Household appliances

Abstract

The present application discloses a household appliance. The household appliance includes a first cavity, a second cavity, and a wireless transmission device. The second cavity is rotatably connected to the first cavity. The wireless transmission device includes a first wireless component and a second wireless component. The first wireless component is disposed on the first cavity, and the second wireless component is disposed on the second cavity. Wherein, the wireless transmission device is configured to transmit power supply energy from the first wireless component to the second wireless component and enable two-way communication between the first wireless component and the second wireless component. In this way, the wireless transmission device can achieve signal transmission while realizing power supply, and the household appliance does not need to separately provide a communication module for signal transmission, thus saving costs.

Description

Technical Field

[0001] This application relates to the technical field of household appliances, and more specifically, to a household appliance. Background Art

[0002] In household appliances such as washing machines, the inner tub rotates within the outer tub. In related technologies, a wireless power supply method is used to supply power to electrical components provided on the inner tub, such as supplying power to a balancer provided on the inner tub. In such a technical solution, in order to enable electrical components such as the balancer to communicate with a controller on the outer tub (for example, for voltage stabilization, controlling the balancer to stop or move, etc.), it is usually necessary to additionally add a communication module to achieve information interaction, increasing the cost. Summary of the Invention

[0003] An embodiment of this application provides a household appliance.

[0004] A household appliance according to an embodiment of this application, the household appliance includes:

[0005] A first cavity;

[0006] A second cavity, the second cavity being rotatably connected to the first cavity; and

[0007] A wireless transmission device, the wireless transmission device including a first wireless component and a second wireless component, the first wireless component being provided on the first cavity, and the second wireless component being provided on the second cavity;

[0008] Wherein, the wireless transmission device is configured to transmit power supply energy from the first wireless component to the second wireless component, and for two-way communication between the first wireless component and the second wireless component.

[0009] In the above household appliance, on the one hand, the first wireless component of the wireless transmission device can transmit power supply energy to the second wireless component, thereby achieving power supply to the electrical components of the second cavity. On the other hand, the first wireless component can also perform two-way communication with the second wireless component, thereby achieving information transmission between the electrical components on the first cavity and the electrical components on the second cavity. In this way, the wireless transceiver device can achieve signal transmission while realizing power supply, and the household appliance does not need to separately set up a communication module for signal transmission, saving costs.

[0010] In some embodiments, the first wireless component includes a first coil, the first coil is connected to a power input terminal, the second wireless component includes a second coil, the second coil is connected to a load, and the wireless transmission device is configured to transmit power supply energy from the first coil to the second coil, and for two-way communication through the first coil and the second coil.

[0011] In some embodiments, the first wireless component further includes a first capacitor, and the first capacitor and the first coil are connected in series to form a first resonant circuit;

[0012] The second wireless component further includes a second capacitor, and the second capacitor and the second coil are connected in series to form a second resonant circuit;

[0013] Wherein, the first resonant circuit is configured to transmit power supply energy to the second coil through the first coil, and the second resonant circuit is configured to receive the power supply energy transmitted by the first coil through the second coil.

[0014] In some embodiments, the first wireless component further includes a first inductor and a third capacitor. The first inductor and the third capacitor are connected in series and then connected in parallel across the two ends of the first coil. The first coil, the first inductor and the third capacitor together form a third resonant circuit;

[0015] The second wireless component further includes a second inductor and a fourth capacitor. The second inductor and the fourth capacitor are connected in series and then connected in parallel across the two ends of the second coil. The second coil, the second inductor and the fourth capacitor together form a fourth resonant circuit.

[0016] In some embodiments, the resonant frequency at which the first coil transmits power supply energy is different from the resonant frequency of the first coil during two-way communication with the second coil.

[0017] In some embodiments, the resonant frequency of the first coil during communication with the second coil is greater than or equal to 10 times the resonant frequency at which the first coil transmits power supply energy.

[0018] In some embodiments, the first wireless component further includes a third inductor and a fourth inductor. The first inductor, the third inductor and the fourth inductor form a first coupling circuit. The first inductor is coupled to the third inductor and the fourth inductor respectively. The third inductor is connected to a first signal demodulation circuit, and the fourth inductor is connected to a first signal generator;

[0019] The second wireless component further includes a fifth inductor and a sixth inductor. The second inductor, the fifth inductor and the sixth inductor form a second coupling circuit. The second inductor is coupled to the fifth inductor and the sixth inductor respectively. The fifth inductor is connected to a second signal demodulation circuit, and the sixth inductor is connected to a second signal generator.

