CN216752173U - Multi-functional module multiplexing circuit and cooking utensil - Google Patents

Abstract

The application discloses a multiplexing circuit of a plurality of functional modules and culinary art device, this circuit includes: the system comprises a control module, a function locking module and at least two function modules; the control module comprises an MCU (microprogrammed control unit) and a plurality of I/O (input/output) ports, at least two functional modules are connected with the control module through a functional locking module, the I/O ports can be set to be in different states, and the functional modules corresponding to the states of the common port can be locked by the functional locking module to be in an available state and other modules can be locked at the same time in the different states of the I/O. By the scheme of the embodiment, the same I/O port is multiplexed in a time-sharing mode, a plurality of functional modules are driven by fewer I/O ports, and I/O port resources are saved.

Description

Multi-functional module multiplexing circuit and cooking utensil

Technical Field

The utility model relates to a household electrical appliances field, concretely relates to a plurality of function module multiplexing circuit and cooking utensil.

Background

At present, most products need human-computer interaction functions, and the products usually include a plurality of functional modules, such as keys, LED lamps, nixie tubes, and the like. For these functional modules, the more complex the functional module is and the more controller driver ports are required, as the more interaction logic is required.

Currently, each function module is controlled by generally adopting an MCU, usually, one function module is controlled by an I/O port of one MCU, when the function modules are too many, the resources of the input/output port of the chip are insufficient, more MCUs are needed to increase the I/O ports, and the problem of insufficient ports is solved.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems described in the background art, a first objective of the present application is to provide a multiplexing circuit for multiple functional modules, which realizes that fewer I/O ports can drive multiple functional modules simultaneously.

Another object of the present application is to provide a cooking appliance.

In order to achieve the first object, the present application adopts the following technical solutions:

the plurality of functional block multiplexing circuits includes: the system comprises a control module, a function locking module and at least two function modules; the control module comprises a public port and a driving port, the public port is connected with the control end of the function locking module, one end of at least one function module is connected with an auxiliary power supply or ground through the function locking module, the other end of the function module is connected with the driving port, and the function locking module can be used for conducting connection between the function module and the auxiliary power supply or the ground in a time sharing mode.

Furthermore, the function module comprises an output function module, the function locking module comprises at least one pair of single-level interlocking controllable switch sets, each controllable switch in the controllable switch sets is connected with the output function module in a one-to-one correspondence manner, and control ends of the controllable switches are respectively connected with the public port.

Furthermore, the output type function module comprises a first output type function module and a second output type function module, and each output type function module is provided with an anode and a cathode; each pair of controllable switch groups comprises a first controllable switch and a second controllable switch; one end of the first controllable switch is connected with an auxiliary power supply, and the other end of the first controllable switch is connected with the anode of the first output type functional module and is grounded through a first resistor; one end of the second controllable switch is connected with the cathode of the second output type functional module and is connected with the auxiliary power supply through a second resistor, and the other end of the second controllable switch is grounded; and the cathode of the first output type functional module and the anode of the second output type functional module are connected with the driving port.

Further, the function module further comprises an input type function module; the input type functional module is arranged between the driving port and the ground, and a third resistor is further connected in series between the input type functional module and the ground.

Further, the driving port is provided with a pull-up resistor input end, wherein the resistance of the pull-up resistor is greater than the resistance of the third resistor.

Further, the function module comprises an input function module and an output function module; the function locking module comprises a third controllable switch, the third controllable switch is connected with the output type function module, and the control end of the third controllable switch is connected with the common port; the input type functional module is arranged between the driving port and the ground, and a third resistor is further connected in series between the input type functional module and the ground.

Further, the controllable switch group comprises: and the control end of the NPN triode and the PNP triode are connected with the common port, or the control end of the N-channel MOS transistor and the control end of the P-channel MOS transistor are connected with the common port.

Further, the first output-type functional module comprises a common anode LED array, and the second output-type functional module comprises a common cathode LED array.

