A closing control method, an opening and closing mechanism, and a household appliance

Abstract

A closing control method, an opening and closing mechanism, and a household appliance. The closing control method will not pinch the user during the panel closing process, is safe and reliable, and has a good user experience. The closing control method includes a driving device with a duty cycle P n driving the panel to move in the closing direction; recording the running time T of the driving device and the current X at the current duty cycle; when T < T n , determining whether X ≥ X n or X < X n ; if T < T n and X ≥ X n , the panel has pinched an object, the driving device drives the panel to move in the opening direction, making i = i + 1, and repeating the above steps; if T < T n and X < X n , continue to record the running time T of the driving device and the corresponding current X at the current duty cycle; when T ≥ T n , determining whether X ≥ X n or X < X n ; if T ≥ T n and X < X n , the closing is abnormal, the driving device drives the panel to move in the opening direction, making i = i + 1, and repeating the above steps; if T ≥ T n and X ≥ X n , the panel is closed.

Description

Technical Field

[0001] The present invention relates to the technical field related to household appliances, and in particular to a closing control method, an opening and closing mechanism and a household appliance. Background Art

[0002] With the development of diversified household appliances, microwave ovens, ovens, steam ovens and other electrical appliances have emerged to meet the different needs of users. Taking the steam oven as an example, in order to facilitate the filling of water into the water tank, the water tank is usually set behind the control panel. When water needs to be filled, the control panel is opened, and after the water filling is completed, the control panel is closed. In order to facilitate user operation, control panels that can open and close automatically have appeared. They are highly intelligent, can provide users with a good user experience, and are easy for users to operate.

[0003] The existing control panel that can be opened and closed automatically uses a driving device to realize the opening and closing process of the control panel, and when the control panel is closed, the driving device is locked to detect whether the control panel is fully closed. However, during the closing process of the control panel, if the user is negligent, the control panel may be improperly closed, resulting in the user being pinched, which poses a certain degree of safety hazard. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the control panel is easy to pinch the user when closing and there are certain safety hazards, and to provide a closing control method, opening and closing mechanism and household appliance that will not pinch the user during the closing process, is safe and reliable, and has a good user experience.

[0005] In order to solve the above problem, the present invention provides a shutdown control method, comprising:

[0006] The drive device is driven with a duty cycle P n (n=1+i, i is a natural number and its initial value is 0) drives the panel to move in the closing direction;

[0007] Recording the running time T of the driving device and the current X corresponding to the current duty cycle;

[0008] When T<T n When X≥X n Or X<X n (n=1+i, i is a natural number and the initial value is 0), where T n Indicates the panel off time corresponding to the current duty cycle, X n is the corresponding stall current under the current duty cycle;

[0009] If T < T n And X ≥ X n, the panel is clamped by an object, and the driving device drives the panel to move in the opening direction, and i=i+1, and the above steps are repeated;

[0010] If T < T n And X<X n , then continue to record the running time T of the driving device and the current X corresponding to the current duty cycle;

[0011] When T ≥ T n When X≥X n Or X<X n ;

[0012] If T ≥ T n And X<X n , then the closing is abnormal, the driving device drives the panel to move in the opening direction, let i=i+1, and repeat the above steps;

[0013] If T ≥ T n And X ≥ X n , the panel is completely closed.

[0014] As a preferred technical solution of the above-mentioned closing control method, in the case where T<T n And X ≥ X n , the panel is clamped by an object, the driving device drives the panel to move in the opening direction, let i=i+1, repeat the above steps, and / or, in the step of if T≥T n And X<X n , if the closing is abnormal, the driving device drives the panel to move in the opening direction, let i=i+1, and repeat the above steps, the driving device drives the panel to move in the opening direction until the panel is fully opened.

