CN111998482A - Switch control circuit and household electrical appliance - Google Patents

Switch control circuit and household electrical appliance Download PDF

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Publication number
CN111998482A
CN111998482A CN202010845711.4A CN202010845711A CN111998482A CN 111998482 A CN111998482 A CN 111998482A CN 202010845711 A CN202010845711 A CN 202010845711A CN 111998482 A CN111998482 A CN 111998482A
Authority
CN
China
Prior art keywords
switching device
switch
load
powered
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010845711.4A
Other languages
Chinese (zh)
Inventor
余根
奚洋
石毅
刘文登
蒋成标
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
Hefei Midea Heating and Ventilating Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
Hefei Midea Heating and Ventilating Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Midea Group Co Ltd, Hefei Midea Heating and Ventilating Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN202010845711.4A priority Critical patent/CN111998482A/en
Publication of CN111998482A publication Critical patent/CN111998482A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0003—Exclusively-fluid systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
    • H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)

Abstract

The invention provides a switch control circuit and household electrical appliance, wherein the switch control circuit comprises: the first switch device is used for being connected with a first load; the second switching device is used for being connected with a second load, the second switching device is connected with the first switching device, and the second switching device is suitable for being controlled by the first switching device in a linkage mode; the third switch device is connected with the second switch device, the linkage control of the first switch device and the second switch device can be cut off when the third switch device is switched on or switched off, the electric auxiliary heating device is switched on in a linkage mode when the fan is switched on, the step that a user actively switches on the electric auxiliary heating device is saved, the convenience of the user in using the household appliance is improved, and when the third switch device is switched off, the first switch device cannot carry out linkage control on the second switch device, so that the second switch device can be switched on or switched off according to the requirements of the user.

Description

Switch control circuit and household electrical appliance
Technical Field
The invention belongs to the technical field of household appliances, and particularly relates to a switch control circuit and a household appliance.
Background
The new fan is used for sending outdoor fresh air into indoorly, but under the lower circumstances of outdoor temperature in winter, the indoor temperature reduction that can cause is introduced to outdoor new trend, and the user need open the electric auxiliary heating device in order to improve the new trend temperature that gets into indoorly, and the mode that all needs the user to open the electric auxiliary heating device when opening new fan each time has brought very big inconvenience for the user, is difficult to improve user experience.
Disclosure of Invention
The present invention is directed to solving one of the technical problems of the prior art or the related art.
In view of the above, a first aspect of the present invention provides a switch control circuit, including: a first switching device for connection with a first load; a second switching device for connection with a second load, the second switching device being connected with the first switching device, the second switching device being configured and adapted to be controlled by the first switching device in a coordinated manner; and the third switching device is connected with the second switching device, and the connection or disconnection of the third switching device can cut off the linkage control of the first switching device and the second switching device.
The switch control circuit provided by the invention comprises: a first switch device, a second switch device and a third switch device, wherein the first switch device is used for connecting with a first load, the first switch device is closed to enable the first load to work in an electrifying way, the first switch device is opened to enable the first load to be powered off, the electrifying or powering-off control of the first load is realized, the second switch device is used for connecting with a second load, similarly, the second switch device is closed to enable the second load to work in an electrifying way, the second switch device is opened to enable the second load to be powered off, the on-off or powering-off control of the second load is realized, the second switch device is connected with the first switch device, and the second switch device is configured and suitable for being controlled by the first switch device in a linkage way, that is, the on-state change of the first switch device can drive the on-state change of the second switch device, for example, when the first switch device is switched on, the second switch device is controlled to be switched on, when the second switch is switched off, the second switch device is controlled to be switched off, so that linkage of the second switch device and the first switch device is realized, the first load can be set into the fan, the second load is set into the electric auxiliary heating device, when the first switch device is switched on, the fan is switched on and the second switch device is switched off, outdoor fresh air can be sucked into a room by the fan, the second switch device is switched off to enable the electric auxiliary heating device to be switched on, the electric auxiliary heating device can heat the sucked indoor fresh air, so that the indoor temperature is prevented from being reduced, when the fan is switched on, the electric auxiliary heating device is switched on in a linkage manner, the step of actively switching on the electric auxiliary heating device by a user is saved, the convenience of the user when the user uses the household appliance is improved, and the use.
