Household appliance for food preparation

Abstract

The present invention relates to a household appliance (110) for food preparation comprising: - an electric motor; - a main output comprising a main output shaft arranged to be driven in rotation by the electric motor; - a movable or removable hatch (201) which can occupy a closed position in which it prevents access to the main output; - detection means for detecting the position of the hatch (201); - a speed selection device (107) comprising a plurality of speed positions; and - a control unit configured to control the rotation speed of the electric motor as a function of the speed position of the speed selection device. According to the invention, for at least one speed position, the control unit is configured to: - control a first rotation speed of the electric motor when the hatch (201) occupies the closed position, and - control a second rotation speed of the electric motor when the hatch (201) does not occupy the closed position.

Description

Technical Field

[0001] This invention relates to a household appliance for food preparation. Background Technology

[0002] Household appliances used for food preparation are known to include the following:

[0003] - Main output end, which includes a main output shaft configured to rotate by a motor.

[0004] - A secondary output end, which includes a secondary output shaft configured to be rotated by a motor.

[0005] Each output can accept one working attachment. Generally, a working attachment placed on one output is different from a working attachment placed on another output. In other words, each working attachment is associated with a given output, but multiple working attachments can be associated with the same output.

[0006] The motor speed is variable and can be set by a selection device that includes multiple speed positions.

[0007] For a given speed and position, known household appliances used for food preparation use a single motor speed regardless of the working attachments, which is not optimal for the use of household appliances.

[0008] Therefore, there is a need for a new type of household appliance for food preparation with improved operation, especially for those using different working attachments. Summary of the Invention

[0009] Therefore, according to the present invention, a household appliance for food preparation is proposed, comprising: a motor; a main output terminal including a main output shaft configured to be driven to rotate by the motor; a movable or detachable hatch that can occupy a closed position, in which the hatch prevents access to the main output terminal; a detection device for detecting the position of the hatch; a speed selection device including a plurality of speed positions; and a control unit configured to control the rotational speed of the motor according to the speed positions of the speed selection device. The control unit is further configured to, for at least one speed position, control a first rotational speed of the motor when the hatch is in the closed position, and control a second rotational speed of the motor when the hatch is not in the closed position. The first rotational speed of the motor differs from the second rotational speed of the motor, and neither the first rotational speed nor the second rotational speed of the motor is zero.

[0010] This household appliance for food preparation allows the motor speed at at least one of the aforementioned speed positions to be adjusted based on the presence or absence of a hatch, thereby adapting the speed to the working attachments used.

[0011] The ability to adjust the motor speed based on the attachments used allows for a better performance / noise ratio. In fact, when household appliances used for food preparation use the same motor speed range, regardless of the attachments used, this single speed range can, for example, prevent the attachments from performing optimally—if the speed range doesn't allow the attachments to reach sufficient speed, or conversely, if the speed used is increased, it results in significant noise.

[0012] The preferred, but non-limiting, aspects of the household appliance for food preparation (used alone or in combination) are as follows:

[0013] - Household appliances used for food preparation also include a secondary output end, which includes a secondary output shaft configured to be driven to rotate by a motor.

[0014] - The at least one speed position corresponds to the maximum speed position of the motor.

[0015] - The first speed of the motor is lower than the second speed of the motor.

[0016] - When the speed position is at its highest, the difference between the motor's first speed and the motor's second speed is the greatest.

[0017] The difference between the first speed and the second speed of the motor is between 300 rpm and 3000 rpm, preferably between 1000 rpm and 2000 rpm.

[0018] - The control unit is configured such that for some of the multiple speed positions, the first speed and the second speed of the motor are different, and for the other speed positions, the first speed and the second speed of the motor are the same.

[0019] - The control unit is configured such that when the motor speed is less than 5000 rpm, the first speed and the second speed of the motor are the same.

[0020] - The control unit is configured to keep the motor speed between 1700 rpm and 15000 rpm.

[0021] - The household appliance for food preparation also includes a base comprising: a pedestal having a receiving area configured to receive a working container; and a head connected to the base and including a main output, a main connector, a secondary output, and a secondary connector, the main connector being configured to allow attachment and detachment of a first working attachment at the main output and to ensure rotation of the first working attachment via a main output shaft; the secondary connector being configured to allow attachment and detachment of a second working attachment at the secondary output and to drive rotation of the second working attachment via a secondary output shaft.

