CN109000400B - side door refrigerator - Google Patents

Abstract

The invention provides a side-by-side combination refrigerator. The side-by-side combination refrigerator comprises a refrigerator body, a refrigerating door body, a freezing door body and a unfreezing device, wherein the refrigerator body is used for limiting a refrigerating chamber and a freezing chamber, the refrigerating door body and the freezing door body are oppositely arranged and are respectively arranged at the two transverse ends of the front side of the refrigerator body in a pivoting mode, and the unfreezing device is arranged. The thawing apparatus comprises: a barrel defining a thawing chamber having a forward opening therein for placing an object to be treated; the device door body is arranged at the front opening of the unfreezing chamber and used for opening and closing the unfreezing chamber; a radio frequency generation module configured to generate a radio frequency signal; and the upper electrode plate and the lower electrode plate are respectively and horizontally arranged at the top wall and the bottom wall of the unfreezing chamber and are respectively and electrically connected with the radio frequency generating module so as to generate radio frequency waves with corresponding frequency in the unfreezing chamber according to radio frequency signals and unfreeze the object to be processed in the unfreezing chamber, and the unfreezing device is arranged in the freezing chamber. The unfreezing device is arranged in the freezing chamber of the side-by-side combination refrigerator, so that a user can conveniently take and place objects to be processed, and the convenience of the user is improved.

Description

side door refrigerator

technical field

The invention relates to the field of thawing, in particular to a side-by-side refrigerator with a quick thawing function.

Background technique

The quality of the food is preserved during the freezing process, however frozen food needs to be thawed before being processed or eaten. In order to facilitate users to freeze and thaw food, in the prior art, generally, a heating device or a microwave device is provided in the refrigerator to thaw the food.

However, thawing food through a heating device generally requires a long thawing time, and the thawing time and temperature are not easy to control, which is easy to cause the evaporation of water and the loss of juice, and the quality of the food is lost; thawing food through a microwave device, the speed It is fast and efficient, so the loss of nutrients in food is very low, but due to the difference in the penetration and absorption of water and ice by microwaves, and the uneven distribution of the internal material of the food, the melted area absorbs more energy, which is easy to produce thawing. Problems with uneven and localized overheating. Taking into account comprehensively, a side-by-side refrigerator with high thawing efficiency, uniform thawing and food quality assurance is required in design.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a side-by-side refrigerator with convenient defrosting.

A further object of the present invention is to avoid excessive thawing of the product to be treated.

In particular, the present invention provides a side-by-side refrigerator, comprising a box body defining a refrigerating compartment and a freezing compartment, a refrigerating door body disposed oppositely and pivotably disposed at both lateral ends of the front side of the box body, and A freezing door body, and a thawing device, the thawing device includes:

a barrel, defining a thawing chamber with a forward opening therein, the thawing chamber for placing the object to be processed;

a device door, disposed at the forward opening of the thawing chamber, for opening and closing the thawing chamber;

a radio frequency generation module configured to generate radio frequency signals; and

The upper electrode plate and the lower electrode plate are arranged horizontally on the top wall and the bottom wall of the thawing chamber respectively, and are respectively electrically connected with the radio frequency generating module, so as to generate in the thawing chamber according to the radio frequency signal radio frequency waves of the corresponding frequency, and thaw the objects to be processed in the thawing chamber; and

The thawing device is installed in the freezing compartment.

Optionally, the rear plate of the cylinder is provided with a device air inlet, and a gap is left between the rear plate of the cylinder and the rear wall of the freezer compartment, so that the air in the freezer compartment can pass through the freezer compartment. a device air inlet into the thawing chamber; and

The side plates on both lateral sides of the cylinder body are provided with device air outlets, and there are gaps between the side plates on the lateral sides of the cylinder body and the side walls on both lateral sides of the freezing compartment, so that the The gas in the thawing chamber is discharged to the freezing compartment through the air outlet of the device.

Optionally, the distance between the rear wall of the cylinder and the side plates on both lateral sides and the rear wall and the side walls on both lateral sides of the corresponding freezing compartment is 2-3 mm.

Optionally, the refrigerator is an air-cooled refrigerator;

The freezing compartment includes an air duct cover, which is sandwiched with the back wall of the inner bladder of the freezing compartment to form a freezing air duct, and a freezing air inlet is opened on the air duct cover to provide the freezer compartment provides cooling; and

The freezing compartment defines a plurality of accommodating spaces, and the freezing air inlet is located in the second accommodating space from bottom to top of the freezing compartment;

The thawing device is arranged in the second accommodating space, so that the refrigerating air duct provides cooling capacity for the thawing device.

Optionally, the projection of the device air inlet in the thickness direction of the air duct cover plate is in the freezing air inlet, so that the freezing air duct provides cooling capacity for the thawing device.

Optionally, the freezing door body is provided with a thawing switch for controlling the start or stop of the thawing procedure; and the radio frequency generating module is configured as:

When the thawing switch is turned on, start work;

When the defrost switch is turned off, it stops working.

Optionally, the thawing device further includes:

An infrared sensor is arranged on the inner wall of the thawing chamber to sense whether the object to be processed is placed in the thawing chamber.

Optionally, the side-by-side refrigerator is configured as:

When the defrosting switch is turned on, stop providing cooling capacity for the freezing compartment;

When the object to be processed is taken out from the thawing chamber, run the original refrigeration program of the side-by-side refrigerator;

When the to-be-processed object is not taken out of the thawing chamber for a period of time greater than or equal to a predetermined time threshold after the thawing of the object to be processed is completed, cooling capacity is provided for the freezing compartment.

