Refrigerator with wireless power supply lighting device

Abstract

The utility model relates to a refrigerator with a wireless power supply lighting device, which is characterized in that a lighting lamp is arranged on a shelf of the refrigerator, the lighting lamp is provided with a wireless electric energy receiving device, and the wireless electric energy receiving device is electrically connected with a power supply access end of the lighting lamp; a wireless electric energy transmitting device for transmitting wireless electric energy to the wireless electric energy receiving device is arranged on the side wall of the refrigerator storage cabinet; a signal generation module is carried in the wireless electric energy receiving device; a signal induction switch for triggering the wireless electric energy transmitting device to transmit electric energy to the outside is carried in the wireless electric energy transmitting device; when the wireless electric energy transmitting device and the wireless electric energy receiving device approach each other, the signal generation module triggers the signal induction switch. According to the scheme, power is supplied to the illuminating lamp of the shelf in the refrigerator in a wireless power supply mode, the circuit wiring difficulty in the refrigerator is lowered, the refrigerator is more convenient to install, the situation that wires of the illuminating lamp are damaged when the refrigerator is disassembled and maintained is effectively avoided, and it can be ensured that the wireless power supply process of the illuminating lamp is stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigeration equipment technical field especially, relates to a refrigerator with wireless power illumination device. BACKGROUND

[0002] The refrigerator as a kind of container that can keep food or other articles constant low temperature cold state has become one of modern family essential household appliances. Among them, the refrigerator usually includes the cold room and the freezer room, which are separated, to store the articles at different temperatures. To assist lighting, most of the refrigerator will increase the configuration of lighting lamp inside, and some of the refrigerator will directly embed the lighting lamp in the side wall of the cold room and the freezer room. Some of the refrigerator will install the lighting lamp on the food shelf inside the cold room and the freezer room, so the lighting lamp wire on the shelf needs to be connected to the internal power supply of the refrigerator, which further increases the difficulty of circuit wiring inside the refrigerator, making the installation process of the refrigerator very inconvenient, and the lighting lamp wire on the shelf is easily damaged when disassembling and maintaining the refrigerator. SUMMARY

[0003] To solve the technical problems of the prior art to the greatest extent, the utility model provides a refrigerator with wireless power illumination device, which can power the lighting lamp of the shelf inside the refrigerator by wireless power supply, reduce the difficulty of circuit wiring inside the refrigerator, make the installation of the refrigerator more convenient, effectively avoid the damage of the lighting lamp wire when disassembling and maintaining the refrigerator, and ensure the stability of the process of wireless power supply for the lighting lamp.

[0004] The utility model discloses a refrigerator with wireless power illumination device, including the shelf of setting in the refrigerator storage cabinet, the shelf is provided with lighting lamp, the lighting lamp is carried with wireless electric energy receiving device, wireless electric energy receiving device electric connection in the power access end of lighting lamp to the transmission electric energy of lighting lamp;

[0005] The side wall of the refrigerator storage cabinet is provided with wireless electric energy transmitting device for transmitting wireless electric energy to the wireless electric energy receiving device;

[0006] Among them, the signal generating module is carried in the wireless electric energy receiving device;The signal induction switch for triggering the wireless electric energy transmitting device to send electric energy outside is carried in the wireless electric energy transmitting device;

[0007] When the wireless electric energy transmitting device and the wireless electric energy receiving device are close to each other, the signal generating module triggers the signal induction switch.

[0008] The utility model relates to a refrigerator with wireless power supply lighting device, signal generating module is magnet, signal induction switch is hall sensor,

[0009] The hall sensor triggers the wireless power transmission device to send electric energy outward after detecting the magnetic field of the magnet.

[0010] According to the refrigerator with wireless power supply lighting device of the utility model, the illumination lamp is arranged at the side of the shelf and the light emitting side faces the bearing space inside the shelf.

[0011] According to the refrigerator with wireless power supply lighting device of the utility model, the illumination lamp is arranged at the side of the shelf and the light emitting side faces the bearing space inside the shelf.

[0012] According to the refrigerator with wireless power supply lighting device of the utility model, the illumination lamp is arranged at the side of the shelf and the light emitting side faces the bearing space inside the shelf.

