Household appliance and power grid voltage monitoring device thereof

Abstract

The utility model discloses a household electrical appliance and a power grid voltage monitoring device thereof. The monitoring device comprises a power grid terminal, a power supply management circuit, a rechargeable battery, a power grid voltage acquisition circuit, a controller and a storage module. The power grid terminal is connected with a power grid; the power management circuit is used for converting power grid alternating current into direct current which is used for supplying power to the monitoring device. The rechargeable battery is used for receiving and storing the direct current and is used for supplying power to the monitoring device; the power grid voltage acquisition circuit is used for acquiring power grid voltage information; the controller is used for receiving the power grid voltage information and storing the power grid voltage information to the storage module; the storage module is used for receiving and storing the power grid voltage information. Therefore, the power grid voltage monitoring device can monitor the power grid voltage in real time and store the power grid voltage in the storage module, can supply power through the power grid and can also supply power through the rechargeable battery, so that the power grid voltage can be monitored even in the case of power failure, and complete power grid voltage fluctuation data can be obtained.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, and specifically relates to a household appliance and a power grid voltage monitoring device thereof. Background Art

[0002] In some remote mountainous areas or underdeveloped areas abroad, such as India, Pakistan, etc., the power grid voltage fluctuates greatly, and power outages often occur. The voltage fluctuation is even greater at the moment of power supply, which causes the refrigerator computer board to be greatly impacted by the peak voltage, greatly increasing the defective rate. Therefore, improving the defective rate is an inevitable problem to be solved. The existing solutions basically increase the voltage withstand level of the computer board components. This not only increases the cost, but also does not record the fluctuation parameters of the power grid voltage in detail, and blindly increasing the voltage withstand level is not targeted.

[0003] The data of the power grid voltage at the moment of power outage and power supply is more meaningful for the research of improving product performance. Therefore, how to obtain the voltage data of the power grid at the moment of power outage and power supply for household appliances is an urgent technical problem to be solved, so as to provide the most direct data support for improving the defective rate.

[0004] The above information disclosed in this background art is only used to increase the understanding of the background art of this application. Therefore, it may include prior art that is not known to those of ordinary skill in the art. Summary of the Invention

[0005] The utility model provides a household appliance and a power grid voltage monitoring device thereof, which solve the technical problem that the existing household appliances cannot obtain the voltage data during power grid fluctuations, power outage and power supply, resulting in a high defective rate of household appliances.

[0006] To achieve the above-mentioned utility model / design purpose, the utility model adopts the following technical solutions:

[0007] A power grid voltage monitoring device for a household appliance, the device includes:

[0008] A power grid terminal, used to connect to the power grid;

[0009] A power management circuit, used to convert the grid alternating current into direct current, and the direct current is used to supply power to the monitoring device;

[0010] A rechargeable battery, used to receive and store the direct current, and the rechargeable battery is used to supply power to the monitoring device;

[0011] A power grid voltage acquisition circuit, used to acquire power grid voltage information;

[0012] A controller, used to receive the power grid voltage information and store the power grid voltage information into a storage module;

[0013] A storage module for receiving and storing the grid voltage information.

[0014] For the household appliance grid voltage monitoring device as described above, a switching circuit is provided between the rechargeable battery and the grid voltage monitoring device. When there is power in the grid voltage, the switching circuit is disconnected. When the grid voltage loses power, the switching circuit is closed.

[0015] For the household appliance grid voltage monitoring device as described above, a switching circuit is provided between the rechargeable battery and the grid voltage monitoring device, and the switching circuit includes a manual switch.

[0016] For the household appliance grid voltage monitoring device as described above, the controller is used to input a control signal to the switching circuit.

[0017] For the household appliance grid voltage monitoring device as described above, the switching circuit includes at least one transistor.

[0018] For the household appliance grid voltage monitoring device as described above, the switching circuit includes a triode and a MOS transistor, and the controller outputs a control signal to the triode.