The third switch device is connected with the second switch device, the second switch device can cut off the linkage control of the first switch device and the second switch device, for example, when the third switch device is closed, the first switch device can realize the linkage control of the second switch device, when the third switch device is opened, the first switch device can not carry out the linkage control of the second switch device, thereby the second switch device can be closed or opened according to the needs of users, for example, in summer, the outdoor temperature is high, only outdoor fresh air needs to be sucked into the room, the fresh air does not need to be heated, at the moment, the fan and the electric auxiliary heating device do not need to carry out the linkage control, at the moment, the third switch device can be opened, so when the fan is opened, the electric auxiliary heating device can not be synchronously opened, when the outdoor temperature is low, the third switch device can be closed, therefore, when the fan is started, the electric auxiliary heating device is synchronously started, the heating function of fresh air is realized, a user can start or close the third switching device according to the self requirement and the combination of outdoor environment temperature to start or close the linkage function, and the convenience of the user for using the product is further improved.
Moreover, when the second switch device is damaged, for example, when the contact of the second switch device is bonded, the second switch device can be powered on to enable the electric auxiliary heating device to be powered on when the first switch device is not started, and by adding the third switch device, even if the contact of the second switch device is bonded, a user can control the electric auxiliary heating device to be powered off in a mode of disconnecting the third switch device, so that the use safety of the product is improved.
In addition, according to the switch control circuit in the above technical solution provided by the present invention, the following additional technical features may be further provided:
in one possible design, the second switching device includes: the control part is connected with the first switching device, and the first switching device can control the control part to be powered on or powered off; the control part can control the switch part to be switched on or off when the control part is powered on or powered off so as to enable the second load to be powered on or powered off; the third switching device can control the control part to be powered on or powered off; or the third switching device can control the circuit where the switching part is located to form a path or be an open circuit.
In the design, the second switch device comprises a control part and a switch part, the control part is connected with the first switch device, when the first switch device is closed, the control part can be powered on, when the second switch device is disconnected, the control part is powered off, the control part is controlled to be powered on and powered off through the action of the first switch device, the switch part is connected with the second load, the control part can control the on or off of the switch part, specifically, when the control part is powered on, the switch part is closed, so that the second load connected with the switch part is powered on to work, when the control part is powered off, the switch part is disconnected, the second load connected with the switch part is powered off, the linkage control of the first switch device and the second switch device is realized, and the use convenience of a user on a product is improved.
Specifically, the second switch device may be set to be a relay or an optical coupler, for example, the second switch device is a relay, the control portion is a coil of the relay, the switch portion is a normally open contact of the relay, the coil is electrified to attract the normally open contact, so that the normally open contact is closed, and therefore the second load on one loop with the normally open contact is electrified.
Taking the second switching device as an example of a relay, the control part is on the power supply loop, the switching part is on the load loop, and the third switching device may be arranged on the power supply loop or the load loop. The third switching device is arranged on the power supply loop and can control the control part to be powered on or powered off, for example, the first switching device is closed, the third switching device is disconnected, the control loop where the control part is located cannot form a closed loop, the control part cannot be powered on, so that the switch part cannot be controlled to be closed, when the first switching device is closed and the third switching device is also closed, the control loop where the control part is located is a closed loop, the control part is powered on, the control part is further controlled to be closed, and the second load is powered on.
Or the third switching device is arranged on the load circuit, the third switching device can control the switching part to be switched on or switched off, for example, the first switching device is switched on and the third switching device is switched off, although the control part is powered on and the switching part is controlled to be switched on, the load circuit where the switching part is located cannot form a closed circuit and cannot enable the second load to be powered on, and when the first switching device is switched on and the third switching device is switched off, the load circuit where the switching part is located is a closed circuit, so that the second load can be powered on to work, and the convenience of a user for using a product is effectively improved.
In one possible design, the first switching device includes: the input end is connected with a power supply end; the first output end is connected with a first load; and the second output end is connected with the control part, and the input end can be conducted with the first output end and the second output end.
In this design, the first switching device includes: the input, first output and second output, the input is connected with the power end, the input can switch on with first output and second output simultaneously, that is to say, input and first output switch on, make first load the work of getting electric, input and second output switch on simultaneously, make the linkage of second switching device closed, thereby make the work of getting electric of second load, the function of first load and the work of second load linkage has been realized, do not need the user to initiatively open the electric auxiliary heating device, improve the user and to product convenience of use.
In one possible design, the switching section includes: the input end of the switch part is connected with a power supply end; and the output end of the switching part is connected with the first end of the third switching device, and the second end of the third switching device is connected with the second load.
