CN109990563B

CN109990563B - Air-cooled refrigerator and control method thereof

Info

Publication number: CN109990563B
Application number: CN201711484938.5A
Authority: CN
Inventors: 王海娟; 李鹏; 朱小兵
Original assignee: Qingdao Haier Co Ltd
Current assignee: Haier Smart Home Co Ltd
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2021-01-01
Anticipated expiration: 2037-12-29
Also published as: CN109990563A

Abstract

The invention provides an air-cooled refrigerator. The air-cooled refrigerator comprises a box body limited with at least one storage chamber, chamber air supply air ducts respectively arranged in the at least one storage chamber, and a unfreezing device arranged in one storage chamber. The thawing apparatus includes a barrel defining a thawing chamber, a radio frequency generation module for generating a radio frequency signal, and a radio frequency antenna for generating radio frequency waves within the thawing chamber in response to the radio frequency signal. The middle chamber air supply duct is provided with a chamber air inlet used for conveying cooling air for the storage chamber and a device air inlet used for conveying cooling air for the unfreezing device. The barrel has a chamber air inlet that receives cooling air blown from the device air inlet. And each device air inlet is provided with a device air inlet door which can be controlled to open and close the air flow path between the corresponding device air inlet and the chamber air inlet. The invention can lead the articles placed in the thawing chamber to obtain the cold quantity quickly and improve the utilization rate of the storage space in the air-cooled refrigerator.

Description

Air-cooled refrigerator and control method thereof

Technical Field

The invention relates to the field of food unfreezing, in particular to an air-cooled refrigerator with an unfreezing function and a control method thereof.

Background

The quality of the food is maintained in the process of freezing the food, and when a user has eating or processing requirements, the frozen food is thawed by the thawing device. Among the prior art, for the freezing and unfreezing of convenience food, set up thawing apparatus in air-cooled refrigerator, however, when the user does not use thawing apparatus to unfreeze food, the cold volume outside the thawing apparatus can not be fast even can not be transmitted to in the chamber that unfreezes, has caused the waste in storage space in the air-cooled refrigerator. In view of the above, there is a need for an air-cooled refrigerator having a thawing function and capable of rapidly refrigerating in a thawing chamber.

Disclosure of Invention

It is an object of the first aspect of the present invention to provide an air-cooled refrigerator having a defrosting function and capable of rapidly refrigerating in a defrosting chamber.

A further object of the first aspect of the invention is to prevent the substance to be treated from being excessively thawed.

An object of the second aspect of the present invention is to provide a method for controlling an air-cooled refrigerator.

In particular, according to a first aspect of the present invention, there is provided an air-cooled refrigerator comprising a cabinet defining at least one storage compartment, compartment air supply ducts respectively provided in the at least one storage compartment, and a thawing device provided in one of the storage compartments, the thawing device comprising a barrel defining a thawing chamber, a radio frequency generation module for generating a radio frequency signal, and a radio frequency antenna for generating radio frequency waves in the thawing chamber according to the radio frequency signal, wherein

The compartment air supply duct is provided with a compartment air inlet for conveying cooling air to the storage compartment and at least one device air inlet for conveying cooling air to the unfreezing device;

the cylinder is provided with at least one chamber air inlet which is configured to receive cooling air blown out from the at least one device air inlet respectively; and is

And each device air inlet is provided with a device air inlet door which is configured to be capable of controllably switching on and off a gas flow path between the corresponding device air inlet and the chamber air inlet.

Optionally, the device intake damper is configured to:

when the radio frequency generation module is in a non-working state, the radio frequency generation module can be controlled to be switched to an open state;

and when the radio frequency generation module is in a working state, switching to a closing state.

Optionally, the air-cooled refrigerator further comprises:

the refrigeration switch is used for receiving a refrigeration instruction of the thawing chamber; and the device intake damper is further configured to:

when the refrigeration switch is turned on, the refrigeration switch can be controlled to be switched to an on state;

and when the refrigeration switch is turned off, switching to an off state.

Optionally, the device air intake door is further configured to switch its open and closed state according to the temperature in the defrosting chamber;

when the temperature in the unfreezing chamber is larger than or equal to a preset temperature threshold value, the air inlet door of the device is switched to an open state;

and when the temperature in the unfreezing chamber is smaller than the preset temperature threshold value, the air inlet door of the device is switched to a closed state.

Optionally, the thawing apparatus further comprises:

the detection module is configured to detect an incident wave signal and a reflected wave signal of the radio frequency antenna and calculate the change rate of the dielectric coefficient of the object to be processed according to the voltage and the current of the incident wave signal and the voltage and the current of the reflected wave signal; and the radio frequency generation module is configured to:

when the change rate of the dielectric coefficient of the object to be treated is greater than or equal to a first rate threshold value, the working power of the object to be treated is reduced by 30-40% so as to prevent the object to be treated from being excessively thawed; and/or

And stopping the operation when the change rate of the dielectric coefficient of the object to be processed is reduced to be less than or equal to a second rate threshold value.

According to a second aspect of the present invention, there is provided a control method for an air-cooled refrigerator, the air-cooled refrigerator including at least one storage compartment, compartment air supply ducts respectively disposed in the at least one storage compartment, and a thawing device, the thawing device including a barrel defining a thawing chamber, a radio frequency generation module for generating a radio frequency signal, and a radio frequency antenna for generating a radio frequency wave in the thawing chamber according to the radio frequency signal, the barrel having at least one chamber air inlet, the compartment air supply duct having a compartment air inlet and at least one device air inlet for supplying cooling air to the chamber air inlet, each device air inlet being provided with a device air inlet damper for opening and closing a gas flow path between the device air inlet and the chamber air inlet, the control method including:

judging whether the radio frequency generation module is in a non-working state;

if yes, the air inlet door of the device is switched to an open state;

if not, the air inlet door of the device is switched to a closed state.

Optionally, the air-cooled refrigerator further includes a refrigeration switch for receiving a defrosting chamber refrigeration command, wherein before the device air intake damper is switched to the open state, the air-cooled refrigerator further includes:

judging whether the refrigeration switch is turned on or not;

if yes, the air inlet door of the device is switched to an open state;

if not, the air inlet door of the device is switched to a closed state.

Optionally, before the device intake air door is switched to the open state, the device further comprises:

judging whether the temperature in the unfreezing chamber is greater than or equal to a preset temperature threshold value or not;

if yes, the air inlet door of the device is switched to an open state;

if not, the air inlet door of the device is switched to a closed state.

Optionally, the thawing device further comprises a detection module for detecting an incident wave signal and a reflected wave signal of the rf antenna, wherein the control method further comprises:

acquiring the radio frequency wave signal and the reflected wave signal;

calculating the change rate of the dielectric coefficient of the object to be processed according to the voltage and the current of the incident wave signal and the voltage and the current of the reflected wave signal;

judging whether the change rate of the dielectric coefficient of the object to be processed is greater than or equal to a first rate threshold value or not;

if so, the working power of the radio frequency generation module is reduced by 30-40%.

acquiring the radio frequency wave signal and the reflected wave signal;

judging whether the change rate of the dielectric coefficient of the object to be processed is reduced to be less than or equal to a second rate threshold value or not;

if yes, the radio frequency generation module stops working.

