CN211236636U - Self-checking control circuit and cooking utensil - Google Patents
Self-checking control circuit and cooking utensil Download PDFInfo
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- CN211236636U CN211236636U CN201922502032.2U CN201922502032U CN211236636U CN 211236636 U CN211236636 U CN 211236636U CN 201922502032 U CN201922502032 U CN 201922502032U CN 211236636 U CN211236636 U CN 211236636U
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- 238000010411 cooking Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims description 18
- 238000004891 communication Methods 0.000 claims description 14
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 8
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
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- 230000002159 abnormal effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model discloses a self-checking control circuit and cooking utensil. Wherein, this self-checking control circuit includes: the circuit comprises a control chip, a resistor set, a control switch and a load, wherein an input/output port of the control chip is connected with one end of the control switch through a first resistor in the resistor set, a detection port of the control chip is connected with one end of the control switch in parallel through a second resistor in the resistor set and the first resistor, and the other end of the control switch is connected with the load and used for outputting a signal for controlling the load through the detection port under the condition that the input/output port fails; the first resistance is greater than the second resistance. The utility model provides a singlechip port trouble can't carry out the technical problem of effective control to the circuit.
Description
Technical Field
The utility model relates to a household electrical appliances field particularly, relates to a self-checking control circuit and cooking utensil.
Background
The control driving circuit is a type of circuit commonly used in home appliances, and is used to provide a driving signal and/or a control signal to a load element or a switching element in the home appliance, thereby implementing various functions of the home appliance.
However, if a port of the control chip in the conventional control driving circuit fails, the control chip cannot further control the load element or the switch element in the control circuit, and thus the household appliance cannot be normally used.
Aiming at the problem that the port fault of the single chip microcomputer cannot effectively control the circuit, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a self-checking control circuit and cooking utensil to solve singlechip port trouble at least and can't carry out the technical problem of effective control to the circuit.
According to the utility model discloses an aspect of the embodiment provides a self-checking control circuit, include: the circuit comprises a control chip, a resistor set, a control switch and a load, wherein an input/output port of the control chip is connected with one end of the control switch through a first resistor in the resistor set, a detection port of the control chip is connected with one end of the control switch in parallel through a second resistor in the resistor set and the first resistor, and the other end of the control switch is connected with the load and used for outputting a signal for controlling the load through the detection port under the condition that the input/output port fails; the first resistance is greater than the second resistance; so that under the condition that the input/output port is in fault, the control chip can still output a signal for controlling the load through the detection port, and the problem that the cooking appliance cannot be used is avoided.
Optionally, the first end of the control switch is connected in series with the first resistor through a third resistor in the resistor set, and the third resistor is connected in parallel with the second resistor; the second end of the control switch is grounded, and the third end of the control switch is connected with the load; the third resistor is a protection resistor, and the control switch is protected from voltage overload.
Further, optionally, the control switch comprises: the base electrode of the triode is connected with the first resistor in series through a third resistor, and the third resistor is connected with the second resistor in parallel; the fourth resistor in the resistor set is grounded with the emitter of the triode, the fourth resistor and the third resistor are connected in parallel to the first resistor and the second resistor, and the collector of the triode is connected with the load.
Optionally, the control switch includes: the first end of the controllable silicon is connected with the first resistor in series through a third resistor, the third resistor is connected with the second resistor in parallel, the second end of the controllable silicon is grounded, and the third end of the controllable silicon is connected with a load.
Optionally, the load includes: the power supply comprises a relay and a diode, wherein one end of the relay and one end of the diode are connected in parallel to a power supply, and the other end of the relay and the other end of the diode are connected in parallel to be connected with the other end of the control switch.
Optionally, the self-checking control circuit further includes: the alarm device is connected with the control chip and used for giving an alarm prompt under the condition that the input/output port is in fault; so that the user can timely know the operating state of the cooking appliance.
Further, optionally, the alarm device includes: the prompting module is connected with the control chip and used for performing alarm prompting in an acousto-optic and electric mode under the condition that the input/output port is in fault; so that the user can timely know the operating state of the cooking appliance.
Optionally, the warning device includes: the communication module is connected with the control chip and used for sending fault information to the user terminal and/or the after-sales server under the condition that the input/output port is in fault; so that the user and the manufacturer can timely know the operating state of the cooking appliance.