Further, the input type function module includes a key input part.

In order to achieve the other purpose, the following technical scheme is adopted in the application:

a cooking appliance comprising a plurality of functional module multiplexing circuits as described in any one of the above.

According to the scheme, the public port is connected with the function locking module and at least part of the function modules, the public port can be set to be in different states in a time-sharing mode, and the function locking module can lock the function modules corresponding to the states of the public port to be in available states when the public port is in different states; the driving ports are respectively connected with the functional modules and are effective to the functional modules in a usable state. The I/O port of the same MCU can be simultaneously connected with a plurality of functional modules, the effect of interlocking a plurality of modules by single level is realized through the controllable switch group, the multiplexing of the I/O port is realized, each functional module can be controlled in a time-sharing manner, the use of I/O is reduced, and the problem of insufficient I/O is solved.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a schematic diagram of a functional module multiplexing circuit module provided by the present invention;

fig. 2 is a schematic diagram of another functional module multiplexing circuit module provided by the present invention;

fig. 3 is a schematic diagram of another functional module multiplexing circuit module provided by the present invention;

fig. 4 is a schematic diagram of a functional module multiplexing circuit provided by the present invention;

fig. 5 is a schematic diagram of an equivalent circuit provided by the present invention;

fig. 6 is another schematic diagram of an equivalent circuit provided by the present invention.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings, wherein the same reference numerals in the drawings denote the same components or similar components. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present invention.

In a specific embodiment, a multiple function block multiplexing circuit, see fig. 1, may include: a control module 1, a function locking module 2 and at least two function modules 3. The control module comprises a public port 11 and a driving port 12, the public port 11 is connected with the control end of the function locking module, at least one end of the function module 3 is connected with an auxiliary power supply or ground through the function locking module 2, the other end of the function module is connected with the driving port 12, and the function locking module 2 can be conducted with the auxiliary power supply or the ground in a time sharing mode. The common port 11 can be set to different states in a time-sharing manner, and when the common port 11 is in different states, the functional locking module can lock the functional module corresponding to the state of the common port 11 to be in an available state; the drive ports 12 are connected to the functional modules, respectively, and are effective for the functional modules in the available state. As an exemplary embodiment, the common port 11 and the driving port 12 are I/O ports of a control module, wherein the common port 11 may be a port providing a stable level, and therefore, the common port 11 may be set to different states, which may include, for example, a state of outputting a high level, a state of outputting a low level, and a state of high impedance. The driving port 12 may be a port for outputting a driving signal or a scan signal, or may be a signal input port, and when the common port 11 is set to different states, different functional modules may be enabled or disabled by setting the driving port 12 to different states.

The function locking module may enable different states of the common port 11 to act on different function modules when the common port is in different states, for example, the common port 11 may be set to output a high level state or output a low level state, when the common port 11 outputs a high level state, the high level triggers the function locking module to provide a stable level for the function module corresponding to the high level state, or when the common port 11 outputs a low level state, the low level triggers the function locking module to provide a stable level for the function module corresponding to the low level state. Or when the common port 11 is set to a high impedance state, the functional module corresponding to the high impedance state trigger functional locking module can trigger the driving port 12 alone. And the common port 11 is in a different state, the other functional modules are in an unavailable state, for example, the other functional modules are disconnected from the common port 11, or the actions of the other functional modules do not affect the input of the driving port 12. That is, no matter what state is set at the driving port 12, no other functional module can be driven or signals input by other functional modules can not be received.

Therefore, by setting the state of the common port 11 in a time-sharing manner, different functional modules sharing the drive port 12 and the common port 11 can be enabled in a time-sharing manner, so that a plurality of functional modules can multiplex the I/O port, and the problems of I/O port resource shortage and port shortage are solved.

As an exemplary embodiment, the function locking module includes at least one pair of single-level interlocking controllable switch sets 21, wherein each controllable switch in the controllable switch sets 21 is connected to the output-type function module in a one-to-one correspondence, and control ends of the controllable switches are respectively connected to the common port 11.

