configured to:
  • the refrigeration system of the refrigerator is configured to:
  • 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, and according to the incident wave signal The voltage and current, and the voltage and current of the reflected wave signal, calculate the load impedance of the RF generating module.
  • 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, and according to the incident wave signal The voltage and current, and the voltage and current of the reflected wave signal, calculate the load impedance of the RF generating module.
  • the thawing device further includes: a load compensation module configured to controllably increase or decrease a load impedance of the radio frequency generating module, and difference between a load impedance and an output impedance of the radio frequency generating module And being greater than or equal to the first impedance threshold and less than or equal to the second predetermined impedance threshold to improve the thawing efficiency of the object to be processed.
  • a load compensation module configured to controllably increase or decrease a load impedance of the radio frequency generating module, and difference between a load impedance and an output impedance of the radio frequency generating module And being greater than or equal to the first impedance threshold and less than or equal to the second predetermined impedance threshold to improve the thawing efficiency of the object to be processed.
  • the detecting module is configured to further calculate a rate of change of a dielectric coefficient of the to-be-processed object according to a load impedance of the radio frequency generating module; and the radio frequency generating module is configured to:
  • the present invention adjusts the real-time working power of the radio frequency generating module by the temperature of the object to be treated, prevents the object to be processed from being excessively thawed, and ensures the quality of the object to be processed.
  • the present invention calculates the load impedance of the radio frequency generating module by detecting the incident wave signal and the reflected wave signal connecting the electrical connection between the radio frequency generating module and the upper plate, and has small occupied space and low cost, and is particularly suitable for the refrigerator.
  • the thawing device in the middle.
  • the load compensation module makes the difference between the load impedance and the output impedance of the RF generating module within a preset range, thereby improving the thawing efficiency of the object to be processed.
  • the present invention determines whether the thawing is completed by the detection module calculating the rate of change of the dielectric coefficient of the object to be processed, and determining whether the thawing is completed or not by comparing the temperature of the object to be processed in the prior art. Further, the object to be treated can be further prevented from being 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, thereby avoiding when the object to be treated is meat. Thawing produces blood.
  • FIG. 1 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 the refrigerator case, according to an embodiment of the present invention
  • Figure 2 is a schematic cross-sectional view of the refrigerator shown in Figure 1;
  • Figure 3 is a schematic partial enlarged view of a region A in Figure 2;
  • Figure 4 is a schematic cross-sectional view taken along line B-B of Figure 3;
  • FIG. 5 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 6 is a schematic structural view of the compressor chamber of Figure 2;
  • Figure 7 is a schematic structural view of the thawing device of Figure 3, wherein the device door of the thawing device is removed to show the internal structure of the cylinder;
  • Figure 8 is a flow chart of a defrosting method for a refrigerator in accordance with one embodiment of the present invention.
  • FIG. 9 is a flow chart of a method for adjusting the operating power of a radio frequency generating module according to the temperature of an object to be processed according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of a method for adjusting an operating power of a radio frequency generating module according to a temperature of an object to be processed according to another embodiment of the present invention
  • FIG 11 is a detailed flow chart of a thawing method for a refrigerator in accordance with one embodiment of the present invention.
  • FIG. 1 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 100 of the refrigerator 10;
  • FIG. 2 is a view A schematic cross-sectional view of the refrigerator 10 shown in Fig. 1;
  • Fig. 3 is a schematic partial enlarged view of a region A in Fig. 2.
  • the refrigerator 10 may generally include a cabinet 100 defining at least one receiving space, a compartment door for respectively opening and closing the pick-and-place ports of the respective receiving spaces, and a housing provided in one receiving space. Thaw device 200.
  • the thawing device 200 may include a barrel 210, a device door body 220, a radio frequency generating module 230, and an upper electrode plate 240a and a lower electrode plate 240b.
  • the barrel 210 can include a top plate, a bottom plate, a back plate, and two opposing lateral side plates, which can define a defrosting chamber 214 having a forward opening for placing the object to be treated.
  • the device door 220 can be disposed at a forward opening of the defrosting chamber 214 for opening or closing the defrosting chamber 214.
  • the device door 220 can be mounted to the barrel 210 by a suitable method, such as a left open door, a right open door, or an upper open door.
  • the RF generation module 230 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 240a and the lower electrode plate 240b are respectively horizontally disposed at the top wall and the bottom wall of the defrosting chamber 214, and are respectively electrically connected to the radio frequency generating module 230 to be in the defrosting cavity according to the radio frequency signal generated by the radio frequency generating module 230.
  • a radio frequency wave of a corresponding parameter is generated in the chamber 214, and the object to be treated placed in the defrosting chamber 214 is thawed.
  • the upper electrode plate 240a is a transmitting antenna; the lower electrode plate 240b is a receiving antenna.
  • the upper electrode plate 240a and the lower electrode plate 240b are electrically connected to the radio frequency generating module 230, respectively, using a 50 ohm electrical connection.
  • At least one temperature sensor 219 may be disposed on the inner wall of the defrosting chamber 214, that is, the number of the temperature sensors 219 may be one, two or more, or the like. Temperature sensor 219 can be configured to sense the temperature of the object to be treated. And adjusting the real-time working power of the radio frequency generating module 230 according to the temperature of the object to be processed to prevent the object to be processed from being decomposed. Compared with the thawing device with a certain thawing power in the prior art, the present invention determines the real-time working power of the radio frequency generating module 230 by the temperature of the object to be processed, prevents the object to be processed from being excessively thawed, and ensures the quality of the object to be processed.
  • the number of temperature sensors 219 can be three.
  • Three temperature sensors 219 are respectively disposed on the lateral two side walls and the rear wall of the defrosting chamber 214.
  • the temperature of the object to be treated is an average of the temperatures sensed by the three temperature sensors 219 to ensure the accuracy of the temperature of the resulting object to be treated.
  • three temperature sensors 219 are spaced apart in the vertical direction of the defrosting device 200 to ensure that the temperature of the object to be treated of different heights can be sensed.
  • three temperature sensors 219 can be disposed at 1/3, 1/2, and 2/3 of the height of the defrosting chamber 214, respectively.
  • the radio frequency generating module 230 can be configured to operate at a rated power when the absolute value of the difference between the temperature of the object to be processed and a predetermined temperature setting is greater than or equal to a first temperature difference threshold;
  • the operating power is 50-60% of the rated power, for example, 50%, 55% or 60. %; when the absolute value of the difference between the temperature of the object to be treated and a predetermined temperature setting is less than the second temperature difference threshold, the operating power is 20 to 30% of the rated power, for example, 20%, 25% or 30%.
  • the first temperature difference threshold is greater than the second temperature difference threshold.
  • the preset temperature setting may be -4 to -2 °C, such as -2 °C, -3 °C or -2 °C.
  • the RF generating module 230 can have a rated power of 100 to 150 W.
  • the radio frequency generating module 230 can be configured to: when the rate of change of the temperature of the object to be processed is greater than or equal to a first temperature rate threshold, the operating power is the rated power; when the rate of change of the temperature of the object to be processed is less than When the first temperature rate threshold is greater than or equal to a second temperature rate threshold, the operating power is 50-60% of the rated power, for example, 50%, 55%, or 60%; when the temperature of the object to be treated changes at a rate less than the second At the temperature rate threshold, the operating power is 20 to 30% of the rated power, for example 20%, 25% or 30%. The first temperature rate threshold is greater than the second temperature rate threshold.
  • 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 temperature of the object to be treated itself is already high, the object to be treated is easily over-thawing.
  • the inventors of the present application have creatively recognized that, when the temperature of the object to be treated is high, the operating power of the radio frequency generating module 230 is lowered, and the object to be treated is effectively prevented from being decomposed.
  • the defrosting device 200 can also include a detection module 250.
  • the detecting module 250 can be configured to detect an incident wave signal and a reflected wave signal connecting the electrical connection between the RF generating module 230 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 230 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 200 can also include a load compensation module 260.
