CN109000406A

CN109000406A - Refrigerator

Info

Publication number: CN109000406A
Application number: CN201710420159.2A
Authority: CN
Inventors: 张奎; 朱小兵; 戴建斌; 徐同; 李鹏
Original assignee: Qingdao Haier Co Ltd
Current assignee: Qingdao Haier Co Ltd
Priority date: 2017-06-06
Filing date: 2017-06-06
Publication date: 2018-12-14

Abstract

The present invention provides a kind of refrigerators.The refrigerator includes the cabinet for defining at least one accommodation space and the thawing apparatus for being set to an accommodation space.Thawing apparatus includes: the cylinder for being used to place object to be processed for defining the defrosting chamber 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 the radiofrequency signal that frequency range is 40~42MHz；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.Present inventor creatively has found, using the application frequency range rf wave compared to the rf wave of other frequencies, there is shorter thawing time, higher temperature uniformity and lower juice loss rate, especially suitable for refrigerator.

Description

Refrigerator

Technical field

The present invention relates to defrosting fields, more particularly to a kind of refrigerator with quick-thawing function.

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 refrigerator of article matter.

Summary of the invention

It is a kind of with high defrosting efficiency, uniform and certifiable food quality of thawing it is an object of the present invention to provide Refrigerator.

A further object of the present invention is to the defrosting efficiency of refrigerator to be improved.

Another further object of the present invention is to avoid object to be processed from excessively being thawed.

Particularly, the present invention provides a kind of refrigerators, including defining the cabinet of at least one accommodation space and being set to The thawing apparatus of one accommodation space, the thawing apparatus include:

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 the radiofrequency signal that frequency range is 40~42MHz；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.

Optionally, the radiofrequency signal is a preset fixed frequency within the scope of 40.48~40.68MHz.

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 one first impedance threshold and the less than or equal to 1 Two impedance thresholds, to improve the defrosting efficiency of the object to be processed.

Optionally, the load compensation module includes being set as with the concatenated compensating unit of the object to be processed and for increasing The motor of impedance that is big or reducing the compensating unit；Wherein the motor is configured that

When the difference of the load impedance of radio frequency generation module and output impedance is less than first impedance threshold, increase The impedance of the compensating unit；

When the difference of the load impedance of radio frequency generation module and output impedance is greater than second impedance threshold, reduce The impedance of the compensating unit.

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 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；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, thawing apparatus further include:

Elastic conduction ring is set to the peripheral region of the forward opening, so that it sends out when described device door body is closed It is raw to be squeezed and deformed, it is fitted closely with described device door body.

Optionally, the cylinder and described device door body are respectively arranged with electromagnetic shielding feature；And

The electromagnetic shielding feature be set as with the elastic conduction ring conductive contact, with described device door body close When, the rf wave for preventing the thawing apparatus from generating leaks to outside the thawing apparatus.

Optionally, the cabinet is further defined with compressor room, 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.

Present inventor creatively has found, using the application frequency range rf wave compared to other frequencies Rf wave, have shorter thawing time, higher temperature uniformity and lower juice loss rate, especially suitable for ice Case.

Further, the incidence wave signal of the electrical wiring of module and electric pole plate occurs by detection connection radio frequency for the present invention And reflection wave signal, it is computed the load impedance for showing that module occurs for radio frequency, is occupied little space and at low cost, especially suitable for ice Thawing apparatus in case.And make radio frequency that the load impedance of module and the difference of output impedance occur in one by load compensation module In preset range, the defrosting efficiency of object to be processed is further increased.

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.

