Cooking equipment and panel opening and closing control device and opening control method thereof

Abstract

The present invention relates to a cooking device and a panel opening and closing control device and an opening control method thereof, wherein the opening control method comprises: receiving a panel opening signal; controlling a driving mechanism to gradually push the panel to open with a duty cycle that increases step by step; controlling the driving mechanism to gradually push the panel to open with a duty cycle that increases step by step comprises: the driving mechanism pushes the panel with a set duty cycle, and judging whether the current actual stall current of the driving mechanism is less than the stall current threshold: if so, controlling the driving mechanism to continue pushing the panel with the current duty cycle until judging that the panel has been opened in place and stopping the driving; if not, controlling the driving mechanism to restart and push the panel with a duty cycle of the next level greater than the current duty cycle. The present invention controls the driving mechanism to gradually push the panel with a gradually increasing duty cycle during the panel opening process, which can effectively avoid the problem that the driving mechanism pushes the panel with the maximum duty cycle and is prone to mechanical jamming, high misjudgment rate, and low opening success rate.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking equipment, and in particular to a cooking equipment and a panel opening and closing control device and an opening control method thereof. Background Art

[0002] With the popularization of smart home appliances, more and more smart home appliances have entered users' homes, and many home appliances are equipped with panels that can be opened and closed automatically for easy operation by users. For example, in order to save space in the cooking chamber and facilitate water tank filling, existing steam ovens often hide the water tank behind an automatically opened and closed panel located above the cooking chamber, so that the water tank can be taken out without opening the oven door.

[0003] In the prior art, the control panel is automatically opened by a driving mechanism, and the panel is generally detected in place during the opening process by blocking the driving mechanism. However, due to extreme temperatures or long-term use, the moving parts of the driving mechanism and the panel are prone to adhesion due to thermal expansion and contraction, or are prone to wear and tear due to long-term use, which increases the friction resistance and easily causes blocking. This will cause the control system of the steam oven to misjudge that the panel has been fully opened, but in fact it is not fully opened, making it impossible to remove the water tank, resulting in a poor user experience. In addition, since the static friction resistance that the panel needs to overcome initially when opening is the largest, and the driving mechanism in the prior art directly drives the panel to open at a maximum duty cycle, it is very easy to cause mechanical jamming, resulting in a low opening success rate. 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 driving mechanism of the cooking equipment directly drives the panel to open with the maximum duty cycle, which is prone to mechanical jamming, resulting in the panel being stuck, and having a low opening success rate and a high misjudgment rate, thereby providing a panel opening control method for the cooking equipment that avoids using a stall to detect whether the panel is fully opened, is not prone to mechanical jamming, has a high panel opening success rate and a low misjudgment rate.

[0005] In order to solve the above problems, in a first aspect, an embodiment of the present invention provides a panel opening control method for a cooking device, the opening control method comprising:

[0006] After receiving the panel opening signal, the control driving mechanism gradually pushes the panel to open with a duty cycle that increases step by step; wherein, the control driving mechanism gradually pushes the panel to open with a duty cycle that increases step by step specifically includes: controlling the driving mechanism to push the panel with a set duty cycle, and judging whether the current actual stall current of the driving mechanism is less than the set stall current threshold: if so, the control driving mechanism continues to push the panel with the current duty cycle until it is judged that the panel has been opened in place, and the control driving mechanism stops driving; if not, the control driving mechanism restarts and pushes the panel with a duty cycle of the next level greater than the current duty cycle; wherein, the stall current threshold is the current threshold when the driving mechanism is operating normally, and the stall current threshold corresponding to different duty cycles of the driving mechanism is different.

[0007] Optionally, the control driving mechanism continues to push the panel at the current duty cycle until it is determined that the panel has been fully opened, and the control driving mechanism stops driving. Specifically, the control driving mechanism stops driving by detecting an actual stall current of the driving mechanism in real time while the driving mechanism continues to push the panel to open at the current duty cycle; and determining whether the actual stall current reaches the stall current threshold: if so, it can be inferred that the panel has been fully opened and the driving stops; if not, it can be inferred that the panel has not been fully opened and the panel continues to be pushed.

[0008] Optionally, after receiving the panel opening signal, the following steps are specifically performed: the driving mechanism is controlled to start pushing the panel open with a set first duty cycle P1, and at the same time, the actual stall current X1′ of the driving mechanism is obtained; it is determined whether the actual stall current X1′ is less than the set first stall current threshold X1: if so, the driving mechanism is controlled to continue pushing the panel with the first duty cycle P1 until it is determined that the actual stall current X1′ of the driving mechanism reaches the first stall current threshold X1, then it can be inferred that the panel has been opened in place, and the driving mechanism is controlled to stop driving; if not, the driving mechanism is controlled to restart and push the panel with a second duty cycle P2 that is greater than the first duty cycle P1.

[0009] Optionally, the first duty cycle P1<50%, P1<P2<100%.

