CN112806842B - Pressure cooking utensil with split-type connected upper cover and cooking control method thereof - Google Patents
Pressure cooking utensil with split-type connected upper cover and cooking control method thereof Download PDFInfo
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- CN112806842B CN112806842B CN201911130444.6A CN201911130444A CN112806842B CN 112806842 B CN112806842 B CN 112806842B CN 201911130444 A CN201911130444 A CN 201911130444A CN 112806842 B CN112806842 B CN 112806842B
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
- A47J27/0802—Control mechanisms for pressure-cookers
Abstract
The application discloses a pressure cooking appliance with an upper cover in split connection and a cooking control method thereof, wherein the input end of a control chip is connected with a temperature measuring element, the output end of the control chip is connected with the control end of a switch device, and the output end of the switch device is connected with a coupling connector; the temperature measuring element collects an analog signal reflecting the temperature in the cooking cavity of the pot body, the analog signal is input to the input end of the control chip, the control chip converts the analog signal into a digital signal which is used as a temperature measuring signal, the digital signal is coded and is output from the output end of the control chip so as to control the on-off state of the switch device; the on-off state of the switch device controls the change of the bus voltage of the coupling connector, and the temperature measuring signal is transmitted to the receiving module through the change of the bus voltage. According to the temperature measurement device, the digital temperature measurement signals are transmitted through the coupling connector, the temperature can be accurately measured, and the temperature measurement result is used for accurately controlling the pressure.
Description
Technical Field
The application relates to the technical field of cooking control, in particular to a pressure cooking appliance with an upper cover in split connection and a cooking control method thereof.
Background
At present, electric pressure cookers in the market are all provided with upper cover structures, and for a part of electric pressure cookers, the upper cover and a cooker body are connected in a split mode.
For the electric pressure cooker of split type connection, use pressure switch control pressure, be equipped with pressure switch at its pot body bottom, pressure switch and dish spring, generate heat dish and inner bag and constitute the pressure-bearing structure, when having pressure in the pot, the inner bag pressurized can warp slightly downwards, promote the dish that generates heat and move down to make dish spring produce elastic deformation, dish spring and pressure switch ejector pin contact, when reaching certain pressure, the ejector pin is flicked pressure switch, and pressure switch and the dish series connection that generates heat, thereby the disconnection heating, reach the purpose of control pressure.
However, in practical applications, the pressure switch may be aged and deformed with the use of the electric pressure cooker, and thus it is difficult to accurately control the pressure.
Disclosure of Invention
The embodiment of the application provides a pressure cooking appliance with a split type connected cover, a cooking control method thereof and a corresponding computer readable storage medium, which are used for solving the following technical problems in the prior art: for the split type connected electric pressure cooker, the pressure switch can be aged and deformed along with the use of the electric pressure cooker, so that the pressure is difficult to accurately control.
The embodiment of the application adopts the following technical scheme:
a pressure cooking appliance with an upper cover in split connection comprises an upper cover, a temperature measuring module, a coupling connector, a pot body and a receiving module, wherein the temperature measuring module comprises a control chip, a temperature measuring element and a switch device;
the input end of the control chip is connected with the temperature measuring element, the output end of the control chip is connected with the control end of the switch device, and the output end of the switch device is connected with the coupling connector;
the temperature measuring element collects an analog signal reflecting the temperature in the cooking cavity of the pot body and inputs the analog signal into the input end of the control chip, the control chip converts the analog signal into a digital signal which is used as a temperature measuring signal, the digital signal is coded and output from the output end of the control chip so as to control the on-off state of the switch device;
the on-off state of the switch device controls the change of the bus voltage of the coupling connector, and the temperature measuring signal is transmitted to the receiving module through the change of the bus voltage.
Optionally, the high level output by the output end of the control chip controls the switching device to be in an on state, so that the bus voltage of the coupling connector is pulled down;
and the low level output by the output end of the control chip controls the switching device to be in an off state, so that the bus voltage of the coupling connector is pulled high.
