WO2018223948A1 - 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
- WO2018223948A1 WO2018223948A1 PCT/CN2018/089912 CN2018089912W WO2018223948A1 WO 2018223948 A1 WO2018223948 A1 WO 2018223948A1 CN 2018089912 W CN2018089912 W CN 2018089912W WO 2018223948 A1 WO2018223948 A1 WO 2018223948A1
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- WIPO (PCT)
- Prior art keywords
- defrosting
- thawing
- radio frequency
- generating module
- impedance
- Prior art date
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- 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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- 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
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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
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 improve the thawing efficiency of the refrigerator.
- Another further object of the first aspect of the invention is to prevent the object to be treated from being decomposed.
- a defrosting method for a thawing apparatus comprising a cylinder defining a defrosting chamber for placing a workpiece to be processed and having a forward opening, a device door for opening and closing the defrosting chamber at the forward opening of the defrosting chamber, a radio frequency generating module, respectively disposed horizontally at a top wall and a bottom wall of the defrosting chamber, respectively An upper electrode plate and a lower electrode plate electrically connected to the radio frequency generating module, a tray disposed in the defrosting chamber for carrying the object to be processed, and a tray disposed on the tray for sensing the to-be-processed a load cell for the weight of the object;
- the thawing method includes:
- the load cell senses a weight of the object to be processed
- the thawing method for the thawing device further includes:
- the radio frequency generating module starts to work
- the radio frequency generating module does not work.
- the thawing method for the thawing device further includes:
- the operating power of the radio frequency generating module is 75 to 95% of the rated power
- the operating power of the radio frequency generating module is rated power
- the first weight threshold is greater than zero, the first weight threshold is less than the second weight threshold, the second weight threshold is less than the third weight threshold, and the preset range is greater than or equal to the first The weight threshold is less than or equal to the third weight threshold.
- the thawing method for the thawing device further includes:
- a visual and/or audible signal is sent to alert the user to no load
- a visual and/or audible signal is sent to alert the user to overload.
- 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 radio frequency generating module When the radio frequency generating module is in an active state, detecting an incident wave signal and a reflected wave signal of the electrical connection;
- 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 further includes:
- the load compensation module does not work.
- the thawing method for the thawing device further includes:
- the step of determining the thawing progress of the to-be-processed object includes:
- the current working power of the radio frequency generating module is reduced by 30% to 40%;
- 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 defrosting switch, and the defrosting switch is disposed on any of the compartment door bodies for controlling start-stop of the defrosting program; wherein the defrosting method for the refrigerator comprises:
- the weighing sensor stops working.
- the invention determines the working power of the radio frequency generating module by the weight of the object to be treated, has better thawing effect, and avoids unnecessary energy waste.
- the invention reminds the user of the no-load when the weight of the object to be treated is too small, thereby avoiding the occurrence of the "air-burning" phenomenon, that is, avoiding the work of the radio frequency generating module under no-load, and reducing the failure rate of the freezing device. And avoid undesired energy consumption.
- the weight of the object to be treated is too large, the user is reminded of the overload, and the phenomenon that the temperature difference is excessively reduced (greater than 3 ° C) due to excessive temperature difference between the inside and the outside of the object to be treated is avoided.
- 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 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 7 is a schematic cross-sectional view of the refrigerator shown in Figure 6;
- Figure 8 is a schematic structural view of the compressor chamber of Figure 7;
- FIG. 9 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.
- a tray 170 may also be disposed in the thawing chamber 114 for carrying the object to be treated.
- the tray 170 may be provided with at least one load cell 171 configured to sense the weight of the object to be processed and confirm the operating power of the radio frequency generating module 130 according to the weight of the object to be processed.
- the present invention determines the working power of the radio frequency generating module 130 by the weight of the object to be treated, has a better thawing effect, and avoids unnecessary energy waste.
- the number of the load cells 171 may be one, two or two or the like.
- the number of load cells 171 is one, and one load cell 171 is disposed at the center of the tray 170. In other embodiments, the number of load cells 171 is plural (two, three or more, etc.), and a plurality of load cells 171 are evenly distributed on the tray 170 so that the tray 170 can be divided into A plurality of areas of equal area, and each area is provided with a load cell 171. In this embodiment, the weight of the object to be treated is an average of the weights sensed in the plurality of load cells 171.
- the radio frequency generating module 130 may be configured to start working when the weight of the object to be processed is within a preset range; when the weight of the object to be processed is not within the preset range, the work does not start.
- the radio frequency generating module 130 can be further configured to be greater than or equal to a first weight threshold and less than a second weight threshold, and its operating power is 75-95% of its rated power, for example, 75%, 80. %, 90% or 95%; when the weight of the object to be treated is greater than or equal to the second weight threshold and less than or equal to a third weight threshold, the operating power is its rated power.
