RU2797253C2 - Security system, operating mode selection method and kitchen device lid - Google Patents

Abstract

FIELD: kitchen appliances.

SUBSTANCE: security system (4) for a kitchen device (1) containing a container (5) and a lid (21) containing: a processor (10); a holding bracket (7) configured to hold the lid (21) on the container (5) in a holding position; a first sensor (40) configured to send a hold signal to the processor (10) when the holding bracket (7) is in the hold position; and a second sensor (43) configured to transmit to the processor (10) a function signal indicating the function of the lid (21), wherein the processor (10) is configured to select the operating mode of the kitchen appliance (1) depending on the hold signal and the signal functions.

EFFECT: safe operation.

15 cl, 22 dwg

Description

FIELD OF TECHNOLOGY

[0001] This invention relates to a safety system for a kitchen device, a method for selecting an operating mode of a kitchen device, and a lid for a kitchen device.

BACKGROUND OF THE INVENTION

[0002] Kitchen devices that perform a variety of functions of mixing, processing, grinding and/or heating ingredients have recently become popular in consumer and commercial markets. These devices can be called multicookers. A problem that has arisen due to the increasing popularity of such multicookers is that stirring and/or grinding the heated substances in such a way that they have large amounts of kinetic energy can pose a significant hazard to users operating the device. Therefore, to reduce the risk of users being exposed to and/or injured by heated ingredients, safety systems have been incorporated into devices performing kinetic operations such as mixing or grinding heated ingredients.

[0003] However, currently known safety systems are primarily designed to keep the container used by the kitchen appliance closed by securing the lid to the container and ensuring that the lid remains attached to the container while the ingredients have significant kinetic energy. A significant disadvantage of this design is that the common task in cooking, boiling down a combination of ingredients containing water by heating said combination so that the water evaporates and leaves, is either impossible or limited due to the limitation of the escape routes available to pair.

[0004] In addition, it is currently not possible for the kitchen appliance to select an operating mode and apply safety restrictions to the motor and the kitchen appliance providing mixing, processing, and/or chopping functions depending on the intended and possible use of the kitchen appliance.

[0005] Finally, modern cooking devices having chopping and heating functions are not capable of boiling down ingredients by evaporation, because safety standards require that access to the moving blades of the kitchen device be limited.

SUMMARY OF THE INVENTION

[0006] The object of the present invention is to at least substantially eliminate the disadvantages discussed above, or at least to provide a useful alternative to the constructions discussed above.

[0007] In a first aspect, the present invention provides a security system for a kitchen appliance comprising a container and a lid, said system comprising:

CPU;

a holding bracket configured to hold the lid on the container in a holding position;

a first sensor configured to send a hold signal to the processor when the hold arm is in the hold position; And

a second sensor configured to send to the processor a function signal indicative of the function of the lid,

wherein the processor is configured to select the operating mode of the cooking device depending on the hold signal and the function signal.

[0008] Preferably, the mode of operation includes limiting the speed of the kitchen appliance motor.

[0009] Preferably, the engine speed limit is implemented by a safety relay that turns off the power supply circuit to the engine when the engine speed sensor measures the maximum speed.

[00010] Preferably, the holding bracket is movable between a free position and a hold position.

[0010] Preferably, the security system further comprises:

a locking hook movable between a free position and a locking position, wherein in the locking position, the locking hook locks the holding bracket in a fixed holding position, and the third sensor is configured to transmit a locking signal when the locking hook is in the locking position.

[0011] Preferably, there are at least two second sensors, and the retaining bracket is configured to contact the lid in at least two separate contact zones, each contact zone containing at least one second sensor.

[0012] Preferably, the function includes an indication of the type of cap present on the container, and the type of cap is determined by the processor by determining which of the second sensors is signaling the function, if any.

[0013] In a second aspect, the present invention provides a lid for use with a security system according to the first aspect of the invention, said lid having a surface geometry configured to cause a second sensor to transmit a function signal to a processor.

[0014] Preferably, the surface geometry includes one or more protrusions configured to interact with the second sensor.

[0015] In a third aspect, the present invention provides a method for selecting an operating mode of a kitchen appliance, comprising the steps of:

placing the lid on the container of the device;

operation of the retaining arm of the device, wherein the retaining arm is configured to hold the lid in position on the container;

determining the position of the holding bracket using the first sensor; determining the function of the cover using the second sensor;

transferring the position of the retaining bracket and the function of the cover to the processor;

And

the processor's choice of operating mode based on the position of the retaining bracket and the function of the cover.