[0022] - The secondary output end is a first secondary output end, the secondary output shaft is a first secondary output shaft, the secondary connector is a first secondary connector, the head also includes a second secondary output end, the second secondary output end includes a second secondary output shaft, the second secondary output shaft is configured to be driven to rotate by a motor, the head also includes a second secondary connector, the second secondary connector is configured to allow the second working attachment to be attached and detached from the second secondary output end, and to ensure that the second working attachment is driven to rotate by the second secondary output shaft, the second secondary output end is located below the head or at the front end of the head.

[0023] - The first auxiliary output shaft is configured to rotate via a reducer driven by a motor, such that the rotational speed of the first auxiliary output shaft is slower than that of the main output shaft, and / or the second auxiliary output shaft is configured to rotate via a reducer driven by a motor, such that the rotational speed of the second auxiliary output shaft is slower than that of the main output shaft.

[0024] The detection device includes a Hall effect sensor and a magnet, with the magnet located on the hatch and the Hall effect sensor located in the head.

[0025] - The detection device includes a switch located in the head, which is actuated by the hatch when the hatch is in the closed position. Attached Figure Description

[0026] Other features and advantages of the invention will be further presented in the following description, which is purely illustrative and not restrictive, and should be read in conjunction with the accompanying drawings, wherein:

[0027] Figure 1 An embodiment of the household appliance for food preparation according to the invention, based on a first configuration, is shown.

[0028] Figure 2 Show Figure 1 The second configuration of the household appliance for food preparation of the present invention is shown.

[0029] Figure 3a and 3b A drive device according to one aspect of the present invention is shown.

[0030] Figure 4 A detection apparatus according to one aspect of the present invention is shown.

[0031] Figure 5a A mixing bowl is shown that can be used with the household appliances for food preparation of the present invention.

[0032] Figure 5b Show Figure 5a The detachable tool holder for the mixer bowl shown.

[0033] Figure 5c Showing with Figure 5bThe detachable tool holder shown is used with the mixer bowl tray to obtain Figure 5a The mixing bowl shown.

[0034] Figure 6 The diagram shows the connection to the main output terminal of the household appliance for food preparation according to the present invention. Figure 5a The mixing bowl shown.

[0035] Figure 7 A miniature crushing bowl is shown that can be used with the household appliances for food preparation of the present invention.

[0036] Figure 8 The diagram shows the connection to the main output terminal of the household appliance for food preparation according to the present invention. Figure 7 The miniature broken bowl shown.

[0037] Figure 9 A bread dough hook is shown connected to the secondary output terminal of the household appliance for food preparation according to the present invention. Detailed Implementation

[0038] Figure 1 An example of a household appliance 110 for food preparation is shown. The household appliance 110 for food preparation includes a base 101, here in the form of a stand, comprising a generally horizontal base 102 and legs 108 extending vertically upward from the base 101. The base 101 rests on a horizontal workbench. The base 102 includes a receiving area 109 configured to receive a working container 103, which is here typically a removable jar.

[0039] For example, the working container 103 is detachably mounted on the receiving area 109 of the base 102 via a bayonet connection.

[0040] The household appliance 110 for food preparation also includes a head 104, which in this example is hinged to a base 101 about a horizontal axis A0, specifically to a support leg 108. With the head 104 hinged about the horizontal axis A0, it can move between a raised position and a working position, the raised position corresponding to… Figure 9 The diagram shows that the working container 103 can be easily removed from the base 102, and the working position is as follows. Figure 1 , Figure 2 , Figure 6 and Figure 8 As shown. The concepts of "horizontal", "vertical", "top" and "bottom", and the associated orientation, refer to the normal orientation of the household appliance 110 used for food preparation in its working state when the base 101 is placed on a horizontal workbench, corresponding to the representation in the figure.

