Refrigerator

Abstract

The utility model discloses a refrigerator, and belongs to the technical field of household appliances. The refrigerator comprises a refrigerator body and a refrigerator door, a back plate of the refrigerator body is provided with a power panel and a first resonance circuit, the refrigerator door is provided with a second resonance circuit, a rectifier and a display panel, and the first resonance circuit and the second resonance circuit are the same in frequency; the output end of the power panel is connected with the input end of the first resonant circuit; the first resonant circuit is used for generating an alternating magnetic field based on electric energy provided by the power panel; the output end of the second resonant circuit is connected with the input end of the rectifier, the second resonant circuit is used for generating induced current based on the alternating magnetic field, and the rectifier is used for converting the induced current into direct current; the output end of the rectifier is connected with the power supply end of the display panel, and the rectifier is used for transmitting the direct current to the display panel to supply power to the display panel. Through wireless transmission of energy, the circuit layout of the supply circuit is simplified, and the potential safety hazard of electricity utilization caused by circuit abrasion is avoided.

Description

Technical Field

[0001] The present application relates to the field of smart home appliances, and in particular to a refrigerator. Background Art

[0002] As the degree of intelligence of household appliances increases, more and more refrigerators have screen display functions. At present, the refrigerator door is connected to the refrigerator body by a hinge, the display panel is usually set on the refrigerator door, and the power board is usually set on the refrigerator body. In order to realize power supply to the display panel, the connection line of the power board needs to pass through the hinge between the refrigerator body and the refrigerator door to connect to the display panel.

[0003] In the above method, the opening and closing of the refrigerator door will cause friction between the connecting wire and the hinge. As the refrigerator is used for a longer time, frequent friction will cause the connecting wire to be damaged, and even cause the refrigerator to leak electricity, affecting the user's safety. Utility Model Content

[0004] The present application provides a refrigerator, which can improve the safety of the refrigerator during use. The technical solution is as follows:

[0005] The present application provides a refrigerator, the refrigerator comprising: a refrigerator body and a refrigerator door, the back panel of the refrigerator body having a power supply board and a first resonant circuit, the refrigerator door having a second resonant circuit, a rectifier and a display panel, the first resonant circuit having the same frequency as the second resonant circuit;

[0006] The output end of the power board is connected to the input end of the first resonant circuit, the power board is used to provide electric energy to the first resonant circuit, and the first resonant circuit is used to generate an alternating magnetic field based on the electric energy provided by the power board;

[0007] The output end of the second resonant circuit is connected to the input end of the rectifier, the second resonant circuit is used to generate an induced current based on the alternating magnetic field, and the rectifier is used to convert the induced current into direct current; the output end of the rectifier is connected to the power supply end of the display panel, and is used to transmit the direct current to the display panel to power the display panel.

[0008] Optionally, the first resonant circuit includes a first coil, and the positive and negative poles of the power board are respectively connected to the two ends of the first coil; the second resonant circuit includes a second coil, and the two ends of the second coil are respectively connected to the positive and negative poles of the rectifier;

[0009] The axial directions of the first coil and the second coil are parallel, and the projection of the first coil in the axial direction at least partially overlaps with the projection of the second coil in the axial direction.

[0010] Optionally, the first resonant circuit further includes a first capacitor, which is connected in series between the power board and the first coil, or the first capacitor is connected in parallel at both ends of the first coil, and the first capacitor is used to adjust the frequency of the first resonant circuit.

[0011] Optionally, the second resonant circuit further includes a second capacitor, which is connected in series between the rectifier and the second coil, or the second capacitor is connected in parallel at both ends of the second coil, and the second capacitor is used to adjust the frequency of the second resonant circuit.

[0012] Optionally, the first coil is located on the border of the back plate, and the second coil is located on the door frame of the refrigerator door.

[0013] Optionally, the output current of the power board is alternating current.

[0014] Optionally, the output current of the power board is direct current, and the refrigerator body further has an inverter;

[0015] The inverter is connected in series between the power board and the first resonant circuit, and is used for converting the direct current output by the power board into alternating current, and transmitting the alternating current to the first resonant circuit.