Optionally, the side-by-side refrigerator further includes:

The detection module is configured to detect the incident wave signal and the reflected wave signal connecting the electrical connection line between the radio frequency generation module and the upper electrode plate, and according to the voltage and current of the incident wave signal and the reflected wave signal The voltage and current are used to calculate the rate of change of the dielectric coefficient of the object to be treated, so as to judge the thawing progress of the object to be treated.

Optionally, the radio frequency generation module is configured as:

When the rate of change of the dielectric coefficient of the object to be processed is greater than or equal to the first rate threshold, the operating power of the object to be processed is reduced by 30% to 40% to prevent the object to be processed from being over-thawed; and/or

When the rate of change of the permittivity of the object to be treated drops to less than or equal to the second rate threshold, the operation is stopped.

In the present invention, the defrosting device is arranged in the freezing compartment of the side-by-side refrigerator, which facilitates the user to take and place the objects to be treated, and improves the convenience of the user.

Further, the present invention determines the thawing progress of the object to be processed by calculating the change rate of the dielectric coefficient of the object to be processed by the detection module. Before the present invention, those skilled in the art generally believe that when the temperature of the object to be treated is already high (that is, the temperature of the object to be treated is greater than or equal to -7°C), the thermal effect will be significantly attenuated, so the object to be treated will not be excessively thawed . However, this is not the case in practice. Usually, the radio frequency thawing power is relatively large, for example, greater than 100W. When the temperature of the object to be treated is already high, the object to be treated is easily thawed excessively. The inventor of the present application has creatively realized that when the temperature of the object to be treated is already high, reducing the working power of the radio frequency generating module by 30-40% can effectively prevent the object to be treated from being overly thawed. Further, the present invention judges whether the thawing is completed by the rate of change of the dielectric coefficient of the object to be treated. Compared with the prior art to judge whether the thawing is complete by sensing the temperature of the object to be treated, the judgment is more accurate, and the thawing can be further prevented. The object to be treated is over-thawed, and tests show that the temperature of the object to be thawed by the thawing device of the present invention is generally -4 to -2° C. when thawing is completed, which can avoid the generation of bloody water when the object to be processed is meat.

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

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of example and not limitation with reference to the accompanying drawings. The same reference numbers in the figures designate the same or similar parts or parts. It will be understood by those skilled in the art that the drawings are not necessarily to scale. In the attached picture:

1 is a schematic structural diagram of a side-by-side refrigerator according to an embodiment of the present invention, wherein all outer doors of the side-by-side refrigerator are removed to show the compartment structure in the box of the side-by-side refrigerator;

Figure 2 is a schematic cross-sectional view taken along section line A-A in Figure 1;

Fig. 3 is a schematic partial enlarged view of region B in Fig. 2;

Figure 4 is a schematic cross-sectional view taken along section line C-C in Figure 3;

FIG. 5 is a graph of the rate of change of the permittivity of the object to be treated according to an embodiment of the present invention;

Fig. 6 is the schematic structure diagram of the compressor chamber in Fig. 2;

Figure 7 is a schematic structural diagram of the thawing device in Figure 3, wherein the device door of the thawing device is removed to show the internal structure of the cylinder;

FIG. 8 is a flowchart of a defrosting method for a side-by-side refrigerator according to an embodiment of the present invention.

Detailed ways

1 is a schematic structural diagram of a side-by-side refrigerator according to an embodiment of the present invention, wherein all outer doors of the side-by-side refrigerator are removed to show the compartment structure in the box of the side-by-side refrigerator; A schematic cross-sectional view taken along section line A-A in FIG. 1 ; FIG. 3 is a schematic partial enlarged view of area B in FIG. 2 . Referring to FIGS. 1 to 3 , the side-by-side refrigerator 10 may include a box body 100 defining a refrigerating compartment 110 and a freezing compartment 120 , and refrigerating doors disposed oppositely and pivotably disposed at both lateral ends of the front side of the box body 100 , respectively. body and freezing door body 121 and a defrosting device 200 for defrosting food. In particular, the defrosting device 200 may be provided in the freezing compartment 120 . The defrosting device 200 may be fixed in the freezing compartment 120 by means of interference fit, overlap or snap connection. In the present invention, the thawing device 200 is arranged in the freezing compartment 120 of the side-by-side refrigerator 10, which facilitates the user to take and place the object to be processed, and improves the convenience of the user. For example, the user can place the object to be processed in the thawing chamber 214 in advance, Start the defrosting process when defrosting is required.

In addition, it can also be noted that, as is well known to those skilled in the art, the refrigerating compartment 110 refers to a storage compartment with a storage temperature of 0 to +8° C. for the ingredients; the freezing compartment 120 refers to the storage temperature for the ingredients. For the storage room at -20 ~ -15 ℃.

Specifically, the thawing device 200 may include a cylinder body 210, a device door body 220, a radio frequency generating module 230, and an upper electrode plate 240a and a lower electrode plate 240b. The barrel 210 may include a top plate, a bottom plate, a rear plate, and two opposite lateral side plates, and may define therein a thawing chamber 214 having a forward opening for placing the objects to be processed. The device door 220 may be disposed at the front opening of the thawing chamber 214 for opening or closing the thawing chamber 214 . The device door body 220 can be installed with the cylinder body 210 by a suitable method, such as a left door, a right door, a top door, or a pull-out door. The radio frequency generating module 230 may be configured to generate radio frequency signals (generally referring to radio frequency signals with a frequency of 300KHz˜300GHz). The upper electrode plate 240a and the lower electrode plate 240b can be arranged horizontally on the top wall and the bottom wall of the thawing chamber 214 respectively, and are respectively electrically connected with the radio frequency generating module 230, so as to generate the radio frequency signal in the thawing chamber according to the radio frequency signal generated by the radio frequency generating module 230. The radio frequency waves with corresponding parameters are generated in the chamber 214, and the to-be-processed objects placed in the thawing chamber 214 are thawed. In the present invention, the upper electrode plate 240a is a transmitting antenna; the lower electrode plate 240b is a receiving antenna. In some embodiments, the upper electrode plate 240a and the lower electrode plate 240b may be electrically connected to the radio frequency generating module 230 by using a 50 ohm electrical connection line, respectively.

