CN113612369B - Power supply circuit, household appliance and control method for household appliance - Google Patents

Power supply circuit, household appliance and control method for household appliance Download PDF

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Publication number
CN113612369B
CN113612369B CN202110865574.5A CN202110865574A CN113612369B CN 113612369 B CN113612369 B CN 113612369B CN 202110865574 A CN202110865574 A CN 202110865574A CN 113612369 B CN113612369 B CN 113612369B
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China
Prior art keywords
power supply
circuit
switch
branch
display
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CN202110865574.5A
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CN113612369A (en
Inventor
葛金榜
周胜梅
王增强
丁兆波
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Hisense Refrigerator Co Ltd
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Hisense Refrigerator Co Ltd
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Priority to CN202110865574.5A priority Critical patent/CN113612369B/en
Publication of CN113612369A publication Critical patent/CN113612369A/en
Priority to PCT/CN2022/104686 priority patent/WO2023005643A1/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • 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
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The application belongs to the technical field of household appliances, and particularly discloses a power supply circuit, a household appliance and a control method for the household appliance; the display control method is characterized in that the display control method comprises the steps that at least one control structure is connected with a second switch signal input end, an enabling end is controlled through a second switch signal output end, and after the enabling end is controlled to be activated by the at least one control structure, a third branch circuit is communicated with a first branch circuit, so that equipment related to a display in the household appliance enters a working state; and when domestic appliance standby, only the second branch road is in the connected state with the power end of second switch, and holistic consumption is little this moment, can realize reducing the standby power consumption of the equipment relevant with the display among the domestic appliance through the circuit design structure of this application, power resources are saved.

Description

Power supply circuit, household appliance and control method for household appliance
Technical Field
The application belongs to the technical field of household appliances, and particularly relates to a power supply circuit, a household appliance and a control method for the household appliance.
Background
Home appliances mainly refer to various electric and electronic appliances used in homes and the like. The existing household appliances are added with display equipment for displaying various parameters; the display device is a display tool which displays a certain electronic file on a screen through a specific transmission device and reflects the electronic file to human eyes. It can be classified into various types such as CRT (cathode ray tube), LCD (liquid crystal display), and the like.
However, most of the displays of the household appliances still consume a large amount of power consumption due to the defects of circuit design when the household appliances are in a standby state, and the power resources are greatly wasted.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present application and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.
Disclosure of Invention
The present application aims to provide a power supply circuit, a household appliance, and a control method for the household appliance, which at least to some extent overcome the technical problems in the related art that the standby power consumption of the display-related devices in the household appliance is large, and the like.
Other features and advantages of the present application will be apparent from the following detailed description, or may be learned by practice of the application.
According to an aspect of an embodiment of the present application, a power supply circuit for a household appliance, the household appliance comprising a display, a display chip and at least one control structure, the power supply circuit comprising a power supply circuit, a first switch, a second switch and a first power conversion circuit; wherein:
the power supply circuit is provided with a first branch circuit, a second branch circuit and a third branch circuit;
the first branch is connected with the display through the first switch;
the second branch circuit is respectively connected with a power supply end of the second switch and a signal input end of the second switch;
the signal input end of the second switch is also connected with the at least one control structure and can receive a control signal of the at least one control structure;
the third branch circuit is connected with the input end of the first power supply conversion circuit;
the output end of the first power supply conversion circuit is connected with the power supply end of the display chip, the first power supply conversion circuit is provided with an enabling end connected with the signal output end of the second switch, the enabling end can be activated when a control signal output by the control structure meets the requirement, and the first power supply conversion circuit can supply power to the display chip through the output end of the first power supply conversion circuit after the enabling end of the first power supply conversion circuit is activated;
the signal output end of the display chip is connected with the signal input end of the first switch, and the display chip is used for controlling the on-off of the first switch;
and the signal output by the second branch circuit to the signal input end of the second switch does not meet the activation requirement of the enabling end.
In some embodiments of the present application, based on the above technical solution, the at least one control structure further includes a main control chip connected to the display chip, and the power supply circuit includes a first adjusting resistor and a first node;
one end of the first adjusting resistor is connected with the second branch circuit, and the other end of the first adjusting resistor is connected with the first node;
the first node is connected with the signal input end of the second switch and is also connected with the signal output end of the main control chip.
In some embodiments of the present application, the at least one control structure further comprises a master control switch, and the power supply circuit further comprises a second regulating resistor and a second node;
one end of the second adjusting resistor is connected with the second branch circuit, and the other end of the second adjusting resistor is connected with the second node;
the second node is connected with the signal input end of the second switch and is also connected with the signal output end of the master control switch.
In some embodiments of the present application, the power supply circuit further comprises a third regulating resistor and a third node;
one end of the third adjusting resistor is connected with the second branch circuit, and the other end of the third adjusting resistor is connected with the third node;
the third node is connected with the signal input end of the second switch and also connected with the signal output end of the display chip.
In some embodiments of the present application, the second switch is an inverter.
