CN109000420A - Thawing apparatus and refrigerator with the thawing apparatus - Google Patents
Thawing apparatus and refrigerator with the thawing apparatus Download PDFInfo
- Publication number
- CN109000420A CN109000420A CN201710420171.3A CN201710420171A CN109000420A CN 109000420 A CN109000420 A CN 109000420A CN 201710420171 A CN201710420171 A CN 201710420171A CN 109000420 A CN109000420 A CN 109000420A
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- thawing apparatus
- cylinder
- radio frequency
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- 238000010257 thawing Methods 0.000 title claims abstract description 193
- 230000008859 change Effects 0.000 claims description 28
- 238000001514 detection method Methods 0.000 claims description 26
- 230000004308 accommodation Effects 0.000 claims description 12
- 238000009429 electrical wiring Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000017525 heat dissipation Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 235000013305 food Nutrition 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 238000001816 cooling Methods 0.000 description 9
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000007710 freezing Methods 0.000 description 8
- 230000008014 freezing Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000005057 refrigeration Methods 0.000 description 7
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- 235000013372 meat Nutrition 0.000 description 2
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- 230000007306 turnover Effects 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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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
- F25D23/00—General constructional features
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/46—Dielectric heating
- H05B6/48—Circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/46—Dielectric heating
- H05B6/62—Apparatus for specific applications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/02—Refrigerators including a heater
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Freezing, Cooling And Drying Of Foods (AREA)
- Constitution Of High-Frequency Heating (AREA)
Abstract
The present invention provides a kind of thawing apparatus.The thawing apparatus includes: the cylinder for defining the defrosting chamber for placing object to be processed with forward opening；The device door body for being used to be opened and closed defrosting chamber being set at the forward opening of defrosting chamber；Module occurs for the radio frequency for being configured to generate radiofrequency signal；It horizontally is arranged at the roof and bottom wall of defrosting chamber respectively, and the electric pole plate and lower electrode plate that module is electrically connected occurs with radio frequency respectively, the rf wave of corresponding frequencies, and the indoor object to be processed of the chamber that thaws are generated in defrosting chamber according to radiofrequency signal；The vertical baffle for extending to the top plate of cylinder with transverse direction in the vertical direction from the top plate of cylinder is provided in its middle cylinder body；And radio frequency occurs module and is set between vertical baffle and the back plate of cylinder, defrosting chamber is set to the front side of vertical baffle.Thawing apparatus of the invention has biggish pick-and-place mouth, improves the convenience that user picks and places object to be processed.
Description
Technical field
The present invention relates to defrosting fields, more particularly to a kind of thawing apparatus and with the refrigerator of the thawing apparatus.
Background technique
During freezing, the quality of food is kept food, however the food freezed is before processing or is edible
It needs to thaw.For the ease of user's freezing and thawed foodstuff, the prior art in refrigerator generally by being arranged heating device or micro-
Wave apparatus carrys out thawed foodstuff.
However, generally requiring longer thawing time by heating device come thawed foodstuff, and thawing time and temperature are not
It easily grasps, be easy to cause moisture evaporation and the juice loss of food, the quality of food is made to incur loss；It is solved by microwave device
Freeze food, speed is fast, high-efficient, so the nutrient component damages of food are very low, but due to microwave to water and ice penetrate and
Absorption has difference, and the inner material of food is unevenly distributed, and the energy that the region melted absorbs is more, and it is uneven to be also easy to produce defrosting
The problem of uniform hot-spot.Comprehensively consider, needs one kind that there is high defrosting efficiency in design, thaws uniformly and can guarantee and eat
The thawing apparatus and refrigerator of article matter.
Summary of the invention
One purpose of first aspect present invention is to provide for a kind of thawing apparatus convenient for picking and placing object to be processed.
One of first aspect present invention is further objective is that will avoid object to be processed from excessively being thawed.
One purpose of second aspect of the present invention is to provide for a kind of refrigerator with the thawing apparatus.
Particularly, according to the first aspect of the invention, a kind of thawing apparatus is provided, comprising:
Cylinder inside defines the defrosting chamber with forward opening, and the defrosting chamber is for placing object to be processed；
Device door body is set at the forward opening of the defrosting chamber, for being opened and closed the defrosting chamber；
Module occurs for radio frequency, is configured to generate radiofrequency signal；With
Electric pole plate and lower electrode plate, horizontally are arranged at respectively at the roof and bottom wall of the defrosting chamber, and respectively
Module occurs with the radio frequency to be electrically connected, to generate the radio frequency of corresponding frequencies in the defrosting chamber according to the radiofrequency signal
Wave, and the indoor object to be processed of the defrosting chamber that thaws；Wherein
It is provided in the cylinder from the top plate of the cylinder and extends to the cylinder with transverse direction in the vertical direction
The vertical baffle of top plate；And the radio frequency occurs module and is set between the vertical baffle and the back plate of the cylinder, it is described
Defrosting chamber is set to the front side of the vertical baffle.
Optionally, the back plate of the cylinder, which offers, offers defrosting air inlet on device air inlet and the vertical baffle
Mouthful, so that the air outside the thawing apparatus enters to the defrosting chamber via described device air inlet and the defrosting air inlet
Room；And
The side plate of the both lateral sides of the defrosting chamber offers device air outlet, so that the indoor gas of defrosting chamber
It is expelled to outside the thawing apparatus via device air outlet.
Optionally, described device air inlet and the defrosting air inlet are respectively arranged at the transverse direction that module occurs for the radio frequency
Two sides, in order to which the heat dissipation of module occurs for the radio frequency.