[0020] In some embodiments, the first wireless component further includes a fifth capacitor, and the fifth capacitor is connected in parallel across the two ends of the third inductor. The second wireless component further includes a sixth capacitor, and the sixth capacitor is connected in parallel across the two ends of the fifth inductor.

[0021] In some embodiments, the first wireless component further includes a first DC-blocking capacitor connected between the fourth inductor and the second signal generator, and the second wireless component further includes a second DC-blocking capacitor connected between the sixth inductor and the second signal generator.

[0022] In some embodiments, the first wireless component further includes a first signal amplification circuit connected between the first DC-blocking capacitor and the first signal generator, and the second wireless component further includes a second signal amplification circuit connected between the second DC-blocking capacitor and the second signal generator.

[0023] In some embodiments, the first wireless component further includes a seventh inductor connected between the first coil and the power input terminal, and the second wireless component further includes an eighth inductor connected between the second coil and the load.

[0024] In some embodiments, the seventh inductor and the first coil together form a first coil assembly, and the eighth inductor and the second coil together form a second coil assembly.

[0025] Additional aspects and advantages of the embodiments of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 is a schematic structural diagram of a household appliance according to an embodiment of the present application;

[0028] Figure 2 is an exploded schematic diagram of a household appliance according to an embodiment of the present application;

[0029] Figure 3 is a schematic module diagram of power transmission and two-way communication of a wireless transmission device according to an embodiment of the present application;

[0030] Figure 4 is a schematic circuit diagram of a wireless transmission device according to an embodiment of the present application;

[0031] Figure 5 is another schematic circuit diagram of a wireless transmission device according to an embodiment of the present application;

[0032] Figure 6It is another schematic diagram of the circuit structure of the wireless transmission device according to the embodiment of the present application;

[0033] Figure 7 It is still another schematic diagram of the circuit structure of the wireless transmission device according to the embodiment of the present application;

[0034] Figure 8 It is still another schematic diagram of the circuit structure of the wireless transmission device according to the embodiment of the present application.

[0035] Description of main component symbols:

[0036] Household appliance 1000;

[0037] Wireless transmission device 100, first cavity 200, second cavity 300, mounting bracket 400, rotating shaft 500;

[0038] First wireless component 10, first coil 11, first capacitor 12, first resonant circuit 13, first inductor 14, third capacitor 15, third resonant circuit 16, third inductor 17, fourth inductor 18, first coupling circuit 19, first signal demodulation circuit 101, first signal generator 102, fifth capacitor 103, seventh inductor 104, first DC-blocking capacitor 105, first signal amplification circuit 106;

[0039] Second wireless component 20, second coil 21, second capacitor 22, second resonant circuit 23, second inductor 24, fourth capacitor 25, fourth resonant circuit 26, fifth inductor 27, sixth inductor 28, second coupling circuit 29, second signal demodulation circuit 201, second signal generator 202, sixth capacitor 203, eighth inductor 204, second DC-blocking capacitor 205, second signal amplification circuit 206,

[0040] Power input terminal 30, load 40. Specific embodiments

[0041] The following describes in detail the embodiments of the present application. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0042] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0043] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0044] The present disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0045] Please refer to Figures 1 - 3 , the household appliance 1000 according to the embodiment of the present application includes a first cavity 200, a second cavity 300, and a wireless transmission device 100. The second cavity 300 is rotatably connected to the first cavity 200. The wireless transmission device 100 includes a first wireless component 10 and a second wireless component 20. The first wireless component 10 is disposed on the first cavity 200, and the second wireless component 20 is disposed on the second cavity 300. Among them, the wireless transmission device 100 is configured to transmit power supply energy from the first wireless component 10 to the second wireless component 20 and perform two-way communication between the first wireless component 10 and the second wireless component 20. Specifically, the household appliance 1000 can be a laundry treatment appliance such as a washing machine or a dryer, or other household appliances 1000 having a rotatable second cavity 300. Items such as clothes and quilts that need to be washed can be placed in the second cavity 300.

[0046] It can be understood that in household appliances such as washing machines, the inner tub rotates inside the outer tub. In the related art, a wireless power supply method is used to supply power to electrical components disposed on the inner tub, such as supplying power to a balancer disposed on the inner tub. In such a technical solution, in order to enable electrical components such as the balancer to communicate with a controller on the outer tub (such as voltage stabilization, controlling the balancer to stop or move, etc.), it is usually necessary to additionally add a communication module to achieve information interaction. However, this increases the cost.

