Pouring detection device and electrical appliance

Abstract

This application relates to a tipping detection device and an electrical appliance. The tipping detection device includes a control circuit, a warning device, and a sphere filled with a conductive liquid. The control circuit is connected to the sphere and the warning device. The control circuit obtains the electrical signal output by the sphere and outputs a corresponding control signal according to the electrical signal to control the operation of the warning device. The conductive liquid does not completely fill the sphere, and the electrical signal is determined by the placement posture of the sphere. In the above-mentioned tipping detection device, the conductive liquid does not completely fill the sphere. The sphere outputs a corresponding electrical signal to the control circuit according to its own placement posture, and then the control circuit outputs a control signal according to the obtained electrical signal to control the operation of the warning device. In this way, it is possible to judge whether the sphere is in the correct posture according to the working condition of the warning device, effectively avoid the occurrence of false triggering, and improve the control reliability.

Description

Technical Field

[0001] The present application relates to the technical field of tipping detection, and particularly to a tipping detection device and an electrical appliance. Background Art

[0002] With the continuous improvement of people's living standards, various electrical appliances have emerged. Some electrical appliances, such as desktop small fans, electric heating small suns, oxygen generators, etc., have requirements for the placement orientation. If they cannot be placed correctly according to the required orientation, it may cause product failures, and even lead to accidents such as electric leakage and fires, resulting in immeasurable losses.

[0003] Traditional tipping detection devices adopt the principle of photoelectric detection and are composed of a spherical bead and a relatively arranged light emitting end and light receiving end. When the device is in a normal posture, the spherical bead blocks the light path from the light emitting end to the light receiving end, and the light receiving end cannot receive the light signal emitted by the light emitting end; when the device is tilted or tipped over, the spherical bead deviates from the initial position as the device shakes and does not block the light path, and the light receiving end receives the light signal emitted by the light emitting end. However, realizing tipping protection through a mechanical switch is easily affected by external vibrations and may cause false triggering. Therefore, traditional tipping detection devices have the problem of poor control reliability. Summary of the Invention

[0004] Based on this, in view of the problem of poor control reliability of traditional tipping detection devices, it is necessary to provide a tipping detection device and an electrical appliance with good tipping control reliability to improve the control reliability of the tipping detection device.

[0005] A tipping detection device includes a control circuit, a warning device, and a sphere filled with a conductive liquid. The control circuit is connected to the sphere and the warning device; the control circuit obtains the electrical signal output by the sphere and outputs a corresponding control signal according to the electrical signal to control the operation of the warning device; the conductive liquid does not completely fill the sphere, and the electrical signal is determined by the placement posture of the sphere.

[0006] In one embodiment, the sphere includes a cavity and a protrusion provided on the surface of the cavity. The interior of the cavity and the protrusion is a connected cavity, and the cavity is filled with a conductive liquid, and the conductive liquid does not completely fill the cavity; the protrusion is connected to the control circuit.

[0007] In one embodiment, the cavity is grounded through an isolation resistor.

[0008] In one embodiment, the number of the protrusions is multiple, and the volume difference between the conductive liquid and the cavity can cause at least one protrusion to be separated from the conductive liquid.

[0009] In one embodiment, the control circuit includes a main control circuit and an alarm driving circuit. The main control circuit is connected to the sphere and the alarm driving circuit, and the alarm driving circuit is connected to the alarm device.

[0010] In one embodiment, the main control circuit includes a main control chip, a pull-up resistor, and a filter capacitor. The power supply terminal of the main control chip is connected to the power supply, the detection terminal of the main control chip is connected to the sphere, and the output terminal of the main control chip is connected to the alarm driving circuit; one end of the pull-up resistor is connected to the power supply, and the other end of the pull-up resistor is connected to the detection terminal of the main control chip; one end of the filter capacitor is connected to the power supply terminal of the main control chip, and the other end of the filter capacitor is grounded.

[0011] In one embodiment, the alarm device is a buzzer, and the alarm driving circuit includes a first driving resistor, a first switch, and a second driving resistor; one end of the first driving resistor is connected to the main control circuit, and the other end of the first driving resistor is connected to the control terminal of the first switch; the first end of the first switch is connected to the power supply through the second driving resistor, the second end of the first switch is grounded; the buzzer is connected in parallel with the second driving resistor.