Optionally, the thawing apparatus further include:
Pallet is set in the defrosting chamber, to carry the object to be processed；And
The tray arrangement be can the depth direction controllably along the defrosting chamber move, in order to the object to be processed
Placement and taking-up.
Optionally, the lower surface of the pallet is 8~12mm at a distance from the lower electrode plate, to prevent the pallet from existing
In mobile process, friction is generated with the lower electrode plate.
Optionally, the thawing apparatus further include:
Detection module is configured to detection and connects the incidence wave that the electrical wiring of module and the electric pole plate occurs for the radio frequency
Signal and reflection wave signal, and according to the voltage and current of the incidence wave signal and the voltage of the reflection wave signal and
Electric current calculates the rate of change of the dielectric coefficient of the object to be processed.
Optionally, the cylinder further include:
Horizontal baffle is set as extending forward in the horizontal direction from the vertical baffle, and the detection module is set to institute
It states between horizontal baffle and the top plate of the cylinder；And
The electric pole plate is set to the lower surface of the horizontal baffle, and the lower electrode plate is set to the bottom of the cylinder
The upper surface of plate.
Optionally, the radio frequency generation module is configured that
When the rate of change of the dielectric coefficient of the object to be processed is more than or equal to first rate threshold value, operating power drop
Low 30%~40%, to prevent the object to be processed from excessively being thawed；And/or
When the rate of change of the dielectric coefficient of the object to be processed drops below or equal to the second rate-valve value, stop work
Make.
According to the second aspect of the invention, a kind of refrigerator is provided, the cabinet including defining at least one accommodation space
With the thawing apparatus of any description above, it is set in the accommodation space.
Optionally, the cabinet is further defined with the compressor room for placing compressor, wherein the refrigerator further include:
Power supply module is set to the compressor room, for module for power supply to occur for the radio frequency.
The present invention is sent out radio frequency by being provided with the vertical baffle extended in the vertical direction with transverse direction in cylinder
Raw module is arranged between vertical baffle and the back plate of cylinder, so that thawing apparatus has biggish pick-and-place mouth, improves user
Pick and place the convenience of object to be processed.
Further, the present invention is also provided with horizontal baffle on front side of vertical baffle, and will test module and be arranged in water
Between flat partition board and the top plate of cylinder, not only make the compact-sized of thawing apparatus, the electrical connection being also convenient between each component.
Further, the present invention calculates the rate of change of the dielectric coefficient of object to be processed by detection module, come judge to
The defrosting progress of processed material.Before making the present invention, those skilled in the art are it is believed that the temperature when object to be processed is higher
When (temperature of object i.e. to be processed is more than or equal to -7 DEG C), fuel factor can significantly decay, thus object to be processed will not excessively be thawed.
However actual conditions are really not so, usual radio frequency defrosting power is larger, be greater than 100W, when object to be processed self-temperature
When higher, object to be processed is easily excessively thawed.Present inventor creatively recognizes, when object to be processed temperature
When higher, the operating power that module occurs for radio frequency is reduced by 30~40%, object to be processed can be effectively prevented and excessively thawed.Into
One step, whether the present invention judges to thaw by the rate of change of the dielectric coefficient of object to be processed completes, compared with the prior art
In judge to thaw by sensing the temperature of object to be processed and whether complete, it is more accurate to judge, can further prevent object to be processed
It is excessively thawed, and test shows the object to be processed to be thawed by thawing apparatus of the invention, the temperature thawed when completing is general
It is -4~-2 DEG C, can avoid thawing when object to be processed is meat and generating watery blood.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing:
Fig. 1 is the schematic diagram of thawing apparatus according to an embodiment of the invention；
Fig. 2 is the schematic cross sectional views of the cutting line A-A interception in Fig. 1；
Fig. 3 is the schematic diagram of thawing apparatus in Fig. 1, and wherein the device door body of the thawing apparatus is removed, to show
The internal structure of cylinder out；
Fig. 4 is the rate of change curve graph of the dielectric coefficient of object to be processed according to an embodiment of the invention；
Fig. 5 is the schematic diagram of refrigerator according to an embodiment of the invention, wherein all outer door body of the refrigerator
It is all removed, with cell structure between showing in refrigerator body；
Fig. 6 is the schematic cross sectional views of refrigerator shown in Fig. 5；
Fig. 7 is the schematic diagram of Tu6Zhong compressor room；
Fig. 8 is the flow chart of the defreezing method according to an embodiment of the invention for refrigerator.
Specific embodiment
Fig. 1 is the schematic diagram of thawing apparatus 100 according to an embodiment of the invention.Referring to Fig. 1, thawing apparatus
100 may include cylinder 110, device door body 120, radio frequency generation module 130 and electric pole plate 140a and lower electrode plate 140b.
Cylinder 110 may include top plate and bottom plate, back plate and two opposite lateral side plates, in can define with forward opening
Defrosting chamber 114, defrosting chamber 114 is for placing object to be processed.Device door body 120 may be disposed at the forward direction of defrosting chamber 114
Opening is used to open or closes defrosting chamber 114.Device door body 120 can be mounted on one by proper method and cylinder 110
It rises, such as L.H.flapped door, R.H.flapped door or upward-acting door.Radio frequency generation module 130 can be configured to generation radiofrequency signal and (refer generally to frequency to exist
The radiofrequency signal of 300KHz~300GHz).Electric pole plate 140a and lower electrode plate 140b can horizontally be arranged at defrosting chamber respectively
At the roof and bottom wall of room 114, and module 130 occurs with radio frequency respectively and is electrically connected, to occur what module 130 generated according to radio frequency
Radiofrequency signal generates the rf wave of relevant parameter in defrosting chamber 114, and thaw be placed in it is to be processed in defrosting chamber 114
Object.In the present invention, electric pole plate 140a is transmitting antenna；Lower electrode plate 140b is receiving antenna.In some embodiments, may be used
Make electric pole plate 140a and lower electrode plate 140b that module 130 occur with radio frequency respectively using 50 ohm of electrical wiring to be electrically connected.