[0015] As a preferred technical solution of the above-mentioned shutdown control method, the panel shutdown time T corresponding to the current duty cycle is n The value range is [T nmin ,T nmax ],in:

[0016] T nmin =(KG)×(FZ) / W;

[0017] T nmax =(K+G)×(F+Z) / W;

[0018] Wherein, K is the distance that the panel needs to move theoretically when the panel is completely closed;

[0019] G is the absolute value of the tolerance of each component of the system;

[0020] F is the output P of the drive device n The force theoretically applied by the driving device to the panel when the duty cycle is ?

[0021] Z is the change in system resistance;

[0022] W is the output P of the drive device n Duty cycle, the power of the driving device.

[0023] As a preferred technical solution of the above-mentioned closing control method, when T<T n When X≥X n Or X<X n (n=1+i, i is a natural number and the initial value is 0), where T n Indicates the panel off time corresponding to the current duty cycle, X n is the step of the locked-rotor current corresponding to the current duty cycle, when T<T nmin When X≥X n Or X<X n (n=1+i, i is a natural number and the initial value is 0), where T n Indicates the panel off time corresponding to the current duty cycle, X n It is the stall current corresponding to the current duty cycle.

[0024] As a preferred technical solution of the above-mentioned closing control method, in the case where T<T n And X ≥ X n , the panel is clamped by an object, and the driving device drives the panel to move in the opening direction. Let i=i+1, and repeat the above steps. If T<T nmin And X ≥ X n , the panel is clamped by an object, and the driving device drives the panel to move in the opening direction, and let i=i+1, and repeat the above steps.

[0025] As a preferred technical solution of the above-mentioned closing control method, in the case where T<T n And X<X n , then continue to record the running time T of the driving device and the current X corresponding to the current duty cycle, if T<T nmin And X<X n , then continue to record the running time T of the driving device and the current X corresponding to the current duty cycle.

[0026] As a preferred technical solution of the above-mentioned shutdown control method, when T≥T n When X≥X n Or X<X n In the step of nmaxWhen X≥X n Or X<X n .

[0027] As a preferred technical solution of the above-mentioned shutdown control method, in the case where T ≥ T n And X<X n , the closing is abnormal, the driving device drives the panel to move in the opening direction, let i = i + 1, repeat the above steps, if T ≥ T nmax And X<X n , then the closing is abnormal, the driving device drives the panel to move toward the opening direction, let i=i+1, and repeat the above steps.

[0028] As a preferred technical solution of the above-mentioned shutdown control method, in the case where T ≥ T n And X ≥ X n , then the panel is completely closed in the step, if T ≥ T nmax And X ≥ X n , the panel is completely closed.

[0029] An opening and closing mechanism for executing the above closing control method, the opening and closing mechanism is arranged on the mounting plate of the household appliance, and is used to drive the panel to open and close, and the opening and closing mechanism comprises:

[0030] The driving mechanism is arranged on the mounting plate, and the driving end of the driving mechanism is connected to the panel and drives the panel to move back and forth in a straight line.

[0031] As an optimal technical solution for the above-mentioned opening and closing mechanism, the driving mechanism includes a driving device and a push-pull member, one end of the push-pull member is connected to the driving end of the driving device, and the other end is connected to the panel, and the driving device drives the push-pull member and the panel to move back and forth in a straight line.

[0032] As a preferred technical solution of the above-mentioned opening and closing mechanism, the driving mechanism further includes a slider, the slider is connected to the driving end, and one end of the push-pull member is connected to the slider.

[0033] A household appliance comprises a housing and a mounting plate arranged on the upper surface of the housing, wherein the mounting plate is provided with the above-mentioned opening and closing mechanism.

[0034] As a preferred technical solution of the above household appliance, the household appliance is a steam oven.