- the first weight threshold is greater than zero, the first weight threshold is less than the second weight threshold, the second weight threshold is less than the third weight threshold, and the preset range is greater than or equal to the first weight threshold being less than or equal to the third weight threshold.
- the first weight threshold may be 0.4 to 0.6 kg, such as 0.4 kg, 0.5 kg or 0.6 kg; the second weight threshold may be 0.9 to 1.1 kg, such as 0.9 kg, 1.0 kg or 1.1 kg;
- the threshold may be 1.4 to 1.6 kg, such as 1.4 kg, 1.5 kg or 1.6 kg;
- the radio frequency generating module 130 may have a rated power of 100 to 150 W, such as 100 W, 120 W, 130 W or 150 W.
- the defrosting device 100 can be configured to issue a visual and/or audible signal to alert the user to no load when the weight of the object to be treated is less than the first weight threshold; when the weight of the object to be treated is greater than the third weight threshold , emitting visual and / or audible signals to alert the user to overload.
- An indicator light and/or an alarm may be disposed on the device door 120 to issue a visual and/or audible signal to alert the user when the object to be treated is too small (less than the first weight threshold) or too large (greater than the third weight threshold) .
- the present invention prevents the user from being idling when the weight of the object to be treated is too small, thereby avoiding the occurrence of the phenomenon of "empty burning", that is, avoiding the work of the radio frequency generating module 130 when it is idling, and reducing the freezing device 100. Failure rate and avoiding undesired energy consumption.
- the weight of the object to be treated is too large, the user is reminded of the overload, and the phenomenon that the temperature difference is excessively reduced (greater than 3 ° C) due to excessive temperature difference between the inside and the outside of the object to be treated is avoided.
- 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 impedance
- U 2 is the reflected wave voltage
- I 2 is the reflected wave current
- R 2 is the output resistance
- X 2 is the load impedance (as understood by those skilled in the art, the output impedance is connected to the radio frequency
- the impedance of the electrical connection between the module 130 and the upper electrode plate 140a, the load impedance is the impedance of the object to be processed).
- 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 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.
- 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 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 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.
- 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 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 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 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:
- the load cell 171 senses the weight of the object to be processed
- S506 Determine the working power of the radio frequency generating module 130.
- the present invention may also provide a refrigerator 10 based on the defrosting apparatus 100 of any of the foregoing embodiments.
- 6 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. Referring to Figures 1, 6 and 7, 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 load cell 171 can be configured to begin operation when the defrosting switch 224 is open and the device door 120 is closed; when the RF generating module 130 begins to operate, the operation is stopped.
- the user can terminate the defrosting procedure by turning off the defrosting switch 224.
- a buzzer (not shown) 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 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.
- An infrared sensor may be disposed on the inner wall of the defrosting chamber 114 to sense whether or not the object to be treated is placed in the defrosting chamber 114.
- 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.
- the refrigerator 10 may be an air-cooled refrigerator, and the temperature change compartment 220 may include a duct cover 222.
- the air duct cover 222 and the rear inner wall of the temperature change compartment 220 form a temperature change air passage, and the air duct cover 222 is provided with a temperature change air inlet 2221 for providing a cooling capacity to the temperature change compartment 220.
- the device air inlet 115 and the variable temperature air inlet 2221 of the defrosting device 100 may be coupled through a connecting tube 223 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 cylinder 110 may be within the variable temperature air inlet 2221 to facilitate cooling of the thawing chamber 114 of the defrosting device 100.
- a temperature-changing air inlet damper may be disposed at the temperature-changing air inlet 2221 to turn on or block the temperature-changing air duct.
- the variable temperature inlet damper can be configured to: when the radio frequency generating module 130 is in the working state, the variable temperature inlet damper is closed, that is, the variable temperature air duct stops providing cooling capacity to the temperature changing compartment 220 to avoid affecting the thawing device 100 to thaw the object to be treated.
- the variable temperature inlet damper is opened, that is, the variable temperature air duct can provide cooling capacity to the variable temperature compartment 220 according to the original refrigeration control program of the refrigerator 10, and the defrosting chamber 114 is used for placing the foodstuff.
- Fig. 8 is a schematic structural view of the compressor chamber 241 of Fig. 7.
- the cabinet 200 of the refrigerator 10 further 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.
- the defrosting method of the refrigerator 10 of the present invention may include the following steps:
- Step S902 It is determined whether the defrosting switch 224 is turned on, and if so, step S904 is performed; if not, step S902 is performed.
- Step S904 The power supply module 242 starts to work.
- Step S906 determining whether the device door 120 is closed, and if so, executing step S908; if not, executing step S906.