[0041] The head 104 of the household appliance 110 for food preparation has a longitudinally extending shape, is horizontal in the working position, and is connected to the legs 108 of the base 101 via a rear longitudinal portion, while the front longitudinal portion extends vertically over the base 102 and the working container 103. The head 104 may include... Figure 3a and Figure 3b The motor 301 shown is preferably an electric motor, whose starting and speed can be controlled by a speed selection device 107 including multiple speed positions. For example, the speed selection device 107 is a control knob provided on one side of the support leg 108. The motor 301, located within the head 104, includes a motor shaft oriented along a motor axis, which, depending on the design, can be horizontal or vertical. Alternatively, the motor 301 can be located within the base 101.

[0042] The header 104 includes at least one main output terminal and at least one secondary output terminal. In the example shown in the figure, the header 104 includes:

[0043] -First main output terminal S1,

[0044] -Second main output terminal S2

[0045] - First secondary output terminal S3

[0046] -Second auxiliary output terminal S4, and

[0047] -Third auxiliary output terminal S5.

[0048] The first main output terminal S1 includes (or is associated with) a first main output shaft O1, which is configured to rotate via a motor 301, or more precisely, via the shaft of the motor 301.

[0049] The second main output shaft S2 includes (or is associated with) a second main output shaft O2, which is configured to rotate via a motor 301, or more precisely, via the shaft of the motor 301.

[0050] It can be equivalently said that the motor rotates or the motor shaft rotates.

[0051] The first auxiliary output terminal S3 includes (or is associated with) a first auxiliary output shaft O3, which is configured to rotate via a motor 301, or more precisely, via the shaft of the motor 301.

[0052] The second auxiliary output terminal S4 includes (or is associated with) a second auxiliary output shaft O4, which is configured to be driven to rotate by a motor 301, or more precisely, by the shaft of the motor 301.

[0053] The third auxiliary output terminal S5 includes (or is associated with) a third auxiliary output shaft O5, which is configured to rotate via a motor 301, or more precisely, via the shaft of the motor 301.

[0054] The head 104 includes a first main connector associated with a first main output terminal S1 and configured to allow a first working accessory to be connected to and disconnected from the first main output terminal S1, and to ensure that the first working accessory is driven to rotate via the first main output shaft O1.

[0055] The head 104 includes a second main connector associated with a second main output terminal S2 and configured to allow a second working accessory to be connected to and disconnected from the second main output terminal S2, and to ensure that the second working accessory is driven to rotate via the second main output shaft O2.

[0056] The head 104 includes a first auxiliary connector associated with a first auxiliary output S3 and configured to allow a third working accessory to be connected to and disconnected from the first auxiliary output S3, and to ensure that the third working accessory is driven to rotate via the first auxiliary output shaft O3.

[0057] The head 104 includes a second auxiliary connector associated with a second auxiliary output S4 and configured to allow the fourth working accessory to be associated with and dissociated from the second auxiliary output S4, and to ensure that the fourth working accessory is driven to rotate via the second auxiliary output shaft O4.

[0058] The head 104 includes a third auxiliary connector associated with a third auxiliary output S5 and configured to allow the fifth working accessory to be connected to and disconnected from the third auxiliary output S5, and to ensure that the fifth working accessory is driven to rotate via the third auxiliary output shaft O5.

[0059] In the following text, the term "connector" will be used indiscriminately to refer to the first primary connector, the second primary connector, the first secondary connector, the second secondary connector, or the third secondary connector.

[0060] In the following text, the term "main connector" refers indiscriminately to either the first main connector or the second main connector.

[0061] In the following text, the term "sub-connector" will be used indiscriminately to refer to the first sub-connector, the second sub-connector, or the third sub-connector.

[0062] In the following text, the term "output terminal" refers indiscriminately to the first main output terminal S1, the second main output terminal S2, the first auxiliary output terminal S3, the second auxiliary output terminal S4, or the third auxiliary output terminal S5.

[0063] In the following text, the term "main output terminal" refers indiscriminately to either the first main output terminal S1 or the second main output terminal S2.

[0064] In the following text, the term "sub-output terminal" refers indiscriminately to the first sub-output terminal S3, the second sub-output terminal S4, or the third sub-output terminal S5.

[0065] In the following text, the term "output shaft" refers indiscriminately to the first main output shaft O1, the second main output shaft O2, the first auxiliary output shaft O3, the second auxiliary output shaft O4, or the third auxiliary output shaft O5.