[0013] According to the refrigerator with wireless power supply lighting device of the utility model, the electric energy transmission module includes power module, MCU main control unit, totem column drive circuit module, H bridge circuit module, LC oscillator module,

[0014] The power module provides direct current power supply for the MCU main control unit, the hall sensor is connected to the MCU main control unit, the hall sensor triggers the MCU main control unit to output PWM signal after detecting the magnetic field of the magnet, the signal input end of the totem column drive circuit module is connected to the PWM output end of the MCU main control unit, the signal output end of the totem column drive circuit module is connected to the signal input end of the H bridge circuit module to amplify and drive the H bridge circuit module, the signal output end of the H bridge circuit module is connected to the signal input end of the LC oscillator module to control LC oscillator module to generate high frequency oscillation signal and send wireless electric energy to the wireless electric energy receiving device,

[0015] The wireless electric energy receiving device is equipped with resonant circuit, and the wireless electric energy receiving device receives wireless electric energy from the LC oscillator module through the resonant circuit.

[0016] According to the refrigerator with wireless power supply lighting device of the utility model, the electric energy transmission module further includes low dropout linear regulator (LDO), and the low dropout linear regulator (LDO) is connected to the power module to convert high voltage of the power module into low voltage and supply power to the MCU main control unit.

[0017] The electric energy emitting module further comprises a state indicating lamp module, and the state indicating lamp module is connected to the control end of the MCU host.

[0018] The electric energy emitting module further comprises an overcurrent detection circuit module, the overcurrent detection circuit module is connected to the LC oscillator module and the MCU host, and the MCU host detects whether the current of the LC oscillator module is abnormal through the overcurrent detection circuit module.

[0019] The refrigerator with the wireless power supply lighting device comprises a refrigerator body, a plurality of H-bridge circuit modules, a plurality of totem column driving circuit modules, a plurality of LC oscillator modules, a MCU host and a state indicating lamp module.

[0020] The left upper arm, the right upper arm, the left lower arm and the right lower arm of the H-bridge circuit module are respectively driven by each totem column driving circuit module.

[0021] The signal output ends of the upper arm and the lower arm of the H-bridge circuit module are respectively provided with P-MOS tubes and N-MOS tubes, the P-MOS tubes and the N-MOS tubes are respectively connected to the signal input ends of the LC oscillator modules to control the LC oscillator circuit modules to generate the resonant frequency.

[0022] The utility model discloses a refrigerator with wireless power supply lighting device increases the wireless electric energy receiving device on the lighting lamp of refrigerator internal layer frame, wireless electric energy receiving device electric connection in the power access end of lighting lamp to transmission electric energy to lighting lamp, at the same time, still sets up a wireless electric energy transmitting device for sending wireless electric energy to wireless electric energy receiving device on the lateral wall of refrigerator storage cabinet, and therefore, after wireless electric energy transmitting device sends wireless electric energy to wireless electric energy receiving device, can realize wireless power supply to lighting lamp, in addition, in order to ensure the stability of wireless power supply, wireless electric energy receiving device is equipped with a signal generating module, and wireless electric energy transmitting device is equipped with a signal induction switch for triggering wireless electric energy transmitting device to send electric energy outward, when wireless electric energy transmitting device and wireless electric energy receiving device are close to each other, signal generating module triggers signal induction switch, and signal induction switch triggers wireless electric energy transmitting device to send wireless electric energy to wireless electric energy receiving device, and therefore, wireless electric energy transmitting device can detect whether wireless electric energy receiving device is in the accurate power supply position through signal induction switch, and ensure that wireless electric energy transmitting device sends wireless electric energy to wireless electric energy receiving device only when wireless electric energy receiving device is in the accurate power supply position, otherwise, wireless electric energy transmitting device does not send wireless electric energy to wireless electric energy receiving device, thereby being favorable to ensuring the process stability of wireless power supply to lighting lamp. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor under the premise of these drawings.

[0024] Figure 1 It is the multi-layer frame assembly drawing of the utility model;

[0025] Figure 2 It is the single-layer frame assembly drawing of the utility model;

[0026] Figure 3 It is the plan view of the utility model;

[0027] Figure 4The utility model discloses a circuit diagram about totem column drive circuit module, H bridge circuit module, LC oscillator module, overcurrent detection circuit module part in the utility model.

[0028] Figure 5 The utility model discloses a circuit diagram about power module, MCU main control unit, low voltage difference linear regulator (LDO), state indicating lamp module part in the utility model.