[0010] Optionally, when the driving mechanism starts to push the panel at the second duty cycle P2, the following steps are further performed:

[0011] Obtain the current actual stall current X2′ of the driving mechanism, and compare the actual stall current X2′ with the second stall current threshold value X2: if it is judged that X2′<X2, the driving mechanism continues to push the panel with the second duty cycle P2, until it is judged that the actual stall current X2′ of the driving mechanism reaches the second stall current threshold value X2, and the driving mechanism is controlled to stop driving; if it is judged that X2′≥X2, the driving mechanism is controlled to stop driving, and push the panel again with the duty cycle Px, where 100%≥Px>P2.

[0012] Optionally, it is set that: Pn is the output duty cycle of the driving source of the driving mechanism, Xn is the corresponding stall current threshold value when the driving mechanism outputs the Pn duty cycle, and Xn′ is the stall current AD value actually detected when the driving source outputs the Pn duty cycle; Pz is the output 100% duty cycle of the driving source of the driving mechanism, Xz is the corresponding stall current threshold value when the driving source outputs the 100% duty cycle, and Xz′ is the stall current AD value actually detected when the driving source outputs the Pz duty cycle; P1<……<Pn<Pz, corresponding to X1<……<Xn <Xz, where n≥2; after receiving the panel opening signal, the driving source of the driving mechanism is controlled to push the panel with a duty cycle that increases step by step from P1, ..., Pn to Pz; in the process of the driving source pushing with different levels of duty cycles from P1, ..., Pn, the following steps are performed respectively: determine whether Xn′ corresponding to the current level of duty cycle is less than Xn: if so, the driving mechanism continues to push the panel until it is determined that Xn′=Xn, then it can be inferred that the panel has been opened in place, and the driving mechanism is controlled to stop driving; if not, the driving mechanism is controlled to stop pushing the panel with the current level of duty cycle, and push the panel again with the next level of duty cycle.

[0013] Optionally, when the driving source of the driving mechanism starts to push the panel with a Pz duty cycle, the following steps are performed:

[0014] Determine whether Xz′ is less than Xz: if so, the driving mechanism continues to push the panel until it is determined that Xz′= Xz, then it can be inferred that the panel has been fully opened, and the driving mechanism is controlled to stop driving; if not, the cooking device is controlled to issue a fault alarm reminder.

[0015] Optionally, n=4, P1 is 40%, P2 is 55%, P3 is 70%, and P4 is 85%.

[0016] In a second aspect, an embodiment of the present invention further provides a panel opening and closing control device, which is controlled by the above-mentioned panel opening control method of the cooking device, and the panel opening and closing control device includes: a receiving unit, used to receive a panel opening signal; an acquisition unit, used to acquire an actual stall current of a driving mechanism; a comparison unit, used to compare the actual stall current with a set stall current threshold; a control unit, used to control whether the driving mechanism stops driving and / or whether to push the panel again with a duty cycle of the next level according to the comparison result of the comparison unit; wherein the stall current threshold is the current threshold when the driving mechanism is operating normally, and different duty cycles output by the driving mechanism correspond to different stall current thresholds.

[0017] In a third aspect, an embodiment of the present invention further provides a cooking device, comprising the above-mentioned panel opening and closing control device of the cooking device.

[0018] The present invention has the following advantages:

[0019] 1. The panel opening control method provided in the embodiment of the present invention is that during the panel opening process, the driving mechanism gradually pushes the panel to open with a duty cycle that increases step by step. The initial driving force of the driving mechanism is relatively small, as long as it can push the panel, and it gradually increases, so that the panel is not easy to get stuck when it is opened, which greatly improves the probability of successful opening of the panel, facilitates users to take the water tank, and improves user experience. In addition, when the driving mechanism starts to push the panel with different levels of duty cycles each time, the application first determines whether the current actual stall current is less than the set stall current threshold. When it is determined that the actual stall current is greater than the stall current threshold, it will not alarm, but push the panel again with the next level of duty cycle. The possibility of misjudging that the panel has been opened in place is relatively small, which effectively solves the problem in the prior art that the driving mechanism pushes the panel with the maximum duty cycle, the panel is easy to get stuck due to the large driving force, resulting in a low success rate and a high misjudgment rate of panel opening.

[0020] 2. The panel opening control method provided in the embodiment of the present invention, after receiving the panel opening signal, controls the driving source of the driving mechanism to push the panel with a duty cycle that increases step by step from P1, ..., Pn to Pz, and in the process of the driving source pushing with different levels of duty cycles of P1, ..., Pn, respectively executes a judgment step of judging whether the stall current AD value actually detected at the current level of duty cycle is less than the stall current threshold. By using a progressively pushing panel and multiple judgment control logics, when the moving parts of the driving mechanism and the panel expand and contract due to thermal expansion and contraction and produce adhesion, the adhesion position can be separated little by little, and the matching deviation and misalignment will gradually return to their original position without being directly stuck, thereby greatly improving the success rate of panel opening and thus improving the user experience.