In some embodiments, the thawing device 200 may further include a detection module 250 . The detection module 250 can be configured to detect the incident wave signal and the reflected wave signal of the electrical connection between the radio frequency generation module 230 and the upper electrode plate 240a, and calculate the voltage and current according to the voltage and current of the incident wave signal and the voltage and current of the reflected wave signal. The load impedance of the radio frequency generating module 230 . The formula for calculating the load impedance is as follows:

SWR=Z ₂ /Z ₁ (1)

Z ₁ =U ₁ /I ₁ =R ₁ +jX ₁ (2)

Z ₂ =U ₂ /I ₂ =R ₂ +jX ₂ (3)

In formulas (1), (2), (3): SWR is the standing wave ratio; Z ₁ is the output impedance; Z ₂ is the load impedance; U ₁ is the incident wave voltage; I ₁ is the incident wave current; R ₁ is the output resistance; X ₁ is the output reactance; U ₂ is the reflected wave voltage; I ₂ is the reflected wave current; R ₂ is the load resistance _; The impedance of the electrical connection between the module 230 and the upper electrode plate 240a, and the load impedance is the impedance of the object to be processed).

The thawing device 200 may also include a load compensation module 260 . The load compensation module 260 may include a compensation unit and a motor for adjusting the impedance of the compensation unit. The compensation unit can be set in series with the object to be processed, that is, the load impedance of the radio frequency generating module 230 is the sum of the impedance of the object to be processed and the impedance of the compensation unit. The motor can be configured to controllably increase or decrease the impedance of the compensation unit, thereby increasing or decreasing the load impedance Z 2 of the radio frequency generating module 230 , and making the load impedance Z ₂ of the radio frequency generating module 230 and the output impedance Z 1 between the load impedance Z ₂ and the output impedance Z ₁ . The difference (that is, the value obtained by subtracting the output impedance Z ₁ from the load impedance Z ₂ ) is greater than or equal to a first impedance threshold and less than or equal to a second impedance threshold, and the first impedance threshold is less than the second impedance threshold, so as to improve the resistance of the object to be processed. Thawing efficiency. In some preferred embodiments, the _first impedance threshold is -6--4% of the output impedance Z1, and the second impedance threshold is 4-6% _of the output impedance Z1. Further preferably, the first impedance threshold is -5% of the output impedance Z ₁ , and the second impedance threshold is 5% of the output impedance Z ₁ . In other words, the load compensation module can be configured so that the absolute value of the difference between the load impedance Z ₂ of the radio frequency generating module 230 and the output impedance Z ₁ is always less than 5% of the output impedance Z ₁ during the whole thawing process, for example, it can be output ₁ %, 3% or 5% of impedance Z1.

The detection module 250 may be configured to further calculate the permittivity of the object to be processed and the rate of change of the permittivity according to the load impedance Z ₂ of the radio frequency generating module 230 to determine the thawing progress of the object to be processed. The formula for calculating the permittivity of the object to be treated is as follows:

X ₂ =1/2πfC (4)

ε=4πKdC/S (5)

In formulas (4) and (5): f is the frequency of the radio frequency wave; C is the capacitance of the capacitor formed by the upper electrode plate 240a and the lower electrode plate 240b; ε is the dielectric coefficient of the object to be treated; K is the electrostatic constant; d is the thickness of the upper electrode plate; S is the area of the upper electrode plate.

The rate of change of the permittivity of the object to be treated can be obtained by calculating the change value Δε of the permittivity ε within a unit time Δt, where the unit time Δt can be 0.1 second to 1 second, such as 0.1 second, 0.5 second or 1 second. 5 is a graph of the rate of change of the permittivity of the object to be processed according to an embodiment of the present invention (the ordinate is the rate of change of the permittivity of the object to be processed Δε/Δt; the abscissa is the thawing time t of the object to be processed , the unit is min). Referring to FIG. 5 , in some preferred embodiments, the radio frequency generation module 230 may be configured to reduce its operating power by 30% to 40% when the rate of change Δε/Δt of the dielectric coefficient of the object to be processed is greater than or equal to the first rate threshold. For example, 30%, 35% or 40%, to prevent the object to be treated from being over-thawed (those skilled in the art can understand that the temperature of over-thawed object is greater than 0°C). The first rate threshold may be 15-20, such as 15, 17, 18 or 20. The radio frequency generating module 230 can also be configured to stop working when the rate of change Δε/Δt of the dielectric coefficient of the object to be processed drops to less than or equal to the second rate threshold. The second rate threshold may be 1-2, such as 1, 1.5 or 2.

As the temperature of the object to be treated changes, the permittivity of the object to be treated will also change, which is well known to those skilled in the art, but the permittivity is usually measured by a special instrument (such as a permittivity tester), In addition, the special instrument occupies a large space and has a high cost, and is not suitable for refrigerators. By detecting the incident wave signal and the reflected wave signal of the electrical connection between the radio frequency generating module 230 and the upper electrode plate 240a, the present invention calculates the dielectric coefficient of the object to be processed, occupies less space and has low cost, and is especially suitable for refrigerators thawing device in . And through the load compensation module 260, the difference between the load impedance and the output impedance of the radio frequency generating module 230 is within a preset range (greater than or equal to a first impedance threshold and less than or equal to a second impedance threshold), which improves the thawing of the object to be processed. efficiency.