[0029] Reference signs:

[0030] 1, shelf, 2, lighting lamp, 3, wireless electric energy receiving device, 4, wireless electric energy transmitting device. Specific implementation

[0031] The embodiments of the utility model are described in detail below, the example of the embodiment is shown in the drawings, wherein the same or similar signs show the same or similar elements or elements with the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and can not be understood as the limitation of the utility model. In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and can not be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore can not be understood as the limitation of the utility model.

[0032] As Figures 1 to 5 The utility model discloses a refrigerator with wireless power supply lighting device, which comprises a shelf 1 installed in a refrigerator storage cabinet, and a lighting lamp 2 is installed on the shelf 1. In addition, a wireless electric energy receiving device 3 is installed on one side of the lighting lamp 2 and is electrically connected to the power input end of the lighting lamp 2, so as to transmit electric energy to the lighting lamp 2. On the other hand, a wireless electric energy transmitting device 4 is installed on the side wall of the refrigerator storage cabinet, which is used to send wireless electric energy to the wireless electric energy receiving device 3. Furthermore, a signal generating module is installed in the wireless electric energy receiving device 3, and a signal sensing switch is installed in the wireless electric energy transmitting device 4, which is used to trigger the wireless electric energy transmitting device 4 to send electric energy outward. When the wireless electric energy transmitting device 4 and the wireless electric energy receiving device 3 are close to each other, the signal generating module triggers the signal sensing switch.

[0033] It can be understood that the scheme of the present embodiment increases a wireless power receiving device 3 on the lighting lamp 2 of the internal shelf of the refrigerator, the wireless power receiving device 3 is electrically connected to the power access end of the lighting lamp 2 to transmit power to the lighting lamp 2, and at the same time, a wireless power transmitting device 4 for transmitting wireless power to the wireless power receiving device 3 is arranged on the side wall of the refrigerator storage cabinet, so that the wireless power transmitting device 4 transmits wireless power to the wireless power receiving device 3, thereby realizing wireless power supply for the lighting lamp 2. In addition, in order to ensure the stability of wireless power supply, the wireless power receiving device 3 is provided with a signal generating module, and the wireless power transmitting device 4 is provided with a signal sensing switch for triggering the wireless power transmitting device 4 to transmit power to the outside. When the wireless power transmitting device 4 and the wireless power receiving device 3 are close to each other, the signal generating module triggers the signal sensing switch, and the signal sensing switch further triggers the wireless power transmitting device 4 to transmit wireless power to the wireless power receiving device 3. Therefore, the wireless power transmitting device 4 can detect whether the wireless power receiving device 3 is in the correct power supply position through the signal sensing switch, so as to ensure that the wireless power transmitting device 4 will transmit wireless power to the wireless power receiving device 3 only when the wireless power receiving device 3 is in the correct power supply position, otherwise the wireless power transmitting device 4 will not transmit wireless power to the wireless power receiving device 3, thereby facilitating to ensure the stability of the process of wireless power supply for the lighting lamp. Therefore, the refrigerator with wireless power supply lighting device of the present application can supply power to the lighting lamp of the internal shelf of the refrigerator through wireless power supply, reduce the difficulty of circuit wiring in the refrigerator, make the installation of the refrigerator more convenient, and effectively avoid the damage of the lighting lamp lead during disassembly and maintenance of the refrigerator.

[0034] In the present embodiment, the signal generating module is a magnet, and the signal sensing switch is a Hall sensor. The Hall sensor triggers the wireless power transmitting device 4 to transmit power to the outside after detecting the magnetic field of the magnet. Therefore, when the wireless power receiving device 3 of the internal shelf of the refrigerator is close to the correct installation position of the wireless power transmitting device 4, the Hall sensor will trigger the wireless power transmitting device 4 to transmit wireless power to the wireless power receiving device 3 due to the detection of the uniform magnetic field of the magnet, otherwise the wireless power transmitting device 4 will not transmit wireless power to the wireless power receiving device 3, thereby facilitating to ensure the stability of the process of wireless power supply for the lighting lamp.