Further, whether the present invention judges to thaw and complete by the rate of change of the dielectric coefficient of object to be processed, compares Whether completed in judging to thaw by sensing the temperature of object to be processed in the prior art, it is more accurate to judge, can further prevent Only object to be processed is excessively thawed, and test shows the object to be processed to be thawed by thawing apparatus of the invention, is thawed when completing Temperature is generally -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 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. 2 is the schematic cross sectional views of refrigerator shown in Fig. 1；

Fig. 3 is the schematic partial enlarged view of region A in Fig. 2；

Fig. 4 is the schematic cross sectional views of the cutting line B-B interception in Fig. 3；

Fig. 5 is the schematic diagram for the load impedance that module occurs for adjusting radio frequency according to an embodiment of the invention；

Fig. 6 is the rate of change curve graph of the dielectric coefficient of object to be processed according to an embodiment of the invention；

Fig. 7 is the schematic diagram of Tu2Zhong compressor room；

Fig. 8 is the schematic diagram of thawing apparatus in Fig. 3, and wherein the device door body of the thawing apparatus is removed, to show The internal structure of cylinder out；

Fig. 9 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 refrigerator 10 according to an embodiment of the invention, and wherein the refrigerator 10 is all outer Door body is all removed, in the cabinet 100 to show refrigerator 10 between cell structure；Fig. 2 is the schematic sectional of refrigerator 10 shown in Fig. 1 Figure；Fig. 3 is the schematic partial enlarged view of region A in Fig. 2.Referring to Fig. 1 to Fig. 3, refrigerator 10 generally may include defining The cabinet 100 of at least one accommodation space, the compartment door body for picking and placing mouth for being opened and closed each accommodation space respectively, and setting In the thawing apparatus 200 of an accommodation space.In the illustrated embodiment, the quantity of thawing apparatus 200 is one.

Specifically, thawing apparatus 200 may include cylinder 210, device door body 220, radio frequency generation module 230 and power on Pole plate 240a and lower electrode plate 240b.Cylinder 210 may include top plate and bottom plate, back plate and two opposite lateral side plates, in The defrosting chamber 214 with forward opening can be defined, defrosting chamber 214 is for placing object to be processed.Device door body 220 can be set It is placed at the forward opening of defrosting chamber 214, is used to open or closes defrosting chamber 214.Device door body 220 can pass through appropriate side Method is installed together with cylinder 210, such as L.H.flapped door, R.H.flapped door, upward-acting door or sliding door.It is configurable that module 230 occurs for radio frequency To generate radiofrequency signal (referring generally to frequency in the radiofrequency signal of 300KHz~300GHz).Electric pole plate 240a and lower electrode plate 240b can horizontally be arranged at respectively at the roof and bottom wall of defrosting chamber 214, and module 230 occurs with radio frequency respectively and is electrically connected It connects, the rf wave that the radiofrequency signal that module 230 generates generates relevant parameter in defrosting chamber 214 occurs according to radio frequency, and Thaw the object to be processed being placed in defrosting chamber 214.In the present invention, electric pole plate 240a is transmitting antenna；Lower electrode plate 240b is receiving antenna.In some embodiments, 50 ohm of electrical wiring, which can be used, makes electric pole plate 240a and lower electrode plate 240b occurs module 230 with radio frequency respectively and is electrically connected.

In some embodiments, thawing apparatus 200 may also include detection module 250.Detection module 250 can be configured to detect Module 230 and the electrical wiring of electric pole plate 240a occur for radio frequency incidence wave signal and reflection wave signal are connected, and according to incidence The voltage and current of wave signal and the voltage and current of reflection wave signal calculate the load impedance that module 230 occurs for radio frequency. The calculation formula of load impedance is as follows:

SWR=Z₂/Z₁ (1)

Z₁=U₁/I₁=R₁+jX₁ (2)

Z₂=U₂/l₂=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 230 occurs for connection radio frequency to those skilled in the art With the impedance of the electrical wiring of electric pole plate 240a, load impedance is the impedance of object to be processed).