Further, the present invention determines the thawing progress of the object to be processed by calculating the change rate of the dielectric coefficient of the object to be processed by the detection module 250 . Before the present invention, those skilled in the art generally believe that when the temperature of the object to be treated is already high (that is, the temperature of the object to be treated is greater than or equal to -7°C), the thermal effect will be significantly attenuated, so the object to be treated will not be excessively thawed . However, this is not the case in practice. Usually, the radio frequency thawing power is relatively large, for example, greater than 100W. When the temperature of the object to be treated is already high, the object to be treated is easily thawed excessively. The inventor of the present application creatively realizes that when the temperature of the object to be treated is already high, reducing the working power of the radio frequency generating module 230 by 30-40% can effectively prevent the object to be treated from being over-thawed. Further, the present invention judges whether the thawing is completed by the rate of change of the dielectric coefficient of the object to be treated. Compared with the prior art to judge whether the thawing is complete by sensing the temperature of the object to be treated, the judgment is more accurate, and the thawing can be further prevented. The object to be treated is over-thawed, and tests show that the temperature of the object to be thawed by the thawing device of the present invention is generally -4 to -2° C. when thawing is completed, which can avoid the generation of bloody water when the object to be processed is meat.

FIG. 6 is a schematic structural diagram of the compressor chamber 130 in FIG. 2 . Referring to FIG. 6 , the box body 100 of the side-by-side refrigerator 10 further defines a compressor chamber 130 . The compressor room 130 may include a main control board 133 for controlling the operation of the side-by-side refrigerator 10, a compressor 131, a condensed water collecting structure 134, and an external power line (not shown in the figure) for supplying power for the operation of the side-by-side refrigerator 10. Shows). In some embodiments, the side-by-side refrigerator 10 may further include a power supply module 132 for powering the radio frequency generating module 230 . The power supply module 132 may be disposed in the compressor compartment 130 of the side-by-side refrigerator 10 to facilitate heat dissipation and maintenance of the power supply module 132 . The power supply module 132 can be fixed on the upper wall of the compressor room 130 to facilitate the electrical connection between the radio frequency generating module 230 and the power supply module 132 .

In some embodiments, the power supply module 132 may be a DCDC converter. The DCDC converter can be configured to be electrically connected to the main control board 133 to supply power to the defrosting device 200 . The DCDC converter can be disposed between the main control board 133 and the compressor 131 , so that the electrical connection with the main control board 133 is more convenient. In other embodiments, the power supply module 132 may be an ACDC converter. The ACDC converter may be configured to be electrically connected to an external power source of the refrigerator 10 . Those skilled in the art can understand that it is easy to connect the various components of the thawing device 200 with the control circuit of the refrigerator 10 .

FIG. 4 is a schematic cross-sectional view taken along section line C-C in FIG. 3 . Referring to FIGS. 3 and 4 , the barrel 210 may further include a vertical partition 211 and a horizontal partition 212 for defining an inner space of the barrel 210 . The vertical partition 211 may be disposed to extend from the top plate of the cylinder body 210 to the bottom plate of the cylinder body 210 in the vertical direction. The radio frequency generating module 230 may be disposed between the vertical partition plate 211 and the rear plate of the cylinder body 210 . The horizontal partitions 212 may be disposed to extend forward in a horizontal direction from the vertical partitions 211 . The detection module 250 and the load compensation module 260 may be disposed between the horizontal partition 212 and the top plate of the cylinder body 210. The thawing chamber 214 may be enclosed by a vertical partition 211 , a horizontal partition 212 , and the bottom plate and two lateral side plates of the cylinder 210 . The upper electrode plate 240 a may be disposed on the lower surface of the horizontal separator 212 , and the lower electrode plate 240 b may be disposed on the upper surface of the bottom plate of the cylindrical body 210 . The cylinder body 210 may further include a baffle plate 213 extending upward from the front end of the horizontal partition plate 212 to the top plate of the cylinder body 210 in the vertical direction, so as to prevent the detection module 250 and the load compensation module 260 from being exposed and reduce the thaw rate of the thawing device 200 . Aesthetics. In other embodiments, according to the actual situation (the size of the radio frequency generation module 230 , the detection module 250 and the load compensation module 260 ), the horizontal partition plate 212 can be set to be forward in the horizontal direction from the rear plate of the cylinder 210 Extending, the vertical partition plate 211 is arranged to extend from the horizontal partition plate 212 to the bottom plate of the cylinder body 210 along the vertical direction.

The vertical partition plate 211 may be provided with a first wire opening 2112 , so that the radio frequency generating module 230 is electrically connected to the upper electrode plate 240 a through the first wire opening 2112 . The rear plate of the cylinder body 210 may be provided with a second wire opening 216 , so that the electrical connection of the thawing device 200 can be led out from the second wire opening 216 and connected to the power supply module 132 .

In some embodiments, a device air inlet 215 may be opened on the rear plate of the cylinder body 210 , and a defrosting air inlet 2111 may be opened on the vertical partition 211 on the rear side of the thawing chamber 214 , so that the air in the freezing compartment 120 can be opened. The thawing chamber 214 of the thawing device 200 is entered through the device air inlet 215 and the defrosting air inlet 2111 . Device air outlets 218 may be opened on the side plates on both lateral sides of the cylinder body 210 , so that the gas in the thawing chamber 214 is discharged to the freezing compartment 120 through the device air outlets 218 . The rear plate of the cylinder body 210 may have a gap with the rear wall of the freezing compartment 120, so that the air in the freezing compartment 120 can enter into the thawing device 200. The side plates on both lateral sides of the cylinder body 210 and the side walls on both lateral sides of the freezing compartment 120 may have gaps, so that the gas in the defrosting device 200 can be discharged into the freezing compartment 120 . When the side-by-side refrigerator 10 is a direct cooling refrigerator, the rear wall of the freezing compartment 120 is the rear wall of the inner tank; when the side-by-side refrigerator 10 is an air-cooling refrigerator, the rear wall of the freezing compartment 120 is the inner air duct cover the front surface of the board.