[0035] The technical solution of the present invention has the following advantages:

[0036] (1) The shutdown control method provided by the present invention includes: a driving device with a duty cycle P n(n=1+i, i is a natural number and its initial value is 0) drives the panel to move in the closing direction; records the running time T of the driving device and the corresponding current X under the current duty cycle; when T<T n When X≥X n Or X<X n (n=1+i, i is a natural number and the initial value is 0), where T n Indicates the panel off time corresponding to the current duty cycle, X n is the corresponding stall current under the current duty cycle; if T<T n And X ≥ X n , the panel is clamped by an object (such as the user's hand), and the driving device drives the panel to move in the opening direction, and i=i+1, and the above steps are repeated; if T<T n And X<X n , then continue to record the running time T of the drive device and the corresponding current X under the current duty cycle; when T ≥ T n When X≥X n Or X<X n ; if T ≥ T n And X<X n , then the closing is abnormal, the driving device drives the panel to move in the opening direction, let i=i+1, and repeat the above steps; if T≥T n And X ≥ X n , the panel is completely closed. In the above closing control method, during the entire closing process, a smaller force is initially used to close the panel. If the user is touched, the panel will be reversed so that the user will not be pinched. In this process, multiple attempts will be made, which is equivalent to multiple reminders for the user to avoid pinching the user. The use of progressive pulling and multiple judgment control logic can not only play the role of multiple reminders, but also avoid using the maximum duty cycle drive every time, reduce the wear of the system during long-term use, greatly reduce the probability of pinching the user during the panel closing process, improve the safety of the user during use, eliminate safety hazards, and improve the user experience.

[0037] (2) The shutdown control method provided by the present invention, wherein the panel shutdown time T corresponding to the current duty cycle n The value range is [T nmin ,T nmax ], fully considering the changes in system resistance and system manufacturing tolerances, making the closing control method more in line with actual conditions, improving the accuracy of the closing control method, and providing a better user experience.

[0038] (3) The opening and closing mechanism provided by the present invention is arranged on the mounting plate of the household appliance, and is used to drive the panel to open and close. The opening and closing mechanism includes a driving mechanism, which is arranged on the mounting plate. The driving end of the driving mechanism is connected to the panel and drives the panel to move back and forth in a straight line. This opening and closing mechanism can avoid pinching the user during the closing process of the panel, improve the safety of the user during use, eliminate safety hazards, and enhance the user experience.

[0039] (4) The household appliance provided by the present invention comprises a housing and a mounting plate arranged on the upper surface of the housing, and the mounting plate is provided with the opening and closing mechanism of the present invention. This household appliance can effectively prevent users from being pinched during the panel closing process, improve the safety of the appliance, meet the user's use needs, and enhance the user's use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A flowchart of a closing control method of the present invention;

[0042] Figure 2 is a schematic diagram of the opening and closing mechanism of the present invention;

[0043] Figure 3 It is a side sectional view of the opening and closing mechanism of the present invention.

[0044] Description of reference numerals:

[0045] 1. Mounting plate; 2. Panel; 301. Driving device; 302. Push-pull member; 3021. Push-pull rod; 3022. Connecting plate; 303. Slider; 4. Front frame. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0050] like Figure 1 The figure shows a preferred embodiment of the closing control method of the present invention. The closing control method can be applied to household appliances such as steam ovens that need to close the panel or door panel. The closing control method can greatly reduce the probability of the user being caught during the panel closing process, improve the safety of the user during use, eliminate potential safety hazards, and improve the user experience.

[0051] This closing control method is applied to the opening and closing mechanism, and the opening and closing mechanism executes the closing control method. Figure 2-3 As shown, the opening and closing mechanism is arranged on the mounting plate 1 of the household appliance, and is used to drive the panel 2 to open and close. The mounting plate 1 is usually a plate-like structure arranged on the top of the household appliance. In this embodiment, the mounting plate 1 is arranged horizontally. The panel 2 can be a control panel or other functional panel or door panel, etc., and the present invention is not limited to this. In this embodiment, the panel 2 is a control panel.

[0052] Specifically, the opening and closing mechanism includes a driving mechanism, which is disposed on the mounting plate 1, and a driving end of the driving mechanism is connected to the panel 2, and drives the panel 2 to move linearly back and forth. Figure 3As shown by the arrow in the middle, the panel 2 can be driven by the driving mechanism to move horizontally and linearly back and forth in the left and right directions, and move to the right for opening and move to the left for closing. In this embodiment, the driving mechanism drives the panel 2 to move horizontally and linearly back and forth and open and close relative to the front frame 4. The front frame 4 is vertically arranged with the mounting plate 1, and the front frame 4 is connected to one end of the mounting plate 1, as shown in FIG. Figure 2 As shown, in this embodiment, the front frame 4 is connected to the right end of the mounting plate 1.

