Door opening device, electric appliance, and reset method for door opening device

Abstract

The application relates to the technical field of electric appliances, and discloses a door opening device, an electric appliance and a resetting method of the door opening device. The door opening device comprises a base, a top door piece, a transmission wheel and a driving assembly, the top door piece is installed on the base, and the transmission wheel is rotationally connected to the base; the transmission wheel comprises a first transmission part; the driving assembly is used for driving the transmission wheel to rotate in the same direction, so that the first transmission part is engaged with or disengaged from a door opening transmission strip or a door closing transmission strip; in the case that the first transmission part is engaged with the door opening transmission strip, a top door part is extended to push open a door body; in the case that the transmission wheel is engaged with the door closing transmission strip, the top door part is retracted. In the case that the first transmission part is disengaged from the door opening transmission strip and the door closing transmission strip, if the door opening device is powered off, the top door piece cannot be driven to reset, at this time, the top door piece is disengaged from the transmission wheel, the top door piece is no longer limited by the first transmission part, at this time, the door body is manually closed, the top door part is retracted under the action of the door body, and the door body is manually closed.

Description

Technical Field

[0001] This application belongs to the technical field of electrical equipment, specifically relating to a door opening device, electrical equipment, and a method for resetting the door opening device. Background Technology

[0002] In related technologies, electrical equipment uses a door opening device to open the door; the top door component of the door opening device extends to open the door, and the top door component returns to its original position, allowing the door to be closed manually. However, if a power outage occurs after the top door component extends to open the door, it cannot automatically retract, resulting in the door failing to close. Summary of the Invention

[0003] To address the technical problem that current door opening devices cannot close due to power outages, this application provides a door opening device that can reduce the risk that the top door component cannot reset due to power outages.

[0004] In a first aspect of this application, a door opening device is provided, comprising:

[0005] Base;

[0006] A top door component is installed on the base; the top door component includes a top door portion, an opening drive bar and a closing drive bar arranged opposite to each other, and the top door portion is connected to the opening drive bar and the closing drive bar;

[0007] A transmission wheel is rotatably connected to the base; the transmission wheel includes a first transmission part.

[0008] A drive assembly for driving the transmission wheel to rotate;

[0009] When the drive assembly drives the transmission wheel to rotate in the same direction, the first transmission part engages or disengages with the door opening transmission bar, or engages or disengages with the door closing transmission bar; when the first transmission part engages with the door opening transmission bar, the top door portion extends to open the door body; when the transmission wheel engages with the door closing transmission bar, the top door portion retracts.

[0010] In some embodiments, the door opening drive bar and / or the door closing drive bar are arranged along the extension direction of the top door portion.

[0011] In some embodiments, the first transmission part is a wheel, and the first transmission part has a first transmission tooth protruding from its circumference, and the length of the first transmission tooth is less than the circumference of the first transmission part.

[0012] In some embodiments, the length of the first transmission tooth is less than the distance between the door opening transmission bar and the door closing transmission bar.

[0013] In some embodiments, the top door component further includes a main body portion connected to the main body portion, and the door opening drive bar and the door closing drive bar are disposed on the main body portion.

[0014] In some embodiments, the main body is provided with a movable groove, and the first transmission part is disposed in the movable groove; the movable groove has a first inner wall and a second inner wall disposed opposite to each other, the door opening transmission strip is disposed in the first inner wall, and the door closing transmission strip is disposed in the second inner wall.

[0015] In some embodiments, the base is provided with a spring member; when the top door member is in the reset state, the top door member abuts against the spring member.

[0016] In some embodiments, the drive assembly includes a drive wheel, and at least two top door members and transmission wheels are provided, with the top door members and transmission wheels corresponding to each other; the drive wheel includes a first engagement portion, and the drive wheel rotates in the same direction such that the first engagement portion engages with one of the transmission wheels and disengages from the other transmission wheel.

[0017] In some embodiments, the first meshing part is a wheel body, and the peripheral side of the first meshing part is provided with a first meshing tooth, and the length of the first meshing tooth is less than the circumference of the first meshing part.

[0018] In some embodiments, the door opening device further includes an angle sensor mounted on the base, the angle sensor being used to detect the angle of the drive wheel.

[0019] In a second aspect of this application, an electrical device is provided, including a housing, a door, and an opening device as described in any embodiment of the first aspect above, wherein the door is rotatably connected to the housing; and the opening device is mounted on the housing for driving the door to rotate relative to the housing, thereby opening the door.

