Wireless power supply device of display screen and cooking equipment

Abstract

The embodiment of the utility model discloses a wireless power supply device of a display screen and cooking equipment. The wireless power supply device comprises a transmitting circuit module, a transmission circuit module, a receiving circuit module and an auxiliary power supply; the transmitting circuit module and the receiving circuit module are electrically connected with the transmission circuit module respectively, the transmitting circuit module is electrically connected with an external power supply, and the receiving circuit module and the auxiliary power supply are electrically connected with the display screen respectively; the transmission circuit module comprises a sending electromagnetic induction coil and a receiving electromagnetic induction coil which are wirelessly connected; the transmitting electromagnetic induction coil is electrically connected with the transmitting circuit module, and the receiving electromagnetic induction coil is electrically connected with the receiving circuit module. According to the embodiment of the utility model, the induction coil is additionally arranged in the power supply circuit, so that connection through a long wire rod is not needed, unstable power supply caused by damage of the wire rod is avoided, the dependence of the power supply state on the wire rod state is reduced, and the power supply stability is improved; and the display stability and continuity of the display screen are further ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless power supply for display screens, and in particular to a wireless power supply device for display screens and cooking equipment. Background Art

[0002] The display screens on existing steam ovens and similar home appliances mostly use wired power supply devices. The display screens on common home appliances are placed close to the power board or connected to a very long data cable. In order to ensure the integrity of the entire machine, the wires need to be hidden inside, and there are high requirements for the arrangement of internal connections. The wired power supply method is highly dependent on the wires. If the wires are mechanically damaged, it is easy to cause communication interruption. The longer the wires, the more likely they are to be damaged. This results in the power supply and communication distance between the display screen and the power board being limited to a smaller range. The existing wired power supply leads to large power supply and communication restrictions between the display screen and the power board, and the wiring is complex and cumbersome.

[0003] Therefore, there is an urgent need for a wireless power supply device that can break through the limitations of power supply and communication distance and has simple and convenient wiring. Utility Model Content

[0004] The technical problem to be solved by this application is to break through the limitations on power supply and communication distance in the power supply device and reduce the complexity of the power supply device wiring. To solve this technical problem, the technical solution provided by this application is as follows:

[0005] On the one hand, the present application provides a wireless power supply device for a display screen, the wireless power supply device comprising a sending circuit module, a transmission circuit module, a receiving circuit module and an auxiliary power supply; the sending circuit module and the receiving circuit module are electrically connected to the transmission circuit module respectively, the sending circuit module is electrically connected to an external power supply, and the receiving circuit module and the auxiliary power supply are electrically connected to the display screen respectively;

[0006] The transmission circuit module includes a wirelessly connected transmitting electromagnetic induction coil and a receiving electromagnetic induction coil;

[0007] The transmitting electromagnetic induction coil is electrically connected to the transmitting circuit module, and the receiving electromagnetic induction coil is electrically connected to the receiving circuit module.

[0008] In some possible implementations, the auxiliary power supply includes an auxiliary power switch and a lithium battery.

[0009] In some possible implementations, the auxiliary power switch is disposed in the receiving circuit module.

[0010] In some possible implementations, one end of the lithium battery is connected to the receiving circuit module through the auxiliary power switch, and the other end is electrically connected to the display screen.

[0011] In some possible implementations, the wireless power supply device further includes a power board, and the sending circuit module is electrically connected to the external power supply through the power board.

[0012] In some possible embodiments, the wireless power supply device is also provided with a first wireless transceiver module for power board communication and a second wireless transceiver module for display screen communication, the first wireless transceiver module and the second wireless transceiver module are radio connected, the first wireless transceiver module is electrically connected to the power board, and the second wireless transceiver module is electrically connected to the display screen.

[0013] In some possible implementations, the transmitting electromagnetic induction coil and the receiving electromagnetic induction coil are separated by a preset distance, and the preset distance is less than or equal to 7 mm.

[0014] On the other hand, the present application also provides a cooking device, which includes a door structure, a box structure, a display screen and the wireless power supply device, the door structure is rotatably connected to the box structure, the display screen is arranged on the door structure, and the wireless power supply device is electrically connected to the display screen.