According to the invention, the air inlet of the device for conveying cooling air for the unfreezing chamber is formed in the air duct cover plate, and the air inlet of the chamber for receiving the cooling air blown out from the air inlet of the device is formed in the barrel of the unfreezing device, so that articles placed in the unfreezing chamber can quickly obtain cooling capacity, the utilization rate of the storage space in the air-cooled refrigerator is improved, and the user experience is improved.

Furthermore, the thawing progress of the object to be treated is judged by detecting the incident wave signal and the reflected wave signal of the radio frequency antenna and calculating the change rate of the dielectric coefficient of the object to be treated, so that the thawing device is small in occupied space and low in cost, and is particularly suitable for thawing devices in air-cooled refrigerators. Prior to the present invention, it was generally believed by those skilled in the art that when the temperature of the treatment was high (i.e., the temperature of the treatment was-7℃. or higher), the thermal effects would be significantly attenuated and the treatment would not be excessively thawed. However, this is not the case, and the rf thawing power is usually large, for example, greater than 100W, and when the temperature of the object to be treated is already high, the object to be treated is easily over-thawed. The inventor of the application creatively realizes that when the temperature of the object to be treated is higher, the working power of the radio frequency generation module is reduced by 30-40%, and the object to be treated can be effectively prevented from being excessively thawed.

Furthermore, the invention judges whether the unfreezing is finished or not according to the change rate of the dielectric coefficient of the object to be treated, compared with the prior art that whether the unfreezing is finished or not is judged by sensing the temperature of the object to be treated, the judgment is more accurate, the object to be treated can be further prevented from being excessively unfrozen, and tests show that the object to be treated unfrozen by the unfreezing device has the temperature of-4 to-2 ℃ generally when the unfreezing is finished, and the generation of blood water during unfreezing when the object to be treated is meat can be avoided.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic cross-sectional view of a thawing apparatus according to one embodiment of the present invention;

FIG. 2 is a graph of the rate of change of the dielectric constant of an object to be treated according to one embodiment of the present invention;

FIG. 3 is a schematic block diagram of the drawer of FIG. 1;

FIG. 4 is a schematic exploded view of the drawer of FIG. 3;

fig. 5 is a schematic sectional view of a refrigerator according to one embodiment of the present invention;

FIG. 6 is a schematic partial cross-sectional view of the refrigerator of FIG. 5;

FIG. 7 is a schematic block diagram of the thawing apparatus of FIG. 6 according to one embodiment of the present invention;

FIG. 8 is a schematic block diagram of the thawing apparatus of FIG. 6 according to another embodiment of the present invention;

fig. 9 is a schematic sectional view of a refrigerator according to another embodiment of the present invention;

fig. 10 is a schematic sectional view of a refrigerator according to still another embodiment of the present invention;

fig. 11 is a schematic cross-sectional view of a refrigerator according to still another embodiment of the present invention;

FIG. 12 is a schematic block diagram of the thawing apparatus of FIG. 11;

FIG. 13 is a flow chart of a control method for defrosting chamber refrigeration according to one embodiment of the present invention;

fig. 14 is a flowchart of a thawing control method according to an embodiment of the present invention.

Detailed Description

Fig. 1 is a schematic cross-sectional view of a thawing apparatus 100 according to an embodiment of the present invention. Referring to fig. 1, the thawing apparatus 100 may include a barrel 110, an apparatus door, an rf generation module 160, and an rf antenna 130. The drum 110 may include a top side plate, a bottom side plate, a rear plate, and two opposite lateral side plates, and a thawing chamber 111 having a front opening may be defined therein, the thawing chamber 111 being used to place the object to be treated. The device door body may be disposed at a forward opening of the thawing chamber 111, and is used to open or close the thawing chamber 111. The door of the apparatus may be mounted with the drum 110 by an appropriate method, such as a left-hand door, a right-hand door, an up-hand door, or a pull door. The RF generation module 160 may be configured to generate RF signals (generally referred to as RF signals having a frequency of 300KHz to 300 GHz). The rf antenna 130 may be composed of two plate-type dipoles juxtaposed in a transverse direction or a front-rear direction of the thawing apparatus 100, and fixed at an inner wall of the thawing chamber 111. The two dipoles can be electrically connected with the radio frequency generation module 160 through a coaxial feeder line, so as to generate radio frequency waves with corresponding parameters in the unfreezing chamber 111 according to radio frequency signals generated by the radio frequency generation module 160, and unfreeze the object to be processed placed in the unfreezing chamber 111. In the present invention, the radio frequency signal generated by the radio frequency generating module 160 is preferably a fixed frequency preset in a range of 40.48 to 40.68 MHz. The rf generating module 160 may be a solid-state power source capable of generating rf signals, which may be precisely controlled by a chip to achieve frequency and/or power adjustment. The rf antenna 130 may be horizontally disposed at the bottom wall of the thawing chamber 111, so as to avoid increasing the thickness of the top side plate of the barrel 110 due to the rf antenna 130 disposed at the top wall of the thawing chamber 111, thereby improving the aesthetic property of the thawing apparatus 100.

In some embodiments, the thawing apparatus 100 may further comprise a detection module 140. The detection module 140 may be configured to detect an incident wave signal and a reflected wave signal of the rf antenna 130, and calculate a load impedance of the rf generation module 160 according to a voltage and a current of the incident wave signal and a voltage and a current of the reflected wave signal. In the present invention, the detecting module 140 may obtain the incident wave signal and the reflected wave signal of the rf antenna 130 from a coaxial feeder connecting the rf generating module 160 and the transmitting antenna, or directly obtain the incident wave signal and the reflected wave signal from the transmitting antenna. The calculation formula of the load impedance is as follows:

SWR＝Z₂/Z₁ (1)

Z₁＝U₁/I₁＝R₁+jX₁ (2)

Z₂＝U₂/l₂＝R₂+jX₂ (3)

in equations (1), (2), (3): SWR is standing wave ratio; z₁Is the output impedance; z₂Is the load impedance; u shape₁Is the incident wave voltage; i is₁Is incident wave current; r₁Is an output resistor; x₁Is an output reactance; u shape₂Is the reflected wave voltage; i is₂Is a reflected wave current; r₂Is a load resistor; x₂Is the load reactance (as will be understood by those skilled in the art, the output impedance is the impedance of the coaxial feed connecting the rf generation module 160 and the transmitting antenna, and the load impedance is the impedance of the object to be processed).

The thawing apparatus 100 may further include a load compensation module 180. The load compensation module 180 may include a compensation unit and a motor for adjusting an impedance of the compensation unit. The compensation unit may be disposed in series with the object to be processed, i.e., when the load impedance of the rf generation module 160 is the sum of the impedance of the object to be processed and the impedance of the compensation unit. The motor may be configured to controllably change the direction of rotation to increase or decrease the impedance of the compensation unit, and thus the load impedance Z of the rf generation module 160₂And makes the load impedance Z of the RF generation module 160₂And an output impedance Z₁Difference (i.e. load impedance Z)₂Subtracting the output impedance Z₁The obtained value) is more than or equal to a first impedance threshold value and less than or equal to a second impedance threshold value, and the first impedance threshold value is less than the second impedance threshold value, so as to improve the thawing efficiency of the object to be treated. In some preferred embodiments, the first impedance threshold is the output impedance Z₁Is-6 to-4%, and the second impedance threshold is the output impedance Z₁4-6% of the total. Further preferably, the first impedance threshold is the output impedance Z₁Of the second impedance threshold is the output impedance Z ₁5% of the total. In other words, the load compensation module 180 may be configured to cause the load impedance Z of the RF generation module 160₂And the transmissionOutput impedance Z₁The absolute value of the difference is always smaller than the output impedance Z in the whole thawing process ₁5% of (e) may be, for example, the output impedance Z₁1%, 3% or 5%.