[0066] In the following text, the term "main output shaft" refers indiscriminately to either the first main output shaft O1 or the second main output shaft O2.

[0067] In the following text, the term "sub-output shaft" refers indiscriminately to the first sub-output shaft O3, the second sub-output shaft O4, or the third sub-output shaft O5.

[0068] The two components are detachably connected if they can be easily joined and disconnected, or hooked and unhooked, by the end user of the food preparation appliance 110. Preferably, these operations are performed in a very simple manner without tools or with the aid of one or more tools. The methods of operation for joining and disconnecting and / or hooking and unhooking two detachably connected components preferably include a single gesture, such as push, pull, turn, twist, etc., or a combination of two gestures, such as push-turn, pull-twist, push-twist, etc. Therefore, amovable connections should be distinguished from démontable connections, which are designed to allow maintenance or repair operations on the internal components of the food preparation appliance 110, typically require tools, and usually require multiple consecutive operations to achieve disassembly and assembly, and are reserved for, for example, repair personnel, outside the usual use of the food preparation appliance 110.

[0069] The connector may be formed by a series of hooks extending from the working attachment and engaging with holes provided in the housing wall of the head 104. Thus, the hooks mate with the holes. Furthermore, the hooks or holes may include engaging or resilient fitting devices. The connector may take other forms, such as engaging hooks, one or more hooks, or threads.

[0070] For example, the rotary input shaft of the working attachment may have a shape complementary to the main or auxiliary output shaft, such as having complementary male and female squares, or any other mechanical connection that allows torque to be transmitted during rotation. Preferably, this is achieved through the simple meshing of complementary shapes without the need for tooling intervention.

[0071] Generally in the working position, the fourth working accessory connected to the second auxiliary output end S4 or the fifth working accessory connected to the third auxiliary output end S5 engages in the working container 103 to act on the food contained in the working container 103.

[0072] Household appliances 110 used for food preparation include, for example: Figure 2 The hatch 201 shown is movable or detachable and can be in a closed position in which the hatch 201 mounted on the head 104 prevents access to the first main output terminal S1 and the second main output terminal S2. Figure 2 A household appliance is shown configured with its door 201 in the closed position.

[0073] Figure 1 Another configuration of the household appliance 110 for food preparation is shown, in which the hatch 201 has been removed from the head 104. Figure 1 In the head 104, the first main output terminal S1 and the second main output terminal S2 are located on the upper side, the first auxiliary output terminal S3 is located at the front of the appliance, for example, for connecting accessories such as a cutting machine or a meat mincer, and the second auxiliary output terminal S4 and the third auxiliary output terminal S5 are located on the lower side, for example, for connecting pastry accessories such as an egg beater, a dough mixer or a mixer.

[0074] Figure 3a and Figure 3b The drive unit is shown in both top and bottom views. This drive unit allows the first main output shaft O1, the second main output shaft O2, the first auxiliary output shaft O3, the second auxiliary output shaft O4, and the third auxiliary output shaft O5 to be driven via the shaft of motor 301. The drive unit generally includes a speed reduction device so that the rotational speed of the second main output shaft O2 and the rotational speeds of each of the auxiliary output shafts O3, O4, and O5 are lower than the rotational speed of motor 301. The rotational speed of the first main output shaft O1 is the same as the rotational speed of motor 301. Furthermore, in one embodiment, the speed reduction device is configured such that the rotational speeds of the first auxiliary output shaft O3, the second auxiliary output shaft O4, and the third auxiliary output shaft O5 are lower than the rotational speed of the second main output shaft O2.

[0075] In one embodiment, one or more of the second auxiliary output shaft S4 and the third auxiliary output shaft S5 include eccentric couplings that allow the working attachment to be driven in a satellite motion of two rotational combinations about two parallel axes. These eccentric couplings are particularly advantageous for attachments coupled to the second auxiliary output shaft S4 or the third auxiliary output shaft S5 and operating within the working container 103. For example, they allow the rotation of a kneading tool or whisk suitable for mixing dough or ingredients within the working container 103. In this case, the household appliance 110 for food preparation is also referred to as a "pastry-making robot," although it can generally be used for other production processes besides pastry making.