[0016] Optionally, the refrigerator door also has a battery, the charging end of the battery is connected to the output end of the rectifier, the discharging end of the battery is connected to the power end of the display panel, the rectifier is also used to transmit the direct current to the battery to charge the battery, and the battery is used to power the display panel when the second resonant circuit cannot generate an induced current.

[0017] Optionally, the refrigerator body further comprises a main control board and a first wireless communication module, and the refrigerator door further comprises a second wireless communication module;

[0018] The main control board is connected to the first wireless communication module, and the main control board is used to send the target information to be displayed to the second wireless communication module through the first wireless communication module, and the second wireless communication module is used to send the target information to the display panel for display.

[0019] Optionally, the display panel has an interactive module, which is used to respond to user control instructions and send the control instructions to the second wireless communication module, and the second wireless communication module is also used to send the control instructions to the main control board through the first wireless communication module so that the main control board executes the control instructions.

[0020] The technical solution provided by this application can at least bring the following beneficial effects:

[0021] The first resonant circuit is powered by a power board, so that the first resonant circuit can generate an alternating magnetic field to convert electrical energy into magnetic energy at the power supply end for energy transmission. The second resonant circuit generates an induced current based on the alternating magnetic field to convert magnetic energy into electrical energy at the power consumption end, thereby realizing wireless energy transmission, simplifying the line layout of the supply circuit, and avoiding electrical safety hazards caused by line wear, thereby improving user safety. In addition, since the frequency of the first resonant circuit is the same as that of the second resonant circuit, based on the principle of magnetic field resonance, the distance of wireless charging can be greatly increased to improve the energy transmission efficiency during the charging process and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 is a structural schematic diagram of a refrigerator provided in an embodiment of the present application;

[0024] Figure 2 is a structural schematic diagram of another refrigerator provided in an embodiment of the present application;

[0025] Figure 3 is a structural schematic diagram of another refrigerator provided in an embodiment of the present application;

[0026] Figure 4 It is a schematic diagram of a circuit principle provided by an embodiment of the present application;

[0027] Figure 5 is a structural schematic diagram of another refrigerator provided in an embodiment of the present application;

[0028] Figure 6 It is another circuit principle schematic diagram provided by an embodiment of the present application;

[0029] Figure 7 It is another circuit principle schematic diagram provided by an embodiment of the present application;

[0030] Figure 8 It is another circuit principle schematic diagram provided by an embodiment of the present application;

[0031] Fig. 9 is a structural schematic diagram of another refrigerator provided in an embodiment of the present application;

[0032] Fig.10is a structural schematic diagram of another refrigerator provided in an embodiment of the present application;

[0033] Fig.11 is a structural schematic diagram of another refrigerator provided in an embodiment of the present application;

[0034] Fig.12 It is a structural schematic diagram of another refrigerator provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0036] Please refer to Figure 1 , Figure 1 1 is a schematic diagram of a refrigerator structure according to an exemplary embodiment. The refrigerator comprises a refrigerator body 1 and a refrigerator door 2. The back panel of the refrigerator body 1 has a power board 101 and a first resonant circuit 102. The refrigerator door 2 has a second resonant circuit 201, a rectifier 202 and a display panel 203. The first resonant circuit 102 has the same frequency as the second resonant circuit 201.

[0037] The output end of the power board 101 is connected to the input end of the first resonant circuit 102, the power board 101 is used to provide electric energy to the first resonant circuit 102, and the first resonant circuit 102 is used to generate an alternating magnetic field based on the electric energy provided by the power board 101;

[0038] The output end of the second resonant circuit 201 is connected to the input end of the rectifier 202, the second resonant circuit 201 is used to generate an induced current based on the alternating magnetic field, and the rectifier 202 is used to convert the induced current into direct current; the output end of the rectifier 202 is connected to the power supply end of the display panel 203, and is used to transmit the direct current to the display panel 203 to power the display panel 203.

[0039] It should be noted that the frequency of the first resonant circuit and the second resonant circuit refers to the resonant frequency (also called the resonance frequency) in the resonant circuit. Based on the resonance principle, when the frequencies of the two resonant circuits are the same, the efficiency of energy transmission can be significantly enhanced. The first resonant circuit converts electrical energy into magnetic energy and transmits the magnetic energy to the second resonant circuit through an alternating magnetic field, thereby achieving energy transmission. When the second resonant magnetic field is within the alternating magnetic field, energy can be captured from the changing magnetic field, and an electromotive force is generated, generating an induced current, thereby achieving energy reception.