[0012] In one embodiment, the alarm device includes a first indicator light and a second indicator light, and the alarm driving circuit includes a first indicator light driving circuit and a second indicator light driving circuit. The first indicator light driving circuit is connected to the main control circuit and the first indicator light, and the second indicator light driving circuit is connected to the main control circuit and the second indicator light.

[0013] In one embodiment, the first indicator light driving circuit includes a third driving resistor, a second switch, and a fourth driving resistor; one end of the third driving resistor is connected to the main control circuit, and the other end of the third driving resistor is connected to the control terminal of the second switch; the fourth driving resistor is connected in series with the first indicator light, the other end of the fourth driving resistor is connected to the power supply, and the other end of the first indicator light is connected to the first end of the second switch; the second end of the second switch is grounded.

[0014] In one embodiment, the second indicator light driving circuit includes a fifth driving resistor, a third switch, and a sixth driving resistor; one end of the fifth driving resistor is connected to the main control circuit, and the other end of the fifth driving resistor is connected to the control terminal of the third switch; the sixth driving resistor is connected in series with the second indicator light, the other end of the sixth driving resistor is connected to the power supply, and the other end of the second indicator light is connected to the first end of the third switch; the second end of the third switch is grounded.

[0015] An electrical appliance includes a body and the tipping detection device as described above provided in the body.

[0016] The above-mentioned dumping detection device includes a control circuit, a warning device, and a sphere filled with a conductive liquid. The conductive liquid does not completely fill the sphere. The sphere outputs corresponding electrical signals to the control circuit according to its own placement posture, and then the control circuit outputs a control signal according to the obtained electrical signals to control the operation of the warning device. In this way, it is possible to judge whether the sphere is in the correct posture according to the working condition of the warning device, effectively avoiding the occurrence of false triggering and improving the control reliability. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0018] Figure 1 It is a block diagram of the composition of the dumping detection device in an embodiment;

[0019] Figure 2 It is a schematic structural diagram of the sphere in an embodiment;

[0020] Figure 3 It is a schematic structural diagram of the sphere in another embodiment;

[0021] Figure 4 It is a block diagram of the composition of the dumping detection device in another embodiment;

[0022] Figure 5 It is a schematic structural diagram of the main control circuit in an embodiment;

[0023] Figure 6 It is a schematic structural diagram of the warning driving circuit and the warning device in an embodiment;

[0024] Figure 7 It is a schematic structural diagram of the first indicator light driving circuit and the first indicator light in an embodiment;

[0025] Figure 8 It is a schematic structural diagram of the second indicator light driving circuit and the second indicator light in an embodiment. Detailed Embodiments

[0026] To facilitate the understanding of the present application, the following will describe the present application more comprehensively with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0028] It can be understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.

[0029] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or connected to the other element through an intermediate element. In addition, in the following embodiments, "connection", if there is a transfer of electrical signals or data between the connected objects, should be understood as "electrical connection", "communication connection", etc.

[0030] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising", "including" or "having", etc. specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the related listed items.

[0031] In one embodiment, as Figure 1 shown, a dumping detection device is provided, which includes a control circuit 200, a warning device 300, and a sphere 100 filled with a conductive liquid. The control circuit 200 is connected to the sphere 100 and the warning device 200. The control circuit 200 acquires the electrical signal output by the sphere 100 and outputs a corresponding control signal according to the electrical signal to control the operation of the warning device 300. The conductive liquid does not completely fill the sphere 100, and the electrical signal is determined by the placement posture of the sphere 100.

[0032] Among them, the sphere 100 refers to a hollow insulator with a spherical shape. The control circuit 200 refers to a circuit structure with the ability to collect signals and output control signals. The warning device 300 can be a buzzer and / or an indicator light, and the number of the buzzer and / or the indicator light can be one or more.

[0033] Specifically, the sphere 100 includes a spherical outer shell and a cavity inside the spherical outer shell, and a conductive liquid is contained in the cavity. The fact that the conductive liquid does not completely fill the sphere 100 means that the volume of the conductive liquid is less than the volume of the cavity in the sphere 100. The conductive liquid can be connected to the control circuit 200 through a conductive sheet installed on the conductive part of the sphere 100, or a conductive material can be printed on the conductive part of the sphere 100 that needs to be electrically connected to the control circuit 200, so that the conductive liquid can be electrically connected to the control circuit 200 through the sphere 100.