[0016] Preferably, the holding arm is movable between a free position and a hold position, wherein the method further comprises the steps of:

determining when the holding bracket is in the unlocked position, whether the sensor detects the presence of a lid on the container, and then

preventing the processor from using the kitchen appliance; and issuing an error signal if the processor is instructed that the second sensor detects the presence of a lid on the container.

[0017] Preferably, the error signal is a recommendation to clean the second sensor.

[0018] Preferably, the method further comprises the following steps:

device power switch operation;

determining whether the holding bracket is in a holding position; And

instructing the processor to move the retaining bracket to the free position if the retaining bracket is in the retained position.

[0019] Preferably, the method further comprises the following steps:

operating the locking hook from the free position to the locking position to lock the holding bracket in the fixed holding position;

transfer by the third position sensor of the fixing hook to the processor; And

the processor supplying power to the motor if the processor receives an indication from the third sensor that the locking hook is in the locked position.

[0020] Preferably, the method further comprises the step of:

prevents the processor from using the kitchen appliance and generates an error signal if the processor has not received an indication that the locking hook is in the locking position within 4 seconds of the locking hook being active.

[0021] Preferably, the mode of operation includes limiting the speed of the motor of the kitchen appliance.

[0022] Preferably, the method further comprises the step of:

motor speed measurement with motor speed sensor; And

limiting the motor speed by cutting off the power supply circuit with a safety relay if the motor speed exceeds a predetermined maximum motor speed.

[0023] Preferably, there are at least two second sensors, and the holding bracket is configured to contact the lid in at least two separate contact zones, each contact zone containing at least one second sensor.

[0024] Preferably, the function includes an indication of the type of cap present on the container, and the type of cap is determined by the processor by determining which of the second sensors is signaling the function, if any.

[0025] In a fourth aspect, the present invention provides a lid for a container used with a cooking appliance, the container comprising a bottom and upwardly extending sidewalls ending in a rim surrounding an opening into a space within the container, the lid comprising:

central bushing;

rim; And

a structure located between the central sleeve and the rim, containing one or more first openings in such a way that the free space of the structure is at least 20% of the hole, and the continuous rectangular part of the specified free space does not exceed 78 mm × 25.4 mm.

[0026] Preferably, said construct further comprises:

an intermediate element separating one or more second openings from said one or more first openings;

one or more external connecting elements connecting the intermediate element to the rim, supporting the intermediate element, thus forming said one or more first openings; And

one or more internal connecting elements connecting the intermediate element with the central sleeve, supporting the central sleeve, thus forming said one or more second openings.

[0027] Preferably, said one or more external connectors are equidistant from each other such that the free space is adjacent to the rim for at least 100° continuous to allow scraper access through the cover to the upwardly extending side walls.

[0028] Preferably, said one or more external connecting elements are located in one place in such a way that the free space is located adjacent to the rim continuously at least 350°.

[0029] Preferably, the central sleeve occupies a first distance in the radial direction from the center point of the cover;

the intermediate element is located at a second distance in the radial direction from the center point; And

the rim is located at a third distance in the radial direction from the center point,

wherein the difference between said first distance and said second distance is approximately 65 mm, and

wherein the difference between said second distance and said third distance is approximately 50 mm.

[0030] Preferably, the free space of this design is at least 80% of the hole.

[0031] In a fifth aspect, the present invention provides a lid for a container for use with a cooking appliance, the container comprising a bottom and upwardly extending sidewalls ending in a rim surrounding an opening into a space within the container, the lid comprising:

central bushing;

rim; And

a structure located between the central sleeve and the rim, containing one or more first openings in such a way that the free space of the structure is located adjacent to the rim continuously at least 100 ° to allow access of the scraper through the cover to the side walls extending upwards.

BRIEF DESCRIPTION OF GRAPHICS

[0032] Preferred embodiments of the present invention will now be described by way of example only with reference to the attached drawings.

[0033] FIG. 1 is a partial sectional perspective view of a kitchen appliance using an embodiment of a security system according to the present invention.

[0034] FIG. 2 is a partially sectioned perspective view of the kitchen appliance of FIG. 1 with the holding bracket in the holding position.

[0035] FIG. 3 is a front sectional view of the holding bracket of the kitchen appliance of FIG. 1.