Further, optionally, the alarm device includes: the prompting module and the communication module are respectively connected with the control chip and used for giving an alarm in an acousto-optic form under the condition that the input/output port is in fault, and the communication module sends fault information to the user terminal and/or the after-sale server; so that the user and the manufacturer can timely know the operating state of the cooking appliance.
Optionally, the first resistor (141) and the second resistor (142) satisfy a preset condition, where the preset condition includes: r102 > 10 XR 104; or (R102 multiplied by 5V)/(R104+ R102) is greater than the voltage Vh which the control chip (12) judges as high level; (R104 × 5V)/(R104+ R102) is smaller than the voltage Vl which the control chip (12) judges as low level; wherein, R102 is represented by a first resistor (141), R104 is represented by a second resistor (142), and 5V is the output voltage of the control chip (12).
According to an aspect of the embodiments of the present invention, there is provided a cooking appliance, including: the self-checking control circuit comprises the self-checking control circuit.
Optionally, the cooking appliance comprises: an electric pressure cooker.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is a schematic diagram of a self-test control circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a self-test control circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of another self-test control circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another self-test control circuit according to an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Example 1
According to the utility model discloses according to the embodiment provides an embodiment of self-checking control circuit, and fig. 1 is according to the utility model discloses a self-checking control circuit's schematic diagram, as shown in fig. 1, this self-checking control circuit includes:
the circuit comprises a control chip 12, a resistor set 14, a control switch 16 and a load 18, wherein an input/output port of the control chip 12 is connected with one end of the control switch 16 through a first resistor 141 in the resistor set 14, a detection port of the control chip 12 is connected with the first resistor 141 through a second resistor 142 in the resistor set 14 in parallel to one end of the control switch 16, and the other end of the control switch 16 is connected with the load 18 and is used for outputting a signal for controlling the load 18 through the detection port in the case of a fault of the input/output port; the first resistor 141 is larger than the second resistor 142; so that the control chip 12 can still output the signal for controlling the load 18 through the detection port in case of the failure of the input/output port, thereby avoiding the problem that the cooking appliance cannot be used.
Specifically, fig. 2 is a schematic diagram of a self-checking control circuit according to an embodiment of the present invention, as shown in fig. 2, a first resistor 141 in a resistor set 14 in the self-checking control circuit provided in the embodiment of the present application is marked as R102, a second resistor 142 is marked as R104, an input/output port is marked as a Relay port, and a detection port is marked as a check port;
the control chip 12 in the embodiment of the present application may be a module chip with computational control capability, for example, a single chip Microcomputer (MCU), or a micro controller Unit (MCU for short).
Optionally, the first resistor (141) and the second resistor (142) satisfy a preset condition, where the preset condition includes: r102 > 10 XR 104; or (R102 multiplied by 5V)/(R104+ R102) is greater than the voltage Vh which the control chip (12) judges as high level; (R104 × 5V)/(R104+ R102) is smaller than the voltage Vl which the control chip (12) judges as low level; wherein, R102 is represented by a first resistor (141), R104 is represented by a second resistor (142), and 5V is the output voltage of the control chip (12).
In order to realize port multiplexing, that is, in the case of a failure of the input/output port, a signal for controlling the load 18 is output through the detection port, the following relationship exists between the first resistor 141 and the second resistor 142:
r102 > 10 × R104, i.e., R102 has a much larger resistance value than R104;
or the like, or, alternatively,
the (R102 multiplied by 5V)/(R104+ R102) is larger than the voltage Vh judged to be high by the single chip microcomputer, and the (R104 multiplied by 5V)/(R104+ R102) is smaller than the voltage Vl judged to be low by the single chip microcomputer, wherein 5V is the output voltage of the single chip microcomputer.
Optionally, the first end of the control switch 16 is connected in series with the first resistor 141 through a third resistor 143 in the resistor set 14, and the third resistor 143 is connected in parallel with the second resistor 142; a second end of the control switch 16 is grounded, and a third end of the control switch 16 is connected with a load 18; the third resistor 143 is a protection resistor, and protects the control switch 16 from voltage overload.
Specifically, as shown in fig. 2, the third resistor 143 is labeled as R101, and the third resistor 143 is a protection resistor for protecting the control switch 16 from voltage overload.
Further, optionally, the control switch 16 includes: the base of the triode is connected with the first resistor 141 in series through the third resistor 143, and the third resistor 143 is connected with the second resistor 142 in parallel; the fourth resistor 144 of the resistor set 14 is grounded to the emitter of the transistor, the fourth resistor 144 and the third resistor 143 are coupled in parallel to the first resistor 141 and the second resistor 142, and the collector of the transistor is connected to the load 18.