[0047] In the household appliance 1000 of the present embodiment, on the one hand, the first wireless component 10 of the wireless transmission device 100 can transmit power supply energy to the second wireless component 20, thereby realizing power supply to the electrical components on the second cavity 300. For example, it supplies power to a balancer (not shown in the figure) provided on the second cavity 300. On the other hand, the first wireless component 10 can also communicate bidirectionally with the second wireless component 20, thereby realizing information transmission between the electrical components on the first cavity 200 and the electrical components on the second cavity 300. In this way, the wireless transmission device 100 can realize signal transmission while realizing power supply, and the household appliance 1000 does not need to additionally set up a communication module for signal transmission, saving costs.

[0048] Specifically, taking the household appliance 1000 as a washing machine as an example, in the embodiment of the present application, the first cavity 200 is the outer tub of the washing machine, and the second cavity 300 is the inner tub of the washing machine. The second cavity 300 is arranged inside the first cavity 200 and can rotate inside the first cavity 200 to realize washing, rinsing and dehydration of the clothes placed in the second cavity 300. Due to the uneven distribution of the washing objects in the second cavity 300, there is an eccentricity. When the second cavity 300 rotates at a high speed, a large vibration will be generated. Usually, a balance component is installed on the second cavity 300. The balance component is provided with a movable balancer. By controlling the movement of the balancer, the eccentricity of the clothes in the second cavity 300 can be balanced by the self-gravity and centripetal force of the balancer, so that the vibration of the second cavity 300 tends to decrease, and further reduce the noise and vibration of the washing machine.

[0049] In this embodiment, the first wireless component 10 is disposed on the first cavity 200 and connected to an external power supply. The first wireless component 10 is relatively fixed to the first cavity 200. The second wireless component 20 is disposed on the second cavity 300. The second wireless component 20 is relatively fixed to the second cavity 300. The second wireless component 20 can rotate relative to the first cavity 200 following the second cavity 300. The second wireless component 20 is electrically connected to a balancer (not shown in the figure) mounted on the second cavity 300. The first wireless component 10 can transmit power supply energy to the second wireless component 20 to achieve power transmission, so that the second wireless component 20 can supply power to the balancer, thereby driving the balancer to move to balance the eccentric mass. At the same time, on the one hand, in order to accurately control the position of the balancer, it is necessary to detect the position of the balancer and send the position signal of the balancer to the control board disposed on the first cavity 200. On the other hand, in order to achieve voltage feedback, it is also necessary to feedback the output voltage of the second wireless component 20 to the control board on the first cavity 200 for voltage regulation. In the related art, information transmission, such as voltage feedback, is usually achieved by adding communication modules on the first cavity 200 and the second cavity 300 respectively. However, in the embodiment of the present application, the first wireless component 10 can transmit power supply energy to the second wireless component 20 to achieve power supply, and can also communicate bidirectionally with the second wireless component 20 to achieve information transmission, such as voltage feedback, position feedback, temperature feedback, control instruction transmission, etc., without the need to additionally set up communication modules, saving costs.

[0050] It should be noted that in this article, "the first wireless component 10 is disposed on the first cavity 200, and the second wireless component 20 is disposed on the second cavity 300" can be understood as the first wireless component 10 is relatively fixed to the first cavity 200, and the second wireless component 20 is relatively fixed to the second cavity 300. Specifically, the first wireless component 10 can be directly fixedly mounted on the first cavity 200 or fixedly mounted on the first cavity 200 through other intermediate components, such as a mounting plate. The mounting method of the second wireless component 20 can be the same as or different from that of the first wireless component 10, as long as the second wireless component 20 is relatively fixed to the second cavity 300.

[0051] Please refer to Figure 4 , in some embodiments, the first wireless component 10 includes a first coil 11. The first coil 11 is connected to a power input terminal 30. The second wireless component 20 includes a second coil 21. The second coil 21 is connected to a load 40. The wireless transmission device 100 is configured to transmit power supply energy from the first coil 11 to the second coil 21, and communicate bidirectionally through the first coil 11 and the second coil 21.