In some embodiments of the present application, the power supply circuit further includes a second power conversion circuit, one end of the second power conversion circuit is connected to the second branch, and the other end of the second power conversion circuit is connected to the power terminal and the signal input terminal of the second switch, respectively.
In some embodiments of the present application, the household appliance further comprises an external load, and the power supply circuit further comprises a third power conversion circuit; wherein the content of the first and second substances,
the output end of the first power supply switching circuit is connected with an external load through a first power supply branch circuit and is connected with the third power supply switching circuit through a second power supply branch circuit, and the first power supply branch circuit is connected with the second power supply branch circuit in parallel;
the third power conversion circuit is connected with the power end of the display chip.
According to an aspect of an embodiment of the present application, there is provided a household appliance, including a display, a display chip, at least one control structure, and a power supply circuit, where the power supply circuit includes a power supply circuit, a first switch, a second switch, and a first power conversion circuit; wherein:
the power supply circuit is provided with a first branch circuit, a second branch circuit and a third branch circuit;
the first branch is connected with the display through the first switch;
the second branch circuit is respectively connected with a power supply end of the second switch and a signal input end of the second switch;
the signal input end of the second switch is also connected with the control structure and can receive a control signal of the at least one control structure;
the third branch circuit is connected with the input end of the first power supply conversion circuit;
the output end of the first power supply conversion circuit is connected with the power supply end of the display chip, the first power supply conversion circuit is provided with an enabling end connected with the signal output end of the second switch, the enabling end can be activated when a signal output by the second switch meets the requirement, and the first power supply conversion circuit can supply power to the display chip through the output end of the first power supply conversion circuit after the enabling end of the first power supply conversion circuit is activated;
the signal output end of the display chip is connected with the signal input end of the first switch, and the display chip is used for controlling the on-off of the first switch;
and the signal output by the second branch circuit to the signal input end of the second switch does not meet the activation requirement of the enabling end.
In some embodiments of the present application, based on the above technical solutions, the at least one control structure includes a main control chip, and the household appliance further includes a power supply filter rectification circuit and an isolation circuit;
the power supply filtering and rectifying circuit is respectively connected with the main control chip and the isolation circuit;
the main control chip is connected with the signal input end of the second switch and the display chip through the isolation circuit, and the isolation circuit is further connected with the power circuit.
According to an aspect of an embodiment of the present application, there is provided a control method of a home appliance, for the home appliance described above, the control method including:
sending an activation signal to a signal input end of the second switch according to a working instruction received by the household appliance to activate the enabling end, so that the power supply circuit supplies power to the display chip through a third branch circuit;
controlling the display chip to send a closing signal to the first switch so that the power supply circuit supplies power to the display through the first branch circuit;
and controlling the display chip to continuously send an activation signal to the signal input end of the second switch so as to continuously activate the enabling end.
In the technical scheme provided by the embodiment of the application, the application is connected with a second switch signal input end through at least one control structure, the second switch signal output end is connected with an enabling end, the second switch is used for controlling the enabling end to be activated, when the household appliance needs to work, the at least one control structure can realize the activation of the enabling end by giving a control signal to the second switch signal input end, so that the power supply of the display chip is realized, the communication of a third branch is realized, the display chip can control the closing of a first switch of a first branch, the communication of the first branch is realized, and the work of the display chip and the display is realized; when the household appliance is in standby, because the signal output to the signal input end of the second switch by the second branch circuit does not reach the activation requirement of the enabling end, only the second branch circuit is in a communicated state with the power supply end of the second switch, the overall power consumption is extremely low, and the power resources are effectively saved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 schematically shows a circuit diagram of a supply circuit.
Fig. 2 schematically shows a circuit diagram of a power supply circuit after an isolation process of a household appliance.
Fig. 3 schematically shows a flow chart of a control method for a household appliance.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the embodiments of the present application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the application.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.
The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
The power supply circuit and the method provided by the present application are described in detail below with reference to specific embodiments.
Home appliances mainly refer to various electric and electronic appliances used in homes and the like. The household appliances are released from the heavy, trivial and time-consuming housework of people, create more comfortable and beautiful life and working environment which are more beneficial to physical and mental health for human beings, provide rich and colorful cultural entertainment conditions, and become necessities of modern family life.
Display equipment is required to be used in a plurality of household appliances used in life, and the display equipment is a display tool which displays a certain electronic file on a screen through specific transmission equipment and reflects the electronic file to human eyes. Many display devices not only have a display function, but also include various functional modules, such as wifi (mobile hotspot) modules, networking modules, USB modules, and other external loads and modules of other display devices, and thus, a plurality of driver chips are involved. In the standby circuit design, when the household appliance is in a standby state, each driving chip also has power consumption, so that the problem of high standby power consumption is also brought, and the power resource is greatly wasted.
