CN209733662U

CN209733662U - Cooking machine heating circuit and cooking machine

Info

Publication number: CN209733662U
Application number: CN201821963094.2U
Authority: CN
Inventors: 丁永刚; 代松
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Priority date: 2018-11-27
Filing date: 2018-11-27
Publication date: 2019-12-06
Anticipated expiration: 2028-11-27

Abstract

The application provides a cooking machine heating circuit and cooking machine. Cooking machine heating circuit includes: a heat generating plate including a first terminal and a second terminal, the first terminal being electrically connected to a live wire; the heating driving module is electrically connected with the second wiring end of the heating plate and is electrically connected to the zero line; the dry burning detection module is electrically connected with the second wiring end of the heating plate; the controller is electrically connected with the heating driving module and the dry burning detection module and controls the on-off of the heating driving module; when the heating driving module is conducted, the second wiring end of the heating plate is connected to a zero line through the heating driving module to heat; when the heating driving module is disconnected, the controller is connected to the live wire through the dry burning detection module and the heating plate, detects a signal of the dry burning detection module, and judges whether dry burning is performed or not.

Description

Cooking machine heating circuit and cooking machine

Technical Field

The application relates to the technical field of household appliances, in particular to a food processor heating circuit and a food processor.

Background

Under the general condition, be provided with the dish that generates heat in the cooking machine, the controller includes the detection module that burns futilely, and the detection module that burns futilely will burn futilely to the dish that generates heat and detect, among the prior art, connection controller is more with the connecting wire of the dish that generates heat, and this makes the installation inconvenient and the cost is higher.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application provides a cooking machine heating circuit and cooking machine, can reduce the connecting wire between controller and the dish that generates heat, simplifies connection structure, reduce cost.

Specifically, the method is realized through the following technical scheme:

A food processor heating circuit, comprising:

a heat generating plate including a first terminal and a second terminal, the first terminal being electrically connected to a live wire;

The heating driving module is electrically connected with the second wiring end of the heating plate and is electrically connected to the zero line;

The dry burning detection module is electrically connected with the second wiring end of the heating plate; and

The controller is electrically connected with the heating driving module and the dry burning detection module and controls the on-off of the heating driving module; when the heating driving module is conducted, the second wiring end of the heating plate is connected to a zero line through the heating driving module to heat; when the heating driving module is disconnected, the controller is connected to the live wire through the dry burning detection module and the heating plate, detects a signal of the dry burning detection module, and judges whether dry burning is performed or not.

Optionally, the dry-burning detection module includes a zero-crossing detection circuit, the zero-crossing detection circuit detects a zero-crossing point of the alternating current to generate a zero-crossing point signal, and when the heating driving module is turned off, the controller detects whether dry burning is performed according to whether the zero-crossing point signal exists.

Optionally, the zero-cross detection circuit includes a first diode and a second diode, an anode of the first diode is connected to a cathode of the second diode, and a cathode of the first diode is grounded; the anode of the second diode is connected with a direct current power supply,

the zero-crossing detection circuit comprises a zero-crossing signal output port, the zero-crossing signal output port is led out from the anode of the first diode, and the controller is connected with the dry burning detection module through the zero-crossing signal output port.

Optionally, the zero-crossing detection circuit further includes a resistor connected between the second terminal and the anode of the first diode.

optionally, the heating driving module includes a transfer switch, the second terminal is connected to the heating driving module through the transfer switch, and the transfer switch includes a relay.

optionally, the heating driving module includes a heating control signal input port and a triode, a base of the triode is connected to the heating control signal input port, a collector is connected to the heating driving module and to the dc power supply, and an emitter is grounded.

Optionally, a resistor is connected between the heating control signal input port and the triode.

Optionally, the resistor includes a resistor R31, a resistor R32, and a resistor R33,

The resistor R31 and the resistor R33 are connected in series between the heating control signal input port and the base of the triode, and the resistor R32 and the resistor R33 are connected in series between the heating control signal input port and the emitter of the triode.

Optionally, the heating plate includes a heating element and a temperature controller connected in series between the first terminal and the second terminal.

A cooking machine comprises the heating circuit of any one of the above.

The technical scheme provided by the application can achieve the following beneficial effects:

The application provides a cooking machine heating circuit, wherein, the dish that generates heat includes two wiring ends, namely, first wiring end and second wiring end, heating drive module all is connected with the second wiring end with dry combustion method detection module, and can make dry combustion method detection module according to the different signals of the state output of the dish that generates heat, thereby realize dry combustion method and detect, this scheme is than heating drive module and dry combustion method detection module among the prior art and is connected respectively in the scheme of the different wiring ends of the dish that generates heat, the quantity of connecting wire has been reduced, connection structure has been simplified, and the cost is reduced.