[0052] In this way, the first wireless component 10 can transmit wireless power supply energy to the second coil 21 of the second wireless component 20 through the first coil 11, so that the second coil 21 generates electrical energy to supply power to the load 40. At the same time, it can also conduct two-way communication through the first coil 11 and the second coil 21. In this way, each wireless component can use a single coil to achieve both power supply and two-way communication, further saving costs.

[0053] Specifically, in the embodiments of the present application, the first coil 11 and the second coil 21 can also use the principle of magnetic resonance to transmit electrical energy. In such an example, both the first coil 11 and the first coil 11 are resonance coils. The first coil 11 can emit an electromagnetic field during vibration, and the second coil 21 resonates with the first coil 11 to generate a current and then convert it into electrical energy, thus realizing power transmission.

[0054] It can be understood that in other embodiments, the first coil 11 and the second coil 21 can use the principle of electromagnetic induction to transmit electrical energy. In such an example, the first coil 11 is a transmitting coil and the second coil 21 is a receiving coil. The first coil 11 is connected to the power input terminal 30, and the power input terminal 30 can supply alternating current to the first coil 11. After the first coil 11 receives the alternating current, it will generate a continuously changing magnetic field. When the second coil 21 senses the change of this magnetic field, it will generate an induced current, thus realizing power transmission.

[0055] It can be understood that in the embodiments of the present application, the first coil 11 and the second coil 21 are arranged opposite to each other at intervals. The first coil 11 is fixed on the first cavity 200, and the second coil 21 is fixed on the second cavity 300 and can rotate with the second cavity 300. When the second cavity 300 rotates relative to the first cavity 200, there is always an overlapping part between the first coil 11 and the second coil 21. That is to say, when the second cavity 300 rotates, the first coil 11 and the second coil 21 can also realize power transmission and two-way communication. Specifically, in an example, the first coil 11 is fixedly installed on the first cavity 200 and the central axis of the first coil 11 coincides with the rotation axis L of the second cavity 300 or the eccentricity between the two is within the desired range, and the second coil 21 also coincides with the rotation axis L of the second cavity 300 or the eccentricity between the two is within the desired range. In this way, no matter what state the second cavity 300 is in, the first coil 11 and the second coil 21 can achieve relatively stable power supply and two-way communication.

[0056] Specifically, please refer to Figure 2, in some embodiments, the household appliance 1000 includes a mounting bracket 400 which is mounted on the first cavity 200. The first coil 11 can be mounted on the mounting bracket 400, thereby fixedly mounting the first coil 11 on the first cavity 200. In addition, the household appliance 1000 further includes a rotating shaft 500 which rotatably penetrates the first cavity 200. A support frame 600 is fixed on the second cavity 300, and the support frame 600 is fixedly connected to the second cavity 300. The rotating shaft 500 is fixedly connected to the support frame 600. When the rotating shaft 500 rotates, it can drive the support frame 600 to rotate and further drive the second cavity 300 to rotate relative to the first cavity 200. The second coil 21 is mounted at the end of the rotating shaft 500. In the illustrated embodiment, the first coil 11, the second coil 21 and the rotating shaft 500 are all coaxially arranged, that is, the central axes of the first coil 11 and the second coil 21 coincide with the rotation axis L of the rotating shaft 500 and the second cavity 300.

[0057] It can be understood that in such an embodiment, the household appliance 1000 further includes a housing (not shown in the figure) and a driving device 700. The first cavity 200 is disposed in the housing and fixedly connected to the housing. The driving device 700 is disposed on the housing and connected to the rotating shaft 500. The driving device 700 can drive the rotating shaft 500 to rotate, thereby driving the second cavity 300 to rotate within the first cavity 200. Specifically, the driving device 700 can be a motor, and the motor can be connected to the rotating shaft 500 through a transmission belt, thereby driving the rotating shaft 500 by means of belt transmission, so as to realize the high-speed rotation of the second cavity 300.

[0058] In the embodiments of the present application, the load 40 can be an electrical component on the second cavity 300, such as a battery, a motor, a controller, a sensor, etc. of a balancer. The electric energy generated by the second coil 21 can be stored in the battery or directly supplied to the motor of the balancer to drive the balancer to rotate to balance the eccentric mass.

[0059] Further, please refer to Figure 4 , in certain embodiments, the first wireless component 10 further includes a first capacitor 12, and the first capacitor 12 and the first coil 11 are connected in series to form a first resonant circuit 13. The second wireless component 20 further includes a second capacitor 22, and the second capacitor 22 and the second coil 21 are connected in series to form a second resonant circuit 23. Among them, the first resonant circuit 13 is configured to transmit power supply energy to the second coil 21 through the first coil 11, and the second resonant circuit 23 is configured to receive the power supply energy transmitted by the first coil 11 through the second coil 21.