[0035] In the embodiment, the lighting lamp 2 is installed at the side of the shelf 1, and the light side of the lighting lamp 2 is directed to the bearing space inside the shelf 1, so that the light can illuminate the bearing space inside the shelf 1 to a certain extent, and the light can not be too dazzling to the user, and the eyes can be protected, and the light can also ensure the illumination effect on the bearing space inside the shelf 1. In addition, in order to provide sufficient illumination range for the bearing space inside the shelf 1, the illumination angle of the light side of the lighting lamp 2 is 120 degrees, and the lighting lamp 2 is a strip-shaped lamp, which extends along the side of the shelf 1, so that the lamp tube can cover the bearing space inside the shelf 1 as much as possible.

[0036] In the embodiment, as for the wireless power transmitting device 4, the internal circuit of the wireless power transmitting device 4 includes a power supply module, an MCU host U3, a totem pole driving circuit module, an H-bridge circuit module, and an LC oscillator module. The power supply module provides direct current power supply for the MCU host U3. A Hall sensor is connected to the MCU host U3. The Hall sensor triggers the MCU host U3 to output a PWM signal after detecting the magnetic field of a magnet. The signal input end of the totem pole driving circuit module is connected to the PWM output end of the MCU host U3. The signal output end of the totem pole driving circuit module is connected to the signal input end of the H-bridge circuit module to amplify and drive the H-bridge circuit module. The signal output end of the H-bridge circuit module is connected to the signal input end of the LC oscillator module to control the LC oscillator module to generate a high-frequency oscillation signal and transmit wireless power to the wireless power receiving device 3. On the other hand, the wireless power receiving device 3 is internally provided with a resonance circuit (not shown in the figure), and the wireless power receiving device 3 receives wireless power from the LC oscillator module through the resonance circuit. In addition, the wireless power transmitting module 4 further includes a low-dropout linear regulator (LDO), a status indicator lamp module, and an overcurrent detection circuit module. The low-dropout linear regulator (LDO) is connected to the power supply module to convert the high voltage of the power supply module into low voltage and supply power to the MCU host U3. The status indicator lamp module is connected to the control end of the MCU host U3. The overcurrent detection circuit module is connected to the LC oscillator module and the MCU host U3. The MCU host U3 detects whether the current of the LC oscillator module is abnormal through the overcurrent detection circuit module.

[0037] The power module includes a 12V DC power supply connected to the input end of the low dropout linear regulator (LDO) through the power line. After power-on, the low dropout linear regulator (LDO) provides 5V power supply for the MCU host U3, and the MCU host U3 starts to work and closes the PWM signal, and the indicator light flashes to indicate that there is no power transmission. When the wireless power receiving device 3 is close to the wireless power transmitting module 4, the Hall sensor senses the magnet in the wireless power receiving device 3 and transmits the signal to the MCU host U3. After receiving the signal, the MCU host U3 immediately outputs the PWM signal to drive the totem pole drive circuit module, and then drives the H-bridge circuit module to control the LC oscillator module to generate a high-frequency oscillation signal and send wireless power to the wireless power receiving device 3. During power transmission, the MCU host U3 monitors the voltage and current of the LC oscillator module and whether the receiver exists through the overcurrent detection circuit module and the Hall sensor, and if there is an abnormality, it immediately stops power transmission and controls the indicator light to flash.

[0038] Specifically, the number of totem pole drive circuit modules is four; the left upper arm, the right upper arm, the left lower arm, and the right lower arm of the H-bridge circuit module are respectively driven by each totem pole drive circuit module; the signal output ends of the upper arm and the lower arm of the H-bridge circuit module are respectively provided with P-MOS tubes and N-MOS tubes, and the P-MOS tubes and the N-MOS tubes are respectively connected to the signal input end of the LC oscillator module to control the LC oscillation circuit module to generate a resonant frequency. The PWM output end of the MCU host U3 is connected to the input end of the H-bridge circuit module through the totem pole drive circuit module composed of resistors and transistors. The LC oscillator module includes inductors (L1) and capacitors (C1, C2, C3, C4) for generating a high-frequency oscillation signal to generate wireless power externally. The overcurrent detection circuit includes resistors (R43, R44, R45) and a Hall sensor (U8) for detecting whether the current of the LC oscillator module is abnormal. The status indicator light module is connected to the output end of the MCU host U3 through the resistor (R24) for displaying the state of the entire circuit system.