In this design, the switching section includes: switch portion input and switch portion output, the control division includes: a control part input end and a control part output end, the control part input end is connected with the second output end, the control part output end is connected with the power supply end, the switch part input end is connected with the power supply end, the switch part output end is connected with the third switching device, when the input end is conducted with the second output end, the control part is electrified and can control the switch part to be closed, the second load is able to be powered when the third switching device is closed, and powered when the third switching device is open, the second load can not be electrified to work even if the switch part is closed, the linkage of the first switch device and the second switch device is cut off, the control initiative of a user on a product is improved, in addition, the input end of the switch part is connected with a power supply end, therefore, the second load and the first switching device are in parallel connection in the circuit, the second load shunts current, and damage caused by overlarge current flowing through the first switching device is avoided.
In one possible design, the control portion includes: the input end of the control part is connected with the second output port of the first switching device; and the output end of the control part is connected with the first end of the third switching device, and the second end of the third switching device is connected with a power supply end.
In this design, the control section includes: control part input and control part output, the switching part includes: the input end of the switch part is connected with the output end of the switch part, the input end of the control part is connected with the second output end, the output end of the control part is connected with the third switching device, the input end of the switch part is connected with the power supply end, the output end of the switch part is connected with the second load, and under the condition that the third switching device is not closed, even if the input end and the second output end are conducted, because the loop where the control part is located is not a closed loop, the control part cannot be powered on, the linkage of the first switching device and the second switching device can be realized only by closing the third switching device by a user, and the control initiative of.
In one possible design, the switch control circuit further includes: a rectifier; the rectifier includes: the first port is connected with the second output end of the switching device; the second port is connected with the input end of the control part; the third port is connected with the output end of the control part; and the fourth port is connected with a power supply end.
In the design, the rectifier comprises a first port, a second port, a third port and a fourth port, the first port of the rectifier is connected with the second output end, the second port of the rectifier is connected with the input end of the control part, the rectifier can rectify current, so that alternating current flowing through the first switching device is converted into direct current after passing through the rectifier, the setting mode is suitable for the switching device with the second switching device suitable for being connected with the direct current, certainly, if the second switching device supports the flowing of the alternating current, the rectifier does not need to be arranged, and the third port and the fourth port of the rectifier are respectively connected with the output end of the control part and the power supply end, so that the direct current is converted into the alternating current, and the closed cycle of the current is realized.
In one possible design, the first output terminals are at least two; the first switch device is a knob switch, and an input end of the first switch device can be conducted with one of the at least two first output ends and the second output end.
In this design, rotary switch can have a plurality of output gears, through setting up a plurality of first outputs, can adjust the power of first load (fan), set up switch plectrum and rotatory plectrum in the wave band, rotatory plectrum can drive the switch plectrum and remove, rotate rotatory plectrum, the switch plectrum switches on input and second output, no matter input and which first output switch on, the second output can all make the control part electric, thereby realized as long as first switching device opens and just realize the linkage function to the second switching device.
In one possible embodiment, the control unit or the switching unit is connected to a third load; the control part is powered on or powered off so as to power on or power off the third load; or the switch part is closed or opened to power on or off the third load.
In the design, the control part and the switch part are connected with the third load, the control part is powered on, the third load is powered on or the switch part is closed, the third load is powered on, namely, the second load and the third load can be in a parallel connection relation, and the power-on or power-off of the third load cannot be influenced by the third switching device, so that the load which does not need to be actively controlled by a user can be used as the third load, and the diversity of products is improved.
A second aspect of the present invention provides a home appliance, comprising: the switch control circuit in any possible design in the above technical solution, therefore, the household electrical appliance provided by the invention has all the benefits of the switch control circuit provided in any possible design.
In one possible design, the first load is a fan; the second load includes an electrical auxiliary thermal device.
In the design, when the fan is started, the electric auxiliary heating device is started in a linkage manner, so that the step that a user actively starts the electric auxiliary heating device is saved, the convenience of the user in the use of the household appliance is improved, and the use experience of the user is improved.