[0034] Furthermore, the number of the conductive parts can be one or multiple. If the number of the conductive parts is one, then the conductive part is arranged directly above the sphere 100 in the preset correct placement posture. If the number of the conductive parts is multiple, then the conductive parts can be arranged according to a certain rule. For example, the first conductive part can be arranged directly above the sphere 100 in the preset correct placement posture, and the remaining conductive parts are symmetrically and evenly arranged at other positions of the sphere 100 with the first conductive part as the center. Here, taking the case where the number of the conductive parts is one as an example, the specific working process of the tipping detection device is introduced.

[0035] Due to the action of gravity on the conductive liquid, the part of the sphere 100 that is not filled with the conductive liquid is always directly above the sphere 100 in the current placement posture. If the current placement posture is exactly the correct posture, then the conductive part of the sphere 100 is separated from the conductive liquid, disconnecting the electrical connection; if the current placement posture is an incorrect posture, then the conductive part of the sphere 100 is electrically connected to the conductive liquid. In both cases, the sphere 100 will output different electrical signals to the control circuit 200. The control circuit 200 can determine whether the sphere 100 is currently in the correct placement posture according to the received electrical signals, and then output different control signals to the warning device 300 to control the operation of the warning device 300. For example, if the warning device 300 is a buzzer, the control circuit 200 can send a control signal to make the buzzer not sound when it determines that the sphere 100 is in the correct placement posture, and send a control signal to make the buzzer sound when it determines that the sphere 100 is in an incorrect placement posture.

[0036] It can be understood that when the included angle between the placement posture of the sphere 100 and the preset correct placement posture is less than the critical value, although the part of the sphere 100 that is not filled with the conductive liquid is not directly above the sphere 100 in the preset correct placement posture, the conductive part of the sphere 100 will still be separated from the conductive liquid at this time. Based on this, the correct placement posture determined by the control circuit 200 refers to the set of placement postures whose included angle with the preset correct placement posture is less than the critical value. This critical value is related to the size of the conductive part and the volume difference between the conductive liquid and the cavity of the sphere 100: the smaller the size of the conductive part and the smaller the volume difference between the conductive liquid and the cavity of the sphere 100, the smaller the critical value and the higher the detection accuracy. Based on this, the detection accuracy of the tipping detection device can be adjusted by reasonably designing the size of the conductive part and the volume difference between the conductive liquid and the cavity of the sphere 100 to match different scenario requirements.

[0037] The above-mentioned tipping detection device includes a control circuit 200, an alarm device 300, and a sphere 100 filled with a conductive liquid, and the conductive liquid does not completely fill the sphere 100. The sphere 100 outputs corresponding electrical signals to the control circuit 200 according to its own placement posture, and then the control circuit 200 outputs a control signal to control the operation of the alarm device 300 based on the obtained electrical signals. In this way, the correct posture of the sphere can be judged according to the working condition of the alarm device 300, effectively avoiding the occurrence of false triggering and improving the control reliability.

[0038] In one embodiment, please refer to Figure 2 , the sphere includes a cavity 110 and a protrusion 120 provided on the surface of the cavity 110. The inside of the cavity 110 and the protrusion 120 is a connected cavity, and the cavity is filled with a conductive liquid, and the conductive liquid does not completely fill the cavity. The protrusion 120 is connected to the control circuit 200.

[0039] Specifically, the cavity 110 is a spherical insulator. The protrusion 120 is provided on the surface of the cavity 100, and the shape of the protrusion 120 can be a cylinder, a cone, a cuboid or a tetrahedron, etc. As Figure 2As shown, the protrusion 120 is a cylindrical protrusion. The number of the protrusions 120 can be one or multiple. The fact that the conductive liquid does not completely fill the cavity 110 and the cavity inside the protrusion 120 means that the volume of the conductive liquid is smaller than the volume of the cavity. The connection of the protrusion 120 to the control circuit 200 means that the conductive part on the protrusion 120 is connected to the control circuit 200. Taking the cylindrical protrusion as an example, this conductive part can be the top surface of the cylindrical protrusion or the side surface of the cylindrical protrusion. A conductive sheet can be provided on the corresponding conductive part of the protrusion 120 made of insulating material, or the conductive part on the protrusion 120 can be directly made of conductive material. In short, in this embodiment, the shape and number of the protrusions 120, and the implementation manner of the electrical connection between the protrusions 120 and the control circuit 200 are not limited.