[0039] Specifically, in the circuit of the Hall sensor, the VCC(+) pin of the Hall sensor U8 is directly connected to the +5V power supply to provide the required voltage for its normal work; and the GND(-) pin is connected to the ground (GND) to ensure that the circuit has a stable reference potential. The OUTPUT pin of the Hall sensor U8 is connected to pin 5 of the MCU host U3 through a resistor R45 to convert the detected magnetic field change into a voltage signal and input to the MCU host U3 to trigger the MCU host U3, and the resistor R45 is used to optimize the signal output.

[0040] Specifically, in the circuit of low dropout linear regulator (LDO), the input voltage of +12V is connected to the VIN pin of LDO regulator U5 through diode D9 to prevent reverse current with diode D9, and is connected to decoupling capacitor C6 for filtering high-frequency noise in the input voltage. Then, the internal circuit of LDO regulator U5 reduces and stabilizes the voltage of 12V to 5V, and then outputs from the VOUT pin to the pins 8 and 9 of MCU host U3. At the VOUT output end of LDO regulator U5, another decoupling capacitor C7 is connected between VOUT and the ground terminal of LDO regulator U5 to ensure the stability of the output voltage. Finally, the stable 5V voltage is supplied to the MCU.

[0041] Specifically, in the circuit of status indicator light module, it is composed of LED1 and resistor R24 in series, LED1 as a light-emitting diode, used to display the working state of the circuit, the anode of LED1 is connected to +5V power supply through R24, and the cathode of LED1 is connected to pin 20 of MCU host U3. When the power is turned on, the current flows through LED1, making it emit light. Resistor R24 as a current-limiting element, is connected in series between LED1 and the power supply, effectively limiting the current through the LED, preventing it from being damaged due to excessive current. +5V power supply provides stable power for the entire circuit, ensuring that LED1 can work normally. The entire circuit realizes the function of status indication through simple series connection.

[0042] Specifically, the totem pole driving circuit module for driving the left upper arm of the H-bridge circuit module specifically includes resistors R3, R9, R10, R11, transistors Q2, Q3, Q4, and diode D5. Among them, the base of Q3 and the anode of D5 are connected in parallel to the PWM output end BL of MCU host U3 through R3 and R11 respectively; the collector of Q3 is directly connected to the base of Q4, and is connected to +12V power supply through R9, R9 is connected in series between the collector of Q3 and the collector of Q4, and the emitter of Q3 is grounded; the collector of Q4 is directly connected to +12V power supply, and the emitter of Q4 is connected to the collector of Q2; the collector of Q2 and the emitter of Q4 are commonly connected to pin 4 of P-MOS tube, and the emitter of Q2 is grounded; the cathode of D5 is connected to the base of Q2 and is connected to the emitter of Q2 through R10, and is commonly grounded with the emitter of Q2. Through the above circuit structure, when the PWM output end BL of MCU host U3 sends a signal, the signal flows into the base of Q3 through R3, making Q3 conductive, then the current flows from +12V power supply into the base of Q4 through R9 to make Q4 also conductive, at this time the current can flow from the emitter of Q4 into pin 4 of P-MOS tube to drive the left upper arm of H-bridge circuit module. Diode D5 ensures that when the load generates a reverse current, the circuit can be quickly cut off to protect other elements from damage.

[0043] Specifically, the totem pole driving circuit module driving the right upper arm of the H-bridge circuit module specifically comprises resistors R6, R17, R18, R19, transistors Q8, Q9, Q10, and diode D7. The base of Q9 and the anode of D7 are connected in parallel to the PWM output end AL of the MCU host U3 through R17 and R19 respectively; the collector of Q9 is directly connected to the base of Q10 and connected to the +12V power supply through R16, R16 being connected in series between the collector of Q9 and the collector of Q10, the emitter of Q9 being grounded; the collector of Q10 is directly connected to the +12V power supply, the emitter of Q10 being connected to the collector of Q8; the collector of Q8 and the emitter of Q10 are commonly connected to the pin 2 of the P-MOS tube, the emitter of Q8 being grounded; the cathode of D7 is connected to the base of Q8 and connected to the emitter of Q8 through R18, being commonly grounded with the emitter of Q8. Through the above circuit structure, when the PWM output end AL of the MCU host U3 sends out a signal, the signal flows into the base of Q9 through R17, making Q9 conductive, then current flows from the +12V power supply into the base of Q10 through R16, so that Q10 is also conductive, at this time, current can flow from the emitter of Q10 into the pin 2 of the P-MOS tube, driving the right upper arm of the H-bridge circuit module. Diode D7 ensures that when the load generates a reverse current, the circuit can be quickly cut off to protect other elements from being damaged.