Fig. 5 is the schematic diagram for the load impedance that module occurs for adjusting radio frequency according to an embodiment of the invention.Referring to figure 5, thawing apparatus 200 may also include load compensation module 260.Load compensation module 260 may include a compensating unit 261 and be used for Adjust the motor 262 of the impedance of compensating unit 261.Compensating unit 261 may be configured as connecting with object to be processed, i.e., radio frequency is sent out at this time The load impedance of raw module 230 be the impedance of object to be processed and the impedance of compensating unit 261 and.Motor 262 can be configured to by The impedance of compensating unit 261 is increased or reduced to control, and then increases or reduces the load impedance Z that module 230 occurs for radio frequency₂, and Make radio frequency that the load impedance Z of module 230 occur₂With output impedance Z₁Difference (i.e. load impedance Z₂Subtract output impedance Z₁It obtains Numerical value) it is more than or equal to one first impedance threshold and is less than or equal to one second impedance threshold, and the first impedance threshold is less than the second resistance Anti- threshold value, to improve the defrosting efficiency of object to be processed.In some preferred embodiments, the first impedance threshold is output impedance Z₁ - 6~-4%, the second impedance threshold be output impedance Z₁4~6%.It is further preferred that the first impedance threshold is output resistance Anti- Z₁- 5%, the second impedance threshold be output impedance Z₁5%.In other words, load compensation module can be configured to send out radio frequency The load impedance Z of raw module 230₂With output impedance Z₁Absolute value of the difference, be always less than output impedance in entire course of defrosting Z₁5%, may be, for example, output impedance Z₁1%, 3% or 5%.

Detection module 250 can be configured to the load impedance Z that module 230 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 240a and lower electrode plate 240b 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. 6 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. 6, in some preferred embodiments In, module 230, 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 230, 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 refrigerator.The electricity of module 230 and electric pole plate 240a occurs by detection connection radio frequency for the present invention The incidence wave signal and reflection wave signal of line, are computed the dielectric coefficient for obtaining object to be processed, occupy little space and at low cost, Especially suitable for the thawing apparatus in refrigerator.And by load compensation module 260 make radio frequency occur module 230 load impedance with The difference of output impedance was in a preset range (be more than or equal to one first impedance threshold and be less than or equal to one second impedance threshold), 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 250, 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 230 occurs for radio frequency is reduced by 30~40%, object to be processed can be effectively prevented and decomposed excessively Freeze.

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 124.Radio frequency occurs module 230 and can be configured to start to work when the switch 124 that thaws is opened；When the switch 124 that thaws When closing, stop working.In course of defrosting, user can terminate thaw routine by closing defrosting switch 124.Some excellent It selects in embodiment, the refrigeration system of refrigerator 10 can be configured to stop when the switch 124 that thaws is opened to be provided with thawing apparatus 200 accommodation space provides cooling capacity；When the switch 124 that thaws is closed, the former refrigerant sequence of refrigerator 10 is run, is being thawed with reducing Device 200 thaw object to be processed when, the influence of the refrigeration system of refrigerator 10 to the temperature of defrosting chamber 214.Wherein refrigerator 10 Refrigeration system may include compressor, condenser, capillary and for providing the evaporator of cooling capacity.

It is also provided with buzzer (not shown) in any one compartment door body, for having prompted user's object to be processed It thaws and completes.Buzzer can be configured to the (dielectric coefficient of object to be processed when detection module 250 judges that object defrosting to be processed is completed Rate of change when dropping below or equal to the second rate-valve value), start to work；When object to be processed takes from defrosting chamber 214 When out, stop working.It may be provided with infrared sensor on the inner wall of defrosting chamber 214, whether put to sense in defrosting chamber 214 It is equipped with object to be processed.

Fig. 7 is the schematic diagram of Tu2Zhong compressor room 140.Referring to Fig. 7, the cabinet 100 of refrigerator 10 is further defined with pressure Contracting machine room 140.Compressor room 140 may include set gradually for control refrigerator 10 operation master control borad 143, compressor 141, Condensation water collection structure 144 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 142 that module 230 is powered to occur for radio frequency.Power supply module 142 may be disposed at In the compressor room 140 of refrigerator 10, in order to the heat dissipation and maintenance of power supply module 142.Power supply module 142 is securable to compressor The upper wall of room 140, in order to which being electrically connected for module 230 and power supply module 142 occurs for radio frequency.In some embodiments, power supply mould Block 142 can be DC-DC converter.DC-DC converter may be configured as being electrically connected with master control borad 143, for the power supply of thawing apparatus 200. DC-DC converter may be disposed between master control borad 143 and compressor 141, so that it is more convenient with being electrically connected for master control borad 143. In further embodiments, power supply module 142 can be ACDC converter.ACDC converter may be configured as the external electricity with refrigerator 10 Source electrical connection.Those skilled in the art understandably, by the control circuit phase of all parts of thawing apparatus 200 and refrigerator 10 It is even easy to accomplish.