[0020] In a third aspect of this application, a method for resetting a door opening device is provided. Based on any embodiment of the first aspect described above, the driving assembly includes a drive wheel, and at least two door-mounted components and transmission wheels are provided, with the door-mounted components and transmission wheels corresponding to each other. The drive wheel includes a first engaging portion, and the drive wheel rotates in the same direction such that the first engaging portion engages with one of the transmission wheels and disengages from the other transmission wheel. The method includes:

[0021] Obtain the angle information of the drive wheel;

[0022] If the difference between the angle information and the first reset angle is less than or equal to 90 degrees, then control the drive wheel to rotate to the first reset angle;

[0023] If the difference between the angle information and the second reset angle is less than 90 degrees, then control the drive wheel to rotate to the second reset angle;

[0024] The difference between the first reset angle and the second reset angle is 180 degrees.

[0025] According to one or more embodiments of the present application, in the process of the transmission wheel rotating in the same direction, when the first transmission part is engaged with the door opening transmission bar, the first transmission part is disengaged from the door closing transmission bar. As the transmission wheel rotates, the door opening transmission bar extends, and the top door part extends accordingly to open the door body. When the top door part is fully extended, the door body is opened. At this time, the first transmission part is disengaged from the door opening transmission bar, so that the door opening transmission bar no longer extends with the rotation of the transmission wheel, and the first transmission part is not yet engaged with the door closing transmission bar. The transmission wheel no longer restricts the movement of the top door part. If the transmission wheel continues to rotate, the first transmission part engages with the door closing transmission bar, so that the door closing transmission bar retracts with the rotation of the transmission wheel, and the top door part retracts accordingly, realizing the reset of the top door part. If the door opening device is de-energized, causing the top door part to fail to reset, the door body can be manually closed. The top door part retracts and resets under the action of the door body, realizing the manual closing of the door body. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the door opening device in one or more embodiments of this application is shown.

[0028] Figure 2 A schematic diagram of the door opening device in one or more embodiments of this application is shown.

[0029] Figure 3 A schematic diagram of the door opening device in one or more embodiments of this application is shown.

[0030] Figure 4 A schematic diagram showing the cooperation relationship between the top door component and the drive wheel of the door opening device in one or more embodiments of this application is shown.

[0031] Figure 5 A schematic diagram of the door opening device in one or more embodiments of this application is shown.

[0032] Figure 6A schematic diagram showing the engagement relationship between the drive wheel and the transmission wheel of the door opening device in one or more embodiments of this application is shown.

[0033] Figure 7 A schematic diagram of the door opening device in one or more embodiments of this application is shown.

[0034] Figure 8 A schematic diagram of the door opening device in one or more embodiments of this application is shown.

[0035] Figure 9 A schematic diagram of the door opening device in one or more embodiments of this application is shown.

[0036] Figure 10 A schematic diagram of the door opening device in one or more embodiments of this application is shown.

[0037] Explanation of reference numerals in the attached drawings: 100-base, 110-guide rail, 120-opening, 200-top door component, 210-top door section, 220-main body section, 221-opening drive bar, 222-closing drive bar, 223-moving groove, 223a-first inner wall, 223b-second inner wall, 224-second transmission gear, 225-force-bearing column, 230-first top door component, 240-second top door component, 250-rubber sleeve, 300-transmission wheel, 31 0-First transmission unit, 311-First transmission gear, 320-Second transmission unit, 330-First transmission wheel, 340-Second transmission wheel, 400-Drive assembly, 410-Drive wheel, 411-First meshing part, 411a-First meshing gear, 412-Second meshing part, 413-Reducer, 510-First sensor, 520-Second sensor, 600-Elastic element, 700-Box body, 800-Door body, 900-Angle sensor. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0039] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity purposes and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0040] In related technologies, electrical equipment uses a door opening device to open the door; the top door component of the door opening device extends to open the door, and the top door component returns to its original position, allowing the door to be closed manually. However, if a power outage occurs after the top door component extends to open the door, it cannot automatically retract, resulting in the door failing to close.

[0041] For example, the main body and door of the refrigerator are rotatably connected; the motor of the door opening device drives the top door component to extend to open the door, and the motor of the door opening device drives the top door component to retract, so that the door can be closed manually; however, after the door is opened, the top door component may fail to automatically reset due to a power failure of the door opening device. Since the top door component is extended and cannot reset, it obstructs the door from closing, making it impossible to close the door manually.