[0060] Thus, the first resonant circuit 13 generates a resonant wave through the first coil 11, and the second coil 21 of the second resonant circuit 23 resonates with the first coil 11 to generate a current to achieve power supply transmission.

[0061] Specifically, one end of the first capacitor 12 is connected to the first coil 11, and the other end is grounded. It can be understood that the resonance frequency of the second resonance circuit 23 is the same as that of the first resonance circuit 13. It should be noted that the power supply energy described in this article refers to the electromagnetic wave energy emitted by the first coil 11. For example, the first coil 11 generates electromagnetic waves, and resonance occurs between the second coil 21 and the first coil 11, thereby generating an induced current. Another example is that the first coil 11 generates a changing magnetic field, which causes the second coil 21 to generate an induced current.

[0062] Furthermore, please continue to refer to Figure 4 , in some embodiments, the first wireless component 10 further includes a first inductor 14 and a third capacitor 15. After the first inductor 14 and the third capacitor 15 are connected in series, they are connected in parallel across both ends of the first coil 11. The first coil 11, the first inductor 14, and the third capacitor 15 together form a third resonance circuit 16. The second wireless component 20 further includes a second inductor 24 and a fourth capacitor 25. After the second inductor 24 and the fourth capacitor 25 are connected in series, they are connected in parallel across both ends of the second coil 21. The second coil 21, the second inductor 24, and the fourth capacitor 25 together form a fourth resonance circuit 26.

[0063] In this way, bidirectional transmission of signals and instructions can be stably achieved through the third resonance circuit 16 and the fourth resonance circuit 26. It can be understood that in the embodiments of the present application, the resonance frequency of the third resonance circuit 16 is the same as that of the fourth resonance circuit 26.

[0064] Specifically, in such an embodiment, the first coil 11 forms different resonance circuits with different inductors and capacitors, namely the first resonance circuit 13 and the third resonance circuit 16. The second coil 21 forms different resonance circuits with different inductors and capacitors, namely the second resonance circuit 23 and the fourth resonance circuit 26. In this way, the first resonance circuit 13 can transmit power supply energy to the second coil 21 through the first coil 11, so that the second coil 21 of the second resonance circuit 23 generates an induced current to supply power to the load 40. The third resonance circuit 16 can communicate with the second coil 21 of the fourth resonance circuit 26 through the first coil 11, thereby realizing bidirectional transmission of signals and instructions. In this way, by using one first coil 11 and the second coil 21, the transmission of electric energy and the bidirectional transmission of signal instructions can be realized simultaneously, with a simple structure and low cost.

[0065] It can be understood that in some embodiments, the resonance frequency at which the first coil 11 emits power supply energy is different from the resonance frequency of the first coil 11 during bidirectional communication with the second coil 21.

[0066] In this way, the first coil 11 can generate different resonance frequencies to achieve bidirectional transmission of electric energy and signals, so that no interference will occur during the transmission of electric energy and bidirectional transmission of signals.

[0067] Specifically, when performing power transmission, the first resonant circuit 13 can cause the first coil 11 to generate a resonant wave with a specific frequency, for example, generate a resonant wave with a frequency of 100 KHz. At the same time, the resonant frequency of the second resonant circuit 23 is the same as the resonant frequency of the first coil 11, so that an induced current can be generated in the second coil 21 to achieve power transmission. When performing signal transmission, the third resonant circuit 16 can cause the first coil 11 to generate another resonant wave with a specific frequency, for example, generate a resonant wave with a frequency of 1 MHz. At the same time, the resonant frequency of the fourth resonant circuit 26 is also the same as the resonant frequency of the first coil 11, thus realizing two-way signal transmission. For example, the fourth resonant circuit 26 can transmit the battery voltage feedback signal of the balun to the third resonant circuit 16 through the second coil 21, and then enable the control board installed on the first cavity 200 to perform voltage stabilization according to the voltage feedback signal.

[0068] In some embodiments, when communicating with the second coil 21, the resonant frequency of the first coil 11 is greater than or equal to 10 times the resonant frequency when the first coil 11 emits power supply energy.