[0040] Specifically, if the number of the protrusions 120 is 1 and the protrusion 120 is arranged directly above the top end of the cavity 110, when the sphere 100 is in the correct placement posture, the protrusion 120 is separated from the conductive liquid, forming an open circuit; when the sphere 100 is in an incorrect placement posture, the protrusion 120 is in conduction with the conductive liquid. In both cases, the protrusion 120 will output different electrical signals to the control circuit 200. The control circuit 200 can determine whether the sphere 100 is currently in the correct placement posture according to the received electrical signals, and then output different control signals to the warning device 300 to control the operation of the warning device 300.

[0041] Further, in one embodiment, the cavity 110 is grounded through an isolation resistor. Specifically, a grounding end can be arranged directly below or obliquely below the cavity 110 in the correct placement posture to ground the conductive liquid in the cavity 110. And the conductive liquid is grounded through the isolation resistor to isolate interference.

[0042] In the above embodiment, the sphere 100 is designed with an internally connected cavity 110 and protrusions 120, and the protrusions 120 are connected to the control circuit 200. When the volume of the conductive liquid is certain, it is beneficial to further avoid false triggering caused by external vibration and improve the reliability of control.

[0043] In one embodiment, the number of the protrusions 120 is multiple, and the volume difference between the conductive liquid and the cavity can cause at least one protrusion 120 to be separated from the conductive liquid.

[0044] Specifically, the number of the protrusions 120 can be two, three or any other number. The separation of the protrusion 120 from the conductive liquid means that the electrical connection between the protrusion 120 and the conductive liquid is disconnected. For the sake of easy understanding, the cases where the number of the protrusions 120 is 6 and 5 are respectively taken as examples for illustration below.

[0045] As Figure 2As shown, the number of protrusions is six, and these protrusions are evenly distributed in the six positive directions of the cavity 110, that is, the central axes of the protrusions are coplanar and intersect at the center of the sphere of the cavity 110, and the central axes of adjacent protrusions are perpendicular to each other. If the volume difference between the conductive liquid and the cavity can separate one protrusion from the conductive liquid, then Figure 2 For the structure shown, the control circuit 200 can, according to the received electrical signal, determine which protrusion in the sphere 100 is placed upward. If the volume difference between the conductive liquid and the cavity can separate two protrusions from the conductive liquid, then Figure 2 The structure shown can be used to determine which protrusion in the sphere 100 is placed upward, or which two protrusions are placed obliquely upward.

[0046] As Figure 3 As shown, when the number of protrusions is five, the first protrusion 121 can be set directly above the cavity 110 in the preset correct posture, and the remaining four protrusions are evenly arranged on the cavity 110 with the first protrusion as the center. The angle formed by the central axes of adjacent protrusions is θ, and the central axes of the protrusions are coplanar and intersect at the center of the sphere O of the cavity 110. If the volume difference between the conductive liquid and the cavity can separate one protrusion from the conductive liquid, then Figure 3 For the structure shown, the control circuit 200 can, according to the received electrical signal, determine whether the sphere 100 is in the correct placement posture, whether the tilt angle is θ or 2θ, and whether the tilt direction is to the left or to the right. If the volume difference between the conductive liquid and the cavity can separate two protrusions from the conductive liquid, then Figure 3 The structure shown can be used to determine whether the sphere 100 is in the correct placement posture, whether the tilt angle is θ / 2, θ, 3θ / 2 or 2θ, and whether the tilt direction is to the left or to the right.

[0047] It can be understood that when the number of protrusions 120 is five, these protrusions can also be arranged in the cavity according to the positional relationship. For example, the first protrusion 121 can be set directly above the cavity 110 in the preset correct posture, and the remaining four protrusions are arranged in the front, back, left and right four directions of the cavity 110 with the first protrusion 121 as the center, and the angle formed by the central axes of the remaining protrusions and the first protrusion 121 is β, and the axes of the five protrusions are coplanar and intersect at the center of the sphere of the cavity 110. If the volume difference between the conductive liquid and the cavity can separate one protrusion from the conductive liquid, then this structure can be used to determine whether the sphere 100 is in the correct placement posture, whether the tilt angle is β, and whether the tilt direction is forward, backward, left or right.

[0048] In the above embodiments, different numbers and positional relationships of protrusions, as well as the number of protrusions that can be separated from the conductive liquid simultaneously, can be designed to match different application requirements, which is beneficial to broadening the application scenarios of the pouring detection device.

[0049] In one embodiment, please refer to Figure 4 , the control circuit 200 includes a main control circuit 210 and an alarm driving circuit 220. The main control circuit 210 is connected to the sphere 100 and the alarm driving circuit 220, and the alarm driving circuit 220 is connected to the alarm device 300.