Drawings

Fig. 1 is a schematic view of a food processor according to an exemplary embodiment of the present application;

fig. 2 is a wiring diagram of a heating circuit of the food processor according to an exemplary embodiment of the present application;

Fig. 3 is a schematic diagram of a controller of a food processor according to an exemplary embodiment of the present application;

fig. 4 is a wiring diagram of a light-emitting circuit of a food processor according to an exemplary embodiment of the present application;

Fig. 5 is a wiring diagram of a processor sound-generating circuit according to an exemplary embodiment of the present application;

Fig. 6 is a wiring diagram of a food processor adjusting circuit according to an exemplary embodiment of the present application;

Fig. 7 is a wiring diagram of a heating circuit and a switching circuit of the food processor according to an exemplary embodiment of the present application.

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. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of this application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, 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" or "a number" means two or more. Unless otherwise specified, "front", "back", "lower" and/or "upper", "top", "bottom", and the like are for ease of description only 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. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Referring to fig. 1, fig. 1 shows a schematic diagram of a food processor according to an exemplary embodiment of the present application. The food processor 10 of the embodiment of the present application includes a main body 11 and a cup assembly 12, wherein the cup assembly 12 is detachably assembled to the main body 11, and the two are separated from each other if necessary, but not limited thereto, and the two can also be kept relatively fixed.

Cup subassembly 12 includes the cup and sets up in the dish that generates heat of cup bottom, and the dish that generates heat can heat the cup after the circular telegram to the heating holds the edible material in cup 120.

Referring to fig. 2 and fig. 3, fig. 2 shows a schematic diagram of a heating circuit of a food processor according to an exemplary embodiment of the present application.

the food processor 10 further includes a heating circuit of the food processor, hereinafter referred to as heating circuit for short, the heating circuit includes a controller 110, a heating driving module 112, a dry-heating detecting module 114 and a heating plate 120, wherein the controller 110, the heating driving module 112 and the dry-heating detecting module 114 are disposed in the host 11.

Specifically, the heat generating plate 120 includes a first terminal 1200 and a second terminal 1202, the first terminal 1200 is electrically connected to the live line L of alternating current, and the second terminal 1202 is connected to the heating driving module 112 and is further electrically connected to the neutral line N of alternating current. The second terminal 1202 is also connected to the dry-fire detection module 114, that is, the heating driving module 112 and the dry-fire detection module 114 are both connected to the heat generating plate 120 through the second terminal 1202.

the controller 110 is electrically connected to the heating driving module 112 and the dry-fire detection module 114, respectively, and the controller 110 includes a heating control signal output port RLY, which can output a heating control signal to control the on/off of the heating driving module 112. When the heating drive module 112 is turned on, the second terminal 1202 of the heat generating tray 120 is connected to the neutral line N through the heating drive module 112. At this time, the first terminal 1200 and the second terminal 1202 of the heating plate 120 are respectively connected to the live line L and the neutral line N, the heating plate 120 is powered on, and the food processor 10 is in a heating state; when the heating driving module 112 is turned off, the controller 110 is connected to the live wire L through the dry-fire detection module 114 and the heating plate 120, and at this time, the controller 110 may detect a signal output by the dry-fire detection module 114 to determine whether dry-fire occurs.

According to the above description, it can be known that the heating plate 120 is provided with two terminals, that is, the first terminal 1200 and the second terminal 1202, the heating driving module 112 and the dry-fire detection module 114 are both connected to the second terminal 1202, and the dry-fire detection module 114 can output different signals according to the state of the heating plate 120, thereby implementing dry-fire detection. The heating plate 120 is connected with an upper coupler in the cup assembly 12, and the upper coupler in the cup assembly 12 is connected with a lower coupler in the main machine 11 in an inserting manner. It will be readily appreciated that the reduced number of terminals on the heater tray 120 allows for a reduced number of terminal pins for both the lower coupler in the host 11 and the upper coupler in the cup assembly 12.

with continued reference to fig. 2, the heating driving module 112 includes a heating control signal input port RLY connected to the heating control signal output port RLY for receiving the heating control signal, and a switch K1. The heating control signal controls the on/off of the switch K1, so that the heating driving module 112 can be controlled to be turned on or off. In one embodiment, the switch K1 may comprise a relay. The relay can control a circuit with high power by a very tiny control quantity, and meanwhile, the relay also has the function of coupling isolation. The relay may be configured as an electromagnetic relay that operates by the action of an attractive force generated between the electromagnetic core and the armature by current in the input circuit.