[0019] For the household appliance grid voltage monitoring device as described above, the switching circuit includes a first switch, a triode and a MOS transistor. The first switch is respectively connected to the rechargeable battery and the base of the triode. The collector of the triode is connected to the gate of the MOS transistor. The emitter of the triode is grounded. The drain and source of the MOS transistor are respectively connected to the rechargeable battery and the electrical appliance components of the monitoring device, and the controller outputs a control signal to the base of the triode.

[0020] For the household appliance grid voltage monitoring device as described above, the device includes a signal amplification circuit, and the signal amplification circuit is used to receive the grid voltage information collected by the grid voltage acquisition circuit and send it to the controller after amplification.

[0021] For the household appliance grid voltage monitoring device as described above, the monitoring device includes a first diode and a second diode connected in series. The grid voltage acquisition circuit is connected between the first diode and the second diode. The negative electrode of the first diode is connected to the power supply, the positive electrode of the second diode is grounded, and the first diode and the second diode are connected to the controller through a resistor.

[0022] A household appliance, which includes the above-mentioned grid voltage monitoring device.

[0023] Compared with the prior art, the advantages and positive effects of the present utility model are as follows: A household electrical appliance power grid voltage monitoring device includes a power grid terminal, a power management circuit, a rechargeable battery, a power grid voltage acquisition circuit, a controller, and a storage module. The power grid terminal is used to connect to the power grid; the power management circuit is used to convert the power grid alternating current into direct current, and the direct current is used to supply power to the monitoring device; the rechargeable battery is used to receive and store the direct current, and the rechargeable battery is used to supply power to the monitoring device; the power grid voltage acquisition circuit is used to acquire power grid voltage information; the controller is used to receive the power grid voltage information and store the power grid voltage information into the storage module; the storage module is used to receive and store the power grid voltage information. Therefore, the present utility model can monitor the power grid voltage in real time and store it into the storage module, and can be powered by the power grid or by the rechargeable battery. Therefore, even during a power outage, the power grid voltage can be monitored to obtain complete power grid voltage fluctuation data.

[0024] A household electrical appliance includes a power grid voltage monitoring device, and the power grid voltage monitoring device includes a power grid terminal, a power management circuit, a rechargeable battery, a power grid voltage acquisition circuit, a controller, and a storage module. The power grid terminal is used to connect to the power grid; the power management circuit is used to convert the power grid alternating current into direct current, and the direct current is used to supply power to the monitoring device; the rechargeable battery is used to receive and store the direct current, and the rechargeable battery is used to supply power to the monitoring device; the power grid voltage acquisition circuit is used to acquire power grid voltage information; the controller is used to receive the power grid voltage information and store the power grid voltage information into the storage module; the storage module is used to receive and store the power grid voltage information. Therefore, the present utility model can monitor the power grid voltage in real time and store it into the storage module, and can be powered by the power grid or by the rechargeable battery. Therefore, even during a power outage, the power grid voltage can be monitored to obtain complete power grid voltage fluctuation data.

[0025] After reading the specific embodiments of the present utility model in conjunction with the accompanying drawings, other features and advantages of the present utility model will become clearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 is the principle block diagram of a specific embodiment of the present utility model.

[0028] Figure 2 is the principle block diagram of a specific embodiment of the present utility model.

[0029] Figure 3It is the circuit diagram of the power management circuit and the rechargeable battery in the specific embodiment of the present utility model.

[0030] Figure 4 It is the circuit diagram of the grid voltage acquisition circuit in the specific embodiment of the present utility model.

[0031] Figure 5 It is the circuit diagram of the switch circuit in the specific embodiment of the present utility model.

[0032] Figure 6 It is the circuit diagram of the controller in the specific embodiment of the present utility model.

[0033] Figure 7 It is the circuit diagram of the storage module in the specific embodiment of the present utility model. Specific Embodiments

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0035] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the present utility model.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. In the description of the embodiments, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0037] The terms "first" and "second" are only used for descriptive purposes and cannot be understood 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 such features.

[0038] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0039] In order to understand the power consumption environment of household appliances, so as to improve the performance of household appliances according to the power consumption environment, better adapt to the power consumption environment, and reduce the defective rate of household appliances, a household appliance and its grid voltage monitoring device are proposed, which can monitor and store the relevant grid voltage information of the power consumption environment of household appliances, so as to facilitate R & D personnel to prompt the performance of household appliances.