[0040] In addition, since the induced current generated by the second resonant circuit based on the alternating magnetic field is alternating current, and the current used by electrical equipment such as display panels is usually direct current, a rectifier is also required at the output end of the second resonant circuit to convert the alternating current generated by the second resonant circuit into direct current so that the display panel can operate normally based on direct current.

[0041] In some embodiments, if the display panel can achieve normal operation based on alternating current, the above-mentioned rectifier can also be omitted, that is, the output end of the second resonant circuit can also be directly connected to the power end of the display panel.

[0042] In some embodiments, if the coupling degree between the first resonant circuit and the second resonant circuit is low, in order to further increase the energy transmission distance, a boost converter can be provided at the power supply end (i.e., the power board side) to increase the working voltage of the first resonant circuit end through the boost converter. The boost converter can be connected in series between the power board and the first resonant circuit and connected to the input end of the first resonant circuit to increase the intensity of the alternating magnetic field by increasing the voltage, thereby compensating for the low coupling degree between the first resonant circuit and the second resonant circuit and improving the energy transmission distance.

[0043] In some embodiments, in order to eliminate the ripple of the rectifier output, a filter can be added to the output end of the rectifier, and the connection mode of the filter and the rectifier can be determined based on the filtering principle of the filter. For example, the filter can be a filter capacitor. Based on the capacitor filtering principle, one end of the filter capacitor can be connected to the positive electrode of the rectifier, and the other end can be connected to the negative electrode of the rectifier. It is used to store electrical energy when the DC voltage output by the rectifier rises to reduce the voltage in the circuit, and release electrical energy when the DC voltage output by the rectifier drops to increase the voltage in the circuit, thereby providing a more stable DC voltage for electrical equipment such as display panels.

[0044] In some embodiments, Figure 2 As shown, the first resonant circuit 102 includes a first coil 1021, and the positive and negative poles of the power board 101 are respectively connected to the two ends of the first coil 1021; the second resonant circuit 201 includes a second coil 2011, and the two ends of the second coil 2011 are respectively connected to the positive and negative poles of the rectifier 202; wherein, the first coil 1021 is parallel to the axial direction of the second coil 2011, and the axial projection of the first coil 1021 at least partially overlaps with the axial projection of the second coil 2011.

[0045] Based on the principle of electromagnetic induction, when the first coil is energized, due to the existence of current, based on the principle of electromagnetic induction, a magnetic field will be generated around the first coil, and when the other coil, that is, the second coil, is in the magnetic field, based on the principle of electromagnetic induction, when the magnetic flux passes through the second coil, an induced electromotive force will be generated in the second coil. If the second coil forms a closed loop, current will flow in the closed loop (that is, induced current).

[0046] It should be noted that when the first coil and the second coil are axially parallel, since the axially parallel coils can achieve higher magnetic field coupling within a relatively short distance, energy transmission can be more effectively achieved. If the axes of the two coils are not parallel, the energy transmission efficiency will also be affected due to the reduced coupling effect, resulting in energy loss and reduced transmission distance. In other words, when the two coils are axially parallel, the degree of magnetic flux coupling between the coils can be maximized, thereby improving the energy transmission efficiency.

[0047] In addition, in some specific scenarios, there is no need to strictly limit the axial parallelism of the two coils. For example, in a multi-coil system, since each coil can be coupled with other nearby coils, by optimizing the layout design of the multi-coil system, wireless energy transmission can be achieved even if the individual coils are not completely aligned (the axial projections of the two coils overlap) or axially parallel.

[0048] In some embodiments, since the refrigerator door is a movable door, the layout of the first resonant circuit and the second resonant circuit can be arranged so that when the refrigerator door is in a certain position (such as the refrigerator door is closed), the first coil and the second coil are in a state of axial parallelism and their axial projections partially overlap.

[0049] In some embodiments, in order to maximize the energy transmission efficiency between the coils, the first coil and the second coil may be arranged axially parallel and aligned (ie, their axial projections completely overlap).