[0042] According to a first aspect of this application, a door opening device is provided, wherein a top door member of the door opening device can extend to open the door body, thereby opening the door. When the top door member is fully extended, if the door opening device is de-energized, the door body can be manually closed and the top door member can be pushed back to its original position.

[0043] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 The diagrams and cross-sectional views of the door opening device under different states and from different perspectives are shown.

[0044] Please see Figure 1 The door opening device includes a base 100, a top door component 200, a transmission wheel 300, and a drive assembly 400. The top door component 200 is mounted on the base 100, and the transmission wheel 300 is rotatably connected to the base 100. The top door component 200 includes a top door portion 210, an opening transmission bar 221, and a closing transmission bar 222 disposed opposite to each other. The top door portion 210 connects the opening transmission bar 221 and the closing transmission bar 222. The transmission wheel 300 includes a first transmission portion 310. The drive assembly 400 is used to drive the transmission wheel 300 to rotate in the same direction (e.g., ...). Figure 1 (in the direction of a), so that the first transmission part 310 engages or disengages with the door opening transmission bar 221 or the door closing transmission bar 222; when the first transmission part 310 engages with the door opening transmission bar 221, the top door part 210 extends to open the door body 800; when the transmission wheel 300 engages with the door closing transmission bar 222, the top door part 210 retracts.

[0045] The first transmission part 310 engages with the door opening transmission bar 221, driving the top door part 210 to extend and open the door body 800, thereby opening the door; the first transmission part 310 engages with the door closing transmission bar 222, driving the top door part 210 to retract, and the top door component 200 to reset, at which point the door body 800 can be manually closed; under the drive of the drive assembly 400, the transmission wheel 300 rotates in the same direction, which can realize the opening of the door and the reset of the top door component 200; when the first transmission part 310 is disengaged from the door opening transmission bar 221 and the door closing transmission bar 222, if the door opening device is de-energized and cannot drive the top door component 200 to reset, the top door component 200 is disengaged from the transmission wheel 300, and the top door component 200 is no longer restricted by the first transmission part 310, at which point the door body 800 can be manually closed, and the top door part 210 is retracted by the action of the door body 800, thus realizing the manual closing of the door body 800.

[0046] As the drive wheel 300 rotates in the same direction, when the first drive part 310 is engaged with the door opening drive bar 221, the first drive part 310 disengages from the door closing drive bar 222. With the rotation of the drive wheel 300, the door opening drive bar 221 extends, and the door-top part 210 extends accordingly to open the door body 800. When the door-top part 200 extends to its maximum stroke, the door body 800 is opened. At this point, the first drive part 310 disengages from the door opening drive bar 221, preventing the door opening drive bar 221 from extending further with the rotation of the drive wheel 300. When the first transmission part 310 is not yet engaged with the closing transmission bar 222, the transmission wheel 300 no longer restricts the movement of the top door member 200. If the transmission wheel 300 continues to rotate, the first transmission part 310 engages with the closing transmission bar 222, causing the closing transmission bar 222 to retract with the rotation of the transmission wheel 300, and the top door part 210 retracts accordingly until the top door member 200 retracts to the reset state. If the door opening device loses power, causing the top door member 200 to fail to reset, the door body 800 is manually closed, and the top door member 200 retracts under the action of the door body 800, thus realizing the manual closing of the door body 800.

[0047] It should be noted that when the top door component 200 extends to its maximum stroke, the top door portion 210 can be completely extended out of the base 100, or the top door portion 210 can be partially extended out of the base 100, as long as the extension length of the top door component 200 is sufficient to open the door body 800; when the top door component 200 is in the reset state, it means that the top door component 200 has retracted to its initial position. At this time, the top door portion 210 can be completely located within the base 100, or it can be partially extended out of the base 100. Figure 2 A schematic diagram of the door opening device when one of the top door components 200 is extended to its maximum stroke. Figure 1 This is a schematic diagram of the door opening device when one of the top door sections 210 protrudes.

[0048] This application achieves the reset of the top-opening door body 800 or the top-opening door component 200 by engaging the first transmission part 310 with the door opening transmission bar 221 or the door closing transmission bar 222. During this process, the transmission wheel 300 rotates in the same direction, that is, the motor of the drive assembly 400 does not need to reverse, simplifying the control logic. When the top-opening door component 200 is fully extended, the transmission wheel 300 no longer restricts the movement of the top-opening door component 200. At this time, if the door opening device loses power, the door can be closed manually. Through the cooperation between the first transmission part 310 and the door opening transmission bar 221 and the door closing transmission bar 222, this application allows the door body 800 to be closed manually when the door opening device fails to automatically reset due to power failure.