Particularly, cylinder 110 may also include the vertical baffle 111 of the inner space for limiting cylinder 110.Vertical baffle
111 may be configured as the top plate from cylinder 110, and the bottom plate of cylinder 110 is extended to along the vertical direction and transverse direction of cylinder 110.
Module 130, which occurs, for radio frequency may be disposed between vertical baffle 111 and the back plate of cylinder 110.Defrosting chamber 114 be defined in vertically every
The front side of plate 111.
The present invention is incited somebody to action by being provided with the vertical baffle 111 extended in the vertical direction with transverse direction in cylinder 110
Radio frequency occurs module 130 and is arranged between vertical baffle 111 and the back plate of cylinder 110, so that thawing apparatus 100 is with biggish
Mouth is picked and placed, the convenience that user picks and places object to be processed is improved.
In some embodiments, thawing apparatus 100 may also include detection module 150.Detection module 150 can be configured to detect
The electrical wiring of module 130 and electric pole plate occurs for radio frequency incidence wave signal and reflection wave signal are connected, and is believed according to incidence wave
Number voltage and current and reflection wave signal voltage and current, calculate radio frequency occur module 130 load impedance.Load
The calculation formula of impedance is as follows:
SWR=Z2/Z1 (1)
Z1=U1/I1=R1+jX1 (2)
Z2=U2/I2=R2+jX2 (3)
In formula (1), (2), (3): SWR is standing-wave ratio；Z1For output impedance；Z2For load impedance；U1For incidence wave electricity
Pressure；I1For incidence wave electric current；R1For output resistance；X1For output reactance；U2For reflected wave voltage；I2For back wave electric current；R2For
Load resistance；X2For load reactance, (understandably, output impedance is that module 130 occurs for connection radio frequency to those skilled in the art
With the impedance of the electrical wiring of electric pole plate 140a, load impedance is the impedance of object to be processed).
Thawing apparatus 100 may also include load compensation module 160.Load compensation module 160 may include a compensating unit and
For adjusting the motor of the impedance of compensating unit.Compensating unit may be configured as connecting with object to be processed, i.e., mould occurs for radio frequency at this time
The load impedance of block 130 be object to be processed impedance and compensating unit impedance and.Motor can be configured to controllably to increase or
Reduce the impedance of compensating unit, and then increases or reduces the load impedance Z that module 130 occurs for radio frequency2, and make radio frequency that module occur
130 load impedance Z2With output impedance Z1Difference (i.e. load impedance Z2Subtract output impedance Z1Obtained numerical value) it is more than or equal to
One first impedance threshold and it is less than or equal to one second impedance threshold, and the first impedance threshold is less than the second impedance threshold, to improve
The defrosting efficiency of object to be processed.In some preferred embodiments, the first impedance threshold is output impedance Z1- 6~-4%, second
Impedance threshold is output impedance Z14~6%.It is further preferred that the first impedance threshold is output impedance Z1- 5%, second
Impedance threshold is output impedance Z15%.In other words, load compensation module can be configured to make radio frequency that the negative of module 130 occur
Carry impedance Z2With output impedance Z1Absolute value of the difference, output impedance Z is always less than in entire course of defrosting15%, such as
It can be output impedance Z11%, 3% or 5%.
Detection module 150 can be configured to the load impedance Z that module 130 further occurs according to radio frequency2, calculate object to be processed
Dielectric coefficient and dielectric coefficient rate of change, to judge the defrosting progress of object to be processed.The dielectric coefficient of object to be processed
Calculation formula is as follows:
X2=1/2 π fC (4)
The π of ε=4 KdC/S (5)
In formula (4), (5): f is the frequency of rf wave；C is the electricity that electric pole plate 140a and lower electrode plate 140b is constituted
The capacitor of container；ε is the dielectric coefficient of object to be processed；K is dielectric constant；D is the thickness of electric pole plate；S is electric pole plate
Area.
The rate of change of the dielectric coefficient of object to be processed can pass through the variation of the dielectric coefficient ε in unit of account time Δ t
It is worth Δ ε to obtain, wherein unit time Δ t can be 0.1 second~1 second, such as 0.1 second, 0.5 second or 1 second.Fig. 4 is according to the present invention
(ordinate is the change of the dielectric coefficient of object to be processed to the rate of change curve graph of the dielectric coefficient of the object to be processed of one embodiment
Change rate Δ ε/Δ t；Abscissa is the thawing time t, unit min of object to be processed).Referring to fig. 4, in some preferred embodiments
In, module 130, which occurs, for radio frequency can be configured to be more than or equal to the first speed as rate of change Δ ε/Δ t of the dielectric coefficient of object to be processed
When rate threshold value, operating power reduces by 30%~40%, such as 30%, 35% or 40%, to prevent object to be processed from excessively being solved
Freeze (those skilled in the art understandably, excessively thaw and are greater than 0 DEG C for the temperature of object to be processed).First rate threshold value can be
15~20, such as 15,17,18 or 20.Module 130, which occurs, for radio frequency may be additionally configured to when the variation of the dielectric coefficient of object to be processed is fast
When rate Δ ε/Δ t drops below or equal to the second rate-valve value, stop working.Second rate-valve value can be 1~2, such as 1,1.5
Or 2.