[0044] Specifically, the totem pole driving circuit module driving the left lower arm of the H-bridge circuit module specifically comprises resistors R12, R13, R14, R15, transistors Q5, Q6, Q7, and diode D6. The base of Q6 and the anode of D6 are connected in parallel to the PWM output end AH of the MCU host U3 through R13 and R15 respectively; the collector of Q6 is directly connected to the base of Q7 and connected to the +12V power supply through R12, R12 being connected in series between the collector of Q6 and the collector of Q7, the emitter of Q6 being grounded; the collector of Q7 is directly connected to the +12V power supply, the emitter of Q7 being connected to the collector of Q5; the collector of Q5 and the emitter of Q7 are commonly connected to the pin 2 of the N-MOS tube, the emitter of Q5 being grounded; the cathode of D6 is connected to the base of Q5 and connected to the emitter of Q5 through R14, being commonly grounded with the emitter of Q5. Through the above circuit structure, when the PWM output end AH of the MCU host U3 sends out a signal, the signal flows into the base of Q6 through R13, making Q6 conductive, then current flows from the +12V power supply into the base of Q7 through R12, so that Q7 is also conductive, at this time, current can flow from the emitter of Q7 into the pin 2 of the N-MOS tube, driving the left lower arm of the H-bridge circuit module. Diode D6 ensures that when the load generates a reverse current, the circuit can be quickly cut off to protect other elements from being damaged.

[0045] Specifically, the totem pole drive circuit module driving the right lower arm of the H-bridge circuit module specifically comprises: resistors R20, R21, R22, R23, transistors Q11, Q12, Q13, and diode D8. Wherein, the base of Q12 and the anode of D8 are connected in parallel to the PWM output end BH of the MCU host U3 through R21 and R23 respectively; the collector of Q12 is directly connected to the base of Q13, and is connected to the +12V power supply through R20, R20 being connected in series between the collector of Q12 and the collector of Q13, the emitter of Q12 being grounded; the collector of Q13 is directly connected to the +12V power supply, the emitter of Q13 being connected to the collector of Q11; the collector of Q11 and the emitter of Q13 are commonly connected to pin 4 of the N-MOS tube, the emitter of Q11 being grounded; the cathode of D8 is connected to the base of Q11 and is connected to the emitter of Q11 through R22, being commonly grounded with the emitter of Q11. Through the above circuit structure, when the PWM output end BH of the MCU host U3 sends out a signal, the signal flows into the base of Q12 through R21, making Q12 conductive, then current flows from the +12V power supply into the base of Q13 through R20, so that Q13 is also conductive, at this time the current can flow from the emitter of Q13 into pin 4 of the N-MOS tube, driving the right lower arm of the H-bridge circuit module. Diode D8 ensures that when the load generates a reverse current, the circuit can be quickly cut off to protect other elements from damage.