[0015] In some possible embodiments, the wireless power supply device also includes a power board electrically connected to an external power supply, the power board is arranged on the box structure, the door structure covers the outer surface of the box structure, the transmitting circuit module and the transmitting electromagnetic induction coil are arranged at preset positions of the box structure, and the receiving electromagnetic induction coil and the receiving circuit module are arranged on the door structure.

[0016] In some possible implementations, the preset position is a position between the power board and a top surface of an internal cavity, and the internal cavity is an internal cavity of the box structure.

[0017] By adopting the above technical scheme, the wireless power supply device and cooking equipment for the display screen provided by the present application have the following beneficial effects: by adding an induction coil to the power supply line instead of wired power supply, there is no need to connect the power board and the display screen through a long wire, thus eliminating the need for excessively long wires, avoiding unstable power supply caused by damage to the wires, and reducing the dependence of the power supply state on the wire state, thereby improving the stability of the power supply. By setting an auxiliary power supply to provide auxiliary power to the display screen, the display screen can continue to be powered by the auxiliary power supply when the induction coils are more than a preset distance apart, thereby ensuring the stability and continuity of the power supply to the display screen. The operator can continue to observe the content on the display screen, ensuring the continuity and convenience of the operator reading the display screen information. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the connection relationship of a wireless power supply device for a display screen provided by an embodiment of the utility model;

[0020] Figure 2 It is a front schematic diagram of a door structure of a cooking device provided by an embodiment of the utility model;

[0021] Figure 3 It is a front schematic diagram of a box structure of a cooking device provided by an embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the power supply principle of a wireless power supply device provided by an embodiment of the utility model;

[0023] Figure 5 It is a schematic diagram of the appearance of a cooking device provided by an embodiment of the utility model;

[0024] The following is a supplementary description of the attached drawings:

[0025] 1-display screen; 11-second wireless transceiver module; 2-transmitting circuit module; 3-transmission circuit module, 31-transmitting electromagnetic induction coil; 32-receiving electromagnetic induction coil; 4-receiving circuit module; 5-auxiliary power supply; 51-auxiliary power switch; 52-lithium battery; 6-power board; 61-first wireless transceiver module; 7-box structure; 8-door structure; 81-handle. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present application. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may include one or more of the features explicitly or implicitly. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0028] When a numerical range is disclosed herein, the above range is deemed to be continuous and includes the minimum and maximum values ​​of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise indicated, all ranges disclosed herein should be understood to include any and all sub-ranges included therein. For example, a specified range from "1 to 10" should be deemed to include any and all sub-ranges between a minimum of 1 and a maximum of 10. Exemplary sub-ranges of ranges 1 to 10 include, but are not limited to, 1 to 6.1, 3.5 to 7.8, 5.5 to 10, etc.

[0029] With the development of technologies related to smart appliances, most household appliances such as cooking equipment have feature-rich display screens. In order to achieve human-computer interaction and control of electrical appliances through the display screen, the display screen needs to be powered and communication functions need to be set. Currently, wired power supply is mostly used for power supply and communication of the display screen. However, wired power supply has defects such as complex wiring and excessively long wires, resulting in high production and maintenance costs. The stability of power supply is greatly affected by the state of the wires. If the wires are damaged, the power supply is affected. Long wires are more likely to be damaged, which requires the length of the wires to be controlled within a certain range, which in turn limits the power supply distance. Therefore, in order to solve the above problems, the present application provides a wireless power supply device for a display screen and a cooking device.

[0030] See also Figure 1 , Figure 2 , illustratively, Figure 1A wireless power supply device for a display screen 1 of a cooking device is shown. The various components in the wireless power supply device are connected by wire or wirelessly. In particular, the transmission circuit module 3 is wirelessly connected inside. A power board 6, a sending circuit module 2 and a sending electromagnetic induction coil 31 are provided on a box structure 7. The power board 6 is connected to the sending circuit module 2 by wire, and the sending circuit is connected to the sending electromagnetic induction coil 31 by wire. A receiving electromagnetic induction coil 32, a receiving circuit module 4, an auxiliary power supply and a display screen 1 are provided on a door structure 8. The receiving electromagnetic induction coil 32 is connected to the sending electromagnetic induction coil 31 by radio, the receiving electromagnetic induction coil 32 is connected to the receiving circuit module 4 by wire, and the receiving circuit module 4 and the display screen 1 are connected by wire.