  • the load compensation module 260 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 230 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, and thus increase or decrease the load impedance of the RF generation module 230 Z 2, and the occurrence of radio frequency load impedance Z 2 of the module 230 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 230 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 250 can be configured to further calculate the dielectric constant of the object to be processed and the rate of change of the dielectric coefficient according to the load impedance Z 2 of the radio frequency generating module 230 to determine the thawing progress of the object to be processed.
  • 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 coefficient 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.
  • 5 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 generation module 230 can be configured to stop operation when the rate of change ⁇ / ⁇ t of the dielectric constant of the object to be processed falls below a dielectric rate threshold.
  • the dielectric rate threshold can be from 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 the refrigerator.
  • the invention detects the incident wave signal and the reflected wave signal connecting the electrical connection between the radio frequency generating module 230 and the upper plate, and calculates the change rate of the load impedance of the radio frequency generating module 230 and the dielectric coefficient of the object to be processed, and takes up
  • the space is small and the cost is low, and is particularly suitable for the defrosting device 200 in the refrigerator.
  • the load compensation module 260 causes the difference between the load impedance and the output impedance of the RF generating module 230 to be within a predetermined range, thereby improving the thawing efficiency of the object to be processed.
  • 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.
  • any one of the compartment door bodies may be provided with a defrosting switch 124 for controlling the start or stop of the defrosting procedure.
  • the RF generation module 230 can be configured to begin operation when the defrosting switch 124 is open; when the defrosting switch 124 is closed, the operation is stopped. During the thawing process, the user can terminate the defrosting procedure by turning off the defrosting switch 124.
  • the refrigeration system of the refrigerator 10 can be configured to stop providing cooling for the receiving space provided with the defrosting device when the defrosting switch 124 is open; when the defrosting switch 124 is closed, the original cooling program of the refrigerator 10 is operated, To reduce the influence of the refrigeration system of the refrigerator 10 on the temperature of the defrosting chamber 214 when the thawing apparatus 200 unfreezes the object to be treated.
  • the refrigeration system of the refrigerator 10 may include a compressor, a condenser, a capillary, and an evaporator for providing a cooling amount.
  • a buzzer may be disposed on any of the compartment door bodies to prompt the user that the object to be treated has been thawed.
  • the buzzer may be configured to start working when the detecting module 250 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 the second rate threshold); when the object to be processed is from the thawing chamber When the 214 is taken out, the work is stopped.
  • An infrared sensor may be disposed on the inner wall of the defrosting chamber 214 to sense whether or not the object to be treated is placed in the defrosting chamber 214.
  • FIG. 6 is a schematic structural view of the compressor chamber 140 of Figure 2 .
  • the cabinet 100 of the refrigerator 10 further defines a compressor chamber 140.
  • the compressor chamber 140 may include a main control board 143, a compressor 141, a condensate collecting structure 144, and an external power supply line (not shown) for controlling the operation of the refrigerator 10, which are sequentially disposed to control the operation of the refrigerator 10.
  • the refrigerator 10 may also include a power supply module 142 for powering the defrosting device 200.
  • the power supply module 142 can be disposed in the compressor room 140 of the refrigerator 10 to facilitate heat dissipation and maintenance of the power supply module 142.
  • the power supply module 142 can be fixed to the upper wall of the compressor chamber 140 to facilitate electrical connection of the thawing device 200 with the power supply module 142.
  • the power supply module 142 can be an ACDC converter.
  • the ACDC converter can be configured to be electrically coupled to the main control board 143 to power the defrosting apparatus 200.
  • the power supply module 142 can be disposed between the main control board 143 and the compressor 141 to make the electrical connection between the power supply module 142 and the main control board 143 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 200 to the control circuitry of the refrigerator 10.
  • Fig. 4 is a schematic cross-sectional view taken along line B-B of Fig. 3.
  • the barrel 210 may further include a vertical partition 211 and a horizontal partition 212 for defining an inner space of the cylinder 210.
  • the vertical partition 211 may be disposed to extend from the top plate of the cylinder 210 in the vertical direction to the bottom plate of the cylinder 210.
  • the radio frequency generating module 230 may be disposed between the vertical partition 211 and the rear plate of the cylinder 210.
  • the horizontal partition 212 may be disposed to extend forward from the vertical partition 211 in the horizontal direction.
  • the detection module 250 and the load compensation module 260 may be disposed between the horizontal partition 212 and the top plate of the cylinder 210.
  • the thawing chamber 214 may be enclosed by a vertical partition 211, a horizontal partition 212, and a bottom plate of the cylinder 210 and two lateral side panels.
  • the upper electrode plate 240a may be disposed on a lower surface of the horizontal partition plate 212
  • the lower electrode plate 240b may be disposed on an upper surface of the bottom plate of the cylindrical body 210.
  • the cylinder 210 may further include a baffle 213 extending upward from the front side end of the horizontal partition 212 in the vertical direction to the top plate of the cylinder 210 to prevent the detection module 250 and the load compensation module 260 from being exposed, reducing the defrosting device 200. Aesthetics.
  • the horizontal partition 212 may also be disposed from the rear plate of the cylinder 210 in the horizontal direction according to actual conditions (the size of the RF generating module 230 and the detecting module 250 and the load compensation module 260). Extending, the vertical partition 211 is disposed to extend from the horizontal partition 212 in the vertical direction to the bottom plate of the cylinder 210.
  • the vertical partition 211 can be provided with a first crossing port 2112 to electrically connect the RF generating module 230 to the upper electrode plate 240a via the first wire opening 2112.
  • the rear plate of the cylinder 210 can be provided with a second wire opening 216 for electrically connecting from the power supply module 142 to the RF generating module 230 via the second wire opening 216.
  • the rear plate of the cylinder 210 may be provided with a device air inlet 215, and the vertical partition 211 of the rear side of the defrosting chamber 214 may be provided with a thawing air inlet 2111 to accommodate the defrosting device 200.
  • the air in the space enters the defrosting chamber 214 of the defrosting device 200 via the device air inlet 215 and the defrosting air inlet 2111.
  • the side plates on the lateral sides of the defrosting chamber 214 may be provided with a device air outlet 218 to allow the gas in the defrosting chamber 214 to be discharged to the accommodating space via the device air outlet 218.
  • the distance between the thawing device 200 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 storage compartment.
  • the device air inlet 215 and the defrosting air inlet 2111 of the defrosting device 200 are respectively disposed on lateral sides of the radio frequency generating module 230 to facilitate heat dissipation of the radio frequency generating module 230.
  • the device air inlet 215 and the defrosting air inlet 2111 of the thawing device 200 may be disposed on the same side of the radio frequency generating module 230.
  • the present invention provides a device air inlet 215 and a device air outlet 218 on the defrosting device 200.
  • the defrosting chamber 214 can be used to place the food material, so that the storage space in the refrigerator 10 can be fully utilized.
  • the thawing device 200 can also include a tray 270.
  • the tray 270 is disposed in the defrosting chamber 214, and the object to be treated is placed on the tray 270.
  • the tray 270 can be configured to be controllably moved in the depth direction of the defrosting chamber 214 to facilitate placement and removal of the object to be treated.
  • the lower surface of the tray 270 may be spaced from the lower electrode plate 240b by a distance of 8 to 12 mm, such as 8 mm, 10 mm, 12 mm, to prevent friction with the lower electrode plate 240b during the drawing of the tray 270. .
  • the number of accommodation spaces of the refrigerator 10 may be three.
  • the refrigerator 10 may include a case 100 defining a refrigerating compartment 110, a temperature changing compartment 120, and a freezing compartment 130, and refrigerating for opening and closing the refrigerating compartment 110, the variable temperature compartment 120, and the freezing compartment 130, respectively.
  • the thawing device 200 can be disposed in the temperature changing compartment 120.
  • the thawing device 200 can be fixed in the temperature change compartment 120 by interference fit or snapping with the inner walls on the vertical sides of the temperature change compartment 120.
  • the defrosting switch 124 can be disposed on the temperature changing door body.
  • the refrigerating compartment 110 refers to a storage compartment having a storage temperature of 0 to +8 ° C for the foodstuff
  • the freezing compartment 130 refers to a storage temperature of the foodstuff.