Optionally, the switching device has a control terminal, a ground terminal, and an output terminal;
the output end of the control chip is connected with the control end, the grounding end is connected with the ground, and the output end of the switch device is connected with the bus of the coupling connector.
Optionally, the receiving module includes a comparison circuit, and an input terminal of the comparison circuit is connected to the bus of the coupling connector;
the bus voltage of the coupling connector is input into the comparison circuit and is compared with a preset reference voltage, the output voltage of the comparison circuit is pulled up or pulled down according to the comparison result, and the receiving module receives the temperature measurement signal through the corresponding change of the output voltage of the comparison circuit.
Optionally, three types of sub-signals, namely, a start signal, a binary digit 1 and a binary digit 0, and a division signal between the sub-signals are represented by the change of the bus voltage.
Optionally, the partitioning signal is represented by consecutive low levels of the bus voltage for a first predetermined duration, a binary digit 1 is represented by consecutive high levels of the bus voltage for a second predetermined duration, and a binary digit 0 is represented by consecutive high levels of the bus voltage for a third predetermined duration; alternatively, the first and second liquid crystal display panels may be,
the split signal is represented by successive low levels of the bus voltage for a first predetermined duration, a binary digit 1 is represented by a first predetermined number of pulses of the bus voltage, and a binary digit 0 is represented by a second predetermined number of pulses of the bus voltage.
A cooking control method of a pressure cooking appliance with a detachable upper cover, wherein the upper cover is connected with a pot body through a coupling connector, and the method comprises the following steps:
collecting an analog signal reflecting the temperature in the cooking cavity, converting the analog signal into a digital signal, and coding the digital signal for controlling the on-off state of a switch device;
controlling the change of the bus voltage of the coupling connector through the on-off state of the switching device;
and measuring the temperature in the cooking cavity through the change of the bus voltage.
Optionally, measuring the temperature in the cooking cavity by changing the bus voltage includes:
inputting the bus voltage into a comparison circuit, and comparing the bus voltage with a preset reference voltage;
and according to the comparison result, the output voltage of the comparison circuit is pulled up or pulled down, and the temperature measurement in the cooking cavity is realized through the corresponding change of the output voltage of the comparison circuit.
Optionally, three types of sub-signals, namely, a start signal, a binary digit 1 and a binary digit 0, and a division signal between the sub-signals are represented by the change of the bus voltage.
Optionally, the division signal is represented by consecutive low levels of the bus voltage for a first predetermined duration, the start signal is represented by consecutive high levels of the bus voltage for a second predetermined duration, a binary digit 1 is represented by consecutive high levels of the bus voltage for a third predetermined duration, and a binary digit 0 is represented by consecutive high levels of the bus voltage for a fourth predetermined duration; alternatively, the first and second electrodes may be,
the division signal is represented by successive low levels of the bus voltage for a first predetermined duration, the start signal is represented by successive high levels of the bus voltage for a second predetermined duration, a binary digit 1 is represented by a first predetermined number of pulses of the bus voltage, and a binary digit 0 is represented by a second predetermined number of pulses of the bus voltage.
A computer-readable storage medium, which stores a computer program that, when executed by a processor, implements the cooking control method of the above-described pressure cooking appliance with a split-type connection of the upper cover.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects: the digital temperature measurement signals are transmitted through the coupling connector, so that the temperature can be accurately measured, and the temperature measurement result is used for accurately controlling the pressure; moreover, whether the temperature measurement signal can be normally received or not can be further used for accurately judging the cover closing state of the pressure cooking appliance connected with the upper cover in a split mode.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic view of a partial structure of a pressure cooking appliance with a detachable top cover according to some embodiments of the present application;
fig. 2 is a schematic flow chart of a cooking control method of a pressure cooking appliance according to some embodiments of the present application;
FIG. 3 is a schematic diagram illustrating the operation of a thermometry module according to some embodiments of the present disclosure;
FIG. 4 is a schematic diagram of a circuit configuration involved in a thermometry module according to some embodiments of the present application;
FIG. 5 is a schematic diagram of another circuit configuration involved in a thermometry module according to some embodiments of the present application;
FIG. 6 is a schematic diagram of waveforms involved in a communication protocol provided in some embodiments of the present application;
FIG. 7 is a schematic diagram of another waveform involved in a communication protocol provided by some embodiments of the present application;
in the figure, 1 an upper cover, 2 a temperature measuring module, 3 a coupling connector, 31 an upper coupling piece, 32 a lower coupling piece, 4 a pot body and 41 a cooking cavity.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
To the pressure cooking utensil of split type connection, this application does not use pressure switch control pressure, but sets up temperature measurement module in upper cover department, carries out coupled connection through coupling connector and pot body, realizes accurate temperature measurement, and then accurately accuse temperature accuse pressure according to the temperature measurement result.