[0021] 3. The panel opening control method provided in the embodiment of the present invention, when the driving source of the driving mechanism pushes the panel with the maximum duty cycle Pz, if it is judged that the actual detected stall current AD value Xz′ is greater than or equal to the theoretical stall current Xz, the cooking device is controlled to issue a fault alarm reminder. In the whole process of progressively pushing the panel, only when the Pz duty cycle is used to push, and it is judged that the actual detected stall current AD value is greater than or equal to the theoretical stall current, the system will judge it as a fault. When pushing with other duty cycles less than the Pz duty cycle, if it is judged that the actual detected stall current AD value is greater than or equal to the theoretical stall current, it will not report a fault, and will continue to push with a duty cycle of the next level that is slightly larger, avoiding the trouble caused by frequent fault reports to the user. At the same time, it can also effectively avoid the problem of low success rate of panel opening caused by the driving mechanism in the prior art only pushing the panel once with the maximum duty cycle, only judging once, and not trying to push the panel again if it is judged to be abnormal. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 A schematic diagram of the structure of the panel opening and closing device in the embodiment is shown;

[0024] Figure 2 A cross-sectional view of the panel opening and closing device in the embodiment when the panel is in a closed position is shown;

[0025] Figure 3 It shows an enlarged cross-sectional view of the panel opening and closing device in the embodiment when the panel is in the open position;

[0026] Figure 4 A schematic diagram showing the judgment logic of an implementation method of the panel opening control method in the embodiment is shown;

[0027] Figure 5 A schematic diagram showing the judgment logic of another implementation of the panel opening control method in the embodiment;

[0028] Description of reference numerals:

[0029] 1. Panel;

[0030] 2. driving mechanism; 21. driving assembly; 211. driving source; 212. sliding block; 22. push rod assembly;

[0031] 3. Mounting plate; 4. Front frame. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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. That is to say, the order of the steps in the following embodiments is only an example for clear explanation, and is not a limitation on the implementation method. For example, without conflicting with the above-mentioned embodiments of the present application, the order of each step can be slightly adjusted or other steps can be added between two adjacent steps. Such adjustments also fall within the scope of protection of the embodiments of the present application and are not given one by one here.

[0036] Embodiment 1

[0037] like Figures 1 to 5 As shown, this embodiment provides a panel opening control method for a cooking device, wherein the cooking device is provided with a driving mechanism 2 for driving a panel 1 to open automatically.

[0038] like Figure 4 As shown, the panel opening control method of the cooking device provided in this embodiment includes the following steps:

[0039] Step S101: receiving a panel start signal;

[0040] In the above step S101, the user can send a panel opening signal to the cooking device by voice or touch. For example, a voice receiving module for receiving user instructions can be provided on the cooking device, and the voice receiving module can send the received panel opening instruction to the control unit of the cooking device, and the control unit controls the driving mechanism 2 to move the panel 1 to open according to the signal. Alternatively, a touch button or touch area for triggering the opening of the panel 1 is provided on the panel 1. When the user triggers the touch button or touch area, the panel 1 will feed back the trigger signal to the control unit of the cooking device, and the control unit controls the driving mechanism 2 to move the panel 1 to open.

[0041] Further, after receiving the panel start signal, the following steps are performed:

[0042] Controlling the driving mechanism 2 to gradually push the panel 1 to open with a duty cycle that increases step by step, wherein the controlling the driving mechanism 2 to gradually push the panel 1 to open with a duty cycle that increases step by step specifically includes:

[0043] Step S102: Control the driving mechanism 2 to push the panel 1 with a set duty cycle, and determine whether the actual stall current of the driving mechanism 2 is less than the set stall current threshold. If so, execute step S103a; if not, execute step S103b.

[0044] In the above step S102, the driving mechanism 2 can drive the panel 1 to move between a preset open position and a closed position. It should be noted that the preset open position is less than the limit open position of the panel 1, and the panel 1 can be taken out of the water tank behind the panel 1 when it is in the open position. The driving source 211 of the driving mechanism 2 is a driving motor, for example, a push rod motor or a lead screw motor. The maximum duty cycle of the driving source 211 of the driving mechanism 2 is a set value, generally 100%. The set duty cycle described in this embodiment is less than the maximum duty cycle of the driving mechanism 2, and preferably, the set duty cycle does not exceed 50%. When the control unit receives the panel opening signal, it will control the driving source 211 of the driving mechanism 2 to drive the panel 1 to open with a set duty cycle lower than the maximum duty cycle, so as to avoid the problem that the panel 1 is easily stuck due to direct driving with the maximum duty cycle. The stall current threshold is the current threshold when the driving mechanism 2 is operating normally, and the stall current threshold corresponding to the different duty cycles output by the driving mechanism 2 is different.

[0045] Furthermore, in the above step S102, the actual stall current value of the driving mechanism 2 within the set T1 time when the panel 1 is pushed is obtained, and at the same time, it is determined whether the actual stall current is less than the set stall current threshold. The set T1 time is relatively short, and T1 is generally between 5s and 20s.