[0036] FIG. 4 is a detailed front sectional view of the holding bracket of the kitchen appliance of FIG. 1.

[0037] FIG. 5 is a right side partial sectional view of the kitchen appliance of FIG. 2 with retaining bracket in free position.

[0038] FIG. 6a is a perspective view of a container for use with the kitchen appliance of FIG. 1.

[0039] FIG. 6b is a perspective view of the container of FIG. 6a with the first embodiment of the sealing lid located on it.

[0040] FIG. 6c is a perspective view of the container of FIG. 6a with the lid for the food processor function disposed thereon.

[0041] FIG. 6d is a perspective view of the container of FIG. 6a with a standard cover placed on it.

[0042] FIG. 7 is a schematic plan view of the covers of FIG. 6b-6d.

[0043] FIG. 8 is a block diagram of an embodiment of a security system according to the present invention.

[0044] FIG. 9 is a circuit diagram of the security system of FIG. 8.

[0045] FIG. 10 is a schematic block diagram of the security system of FIG. 8.

[0046] FIG. 11 is a further schematic block diagram of the security system of FIG. 9.

[0047] FIG. 12 is a perspective view of the kitchen appliance of FIG. 1 with the second embodiment of the sealing lid located on it.

[0048] FIG. 13 is a partially sectioned perspective view of the kitchen appliance of FIG. 12.

[0049] FIG. 14 is a detailed plan view of the kitchen appliance of FIG. 12.

[0050] FIG. 15 is a detailed plan view of the kitchen appliance of FIG. 1 with a third embodiment of a sealing lid located on it.

[0051] FIG. 16 is a detailed plan view of the kitchen appliance of FIG. 1 with a fourth embodiment of a sealing lid located on it.

[0052] FIG. 17 is a detailed plan view of the kitchen appliance of FIG. 1 with the fifth embodiment of the sealing lid located on it.

[0053] FIG. 18 is a detailed side view, partly in section, of the kitchen appliance of FIG. 12 in progress.

[0054] FIG. 19 is a detailed side view, partly in section, of the kitchen appliance of FIG. 12 in progress.

DESCRIPTION OF VARIANTS FOR IMPLEMENTING THE INVENTION

[0055] The kitchen appliance 1, such as the kitchen appliance 1 shown in FIG. 1 may comprise a security system 4 according to the present invention. As shown in FIG. 1, the kitchen appliance 1 typically includes a body 3 and a container 5 having a rim 6 mounted thereon. As shown in FIG. 9, the kitchen appliance 1 also includes a power switch 2. Also provided is a lid 21 which rests on the container 5 during operation. The lid 21 includes a rim 23 extending beyond the rim 6 of the container 5 and a top surface 25. Two protrusions 27 are located on the top surface 25. The protrusions 27 have a rounded front edge 29 and a straight stop edge 31. A contact edge 33 may radiate from the straight stop edge. edges 33 as shown in FIG. 2. Recess 36 provides tactile feedback to the user that the retaining bracket 7 is in the correct alignment position.

[0056] The security system 4 includes a retaining bracket 7 and a locking hook 9. The retaining bracket 7 includes a pair of longitudinally extending elements 37. The elements 37 at the first end 37a are attached to the housing 3 by means of a hinge 39. At the second end 37b, the elements 37 are connected by a perpendicularly rounded element 38. The retaining bracket 7 also includes a channel 41 located at each second end 37b of the elements 37. A cover detection switch 43 is located in each channel 41.

[0057] As shown in FIG. 3, the retaining bracket 7 includes a rotating lip 8 located at each first end 37a of the members 37. The rotating lugs 8 engage with the hinge 39 to allow the retaining bracket 7 to rotate relative to the housing 3 about the hinge axis 45. Also, as shown in FIG. 3 and 4, the channels 41 are essentially vertical slots with a rounded end point.

[0058] The holding bracket 7 rotates between the free position shown in FIG. 1 and the holding position shown in FIG. 2. Channels 41 are configured to receive contact edges 33 when holding bracket 7 is in the holding position, thereby holding cap 21 on container 5. Holding bracket position switch 40 is positioned adjacent holding bracket 7 such that holding bracket 7 leads to operation of the position switch 40 of the holding bracket when the holding bracket 7 is in the holding position.