- Step S908 The load cell 171 senses the weight of the object to be processed.
- Step S910 Obtain the weight of the object to be processed.
- Step S912 determining whether the weight of the object to be processed is greater than or equal to the first weight threshold, and if yes, executing step S916; if not, executing step S914.
- Step S914 A visual and/or audible signal is issued to alert the user to no load.
- Step S916 determining whether the weight of the object to be processed is greater than or equal to the second weight threshold, and if yes, executing step S918; if not, executing step S922.
- Step S918 determining whether the weight of the object to be processed is greater than the third weight threshold, and if yes, executing step S920; if not, executing step S924.
- Step S922 The radio frequency generating module 130 operates at a rated power of 80%. Step S126 is performed.
- Step S924 The radio frequency generating module 130 operates at a rated power. Step S926 is performed.
- Step S926 The temperature-increasing intake damper is closed, the radio frequency generating module 130 generates a radio frequency signal of 40 to 42 MHz, and the detecting module 150 detects 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.
- the frequency of the radio frequency signal generated by the radio frequency generating module 130 is 40.68 MHz.
- Step S928 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 S930 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 S932; if not, executing step S928.
- Step S932 The current working power of the radio frequency generating module 130 is reduced by 30-40%. In this step, the current operating power of the radio frequency generating module 130 is reduced by 35%.
- Step S934 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 S936 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 S938; if not, executing step S934.
- Step S938 The power supply module 242 stops working, the defrosting switch 224 is reset (ie, turned off), the temperature-increasing air inlet damper is opened, and the buzzer starts to work.
- Step S940 determining whether the object to be processed is taken out from the defrosting chamber, and if so, executing step S942; if not; executing step S938.
- Step S942 The buzzer stops working.
- Step S929 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 RF generating module 130.
- Step S931 It is determined whether the difference between the load impedance Z2 of the radio frequency generating module 130 and the output impedance Z1 is greater than the first impedance threshold. If yes, step S933 is performed; if not, step S935 is performed.
- Step S933 The motor of the load compensation module 160 operates to reduce the impedance of the compensation unit. Go back to step S929.
- Step S935 It is determined whether the difference between the load impedance Z2 of the radio frequency generating module 130 and the output impedance Z1 is less than the second impedance threshold. If yes, step S937 is performed; if not, step S929 is performed.
- Step S937 The motor of the load compensation module 160 operates to increase the impedance of the compensation unit. Go back to step S929.
- 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 is
- 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 thawing workflow of the refrigerator 10 may include: when the user opens the defrosting switch 224, the power supply module 242 starts to supply power, and when the device door 120 is closed, the weighing sensor senses the weight of the object to be processed, according to The weight of the object to be processed determines whether the radio frequency generating module 130 operates and determines the operating power at the time of its operation.
- the RF generating module 130 generates a 40.68 MHz RF signal, the variable temperature inlet damper is closed, the cooling is stopped for the variable temperature compartment, and the detection module 150 and the load compensation module 160 start to work.
- 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 rate of change ⁇ / ⁇ t of the dielectric coefficient of the object to be processed is greater than or equal to the first rate threshold, 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 impedance threshold.
- the power supply module 242 stops supplying power, the defrosting switch 224 is turned off, the variable temperature inlet damper is opened, the radio frequency generating module 130, the detecting module 150 and the load compensation Module 160 stops working and the buzzer starts working.
- the buzzer stops working.
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Abstract
一种用于解冻装置的解冻方法,该解冻装置(100)包括具有解冻腔室(114)的筒体(110)、用于开闭解冻腔室(114)的装置门体(120)、射频发生模块(130)、分别与射频发生模块(130)电连接的上电极板(140a)和下电极板(140b)、设置于解冻腔室(114)内的托盘(170)、以及设置于托盘(170)上的称重传感器(171);该解冻方法包括:称重传感器(171)感测待处理物的重量(S502);获取待处理物的重量(S504);确定射频发生模块(130)的工作功率(S506)。通过待处理物的重量来确定射频发生模块(130)的工作功率,具有更好的解冻效果,并避免了不必要的能源浪费。
Description
本申请要求了申请日为2017年06月06日,申请号为201710419614.7,发明名称为“用于解冻装置的解冻方法”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。
本发明涉及解冻领域,特别是涉及一种用于解冻装置的解冻方法。
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高解冻效率、解冻均匀且可保证食物品质的用于解冻装置的解冻方法。
发明内容
本发明第一方面的一个目的是要提供一种具有较好解冻效果的用于解冻装置的解冻方法。
本发明第一方面的一个进一步的目的是要提高冰箱的解冻效率。
本发明第一方面的另一个进一步的目的是要避免待处理物被过分解冻。
本发明第二方面的一个目的是要提供一种用于冰箱的解冻方法。
特别地,根据本发明的第一方面,提供了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、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、设置于所述解冻腔室内的用于承载所述待处理物的托盘、以及设置于所述托盘上的用于感测所述待处理物的重量的称重传感器;所述解冻方法包括:
所述称重传感器感测所述待处理物的重量;
获取所述待处理物的重量;
确定所述射频发生模块的工作功率。
可选地,所述用于解冻装置的解冻方法还包括:
若所述待处理物的重量处于一预设范围内,则所述射频发生模块开始工作;
若所述待处理物的重量不处于所述预设范围内,则所述射频发生模块不工作。
可选地,所述用于解冻装置的解冻方法还包括:
若所述待处理物的重量大于等于一第一重量阈值且小于一第二重量阈值,则所述射频发生模块的工作功率为额定功率的75~95%;
若所述待处理物的重量大于等于所述第二重量阈值且小于等于一第三重量阈值,则所述射频发生模块的工作功率为额定功率;其中
所述第一重量阈值大于零,所述第一重量阈值小于所述第二重量阈值,所述第二重量阈值小于所述第三重量阈值,且所述预设范围为大于等于所述第一重量阈值小于等于第三重量阈值。
可选地,所述用于解冻装置的解冻方法还包括:
若所述待处理物的重量小于所述第一重量阈值,则发出视觉和/或听觉信号提醒用户空载;
若所述待处理物的重量大于所述第三重量阈值,则发出视觉和/或听觉信号提醒用户超载。
可选地,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:
所述射频发生模块处于工作状态时,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。
可选地,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;所述解冻方法还包括:
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,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;
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。
可选地,所述用于解冻装置的解冻方法还包括:
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。
可选地,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,所述射频发生模块当前的工作功率降低30%~40%;和/或
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。
根据本发明的第二方面,提供了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,所述解冻方法包括以上任一所述的用于解冻装置的解冻方法。
可选的,所述冰箱还包括解冻开关,所述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;其中所述用于冰箱的解冻方法包括:
若所述装置门体关闭且所述解冻开关打开,则所述称重传感器开始工作;
若所述射频发生模块开始工作,则所述称重传感器停止工作。
相比于现有技术中解冻功率一定的解冻方法,本发明通过待处理物的重量来确定射频发生模块的工作功率,具有更好的解冻效果,并避免了不必要的能源浪费。
进一步地,本发明通过在待处理物的重量过小时,提醒用户空载,避免了“空烧”现象的发生,也即是避免了射频发生模块空载时工作,降低了解冻装置的故障率,并避免了不期望地能耗产生。在待处理物的重量过大时,提醒用户过载,避免了由于待处理物内外温差过大(大于3℃)而过分降低其品质的现象发生。
进一步地,本发明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(大于等于一第一阻抗阈值且小于等于一第二阻抗阈值)内,进一步地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,来判断待处理物的解冻进度。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,当待处理物的温度已较高时,将射频发生模块的工作功率降低30~40%,可有效地防止待处理物被过分解冻。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。
图1是根据本发明一个实施例的解冻装置的示意性结构图;
图2是沿图1中的剖切线A-A截取的示意性剖视图;
图3是图1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4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5是根据本发明一个实施例的用于解冻装置的解冻方法的流程图;