  • the variable temperature compartment 120 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 120 may include a duct cover 122.
  • the air duct cover 122 and the rear inner wall of the temperature change compartment 120 form a temperature change air passage, and the air duct cover 122 is provided with a temperature change air inlet 1221 for providing cooling capacity to the temperature change compartment 120.
  • the device air inlet 215 and the variable temperature air inlet 1221 of the defrosting device 200 can be connected by a connecting tube 123 to facilitate cooling of the defrosting chamber 214 of the defrosting device 200.
  • the projection of the device air inlet 215 of the thawing device 200 in the thickness direction of the rear plate of the barrel 210 may be within the temperature change air inlet 1221 to facilitate cooling of the defrosting chamber 214 of the defrosting device 200.
  • FIG. 7 is a schematic structural view of the thawing apparatus 200 of Figure 3, wherein the apparatus door of the defrosting apparatus is removed to show the internal structure of the cylinder.
  • the thawing device 200 can also include an elastic conductive loop 280.
  • the elastic conductive ring 280 can be disposed at the periphery of the forward opening of the defrosting chamber 214 so as to undergo compression deformation when the device door body 220 is closed, and closely fits the device door body 220, that is, the elastic conductive ring 280 A seal is formed with the device door 220.
  • the elastomeric conductive collar 280 can be made of silicone, silicone fluoride, EPDM, fluorocarbon-silicone, and silver plated aluminum.
  • the elastic conductive ring 280 can be a hollow annular structure that fits snugly against the device door 220 when the device door 220 is closed.
  • the width of the elastic conductive ring 280 can be set to 20-30 mm, such as 20 mm, 25 mm or 30 mm, to improve the sealing of the defrosting device 200.
  • the barrel 210 and the device door 220 may be respectively provided with electromagnetic shielding features 217.
  • the electromagnetic shielding feature 217 disposed on the barrel 210 and the electromagnetic shielding feature 217 disposed on the device door 220 may be respectively disposed in conductive contact with the elastic conductive ring 280 to reduce the defrosting device 200 outward when the device door 220 is closed. The amount of magnetic leakage reduces the harm to the human body.
  • the electromagnetic shielding feature 217 may be a conductive coating applied to the inner wall of the cylinder 210 and the inner surface of the device door 220 (facing the surface of the cylinder 210), abutting against the inner wall of the cylinder 210, and inside the device door 220.
  • the device air inlet 215, the defrosting air inlet 2111, and the device air outlet 218 of the defrosting device 200 may each be provided with a conductive metal mesh 290, which may be disposed to be electromagnetically shielded from the cylindrical body 210.
  • Feature 217 is electrically connected to reduce the amount of magnetic leakage from thawing device 200.
  • the frequency of the radio frequency signal generated by the radio frequency generating module 230 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 200 are the same.
  • the thawing effect test was performed on the defrosting apparatus 200 provided with the frequencies of the respective examples and the respective comparative examples.
  • the thawing time is from the beginning of the thawing, until the thawing device 200 judges that the thawing is completed (ie, the RF generating module stops working);
  • the temperature uniformity after the thawing is completed, the four sides of the beef are respectively measured The temperature of the corner and the center point, and calculate the difference between the average of the four corners and the temperature of the center point.
  • the temperature uniformity is the ratio of the difference to the average value;
  • the juice loss rate the weight before the thawing of the beef and The weight after thawing, and calculate the difference between the two, the juice loss rate is the ratio of the difference to the weight before the thawing of the beef.
  • 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 twenty three 0.6 0.40
  • 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 200 are the same.
  • the thawing device 200 of the RF frequency within the scope of the embodiment has a better thawing effect than the defrosting device 200 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 200 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 200 can be reduced to less than 18 minutes, the temperature uniformity is increased to 0.4 or less, and the juice loss rate is reduced to 0.32% or less.
  • FIG. 8 is a 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 S802 The temperature sensor 219 senses the temperature of the object to be processed.
  • Step S804 Adjust the working power of the radio frequency generating module 230 according to the temperature of the object to be processed.
  • FIG. 9 is a flow chart of a method of adjusting the operating power of the radio frequency generating module 230 according to the temperature of the object to be processed, in accordance with one embodiment of the present invention.
  • the method for adjusting the operating power of the radio frequency generating module 230 may include the following steps:
  • Step S902 Acquire a temperature of the object to be processed.
  • Step S904 determining whether the absolute value of the difference between the temperature of the object to be processed and the preset temperature setting is greater than or equal to the first temperature difference threshold, and if yes, executing step S906; if not, executing step S908.
  • Step S906 The radio frequency generating module 230 operates at a rated power. Go back to step S902.
  • Step S908 determining whether the absolute value of the difference between the temperature of the object to be processed and the preset temperature setting is greater than or equal to the second temperature difference threshold, and if yes, executing step S910; if not, executing step S912.
  • Step S910 The radio frequency generating module 230 operates at 50 to 60% of the rated power. In this step, the RF generation module 230 operates at 50% of the rated power. Go back to step S902.
  • Step S912 The radio frequency generating module 230 operates at 20 to 30% of the rated power. In this step, the RF generation module 230 operates at 25% of the rated power. Go back to step S902.
  • FIG. 10 is a flow chart of a method for adjusting the operating power of a radio frequency generating module according to the temperature of an object to be processed according to another embodiment of the present invention.
  • the method for adjusting the operating power of the radio frequency generating module 230 may include the following steps:
  • Step S1002 Acquire a temperature of the object to be processed.
  • Step S1004 It is determined whether the rate of change of the temperature of the object to be processed is greater than or equal to the first temperature rate threshold. If yes, step S1006 is performed; if not, step S1008 is performed.
  • Step S1006 The radio frequency generating module 230 operates at a rated power. Go back to step S1002.
  • Step S1008 It is determined whether the rate of change of the temperature of the object to be processed is greater than or equal to the second temperature rate threshold. If yes, step S1010 is performed; if not, step S1012 is performed.
  • Step S1010 The radio frequency generating module 230 operates at 50 to 60% of the rated power. In this step, the RF generation module 230 operates at 50% of the rated power. Go back to step S1002.
  • Step S1012 The radio frequency generating module 230 operates at 20 to 30% of the rated power. In this step, the RF generation module 230 operates at 25% of the rated power. Go back to step S1002.
  • FIG. 11 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 for the refrigerator 10 may include the following steps:
  • Step S1102 It is judged whether the defrosting switch 124 is turned on, and if so, step S1104 is performed; if not, step S1102 is performed.
  • Step S1104 The power supply module 142 starts to work, the refrigeration system of the refrigerator 10 stops providing cooling capacity for the accommodating space provided with the defrosting device 200, the radio frequency generating module 230 generates a radio frequency signal of 40 to 42 MHz, and the detecting module 250 detects the connection radio frequency generating module 230 and The incident wave signal and the reflected wave signal of the electrical connection of the upper plate 240a.
  • the defrosting device 200 is disposed in the temperature changing compartment 120.
  • the frequency of the radio frequency signal generated by the radio frequency generating module 230 is 40.68 MHz.
  • Step S1112, step S1132, and step S1152 are executed.
  • Step S1112 Acquire the temperature of the object to be processed.
  • Step S1114 determining whether the absolute value of the difference between the temperature of the object to be processed and the preset temperature setting is greater than or equal to the first temperature difference threshold. If yes, step S1116 is performed; if not, step S1118 is performed.
  • Step S1116 The radio frequency generating module 230 operates at a rated power. The process returns to step S1112.
  • Step S1118 determining whether the absolute value of the difference between the temperature of the object to be processed and the preset temperature setting is greater than or equal to the second temperature difference threshold. If yes, step S1120 is performed; if not, step S1122 is performed.
  • Step S1120 The radio frequency generating module 230 operates at 50 to 60% of the rated power. In this step, the RF generation module 230 operates at 50% of the rated power. The process returns to step S1112.
  • Step S1122 The radio frequency generating module 230 operates at 20 to 30% of the rated power. In this step, the RF generation module 230 operates at 25% of the rated power. The process returns to step S1112.