[0069] In this way, when communicating, the relatively high resonant frequency of the first coil 11 enables the first coil 11 to not only achieve power supply transmission but also perform high-speed data transmission.

[0070] Specifically, in one example, the resonant frequency of the first coil 11 when emitting power supply energy is 100 KHz, and when communicating, the resonant frequency of the first coil 11 is 1 MHz. In this way, the carrier frequency during communication is 10 times the frequency during power supply, and the communication rate is relatively fast, which is higher than the communication rates of communication methods such as Bluetooth communication or infrared communication, and the transmission rate is faster. In one example, the communication rate between the first coil 11 and the second coil 21 is above 9600 baud rate.

[0071] Please refer to Figure 5 , further, in some embodiments, the first wireless component 10 further includes a third inductor 17 and a fourth inductor 18. The first inductor 14, the third inductor 17, and the fourth inductor 18 form a first coupling circuit 19. The first inductor 14 is coupled to the third inductor 17 and the fourth inductor 18 respectively. The third inductor 17 is connected to the first signal demodulation circuit 101, and the fourth inductor 18 is connected to the first signal generator 102. The second wireless component 20 further includes a fifth inductor 27 and a sixth inductor 28. The second inductor 24, the fifth inductor 27, and the sixth inductor 28 form a second coupling circuit 29. The second inductor 24 is coupled to the fifth inductor 27 and the sixth inductor 28 respectively. The fifth inductor 27 is connected to the second signal demodulation circuit 201, and the sixth inductor 28 is connected to the second signal generator 202.

[0072] Thus, the first coupling circuit 19 enables the first wireless component 10 to transmit the communication signal received by the first coil 11 to the first signal demodulation circuit 101 through the coupling of the first inductor 14 and the third inductor 17, thereby realizing signal demodulation. It can also transmit the communication signal emitted by the first signal generator 102 to the first coil 11 through the coupling of the first inductor 14 and the fourth inductor 18, thereby sending the communication signal to the second coil 21.

[0073] The second coupling circuit 29 enables the second wireless component 20 to transmit the communication signal received by the second coil 21 to the second signal demodulation circuit 201 through the coupling of the second inductor 24 and the fifth inductor 27, thereby realizing signal demodulation. It can also transmit the communication signal emitted by the second signal generator 202 to the second coil 21 through the coupling of the second inductor 24 and the sixth inductor 28, thereby sending the communication signal to the first coil 11.

[0074] Specifically, in the embodiment of the present application, the first inductor 14, the third inductor 17, and the fourth inductor 18 together form a mutual inductance coupler, and the second inductor 24, the fifth inductor 27, and the sixth inductor 28 form another mutual inductance coupler. One end of the third inductor 17 is connected to the first signal demodulation circuit 101, and the other end is grounded. One end of the fourth inductor 18 is connected to the first signal generator 102, and the other end is grounded. One end of the fifth inductor 27 is connected to the second signal demodulation circuit 201, and the other end is grounded. One end of the sixth inductor 28 is connected to the second signal generator 202, and the other end is grounded.

[0075] The signal sent by the first wireless component 10 can be generated by a control board provided on the first cavity 200, such as a control board for controlling the rotation speed of the second cavity 300. The signal sent by the second wireless component 20 can be generated by a control board provided on the second cavity 300, such as the control circuit board of a balancer.

[0076] In this embodiment, the first signal generator 102 is connected to the transmission port on the control board provided on the first cavity 200, and the first signal demodulation circuit 101 is connected to the reception port of the control board. During the process of the first wireless component 10 sending a communication signal to the second wireless component 20, after the first signal generator 101 receives the control signal, it generates a resonant signal and transmits it to the fourth inductor 18. The fourth inductor 18 transmits the resonant signal to the first inductor 14 coupled to it. The third resonant circuit 16 transmits the resonant signal to the second coil 21 through the first coil 11. Then, the fourth resonant circuit 26 transmits the resonant signal to the fifth inductor 27 through the second inductor 24. The fifth inductor 27 transmits the resonant signal to the second signal demodulation circuit 201, and the second signal demodulation circuit 201 demodulates the signal and then transmits the signal to the control board provided on the second cavity 300, thereby realizing signal transmission.

