Anti-creeping system and refrigerator

Abstract

The utility model relates to an anti-creeping system and a refrigerator, and relates to the technical field of electric appliances, the system comprises a switching circuit and a controller, the controller is connected with the switching circuit, the switching circuit is used for being connected between a grounding wire of target equipment and a target metal part of the target equipment, and the grounding wire is connected with a Y capacitor of the target equipment; the controller is used for controlling on or off of the switching circuit. The switching circuit is arranged between the Y capacitor and the target metal part of the target equipment, and the controller can control the switching circuit to be disconnected under the condition that the grounding wire of the target equipment is disconnected, so that the condition that leakage current generated by the Y capacitor flows through a human body due to the fact that a user touches the target metal part is avoided; and the security of the target equipment and the use experience of the user are improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of electrical appliances, and in particular to a leakage prevention system and a refrigerator. BACKGROUND

[0002] In the controller circuit of the existing electrical appliance device, an EMI (English: Electromagnetic Interference, Chinese: electromagnetic interference) filter circuit is usually designed to filter the input voltage and current of the electrical appliance device. There is usually a Y capacitor between the live zero line of the controller and the ground to filter the common mode interference of the live line to the ground line or the zero line to the ground line. At the same time, the metal parts (such as metal shell, metal door body, etc.) of the electrical appliance device are connected to the ground of the power grid through the ground wire of the power supply line. When the power supply of the user's electrical appliance device is not grounded, in the power-on state, if a person directly or indirectly touches the metal part through a conductor, the power supply passes through the Y capacitor, the metal part, and the human body with a small leakage current, and the user may have a tingling feeling of leakage.

[0003] After the user feedbacks the leakage of the metal part of the electrical appliance device, the leakage problem of the metal part is solved by disconnecting the Y capacitor and the metal part through after-sales maintenance. CONTENT OF THE UTILITY MODEL

[0004] To overcome the problems in the related art, the present disclosure provides a leakage prevention system and a refrigerator.

[0005] According to a first aspect of an embodiment of the present disclosure, a leakage prevention system is provided, the system comprising: a switch circuit and a controller; the controller is connected with the switch circuit, the switch circuit is used to be connected between the ground wire of a target device and the target metal part of the target device, and the ground wire is connected with a Y capacitor of the target device; the controller is used to control the switch circuit to be closed or disconnected.

[0006] Optionally, the switch circuit comprises at least one relay.

[0007] Optionally, the switch circuit comprises at least one MOS tube or a first triode.

[0008] Optionally, the system further comprises a control circuit, and the control circuit comprises: a second triode, a base of the second triode is connected with the controller, a collector of the second triode is connected with one end of the switch circuit, and an emitter of the second triode is grounded.

[0009] The controller is used to control the switch circuit to be closed or disconnected by controlling the second triode.

[0010] Optionally, the other end of the switch circuit is connected with a direct current power supply.

[0011] The controller is configured to control the second triode to be turned on, and the direct current power supply is configured to supply power to the switch circuit, so that the switch circuit is closed; and control the second triode to be turned off, and the direct current power supply is configured to stop supplying power to the switch circuit, so that the switch circuit is opened.

[0012] Optionally, the control circuit further comprises a diode connected in parallel with the switch circuit.

[0013] In the case that the second triode is turned off, the current in the switch circuit flows through the branch in which the diode is located.

[0014] Optionally, the controller is connected with a display of the target device.

[0015] The controller is configured to receive a first control instruction sent by the display, and control the switch circuit to be closed or opened according to the first control instruction.

[0016] Optionally, the controller comprises a communication component, and the controller is connected with a target server or a target terminal through the communication component.

[0017] The controller is configured to receive a second control instruction sent by the target server or the target terminal through the communication component, and control the switch circuit to be closed or opened according to the second control instruction.

[0018] Optionally, the target device comprises a refrigerator, and the target metal component comprises a cabinet shell and / or a cabinet door.

[0019] According to a second aspect of the embodiments of the present disclosure, a refrigerator is provided, which comprises the anti-creeping system according to the first aspect of the embodiments of the present disclosure.

[0020] The technical solutions provided by the embodiments of the present disclosure can have the following beneficial effects:

[0021] The anti-creeping system in the present disclosure comprises a switch circuit and a controller, wherein the controller is connected with the switch circuit, the switch circuit is configured to be connected between a grounding wire of a target device and a target metal component of the target device, the grounding wire is connected with a Y capacitor of the target device, and the controller is configured to control the switch circuit to be closed or opened. The present disclosure sets the switch circuit between the Y capacitor and the target metal component of the target device, and in the case that the grounding wire of the target device is disconnected, the controller can control the switch circuit to be opened, thereby avoiding the situation that the leakage current generated by the Y capacitor due to the user touching the target metal component flows through the human body, and improving the safety of the target device and the user experience.

[0022] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and serve to explain the principles of the present disclosure, in which, like reference numerals designate corresponding parts throughout the several views.

[0024] Figure 1 is a circuit diagram of a target device.

[0025] Figure 2 is a leakage scenario diagram of another target device.

[0026] Figure 3 is a schematic diagram of a leakage prevention system according to an exemplary embodiment.

[0027] Figure 4 is a schematic diagram of another leakage prevention system according to an exemplary embodiment.

[0028] Figure 5 is a schematic diagram of another leakage prevention system according to an exemplary embodiment.

[0029] Figure 6 is a communication diagram of a controller according to an exemplary embodiment.

[0030] Figure 7 is a block diagram of a refrigerator according to an exemplary embodiment.

[0031] REFERENCE NUMERALS

[0032] Leakage prevention system - 100; switching circuit - 101; controller - 102; control circuit - 103; refrigerator - 200; relay - K; target metal component - M; second triode - Q; diode - D; direct current power supply - V. DETAILED DESCRIPTION

[0033] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The following description is made with reference to the accompanying drawings in which like reference numerals represent like elements, unless the context dictates otherwise. The following exemplary embodiments described are not representative of all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0034] Before introducing a leakage prevention system and a refrigerator according to an exemplary embodiment of the present disclosure, an application scenario related to the exemplary embodiment of the present disclosure is introduced first.

[0035] Figure 1 is a circuit diagram of a target device, as Figure 1 As shown, A is a zero line, B is a live line, C is a ground line, and M is a target metal component in the target device. In existing controller circuits, Y capacitors usually appear in pairs, such as Y1 and Y2, which are connected across the live line and ground and the zero line and ground, respectively, to form a symmetrical circuit structure that helps better suppress common-mode interference. The capacitance values of Y capacitors are 1000 PF, 2200 PF, and relatively large 4700 PF or more.

[0036] Taking a refrigerator as an example, during operation of the refrigerator, various electromagnetic interference signals are generated by electrical elements such as the compressor and motor of the refrigerator when they are working. These interference signals can be conducted to the power grid through the power supply line, affecting the normal operation of other electrical appliances, and can also interfere with the control circuit of the refrigerator itself. Y capacitors can provide a low-impedance bypass path for these common-mode interference signals, allowing interference current to flow to ground through the Y capacitors, thereby effectively suppressing common-mode interference and ensuring stable operation of the refrigerator control circuit. In the refrigerator controller circuit, one end of the Y capacitor is connected to the live line or the zero line, and the other end is connected to the metal shell or the ground terminal of the refrigerator, thereby achieving electrical connection between the Y capacitor and the ground.

[0037] As shown in Figure 2 When the power supply of the target device is not grounded, when a human body directly or indirectly contacts the target metal component M through a conductor under the power-on state of the target device, the power supply flows through the Y capacitor (Y2) through the target metal component M to the ground through the human body, and a relatively small leakage current flows through, and the user may have a tingling feeling of electric shock, which is likely to cause user complaints.

[0038] Figure 3 is a schematic diagram of an anti-leakage system according to an example embodiment, as Figure 3 As shown, the system 100 includes a switching circuit 101 and a controller 102. The controller 102 is connected to the switching circuit 101, and the switching circuit 101 is used to be connected between the ground line of the target device and the target metal component M of the target device, and the ground line is connected to the Y capacitor of the target device. The controller 102 is used to control the switching circuit 101 to be closed or opened.

[0039] For example, the target device in the embodiments of the present disclosure can be any device provided with a Y capacitor, such as a refrigerator, an air conditioner, a television, an oven, a microwave oven, etc. The target metal component M can be any metal component on the target device, such as a metal cabinet shell, a metal door body, a metal button, a metal handle, etc. The target device can include two Y capacitors Y1 and Y2, and the ground line can be connected between Y1 and Y2.

[0040] The switch circuit 101 can include at least one relay K, and can also include at least one field effect tube or first transistor, where the field effect tube can be a JFET (Junction Field Effect Transistor) or a MOSFET (Metal-Oxide Semiconductor Field Effect Transistor), and the first transistor can be an NPN transistor or a PNP transistor.

[0041] In the case where the target device is in the powered-on state and the ground wire is disconnected, if a person directly or indirectly touches the target metal component M through a conductor, the power supply has a small leakage current flowing through the target metal component M and the human body through the Y capacitor, and the user may have a tingling feeling of electric leakage. To avoid this problem, the disclosed embodiment sets a switch circuit 101 between the Y capacitor and the target metal component M of the target device, and can control the switch circuit 101 to be open by the controller 102 in the case where the target device is in the powered-on state and the ground wire is disconnected, so as to disconnect the target metal component M from the power supply. In this way, when the user directly or indirectly touches the target metal component M, no leakage current flows through the human body, which can improve the safety of the target device and the user's experience. In the case where the ground wire of the target device is connected, the switch circuit 101 can be controlled to be closed to connect the target metal component M to the ground through the power supply line.

[0042] In summary, the anti-leakage system in the present disclosure includes a switch circuit and a controller, where the controller is connected to the switch circuit, the switch circuit is connected between the ground wire of the target device and the target metal component of the target device, the ground wire is connected to the Y capacitor of the target device, and the controller is used to control the switch circuit to be closed or opened. The present disclosure sets a switch circuit between the Y capacitor and the target metal component of the target device, and the controller can control the switch circuit to be open in the case where the ground wire of the target device is disconnected, so as to avoid the situation that the leakage current generated by the Y capacitor flows through the human body when the user touches the target metal component, thereby improving the safety of the target device and the user's experience.

[0043] Figure 4 is a block diagram of another anti-leakage system according to an exemplary embodiment, as shown in Figure 4 The system 100 further includes a control circuit 103, which includes a second transistor Q, the base of the second transistor Q is connected to the controller 102, the collector of the second transistor Q is connected to one end of the switch circuit 101, and the emitter of the second transistor Q is grounded.

[0044] The controller 102 is configured to control the switch circuit 101 to be closed or opened by controlling the second transistor Q.

[0045] In some embodiments, as shown in FIG. 1, the other end of the switch circuit 101 can be connected to a direct current power supply V. When the controller 102 controls the second transistor Q to be turned on, the direct current power supply V can supply power to the switch circuit 101 to make the switch circuit 101 closed. When the controller 102 controls the second transistor Q to be turned off, the direct current power supply V can stop supplying power to the switch circuit 101 to make the switch circuit 101 opened. Figure 4

[0046] In some other embodiments, the switch circuit 101 can include a relay K, one end of the relay K can be connected to the collector of the second transistor Q, and the other end of the relay K can be connected to the direct current power supply V, which can be 12V for example. When the controller 102 controls the second transistor Q to be turned on, the direct current power supply V can supply power to the relay K, and when there is current flowing through the coil of the relay K, a magnetic field is generated inside the relay K to make the relay K attracted. When the controller 102 controls the second transistor Q to be turned off, the direct current power supply V stops supplying power to the relay K, and there is no magnetic field inside the relay K to make the relay K opened.

[0047] Figure 5 FIG. 2 is a block diagram of another leakage prevention system according to an example embodiment. As shown in FIG. 2, the control circuit 103 further includes a diode D connected in parallel with the switch circuit 101. Figure 5

[0048] When the second transistor Q is turned off, the current in the switch circuit 101 flows through the branch where the diode D is located.

[0049] For example, the diode D in the embodiment of the present disclosure can function as a freewheeling diode. If the controller 102 controls the second transistor Q to be turned off, a large current can be generated in the switch circuit 101, which can flow through the branch where the diode D is located, thereby avoiding damage to other devices in the circuit.

[0050] In some other embodiments, the switch circuit 101 can include a relay K, and when the controller 102 controls the second transistor Q to be turned off, a large induced current can be generated in the coil of the relay K, which can flow through the branch where the diode D is located, thereby avoiding damage to other devices in the circuit.

[0051] Figure 6 FIG. 3 is a communication diagram of a controller according to an example embodiment. As shown in FIG. 3, the controller 102 is connected to the display of the target device. Figure 6

[0052] ​​​The controller 102 can be configured to receive the first control instruction sent by the display and control the switch circuit 101 to be closed or opened according to the first control instruction.

[0053] For example, when the grounding wire of the target device is disconnected, the display can display a first prompt information indicating that the grounding wire is disconnected, so that the user can know that the grounding wire is disconnected, and the user can trigger a first control instruction for indicating the switch circuit 101 to be opened through the display, and the controller 102 can control the switch circuit 101 to be opened according to the received first control instruction. When the grounding wire of the target device is connected to the ground, the display can display a second prompt information indicating that the grounding wire is connected to the ground, so that the user can know that the grounding wire is connected to the ground, and the user can trigger a first control instruction for indicating the switch circuit 101 to be closed through the display, and the controller 102 can control the switch circuit 101 to be closed according to the received first control instruction, so that the target metal component M can be connected to the ground through the grounding wire. In this way, when the grounding wire is disconnected, the user will not be electrocuted when touching the target metal component M, and when the grounding wire is connected to the ground, the user will not be electrocuted when touching the target metal component M.

[0054] In some other embodiments, the controller 102 can further include a communication component and a MCU (Microcontroller Unit, microcontroller unit), and the controller 102 can be connected to a target server or a target terminal through the communication component. Figure 6

[0055] The controller 102 can be configured to receive a second control instruction sent by the target server or the target terminal through the communication component and control the switch circuit 101 to be closed or opened according to the second control instruction.

[0056] For example, the communication component can include at least one of a Wi-Fi module and a Bluetooth module, and the target terminal can be any terminal capable of communicating with other devices through Wi-Fi or Bluetooth, such as a smart phone, a tablet computer, a smart television, a smart watch, a PDA (Personal Digital Assistant, personal digital assistant), a portable computer, etc.

[0057] In some embodiments, when the target terminal is close to the target device, the target terminal can directly send the second control instruction to the controller 102 through Bluetooth.

[0058] ​In some other embodiments, when the target terminal is far away from the target device, the target terminal can send a second control instruction to the target server through Wi-Fi, and the target server can send the second control instruction to the controller 102.

[0059] In some other embodiments, when the grounding wire of the target device is disconnected, the target device can send third prompt information indicating that the grounding wire is disconnected to the target terminal, and the target terminal can display the third prompt information to prompt the user. The user can trigger a second control instruction indicating that the switch circuit 101 is disconnected through the target terminal, and the controller 102 can control the switch circuit 101 to be disconnected according to the received second control instruction. When the grounding wire of the target device is grounded, the target device can send fourth prompt information indicating that the grounding wire is grounded to the target terminal, and the target terminal can display the fourth prompt information to prompt the user. The user can trigger a second control instruction indicating that the switch circuit 101 is closed through the target terminal, and the controller 102 can control the switch circuit 101 to be closed according to the received second control instruction, so that the target metal component M can be grounded through the grounding wire. In this way, when the user touches the target metal component M in the case of a disconnected grounding wire, the current does not flow through the human body to the ground, so the problem of electric shock and numbness does not occur. In the case of a grounded grounding wire, the current flows into the ground through the grounding wire, and the user touching the target metal component M also does not occur the problem of electric shock and numbness.

[0060] In some other embodiments, the target device can be a refrigerator, and the target metal component M can be a cabinet shell.

[0061] In some other embodiments, the target device can be a refrigerator, and the target metal component M can be a cabinet door.

[0062] Figure 7 FIG. 2 is a block diagram of a refrigerator according to an exemplary embodiment, as shown in Figure 7 The refrigerator 200 includes the anti-electric shock system 100 in the embodiments of the present disclosure.

[0063] In summary, the anti-electric shock system in the present disclosure includes a switch circuit and a controller, wherein the controller is connected to the switch circuit, the switch circuit is used to be connected between the grounding wire of the target device and the target metal component of the target device, the grounding wire is connected to the Y capacitor of the target device, and the controller is used to control the switch circuit to be closed or disconnected. The present disclosure sets a switch circuit between the Y capacitor and the target metal component of the target device, and in the case of a disconnected grounding wire of the target device, the controller can control the switch circuit to be disconnected, thereby avoiding the situation that the leakage current generated by the Y capacitor flows through the human body when the user touches the target metal component, and improving the safety of the target device and the user experience.

[0064] In the detailed description above, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration specific aspects in which the disclosure can be practiced. In this regard, directional terminology, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and other commonly used terms, are used herein for the purpose of illustration only and are not intended to be limiting. Because the described devices can be positioned in a number of different orientations, the directional terminology can be used for illustration purposes only and is not limiting. It is to be understood that other aspects can be utilized and structural or logical changes can be made without departing from the scope of the present disclosure. The following detailed description, therefore, is not to be taken in a limiting sense.

[0065] It is to be understood that the features of the various aspects of the present disclosure described herein can be combined with each other, unless specifically noted otherwise. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items; similarly, "at least one of' includes any and all combinations of one or more of the associated listed items.

[0066] It should be understood that, unless otherwise specifically stated and limited, the terms "joined," "attached," "mounted," "connected," "linked," "fixed," and the like, as used in the embodiments of the disclosure, are to be construed to be broad terms, for example, can be fixed attachments, or detachable attachments, or integral connections; can be mechanical, electrical, or communicative connections between the elements, or interactions between the elements; can be direct connections, or indirect connections through intermediaries, unless specifically stated and limited otherwise. The specific meaning of the above terms in this document can be understood by the person of ordinary skill in the art according to the specific context.

[0067] Further, the word "over" as used in reference to a component, element, or material layer "over" another component, element, or material layer, is used herein to mean that the component, element, or material layer is positioned "indirectly" on the other component, element, or material layer such that one or more additional components, elements, or layers are arranged between the other component, element, or material layer and the component, element, or material layer. However, the word "over" as used in reference to a component, element, or material layer "over" another component, element, or material layer, can optionally also mean that the component, element, or material layer is positioned "directly" on the other component, element, or material layer, e.g., in direct contact with the other component, element, or material layer.

[0068] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, part, region, layer, or section mentioned in the examples may also be referred to as the second component, part, region, layer, or section. Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include at least one of that feature. In the description herein, “a plurality” means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] It should be understood that spatial relative terms, such as “above,” “upper,” “below,” and “lower,” are used herein to describe the relationship between one element and another shown in the figures. In addition to the orientation depicted in the figures, these spatial relative terms are also intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “above” or “upper” relative to another element would be “below” or “lower” relative to that other element. Thus, depending on the spatial orientation of the device, the term “above” encompasses both above and below orientations. Devices may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0070] Furthermore, the term “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous compared to other aspects or designs. Rather, the use of the term “exemplary” is intended to present the concept in a concrete manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from the context, “X applies A or B” is intended to mean any of the natural inclusive arrangements. That is, “X applies A or B” satisfies any of the foregoing instances if X applies A; X applies B; or both X applies A and B. Additionally, unless otherwise specified or clear from the context to refer to the singular form, the articles “a” and “an” as used in this application and the appended claims are generally understood to mean “one or more.”

[0071] Likewise, although the present disclosure has been described and illustrated with respect to one or more implementations, equivalent alterations and modifications will become apparent to those skilled in the art that do not depart from the true spirit and scope of the disclosure. The present disclosure includes all such modifications and alterations and is limited only by the scope of the following claims. In particular regard to the various functions performed by the above described components (e.g., elements, resources, etc.), the terms (including a reference to a "means") used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the described function (e.g., a functional equivalent), even though not structurally equivalent to the disclosed structure. In addition, although a particular feature of the disclosure can have been disclosed with respect to only one of several implementations, other implementations can include the particular feature. For example, the features of one implementation can be combined with those of another implementation. Furthermore, although the foregoing has been described in some detail for purposes of clarity, it will be apparent that certain changes and modifications can be made which will be readily apparent to those skilled in the art. It is intended to cover all such modifications and changes that fall within the scope of the disclosure, including full equivalents. In general, the terms used are intended to have their ordinary meanings in the art which can vary with context. It will be apparent that examples, illustrative implementations and embodiments described herein can be practiced by other than the methods and examples that are specifically described. Accordingly, this description is not intended to limit the scope of the disclosure, as claimed, but is merely contemplated to provide a reasonable disclosure of combinations and sub-combinations of the various features described and / or illustrated herein.

[0072] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the concepts disclosed herein. The specification and examples given are intended as illustrative only and not in a limiting sense. The true scope of the present disclosure is indicated by the attached claims.

[0073] It is to be understood that the present disclosure is not limited to the precise construction described and as shown in the drawings, and that various modifications and changes can be effected therein by those skilled in the art without departing from the scope of the disclosure. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. An electric leakage prevention system, characterized by, The system (100) comprises a switch circuit (101) and a controller (102); the controller (102) is connected with the switch circuit (101); the switch circuit (101) is used for being connected between a ground wire of a target device and a target metal component (M) of the target device, and the ground wire is connected with a Y capacitor of the target device; and the controller (102) is used for controlling the switch circuit (101) to be closed or opened.

2. The system of claim 1, wherein, The switch circuit (101) comprises at least one relay (K).

3. The system of claim 1, wherein, The switch circuit (101) comprises at least one field effect tube or first transistor.

4. The system of claim 1, wherein, The system (100) further comprises a control circuit (103), and the control circuit (103) comprises a second transistor (Q), a base of the second transistor (Q) is connected with the controller (102), a collector of the second transistor (Q) is connected with one end of the switch circuit (101), and an emitter of the second transistor (Q) is grounded. The controller (102) is used for controlling the switch circuit (101) to be closed or opened by controlling the second transistor (Q).

5. The system of claim 4, wherein, The other end of the switch circuit (101) is connected with a direct current power supply (V). The controller (102) is used for controlling the second transistor (Q) to be turned on, the direct current power supply (V) is used for supplying power to the switch circuit (101) so as to make the switch circuit (101) to be closed; and the controller (102) is used for controlling the second transistor (Q) to be turned off, the direct current power supply (V) is used for stopping supplying power to the switch circuit (101) so as to make the switch circuit (101) to be opened.

6. The system of claim 5, wherein, The control circuit (103) further comprises a diode (D), and the diode (D) is connected in parallel with the switch circuit (101). In the case that the second transistor (Q) is turned off, the current in the switch circuit (101) flows through a branch in which the diode (D) is located.

7. The system of claim 1, wherein, The controller (102) is connected with a display of the target device. The controller (102) is used for receiving a first control instruction sent by the display and controlling the switch circuit (101) to be closed or opened according to the first control instruction.

8. The system of claim 1, wherein, The controller (102) comprises a communication component, and the controller (102) is connected with a target server or a target terminal through the communication component. The controller (102) is used for receiving a second control instruction sent by the target server or the target terminal through the communication component and controlling the switch circuit (101) to be closed or opened according to the second control instruction.

9. The system of any one of claims 1-8, wherein, The target device comprises a refrigerator, and the target metal component (M) comprises a cabinet shell and / or a cabinet door.

10. A refrigerator (200) characterized by, The refrigerator (200) comprises the anti-creeping system (100) according to any one of claims 1-9.

Images