[0031] On the one hand, the present application provides a wireless power supply device for a display screen 1, the wireless power supply device comprising a sending circuit module 2, a transmission circuit module 3, a receiving circuit module 4 and an auxiliary power supply; the sending circuit module 2 and the receiving circuit module 4 are electrically connected to the transmission circuit module 3, respectively, the sending circuit module 2 is electrically connected to an external power supply, and the receiving circuit module 4 and the auxiliary power supply 5 are electrically connected to the display screen 1, respectively;

[0032] The transmission circuit module 3 includes a wirelessly connected transmitting electromagnetic induction coil 31 and a receiving electromagnetic induction coil 32;

[0033] The transmitting electromagnetic induction coil 31 is electrically connected to the transmitting circuit module 2 , and the receiving electromagnetic induction coil 32 is electrically connected to the receiving circuit module 4 .

[0034] Optionally, the transmission circuit module 3 generates an induced current when the induction coil is energized to complete wireless power supply, and the relevant electromagnetic induction principle is not described in detail. Since the transmission of the magnetic field energy of the coupling coil is limited by distance, the transmission efficiency drops sharply when the distance exceeds the preset distance. When the cooking device is used, the door structure 8 needs to be opened, and the receiving electromagnetic induction coil 32 set on the door structure 8 will rotate away from the box as the door structure 8 rotates. The distance between the receiving electromagnetic induction coil 32 and the sending electromagnetic induction coil 31 exceeds the preset distance, resulting in power supply interruption. Therefore, an auxiliary power supply is set to power the display screen 1 with an auxiliary power supply when the induction coil cannot supply power.

[0035] Furthermore, according to the different distances between the induction coils in the transmission circuit module 3, the technical solution of the present application provides two power supply solutions to ensure the continuity of power supply to the display screen 1. The first is to power the display screen 1 through the sending circuit module 2, the transmission circuit module 3, and the receiving circuit module 4 when the distance between the induction coils is within the preset distance, wherein the sending circuit module 2 is electrically connected to the external power supply, and the current is transmitted to the receiving circuit module 4 through the transmission circuit module 3, and the receiving circuit module 4 is electrically connected to the display screen 1 to deliver the current to the display screen 1. Since the sending circuit module 2 and the transmission circuit module 3 are respectively connected by radio, the power supply can be completed without using physical wires. The second is to power the display screen 1 through an auxiliary power supply when the distance between the induction coils is too far, making the first solution impossible to implement.

[0036] Correspondingly, there are two connection paths between the display screen 1 and the receiving circuit module 4. The first is a wired connection between the receiving circuit module 4 and the display screen 1, and the second is a connection to the lithium battery 52 through a farad capacitor switch, and then connected to the display screen 1 through the lithium battery 52. ​​Preferably, the preset distance can be the maximum distance between the induction coils when the induction coils can normally generate current based on electromagnetic induction and complete power supply. The distance between the induction coils can be the preset distance or less than the preset distance.

[0037] The embodiment of the utility model adds an induction coil to the power supply circuit instead of wired power supply, so that there is no need to connect the power board and the display screen through a long wire, which saves the excessively long wire, avoids unstable power supply caused by damaged wire, reduces the dependence of the power supply state on the wire state, and thus improves the stability of power supply. By setting an auxiliary power supply to assist in powering the display screen, the display screen can continue to be powered by the auxiliary power supply when the induction coils are more than a preset distance apart, thereby ensuring the stability and continuity of the power supply to the display screen. The operator can continue to observe the content on the display screen, ensuring the continuity and convenience of the operator reading the information on the display screen.

