CN211155350U - Food processor - Google Patents

Abstract

The application discloses cooking machine. This cooking machine includes the controller, has the upper cover of first conductor layer, has the lower staving of second conductor layer. The upper cover is assembled to the lower tub to form a cavity for holding food. The first conductor layer and the second conductor layer are insulated and isolated, and capacitance is formed between the first conductor layer and the second conductor layer correspondingly. The controller with first conductor layer with second conductor layer electricity is connected, in order to detect the cavity is holding under the condition that water or food were boiled, first conductor layer with capacitance value between the second conductor layer. Because the current volume of cavity is confirmed through the capacitance value, not only can very conveniently know how much of adding water, the control food that also can be fine boils, prevents that food from spilling over, judges the precision height moreover.

Description

Food processor

Technical Field

The application relates to a small household electrical appliance technical field especially relates to cooking machine.

Background

The food processer comprises an upper cover, a lower barrel body and a controller. The upper cover and the lower barrel body form a cavity for holding food. The controller is used for controlling the cooking of the food in the cavity. Probes are typically provided to inhibit food spillage due to whipping and/or heating during cooking. However, in some use environments, the use of probes does not completely avoid the food spillage phenomenon described above.

Therefore, there is a need in the art for a solution to the above problems.

SUMMERY OF THE UTILITY MODEL

In order to overcome some or all problems in the related art, the application provides a food processor. This cooking machine includes the controller, has the upper cover of first conductor layer, has the lower staving of second conductor layer. The upper cover is assembled on the lower barrel body to form a cavity for containing food. The first conductor layer and the second conductor layer are insulated and isolated, and a capacitance effect is formed between the first conductor layer and the second conductor layer. The controller is connected to the first conductor layer and the second conductor layer, and prevents food from overflowing according to the detected capacitance value between the first conductor layer and the second conductor layer.

The food processor can obtain the volume and/or the change of the volume of the food in the cavity by detecting the capacitance value between the first conductor layer and the second conductor layer, and then can select correct operation (for example, reducing the whipping speed or heating power) to avoid the food overflowing. Specifically, after the capacitance value is obtained, when water is just added, the current volume of the cavity can be determined according to the capacitance value, and then the current water level is determined, so that the amount of added water can be conveniently judged; during the cooking process, whether the food overflows can be determined according to the current volume, and then corresponding measures are taken to prevent the food from overflowing, for example, under the condition that the food overflows, the heating driving circuit is timely disconnected, or the heating power and/or time and the like of the heating driving circuit are reduced according to the current volume, the cooked time and the like, in addition, the current volume before is judged through the capacitance value, and further, the food overflow can be prevented, so that the food processor does not need to be provided with an overflow prevention circuit, and the cost and the design difficulty are reduced; finally, the capacitance value corresponds to the current volume of the cavity, and further, the detection accuracy is high.

Optionally, the lower barrel body comprises a barrel body inner surface forming the cavity together with the upper cover, and at least part of the barrel body inner surface is a conductor and serves as the second conductor layer; or, the inner surface of the barrel body is used as an insulating layer to cover the second conductor layer. Because at least part of the inner surface of the barrel body is used as the second conductor layer, convenience is brought to the layout of all parts, lead wires and the like, and convenience is brought to the processing of the lower barrel body.

Optionally, the whole internal surface of the barrel body is a conductor and serves as the second conductor layer, so that the situation that the height of food boiling is greater than the height of the highest position of the second conductor layer relative to the bottom of the barrel body under certain conditions is avoided, the capacitance value between the second conductor layer and the first conductor layer can be detected more accurately, and the detection accuracy is improved.

Optionally, the upper cover comprises an upper cover lower surface forming the cavity with the lower barrel, and at least part of the surface of the upper cover lower surface is a conductor and serves as the first conductor layer. Because at least part of the surface of the lower surface of the upper cover is provided with the conductor as the first conductor layer, convenience is brought to the layout of each part, lead wires and the like, and the processing of the upper cover tape is also facilitated.