Illustratively, referring to fig. 2, the common port 11 may be set to an output state and an input state. In a state where the common port 11 is set to the output state, the function module connected to the function locking module may include the output-type function module 31. The output function module 31 may be a function module that outputs a signal, for example, a function module that outputs information, such as an alarm module and a display module. In the present embodiment, the output type functional module 31 supplies a stable level through the common port 11 to make the output type functional module 31 in a usable state, and the supply of the scan signal through the driving port 12 is effective for the functional module in the usable state.

Specifically, the common port 11 can output a high level and a low level in a time-sharing manner, only one level can be output at each time, and the control end of each controllable switch in the single-level interlocking controllable switch group 21 is connected with the common port 11, and at one level, one controllable switch is turned on, and the other controllable switch is turned off, so that single-level interlocking is realized. In the state that the common port 11 outputs one level, only the functional module corresponding to the current level is in the available state, and other functional modules are in the unavailable state, and the functional module in the available state is driven in cooperation with the scanning timing sequence of the driving port 12. Therefore, the common port 11 is set to be in different states in a time sharing mode, different functional modules are in available states in a time sharing mode, the common port 11 and the driving port 12 can be shared by the functional modules, and the problems of shortage of I/O port resources and insufficient ports are solved.

As an exemplary embodiment, when the common port 11 is set to the output state, a high level and a low level can be output in time division, and two signals are output correspondingly, each signal can control the action of one output type functional module, so that the output type functional module includes a first output type functional module 311 and a second output type functional module 312. Referring to fig. 3, the first output type functional module 311 and the second output type functional module 312 have a common cathode and a common anode, the common cathode of the first output type functional module 311 and the common anode of the second output type functional module 312 are respectively connected to the controllable switch sets 21, and each pair of the single-level interlocking controllable switch sets 21 includes: a first controllable switch 211 and a second controllable switch 212. The function locking module further comprises an auxiliary power supply, a first resistor and a second resistor, one end of the first controllable switch 211 is connected with the auxiliary power supply, and the other end is connected with the anode of the first output type function module 311 and is grounded through the first resistor; one end of the second controllable switch 212 is connected to the cathode of the second output-type functional module 312, and is connected to the auxiliary power supply through a second resistor, and the other end is grounded; the cathode of the first output type function block 311 and the anode of the second output type function block 312 are connected to the drive port 12. When the output signal of the common port 11 is at a high level, the first controllable switch 211 is turned off to control the first output-type functional module 311 to be locked, and the second controllable switch 212 is turned on to control the second output-type functional module 312 to be available; when the output signal of the common port 11 is at a low level, the first controllable switch 211 is turned on to control the first output-type functional module 311 to be available, and the second controllable switch 212 is turned off to control the second output-type functional module 312 to be locked. The controllable switch group 21 realizes the available states of the first output type functional module 311 and the second output type functional module 312 in the single level control circuit through the difference of the polarities of the functional modules.

As an alternative embodiment, the common port 11 may also be set to a high impedance state, when the common port 11 is set to the high impedance state, the common port 11 does not output a signal, the controllable switch group 21 is all turned off, the first output-type functional module 311 and the second output-type functional module 312 are both in an unavailable state, and the driving port 12 may be a port for inputting a signal. Therefore, the functional module may be an input type functional module that inputs a signal to the drive port 12, and the input type functional module may be a circuit with a key switch. Specifically, the driving port 12 has a pull-up resistor input end, the voltage of the driving port 12 is a high level, one end of the key switch is connected to the driving port 12, the other end of the key switch is connected to another component in the circuit with the key switch, and the other component may be a third resistor. The third resistor is a current limiting resistor, and the resistance value of the third resistor is far smaller than that of the pull-up resistor. When the key switch is turned off, the driving port 12 is configured as a pull-up resistor input due to the pull-up resistor, and receives a high-level signal; when the key switch is closed, the drive port 12 receives a signal close to a low level with the key switch turned on.