[0050] Specifically, the main control circuit 210 is configured to obtain the electrical signal output by the sphere 100, and output a corresponding control signal to the alarm driving circuit 220 according to the electrical signal, and the alarm driving circuit 220 drives the alarm device 300 to work.

[0051] In one embodiment, the main control circuit includes a main control chip, a pull-up resistor, and a filter capacitor. The power supply terminal of the main control chip is connected to the power supply, the detection terminal of the main control chip is connected to the sphere, and the output terminal of the main control chip is connected to the alarm driving circuit; one end of the pull-up resistor is connected to the power supply, and the other end of the pull-up resistor is connected to the detection terminal of the main control chip; one end of the filter capacitor is connected to the power supply terminal of the main control chip, and the other end of the filter capacitor is grounded.

[0052] Among them, the main control chip can be an MCU (Microcontroller Unit, single-chip microcomputer) chip, an FPGA (Field Programmable Gate Array, field programmable gate array) chip, or other types of chips. The number of pull-up resistors can be one or more. The resistance value of the pull-up resistor can be 9 kΩ, 10 kΩ, or 11 kΩ, or other values. Similarly, the number of filter capacitors can also be one or more. When the number of filter capacitors is multiple, the multiple filter capacitors are connected in parallel to the power supply terminal of the main control chip. The type of filter capacitor can be a polar capacitor or a non-polar capacitor, or an electrolytic capacitor or a chip capacitor; the capacitance value of the filter capacitor can be 0.1 μF, 10 μF, or 100 μF, or other values. In short, the specific types of the main control chip, the pull-up resistor, and the filter capacitor, as well as the resistance value of the pull-up resistor and the capacitance value of the filter capacitor in this embodiment are not limited. For the convenience of understanding, the following combines Figure 5 , and gives an example to illustrate the specific working process of the main control circuit.

[0053] Please refer to Figure 5 , which provides a schematic structural diagram of the main control circuit 210 in one embodiment, and is applicable to the case where the conductive parts in the sphere 100 are less than or equal to six, such as Figure 2 the sphere shown in Figure 5As shown, the electrical signals output by the sphere are respectively connected to the first detection terminal 13 - the sixth detection terminal 18 of the main control chip through the conductive wires SIGNAL1 - SIGNAL6. One end of the first pull-up resistor R1 is connected to the power supply, and the other end of the first pull-up resistor R1 is connected to the first detection terminal 13 of the main control chip U1; one end of the second pull-up resistor R2 is connected to the power supply, and the other end of the second pull-up resistor R2 is connected to the second detection terminal 14 of the main control chip U1; one end of the third pull-up resistor R3 is connected to the power supply, and the other end of the third pull-up resistor R3 is connected to the third detection terminal 15 of the main control chip U1; one end of the fourth pull-up resistor R4 is connected to the power supply, and the other end of the fourth pull-up resistor R4 is connected to the fourth detection terminal 16 of the main control chip U1; one end of the fifth pull-up resistor R5 is connected to the power supply, and the other end of the fifth pull-up resistor R5 is connected to the fifth detection terminal 17 of the main control chip U1; one end of the sixth pull-up resistor R6 is connected to the power supply, and the other end of the sixth pull-up resistor R6 is connected to the sixth detection terminal 18 of the main control chip U1. Among them, the power supply stably provides a voltage of +5V, and the resistance values of each pull-up resistor are all 10kΩ. In addition, one end of the first filter capacitor C1 is connected to the power supply terminal of the main control chip U1, and the other end of the first filter capacitor C1 is grounded. The second filter capacitor C2 is connected in parallel with the first filter capacitor C1. Among them, the first filter capacitor C1 is a 0.1uF chip capacitor, and the second filter capacitor C2 is a 100uF electrolytic capacitor. Further, the conductive liquid in the sphere 100 is connected to the isolation resistor R7 through the grounding wire GND_BALL provided on the sphere, and the other end of the isolation resistor R7 is grounded. Among them, the resistance value of the isolation resistor R7 is 100Ω.

[0054] When the conductive part where the conductive wire SIGNAL1 is located on the sphere is vertically upward, the conductive liquid is disconnected from the conductive wire SIGNAL1, and the first detection terminal 13 of the main control chip U1 will detect a high-level signal; the other conductive wires SIGNAL2 - SIGNAL6 on the sphere are all in contact with the conductive liquid to form a path. Since the conductive liquid is grounded, the detection terminals 14 - 18 respectively connected to these conductive wires all detect low-level signals. That is, when the signal detected by the main control chip U1 is 100000 (1 is high level, 0 is low level), it can be judged that the placement posture of the sphere is that the conductive part where the conductive wire SIGNAL1 is located is vertically upward. By analogy, the main control chip U1 can also judge the placement postures where the conductive parts where the conductive wires SIGNAL2 - SIGNAL6 are located are vertically upward according to the detected signals.