[0046] Step S103a: controlling the driving mechanism to continue pushing the panel at the current duty cycle until it is determined that the panel has been fully opened, and then controlling the driving mechanism to stop driving;

[0047] In the above step S103a, if it is determined that the actual stall current is less than the stall current threshold, it indicates that the drive mechanism 2 is in a normal operating state without any abnormality, and the panel 1 can be pushed normally, then the drive mechanism 2 is controlled to continue pushing the panel 1 at the current duty cycle until the panel 1 is fully opened, and the drive mechanism 2 is controlled to stop supplying power. In this embodiment, the panel 1 is fully opened means that the panel 1 is opened to a preset open position, and the open position is a preset position between the extreme open position of the panel 1 and the critical open position for taking out the water tank.

[0048] Step S103b: Control the driving mechanism to restart and push the panel with a duty cycle of the next level greater than the current duty cycle.

[0049] In the above step S103b, if it is determined that the actual stall current is greater than or equal to the stall current threshold, the surface drive mechanism 2 or the panel 1 may produce adhesion and the like, the friction resistance is large, and the current duty cycle is too small to push the panel 1. Therefore, the drive mechanism 2 is controlled to stop power supply and push the panel 1 again with a duty cycle of a higher level, thereby greatly improving the probability of success in the process of opening the panel 1, making it convenient for users to take the water tank and improving the user experience.

[0050] The panel opening control method provided by the above-mentioned embodiment is that during the opening process of the panel 1, the driving mechanism 2 gradually pushes the panel 1 to open with a duty cycle that increases step by step. The initial driving force of the driving mechanism 2 is relatively small, as long as it can push the panel 1, and it gradually increases, so that the panel 1 is not easy to get stuck when it is opened, which greatly improves the probability of successful opening of the panel 1, facilitates the user to take the water tank, and improves the user experience. In addition, the present application first determines whether the current actual stall current is less than the set stall current threshold value when the driving mechanism 2 starts to push the panel 1 with a duty cycle of different levels each time. When it is determined that the actual stall current is greater than the stall current threshold value, it will not alarm, but push the panel again with the duty cycle of the next level, and the possibility of misjudging that the panel 1 has been opened in place is relatively small, which effectively solves the problem in the prior art that the driving mechanism 2 pushes the panel with the maximum duty cycle, and the panel 1 is easy to get stuck due to the large driving force, resulting in a low success rate and a high misjudgment rate of the panel 1.

[0051] Furthermore, the step S103a specifically includes the following steps:

[0052] Step S1031: while the driving mechanism 2 continues to push the panel 1 to open at the current duty cycle, detecting the actual stall current of the driving mechanism 2 in real time;

[0053] It should be noted that the time node for obtaining the actual locked-rotor current in step S1031 is greater than the time for obtaining the actual locked-rotor current in step S102, that is, greater than T1.

[0054] Step S1032: determine whether the actual stall current reaches the stall current threshold: if so, execute step S1032a; if not, execute step S1032b;

[0055] Step S1032a: judging that the panel 1 has been fully opened, the driving is stopped; Step S1032b: judging that the panel 1 has not been fully opened, the panel 1 is continued to be pushed;

[0056] In the above step S1031: when it is determined that the driving mechanism 2 is in normal operation and no abnormality occurs, and the panel 1 can be pushed normally, the driving mechanism 2 is controlled to continue pushing the panel 1 with the current duty cycle, and during the process of continuing to push, the step of determining whether the actual stall current reaches the stall current threshold is executed again to determine whether the panel 1 is fully opened.

[0057] Optionally, combined Figure 5 As shown, the panel opening control method provided in this embodiment specifically performs the following steps after receiving the panel opening signal:

[0058] Step S201: Control the first duty cycle P1 set by the driving mechanism 2 to push the panel 1 to open, and at the same time obtain the actual stall current X1′ of the driving mechanism 2;

[0059] In the above step S201, preferably, P1<50%. More preferably, 50%>P1>30%. The driving source 211 of the driving mechanism 2 is controlled to push the panel 1 at a P1 duty cycle far lower than the maximum duty cycle, so as to avoid the driving mechanism 2 directly pushing the panel 1 with high power, which may cause mechanical stagnation and jamming of the panel 1 during the opening process.

[0060] Step S202: Determine whether the actual stall current X1′ is less than the set first stall current threshold X1. If so, execute step S203a; if not, execute step S203b.

[0061] In the above step S201, the first stall current threshold X1 is a test value obtained through experiments. The size of the first stall current threshold X1 corresponds to the size of the first duty cycle P1. When it is judged that the actual stall current is less than the stall current threshold, it means that the drive mechanism 2 is normal. If it is judged that the actual stall current is greater than or equal to the stall current threshold, it indicates that the drive mechanism 2 is abnormal.