As an alternative embodiment, the common port 11 may be set to an output state and a high impedance state, the output-type functional module 31 receives an output signal in the output state of the common port 11, the output-type functional module performs a corresponding action after receiving the output signal, when the common port 11 is set to the high impedance state, the output-type functional module 31 is disconnected from the circuit, the driving port 12 receives a signal with a pull-up resistor, the input-type functional module may be a circuit with a key switch, and include a key switch and a third resistor, the key switch controls the input-type functional module to switch in and switch out, and outputs a level signal to the driving port 12, because of the presence of the third resistor, in the output state of the common port 11, the level of the driving port 12 does not change with the input-type functional module switching in and switching out. The output type function module is connected with the public port 11 through the function locking module, the function locking module can be a third controllable switch, the other end of the output type function module and the input type function module are connected with the driving port 12 together, the other end of the output type function module is connected with the ground through a third resistor, the corresponding function modules are enabled through different states of the public port 11, and multiplexing of the public port 11 and the driving port 12 by the output type function module and the input type function module is achieved.

In an exemplary embodiment of the present invention, the first output function module is exemplified by an LDE circuit, the second output function module is exemplified by a nixie tube circuit, the first controllable switch 211 and the second controllable switch 212 are exemplified by an NPN triode and a PNP triode or an N-channel MOS and a P-channel MOS, in this embodiment, the first controllable switch 211 and the second controllable switch 212 are exemplified by a PNP triode and an NPN triode, referring to fig. 4, the circuit includes a control module, an LED circuit, a nixie tube circuit, and a key circuit, the LED circuit is exemplified by a common anode LED array, the two-bit nixie tube circuit is exemplified by a common cathode LED array, the interlocking effect of the common anode LED and the common cathode LED is realized by the controllable switch group 21, each I/O port of the control module in the circuit is connected to an equivalent circuit of at least one of the LED circuit, the nixie tube circuit, and the key circuit, the multiplexing of I/O ports is realized.

Referring to the equivalent circuit diagrams shown in fig. 5 and 6, the PNP transistor Q2 represents the PNP transistor group, the NPN transistor Q1 represents the NPN transistor group, the nixie tube circuit represents the LED diode LED1, and the LED circuit represents the LED diode LED 2. The base electrode of the PNP type triode is connected with the public port 11, the collector electrode of the PNP type triode is connected with the anode of the LED circuit and is connected with the ground through the first resistor, and the emitter electrode of the PNP type triode is connected with the auxiliary power supply; the base electrode of the NPN type triode is connected with the public port 11, the emitting electrode of the NPN type triode is connected with the cathode of the two-bit nixie tube circuit and is connected with the auxiliary power supply through a second resistor, and the collecting electrode of the NPN type triode is grounded. The cathode of the LED circuit and the anode of the two-bit nixie tube are connected to the driving port 12. When the public port 11 is set to be in an output state, the high level enables the LED circuit to be conducted, and the two-digit nixie tube circuit is disconnected; the low level makes the LED circuit disconnection, and two nixie tube circuit switch on, have realized the effect of homopotential interlocking.

In the embodiment, a group of interlocking controllable switch group 21 is formed by a PNP triode and an NPN triode together, the PNP triode is connected with a common anode LED circuit equivalent circuit, and the NPN triode is connected with a common cathode LED equivalent circuit, so that the control module scans the scanning nixie tube circuit and the scanning LED circuit in a time-sharing manner through the interlocking controllable switch group 21. The time-sharing time is shortened to be within the duration time which can be distinguished by human eyes, so that the LED and the digital tube can be scanned simultaneously, the display effect is continuous lighting, and the human-computer interaction function is realized. When the plurality of functional modules are output functional modules, the state of the output module is controlled by a single level through the interlocked controllable switch group.