In some preferred embodiments, the distance between the rear panel and the side panels on both lateral sides of the cylinder body 210 and the corresponding rear wall and side walls on both lateral sides of the freezing compartment 120 may be 2-3 mm, such as 2 mm, 2.5 mm or 3 mm, to ensure that the defrosting chamber 214 has a larger effective volume while ensuring that the defrosting device 200 has an appropriate air inlet and outlet air volume.

In some embodiments, the side-by-side refrigerator 10 according to the present invention may be an air-cooled refrigerator, and the freezer compartment 120 may include an air duct cover 122. The air duct cover 122 is sandwiched with the inner wall of the freezer compartment 120 to form a freezer air duct, and a freezer air inlet 1221 is opened on the air duct cover 122 to provide cooling capacity for the freezer compartment 120 . In some preferred embodiments, the freezing compartment 120 may define a plurality of accommodating spaces, that is, the number of accommodating spaces defined in the freezing compartment may be two, three or more, and the thawing device 200 may be disposed adjacent to In the accommodating space of the refrigerating air inlet 1221 . Referring to FIG. 2 , since the freezing air inlet 1221 is usually arranged in the second accommodating space from the bottom to the top of the freezing compartment 120 , the defrosting device 200 is preferably arranged in the second accommodating space from the bottom to the top of the freezing compartment 120 . , so that the refrigerating air duct provides cooling capacity for the thawing device 200 . In some further preferred embodiments, the projection of the device air inlet 215 of the thawing device 200 in the thickness direction of the air duct cover plate 122 may be within the freezing air inlet 1221, so as to cool the thawing chamber 214 of the thawing device 200 .

According to the present invention, the thawing device 200 is provided with the device air inlet 215 and the device air outlet 218. When no thawing command is received, the thawing chamber 214 can be used to place food materials, so that the storage space in the freezing compartment 120 can be fully obtained. use.

In some preferred embodiments, the device air inlet 215 and the defrosting air inlet 2111 of the defrosting device 200 may be disposed on both lateral sides of the radio frequency generating module 230 to facilitate heat dissipation of the radio frequency generating module 230 . In some alternative embodiments, the device air inlet 215 and the defrosting air inlet 2111 of the defrosting device 200 may be disposed on the same side of the radio frequency generating module 230 .

The thawing device 200 may also include a tray 270 . The tray 270 is disposed in the thawing chamber 214 , and the objects to be processed are placed on the tray 270 . The tray 270 may be configured to be controllably moved in the depth direction of the thawing chamber 214 to facilitate placement and removal of items to be processed. In some preferred embodiments, the distance between the lower surface of the tray 270 and the lower electrode plate 240b may be 8-12 mm, such as 8 mm, 10 mm, 12 mm, to prevent friction with the lower electrode plate 240b during the pulling process of the tray 270 .

In some embodiments, the freezing door body 121 may be provided with a defrosting switch 123 for controlling the start or stop of the defrosting procedure. In some preferred embodiments, the defrosting switch 123 is disposed above the freezing door body 121 to facilitate the user to adjust the defrosting switch 123 . The radio frequency generating module 230 can be configured to start working when the defrosting switch 123 is turned on; and stop working when the defrosting switch 123 is turned off. During the defrosting process, the user can terminate the defrosting procedure by turning off the defrosting switch 123 . A buzzer (not shown in the figure) may also be provided on the door of any compartment to remind the user that the object to be processed has been thawed. The buzzer can be configured to start working when the detection module 250 judges that the thawing of the object to be processed is completed (when the rate of change of the dielectric coefficient of the object to be processed drops to less than or equal to the second rate threshold); when the object to be processed is removed from the thawing chamber 214 when taken out, stop working.

The thawing device 200 may also include an infrared sensor 219 . The infrared sensor 219 can be disposed on the inner wall of the thawing chamber 214 to sense whether the object to be processed is placed in the thawing chamber 214 . In some preferred embodiments, the refrigeration system of the side-by-side refrigerator 10 can be configured to stop providing cooling capacity for the freezing compartment 120 when the defrosting switch 123 is turned on, so as to avoid affecting the defrosting of the objects to be processed by the thawing device 200; After the material is thawed, when it is taken out from the thawing chamber 214 within a predetermined time threshold, the original refrigeration program of the side-by-side refrigerator 10 is run; when the material to be processed is thawed, the time it has not been taken out from the thawing chamber 214 is greater than or equal to At a predetermined time threshold, cooling capacity is provided for the freezing compartment 120 . That is, when the time when the object to be processed is not taken out from the thawing chamber 214 is less than the predetermined time threshold, the temperature in the thawing chamber 214 remains unchanged, so that the object to be processed has been in a thawed state during this period of time, so as to facilitate the user. Use the object to be treated; when the time that the object to be treated is not taken out of the thawing chamber 214 is greater than or equal to the preset time threshold, the refrigeration system provides cooling capacity for the freezing compartment 120, and re-freezes the object to be treated to ensure the quality. In the present invention, a timer in the side-by-side refrigerator 10 can record the time that the to-be-processed object is not taken out of the thawing chamber 214 after the thawing is completed. The predetermined time threshold may be 15-25 minutes, such as 15 minutes, 20 minutes or 25 minutes.