[0055] In the above embodiment, the main control circuit includes a main control chip, pull-up resistors, and filter capacitors, which is beneficial to improving the power supply quality of the main control chip, enhancing the performance stability of the main control chip, and further improving the control reliability of the tipping detection device.

[0056] In one embodiment, please refer to Figure 6, the warning device 300 is a buzzer BUZZ1, and the warning driving circuit 220 includes a first current-limiting resistor R8, a first switch Q1, and a first driving resistor R9; one end of the first current-limiting resistor R8 is connected to the main control circuit 210, and the other end of the first current-limiting resistor R8 is connected to the control end of the first switch Q1; the first end of the first switch Q1 is connected to the power supply through the first driving resistor R9, and the second end of the first switch Q1 is grounded; the buzzer BUZZ1 is connected in parallel with the first driving resistor R9.

[0057] Among them, the first switch Q1 can be a triode, a relay or a field effect transistor, and can also be other types of switching devices. The first current-limiting resistor R8 is a current-limiting resistor for the first switch Q1, and the resistance value of the first current-limiting resistor R8 is determined by the characteristics of the first switch Q1. For example, when the first switch Q1 is an NPN transistor, the first current-limiting resistor R8 is connected to the base of the first switch Q1 to make the first switch Q1 work in the saturation region; the collector of the first switch Q1 is connected to the first driving resistor R9, and the emitter of the first switch Q1 is grounded. Further, the buzzer BUZZ1 can be a voltage buzzer or an electromagnetic buzzer. In short, the specific device composition of the first switch Q1 and the buzzer BUZZ1 is not limited in the embodiments of the present application. The first driving resistor R9 is a driving resistor for the buzzer BUZZ1, and provides a working voltage across the buzzer BUZZ1, and its resistance value is determined by the characteristics of the buzzer BUZZ1. One end of the first current-limiting resistor R8 is specifically connected to the first output terminal 3 of the control chip U1 in the main control circuit 210.

[0058] Specifically, the main control circuit 210 controls the buzzer BUZZ1 to work by outputting different control signals through the first output terminal 3 and the conducting wire BUZZ according to the determined placement attitude of the sphere. For example, the main control circuit 210 can output a +5V square wave signal to turn on the first switch Q1, and the buzzer BUZZ1 emits a sound. The main control circuit 210 can adjust the different warning sounds output by the buzzer BUZZ1 by controlling the pulse width and frequency of the square wave signal, so that the user can adjust the placement attitude of the sphere according to the warning sound.

[0059] In one embodiment, the warning device 300 includes a first indicator light and a second indicator light, the warning driving circuit includes a first indicator light driving circuit and a second indicator light driving circuit, the first indicator light driving circuit is connected to the main control circuit and the first indicator light, and the second indicator light driving circuit is connected to the main control circuit and the second indicator light.

[0060] Among them, the first indicator light driving circuit is specifically connected to the second output terminal 5 of the main control chip U1 in the main control circuit 210, and the second indicator light driving circuit is specifically connected to the third output terminal 4 of the main control chip U1 in the main control circuit 210. Specifically, according to the determined placement posture of the sphere, the main control circuit 210 can output different control signals through different output terminals to control the corresponding indicator lights to work, so that each indicator light outputs different warning lights, so that the user can adjust the placement posture of the sphere according to the warning lights. It should be noted that the above different warning lights include, but are not limited to, combinations of different lighting colors, lighting quantities, and lighting times.

[0061] In one embodiment, please refer to Figure 7 , the first indicator light driving circuit includes a second current limiting resistor R10, a second switch Q2, and a second driving resistor R11; one end of the second current limiting resistor R10 is connected to the main control circuit 210, and the other end of the second current limiting resistor R10 is connected to the control end of the second switch Q2; the second driving resistor R11 is connected in series with the first indicator light LED1, the other end of the second driving resistor R11 is connected to the power supply, and the other end of the first indicator light LED1 is connected to the first end of the second switch Q2; the second end of the second switch Q2 is grounded.