In a specific embodiment, the condition that the corresponding circuits are controlled by different potentials may be time-sharing scanning, and when the common port 11 is set to be in an output state and the output is at a high level, the two-bit nixie tube circuit is correspondingly scanned. Referring to fig. 5, a base of a PNP transistor Q1 is connected to a common port 11, a collector of a PNP transistor Q1 is connected to an auxiliary power supply and a cathode of a light emitting diode LED1, an emitter of the PNP transistor Q1 is grounded, a base of an NPN transistor Q2 is connected to the common port 11, a collector of the NPN transistor Q2 is grounded via a first resistor and is simultaneously connected to an anode of the light emitting diode LED2, and a cathode of the light emitting diode LED2 and an anode of the light emitting diode LED1 are commonly connected to a driving port 12. When the common port 11 is set to be at a high level, corresponding to the time sequence of the scanning nixie tube, the NPN triode Q2 is turned off, the anode of the light emitting diode LED2 is at a low level, and the cathode is at a high level, so that the light emitting diode LED2 is not turned on; the PNP transistor Q1 is turned on, and the cathode of the LED1 is at a low level and the anode thereof is at a high level, so that the LED1 is turned on. In conclusion, the function locking module composed of the triodes controls the two-digit nixie tube circuit to be conducted to be in a usable state when the two-digit nixie tube circuit is scanned, and simultaneously locks the scanning LED circuit.

More specifically, when the common port 11 is set to the output state and the output is at the low level, the LED circuit is scanned correspondingly. For example, referring to fig. 5, when the common port 11 is set to low level, corresponding to the scan LED timing, the PNP transistor Q1 is turned off, the anode of the LED1 is low level, and the cathode is high level, so that the LED1 is not turned on; the NPN transistor Q2 is turned on, and the cathode of the LED2 is at a low level and the anode thereof is at a high level, so that the LED2 is turned on. In conclusion, the function locking module composed of the triodes controls the two-digit nixie tube circuit to be in an available state when the two-digit nixie tube circuit is scanned, and simultaneously locks the scanning LED circuit. The circuit includes an input type functional module, and this embodiment takes a circuit with a key switch as an example, the first key switch K1 of the output type functional module is connected to ground through a resistor R1, and the other end is connected to the driving port 12, because of the existence of the resistor R1, when the common port 11 is set to the output state, no matter whether the first key switch K1 is turned on, the voltage at the driving port 12 is not affected.

In a specific embodiment, as shown in fig. 6, the plurality of functional modules further includes an input-type functional module, and the equivalent circuit includes: referring to fig. 5, as a more specific embodiment, an equivalent circuit of an output type functional module is connected to a common port 11 through a pair of interlock switches, an output type functional module equivalent circuit is connected to a corresponding output type functional module through a pair of interlock switches, one end of a second key switch K2 and a pull-up resistor R2 are connected to a driving port 12 together, a pull-up resistor R2 is connected to an auxiliary power supply, a fixed high level is input, and the other end of the second key switch 389k 5 is connected to ground through a current limiting resistor R3. Because of the current-limiting resistor R3, the voltage of the driving port 12 is the original output voltage no matter whether the second key switch K2 is pressed down and turned on, when the common port 11 is set to a high-resistance state, the driving port 12 connected to the control module is configured as a pull-up resistor input, and because the common port 11 is floating, the PNP transistor Q1 and the NPN transistor Q2 are turned off, the cathode of the light emitting diode LED1 is positive, and the light emitting diode LED1 is not lighted no matter what level the anode is; the anode of the diode light emitting LED2 is negative, and no matter what level the cathode is, the light emitting diode LED2 is not lighted; since the drive port 12 is provided with the pull-up resistor R2 for the key, the drive port 12 is at a high level when the second key switch K2 is not present, and the drive port 12 is at a nearly low level when the second key switch K2 is pressed. While the selection of the value of the current limiting resistor R3 is much smaller than the pull-up resistor R2.