Taking a dry-cleaning washing machine as an example, the dry-cleaning washing machine needs to display the current state through a display device, while some conventional washing machines display the current state through an LED (light emitting diode) display scheme, but the driving method using the scheme is simple and monotonous in display content, and the content with smooth animation effect cannot be displayed on the LED display device. In order to display the content with the animation effect, an LCD display scheme needs to be utilized, but since the LCD screen has large power consumption and needs to be used together with the LCD display driving chip, the LCD display driving chip also has power consumption, which also causes the problem of large standby power consumption. Therefore, no power supply circuit can well solve the problem of high power consumption of display-related equipment in the household appliance during standby.
In accordance with an aspect of an embodiment of the present application, based on the above problem, as shown in fig. 1, fig. 1 schematically shows a circuit diagram of a power supply circuit. The application provides a power supply circuit for a household appliance, the household appliance used in the application comprises a display 1, a display chip 2 and at least one control structure, and the power supply circuit specifically comprises a power supply circuit 41, a first switch 42, a second switch 43 and a first power supply conversion circuit 44; wherein:
the power circuit 41 has a first branch 411, a second branch 412 and a third branch 413; the power circuit 41 provides power to the whole power supply circuit, for example, the voltage output of the power circuit 41 may be set to 17V, where the power circuit 41 outputs power through three branches, which are the first branch 411, the second branch 412, and the third branch 413. The functions and functions of the three branches are different, and the functions of the respective branches will be described in detail below.
The first branch 411 is a display branch, and is used for supplying power to the display 1 to display the display 1. The first branch 411 is connected with the display 1 through the first switch 42, and the first switch 42 is used for switching on and off the first branch 411, when the first switch 42 is closed, the first branch 411 is connected, the power circuit 41 can supply power to the corresponding display 1, and when the first switch 42 is disconnected, the first branch 411 is disconnected, and the display 1 cannot display images. For example, a voltage of 17V may be output by the power supply circuit 41 to supply power to the display 1, so as to realize visualization of the display 1.
The third branch 413 is a working branch, and the display of the whole household appliance can normally work only when the third branch 413 is connected. The third branch 413 is connected to the input terminal of the first power conversion circuit 44, the output terminal of the first power conversion circuit 44 is connected to the power terminal of the display chip 2, the first power conversion circuit 44 has an enable terminal 441 connected to the signal output terminal of the second switch 43, the enable terminal 441 can be activated when the control signal output by the control structure meets the requirement, and the first power conversion circuit 44 can supply power to the display chip 2 through the output terminal thereof after the enable terminal 441 is activated.
The signal input of the second switch 43 of the present application is further connected to at least one control structure, and is capable of receiving a control signal of the at least one control structure. When at least one control structure sends a control signal to the signal input terminal of the second switch 43, the control signal may reach the enable terminal 441 through the signal output terminal of the second switch 43 to enable the enable terminal 441 to be activated, so as to control the first power conversion circuit 44 to supply power to the display chip 2 through the output terminal thereof after the enable terminal 441 is activated, thereby enabling the third branch 413 to be connected.
The signal output end of the display chip 2 is connected to the signal input end of the first switch 42, the display chip 2 is used for controlling the on-off of the first switch 42, and after the third branch 413 is connected, the display chip 2 controls the first switch 42 to be closed, so that the first branch 411 is connected.
The second branch 412 is a standby branch, the second branch 412 is respectively connected to the power terminal of the second switch 43 and the signal input terminal of the second switch 43, when the whole household appliance is in a standby state, only the second branch 412 is in a normal working state, and the energy consumption of the second branch 412 is small. The reason why the second branch 412 consumes less power is that the signal output from the second branch 412 to the signal input terminal of the second switch 43 does not meet the activation requirement of the enable terminal 441. When at least one control structure does not send a control signal to the signal input terminal of the second switch 43, the signal output by the second branch 412 is input to the signal input terminal of the second switch 43, and the signal output by the second branch 412 to the signal input terminal of the second switch 43 does not meet the activation requirement of the enable terminal 441, therefore, under the condition that at least one control structure does not send a signal to the signal input terminal of the second switch 43, only the second branch 412 is kept in a normal working state in the present application, at this time, the power circuit 41 of the present application only supplies power to the power terminal of the second switch 43, the power consumption at this time is small, and the function of small power consumption in a standby state is realized. In the present application, when at least one control structure sends a control signal to the signal input terminal of the second switch 43, the normal working states of the display, the display chip related to the display and the external load in the household appliance can be realized. Therefore, the problem that power consumption is large when the display device in the household appliance is in standby is well solved.
The above section describes the overall construction of the power supply circuit of the present application, and further details of the power supply circuit are described in detail below.
The key for controlling the household appliance and the display related device to enter the working state is that the third branch 413 needs to be connected, and the necessary condition for connecting the third branch 413 is that the enable terminal 441 of the first power conversion circuit 44 is activated, and the output terminal of the first power conversion circuit 44 can supply power to the display chip 2 only when the enable terminal 441 of the first power conversion circuit 44 is activated. The enable terminal 441 is also called an enable input terminal, and is an input port of the first power conversion circuit 44, and only when the input port is activated, the first power conversion circuit 44 can operate, so that the output terminal of the first power conversion circuit 44 supplies power to the display chip 2.
