CN207301686U - Cooking apparatus and its telecommunication circuit - Google Patents

Abstract

The utility model discloses a kind of cooking apparatus and its telecommunication circuit, the cooking apparatus includes the first controller and second controller, and the operating voltage of the first controller is different from the operating voltage of second controller, and the telecommunication circuit includes：Switch element, is connected between the first communication ends of the first controller and the first communication ends of second controller；Pull-up unit, is connected with the first default power supply and switch element respectively, and pull-up unit to switch element providing supply voltage；Partial pressure unit, is connected between the second communication ends of the first controller and the second communication ends of second controller, and communication voltage conversion is carried out by telecommunication circuit between the first controller and second controller, realizes communication.Thus, without being the communication that can be achieved between different operating voltage chips by special voltage matches conversion circuit or conversion chip, and cost is low, and circuit is reliable.

Description

Cooking apparatus and its telecommunication circuit

Technical field

Field of communication technology is the utility model is related to, the telecommunication circuit and one kind of more particularly to a kind of cooking apparatus have The cooking apparatus of the telecommunication circuit.

Background technology

In actual circuit application process, often have and communicate between multiple microcontrollers, but different microcontrollers, Its operating voltage may be different, for example, the operating voltage of some microcontrollers is 5V, and some is 3.3V etc..When two monolithics When the operating voltage of machine is different, cannot directly it communicate between the two, it is therefore desirable to use voltage matches conversion circuit Or voltage conversion chip carries out voltage conversion.

Utility model content

The utility model is intended to solve one of technical problem in above-mentioned technology at least to a certain extent.For this reason, this reality It is to propose a kind of telecommunication circuit of cooking apparatus with first new purpose, without changing electricity by special voltage matches Road or conversion chip are the communication that can be achieved between different operating voltage chips, and cost is low, and circuit is reliable.

Second purpose of the utility model is to propose a kind of cooking apparatus.

To reach above-mentioned purpose, the utility model first aspect proposes a kind of telecommunication circuit of cooking apparatus, described to cook Utensil of preparing food includes the first controller and second controller, the operating voltage of first controller and the work of the second controller Make voltage difference, the telecommunication circuit is connected between first controller and the second controller, the telecommunication circuit Including：Switch element, the switch element are connected to the first communication ends of first controller and the second controller Between first communication ends；Pull-up unit, the pull-up unit is connected with the first default power supply and the switch element respectively, described Pull-up unit to the switch element provide supply voltage；Partial pressure unit, the partial pressure unit are connected to first control Between second communication ends of device processed and the second communication ends of the second controller；Wherein, first controller and described the Communication voltage conversion is carried out by the telecommunication circuit between two controllers, to realize communication.

The telecommunication circuit of cooking apparatus according to the present utility model, switch element is connected to the first controller first are led to To believe between end and the first communication ends of second controller, pull-up unit is connected with the first default power supply and switch element respectively, with To switch element provide supply voltage, partial pressure unit be connected to the first controller the second communication ends and second controller second Between communication ends, when being communicated, communication voltage conversion is carried out by the telecommunication circuit, to realize communication, therefore without logical Cross the communication between the i.e. achievable different operating voltage chips of special voltage matches conversion circuit or conversion chip, and cost Low, circuit is reliable.

In addition, according to the utility model proposes the telecommunication circuit of cooking apparatus can also have the technology additional as follows special Sign：

Specifically, the supply voltage that the pull-up unit provides is identical with the operating voltage of first controller.

Specifically, the pull-up unit includes first resistor and second resistance, one end of the first resistor and described the One end of two resistance is connected to the described first default power supply after being connected, the other end of the first resistor is controlled with described first respectively First communication ends of device processed are connected with the first end of the switch element, the other end of the second resistance and the switch element Second end be connected.

Specifically, the switch element includes：First triode, base stage and the second resistance of first triode The other end be connected, the collector of first triode is connected with the first communication ends of the second controller, described first The emitter of triode is connected with the other end of the first resistor and the first communication ends of first controller respectively；First Diode, the anode of first diode are connected with the emitter of first triode, the cathode of first diode It is connected with the collector of first triode.

Specifically, the partial pressure unit includes 3rd resistor and the 4th resistance, one end of the 3rd resistor and described the One end of four resistance is connected and has first node, and the first node is connected with the second communication ends of first controller, The other end ground connection of the 3rd resistor, the other end of the 4th resistance and the second communication ends phase of the second controller Even.