[0040] Among them, the household appliance can be a household appliance using alternating current such as a refrigerator, a washing machine, an air conditioner, a television, etc.

[0041] In Figure 1 the example of, the household appliance grid voltage monitoring device includes a grid terminal, a power management circuit, a rechargeable battery, a grid voltage acquisition circuit, a signal amplification circuit, a controller and a storage module.

[0042] The grid terminal is used to connect to the grid, and the grid terminal CN1 connects the live wire L and the neutral wire N.

[0043] The power management circuit is used to convert grid alternating current into direct current. The direct current is used to supply power to the monitoring device and also to supply power to the rechargeable battery.

[0044] The rechargeable battery is used to receive and store direct current, and the rechargeable battery is used to supply power to the monitoring device.

[0045] That is to say, the electrical appliances of the monitoring device can be powered by alternating current or by the rechargeable battery, which can avoid the problem that the monitoring device cannot work during a power outage.

[0046] In Figure 3 the example of, the power management circuit includes a fuse FUSE1, a varistor RV1, an X capacitor CX1, an X capacitor CX2, a rectifier diode D3, a rectifier diode D4, a power management chip IC1, and a voltage regulator chip IC2.

[0047] The industrial frequency mains passes through the fuse FUSE1, the varistor, and the capacitor filtering, and then completes half-wave rectification through the rectifier diodes D3 and D4.

[0048] The fuse FUSE1 is connected to the live wire L.

[0049] The varistor RV1 is connected between the live wire L and the neutral wire N. The voltage at the varistor RV1 is L1.

[0050] The capacitors CX1 and CX2 are connected in series between the live wire L and the neutral wire N.

[0051] The voltage of L1 is connected to the neutral line N after passing through the resistor R3, the rectifying diode D4, the rectifying diode D3, the capacitor E1, and the capacitor E4. A +310V voltage is formed between the rectifying diode D3 and the capacitor E1, and the +310V voltage is connected to the power management chip IC1.

[0052] The power management chip IC1 and its peripheral circuit convert the voltage into a +12V voltage. The +12V voltage generates a stable +5V voltage through a voltage stabilizing chip. The +5V voltage supplies power to the monitoring device on the one hand and charges the rechargeable battery on the other hand.

[0053] The grid voltage acquisition circuit is used to acquire grid voltage information and send the grid voltage information to the controller IC4.

[0054] The signal amplification circuit is used to receive the grid voltage information acquired by the grid voltage acquisition circuit, amplify it, and then send it to the controller IC4.

[0055] The grid voltage acquisition circuit includes the diode D6, the diode D7, the resistor R8, the resistor R19, the resistor R58, the resistor R59, and the resistor R23.

[0056] The positive electrode of the diode D6 is connected to the live wire L, the negative electrode of the diode D6 is connected to the positive electrode of the diode D7, and the negative electrode of the diode D7 is sequentially connected to the resistor R8, the resistor R19, the resistor R58, the resistor R59, and the resistor R23, and then connected to the neutral line N and the ground GND.

[0057] The monitoring device includes a series-connected first diode D8 and second diode D9. The grid voltage acquisition circuit is connected between the first diode D8 and the second diode D9. The negative electrode of the first diode D8 is connected to the power supply, the positive electrode of the second diode D9 is grounded, and the controller IC4 is connected between the first diode D8 and the second diode D9 through the resistor R20.

[0058] The positive electrode of the diode D8 and the negative electrode of the diode D9 are connected between the resistor R59 and the resistor R23. The negative electrode of the diode D8 is connected to +5V, and the positive electrode of the diode D9 is grounded GND. The controller IC4 is connected between the resistor R59 and the resistor R23 through the resistor R20.

[0059] The signal amplification circuit includes an operational amplifier IC3.

[0060] The negative input terminal of the operational amplifier IC3 is connected between the resistor R59 and the resistor R23. The positive input terminal of the operational amplifier IC3 inputs a reference voltage divided by the resistors R24 and R25.