[0059] The holding bracket 7 is attached to the side of the hinge 39 facing away from the body 3. On the other side of the hinge 39 facing towards the body 3 is an extension bracket 47. The extension bracket 47 extends from the hinge 39 in the opposite direction of the holding bracket. 7. The extension arm 47 is connected to the rotation of the retaining arm 7 and also rotates about the hinge axis 45, albeit out of phase by 180°.

[0060] As shown in FIG. 5, the locking pin 49 extends in the direction from the extension bracket 47 in a perpendicular direction from the body 3. The locking hook 9 includes a cutout 51 at the first end 9a. The locking hook 9 rotates around the second hinge 53 between the free position shown in FIG. 1 and the locking position shown in FIG. 2. As shown in FIG. 5, the second end 9b of the locking hook 9 extends beyond the second hinge 53. The second end 9b is connected to a drive mechanism 55 driven by the locking motor 57. 9 actuates the hook position switch 59 while in the locked position.

[0061] As shown in FIG. 6a-6d, several configurations of the kitchen appliance 1 are possible, specifically, the lid 21 may have a variety of shapes. Fig. 6a shows the container 5 without the lid 21. FIG. 6b shows a container 5 with an embodiment of a sealing lid 21b. Fig. 6c shows a container 5 with a lid 21c for the food processor function. Fig. 6d shows a container 5 with a standard lid 2Id. According to FIG. 7, the sealing cap 21b includes a first edge 33a of the contact edges 33, however, the sealing cap 21b does not include the second edge 33b of the contact edges. The food processor function cover 21c includes the second edge 33b of the contact edges 33, however, the food processor function cover 21c does not include the first edge 33a. Finally, the standard cover 21d includes both the first and the second edge 33a, 33b of the contact edges 33.

[0062] As shown in FIG. 8 and 9, the security system 4 also includes a processor 10 that controls a detent motor controller (not shown) to actuate the detent motor 57. The processor 10 also controls the main motor controller 13 to drive the main motor 15. The speed of the main motor 15 is controlled by means of an engine speed sensor (not shown) which sends a speed signal indicative of the engine speed to the processor 10. The safety system 4 further comprises a safety relay 17 which is responsive to commands from the processor 10 and can interrupt the power supply to the main engine 15.

[0063] The processor 10 is also connected to the holding arm position switch 40, the cover detection switch 43, and the hook position switch 59 to determine whether the switches 40, 43, 59 are operated. Specifically, the cover detection switch 43 is operated when the contact edge 33 comes into contact with a lid detection switch 43 within the channel 41. Actuation of the lid detection switch 43 provides a signal to the processor 10 indicating the presence of the lid 21.

[0064] As shown in FIG. 12, the cooking device 1 may further comprise a lid 321 according to the second embodiment of the sealing lid 21b. Lid 321, similar to lid 21 as seen in FIG. 14 includes a rim 323 surrounding opening 324 and a top surface 325 extending beyond rim 6 of container 5 as shown in FIG. 13. On top surface 325 are two protrusions 327 substantially similar to protrusions 27. The retaining bracket 7, when the retaining bracket 7 is in the holding position, holds the lid 321 on the container 5. As shown in FIG. 13, a paddle 304 driven by the main motor 15 for cooking is disposed in the container 5. In addition, the heating element 308 is mounted on the bottom 311 of the container 5 so that it is in thermal contact with the contents of the container 5. The heating element 308 is controlled by the processor 10.

[0065] As shown in FIG. 14, the lid 321 includes a general structure 329 containing a set of outer openings, which is a set of six outer openings 331 shown in FIG. 14, a set of internal openings 333, which is a set of six internal openings 333 shown in FIG. 14 and a center sleeve 335. The center sleeve 335 extends from the center point 336 of the cover 321 to a radius of 55 mm.

[0066] The set of outer openings 331 includes a group of large outer openings 331a and a group of smaller outer openings 33 lb. The outer openings 331 are separated from the inner openings 333 by an intermediate element 337. The intermediate element 337 is located at a radial distance of 120 mm from the center point 336.

[0067] The spacer 337 is connected to the rim 323 by a set of external connectors, which is the six outer connectors 339 shown in the embodiment of the invention of FIG. 14. These six outer connectors 339 are preferably arranged in pairs, each pair preferably spaced 120° apart and separating the outer openings 331 from each other such that each outer opening 331 extends at least 100° adjacent to the rim 323 or approximately 25% of the perimeter of the rim 323, allowing access for the scraper 347 as shown in FIG. 19, through the lid 321 to the upwardly extending side walls 357 of the container 5. In alternative embodiments, the outer opening 331 may extend as little as 10% of the rim 323. The outer openings 331 converge with the rim 323 at a radial distance of 170 mm from the center point 336. The central sleeve 335 is connected to the intermediate element 337 by means of a set of internal connecting elements representing six preferably equally spaced internal connecting elements 341 shown in FIG. 14. Internal connectors 341 separate internal openings 333 from each other. The central sleeve 335 contains a set of sleeve openings, which is a set of six preferably equally spaced openings 343 of the sleeve.