The detection module 140 may be configured to further determine the load impedance Z of the RF generation module 160₂And calculating the change rate of the dielectric coefficient of the object to be treated so as to judge the thawing progress of the object to be treated. The dielectric coefficient of the object to be processed is calculated by the following formula:

X₂＝1/2πfC (4)

＝4πKdC/S (5)

in equations (4), (5): f is the frequency of the radio frequency wave; c is the capacitance of the capacitor formed by the rf antenna 130 and the top wall of the thawing chamber 111; the dielectric coefficient of the object to be treated; k is an electrostatic constant; d is the thickness of the rf antenna 130; s is the area of one dipole.

The rate of change of the dielectric constant of the object to be treated can be obtained by calculating the value of change Δ of the dielectric constant per unit time Δ t, wherein the unit time Δ t can be 0.1 seconds to 1 second, such as 0.1 seconds, 0.5 seconds, or 1 second. FIG. 2 is a graph showing a rate of change of permittivity of an object to be treated according to an embodiment of the present invention (ordinate is a rate of change of permittivity of the object Δ/Δ t; abscissa is a thawing time t of the object in min). Referring to fig. 2, in some preferred embodiments, the rf generation module 160 may be configured to reduce the operating power by 30% -40%, for example, 30%, 35% or 40%, when the change rate Δ/Δ t of the dielectric constant of the object is greater than or equal to the first rate threshold, so as to prevent the object from being excessively thawed (as will be understood by those skilled in the art, the temperature of the object is greater than 0 ℃). The first rate threshold may be 15-20, such as 15, 17, 18, or 20. The RF generation module 160 can be further configured to stop operating when the change rate Δ/Δ t of the dielectric constant of the object to be processed decreases to be less than or equal to the second rate threshold. The second rate threshold may be 1-2, such as 1, 1.5, or 2.

It is known to those skilled in the art that the dielectric constant of the object to be treated may vary with the temperature of the object to be treated, however, the dielectric constant is usually measured by a special instrument (such as a dielectric constant tester), and the special instrument occupies a large space and is high in cost, and is not suitable for the thawing apparatus 100 with a small size. The dielectric coefficient of the object to be processed is obtained through calculation by detecting the incident wave signal and the reflected wave signal of the radio frequency antenna 130, so that the thawing device 100 is small in occupied space and low in cost, and is particularly suitable for the thawing device 100. According to the invention, the difference between the load impedance and the output impedance of the radio frequency generation module 160 is within a preset range (greater than or equal to a first impedance threshold value and less than or equal to a second impedance threshold value) through the load compensation module 180, so that the thawing efficiency of the object to be treated is improved.

Further, the invention judges the thawing progress of the object to be treated by calculating the change rate of the dielectric coefficient of the object to be treated through the detection module 140. Prior to the present invention, it was generally believed by those skilled in the art that when the temperature of the treatment was high (i.e., the temperature of the treatment was-7℃. or higher), the thermal effects would be significantly attenuated and the treatment would not be excessively thawed. However, this is not the case, and the rf thawing power is usually large, for example, greater than 100W, and when the temperature of the object to be treated is already high, the object to be treated is easily over-thawed. The inventor of the present application has creatively recognized that, when the temperature of the object to be treated is high, the operating power of the rf generating module 160 is reduced by 30-40%, which can effectively prevent the object to be treated from being excessively thawed. Furthermore, the invention judges whether the unfreezing is finished or not through the change rate of the dielectric coefficient of the object to be treated, compared with the prior art that whether the unfreezing is finished or not is judged through sensing the temperature of the object to be treated, the judgment is more accurate, the object to be treated can be further prevented from being excessively unfrozen, and tests show that the object to be treated unfrozen by the unfreezing device 100 of the invention has the unfreezing temperature of-4 to-2 ℃ generally, and the generation of blood water during unfreezing when the object to be treated is meat can be avoided.

In some embodiments, the thawing apparatus 100 may further include a thawing switch for controlling the start and stop of the thawing process. The RF generation module 160 is configured to begin operation when the defrost switch is turned on; when the unfreezing switch is closed, the work is stopped. During the thawing process, the user can terminate the thawing process by turning off the thawing switch at any time. The defrost switch may be configured to automatically switch to an off state when the defrost is complete. The thawing apparatus 100 may be further provided with a buzzer for prompting a user that the thawing of the object to be treated is completed.

In some embodiments of the invention, the barrel 110 may be made of a conductive metal. The detection module 140 may be disposed within the thawing chamber 111. The thawing apparatus 100 further comprises a baffle 150. The baffle 150 may be configured to be in conductive connection with the inner wall of the thawing chamber 111 and to enclose a shielded chamber with the inner wall of the thawing chamber 111 that may prevent the entry of radio frequency waves. The detection module 140 and the load compensation module 180 can be disposed in the shielding chamber, so that interference of the radio frequency wave generated by the radio frequency antenna 130 on the detection module 140 and the load compensation module 180 can be effectively avoided, accuracy of adjusting load impedance of the radio frequency generation module 160 by the incident wave signal and the reflected wave signal detected by the detection module 140 and the load compensation module 180 is improved, accuracy of judging the thawing progress of the object to be processed is improved, and the thawing rate of the object to be processed is ensured.

FIG. 3 is a schematic block diagram of the drawer 120 of FIG. 1; fig. 4 is a schematic exploded view of the drawer 120 of fig. 3. Referring to fig. 3 and 4, the thawing apparatus 100 may further include a drawer 120. Further, the drawer 120 may include a bottom plate, a front circumferential side plate 1211, a rear circumferential side plate, and a drawer body 121 surrounded by two lateral circumferential side plates for carrying the object to be processed. In particular, the front circumferential side panel 1211 may be provided to be engageable with a circumferential edge of the forward opening of the thawing chamber 111 to open and close the thawing chamber 111 as a device door. The distance between the lower surface of the bottom plate and the upper surface of the rf antenna 130 may be 8-12 mm, such as 8mm, 10mm, or 12mm, so as to prevent the bottom plate from rubbing against the rf antenna 130 during the drawing process of the drawer 120. The front upper portion of the front circumferential side plate 1211 may be formed with a groove 1212 extending in a lateral direction of the thawing apparatus 100 so that a user can draw the drawer 120. According to the invention, the front circumferential side plate 1211 of the drawer body 121 is directly matched with the cylinder body 110 to open and close the unfreezing chamber 111, compared with the prior art that the front end cover and the drawer body 121 are separately arranged, the user experience and the attractiveness of the unfreezing device 100 are improved, and the front end cover and the drawer body are integrally formed, so that the assembly process is reduced, the production cost is reduced, and the production efficiency is improved.