[0050] In some embodiments, in combination Figure 3 , Figure 4 The first resonant circuit 102 also includes a first capacitor 1022, which is connected in series between the power board 101 and the first coil 1021, or the first capacitor 1022 is connected in parallel at both ends of the first coil 1021, and the first capacitor 1022 is used to adjust the frequency of the first resonant circuit 102.

[0051] It should be noted that, assuming that the influence of the resistance in the resonant circuit on the circuit frequency can be ignored, the frequency of the first resonant circuit can be determined based on the following formula 1:

[0052]

[0053] Wherein, f is the circuit frequency, L is the inductance value in the resonant circuit (ie, the inductance value of the first coil), and C is the capacitance value in the resonant circuit (ie, the capacitance value of the first capacitor).

[0054] In actual usage scenarios, considering that resistances such as the internal resistance of the coil in the circuit will cause slight changes in the circuit frequency, in order to more accurately determine the circuit frequency, the circuit frequency can be measured based on more complex formulas or directly through experiments.

[0055] In some embodiments, the target frequency can be set based on relevant industry standards or usage scenario requirements, and the capacitance value required to achieve the target frequency in the first resonant circuit can be determined based on the inductance value of the first coil in the first resonant circuit and the target frequency, and then the capacitor that meets the capacitance value is determined as the first capacitor.

[0056] In some embodiments, if the capacitance in the first resonant circuit has been determined, the inductance value required to achieve the target frequency in the first resonant circuit can be determined based on the capacitance value in the first resonant circuit and the target frequency, and then the coil meeting the inductance value can be determined as the first coil.

[0057] The inductance of a coil can be determined based on the manufacturer's instructions, the physical size of the coil, the number of turns, the wire diameter and the core material, or directly based on an LCR (Inductance, Capacitance, Resistance) bridge.

[0058] The connection method between the first capacitor and the first coil can be determined in combination with the specific usage. Figure 4 , Figure 4 Part (a) illustrates a circuit schematic diagram in which a first capacitor is connected in series between a power supply board and a first coil. In this connection mode, based on the series circuit principle, the current phases of the first capacitor and the first coil are the same. When the capacitor and the coil resonate, the impedance of the circuit reaches a minimum value, which can provide higher power transmission efficiency. However, due to the small circuit impedance, it is necessary to ensure that the frequency of the power supply is completely matched with the frequency of the resonant circuit, and the anti-interference ability is weak. Figure 4 Part (b) describes by way of example a circuit schematic diagram in which a first capacitor is connected in parallel at both ends of a first coil. In this connection method, based on the principle of parallel circuits, the voltage phases of the first capacitor and the first coil are the same. When the capacitor resonates with the coil, the impedance of the circuit reaches a maximum value, and the power transmission efficiency is low. However, due to the large circuit impedance, a certain deviation is allowed between the frequency of the power supply and the frequency of the resonant circuit, and the anti-interference ability is strong.

[0059] In some embodiments, the resonant circuit may further include a resistor to dissipate part of the energy in the resonant circuit through the resistor, thereby making the resonant peak wider and flatter, thereby increasing the tolerance of frequency selection and improving the stability of circuit resonance.

[0060] The arrangement of the resistor in the resonant circuit can be designed differently in combination with different connection methods of the resonant circuit. For example, if the resonant circuit is a series resonant circuit, such as Figure 4 If the resonant circuit is a parallel resonant circuit, such as Figure 4 In the resonant circuit shown in part (b), the resistor can be connected in series with the coil, and the capacitor is connected in parallel across the series circuit consisting of the resistor and the coil.

[0061] In some embodiments, in combination Figure 5 , Figure 6 The second resonant circuit 201 also includes a second capacitor 2012, which is connected in series between the rectifier 202 and the second coil 2011, or the second capacitor 2012 is connected in parallel at both ends of the second coil 2011, and the second capacitor 2012 is used to adjust the frequency of the second resonant circuit 201.

[0062] In some embodiments, reference may be made to the above Figure 3 As described above, based on the target frequency and the above formula 1, a second capacitor (and / or a second coil) is selected to adjust the frequency of the second resonant circuit. The specific frequency adjustment logic is the same and will not be repeated here.