[0038] In some possible embodiments, the auxiliary power supply 5 includes an auxiliary power switch 51 and a lithium battery 52 .

[0039] Furthermore, the auxiliary power switch 51 is used to control the discharge of the lithium battery 52, and the lithium battery 52 is used to power the display screen 1 when the induction coils are separated by more than a preset distance. Optionally, the auxiliary power switch 51 can be a farad capacitor or a transistor.

[0040] The embodiment of the utility model is provided with an auxiliary power switch and a lithium battery. When a power supply failure occurs in the external power supply, or when the distance of the induction coil is insufficient to connect the receiving circuit module and the sending circuit module, the auxiliary power switch can control the lithium battery to supply power to the display screen, thereby ensuring the continuity and stability of the power supply to the display screen, avoiding power failure of the display screen due to power failure of the external power supply, and improving the anti-interference ability of the power supply of the display screen to external interference.

[0041] In some possible embodiments, the auxiliary power switch 51 is disposed in the receiving circuit module 4 .

[0042] Optionally, the auxiliary power switch 51 is arranged in the receiving circuit module 4 to receive signals according to the opening and closing of the cooking device door structure 8 so as to control the lithium battery 52 to supply power to the display screen 1 .

[0043] In some possible embodiments, one end of the lithium battery 52 is connected to the receiving circuit module 4 through the auxiliary power switch 51 , and the other end is electrically connected to the display screen 1 .

[0044] Optionally, one end of the auxiliary power switch 51 is set in the receiving circuit module 4, and the other end is connected to the lithium battery 52. ​​When the distance between the transmitting electromagnetic induction coil 31 and the receiving electromagnetic induction coil 32 does not exceed the preset distance, the auxiliary power switch 51 maintains a state of not triggering the discharge of the lithium battery 52, and part of the current obtained by the receiving circuit module 4 is used to power the display screen 1, and part of it is used to charge the lithium battery 52; when the distance between the induction coils exceeds the preset distance, the auxiliary power switch 51 is switched to a state of triggering the discharge of the lithium battery 52, so that the lithium battery 52 powers the display screen 1.

[0045] The embodiment of the utility model sets an auxiliary power switch in the receiving circuit module. When the connection between the receiving circuit module and the transmitting circuit module is disconnected, a signal is sent to the auxiliary power switch through the wireless communication module, so that the auxiliary power switch turns on the connected lithium battery to power the display screen, thereby maintaining the stability of the wireless power supply.

[0046] In some possible embodiments, the wireless power supply device further includes a power board 6 , and the sending circuit module 2 is electrically connected to the external power supply via the power board 6 .

[0047] The embodiment of the utility model is capable of delivering current to the sending circuit module by setting a power board electrically connected to an external power supply, thereby wirelessly transmitting current to the receiving circuit module through the transmission circuit module, powering the display screen and charging the lithium battery at the same time, thereby enriching the number of charging paths for the display screen.

[0048] See also Figure 2 , Figure 3In some possible embodiments, the wireless power supply device is also provided with a first wireless transceiver module 61 for communication with the power board 6 and a second wireless transceiver module 11 for communication with the display screen 1. The first wireless transceiver module 61 and the second wireless transceiver module 11 are radio-connected, the first wireless transceiver module 61 is electrically connected to the power board 6, and the second wireless transceiver module 11 is electrically connected to the display screen 1.

[0049] See also Figure 4 ,like Figure 4 As shown, the implementation of the wireless communication system is first based on software adaptation of the communication protocol of the two wireless transceiver modules. The display screen 1 has the function of realizing human-computer interaction. By operating the display screen 1, the operation input data is obtained, and the second wireless transceiver module 11 encodes, modulates, and power-amplifies the operation input data. The second wireless transceiver module 11 transmits electromagnetic waves to the first wireless transceiver module 61 next to the power board 6 after filtering, and transmits the operation input data to the power board 6 after filtering, amplification, demodulation, and decoding, so as to control the start of the load of the power board 6. Similarly, the data of the power board 6 can also be fed back to the display screen 1 through the second wireless transceiver module 11 and the first wireless transceiver module 61. The wireless communication module can also take into account the function of WI FI communication.