Fig. 1 is a schematic diagram of a partial structure of a pressure cooking appliance with a detachable top cover, according to some embodiments of the present application, and the following embodiments are described with reference to the pressure cooking appliance in fig. 1 as an example.
The pressure cooking utensil in figure 1 includes upper cover 1, temperature measurement module 2, coupling connector 3, the pot body 4, coupling connector 3 is including setting up in upper cover 1's last coupling piece 31, set up in pot body 4's lower coupling piece 32, pot body 4 includes cooking chamber 41, in addition, pot body 4 still includes receiving module, parts such as heating module, is inside pot body 4, the part concrete structure of temperature measurement module 2 is inside upper cover 1, not shown one by one, the conciseness, the reference numeral of part is omitted below, directly call with the part name.
The upper cover and the pot body are in coupling connection through the coupling connector, and in the state that the coupling connection is connected, electric signals (such as temperature measurement signals) can be transmitted between the upper cover and the pot body through the coupling connection, and in the state that the coupling connection is disconnected, the transmission of the electric signals is also disconnected. The temperature measurement module is arranged on the upper cover and used for detecting the temperature in the cooking cavity of the pot body to generate a corresponding temperature measurement signal, the temperature measurement signal is transmitted to the receiving module through coupling connection, and the receiving module receives and uses the temperature measurement signal to trigger execution of control actions such as follow-up temperature control, pressure control and the like.
More specifically, the temperature measuring module comprises a control chip, a temperature measuring element and a switch device. The input end of the control chip is connected with the temperature measuring element, the output end of the control chip is connected with the control end of the switch device, and the output end of the switch device is connected with the coupling connector; the temperature measuring element collects an analog signal reflecting the temperature in the cooking cavity of the pot body, the analog signal is input to the input end of the control chip, the control chip converts the analog signal into a digital signal which is used as a temperature measuring signal, the digital signal is coded and is output from the output end of the control chip so as to control the on-off state of the switch device; the on-off state of the switch device controls the change of the bus voltage of the coupling connector, and the temperature measuring signal is transmitted to the receiving module through the change of the bus voltage.
Based on the pressure cooking utensil of figure 1, transmit digital temperature measurement signal through the coupling connector, can accurately measure the temperature, and the temperature measurement result is used for accurately controlling pressure.
It should be noted that, the functional division of the modules in the structure of fig. 1 is exemplary, and these functions may be integrated on the same module, or the functions may be further subdivided and implemented on more modules respectively. Based on this, some embodiments of the present application further provide a flow chart of a cooking control method of the pressure cooking appliance, as shown in fig. 2, and the definition of specific execution modules of partial steps is reduced in fig. 2.
The process of fig. 2 includes at least the following steps:
s200: the method comprises the steps of collecting an analog signal reflecting the temperature in a cooking cavity, converting the analog signal into a digital signal, and coding the digital signal for controlling the on-off state of a switch device.
S202: the change of the bus voltage of the coupling connector is controlled by the on-off state of the switch device.
S204: and measuring the temperature in the cooking cavity through the change of the bus voltage.