[0063] The connection method between the second capacitor and the second coil can be determined based on the specific usage. Figure 6 , Figure 6 Part (a) illustrates a circuit schematic diagram in which a second capacitor is connected in series between a rectifier and a second coil. In this connection mode, based on the principle of a series circuit, the current phases of the second capacitor and the second coil are the same. When the capacitor and the coil resonate, the impedance of the circuit reaches a minimum value, which can provide higher power transmission efficiency. However, due to the small circuit impedance, it is necessary to ensure that the frequency of the power supply is completely matched with the frequency of the resonant circuit, and the anti-interference ability is weak. Figure 6 Part (b) describes by way of example a circuit schematic diagram in which a second capacitor is connected in parallel at both ends of a second coil. In this connection method, based on the principle of parallel circuits, the voltage phases of the second capacitor and the second coil are the same. When the capacitor resonates with the coil, the impedance of the circuit reaches a maximum value, and the power transmission efficiency is low. However, due to the large circuit impedance, there may be a certain deviation between the frequency of the power supply and the frequency of the resonant circuit, and the anti-interference ability is strong.

[0064] In some embodiments, when the first resonant circuit includes a first coil and a first capacitor, and the second resonant circuit includes a second coil and a second capacitor, the connection method of the first coil and the first capacitor in the first resonant circuit and the connection method of the second coil and the second capacitor in the second resonant circuit can be flexibly selected based on actual usage requirements.

[0065] For example, the first capacitor of the first resonant circuit can be connected in series between the power board and the first coil (eg, Figure 4 The second capacitor of the second resonant circuit can be connected in parallel at both ends of the second coil (such as Figure 6 ) as shown in part (b) of the figure, so that Figure 7 The circuit schematic is shown.

[0066] In some embodiments, there may be multiple coils and / or capacitors in the first resonant circuit and the second resonant circuit, which may be determined based on actual usage requirements. For example, in order to increase the distance of wireless charging or enhance the stability of the resonant circuit, multiple coils may be provided in the first resonant circuit to improve the efficiency of magnetic resonance coupling, so as to improve the energy transmission efficiency; or in order to improve the stability of the resonant circuit, multiple coils and capacitors may be provided in the resonant circuit, so that in the event of failure of a single coil or capacitor, the remaining coils and capacitors may provide backup. For example, in order to realize simultaneous charging of multiple devices, multiple coils (and capacitors) may also be provided to meet different charging needs of users.

[0067] In some embodiments, the first coil 1021 is located on the frame of the back plate, and the second coil 2011 is located on the door frame of the refrigerator door 2.

[0068] In some embodiments, the output current of the power board 101 is alternating current.

[0069] It should be noted that, since the output current of the power board is alternating current, the direction of the current will change over time. Therefore, in some embodiments, if the first resonant circuit includes a first capacitor and a first coil, and the first capacitor and the first coil are connected in series, Figure 4 In part (a), the direction of the current between the first capacitor and the first coil may be different at different times.

[0070] For example, Figure 8 As shown, the first capacitor can be connected in series between the first coil and the negative output terminal of the power board. At this time, in the positive half cycle of the voltage, Figure 8 As shown in part (a), the direction of the current is from the first coil to the first capacitor; in the negative half cycle of the voltage, as shown in Figure 8 As shown in part (b), the direction of the current is from the first capacitor to the first coil.

[0071] In some embodiments, Fig. 9 As shown, the output current of the power board 101 is direct current, and the refrigerator body 1 also has an inverter 103; the inverter 103 is connected in series between the power board 101 and the first resonant circuit 102, and the inverter 103 is used to convert the direct current output by the power board 101 into alternating current, and transmit the alternating current to the first resonant circuit 102.

[0072] It should be noted that, since the first resonant circuit needs to convert electrical energy into magnetic energy and transmit the energy to the second resonant circuit, and based on the principle of electromagnetic induction, it is known that only when the current in one coil changes, an induced electromotive force will be generated in the other coil. That is, only when the magnetic field changes over time (i.e., an alternating magnetic field) can the second resonant circuit be able to generate an induced current based on the changing magnetic field, so it is necessary to ensure that the magnetic field is an alternating magnetic field, and the current transmitted to the first resonant circuit is alternating current. Therefore, if the current output by the power board is direct current, it is necessary to convert the direct current into alternating current through an inverter, and then transmit the alternating current to the first resonant circuit, so that the first resonant circuit can generate an alternating magnetic field based on the alternating current.