[0076] The household appliance 110 for food preparation also includes a detection device 106 for detecting the position of the hatch 201.

[0077] In one embodiment, the detection device 106 includes a switch located in the head 104, which is actuated by the door 201 when the door 201 is mounted on the head 104 and thus occupies the closed position.

[0078] Figure 4 The detection device 106 is shown. The detection device 106 includes a Hall effect sensor 401 and a magnet 402.

[0079] exist Figure 4 In the middle, magnet 402 is located on hatch 201, but its position can be reversed with that of Hall effect sensor 401.

[0080] Household appliance 110 for food preparation includes a control unit.

[0081] The control unit is configured to control the rotational speed of the shaft of the motor 301 according to the speed position of the speed selection device 107.

[0082] For at least one speed position, the control unit is also configured to control:

[0083] - When the hatch 201 is in the closed position, the first non-zero speed value of the shaft of the motor 301;

[0084] - When the hatch 201 is not in the closed position, the second non-zero speed value of the shaft of the motor 301 is different from the first non-zero speed value of the shaft of the motor 301.

[0085] Therefore, when the hatch 201 is in the closed position, the household appliance 110 for food preparation uses a first speed range of the motor 301, and when the hatch 201 is not in the closed position, it uses a second speed range of the motor 301. At least one of the first speed values ​​of the motor 301 in the first speed range is different from the second speed value of the motor 301, which corresponds to the second speed range of the motor 301.

[0086] For example, one of the speed positions can correspond to the maximum speed position of motor 301.

[0087] For at least one speed position, the first speed value of motor 301 may be, for example, lower than the second speed value of motor 301.

[0088] In one embodiment, for all speed positions of the speed selection device 107, the first speed value of the motor 301 is less than or equal to the second speed value of the motor 301.

[0089] In one embodiment, the difference between the first speed value and the second speed value of motor 301 is the largest when the speed position is the highest.

[0090] For example, the difference between the first speed value and the second speed value of motor 301 can be between 300 rpm and 3000 rpm or between 1000 rpm and 2000 rpm.

[0091] In one embodiment, for certain speed positions of the speed selection device 107, the first rotational speed of the motor 301 is lower than the second rotational speed of the motor 301. For other speed positions of the speed selection device 107, the first rotational speed of the motor 301 and the second rotational speed of the motor 301 are the same.

[0092] In one embodiment, when the speed of motor 301 is less than 5000 rpm, more specifically when the speed of motor 301 is less than or equal to 4300 rpm, the first speed value and the second speed value of motor 301 are the same.

[0093] For example, the control unit can allow the speed of motor 301 to be controlled between 1700 rpm and 15000 rpm.

[0094] The table below provides the first example of how the rotational speed of the motor 301 functions as a function of the position of the hatch 201 for different speed positions of the speed selection device 107.

[0095] [Table 1]

[0096]

[0097] The table below provides a second example of how the rotational speed of the motor 301 is a function of the position of the hatch 201 for different speed positions of the speed selection device 107.

[0098] [Table 2]

[0099]

[0100] In the example of the second table, for speed positions 4, 7, and 8, the first speed value of motor 301 is different from the first speed value of motor 301 in the example of the first table, which provides the advantage of a more progressive speed gradation.

[0101] In the two examples in the first and second tables, at the "pulse (9)" velocity position:

[0102] - The initial speed of motor 301 is 1200 rpm, which is sufficient to allow the mixture to be made into a slurry in the mixer.

[0103] - The second speed value of motor 301 is equal to 15,000 rpm, which allows for improved performance when using a micro shredder or grinder.

[0104] The control unit includes a processor for executing a computer program. This computer program includes program code instructions for controlling the rotational speed of the motor 301 based on the position of the hatch 201 and the speed position of the speed selection device 107. Furthermore, the forward control unit also includes a memory, specifically for storing the different speeds to be controlled.

[0105] The accessories associated with the first main output terminal S1 and the second main output terminal S2 are, for example... Figures 5a to 5c The mixer bowl 501 shown is associated with the first main output terminal S1 or Figure 7 The miniature crushing bowl 701 shown is associated with the second main output terminal S2.