[0061] The output terminal of the operational amplifier IC3 is connected to +5V through the resistor R5, and the output terminal of the operational amplifier IC3 is connected to the controller IC4 through the resistor R6.

[0062] After being divided by a voltage-dividing resistor, the grid voltage is reduced to the acquisition range of the controller IC4, and then amplified by an operational amplifier for the controller IC4 to acquire.

[0063] The controller IC4 is used to receive the grid voltage information and store the grid voltage information into the storage module.

[0064] The circuit diagram of the controller IC4 is as Figure 6 shown.

[0065] The storage module is used to receive and store the grid voltage information.

[0066] In some embodiments, the storage module is a memory card, for example: SD memory card IC10.

[0067] The circuit diagram of the storage module is as Figure 7 shown. SS, MOSI, SCK, and MISO are the read / write signals of the memory card, and the controller IC4 writes the acquired data into the SD memory card IC10.

[0068] In Figure 2 the example, a switch circuit is provided between the rechargeable battery and the grid voltage monitoring device. When the grid voltage is powered on, the switch circuit is disconnected; when the grid voltage is powered off, the switch circuit is closed.

[0069] The controller IC4 is used to input a control signal to the switch circuit.

[0070] The switch circuit includes at least one transistor.

[0071] The switch circuit includes a first switch, a triode N7, and a MOS transistor P7. The first switch is respectively connected to the rechargeable battery and the base of the triode N7. The collector of the triode N7 is connected to the gate of the MOS transistor P7. The emitter of the triode N7 is grounded. The drain and source of the MOS transistor P7 are respectively connected to the rechargeable battery and the +5V power supply terminal of the electrical appliance of the monitoring device. The controller IC4 outputs a control signal to the base of the triode N7.

[0072] The first switch is an electric switch and is a controlled switch. Its conduction and disconnection are controlled by the power supply and power-off of the grid voltage. The first switch can also be controlled to turn on and off by the controller.

[0073] In Figure 5In an example, when an electric switch is connected at the CN2 position, +5V-OUT is the voltage of the rechargeable battery. The first switch is connected between +5V-OUT and POWER KEY. When the grid voltage loses power, the first switch closes, the base of transistor N7 becomes high level, and transistor N7 conducts. At this time, the gate-source control voltage of MOS transistor P7 reaches the turn-on voltage, and MOS transistor P7 conducts to supply power to the subsequent circuit. At the same time, controller IC4 obtains voltage, takes over the control, raises the base voltage of transistor N7, and controller IC4 controls the first switch to disconnect. Since MOS transistor P7 conducts, the rechargeable battery voltage +5V-OUT still supplies power to the subsequent circuit. When the subsequent load is not working, controller IC4 lowers the base voltage of transistor N7, transistor N7 turns off, MOS transistor P7 turns off, and the entire voltage monitoring device powers off.

[0074] In some other embodiments, a switch circuit is provided between the rechargeable battery and the grid voltage monitoring device, and the switch circuit includes a manual switch.

[0075] The switch circuit includes a first switch, transistor N7, and MOS transistor P7. The first switch is respectively connected to the rechargeable battery and the base of transistor N7. The collector of transistor N7 is connected to the gate of MOS transistor P7. The emitter of transistor N7 is grounded. The drain and source of MOS transistor P7 are respectively connected to the rechargeable battery and the power supply terminal +5V of the electrical appliance of the monitoring device. Controller IC4 outputs a control signal to the base of transistor N7.

[0076] The conduction and disconnection of the first switch can be manually controlled.

[0077] In Figure 5 In an example, when a manual switch is connected at the CN2 position, +5V-OUT is the voltage of the rechargeable battery. The first switch is connected between +5V-OUT and POWER KEY. When the manual first switch is closed, the base of transistor N7 becomes high level, and transistor N7 conducts. At this time, the gate-source control voltage of MOS transistor P7 reaches the turn-on voltage, and MOS transistor P7 conducts to supply power to the subsequent circuit. At the same time, controller IC4 obtains voltage, takes over the control, raises the base voltage of transistor N7. After the first switch is closed for a period of time, the first switch can be manually controlled to disconnect. Since MOS transistor P7 conducts, the rechargeable battery voltage +5V-OUT still supplies power to the subsequent circuit. When the subsequent load is not working, controller IC4 lowers the base voltage of transistor N7, transistor N7 turns off, MOS transistor P7 turns off, and the entire voltage monitoring device powers off.