Fig. 4 is the schematic cross sectional views of the cutting line B-B interception in Fig. 3.Referring to Fig. 3 and Fig. 4, cylinder 210 can also be wrapped Include the vertical baffle 211 and horizontal baffle 212 of the inner space for limiting cylinder 210.Vertical baffle 211 may be configured as from cylinder The top plate of body 210 extends to the bottom plate of cylinder 210 in the vertical direction.Module 230, which occurs, for radio frequency may be disposed at 211 He of vertical baffle Between the back plate of cylinder 210.Horizontal baffle 212 may be configured as extending forward in the horizontal direction from vertical baffle 211.Detection module 250 and load compensation module 260 may be disposed between horizontal baffle 212 and the top plate of cylinder 210.Defrosting chamber 214 can be by erecting It is surrounded to partition 211, the bottom plate of horizontal baffle 212 and cylinder 210 and two lateral side plates.Electric pole plate 240a may be disposed at The lower surface of horizontal baffle 212, lower electrode plate 240b may be disposed at the upper surface of the bottom plate of cylinder 210.Cylinder 210 may also include The baffle 213 of the top plate of cylinder 210 is extended upwardly to, in the vertical direction from the anterior end of horizontal baffle 212 to prevent from detecting Module 250 and load compensation module 260 are exposed, reduce the aesthetics of thawing apparatus 200.

It in further embodiments, can also (module 230 and detection module 250 and negative occur for radio frequency according to the actual situation Carry the size of compensating module 260), horizontal baffle 212 is set as prolonging forward in the horizontal direction from the back plate of cylinder 210 It stretches, vertical baffle 211 is set as extending to the bottom plate of cylinder 210 in the vertical direction from horizontal baffle 212.

Vertical baffle 211 can offer the first thread passing port 2112, so that module 230 occurs for radio frequency via the first thread passing port 2112 are electrically connected with electric pole plate 240a.The back plate of cylinder 210 can offer the second thread passing port 216, so that from power supply module 142 Module 230 occurs with radio frequency via the second thread passing port 216 to be electrically connected.

In some embodiments, the back plate of cylinder 210 can offer device air inlet 215, the rear side of defrosting chamber 214 Vertical baffle 211 can offer defrosting air inlet 2111 so that the air being provided in the accommodation space of thawing apparatus 200 via Device air inlet 215 and defrosting air inlet 2111 enter to the defrosting chamber 214 of thawing apparatus 200.The both lateral sides of cylinder 210 Side plate can offer device air outlet 218 so that the gas in defrosting chamber 214 is expelled to appearance via device air outlet 218 Receive space.The back plate of cylinder 210 can there are gaps with the rear wall of the accommodation space for being provided with thawing apparatus 200, in order to the appearance The air in space of receiving enters in thawing apparatus 200.The side plate of the both lateral sides of cylinder 210 can be provided with thawing apparatus There are gaps for the side wall of the both lateral sides of 200 accommodation space, in order to which the gas in thawing apparatus 200 is expelled to receiving sky In.When refrigerator 10 is direct cooling refrigerator, the rear wall of accommodation space is the rear wall of its liner；When refrigerator 10 is wind cooling refrigerator, The rear wall of accommodation space is the front surface of its interior air duct cover board.

In some preferred embodiments, the side plate of the back plate and both lateral sides of cylinder 210 with after corresponding accommodation space The distance of wall and the side wall of both lateral sides can be 2~3mm, such as 2mm, 2.5mm or 3mm, to have in guarantee thawing apparatus 200 While intake and air output appropriate, guarantee that defrosting chamber 214 has biggish dischargeable capacity.

In some preferred embodiments, the device air inlet 215 of thawing apparatus 200 and defrosting air inlet 2111 can be set respectively The both lateral sides that module 230 occurs for radio frequency are placed in, in order to which the heat dissipation of module 230 occurs for radio frequency.In some alternate embodiments In, the device air inlet 215 and defrosting air inlet 2111 of thawing apparatus 200 may be disposed at the same side that module 230 occurs for radio frequency.