Further, the telecommunication circuit of the cooking apparatus, further includes the 5th resistance, and one end of the 5th resistance connects The second default power supply is connect, the other end of the 5th resistance is connected with the first communication ends of the second controller, wherein, it is described The voltage of second default power supply is identical with the operating voltage of the second controller.

Further, the telecommunication circuit of the cooking apparatus, further includes the first capacitance and the second capacitance, first electricity One end of appearance is connected with the first communication ends of the second controller, one end of second capacitance and first controller Second communication ends are connected, and the other end of first capacitance is grounded after being connected with the other end of second capacitance.

Specifically, the operating voltage of first controller is 3.3V, and the operating voltage of the second controller is 5V.

To reach above-mentioned purpose, the utility model second aspect proposes a kind of cooking apparatus, it includes above-mentioned communication Circuit.

The cooking apparatus of the utility model, by above-mentioned telecommunication circuit, without changing electricity by special voltage matches Road or conversion chip are the communication that can be achieved between different operating voltage chips, and cost is low, and circuit is reliable.

In addition, according to the utility model proposes cooking apparatus can also have technical characteristic additional as follows：

Specifically, the cooking apparatus is Split cooking apparatus.

Brief description of the drawings

Fig. 1 is the structure diagram according to the telecommunication circuit of the cooking apparatus of the utility model one embodiment；

Fig. 2 is the structure diagram according to the telecommunication circuit of the cooking apparatus of the utility model another embodiment.

Embodiment

The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is same or like element.Below by ginseng The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model Limitation.

Describe the telecommunication circuit of the cooking apparatus of the utility model embodiment below in conjunction with the accompanying drawings and there is the communication The cooking apparatus of circuit.

Fig. 1 is the structure diagram according to the telecommunication circuit of the cooking apparatus of the utility model one embodiment.

In the embodiment of the utility model, cooking apparatus may include the first controller 10 and second controller 20, first The operating voltage of controller 10 is different from the operating voltage of second controller 20, for example, the operating voltage of the first controller 10 is 3.3V, the operating voltage of second controller 20 are 5V, telecommunication circuit 30 be connected to the first controller 10 and second controller 20 it Between, communication voltage conversion is carried out by telecommunication circuit 30 between the first controller 10 and second controller 20, to realize communication.

As shown in Figure 1, telecommunication circuit 30 may include：Switch element 31, pull-up unit 32 and partial pressure unit 33, wherein, open Unit 31 is closed to be connected between the first communication ends SDA1 of the first controller 10 and the first communication ends SDA2 of second controller 20； Pull-up unit 32 is connected with the first default power vd D1 and switch element 31 respectively, and pull-up unit 32 to switch element 31 carrying For supply voltage；Partial pressure unit 33 is connected to the second communication ends SCL1 of the first controller 10 and leads to the second of second controller 20 Between letter end SCL2.Wherein, the supply voltage that pull-up unit 32 provides is identical with the operating voltage of the first controller 10, such as 3.3V。

Specifically, as shown in Figure 1, pull-up unit 32 may include first resistor R1 and second resistance R2, first resistor R1's One end is connected to the other end of the first default power vd D1, first resistor R1 respectively with the after being connected with one end of second resistance R2 First communication ends SDA1 of one controller 10 is connected with the first end of switch element 31, and the other end and switch of second resistance R2 is single The second end of member 31 is connected.

Switch element 31 may include：First triode Q1 and the first diode D1, the base stage and second of the first triode Q1 The other end of resistance R2 is connected, and the collector of the first triode Q1 is connected with the first communication ends SDA2 of second controller 20, the The emitter of one triode Q1 is connected with the other end of first resistor R1 and the first communication ends SDA1 of the first controller 10 respectively； The anode of first diode D1 is connected with the emitter of the first triode Q1, the cathode of the first diode D1 and the first triode Q1 Collector be connected.

Partial pressure unit 33 may include 3rd resistor R3 and the 4th resistance R4, and one end of 3rd resistor R3 is with the 4th resistance R4's One end is connected and there is first node J1, first node J1 to be connected with the second communication ends SCL1 of the first controller 10, the 3rd electricity The other end ground connection GND of R3 is hindered, the other end of the 4th resistance R4 is connected with the second communication ends SCL2 of second controller 20.