The commonly used temperature measuring element is a resistance temperature measuring element, the resistance temperature measuring element has a characteristic of correspondingly presenting different resistance values at different temperatures, and an analog signal (generally, a voltage signal) reflecting the resistance value is directly detected by using the characteristic to realize the purpose of temperature detection. However, in the solution of the present application, the upper cover and the cooker body are in coupling connection, a contact resistance is generated at the coupling connection, and if the analog signal is directly transmitted through the coupling connection, the contact resistance changes the amplitude of the analog voltage signal, so that an inaccurate temperature measurement result is obtained. Based on this, this application has carried out analog-to-digital conversion with analog signal, and then transmits through the coupling connection to avoided contact resistance to influence the accuracy of temperature measurement signal.
The switching device is, for example, a Metal Oxide Semiconductor (MOS) transistor, a triode, or the like.
In some embodiments of the application, when the upper cover is closed in place, the coupling connector is connected, and the receiving module can normally receive the temperature measurement signal, whereas when the upper cover is not closed in place, the coupling connector is disconnected, and the receiving module cannot receive the temperature measurement signal. Therefore, the receiving module can successfully receive the temperature measurement signal to judge whether the upper cover is in place or not, and the cover-in-place detection mode is simple, convenient and reliable and has low cost.
More intuitively, some embodiments of the present application provide a schematic diagram of a working principle of a temperature measurement module, which can implement the above temperature measurement process, as shown in fig. 3.
In fig. 3, the temperature measuring element is matched with the conversion circuit, and an analog signal is acquired and sent to the control chip for processing; the control chip converts the analog signal into a digital signal through the analog-to-digital converter, and then codes the digital signal through the coder based on a preset communication protocol, wherein the purpose of coding is to ensure the stability and accuracy of the digital signal in the transmission process and improve the anti-interference capability, and the coded digital signal is sent to the receiving module through the sending unit of the control chip; the middle is transmitted through the coupling connection established by the coupling connector; the receiving module correspondingly decodes the received signals through a decoder to restore digital signals, and the digital signals are analyzed to obtain temperature, so that the temperature measuring process is completed.
The change in bus voltage includes pulling up to a specified level, pulling down to a specified level, and holding at the specified level for a specified duration. The designated levels include high and low levels, and are further divided into multiple levels if more states need to be represented.
The change of the bus voltage needs to be controlled by a corresponding circuit, and some embodiments of the application provide a schematic circuit structure diagram related to the temperature measurement module, as shown in fig. 4.
In the circuit of fig. 4, the left-hand box represents the thermometric module and the right-hand box represents the receiving module. RT1 is a thermistor as a temperature measuring element, Q1 is an MOS tube as a switching element, R1 and R2 are resistors, C1 is a capacitor, D1 is a diode, CON1 is a coupling connector, BUS is a BUS of CON1, U1 is a control chip and shows four ports a 1-a 4, the port a1 is used for supplying power to U1, the port a2 is used for grounding, the port a3 is used for receiving an input signal for analog-to-digital conversion, and the port a4 is used for outputting a coded signal.
One end of the R1 is connected with the ground, and the other end of the R1 is respectively connected with one end of the RT1 and the port a 3; the other end of the RT1 is respectively connected with the port a1, one end of the C1 and the negative electrode of the D1; the other end of the C1 is connected with the port a2 and the ground respectively; the positive electrode of the D1 is respectively connected with the output ends of the BUS and the Q1; the control end of the Q1 is connected with the port a 4; the grounding end of the Q1 and the grounding wire of the CON1 are grounded together; one end of the R2 is connected to the power supply, and the other end is connected to the bus of the CON1, which is used as the receiving end of the receiving module.
The operating principle of the circuit of fig. 4 comprises: the BUS charges the C1 through the D1, the C1 is discharged after being fully charged, power is provided for the U1, a filtering effect is achieved, the D1 plays a role in isolation from the BUS in the discharging process of the C1, and stable communication of the BUS is guaranteed; when a stable power supply is supplied to U1, U1 is powered on to start working, meanwhile, the power supply is also used as a power supply of a conversion circuit, RT1 divides the measured different resistance values through R1 to obtain different analog voltage values (as the analog signals), the analog voltage values are input to an a3 port and converted into digital signals, and the digital signals are encoded in U1 through a preset communication protocol and then are output from an a4 port.