The present invention is not being received by being provided with device air inlet 215 and device air outlet 218 on thawing apparatus 200 To when defrosting instruction, defrosting chamber 214 can be used to place food materials, and the storage space in refrigerator 10 is made to be fully utilized.

Thawing apparatus 200 may also include pallet 270.Pallet 270 is set in defrosting chamber 214, and object to be processed is placed In on pallet 270.Pallet 270 can be configured to controllably to move on the depth direction of defrosting chamber 214, in order to be processed The placement and taking-up of object.In some preferred embodiments, the lower surface of pallet 270 at a distance from lower electrode plate 240b can for 8~ 12mm, such as 8mm, 10mm, 12mm generate friction with lower electrode plate 240b to prevent during 270 pull of pallet.

Referring to Fig. 1 to Fig. 3, in some embodiments, the quantity of the accommodation space of refrigerator 10 can be three.Specifically, ice Case 10 may include the cabinet 100 for defining refrigerator room 110, alternating temperature compartment 120 and freezing compartment 130, and be respectively used to out Close refrigeration door body 111, alternating temperature door body 121 and the freezing door body 131 of refrigerator room 110, alternating temperature compartment 120 and freezing compartment 130. Thawing apparatus 200 may be disposed in alternating temperature compartment 120.Thawing apparatus 200 can pass through the inner wall with the vertical two sides of alternating temperature compartment 120 The modes such as interference fit or clamping are fixed in alternating temperature compartment 120.The switch 124 that thaws may be disposed in alternating temperature door body.

In addition, also illustratable be, knownly, refrigerator room 110 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 130, which refers to, Room；Alternating temperature compartment 120 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.

In some embodiments, refrigerator 10 according to the present invention can be wind cooling refrigerator, and alternating temperature compartment 120 may include air duct Cover board 122.The sandwiched formation alternating temperature air duct of liner rear wall of air duct cover board 122 and alternating temperature compartment 120, and opened on air duct cover board 122 Equipped with alternating temperature air inlet 1221, for providing cooling capacity for alternating temperature compartment 120.In some preferred embodiments, thawing apparatus 200 Device air inlet 215 can be connect with alternating temperature air inlet 1221 by a connecting tube 123, in order to the defrosting for thawing apparatus 200 Chamber 214 freezes.In other preferred embodiments, the device air inlet 215 of thawing apparatus 200 is after cylinder 210 Projection on the thickness direction of plate can be in alternating temperature air inlet 1221, in order to for the defrosting chamber 214 of thawing apparatus 200 into Row refrigeration.

It may be provided with alternating temperature inlet air door 1222 at alternating temperature air inlet 1221, for being connected or blocking alternating temperature air duct.Alternating temperature Inlet air door 1222 can be configured to: when radio frequency generation module 230 is in running order, alternating temperature inlet air door 1222 is closed, i.e., Alternating temperature air duct stops being that alternating temperature compartment 120 provides cooling capacity, impacts to avoid to the object to be processed that thaws of thawing apparatus 200；It penetrates When the raw module 230 that takes place frequently is in off working state, alternating temperature inlet air door 1222 is opened, i.e., alternating temperature air duct can be alternating temperature compartment 120 Cooling capacity is provided, defrosting chamber 214 is for placing food materials.