With the temperature change of object to be processed, the dielectric coefficient of object to be processed can also change therewith, be those skilled in the art
Member is known, however dielectric coefficient is usually measured by special instrument (such as dielectric coefficient tester), and special instrument occupies sky
Between it is big, at high cost, be not suitable for the lesser thawing apparatus of size.The present invention by detection connection radio frequency occur module 130 with it is upper
The incidence wave signal and reflection wave signal of the electrical wiring of electrode plate, are computed the dielectric coefficient for obtaining object to be processed, occupied space
It is small and at low cost, especially suitable for thawing apparatus.The present invention makes radio frequency that the negative of module 130 occur by load compensation module 160
The difference for carrying impedance and output impedance is in a preset range (more than or equal to one first impedance threshold and less than or equal to one second impedance
Threshold value) in, improve the defrosting efficiency of object to be processed.
Further, the present invention calculates the rate of change of the dielectric coefficient of object to be processed by detection module 150, to judge
The defrosting progress of object to be processed.Before making the present invention, those skilled in the art are it is believed that the temperature when object to be processed is higher
When (temperature of object i.e. to be processed is more than or equal to -7 DEG C), fuel factor can significantly decay, thus object to be processed will not excessively be thawed.
However actual conditions are really not so, usual radio frequency defrosting power is larger, be greater than 100W, when object to be processed self-temperature
When higher, object to be processed is easily excessively thawed.Present inventor creatively recognizes, when object to be processed temperature
When higher, the operating power that module 130 occurs for radio frequency is reduced by 30~40%, object to be processed can be effectively prevented and decomposed excessively
Freeze.Further, whether the present invention judges to thaw and complete by the rate of change of the dielectric coefficient of object to be processed, compared to existing
Judge to thaw whether complete by sensing the temperature of object to be processed in technology, it is more accurate to judge, can further prevent wait locate
Reason object is excessively thawed, and test shows the object to be processed to be thawed by thawing apparatus of the invention, the temperature one thawed when completing
As be -4~-2 DEG C, can avoid when object to be processed be meat when, thaw generate watery blood.
In some embodiments, cylinder 110 may also include horizontal baffle 112.Horizontal baffle 112 may be configured as from vertically every
Plate 111 extends forward in the horizontal direction.Detection module 150 and load compensation module 160 may be disposed at horizontal baffle 112 and cylinder
Between 110 top plate, not only make the compact-sized of thawing apparatus 100, the electricity being also convenient between each component of thawing apparatus 100
Connection.Defrosting chamber 114 can be enclosed by vertical baffle 111, the bottom plate of horizontal baffle 112 and cylinder 110 and two lateral side plates
At.Electric pole plate 140a may be disposed at the lower surface of horizontal baffle 112, and lower electrode plate 140b may be disposed at the bottom plate of cylinder 110
Upper surface.Vertical baffle 111 can offer the first thread passing port 1112, so that module 130 occurs for radio frequency via the first thread passing port
1112 are electrically connected with electric pole plate 140a.Cylinder 110 may also include upward in the vertical direction from the anterior end of horizontal baffle 112
The baffle 113 of the top plate of cylinder 110 is extended to, to prevent detection module 150 and load compensation module 160 exposed, reduces solution
Freeze the aesthetics of device 100.
Fig. 2 is the schematic cross sectional views of the cutting line A-A interception in Fig. 1.Referring to Fig. 1 and Fig. 2, in some embodiments
In, the back plate of cylinder 110 can offer device air inlet 115, and the vertical baffle 111 of the rear side of defrosting chamber 114 can offer
Defrosting air inlet 1111, so that the air outside thawing apparatus 100 is entered to via device air inlet 115 and defrosting air inlet 1111
The defrosting chamber 114 of thawing apparatus 100.The side plate of the both lateral sides of cylinder 110 can offer device air outlet 118, so that solution
The gas frozen in chamber 114 is expelled to outside thawing apparatus 100 via device air outlet 118.
In some preferred embodiments, the device air inlet 115 of thawing apparatus 100 and defrosting air inlet 1111 can be set respectively
The both lateral sides that module 130 occurs for radio frequency are placed in, in order to which the heat dissipation of module 130 occurs for radio frequency.In some alternate embodiments
In, the device air inlet 115 and defrosting air inlet 1111 of thawing apparatus 100 may be disposed at the same side that module 130 occurs for radio frequency.
The present invention is not being received by being provided with device air inlet 115 and device air outlet 118 on thawing apparatus 100
To when defrosting instruction, defrosting chamber 114 can be used to place food materials, and the storage space in thawing apparatus 100 is made to obtain sufficient benefit
With.
Thawing apparatus 100 may also include pallet 170.Pallet 170 is set in defrosting chamber 114, and object to be processed is placed
In on pallet 170.Pallet 170 can be configured to controllably to move on the depth direction of defrosting chamber 114, in order to be processed
The placement and taking-up of object.In some preferred embodiments, the lower surface of pallet 170 at a distance from lower electrode plate 140b can for 8~
12mm, such as 8mm, 10mm, 12mm generate friction with lower electrode plate 140b to prevent during 170 pull of pallet.
Fig. 3 is the schematic diagram of thawing apparatus 100 in Fig. 1, wherein 120 quilt of device door body of the thawing apparatus 100
Removal, to show the internal structure of cylinder 110.Referring to Fig. 1 and Fig. 3, cylinder 110 and device door body 120 can be respectively arranged with electricity
Magnetic screen feature 117.It is set to the electromagnetic shielding feature 117 of cylinder 110 and is set to the electromagnetic shielding feature of device door body 120
117 electrically conductive connections, to reduce the outside magnetic dispersion amount of thawing apparatus 100 when device door body 120 is closed.Electromagnetic shielding is special
Sign 117 can apply for the inner wall coated on cylinder 110 and the conductive of the inner surface (towards the surface of cylinder 110) of device door body 120
Layer is posted by the conductive metal mesh of the inner wall of cylinder 110 and the inner surface of device door body 120 or is formed in and surrounds cylinder 110
Conductive metal mesh etc. in the neutralization device gate body 120 of each plate body.