图6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,以示出冰箱的箱体内的间室结构;
图7是图6所示冰箱的示意性剖视图;
图8是图7中压缩机室的示意性结构图;
图9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。
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解冻装置100的示意性结构图。参见图1,解冻装置100可包括筒体110、装置门体120、射频发生模块130、以及上电极板140a和下电极板140b。 筒体110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114,解冻腔室114用于放置待处理物。装置门体120可设置于解冻腔室114的前向开口处,用于打开或关闭解冻腔室114。装置门体120可通过适当方法与筒体110安装在一起,例如左开门、右开门或上开门。射频发生模块130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140a和下电极板140b可分别水平地设置于解冻腔室114的顶壁和底壁处,且分别与射频发生模块130电连接,以根据射频发生模块130产生的射频信号在解冻腔室114内产生相应参数的射频波,并解冻放置于解冻腔室114内的待处理物。在本发明中,上电极板140a为发射天线;下电极板140b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140a和下电极板140b分别与射频发生模块130电连接。
解冻腔室114内还可设置有托盘170,用于承载待处理物。特别地,托盘170上可设置有至少一个称重传感器171,配置为感测待处理物的重量,并根据待处理物的重量来确认射频发生模块130的工作功率。相比于现有技术中解冻功率一定的解冻方法,本发明通过待处理物的重量来确定射频发生模块130的工作功率,具有更好的解冻效果,并避免了不必要的能源浪费。在本发明中,称重传感器171的数量可为一个、两个或两个以上等。
在图示实施例中,称重传感器171的数量为一个,且一个称重传感器171设置于托盘170的中心。在另一些实施例中,称重传感器171的数量为多个(两个、三个或三个以上等),且多个称重传感器171均匀分布在托盘170上,以使托盘170可分为面积相等的多个区域,且每个区域内均设置有一个称重传感器171。在该实施例中,待处理物的重量为多个称重传感器171中感测到的重量的平均值。
具体地,射频发生模块130可配置为当待处理物的重量处于一预设范围内时,开始工作;当待处理物的重量不处于预设范围内时,不开始工作。在一些优选实施例中,射频发生模块130可进一步地配置为大于等于一第一重量阈值且小于一第二重量阈值时,其工作功率为其额定功率的75~95%,例如75%、80%、90%或95%;当待处理物的重量大于等于第二重量阈值且小于等于一第三重量阈值时,其工作功率为其额定功率。其中第一重量阈值大于零,第一重量阈值小于第二重量阈值,第二重量阈值小于第三重量阈值,且预设范围为大于等于第一重量阈值小于等于第三重量阈值。在本发明中,第一重量阈值可为0.4~0.6kg,例如0.4kg、0.5kg或0.6kg;第二重量阈值可为0.9~1.1kg,例如0.9kg、1.0kg或1.1kg;第三重量阈值可为1.4~1.6kg,例如1.4kg、1.5kg或1.6kg;射频发生模块130的额定功率可为100~150W,例如100W、120W、130W或150W。
在一些优选实施例中,解冻装置100可配置为当待处理物的重量小于第一重量阈值时,发出视觉和/或听觉信号提醒用户空载;当待处理物的重量大于第三重量阈值时,发出视觉和/或听觉信号提醒用户过载。装置门体120上可设置有指示灯和/或报警器,以在待处理物过小(小于第一重量阈值)或过大(大于第三重量阈值)时发出视觉和/或听觉信号提醒用户。
进一步地,本发明通过在待处理物的重量过小时,提醒用户空载,避免了“空烧”现象的发生,也即是避免了射频发生模块130空载时工作,降低了解冻装置100的故障率,并避免了不期望地能耗的产生。在待处理物的重量过大时,提醒用户过载,避免了由于待处理物内外温差过大(大于3℃)而过分降低其品质的现象发生。
在一些实施例中,解冻装置100还可包括检测模块150。检测模块150可配置为检测连接射频发生模块130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130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为输出阻抗;U
2为反射波电压;I
2为反射波电流;R
2为输出电阻;X
2为负载阻抗(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130与上电极板140a的电连线的阻抗,负载阻抗为待处理物的阻抗)。
解冻装置100还可包括负载补偿模块160。负载补偿模块160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130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130的负载阻抗Z
2,并使射频发生模块130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130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150可配置为进一步根据射频发生模块130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。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4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4,在一些优选实施例中,射频发生模块130可配置为当待处理物的介电系数的变化速率Δε/Δt大于等于第一速率阈值时,其工作功率降低30%~40%,例如30%、35%或40%,以防止待处理物被过度解冻(本领域技术人员均可理解地,过度解冻为待处理物的温度大于0℃)。第一预设阈值可为15~20,例如15、17、18或20。射频发生模块130还可配置为当待处理物的介电系数的变化速率Δε/Δt下降至小于等于第二速率阈值时,停止工作。第二预设阈值可为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,不适用于尺寸较小的解冻装置。本发明通过检测连接射频发生模块130与上极板的电连线的入射波信号和反射波信号,经计算得出待处理物的介电系数,占用空间小且成本低,特别适用于解冻装置。