[0049] The door opening drive bar 221 and the door closing drive bar 222 are arranged opposite to each other. That is to say, during the process of the first drive unit 310 changing from the open state, which is engaged with the door opening drive bar 221, to the closed state, which is engaged with the door closing drive bar 222, the first drive unit 310 disengages from the door opening drive bar 221 and the door closing drive bar 222, thereby reducing the probability of the door failing to close due to power failure.

[0050] In some embodiments, at least one of the door opening drive bar 221 and the door closing drive bar 222 is along the extension direction of the top door portion 210 (e.g., Figure 1 The b-direction setting in the middle ensures that the top door 210 extends or retracts to a sufficient length, thereby minimizing the travel of the door opening drive bar 221 or the door closing drive bar 222.

[0051] Please see Figure 2 In some embodiments, the door opening drive bar 221 and the door closing drive bar 222 can both be arranged along the extension direction of the top door portion 210 to improve the efficiency of the top door portion 210 extending or retracting; two guide rails 110 can be arranged on the base, with the door opening drive bar 221 sliding on one guide rail 110 and the door closing drive bar 222 sliding on the other guide rail 110, which can guide the movement path of the door opening drive bar 221 and the door closing drive bar 222.

[0052] To reduce the risk of the top door component 220 tearing the door body 800 during the opening process, a rubber sleeve 250 can be installed at the end of the top door component 220.

[0053] Please see Figures 2 to 3In some embodiments, the first transmission part 310 is a wheel, and a first transmission tooth 311 is protruding from the periphery of the first transmission part 310. During the rotation of the transmission wheel 300, the first transmission part 310 can engage with the door opening transmission bar 221 or the door closing transmission bar 222 through the first transmission tooth 311. The length of the first transmission tooth 311 is less than the perimeter of the first transmission part 310, so that when the first transmission tooth 311 is engaged with one of the door opening transmission bar 221 and the door closing transmission bar 222, the second transmission tooth 224 disengages from the other of the door opening transmission bar 221 and the door closing transmission bar 222, so as to ensure that the top door member 200 can extend or retract smoothly, and avoid the phenomenon that the top door member 200 will jam due to the first transmission tooth 311 engaging with both the door opening transmission bar 221 and the door closing transmission bar 222 at the same time.

[0054] Please see Figures 2 to 3 In some embodiments, the length of the first transmission tooth 311 is less than the distance between the door opening transmission bar 221 and the door closing transmission bar 222. This allows the first transmission part 310 to disengage from the door opening state (engaged with the door opening transmission bar 221) to the door closing state (engaged with the door closing transmission bar 222) as much as possible during the process, thereby reducing the probability that the top door component 200 cannot retract due to power failure.

[0055] In some embodiments, the top door component 200 further includes a main body 220, with the top door portion 210 connected to the main body 220. The door opening drive bar 221 and the door closing drive bar 222 are disposed on the main body 220, which can improve the firmness of the connection between the door opening drive bar 221 and the door closing drive bar 222, reduce the probability of deformation of the door opening drive bar 221 or the door closing drive bar 222, and improve the stability of the movement of the top door component 200.

[0056] Please see Figures 2 to 3 In some embodiments, the main body 220 is provided with a movable groove 223, and the first transmission part 310 is disposed in the movable groove 223; the movable groove 223 has a first inner wall 223a and a second inner wall 223b disposed opposite to each other, the door opening transmission bar 221 is disposed in the first inner wall 223a, and the door closing transmission bar 222 is disposed in the second inner wall 223b.

[0057] Since the door opening drive bar 221 is located on the first inner wall 223a and the door closing drive bar 222 is located on the second inner wall 223b, the first drive unit 310 rotates within the movable groove 223. During rotation, the first drive unit 310 can engage with either the door opening drive bar 221 or the door closing drive bar 222, thereby causing the main body 220 to slide relative to the base 100, and consequently causing the top door component 200 to extend or retract. During the rotation of the first drive unit 310 within the movable groove 223, the first drive tooth 311 faces either the first inner wall 223a or the second inner wall 223b. When the first drive tooth 311 faces the first inner wall 223a, it engages with the door opening drive bar 221; when it faces the second inner wall 223b, it engages with the door closing drive bar 222. The transmission wheel 300 is rotatably connected to the base 100, and the first transmission part 310 rotates in the movable groove 223. The transmission wheel 300 can limit the travel of the top door member 200, so as to prevent the top door member 200 from extending or retracting too much and causing the top door member 200 to detach from the base 100.