  • Step S1132 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 S1134 determining whether the rate of change ⁇ / ⁇ t of the dielectric coefficient of the object to be processed is less than or equal to the dielectric rate threshold, and if so, executing step S1136; if not, executing step S1132.
  • Step S1136 The power supply module 142 stops working, the defrosting switch 124 is reset (ie, turned off), the original cooling program of the refrigerator 10 is run, and the buzzer starts to work.
  • Step S1138 determining whether the object to be processed is taken out from the defrosting chamber 214, and if so, executing step S1140; if not; executing step S1136.
  • Step S1140 The buzzer stops working.
  • Step S1152 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 Z2 of the radio frequency generating module 230.
  • Step S1154 It is determined whether the difference between the load impedance Z2 of the radio frequency generating module 230 and the output impedance Z1 is less than the first impedance threshold. If yes, step S1156 is performed; if not, step S1158 is performed.
  • Step S1156 The motor of the load compensation module 260 operates to increase the impedance of the compensation unit. The process returns to step S1152.
  • Step S1158 It is determined whether the difference between the load impedance Z2 of the radio frequency generating module 230 and the output impedance Z1 is greater than the second impedance threshold. If yes, step S1160 is performed; if not, step S1152 is performed.
  • Step S1160 The motor of the load compensation module 260 operates to reduce the impedance of the compensation unit.
  • the process returns to step S1152. (The skilled person can understand that when the program runs to step S1136, the power supply module 142 stops working, that is, stops supplying power to the defrosting device 200, and the radio frequency generating module 230, the temperature sensor 219, the detecting module 250, and the load compensation module 260 are stopped.
  • the temperature sensor 219 stops sensing the temperature of the object to be processed, and the detecting module 250 stops detecting the connected RF generating module 230 and The incident wave signal and the reflected wave signal of the electrical connection of the upper plate 240a, the load compensation module 260 stops working.
  • a defrosting workflow of the refrigerator 10 may include: when the user turns on the defrosting switch 124, the power supply module 142 starts power supply, and the radio frequency generating module 230 generates a radio frequency signal of 40.68 MHz, the temperature sensor 219, the detecting module 250, and the load.
  • the compensation module 260 begins to work.
  • the temperature sensor 219 senses the temperature of the object to be processed, and the detecting module 250 detects the incident wave signal and the reflected wave signal connecting the electrical connection between the RF generating module 230 and the upper plate 240a, and calculates the load impedance Z 2 of the RF transmitting device 230 and The rate of change of the dielectric coefficient ⁇ / ⁇ t.
  • the operating power of the RF generating module 230 is reduced to prevent the processing.
  • the object was decomposed.
  • the load compensation module 260 adjusts the impedance of the compensation unit by the motor, thereby adjusting the RF generating module 230.
  • radio frequency load impedance module 230 is the output impedance Z 2 and Z 1 have a difference of not less than a first threshold impedance value and less than equal to a second predetermined threshold value.
  • the power supply module 142 stops supplying power, and the radio frequency generating module 230, the temperature sensor 219, the detecting module 250, and the load compensation module 260 stop working, buzzing.
  • the device starts working.
  • the buzzer stops working.

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Abstract