The application also provides a cooking appliance, which comprises a body and a plurality of functional modules arranged on the body, wherein the functional modules are controlled by the multiplexing circuit of the functional modules in the embodiment, and the functional modules can comprise prompting devices, such as LED lamps or LED arrays; may include a display device, such as a nixie tube; signal input means may also be included. Such as on-off keys, knob keys, etc.

In the present embodiment, the cooking appliance may include a rice cooker, an electric pressure cooker, an air fryer, an induction cooker, and the like having a plurality of functional modules.

So far, the technical solutions of the present disclosure have been described in connection with the foregoing embodiments, but it is easily understood by those skilled in the art that the scope of the present disclosure is not limited to only these specific embodiments. The technical solutions in the above embodiments can be split and combined, and equivalent changes or substitutions can be made on related technical features by those skilled in the art without departing from the technical principles of the present disclosure, and any changes, equivalents, improvements, and the like made within the technical concept and/or technical principles of the present disclosure will fall within the protection scope of the present disclosure.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above are only examples of the present invention, and are not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A multiple function module multiplexing circuit, comprising:

the system comprises a control module, a function locking module and at least two function modules; the control module comprises a public port and a driving port, the public port is connected with the control end of the function locking module, one end of at least one function module is connected with an auxiliary power supply or ground through the function locking module, the other end of the function module is connected with the driving port, and the function locking module can conduct connection between the function module and the auxiliary power supply or the ground in a time sharing mode.

2. The multiple function module multiplexing circuit according to claim 1 wherein the function modules comprise output-type function modules and the function locking module comprises at least one pair of single-level interlocked controllable switch groups, wherein each controllable switch in the controllable switch groups is connected to the output-type function modules in a one-to-one correspondence, and control terminals of the controllable switches are connected to the common ports, respectively.

3. The plurality of functional module multiplexing circuits of claim 2 wherein said output mode functional modules comprise a first output mode functional module and a second output mode functional module, each having an anode and a cathode; each pair of single-level interlocking controllable switch groups comprises a first controllable switch and a second controllable switch;

one end of the first controllable switch is connected with the auxiliary power supply, and the other end of the first controllable switch is connected with the anode of the first output type functional module and is grounded through a first resistor;

one end of the second controllable switch is connected with the cathode of the second output type functional module and is connected with the auxiliary power supply through a second resistor, and the other end of the second controllable switch is grounded; and the cathode of the first output type functional module and the anode of the second output type functional module are connected with the driving port.

4. The plurality of functional module multiplexing circuits of claim 1 wherein said functional modules further comprise an input-type functional module;

the input type functional module is arranged between the driving port and the ground, and a third resistor is further connected in series between the input type functional module and the ground.

5. The multiple function module multiplexing circuit of claim 4, wherein the drive port is configured with a pull-up resistor input, wherein the pull-up resistor has a resistance value greater than the third resistor.

6. The plurality of functional module multiplexing circuits of claim 1 wherein said functional modules comprise an input type functional module and an output type functional module;

the function locking module comprises a third controllable switch, the third controllable switch is connected with the output type function module, and the control end of the third controllable switch is connected with the common port;

the input type functional module is arranged between the driving port and the ground, and a third resistor is further connected in series between the input type functional module and the ground.

7. The multiple function module multiplexing circuit of claim 2 wherein said single level interlock controllable switch bank comprises: and the control end of the NPN triode and the PNP triode are connected with the common port, or the control end of the N-channel MOS transistor and the control end of the P-channel MOS transistor are connected with the common port.

8. The multiple function module multiplexing circuit of claim 3 wherein said first output mode function module comprises a common anode LED array and said second output mode function module comprises a common cathode LED array.

9. The multiple function module multiplexing circuit of claim 4 wherein the input type function module comprises a key input section.

10. A cooking appliance comprising a plurality of functional module multiplexing circuits according to any of claims 1-9.

Images