[0058] Both the door opening drive bar 221 and the door closing drive bar 222 are provided with second drive teeth 224. Through the meshing of the first drive teeth 311 and the second drive teeth 224, the drive wheel 300 can drive the door opening drive bar 221 or the door closing drive bar 222 to move, thereby causing the top door member 200 to extend or retract. The main body 220 can be frame-shaped, and the length direction of the main body 220 is set along the extension direction of the top door member 200 to ensure that the door opening drive bar 221 or the door closing drive bar 222 has sufficient meshing length.

[0059] Please see Figures 1 to 2 In some embodiments, the door opening device further includes a first sensor 510, which is disposed on the base 100. When the top door member 200 is in a reset state, the top door member 200 triggers the first sensor 510, which determines that the top door member 200 is in a reset state. When the first sensor 510 detects that the top door member 200 is in a reset state, the drive assembly stops working.

[0060] In some embodiments, the first sensor 510 may be disposed at the end of the top door member 200 of the base 100 away from the opening 120. Specifically, the first sensor 510 may be disposed at the end of the base 100 opposite to the opening 120. If the first sensor 510 senses a positioning signal of the top door member 200, it indicates that the top door member 200 is in a reset state.

[0061] Please see Figures 1 to 2In some embodiments, the door opening device further includes a second sensor 520, which is disposed on the base 100. When the top door member 200 extends to its maximum stroke, the top door member 200 triggers the second sensor 520. The second sensor 520 can determine that the top door member 200 is extended, thereby determining that the top door member 200 has opened the door body 800. When the second sensor 520 detects that the top door member 200 is extended to its maximum stroke, the drive assembly continues to operate, causing the top door member 200 to retract and reset. The second sensor 520 ensures that the top door member 200 extends to its maximum stroke, thus guaranteeing that the door body 800 is opened.

[0062] A top door component 200 is disposed within a base 100, and an opening 120 is provided on the base 100. The top door component 200 extends through the opening 120 to open the door body 800. A second sensor 520 can be disposed close to the opening 120. When the top door component 200 is in the reset state, the second sensor 520 is considered to be disposed close to the opening 120 even when it is located between the opening 120 and the main body 220. When the main body 220 triggers the second sensor 520, it can be considered that the top door component 200 has moved to its maximum stroke, causing the door body 800 to be opened.

[0063] In some embodiments, the second sensor 520 may be disposed at the opening 120, that is, the distance between the second sensor 520 and the opening 120 is very close, so that the distance between them can be ignored.

[0064] Please see Figures 1 to 2 In some embodiments, the door opening device includes a first sensor 510 and a second sensor 520, which can be used to determine whether the top door component 200 is in a fully extended state or a reset state. Both the first sensor 510 and the second sensor 520 are microswitches.

[0065] Please see Figure 4In some embodiments, the base 100 is provided with a spring member 600, which is located in the retraction direction of the top door portion 210. The spring member 600 serves as a limiter. When the top door portion 200 is fully retracted, the top door portion 200 abuts against the spring member 600, thereby restricting the movement of the top door portion 200. If the reset top door portion 200 continues to retract and press against the spring member 600 due to inertia or other external forces, the elastic force of the spring member 600 can be used to push the top door portion 200 to move in the opposite direction to the reset state. The spring member 600 can restrict the top door portion 200 within a certain range of motion to ensure that the top door portion 200 can normally open the door body 800. Generally, the elastic member 600 can be a spring, and the main body 220 can be provided with a force-receiving column 225 on the side facing the elastic member 600. The diameter of the force-receiving column 225 is smaller than the diameter of the elastic member 600. When the top door member 200 abuts against the elastic member 600, the force-receiving column 225 is embedded inside the elastic member 600, which is beneficial for the elastic member 600 to apply force to the top door member 200. Figure 4 This is a schematic diagram of the door opening device when the elastic element 600 is in a compressed state.