[0062] Step S203a: Control the driving mechanism 2 to continue to push the panel 1 at the first duty cycle P1 until it is determined that the actual stall current X1′ of the driving mechanism 2 reaches the first stall current threshold X1, then it can be inferred that the panel 1 has been fully opened, and the driving mechanism 2 is controlled to stop driving;

[0063] In the above step S203a, when it is determined that the actual stall current X1′ is less than the first stall current threshold X1, it indicates that the drive mechanism 2 is in normal operation and no abnormal phenomenon such as stall occurs. At this time, the drive mechanism 2 can be controlled to continue pushing the panel 1 with the duty cycle, and in this process, it is determined whether the panel 1 has been opened to the preset open position by whether the stall current reaches the set threshold. If so, the drive source 211 of the drive mechanism 2 is controlled to stop supplying power and stop pushing the panel 1.

[0064] Step S203b: Control the driving mechanism 2 to restart and push the panel 1 with a second duty cycle P2 that is greater than the first duty cycle P1.

[0065] In the above step S203b, P1<P2<100%. When it is determined that the actual stall current is greater than or equal to the first stall current threshold value within the set T1 time when the drive mechanism 2 starts to push the panel 1, it indicates that the drive mechanism 2 is in an abnormal operating state, and it is difficult to push the panel 1 with the P1 duty cycle. Therefore, at this time, the drive source 211 of the drive mechanism 2 is controlled to stop supplying power, and the drive mechanism 2 is controlled to no longer push with the P1 duty cycle, but to restart and push the panel 1 with a P2 duty cycle greater than P1, thereby improving the success rate of opening the panel 1.

[0066] Furthermore, when the driving mechanism 2 starts to push the panel 1 at the second duty cycle P2, the following steps are also performed:

[0067] Obtain the current actual stall current X2′ of the drive mechanism 2, and compare the actual stall current X2′ with the second stall current threshold X2 corresponding to the P2 duty cycle: if it is judged that X2′<X2, the drive mechanism 2 continues to push the panel 1 with the second duty cycle P2, until it is judged that the actual stall current X2′ of the drive mechanism 2 reaches the second stall current threshold X2, indicating that the panel 1 has been fully opened, and the drive mechanism 2 is controlled to stop driving; if it is judged that X2′≥X2, the drive mechanism 2 is controlled to stop driving, and the panel 1 is pushed again with the Px duty cycle, where 100%≥Px>P2.

[0068] In the above scheme, Px is greater than P2 and less than or equal to 100% duty cycle, that is, the maximum duty cycle. Preferably, in this embodiment, Px is less than 100% duty cycle, and in the process of pushing the panel 1 with this duty cycle, a judgment step of judging whether the actual stall current is less than the stall current threshold is also performed to judge whether the panel 1 is fully opened by stalling.

[0069] Optionally, in this embodiment, the actual stall current is the stall current AD value actually detected when the driving source 211 pushes the panel 1 at the duty cycle, and the stall current threshold is the theoretical stall current AD value experimentally measured when the driving source 211 pushes the panel 1 at the duty cycle. If the stall current AD value actually detected is less than the stall current threshold, it indicates that the driving source 211 is in a normal working state, and if it is equal to or greater than the stall current threshold, it indicates that there is an abnormality and there is a risk of stalling.

[0070] Optionally, it is set that: Pn is the output duty cycle of the driving source 211 of the driving mechanism 2, Xn is the corresponding stall current threshold when the driving source 211 outputs the Pn duty cycle, and Xn′ is the stall current AD value actually detected when the driving source 211 outputs the Pn duty cycle; Pz is the output 100% duty cycle of the driving source 211 of the driving mechanism 2, Xz is the corresponding stall current threshold when the driving source 211 outputs the 100% duty cycle, and Xz′ is the stall current AD value actually detected when the driving source 211 outputs the Pz duty cycle; P1<……<Pn<Pz, corresponding X1<……<Xn <Xz, where n≥2; after receiving the panel start signal, the driving source 211 of the driving mechanism 2 is controlled to push the panel 1 with a duty cycle that increases step by step from P1, …, Pn to Pz.

[0071] Furthermore, in the process of the driving source 211 pushing with duty cycles of different levels such as P1, ..., Pn, the following steps are respectively performed: determine whether Xn′ corresponding to the current level of duty cycle is less than Xn: if so, the driving mechanism 2 continues to push the panel 1 until it is determined that Xn′=Xn, then it can be inferred that the panel 1 has been opened in place, and the driving mechanism 2 is controlled to stop driving; if not, the driving mechanism 2 is controlled to stop pushing the panel 1 with the current level of duty cycle, and push the panel 1 again with the next level of duty cycle.

[0072] The panel opening control method provided in the present embodiment controls the driving source 211 of the driving mechanism 2 to push the panel 1 with a duty cycle that increases step by step from P1, ..., Pn to Pz after receiving the panel opening signal, and in the process of the driving source 211 pushing with the duty cycles of different levels of P1, ..., Pn, respectively executes the judgment steps of judging whether the stall current AD value actually detected at the current level of duty cycle is less than the stall current threshold value, by using progressive pushing of the panel 1 and multiple judgment control logics, when the moving parts of the driving mechanism 2 and the panel 1 expand and contract due to heat and cold to produce adhesion, the adhesion position can be separated little by little, and the matching deviation and misalignment will gradually return to the original position without being directly stuck, which greatly improves the success rate of opening the panel 1, thereby improving the user experience.