[0053] Furthermore, the driving mechanism includes a driving device 301 and a push-pull member 302. One end of the push-pull member 302 is connected to the driving end of the driving device 301, and the other end is connected to the panel 2. The driving device 301 drives the push-pull member 302 and the panel 2 to move linearly back and forth. The driving device 301 can be a motor, and the purpose of driving the panel 2 to move horizontally and linearly is achieved through the forward and reverse rotation of the motor. At this time, the driving end of the driving device 301 is the output shaft of the motor.

[0054] The push-pull member 302 includes a connecting plate 3022 and two push-pull rods 3021, the two push-pull rods 3021 are arranged at intervals from each other, the connecting plate 3022 is placed between the two push-pull rods 3021, and the two sides of the connecting plate 3022 are respectively connected to the two push-pull rods 3021 to form an integral structure. Specifically, the push-pull member 302 is arranged in a horizontal direction, that is, parallel to the moving direction of the panel 2, the connection between the push-pull member 302 and the panel 2 is close to the edge of the panel 2, and the connection between the two push-pull members 302 and the panel 2 is symmetrical relative to the midline of the panel 2, so as to apply a balanced and stable push-pull force to the panel 2. The two push-pull members 302 and the panel 2 form a frame structure, the connecting plate 3022 is placed in the frame structure, and the connecting plate 3022 is arranged close to the side away from the panel 2, and the area of ​​the frame structure is larger than the area of ​​the connecting plate 3022. Furthermore, the driving device 301 has a certain length, and its length direction is parallel to the setting direction of the push-pull member 302. The driving device 301 is set below the push-pull member 302, and the driving device 301 and the push-pull member 302 have a certain distance in the vertical direction.

[0055] Furthermore, the driving mechanism further includes a slider 303, the slider 303 is connected to the driving end of the driving device 301, and one end of the push-pull member 302 is connected to the slider 303. Specifically, the bottom surface of the slider 303 is connected to the driving end of the driving device 301, and the top surface of the slider 303 is connected to one end of the push-pull member 302. In order to facilitate the structural arrangement, the slider 303 is located between the two push-pull rods 3021, so the top surface of the slider 303 is connected to the connecting plate 3022.

[0056] The shutdown control method of this embodiment includes:

[0057] Step SO1, the driving device is driven at a duty cycle Pn (n=1+i, i is a natural number and its initial value is 0) drives the panel 2 to move in the closing direction;

[0058] In this step, when the panel 2 is closed, the driving device, i.e., the motor, rotates forward, n=1, and the driving device rotates at a duty cycle P 1 Drive panel 2 to move in the closing direction, the closing direction is Figure 3 Left arrow direction.

[0059] Step SO2, recording the running time T of the driving device and the current X corresponding to the current duty cycle;

[0060] The running time T of the driving device is the running time of the motor after the motor starts, and the current X corresponding to the current duty cycle is, in this embodiment, the current X corresponding to the duty cycle P. 1 The corresponding motor current is as follows.

[0061] Step SO3, when T<T n When X≥X n Or X<X n (n=1+i, i is a natural number and the initial value is 0), where T n Indicates the panel off time corresponding to the current duty cycle, X n is the corresponding stall current under the current duty cycle;

[0062] Set P 1 <P 2 <……<P n <P z , the corresponding X 1 <X 2 <……<X n <X z , corresponding to T 1 >T 2 >……>T n >T z ,in,

[0063] P z For motor output 100% duty cycle, X z When the motor output is 100% duty cycle, the current is locked current value, T z The time when the motor outputs 100% duty cycle corresponds to the time when the panel is closed.