[0066] Please see Figures 4 to 5 In some embodiments, the drive assembly 400 includes a drive wheel 410, a top door member 200, and a transmission wheel 300, with at least two of them, and the top door member 200 and the transmission wheel 300 corresponding to each other; multiple top door members 200 can be provided to open multiple doors 800; for example, two top door members 200 can be provided, namely a first top door member 230 and a second top door member 240, and correspondingly, two transmission wheels 300 can be provided, namely a first transmission wheel 330 and a second transmission wheel 340.

[0067] Please see Figures 4 to 5 In some embodiments, the drive wheel 410 includes a first engagement portion 411. The drive wheel 410 rotates in the same direction, such that the first engagement portion 411 engages with one of the transmission wheels 300 and disengages from the other transmission wheel 300. The drive wheel 410 can drive one of the transmission wheels 300 to rotate, thereby causing the corresponding top door member 200 to open the corresponding door body 800.

[0068] When the first engaging part 411 is engaged with the first transmission wheel 330, the first engaging part 411 disengages from the second transmission wheel 340, and the first transmission wheel 330 rotates under the drive of the first engaging part 411, causing the first door-opening member 230 to open the corresponding door body 800. When the first engaging part 411 is engaged with the second transmission wheel 340, the first engaging part 411 disengages from the first transmission wheel 330, and the second transmission wheel 340 rotates under the drive of the first engaging part 411, causing the second door-opening member 240 to open the corresponding door body 800. Through the engagement relationship between the first engaging part 411, the first transmission wheel 330, and the second transmission wheel 340, different door bodies 800 can be opened by rotating the drive wheel 410 in the same direction.

[0069] Please see Figure 5 In some embodiments, the transmission wheel 300 includes a second transmission part 320. The first transmission part 310 and the second transmission part 320 are connected and coaxially arranged so that the first transmission part 310 and the second transmission part 320 can rotate synchronously. The second transmission part 320 is a gear, and the second transmission part 320 can mesh with the first meshing tooth 411a so that the first meshing tooth 411a can drive the transmission wheel 300 to rotate.

[0070] Please see Figure 5 In some embodiments, the first engaging portion 411 is a wheel body, and a first engaging tooth 411a is protruding from the circumference of the first engaging portion 411, and the length of the first engaging tooth 411a is less than the circumference of the first engaging portion 411. During the rotation of the drive wheel 410, the first engaging portion 411 can engage with the door opening drive bar 221 or the door closing drive bar 222 through the first engaging tooth 411a; the length of the first engaging tooth 411a is less than the circumference of the first engaging portion 411, so that when the first engaging tooth 411a is engaged with one of the door opening drive bar 221 and the door closing drive bar 222, the second engaging tooth disengages from the other of the door opening drive bar 221 and the door closing drive bar 222, so as to ensure that the top door member 200 can extend or retract smoothly, and avoid the phenomenon that the top door member 200 will jam due to the first engaging tooth 411a engaging with both the door opening drive bar 221 and the door closing drive bar 222 at the same time.

[0071] In some embodiments, the length of the first engagement portion 411 is equal to the circumference of the second transmission portion 320, so that one engagement between the drive wheel 410 and the transmission wheel 300 can drive the transmission wheel 300 to rotate one revolution. One revolution of the transmission wheel 300 can push the top door member 200 to fully extend out of the top door body 800 and push the top door member 200 to reset.

[0072] The drive wheel 410 includes a second meshing portion 412, which is connected to and coaxially arranged with the first meshing portion 411, allowing the first meshing portion 411 and the second meshing portion 412 to rotate synchronously. The drive assembly 400 includes a motor that meshes with the second meshing portion 412, driving the second meshing portion 412 to rotate, thereby causing the first meshing portion 411 to rotate. The drive assembly 400 may include a reducer 413, which is connected to the motor and the second meshing portion 412, and the speed of the drive wheel 410 can be adjusted by the reducer 413. The second meshing portion 412 may be a gear.