[0077] The second signal generator 202 is connected to the transmission port of the control board provided on the second cavity 300, and the second signal demodulation circuit 201 is connected to the receiving port of the control board. During the process of the second wireless component 20 sending a communication signal to the first wireless component 10, after receiving the control signal, the second signal generator 202 generates a resonant signal and transmits it to the sixth inductor 28. The sixth inductor 28 transmits the resonant signal to the second inductor 24 coupled thereto. The fourth resonant circuit 26 transmits the resonant signal to the first coil 11 through the second coil 21, and then the third resonant circuit 16 transmits the resonant signal to the third inductor 17 through the first inductor 14. The third inductor 17 transmits the resonant signal to the first signal demodulation circuit 101, and the first signal demodulation circuit 101 demodulates the signal and then transmits the signal to the control board provided on the first cavity 200, thereby realizing signal transmission.

[0078] Please refer to Figure 5 , further, in some embodiments, the first wireless component 10 further includes a fifth capacitor 103, and the fifth capacitor 103 is connected in parallel across the third inductor 17. The second wireless component 20 further includes a sixth capacitor 203, and the sixth capacitor 203 is connected in parallel across the fifth inductor 27.

[0079] In this way, the fifth capacitor 103 and the third inductor 17 form a resonant circuit so that the third inductor 17 can receive the resonant signal generated by the first inductor 14, and then transmit the resonant signal to the first signal demodulation circuit 101 for demodulation. The sixth capacitor 203 and the fifth inductor 27 form another resonant circuit so that the fifth inductor 27 can receive the resonant signal generated by the second inductor 24, and then transmit the resonant signal to the second signal demodulation circuit 201 for demodulation.

[0080] Please refer to Figure 6 , in some embodiments, the first wireless component 10 further includes a seventh inductor 104, and the seventh inductor 104 is connected between the first coil 11 and the power input terminal 30. The second wireless component 20 further includes an eighth inductor 204, and the eighth inductor 204 is connected between the second coil 21 and the load 40.

[0081] In this way, the seventh inductor 104 can separate the first coil 11 from the power input terminal 30, thereby preventing the electrical signal received or generated by the first coil 11 from being short-circuited and directly transmitted to the power input terminal 30, causing the first inductor 14 to lose its communication function. The eighth inductor 204 can separate the second coil 21 from the load 40, thereby preventing the signal received or generated by the second coil 21 from being directly transmitted to the load 40, causing the second coil 21 to lose its communication function.

[0082] It can be understood that in such an embodiment, the seventh inductor 104 and the eighth inductor 204 can also both be coils, so that the seventh inductor 104 can also transmit power supply energy to the eighth inductor 204 to achieve the transmission of electrical energy.

[0083] Further, in some embodiments, the seventh inductor 104 and the first coil 11 together form a coil assembly, and the eighth inductor 204 and the second coil 21 together form another coil assembly.

[0084] In this way, the seventh inductor 104 and the first coil 11 can use a single coil assembly without setting two separate coils, and the eighth inductor 204 and the second coil 21 can also use a single coil assembly without setting two separate coils, which is more practical and simpler.

[0085] Specifically, in such an embodiment, the seventh inductor 104 and the first coil 11 are connected into an integral coil assembly, and the two are different parts of the same coil assembly. During the connection process, one end of the first inductor 14 can be connected to a certain part of the coil assembly, so as to divide the coil assembly into the first coil 11 and the seventh inductor 104. The part of the coil assembly to which the first inductor 14 is connected can be determined according to the number of turns of the first coil 11 and the seventh inductor 104. The eighth inductor 204 and the second coil 21 are also connected into an integral coil assembly, and the two are different parts of the same coil assembly. During the connection process, one end of the second inductor 24 can be connected to a certain part of the coil assembly, so as to divide the coil assembly into the second coil 21 and the eighth inductor 204. The part of the coil assembly to which the second inductor 24 is connected can be determined according to the number of turns of the second coil 21 and the eighth inductor 204.

[0086] Please refer to Figure 7 , in certain embodiments, the first wireless component 10 further includes a first DC-blocking capacitor 105, and the first DC-blocking capacitor 105 is connected between the fourth inductor 18 and the second signal generator 202. The second wireless component 20 further includes a second DC-blocking capacitor 205, and the second DC-blocking capacitor 205 is connected between the sixth inductor 28 and the second signal generator 202.

[0087] In this way, the first DC-blocking capacitor 105 and the second DC-blocking capacitor 205 can isolate DC signals and pass AC signals, thereby preventing DC from being introduced into the circuit and burning out internal units.