In one embodiment, as shown in fig. 2, the heater driving module 112 includes a transistor Q1, a base of the transistor Q1 is connected to the heater control signal input terminal RLY, a collector is connected to the switch K1 and connected to the dc power source, and an emitter is grounded. In one embodiment, the voltage of the DC power supply may be-12V.

When the heating control signal input port RLY receives the low level, the transistor Q1 is turned on, the switch K1 is in a closed state, and the second terminal 1202 of the hot plate 120 is connected to the hot line L through the switch K1, and heating is started. On the contrary, when the heating control signal input port RLY receives the high level, the transistor Q1 is turned off, the switch K1 is in the off state, the heating driving module 112 is turned off, the second terminal 1202 of the hot plate 120 is disconnected from the live line L, and the heating is stopped. Therefore, the heating control signal output by the controller 110 can control the switch K1 to be intermittently turned on and off, thereby achieving intermittent heating.

in an alternative embodiment, the heating driver module 112 may further include a resistor coupled between the heating control signal input terminal RLY and the transistor Q1. Specifically, a resistor R31 and a resistor R32 are connected in series between the heating control signal input port RLY and the base of the transistor Q1, and a resistor R32 and a resistor R33 are connected in series between the heating control signal input port RLY and the emitter of the transistor Q1.

In addition, the heating driving module 112 may further include a diode D801, the diode D801 is connected in parallel with the switch K1, an anode of the diode D801 is connected to the dc power source, and a cathode of the diode D801 is connected to the collector of the transistor Q1.

as is known in the foregoing, when the switch K1 is in the off state, the controller 110 is connected to the live line L through the dry-fire detection module 114 and the hot plate 120, and the controller 110 can detect whether the fire is dry-fire.

In a specific embodiment, the dry burning detection module 114 may include a zero-crossing detection circuit, which detects a zero-crossing point of the alternating current and generates a zero-crossing signal, and the controller 110 detects whether the dry burning is performed according to whether the zero-crossing signal is present in the dry burning detection module 114 when the heating driving module 112 is turned off.

In the embodiment shown in fig. 2, the heating plate 120 includes a heating element 1204 and a temperature controller 1206 connected in series between a first terminal 1200 and a second terminal 1202, and the zero-crossing detection circuit may be connected to a zero-crossing signal or not according to on/off of the temperature controller 1206.

specifically, the controller 110 includes a ZERO-cross signal input port ZERO, and the ZERO-cross detection circuit includes a ZERO-cross signal output port ZERO, which is connected to the ZERO-cross signal output port ZERO.

the zero-crossing detection circuit comprises a first diode D11 and a second diode D12, wherein the anode of the first diode D11 is connected with the cathode of the second diode D12, the cathode of the first diode D11 is grounded, and the anode of the second diode D12 is connected with another direct-current power supply. A ZERO-cross signal output port ZERO is led out from the positive electrode of the first diode D11. According to one embodiment, the voltage of the DC power supply may be-5V.

When the heating driving module 112 is turned off, the dry-fire detection module 114 is connected to the live wire L through the heating plate 120, if the temperature controller 1206 is in the on state, the dry-fire detection module 114 is communicated with the live wire, and can detect a zero-crossing point of the input alternating current, and the controller 110 can receive a zero-crossing point signal, thereby determining that the heating plate 120 is not in the dry-fire state; if the temperature controller 1206 is in the off state, the dry-fire detection module 114 is disconnected from the live wire L, and the controller 110 cannot detect a zero-crossing signal, it can be determined that the heating plate 120 is in the dry-fire state, so that the detection of dry-fire is realized.

Further, the zero-cross detection circuit further includes resistors R28, R29 and R30 connected between the second terminal 1202 and the anode of the first diode D11, and the resistors R28, R29 and R30 are connected in series.

although the specific embodiment that the dry combustion detection module 114 includes the zero-crossing detection circuit is described above, it should be understood by those skilled in the art that the dry combustion detection module 114 is not limited to include only the zero-crossing detection circuit, but may include other detection circuits, and determines whether to dry combustion or not by outputting corresponding signals. Such as a voltage sense signal, a current sense signal, etc.