FIG. 7 is a schematic structural diagram of the thawing device in FIG. 3 , wherein the device door of the thawing device is removed to show the internal structure of the cylinder. Referring to Figures 1 and 7, the barrel 210 and the device door 220 may be provided with electromagnetic shielding features 217, respectively. The electromagnetic shielding feature 217 disposed on the cylinder 210 and the electromagnetic shielding feature 217 disposed on the device door 220 can be electrically connected to reduce the amount of magnetic leakage from the defrosting device 200 when the device door 220 is closed. The electromagnetic shielding feature 217 may be a conductive coating applied to the inner wall of the barrel 210 and the inner surface of the device door 220 (the surface facing the barrel 210 ), abutting against the inner wall of the barrel 210 and the inner surface of the device door 220 . The conductive metal mesh on the surface or the conductive metal mesh formed in each plate body surrounding the cylinder body 210 and in the device door body 220, etc.

In some preferred embodiments, the defrosting device 200 may further include an elastic conductive ring 280 . The elastic conductive ring 280 can be disposed at the periphery of the forward opening of the thawing chamber 214 , so that when the device door 220 is closed, the elastic conductive ring 280 is squeezed and deformed to closely fit with the device door 220 , that is, the elastic conductive ring 280 A seal is formed with the device door body 220 . The electromagnetic shielding feature 217 disposed on the cylinder body 210 and the electromagnetic shielding feature 217 disposed on the device door body 220 can be respectively arranged to be in conductive contact with the elastic conductive ring 280, so as to reduce the thawing device 200 outward when the device door body 220 is closed. of magnetic leakage.

In some preferred embodiments, the elastic conductive ring 280 may be made of silicone, silicone fluoride, EPDM, fluorocarbon-silicon fluoride, and silver plated aluminum. The elastic conductive ring 280 can be a hollow annular structure, so that when the device door 220 is closed, it closely fits with the device door 220 . The width of the elastic conductive ring 280 may be 20-30 mm, such as 20 mm, 25 mm or 30 mm, so as to improve the sealing performance of the defrosting device 200. In some preferred embodiments, the device air inlet 215 , the thawing air inlet 2111 and the device air outlet 218 of the thawing device 200 may all be provided with conductive metal meshes 290 , and the conductive metal meshes 290 may be arranged to shield electromagnetically from the electromagnetic shielding provided on the cylinder body 210 . Features 217 are conductively connected to reduce the amount of magnetic leakage from thawing device 200 .

In particular, in the present invention, the radio frequency signal (ie the electromagnetic wave used to thaw the object to be processed) generated by the radio frequency generating module 230 may be a preset fixed frequency in the range of 40-42MHz, such as 40MHz, 40.48MHz, 40.68MHz, 41MHz or 42MHz, in order to reduce the thawing time of the object to be treated, improve the temperature uniformity of the object to be treated and reduce its juice loss rate. In a preferred embodiment, the frequency of the radio frequency wave can be a preset fixed frequency in the range of 40.48-40.68 MHz, so as to further reduce the thawing time of the object to be processed, improve the temperature uniformity of the object to be processed, and reduce the rate of juice loss. . Among them, when the frequency of the radio frequency wave is 40.68MHz, the thawing effect is the best.

In order to further understand the present invention, the preferred embodiments of the present invention are described below with reference to more specific examples, but the present invention is not limited to these examples.

Table 1

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Frequency (MHz) 40 40.48 40.68 41 42 13.56 27.12

In the thawing devices 200 respectively provided with the radio frequencies of the above-mentioned Embodiments 1-5 and Comparative Examples 1-2, the power of the radio frequency wave is 100W, and the structure and working process of the thawing device 200 are the same.

The thawing effect test was carried out on the thawing device 200 provided with the frequencies of each embodiment and each comparative example. Test description: Select 1kg of beef with the same shape and specification and an initial temperature of -18°C, place it on the tray 270 in the thawing device 200 of each example and each comparative example, and measure the thawing of each example and each comparative example. Time, temperature uniformity and juice loss rate, wherein the thawing time is the time from the start of thawing to the time from when the thawing device 200 judges that the thawing is completed (that is, the radio frequency generation module 230 stops working); temperature uniformity: after the thawing is completed, measure four beef The temperature of the corners and the center point, and calculate the difference between the temperature of the center point and the average value of the four corners, and the temperature uniformity is the ratio of the difference to the average value; juice loss rate: measure the weight of the beef before thawing respectively and the weight after thawing, and calculate the difference between the two, and the juice loss rate is the ratio of the difference to the weight of the beef before thawing.

Table 2 shows the test results of thawing effect according to Examples 1-7 and according to Comparative Examples 1-2.

Table 2

Thawing time (min) temperature uniformity Juice loss rate (%) Example 1 19 0.4 0.35 Example 2 18 0.4 0.32 Example 3 18 0.3 0.29 Example 4 19 0.5 0.35 Example 5 20 0.5 0.40 Comparative Example 1 25 0.6 0.35 Comparative Example 2 twenty three 0.6 0.40

According to the test results of Example 5 and Comparative Example 1 in Table 2, it can be seen that when the power of the radio frequency wave is the same, and the structure of the thawing device 200 and its work flow are the same, the present invention is applied under the same test conditions. The thawing effect of the radio frequency thawing device 200 within the scope of the embodiment is better than that of the thawing device 200 using the radio frequency frequency in the prior art, the thawing time of the former is reduced by 20%, and the temperature uniformity is improved by 17%.