The enable terminal 441 is normally active high, but may alternatively be active low. Therefore, if it is desired to have enable terminal 441 active, it is desired to give it a signal, which may be a high signal or a low signal. The enable terminal 441 is connected to the signal output terminal of the second switch 43, and when the signal output terminal of the second switch 43 provides a signal that the enable terminal 441 meets the requirement, the enable terminal 441 can be controlled to be activated.
The control signal output by the control structure meets many requirements, and the enable terminal 441 is activated by a high-level signal in the embodiment shown in fig. 1.
In one embodiment of the present application, the second switch 43 is an inverter. The inverter can invert the phase of the input signal by 180 degrees, that is, output a low level when the input terminal receives a high level and output a high level when the input terminal receives a low level. Therefore, in this embodiment of the present application, the enable terminal 441 is enabled only when the input terminal of the second switch 43 inputs a low level signal and the corresponding output terminal of the second switch 43 outputs a high level signal, so as to connect the third branch 413.
The second switch 43 of the present application may also use other control elements, so that when at least one control structure sends a control signal to the signal input terminal of the second switch 43, the signal output by the output terminal of the second switch 43 may activate the enable terminal 441, and at the same time, the signal output by the second branch 412 to the second switch 43 may not activate the enable terminal 441. Not limited to inverters.
The structure of the second switch 43 of the present application is described above, and the control manner and the specific structure of the at least one control structure of the present application are described next, and when the specific structure of the at least one control structure of the present application is different, the corresponding power supply circuit is also different. Several different control configurations are described below.
In an embodiment of the present application, based on the above technical solution, the at least one control structure further includes a main control chip 31 connected to the display chip 2, and when the at least one control structure is the main control chip 31, the power supply circuit includes a first adjusting resistor 311 and a first node 312; one end of the first adjusting resistor 311 is connected to the second branch 412, and the other end is connected to the first node 312; the first node 312 is connected to a signal input terminal of the second switch 43, and is also connected to a signal output terminal of the main control chip 31.
When the control structure is the main control chip 31, in order to satisfy the requirement that the main control chip 31 sends a control signal to the signal input end of the second switch 43, the signal output by the output end of the second switch 43 may activate the enable end 441, and meanwhile, the signal output by the second branch 412 to the second switch 43 may not activate the enable end 441. In the present application, a first node 312 and a first adjusting resistor 311 need to be added between the main control chip 31 and the signal input end of the second switch 43, and one end of the first adjusting resistor 311 is connected to the second branch 412, and the other end is connected to the first node 312; the first node 312 is connected to a signal input terminal of the second switch 43 and is also connected to a signal output terminal of the main control chip 31. Here, the first adjusting resistor 311 is a pull-up resistor, and the first adjusting resistor 311 functions as: when the main control chip 31 does not send a control signal to the signal input terminal of the second switch 43, it is ensured that the first node 312 is at a reliable high level, the input terminal of the second switch 43 receives the high level and outputs a low level, and the enable terminal 441 is not activated; when the main control chip 31 sends a control signal to the signal input terminal of the second switch 43, the first node 312 is at a low level, the input terminal of the second switch 43 receives the low level and outputs a high level, and the enable terminal 441 is activated.
The low level signal of the input end of the second switch 43, which is provided by the main control chip 31 of the present application, is based on the control of the whole household appliance received by the main control chip 31 from the outside. The control received by the main control chip 31 may be received voice operation information, for example, when the user controls to turn on the household appliance by voice, the main control chip 31 will give a low level signal to the input terminal of the second switch 43, so as to implement the operation of the display chip 2 and other loads of the household appliance and the display 1. When the user controls the household appliance by voice to be in a standby state, the main control chip 31 does not send any signal, and the first branch 411 and the third branch 413 are disconnected. There are various ways for the control signal received by the main control chip 31, and the control signal may also include a received infrared sensing signal, a control signal of a remote terminal, and the like.
Besides the above forms, when the method is specifically applied to different household appliances, the control of the signals of the main control chip 31 can also be realized through other control signals. For example, for a dry-cleaning washing machine, when a user opens the door of the laundry bin, the main control chip 31 receives a door opening signal and then sends a low level signal to the input end of the second switch 43, so as to implement the operation of the display chip 2 and other loads of the household appliance and the display 1. The effect of opening the door and starting the machine can be realized by utilizing the scheme. And similarly, when the refrigerator door is applied to the refrigerator, the door can be opened and the refrigerator can be started.