[0062] Among them, the second switch Q2 can be a triode, a relay or a field effect transistor, and can also be other types of switching devices. The second current limiting resistor R10 is a current limiting resistor for the second switch Q2, and the resistance value of the second current limiting resistor R10 is determined by the characteristics of the second switch Q2. For example, when the second switch Q2 is an NPN transistor, the second current limiting resistor R10 is connected to the base of the second switch Q2 to make the second switch Q2 work in the saturation region; the collector of the second switch Q2 is connected to the first indicator light LED1, and the emitter of the second switch Q2 is grounded. Further, the color of the first indicator light LED1 can be red, green or yellow, or other colors. In short, the specific device composition of the second switch Q2 and the first indicator light LED1 in the embodiments of the present application is not limited. The second driving resistor R11 is a driving resistor for the first indicator light LED1, and its resistance value is determined by the characteristics of the first indicator light LED1. One end of the second current limiting resistor R10 is specifically connected to the second output terminal 5 of the control chip U1 in the main control circuit 210.

[0063] Specifically, taking the first indicator light LED1 as a green LED as an example, the main control circuit 210 outputs different control signals through the second output terminal 5 and the wire LED_GREEN to control the first indicator light LED1 to work according to the determined placement posture of the sphere. For example, when the sphere is in the correct placement posture, the main control circuit 210 can output a high-level signal to control the second switch Q2 to conduct and turn on the first indicator light LED1.

[0064] In one embodiment, please refer to Figure 8, the second indicator driving circuit includes a third current-limiting resistor R12, a third switch Q3, and a third driving resistor R13; one end of the third current-limiting resistor R12 is connected to the main control circuit 210, and the other end of the third current-limiting resistor R12 is connected to the control end of the third switch Q3; the third driving resistor R13 is connected in series with the second indicator LED2, the other end of the third driving resistor R13 is connected to the power supply, and the other end of the second indicator LED2 is connected to the first end of the third switch Q3; the second end of the third switch Q3 is grounded.

[0065] Among them, the third switch Q3 can be a triode, a relay, or a field effect transistor, and can also be other types of switching devices. The third current-limiting resistor R12 is the current-limiting resistor of the third switch Q3, and the resistance value of the third current-limiting resistor R12 is determined by the characteristics of the third switch Q3. For example, when the third switch Q3 is an NPN transistor, the third current-limiting resistor R12 is connected to the base of the third switch Q3 to make the third switch Q3 work in the saturation region; the collector of the third switch Q3 is connected to the second indicator LED2, and the emitter of the third switch Q3 is grounded. Further, the color of the second indicator LED1 can be red, green, yellow, or other colors. In short, the specific device composition of the third switch Q3 and the second indicator LED2 is not limited in the embodiments of the present application. The third driving resistor R13 is the driving resistor of the second indicator LED2, and its resistance value is determined by the characteristics of the second indicator LED2. One end of the third current-limiting resistor R12 is specifically connected to the third output terminal 4 of the control chip U1 in the main control circuit 210.

[0066] Specifically, taking the second indicator LED1 as a red LED as an example, the main control circuit 210 controls the second indicator LED2 to work by outputting different control signals through the third output terminal 4 and the conducting wire LED_RED according to the determined placement posture of the sphere. For example, when the sphere is in an incorrect placement posture, the main control circuit 210 can output a high-level signal to control the third switch Q3 to conduct and turn on the second indicator LED2.

[0067] In the above embodiments, by setting different warning devices and warning driving circuits, different warning signals can be output, which is beneficial to improving the flexibility of the application scenarios of the tipping detection device.

[0068] An electrical appliance includes a body and the tipping detection device in any of the above embodiments provided in the body.

[0069] Among them, the electrical appliance can be a product with clear requirements for the placement direction, such as an electric heater, a desktop small fan, or an oxygen generator. Taking the electric heater as an example, in addition to the tipping detection device in the body, a heating element and a heating driving circuit are also fixed. The heating driving circuit is connected to the power supply and the heating element, and the control circuit of the tipping detection device is connected to the heating driving circuit.

[0070] Specifically, the sphere in the tipping detection device is fixed to the body and keeps the same posture as the body. When the control circuit detects that the sphere is in an incorrect placement posture, on the one hand, it controls the warning device to output a corresponding warning signal, and on the other hand, it controls the heating drive circuit to stop working, and the electrical appliance switches to a safety protection device.