Or, the lower surface of the upper cover is an insulator, and the first conductor layer is covered by the lower surface of the upper cover. Because the first conductor layer is covered by the insulator, food (mainly liquid) in the cavity can not conduct the first conductor layer and the second conductor layer, and the accuracy of capacitance value measurement is ensured.

Optionally, the whole conductor that is of upper cover lower surface is regarded as first conductor layer, like this, it is more convenient the processing of upper cover, moreover, second conductor layer is under the holistic condition of staving internal surface, the area that both face is bigger and both enclose into the volume of cavity and be exactly the actual volume of cavity, can be more accurate measure the capacitance value between the two, further improved the degree of accuracy of judgement.

Optionally, the upper cover comprises a base, a driving motor, a rotating shaft and a blade, the base comprises a housing, the lower surface of the upper cover is arranged on the housing, the driving motor is located in the housing, one end of the rotating shaft is connected to the driving motor, and the other end of the rotating shaft penetrates through the lower surface of the upper cover to extend into the cavity and is connected with the blade located in the cavity; or, the lower barrel body comprises a driving motor, a blade and a rotating shaft, the blade is located in the lower barrel body, the rotating shaft is connected with the driving motor and the blade, and the rotating shaft penetrates through the inner surface of the barrel body and then extends into the lower barrel body.

Optionally, the food processor comprises an isolation pad disposed between the first conductor layer and the second conductor layer to achieve the insulating isolation.

Optionally, the controller includes a processing module, a zero-crossing detection circuit connected to the processing module and configured to detect whether a mains supply crosses zero, a motor driving circuit connected to the processing module, a heating driving circuit connected to the processing module, and a power supply circuit configured to supply power to the processing module, the heating driving circuit, and the motor driving circuit; the processing module is provided with a detection port and a grounding bit, the detection port of the processing module is connected with the first conductor layer, and the grounding bit of the processing module is connected with the second conductor layer, or the detection port of the processing module is connected with the second conductor layer and the grounding bit of the processing module is connected with the first conductor layer. In this way, the controller does not include an anti-overflow circuit, reducing the cost and design difficulty of the controller.

Optionally, the processing module is a single chip microcomputer with a minimum circuit, the detection port is an input port of the minimum circuit, and the ground is a ground of the single chip microcomputer.

Optionally, the controller determines a current volume of the cavity according to the detected capacitance value, and controls the cooking of the food in the cavity according to the current volume.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic structural diagram of a food processor;

fig. 2 is a schematic structural diagram of another food processor;

fig. 3 is a circuit block diagram of a controller for the food processor shown in fig. 2;

FIG. 4 is a circuit diagram of a power supply circuit, a zero crossing detection circuit and an EMC circuit of the controller;

FIG. 5 is a schematic diagram of a processing module of the controller;

fig. 6 is a circuit diagram of a motor drive circuit of the controller;

fig. 7 is a circuit diagram of a heating drive circuit of the controller.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Similarly, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one; "plurality" means two or more than two. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items.

Exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following embodiments, features of the embodiments can be supplemented with each other or combined with each other without conflict.

The inventor of the application finds that a food processor capable of preventing food from overflowing is needed in the industry in the process of developing the food processor. As shown in fig. 1, the food processor 100 includes an upper cover 1, a lower barrel 2, a probe 3, and a controller (not shown). The upper cover 1 has an upper cover lower surface 11. The lower tub 2 has a tub inner surface 21. The upper lid 1 is assembled with the lower tub 2 such that the upper lid lower surface 11 and the tub inner surface 21 constitute a cavity 4 for holding food. The probe 3 is mounted on the upper cover 1 and connected to the controller. During the cooking process of the food, a large amount of bubbles are generated, and the liquid level is increased due to the rising of the air pressure in the cavity 4. The probe 3 is brought into contact with an elevated liquid level or a large number of bubbles to generate a detection signal. The controller controls the cooking of the food according to the detection signal, for example, controls the heating driving circuit to be powered off, and further prevents the food from overflowing.

