CN207074369U - Display board and domestic electric appliance - Google Patents
Display board and domestic electric appliance Download PDFInfo
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- CN207074369U CN207074369U CN201721028864.XU CN201721028864U CN207074369U CN 207074369 U CN207074369 U CN 207074369U CN 201721028864 U CN201721028864 U CN 201721028864U CN 207074369 U CN207074369 U CN 207074369U
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- 238000010586 diagram Methods 0.000 description 4
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The utility model discloses a kind of display board and domestic electric appliance, display board includes master controller, keystroke interface module, signal isolation module and display module, master controller has multiple I/O mouths, multiple I/O mouths and multiple push button signalling output ends of keystroke interface module connect one to one, and are connected one to one with multiple inputs of signal isolation module；Multiple output ends of signal isolation module and multiple display signal input parts of display module connect one to one；Wherein, keystroke interface module, receives the key command of user's input, and push button signalling corresponding to key command is exported；Master controller, when receiving push button signalling, export corresponding display signal；Signal isolation module, exported after the display signal received is carried out into signal isolation；Display module, the display signal exported according to signal isolation module work.When the utility model solves display module and button multiplexing, when display module breaks down, the problem of button can not use.
Description
Technical Field
The utility model relates to a show technical field, in particular to display panel and domestic appliance equipment.
Background
In the process of producing household electrical appliances such as an induction cooker, in order to reduce production cost and improve the I/O port reuse rate of a control chip, an LED lamp or a digital display tube and a touch key in a display module are mostly likely to be connected to the same I/O port of the control chip for pin reuse. However, when the LED lamp or the nixie tube has faults such as excessive leakage current, short circuit and the like, the touch key multiplexing one chip I/O port with the LED lamp or the nixie tube cannot be normally triggered or always outputs a trigger signal, and such an abnormal condition may affect normal use of the electrical equipment by a user, and even harm safety of the user.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing a display panel and domestic appliance equipment, aim at solving display module and button multiplex, when display module breaks down, the unable problem of using of button.
In order to achieve the above object, the present invention provides a display panel, which comprises a main controller, a key interface module, a signal isolation module and a display module, wherein the main controller has a plurality of I/O ports, the plurality of I/O ports are connected to a plurality of key signal output ends of the key interface module in a one-to-one correspondence manner, and the plurality of I/O ports are further connected to a plurality of input ends of the signal isolation module in a one-to-one correspondence manner; a plurality of output ends of the signal isolation module are correspondingly connected with a plurality of display signal input ends of the display module one by one; wherein,
the key interface module is used for receiving a key instruction input by a user and outputting a key signal corresponding to the key instruction to the main controller;
the main controller is used for outputting a corresponding display signal when the key signal is received;
the signal isolation module is used for isolating the received display signal and outputting the display signal;
and the display module is used for working according to the display signal output by the signal isolation module.
Preferably, the signal isolation module includes a plurality of unidirectional conductive elements, an input end of the plurality of unidirectional conductive elements is an input end of the signal isolation module, and an output end of the plurality of unidirectional conductive elements is an input end of the signal isolation module.
Preferably, the unidirectional conducting element is a diode, an anode of the diode is an input end of the unidirectional conducting element, and a cathode of the diode is an output end of the unidirectional conducting element.
Preferably, the unidirectional conducting element is an optical coupler, an input end of the optical coupler is an input end of the unidirectional conducting element, and an output end of the optical coupler is an output end of the unidirectional conducting element.
Preferably, the display module comprises an LED display unit and a nixie tube display unit, an input end of the LED display unit is connected with an I/O port corresponding to the main controller, an input end of the nixie tube display unit is connected with an I/O port corresponding to the main controller, and the LED display unit and the nixie tube display unit display numbers, characters or graphs under a control signal of the main controller.
Preferably, the key interface module is provided with a plurality of pull-up resistors corresponding to the plurality of key signal output ends; each input end of the signal isolation module is provided with a current limiting resistor.
Preferably, the display panel further includes a communication interface module, the main controller further includes a signal receiving terminal and a signal transmitting terminal, and two signal transmission terminals of the communication interface module are respectively and correspondingly connected with the signal receiving terminal and the signal transmitting terminal, so as to implement communication between the main controller and an external communication module.