[0073] like Figures 6 to 9 As shown, taking the first top door component 230 as an example; the drive wheel 410 rotates along the c direction, the first meshing tooth 411a faces the first transmission wheel 330, the first meshing tooth 411a meshes with the first transmission wheel 330, the first transmission wheel 330 rotates along the a direction, so that the first transmission tooth 311 of the first transmission wheel 330 meshes with the second transmission tooth 224 of the door opening transmission bar 221, thereby driving the first top door component 230 to extend; Figure 6 A schematic diagram of the door opening device with the first top door component 230 partially extended; Figure 7 This is a schematic diagram of the door opening device when the first door-top component 230 is fully extended. After the first door-top component 230 pushes open the corresponding door body 800, the first transmission wheel 330 continues to rotate, and the first meshing tooth 411a faces the second transmission wheel 340. The first meshing tooth 411a meshes with the second transmission wheel 340, and the second transmission wheel 340 rotates along direction a, so that the first transmission tooth 311 of the second transmission wheel 340 meshes with the second transmission tooth 224 of the closing transmission bar 222, thereby driving the second door-top component 240 to retract. Figure 8 A schematic diagram of the door opening device when the second top door component 240 is partially retracted; Figure 9 This is a schematic diagram of the door opening device when the second top door component 240 is fully retracted.

[0074] In some embodiments, the door opening device also includes an angle sensor mounted on the base 100. The angle sensor detects the angle of the drive wheel 410, facilitating its reset. For example, the angle sensor can be a Hall sensor. A magnet is mounted on the drive wheel 410, rotating with it. The Hall sensor detects changes in the magnetic field, thus detecting the rotation angle of the drive wheel 410. If a power outage occurs during use, causing the drive wheel 410 to deviate from its reset angle, it needs to be reset upon power restoration. The angle sensor determines the position of the drive wheel 410, controlling its rotation to the reset angle, thereby resetting the drive assembly.

[0075] In a second aspect of this application, an electrical device is provided, including a housing 700, a door 800, and an opening device according to any embodiment of the first aspect described above. The door 800 is rotatably connected to the housing 700. The opening device is installed on the housing and is used to drive the door 800 to rotate relative to the housing 700, so that the door 800 opens.

[0076] It is understood that if the door opening device has the beneficial effects of the above embodiments, then the electrical equipment will have the corresponding beneficial effects of the above embodiments. The specific implementation method can be referred to the above embodiments, and this application will not repeat it.

[0077] Among them, electrical appliances can be refrigerators, freezers, dishwashers, sterilizers, etc.

[0078] In a third aspect of this application, a method for resetting a door opening device is provided. Based on any embodiment of the first aspect, the drive assembly 400 includes a drive wheel 410, a top door member 200, and at least two transmission wheels 300, with the top door member 200 and the transmission wheels 300 corresponding to each other. The drive wheel 410 includes a first engagement portion 411, which rotates in the same direction, such that the first engagement portion 411 engages with one of the transmission wheels 300 and disengages from the other transmission wheel 300. The drive wheel 410 can drive one of the transmission wheels 300 to rotate, thereby causing the corresponding top door member 200 to open the corresponding door body 800.

[0079] Two door-mounting components 200 can be provided, namely a first door-mounting component 230 and a second door-mounting component 240. Correspondingly, two transmission wheels 300 are provided, namely a first transmission wheel 330 and a second transmission wheel 340. When the first engaging part 411 is engaged with the first transmission wheel 330, the first engaging part 411 disengages from the second transmission wheel 340, and the first transmission wheel 330 rotates under the drive of the first engaging part 411, causing the first door-mounting component 230 to open the corresponding door body 800. When the first engaging part 411 is engaged with the second transmission wheel 340, the first engaging part 411 disengages from the first transmission wheel 330, and the second transmission wheel 340 rotates under the drive of the first engaging part 411, causing the second door-mounting component 240 to open the corresponding door body 800. Through the engagement relationship between the first engaging part 411, the first transmission wheel 330, and the second transmission wheel 340, different door bodies 800 can be opened by rotating the drive wheel 410 in the same direction. Figure 10 A schematic diagram of the door opening device with the drive wheel 410 in the first reset angle; Figure 9 This is a schematic diagram of the door opening device when the drive wheel 410 is at the second reset angle.

[0080] When the drive wheel 410 is at its reset angle, the first engagement part 411 and the second transmission part 320 are arranged adjacent to each other, so that the rotation of the drive wheel 410 can drive the transmission wheel 300 to rotate, reducing the idle time of the drive wheel 410 and improving the response speed of the door opening device. If the door opening device experiences a power outage during use, and the drive wheel 410 deviates from its reset angle, it needs to be reset after power is restored. The reset position includes a first reset angle and a second reset angle, and the difference between the first reset angle and the second reset angle is 180 degrees. The angle information of the drive wheel 410 is set to be greater than or equal to 0 degrees and less than or equal to 180 degrees, the first reset angle is set to 0 degrees, and the second reset angle is set to 180 degrees.