一种具有解冻装置（200）的冰箱（10），解冻装置（200）包括：筒体（210），具有前向开口的解冻腔室（214）；装置门体（220）；射频发生模块（230），与其电连接的上、下电极板（240a,240b）在解冻腔室（214）内产生射频波；解冻腔室（214）内壁上至少一个温度传感器（219）感测待处理物温度，据此调节射频发生模块（230）的功率，以防待处理物过度解冻。

Description

冰箱
本申请要求了申请日为2017年06月06日，申请号为201710420156.9，发明名称为“冰箱”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及解冻领域，特别是涉及一种具有快速解冻功能的冰箱。
背景技术
食物在冷冻的过程中，食物的品质得到了保持，然而冷冻的食物在加工或食用前需要解冻。为了便于用户冷冻和解冻食物，现有技术一般通过在冰箱中设置加热装置或微波装置来解冻食物。
然而，通过加热装置来解冻食物，一般需要较长的解冻时间，且解冻时间和温度不易掌握，容易造成食物的水分蒸发和汁液流失，使食物的质量受到损失；通过微波装置来解冻食物，速度快、效率高，所以食物的营养成分损失很低，但是由于微波对水和冰的穿透和吸收有差别，且食物的内部物质分布不均匀，已融化的区域吸收的能量多，易产生解冻不均匀和局部过热的问题。综合考虑，在设计上需要一种具有可保证食物品质的冰箱。
发明内容
本发明的一个目的是要提供一种可保证待处理物品质的冰箱。
本发明一个进一步的目的是要提高冰箱的解冻效率。
特别地，本发明提供了一种冰箱，包括限定有至少一个容纳空间的箱体、用于分别开闭所述至少一个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，所述解冻装置包括：
筒体，其内限定有具有前向开口的解冻腔室，所述解冻腔室用于放置待处理物；
装置门体，设置于所述解冻腔室的前向开口处，用于开闭所述解冻腔室；
射频发生模块，配置为产生射频信号；和
上电极板和下电极板，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，以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；且
所述解冻腔室的内壁上设置有至少一个温度传感器，配置为感测所述待处理物的温度， 并根据所述待处理物的温度调节所述射频发生模块的工作功率，以防止所述待处理物被过度解冻。
可选地，所述至少一个温度传感器的数量为三个；所述三个温度传感器分别设置于所述解冻腔室的横向两个侧壁以及后壁上；且所述待处理物的温度为所述三个温度传感器感测到的温度的平均值。
可选地，所述三个传感器在所述解冻装置的竖向方向上间隔设置。
可选地，所述射频发生模块配置为：
当所述待处理物的温度与一预设温度定值之差的绝对值大于等于一第一温差阈值时，其工作功率为额定功率；
当所述待处理物的温度与所述预设温度定值之差的绝对值小于所述第一温差阈值且大于等于一第二温差阈值时，其工作功率为额定功率的50～60％；
当所述待处理物的温度与所述预设温度定值之差的绝对值小于所述第二温差阈值时，其工作功率为额定功率的20～30％；其中
所述第一温差阈值大于所述第二温差阈值。
可选地，所述射频发生模块配置为：
当所述待处理物的温度的变化速率大于等于一第一温度速率阈值时，其工作功率为额定功率；
当所述待处理物的温度的变化速率小于所述第一温度速率阈值且大于等于一第二温度速率阈值时，其工作功率为额定功率的50～60％；
当所述待处理物的温度的变化速率小于所述第二温度速率阈值时，其工作功率为额定功率的20～30％；其中
所述第一温度速率阈值大于所述第二温度速率阈值。
可选地，所述冰箱还包括：
解冻开关，设置于任一所述间室门体上，用于控制解冻程序的启停；且所述射频发生模块配置为：
当所述解冻开关打开时，开始工作；
当所述解冻开关关闭时，停止工作。
可选地，所述冰箱的制冷系统配置为：
当所述解冻开关打开时，停止为设置有所述解冻装置的容纳空间提供冷量；
当所述解冻开关关闭时，运行所述冰箱的原制冷程序。
可选地，所述解冻装置还包括：检测模块，配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，并根据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。
可选地，所述解冻装置还包括：负载补偿模块，配置为可受控地增大或减小所述射频发生模块的负载阻抗，并使所述射频发生模块的负载阻抗与输出阻抗之差大于等于第一阻抗阈值且小于等于第二预设阻抗阈值，以提高所述待处理物的解冻效率。
可选地，所述检测模块配置为进一步根据所述射频发生模块的负载阻抗计算所述待处理物的介电系数的变化速率；且所述射频发生模块配置为：
当所述待处理物的介电系数的变化速率下降至小于等于一介电速率阈值时，停止工作。
相比于现有技术中解冻功率一定的解冻装置，本发明通过待处理物的温度来调节射频发生模块的实时工作功率，防止待处理物被过度解冻，保证了待处理物的品质。
进一步地，本发明通过检测连接射频发生模块与上极板的电连线的入射波信号和反射波信号，经计算得出射频发生模块的负载阻抗，占用空间小且成本低，特别适用于冰箱中的解冻装置。并通过负载补偿模块使射频发生模块的负载阻抗与输出阻抗之差处于一预设范围内，提高了待处理物的解冻效率。
进一步地，本发明通过检测模块计算待处理物的介电系数的变化速率，来判断解冻是否完成，相比于现有技术中通过感测待处理物的温度来判断解冻是否完成，判断更加准确，可进一步防止待处理物被过分解冻，且测试表明，由本发明的解冻装置解冻的待处理物，解冻完成时的温度一般为-4～-2℃，可避免当待处理物为肉品时，解冻产生血水。
附图说明
图1是根据本发明一个实施例的冰箱的示意性结构图，其中该冰箱的所有外门体皆被去除，以示出冰箱箱体内的间室结构；
图2是图1所示冰箱的示意性剖视图；
图3是图2中区域A的示意性局部放大图；
图4是沿图3中的剖切线B-B截取的示意性剖视图；
图5是根据本发明一个实施例的待处理物的介电系数的变化速率曲线图；
图6是图2中压缩机室的示意性结构图；
图7是图3中解冻装置的示意性结构图，其中该解冻装置的装置门体被去除，以示出筒体的内部结构；
图8是根据本发明一个实施例的用于冰箱的解冻方法的流程图；
图9是根据本发明一个实施例的根据待处理物的温度调节射频发生模块的工作功率的方法流程图；
图10是根据本发明另一个实施例的根据待处理物的温度调节射频发生模块的工作功率的方法流程图；
图11是根据本发明一个实施例的用于冰箱的解冻方法的详细流程图。
具体实施方式
以下将结合附图所示的具体实施方式对本发明进行详细描述。但这些实施方式并不限制本发明，本领域的普通技术人员根据这些实施方式所做出的结构、方法、或功能上的变换均包含在本发明的保护范围内。
图1是根据本发明一个实施例的冰箱10的示意性结构图，其中该冰箱10的所有外门体皆被去除，以示出冰箱10的箱体100内的间室结构；图2是图1所示冰箱10的示意性剖视图；图3是图2中区域A的示意性局部放大图。参见图1至图3，冰箱10一般性地可包括限定有至少一个容纳空间的箱体100、用于分别开闭各个容纳空间的取放口的间室门体，以及设置于一个容纳空间的解冻装置200。
具体地，解冻装置200可包括筒体210、装置门体220、射频发生模块230、以及上电极板240a和下电极板240b。筒体210可包括顶板、底板、后板以及相对的两个横向侧板，其内可限定有具有前向开口的解冻腔室214，解冻腔室214用于放置待处理物。装置门体220可设置于解冻腔室214的前向开口处，用于打开或关闭解冻腔室214。装置门体220可通过适当方法与筒体210安装在一起，例如左开门、右开门或上开门。射频发生模块230可配置为产生射频信号(一般指频率在300KHz～300GHz的射频信号)。上电极板240a和下电极板240b可分别水平地设置于解冻腔室214的顶壁和底壁处，且分别与射频发生模块230电连接，以根据射频发生模块230产生的射频信号在解冻腔室214内产生相应参数的射频波，并解冻放置于解冻腔室214内的待处理物。在本发明中，上电极板240a为发射天线；下电极板240b为接收天线。在一些实施例中，可采用50欧姆的电连线使上电极板240a和下电极板240b分别与射频发生模块230电连接。
特别地，解冻腔室214的内壁上可设置有至少一个温度传感器219，即温度传感器219的数量可为一个、两个或三个以上等。温度传感器219可配置为感测待处理物的温度。并根据待处理物的温度调节射频发生模块230的实时工作功率，以防止待处理物被过分解冻。相比于现有技术中解冻功率一定的解冻装置，本发明通过待处理物的温度来确定射频发生模块230的实时工作功率，防止待处理物被过度解冻，保证了待处理物的品质。
在一些优选实施例中，温度传感器219的数量可为三个。三个温度传感器219可分别设置于解冻腔室214的横向两个侧壁以及后壁上。待处理物的温度为三个温度传感器219感测到的温度的平均值，以保证所得待处理物的温度的精确度。在一些进一步优选的实施例中，三个温度传感器219在解冻装置200的竖向方向上间隔设置，以保证可感测到不同高度的待处理物的温度。在该实施例中，三个温度传感器219可分别设置于解冻腔室214高度的1/3、1/2和2/3处。