Preferably, the communication interface module includes a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor, a first inductor and a communication interface, where the communication interface includes a plurality of terminals, a first end of the first resistor is connected to a signal transmitting end of the main controller, a second end of the first resistor is interconnected with the first terminal of the communication interface and the first end of the first capacitor, and a second end of the first capacitor is grounded; the first end of the second resistor is connected with the signal receiving end, and the second end of the second resistor is interconnected with the second terminal of the communication interface, the first end of the third resistor and the first end of the second capacitor; a second end of the third resistor is interconnected with a first end of the first inductor, a first end of a third capacitor, and a third terminal of the communication interface; the second end of the first inductor is connected with a power supply end of the main controller; and the second end of the second capacitor and the second end of the third capacitor are both grounded.
The utility model also provides a household appliance device, which comprises a power panel and the display panel, wherein the power panel is communicated with the main controller of the display panel through the communication interface module of the display panel; the display panel comprises a main controller, a key interface module, a signal isolation module and a display module, wherein the main controller is provided with a plurality of I/O ports, the I/O ports are correspondingly connected with a plurality of key signal output ends of the key interface module one by one, and the I/O ports are also correspondingly connected with a plurality of input ends of the signal isolation module one by one; a plurality of output ends of the signal isolation module are correspondingly connected with a plurality of display signal input ends of the display module one by one; the key interface module is used for receiving a key instruction input by a user and outputting a key signal corresponding to the key instruction to the main controller; the main controller is used for outputting a corresponding display signal when the key signal is received; the signal isolation module is used for isolating the received display signal and outputting the display signal; and the display module is used for working according to the display signal output by the signal isolation module.
Preferably, the power panel includes a power module and a control chip, the power module is connected to the power end of the display panel via the communication interface module, and the control chip is connected to the main controller via the communication interface module.
The utility model discloses be connected to main control unit 10's same IO mouth at display module and button interface module, in order to carry out the pin when multiplexing, set up the isolation module that corresponds between display module and button interface module, in order to carry out signal isolation with the display signal of input and output, thereby avoided display module to appear leaking the current too big, when faults such as short circuit, lead to with the unable normal triggering of button in the button interface module of the same IO mouth of the multiplexing main control unit of display module or export trigger signal always, and influence the normal use of user to electrical equipment, the problem of endangering user's safety even takes place. In addition, the signal isolation module can also avoid interference signals of the display module from entering the main controller to influence the normal work of the main controller.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic diagram of functional modules of the display panel of the present invention applied to a household appliance;
fig. 2 is a schematic diagram of a circuit configuration of the display panel shown in fig. 1;
fig. 3 is a schematic circuit diagram of a display module in the display panel shown in fig. 1;
fig. 4 is a schematic circuit diagram of a communication interface module in the display panel shown in fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Display panel | 40 | Display module |
| 200 | Power panel | 41 | LED display unit and |
| 10 | main controller | 42 | Nixie tube display unit |
| 20 | Key interface module | 201 | Power supply module |
| 30 | Signal isolation module | 202 | Master control chip |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely 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 belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a display panel is applied to in domestic appliance such as electromagnetism stove, rice cooker.
Referring to fig. 1, in an embodiment of the present invention, the display panel 100 includes a main controller 10, a key interface module 20, a signal isolation module 30 and a display module 40, the main controller 10 has a plurality of I/O ports, a plurality of the I/O ports are connected to a plurality of key signal output terminals of the key interface module 20 in a one-to-one correspondence, and a plurality of the I/O ports are further connected to a plurality of input terminals of the signal isolation module 30 in a one-to-one correspondence; a plurality of output ends of the signal isolation module 30 are connected with a plurality of display signal input ends of the display module 40 in a one-to-one correspondence manner; wherein,
the key interface module 20 is configured to receive a key instruction input by a user, and output a key signal corresponding to the key instruction to the main controller 10; the key interface module 20 has a plurality of keys, each key may be implemented by a touch key, or by a switch key such as a membrane switch key, and in this embodiment, each key is preferably a touch key.
The main controller 10 is configured to output a corresponding display signal when receiving the key signal; when the I/O interface of the main controller 10 receives a key signal output by a key in the key interface module 20, it outputs a corresponding display signal to respond to a key command corresponding to the key signal.