According to the test results of Examples 1-5 in Table 2, it can be seen that the thawing time of the thawing device 200 using each embodiment of the present invention is all below 20min, the temperature uniformity is all below 0.5, and the juice loss rate is all below 0.40% . By further optimizing the frequency of the radio frequency wave (for example, the radio frequency frequency is 40.48-40.68MHz), the thawing time of the thawing device 200 can be reduced to less than 18 minutes, the temperature uniformity can be increased to less than 0.4, and the juice loss rate can be reduced to less than 0.32%.

FIG. 8 is a flowchart of a defrosting method for the side-by-side refrigerator 10 according to an embodiment of the present invention. Referring to FIG. 8 , the defrosting method of the side-by-side refrigerator 10 of the present invention may include the following steps:

Step S802: Determine whether the defrosting switch 123 is turned on, if yes, go to step S804; if not, go to step S802.

Step S804: The power supply module 132 starts to work.

Step S806: Determine whether the device door 220 is closed, if yes, go to step S808; if not, go to step S806. In this step, the opening and closing state of the device door body 220 can be detected by the door opening detection device. The door opening detection device can be detected by a fan-shaped switch, a magnetic switch, a Hall switch, etc., and different electrical signals are respectively generated when the device door body 220 is completely closed or opened to indicate the state of the device door body 220 .

Step S808: the refrigeration system stops providing cooling capacity for the freezing compartment 120, the radio frequency generating module 230 generates a radio frequency signal of 40-42 MHz, and the detection module 250 detects the incident wave signal and the electrical connection between the radio frequency generating module 230 and the upper electrode plate 240a. reflected wave signal. Steps S810 and S811 are executed. In this step, the radio frequency generating module 230 generates a radio frequency signal of 40.68 MHz.

Step S810: Obtain the voltage and current of the incident wave signal and the voltage and current of the reflected wave signal, and calculate the change rate Δε/Δt of the permittivity of the object to be processed.

Step S812: Determine whether the change rate Δε/Δt of the permittivity of the object to be processed is greater than or equal to the first rate threshold, if yes, go to step S814; if not, go to step S810.

Step S814: The working power of the radio frequency generating module 230 is reduced by 30%-40%. In this step, the working power of the radio frequency generating module 230 can be reduced by 35%.

Step S816: Obtain the voltage and current of the incident wave signal and the voltage and current of the reflected wave signal, and calculate the change rate Δε/Δt of the permittivity of the object to be processed.

Step S818: Determine whether the change rate Δε/Δt of the permittivity of the object to be processed is less than or equal to the second rate threshold, if yes, go to step S820; if not, go to step S816.

Step S820 : the power supply module 132 stops working, the defrosting switch 123 is reset (ie, turned off), the original refrigeration program of the refrigerator 10 is run, and the buzzer starts to work.

Step S822: The timer starts counting.

Step S824: Determine whether the object to be processed is taken out from the thawing chamber 214, if yes, go to step S826; if not, go to step S828.

Step S826 : the buzzer stops working, and the original refrigeration program of the side-by-side refrigerator 10 is executed.

Step S828: Determine whether the value of the timer is greater than or equal to the predetermined time threshold, if yes, go to step S830; if not, go to step S824.

Step S830 : the timer is cleared, the buzzer stops working, and the refrigeration system of the side-to-side refrigerator 10 provides cooling capacity for the freezing compartment 120 .

Step S811 : Obtain the voltage and current of the incident wave signal and the voltage and current of the reflected wave signal, and calculate the load impedance Z ₂ of the radio frequency generating module 230 .

Step S813: Determine whether the difference between the load impedance Z ₂ and the output impedance Z ₁ of the radio frequency generating module 230 is smaller than the first impedance threshold, if yes, go to Step S815; if not, go to Step S817.

Step S815 : the motor of the load compensation module 260 works to increase the impedance of the compensation unit. Return to step S811.

Step S817: Determine whether the difference between the load impedance Z ₂ and the output impedance Z ₁ of the radio frequency generating module 230 is greater than the second impedance threshold, if yes, go to Step S819; if not, go to Step S811.

Step S819: The motor of the load compensation module 260 works to reduce the impedance of the compensation unit. Return to step S811.

Those skilled in the art can understand that when the program runs to step S820, the power supply module 132 stops working, that is, the power supply stops, and the radio frequency generating module 230, the detection module 250 and the load compensation module 260 all stop working, that is, when the medium of the object to be processed is stopped. When the rate of change Δε/Δt of the electrical coefficient drops to less than or equal to the second rate threshold, the detection module 250 stops detecting the incident wave signal and the reflected wave signal of the electrical connection between the radio frequency generation module 230 and the upper electrode plate 240a, and the load compensation module 260 stops detecting the incident wave signal and the reflected wave signal. stop working.