In summer, the outdoor temperature is higher, only outdoor fresh air is needed to be sucked into a room at the moment, the fresh air does not need to be heated, the fan and the electric auxiliary heating device do not need to be subjected to linkage control at the moment, the third switching element can be disconnected, the electric auxiliary heating device cannot be synchronously opened when the fan is started, the third switching element can be closed when the outdoor temperature is lower in winter, the electric auxiliary heating device is synchronously opened when the fan is started, the heating function of the fresh air is realized, a user can open or close the third switching element according to the self requirement and the combination of the outdoor environment temperature to open or close the linkage function, and the convenience of the user for using the product is further improved.
In one possible design, the third load to which the switch control circuit can be connected is a sterilization assembly; the sterilization component is connected with the second switching device and the power supply end, and the second switching device is switched on or switched off so as to enable the sterilization component to be powered on or powered off.
In the design, the second switching device is switched on or switched off, so that the sterilization assembly is powered on or powered off, the power on or powered off of the sterilization assembly cannot be influenced by the third switching device, and the diversity of products is improved.
In one possible design, the third load to which the switch control circuit can be connected is a valve assembly; the home appliance further includes: the shell is provided with an air inlet; the valve plate is movably arranged on the shell and can open or close the air inlet; the valve assembly is connected with the second switching device and a power supply end, the second switching device is closed or opened, so that the valve assembly is powered on or powered off, and the valve assembly can control the valve plate to act.
In the design, the second switching device is switched on or off, so that the valve assembly is powered on or powered off, the power on or powered off of the valve assembly is not influenced by the third switching device, and the diversity of products is improved. The valve assembly is electrified to enable the valve plate to open the air inlet, fresh air can enter the room through the air inlet, the valve assembly is powered off to enable the valve plate to close the air inlet, the situation that leaves or birds and insects enter the shell to easily cause component damage when the fresh air function is not used is avoided, and the air inlet is required to be opened due to the fact that the fresh air function is started, so that the valve assembly is opened or closed without being affected by the fact that the third switching device is closed or opened.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic block diagram of a switch control circuit according to an embodiment of the present invention;
FIG. 2 shows a schematic block diagram of a switch control circuit according to another embodiment of the present invention;
FIG. 3 shows a schematic block diagram of a switch control circuit according to yet another embodiment of the present invention;
FIG. 4 is a schematic diagram of a switch control circuit according to yet another embodiment of the present invention;
FIG. 5 shows a schematic block diagram of a switch control circuit according to yet another embodiment of the present invention;
fig. 6 shows a schematic structural diagram of a mechanical panel switch according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Switch control circuits provided according to some embodiments of the present invention are described below with reference to fig. 1-6.
The first embodiment is as follows:
with reference to fig. 1 and 2, an embodiment of a first aspect of the present invention provides a switch control circuit, including: a first switching device K1, a second switching device K2 and a third switching device K3. The first switching device K1 is used for connecting with a first load M; the second switching device K2 is used for being connected with a second load RL2, the second switching device K2 is connected with the first switching device K1, and the second switching device K2 is configured and suitable for being controlled by the first switching device K1 in an interlocking mode; the third switching device K3 is connected to the second switching device K2, and the on or off of the third switching device K3 can cut off the coordinated control of the first switching device K1 and the second switching device K2.
The first switching device K1 is used to connect with the first load M, the first switching device K1 is closed to enable the first load M to work by electrifying, and the first switching device K1 is opened to disable the first load M, so as to control the electrification or the outage of the first load M. The second switching device K2 is used to connect with the second load RL2, and similarly, the second switching device K2 is closed to enable the second load RL2 to operate by being energized, and the second switching device K2 is opened to disable the second load RL2, so that on/off or power off control of the second load RL2 is realized.
The second switching device K2 is connected to the first switching device K1, and the second switching device K2 is configured to be cooperatively controlled by the first switching device K1. That is to say, the conducting state change of the first switch device K1 can drive the conducting state of the second switch device K2 to change, for example, when the first switch device K1 is conducting, the second switch device K2 is controlled to be conducting, and when the second switch is off, the second switch device K2 is controlled to be off, so that the linkage of the second switch device K2 and the first switch device K1 is realized. The first load M may be set as a fan, the second load RL2 may be set as an electric auxiliary device, and when the first switching device K1 is closed, the fan is powered on and the second switching device K2 is closed. The fan can be indoor with outdoor fresh air suction, and second switching device K2 is closed and makes the circular telegram of electric auxiliary heating device open, and electric auxiliary heating device can heat the fresh air that inhales indoor to avoid indoor temperature to reduce. When the fan is started, the electric auxiliary heating device is started in a linkage mode, the step that a user actively starts the electric auxiliary heating device is omitted, convenience of the user in use of the household appliance is improved, and use experience of the user is improved.