In some preferred embodiments of the present invention, the drawer body 121 may be made of insulating plastic to reduce electromagnetic loss of radio frequency waves at the drawer body 121. The drawer 120 may also include a metal trim 122, a conductive sheet metal 123, and a resilient conductive loop 124. The metal decorations 122 may be provided to be attached to the front surface and the upper and lower end surfaces of the front circumferential side panel 1211 to improve the aesthetic appearance of the thawing apparatus 100. The conductive sheet metal part 123 may be configured to be attached to two lateral end surfaces of the front circumferential side plate 1211 and a portion of a rear surface that is engaged with a circumferential edge of the front opening of the thawing chamber 111 to form an electromagnetic circuit in cooperation with the metal decoration 122 and the metal cylinder 110, so that a magnetic leakage amount of the thawing apparatus 100 at the front opening of the thawing chamber 111 is reduced, and a hazard of radio frequency waves to a user is reduced. The elastic conductive ring 124 may be disposed on the rear surface of the conductive sheet metal part 123, so that it is pressed and deformed when the front circumferential side 1211 closes the thawing chamber 111, and is tightly attached to the cylinder 110, thereby improving the sealing performance of the thawing apparatus 100, and further reducing the amount of magnetic leakage of the thawing apparatus 100 at the front opening of the thawing chamber 111.

The baffle 150 may include a horizontal section 151 extending in a horizontal direction and a vertical section 152 extending vertically upward from a front end of the horizontal section 151, and is disposed to be electrically conductively connected to a top wall, a rear wall, and two lateral inner walls of the thawing chamber 111. The thawing apparatus 100 may further include a protection switch configured to send an electrical signal to the rf generation module 160 to stop the rf generation module 160 when the user opens the front circumferential side 1211 during the thawing process, so as to prevent the rf waves from harming the health of the user and improve the safety of the thawing apparatus 100. The protection switch may be a touch type mechanical switch. In some preferred embodiments, a protection switch may be provided at a front surface of the vertical section 152 of the barrier 150, and the protection switch may be in contact with a rear circumferential side plate of the drawer body 121 to be switched to an open state when the front circumferential side plate 1211 is closed. When the user opens the front circumferential side panel 1211, the protection switch is separated from the rear circumferential side panel of the drawer body 121, the protection switch is switched to the closed state, and an electrical signal for stopping the operation is transmitted to the rf generation module 160, so that the rf generation module 160 stops the operation. In some alternative embodiments, the protection switch may be disposed at the periphery of the forward opening of the thawing chamber 111.

The detection module 140 and the load compensation module 180 may be fixed on the horizontal section 151. In some preferred embodiments of the present invention, the thawing apparatus 100 may further include a conductive connection board 153. The conductive connection board 153 may be disposed between the detection module 140, the load compensation module 180 and the horizontal segment 151 of the baffle 150, and respectively electrically connected to the detection module 140, the load compensation module 180 and the horizontal segment 151 of the baffle 150, and the conductive connection board 153 is grounded, so that charges accumulated on the cylinder 110 and the baffle 150 may be eliminated, the detection module 140 and the load compensation module 180 are further prevented from being interfered by the rf waves, and the safety of the thawing apparatus 100 is improved. In some embodiments of the present invention, the thawing apparatus 100 may further comprise a conductive post 154 that may transmit an electrical signal. Both ends of the transmission post 154 can be respectively set to be in conductive connection with the horizontal segment 151 of the baffle 150 and the rf antenna 130, so as to transmit the incident wave signal and the reflected wave signal of the rf antenna 130 to the horizontal segment 151 of the baffle 150, and the detection module 140 can obtain the incident wave signal and the reflected wave signal of the rf antenna 130 by detecting the electrical signal on the baffle 150, which is not only convenient for assembling the thawing apparatus 100, but also can obtain more accurate incident wave signal and reflected wave signal.

In some preferred embodiments of the present invention, the rf generation module 160 may be disposed outside the cylinder 110 to facilitate heat dissipation of the rf generation module 160. The outer wall of the rear plate of the cylinder 110 may have a cylinder connection port 113 electrically connected to the rf antenna 130, the detection module 140, the load compensation module 180, the protection switch, etc., and the rf generation module 160 may have an rf connection port electrically connected thereto. The barrel wiring port 113 and the radio frequency wiring port may be electrically connected by an electric connection wire 170, the electric connection wire 170 including a wire and two wire terminals electrically connected to both ends of the wire, respectively, and the two wire terminals may be electrically connected to the barrel wiring port 113 and the radio frequency wiring port, respectively, so as to facilitate installation and storage of the thawing apparatus 100.

The invention also provides a refrigerator 200 based on the thawing device 100 of any one of the previous embodiments. Fig. 5 is a schematic sectional view of a refrigerator 200 according to one embodiment of the present invention. Referring to fig. 5, the refrigerator 200 may generally include a cabinet 210 defining a compressor compartment 214 and at least one storage compartment, compartment door bodies for respectively opening and closing access ports of the respective storage compartments, a refrigeration system, and a thawing device 100 provided to one storage compartment. In the illustrated embodiment, the number of thawing devices 100 is one. The refrigerator 200 is an air-cooled refrigerator (as is well known to those skilled in the art, the air-cooled refrigerator is a refrigerator in which an evaporator 234 in a refrigeration system is disposed in a compartment air supply duct sandwiched between an air duct cover 240 and an inner wall of a storage compartment, and air in the storage compartment is forced to perform heat convection with the evaporator 234 by an air supply fan 2131), and the refrigerator body 210 defines three storage compartments, namely, a refrigerating compartment 211, a temperature-changing compartment 212, and a freezing compartment 213, and a refrigerating door body 221, a temperature-changing door body 222, and a freezing door body 223 for opening and closing the refrigerating compartment 211, the temperature-changing compartment 212, and the freezing compartment 213, respectively, and the thawing apparatus 100 is disposed in the freezing compartment 213.

Further, it can also be stated that the refrigeration system comprises a compressor, a condenser communicating with the outlet of the compressor, a capillary tube, an evaporator 234 providing the refrigeration of the storage compartment, and a solenoid-operated valve connected in series between the condenser and the capillary tube, as is well known to those skilled in the art. The refrigeration chamber 211 is a storage chamber with the preservation temperature of 0 to +8 ℃ for food materials; the freezing chamber 213 is a storage chamber with the preservation temperature of food materials of-20 to-15 ℃; the variable temperature chamber 212 is a storage chamber capable of changing the storage temperature in a wide range (for example, the adjustment range can be above 4 ℃ and can be adjusted to above 0 ℃ or below 0 ℃), and the storage temperature can generally span the refrigeration temperature, the soft freezing temperature (generally-4 to 0 ℃) and the freezing temperature, and is preferably-16 to +4 ℃.

In some preferred embodiments of the present invention, the rf generation module 160 may be disposed outside the foam layer of the box 210, so as to facilitate heat dissipation and maintenance of the rf generation module 160 and increase the effective volume of the thawing chamber 111. The wires connecting the barrel connection port 113 and the rf connection port may be preset in the foam layer of the case 210, and the two wire terminals may be fixed to the inner wall of the storage compartment provided with the thawing apparatus 100 and the outer side of the case 210, respectively. The barrel 110 may be provided to be slidable in the front and rear direction of the refrigerator 200 and to electrically connect the barrel wiring port 113 with a wire terminal fixed to the inner wall of the storage compartment, so as to facilitate the installation of the thawing apparatus 100. The thawing apparatus 100 may further comprise a radio frequency power supply for powering the radio frequency generation module 160. The rf power source may be configured to be electrically connected to the power supply circuit of the refrigerator 200 to obtain power from the power supply circuit of the refrigerator 200 to power the rf generation module 160.