A thawing workflow of the side-by-side refrigerator 10 according to an embodiment of the present invention may include: when the user turns on the defrosting switch 123 and the device door 220 is closed, the power supply module 132 starts to supply power, and the refrigeration system of the side-by-side refrigerator 10 stops serving as the freezer compartment 120 provides cooling capacity, the radio frequency generation module 230 generates a radio frequency signal of 40.68 MHz, and the detection module 250 and the load compensation module 260 start to work. The detection module 250 detects the incident wave signal and the reflected wave signal of the electrical connection between the radio frequency generating module 230 and the upper electrode plate, and calculates the load impedance Z ₂ of the radio frequency transmitting device 230 and the change rate Δε/Δt of the dielectric coefficient. When the change rate Δε/Δt of the dielectric coefficient of the object to be processed is greater than or equal to the first rate threshold, the current working power of the radio frequency generating module 230 is reduced by 35%. When the difference between the impedance Z ₂ and the output impedance Z ₁ is less than the first impedance threshold or greater than the second impedance threshold, the load compensation module 260 adjusts the impedance of the compensation unit through the motor, and then adjusts the load impedance Z ₂ of the radio frequency generation module 230 to make The difference between the load impedance Z ₂ and the output impedance Z ₁ of the radio frequency generating module 230 is always greater than or equal to the first impedance threshold and less than or equal to the second impedance threshold. When the change rate Δε/Δt of the permittivity of the object to be processed is less than or equal to the second rate threshold, the power supply module 132 stops power supply, the radio frequency generation module 230, the detection module 250 and the load compensation module 260 stop working, and the buzzer starts to work, The timer starts counting. If the time when the object to be processed is not taken out is less than the preset time threshold, the temperature in the thawing chamber 214 remains unchanged until the user takes out the object to be processed from the thawing chamber 214, the buzzer stops working, and the side-by-side refrigerator 10 operates. If the time when the object to be processed is not taken out is greater than or equal to the preset time threshold, the timer is cleared, the buzzer stops working, and the refrigeration system of the side-by-side refrigerator 10 provides cooling capacity for the freezer compartment 120 .

By now, those skilled in the art will recognize that, although various exemplary embodiments of the present invention have been illustrated and described in detail herein, the present invention may still be implemented in accordance with the present disclosure without departing from the spirit and scope of the present invention. The content directly determines or derives many other variations or modifications consistent with the principles of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. A side-by-side refrigerator comprises a refrigerator body for limiting a refrigerating chamber and a freezing chamber, a refrigerating door body and a freezing door body which are oppositely arranged and can be respectively and pivotally arranged at the two transverse ends of the front side of the refrigerator body, and a thawing device, wherein the thawing device comprises:

a barrel defining a thawing chamber therein having a forward opening for placing an object to be treated;

the device door body is arranged at the front opening of the unfreezing chamber and used for opening and closing the unfreezing chamber;

a radio frequency generation module configured to generate a radio frequency signal; and

the upper electrode plate and the lower electrode plate are respectively horizontally arranged on the top wall and the bottom wall of the unfreezing chamber and are respectively electrically connected with the radio frequency generating module so as to generate radio frequency waves with corresponding frequencies in the unfreezing chamber according to the radio frequency signals and unfreeze the object to be processed in the unfreezing chamber; wherein

The unfreezing device is arranged in the freezing chamber and is configured to judge the unfreezing progress of the object to be processed according to the change rate of the dielectric coefficient of the object to be processed; 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 side by side combination refrigerator of claim 1 wherein

The rear plate of the cylinder is provided with a device air inlet, and a gap is reserved between the rear plate of the cylinder and the rear wall of the freezing chamber, so that air in the freezing chamber enters the unfreezing chamber through the device air inlet; and is

The side plates on the two transverse sides of the barrel are provided with device air outlets, and gaps are reserved between the side plates on the two transverse sides of the barrel and the side walls on the two transverse sides of the freezing chamber, so that gas in the thawing chamber is discharged to the freezing chamber through the device air outlets.

3. The side by side combination refrigerator of claim 2 wherein

The distance between the rear wall of the barrel and the side plates on the two transverse sides and the rear wall of the corresponding freezing chamber and the side walls on the two transverse sides is 2-3 mm.

4. The side by side combination refrigerator of claim 2 wherein

The refrigerator is an air-cooled refrigerator;

the freezing chamber comprises an air duct cover plate, the air duct cover plate and the rear wall of the liner of the freezing chamber are clamped to form a freezing air duct, and a freezing air inlet is formed in the air duct cover plate to provide cold energy for the freezing chamber; and is

The freezing chamber is limited with a plurality of accommodating spaces, and the freezing air inlet is positioned in a second accommodating space of the freezing chamber from bottom to top;

the thawing device is arranged in the second accommodating space, so that the freezing air duct can provide cold for the thawing device.

5. The side by side combination refrigerator of claim 4 wherein

The device air inlet is located the projection of wind channel cover plate thickness direction is in the freezing air inlet, so that freezing wind channel does thawing apparatus provides cold volume.

6. The side by side combination refrigerator of claim 1 wherein

The freezing door body is provided with a thawing switch for controlling the thawing program to start or stop; and the radio frequency generation module is configured to:

when the unfreezing switch is turned on, the work is started;

and when the defrosting switch is closed, the defrosting switch stops working.

7. The side by side refrigerator of claim 6 wherein said defrosting apparatus further comprises:

and the infrared sensor is arranged on the inner wall of the unfreezing chamber to sense whether the object to be processed is placed in the unfreezing chamber.

8. The side by side refrigerator of claim 7, wherein the side by side refrigerator is configured to:

when the unfreezing switch is turned on, the refrigeration quantity is stopped to be provided for the freezing compartment;

when the object to be processed is taken out of the unfreezing chamber, the original refrigerating program of the side-by-side refrigerator is operated;

and when the time for which the object to be treated is not taken out of the unfreezing cavity after the object to be treated is unfrozen is more than or equal to a preset time threshold, providing cold energy for the freezing chamber.

9. The side by side refrigerator of claim 1, further comprising:

and the detection module is configured to detect an incident wave signal and a reflected wave signal of an electrical connection line connecting the radio frequency generation module and the upper electrode plate, and calculate the change rate according to the voltage and the current of the incident wave signal and the voltage and the current of the reflected wave signal.

10. The side by side refrigerator of claim 1, wherein the radio frequency generation module is configured to:

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

And when the change rate is reduced to be less than or equal to a second rate threshold value, stopping the work.

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