[0106] These attachments require high rotational speeds. They take the form of attachments driven by a household appliance 110 for food preparation. A common feature of these attachments is a reclosable housing that defines an enclosed internal space for containing the food to be prepared. These attachments include a rotary cutting tool that is driven to rotate about a tool axis (typically vertical). The cutting tool is contained within the enclosed internal space and has a central hub and at least one cutting blade extending radially from the central hub relative to the tool axis. Such attachments are generally referred to as micro-choppers when used for chopping solid products; they are generally referred to as blenders when used for preparing liquid foods. In some embodiments, this reclosable housing may be formed by a container with an upper opening for introducing the food to be prepared, and the lid for reclosing the enclosed internal space in which the food to be prepared is contained during operation. In other embodiments, this reclosable housing may be formed by a tool holder base and a bell-shaped shroud attached to the tool holder base to form a reclosable housing in a closed configuration. The cutting tool is typically positioned near the bottom wall of the reclosable housing, i.e., near the bottom wall of the container or near the tool holder base. The cutting tool is generally supported by this bottom wall, directly or indirectly (e.g., via a connector). Unlike other accessories or cooking utensils, the action of cutting food in these accessories is not due to shearing between the blade and the reverse blade or other surfaces. The action of cutting food is due to the speed of the blade. Therefore, it is understood that in these accessories, the cutting tool must be driven at a high no-load speed, preferably greater than or equal to 5000 rpm, more preferably greater than or equal to 10000 rpm. It is also understood that these accessories must be oriented during operation such that the cutting tool is positioned at the bottom of the reclosable housing and can rotate along a tool axis oriented vertically, or along the main vertical direction, i.e., at an angle of less than 45° to the vertical direction.

[0107] The first main output terminal S1 can receive the mixing bowl 501. In the illustrated embodiment, the mixing bowl 501 includes a tool holder base 501-a (e.g., Figure 5b As shown), the base is relative to the bowl component 501-b (as shown). Figure 5c (As shown) is detachable. The bowl component 501-b includes multiple actuating lugs 501-c at its bottom (e.g., three arranged at 120°, or two arranged at 180°, as shown). Figure 5a and Figure 5c As shown, one of the transmission lugs 501-c is visible. Figure 6 A blender bowl 501 and a household appliance 110 for food preparation are shown, wherein the blender bowl 501 is connected to the household appliance 110 for food preparation via a first main output terminal S1.

[0108] The second main output terminal S2 can accept a miniature crushing bowl 701, also known as a "food processor". Figure 7 As shown. Figure 8 A miniature crushing bowl 701 and a household appliance 110 for food preparation are shown, wherein the blender bowl 701 is connected to the household appliance 110 for food preparation via a second main output terminal S2.

[0109] The first main output terminal S1 and / or the second main output terminal S2 can also accept other accessories, such as juicers or centrifuges.

[0110] The accessories associated with the first output terminal S3 are, for example, a crushing head, an attachment for cutting or grinding, a dough attachment or an attachment for making dough, or a pressing attachment for obtaining juice and / or jam, thus providing great versatility.

[0111] With the aid of a reduction gear, the second auxiliary output S3 is typically driven to rotate at speeds of 50 to 200 revolutions per minute. Furthermore, lower speed positions can also be used for these accessories. These speeds are well-suited for certain types of cooking, and therefore also for certain accessories designed for such tasks.

[0112] Accessories associated with the second output terminal S4 and the third output terminal S5 include, for example, a whisk, a mixer, and a dough hook 901. Figure 9 As shown. In Figure 9 In the middle, the bread dough hook 901 is connected to the household appliance 110 for food preparation via the second main output terminal S4.

Claims

1. A household appliance (110) for food preparation, comprising: - Motor (301) - Main output terminal (S1 or S2), the main output terminal including a main output shaft (O1 or O2) configured to be driven to rotate by the motor (301). - A movable or detachable hatch (201) capable of occupying a closed position, in which the hatch (201) prevents access to the main output terminal (S1 or S2). - Detection device (106) for detecting the position of the hatch (201). - A speed selection device (107), the speed selection device including multiple speed positions, and - A control unit configured to control the rotational speed of the motor (301) based on the speed position of the speed selection device (107). The control unit is also configured to, for at least one velocity position: - When the hatch (201) is in the closed position, control the first speed of the motor (301), and - When the hatch (201) is not in the closed position, control the second speed of the motor (301). The first speed of the motor (301) is different from the second speed of the motor (301), and neither the first speed nor the second speed of the motor (301) is zero. The control unit is configured to control the speed of the motor (301) between 1700 rpm and 15000 rpm.