在一些实施例中，射频发生模块230可配置为当待处理物的温度与一预设温度定值之差的绝对值大于等于一第一温差阈值时，其工作功率为额定功率；当待处理物的温度与一预设温度定值之差的绝对值小于第一温差阈值且大于等于一第二温差阈值时，其工作功率为额定功率的50～60％，例如50％、55％或60％；当待处理物的温度与一预设温度定值之差的绝对值小于第二温差阈值时，其工作功率为额定功率的20～30％，例如20％、25％或30％。其中第一温差阈值大于第二温差阈值。在该实施例中，预设温度定值可为-4～-2℃，例如-2℃、-3℃或-2℃。射频发生模块230的额定功率可为100～150W。
在另一些实施例中，射频发生模块230可配置为当待处理物的温度的变化速率大于等于一第一温度速率阈值时，其工作功率为额定功率；当待处理物的温度的变化速率小于第一温度速率阈值且大于等于一第二温度速率阈值时，其工作功率为额定功率的50～60％，例如50％、55％或60％；当待处理物的温度的变化速率小于第二温度速率阈值时，其工作功率为额定功率的20～30％，例如20％、25％或30％。其中第一温度速率阈值大于第二温度速率阈值。
在本发明之前，本领域技术人员普遍认为，当待处理物的温度已较高(即待处理物的温度大于等于-7℃)时，热效应会显著衰减，因而待处理物不会被过分解冻。然而实际情况并非如此，通常射频解冻功率较大，例如大于100W，当待处理物的本身温度已较高时，待处理物极易被过度解冻。本申请的发明人创造性地认识到，在待处理物的温度较高时，降低射频发生模块230的工作功率，可有效地防止待处理物被过分解冻。
在一些实施例中，解冻装置200还可包括检测模块250。检测模块250可配置为检测连接射频发生模块230与上极板的电连线的入射波信号和反射波信号，并根据入射波信号的电压和电流，以及反射波信号的电压和电流，计算射频发生模块230的负载阻抗。负载阻抗的计算公式如下：
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)
在公式(1)、(2)、(3)中：SWR为驻波比；Z 1为输出阻抗；Z 2为负载阻抗；U 1为入射波电压；I 1为入射波电流；R 1为输出电阻；X 1为输出电抗；U 2为反射波电压；I 2为反射波电流；R 2为负载电阻；X 2为负载电抗(本领域技术人员均可理解地，输出阻抗为连接射频发生模块230与上电极板240a的电连线的阻抗，负载阻抗为待处理物的阻抗)。
解冻装置200还可包括负载补偿模块260。负载补偿模块260可包括一补偿单元和用于调节补偿单元的负载的电机。补偿单元可设置为与待处理物串联，即射频发生模块230的负载阻抗为待处理物的阻抗与补偿单元的阻抗的和。电机可配置为受控地增大或减小补偿单元的负载，进而增大或减小射频发生模块230的负载阻抗Z 2，并使射频发生模块230的负载阻抗Z 2与输出阻抗Z 1之差(即负载阻抗Z 2减去输出阻抗Z 1得到的数值)大于等于一第一阻抗阈值且小于等于一第二阻抗阈值，且第一阻抗阈值小于第二阻抗阈值，以提高待处理物的解冻效率。在一些优选实施例中，第一阻抗阈值为输出阻抗Z 1的-6～-4％，第二阻抗阈值为输出阻抗Z 1的4～6％。进一步优选地，第一阻抗阈值为输出阻抗Z 1的-5％，第二阻抗阈值为输出阻抗Z 1的5％。换句话说，负载补偿模块可配置为使射频发生模块230的负载阻抗Z 2与输出阻抗Z 1之差的绝对值，在整个解冻过程中一直小于输出阻抗Z 1的5％，例如可为输出阻抗Z 1的1％、3％或5％。
检测模块250可配置为进一步根据射频发生模块230的负载阻抗Z 2，计算待处理物的介电系数及介电系数的变化速率，以判断待处理物的解冻进度。待处理物的介电系数的计算公式如下：
X 2＝1/2πfC           (4)
ε＝4πKdC/S          (5)
在公式(4)、(5)中：f为射频波的频率；C为上电极板140a与下电极板140b构成的电容器的电容；ε为待处理物的介电系数；K为静电常数；d为上极板的厚度；S为上极板的面积。
待处理物的介电系数的变化速率可通过计算单位时间Δt内的介电系数ε的变化值Δε获得，其中单位时间Δt可为0.1秒～1秒，例如0.1秒、0.5秒或1秒。图5是根据本发明一 个实施例的待处理物的介电系数的变化速率曲线图(纵坐标为待处理物的介电系数的变化速率Δε/Δt；横坐标为待处理物的解冻时间t，单位为min)。参见图5，在一些优选实施例中，射频发生模块230可配置为当待处理物的介电系数的变化速率Δε/Δt下降至小于等于一介电速率阈值时，停止工作。介电速率阈值可为1～2，例如1、1.5或2。
随着待处理物的温度变化，待处理物的介电系数也会随之变化，是本领域技术人员习知的，然而介电系数通常由专用仪器(例如介电系数测试仪)测得，且专用仪器占用空间大、成本高，不适用于冰箱。本发明通过检测连接射频发生模块230与上极板的电连线的入射波信号和反射波信号，经计算得出射频发生模块230的负载阻抗和待处理物的介电系数的变化速率，占用空间小且成本低，特别适用于冰箱中的解冻装置200。并通过负载补偿模块260使射频发生模块230的负载阻抗与输出阻抗之差处于一预设范围内，提高了待处理物的解冻效率。
进一步地，本发明通过待处理物的介电系数的变化速率判断解冻是否完成，相比于现有技术中通过感测待处理物的温度来判断解冻是否完成，判断更加准确，可进一步防止待处理物被过分解冻，且测试表明，由本发明的解冻装置解冻的待处理物，解冻完成时的温度一般为-4～-2℃，可避免当待处理物为肉品时，解冻产生血水。
在一些实施例中，任意一个间室门体上可设置有用于控制解冻程序开始或停止的解冻开关124。射频发生模块230可配置为当解冻开关124打开时，开始工作；当解冻开关124关闭时，停止工作。在解冻过程中，用户可通过关闭解冻开关124来终止解冻程序。在一些优选实施例中，冰箱10的制冷系统可配置为当解冻开关124打开时，停止为设置有解冻装置的容纳空间提供冷量；当解冻开关124关闭时，运行冰箱10的原制冷程序，以减少在解冻装置200解冻待处理物时，冰箱10的制冷系统对解冻腔室214的温度的影响。其中冰箱10的制冷系统可包括压缩机、冷凝器、毛细管和用于提供冷量的蒸发器。
任意一个间室门体上还可设置有蜂鸣器(图中未示出)，用来提示用户待处理物已解冻完成。蜂鸣器可配置为当检测模块250判断待处理物解冻完成时(待处理物的介电系数的变化速率下降至小于等于第二速率阈值时)，开始工作；当待处理物从解冻腔室214中取出时，停止工作。解冻腔室214的内壁上可设置有红外传感器，来感测解冻腔室214内是否放置有待处理物。
图6是图2中压缩机室140的示意性结构图。参见图6，冰箱10的箱体100还限定有压缩机室140。压缩机室140可包括依次设置的用于控制冰箱10运行的主控板143、压缩机141、冷凝水收集结构144以及用于为冰箱10运行供电的外接电源线(图中未示出)。在一 些实施例中，冰箱10还可包括用于为解冻装置200供电的供电模块142。供电模块142可设置于冰箱10的压缩机室140内，以便于供电模块142的散热和维修。供电模块142可固定于压缩机室140的上壁，以便于解冻装置200与供电模块142的电连接。供电模块142可为ACDC转换器。ACDC转换器可设置为与主控板143电连接，以为解冻装置200供电。供电模块142可设置于主控板143与压缩机141之间，以使供电模块142与主控板143的电连接更加方便。本领域技术人员均可理解地，将解冻装置200的各个部件与冰箱10的控制电路相连是容易实现的。
图4是沿图3中的剖切线B-B截取的示意性剖视图。参见图3和图4，筒体210还可包括用于限定筒体210的内部空间的竖向隔板211和水平隔板212。竖向隔板211可设置为自筒体210的顶板沿竖向方向延伸至筒体210的底板。射频发生模块230可设置于竖向隔板211和筒体210的后板之间。水平隔板212可设置为自竖向隔板211沿水平方向向前延伸。检测模块250和负载补偿模块260可设置于水平隔板212与筒体210的顶板之间。解冻腔室214可由竖向隔板211、水平隔板212以及筒体210的底板和两个横向侧板围成。上电极板240a可设置于水平隔板212的下表面，下电极板240b可设置于筒体210的底板的上表面。筒体210还可包括自水平隔板212的前侧端部沿竖向方向向上延伸至筒体210的顶板的挡板213，以防止检测模块250以及负载补偿模块260外露，降低解冻装置200的美观性。在另一些实施例中，也可根据实际情况(射频发生模块230和检测模块250以及负载补偿模块260的尺寸大小)，将水平隔板212设置为自筒体210的后板沿水平方向向前延伸，竖向隔板211设置为自水平隔板212沿竖向方向延伸至筒体210的底板。
竖向隔板211可开设有第一过线口2112，以使射频发生模块230经由第一过线口2112与上电极板240a电连接。筒体210的后板可开设有第二过线口216，以使从供电模块142经由第二过线口216与射频发生模块230电连接。