Referring to fig. 4 to 6, the food processor 10 further includes a light emitting circuit 113, a sound emitting circuit 115, and an adjusting circuit 117 disposed in the host 11. Accordingly, the controller 110 also includes ports that electrically connect to the various circuits. Specifically, the controller 110 includes a DIG port connected to the light emitting circuit 113, a BUZ port connected to the sound emitting circuit 115, and a PD port connected to the adjusting circuit 117.

When the heating plate 120 is dry-burned, the controller 110 can control the light emitting diode LED9 in the light emitting circuit 113 to emit light or control the buzzer BZ1 in the sound emitting circuit 115 to emit sound to remind the user to turn off the power supply. The adjustable resistor R14 in the adjustment circuit 117 may be shifted in position in response to a control signal from the controller 110 to change the output, e.g., change the speed of the motor, etc.

Referring to fig. 7, the food processor 10 further includes a switch circuit 119, the switch circuit 119 is connected to the live line L and the neutral line N, the switch circuit 119 includes an ac/dc conversion portion and a dc conversion portion, the ac/dc conversion portion can convert ac into dc, and the dc conversion portion can change voltage of the dc.

In one embodiment, the AC/DC conversion part can convert AC power into DC power of-12V and DC power of-12V to power the relay. The dc converting part may convert the dc power of-12V into dc power of-5V, and the dc power of-5V may supply power to the controller 110.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A cooking machine heating circuit, characterized by, includes:

A heat generating plate (120) comprising a first terminal (1200) and a second terminal (1202), the first terminal (1200) being electrically connected to a live line (L);

A heating driving module (112) electrically connected to the second terminal (1202) of the heat generating tray (120) and electrically connected to a neutral line (N);

A dry burning detection module (114) electrically connected with the second terminal (1202) of the heating plate (120); and

the controller (110) is electrically connected with the heating driving module (112) and the dry burning detection module (114) and controls the on-off of the heating driving module (112); when the heating driving module (112) is conducted, the second terminal (1202) of the heating plate (120) is connected to a zero line through the heating driving module (112) for heating; when the heating driving module (112) is disconnected, the controller (110) is connected to a live wire through the dry burning detection module (114) and the heating plate (120), detects a signal of the dry burning detection module (114), and judges whether dry burning is performed or not.

2. The food processor heating circuit according to claim 1, wherein the dry-fire detection module (114) comprises a zero-crossing detection circuit, the zero-crossing detection circuit detects a zero-crossing point of the alternating current to generate a zero-crossing signal, and the controller (110) detects whether the heating driving module (112) is in a dry-fire state according to whether the zero-crossing signal exists or not when the heating driving module is turned off.

3. The food processor heating circuit of claim 2, wherein the zero-crossing detection circuit comprises a first diode (D11) and a second diode (D12), wherein an anode of the first diode (D11) is connected to a cathode of the second diode (D12), and a cathode of the first diode (D11) is grounded; the anode of the second diode (D12) is connected with a direct current power supply (VCC2),

the ZERO-crossing detection circuit comprises a ZERO-crossing signal output port (ZERO) led out from the positive electrode of the first diode (D11), and the controller (110) is connected with the dry burning detection module (114) through the ZERO-crossing signal output port (ZERO).

4. The food processor heating circuit of claim 3, wherein the zero crossing detection circuit further comprises a resistor connected between the second terminal (1202) and the positive electrode of the first diode (D11).

5. The food processor heating circuit according to claim 1, wherein the heating driving module (112) comprises a switch (K1), the second terminal (1202) is connected with the heating driving module (112) through the switch (K1), and the switch (K1) comprises a relay.

6. The food processor heating circuit according to claim 5, wherein the heating driving module (112) comprises a heating control signal input port (RLY) and a transistor (Q1), wherein a base of the transistor (Q1) is connected to the heating control signal input port (RLY), a collector of the transistor is connected to the DC power supply (VCC1) after being connected to the switch (K1), and an emitter of the transistor is grounded.

7. The food processor heating circuit according to claim 6, wherein a resistor is connected between the heating control signal input port (RLY) and the transistor (Q1).

8. the food processor heating circuit of claim 7, wherein the resistor comprises a resistor R31, a resistor R32, and a resistor R33,

The resistor R31 and the resistor R33 are connected in series between the heating control signal input port (RLY) and the base of the triode (Q1), and the resistor R32 and the resistor R33 are connected in series between the heating control signal input port (RLY) and the emitter of the triode (Q1).

9. The food processor heating circuit according to claim 1, wherein the heat generating plate (120) comprises a heat generating body (1204) and a temperature controller (1206) connected in series between the first terminal (1200) and the second terminal (1202).

10. a food processor comprising the food processor heating circuit of any one of claims 1-9.