In some further preferred embodiments of the present invention, the barrel 110 may have at least one guide block 112 extending rearward from a rear plate thereof, a rear wall of the locker room where the thawing apparatus 100 is provided may be correspondingly formed with a guide groove, and the guide block 112 may be configured to be slid into the guide groove in a front-rear direction of the refrigerator 200 and to make the barrel connection port 113 abut against a wire terminal provided at the rear wall of the locker room, so as to facilitate installation of the barrel 110 and prevent the connection port and the wire terminal from being damaged. Wherein the guide block 112 may have a dimension in the front-rear direction of the refrigerator 200 greater than a dimension in the front-rear direction of the refrigerator 200 of the wire terminal fixed to the rear wall of the storage compartment. In the present invention, the number of the guide blocks 112 may be one, two, or more than two. The number of the guide blocks 112 is preferably two so that the guide of the guide blocks 112 has high accuracy. The bottom surface of the guide block 112 may be disposed to be coplanar with the bottom surface of the cylinder 110 so that the guide block 112 is butted against the guide groove. The rear surface of the guide block 112 may be arranged in arc transition connection with the side surface of the guide block 112 perpendicular to the rear surface, so as to avoid damaging the inner wall of the storage compartment when the guide block 112 is in butt joint with the guide groove.

Referring to fig. 5, in some embodiments of the invention, the rf generation module 160 may be disposed within the compressor compartment 214. Wire terminals electrically connected to rf generation module 160 may be secured at the inner wall of compressor compartment 214 or extend into compressor compartment 214 to facilitate electrical connection of rf generation module 160. The refrigerator 200 may include a drip tray. The drip tray is installed on the bottom frame of the refrigerator 200 and is formed with a cavity opened upward for collecting and evaporating condensed water in the refrigerator 200. The compressor is installed on the diapire of water collector cavity. The drip tray may further be provided in a lateral direction with a radio frequency bracket 2144 mounted on the bottom chassis of the refrigerator 200 in parallel thereto, and the radio frequency generation module 160 is fixed to the radio frequency bracket 2144. Heat dissipation vents are respectively formed in two lateral sidewalls of the compressor chamber 214, so that heat is discharged from the interior of the compressor chamber 214 to the exterior of the compressor chamber 214 along with the air flow.

The refrigerator 200 may further include a heat dissipation plate 2145. The heat dissipation plate 2145 may be configured to be thermally connected to the rf generating module 160, so as to increase the heat dissipation area of the rf generating module 160 and improve the heat dissipation efficiency. Specifically, the heat dissipation plate 2145 may include a base plate extending horizontally and a plurality of fins extending upward from an upper surface of the base plate in parallel and spaced relation. The substrate may be disposed in thermal communication with an upper surface of the rf generation module 160. The heat dissipation plate 2145 is preferably thermally connected to the rf generation module 160 through a heat dissipation adhesive or a heat pipe structure, so as to increase the rate of heat transfer from the rf generation module 160 to the heat dissipation plate 2145, thereby increasing the heat dissipation efficiency of the rf generation module 160. In the present invention, the heat dissipation glue may be a heat conductive silica gel.

In some preferred embodiments, the RF generation module 160 may exchange heat naturally under the flow of air within the compressor compartment 214. The plurality of fins of the heat dissipation plate 2145 may be disposed to extend in a lateral direction of the refrigerator 200 so as to facilitate air flow along gaps between the plurality of fins. In some further preferred embodiments, at least one heat dissipation fan may be disposed within the compressor compartment 214. The heat dissipation fan may be configured to promote airflow along a transverse direction of the refrigerator 200 to increase an air flow speed in the compressor chamber 214, thereby improving heat dissipation efficiency of the rf generation module 160. The heat dissipation fan is preferably disposed between the rf generation module 160 and the compressor to prevent heat generated by the rf generation module 160 and the compressor from accumulating at one side of the compressor compartment 214, thereby creating a safety hazard and reducing the service life of the rf generation module 160 and the compressor. Because the heat generated by the rf generating module 160 during operation is much less than the heat generated by the compressor during operation, the heat dissipation fan can be configured to force the air outside the compressor chamber 214 to enter the compressor chamber 214 from the heat dissipation vent adjacent to the rf generating module 160 and to be discharged outside the compressor chamber 214 from the heat dissipation vent adjacent to the compressor, so as to prevent the rf generating module 160 from being in a high temperature environment for a long time and reduce the service life. Further preferably, the heat dissipation fan may be configured to operate when any one of the compressor and the rf generation module 160 is in an operating state, so as to ventilate and dissipate heat from the compressor chamber 214.

In other preferred embodiments, at least one heat dissipation fan may be disposed above the rf generating module 160, so as to promote the air flow above the rf generating module 160 when the rf generating module 160 is in the working state, so as to improve the heat dissipation efficiency of the rf generating module 160. The air blowing direction of the heat dissipation fan may be set to be parallel to the extending direction of the plurality of fins, so as to reduce the resistance of the air flow above the rf generation module 160. The plurality of fins may be provided to extend in a front-rear direction of the refrigerator 200 so that heat exchange between the air in the compressor chamber 214 and the plurality of fins is more sufficient. The heat dissipation fan may be disposed inside the compressor chamber 214, i.e., the heat dissipation fan is located at the front side of the heat dissipation plate 2145, so as to prevent heat generated by the rf generation module 160 from accumulating inside the compressor chamber 214. The projection of the heat dissipation fan on the vertical plane perpendicular to the fins is preferably completely positioned in a space range formed by the two fins closest to the circumferential edge of the base plate in a clamping mode, namely the projection of the heat dissipation fan on the vertical plane perpendicular to the fins is completely positioned between the two fins at the farthest interval, so that the heat dissipation efficiency is guaranteed, and meanwhile the occupied space of the heat dissipation fan is reduced. In the present invention, the heat radiation fan may be a centrifugal fan. The number of the heat radiation fans can be one, two or more than two. The heat dissipation fan may be configured to be fixedly connected to the base plate of the heat dissipation plate 2145, so as to facilitate mounting and dismounting of the heat dissipation fan.

In other embodiments of the present invention, the outer case of the box 210 may define an inward recessed receiving slot, and the rf generating module 160 may be disposed in the receiving slot, so as to facilitate heat dissipation and maintenance of the rf generating module 160. The wire terminals electrically connected to the rf generating module 160 may be fixed at the inner wall of the receiving groove or extend into the receiving groove, so as to facilitate the electrical connection of the rf generating module 160. The rf power source for supplying power to the rf generating module 160 may also be disposed in the accommodating groove, so as to facilitate maintenance of the rf power source. The box body 210 may further have a receiving cover detachably disposed at a rear opening of the receiving groove to prevent the rf generating module 160 from being exposed and damaged and to improve the aesthetic property of the refrigerator 200. The container can be located at the top wall of the box 210, and since there is usually no shielding above the refrigerator 200, it is more beneficial to dissipate heat of the rf generating module 160. The receiving groove may also be located at the rear wall of the refrigerator 200 to facilitate inspection and maintenance of the rf generation module 160. In some preferred embodiments, the rf generation module 160 may be configured to be thermally connected to the receiving cover plate, so that indirect heat transfer through the air in the receiving groove is not required, thereby improving the heat dissipation efficiency of the rf generation module 160. A heat dissipation adhesive may also be disposed between the rf generation module 160 and the receiving cover plate to increase the rate at which heat is transferred from the rf generation module 160 to the receiving cover plate.