The third switching device K3 is connected to the second switching device K2, and the second switching device K2 is capable of interrupting the coordinated control of the first switching device K1 and the second switching device K2. For example, when the third switching device K3 is closed, the first switching device K1 enables coordinated control of the second switching device K2. When the third switching device K3 is turned off, the first switching device K1 cannot perform coordinated control of the second switching device K2, so that the second switching device K2 can be turned on or off according to the user's needs. For example, in summer, the outdoor temperature is high, and at this time, only outdoor fresh air needs to be sucked into a room, and the fresh air does not need to be heated, and at this time, the fan and the electric auxiliary heating device do not need to be subjected to linkage control, and the third switching device K3 can be turned off, so that when the fan is turned on, the electric auxiliary heating device is not turned on synchronously.
When the outdoor temperature is lower in winter, the third switching device K3 can be closed, so that when the fan is started, the electric auxiliary heating device is synchronously started, the heating function of fresh air is realized, a user can start or close the linkage function by starting or closing the third switching device K3 according to the self requirement and combining the outdoor environment temperature, and the convenience of the user in using the product is further improved.
Moreover, when the second switching device K2 is damaged, for example, when the contact of the second switching device K2 is bonded, and the first switching device K1 is not turned on, the second switching device K2 can be powered on to enable the electric auxiliary heating device to be powered on, and by adding the third switching device K3, even if the contact of the second switching device K2 is bonded, a user can control the electric auxiliary heating device to be powered off in a mode of turning off the third switching device K3, so that the use safety of the product is improved.
Example two:
with reference to fig. 1 and fig. 2, in the first embodiment, the second switching device K2 includes: the control part is connected with a first switching device K1, and the first switching device K1 can control the control part to be powered on or powered off; the switch part is connected with the second load RL2, and the control part can control the switch part to be switched on or off when the switch part is powered on or powered off so as to enable the second load RL2 to be powered on or powered off; the third switching device K3 can control the control section to be powered on or powered off; or the third switching device K3 can control the line on which the switching section is located to make a path or to break a path.
In this embodiment, the second switching device K2 includes a control section and a switching section, the control section and the first switching device K1 are connected, the control section can be energized when the first switching device K1 is closed, and the control section is de-energized when the second switching device K2 is open. The control of turning on and off the control section is realized by the operation of the first switching device K1. The switch part is connected with the second load RL2, and the control part can control the closing or opening of the switch part, specifically, when the control part is electrified, the switch part is closed, so that the second load RL2 connected with the switch part is electrified to work, when the control part is powered off, the switch part is opened, and the second load RL2 connected with the switch part is powered off, thereby realizing the linkage control of the first switch device K1 and the second switch device K2, and improving the use convenience of a user for a product.
Specifically, the second switching device K2 may be provided as a relay or an optocoupler, for example, the second switching device K2 may be a relay, the control unit may be a coil of the relay, the switching unit may be a normally open contact of the relay, and the coil is energized to attract the normally open contact, so that the normally open contact is closed, and thereby the second load RL2 on one loop with the normally open contact is energized.
Taking the second switching device K2 as an example of a relay, the control unit is on the supply circuit, the switching unit is on the load circuit, and the third switching device K3 may be provided on the supply circuit or the load circuit. The third switching device K3 is disposed on the power supply circuit, the third switching device K3 can control the control portion to be powered on or powered off, for example, the first switching device K1 is closed, the third switching device K3 is opened, the control circuit where the control portion is located cannot form a closed circuit, the control portion cannot be powered on, and therefore the switch portion cannot be controlled to be closed, when the first switching device K1 is closed and the third switching device K3 is also closed, the control circuit where the control portion is located is a closed circuit, the control portion is powered on, and then the switch portion is controlled to be closed, and the second load RL2 is powered on.
Or the third switching device K3 is disposed on the load circuit, the third switching device K3 can control the circuit where the switch portion is located to form a path or be an open circuit, for example, the first switching device K1 is closed and the third switching device K3 is open, although the control portion is powered on and controls the switch portion to be closed, the load circuit where the switch portion is located cannot form a closed circuit and cannot enable the second load RL2 to be powered on, and when the first switching device K1 is closed and the third switching device K3 is closed, the load circuit where the switch portion is located is a closed circuit, so that the second load RL2 can be powered on to work, and convenience of users in using products is effectively improved.