The signal isolation module 30 is configured to perform signal isolation on the received display signal and output the display signal; in this embodiment, the display module 40 is connected to the same I/O port of the main controller 10 through the signal isolation module 30 and the key interface module 20 for pin multiplexing, so as to reduce the production cost and improve the I/O port multiplexing rate of the main control chip 202. The signal isolation module 30 is configured to isolate a display signal input at an input end from an output end, so as to avoid a problem that when the display module 40 has faults such as excessive leakage current and short circuit, a key in the key interface module 20 that shares a chip I/O port with the display module 40 cannot be normally triggered or a trigger signal is always output, which affects normal use of an electrical device by a user and even endangers safety of the user. The signal isolation module 30 is also used to prevent interference signals of the display module 40 from entering the main controller 10 and affecting the normal operation of the main controller 10.
The display module 40 is configured to operate according to the display signal output by the signal isolation module 30, and display a module to display corresponding display content.
The utility model discloses be connected to main control unit 10's same IO mouth at display module 40 and key interface module 20, in order to carry out the pin when multiplexing, set up the isolation module that corresponds between display module 40 and key interface module 20, in order to carry out signal isolation with the display signal of input and output, thereby avoided display module 40 to leak current too big, when faults such as short circuit, lead to with the unable normal triggering of button or export triggering signal always in the key interface module 20 of the same IO mouth of display module 40 multiplexing main control unit 10, and influence the normal use of user to electrical equipment, the problem of endangering user's safety even takes place. In addition, the signal isolation module 30 can also prevent interference signals of the display module 40 from entering the main controller 10 and affecting the normal operation of the main controller 10.
Referring to fig. 1 to 4, in a preferred embodiment, the signal isolation module 30 includes a plurality of unidirectional conductive elements (not shown), wherein an input terminal of the plurality of unidirectional conductive elements is an input terminal of the signal isolation module 30, and an output terminal of the plurality of unidirectional conductive elements is an input terminal of the signal isolation module 30.
In this embodiment, in order to avoid interference signals of a later circuit from entering the main controller 10 and affecting normal operation of the key interface module 20, so as to implement signal isolation, when the unidirectional conducting element 50 receives the display signal output by the main controller 10, an input end of the unidirectional conducting element is at a high level, and an output end of the unidirectional conducting element is at a low level, a certain voltage difference is formed, and the unidirectional conducting element is conducted, and the display signal is output.
Further, in the above embodiment, the unidirectional conducting element may be implemented by a diode, and may also be implemented by an optocoupler, where when implemented by a diode, an anode of the diode is an input end of the unidirectional conducting element, and a cathode of the diode is an output end of the unidirectional conducting element. When the optical coupler is adopted for implementation, the input end of the optical coupler is the input end of the unidirectional conducting element, and the output end of the optical coupler is the output end of the unidirectional conducting element. Referring to fig. 2, fig. 2 shows 8 diodes, which are D1, D2, D3, D4, D5, D6, D7 and D8, respectively, in this embodiment, the diodes are taken as an example for explanation, and according to the unidirectional conductivity of the diodes, when the anode of the diode receives a high-level display signal, the anode of the diode is at a high level, and the cathode of the diode is at a low level, so as to conduct, and output the display signal.
Referring to fig. 1 to 4, in a preferred embodiment, the display module 40 includes an LED display unit 41 and a nixie tube display unit 42, an input end of the LED display unit 41 is connected to an I/O port corresponding to the main controller 10, an input end of the nixie tube display unit 42 is connected to an I/O port corresponding to the main controller 10, and the LED display unit 41 and the nixie tube display unit 42 display numbers, characters or graphics under a control signal of the main controller 10.
In the present embodiment, the LED display unit 41 is preferably implemented by a single light emitting diode, referring to fig. 2, fig. 2 shows 17 light emitting diodes (L11-L18, L21-L28, L31), which can satisfy the display of chinese characters, characters and simple figures, the nixie tube display unit 42 is preferably implemented by a 4-bit dynamic seven-segment nixie tube, the LED display unit 41 and the nixie tube display unit 42 are controlled by the main control chip 202, and when receiving the display signal output by the main controller 10, the numbers, characters or figures are further implemented to output and display different characters and numbers.
Referring to fig. 1 to 4, in a preferred embodiment, the key interface module 20 is provided with a plurality of pull-up resistors corresponding to the plurality of key signal output ends; each input end of the signal isolation module 30 is provided with a current limiting resistor. Referring to fig. 2, fig. 2 shows 8 pull-up resistors, and are R11, R12, R13, R14, R15, R16, R17, R18, respectively; and 8 current limiting resistors R21, R22, R23, R24, R25, R26, R27 and R28.