However, the above-mentioned scheme has a problem that the bubbles cannot contact the probe 3, for example, the bubbles cannot contact the probe 3 due to a small amount of bubbles, or the bubbles cannot contact the probe 3 due to a certain amount of bubbles, but the contact between the bubbles and the probe 3 is unstable (sometimes contact or sometimes non-contact), so that the scheme using the probe 3 cannot accurately detect the state of the food in the cavity, and the detection result is inaccurate.

In order to solve at least the problem that the detection result of the probe scheme is inaccurate, the inventor provides a scheme for judging the current volume of the cavity by using a capacitance value so as to control the food boiling. In this scheme, this cooking machine includes upper cover and lower staving. The upper cover is provided with a first conductor layer, and the lower barrel is provided with a second conductor layer. And a capacitance effect is formed between the first conductor layer and the second conductor layer. The controller is connected with the first conductor layer and the second conductor layer, a capacitance value between the first conductor layer and the second conductor layer is detected, the capacitance value has a corresponding relation with the current volume of the cavity, the current water level can be deduced according to the capacitance value before boiling, and then the added water quantity is judged; during the cooking process, the height of the bubbles relative to the opening of the lower barrel body can be deduced according to the capacitance value, so that whether the food overflows or not is judged, and if the food overflows, measures (such as controlling a heating driving circuit to work) are taken to prevent the food from overflowing. The controller may be connected to the first conductor layer and the second conductor layer in one of two ways: 1) the detection port of the controller is connected to the first conductor layer, and the ground bit of the controller is connected to the second conductor layer; 2) the detection port of the controller is connected to the second conductor layer and the ground of the controller is connected to the first conductor layer. Above-mentioned scheme passes through the current volume of capacitance value judgement cavity, can be convenient judge current water level and can prevent that food from spilling over, in addition, compare with the scheme that adopts the probe, no matter how much the current volume that can both obtain the cavity of bubble, so, the testing result is accurate, can not have the condition that the bubble can not stable contact probe or contact can not reach the probe, the boil out of control food that can be better, in addition, still has following beneficial effect: 1) the scheme is characterized in that the upper cover and the lower barrel are respectively provided with the conductor layers, and then the two conductor layers are connected to the controller, so that the complexity of design is reduced; 2) whether the overflow happens or not can be judged according to the volume, and an overflow-proof probe and a corresponding overflow-proof circuit are omitted under the condition of having the overflow-proof function, so that the cost is reduced; 3) the parameter of increasing the current volume makes the signal detected by the food processor more perfect.

Referring to fig. 2, in one embodiment, the inner surface 21 is at least partially a conductor and serves as the first conductor layer, for example, the inner surface 21 includes a bottom surface 211 and a side surface 212, the bottom surface 211 is made of a conductor (e.g., metal) and the side surface 212 is made of other material (e.g., plastic), or the side surface is a conductor (e.g., metal) and the bottom surface 211 is made of other material (e.g., plastic). Of course, in another embodiment, in order to determine the volume of the cavity 4 more accurately and further determine the determination result more accurately, the entire inner surface 21 of the barrel is a conductor and serves as the second conductor layer. The skilled artisan will appreciate that in another embodiment, the barrel inner surface 21 is an insulating layer covering the second conductor layer, e.g., the barrel 2 includes a barrel wall 22, and the second conductor layer is located within the barrel wall 22 and covered by the barrel inner surface 21. The second conductive layer may be located at the side of the tub wall 22 and covered by the side surface 212, or may be located at the bottom and covered by the bottom surface 211, and of course, the shape of the second conductive layer may also be located inside the tub wall 22, which is the same as the shape of the inner surface 21 of the tub body. The skilled artisan will appreciate that the barrel inner surface 21 is covered by the second conductor layer, and that there may be no other layer between the barrel inner surface 21 and the second conductor layer, or there may be other layers.