[0088] Please refer to Figure 8 , in certain embodiments, the first wireless component 10 further includes a first signal amplification circuit 106, and the first signal amplification circuit 106 is connected between the first DC-blocking capacitor 105 and the first signal generator 102. The second wireless component 20 further includes a second signal amplification circuit 206, and the second signal amplification circuit 206 is connected between the second DC-blocking capacitor 205 and the second signal generator 202.

[0089] Thus, the first signal amplification circuit 106 can amplify the signal of the first signal generator 102, and the second signal amplification circuit 206 can amplify the signal of the second signal generator 202, so as to obtain a signal with a specific frequency, for example, a signal with a frequency of 1 MHz.

[0090] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0091] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An household appliance, characterized in that, comprising: a first cavity; a second cavity, the second cavity being rotatably connected to the first cavity; and a wireless transmission device, the wireless transmission device comprising a first wireless component and a second wireless component, the first wireless component being disposed on the first cavity and the second wireless component being disposed on the second cavity; wherein, the first wireless component comprises a first coil, the first coil being connected to a power input terminal, the second wireless component comprises a second coil, the second coil being connected to a load, there is always an overlapping portion between the first coil and the second coil, and the wireless transmission device is configured to transmit power supply energy from the first coil to the second coil and perform two-way communication through the first coil and the second coil; the first wireless component further comprises a first capacitor, the first capacitor and the first coil being connected in series to form a first resonant circuit; the second wireless component further comprises a second capacitor, the second capacitor and the second coil being connected in series to form a second resonant circuit; wherein, the first resonant circuit is configured to transmit power supply energy from the first coil to the second coil, and the second resonant circuit is configured to receive the power supply energy transmitted by the first coil through the second coil; the first wireless component further comprises a first inductor and a third capacitor, the first inductor and the third capacitor being connected in series and then connected in parallel across the two ends of the first coil, the first coil, the first inductor and the third capacitor together forming a third resonant circuit; the second wireless component further comprises a second inductor and a fourth capacitor, the second inductor and the fourth capacitor being connected in series and then connected in parallel across the two ends of the second coil, the second coil, the second inductor and the fourth capacitor together forming a fourth resonant circuit; the first wireless component further comprises a third inductor and a fourth inductor, the first inductor, the third inductor and the fourth inductor forming a first coupling circuit, the first inductor being coupled to the third inductor and the fourth inductor respectively, the third inductor being connected to a first signal demodulation circuit, and the fourth inductor being connected to a first signal generator; the second wireless component further comprises a fifth inductor and a sixth inductor, the second inductor, the fifth inductor and the sixth inductor forming a second coupling circuit, the second inductor being coupled to the fifth inductor and the sixth inductor respectively, the fifth inductor being connected to a second signal demodulation circuit, and the sixth inductor being connected to a second signal generator.

2. The household appliance according to claim 1, characterized in that, the resonance frequency at which the first coil transmits power supply energy is different from the resonance frequency of the first coil during two-way communication with the second coil.

3. The household appliance according to claim 2, characterized in that, the resonance frequency of the first coil during communication with the second coil is greater than or equal to 10 times the resonance frequency at which the first coil transmits power supply energy.

4. The household appliance according to claim 1, characterized in that, The first wireless component further includes a fifth capacitor, the fifth capacitor is connected in parallel across the two ends of the third inductor, the second wireless component further includes a sixth capacitor, and the sixth capacitor is connected in parallel across the two ends of the fifth inductor.

5. The household appliance according to claim 4, wherein, the first wireless component further includes a first DC-blocking capacitor, the first DC-blocking capacitor is connected between the fourth inductor and the second signal generator, the second wireless component further includes a second DC-blocking capacitor, and the second DC-blocking capacitor is connected between the sixth inductor and the second signal generator.

6. The household appliance according to claim 5, wherein, the first wireless component further includes a first signal amplification circuit, the first signal amplification circuit is connected between the first DC-blocking capacitor and the first signal generator, the second wireless component further includes a second signal amplification circuit, and the second signal amplification circuit is connected between the second DC-blocking capacitor and the second signal generator.

7. The household appliance according to claim 1, wherein, the first wireless component further includes a seventh inductor, the seventh inductor is connected between the first coil and the power input terminal, the second wireless component further includes an eighth inductor, and the eighth inductor is connected between the second coil and the load.

8. The household appliance according to claim 7, wherein, the seventh inductor and the first coil together form a first coil assembly, and the eighth inductor and the second coil together form a second coil assembly.

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