Fig. 8 is the schematic diagram of thawing apparatus 200 in Fig. 3, and wherein the device door body of the thawing apparatus is removed, with The internal structure of cylinder is shown.Referring to Fig. 8, thawing apparatus 200 may also include elastic conduction ring 280.Elastic conduction ring 280 It may be disposed at the peripheral region of the forward opening of defrosting chamber 214, so that it is squeezed and deformed when device door body 220 is closed, It is fitted closely with device door body 220, i.e., forms sealing between elastic conduction ring 280 and device door body 220.In some preferred realities It applies in example, elastic conduction ring 280 can be by silicone, silicone fluoride, EPDM, fluorocarbon-fluorine compound and silver-plated Aluminium is made.Elastic conduction ring 280 can be hollow annular construction, make it when device door body 220 is closed, with device door body 220 It fits closely.The width of elastic conduction ring 280 may be configured as 20~30mm, such as 20mm, 25mm or 30mm, be thawed with improving The leakproofness of device 200.Cylinder 210 and device door body 220 can be respectively arranged with electromagnetic shielding feature 217.It is set to cylinder 210 Electromagnetic shielding feature 217 and be set to the electromagnetic shielding feature 217 of device door body 220 and can be respectively set to and elastic conduction ring 280 conductive contacts are enclosed, the outside magnetic dispersion amount of thawing apparatus 200 is reduced, reduced to human body when device door body 220 is closed Caused by endanger.Being electromagnetically shielded feature 217 can be the inner wall coated on cylinder 210 and the inner surface of device door body 220 (towards cylinder The surface of body 210) conductive coating, the inner wall for being posted by cylinder 210 and device door body 220 inner surface conductive metal mesh or The conductive metal mesh etc. being formed in the neutralization device gate body 220 for surrounding each plate body of cylinder 210.In some preferred embodiments In, device air inlet 215, defrosting air inlet 2111 and the device air outlet 218 of thawing apparatus 200 can be provided with conductive metal Net 290, the electromagnetic shielding feature 217 that conductive metal mesh 290 may be configured as and be set to cylinder 210 are conductively connected, to reduce solution Freeze the magnetic dispersion amount of device 200.

Particularly, in the present invention, the frequency for the radiofrequency signal that module 230 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 200 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 200 are all the same.

Thawing apparatus 200 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 270 in thawing apparatus 200, 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 200 judgement thaw complete (i.e. radio frequency generation module stop Only work) time；Temperature uniformity: after the completion of defrosting, the temperature of four corners of beef and central point is measured respectively, and is calculated The difference of the average value of central point temperature and four corners, temperature uniformity are the ratio of the difference and the average value；Juice stream Mistake 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 weight before thawing with beef.

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 200 are all the same, under same test condition, using range of embodiment of the invention The defrosting effect of the thawing apparatus 200 of interior rf frequency is better than the thawing apparatus 200 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 200 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 200 It reduces to 18min hereinafter, temperature uniformity is improved to 0.4 hereinafter, juice loss rate is reduced to 0.32% or less.

Fig. 9 is the flow chart of the defreezing method according to an embodiment of the invention for refrigerator 10.Referring to Fig. 9, this hair The defreezing method of bright refrigerator 10 may include steps of:

Step S902: judging whether defrosting switch 124 is opened, if so, executing step S904；If it is not, executing step S902.

Step S904: power supply module 142 is started to work.

Step S906: whether judgment means door body 220 closes, if so, executing step S908；If it is not, executing step S906. In this step, using the open and-shut mode of door opening detection device detection device door body 220.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 220 Different electric signals is not generated, with the state of instruction device door body 220.

Step S908: refrigeration system stops to be provided with the accommodation space of thawing apparatus 200 and providing cooling capacity, and mould occurs for radio frequency Block 230 generates the radiofrequency signal of 40~42MHz, and module 230 and electric pole plate 240a occur for the detection connection radio frequency of detection module 250 Electrical wiring incidence wave signal and reflection wave signal.Operating procedure S910 and step S911.In this step, thawing apparatus 200 are set in alternating temperature compartment 120, and the radiofrequency signal that module 230 generates 40.68MHz occurs for radio frequency.

Step S910: 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 S912: 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 S914；If it is not, executing step S910.

Step S914: the operating power that module 230 occurs for radio frequency reduces by 30%~40%.In this step, radio frequency occurs The operating power of module 230 can reduce by 35%.

Step S916: 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 S918: 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 S920；If it is not, executing step S916.

Step S920: power supply module 142 stops working, and the switch 124 that thaws is resetted and (closed), runs the original of refrigerator 10 Refrigerant sequence, buzzer are started to work.

Step S922: judging whether object to be processed takes out out of defrosting chamber 214, if so, executing step S924；If not； Execute step S922.