[0046] Specifically, in the H-bridge circuit module, the upper arm of the H-bridge circuit comprises P-MOS tube U1, diodes D1 and D2, capacitor C5, resistors R1 and R2, the P-MOS tube U1 is responsible for controlling the upper arm of the H-bridge circuit, the pin 3 of the P-MOS tube U1 is externally connected to a +12V power supply; D2 is connected in parallel with R2 and one end is commonly externally connected to the +12V power supply, the other end is connected to the pin 4 of the P-MOS tube U1, more specifically, the anode and cathode of D2 are connected to the +12V power supply and the pin 4 of the P-MOS tube U1 respectively; D1 is connected in parallel with R1 and one end is commonly externally connected to the +12V power supply, the other end is connected to the pin 2 of the P-MOS tube U1, more specifically, the anode and cathode of D1 are connected to the +12V power supply and the pin 2 of the P-MOS tube U1 respectively; the pin 1 of the P-MOS tube U1, the anode of D1, R1, R2 and the anode of D2 are commonly connected to the ground through the capacitor C5; the circuit between the pin 4 of the P-MOS tube U1 and R2 is externally connected to the emitter of Q4, the circuit between the pin 2 of the P-MOS tube U1 and R1 is externally connected to the emitter of Q10, so that the totem pole drive circuit module can send stable control signals to the P-MOS tube U1. In addition, the LC oscillator module is connected to the output end of the P-MOS tube U1, so that the LC oscillator can be started by the P-MOS tube U1. In the above circuit, the D2, R2, R1 and D1 commonly constitute an input protection circuit, which effectively prevents reverse voltage and overcurrent. On the other hand, in the H-bridge circuit module, the lower arm of the H-bridge circuit comprises N-MOS tube U2, diodes D3 and D4, resistors R5 and R6, the N-MOS tube U2 is responsible for controlling the lower arm of the H-bridge circuit, the pin 3 of the N-MOS tube U2 is connected to the overcurrent detection circuit module; D4 is connected in parallel with R5 and one end is commonly connected to the overcurrent detection circuit module, the other end is connected to the pin 2 of the N-MOS tube U2, more specifically, the anode and cathode of D4 are connected to the overcurrent detection circuit module and the pin 2 of the N-MOS tube U2 respectively; D3 is connected in parallel with R6 and one end is commonly connected to the overcurrent detection circuit module, the other end is commonly connected to the pin 4 of the N-MOS tube U2, more specifically, the anode and cathode of D3 are connected to the overcurrent detection circuit module and the pin 4 of the N-MOS tube U2 respectively; and the pin 1 of the N-MOS tube U2, the anode of D4, R1, R2 and the anode of D3 are commonly connected to the overcurrent detection circuit module; the circuit between the pin 2 of the N-MOS tube U2 and R5 is externally connected to the emitter of Q7, the circuit between the pin 4 of the N-MOS tube U2 and R6 is externally connected to the emitter of Q13, so that the totem pole drive circuit module can send stable control signals to the N-MOS tube U2. In addition, the LC oscillator module is connected to the output end of the N-MOS tube U2, so that the LC oscillator can be started by the N-MOS tube U2. In the above circuit, the D4, R5, R6 and D3 commonly constitute an input protection circuit, which effectively prevents reverse voltage and overcurrent.

[0047] Specifically, in the circuit of the LC oscillator module, capacitors C1, C2, C3, and C4 are included, and an inductor L1 is included, a resonant loop of an oscillator is formed by connecting the capacitor array formed by C1, C2, C3, and C4 in parallel with the inductor L1 in series, and the pin 5, the pin 6, the pin 7, and the pin 8 of the P-MOS tube U1 are used as output terminals and are connected in parallel with the above-mentioned resonant loop, and similarly, the pin 5, the pin 6, the pin 7, and the pin 8 of the N-MOS tube U2 are used as output terminals and are connected in parallel with the above-mentioned resonant loop, wherein the circuit between the inductor L1 and C4 is connected to a Data output terminal outside, for outputting a stable oscillation signal. Therefore, the P-MOS tube U1 and the N-MOS tube U2 can be used to control the LC oscillator module to generate a high-frequency oscillation signal and transmit wireless power to the wireless power receiving device 3.

[0048] Specifically, in the circuit of the overcurrent detection circuit module, resistors R43 and R44 and a capacitor C8 are included, one end of R43 is connected to the pin 3 of the N-MOS tube U2, and the other end is grounded, one end of R44 is connected to the circuit between R43 and the pin 3 of the N-MOS tube U2, and the other end forms a detection node overload, which is connected to the pin 17 of the MCU host U3, and the circuit between R44 and the detection node overload is grounded through the capacitor C8.

[0049] In the above-mentioned circuit, R43 can monitor the current change, when the current flows through R43, a voltage drop proportional to the current is generated, one end of R43 is grounded, and the other end is connected to the resistor R44 to form a voltage dividing point, and the resistor R44 is connected in series with R43 to jointly act on the detection node overload. The capacitor C8 is connected in parallel between the detection node overload of R44 and the ground, and the main function is to filter out noise and ensure that the detected voltage signal is stable and reliable. Through the above-mentioned circuit, the MCU host U3 can detect whether the voltage and current of the LC oscillator module are abnormal through the detection node overload, for example, when the current in the circuit exceeds the set threshold, the voltage drop on R43 will increase, causing the voltage at the node connected by R44 and C8 to change, and the MCU host U3 can trigger the stop of the work of the wireless power transmitting device 4 according to the change, to ensure the protection of the circuit system.