进一步地,本发明通过检测模块150计算待处理物的介电系数的变化速率,来判断待处理物的解冻进度。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,当待处理物的温度已 较高时,将射频发生模块130的工作功率降低30~40%,可有效地防止待处理物被过分解冻。
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。
图2是沿图1中的剖切线A-A截取的示意性剖视图。参见图1和图2,筒体110还可包括用于限定筒体110的内部空间的竖向隔板111和水平隔板112。竖向隔板111可设置为自筒体110的顶板沿竖向方向延伸至筒体110的底板。射频发生模块130可设置于竖向隔板111和筒体110的后板之间。水平隔板112可设置为自竖向隔板111沿水平方向向前延伸。检测模块150和负载补偿模块160可设置于水平隔板112与筒体110的顶板之间。
解冻腔室114可由竖向隔板111、水平隔板112以及筒体110的底板和两个横向侧板围成。上电极板140a可设置于水平隔板112的下表面,下电极板140b可设置于筒体110的底板的上表面。竖向隔板111可开设有第一过线口1112,以使射频发生模块130经由第一过线口1112与上电极板140a电连接。筒体110还可包括自水平隔板112的前侧端部沿竖向方向向上延伸至筒体110的顶板的挡板113,以防止检测模块150以及负载补偿模块160外露,降低解冻装置100的美观性。
在一些实施例中,筒体110的后板可开设有装置进风口115,解冻腔室114的后侧的竖向隔板111可开设有解冻进风口1111,以使解冻装置100外的空气经由装置进风口115和解冻进风口1111进入至解冻装置100的解冻腔室114。解冻腔室114的横向两侧的侧板可开设有装置出风口118,以使解冻腔室114内的气体经由装置出风口118排出至解冻装置100外。
在一些优选实施例中,解冻装置100的装置进风口115和解冻进风口1111可分别设置于射频发生模块130的横向两侧,以便于射频发生模块130的散热。在一些替代性实施例中,解冻装置100的装置进风口115和解冻进风口1111可设置于射频发生模块130的同一侧。
本发明通过在解冻装置100上设置有装置进风口115和装置出风口118,在未接收到解冻指令时,解冻腔室114可用来放置食材,使解冻装置100内的储物空间得到充分的利用。
托盘170可配置为可受控地在解冻腔室114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170的下表面与下电极板140b的距离可为8~12mm,例如8mm、10mm、12mm,以防止在托盘170抽拉的过程中,与下电极板140b产生摩擦。
图3是图1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。参见图1和图3,筒体110和装置门体120可分别设置有电磁屏蔽特征117。设置于筒体110的电磁屏蔽特征117和设置于装置门体120的电磁屏蔽特征117可导电连接,以在装置门体120关闭时,减少解冻装置100向外的磁泄漏量。电磁屏蔽特征117可为涂覆于筒体110的内壁和装置门体120的内表面(朝向筒体110的表面)的导电涂层、贴靠于筒体110的内壁和装置门体120的内表面的导电金属网或形成于围成筒体110的各个板体之中和装置门体120中的导电金属网等。
在一些优选实施例中,解冻装置100还可包括弹性导电环圈180。弹性导电环圈180可设置于解冻腔室114的前向开口的周缘处,以使其在装置门体120关闭时发生挤压变形,与装置门体120紧密贴合,即弹性导电环圈180与装置门体120之间形成密封。设置于筒体110的电磁屏蔽特征117和设置于装置门体120的电磁屏蔽特征117可分别设置为与弹性导电环圈180导电接触,以在装置门体120关闭时,减少解冻装置100向外的磁泄漏量。
在一些优选实施例中,弹性导电环圈180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180可为空心环状结构,以使其在装置门体120关闭时,与装置门体120紧密贴合。弹性导电环圈180的宽度可为20~30mm,例如20mm、25mm或30mm,以提高解冻装置100的密封性。在一些优选实施例中,解冻装置100的装置进风口115、解冻进风口1111和装置出风口118可均设置有导电金属网190,导电金属网190可设置为与设置于筒体110的电磁屏蔽特征117导电连接,以减少解冻装置100的磁泄漏量。
特别地,在本发明中,射频发生模块130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
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100中,射频波的功率均为100W,解冻装置100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100,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100内的托盘170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100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100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100的解冻效果优于应用现有技术中的射频频率的解冻装置100,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100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100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5是根据本发明一个实施例的用于解冻装置100的解冻方法的流程图。参见图5,本发明的解冻装置100的解冻方法可以包括如下步骤:
S502:称重传感器171感测待处理物的重量;
S504:获取待处理物的重量;
S506:确定射频发生模块130的工作功率。
基于前述任一实施例的解冻装置100,本发明还可提供一种冰箱10。图6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200内的间室结构;图7是图6所示冰箱10的示意性剖视图。参见图1、6和7,冰箱10一般性地可包括限定有至少一个容纳空间的箱体200、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100。在图示实施例中,冰箱10的容纳空间的数量可为三个,分别为冷藏间室210、变温间室220和冷冻间室230,以及分别用于开闭冷藏间室210、变温间室220和冷冻间室230的冷藏门体211、变温门体221和冷冻门体231,解冻装置100设置于变温间室220中。