In some preferred embodiments, thawing apparatus 100 may also include elastic conduction ring 180.Elastic conduction ring 180
It may be disposed at the peripheral region of the forward opening of defrosting chamber 114, so that it is squeezed and deformed when device door body 120 is closed,
It is fitted closely with device door body 120, i.e., forms sealing between elastic conduction ring 180 and device door body 120.It is set to cylinder
110 electromagnetic shielding feature 117 and the electromagnetic shielding feature 117 for being set to device door body 120 can be respectively set to and elastic conducting
Electric 180 conductive contact of ring, to reduce the outside magnetic dispersion amount of thawing apparatus 100 when device door body 120 is closed.Some
In preferred embodiment, elastic conduction ring 180 can by silicone, silicone fluoride, EPDM, fluorocarbon-fluorine compound with
And silver coated aluminum is made.Elastic conduction ring 180 can be hollow annular construction so that its device door body 120 close when, with device
Door body 120 fits closely.The width of elastic conduction ring 180 can be 20~30mm, such as 20mm, 25mm or 30mm, to improve
The leakproofness of thawing apparatus 100.In some preferred embodiments, the device air inlet 115 of thawing apparatus 100, defrosting air inlet
1111 and device air outlet 118 can be provided with conductive metal mesh 190, conductive metal mesh 190 may be configured as and be set to cylinder
110 electromagnetic shielding feature 117 is conductively connected, to reduce the magnetic dispersion amount of thawing apparatus 100.
Particularly, in the present invention, the frequency for the radiofrequency signal that module 130 generates occurs for radio frequency (i.e. for thawing wait locate
Manage the electromagnetic wave of object) can be 40~42MHz, such as 40MHz, 40.48MHz, 40.68MHz, 41MHz or 42MHz, with reduce to
The thawing time of processed material improves the temperature uniformity of object to be processed and reduces its juice loss rate.In a preferred embodiment, it penetrates
The frequency of frequency wave can be a preset fixed frequency within the scope of 40.48~40.68MHz, further to reduce object to be processed
Thawing time improves the temperature uniformity of object to be processed and reduces its juice loss rate.Wherein, when the frequency of rf wave is
When 40.68MHz, defrosting effect is best.
For a further understanding of the present invention, the preferred embodiments of the invention are carried out below with reference to more specific embodiment
Description, however, the present invention is not limited to these examples.
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Comparative example 1 | Comparative example 2 | |
| Frequency (MHz) | 40 | 40.48 | 40.68 | 41 | 42 | 13.56 | 27.12 |
It is respectively arranged in the thawing apparatus 100 of the rf frequency of above-described embodiment 1-5 and comparative example 1-2, rf wave
Power is 100W, and the structure and its workflow of thawing apparatus 100 are all the same.
Thawing apparatus 100 to the frequency for being provided with each embodiment and each comparative example, carries out defrosting measure of merit.Test is said
It is bright: to select 1kg shape specification identical, and initial temperature is -18 DEG C of beef, be respectively placed in each embodiment and each comparative example
On pallet 170 in thawing apparatus 100, thawing time, temperature uniformity and the liquid of each embodiment and each comparative example are measured respectively
Juice turnover rate.Wherein thawing time be from thaw, until thawing apparatus 100 judgement thaw complete (i.e. radio frequency generation module 130
Stop working) time；Temperature uniformity: after the completion of defrosting, the temperature of four corners of beef and central point is measured respectively, and is counted
The difference of the average value of central point temperature and four corners is calculated, temperature uniformity is the ratio of the difference and the average value；Juice
Turnover rate: the weight after measuring weight and defrosting before beef thaws respectively, and the two difference is calculated, juice loss rate is the difference
The ratio of value and the weight before beef defrosting.
According to embodiment 1-7 and according to the defrosting measure of merit result such as table 2 of comparative example 1-2.
Table 2
| Thawing time (min) | Temperature uniformity | Juice loss rate (%) | |
| Embodiment 1 | 19 | 0.4 | 0.35 |
| Embodiment 2 | 18 | 0.4 | 0.32 |
| Embodiment 3 | 18 | 0.3 | 0.29 |
| Embodiment 4 | 19 | 0.5 | 0.35 |
| Embodiment 5 | 20 | 0.5 | 0.40 |
| Comparative example 1 | 25 | 0.6 | 0.35 |
| Comparative example 2 | 23 | 0.6 | 0.40 |
It is identical to can be seen that the power in rf wave according to the test result of embodiment 5 in table 2 and comparative example 1, and thaws
In the case that the structure and its workflow of device 100 are all the same, under same test condition, using range of embodiment of the invention
The defrosting effect of the thawing apparatus 100 of interior rf frequency is better than the thawing apparatus 100 of application rf frequency in the prior art,
The former reduces 20% than the thawing time of the latter, and temperature uniformity improves 17%.
It can be seen that the thawing apparatus 100 using various embodiments of the present invention according to the test result of embodiment 1-5 in table 2
Thawing time in 20min hereinafter, temperature uniformity is 0.5 hereinafter, juice loss rate is below 0.40%.By into
The frequency (such as rf frequency is in 40.48~40.68MHz) of the preferred rf wave of one step, can be by the thawing time of thawing apparatus 100
It reduces to 18min hereinafter, temperature uniformity is improved to 0.4 hereinafter, juice loss rate is reduced to 0.32% or less.
