CN109000418A - Thawing apparatus and refrigerator with the thawing apparatus - Google Patents
Thawing apparatus and refrigerator with the thawing apparatus Download PDFInfo
- Publication number
- CN109000418A CN109000418A CN201710418990.4A CN201710418990A CN109000418A CN 109000418 A CN109000418 A CN 109000418A CN 201710418990 A CN201710418990 A CN 201710418990A CN 109000418 A CN109000418 A CN 109000418A
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- thawing apparatus
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- radio frequency
- defrosting
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- 238000010257 thawing Methods 0.000 title claims abstract description 215
- 230000008859 change Effects 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 29
- 230000004308 accommodation Effects 0.000 claims description 15
- 238000009429 electrical wiring Methods 0.000 claims description 9
- 238000003032 molecular docking Methods 0.000 claims description 2
- 235000013305 food Nutrition 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 9
- 238000001816 cooling Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000005057 refrigeration Methods 0.000 description 8
- 238000007710 freezing Methods 0.000 description 7
- 230000008014 freezing Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/46—Dielectric heating
- H05B6/62—Apparatus for specific applications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
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- 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)
- Electric Ovens (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, to generate the rf wave of corresponding frequencies, and the indoor object to be processed of the chamber that thaws in defrosting chamber according to radiofrequency signal；Be set as that the input terminal that is electrically connected of module occurs with radio frequency, to receive external electric energy.Thawing apparatus of the invention, which is provided with, to be connected with external power source, and the input terminal of electric energy is received for thawing apparatus, so that thawing apparatus modularization, convenient for management, uses, improve user experience.
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 easy to use.
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；
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；With
Input terminal is set as being electrically connected with radio frequency generation module, to receive external electric energy.
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 load impedance that module occurs for the radio frequency.
Optionally, the thawing apparatus further include:
Load compensation module, the radio frequency can controllably be increased or reduced by, which being configured to, occurs the load impedance of module, and makes
The load impedance of module occurs for the radio frequency and the difference of output impedance is more than or equal to the first impedance threshold and is less than or equal to the second resistance
Anti- threshold value, to improve the defrosting efficiency of the object to be processed.
Optionally, the cylinder further include:
Vertical baffle is set as extending to the bottom plate of the cylinder in the vertical direction from the top plate of the cylinder, described to penetrate
The raw module that takes place frequently is set between the vertical baffle and the back plate of the cylinder；With
Horizontal baffle is set as extending forward in the horizontal direction from the vertical baffle, the detection module and described negative
Compensating module is carried to be set between the horizontal baffle and the top plate of the cylinder.
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, the detection module is configured to further according to the load impedance calculating of radio frequency generation module
The rate of change of the dielectric coefficient of object to be processed, to judge the defrosting progress of the object to be processed；And
The radio frequency occurs module and 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.
Optionally, the thawing apparatus further include:
Thaw switch, is set in described device door body, for controlling the start and stop of thaw routine；And mould occurs for the radio frequency
Block is configured that
When the defrosting, which switchs, opens, start to work；
When the defrosting, which switchs, closes, stop working.
Optionally, the cylinder and described device door body are respectively arranged with electromagnetic shielding feature；And
The electromagnetic shielding feature for being set to the cylinder and the electromagnetic shielding feature for being set to described device door body are set as
Conductive contact, with when described device door body is closed, the rf wave for preventing the thawing apparatus from generating leaks to the defrosting dress
It sets outer.
Optionally, the radiofrequency signal is a preset fixed frequency within the scope of 40~42MHz.
According to the second aspect of the invention, provide a kind of refrigerator, including define at least one accommodation space cabinet,
For being opened and closed the compartment door body of at least one accommodation space and the thawing apparatus of any description above, the solution respectively
Freeze device to be set in the accommodation space；Wherein
The accommodation space for being provided with the thawing apparatus is provided with output terminal, the input terminal be set as with it is described defeated
Terminal docks out, for thawing apparatus power supply.
Thawing apparatus of the invention, which is provided with, to be connected with external power source, and the input terminal of electric energy is received for thawing apparatus
Son, so that thawing apparatus modularization, convenient for management, uses, improve user experience.