In particular, the refrigeration system of the refrigerator 200 of the present invention can also provide cold energy to the thawing chamber 111 during the non-thawing process, and rapidly refrigerate or freeze the goods in the thawing chamber 111. Specifically, the method comprises the following steps:

in some embodiments, the compartment air supply duct of the storage compartment in which the defrosting device 100 is arranged may have a compartment air inlet for supplying cooling air to the storage compartment and at least one device air inlet for supplying cooling air to the defrosting chamber 111. The drum 110 may have at least one chamber inlet configured to receive cooling air blown from at least one device inlet, respectively. In the invention, the number of the air inlets of the device can be one, two or more than two. The compartment air supply duct may be provided with a device air inlet door 241 which may be controlled to open and close the air flow path between the device air inlet and the chamber air inlet. The barrel 110 may further be provided with a chamber air return opening 114, and the gas in the thawing chamber 111 may be discharged from the chamber air return opening 114 to the outside of the thawing chamber 111. The chamber air inlet and the chamber air return 114 may be a plurality of ventilation holes penetrating the plate of the barrel 110 where the ventilation holes are located, so as to reduce the amount of magnetic leakage from the exterior of the thawing apparatus 100. The vent holes are preferably oblong to ensure the rate of gas entry into the thawing chamber 111 or exit from the thawing chamber 111.

FIG. 6 is a schematic partial cross-sectional view of the refrigerator 200 of FIG. 5; FIG. 7 is a schematic block diagram of the thawing apparatus 100 of FIG. 6 according to one embodiment of the present invention; fig. 8 is a schematic structural view of the thawing apparatus 100 of fig. 6 according to another embodiment of the present invention. Referring to fig. 6 to 8, in some preferred embodiments, at least one device air inlet may be opened on the air duct cover 240 of the storage compartment, and a device air inlet damper 241 is disposed at the device air inlet. At least one chamber air inlet may be formed at a side plate combined with the rear plate of the drum 110. The thawing apparatus 100 may further include at least one apparatus inlet duct 115 communicating the at least one chamber inlet and the apparatus inlet, such that the cooling air in the compartment supply duct is delivered from the apparatus inlet to the thawing chamber 111 via the apparatus inlet duct 115 and the chamber inlet in sequence. The chamber air return opening 114 may be opened at a rear plate of the barrel 110, and a gap is left between the chamber air return opening 114 and a rear wall (i.e., the air duct cover 240) of the corresponding storage compartment, so that the gas in the thawing chamber 111 is discharged into the storage compartment corresponding to the thawing apparatus 100 through the chamber air return opening 114. The chamber air return 114 is preferably located at the upper portion of the back plate, i.e. the chamber air return 114 is located above the horizontal central plane of the back plate, to allow more efficient heat exchange of the cooling gas with the air inside the defrosting chamber 111. The distance between the vertical central plane of the chamber air inlet extending along the transverse direction and the front opening of the cylinder body 110 is 1/5-1/3, such as 1/5, 1/4 or 1/3, of the size of the cylinder body 110 in the depth direction, so that heat exchange between the cooling air and the air in the unfreezing chamber 111 is more sufficient, and the temperature uniformity of the unfreezing chamber 111 is improved. The rear end face of the device air inlet channel 115 may be provided with a sealing strip 117 to tightly attach to the air duct cover 240 when the device air inlet channel 115 is in butt joint with the device air inlet, thereby preventing the reduction of the air volume delivered into the thawing chamber 111. The device air inlet duct 115 may include a duct main body extending horizontally in the front-rear direction of the air-cooled refrigerator 200 (i.e., the depth direction of the storage compartment), and a flange extending from the rear side edge of the duct main body in a direction away from the central axis of the duct main body. The duct main body may be configured such that a lower surface thereof is previously attached to an outer surface of the cylinder 110 to facilitate installation of the thawing apparatus 100. The cylinder 110 may have a mounting groove extending in the front-rear direction of the air-cooled refrigerator 200, and the air duct main body may be mounted on the bottom surface of the mounting groove to facilitate mounting and positioning of the device air inlet passage 115. The sealing strip 117 may be disposed on the rear end surface of the flange to increase the contact area between the sealing strip 117 and the duct cover 240, so as to further improve the sealing performance. In some embodiments, the number of chamber vents may be one. A chamber air inlet may be formed at a top side plate of the cylinder 110. The horizontal central axis of the chamber intake vent in the front-rear direction of the refrigerator 200 is preferably in the vertical central plane of the thawing chamber 111 in the front-rear direction of the refrigerator 200 to improve the temperature uniformity of the thawing chamber 111. Referring to fig. 8, in other embodiments, the number of chamber vents may be two. The two chamber air inlets may be respectively formed at two lateral side plates of the cylinder 110. The horizontal central axis of the two chamber air inlets in the front-rear direction of the refrigerator 200 is preferably located within the range of 1/2-2/3 height of the thawing chamber 111, such as 1/2 height, 3/5 height or 2/3 height, to improve the temperature uniformity of the thawing chamber 111.

Fig. 9 is a schematic sectional view of a refrigerator 200 according to another embodiment of the present invention; fig. 10 is a schematic sectional view of a refrigerator 200 according to still another embodiment of the present invention. Referring to fig. 9 and 10, in further preferred embodiments, the compartment supply air duct may include a compartment supply main duct 217 for supplying cooling air to the storage compartment and a device supply air branch duct 218 for supplying cooling air to the thawing chamber 111. The device air intake branch 218 is provided in communication with the main compartment air supply path 217 and is provided above the cylinder 110. The device air intake may be open to the device air intake branch 218. The device inlet damper 241 may be disposed at the junction of the main compartment air supply path 217 and the device inlet air branch path 218. The chamber air inlet may be formed in the top side plate of the barrel 110, and the cooling air in the device air inlet branch 218 may be blown out from the device air inlet and enter the thawing chamber 111 through the chamber air inlet. The projection of the device air inlet onto the horizontal plane is preferably located within the chamber air inlet to improve the efficiency of cooling the thawing chamber 111. The portion of the device inlet air branch 218 adjacent to the device inlet opening may be configured to extend in a tapered manner along the direction of the gas flow therein to increase the gas flow velocity and reduce the refrigeration loss. The chamber air return opening 114 may be opened at a rear plate of the barrel 110, and a gap is left between the chamber air return opening 114 and a rear wall (i.e., the air duct cover 240) of the storage compartment where the chamber air return opening 114 is located, so that the gas in the thawing chamber 111 is discharged into the storage compartment through the chamber air return opening 114. The chamber air return 114 is preferably located at the upper portion of the back plate, i.e. the chamber air return 114 is located above the horizontal central plane of the back plate, to allow more efficient heat exchange of the cooling gas with the air inside the defrosting chamber 111. The distance between the vertical central plane of the chamber air inlet extending along the transverse direction and the front opening of the cylinder body 110 is 1/5-1/3, such as 1/5, 1/4 or 1/3, of the size of the cylinder body 110 in the depth direction, so that heat exchange between the cooling air and the air in the unfreezing chamber 111 is more sufficient, and the temperature uniformity of the unfreezing chamber 111 is improved. In some embodiments, the device air intake branch 218 may be pre-positioned in a foam layer on the upper side of the storage compartment so that the thawing chamber 111 may have a larger available space. Referring to FIG. 10, in other embodiments, the device inlet air branch 218 may be attached to the upper wall of the storage compartment to facilitate installation of the device inlet air branch 218. A gap of 8-12 mm, such as 8mm, 10mm or 12mm, is left between the upper surface of the cylinder 110 and the upper wall surface of the storage compartment or the lower surface of the device air inlet branch 218, so as to facilitate the installation of the thawing device 100.