The above circuit control of the present application can be used for the display 1 of the household appliance and the display chip 2 and the external load 6 related to the display 1, and also can be used for other controls of the household appliance. The application field also includes that the household appliance is plugged with a power line to a household socket of a user, and when the user is not started for use, the household appliance is also in a standby state, and the application is mainly suitable for power consumption in the standby state. When the power cord is plugged into a socket of a user and the user is not started for use, other functions of the household appliance are not turned on, and the whole household appliance is in a standby state. However, the application is not only applicable to the standby state, but also can only play a standby role in displaying the display or the display chip which is turned off first under the condition of not influencing other functions of the household appliance. When applied to the display 1 of the household appliance and the display chip 2 and the external load 6 associated with the display 1, the display 1 and the display chip 2 and the external load 6 associated with the display 1 are only generally targeted, i.e. the third branch 413 and the first branch 411 in the present application, and the contents of other functions of the household appliance are not affected. For example, for a refrigerator, when a door is opened, the main control chip 31 will monitor a door opening signal and control the working state of the display 1 of the refrigerator, and at this time, the display 1 corresponding to the refrigerator will be opened, so as to implement the working of the display chip 2 and the external load 6 of the display 1 related to the display 1. When the door is closed, the display is correspondingly closed, and is in a standby state at this time, which generally means that the display chip 2, the display 1 and the external load 6 related to the display 1 are in a standby state. The cooling function of the refrigerator is performed as usual. The same applies to the washing machine, and when the washing machine is closed, the washing and dewatering functions inside the washing machine are performed as usual. Therefore, the present application is mainly used for controlling the display chip 2, the display 1 and the external load 6 related to the display 1 in the household appliance.
One specific control scheme for at least one control structure is disclosed above, followed by a second control structure.
In one embodiment of the present application, the at least one control structure further comprises a master switch 32, wherein one end of the master switch 32 is connected to ground, and the other end is connected to the signal input end of the second switch 43. The corresponding power supply circuit further includes a second adjusting resistor 321 and a second node 322; one end of the second adjusting resistor 321 is connected to the second branch 412, and the other end is connected to the second node 322; the second node 322 is connected to a signal input of the second switch 43 and also to a signal output of the overall control switch 32.
The control mode of the main control switch 32 is consistent with that of the main control chip 31, and all that is to ensure that when the main control switch 32 sends a control signal to the signal input end of the second switch 43, the second node 322 receives a low level signal at the low level second switch signal input end and outputs a high level signal, the enable end 441 is activated, and the first power conversion circuit 44 works normally, so that the display chip 2 and the display 1 of the whole household appliance are both in a working state. And will not be described in detail herein.
In this application, after the two control structures are turned on, the second switch 43 can be controlled in another way. The specific control scheme is as follows:
the signal input end of the second switch 43 of the present application can not only receive the control signals from the main control chip 31 and the general control switch 32. It is also possible to receive control signals from the display chip 2. The control signal of the display chip 2 is different from the above two, and the display chip 2 must supply power through the third branch 413 before sending the control signal to the signal input end of the second switch 43, so that the display chip 2 of the present application continuously controls the second switch 43 after being powered on, and continuously sends a low level signal to the signal input end of the second switch 43 to control the enable end 441 to be continuously activated. The purpose of this design is to achieve that the display 1 and the display chip 2 of the whole household appliance are continuously in an operating state. The subsequent continuous control of the second switch 43 by the present application may be the single continuous control of the main control chip 32, the single continuous control of the display chip 2, or the common continuous control of the main control chip 32 and the display chip 2.
In one embodiment of the present application, the power supply circuit further includes a third regulating resistor 331 and a third node 332; one end of the third adjusting resistor 331 is connected to the second branch 412, and the other end is connected to the third node 332; the third node 332 is connected to a signal input terminal of the second switch 43 and is also connected to a signal output terminal of the display chip 2. The control mode of the display chip 2 is consistent with that of the main control switch, so as to ensure that the third node 332 is at a low level when the display chip 2 sends a control signal to the signal input terminal of the second switch 43. Therefore, stable control signals of the main control chip 31 are realized, and the display chip 2 and the display 1 of the whole household appliance are in working states. And will not be described in detail herein.
Wherein, several kinds of control structure above, this application can all set up simultaneously, also can carry out following several kinds of different settings: firstly, when there is a master control switch 32, there must be at least one master control chip 31 and display chip 2, and the master control switch 32 needs to be used in cooperation with the master control chip or the display chip; only the master control switch 32 cannot be used normally; secondly, when the master control switch 32 is not provided, only the master control chip 31 can be normally used, but only the display chip cannot be normally used; and thirdly, the main control chip and the display chip can work normally.
The reason that the power consumption is low when only the second branch 412 works in the present application is that when all the control structures do not send a control signal to the signal input terminal of the second switch 43, the input terminal of the second switch 43 receives a high level signal input by the second power conversion circuit after passing through the first adjusting resistor 311, the second adjusting resistor 321, and the third adjusting resistor 331, so that the low level signal output to the enable terminal 441 by the second switch does not reach the activation requirement of the enable terminal 441. Therefore, in the case where all the control structures do not send a low signal to the signal input terminal of the second switch 43, both the third branch and the first branch are not operated in the present application, and only the second branch 412 remains in an operating state, so that the power consumption of the whole circuit is very small.