[0064] When T<T 1 When , it means that theoretically the closing time has not yet been reached, and the current corresponding to the current duty cycle is judged to be X ≥ X n Or X<X n , at this time n=1, that is, judge X≥X 1 Or X<X 1 , X1 It is the locked-rotor current value corresponding to the current duty cycle.

[0065] Step SO4, if T<T n And X ≥ X n , the panel is clamped by an object, and the driving device drives the panel 2 to move in the opening direction, and i=i+1, and the above steps are repeated;

[0066] In this step, if T<T 1 And X ≥ X 1 , the panel is clamped by an object, which may be the user's finger, etc. The driving device, i.e., the motor, reverses and drives the panel 2 to move in the opening direction. The opening direction is Figure 3 In the direction of the right arrow, the clamped object is released, and i=i+1 is set, and the above steps S01-S04 are repeated.

[0067] Preferably, the driving device drives the panel 2 to move in the opening direction until the panel 2 is fully opened, so as to ensure that the clamped object can be fully released.

[0068] Step SO5, if T<T n And X<X n , then continue to record the running time T of the drive device and the current X corresponding to the current duty cycle;

[0069] In this step, if T<T 1 And X<X 1 , it means that the panel has not clamped any object, and continues to record the running time T of the drive device and the corresponding current X under the current duty cycle.

[0070] Step SO6, when T ≥ T n When X≥X n Or X<X n ;

[0071] When T ≥ T 1 When X≥X 1 Or X<X 1 , X 1 It is the locked-rotor current value corresponding to the current duty cycle.

[0072] Step SO7, if T ≥ T n And X<X n , then the closing is abnormal, the driving device drives the panel 2 to move in the opening direction, let i=i+1, and repeat the above steps;

[0073] In this step, if T ≥ T 1 And X<X 1, it means that the panel is closed abnormally, the driving device, that is, the motor reverses, driving the panel 2 to move in the opening direction, and the opening direction is Figure 3 In the direction of the right arrow, the clamped object is released, and i=i+1 is set, and the above steps S01-S07 are repeated.

[0074] Preferably, the driving device drives the panel 2 to move in the opening direction until the panel 2 is fully opened.

[0075] Step SO8, if T ≥ T n And X ≥ X n , then panel 2 is completely closed.

[0076] In this step, if T ≥ T 1 And X ≥ X 1 , it means that panel 2 has been closed in place, that is, panel 2 is completely closed.

[0077] That is to say,

[0078] Only if the condition ①T<T n When X<X n ; and conditions

[0079] ②T≥T n When X≥Xn, the panel is judged to be closed normally.

[0080] Through the logic control of the above closing control method, the probability of the user being pinched during the panel closing process can be reduced, the safety of the user during use can be improved, potential safety hazards can be eliminated, and the user experience can be improved.

[0081] Furthermore, when the opening and closing mechanism is used for a long time, the system resistance will change, and the system manufacturing also has tolerances, which will lead to different panel movement speeds and inconsistent panel closing strokes, etc. Therefore, it is necessary to adjust the T n Make corrections.

[0082] The panel off time T corresponding to the current duty cycle n The value range is [T nmin ,T nmax ], where: T nmin =(KG)×(FZ) / W;

[0083] T nmax =(K+G)×(F+Z) / W;

[0084] in,

[0085] T nmin The motor output P n The minimum value of the panel closing time corresponding to the duty cycle;

[0086] Tnmax The motor output P n The maximum value of the panel closing time corresponding to the duty cycle;

[0087] K is the distance that panel 2 theoretically needs to move when the panel is completely closed;

[0088] G is the absolute value of the tolerance of each component of the system;

[0089] F is the output of the drive device P n The duty cycle is the theoretical force applied by the drive device to the panel 2; Z is the change in the system resistance;

[0090] W is the output of the drive device P n The duty cycle is the power of the driving device.