Further, as shown in Figure 1, the telecommunication circuit of above-mentioned cooking apparatus may also include the 5th resistance R5, the 5th electricity Hinder the second default power vd D2 of one end connection of R5, the other end of the 5th resistance R5 and the first communication ends of second controller 20 SDA2 is connected, wherein, the voltage of the second default power vd D2 is identical with the operating voltage of second controller 20, such as 5V.

Specifically, as shown in Figure 1, when the second communication ends SCL2 of second controller 20 connects 5V high voltages, in partial pressure Under the partial pressure effect of unit 33, by the voltage of acquisition 3.4V, (actual voltage value is by 3rd resistor R3 and the 4th at first node J1 The resistance value of resistance R4 determines), the second communication ends SCL1 of the first controller 10 will input the high level signal of 3.4V at this time, meet The communication voltage requirement of first controller 10；When the second communication ends SCL2 ground connection of second controller 20, the first controller 10 The second communication ends SCL1 by input low level signal.

When the high level signal of the first communication ends SDA2 outputs 5V of second controller 20, the first triode Q1 is disconnected, The voltage of first communication ends SDA1 of the first controller 10 is pulled to 3.3V by first resistor R1, and the first of the first controller 10 is logical Believe the high level signal of end SDA1 inputs 3.3V, meet the communication voltage requirement of the first controller 10；When second controller 20 When first communication ends SDA2 exports low level signal, the first triode Q1 is disconnected, and the first diode D1 is turned on, at this time the first control First communication ends SDA1 input low level signals of device 10 processed.

In turn, when the high level signal of the first communication ends SDA1 outputs 3.3V of the first controller 10, the one or three pole Pipe Q1 is disconnected, while the first diode Q1 ends, the pull-up of the first communication ends SDA2 of second controller 20 in the 5th resistance R5 Under effect, 5V high level signals are pulled to, the first communication ends SDA2 input 5V high level signals of second controller 20, full at this time The communication voltage requirement of sufficient second controller 20；When the first communication ends SDA1 of the first controller 10 exports low level signal, First triode Q1 is turned on, the first communication ends SDA2 input low level signals of second controller 20.

Thus, it can be achieved that communication between different operating voltage chips, without using special voltage matches conversion circuit Or conversion chip, cost is low, and circuit is simple, reliable.For example, the telecommunication circuit of the utility model embodiment can be applied to I2C (Inter Integrated Circuit, twin wire universal serial bus), UART (Universal Asynchronous Receiver/Transmitter, universal asynchronous receiving-transmitting transmitter) etc. communication mode, it is and reasonable by being carried out to resistance Set, cannot be only used for communication of the operating voltage between 5V and the chip of 3.3V, can be also used for other different operating voltages Communication between chip.In addition, main control end (is easier out using open-drain output when there is engaged line from end during high speed communication It is existing) when, the state from end may determine that by the telecommunication circuit, so that communication mistake is effectively avoided the occurrence of, it is standard compliant IIC communicates.

In addition, in the embodiment of the utility model, can also be added accordingly in telecommunication circuit 30 according to being actually needed Filter circuit 34, with reference to figure 2, which may include the first capacitance C1 and the second capacitance C2, the one of the first capacitance C1 End is connected with the first communication ends SDA2 of second controller 20, and one end of the second capacitance C2 communicates with the second of the first controller 10 End SCL1 is connected, and the other end of the first capacitance C1 is grounded GND after being connected with the other end of the second capacitance C2, to be filtered to signal Ripple processing.

According to the telecommunication circuit of the cooking apparatus of the utility model embodiment, switch element is connected to the first controller Between first communication ends and the first communication ends of second controller, pull-up unit presets power supply and switch element phase with first respectively Even, supply voltage is provided to switch element, partial pressure unit is connected to second communication ends and second controller of the first controller Between second communication ends, when being communicated, by the telecommunication circuit carry out communication voltage conversion, with realize communication, thus without Need to be the communication that can be achieved between different operating voltage chips by special voltage matches conversion circuit or conversion chip, and Cost is low, and circuit is reliable.

In addition, the embodiment of the utility model also proposed a kind of cooking apparatus, it includes the logical of above-mentioned cooking apparatus Believe circuit.Wherein, cooking apparatus can be Split cooking apparatus, for example, Split type electric rice cooker, split-type electric pressure cooker etc.. Certainly, the embodiment telecommunication circuit of the utility model can be not only used in cooking apparatus, can be also used in other equipment, tool Body is not limited here.