[0073] In some embodiments, Fig.10 As shown, the refrigerator door 2 also has a battery 204, the charging end of the battery 204 is connected to the output end of the rectifier 202, and the discharging end of the battery 204 is connected to the power end of the display panel 203. The rectifier 202 is also used to transmit the direct current to the battery 204 to charge the battery 204. The battery 204 is used to power the display panel 203 when the second resonant circuit 201 cannot generate an induced current.

[0074] It is understandable that, since the battery needs to realize the charging function, in some embodiments, the battery needs to be a rechargeable battery. In other embodiments, in order to simplify the circuit layout and improve the convenience of the battery, the battery can also be a disposable battery, which can power the display panel when the second resonant circuit cannot generate an induced current. After the battery is discharged, the battery can be replaced. At this time, since the battery is a disposable battery, there is no need to establish a connection between the rectifier and the power supply, and it is only necessary to ensure that the discharge end of the battery is connected to the power supply end of the display panel.

[0075] In some embodiments, Fig.11As shown, the refrigerator body 1 also has a main control board 104 and a first wireless communication module 105, and the refrigerator door 2 also has a second wireless communication module 205; the main control board 104 is connected to the first wireless communication module 105, and the main control board 104 is used to send the target information to be displayed to the second wireless communication module 205 through the first wireless communication module 105, and the second wireless communication module 205 is used to send the target information to the display panel 203 for display.

[0076] In some embodiments, the target information can be determined in combination with actual usage requirements. For example, the target information can include the current operating condition information of the refrigerator, such as the temperature and humidity in the refrigerator, and can also include Internet information such as the current time and weather.

[0077] In some embodiments, the wireless communication module may refer to a wireless communication module such as a Wi-Fi (wireless fidelity) module or a BT (Classic Bluetooth) module, so as to realize wireless transmission of information.

[0078] In some embodiments, Fig.11 As shown, the output end of the power board can be connected to the main control board and the first wireless communication module respectively to provide power to the main control board and the first wireless communication module, so that the main control board and the first wireless communication module can work normally; similarly, the output end of the rectifier can be connected to the second wireless communication module to provide power to the second wireless communication module, so that the second wireless communication module can work normally.

[0079] In some embodiments, in order to simplify the circuit layout, the first wireless communication module can be integrated on the main control board. Similarly, the second wireless communication module can also be integrated on the display panel.

[0080] In some embodiments, Fig.12 As shown, the display panel 203 has an interactive module 2031, which is used to respond to the user's control instructions and send the control instructions to the second wireless communication module 205. The second wireless communication module 205 is also used to send the control instructions to the main control board 104 through the first wireless communication module 105, so that the main control board 104 executes the control instructions.

[0081] In some embodiments, the specific form of the interaction module can be determined based on actual usage requirements. For example, the user's control instructions can be in multiple forms such as voice or gesture instructions. Taking the reception of control instructions in the form of voice as an example, the interaction module can include a microphone to receive the control instructions in the form of voice sent by the user through the microphone.

[0082] In some embodiments, the user can also send specific control instructions based on the interactive module to modify the type of target information displayed on the display panel through the control instructions, such as causing the temperature of the refrigerator to no longer be displayed on the display panel based on the control instructions.

[0083] In the embodiment of the present application, in order to reduce the complexity of the circuit layout, the first resonant circuit and the second resonant circuit with the same frequency are set to realize energy transmission based on magnetic field resonance, provide wireless charging for the display panel, and improve the energy transmission efficiency in the wireless charging process by setting the first coil and the second coil that are axially parallel and partially overlapped in projection, and respectively adjust the frequencies of the first resonant circuit and the second resonant circuit by setting the first capacitor and the second capacitor. Since energy needs to be transmitted through an alternating magnetic field, when the output current of the power board is direct current, an inverter is set to convert direct current into alternating current and then transmit it to the first resonant circuit to further enrich the use scenarios and improve the flexibility of power supply. In addition, by setting the first coil on the frame of the back plate of the refrigerator body and the second coil on the door frame of the refrigerator door, the circuit layout of the power supply end and the power consumption end is further simplified. Considering that in some use scenarios, due to the change in the relative position of the first resonant circuit and the second resonant circuit, or the fluctuation of the circuit signal, the second resonant circuit may not generate an induced current, and a battery is added as a backup power supply at the power consumption end (i.e., the display panel end) to improve the stability of the power supply. In order to further improve the intelligence of the refrigerator, a main control board and a first wireless communication module are set on the refrigerator body, and a second wireless communication module is set on the refrigerator door. The transmission of target information and control instructions is realized through the first wireless communication module and the second wireless communication module.