In one embodiment, the upper cover 1 includes an upper cover lower surface 11. The lower surface 11 of the upper cover is at least partially a conductor as said first conductor layer. In one embodiment, the entire lower lid surface 11 is a conductive layer as the first conductive layer. In one embodiment, the upper cover 1 includes a base 12, a driving motor 13, and a blade assembly 14. The base 12 includes a housing and the lower surface 11 of the upper cover forming an accommodating space with the housing. The lid lower surface 11 covers the opening of the lower tub 2 and forms the cavity 4 with the tub inner surface 21. The driving motor 13 is disposed in the accommodating space, and in an embodiment, the controller 6 may also be disposed in the accommodating space. The blade assembly 14 includes a spindle 141 and a blade 142. One end of the rotating shaft 141 is connected to the driving motor, and the other end of the rotating shaft passes through the lower surface 11 of the upper cover and extends into the cavity 4 to be connected with the blade 142 positioned in the cavity 4. The skilled person will appreciate that in an embodiment, the first conductor layer may also be located inside the upper cover 1, for example, in the accommodating space. In a preferred embodiment, the inner surface 21 of the barrel is the second conductive layer and the lower surface 11 of the lid is the first conductive layer.

With reference to fig. 2, in order to realize the isolation between the first conductive layer and the second conductive layer, the food processor 200 includes an isolation pad 5 disposed between the first conductive layer and the second conductive layer. In the case where the first conductive layer is the lower lid surface 11 and the second conductive layer is the inner barrel surface 21, it can be understood that the isolation pad 5 isolates the upper lid 1 from the lower barrel 2 to separate the cavity 4 into two parts isolated from each other, for example, the two opposite surfaces of the isolation pad 5 are respectively in contact with the upper lid 1 and the lower barrel 2.

Referring to fig. 2 and 3 in conjunction with fig. 1, in comparison with the solution using the probe 3, the above solution can eliminate the probe 3 and the corresponding anti-overflow circuit, and in this case, the controller 6 includes a processing module 61, a zero-crossing detection circuit 62, a motor driving circuit 63, a heating driving circuit 64 and a power supply circuit 65. The zero-crossing detection circuit 62 is configured to detect whether the commercial power crosses zero, and transmit a detection result of whether the commercial power crosses zero to the processing module 61. With reference to fig. 4 and 5, the output end SYNC of the zero-crossing detection circuit 62 is connected to pin 3(SYNC) of the processing module 61 to implement transmission of the detection result. The zero crossing detection circuit 62 may also be implemented in the prior art, as shown in fig. 4.

Referring to fig. 5 in conjunction with fig. 3 and 4, the processing module 61 has a detection port and a ground status, the controller 6 is connected to the first conductor layer and the second conductor layer, that is, the processing module 61 is connected to the first conductor layer and the second conductor layer, including two conditions, that is, 1) the detection port of the processing module 61 is connected to the first conductor layer, and the ground status of the processing module 61 is connected to the second conductor layer, and 2) the detection port of the processing module 61 is connected to the second conductor layer, and the ground status of the processing module 61 is connected to the first conductor layer, and the volume corresponding to stirring food is referred to as a first current volume, and the volume corresponding to heating food is referred to as a second current volume, and the processing module 61 controls the motor driving circuit 63 to operate according to the detection result of the zero-crossing detection circuit 62 and the first current volume of the cavity 4, or controls the heating driving circuit 64 to operate according to the second current volume of the cavity 4, as a second current volume of the processing module 61 is connected to the heating driving circuit 64, in an embodiment, the processing module 61 is a single chip microcomputer with a single chip microcomputer having a minimum circuitry, as shown in fig. 5, and a power supply circuit, wherein the single chip microcomputer 7 is connected to the single chip microcomputer driving circuit, and the single chip microcomputer driving circuit is connected to the single chip microcomputer driving circuit, and the single chip microcomputer driving circuit, and the single chip microcomputer driving circuit is connected to the single chip microcomputer driving circuit, and the single chip microcomputer driving circuit, the single chip microcomputer driving circuit is connected to the single chip microcomputer driving circuit, and the single chip microcomputer driving circuit, the single chip microcomputer driving circuit is connected to the single chip microcomputer driving circuit, the single chip microcomputer driving circuit.