Specific control of at least one of the control structures is disclosed above, followed by disclosure of additional structures on the second leg 412 and third leg 413 of the present application.
In an embodiment of the present application, the power supply circuit further includes a second power conversion circuit 5, and one end of the second power conversion circuit 5 is connected to the second branch 412, and the other end is connected to the power terminal and the signal input terminal of the second switch 43, respectively.
The second power supply changeover circuit 5 functions to change over the voltage of the power supply circuit 41 so that the power supply terminal output to the second switch 43 is smaller, achieving lower power consumption. For example, the output voltage of the power supply circuit 41 of the present application is 17V, and the voltage converted by the second power supply conversion circuit 5 is 5V.
In one embodiment of the present application, the household appliance further comprises an external load 6, and the power supply circuit further comprises a third power conversion circuit 7; the output end of the first power conversion circuit 44 is connected to the external load 6 through a first power supply branch 71, and is connected to the third power conversion circuit 7 through a second power supply branch 72, and the first power supply branch 71 is connected in parallel to the second power supply branch 72; the third power conversion circuit 7 is connected to the power supply terminal of the display chip 2. The external load 6 corresponding to the present application includes an external load 6 related to the display device, such as a wifi module, a networking module, and a USB module of the display device. According to the application, the external load 6 and the display chip 2 are controlled and connected through the third branch 413, and when the third branch 413 is disconnected, the external load 6 related to the display device and the display chip 2 are also disconnected, so that the power consumption in a standby state can be effectively reduced.
The third power conversion circuit 7 of the present application is for further converting the voltage required by the display chip 2. For example, the voltage output by the power supply circuit 41 is 17V, the voltage output by the first power conversion circuit 44 is 5V, and the voltage output by the third power conversion circuit 7 is 3.3V. Therefore, 5V is supplied to the external load 6 of the display device and 3.3V is supplied to the display chip 2, further reducing power consumption. Meanwhile, the display chip 2 of the present application can also directly use 5V power supply, and correspondingly, the third power conversion circuit 7 can be removed to realize direct power supply.
The above section discloses a power supply circuit, and the following continues to disclose a household appliance.
According to an aspect of an embodiment of the present application, there is provided a household appliance, the household appliance includes a display 1, a display chip 2, at least one control structure, and a power supply circuit, the power supply circuit includes a power supply circuit 41, a first switch 42, a second switch 43, a first power conversion circuit 44; wherein:
the power circuit 41 has a first branch 411, a second branch 412 and a third branch 413;
the first branch 411 is connected with the display 1 through the first switch 42;
the second branch 412 is connected to the power terminal of the second switch 43 and the signal input terminal of the second switch 43, respectively;
the signal input end of the second switch 43 is also connected with the control structure;
the third branch 413 is connected to the input terminal of the first power conversion circuit 44;
the output end of the first power conversion circuit 44 is connected with the power end of the display chip 2, the first power conversion circuit 44 has an enable end 441 connected with the signal output end of the second switch 43, the enable end 441 can be activated when the signal output by the second switch 43 meets the requirement, and the first power conversion circuit 44 can supply power to the display chip 2 through the output end thereof after the enable end 441 is activated;
the signal output end of the display chip 2 is connected to the signal input end of the first switch 42, and the display chip 2 is used for controlling the on-off of the first switch 42.
The power supply circuit part in the household appliance corresponding to the present application is similar to the power supply circuit, and is not described herein again.
When the household appliance is used specifically, the household appliance is in direct contact with a person, so that the danger of electric shock exists during use, and therefore the household appliance is optimized, and a specific optimization scheme is as follows.
In an embodiment of the present application, based on the above technical solution, as shown in fig. 2, fig. 2 schematically shows a circuit diagram of a power supply circuit after a household appliance performs an isolation process.
The at least one control structure comprises a main control chip 31, a power supply filter and rectifier circuit 8 and an isolation circuit 9; the power supply filtering and rectifying circuit 8 is respectively connected with the main control chip 31 and the isolation circuit 9; the main control chip 31 is connected with the signal input end of the second switch 43 and the display chip 2 through the isolation circuit 9, and the isolation circuit 9 is also connected with the power circuit 41. Wherein power filter rectifier circuit 8 of this application can the direct connection domestic power, the live wire and the zero line of the domestic alternating current of direct connection, consequently, need isolation circuit 9 to protect when using. In the application, the isolation circuit 9 is used for connecting the power supply filter rectification circuit 8 with the power supply circuit 41 through the isolation circuit 9, so that the operation safety of the power supply circuit 41 can be ensured, and the electric shock danger can be prevented. Simultaneously, main control chip 31 of this application is connected with second switch 43's signal input part and display chip 2 through isolating circuit 9, has also protected second switch 43's signal input part and display chip 2, realizes the power consumption safety.