Specifically, fig. 3 is a schematic diagram of another self-checking control circuit according to the embodiment of the present invention, as shown in fig. 3, the transistor is labeled as Q1, the third resistor 143 is labeled as R101, and the fourth resistor 144 is labeled as R103, where the specification of R101 is 2k Ω, and the specification of R103 is 10k Ω, it should be noted that the specifications of the third resistor 143 and the fourth resistor 144 in this embodiment of the present invention are only described by taking the above as an example, so as to implement the self-checking control circuit provided in this embodiment of the present invention, and the specification is not limited specifically.
Optionally, the control switch 16 includes: and a first end of the thyristor is connected in series with the first resistor 141 through a third resistor 143, the third resistor 143 is connected in parallel with the second resistor 142, a second end of the thyristor is grounded, and a third end of the thyristor is connected with the load 18.
Specifically, fig. 4 is a schematic diagram of another self-checking control circuit according to an embodiment of the present invention, as shown in fig. 4, different from fig. 3, the fourth resistor 144 is omitted in fig. 4, thereby saving the circuit board area and reducing the manufacturing cost.
Optionally, the load 18 includes: and the relay and the diode are connected in parallel, wherein one end of the relay and one end of the diode are connected in parallel to a power supply, and the other end of the relay and the other end of the diode are connected in parallel to the other end of the control switch 16.
Specifically, as shown in fig. 3 and 4, the relay is labeled K102 and the diode is labeled D105.
To sum up, in the self-checking control circuit provided in the embodiment of the present application, the Relay port is first used as a Relay driving port to drive the Relay, and the check port is configured as an ad port to detect the ad, so as to determine the actual level output of the Relay port, and compare the actual level output with the state of the Relay port set in the program in the control chip 12, so as to detect whether the Relay port is working normally. When the Relay port is detected to be abnormal, the check port is configured to be an io port, namely the Relay port can be driven by replacing the Relay port, and the switching state of the Relay is completely determined by the state of the check port, namely the state of the Relay port cannot influence the working state of the Relay k 102.
Optionally, the self-checking control circuit provided in the embodiment of the present application further includes: the alarm device is connected with the control chip 12 and used for giving an alarm prompt under the condition that the input/output port is in fault; so that the user can timely know the operating state of the cooking appliance.
Specifically, the following alarm scheme is provided in the self-checking control circuit provided in the embodiment of the present application:
the first scheme is as follows:
further, optionally, the alarm device includes: the prompting module is connected with the control chip 12 and is used for performing alarm prompting in an acousto-optic and electric mode under the condition that the input/output port is in fault; so that the user can timely know the operating state of the cooking appliance.
Specifically, the prompt module may include: the buzzer and the LED module generate alarm sound through the buzzer; produce through the LED module and report an emergency and ask for help or increased vigilance photoelectricity phenomenon, if, flash, display status lamp, wherein, the scheme of display status lamp uses red status lamp to show cooking utensil trouble as an example in this application embodiment.
Scheme II:
optionally, the warning device includes: the communication module is connected with the control chip 12 and is used for sending fault information to the user terminal and/or the after-sales server under the condition that the input/output port is in fault; so that the user and the manufacturer can timely know the operating state of the cooking appliance.
Specifically, the communication module may be a radio frequency antenna, a chip, or a module capable of implementing communication, or a communication module capable of accessing a local area network or an ethernet network, so as to send the operating state of the cooking appliance to the user terminal and/or the after-sales server in a form of a message in time, where the message sent to the after-sales server may include an equipment number, a fault type, and a fault location. The confirmation of the location of the fault may be detected by the control chip 12.
The third scheme is as follows:
further, optionally, the alarm device includes: the prompting module and the communication module are respectively connected with the control chip 12 and used for giving an alarm in an acousto-optic form under the condition that the input/output port is in fault, and the communication module sends fault information to the user terminal and/or the after-sale server; so that the user and the manufacturer can timely know the operating state of the cooking appliance.
Specifically, according to the first scheme and the second scheme, the cooking appliance is prompted and alarmed on site in real time, and fault information of the cooking appliance can be sent to the user terminal and/or the after-sales server in an internet of things mode.
It should be noted that, in the embodiment of the present application, only the above example is used as an example to describe, and the implementation of the self-checking control circuit provided in the embodiment of the present application is subject to no limitation.