[0050] The embodiment of the utility model enables wireless data transmission between the power board and the display screen by setting an electrical connection between the power board and the first wireless transceiver module, and the display screen and the second wireless transceiver module, thereby realizing wireless communication. Since the transmission distance of wireless data is relatively long, the increase in the distance between the wireless transceiver modules will not affect the communication, thereby ensuring the stability of the communication between the display touch screen and the power board.

[0051] In some possible embodiments, the transmitting electromagnetic induction coil 31 and the receiving electromagnetic induction coil 32 are spaced apart by a preset distance, and the preset distance is less than or equal to 7 mm.

[0052] In one embodiment, the transmitting electromagnetic induction coil 31 is arranged on the box structure 7 of the cooking device, and the receiving electromagnetic induction coil 32 is arranged on the door structure 8 of the cooking device, and the door structure 8 covers the outer surface of the box structure 7. When the distance between the box structure 7 and the door structure 8 is less than or equal to 7 mm, the transmitting electromagnetic induction coil 31 and the receiving electromagnetic induction coil 32 can transmit electric energy normally. Exemplarily, the preset distance can be 2 mm, 3 mm, 4 mm, 4.5 mm, 5 mm, 6 mm, etc.

[0053] The embodiment of the utility model sets the preset distance between the transmitting electromagnetic induction coil and the receiving electromagnetic induction coil to a value within 7 mm, thereby ensuring that the coils can transmit electrical energy normally, improving the stability of wireless power supply, and ensuring the normal operation of the wireless power supply device.

[0054] See also Figure 1 , Figure 5 On the other hand, the present application also provides a cooking device, which includes a door structure 8, a box structure 7, a display screen 1 and the wireless power supply device, the door structure 8 is rotatably connected to the box structure 7, the display screen 1 is arranged on the door structure 8, and the wireless power supply device is electrically connected to the display screen 1.

[0055] like Figure 5 As shown, Figure 5 The appearance of a cooking device is shown. For example, the cooking device is a hexahedral structure, including a box structure 7 composed of five faces and a door structure 8 covering the surface of the box structure 7. The door structure 8 is provided with a handle 81. By pulling the handle 81, the door structure 8 can be driven to rotate around one side. Please continue to see Figure 1 , there is no wire connection between the door structure 8 and the box structure 7.

[0056] The embodiment of the utility model respectively arranges the components of the wireless power supply device on the box structure and the door structure of the cooking device, thereby eliminating the need to connect long wires between the back of the display screen and the power board, avoiding unstable power supply due to wire damage, ensuring the stability of the power supply, simplifying the power supply connection line, and saving production costs.

[0057] In some possible embodiments, the wireless power supply device also includes a power board 6 electrically connected to an external power supply, the power board 6 is arranged on the box structure 7, the door structure 8 covers the outer surface of the box structure 7, the sending circuit module 2 and the sending electromagnetic induction coil 31 are arranged at preset positions of the box structure 7, and the receiving electromagnetic induction coil 32 and the receiving circuit module 4 are arranged on the door structure 8.

[0058] Please continue to see Figure 1 ,like Figure 1As shown, the door structure 8 as a whole covers the outer surface of the box structure 7, the sending circuit module 2 and the sending electromagnetic induction coil 31 are arranged at preset positions of the box structure 7, and the receiving electromagnetic induction coil 32 and the receiving circuit module 4 are arranged on the door structure 8, so that the receiving electromagnetic induction coil 32 and the sending electromagnetic induction coil 31 are at a relatively close distance to facilitate radio transmission, and the power board 6 transmits the electric energy provided by the external power supply to the sending circuit module 2, and then transmits the electric energy to the receiving circuit module 4 through the magnetic field formed between the sending electromagnetic induction coil 31 and the receiving electromagnetic induction coil 32.