[0068] The outer openings 331, the inner openings 333, and the sleeve openings 343 together form a free space S ¹ . As shown in FIG. 14, a continuous rectangle 355 may be formed in the free space S ¹ such that the area within the continuous rectangle 355 is completely filled with at least a portion of the free space S ¹ . The structure 329 is sized as explained above such that a continuous rectangle 355 having dimensions equal to or greater than 78 mm × 25.4 mm in the free space plane S ¹ cannot be properly formed according to the process explained above, in free space S ¹ . This, as shown in FIG. 18 prevents the operator's hand 345 from reaching through opening 324.

[0069] Additional embodiments of the lid 321 for the kitchen appliance 1 will now be described, with like elements having similar functions numbered in increments of a hundred.

[0070] FIG. 15 shows a further embodiment of a lid 421 for kitchen appliance 1. In this embodiment, lid 421 comprises a set of two outer connectors 439 grouped at a single point, thus separating a single smaller outer opening 43 lb from a single larger outer opening 431a. Thus, the single larger outer opening 431a extends at least 350° adjacent to the rim 423 or approximately 95% of the perimeter of the rim 423. equidistantly spaced internal connectors 441, thus forming a set of three internal openings 433. Similarly, in this embodiment, the central sleeve 435 comprises a set of three sleeve openings 443. The outer openings 431, the inner openings 433 and the sleeve openings 443 together form a free space S ¹ . Structure 429 is sized such that continuous rectangle 355, similar to FIG. 14 having dimensions equal to or greater than 78 mm×25.4 mm in the plane of the free space S ¹ cannot be properly formed according to the process explained above in the free space S ¹ . [0071] FIG. 16 shows a further embodiment of a lid 521 for kitchen appliance 1. In this embodiment, lid 521 includes a set of two outer connectors 539 separating a single smaller outer opening 531b from a single larger outer opening 531a. These two outer connectors 539 support an intermediate member 537 which is connected to the central sleeve 535 by a single inner connector 541, thus forming a single inner opening 533. Preferably, the inner connector 541 is positioned radially opposite the smaller outer opening 531b. Similarly, in this embodiment, the central sleeve 535 comprises a set of three sleeve openings 543. The outer openings 531, the inner openings 533, and the sleeve openings 543 together form a free space S ¹ . If the central sleeve 535, the intermediate element 537 and the rim 523 have the dimensions indicated above, the free space S ¹ is at least 20% of the opening for the container 5 containing the rim 6 with a diameter of 205 mm. However, more preferably the free space S ¹ is greater than 40%, even more preferably greater than 60%, and as shown in the embodiment of FIG. 16, especially preferably more than 80% of the opening for a container 5 containing a rim 6 with a diameter of 205 mm. Structure 529 is sized such that a continuous rectangle 355, similar to FIG. 14 having dimensions equal to or greater than 78 mm×25.4 mm in the plane of the free space S ¹ cannot be properly formed according to the process explained above in the free space S ¹ .

[0072] FIG. 17 shows a further embodiment of a lid 621 for the kitchen appliance 1. In this embodiment, the lid 621 is for a non-circular container (not shown) and is generally rectangular or more preferably square in shape. Lid 621 includes a set of two outer connectors 639 grouped at a single point, thus separating a single smaller outer opening 631b from a single larger outer opening 631a. A single larger outer opening 631a extends adjacent to the rim 623 for approximately 95% of the perimeter of the rim 623. These two outer connectors 639 support an intermediate member 637 which is connected to the central sleeve 635 by a single inner connector 641, thus forming a single inner opening 633 The center sleeve 635 has a side length of 55 mm and includes a center point 636. The spacer 637 is a rectangular or more preferably square element having a side length of 120 mm. The lid 621 includes a rim 623 that is substantially rectangular or square in shape, with the rim 623 having a side length of 170 mm. Similarly, in this embodiment, the central sleeve 635 includes a set of three openings 643 of the sleeve. The outer openings 631, the inner openings 633 and the sleeve openings 643 together form the free space S ¹ . Structure 629 is sized such that a continuous rectangle 355, similar to FIG. 14 having dimensions equal to or greater than 78 mm×25.4 mm in the plane of the free space S ¹ cannot be properly formed according to the process explained above in the free space S ¹ .