Further, the first switching device K1 includes: the input end is connected with a power supply end; the first output end is connected with a first load M; the second output end is connected with the control part, and the input end can be conducted with the first output end and the second output end.
The input end can switch on with first output and second output simultaneously, that is to say, input and first output switch on for first load M gets electric work, and input and second output switch on simultaneously for second switching device K2 linkage is closed, thereby makes second load RL2 get electric work, has realized the function of first load M and second load RL2 linkage work, does not need the user to initiatively open electric auxiliary heating device, improves the user and to product convenience of use.
Example three:
as shown in fig. 1, in a specific embodiment of the second embodiment, the switching section includes: the input end of the switching part is connected with a power supply end; the output terminal of the switching section is connected to a first terminal of a third switching device K3, and a second terminal of the third switching device K3 is connected to a second load RL 2.
In this embodiment, the switching section includes: switch portion input and switch portion output, the control division includes: the input end of the control part is connected with the second output end, the output end of the control part is connected with the power supply end, the input end of the switch part is connected with the power supply end, the output end of the switch part is connected with the third switching device K3, when the input end is connected with the second output end, the control part is powered on, the control part can control the switch part to be closed, when the third switching device K3 is closed, the second load RL2 can be powered on, when the third switching device K3 is disconnected, the second load RL2 can not be powered on to work even if the switch part is closed, the linkage of the first switching device K1 and the second switching device K2 is cut off, the control initiative of a user on a product is improved, in addition, the input end of the switch part is connected with the power supply end, so that the second load RL2 and the first switching device K1 are in a parallel connection relation in a circuit, and the second load RL2 shunts current, the current flowing through the first switching device K1 is prevented from being too large to cause damage.
Referring to fig. 1 and 2, in another specific example of the second embodiment, the control unit includes: the input end of the control part is connected with the second output port of the first switching device K1; the control unit output terminal is connected to a first terminal of the third switching device K3, and a second terminal of the third switching device K3 is connected to a power supply terminal.
In this embodiment, the control section includes: control part input and control part output, the switching part includes: the input end of the switch part is connected with the output end of the switch part, the input end of the control part is connected with the second output end, the output end of the control part is connected with the third switching device K3, the input end of the switch part is connected with a power supply end, the output end of the switch part is connected with the second load RL2, and under the condition that the third switching device K3 is not closed, even if the input end is conducted with the second output end, because the loop where the control part is located is not a closed loop, the control part cannot be powered on, the linkage of the first switching device K1 and the second switching device K2 can be realized only by closing the third switching device K3 by a user, and the control initiative of the.
In yet another embodiment, as shown in fig. 5, a control input terminal may be connected to a first terminal of a third switching device K3, and a second terminal of the third switching device K3 is connected to a second output port of the first switching device K1. Under the condition that the third switching device K3 is not closed, even if the input end and the second output end are conducted, the control part cannot be powered because the loop where the control part is located is not a closed loop, and the linkage of the first switching device K1 and the second switching device K2 can be realized only by closing the third switching device K3 by a user, so that the control initiative of the user on a product is improved.
Example four:
as shown in fig. 1, in the above embodiment, the switch control circuit further includes: a rectifier U; the rectifier U includes: the first port is connected with the second output end of the switching device; the second port is connected with the input end of the control part; the third port is connected with the output end of the control part; and the fourth port is connected with a power supply end.
In this embodiment, the rectifier U includes a first port, a second port, a third port and a fourth port, the first port of the rectifier U is connected to the second output terminal, the second port of the rectifier U is connected to the input terminal of the control portion, the rectifier U can rectify current, so that ac current flowing through the first switching device K1 becomes dc current after passing through the rectifier U, this arrangement is suitable for the switching device with the second switching device K2 suitable for passing dc current, of course, if the second switching device K2 supports flowing ac current, the rectifier U does not need to be arranged, and the third port and the fourth port of the rectifier U are respectively connected to the output terminal and the power supply terminal of the control portion, so that dc current becomes ac current again, thereby implementing a closed cycle of current.
Example five:
in the above embodiment, as shown in fig. 1 and fig. 6, there are at least two first output ends; the first switching device K1 is a rotary switch, and an input terminal of the first switching device K1 can be conducted with one of the at least two first output terminals and the second output terminal.