The signal output by the a4 port drives the Q1 to be switched on or switched off. Specifically, the output high level controls the Q1 to be in a turn-on state, so that the BUS voltage is pulled low; and the output low level controls the Q1 to be in a turn-off state, so that the BUS voltage is pulled high. The receiving end of the receiving module can receive the temperature measuring signal through the change of the BUS voltage.
Of course, the circuits capable of implementing the temperature measurement scheme of the present application are various and are not limited to the circuit in fig. 4, for example, some embodiments of the present application further provide a schematic diagram of a circuit structure related to the temperature measurement module, as shown in fig. 5, the temperature measurement scheme of the present application can also be implemented.
In the circuit of fig. 5, the upper left block represents a temperature measuring module, and the right and lower blocks represent receiving modules, some of which have the same structure as that of fig. 5, and only different structures will be described. R3, R4 and R5 are resistors, COM1 is a comparator, and a U2 voltage stabilizer is used for stabilizing the power supply voltage for U1.
The grounding end of U2 is connected with the port a2 together, the input end (IN) of U2 is connected with one ends of BUS and R3 respectively, the output end (OUT) of U2 is connected with the other ends of the port a1 and RT1 respectively, and the output end of Q1 is connected with BUS through R3; the other end of the R2 is respectively connected with the input ends of the signals to be compared of the BUS and the COM 1; a preset reference voltage value is input into a reference signal input end of the COM1, and an output end of the COM1 is connected with one end of the R4 and one end of the R5 respectively; the other end of the R4 is respectively connected with a power supply and a power supply end of the COM 1; the other end of R5 is used as the receiving end of the receiving module.
The operating principle of the circuit of fig. 5 comprises: when Q1 is switched on or switched off, the BUS voltage can output different voltages, and when Q1 is switched off, the BUS voltage is the same as the power supply voltage; when Q1 is switched on, R2 is communicated with the ground, and the BUS voltage is equal to the partial voltage of R2 and R3 to the power supply; and then the BUS voltage is input into the COM1 and compared with the reference voltage, when the COM1 generates an overturning signal and the receiving terminal is pulled down when the COM voltage is higher than the reference voltage, different signals are generated at the receiving terminal, and therefore the temperature measuring signal is received.
The circuit of fig. 5 has some additional advantages over the circuit of fig. 4. In the circuit of fig. 5, R3 is added, since R3 can divide the voltage, the BUS voltage will not be pulled to zero even if Q1 is on, so the BUS voltage will always exist as long as the power supply is normal. Based on this, in the circuit of fig. 5, the encoded digital signals are compared through COM1 and then decoded, so as to prevent erroneous judgment of the BUS voltage level and improve decoding reliability; moreover, the upper limit of the voltage allowed by the BUS can be increased, so that the power supply voltage can be set higher, the energy supply is increased, more loads can be arranged on the upper cover, and the loads can be a display interface, a motor, a vacuum pump and the like; in addition, the on time of Q1 can be allowed to be longer because the BUS is not powered down, thereby not causing U1 to be powered down due to the BUS voltage pulling low, or due to the supply capacitance (e.g., C1 in FIG. 4) discharging too long.
In practice, in the circuit of figure 4 the BUS voltage does not exceed 5V, whereas in the circuit of figure 5 the BUS voltage can be increased to above 18V, contributing to a more reliable voltage communication.
Further, some embodiments of the present application also provide two communication protocols for accurately transmitting the thermometric signal, in which the three sub-signals, i.e. the start signal, the binary number 1, and the binary number 0, and the division signal between the sub-signals are represented by the change of the bus voltage. Fig. 6 and 7 show waveforms related to the two communication protocols, respectively.
In the communication protocol employed in fig. 6, the split signal is represented by consecutive low levels of the bus voltage for a first predetermined period of time, the start signal is represented by consecutive high levels of the bus voltage for a second predetermined period of time, the binary digit 1 is represented by consecutive high levels of the bus voltage for a third predetermined period of time, and the binary digit 0 is represented by consecutive high levels of the bus voltage for a fourth predetermined period of time.