[0091] The derivation process is as follows:

[0092] Since T=S / V

[0093] And we can know that S=K±G

[0094] From W = Q × V, we know that V = W / Q

[0095] And we know that Q=F±Z

[0096] Then V=W / (F±Z)

[0097] Therefore, T = (K ± G) / [W / (F ± Z)] = (K ± G) × (F ± Z) / W

[0098] Then T nmin =(KG)×(FZ) / W,T nmax =(K+G)×(F+Z) / W.

[0099] in,

[0100] S is the distance the panel actually needs to move when it is closed;

[0101] Q is the output of the drive device P n Duty cycle, corresponds to the actual force applied by the driver to the panel; V is the output P of the driver n The speed at which the panel moves when the duty cycle is set.

[0102] From the above process, we can know that T nmin ≤T n ≤T nmax , so in theory, T n It is feasible as a time judgment condition.

[0103] Taking into account changes in system resistance and system manufacturing tolerances:

[0104] In T<T n When T nmin ≤T n , so in time period T nmin -T n , it is possible that the panel is already in place, that is, X ≥ X n , resulting in an error in judgment, so at this time T n Press T nmin To control, T n Take T nmin , that is, T<T nmin When X<X n ;

[0105] Similarly, when T ≥ T n When T n ≤T nmax , so in time period T n -T nmax , there may be a situation where the panel is not in place, that is, X<X n , resulting in an error in judgment, so at this time T n Press T nmax To control, T n Take T nmax , that is, T ≥ T nmax , X≥Xn.

[0106] In summary, taking into account the changes in system resistance and system manufacturing tolerance, the following conditions are met: ①T<T nmin When X<X n ; and conditions

[0107] ②T≥T nmax When X ≥ X n , the panel judges to be closed normally.

[0108] This embodiment also provides a household appliance, including a housing and a mounting plate 1 arranged on the upper surface of the housing, the mounting plate 1 is provided with an opening and closing mechanism provided in this embodiment, and a panel 2 is also provided on one side of the upper surface of the housing, and the panel 2 is a control panel. In this embodiment, the household appliance is a steam oven, and a water tank is arranged behind the panel 2. When water needs to be filled into the water tank, the panel 2 needs to be opened, and the panel 2 needs to be closed after the water filling is completed. Of course, the steam oven also has other structures and components that existing steam ovens have, and since the present invention does not involve these structures and components, they are not described in detail.

[0109] During the closing process of the panel 2 of this household appliance, it is possible to effectively prevent users from being pinched, thereby improving the safety of the appliance, satisfying the needs of users, and enhancing the user experience.

[0110] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A closing control method, characterized in that, comprising: The driving device operates at a duty cycle P n , where n = 1 + i, i is a natural number with an initial value of 0, and drives the panel (2) to move in the closing direction; recording the running time T of the driving device and the corresponding current X at the current duty cycle; When T < T n , determine whether X ≥ X n or X < X n , n = 1 + i, where i is a natural number and its initial value is 0, and T n represents the panel off-time corresponding to the current duty cycle, and X n is the locked-rotor current corresponding to the current duty cycle; If T < T n and X ≥ X n , then the panel clamps the object, the driving device drives the panel (2) to move in the opening direction, makes i = i + 1, and repeats the above steps; If T < T n and X < X n , then continue to record the running time T of the drive device and the corresponding current X at the current duty cycle; When T≥T n , determine whether X≥X n or X<X n ; If T≥T n and X<X n , then the abnormality is closed, the driving device drives the panel (2) to move in the opening direction, making i = i + 1, and the above steps are repeatedly executed; If T ≥ T n and X ≥ X n , then the panel (2) is fully closed.

2. The closing control method according to claim 1, characterized in that, In the case where T < T n and X ≥ X n , the panel clamps the object, and the driving device drives the panel (2) to move in the opening direction, making i = i + 1, and repeating the above steps. And / or, in the case where T ≥ T n and X < X n , a closing abnormality occurs, and the driving device drives the panel (2) to move in the opening direction, making i = i + 1, and repeating the above steps. The driving device drives the panel (2) to move in the opening direction until the panel (2) is fully opened.