[0073] Those skilled in the art will appreciate that certain elements of the embodiments of the invention of FIG. 14-17 can be combined or modified, for example the design 329 of FIG. 14 can be implemented in a generally rectangular shape similar to the lid 621 of FIG. 17.

[0074] The application of the kitchen appliance 1 will now be discussed.

[0075] As shown in FIG. 10, after activation of the power switch 2, step 101, the processor 10 determines in step 103 whether the holding bracket 7 is in the holding position by determining whether the holding bracket position switch 40 is activated. The processor 10 then determines in steps 105, 107 whether any of the lid detection switches 43 is activated. If so and requested by the user, at step 109, operation of the main motor 15, the processor 10 issues a recommendation at step 111 to move the holding bracket 7 to a free position. If none of the lid detection switches 43 is activated, the processor 10 determines in step 113 that the lid 21 is missing from the container 5 and prevents the main motor 15 from being energized.

[0076] If the holding bracket 7 is not in the hold position because the power switch 2 was activated when the holding bracket 7 is in the free position, or because the processor 10 has issued a recommendation to move the holding bracket 7 to the free position in step 111, the processor 10 determines in steps 115, 117, whether any of the lid detection switches 43 is activated. If any of the cover detection switches 43 is activated, the processor 10 determines in step 119 whether the holding bracket 7 is in the hold position by polling the holding bracket position switch 40 . If the position switch 40 of the holding bracket is not activated, this indicates that the lid detection switches 43 give a false positive result. This may be caused by cuts activating the lid detection switches 43 or by a technical malfunction of the lid detection switches 43 . Thus, the processor 10 at step 121 prevents the power supply to the main motor 15 and issues a recommendation to the user to restart the power switch 2 and/or an error signal indicating a problem with the cover detection switches 43.

[0077] If the retention bracket position switch 40 indicates that the retention bracket 7 is in the hold position, the processor 10 determines at step 123 that the initial security check has been completed and proceeds to the additional security procedures described below.

[0078] The processor 10 now uses the lock motor controller to actuate the lock motor 57 so that the lock hook 9 is lowered and engages the pin 49 in the locked position. This fixes the holding bracket 7 in a fixed holding position as shown in FIG. 2. In the fixed holding position, the holding bracket 7 is prevented from significantly moving out of the holding position due to the engagement of the locking hook 9 with the pin 49. The hook position switch 59 is activated when the locking hook 9 is in the locked position. The processor 10 checks that the locking hook 9 has moved to the locked position by interrogating the hook position switch 59. If the lock hook 9 has not moved to the lock position within four seconds after the processor 10 uses the lock motor controller to drive the lock motor 57, the processor 10 issues an error message and reverses the drive of the lock motor 57, returning the lock hook 9 to the idle position. position.

[0079] As shown in FIG. 11, the processor 10 now selects the operation mode of the kitchen appliance 1. Step 131 is essentially equivalent to step 101, that is, the power switch 2 is activated. Step 133 includes the security procedure of steps 103-123. Processor 10 now selects, in steps 135, 137, 139, 141, the mode of operation of kitchen appliance 1.

[0080] In step 135, processor 10 determines whether both lid detection switches 43 are not activated. If so, this indicates that the lid 21 is not located on the container 5. The processor 10 then deactivates the safety relay 17 at step 137, preventing the main motor 15 from being energized.

[0081] In step 139, the processor 10 determines whether the lid detection switch 43 on the second edge 33b is activated and whether the lid detection switch 43 on the first edge 33a is not activated. If so, this indicates that the sealing lid 21b is located on the container 5. The processor 10 then sets a predetermined safe speed limit in step 141, for example 500 rpm. At step 143, the processor 10 turns on the safety relay 17, energizing the main motor 15. At step 145, the engine speed sensor measures the speed of the main engine 15 and transmits a speed signal to the processor 10. At step 147, the processor 10 determines whether the engine speed is greater than the signal indicated by the signal. speed, a predefined safe speed limit. If so, the processor turns off at step 137 the safety relay 17, preventing power to the main motor 15.