In this embodiment, the pull-up resistor is configured to clamp the level of the I/O port of the main controller 10 at a high level when no key signal is input at each key output terminal, so as to clamp an uncertain signal at the high level through the pull-up resistor, thereby preventing the main controller 10 from malfunctioning when receiving a non-key signal, and the current-limiting resistor is configured to prevent the display signal output by the main controller 10 from being abnormal and damage the diode when the output current is too large.
Referring to fig. 1 to 4, in a preferred embodiment, the display panel 100 further includes a communication interface module 50, the main controller 10 further includes a signal receiving terminal RXD and a signal transmitting terminal TXD, and two signal transmission terminals of the communication interface module 50 are correspondingly connected to the signal receiving terminal RXD and the signal transmitting terminal TXD, respectively, so that the main controller 10 communicates with an external communication module.
In this embodiment, the signal receiving terminal RXD of the main controller 10 module is connected to the signal transmitting terminal TXD of the external communication module via the communication interface module 50, and the signal transmitting terminal TXD of the main controller 10 module is connected to the signal receiving terminal RXD of the external communication module via the communication interface module 50 for communication.
Further, the communication interface module 50 includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first inductor L01, and a communication interface J1, where the communication interface J1 includes a plurality of terminals, a first terminal of the first resistor R1 is connected to the signal transmitting terminal TXD of the host controller 10, a second terminal of the first resistor R1 is connected to the first terminal of the communication interface J1 and the first terminal of the first capacitor C1, and a second terminal of the first capacitor C1 is grounded; a first end of the second resistor R2 is connected with the signal receiving terminal RXD, a second end of the second resistor R2 is interconnected with a second terminal of the communication interface J1, a first end of the third resistor R3 and a first end of a second capacitor C2; a second terminal of the third resistor R3 is interconnected with a first terminal of the first inductor L01, a first terminal of a third capacitor C3, and a third terminal of the communication interface J1; a second end of the first inductor L01 is connected to a power supply terminal VDD of the main controller 10; the second end of the second capacitor C2 and the second end of the third capacitor C3 are both grounded.
In this embodiment, the first capacitor C1 and the second capacitor C2 are used to filter noise in the signal, the third capacitor and the first inductor are used to filter noise in the power module 201, the first resistor R1 and the second resistor R2 are current-limiting resistors, respectively, the signal of the main controller 10 or the external communication interface J1 is abnormal, and when the output current is too large, other components are damaged.
The utility model discloses still provide a domestic appliance equipment.
Referring to fig. 1 to 4, the household appliance includes a power panel 200 and the display panel 100 as described above. In this embodiment, the power board 200 communicates with the main controller 10 of the display panel 100 through the communication interface module 50 of the display panel 100.
The detailed structure of the display panel 100 can refer to the above embodiments, and is not described herein; it can be understood that, because the utility model discloses above-mentioned display panel 100 has been used in the domestic appliance equipment, consequently, the utility model discloses domestic appliance equipment's embodiment includes all technical scheme of the whole embodiments of above-mentioned display panel 100, and the technical effect that reaches is also identical, no longer explains here.
Referring to fig. 1 to 4, further, the power board 200 includes a power module 201 and a main control chip 202, the power module 201 is connected to a power terminal VDD of the display panel 100 via the communication interface module 50, and the main control chip 202 is connected to the main controller 10 via the communication interface module 50.
In this embodiment, the power module 201 is connected to the main controller 10 via the communication interface module 50 to provide the main controller 10 with operating voltage, the main control chip 202 is connected to the main controller via the communication interface J1, and when the main control chip 202 is powered on, the power module 201 is controlled to provide power to the main controller 10. At this time, the main controller 10 is powered on and communicates with the main control chip 202.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (10)
1. A display panel (100) is characterized by comprising a main controller (10), a key interface module (20), a signal isolation module (30) and a display module (40), wherein the main controller (10) is provided with a plurality of I/O ports, the I/O ports are connected with a plurality of key signal output ends of the key interface module (20) in a one-to-one correspondence manner, and the I/O ports are also connected with a plurality of input ends of the signal isolation module (30) in a one-to-one correspondence manner; a plurality of output ends of the signal isolation module (30) are connected with a plurality of display signal input ends of the display module (40) in a one-to-one correspondence manner; wherein,
the key interface module (20) is used for receiving a key instruction input by a user and outputting a key signal corresponding to the key instruction to the main controller (10);
the main controller (10) is used for outputting a corresponding display signal when receiving the key signal;
the signal isolation module (30) is used for isolating the received display signal and outputting the display signal;
the display module (40) is used for working according to the display signal output by the signal isolation module (30).