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 thawing apparatus 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, upward-acting door or sliding door.Module 130, which occurs, for radio frequency can be configured to generate radiofrequency signal (generally
Refer to frequency in the radiofrequency signal of 300KHz~300GHz).Electric pole plate 140a and lower electrode plate 140b can be horizontally arranged respectively
At the roof and bottom wall of defrosting chamber 114, and module 130 occurs with radio frequency respectively and is electrically connected, module occurs according to radio frequency
130 radiofrequency signals generated generate the rf wave of relevant parameter in defrosting chamber 114, and thaw and be placed in defrosting chamber 114
Interior object to be processed.In the present invention, electric pole plate 140a is transmitting antenna；Lower electrode plate 140b is receiving antenna.Some
In embodiment, 50 ohm of electrical wiring, which can be used, makes electric pole plate 140a and lower electrode plate 140b that module occur with radio frequency respectively
130 electrical connections.
Particularly, thawing apparatus 100 may also include input terminal 131, such as USB terminal, SCSI terminal etc..Input terminal
131 may be configured as being electrically connected with radio frequency generation module 130, to receive external electric energy, module 130 occur for radio frequency and powers.This hair
Bright thawing apparatus 100 is provided with and can be connected with external power source, and the input terminal 131 of electric energy is received for thawing apparatus 100, is made
Thawing apparatus modularization is obtained, convenient for management, uses, improves user experience.
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%.
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, it may be provided with the defrosting started or stopped for controlling thaw routine in device door body 120
Switch 121.Radio frequency occurs module 130 and can be configured to start to work when the switch 121 that thaws is opened；When thawing, switch 121 is closed
When, it stops working.In course of defrosting, user can terminate thaw routine by closing defrosting switch 121.Device door body 120
On be also provided with buzzer (not shown), for prompting user's object to be processed to thaw completion.Buzzer can be configured to
When detection module 150 judges that object defrosting to be processed is completed, (rate of change of the dielectric coefficient of object to be processed is deteriorated to less than
When the second preset threshold), it starts to work；When object to be processed takes out from defrosting chamber 114, stop working.Defrosting chamber
It may be provided with infrared sensor on 114 inner wall, whether place object to be handled in defrosting chamber 114 to sense.
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, cylinder 110 can also wrap
Include the vertical baffle 111 and horizontal baffle 112 of the inner space for limiting cylinder 110.Vertical baffle 111 may be configured as from cylinder
The top plate of body 110 extends to the bottom plate of cylinder 110 in the vertical direction.Module 130, which occurs, for radio frequency may be disposed at 111 He of vertical baffle
Between the back plate of cylinder 110.Horizontal baffle 112 may be configured as extending forward in the horizontal direction from vertical baffle 111.Detection module
150 and load compensation module 160 may be disposed between horizontal baffle 112 and the top plate of cylinder 110.
Defrosting chamber 114 can be by vertical baffle 111, the bottom plate of horizontal baffle 112 and cylinder 110 and two lateral side plates
It surrounds.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 of cylinder 110
The upper surface of plate.Cylinder 110 may also include from the anterior end of horizontal baffle 112 extends upwardly to cylinder 110 in the vertical direction
Top plate baffle 113, to prevent detection module 150 and load compensation module 160 exposed, reduce thawing apparatus 100 beauty
The property seen.It in further embodiments, can also (module 130 and detection module 150 occur for radio frequency and load is mended according to the actual situation
Repay the size of module 160), horizontal baffle 112 is set as extending forward in the horizontal direction from the back plate of cylinder 110, is erected
It is set as extending to the bottom plate of cylinder 110 in the vertical direction from horizontal baffle 112 to partition 111.
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.The back plate of cylinder 110 can offer the second thread passing port 116, so that input terminal 131 passes through
Module 130 occurs with radio frequency by the second thread passing port 116 to be electrically connected.
Thawing apparatus 100 may also include power supply module 242, such as electric pressure converter, mention for module 130 to occur for radio frequency
For suitable voltage.In some embodiments, power supply module 242 may be configured as being series at input terminal 131 and mould occurs for radio frequency
Between block 130.In this embodiment, power supply module 242 may be disposed between cylinder 110 and vertical baffle 111.In other realities
It applies in example, power supply module 242 may be configured as being series between external power supply and input terminal 131.