A kind of refrigerator 10 can also be provided in thawing apparatus 100 based on aforementioned any embodiment, the present invention.Fig. 5 is according to this
The schematic diagram of the refrigerator 10 of invention one embodiment, wherein all outer door body of the refrigerator 10 are all removed, to show
Cell structure between in the cabinet 200 of refrigerator 10；Fig. 6 is the schematic cross sectional views of refrigerator 10 shown in Fig. 5.Referring to Fig. 1,5 and 6, ice
Case 10 generally may include the cabinet 200 for defining at least one accommodation space, for being opened and closed each accommodation space respectively
The compartment door body of mouth is picked and placed, and is set to the thawing apparatus 100 of an accommodation space.In the illustrated embodiment, thawing apparatus
100 quantity is one.The quantity of the accommodation space of refrigerator 10 can be three, respectively refrigerator room 210, alternating temperature compartment 220
With freezing compartment 230, and be respectively used to opening and closing refrigerator room 210, alternating temperature compartment 220 and freezing compartment 230 refrigeration door body
211, alternating temperature door body 221 and freezing door body 231, thawing apparatus 100 are set in alternating temperature compartment 220.Thawing apparatus 100 can pass through
It is fixed in alternating temperature compartment 220 with modes such as the inner wall interference fit of the vertical two sides of alternating temperature compartment 220 or clampings.
In addition, also illustratable be, knownly, refrigerator room 210 refers to the preservation to food materials to those skilled in the art
The storage room that temperature is 0~+8 DEG C；The storing that it is -20~-15 DEG C between the preservation temperature of food materials that freezing compartment 230, which refers to,
Room；Alternating temperature compartment 220 refer to can to a wide range (such as adjusting range can at 4 DEG C or more, and be adjustable to 0 DEG C or more or 0 DEG C with
Under) change the storage room of its preservation temperature, its general preservation temperature may span across refrigeration, soft freezing (generally -4~0 DEG C) and
Cryogenic temperature, preferably -16~+4 DEG C.
The back plate of cylinder 110 can there are gaps with the rear wall of alternating temperature compartment 220, in order to the air in alternating temperature compartment 220
It enters in thawing apparatus 100.The side plate of the both lateral sides of cylinder 110 can be stayed with the side wall of the both lateral sides of alternating temperature compartment 220
There is gap, in order to which the gas in thawing apparatus 100 is expelled in alternating temperature compartment 220.When refrigerator 10 is direct cooling refrigerator, alternating temperature
The rear wall of compartment 220 is the rear wall of its liner；When refrigerator 10 is wind cooling refrigerator, the rear wall of alternating temperature compartment 220 is its interior air duct
The front surface of cover board.In some preferred embodiments, the side plate of the back plate and both lateral sides of cylinder 110 and corresponding alternating temperature compartment
The distance of 220 rear wall and the side wall of both lateral sides can be 2~3mm, such as 2mm, 2.5mm or 3mm, to guarantee thawing apparatus
100 have intake appropriate and air output while, guarantee defrosting chamber 114 have biggish dischargeable capacity.
In some embodiments, refrigerator 10 according to the present invention can be wind cooling refrigerator, and alternating temperature compartment 220 may include air duct
Cover board.The sandwiched formation alternating temperature air duct of liner rear wall of air duct cover board and alternating temperature compartment 220, and offered on air duct cover board alternating temperature into
Air port, for providing cooling capacity for alternating temperature compartment 220.
In some preferred embodiments, the device air inlet 115 of thawing apparatus 100 can be connect with alternating temperature air inlet by one
Pipe connection, in order to freeze for the defrosting chamber 114 of thawing apparatus 100.In other preferred embodiments, thawing apparatus
100 device air inlet 115 can be in alternating temperature air inlet in the projection on the thickness direction of the back plate of cylinder 110, in order to
Freeze for the defrosting chamber 114 of thawing apparatus 100.
In some embodiments, it may be provided in any one compartment door body and to be started or stopped for controlling thaw routine
Thaw switch 224.Radio frequency occurs module 130 and can be configured to start to work when the switch 224 that thaws is opened；When the switch 224 that thaws
When closing, stop working.In course of defrosting, user can terminate thaw routine by closing defrosting switch 224.Any one
Buzzer (not shown) is also provided in compartment door body, for prompting user's object to be processed to thaw completion.Buzzer
It can be configured to (the rate of change decline of the dielectric coefficient of object to be processed when detection module 150 judges that object defrosting to be processed is completed
To less than when being equal to the second rate-valve value), it starts to work；When object to be processed takes out from defrosting chamber 114, stop working.
It may be provided with infrared sensor on the inner wall of defrosting chamber 114, whether place object to be handled in defrosting chamber 114 to sense.
In some preferred embodiments, the refrigeration system of refrigerator 10 can be configured to stop when the switch 224 that thaws is opened to be provided with solution
The accommodation space for freezing device 100 provides cooling capacity；When the switch 224 that thaws is closed, controllably thawing apparatus 100 can be provided with
Accommodation space provides cooling capacity the original refrigerant sequence of refrigerator 10 (run), is thawed object to be processed with reducing in thawing apparatus 100
When, the influence of the refrigeration system of refrigerator 10 to the temperature of defrosting chamber 114.Wherein the refrigeration system of refrigerator 10 may include compression
Machine, condenser, capillary and for providing the evaporator of cooling capacity.