2. The household appliance (110) for food preparation according to claim 1 further includes: - Secondary output terminals (S3, S4, or S5), which include: - A secondary output shaft (O3, O4 or O5), which is configured to be driven to rotate by the motor (301).

3. The household appliance (110) for food preparation according to claim 1 or 2, wherein the at least one speed position corresponds to the maximum rotational speed position of the motor (301).

4. The household appliance (110) for food preparation according to claim 1 or 2, wherein the first speed of the motor (301) is lower than the second speed of the motor (301).

5. The household appliance (110) for food preparation according to claim 1 or 2, wherein the difference between the first rotational speed and the second rotational speed of the motor (301) is the largest when the speed position is highest.

6. The household appliance (110) for food preparation according to claim 1 or 2, wherein the difference between the first speed and the second speed of the motor (301) is between 300 rpm and 3000 rpm, preferably between 1000 rpm and 2000 rpm.

7. The household appliance (110) for food preparation according to claim 1 or 2, wherein the control unit is configured such that for some of the plurality of speed positions, the first speed and the second speed of the motor (301) are different, and for the other speed positions, the first speed and the second speed of the motor (301) are the same.

8. The household appliance (110) for food preparation according to claim 7, wherein the control unit is configured such that when the speed of the motor (301) is less than 5000 rpm, the first speed of the motor (301) and the second speed of the motor (301) are the same.

9. The household appliance (110) for food preparation according to claim 2, further comprising: - A base (101), the base comprising: a pedestal (102) having a receiving area configured to receive a work container (103); and - Head (104), which is connected to the base (101) and includes: - Main output terminal (S1 or S2). - A main connector configured to allow the first working attachment to be engaged and disengaged on the main output (S2 or S2), and to ensure that the first working attachment is driven to rotate via the main output shaft (O1 or O2). - Secondary output terminals (S3, S4, or S5), and - A secondary connector configured to allow the second working attachment to be engaged and disengaged at a secondary output end (S3, S4, or S5) and to ensure that the second working attachment is driven to rotate via a secondary output shaft (O3, O4, or O5).

10. The household appliance (110) for food preparation according to claim 9, wherein the secondary output terminal (S3, S4 or S5) is a first secondary output terminal (S3), the secondary output shaft (O3, O4 or O5) is a first secondary output shaft (O3), the secondary connector is a first secondary connector, and the head (104) further includes a second secondary output terminal (S4), the second secondary output terminal (S4) including a second secondary output shaft (O4), the second secondary output shaft being configured to be driven to rotate by the motor (301). The head (104) also includes a second auxiliary connector configured to allow the second working attachment to be engaged and disengaged from the second auxiliary output end (S3, S4, or S5), and to ensure that the second working attachment is driven to rotate via the second auxiliary output shaft (O3, O4, or O5). The second auxiliary output terminal (S4) is located below the head (104) or at the front end of the head (104).

11. The household appliance (110) for food preparation according to claim 10, wherein: - The first auxiliary output shaft (O3) is configured to rotate via a reducer driven by the motor (301), such that the rotational speed of the first auxiliary output shaft (O3) is slower than the rotational speed of the main output shafts (O1, O2), and / or - The second auxiliary output shaft (O4) is configured to be driven to rotate by the motor (301) via a reducer, such that the rotational speed of the second auxiliary output shaft (O4) is slower than the rotational speed of the main output shaft (O1, O2).

12. The household appliance (110) for food preparation according to any one of claims 9 to 11, wherein the detection device (106) comprises a Hall effect sensor (401) and a magnet (402), the magnet (402) being located on the hatch (201) and the Hall effect sensor (401) being located in the head (104).

13. The household appliance (110) for food preparation according to any one of claims 9 to 11, wherein the detection device (106) includes a switch located in the head (104) and the switch is actuated by the door (201) when the door (201) is in the closed position.

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