[0082] In step 149, the processor 10 determines whether the lid detection switch 43 on the first edge 33a is activated and whether the lid detection switch 43 on the second edge 33b is not activated. If so, this indicates that the cover 21s for the food processor function is located on the vessel 5. The processor 10 then sets a predetermined safe speed limit in step 151, for example 3000 rpm. Similar to the process described above, next is step 143 of energizing the main motor 15, and at steps 145, 147, the processor 10 controls the speed of the main motor 15. If necessary, that is, if the engine speed is above a predetermined safe speed limit, the processor 10 at 137 disables the safety relay 17, preventing power supply to the main motor 15.

[0083] In step 153, processor 10 determines whether both lid detection switches 43 are activated. If so, this indicates that the standard cap 21d is located on the container 5. The processor 10 then sets a predetermined safe speed limit in step 155, for example 15,000 rpm. Similar to the process described above, next is step 143 of energizing the main motor 15, and at steps 145, 147, the processor 10 controls the speed of the main motor 15. If necessary, that is, if the engine speed is above a predetermined safe speed limit, the processor 10 at 137 opens the safety relay 17, preventing power supply to the main motor 15.

[0084] The caps 321, 421, 521, 621 are used in essentially the same manner as the seal cap 21b. The free space S ¹ allows the evaporation of water and thus allows the food contained in the container 5 to be boiled.

[0085] Advantages of the kitchen appliance 1 will now be discussed.

[0086] The kitchen appliance 1 is capable of distinguishing between lids 21 that are capable of safely holding hot ingredients that are ground or mixed at high speeds and lids 21 that require motor speed limitation to prevent injury or damage from hot ingredients. This capability allows the use of partially or fully open lids 21 allowing for cooking operations such as simmering sauces, frying meat, or the safe use of a food processor (not shown) in vessel 5.

[0087] The use of a separate safety relay 17, rather than performing control of the motor speed when it exceeds a predetermined safe speed limit, provides a reliable and immediate reduction or complete shutdown of the power supply to the main motor 15. Performing this control through the main motor controller 13 can be associated with software or hardware problems of the more complex controller 13 of the main engine.

[0088] The position switches 40, 43, 59 allow the processor 10 to accurately and deterministically check whether the elements of the security system 4, such as the retaining bracket 7, the locking hook 9, and the cover 21, are in their respective positions for safe operation.

[0089] The locking hook 9 ensures in the locked position that the holding bracket 7 remains in a substantially fixed holding position. While some movement of the holding bracket 7 from the fixed holding position may be possible, the locking hook ensures that the holding bracket 7 is not accidentally removed from the lid 21 causing a cooking interruption or safety hazard. This design also provides the user with confidence that the holding bracket 7 is fixed in a fixed holding position and the hot ingredients are safely contained in the container 5.

[0090] The retaining bracket 7 is in contact with the lid 21 in at least two contact zones, which are channels 41. Thus, the retaining bracket 7 securely holds the lid 21 on the container 5 in several degrees of freedom.

[0091] By determining, after power is supplied to the kitchen appliance 1 in steps 103, 105, 107, 109, whether the holding bracket 7 is in the locked and engaged position with the lid 21, and then prompting the user to move the holding bracket 7 to the free position, the processor 10 ensures that the lid detection switches 43 are working correctly before power is applied to the main motor 15. The processor 10 performs this check in steps 115, 117, 119, 121. If the lid detection switches 43 are not working properly, the processor 10 issues a recommendation to clean the switches 43 cover is detected or contact the relevant service provider. This ensures that the lid detection switches 43 operate correctly every time the kitchen appliance 1 is started, increasing the safety of the kitchen appliance 1.

[0092] Likewise, processor 10 determines in steps 103, 105, 107, 113 whether a lid 21 is present on container 5 at all.

[0093] Selecting which combination of the lid detection switches 43 causes the processor 10 to select which operation mode also increases the safety of the kitchen appliance 1. Since the failure to receive a function signal from the lid detection switches 43 causes the safety relay 17 to turn off, the failure of the electronic circuits of the lid detection switches 43 returns the kitchen appliance 1 to its original safe non-working state.

[0094] Lid 321, as well as additional embodiments of lids 421, 521, 621, prevent the user's hand from accessing paddle 308 while cooking appliance 1 is in operation, as shown in FIG. 18. In this way, the safe operation of the cooking device 1 can be ensured, while at the same time providing the largest possible free space S ¹ to facilitate the boiling operation.