Fig. 7 is the schematic diagram of Tu6Zhong compressor room 240.Referring to Fig. 7, the cabinet 200 of refrigerator 10 is further defined with pressure
Contracting machine room 240.Compressor room 240 may include set gradually for control refrigerator 10 operation master control borad 243, compressor 241,
Condensation water collection structure 244 and for for refrigerator 10 operation power supply circumscripted power line (not shown).In some implementations
In example, refrigerator 10 may also include for the power supply module 242 that module 130 is powered to occur for radio frequency.Power supply module 242 may be disposed at
In the compressor room 240 of refrigerator 10, in order to the heat dissipation and maintenance of power supply module 242.The back plate of cylinder 110 can offer second
Thread passing port 116 is electrically connected so as to which module 130 occurs with radio frequency via the second thread passing port 116 from power supply module 242.Power supply module
242 are securable to the upper wall of compressor room 240, in order to which being electrically connected for module 130 and power supply module 242 occurs for radio frequency.One
In a little embodiments, power supply module 242 can be DC-DC converter.DC-DC converter may be configured as being electrically connected with master control borad 243, with for
Thawing apparatus 100 is powered.DC-DC converter may be disposed between master control borad 243 and compressor 241, so that itself and master control borad 243
Electrical connection it is more convenient.In further embodiments, power supply module 242 can be ACDC converter.ACDC converter is settable
To be electrically connected with the external power supply of refrigerator 10.Those skilled in the art understandably, by all parts of thawing apparatus 100 with
It is easy to accomplish that the control circuit of refrigerator 10, which is connected,.
Fig. 8 is the flow chart of the defreezing method according to an embodiment of the invention for refrigerator 10.Referring to Fig. 8, this hair
The defreezing method of bright refrigerator 10 may include steps of:
Step S802: judging whether defrosting switch 224 is opened, if so, executing step S804；If it is not, executing step S802.
Step S804: power supply module 242 is started to work.
Step S806: whether judgment means door body 120 closes, if so, executing step S808；If it is not, executing step S806.
In this step, using the open and-shut mode of door opening detection device detection device door body 120.Door opening detection device can use fan
The various ways such as shape switch, magnet-sensitive switch, Hall switch are detected, and are closed completely or are opened the time-division in device door body 120
Different electric signals is not generated, with the state of instruction device door body 120.
Step S808: refrigeration system stops to be provided with the accommodation space of thawing apparatus 100 and providing cooling capacity, and mould occurs for radio frequency
Block 130 generates the radiofrequency signal of 40~42MHz, and module 130 and electric pole plate 140a occur for the detection connection radio frequency of detection module 150
Electrical wiring incidence wave signal and reflection wave signal.Operating procedure S810 and step S811.In this step, thawing apparatus
100 are set in alternating temperature compartment 220, and the radiofrequency signal that module 130 generates 40.68MHz occurs for radio frequency.
Step S810: obtain incidence wave signal voltage and current and reflection wave signal voltage and current, calculate to
Rate of change Δ ε/Δ t of the dielectric coefficient of processed material.
Step S812: judge whether rate of change Δ ε/Δ t of the dielectric coefficient of object to be processed is more than or equal to first rate
Threshold value, if so, executing step S814；If it is not, executing step S810.
Step S814: the operating power that module 130 occurs for radio frequency reduces by 30%~40%.In this step, radio frequency occurs
The operating power of module 130 can reduce by 35%.
Step S816: obtain incidence wave signal voltage and current and reflection wave signal voltage and current, calculate to
Rate of change Δ ε/Δ t of the dielectric coefficient of processed material.
Step S818: judge whether rate of change Δ ε/Δ t of the dielectric coefficient of object to be processed is less than or equal to the second rate
Threshold value, if so, executing step S820；If it is not, executing step S816.
Step S820: power supply module 242 stops working, and the switch 224 that thaws is resetted and (closed), runs the original of refrigerator 10
Refrigerant sequence, buzzer are started to work.
Step S822: judging whether object to be processed takes out out of defrosting chamber 114, if so, executing step S824；If not；
Execute step S822.
Step S824: buzzer stops working.
Step S811: obtaining the voltage and current of incidence wave signal and the voltage and current of reflection wave signal, calculating are penetrated
The load impedance Z for the raw module 130 that takes place frequently2。
Step S813: judge that the load impedance Z of module 130 occurs for radio frequency2With output impedance Z1Difference whether less than first
Impedance threshold, if so, executing step S815；If it is not, executing step S817.
Step S815: the motor work of load compensation module 160 increases the impedance of compensating unit.Return step S811.
Step S817: judge that the load impedance Z of module 130 occurs for radio frequency2With output impedance Z1Difference whether be greater than second
Impedance threshold, if so, executing step S819；If it is not, executing step S811.
Step S819: the motor work of load compensation module 160 reduces the impedance of compensating unit.Return step S811.
It will be appreciated by those skilled in the art that ground, when program is run to step S820, power supply module 242 stops working,
Stop power supply, radio frequency occurs module 130, detection module 150 and load compensation module 160 and stops working, i.e., when wait locate
When rate of change Δ ε/Δ t of the dielectric coefficient of reason object drops below or equal to the second rate-valve value, detection module 150 stops inspection
Survey module 130 and the electrical wiring of electric pole plate 140a occur for connection radio frequency incidence wave signal and reflection wave signal, load compensation
Module 160 stops working.