Example 2
According to an aspect of the embodiments of the present invention, there is provided a cooking appliance, including: a self-test control circuit, wherein the self-test control circuit comprises the self-test control circuit in embodiment 1.
Optionally, the cooking appliance comprises: an electric pressure cooker.
The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A self-test control circuit, comprising: a control chip (12), a resistor set (14), a control switch (16) and a load (18), wherein,
the input/output port of the control chip (12) is connected with one end of the control switch (16) through a first resistor (141) in the resistor set (14), the detection port of the control chip (12) is connected with the first resistor (141) through a second resistor (142) in the resistor set (14) and is coupled to one end of the control switch (16), and the other end of the control switch (16) is connected with the load (18); the first resistance (141) is greater than the second resistance (142).
2. The self-test control circuit according to claim 1, wherein the first terminal of the control switch (16) is connected in series with the first resistor (141) through a third resistor (143) of the resistor set (14), the third resistor (143) being connected in parallel with the second resistor (142); the second end of the control switch (16) is grounded, and the third end of the control switch (16) is connected with the load (18).
3. The self-test control circuit according to claim 2, wherein the control switch (16) comprises: the base of the triode is connected with the first resistor (141) in series through the third resistor (143), and the third resistor (143) is connected with the second resistor (142) in parallel; a fourth resistor (144) of the set of resistors (14) is coupled to ground with the emitter of the transistor, the fourth resistor (144) is coupled to the third resistor (143) in parallel with the first resistor (141) and the second resistor (142), and the collector of the transistor is connected to the load (18).
4. The self-test control circuit according to claim 2, wherein the control switch (16) comprises: the first end of the controllable silicon is connected with the first resistor (141) in series through the third resistor (143), the third resistor (143) is connected with the second resistor (142) in parallel, the second end of the controllable silicon is grounded, and the third end of the controllable silicon is connected with the load (18).
5. Self-test control circuit according to any of claims 1 to 4, characterized in that the load (18) comprises: the power supply comprises a relay and a diode, wherein one end of the relay and one end of the diode are connected in parallel to a power supply, and the other end of the relay and the other end of the diode are connected in parallel and connected with the other end of the control switch (16).
6. The self-test control circuit of claim 1, further comprising: and the alarm device is connected with the control chip (12) and is used for giving an alarm prompt under the condition that the input/output port is in fault.
7. The self-test control circuit of claim 6, wherein the alerting device comprises: the prompting module is connected with the control chip (12) and is used for performing alarm prompting in an acousto-optic and electric mode under the condition that the input/output port is in fault; or the like, or, alternatively,
the warning device includes: the communication module is connected with the control chip (12) and is used for sending fault information to a user terminal and/or an after-sales server under the condition that the input/output port is in fault; or the like, or, alternatively,
the warning device includes: the prompt module and the communication module are respectively connected with the control chip (12) and used for giving an alarm prompt in an acousto-optic mode under the condition that the input/output port is in fault, and the communication module sends fault information to a user terminal and/or an after-sale server.
8. The self-test control circuit according to claim 1, wherein the first resistor (141) and the second resistor (142) satisfy a preset condition, wherein the preset condition comprises:
r102 > 10 XR 104; or the like, or, alternatively,
(R102 × 5V)/(R104+ R102) is greater than the voltage Vh at which the control chip (12) determines to be high;
(R104 × 5V)/(R104+ R102) is smaller than the voltage Vl at which the control chip (12) judges to be low;
wherein, R102 is represented by the first resistor (141), R104 is represented by the second resistor (142), and 5V is the output voltage of the control chip (12).
9. A cooking appliance, comprising: a self-test control circuit, wherein the self-test control circuit comprises the self-test control circuit of any one of claims 1 to 8.
10. The cooking appliance of claim 9, wherein the cooking appliance comprises: an electric pressure cooker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922502032.2U CN211236636U (en) | 2019-12-31 | 2019-12-31 | Self-checking control circuit and cooking utensil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922502032.2U CN211236636U (en) | 2019-12-31 | 2019-12-31 | Self-checking control circuit and cooking utensil |
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| Publication Number | Publication Date |
|---|---|
| CN211236636U true CN211236636U (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922502032.2U Active CN211236636U (en) | 2019-12-31 | 2019-12-31 | Self-checking control circuit and cooking utensil |
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|---|---|
| CN (1) | CN211236636U (en) |
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- 2019-12-31 CN CN201922502032.2U patent/CN211236636U/en active Active
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