Specifically, in the waveform of fig. 6, the first predetermined period is denoted as T0, the second predetermined period is denoted as T1, the third predetermined period is denoted as T2, and the fourth predetermined period is denoted as T3.
After the pressure cooking appliance is powered on, the BUS is pulled down for a time length of T0, and communication is started:
and (3) increasing the BUS voltage, starting timing, when the timing time reaches T1, decreasing the BUS voltage for T0 continuously, stopping timing, and taking a signal in T1 as an initial signal.
And (3) raising the BUS voltage, starting timing, when the timing time reaches T2, lowering the BUS voltage and continuing to T0, stopping timing, and taking a signal in T2 as a binary digit 1.
And (3) increasing the BUS voltage, starting timing, when the timing time reaches T3, decreasing the BUS voltage for T0 continuously, stopping timing, and taking a signal in T3 as a binary digit 0.
It should be noted that T0 is not set too long because: if T0 is too long, the voltage provided to U1 after C1 has discharged for a period of time is too low, which may cause U1 to reset.
The coding format of the communication protocol used in fig. 6 is, for example: sum of start signal + all data (for verification) + data 1+ data 2+ · + data n; wherein, the data 1-n are service data. Assuming that decimal data 1 needs to be sent, the decimal data is converted into an 8-bit binary digital signal of 00000001, after the start signal is sent, the first high-bit binary digital 0 is sent, the pulse length is T3, after the first pulse is sent, the BUS voltage is pulled down for keeping T0, the second binary digital 0 is sent, and so on, until the last binary digital 1 is sent, and the last pulse length is T2.
In the communication protocol employed in fig. 7, the split signal is represented by successive low levels of the bus voltage for a first predetermined period of time, the start signal is represented by successive high levels of the bus voltage for a second predetermined period of time, the binary digit 1 is represented by a first predetermined number of pulses of the bus voltage, and the binary digit 0 is represented by a second predetermined number of pulses of the bus voltage.
Specifically to the waveforms in fig. 7, the first predetermined period of time is denoted as T0 and the second predetermined period of time is denoted as T1.
When the pressure cooking appliance is powered on, the communication is started:
and (3) raising the BUS voltage, starting timing, when the timing time reaches T1, lowering the BUS voltage and continuing to T0, stopping timing, and taking a signal in T1 as an initial signal.
Sending a first pulse: and (3) raising the BUS voltage, starting timing, when the timing time reaches T2, lowering the BUS voltage for keeping T0, stopping timing, and taking a signal in T2 as a first pulse.
In the same manner, the next pulse is started again.
The coding format of the communication protocol used in fig. 7 is, for example: start signal + number of pulses specified (for verification) + one datum. The number of assigned pulses differs for binary digits 1 and 0, respectively.
Based on the same idea, some embodiments of the present application further provide a computer-readable storage medium, where the storage medium stores a computer program, and the computer program is executed by a processor to implement the above cooking control method for a pressure cooking appliance with a split-type top cover connection.
The embodiments in the present application are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or apparatus comprising the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (9)
1. A pressure cooking appliance with an upper cover in split connection is characterized by comprising an upper cover, a temperature measuring module, a coupling connector, a pot body and a receiving module, wherein the temperature measuring module comprises a control chip, a temperature measuring element, a switching device and a power supply for supplying power to the control chip;
the input end of the control chip is connected with the temperature measuring element, the output end of the control chip is connected with the control end of the switch device, and the output end of the switch device is connected with the coupling connector;
the temperature measuring element collects an analog signal reflecting the temperature in the cooking cavity of the pot body and inputs the analog signal into the input end of the control chip, the control chip converts the analog signal into a digital signal which is used as a temperature measuring signal, the digital signal is coded and output from the output end of the control chip so as to control the on-off state of the switch device;
the switch device is provided with a control end, a grounding end and an output end; the output end of the control chip is connected with the control end, the grounding end is connected with the ground, the output end of the switch device is connected with the bus of the coupling connector through a resistor, the input end of the power supply is respectively connected with the bus and one end of the resistor, the on-off state of the switch device controls the change of the bus voltage of the coupling connector, and the temperature measuring signal is transmitted to the receiving module through the change of the bus voltage.