In some embodiments, the back plate of cylinder 110 can offer device air inlet 115, the rear side of defrosting chamber 114
Vertical baffle 111 can offer defrosting air inlet 1111, so that the air outside thawing apparatus 100 is via 115 He of device air inlet
Defrosting air inlet 1111 enters to 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 the gas in defrosting 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 in Fig. 1, and wherein the device door body 120 of the thawing apparatus 100 is gone
It removes, to show the internal structure of thawing apparatus 100.Referring to Fig. 3, cylinder 110 and device door body 120 can be respectively arranged with electromagnetic screen
Cover feature 117.It is set to the electromagnetic shielding feature 117 of cylinder 110 and is set to the electromagnetic shielding feature 117 of device door body 120
Electrically conductive connection, to reduce the outside magnetic dispersion amount of thawing apparatus 100 when device door body 120 is closed.It is electromagnetically shielded feature
117 can for the inner surface (towards the surface of cylinder 110) of the inner wall coated on cylinder 110 and device door body 120 conductive coating,
It 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 surround each of cylinder 110
Conductive metal mesh etc. in the neutralization device gate body 120 of 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.It is provided with the receiving of thawing apparatus 100
Space may be provided with output terminal 245.Input terminal 131 may be configured as docking with output terminal 245, for thawing apparatus 100
Power supply.In the illustrated embodiment, the quantity of thawing apparatus 100 is one.The quantity of the accommodation space of refrigerator 10 can be three, point
Not Wei refrigerator room 210, alternating temperature compartment 220 and 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 is set to alternating temperature
In compartment 220.Thawing apparatus 100 can be by consolidating with modes such as the inner wall of the vertical two sides of alternating temperature compartment 220 interference fit or clampings
It is scheduled in alternating temperature compartment 220.
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 preferred embodiments, the refrigeration system of refrigerator 10 can be configured to when thaw switch 121 opening when, stop be
The accommodation space for being provided with thawing apparatus 100 provides cooling capacity；When the switch 121 that thaws is closed, the original refrigeration of refrigerator 10 is run
Program, to reduce when thawing apparatus 100 thaws object to be processed, the refrigeration system of refrigerator 10 is to the temperature of defrosting chamber 114
It influences.Wherein the refrigeration system of refrigerator 10 may include compressor, 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 power supply module
242 are series between external power supply and the input terminal 131 of thawing apparatus 100 in embodiment, and power supply module 242 may be disposed at ice
In the compressor room 240 of case 10, in order to the heat dissipation and maintenance of power supply module 242.Power supply module 242 is securable to compressor room
240 upper wall, in order to be electrically connected with the output terminal 245 being set in accommodation space.In some 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, for the power supply of thawing apparatus 100.
DC-DC converter may be disposed between master control borad 243 and compressor 241, so that it is more convenient with being electrically connected for master control borad 243.
In further embodiments, power supply module 242 can be ACDC converter.ACDC converter may be configured as the external electricity with refrigerator 10
Source electrical connection.Understandably, thawing apparatus 100 can pass through the control of input and output terminal and refrigerator 10 to those skilled in the art
Circuit is connected.
Fig. 8 is the detail flowchart of the defreezing method according to an embodiment of the invention for refrigerator 10.Referring to Fig. 8,
The defreezing method of refrigerator 10 of the invention may include steps of:
Step S802: judging whether defrosting switch 121 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 120, 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 121 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
121 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.The electrical wiring of module 130 and electric pole plate occurs for the detection connection radio frequency of detection module 150
Incidence wave signal and reflection wave signal, and calculate the load impedance Z of RF transmitter 1302And the rate of change of dielectric coefficient
Δε/Δt.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 occurs
The operating power reduction by 35% of module 130, meanwhile, in entire defrosting workflow, when the load resistance of module 130 occurs for radio frequency
Anti- Z2With output impedance Z1Difference less than the first impedance threshold or be greater than the second impedance threshold when, load compensation module 160 passes through electricity
Machine adjusts the impedance magnitude of compensating unit, and then adjusts the load impedance Z that module 130 occurs for radio frequency2, make radio frequency that module occur
130 load impedance Z2With output impedance Z1Difference be always more than equal to the first impedance threshold and be less than or equal to the second preset threshold.