And the design of the isolation circuit 9 of the present application can use the combination of transformer magnetic isolation and opto-electronic isolation of the opto-coupler to realize the electrical isolation between the primary side and the secondary side. The electrical isolation between the power supply filter rectifying circuit 8 and the power supply circuit 41 and the electrical isolation between the main control chip 31 and the signal input end of the second switch 43 and the display chip 2 can be realized through the design.
The above section discloses a specific household appliance, and the following continues to disclose a control method for the household appliance.
According to an aspect of an embodiment of the present application, as shown in fig. 3, fig. 3 schematically shows a flowchart of a control method for a home appliance. The specific method for the household appliance comprises the steps S310 to S330. The control method comprises the following steps:
step S310: and sending an activation signal to a signal input end of the second switch according to a working instruction received by the household appliance so as to activate an enabling end, so that the power supply circuit supplies power to the display chip through the third branch.
The working instruction of the household appliance can be from an external control signal, for example, a door opening signal or a voice signal from the household appliance, and after the household appliance receives the external working instruction, the household appliance sends an activation signal to the signal input end of the second switch to activate the enable end, so that the power supply circuit supplies power to the display chip through the third branch, the third branch of the household appliance is conducted, and the display chip starts to work at the moment.
Step S320: and controlling the display chip to send a closing signal to the first switch so that the power supply circuit supplies power to the display through the first branch circuit.
After the display chip works, the display chip sends a closing signal to the first switch so that the power supply circuit supplies power to the display through the first branch circuit to realize display of the display.
Step S330: and controlling the display chip to continuously send an activation signal to the signal input end of the second switch so as to continuously activate the enabling end.
Simultaneously, after the display chip work, the domestic appliance that this application corresponds still can control the display chip and continue to send activation signal for the signal input part of second switch to make the enable terminal continue the activation, can realize the continuous control to the signal input part of second switch, the display device that continuously controls domestic appliance is in operating condition.
In the technical solution provided in the embodiment of the present application, the present application connects a second switch signal input end through at least one control structure, connects an enable end through a second switch signal output end, and is used for controlling the activation of the enable end, the enable end is disposed on a first power conversion circuit, the connection of a third branch can be realized after the activation of the enable end, the third branch is directly connected to a power end of a display chip, a signal output end of the display chip is connected to a signal input end of a first switch controlling the connection of the first branch, the second branch is connected to the power end of the second switch and the signal input end of the second switch, respectively, a signal output by the second branch to the signal input end of the second switch does not reach the activation requirement of the enable end, therefore, when the household appliance needs to work, the at least one control structure can activate the enable end by providing a control signal to the second switch signal input end, thereby realizing the power supply to the display chip, so as to realize the connection of the third branch, and the display chip can control the first switch of the first branch to be closed, so as to realize the connection of the first branch, and enter a working state; when domestic appliance standby, because the signal of second branch road output to the signal input part of second switch does not reach the activation requirement of enabling end, only the power end of second branch road and second switch is in the connected state this moment, and domestic appliance gets into standby state, and holistic consumption is minimum this moment, and the effectual display device who has solved current domestic appliance problem that the consumption is big when standby state, can effectually promote each domestic appliance in, the suitability is wider.
It should be noted that although the steps of the methods in this application are depicted in the drawings in a particular order, this does not require or imply that the steps must be performed in this particular order or that all of the depicted steps must be performed to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.
It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functions of two or more modules or units described above may be embodied in one module or unit according to embodiments of the application. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (10)

1. A power supply circuit is used for a household appliance, the household appliance comprises a display, a display chip and at least one control structure, and the power supply circuit is characterized by comprising a power supply circuit, a first switch, a second switch and a first power supply conversion circuit; wherein:
the power supply circuit is provided with a first branch circuit, a second branch circuit and a third branch circuit;
the first branch is connected with the display through the first switch;
the second branch circuit is respectively connected with a power supply end of the second switch and a signal input end of the second switch;
the signal input end of the second switch is also connected with the at least one control structure and can receive a control signal of the at least one control structure;
the third branch circuit is connected with the input end of the first power supply conversion circuit;
the output end of the first power supply conversion circuit is connected with the power supply end of the display chip, the first power supply conversion circuit is provided with an enabling end connected with the signal output end of the second switch, the enabling end can be activated when a control signal output by the control structure meets the requirement, and the first power supply conversion circuit can supply power to the display chip through the output end of the first power supply conversion circuit after the enabling end of the first power supply conversion circuit is activated;
the signal output end of the display chip is connected with the signal input end of the first switch, and the display chip is used for controlling the on-off of the first switch;
and the signal output by the second branch circuit to the signal input end of the second switch does not meet the activation requirement of the enabling end.
2. The power supply circuit of claim 1, wherein the at least one control structure further comprises a main control chip connected to the display chip, the power supply circuit comprising a first regulating resistor and a first node;
one end of the first adjusting resistor is connected with the second branch circuit, and the other end of the first adjusting resistor is connected with the first node;
the first node is connected with the signal input end of the second switch and is also connected with the signal output end of the main control chip.