Fig. 11 is a schematic cross-sectional view of a refrigerator 200 according to still another embodiment of the present invention; fig. 12 is a schematic configuration diagram of the thawing apparatus 100 in fig. 11. Referring to fig. 11 and 12, in further preferred embodiments, the chamber intake vents are provided in the back plate of the cylinder 110. The chamber air return opening 114 is opened on any one lateral side plate of the barrel 110. The chamber air inlet may be preferably disposed at an edge of either lateral side of the rear plate of the barrel 110, and the chamber air return opening 114 is disposed on a lateral side plate away from the chamber air inlet to improve temperature uniformity of the thawing chamber 111. Both the chamber air intake and the chamber air return 114 may be disposed above the horizontal central plane of the barrel 110 to further improve the temperature uniformity of the thawing chamber 111. Both the compartment intake and the device intake may be provided on the duct cover 240, wherein cooling air blown from the device intake may enter the thawing chamber 111 via the chamber intake. The device intake damper 241 may be disposed at the device intake. The refrigerator 200 may also include a device return air duct 219 in communication with the compartment supply air duct, with the device return air duct 219 having a device return air opening through which air exhausted from the compartment return air opening 114 may be returned into the compartment supply air duct. The device return air passage 219 is preferably pre-positioned within the foam layer of the case 210 to provide a greater effective storage volume for the defrost chamber 111 and to enhance the aesthetics of the refrigerator 200. In some further preferred embodiments, the thawing apparatus 100 may further comprise two air guiding structures 116 defining air guiding channels. Two air deflection structures 116 may be provided extending outwardly from the outer periphery of the chamber inlet and chamber return 114, respectively, and interfacing with the device inlet and device return, respectively, to increase the rate of cooling the thawing chamber 111. Specifically, each wind-guiding structure 116 may include a wind-guiding section and a docking section. The air guide section can be arranged to extend outwards from the outer periphery of the air inlet of the chamber. The butt joint section can be arranged to extend outwards from the rear end of the air guide section towards the direction deviating from the central axis of the air guide section, and the rear end face of the butt joint section is arranged to be in butt joint with the device air inlet or the device air return inlet, so that the contact area between the air guide structure 116 and the periphery of the device air inlet or the periphery of the device air return inlet is increased, and the tightness of the butt joint is improved. The rear end face of the butt-joint section may be further provided with a sealing strip 117, so that the air guiding structure 116 is tightly attached to the periphery of the air inlet of the device or the periphery of the air return inlet of the device. The abutting section of the air guiding structure 116 connected to the chamber air return opening 114 can be arranged to extend from front to back obliquely inwards, so as to facilitate the installation of the barrel 110 and further improve the tightness of the abutting joint. In other alternative embodiments, the cooling air blown out of the device inlet may also enter the thawing chamber 111 via the storage compartment indirectly through the chamber inlet, and the air blown out of the chamber inlet may return to the compartment supply air duct via the storage compartment indirectly through the device inlet and the device return air duct 219.

In some embodiments of the present invention, the refrigeration system may be configured to not provide cooling energy to the thawing chamber 111 when the rf generation module 160 is in the active state, thereby avoiding a reduction in the rate of thawing the object to be treated; the rf generation module 160 is not in operation and can provide cooling energy to the thawing chamber 111. The thawing apparatus 100 further includes a temperature sensor for detecting the temperature of the air inside the thawing chamber 111. The refrigeration system may be further configured to controllably provide refrigeration to the thawing chamber 111 based on the temperature of the air within the thawing chamber 111. When the temperature in the thawing chamber 111 is greater than or equal to a preset temperature threshold and the radio frequency generation module 160 is in a non-working state, cooling the thawing chamber 111; and when the temperature in the thawing chamber 111 is less than the preset temperature threshold value or the radio frequency generation module 160 is in the working state, stopping providing cold energy for the thawing chamber 111. The preset temperature threshold may be a set temperature of the storage compartment in which the thawing device 100 is located, for example, the thawing device 100 is disposed in the freezing compartment 213, and the preset temperature threshold may be-20 to-15 ℃.

The refrigerator 200 may further include a cooling switch for receiving a user-input cooling command for the thawing chamber 111. When the refrigeration switch is in an on state, the refrigeration system can provide cold energy to the thawing chamber 111 in a controlled manner; when the refrigeration switch is in the off state, the refrigeration system cannot provide refrigeration to the thawing chamber 111. The user can open and close the refrigeration switch according to the storage requirement, for example, when enough space is reserved in the storage compartment, the user can close the refrigeration switch, and only the unfreezing chamber 111 is used for unfreezing food, so that the waste of cold energy is avoided, and the energy consumption of the refrigerator 200 is reduced; when the articles to be preserved are too many, the user can open the refrigeration switch after thawing to enable the refrigeration system to provide cold energy for the thawing chamber 111, the articles to be preserved are placed into the thawing chamber 111 for preservation, waste of storage space in the refrigerator 200 is avoided, and user experience is improved. The refrigeration switch may be provided on the refrigeration door body 221 to facilitate the user to adjust the refrigeration switch. The refrigeration switch may also be configured to automatically switch to an off state when the defrost switch is on.

Fig. 13 is a flowchart of a control method for cooling the thawing chamber 111 according to an embodiment of the present invention. Referring to fig. 13, the control method of the refrigeration of the thawing chamber 111 of the present invention may include:

step S1302: judging whether a refrigeration switch is turned on, if so, executing step S1304; if not, go to step S1302.

Step S1304: judging whether the radio frequency generation module 160 is in a working state, if so, executing step S1302; if not, go to step 1306.

Step 1306: judging whether the temperature of the thawing chamber 111 is greater than or equal to a preset temperature threshold, if so, executing step S1308; if not, go to step S1302.

Step S1308: the refrigeration system begins to provide refrigeration to the thawing chamber 111.

Fig. 14 is a flowchart of a thawing control method according to an embodiment of the present invention. Referring to fig. 14, the thawing control method of the present invention may include the steps of:

step S1402: judging whether the unfreezing switch is turned on, if so, executing a step S1404; if not, step S1402 is executed.

Step S1404: determining whether the protection switch is turned on (i.e., determining whether the front circumferential side 1211 is turned off), if so, performing step S1406; if not, go to step S1404.

Step S1406: the rf generating module 160 generates an rf signal, and the detecting module 140 detects an incident wave signal and a reflected wave signal of the rf antenna 130. Step S1408 is executed.