2. A display panel (100) as claimed in claim 1 characterized in that the signal isolation module (30) comprises a plurality of unidirectional conducting elements, the input of the plurality of unidirectional conducting elements being the input of the signal isolation module (30) and the output of the plurality of unidirectional conducting elements being the input of the signal isolation module (30).
3. A display panel (100) as claimed in claim 2 characterized in that the unidirectional conducting element is a diode, the anode of the diode being the input of the unidirectional conducting element and the cathode of the diode being the output of the unidirectional conducting element.
4. A display panel (100) according to claim 2, wherein the unidirectional conducting element is an optocoupler, an input of the optocoupler being an input of the unidirectional conducting element, and an output of the optocoupler being an output of the unidirectional conducting element.
5. The display panel (100) of claim 1, wherein the display module (40) includes an LED display unit (41) and a nixie tube display unit (42), an input terminal of the LED display unit (41) is connected to an I/O port corresponding to the main controller (10), an input terminal of the nixie tube display unit (42) is connected to an I/O port corresponding to the main controller (10), and the LED display unit (41) and the nixie tube display unit (42) display numbers, characters or figures under a control signal of the main controller (10).
6. The display panel (100) of claim 1, wherein the key interface module (20) is provided with a plurality of pull-up resistors corresponding to a plurality of the key signal outputs; each input end of the signal isolation module (30) is provided with a current limiting resistor.
7. The display panel (100) according to claim 1, wherein the display panel (100) further comprises a communication interface module (50), the main controller (10) further comprises a signal receiving terminal (RXD) and a signal transmitting Terminal (TXD), and two signal transmission terminals of the communication interface module (50) are correspondingly connected to the signal receiving terminal (RXD) and the signal transmitting Terminal (TXD), respectively, so as to enable the main controller (10) to communicate with an external communication module.
8. The display panel (100) of claim 7, wherein the communication interface module (50) comprises a first resistor (R1), a second resistor (R2), a third resistor (R3), a third capacitor (C1), a second capacitor (C2), a third capacitor (C3), a first inductor (L01), and a communication interface, the communication interface comprising a plurality of terminals, a first terminal of the first resistor (R1) being connected to a signal transmitting Terminal (TXD) of the main controller (10), a second terminal of the first resistor (R1) being interconnected to a first terminal of the communication interface and a first terminal of a third capacitor (C1), a second terminal of the third capacitor (C1) being connected to ground; a first end of the second resistor (R2) is connected with the signal receiving end (RXD), and a second end of the second resistor (R2) is interconnected with a second terminal of the communication interface, a first end of the third resistor (R3) and a first end of a second capacitor (C2); a second terminal of the third resistor (R3) is interconnected with a first terminal of the first inductor (L01), a first terminal of a third capacitor (C3), and a third terminal of the communication interface; the second end of the first inductor (L01) is connected with a power supply end of the main controller (10); the second terminal of the second capacitor (C2) and the second terminal of the third capacitor (C3) are both grounded.
9. A household appliance device, characterized in that it comprises a power panel (200) and a display panel (100) according to any one of claims 1 to 8, said power panel (200) communicating with a main controller (10) of said display panel (100) via a communication interface module (50) of said display panel (100).
10. The household appliance device of claim 9, wherein the power board (200) comprises a power module (201) and a control chip (202), the power module (201) is connected to a power terminal of the display panel (100) via the communication interface module (50), and the control chip (202) is connected to the main controller (10) via the communication interface module (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721028864.XU CN207074369U (en) | 2017-08-16 | 2017-08-16 | Display board and domestic electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721028864.XU CN207074369U (en) | 2017-08-16 | 2017-08-16 | Display board and domestic electric appliance |
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| CN207074369U true CN207074369U (en) | 2018-03-06 |
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| CN201721028864.XU Active CN207074369U (en) | 2017-08-16 | 2017-08-16 | Display board and domestic electric appliance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109558350A (en) * | 2018-11-20 | 2019-04-02 | 海信（山东）空调有限公司 | A kind of program monitoring multiplexing port, control method and household electrical appliance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109558350A (en) * | 2018-11-20 | 2019-04-02 | 海信（山东）空调有限公司 | A kind of program monitoring multiplexing port, control method and household electrical appliance |
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