Step S924: buzzer stops working.

Step S911: 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 230 that takes place frequently₂。

Step S913: judge that the load impedance Z of module 230 occurs for radio frequency₂With output impedance Z₁Difference whether less than first Impedance threshold, if so, executing step S915；If it is not, executing step S917.

Step S915: the motor 262 of load compensation module 260 works, and increases the impedance of compensating unit 261.Return step S911。

Step S917: judge that the load impedance Z of module 230 occurs for radio frequency₂With output impedance Z₁Difference whether be greater than second Impedance threshold, if so, executing step S919；If it is not, executing step S911.

Step S919: the motor 262 of load compensation module 260 works, and reduces the impedance of compensating unit 261.Return step S911。

It will be appreciated by those skilled in the art that ground, when program is run to step S920, power supply module 142 stops working, Stop power supply, radio frequency occurs module 230, detection module 250 and load compensation module 260 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 250 stops inspection Survey module 230 and the electrical wiring of electric pole plate 240a occur for connection radio frequency incidence wave signal and reflection wave signal, load compensation Module 260 stops working.

One defrosting workflow of the refrigerator 10 of one embodiment of the invention can include: when user opens the switch that thaws 124 and device door body 220 when closing, power supply module 142 starts to power, and the refrigeration system of refrigerator 10 stops being provided with defrosting dress The accommodation space for setting 200 provides cooling capacity, and the radiofrequency signal that module 230 generates 40.68MHz occurs for radio frequency, detection module 250 and negative Compensating module 260 is carried to start to work.Being electrically connected for module 230 and electric pole plate 240a occurs for the detection connection radio frequency of detection module 250 The incidence wave signal and reflection wave signal of line, and calculate the load impedance Z of RF transmitter 230₂And 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 230 occurs, meanwhile, in entire defrosting workflow, when the negative of module 230 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 260 is logical The impedance magnitude that motor 262 adjusts compensating unit 261 is crossed, and then adjusts the load impedance Z that module 230 occurs for radio frequency₂, make radio frequency The load impedance Z of module 230 occurs₂With output impedance Z₁Difference be always more than equal to the first impedance threshold and be less than or equal to 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 142 stop power supply, run the original refrigerant sequence of refrigerator 10, and module 230, detection module 250, load compensation module occur for radio frequency 260 stop working, and buzzer is started to work.When user takes out object to be processed out of defrosting chamber 214, buzzer stops work Make.

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

1. a kind of refrigerator, including defining the cabinet of at least one accommodation space and being set to the defrosting of an accommodation space Device, the thawing apparatus include:

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.

2. refrigerator according to claim 1, wherein

The radiofrequency signal is a preset fixed frequency within the scope of 40.48~40.68MHz.

3. refrigerator according to claim 1, wherein the thawing apparatus further include:

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.

4. refrigerator according to claim 3, wherein 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 described The load impedance of module occurs for radio frequency and the difference of output impedance is more than or equal to one first impedance threshold and is less than or equal to one second resistance Anti- threshold value, to improve the defrosting efficiency of the object to be processed.

5. refrigerator according to claim 4, wherein

The load compensation module includes being set as with the concatenated compensating unit of the object to be processed and for increasing or reducing State the motor of the impedance of compensating unit；Wherein the motor is configured that

When the difference of the load impedance of radio frequency generation module and output impedance is less than first impedance threshold, described in increase The impedance of compensating unit；

When the difference of the load impedance of radio frequency generation module and output impedance is greater than second impedance threshold, described in reduction The impedance of compensating unit.

6. refrigerator according to claim 4, 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.

7. refrigerator according to claim 3, 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；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.

8. refrigerator according to claim 1, wherein thawing apparatus further include:

Elastic conduction ring is set to the peripheral region of the forward opening, so that it occurs to squeeze when described device door body is closed Compressive strain is fitted closely with described device door body.

9. refrigerator according to claim 8, wherein

The cylinder and described device door body are respectively arranged with electromagnetic shielding feature；And

10. refrigerator according to claim 1, the cabinet is further defined with compressor room, wherein the refrigerator further include: