Cover separation detection device and household appliance

Abstract

The application relates to a cover separation detection device and household electrical equipment. A conductive connector is arranged on a cover of the household electrical equipment. When a shell and the cover are separated, the connection between the conductive connector and a detection assembly is disconnected, the detection assembly outputs a first level signal to a controller, and then the controller realizes load power cut-off operation of the household electrical equipment. The cover separation detection device can be applied to household electrical equipment such as an air purifier. When the cover of the air purifier is separated from the shell, the cover can be detected by the detection assembly, and the power supply is cut off in time through the controller, so that the risk of electric shock in the subsequent operation process is avoided, and the safety of filter screen replacement of the air purifier is ensured.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a cover separation detection device and a household appliance. Background Technology

[0002] With the continuous development of technology, people have increasingly higher demands for a high-quality and healthy life. As the main activity area for people, the air quality of the indoor environment directly affects their health. Particulate matter, formaldehyde, and other pollutants from home renovations are the main sources of indoor air pollution. To remove these pollutants, air purifiers have emerged.

[0003] As air purifiers are used over time, their internal filters gradually become saturated. To maintain purification efficiency, users often need to manually disassemble the casing to replace the filter. However, replacing the filter while the air purifier is running poses a risk of electric shock, compromising the safety of the process. Summary of the Invention

[0004] Therefore, it is necessary to provide a casing separation detection device and household appliance to address the issue of unreliable safety performance when replacing air purifier filters.

[0005] A cover separation detection device includes: a conductive connector, a detection component, and a controller. The conductive connector is disposed on the cover of a household appliance. The detection component is used to output a first level signal when the cover and the housing are separated, thereby disconnecting the conductive connector from the detection component. The controller is connected to the detection component and is used to disconnect the household appliance from the load power supply when the first level signal is received.

[0006] The aforementioned cover separation detection device has a conductive connector installed on the cover of the home appliance. When the cover separates from the housing, the connection between the conductive connector and the detection component is broken. The detection component outputs a first-level signal to the controller, which then cuts off the power supply to the home appliance. This cover separation detection device can be applied to home appliances such as air purifiers. When the cover of an air purifier separates from the housing, it can be detected by the detection component, and the controller can cut off the power supply in time, thereby avoiding the risk of electric shock during subsequent operations and ensuring the safety of air purifier filter replacement.

[0007] In one embodiment, the detection component is further configured to output a second level signal when the cover is disposed on the housing so that the conductive connector is connected to the detection component; the second level signal is used by the controller to control the connection between the home appliance and the load power supply.

[0008] In one embodiment, the detection component includes a first resistor, a second resistor, and a filter capacitor. A first end of the first resistor is connected to a power supply, a second end of the first resistor is connected to the first end of the second resistor and the first end of the filter capacitor, a second end of the second resistor is connected to the controller, and a second end of the filter capacitor is grounded. When the cover is disposed on the housing, the first end and the second end of the filter capacitor are respectively connected to the conductive connector.

[0009] In one embodiment, the resistance value of the first resistor is greater than the resistance value of the second resistor.

[0010] In one embodiment, the detection component further includes a needle holder, a first end of the filter capacitor is connected to a first conductive piece of the needle holder, and a second end of the filter capacitor is connected to a second conductive piece of the needle holder; when the cover is disposed on the housing, the first conductive piece and the second conductive piece are respectively connected to the conductive connector.

[0011] In one embodiment, the housing has an embedding hole, and the first conductive sheet and the second conductive sheet are respectively disposed in the embedding hole.

[0012] In one embodiment, the conductive connector is a conductive rod. When the cover is disposed on the housing, the conductive rod is embedded in the embedding hole so that the first conductive sheet and the second conductive sheet are connected through the conductive rod.

[0013] In one embodiment, the detection component is disposed on the display motherboard of the home appliance.

[0014] A household appliance includes a cover, a housing, and the aforementioned cover separation detection device.

[0015] In one embodiment, the home appliance is an air purifier. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the cover separation detection device in one embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the detection component structure in one embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the detection component structure in another embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the shell structure in one embodiment of this application;

[0021] Figure 5 This is a schematic diagram of the filter structure in one embodiment of this application;

[0022] Figure 6 This is a schematic diagram of the cover structure in one embodiment of this application.

[0023] Explanation of reference numerals in the attached diagram: 10-conductive connector, 20-detection component, 30-controller, R1-first resistor, R2-second resistor, C1-filter capacitor, 41-embedded hole. Detailed Implementation

[0024] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0025] Please see Figure 1 A cover separation detection device includes: a conductive connector 10, a detection component 20, and a controller 30. The conductive connector 10 is disposed on the cover of a household appliance. The detection component 20 is used to output a first level signal when the cover and the housing of the household appliance are separated, so that the conductive connector 10 is disconnected from the detection component 20. The controller 30 is connected to the detection component 20 and is used to disconnect the household appliance from the load power supply when the first level signal is received.

[0026] Specifically, the conductive connector 10 is a connecting device with conductive function. Through the conductive connector 10, two ports can be connected to form a conductive path. The detection component 20 is a device used to detect whether the cover of the home appliance is covering the housing. In the two different states of the conductive connector 10 being connected and not connected, the detection component 20 will detect and output different signals. The controller 30 will realize the connection and disconnection operations between the home appliance and the load power supply according to the different signals received.

[0027] When the cover of the home appliance is installed on the housing, the conductive connector 10 installed on the cover will connect to the detection component 20, putting the detection component 20 into a first operating state. When the cover of the home appliance is separated from the housing (e.g., by manual removal by the user), the conductive connector 10 will disconnect from the detection component 20, putting the detection component 20 into a second operating state. In the second operating state, the detection component 20 will output a first level signal to the controller 30. After receiving the first level signal, the controller 30 will trigger a power cut-off operation, thereby disconnecting the home appliance from the power supply.

[0028] It should be noted that the location of the detection component 20 is not unique. As long as the separation and covering of the cover allow the detection component 20 to enter different working states and output different signals to the controller 30, it is acceptable. For example, in a more detailed embodiment, the detection component 20 can be installed in the housing of the household appliance.

[0029] It is understandable that before the controller 30 receives the first level signal and performs the load power cut-off operation, it will also detect whether the home appliance is connected to the load power supply. If the home appliance has already disconnected from the load power supply at this time, that is, the cover and shell are separated in the power-off state, then there is no need to further disconnect the home appliance from the load power supply. If the connection between the home appliance and the load is not disconnected at this time, then it is necessary to disconnect the home appliance from the load power supply according to the first level signal.

[0030] It should be noted that the specific type of controller 30 is not unique. In a more detailed embodiment, controller 30 may specifically be an MCU (Microcontroller Unit). In other embodiments, it may also be implemented using a single-chip microcomputer or a DSP (Digital Signal Processing) device.

[0031] In one embodiment, an additional controller 30 can be installed in the home appliance to control the disconnection of the power supply to the home appliance and the load. In other embodiments, the controller 30 can also be implemented directly using the main controller of the home appliance. This solution eliminates the need for an additional controller 30, effectively reducing the cost of the cover separation detection device.

[0032] The aforementioned cover separation detection device has a conductive connector 10 installed on the cover of the home appliance. When the housing and cover separate, the connection between the conductive connector 10 and the detection component 20 is broken. The detection component 20 outputs a first-level signal to the controller 30, which then cuts off the power supply to the home appliance. This cover separation detection device can be applied to home appliances such as air purifiers. When the cover of an air purifier separates from the housing, it can be detected by the detection component 20, and the controller 30 can promptly cut off the power supply, thus avoiding the risk of electric shock during subsequent operations and ensuring the safety of air purifier filter replacement.

[0033] Furthermore, in one embodiment, the detection component 20 is also configured to output a second level signal when the cover is disposed on the housing so that the conductive connector 10 is connected to the detection component 20; the second level signal is used by the controller 30 to control the connection of the home appliance and the load power supply.

[0034] Specifically, controlling the connection between the home appliance and the load power supply can either maintain the connection between the home appliance and the load power supply, or it can switch the connection from a disconnected state to a connected state. When the cover remains in the state of covering the housing, causing the detection component 20 to output a second-level signal to the controller 30, the controller 30 only needs to maintain the connection between the home appliance and the load power supply based on the received second-level signal. When the cover is reinstalled from the separated state to cover the housing, the signal output by the detection component 20 will change from a first electrical frequency signal to a second-level signal. At this time, the controller 30 can then reconnect the home appliance to the load power supply based on the second-level signal, that is, switch the connection from a disconnected state to a connected state.

[0035] With the above solution, when the cover is installed on the housing, the detected second-level signal can keep the home appliance connected to the load power supply, thereby ensuring the stable operation of the home appliance and improving its operational reliability.

[0036] Please see Figure 2 In one embodiment, the detection component 20 includes a first resistor R1, a second resistor R2, and a filter capacitor C1. The first end of the first resistor R1 is connected to a power supply, the second end of the first resistor R1 is connected to the first end of the second resistor R2 and the first end of the filter capacitor C1, the second end of the second resistor R2 is connected to a controller 30, and the second end of the filter capacitor C1 is grounded. When the cover is installed on the housing, the first end and the second end of the filter capacitor C1 are respectively connected to the conductive connector 10.

[0037] Specifically, MCU_IO is the connection port between the controller and the detection component. In this embodiment, the detection component 20 is equipped with a first resistor R1, a second resistor R2, and a filter capacitor C1. When the cover is placed on the housing, the conductive connector 10 is connected to the first and second ends of the filter capacitor C1. At this time, the controller 30 is connected to ground through the second resistor R2 and the conductive connector 10, resulting in a low-level signal for the second level signal received by the controller 30. When the cover is separated from the housing, the controller 30 is connected to the power supply through the second resistor R2 and the first resistor R1, and the first level signal received by the controller will be a high-level signal.

[0038] It should be noted that the value of the filter capacitor C1 is not unique; different values ​​should be selected based on the specific circumstances to ensure that filtering and anti-interference effects are achieved. Furthermore, the power supply value is not unique either. In a more detailed embodiment, the controller 30 is implemented using the main controller of the home appliance, and the corresponding power supply value is consistent with the power supply value of the main control chip, which can be +5V or +3.3V.

[0039] This scheme uses a simple circuit structure to detect whether the cover and shell have separated due to disassembly or other reasons. Different level signals are output when the cover and shell are separated and when they are not separated, so as to realize the connection control of the load power supply. It has the advantages of simple structure and low cost.

[0040] In one embodiment, the resistance of the first resistor R1 is greater than the resistance of the second resistor R2.

[0041] Specifically, in this embodiment, the resistance value of the first resistor R1 is set to be greater than the resistance value of the second resistor R2. This allows the cover to cover the housing. When the conductive connector 10 is connected to the first and second terminals of the filter capacitor C1 of the detection component 20, the controller 30 is connected to ground through the smaller resistance of the second resistor R2 and the conductive connector 10, enabling the controller 30 to receive a low-level signal. When the cover separates from the housing, the conductive connector 10 disconnects the connection between the first and second terminals of the filter capacitor C1. Since the filter capacitor C1 exists between the second resistor R2 and ground, the controller 30 is then connected to the power supply through the second resistor R2 and the first resistor R1, thus receiving a high-level signal. This configuration effectively improves the operational reliability of the detection component 20.

[0042] Furthermore, in a more detailed embodiment, the resistance value of the first resistor R1 can be set much larger than the resistance value of the second resistor R2. This further ensures that when the conductive connector 10 is connected to the first and second terminals of the filter capacitor C1, the controller 30 can be connected to ground through the second resistor R2 and the conductive connector 10, thereby acquiring a low-level signal. This solution can further improve the operational reliability of the detection component 20.

[0043] Please see Figure 3 In one embodiment, the detection component 20 further includes a needle holder CN1, a first end of a filter capacitor C1 connected to a first conductive sheet of the needle holder CN1, and a second end of the filter capacitor C1 connected to a second conductive sheet of the needle holder CN1; when the cover is disposed on the housing, the first conductive sheet and the second conductive sheet are respectively connected to the conductive connector 10.

[0044] Specifically, to facilitate the connection of the conductive connector 10 between the first and second ends of the filter capacitor C1, this solution includes a pin holder CN1 connected in parallel with the filter capacitor C1. When the cover is separated from the housing and the conductive connector 10 is not connected, there is a certain distance between the first and second conductive pieces of the pin holder CN1, and they are in an open circuit state. When the conductive connector 10 is connected, the first and second conductive pieces will be connected, allowing the controller 30 to connect to ground through the line of the second resistor R2 - first conductive piece - conductive connector 10 - second conductive piece, thus achieving the reception of low-level signals. The solution described above, by providing a pin holder CN1 across the two ends of the filter capacitor C1 and using the pin holder CN1 to connect the conductive connector 10, effectively improves the operational reliability of the detection component 20.

[0045] Please refer to the following: Figure 4 In one embodiment, the housing has an embedding hole 41, and the first conductive sheet and the second conductive sheet are respectively disposed in the embedding hole 41 (not shown).

[0046] Specifically, this solution places the first and second conductive plates of the pin holder CN1 within the embedding hole 41 in the housing, thus avoiding the detection component 20 occupying a large area of ​​the housing. It should be noted that the arrangement of the first and second conductive plates in the embedding hole 41 is not unique; any arrangement is acceptable as long as the first and second conductive plates do not contact each other, and when the conductive connector 10 is inserted into the embedding hole 41, the first and second conductive plates can communicate with each other. For example, they can be disposed on the inner wall of the embedding hole 41.

[0047] Furthermore, in one embodiment, the conductive connector 10 is a conductive rod. When the cover is disposed on the housing, the conductive rod is inserted into the embedding hole 41 so that the first conductive sheet and the second conductive sheet are connected through the conductive rod.

[0048] Specifically, a conductive rod is a rod-shaped conductive device that can be formed entirely of conductive material or formed by plating conductive material onto an insulating rod-shaped object. Based on the placement of the first and second conductive pieces of the pin holder CN1 in the insertion hole 41, to facilitate the connection of the first and second conductive pieces by the conductive connector 10, the conductive connector 10 can be placed on a conductive rod that matches the aforementioned insertion hole 41.

[0049] It should be noted that, in a more detailed embodiment, in order to perfectly embed the conductive rod into the embedding hole 41 on the housing, the conductive rod can be set as a cylindrical structure with a diameter consistent with the diameter of the embedding hole 41, or a cylindrical structure with a diameter slightly smaller than the diameter of the embedding hole 41.

[0050] In one embodiment, the detection component 20 is disposed on the display motherboard of the home appliance.

[0051] Specifically, in this embodiment, the detection component 20 is integrated into the display motherboard of the home appliance, eliminating the need for additional circuit boards. This reduces the area occupied by the cover separation detection device, thereby lowering the circuit cost of the cover separation detection device and improving its reliability.

[0052] It should be noted that, in other embodiments, the detection component 20 may also be integrated into other control circuit boards of the home appliance, such as the main control board. In another embodiment, an additional circuit board may be provided specifically for integrating the detection component 20 provided in this application. The specific configuration of the detection component 20 can be selected based on actual needs.

[0053] To facilitate understanding of the technical solution of this application, the following explanation will be given with reference to the most detailed embodiment, using an air purifier as an example of a household appliance.

[0054] The casing of the air purifier, such as Figure 4 As shown, a certain cavity can be formed through the shell, to hold Figure 5 The filter screen is placed in the cavity formed by the housing, and then passes through... Figure 6 The cover shown covers the housing, forming an air purifier. The cover includes a conductive rod serving as a conductive connector 10. The housing has an insertion hole 41. The first and second conductive plates of the pin seat CN1 of the detection component 20 are positioned inside the insertion hole 41. When the cover covers the housing, the conductive rod is perfectly inserted into the insertion hole 41, establishing communication between the first and second conductive plates. At this time, the controller 30 connects to ground after passing through a second resistor R2 (with lower resistance), the first conductive plate, the conductive rod, and the second conductive plate. The controller 30 receives a low-level signal, and at this point, the controller 30 controls the connection between the air purifier and the load power supply.

[0055] When the user needs to replace the filter or for other purposes, they remove the cover from the housing, causing the cover to separate from the housing. The controller 30 then connects to the power supply through the second resistor R2 and the first resistor R1 in sequence. At this time, the controller 30 receives a high-level signal and will control the air purifier to disconnect from the load power supply.

[0056] A household appliance includes a cover, a housing, and the aforementioned cover separation detection device.

[0057] Specifically, the structure of the cover separation detection device is shown in the attached figure above. The conductive connector 10 is a connecting device with conductive function. Through the conductive connector 10, two ports can be connected to form a conductive path. The detection component 20 is a device used to detect whether the cover of the home appliance covers the housing. In two different states, when the conductive connector 10 is connected and when it is not connected, the detection component 20 will detect and output different signals. The controller 30 will realize the connection and disconnection operations between the home appliance and the load power supply according to the different signals received.

[0058] When the cover of the home appliance is installed on the housing, the conductive connector 10 installed on the cover will connect to the detection component 20, putting the detection component 20 into a first operating state. When the cover of the home appliance is separated from the housing (e.g., by manual removal by the user), the conductive connector 10 will disconnect from the detection component 20, putting the detection component 20 into a second operating state. In the second operating state, the detection component 20 will output a first level signal to the controller 30. After receiving the first level signal, the controller 30 will trigger a power cut-off operation, thereby disconnecting the home appliance from the power supply.

[0059] It is understandable that before the controller 30 receives the first level signal and performs the load power cut-off operation, it will also detect whether the home appliance is connected to the load power supply. If the home appliance has already disconnected from the load power supply at this time, that is, the cover and shell are separated in the power-off state, then there is no need to further disconnect the home appliance from the load power supply. If the connection between the home appliance and the load is not disconnected at this time, then it is necessary to disconnect the home appliance from the load power supply according to the first level signal.

[0060] The detection component 20 is also used to output a second-level signal when the cover is installed over the housing, allowing the conductive connector 10 to be connected to the detection component 20. This second-level signal is used by the controller 30 to control the connection between the appliance and the load power supply. Controlling the connection between the appliance and the load power supply can either maintain the connection or change the connection from a disconnected state to a connected state. When the cover remains in the state of covering the housing, causing the detection component 20 to output a second-level signal to the controller 30, the controller 30 only needs to maintain the connection between the appliance and the load power supply based on the received second-level signal. When the cover is reinstalled over the housing from a detached state, the signal output by the detection component 20 will change from a first electrical frequency signal to a second-level signal. At this time, the controller 30 can then reconnect the appliance to the load power supply based on the second-level signal, i.e., change the connection from a disconnected state to a connected state.

[0061] This solution incorporates a conductive connector 10 on the cover of the home appliance. When the cover separates from the housing, the connection between the conductive connector 10 and the detection component 20 is broken. The detection component 20 then outputs a first-level signal to the controller 30, which in turn disconnects the power supply to the home appliance. This cover separation detection device ensures that the separation of the cover from the housing is detected by the detection component 20, allowing the controller 30 to promptly cut off the power, thus preventing the risk of electric shock during subsequent operations and improving the operational reliability of the home appliance.

[0062] The specific type of home appliance is not unique; any electrical device that has a housing and a cover, and where the housing and cover are detachable, is acceptable. For example, in a more detailed embodiment, the home appliance is an air purifier.

[0063] Specifically, the casing of the air purifier, such as Figure 4 As shown, a certain cavity can be formed through the shell, to hold Figure 5 The filter screen is placed in the cavity formed by the housing, and then passes through... Figure 6 The cover shown covers the housing, forming an air purifier. The cover includes a conductive rod serving as a conductive connector 10. The housing has an insertion hole 41, where the first and second conductive plates of the pin seat CN1 of the detection component 20 are positioned. The remaining parts of the detection component 20 are integrated into the air purifier's display mainboard. When the cover covers the housing, the conductive rod is perfectly inserted into the insertion hole 41, establishing a connection between the first and second conductive plates. At this time, the controller 30 connects to ground after passing through a second resistor R2 (with lower resistance), the first conductive plate, the conductive rod, and the second conductive plate. The controller 30 receives a low-level signal, and at this point, it controls the connection between the air purifier and the load power supply.

[0064] When the user needs to replace the filter or for other purposes, they remove the cover from the housing, causing the cover to separate from the housing. The controller 30 then connects to the power supply through the second resistor R2 and the first resistor R1 in sequence. At this time, the controller 30 receives a high-level signal and will control the air purifier to disconnect from the load power supply.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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, they should be considered to be within the scope of this specification.

[0066] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A cover separation detection device, characterized in that, Used in air purifiers, including: Conductive connectors are installed on the cover of household appliances; A detection component is configured to output a first level signal when the cover and the housing of the home appliance are separated, thereby disconnecting the conductive connector from the detection component; A controller, connected to the detection component, is used to disconnect the home appliance from the load power supply when the first level signal is received; The detection component includes a first resistor, a second resistor, and a filter capacitor. The first end of the first resistor is connected to a power supply, the second end of the first resistor is connected to the first end of the second resistor and the first end of the filter capacitor, the second end of the second resistor is connected to the controller, and the second end of the filter capacitor is grounded. When the cover is placed on the housing, the first end and the second end of the filter capacitor are respectively connected to the conductive connector. The detection component further includes a pin holder, with the first end of the filter capacitor connected to the first conductive piece of the pin holder and the second end of the filter capacitor connected to the second conductive piece of the pin holder; when the cover is disposed on the housing, the first conductive piece and the second conductive piece are respectively connected to the conductive connector; the detection component is disposed on the display motherboard of the home appliance.

2. The cover separation detection device according to claim 1, characterized in that, The detection component is also used to output a second level signal when the cover is disposed on the housing so that the conductive connector is connected to the detection component; the second level signal is used by the controller to control the connection between the home appliance and the load power supply.

3. The cover separation detection device according to claim 1, characterized in that, The resistance of the first resistor is greater than the resistance of the second resistor.

4. The cover separation detection device according to claim 1, characterized in that, The housing has an embedding hole, and the first conductive sheet and the second conductive sheet are respectively disposed in the embedding hole.

5. The cover separation detection device according to claim 4, characterized in that, The conductive connector is a conductive rod. When the cover is placed over the housing, the conductive rod is embedded in the embedding hole so that the first conductive piece and the second conductive piece are connected through the conductive rod.

6. A household appliance, characterized in that, It includes a cover, a shell, and the cover separation detection device according to any one of claims 1-5.

7. The household appliance according to claim 6, characterized in that, The appliance in question is an air purifier.

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