[0050] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not limited to; although the present application is described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still be modified to the technical solutions recorded in the foregoing examples, or part of the technical features are replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A refrigerator with a wirelessly powered lighting device, comprising a shelf (1) disposed within the refrigerator's storage compartment, characterized in that, The shelf (1) is provided with a lighting lamp (2), the lighting lamp (2) is equipped with a wireless power receiving device (3), and the wireless power receiving device (3) is electrically connected to the power input terminal of the lighting lamp (2) to transmit power to the lighting lamp (2). The side wall of the refrigerator cabinet is provided with a wireless power transmitting device (4) for transmitting wireless power to the wireless power receiving device (3). The wireless power receiving device (3) is equipped with a signal generating module; the wireless power transmitting device (4) is equipped with a signal sensing switch for triggering the wireless power transmitting device (4) to transmit electrical energy to the outside. When the wireless power transmitting device (4) and the wireless power receiving device (3) come close to each other, the signal generating module triggers the signal sensing switch.

2. The refrigerator with a wireless power supply lighting device according to claim 1, characterized in that, The signal generating module is a magnet, and the signal sensing switch is a Hall sensor; After the Hall sensor detects the magnetic field of the magnet, it triggers the wireless power transmitting device (4) to send out electrical energy.

3. The refrigerator with a wireless power supply lighting device according to claim 1, characterized in that, The lighting lamp (2) is located on the side of the shelf (1) and the light-emitting side faces the load-bearing space inside the shelf (1).

4. The refrigerator with a wireless power supply lighting device according to claim 3, characterized in that, The illumination angle of the light-emitting side of the lighting lamp (2) is 120 degrees.

5. The refrigerator with a wirelessly powered lighting device according to claim 3, characterized in that, The lighting (2) is a strip light and extends along the side of the shelf (1).

6. The refrigerator with a wirelessly powered lighting device according to claim 2, characterized in that, The wireless power transmitting device (4) includes a power supply module, an MCU main controller, a totem pole drive circuit module, an H-bridge circuit module, and an LC oscillator module; The power supply module provides DC power to the MCU main controller. The Hall sensor is connected to the MCU main controller. After the Hall sensor detects the magnetic field of the magnet, it triggers the MCU main controller to output a PWM signal. The signal input terminal of the totem pole drive circuit module is connected to the PWM output terminal of the MCU main controller. The signal output terminal of the totem pole drive circuit module is connected to the signal input terminal of the H-bridge circuit module to amplify and drive the H-bridge circuit module. The signal output terminal of the H-bridge circuit module is connected to the signal input terminal of the LC oscillator module to control the LC oscillator module to generate a high-frequency oscillation signal and transmit wireless power to the wireless power receiving device (3). The wireless power receiving device (3) is equipped with a resonant circuit, and the wireless power receiving device (3) receives wireless power from the LC oscillator module through the resonant circuit.

7. The refrigerator with a wirelessly powered lighting device according to claim 6, characterized in that, The wireless power transmitting device (4) further includes a low-dropout linear regulator (LDO), which is connected to the power module to convert the high voltage of the power module to a low voltage and power the MCU main controller.

8. The refrigerator with a wirelessly powered lighting device according to claim 6, characterized in that, The wireless power transmitting device (4) also includes a status indicator module, which is connected to the control terminal of the MCU main controller.

9. The refrigerator with a wirelessly powered lighting device according to claim 6, characterized in that, The wireless power transmitting device (4) also includes an overcurrent detection circuit module, which is connected to the LC oscillator module and the MCU main controller. The MCU main controller detects whether the current of the LC oscillator module is abnormal through the overcurrent detection circuit module.

10. The refrigerator with a wirelessly powered lighting device according to claim 6, characterized in that, The totem pole drive circuit module has four modules. The upper left arm, upper right arm, lower left arm, and lower right arm of the H-bridge circuit module are respectively driven by each of the totem pole driving circuit modules. The upper and lower arms of the H-bridge circuit module are respectively equipped with P-MOS transistors and N-MOS transistors. The P-MOS transistors and N-MOS transistors are respectively connected to the signal input terminals of the LC oscillator module to control the LC oscillator circuit module to generate a resonant frequency.

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