2. The pressure cooking appliance of claim 1, wherein the high level output from the output terminal of the control chip controls the switch device to be in the on state, so that the bus voltage of the coupling connector is pulled down;
and the low level output by the output end of the control chip controls the switching device to be in an off state, so that the bus voltage of the coupling connector is pulled high.
3. The lid split connection pressure cooking appliance of claim 1, wherein the receiving module includes a comparison circuit, an input of the comparison circuit is connected to the bus of the coupling connector;
the bus voltage of the coupling connector is input into the comparison circuit and is compared with a preset reference voltage, the output voltage of the comparison circuit is pulled up or pulled down according to the comparison result, and the receiving module receives the temperature measurement signal through the corresponding change of the output voltage of the comparison circuit.
4. The pressure cooking appliance of claim 1, wherein the three sub-signals of binary number 1 and binary number 0 and the division signal between the sub-signals are represented by the variation of the bus voltage.
5. The pressure cooking appliance of claim 4, wherein said divided signal is represented by a continuous low level of said bus voltage for a first predetermined period of time, a binary number 1 is represented by a continuous high level of said bus voltage for a second predetermined period of time, and a binary number 0 is represented by a continuous high level of said bus voltage for a third predetermined period of time; alternatively, the first and second electrodes may be,
the split signal is represented by successive low levels of the bus voltage for a first predetermined duration, a binary digit 1 is represented by a first predetermined number of pulses of the bus voltage, and a binary digit 0 is represented by a second predetermined number of pulses of the bus voltage.
6. A cooking control method of a pressure cooking appliance with a detachable upper cover, which is characterized in that the method is realized by the pressure cooking appliance according to any one of claims 1-5, wherein the upper cover is connected with a pot body through a coupling connector, and the method comprises the following steps:
collecting an analog signal reflecting the temperature in the cooking cavity, converting the analog signal into a digital signal, and coding the digital signal for controlling the on-off state of a switch device;
controlling the change of the bus voltage of the coupling connector through the on-off state of the switching device;
and measuring the temperature in the cooking cavity through the change of the bus voltage.
7. The cooking control method of the pressure cooking appliance with the split-type upper cover connection as claimed in claim 6, wherein the measuring of the temperature in the cooking cavity is realized by the change of the bus voltage, and comprises the following steps:
inputting the bus voltage into a comparison circuit, and comparing the bus voltage with a preset reference voltage;
and according to the comparison result, the output voltage of the comparison circuit is pulled up or pulled down, and the temperature measurement in the cooking cavity is realized through the corresponding change of the output voltage of the comparison circuit.
8. The cooking control method of the pressure cooking appliance of claim 6, wherein three sub-signals of a start signal, a binary number 1, a binary number 0, and a division signal between the sub-signals are represented by a change of the bus voltage.
9. The cooking control method of the cover split type connected pressure cooking appliance according to claim 8, wherein the division signal is represented by consecutive low levels of the bus voltage for a first predetermined period of time, the start signal is represented by consecutive high levels of the bus voltage for a second predetermined period of time, a binary digit 1 is represented by consecutive high levels of the bus voltage for a third predetermined period of time, and a binary digit 0 is represented by consecutive high levels of the bus voltage for a fourth predetermined period of time; alternatively, the first and second liquid crystal display panels may be,
the division signal is represented by successive low levels of the bus voltage for a first predetermined period of time, the start signal is represented by successive high levels of the bus voltage for a second predetermined period of time, a binary digit 1 is represented by a first predetermined number of pulses of the bus voltage, and a binary digit 0 is represented by a second predetermined number of pulses of the bus voltage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911130444.6A CN112806842B (en) | 2019-11-18 | 2019-11-18 | Pressure cooking utensil with split-type connected upper cover and cooking control method thereof |
Applications Claiming Priority (1)
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