在一些实施例中，筒体210的后板可开设有装置进风口215，解冻腔室214的后侧的竖向隔板211可开设有解冻进风口2111，以使设置有解冻装置200的容纳空间内的空气经由装置进风口215和解冻进风口2111进入至解冻装置200的解冻腔室214。解冻腔室214的横向两侧的侧板可开设有装置出风口218，以使解冻腔室214内的气体经由装置出风口218排出至容纳空间。解冻装置200与设置其的容纳空间的横向两侧的内壁的距离可为2～3mm，例如2mm、2.5mm或3mm，以便于解冻间室内的气体排出至储物间室内。
在一些优选实施例中，解冻装置200的装置进风口215和解冻进风口2111可分别设置于射频发生模块230的横向两侧，以便于射频发生模块230的散热。在一些替代性实施例中， 解冻装置200的装置进风口215和解冻进风口2111可设置于射频发生模块230的同一侧。
本发明通过在解冻装置200上设置有装置进风口215和装置出风口218，在未接收到解冻指令时，解冻腔室214可用来放置食材，使冰箱10内的储物空间得到充分的利用。
解冻装置200还可包括托盘270。托盘270设置于解冻腔室214内，且待处理物放置于托盘270上。托盘270可配置为可受控地在解冻腔室214的进深方向上移动，以便于待处理物的放置和取出。在一些优选实施例中，托盘270的下表面与下电极板240b的距离可为8～12mm，例如8mm、10mm、12mm，以防止在托盘270抽拉的过程中，与下电极板240b产生摩擦。
参见图1至图3，在一些实施例中，冰箱10的容纳空间的数量可为三个。具体地，冰箱10可包括限定有冷藏间室110、变温间室120和冷冻间室130的箱体100，以及分别用于开闭冷藏间室110、变温间室120和冷冻间室130的冷藏门体111、变温门体121和冷冻门体131。解冻装置200可设置于变温间室120中。解冻装置200可通过与变温间室120竖向两侧的内壁过盈配合或卡接等方式固定在变温间室120中。解冻开关124可设置于变温门体上。
此外，也可说明的是，本领域技术人员均熟知地，冷藏间室110是指对食材的保藏温度为0～+8℃的储物间室；冷冻间室130是指对食材的保藏温度为-20～-15℃的储物间室；变温间室120是指可较大范围地(例如调整范围可在4℃以上，且可调至0℃以上或0℃以下)改变其保藏温度的储物间室，一般其保藏温度可跨越冷藏、软冷冻(一般为-4～0℃)和冷冻温度，优选为-16～+4℃。
在一些实施例中，根据本发明的冰箱10可以为风冷冰箱，变温间室120可包括风道盖板122。风道盖板122与变温间室120的后向内壁夹置形成变温风道，且风道盖板122上开设有变温进风口1221，用于为变温间室120提供冷量。在一些优选实施例中，解冻装置200的装置进风口215与变温进风口1221可通过一连接管123连接，以便于为解冻装置200的解冻腔室214进行制冷。在另一些优选实施例中，解冻装置200的装置进风口215在筒体210的后板的厚度方向上的投影可处于变温进风口1221内，以便于为解冻装置200的解冻腔室214进行制冷。
图7是图3中解冻装置200的示意性结构图，其中该解冻装置的装置门体被去除，以示出筒体的内部结构。参见图7，解冻装置200还可包括弹性导电环圈280。弹性导电环圈280可设置于解冻腔室214的前向开口的周缘处，以使其在装置门体220关闭时发生挤压变形，与装置门体220紧密贴合，即弹性导电环圈280与装置门体220之间形成密封。在一些优选 实施例中，弹性导电环圈280可由硅酮、硅酮氟化物、EPDM、碳氟化合物-硅氟化合物以及镀银铝制成。弹性导电环圈280可为空心环状结构，使其在装置门体220关闭时，与装置门体220紧密贴合。弹性导电环圈280的宽度可设置为20～30mm，例如20mm、25mm或30mm，以提高解冻装置200的密封性。筒体210和装置门体220可分别设置有电磁屏蔽特征217。设置于筒体210的电磁屏蔽特征217和设置于装置门体220的电磁屏蔽特征217可分别设置为与弹性导电环圈280导电接触，以在装置门体220关闭时，减少解冻装置200向外的磁泄漏量，减少对人体造成的危害。电磁屏蔽特征217可为涂覆于筒体210的内壁和装置门体220的内表面(朝向筒体210的表面)的导电涂层、贴靠于筒体210的内壁和装置门体220的内表面的导电金属网或形成于围成筒体210的各个板体之中和装置门体220中的导电金属网等。在一些优选实施例中，解冻装置200的装置进风口215、解冻进风口2111和装置出风口218可均设置有导电金属网290，导电金属网290可设置为与设置于筒体210的电磁屏蔽特征217导电连接，以减少解冻装置200的磁泄漏量。
特别地，在本发明中，射频发生模块230产生的射频信号的频率(即用于解冻待处理物的电磁波)可为40～42MHz，例如40MHz、40.48MHz、40.68MHz、41MHz或42MHz，以减少待处理物的解冻时间，提高待处理物的温度均匀性及降低其汁液流失率。在优选实施例中，射频波的频率可为40.48～40.68MHz范围内预设的一固定频率，以进一步地减少待处理物的解冻时间，提高待处理物的温度均匀性及降低其汁液流失率。其中，当射频波的频率为40.68MHz时，解冻效果最好。
为了进一步理解本发明，下面结合更具体的实施例对本发明的优选实施方案进行描述，但本发明并不限于这些实施例。
表1
Figure PCTCN2018089913-appb-000001
分别设置有上述实施例1-5及对比例1-2的射频频率的解冻装置200中，射频波的功率均为100W，解冻装置200的结构及其工作流程均相同。
对设置有各实施例和各对比例的频率的解冻装置200，进行解冻效果测试。测试说明：选用1kg形状规格相同，且初始温度为-18℃的牛肉，分别放置于各实施例和各对比例的解冻装置200内的托盘270上，分别测量各实施例和各对比例的解冻时间、温度均匀性和液汁流失率，其中解冻时间为自解冻开始，至解冻装置200判断解冻完成(即射频发生模块停止 工作)的时间；温度均匀性：解冻完成后，分别测量牛肉四个边角及中心点的温度，并计算四个边角的平均值与中心点温度的差值，温度均匀性为该差值与该平均值的比值；汁液流失率：分别测量牛肉解冻前的重量和解冻后的重量，并计算二者差值，汁液流失率为该差值与牛肉解冻前的重量的比值。
根据实施例1-7和根据对比例1-2的解冻效果测试结果如表2。
表2
  解冻时间(min) 温度均匀性 汁液流失率(％)
实施例1 19 0.4 0.35
实施例2 18 0.4 0.32
实施例3 18 0.3 0.29
实施例4 19 0.5 0.35
实施例5 20 0.5 0.40
对比例1 25 0.6 0.35
对比例2 23 0.6 0.40
根据表2中实施例5和对比例1的测试结果可以看出，在射频波的功率相同，且解冻装置200的结构及其工作流程均相同的情况下，在同等测试条件下，应用本发明实施例范围内的射频频率的解冻装置200的解冻效果优于应用现有技术中的射频频率的解冻装置200，前者比后者的解冻时间减少了20％，温度均匀性提高了17％。
根据表2中实施例1-5的测试结果可以看出，应用本发明各实施例的解冻装置200的解冻时间均在20min以下，温度均匀性均在0.5以下，汁液流失率均在0.40％以下。通过进一步优选射频波的频率(例如射频频率在40.48～40.68MHz)，可将解冻装置200的解冻时间减少至18min以下，温度均匀性提高至0.4以下，汁液流失率降低至0.32％以下。
图8是根据本发明一个实施例的用于冰箱10的解冻方法的流程图。参见图8，本发明的冰箱10的解冻方法可以包括如下步骤：
步骤S802：温度传感器219感测待处理物的温度。
步骤S804：根据待处理物的温度调节射频发生模块230的工作功率。
图9是根据本发明一个实施例的根据待处理物的温度调节射频发生模块230的工作功率的方法流程图。参见图9，调节射频发生模块230的工作功率的方法可以包括如下步骤：
步骤S902：获取待处理物的温度。
步骤S904：判断待处理物的温度与预设温度定值之差的绝对值是否大于等于第一温差阈值，若是，执行步骤S906；若否，执行步骤S908。
步骤S906：射频发生模块230以额定功率工作。返回步骤S902。
步骤S908：判断待处理物的温度与预设温度定值之差的绝对值是否大于等于第二温差 阈值，若是，执行步骤S910；若否，执行步骤S912。
步骤S910：射频发生模块230以额定功率的50～60％工作。在该步骤中，射频发生模块230以额定功率的50％工作。返回步骤S902。
步骤S912：射频发生模块230以额定功率的20～30％工作。在该步骤中，射频发生模块230以额定功率的25％工作。返回步骤S902。
图10是根据本发明另一个实施例的根据待处理物的温度调节射频发生模块的工作功率的方法流程图。参见图10，调节射频发生模块230的工作功率的方法可以包括如下步骤：
步骤S1002：获取待处理物的温度。
步骤S1004：判断待处理物的温度的变化速率是否大于等于第一温度速率阈值，若是，执行步骤S1006；若否，执行步骤S1008。
步骤S1006：射频发生模块230以额定功率工作。返回步骤S1002。
步骤S1008：判断待处理物的温度的变化速率是否大于等于第二温度速率阈值，若是，执行步骤S1010；若否，执行步骤S1012。
步骤S1010：射频发生模块230以额定功率的50～60％工作。在该步骤中，射频发生模块230以额定功率的50％工作。返回步骤S1002。