[0073] In the above scheme, the driving source 211 increases step by step from P1, ..., Pn to Pz. Generally speaking, the more levels, the better the effect, but it takes longer to open the panel 1. Therefore, preferably, n=4, P1 is 40%, P2 is 55%, P3 is 70%, and P4 is 85%. That is, after receiving the panel opening signal, the driving source 211 of the control driving mechanism 2 is pushed to the panel 1 in a manner of gradually increasing the duty cycle of 40%, 55%, 70%, 85%, and 100%, and in the process of each level of pushing, the judgment step of judging whether the Xn′ corresponding to the duty cycle of the current level is less than Xn is performed respectively.

[0074] Optionally, when the driving source 211 of the driving mechanism 2 pushes the panel 1 with a Pz duty cycle (i.e., a 100% duty cycle), the following steps are performed: determine whether Xz′ is less than Xz: if so, the driving mechanism 2 continues to push the panel 1 until it is determined that Xz′=Xz, then it can be inferred that the panel 1 has been opened in place, and the driving mechanism 2 is controlled to stop driving; if not, the cooking equipment is controlled to issue a fault alarm reminder.

[0075] In the panel opening control method provided in this embodiment, when the driving source 211 of the driving mechanism 2 pushes the panel 1 with the maximum duty cycle Pz, if it is judged that the actual detected stall current AD value Xz′ is greater than or equal to the theoretical stall current Xz, the cooking device is controlled to issue a fault alarm reminder. In the whole process of progressively pushing the panel 1, only when it is pushed with the Pz duty cycle, it is judged that the actual detected stall current AD value is greater than or equal to the theoretical stall current threshold, the system will judge it as a fault. When pushing with other duty cycles less than the Pz duty cycle, if it is judged that the actual detected stall current AD value is greater than or equal to the theoretical stall current, it will not report a fault, and will continue to push with a duty cycle of the next level and a larger duty cycle, avoiding the trouble caused by frequent fault reports to the user. At the same time, it can also effectively avoid the problem of low success rate of opening the panel 1 caused by the driving mechanism 2 in the prior art only pushing the panel 1 once with the maximum duty cycle, only judging once, and not trying to push the panel 1 again if it is judged to be abnormal.

[0076] The embodiment of the present invention optimizes the logic control method of the stall current and the output duty cycle of the driving mechanism 2, thereby increasing the probability of successful panel opening without increasing cost rectification and improving user experience.

[0077] The control flow of the entire opening process of the panel 1 of the cooking device in this embodiment is as follows:

[0078] When the panel 1 receives the start command, the control unit of the cooking device starts to control the driving source 211 to rotate forward, firstly driving it with a duty cycle of P1, and at the same time detecting the current actual stall current X1′ and comparing it with the stall current threshold value X1:

[0079] If X1′< X1, the pushing continues until it is determined that X1′= X1, then the system determines that the panel 1 has been in place, and the driving source 211 stops supplying power.

[0080] If X1′≥X1, the driving source 211 stops supplying power and starts driving again with a duty cycle of P2. At the same time, the current X2′ is detected and compared with X2:

[0081] If X2′< X2, the pushing continues until it is determined that X2′= X2, then the system determines that the panel 1 has been in place, and the driving source 211 stops supplying power.

[0082] If X2′≥ X2, the driving source 211 stops supplying power, and pushes again with the duty cycle of P3, ..., Pn, until Pz. If during this process, Xn′< Xn, the pushing continues until it is judged that Xn′= Xn, then the system judges that the panel 1 has been in place, and the driving source 211 stops supplying power. Only when pushing until the duty cycle of Pz is judged that Xz′≥Xz, the system will judge that it is a fault.

[0083] When the entire panel opening and closing control device is started, the initial static friction resistance to be overcome is the largest. When the temperature is low, objects are easily sticky due to thermal expansion and contraction, or wear and tear after long-term use, which easily leads to matching deviation and misalignment. Driving with the maximum duty cycle is very easy to cause mechanical jamming, and it is not easy to push the panel 1. The system only judges once, resulting in a low success rate. This embodiment uses progressive pushing and multiple judgment control logic to disconnect the system from adhesion and return to matching misalignment, reducing the wear and tear of the system during long-term use, greatly improving the success rate of opening the panel 1, and thus improving the user experience.

[0084] Embodiment 2

[0085] like Figures 1 to 3 As shown, this embodiment provides a panel opening and closing control device, which is controlled by the panel opening control method of the cooking device of the above-mentioned embodiment 1. The panel opening and closing control device includes a receiving unit, an acquisition unit, and a control unit. The receiving unit is used to receive a panel opening signal, and the receiving unit can be a touch button or a touch screen or a voice receiving module, etc.; the acquisition unit is used to obtain the actual stall current of the driving source 211 of the driving mechanism 2; the comparison unit is used to compare the actual stall current with the set stall current threshold, and feed back the comparison result to the control unit; the control unit is used to control whether the driving mechanism 2 stops driving and / or whether to re-push the panel 1 with the next level of duty cycle according to the comparison result of the comparison unit.