3. The power supply circuit of claim 1, wherein said at least one control structure further comprises a global control switch, said power supply circuit further comprising a second regulating resistor and a second node;
one end of the second adjusting resistor is connected with the second branch circuit, and the other end of the second adjusting resistor is connected with the second node;
the second node is connected with the signal input end of the second switch and is also connected with the signal output end of the master control switch.
4. The power supply circuit according to claim 2 or 3, wherein the power supply circuit further comprises a third adjusting resistor and a third node;
one end of the third adjusting resistor is connected with the second branch circuit, and the other end of the third adjusting resistor is connected with the third node;
the third node is connected with the signal input end of the second switch and is also connected with the signal output end of the display chip.
5. The power supply circuit of claim 1, wherein the second switch is an inverter.
6. The power supply circuit according to claim 1, further comprising a second power conversion circuit, wherein one end of the second power conversion circuit is connected to the second branch circuit, and the other end of the second power conversion circuit is connected to the power terminal and the signal input terminal of the second switch, respectively.
7. The power supply circuit of claim 1, wherein the household appliance further comprises an external load, the power supply circuit further comprising a third power conversion circuit; wherein the content of the first and second substances,
the output end of the first power supply switching circuit is connected with an external load through a first power supply branch circuit and is connected with the third power supply switching circuit through a second power supply branch circuit, and the first power supply branch circuit is connected with the second power supply branch circuit in parallel;
the third power conversion circuit is connected with the power end of the display chip.
8. The household appliance is characterized by comprising a display, a display chip, at least one control structure and a power supply circuit, wherein the power supply circuit comprises a power supply circuit, a first switch, a second switch and a first power supply conversion circuit; wherein:
the power supply circuit is provided with a first branch circuit, a second branch circuit and a third branch circuit;
the first branch is connected with the display through the first switch;
the second branch circuit is respectively connected with a power supply end of the second switch and a signal input end of the second switch;
the signal input end of the second switch is also connected with the at least one control structure and can receive a control signal of the at least one control structure;
the third branch circuit is connected with the input end of the first power supply conversion circuit;
the output end of the first power supply conversion circuit is connected with the power supply end of the display chip, the first power supply conversion circuit is provided with an enabling end connected with the signal output end of the second switch, the enabling end can be activated when the signal output by the second switch meets the requirement, and the first power supply conversion circuit can supply power to the display chip through the output end of the first power supply conversion circuit after the enabling end of the first power supply conversion circuit is activated;
the signal output end of the display chip is connected with the signal input end of the first switch, and the display chip is used for controlling the on-off of the first switch;
and the signal output by the second branch circuit to the signal input end of the second switch does not meet the activation requirement of the enabling end.
9. The household appliance according to claim 8, wherein said at least one control structure comprises a main control chip, said household appliance further comprising a power supply filter rectification circuit and an isolation circuit;
the power supply filtering and rectifying circuit is respectively connected with the main control chip and the isolation circuit;
the main control chip is connected with the signal input end of the second switch and the display chip through the isolation circuit, and the isolation circuit is further connected with the power circuit.
10. A control method of a home appliance, for the home appliance according to claim 8 or 9, characterized by comprising:
sending an activation signal to a signal input end of the second switch according to a working instruction received by the household appliance to activate the enabling end, so that the power supply circuit supplies power to the display chip through a third branch circuit;
controlling the display chip to send a closing signal to the first switch so that the power supply circuit supplies power to the display through the first branch circuit;
and controlling the display chip to continuously send an activation signal to the signal input end of the second switch so as to continuously activate the enabling end.
CN202110865574.5A 2021-07-29 2021-07-29 Power supply circuit, household appliance and control method for household appliance Active CN113612369B (en)

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CN202110865574.5A CN113612369B (en) 2021-07-29 2021-07-29 Power supply circuit, household appliance and control method for household appliance
PCT/CN2022/104686 WO2023005643A1 (en) 2021-07-29 2022-07-08 Household electrical appliance and control method therefor

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WO2023005643A1 (en) * 2021-07-29 2023-02-02 海信冰箱有限公司 Household electrical appliance and control method therefor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103677034A (en) * 2012-09-03 2014-03-26 珠海格力电器股份有限公司 Standby circuit of household appliance and standby control method
CN210111683U (en) * 2019-07-04 2020-02-21 深圳市嘉利达专显科技有限公司 Circuit for reducing standby power of medical display powered by external power supply
CN213338362U (en) * 2020-09-07 2021-06-01 海信（山东）冰箱有限公司 Household appliance

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103677034A (en) * 2012-09-03 2014-03-26 珠海格力电器股份有限公司 Standby circuit of household appliance and standby control method
CN210111683U (en) * 2019-07-04 2020-02-21 深圳市嘉利达专显科技有限公司 Circuit for reducing standby power of medical display powered by external power supply
CN213338362U (en) * 2020-09-07 2021-06-01 海信（山东）冰箱有限公司 Household appliance

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