In this embodiment, knob switch can have a plurality of output gears, through setting up a plurality of first output ends, can adjust the power of first load M (fan), set up switch plectrum and rotatory plectrum in the wave band, rotatory plectrum can drive the switch plectrum and remove, rotate rotatory plectrum, the switch plectrum switches on input and second output, no matter input and which first output switch on, two at least second outputs all can make the control part electric, thereby realized as long as first switching device K1 opens and just realize the linkage function to second switching device K2.
Example six:
in the above embodiment, as shown in fig. 1 and 4, the control portion or the switch portion is used to connect to the third load RL 3; the control part is powered on or powered off so as to power on or power off the third load RL 3; or the switching section is closed or opened to power on or off the third load RL 3.
In this embodiment, the control unit and the switch unit are connected to the third load RL3, and the control unit is powered on, the third load RL3 is powered on or the switch unit is closed, and the third load RL3 is powered on, that is, the second load RL2 and the third load RL3 may be in a parallel relationship, and the power on or off of the third load RL3 is not affected by the third switching device K3, so that a load which does not need to be actively controlled by a user can be used as the third load RL3, and the diversity of products is improved.
Example seven:
an embodiment of a second aspect of the present invention provides a home appliance, including: the switch control circuit in any of the above embodiments, therefore, the household electrical appliance provided by the present invention has all the benefits of the switch control circuit in any of the above embodiments.
Example eight:
as shown in fig. 1, on the basis of the seventh embodiment, the first load M is a fan; the second load RL2 includes an electric auxiliary heating device.
In the embodiment, when the fan is started, the electric auxiliary heating device is started in a linkage manner, so that the step that a user actively starts the electric auxiliary heating device is saved, the convenience of the user in using the household appliance is improved, and the use experience of the user is improved.
In summer, the outdoor temperature is high, only outdoor fresh air needs to be sucked into a room at the moment, the fresh air does not need to be heated, the fan and the electric auxiliary heating device do not need to be subjected to linkage control at the moment, the third switching device K3 can be disconnected, the electric auxiliary heating device cannot be synchronously started when the fan is started, the third switching device K3 can be closed when the outdoor temperature is low in winter, the electric auxiliary heating device is synchronously started when the fan is started, the heating function of the fresh air is realized, a user can start or close the third switching device K3 according to the self requirement and the combination of the outdoor environment temperature to start or close the linkage function, and the convenience of the user in using the product is further improved.
Example nine:
in a specific embodiment based on the seventh embodiment and the eighth embodiment, as shown in fig. 1 and 4, the third load RL3 that the switch control circuit can connect is a sterilization assembly; the sterilizing assembly is connected with the second switching device K2 and a power supply terminal, and the second switching device K2 is closed or opened so as to power on or power off the sterilizing assembly.
In this embodiment, the second switching device K2 is turned on or off, so that the sterilization assembly is powered on or off, and the power on or off of the sterilization assembly is not affected by the third switching device K3, thereby improving the diversity of products.
In another specific embodiment based on embodiment seven and embodiment eight, the third load RL3 that the switch control circuit can connect is a valve assembly; the home appliance further includes: the shell is provided with an air inlet; the valve plate is movably arranged on the shell and can open or close the air inlet; the valve assembly is connected with a second switching device K2 and a power supply end, and the second switching device K2 is closed or opened, so that the valve assembly is powered on or powered off and can control the valve plate to act.
In this embodiment, the second switching device K2 is turned on or off, so that the valve assembly is powered on or off, and the power on or off of the valve assembly is not affected by the third switching device K3, thereby improving the diversity of products. The valve assembly is electrified to enable the valve plate to open the air inlet, fresh air can enter the room through the air inlet, the valve assembly is powered off to enable the valve plate to close the air inlet, the situation that leaves or birds and insects enter the shell to easily cause component damage when the fresh air function is not used is avoided, and the air inlet is required to be opened due to the fact that the fresh air function is started, so that the opening or closing of the valve assembly is not affected by the closing or opening of the third switching device K3.