[0095] The lid 321, 421, 521, 621 also provides desirable access to the side wall of the container 5 by providing continuity to the outer openings 333, 433, 533, 633 over large portions of the perimeter of the rim 323, 423, 523, 623 such that, for example , the scraper can be easily moved continuously along the side wall of the container 5 without encountering one of the outer connecting elements.

[0096] Although the present invention has been described with reference to specific examples, a person skilled in the art will appreciate that the invention may be embodied in many other forms.

[0097] For example, FIG. 6a-6d show an embodiment of a retaining bracket 207 wherein the retaining bracket 207 includes a rounded member 238 and a second rounded member 237 that is rotatable about a hinge 239.

Claims (39)

1. A security system for a kitchen appliance containing a container and a lid, comprising: CPU; a holding bracket configured to hold the lid on the container in a holding position; And a first sensor configured to send a hold signal to the processor when the hold arm is in the hold position; wherein the holding bracket is configured to contact the lid in at least two separate contact zones, each contact zone containing at least one second sensor configured to transmit to the processor a function signal indicating the type of lid present on the container, wherein the processor is configured to select the operating mode of the kitchen device depending on the hold signal and the function signal, wherein the lid type is determined by the processor by determining which of the second sensors is signaling the function. 2. Security system according to claim. 1, characterized in that the mode of operation includes limiting the speed of the engine of the kitchen device. 3. The safety system according to claim 2, characterized in that the engine speed limiter implements a safety relay that turns off the power supply circuit to the engine when the engine speed sensor measures the maximum speed. 4. Security system according to claim 1, characterized in that the holding bracket is movable between a free position and a holding position. 5. Security system according to claim 1, characterized in that said security system further comprises: a locking hook configured to move between a free position and a locking position, wherein in the locking position, the locking hook locks the holding bracket in a fixed holding position, and the additional sensor is configured to transmit a locking signal when the locking hook is in the locking position. 6. Cover for use with a security system according to any one of paragraphs. 1-5, said lid having a surface geometry configured to cause the second sensor to transmit a function signal to the processor. 7. Cover according to claim 6, characterized in that the surface geometry contains a protrusion configured to interact with the second sensor. 8. A method for selecting the operating mode of a kitchen device, including the following steps: placing the lid on the container of the device; operation of the retaining arm of the device, wherein the retaining arm is configured to hold the lid in position on the container; determining the position of the holding arm with the first sensor and transmitting the position of the holding arm to the processor; transmitting a function signal to the processor using a second sensor, wherein the function signal indicates the type of lid present on the container, and the holding bracket is configured to contact the lid in at least two separate contact zones, and each contact zone contains at least one second sensor; And selection by the processor of the operating mode based on the position of the retaining bracket and the type of cover, wherein the lid type is determined by the processor by determining which of the second sensors is signaling the function. 9. The method of claim. 8, characterized in that the holding bracket is movable between a free position and a holding position, the method further comprising the following steps: when the holding bracket is in the unlocked position, determining if the sensor detects the presence of a lid on the container, and then preventing the processor from using the kitchen appliance; and issuing an error signal if the processor is instructed that the second sensor detects the presence of a lid on the container. 10. Method according to claim 9, characterized in that the error signal is a recommendation to clean the second sensor. 11. The method according to claim 8, characterized in that said method includes the following steps: turn on the power switch of the device; determining whether the holding bracket is in a holding position; And instructing the processor to move the retaining bracket to the free position if the retaining bracket is in the retained position. 12. The method according to claim 8, characterized in that said method includes the following steps: operating the locking hook from the free position to the locking position to lock the holding bracket in the fixed holding position; transfer, by an additional sensor, of the position of the fixing hook to the processor; And the processor's supply of power to the motor if the processor is instructed by an auxiliary sensor that the locking hook is in the locked position. 13. The method according to claim 12, characterized in that said method includes the following step: preventing the processor from using the kitchen appliance and issuing an error signal if the processor has not received an indication that the locking hook is in the locked position within 4 seconds of the locking hook being operated. 14. The method of claim. 8, characterized in that the mode of operation includes limiting the speed of the engine of the kitchen device. 15. The method according to claim 14, characterized in that said method includes the following step: motor speed measurement with motor speed sensor; And limiting the motor speed by cutting off the power supply circuit with a safety relay if the motor speed exceeds a predetermined maximum motor speed.

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