Step S1408: and acquiring the voltage and the current of the incident wave signal and the voltage and the current of the reflected wave signal, and calculating the change rate delta/delta t of the dielectric coefficient of the object to be processed.

Step S1410: judging whether the change rate delta/delta t of the dielectric coefficient of the object to be processed is larger than or equal to a first rate threshold value, if so, executing a step S1412; if not, go to step S1408.

Step S1412: the working power of the rf generation module 160 is reduced by 30-40%. In this step, the operating power of the rf generation module 160 may be reduced by 35%.

Step S1414: and acquiring the voltage and the current of the incident wave signal and the voltage and the current of the reflected wave signal, and calculating the change rate delta/delta t of the dielectric coefficient of the object to be processed.

Step S1416: judging whether the change rate delta/delta t of the dielectric coefficient of the object to be processed is less than or equal to a second rate threshold value, if so, executing a step S1418; if not, go to step S1414.

Step S1418: the rf generation module 160 stops operating and the defrost switch resets (i.e., closes).

The following steps may be further included after step S1406:

step S1420: the voltage and current of the incident wave signal and the voltage and current of the reflected wave signal are obtained, and the load impedance Z2 of the rf generation module 160 is calculated.

Step S1422: determining whether a difference between the load impedance Z2 of the rf generation module 160 and the output impedance Z1 is smaller than a first impedance threshold, if yes, performing step S1424; if not, go to step S1426.

Step S1424: the motor of the load compensation module 180 operates to increase the impedance of the compensation unit. Returning to step S1420.

Step S1426: determining whether a difference between the load impedance Z2 of the rf generation module 160 and the output impedance Z1 is greater than a second impedance threshold, if yes, performing step S1428; if not, go to step S1420.

Step S1428: the motor of the load compensation module 180 operates to reduce the impedance of the compensation unit. Returning to step S1420.

The work flow of the refrigerator 200 according to an embodiment of the present invention may include: when the user turns on the thawing switch and the front circumferential side panel 1211 is closed, the rf generation module 160 generates an rf signal and the detection module 140 and the load compensation module 180 start to operate. The detection module 140 detects the incident wave signal and the reflected wave signal of the rf antenna 130, and calculates the load impedance Z2 of the rf transmitter and the change rate Δ/Δ t of the dielectric constant. When the change rate Δ/Δ t of the dielectric coefficient of the object to be processed is greater than or equal to the first rate threshold, the working power of the rf generation module 160 is reduced by 35%, and meanwhile, in the whole thawing workflow, when the difference between the load impedance Z2 and the output impedance Z1 of the rf generation module 160 is smaller than the first impedance threshold or greater than the second impedance threshold, the load compensation module 180 adjusts the impedance of the compensation unit through the motor, and further adjusts the load impedance Z2 of the rf generation module 160, so that the difference between the load impedance Z2 and the output impedance Z1 of the rf generation module 160 is always greater than or equal to the first impedance threshold and less than or equal to the second preset threshold. When the change rate delta/delta t of the dielectric coefficient of the object to be processed is smaller than or equal to the second rate threshold, the radio frequency generation module 160 stops working, and the unfreezing switch is automatically switched to the off state.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. The air-cooled refrigerator comprises a box body limited with at least one storage chamber, chamber air supply air ducts respectively arranged in the at least one storage chamber, and a unfreezing device arranged in one storage chamber, wherein the unfreezing device comprises a barrel limited with a unfreezing chamber, a radio frequency generation module used for generating radio frequency signals, and a radio frequency antenna used for generating radio frequency waves in the unfreezing chamber according to the radio frequency signals, and the unfreezing device comprises a barrel limited with a unfreezing chamber

Each device air inlet is provided with a device air inlet door which is configured to be capable of controllably switching on and off a gas flow path between the corresponding device air inlet and the chamber air inlet; wherein

The thawing device is configured to judge the thawing progress of the object to be treated according to the change rate of the dielectric coefficient of the object to be treated in the thawing chamber; and the thawing apparatus further comprises:

the load compensation module is configured to controllably increase or decrease the load impedance of the radio frequency generation module and enable the difference between the load impedance and the output impedance of the radio frequency generation module to be greater than or equal to a first impedance threshold value and smaller than or equal to a second impedance threshold value.

2. The air-cooled refrigerator of claim 1, wherein the device intake damper is configured to:

3. The air-cooled refrigerator of claim 2, wherein the air-cooled refrigerator further comprises:

and when the refrigeration switch is turned off, switching to an off state.

4. The air-cooled refrigerator of claim 2 or 3, wherein the air-cooled refrigerator is provided with a cooling fan

The device air intake door is further configured to switch its open and closed states according to the temperature in the thawing chamber;

5. The air-cooled refrigerator of claim 1, wherein the defrosting apparatus further comprises:

when the change rate of the dielectric coefficient of the object to be treated is greater than or equal to a first rate threshold value, the working power of the object to be treated is reduced by 30% -40% so as to prevent the object to be treated from being excessively thawed; and/or

6. A control method of an air-cooled refrigerator, the air-cooled refrigerator comprises at least one storage compartment, compartment air supply air ducts and a unfreezing device, the compartment air supply air ducts are respectively arranged in the at least one storage compartment, the unfreezing device comprises a barrel body limited with a unfreezing chamber, a radio frequency generation module used for generating radio frequency signals and a radio frequency antenna used for generating radio frequency waves in the unfreezing chamber according to the radio frequency signals, the barrel body is provided with at least one chamber air inlet, the compartment air supply air ducts are provided with compartment air inlets and at least one device air inlet used for conveying cooling air to the chamber air inlets, and each device air inlet is provided with a device air inlet air door capable of opening and closing a gas flow path between the device air inlets and the chamber air inlets, wherein the control method comprises the:

if yes, the air inlet door of the device is switched to an open state;

if not, the air inlet door of the device is switched to a closed state; and the control method further comprises:

acquiring the change rate of the dielectric coefficient of the object to be processed in the thawing chamber;

judging the thawing progress of the object to be treated according to the change rate; and the control method further comprises:

and adjusting the load impedance of the radio frequency generation module to enable the difference between the load impedance and the output impedance of the radio frequency generation module to be larger than or equal to a first impedance threshold value and smaller than or equal to a second impedance threshold value.

7. The control method of claim 6, the air-cooled refrigerator further comprising a refrigeration switch for receiving a defrost chamber refrigeration command, wherein prior to the device intake damper being switched to the open state, further comprising:

judging whether the refrigeration switch is turned on or not;

if yes, the air inlet door of the device is switched to an open state;

if not, the air inlet door of the device is switched to a closed state.

8. The control method of claim 7, wherein prior to the device intake damper switching to an open state, further comprising:

if yes, the air inlet door of the device is switched to an open state;

if not, the air inlet door of the device is switched to a closed state.

9. The control method according to claim 6, the thawing device further comprising a detection module for detecting an incident wave signal and a reflected wave signal of the radio frequency antenna, wherein the control method further comprises:

acquiring the radio frequency wave signal and the reflected wave signal;

10. The control method according to claim 6, the thawing device further comprising a detection module for detecting an incident wave signal and a reflected wave signal of the radio frequency antenna, wherein the control method further comprises:

acquiring the radio frequency wave signal and the reflected wave signal;

if yes, the radio frequency generation module stops working.