此外,也可说明的是,本领域技术人员均熟知地,冷藏间室210是指对食材的保藏温度为0~+8℃的储物间室;冷冻间室230是指对食材的保藏温度为-20~-15℃的储物间室;变温间室220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220可包括风道盖板。风道盖板与变温间室220的后向内壁夹置形成变温风道,且风道盖板上开设有变温进风口,用于为变温间室220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与变温进风口可通过一连接管连接,以便于为解冻装置100的解冻腔室114进行制冷。在另一些优选实施例中,解冻装置100的装置进风口115在筒体110的后板的厚度方向上的投影可处于变温进风口内,以便于为解冻装置100的解冻腔室114进行制冷。
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224。称重传感器171可配置为当解冻开关224打开且装置门体120关闭时,开始工作;当射频发生模块130开始工作时,停止工作。在解冻过程中,用户可通过关闭解冻开关224来终止解冻程序。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150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预设阈值时),开始工作;当待处理物从解冻腔室114中取出时,停止工作。解冻腔室114的内壁上可设置有红外传感器,来感测解冻腔室114内是否放置有待处理物。
解冻装置100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该容纳空间内。解冻装置100可通过与容 纳空间竖向两侧的内壁过盈配合或卡接等方式固定在容纳空间中。
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220可包括风道盖板222。风道盖板222与变温间室220的后向内壁夹置形成变温风道,且风道盖板222上开设有变温进风口2221,用于为变温间室220提供冷量。在一些优选实施例中,解冻装置100的装置进风口115与变温进风口2221可通过一连接管223连接,以便于为解冻装置100的解冻腔室114进行制冷。在另一些优选实施例中,解冻装置100的装置进风口115在筒体110的后板的厚度方向上的投影可处于变温进风口2221内,以便于为解冻装置100的解冻腔室114进行制冷。
变温进风口2221处可设置有变温进风风门,用来导通或阻断变温风道。变温进风风门可配置为:当射频发生模块130处于工作状态时,变温进风风门关闭,即变温风道停止为变温间室220提供冷量,以避免对解冻装置100解冻待处理物造成影响;射频发生模块130处于非工作状态时,变温进风风门打开,即变温风道可根据冰箱10的原制冷控制程序为变温间室220提供冷量,解冻腔室114用于放置食材。
图8是图7中压缩机室241的示意性结构图。参见图8,冰箱10的箱体200还限定有压缩机室240。压缩机室240可包括依次设置的用于控制冰箱10运行的主控板243、压缩机241、冷凝水收集结构244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还可包括用于为射频发生模块130供电的供电模块242。供电模块242可设置于冰箱10的压缩机室240内,以便于供电模块242的散热和维修。筒体110的后板可开设有第二过线口116,以使从供电模块242经由第二过线口116与射频发生模块130电连接。供电模块242可固定于压缩机室240的上壁,以便于射频发生模块130与供电模块242的电连接。供电模块242可为ACDC转换器。ACDC转换器可设置为与主控板243电连接,以为射频发生模块130供电。ACDC转换器可设置于主控板243与压缩机241之间,以使供电模块242与主控板243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100的各个部件与冰箱10的控制电路相连是容易实现的。
图9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9,本发明的冰箱10的解冻方法可以包括如下步骤:
步骤S902:判断解冻开关224是否打开,若是,执行步骤S904;若否,执行步骤S902。
步骤S904:供电模块242开始工作。
步骤S906:判断装置门体120是否关闭,若是,执行步骤S908;若否,执行步骤S906。
步骤S908:称重传感器171感测待处理物的重量。
步骤S910:获取待处理物的重量。
步骤S912:判断待处理物的重量是否大于等于第一重量阈值,若是,执行步骤S916;若否,执行步骤S914。
步骤S914:发出视觉和/或听觉信号提醒用户空载。
步骤S916:判断待处理物的重量是否大于等于第二重量阈值,若是,执行步骤S918;若否,执行步骤S922。
步骤S918:判断待处理物的重量是否大于第三重量阈值,若是,执行步骤S920;若否,执行步骤S924。
步骤S922:射频发生模块130以80%的额定功率工作。执行步骤S126。
步骤S924:射频发生模块130以额定功率工作。执行步骤S926。
步骤S926:变温进风风门关闭,射频发生模块130产生40~42MHz的射频信号,检测模块150检测连接射频发生模块130与上极板140a的电连线的入射波信号和反射波信号。在该步骤中,射频发生模块130产生的射频信号的频率为40.68MHz。运行步骤S928和步骤S929。
步骤S928: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S930:判断待处理物的介电系数的变化速率Δε/Δt是否大于等于第一速率阈值,若是,执行步骤S932;若否,执行步骤S928。
步骤S932:射频发生模块130当前的工作功率降低30~40%。在该步骤中,射频发生模块130当前的工作功率降低35%。
步骤S934: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S936:判断待处理物的介电系数的变化速率Δε/Δt是否小于等于第二速率阈值,若是,执行步骤S938;若否,执行步骤S934。
步骤S938:供电模块242停止工作,解冻开关224复位(即关闭),变温进风风门打开,蜂鸣器开始工作。
步骤S940:判断待处理物是否从解冻腔室内取出,若是,执行步骤S942;若否;执行步骤S938。
步骤S942:蜂鸣器停止工作。
步骤S929: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130的负载阻抗Z2。