步骤S1012：射频发生模块230以额定功率的20～30％工作。在该步骤中，射频发生模块230以额定功率的25％工作。返回步骤S1002。
图11是根据本发明一个实施例的用于冰箱10的解冻方法的详细流程图。参见图11，用于冰箱10的解冻方法可以包括如下步骤：
步骤S1102：判断解冻开关124是否打开，若是，执行步骤S1104；若否，执行步骤S1102。
步骤S1104：供电模块142开始工作，冰箱10的制冷系统停止为设置有解冻装置200的容纳空间提供冷量，射频发生模块230产生40～42MHz的射频信号，检测模块250检测连接射频发生模块230与上极板240a的电连线的入射波信号和反射波信号。在该步骤中，解冻装置200设置于变温间室120中。射频发生模块230产生的射频信号的频率为40.68MHz。运行步骤S1112、步骤S1132和步骤S1152。
步骤S1112：获取待处理物的温度。
步骤S1114：判断待处理物的温度与预设温度定值之差的绝对值是否大于等于第一温差阈值，若是，执行步骤S1116；若否，执行步骤S1118。
步骤S1116：射频发生模块230以额定功率工作。返回步骤S1112。
步骤S1118：判断待处理物的温度与预设温度定值之差的绝对值是否大于等于第二温差 阈值，若是，执行步骤S1120；若否，执行步骤S1122。
步骤S1120：射频发生模块230以额定功率的50～60％工作。在该步骤中，射频发生模块230以额定功率的50％工作。返回步骤S1112。
步骤S1122：射频发生模块230以额定功率的20～30％工作。在该步骤中，射频发生模块230以额定功率的25％工作。返回步骤S1112。
步骤S1132：获取入射波信号的电压和电流以及反射波信号的电压和电流，计算待处理物的介电系数的变化速率Δε/Δt。
步骤S1134：判断待处理物的介电系数的变化速率Δε/Δt是否小于等于介电速率阈值，若是，执行步骤S1136；若否，执行步骤S1132。
步骤S1136：供电模块142停止工作，解冻开关124复位(即关闭)，运行冰箱10的原制冷程序，蜂鸣器开始工作。
步骤S1138：判断待处理物是否从解冻腔室214内取出，若是，执行步骤S1140；若否；执行步骤S1136。
步骤S1140：蜂鸣器停止工作。
步骤S1152：获取入射波信号的电压和电流以及反射波信号的电压和电流，计算射频发生模块230的负载阻抗Z2。
步骤S1154：判断射频发生模块230的负载阻抗Z2与输出阻抗Z1的差值是否小于第一阻抗阈值，若是，执行步骤S1156；若否，执行步骤S1158。
步骤S1156：负载补偿模块260的电机工作，增大补偿单元的阻抗。返回步骤S1152。
步骤S1158：判断射频发生模块230的负载阻抗Z2与输出阻抗Z1的差值是否大于第二阻抗阈值，若是，执行步骤S1160；若否，执行步骤S1152。
步骤S1160：负载补偿模块260的电机工作，减小补偿单元的阻抗。返回步骤S1152。(本领域技术人员可以理解地，当程序运行至步骤S1136时，供电模块142停止工作，即停止为解冻装置200供电，射频发生模块230、温度传感器219、检测模块250以及负载补偿模块260均停止工作，即当待处理物的介电系数的变化速率Δε/Δt下降至小于等于介电速率阈值时，温度传感器219停止感测待处理物的温度，检测模块250停止检测连接射频发生模块230与上极板240a的电连线的入射波信号和反射波信号，负载补偿模块260停止工作。)
本发明一个实施例的冰箱10的一个解冻工作流程可包括：当用户打开解冻开关124时，供电模块142开始供电，射频发生模块230产生40.68MHz的射频信号，温度传感器219、检测模块250和负载补偿模块260开始工作。温度传感器219感测待处理物的温度，检测模 块250检测连接射频发生模块230与上极板240a的电连线的入射波信号和反射波信号，并计算射频发射装置230的负载阻抗Z 2及介电系数的变化速率Δε/Δt。在整个解冻工作流程中，当待处理物的温度与预设温度定值之差的绝对值减小或待处理物的温度的变化速率降低时，降低射频发生模块230的工作功率，防止待处理物被过分解冻。当射频发生模块230的负载阻抗Z 2与输出阻抗Z 1之差小于第一阻抗阈值或大于第二阻抗阈值时，负载补偿模块260通过电机调节补偿单元的阻抗大小，进而调节射频发生模块230的负载阻抗Z 2，使射频发生模块230的负载阻抗Z 2与输出阻抗Z 1之差一直大于等于第一阻抗阈值且小于等于第二预设阈值。当待处理物的介电系数的变化速率Δε/Δt小于等于第二速率阈值时，供电模块142停止供电，射频发生模块230、温度传感器219、检测模块250和负载补偿模块260停止工作，蜂鸣器开始工作。当用户从解冻腔室214内取出待处理物时，蜂鸣器停止工作。
上文所列出的详细说明仅仅是针对本发明的可行性实施方式的具体说明，它们并非用以限制本发明的保护范围，凡未脱离本发明技艺精神所作的等效实施方式或变更均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种冰箱，包括限定有至少一个容纳空间的箱体、用于分别开闭所述至少一个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，所述解冻装置包括：
    筒体，其内限定有具有前向开口的解冻腔室，所述解冻腔室用于放置待处理物；
    装置门体，设置于所述解冻腔室的前向开口处，用于开闭所述解冻腔室；
    射频发生模块，配置为产生射频信号；和
    上电极板和下电极板，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，以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；且
    所述解冻腔室的内壁上设置有至少一个温度传感器，配置为感测所述待处理物的温度，并根据所述待处理物的温度调节所述射频发生模块的工作功率，以防止所述待处理物被过度解冻。
  2. 根据权利要求1所述的冰箱，其中所述至少一个温度传感器的数量为三个；所述三个温度传感器分别设置于所述解冻腔室的横向两个侧壁以及后壁上；且所述待处理物的温度为所述三个温度传感器感测到的温度的平均值。
  3. 根据权利要求2所述的冰箱，其中所述三个传感器在所述解冻装置的竖向方向上间隔设置。
  4. 根据权利要求1所述的冰箱，其中所述射频发生模块配置为：
    当所述待处理物的温度与一预设温度定值之差的绝对值大于等于一第一温差阈值时，其工作功率为额定功率；
    当所述待处理物的温度与所述预设温度定值之差的绝对值小于所述第一温差阈值且大于等于一第二温差阈值时，其工作功率为额定功率的50～60％；
    当所述待处理物的温度与所述预设温度定值之差的绝对值小于所述第二温差阈值时，其工作功率为额定功率的20～30％；其中
    所述第一温差阈值大于所述第二温差阈值。
  5. 根据权利要求1所述的冰箱，其中所述射频发生模块配置为：
    当所述待处理物的温度的变化速率大于等于一第一温度速率阈值时，其工作功率为额定功率；
    当所述待处理物的温度的变化速率小于所述第一温度速率阈值且大于等于一第二温度 速率阈值时，其工作功率为额定功率的50～60％；
    当所述待处理物的温度的变化速率小于所述第二温度速率阈值时，其工作功率为额定功率的20～30％；其中
    所述第一温度速率阈值大于所述第二温度速率阈值。
  6. 根据权利要求1所述的冰箱，还包括：解冻开关，设置于任一所述间室门体上，用于控制解冻程序的启停；且所述射频发生模块配置为：
    当所述解冻开关打开时，开始工作；
    当所述解冻开关关闭时，停止工作。
  7. 根据权利要求6所述的冰箱，其中所述冰箱的制冷系统配置为：
    当所述解冻开关打开时，停止为设置有所述解冻装置的容纳空间提供冷量；
    当所述解冻开关关闭时，运行所述冰箱的原制冷程序。
  8. 根据权利要求1所述的冰箱，其中所述解冻装置还包括：检测模块，配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，并根据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。
  9. 根据权利要求8所述的冰箱，其中所述解冻装置还包括：负载补偿模块，配置为可受控地增大或减小所述射频发生模块的负载阻抗，并使所述射频发生模块的负载阻抗与输出阻抗之差大于等于第一阻抗阈值且小于等于第二预设阻抗阈值，以提高所述待处理物的解冻效率。
  10. 根据权利要求9所述的冰箱，其中所述检测模块配置为进一步根据所述射频发生模块的负载阻抗计算所述待处理物的介电系数的变化速率；且所述射频发生模块配置为：
    当所述待处理物的介电系数的变化速率下降至小于等于一介电速率阈值时，停止工作。
PCT/CN2018/089913 2017-06-06 2018-06-05 冰箱 WO2018223949A1 (zh)

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