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 supplying
Electricity, runs the original refrigerant sequence of refrigerator 10, and radio frequency occurs module 130, detection module 150, load compensation module 160 and stops work
Make, 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；
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；With
Input terminal is set as being electrically connected with radio frequency generation module, to receive external electric energy.
2. 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 load impedance that module occurs for the radio frequency.
3. thawing apparatus according to claim 2, further includes:
Load compensation module, the radio frequency can controllably be increased or reduced by, which being configured to, occurs the load impedance of module, and makes described
The load impedance of module occurs for radio frequency and the difference of output impedance is more than or equal to the first impedance threshold and is less than or equal to the second impedance threshold
Value, to improve the defrosting efficiency of the object to be processed.
4. thawing apparatus according to claim 3, wherein the cylinder further include:
Vertical baffle is set as extending to the bottom plate of the cylinder in the vertical direction from the top plate of the cylinder, the radio frequency hair
Raw module is set between the vertical baffle and the back plate of the cylinder；With
Horizontal baffle is set as extending forward in the horizontal direction from the vertical baffle, and the detection module and the load are mended
Module is repaid to be set between the horizontal baffle and the top plate of the cylinder.
5. thawing apparatus according to claim 4, 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.
6. thawing apparatus according to claim 2, wherein
The detection module is configured to further calculate the object to be processed according to the load impedance that module occurs for the radio frequency
The rate of change of dielectric coefficient, to judge the defrosting progress of the object to be processed；And
The radio frequency occurs module and 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 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.
7. thawing apparatus according to claim 1, further includes:
Thaw switch, is set in described device door body, for controlling the start and stop of thaw routine；And the radio frequency occurs module and matches
It is set to:
When the defrosting, which switchs, opens, start to work；
When the defrosting, which switchs, closes, stop working.
8. thawing apparatus according to claim 1, wherein
The cylinder and described device door body are respectively arranged with electromagnetic shielding feature；And
The electromagnetic shielding feature for being set to the cylinder and the electromagnetic shielding feature for being set to described device door body are set as conductive
Contact, with when described device door body is closed, the rf wave for preventing the thawing apparatus from generating is leaked to outside the thawing apparatus.
9. thawing apparatus according to claim 1, wherein
The radiofrequency signal is a preset fixed frequency within the scope of 40~42MHz.
10. a kind of refrigerator, including defining the cabinet of at least one accommodation space, at least one described receiving of opening and closing respectively
The compartment door body in space and thawing apparatus according to claim 1 to 9, the thawing apparatus are set to one
In a accommodation space；Wherein
The accommodation space for being provided with the thawing apparatus is provided with output terminal, and the input terminal is set as and the output end
Son docking, for thawing apparatus power supply.
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| CN201710418990.4A CN109000418B (en) | 2017-06-06 | 2017-06-06 | Thawing device and refrigerator with same |
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| CN109000418B CN109000418B (en) | 2020-06-23 |
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| EP3624558A1 (en) * | 2018-09-14 | 2020-03-18 | NXP USA, Inc. | Defrosting apparatus with low-loss load detection and methods of operation thereof |
| CN111227024A (en) * | 2020-03-04 | 2020-06-05 | 珠海格力电器股份有限公司 | Thawing device and refrigerator |
| WO2020118994A1 (en) * | 2018-12-14 | 2020-06-18 | 青岛海尔智能技术研发有限公司 | Radio frequency thawing device |
| US20220079191A1 (en) * | 2019-01-04 | 2022-03-17 | Haier Smart Home Co., Ltd. | Refrigerating and freezing device |
| WO2022105501A1 (en) * | 2020-11-20 | 2022-05-27 | 青岛海尔特种电冰箱有限公司 | Control method for heating device, and heating device |
| US11484048B2 (en) | 2018-09-14 | 2022-11-01 | Nxp Usa, Inc. | Defrosting apparatus with defrosting operation monitoring and methods of operation thereof |
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Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: Qingdao Haier Joint Stock Co.,Ltd. |