[0071] In the description of this specification, the description with reference to terms such as "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or features described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0072] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0073] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An inclination detection device, characterized in that, It includes a control circuit, a warning device, and a sphere filled with a conductive liquid. The control circuit is connected to the sphere and the warning device. The control circuit obtains the electrical signal output by the sphere and outputs a corresponding control signal according to the electrical signal to control the operation of the warning device. The conductive liquid does not completely fill the sphere, and the electrical signal is determined by the placement posture of the sphere. The sphere includes a cavity and protrusions provided on the surface of the cavity. The inside of the cavity and the protrusions is a connected cavity filled with a conductive liquid, and the conductive liquid does not completely fill the cavity. The protrusions are made of insulating material, and a conductive part connecting the control circuit is provided on the top surface of the protrusions. If the number of the protrusions is one, the protrusion is provided directly above the sphere in the preset correct placement posture. When the sphere is in the preset correct placement posture, the conductive part provided on the top surface of the protrusion is separated from the conductive liquid, forming an open circuit. When the sphere is in an incorrect placement posture, the conductive part provided on the top surface of the protrusion is in conduction with the conductive liquid. The control circuit is specifically configured to determine whether the sphere is in the correct placement posture according to the electrical signal, and then output a corresponding control signal to control the operation of the warning device. Among them, the correct placement postures determined by the control circuit are the set of placement postures with an included angle less than the critical value with the preset correct placement posture. The critical value is positively correlated with the size of the conductive part and positively correlated with the volume difference between the conductive liquid and the cavity.

2. The tipping detection device according to claim 1, wherein A conductive sheet is provided on the conductive part.

3. The pouring detection device according to claim 2, wherein The cavity is grounded through an isolation resistor.

4. The tipping detection device according to claim 2, characterized in that, If the number of the protrusions is multiple, the volume difference between the conductive liquid and the cavity can separate at least one protrusion from the conductive liquid.

5. The tipping detection device according to claim 1, characterized in that, The control circuit includes a main control circuit and a warning drive circuit. The main control circuit is connected to the sphere and the warning drive circuit, and the warning drive circuit is connected to the warning device.

6. The pouring detection device according to claim 5, wherein, The main control circuit includes a main control chip, a pull-up resistor, and a filter capacitor. The power supply terminal of the main control chip is connected to the power supply, the detection terminal of the main control chip is connected to the sphere, and the output terminal of the main control chip is connected to the warning drive circuit. One end of the pull-up resistor is connected to the power supply, and the other end of the pull-up resistor is connected to the detection terminal of the main control chip. One end of the filter capacitor is connected to the power supply terminal of the main control chip, and the other end of the filter capacitor is grounded.

7. The pouring detection device according to claim 5, characterized in that, The warning device is a buzzer, and the warning drive circuit includes a first drive resistor, a first switch, and a second drive resistor. One end of the first drive resistor is connected to the main control circuit, and the other end of the first drive resistor is connected to the control terminal of the first switch. The first end of the first switch is connected to the power supply through the second drive resistor, the second end of the first switch is grounded, and the buzzer is connected in parallel with the second drive resistor.

8. The tipping detection device according to claim 5, characterized in that, The warning device includes a first indicator light and a second indicator light. The warning driving circuit includes a first indicator light driving circuit and a second indicator light driving circuit. The first indicator light driving circuit is connected to the main control circuit and the first indicator light, and the second indicator light driving circuit is connected to the main control circuit and the second indicator light.

9. The pouring detection device according to claim 8, characterized in that, The first indicator light driving circuit includes a third driving resistor, a second switch, and a fourth driving resistor. One end of the third driving resistor is connected to the main control circuit, and the other end of the third driving resistor is connected to the control end of the second switch. The fourth driving resistor is connected in series with the first indicator light. The other end of the fourth driving resistor is connected to the power supply, and the other end of the first indicator light is connected to the first end of the second switch. The second end of the second switch is grounded.

10. The tipping detection device according to claim 8, characterized in that, The second indicator light driving circuit includes a fifth driving resistor, a third switch, and a sixth driving resistor. One end of the fifth driving resistor is connected to the main control circuit, and the other end of the fifth driving resistor is connected to the control end of the third switch. The sixth driving resistor is connected in series with the second indicator light. The other end of the sixth driving resistor is connected to the power supply, and the other end of the second indicator light is connected to the first end of the third switch. The second end of the third switch is grounded.

11. An electrical appliance, characterized in that, It includes a machine body and the tipping detection device as described in any one of claims 1 to 10 provided in the machine body.

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