[0059] The embodiment of the utility model arranges the transmitting circuit module and the transmitting electromagnetic induction coil in the box structure, and arranges the receiving electromagnetic induction coil and the receiving circuit module on the door structure, so that the display screen can be arranged on the door structure, and the display screen and the power board can be electrically connected without relying on wires, so that the distance between the display screen and the power board is not restricted, and the problem of power supply failure caused by too long wires can be avoided.

[0060] In some possible embodiments, the preset position is a position between the power board 6 and a top surface of an internal cavity, and the internal cavity is an internal cavity of the box structure 7 .

[0061] like Figure 3 As shown, multiple surfaces of the box structure 7 form an internal cavity, the power board 6 is arranged on the box structure 7, and there is a space between the power board 6 and the top surface of the internal cavity, in which the sending circuit module 2 and the sending electromagnetic induction coil 31 are arranged.

[0062] The embodiment of the utility model sets the sending circuit module and the sending electromagnetic induction coil at preset positions, so that wireless connection can be achieved between the power board arranged on the box body and the display screen arranged on the door body structure. There will be no pulling of physical wires when the door body structure is opened and closed, thereby simplifying the connection relationship between the door body structure and the box body structure, eliminating the complex physical wire structure, and preventing the wires from being easily damaged due to long-term pulling, resulting in unstable power supply, thereby improving the stability of the power supply device operation.

[0063] Implementing the embodiments of the present utility model can produce the following beneficial effects:

[0064] 1. The embodiment of the utility model adds an induction coil to the power supply circuit instead of wired power supply, so that there is no need to connect the power board and the display screen through a long wire, which saves the excessively long wire, avoids unstable power supply caused by damaged wire, reduces the dependence of the power supply state on the wire state, and thus improves the stability of power supply. By setting an auxiliary power supply to assist in powering the display screen, the auxiliary power supply can continue to be used to power the display screen when the induction coils are more than a preset distance apart, thereby ensuring the stability and continuity of the power supply to the display screen. The operator can continue to observe the content on the display screen, ensuring the continuity and convenience of the operator reading the information on the display screen.

[0065] 2. The embodiment of the utility model is provided with an auxiliary power switch and a lithium battery. When a power failure occurs in the external power supply, or when the distance of the induction coil is not enough to connect the receiving circuit module and the sending circuit module, the auxiliary power switch can control the lithium battery to supply power to the display screen, thereby ensuring the continuity and stability of the power supply to the display screen, avoiding power failure of the display screen due to power failure of the external power supply, and improving the anti-interference ability of the display screen power supply to external interference.

[0066] 3. In the embodiment of the utility model, an auxiliary power switch is set in the receiving circuit module. When the connection between the receiving circuit module and the transmitting circuit module is disconnected, a signal is sent to the auxiliary power switch through the wireless communication module, so that the auxiliary power switch turns on the connected lithium battery to power the display screen, thereby maintaining the stability of the wireless power supply.

[0067] 4. The embodiment of the utility model is capable of delivering current to the sending circuit module by setting up a power board electrically connected to an external power source, thereby wirelessly transmitting current to the receiving circuit module through the transmission circuit module, supplying power to the display screen and charging the lithium battery at the same time, thereby enriching the number of charging paths for the display screen.

[0068] 5. In the embodiment of the utility model, the power board is electrically connected to the first wireless transceiver module, and the display screen is electrically connected to the second wireless transceiver module, so that wireless data transmission can be carried out between the power board and the display screen to realize wireless communication. Since the transmission distance of wireless data is long, the increase in the distance between the wireless transceiver modules will not affect the communication, thereby ensuring the stability of the communication between the display touch screen and the power board.

[0069] 6. The embodiment of the utility model sets the preset distance between the transmitting electromagnetic induction coil and the receiving electromagnetic induction coil to a value within 7 mm, thereby ensuring that the coils can transmit electrical energy normally, improving the stability of wireless power supply, and ensuring the normal operation of the wireless power supply device.

[0070] 7. The embodiment of the utility model respectively arranges the components of the wireless power supply device on the box structure and the door structure of the cooking device, thereby eliminating the need to connect long wires between the back of the display screen and the power board, avoiding unstable power supply due to wire damage, ensuring the stability of the power supply, simplifying the power supply connection line, and saving production costs.