[0081] The method includes:

[0082] Obtain the angle information of drive wheel 410;

[0083] If the difference between the angle information and the first reset angle is less than or equal to 90 degrees, then control the drive wheel 410 to rotate to the first reset angle;

[0084] If the difference between the angle information and the second reset angle is less than 90 degrees, then control the drive wheel 410 to rotate to the second reset angle;

[0085] By calculating the difference between the angle information and the first reset angle, and the difference between the angle information and the second reset angle, the drive wheel 410 is controlled to rotate to the correct reset angle, so as to reduce the rotation angle of the drive wheel 410 during the reset process and thus reduce the reset time.

[0086] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0087] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0088] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0089] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0090] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0092] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0093] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A door opening device characterized by comprising: The door opening device comprises: a base; a top door piece mounted on the base; the top door piece comprises a top door part, oppositely arranged door opening transmission bars and door closing transmission bars, the top door part is connected with the door opening transmission bars and the door closing transmission bars; a transmission wheel rotatably connected with the base; the transmission wheel comprises a first transmission part, the periphery of the first transmission part is provided with first transmission teeth, the length of the first transmission teeth is less than the distance between the door opening transmission bars and the door closing transmission bars; a driving assembly for driving the transmission wheel to rotate; wherein, when the driving assembly drives the transmission wheel to rotate in the same direction, the first transmission part is engaged with or disengaged from the door opening transmission bars or the door closing transmission bars; when the first transmission part is engaged with the door opening transmission bars, the top door part is extended to open the door body; when the transmission wheel is engaged with the door closing transmission bars, the top door part is retracted.

2. The door opening device according to claim 1, characterized in that The door opening transmission bars and / or the door closing transmission bars are arranged along the extension direction of the top door part.

3. The door opening device according to claim 1, characterized in that The first transmission part is a wheel body, and the length of the first transmission teeth is less than the circumference of the first transmission part.

4. The door opening device according to any one of claims 1 to 3, characterized in that The top door piece further comprises a main body part, the top door part is connected with the main body part, and the door opening transmission bars and the door closing transmission bars are arranged on the main body part.

5. The door opening device according to claim 4, characterized in that The main body part is provided with a movable groove, and the first transmission part is arranged in the movable groove; the movable groove has oppositely arranged first and second inner walls, the door opening transmission bars are arranged on the first inner wall, and the door closing transmission bars are arranged on the second inner wall.

6. The door opening device according to any one of claims 1 to 3, characterized in that The base is provided with an elastic piece; when the top door piece is in a reset state, the top door piece abuts against the elastic piece.

7. The door opening device according to any one of claims 1 to 3, characterized in that The driving assembly comprises a driving wheel, the top door piece and the transmission wheel are provided with at least two, and the top door piece and the transmission wheel correspond; the driving wheel comprises a first engagement part, and the driving wheel rotates in the same direction so that the first engagement part is engaged with one of the transmission wheels and disengaged from the other transmission wheel.

8. The door opening device according to claim 7, characterized in that The first engagement part is a wheel body, the periphery of the first engagement part is provided with first engagement teeth, and the length of the first engagement teeth is less than the circumference of the first engagement part.

9. The door opening device according to any one of claims 1 to 3, characterized in that The door opening device further comprises an angle sensor mounted on the base, and the angle sensor is used for detecting the angle of the driving wheel of the driving assembly.

10. An electrical appliance characterized by The door opening device comprises a box body, a door body and the door opening device according to any one of claims 1 to 9, the door body is rotatably connected with the box body; the door opening device is mounted on the box body and is used for driving the door body to rotate relative to the box body so that the door body is opened.

11. A method of resetting a door opening device, characterized by, The door opening device according to any one of claims 1 to 7, the driving assembly comprises a driving wheel, the top door piece and the transmission wheel are provided with at least two, and the top door piece and the transmission wheel correspond; the driving wheel comprises a first engagement part, and the driving wheel rotates in the same direction so that the first engagement part is engaged with one of the transmission wheels and disengaged from the other transmission wheel; the method comprises: obtaining the angle information of the driving wheel; If a difference between the angle information and a first reset angle is less than or equal to 90 degrees, the driving wheel is controlled to rotate to the first reset angle; If a difference between the angle information and a second reset angle is less than 90 degrees, the driving wheel is controlled to rotate to the second reset angle; The difference between the first reset angle and the second reset angle is 180 degrees.

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