[0078] The household appliance power grid voltage monitoring device can accurately collect the power grid voltage for a long time. Even when the mains power is cut off, it can still collect and accurately record the relevant information, which is convenient for R & D personnel to analyze, conducive to improving the performance of household appliances in the later stage and reducing the defect rate.

[0079] The household appliance power grid voltage monitoring device can achieve uninterrupted collection of power grid data, intelligent switching of power supply methods, accurate collection and real-time storage of the collected data.

[0080] A household appliance, which includes the above-mentioned power grid voltage monitoring device.

[0081] Among them, the household appliance can be a household appliance that uses alternating current, such as a refrigerator, a washing machine, an air conditioner, a TV, etc.

[0082] When the household appliance is working, the power grid voltage supplies power to the household appliance, and the power grid voltage monitoring device monitors and stores the power grid voltage. When the power grid voltage is cut off, the power grid voltage monitoring device switches to the rechargeable battery for power supply. Therefore, the power grid voltage monitoring device can still monitor the voltage information when the power grid voltage is cut off and when the power grid voltage is powered on again and store it, and can accurately collect and store it in real time.

[0083] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, for those of ordinary skill in the art, it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; 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 required to be protected by the present invention.

Claims

1. A household appliance power grid voltage monitoring device, characterized in that, The device includes: A power grid terminal for connecting to the power grid; A power management circuit for converting the alternating current of the power grid into direct current, and the direct current is used to supply power to the monitoring device; A rechargeable battery for receiving and storing the direct current, and the rechargeable battery is used to supply power to the monitoring device; A power grid voltage acquisition circuit for acquiring power grid voltage information; A controller for receiving the power grid voltage information and storing the power grid voltage information in a storage module; A storage module for receiving and storing the power grid voltage information.

2. The household appliance grid voltage monitoring device according to claim 1, characterized in that A switch circuit is provided between the rechargeable battery and the power grid voltage monitoring device. When the power grid voltage is powered on, the switch circuit is disconnected. When the power grid voltage loses power, the switch circuit is closed.

3. The household electrical appliance grid voltage monitoring device according to claim 1, characterized in that A switch circuit is provided between the rechargeable battery and the power grid voltage monitoring device, and the switch circuit includes a manual switch.

4. The household electrical appliance grid voltage monitoring device according to claim 2 or 3, characterized in that, The controller is used to input a control signal to the switch circuit.

5. The household appliance grid voltage monitoring device according to claim 2 or 3, characterized in that, The switch circuit includes at least one transistor.

6. The household electrical appliance grid voltage monitoring device according to claim 5, characterized in that, The switch circuit includes a triode and a MOS transistor, and the controller outputs a control signal to the triode.

7. The household electrical appliance grid voltage monitoring device according to claim 6, wherein The switch circuit includes a first switch, a triode and a MOS transistor. The first switch is respectively connected to the rechargeable battery and the base of the triode. The collector of the triode is connected to the gate of the MOS transistor. The emitter of the triode is grounded. The drain and source of the MOS transistor are respectively connected to the rechargeable battery and the electrical appliance of the monitoring device, and the controller outputs a control signal to the base of the triode.

8. The household appliance power grid voltage monitoring device according to claim 1, characterized in that, The device includes a signal amplification circuit, and the signal amplification circuit is used to receive the power grid voltage information acquired by the power grid voltage acquisition circuit, amplify it and then send it to the controller.

9. The household electrical appliance grid voltage monitoring device according to claim 1, characterized in that, The monitoring device includes a first diode and a second diode connected in series. The power grid voltage acquisition circuit is connected between the first diode and the second diode. The negative electrode of the first diode is connected to the power supply, the positive electrode of the second diode is grounded, and the first diode and the second diode are connected to the controller through a resistor.

10. A household appliance, characterized in that, The household appliance includes the power grid voltage monitoring device according to any one of claims 1-9.

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