[0086] Specifically, if during the TI time when the driving mechanism 2 starts to drive the panel 1 to open, the comparison result of the comparison unit is that the actual stall current is less than the stall current threshold, the control unit controls the driving mechanism 2 to push the panel 1 normally with the current duty cycle; if the comparison result of the comparison unit is that the actual stall current is greater than or equal to the stall current threshold, the control unit controls the driving mechanism 2 to restart and re-push the panel 1 with a duty cycle greater than the current duty cycle.

[0087] In the above scheme, when the driving mechanism 2 pushes the panel 1 normally with the current duty cycle, if it is determined that the actual stall current reaches the stall current threshold, it indicates that the panel 1 has been fully opened, and the driving mechanism 2 is controlled to stop driving.

[0088] Among them, the locked-rotor current threshold is the current threshold when the driving mechanism 2 operates normally, and the locked-rotor current threshold corresponding to different duty cycles output by the driving mechanism is different.

[0089] Further, the panel opening and closing control device further includes a driving mechanism 2, and the driving mechanism 2 is adapted to drive the panel 1 to move between a preset opening position and a closing position; the preset opening position is a preset position between the critical position of the water tank that can be taken out from the top of the cooking chamber and the extreme opening position of the panel 1.

[0090] Optionally, the driving mechanism 2 includes a driving component 21 and a push rod component 22, and the push rod component 22 is arranged between the driving component 21 and the panel 1 and is adapted to drive the panel 1 to move under the drive of the driving component 21.

[0091] Optionally, the driving mechanism 2 is installed on the mounting plate 3 above the cooking chamber of the cooking device, and a front frame 4 is fixedly arranged on one side of the mounting plate 3 close to the opening of the cooking device; the driving component 21 includes a driving motor fixedly arranged on the mounting plate 3, and the driving motor is adapted to drive the panel 1 to open and close relative to the front frame 4 through the push rod component 22. The front frame 4 is located at the front opening of the cooking device and is adapted to limit the position of the panel 1. When the panel 1 is closely attached to the front frame 4, the panel 1 is in the closed position, and when the panel 1 moves outward away from the front frame 4 under the drive of the driving mechanism 2, the panel 1 is in the open state.

[0092] In this embodiment, the push rod component 22 includes a "C"-shaped push rod body, and the "C"-shaped push rod body is composed of two first side frames arranged oppositely and second side frames connected to both ends of the two first side frames. Both ends of the "C"-shaped push rod body are fixedly connected to the inner side surface of the panel 1, and the middle part of the second side frame is connected to the driving component 21.

[0093] Optionally, a water tank is also detachably arranged on the mounting plate 3, and the water tank is located above the mounting plate 3 and behind the panel 1. When the panel 1 is in the preset opening position, the distance between it and the front frame 4 is H, when the panel 1 is pushed out to the preset critical position where the water tank can be taken out, the distance between it and the front frame 4 is Hmin, and the extreme opening position of the panel 1 is Hmax, where Hmin < H < Hmax. The above design can effectively ensure that the water tank can be taken out when the panel 1 is in the preset opening position.

[0094] The panel opening and closing control device provided in this embodiment includes a front frame 4, a panel 1, a driving assembly 21, a push rod assembly 22 and a mounting plate 3. The front frame 4 and the mounting plate 3 are fixed to each other, the driving assembly 21 includes a driving source 211 and a slider 212 that can move under the drive of the driving source 211, the driving source 211 is fixed on the mounting plate 3, the slider 212 is used to connect, fix and drive the push rod assembly 22, one end of the push rod assembly 22 is connected to the slider 212 and the other end is fixed to the panel 1. When the entire system is running, after the panel 1 receives the command, the driving source 211 starts to rotate forward, and the driving slider 212 pushes the push rod assembly 22, thereby pushing the panel 1. When the panel 1 is in the preset open position, the control unit will detect that the actual stall current is equal to the stall current threshold, and then control the driving mechanism 2 to stop driving.

[0095] Embodiment 3

[0096] This embodiment provides a cooking device, including the panel opening and closing control device of the cooking device of the above-mentioned embodiment 2.

[0097] Optionally, in this embodiment, the cooking device is a steam oven or a steam-oven-in-one machine.

[0098] 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 panel opening control method for a cooking device, characterized in that: The opening control method comprises: Receive panel start signal; Controlling the driving mechanism to gradually push the panel to open with a duty cycle that increases step by step; The controlling driving mechanism to gradually push the panel to open with a gradually increasing duty cycle specifically includes: Control the drive mechanism to push the panel with the set duty cycle, obtain the actual stall current of the drive mechanism between 5s and 20s after the panel starts to be pushed, and determine whether the current actual stall current of the drive mechanism is less than the set stall current threshold: If yes, the driving mechanism is controlled to continue to push the panel at the current duty cycle until it is determined that the panel has been fully opened, and then the driving mechanism is controlled to stop driving. The time node for determining whether the panel is fully opened is greater than 20 seconds. If not, the driving mechanism is controlled to restart and push the panel with a duty cycle of the next level greater than the current duty cycle; The stall current threshold is a current threshold when the driving mechanism is operating normally, and different duty cycles of the driving mechanism correspond to different stall current thresholds.