3. The closing control method according to claim 1, characterized in that, The panel turn-off time T corresponding to the current duty cycle n has a value range of [T nmin , T nmax , where: T nmin =(K - G)×(F - Z) / W; T nmax =(K + G) × (F + Z) / W; wherein, K is the distance that the panel (2) needs to move theoretically when the panel is completely closed; G is the absolute value of the tolerance of each component of the system; F is the force that the driving device outputs at a duty cycle of P n When the duty cycle is applied, theoretically, the force applied by the driving device to the panel (2); Z is the change value of the system resistance; W is the power of the drive device when outputting P n duty cycle.

4. The closing control method according to claim 3, characterized in that, When T < T n , determine whether X ≥ X n or X < X n , n = 1 + i, where i is a natural number with an initial value of 0. Here, T n represents the panel turn-off time corresponding to the current duty cycle, and X n is the locked-rotor current corresponding to the current duty cycle. In the step where when T < T nmin , determine whether X ≥ X n or X < X n , n = 1 + i, where i is a natural number with an initial value of 0. Here, T n represents the panel turn-off time corresponding to the current duty cycle, and X n is the locked-rotor current corresponding to the current duty cycle.

5. The closing control method according to claim 4, characterized in that, In the case where T < T n and X ≥ X n , the panel clamps the object, and the driving device drives the panel (2) to move in the opening direction, making i = i + 1. In the step of repeating the above steps, if T < T nmin and X ≥ X n , the panel clamps the object, and the driving device drives the panel (2) to move in the opening direction, making i = i + 1, and repeating the above steps.

6. The closing control method according to claim 4, characterized in that, In the step of continuing to record the running time T of the driving device and the current X corresponding to the current duty ratio if T < T n and X < X n , in the step of continuing to record the running time T of the driving device and the current X corresponding to the current duty ratio, if T < T nmin and X < X n , then continue to record the running time T of the driving device and the current X corresponding to the current duty ratio.

7. The closing control method according to claim 3, characterized in that, In the step of determining whether X≥X n or X<X n when T≥T n in the step of determining whether X≥X nmax or X<X n when T≥T n .

8. The closing control method according to claim 7, characterized in that, In the case where T≥T n and X<X n , the abnormality is closed, the driving device drives the panel (2) to move in the opening direction, let i = i + 1, and in the step of repeating the above steps, if T≥T nmax and X<X n , the abnormality is closed, the driving device drives the panel (2) to move in the opening direction, let i = i + 1, and repeat the above steps.

9. The closing control method according to claim 7, characterized in that, In the step where if T≥T n and X≥X n , then in the step where the panel (2) is fully closed, if T≥T nmax and X≥X n , then the panel (2) is fully closed.

10. An opening and closing mechanism for implementing the closing control method according to any one of claims 1-9, characterized in that, the opening and closing mechanism is arranged on the mounting plate (1) of the household appliance and is used to drive the panel (2) to open and close. The opening and closing mechanism includes: a driving mechanism arranged on the mounting plate (1), the driving end of the driving mechanism is connected to the panel (2), and drives the panel (2) to move linearly back and forth.

11. The opening and closing mechanism according to claim 10, characterized in that, the driving mechanism includes a driving device (301) and a pushing and pulling member (302). One end of the pushing and pulling member (302) is connected to the driving end of the driving device (301), and the other end is connected to the panel (2). The driving device (301) drives the pushing and pulling member (302) and the panel (2) to move linearly back and forth.

12. The opening and closing mechanism according to claim 11, characterized in that, the driving mechanism further includes a slider (303), the slider (303) is connected to the driving end, and one end of the pushing and pulling member (302) is connected to the slider (303).

13. A household appliance, characterized in that, comprising a housing and a mounting plate (1) arranged on the upper surface of the housing, and the mounting plate (1) is provided with the opening and closing mechanism according to any one of claims 10-12.

14. The household appliance according to claim 13, characterized in that, the household appliance is a steam oven.

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