[0084] It should be understood that the "at least one" mentioned herein refers to one or more, and "multiple" refers to two or more. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second" and the like are used to distinguish the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not limit them to be necessarily different.

[0085] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.) and signals involved in the embodiments of the present application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data need to comply with relevant laws, regulations and standards of relevant countries and regions.

[0086] The above-mentioned embodiments are provided for the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A refrigerator, characterized in that: The refrigerator comprises: a refrigerator body and a refrigerator door, wherein the back plate of the refrigerator body has a power supply board and a first resonant circuit, and the refrigerator door has a second resonant circuit, a rectifier and a display panel, and the first resonant circuit has the same frequency as the second resonant circuit; The output end of the power board is connected to the input end of the first resonant circuit, the power board is used to provide electric energy to the first resonant circuit, and the first resonant circuit is used to generate an alternating magnetic field based on the electric energy provided by the power board; The output end of the second resonant circuit is connected to the input end of the rectifier, the second resonant circuit is used to generate an induced current based on the alternating magnetic field, and the rectifier is used to convert the induced current into direct current; the output end of the rectifier is connected to the power supply end of the display panel, and is used to transmit the direct current to the display panel to power the display panel.

2. The refrigerator according to claim 1, characterized in that: The first resonant circuit includes a first coil, and the positive and negative electrodes of the power board are respectively connected to the two ends of the first coil; the second resonant circuit includes a second coil, and the two ends of the second coil are respectively connected to the positive and negative electrodes of the rectifier; The axial directions of the first coil and the second coil are parallel, and the projection of the first coil in the axial direction at least partially overlaps with the projection of the second coil in the axial direction.

3. The refrigerator according to claim 2, characterized in that: The first resonant circuit also includes a first capacitor, which is connected in series between the power board and the first coil, or the first capacitor is connected in parallel at both ends of the first coil, and the first capacitor is used to adjust the frequency of the first resonant circuit.

4. The refrigerator according to claim 2 or 3, characterized in that: The second resonant circuit also includes a second capacitor, which is connected in series between the rectifier and the second coil, or the second capacitor is connected in parallel at both ends of the second coil, and the second capacitor is used to adjust the frequency of the second resonant circuit.

5. The refrigerator according to claim 2, characterized in that: The first coil is located on the frame of the back plate, and the second coil is located on the door frame of the refrigerator door.

6. The refrigerator according to claim 1, characterized in that: The output current of the power board is alternating current.

7. The refrigerator according to claim 1, characterized in that: The output current of the power board is direct current, and the refrigerator body also has an inverter; The inverter is connected in series between the power board and the first resonant circuit, and is used for converting the direct current output by the power board into alternating current, and transmitting the alternating current to the first resonant circuit.

8. The refrigerator according to any one of claims 1 to 3, characterized in that: The refrigerator door also has a battery, the charging end of the battery is connected to the output end of the rectifier, and the discharging end of the battery is connected to the power supply end of the display panel. The rectifier is also used to transmit the direct current to the battery to charge the battery. The battery is used to power the display panel when the second resonant circuit cannot generate an induced current.

9. The refrigerator according to any one of claims 1 to 3, characterized in that: The refrigerator body also has a main control board and a first wireless communication module, and the refrigerator door also has a second wireless communication module; The main control board is connected to the first wireless communication module, and the main control board is used to send the target information to be displayed to the second wireless communication module through the first wireless communication module, and the second wireless communication module is used to send the target information to the display panel for display.

10. The refrigerator according to claim 9, characterized in that: The display panel has an interactive module, which is used to respond to the user's control instructions and send the control instructions to the second wireless communication module. The second wireless communication module is also used to send the control instructions to the main control board through the first wireless communication module so that the main control board executes the control instructions.

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