2. The panel opening control method according to claim 1, characterized in that: The controlling the driving mechanism to continue to push the panel at the current duty cycle until it is determined that the panel has been fully opened, and the controlling the driving mechanism to stop driving specifically includes: When the driving mechanism continues to push the panel to open at the current duty cycle, the actual stall current of the driving mechanism is detected in real time; And determine whether the actual stall current reaches the stall current threshold: If yes, it can be inferred that the panel has been fully opened and the driving is stopped; if no, it can be inferred that the panel has not been fully opened and the panel continues to be pushed.

3. The panel opening control method according to claim 1, characterized in that: After receiving the panel start signal, the following steps are performed: Control the driving mechanism to start pushing the panel to open with a set first duty cycle P1, and at the same time obtain the current actual stall current X1′ of the driving mechanism; Determine whether the actual stall current X1′ is less than the set first stall current threshold X1: If yes, the driving mechanism is controlled to continue to push the panel at the first duty cycle P1 until it is determined that the actual stall current X1′ of the driving mechanism reaches the first stall current threshold X1, then it can be inferred that the panel has been fully opened, and the driving mechanism is controlled to stop driving; If not, the driving mechanism is controlled to restart and push the panel with a second duty cycle P2 that is greater than the first duty cycle P1.

4. The panel opening control method according to claim 3, characterized in that: The first duty cycle P1<50%, P1<P2<100%.

5. The panel opening control method according to claim 3, characterized in that: When the driving mechanism starts to push the panel at the second duty cycle P2, the following steps are also performed: The actual stall current X2′ of the driving mechanism is obtained, and the actual stall current X2′ is compared with the second stall current threshold X2: If it is determined that X2′<X2, the driving mechanism continues to push the panel at the second duty cycle P2 until it is determined that the actual stall current X2′ of the driving mechanism reaches the second stall current threshold X2, and the driving mechanism is controlled to stop driving; If it is determined that X2′≥X2, the driving mechanism is controlled to stop driving and the panel is pushed again with a duty cycle of Px, where 100%≥Px>P2.

6. The panel opening control method according to any one of claims 1 to 5, characterized in that: set up: Pn is the output duty cycle of the driving source of the driving mechanism, Xn is the corresponding stall current threshold when the driving mechanism outputs the Pn duty cycle, and Xn′ is the stall current AD value actually detected when the driving source outputs the Pn duty cycle; Pz is the 100% duty cycle of the driving source output of the driving mechanism, Xz is the corresponding stall current threshold when the driving source outputs 100% duty cycle, and Xz′ is the stall current AD value actually detected when the driving source outputs Pz duty cycle; P1<……<Pn<Pz, corresponding to X1<……<Xn <Xz, where n≥2; After receiving the panel opening signal, the driving source of the driving mechanism is controlled to push the panel with a duty cycle increasing step by step from P1, ..., Pn to Pz; When the driving source is driven with different duty ratios of P1, ..., Pn, the following steps are performed respectively: Determine whether Xn′ corresponding to the current level of duty cycle is less than Xn: If yes, the driving mechanism continues to push the panel until it is determined that Xn′=Xn, then it can be inferred that the panel has been fully opened, and the driving mechanism is controlled to stop driving; If not, the driving mechanism is controlled to stop pushing the panel at the current level of duty cycle, and to push the panel again at the next level of duty cycle.

7. The panel opening control method according to claim 6, characterized in that: When the driving source of the driving mechanism starts to push the panel with a Pz duty cycle, the following steps are performed: Determine whether Xz′ is less than Xz: If yes, the driving mechanism continues to push the panel until it is determined that Xz′= Xz, then it can be inferred that the panel has been fully opened, and the driving mechanism is controlled to stop driving; If not, the cooking device is controlled to issue a fault alarm reminder.

8. The panel opening control method according to claim 6, characterized in that: The n=4, P1 is 40%, P2 is 55%, P3 is 70%, and P4 is 85%.

9. A panel opening and closing control device, which is controlled by the panel opening control method of any one of claims 1 to 8, characterized in that: The panel opening and closing control device comprises: A receiving unit, used for receiving a panel opening signal; An acquisition unit, used for acquiring an actual locked-rotor current of a driving mechanism; A comparison unit, used for comparing the actual locked-rotor current with a set locked-rotor current threshold; a control unit, used for controlling the driving mechanism to stop driving and / or to re-drive the panel at a next level of duty cycle according to the comparison result of the comparison unit; The stall current threshold is a current threshold when the driving mechanism operates normally, and different duty cycles output by the driving mechanism correspond to different stall current thresholds.

10. A cooking device, characterized in that: A panel opening and closing control device for cooking equipment comprising the above-mentioned claim 9.

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