步骤S931:判断射频发生模块130的负载阻抗Z2与输出阻抗Z1的差值是否大于第一阻抗阈值,若是,执行步骤S933;若否,执行步骤S935。
步骤S933:负载补偿模块160的电机工作,减小补偿单元的阻抗。返回步骤S929。
步骤S935:判断射频发生模块130的负载阻抗Z2与输出阻抗Z1的差值是否小于第二阻抗阈值,若是,执行步骤S937;若否,执行步骤S929。
步骤S937:负载补偿模块160的电机工作,增大补偿单元的阻抗。返回步骤S929。(本领域技术人员可以理解地,当程序运行至步骤S938时,供电模块242停止工作,即停止供电,射频发生模块130、检测模块150以及负载补偿模块160均停止工作,即当待处理物的介电系数的变化速率Δε/Δt下降至小于等于第二速率阈值时,检测模块150停止检测连接射频发生模块130与上极板140a的电连线的入射波信号和反射波信号,负载补偿模块160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224时,供电模块242开始供电,当装置门体120关闭时,称重传感器感测待处理物的重量,根据待处理物的重量判断射频发生模块130是否工作,并确定其工作时的工作功率。射频发生模块130产生40.68MHz的射频信号,变温进风风门关闭,停止为变温间室提供冷量,检测模块150和负载补偿模块160开始工作。检测模块150检测连接射频发生模块130与上极板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130的负载阻抗Z
2及介电系数的变化速率Δε/Δt。当待处理物的介电系数的变化速率Δε/Δt大于等于第一速率阈值时,射频发生模块130的工作功率降低35%,同时,在整个解冻工作流程中,当射频发生模块130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160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130的负载阻抗Z
2,使射频发生模块130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阻抗阈值。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242停止供电,解冻开关224关闭,变温进风风门打开,射频发生模块130、检测模块150和负载补偿模块160停止工作,蜂鸣器开始工作。当用户从解冻腔室114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)
- 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、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、设置于所述解冻腔室内的用于承载所述待处理物的托盘、以及设置于所述托盘上的用于感测所述待处理物的重量的称重传感器;所述解冻方法包括:所述称重传感器感测所述待处理物的重量;获取所述待处理物的重量;确定所述射频发生模块的工作功率。
- 根据权利要求1所述的用于解冻装置的解冻方法,还包括:若所述待处理物的重量处于一预设范围内,则所述射频发生模块开始工作;若所述待处理物的重量不处于所述预设范围内,则所述射频发生模块不工作。
- 根据权利要求2所述的用于解冻装置的解冻方法,还包括:若所述待处理物的重量大于等于一第一重量阈值且小于一第二重量阈值,则所述射频发生模块的工作功率为额定功率的75~95%;若所述待处理物的重量大于等于所述第二重量阈值且小于等于一第三重量阈值,则所述射频发生模块的工作功率为额定功率;其中所述第一重量阈值大于零,所述第一重量阈值小于所述第二重量阈值,所述第二重量阈值小于所述第三重量阈值,且所述预设范围为大于等于所述第一重量阈值小于等于第三重量阈值。
- 根据权利要求3所述的用于解冻装置的解冻方法,还包括:若所述待处理物的重量小于所述第一重量阈值,则发出视觉和/或听觉信号提醒用户空载;若所述待处理物的重量大于所述第三重量阈值,则发出视觉和/或听觉信号提醒用户超载。
- 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:所述射频发生模块处于工作状态时,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5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;所述解冻方法还包括: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,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;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5所述的用于解冻装置的解冻方法,还包括: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7所述的用于解冻装置的解冻方法,其中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,所述射频发生模块当前的工作功率降低30%~40%;和/或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,所述冰箱还包括解冻开关,所述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;其中所述用于冰箱的解冻方法包括:若所述装置门体关闭且所述解冻开关打开,则所述称重传感器开始工作;若所述射频发生模块开始工作,则所述称重传感器停止工作。
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CN111365937A (zh) * | 2018-12-25 | 2020-07-03 | 青岛海尔股份有限公司 | 冰箱解冻控制方法、冰箱、可读取存储介质及控制器 |
CN111955642A (zh) * | 2020-08-24 | 2020-11-20 | 长虹美菱股份有限公司 | 一种基于重量的解冻方法 |
CN112799337A (zh) * | 2021-04-14 | 2021-05-14 | 成都沃特塞恩电子技术有限公司 | 射频解冻控制***及方法 |
CN114383971A (zh) * | 2022-01-19 | 2022-04-22 | 河南中原光电测控技术有限公司 | 一种称重式蒸发传感器的计算方法 |
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