Referring to fig. 1 and 2, a skilled person can understand that the upper cover 1 is provided with a first conductor layer and the lower barrel 2 is provided with a second conductor layer, and the scheme of determining the current volume of the cavity 4 by detecting the capacitance between the first conductor layer and the second conductor layer can also be applied to a food processor in which a driving motor and a blade assembly are provided in the lower barrel, in which case, the upper cover 1 is only used as a cover, the lower barrel can be split, for example, the lower barrel comprises a base provided with a driving motor and a barrel body provided with the blade assembly (a blade and a rotating shaft), and in the case that the barrel body is placed on the base, the driving motor drives the rotating shaft to rotate so as to drive the blade to rotate; or the driving motor and the blade component are arranged on the lower barrel body in an integral manner.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

Claims (10)

1. A food processor is characterized by comprising a controller (6), an upper cover (1) with a first conductor layer and a lower barrel body (2) with a second conductor layer;

the upper cover (1) is assembled on the lower barrel body (2) to form a cavity (4) for containing food;

the first conductor layer and the second conductor layer are insulated and isolated, and a capacitance effect is formed between the first conductor layer and the second conductor layer;

the controller (6) is connected to the first and second conductor layers to prevent food spillage based on the detected capacitance value between the first and second conductor layers.

2. The food processor of claim 1, wherein the lower barrel body (2) comprises an inner barrel body surface (21) forming the cavity (4) with the upper cover (1); at least a portion of the barrel inner surface (21) is a conductor and acts as the second conductor layer, or the barrel inner surface (21) acts as an insulating layer covering the second conductor layer.

3. The food processor of claim 2, wherein the inner surface (21) of the barrel is entirely a conductor and serves as the second conductor layer.

4. The food processor of any one of claims 1 to 3, wherein the upper cover (1) comprises an upper cover lower surface (11) forming the cavity (4) with the lower barrel body (2); at least part of the surface of the lower cover surface (11) is a conductor and serves as the first conductor layer, or the lower cover surface (11) is an insulator and the first conductor layer is covered by the lower cover surface (11).

5. The food processor of claim 4, wherein the whole of the lower surface (11) of the upper cover is a conductor and serves as the first conductor layer.

6. The food processor according to claim 4, wherein the upper cover (1) comprises a base (12), a driving motor (13), a rotating shaft (141) and a blade (142), the base (12) comprises a housing, the lower surface (11) of the upper cover is arranged in the housing, the driving motor (13) is positioned in the housing, one end of the rotating shaft (141) is connected to the driving motor (13), and the other end of the rotating shaft penetrates through the lower surface (11) of the upper cover to extend into the cavity (4) and is connected with the blade (142) positioned in the cavity (4);

or, the lower barrel body comprises a driving motor, a blade and a rotating shaft, the blade is located in the lower barrel body, the rotating shaft is connected with the driving motor and the blade, and the rotating shaft penetrates through the inner surface of the barrel body and then extends into the lower barrel body.

7. The food processor of claim 1, comprising an isolation pad (5) disposed between the first and second conductor layers to achieve insulation isolation of the first and second conductor layers.

8. The food processor of claim 1, wherein the controller (6) comprises a processing module (61), a zero-crossing detection circuit (62) connected to the processing module (61) for detecting whether the mains power crosses zero, a motor drive circuit (63) connected to the processing module (61), a heating drive circuit (64) connected to the processing module (61), and a power supply circuit (65) for supplying power to the processing module (61), the heating drive circuit (64), and the motor drive circuit (63);

the processing module (61) is provided with a detection port and a grounding bit, the detection port of the processing module (61) is connected with the first conductor layer, and the grounding bit of the processing module (61) is connected with the second conductor layer, or the detection port of the processing module (61) is connected with the second conductor layer and the grounding bit of the processing module (61) is connected with the first conductor layer.

9. The food processor of claim 8, wherein the processing module is a single-chip microcomputer with a minimum circuit, the detection port is an input port of the minimum circuit, and the ground is a ground of the single-chip microcomputer.

10. The food processor of claim 1, wherein the controller determines a current volume of the cavity based on the detected capacitance value and controls the cooking of food contained in the cavity based on the current volume.

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