[0071] 8. In the embodiment of the utility model, the transmitting circuit module and the transmitting electromagnetic induction coil are arranged in the box structure, and the receiving electromagnetic induction coil and the receiving circuit module are arranged on the door structure, so that the display screen can be arranged on the door structure, and the display screen and the power board can be electrically connected without relying on wires, so that the distance between the display screen and the power board is not restricted, and the problem of power supply failure caused by too long wires can be avoided.

[0072] 9. The embodiment of the utility model sets the sending circuit module and the sending electromagnetic induction coil at preset positions, so that wireless connection can be achieved between the power board set on the box body and the display screen set on the door body structure. There will be no pulling of physical wires when the door body structure is opened and closed, which simplifies the connection relationship between the door body structure and the box body structure, eliminates the complex physical wire structure, and prevents the wires from being easily damaged due to long-term pulling, resulting in unstable power supply, thereby improving the stability of the power supply device operation.

[0073] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A wireless power supply device for a display screen, characterized in that: The wireless power supply device comprises a sending circuit module (2), a transmission circuit module (3), a receiving circuit module (4) and an auxiliary power supply; the sending circuit module (2) and the receiving circuit module (4) are respectively electrically connected to the transmission circuit module (3), the sending circuit module (2) is electrically connected to an external power supply, and the receiving circuit module (4) and the auxiliary power supply (5) are respectively electrically connected to the display screen (1); The transmission circuit module (3) comprises a wirelessly connected transmitting electromagnetic induction coil (31) and a receiving electromagnetic induction coil (32); The transmitting electromagnetic induction coil (31) is electrically connected to the transmitting circuit module (2), and the receiving electromagnetic induction coil (32) is electrically connected to the receiving circuit module (4).

2. The wireless power supply device according to claim 1, characterized in that: The auxiliary power supply (5) comprises an auxiliary power switch (51) and a lithium battery (52).

3. The wireless power supply device according to claim 2, characterized in that: The auxiliary power switch (51) is arranged in the receiving circuit module (4).

4. The wireless power supply device according to claim 3, characterized in that: One end of the lithium battery (52) is connected to the receiving circuit module (4) via the auxiliary power switch (51), and the other end is electrically connected to the display screen (1).

5. The wireless power supply device according to claim 1, characterized in that: The wireless power supply device also includes a power board (6), and the sending circuit module (2) is electrically connected to the external power supply via the power board (6).

6. The wireless power supply device according to claim 5, characterized in that: The wireless power supply device is also provided with a first wireless transceiver module (61) for communication with the power board (6) and a second wireless transceiver module (11) for communication with the display screen (1); the first wireless transceiver module (61) and the second wireless transceiver module (11) are wirelessly connected; the first wireless transceiver module (61) and the power board (6) are electrically connected; and the second wireless transceiver module (11) and the display screen (1) are electrically connected.

7. The wireless power supply device according to claim 1, characterized in that: The transmitting electromagnetic induction coil (31) and the receiving electromagnetic induction coil (32) are spaced apart by a preset distance, and the preset distance is less than or equal to 7 mm.

8. A cooking device, characterized in that: The cooking device comprises a door structure (8), a box structure (7), a display screen (1) and a wireless power supply device as described in any one of claims 1 to 7, wherein the door structure (8) is rotatably connected to the box structure (7), the display screen (1) is arranged on the door structure (8), and the wireless power supply device is electrically connected to the display screen (1).

9. The cooking device according to claim 8, characterized in that The wireless power supply device also includes a power board (6) electrically connected to an external power source, the power board (6) is arranged on the box structure (7), the door structure (8) covers the outer surface of the box structure (7), the transmitting circuit module (2) and the transmitting electromagnetic induction coil (31) are arranged at preset positions of the box structure (7), and the receiving electromagnetic induction coil (32) and the receiving circuit module (4) are arranged on the door structure (8).

10. The cooking device according to claim 9, characterized in that The preset position is a position between the power board (6) and the top surface of the internal cavity, and the internal cavity is the internal cavity of the box structure (7).

Images