The cooking apparatus of the utility model embodiment, by above-mentioned telecommunication circuit, without passing through special voltage matches Conversion circuit or conversion chip are the communication that can be achieved between different operating voltage chips, and cost is low, and circuit is reliable.

In the description of the utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", The orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " are based on shown in the drawings Orientation or position relationship, are for only for ease of description the utility model and simplify description, rather than indicate or imply signified dress Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model Limitation.

In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include one or more this feature.In the description of the utility model, " multiple " are meant that two or two More than, unless otherwise specifically defined.

In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be Mechanically connect or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be two The interaction relationship of connection or two elements inside element.For the ordinary skill in the art, can basis Concrete condition understands concrete meaning of the above-mentioned term in the utility model.

In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature Can be that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special Sign second feature " on ", " top " and " above " can be fisrt feature directly over second feature or oblique upper, or only Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term State and be necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with Combine in an appropriate manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this area Technical staff can by the different embodiments or example described in this specification and different embodiments or exemplary feature into Row combines and combination.

Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is Exemplary, it is impossible to the limitation to the utility model is interpreted as, those of ordinary skill in the art are in the scope of the utility model It is interior above-described embodiment to be changed, changed, replaced and modification.

Claims (10)

1. a kind of telecommunication circuit of cooking apparatus, it is characterised in that the cooking apparatus includes the first controller and the second control Device, the operating voltage of first controller is different from the operating voltage of the second controller, and the telecommunication circuit is connected to Between first controller and the second controller, the telecommunication circuit includes：

Switch element, the switch element are connected to the of the first communication ends of first controller and the second controller Between one communication ends；

Pull-up unit, the pull-up unit are connected with the first default power supply and the switch element respectively, and the pull-up unit is used To provide supply voltage to the switch element；

Partial pressure unit, the partial pressure unit are connected to the of the second communication ends of first controller and the second controller Between two communication ends；

Wherein, communication voltage conversion is carried out by the telecommunication circuit between first controller and the second controller, To realize communication.

2. the telecommunication circuit of cooking apparatus as claimed in claim 1, it is characterised in that the power supply electricity that the pull-up unit provides Pressure is identical with the operating voltage of first controller.

3. the telecommunication circuit of cooking apparatus as claimed in claim 1 or 2, it is characterised in that the pull-up unit includes first Resistance and second resistance, one end of the first resistor is connected to described first after being connected with one end of the second resistance default Power supply, the other end of the first resistor respectively with the first communication ends of first controller and the switch element first End is connected, and the other end of the second resistance is connected with the second end of the switch element.

4. the telecommunication circuit of cooking apparatus as claimed in claim 3, it is characterised in that the switch element includes：

First triode, the base stage of first triode are connected with the other end of the second resistance, first triode Collector be connected with the first communication ends of the second controller, the emitter of first triode is respectively with described first The other end of resistance is connected with the first communication ends of first controller；

First diode, the anode of first diode are connected with the emitter of first triode, the one or two pole The cathode of pipe is connected with the collector of first triode.

5. the telecommunication circuit of cooking apparatus as claimed in claim 3, it is characterised in that the partial pressure unit includes 3rd resistor With the 4th resistance, one end of the 3rd resistor is connected with one end of the 4th resistance and has a first node, and described first Node is connected with the second communication ends of first controller, the other end ground connection of the 3rd resistor, the 4th resistance The other end is connected with the second communication ends of the second controller.

6. the telecommunication circuit of cooking apparatus as claimed in claim 3, it is characterised in that further include the 5th resistance, the described 5th The second default power supply of one end connection of resistance, the other end of the 5th resistance and the first communication ends phase of the second controller Even, wherein, the voltage of the described second default power supply is identical with the operating voltage of the second controller.

7. the telecommunication circuit of cooking apparatus as claimed in claim 3, it is characterised in that further include the first capacitance and the second electricity Hold, one end of first capacitance is connected with the first communication ends of the second controller, one end of second capacitance and institute The second communication ends for stating the first controller are connected, after the other end of first capacitance is connected with the other end of second capacitance Ground connection.

8. the telecommunication circuit of cooking apparatus as claimed in claim 1, it is characterised in that the operating voltage of first controller For 3.3V, the operating voltage of the second controller is 5V.

A kind of 9. cooking apparatus, it is characterised in that the communication electricity including the cooking apparatus as any one of claim 1-8 Road.

10. cooking apparatus as claimed in claim 9, it is characterised in that the cooking apparatus is Split cooking apparatus.