One defrosting workflow of the refrigerator 10 of one embodiment of the invention can include: when user opens the switch that thaws
224 and device door body 120 when closing, power supply module 242 starts to power, and the refrigeration system of refrigerator 10 stops being provided with defrosting dress
The accommodation space for setting 100 provides cooling capacity, and the radiofrequency signal that module 130 generates 40.68MHz occurs for radio frequency, detection module 150 and negative
Compensating module 160 is carried to start to work.Being electrically connected for module 130 and electric pole plate 140a occurs for the detection connection radio frequency of detection module 150
The incidence wave signal and reflection wave signal of line, and calculate the load impedance Z of RF transmitter 1302And the variation of dielectric coefficient
Rate Δ ε/Δ t.When rate of change Δ ε/Δ t of the dielectric coefficient of object to be processed is more than or equal to first rate threshold value, radio frequency
The operating power reduction by 35% of module 130 occurs, meanwhile, in entire defrosting workflow, when the negative of module 130 occurs for radio frequency
Carry impedance Z2With output impedance Z1Difference less than the first impedance threshold or when being greater than the second impedance threshold, load compensation module 160 is logical
The impedance magnitude that motor adjusts compensating unit is crossed, and then adjusts the load impedance Z that module 130 occurs for radio frequency2, make radio frequency that mould occur
The load impedance Z of block 1302With output impedance Z1Difference be always more than equal to the first impedance threshold and be less than or equal to the second default threshold
Value.When rate of change Δ ε/Δ t of the dielectric coefficient of object to be processed is less than or equal to the second rate-valve value, power supply module 242 stops
It only powers, runs the original refrigerant sequence of refrigerator 10, radio frequency occurs module 130, detection module 150, load compensation module 160 and stops
It only works, buzzer is started to work.When user takes out object to be processed out of defrosting chamber 114, buzzer stops working.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (10)
1. a kind of thawing apparatus, comprising:
Cylinder inside defines the defrosting chamber with forward opening, and the defrosting chamber is for placing object to be processed；
Device door body is set at the forward opening of the defrosting chamber, for being opened and closed the defrosting chamber；
Module occurs for radio frequency, is configured to generate radiofrequency signal；With
Electric pole plate and lower electrode plate, horizontally are arranged at respectively at the roof and bottom wall of the defrosting chamber, and respectively with institute
It states radio frequency and module electrical connection occurs, the rf wave of corresponding frequencies is generated in the defrosting chamber according to the radiofrequency signal,
And the indoor object to be processed of the defrosting chamber that thaws；Wherein
The top plate for extending to the cylinder with transverse direction in the vertical direction from the top plate of the cylinder is provided in the cylinder
Vertical baffle；And the radio frequency occurs module and is set between the vertical baffle and the back plate of the cylinder, the defrosting
Chamber is set to the front side of the vertical baffle.
2. thawing apparatus according to claim 1, wherein
The back plate of the cylinder offers and offers defrosting air inlet on device air inlet and the vertical baffle, so that the solution
The air frozen outside device enters to the defrosting chamber via described device air inlet and the defrosting air inlet；And
The side plate of the both lateral sides of the defrosting chamber offers device air outlet so that the indoor gas of defrosting chamber via
Device air outlet is expelled to outside the thawing apparatus.
3. thawing apparatus according to claim 2, wherein
Described device air inlet and the defrosting air inlet are respectively arranged at the both lateral sides that module occurs for the radio frequency, in order to
The heat dissipation of module occurs for the radio frequency.
4. thawing apparatus according to claim 1, further includes:
Pallet is set in the defrosting chamber, to carry the object to be processed；And
The tray arrangement be can the depth direction controllably along the defrosting chamber move, in order to putting for the object to be processed
It sets and takes out.
5. thawing apparatus according to claim 4, wherein
The lower surface of the pallet is 8~12mm at a distance from the lower electrode plate, to prevent the pallet in mobile process
In, friction is generated with the lower electrode plate.
6. thawing apparatus according to claim 1, further includes:
Detection module is configured to detection and connects the incidence wave signal that the electrical wiring of module and the electric pole plate occurs for the radio frequency
And reflection wave signal, and according to the voltage and current of the incidence wave signal and the voltage and current of the reflection wave signal,
Calculate the rate of change of the dielectric coefficient of the object to be processed.
7. thawing apparatus according to claim 6, wherein the cylinder further include:
Horizontal baffle is set as extending forward in the horizontal direction from the vertical baffle, and the detection module is set to the water
Between flat partition board and the top plate of the cylinder；And
The electric pole plate is set to the lower surface of the horizontal baffle, and the lower electrode plate is set to the bottom plate of the cylinder
Upper surface.
8. thawing apparatus according to claim 6 is configured that wherein module occurs for the radio frequency
When the rate of change of the dielectric coefficient of the object to be processed is more than or equal to first rate threshold value, operating power is reduced
30%~40%, to prevent the object to be processed from excessively being thawed；And/or
When the rate of change of the dielectric coefficient of the object to be processed drops below or equal to the second rate-valve value, stop working.
9. a kind of refrigerator, including defining the cabinet of at least one accommodation space and according to claim 1 described in any one of -8
Thawing apparatus, be set in the accommodation space.
10. refrigerator according to claim 9, the cabinet is further defined with the compressor room for placing compressor, wherein
The refrigerator further include:
Power supply module is set to the compressor room, for module for power supply to occur for the radio frequency.
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| CN201710420171.3A CN109000420B (en) | 2017-06-06 | 2017-06-06 | Thawing device and refrigerator with thawing device |
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| CN201710420171.3A CN109000420B (en) | 2017-06-06 | 2017-06-06 | Thawing device and refrigerator with thawing device |
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| CN113915858A (en) * | 2020-12-02 | 2022-01-11 | 海信（山东）冰箱有限公司 | Radio frequency thawing refrigerator |
| US11573044B2 (en) * | 2018-04-18 | 2023-02-07 | Panasonic Intellectual Property Management Co., Ltd. | Refrigerator |
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| CN112556294A (en) * | 2019-09-25 | 2021-03-26 | 博西华电器（江苏）有限公司 | Heating device and refrigerator comprising same |
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