Example ten:
the household electrical appliance further comprises a mechanical panel switch, the first switch device K1, the second switch device K2 and the third switch device K3 are arranged on the mechanical panel switch, the mechanical panel switch also has the functions of electric auxiliary heat output linkage control and sterilization module control on the basis of adjusting the gear of the rotating speed of the fan, and meanwhile, the knob switch linkage relay is adopted to control linkage output, so that a larger electrical appliance load can be driven. The connection between the rectifier U and the third switching device may be implemented by a mechanical panel switch, or the connection between the rectifier U and the third switching device K3 may be implemented by an external connection line as shown in fig. 3, the connection between the power source terminal and the output terminal of the switching unit may be implemented by a mechanical panel switch, or the connection between the power source terminal L and the output terminal of the switching unit may be implemented by an external connection line as shown in fig. 3
The user can independently switch on and off the work of the electric auxiliary heating module according to the actual use condition, and the air valve and the sterilization module are linked for application; the high-power load can be directly connected to the output port of the interlocking power supply, so that the application range of the mechanical panel is expanded, and an additional control switch is not needed.
The mechanical panel consists of a left knob switch and a right common panel switch, wherein the knob switch adopts a knob switch, the 0 position represents turn-off, the 1 position is a low wind gear, the 2 position is a medium wind gear, and the 3 position is a high wind gear; when the knob switch outputs three-gear independent output normally, one signal is output in a linkage manner; when the knob switch is normally closed, the knob switch is in the 0 position, and the interlocking signal is not output by the power supply; when the knob switch rotates to the 1 gear, the 2 gear or the 3 gear, the interlocking signals can be output, namely, as long as the fan is started, the interlocking nodes output the power signals.
The U is a power supply conversion module and is responsible for converting strong current into weak current to control the relay, when a power supply is switched and output to different gears of the fan through a knob as shown in fig. 6, the interlocking output of a knob switch simultaneously outputs an output power supply to a power supply module of the rectifier U, the power supply module converts an alternating current power supply into relay control voltage, and the relay closes the output power supply to realize the interlocking output of the power supply; only when the fan is started, the auxiliary output is power output; when the fan is closed, the relay does not have control voltage, the relay is disconnected, and no power supply is output.
During actual installation, different gears of the fan are connected to high wind, medium wind and low wind outputs, a normally open contact of the relay is attracted, chain outputs are connected to a second output end of a panel switch K1, the second output end is connected to electric auxiliary heat, an electric auxiliary heat power supply is controlled by a panel switch K1, and when K1 is closed, the electric auxiliary heat works; by using the switching control of the relay, the condition that a knob switch cannot drive a high-power load is avoided, and the type of the relay can be freely selected according to the load current condition, such as 10 amperes, 16 amperes and the like.
The sterilization module is connected to the output end of the interlocking switch part, so that the fan and the sterilization module work in an interlocking manner, and the sterilization module is started when the fan is started.
The electric auxiliary heating module can be started and stopped with the fan in a linkage manner, and can be manually switched on and off through a panel switch K1; the user can manually turn on and off when the outdoor air temperature is low in winter.
By changing the connected load, the air valve and the electric auxiliary heating module can be interlocked to work, and the panel switch can be vacated to be connected with other control loads by only interlocking the electric auxiliary heating output.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A switch control circuit, comprising:
a first switching device for connection with a first load;
a second switching device for connection with a second load, the second switching device being connected with the first switching device, the second switching device being adapted to be controlled by the first switching device in a coordinated manner;
and the third switching device is connected with the second switching device, and the connection or disconnection of the third switching device can cut off the linkage control of the first switching device and the second switching device.
2. The switch control circuit of claim 1, wherein the second switching device comprises:
the control part is connected with the first switching device, and the first switching device can control the control part to be powered on or powered off;
the control part can control the switch part to be switched on or off when the control part is powered on or powered off so as to enable the second load to be powered on or powered off;
the third switching device can control the control part to be powered on or powered off; or
The third switching device can control a line where the switching part is located to form a path or be an open circuit.
3. The switch control circuit of claim 2, wherein the first switching device comprises:
the input end is connected with a power supply end;
a first output terminal connected to the first load;
and the input end can be conducted with the first output end and the second output end.
4. The switch control circuit according to claim 3, wherein the switching section includes:
the input end of the switch part is connected with the power supply end;
and the output end of the switching part is connected with the first end of the third switching device, and the second end of the third switching device is connected with the second load.
5. The switch control circuit according to claim 3, wherein the control section includes:
the input end of the control part is connected with the second output port of the first switching device;
and the output end of the control part is connected with the first end of the third switching device, and the second end of the third switching device is connected with the power supply end.
6. The switch control circuit according to claim 4 or 5, further comprising:
a rectifier;
the rectifier includes:
a first port connected to a second output terminal of the switching device;
the second port is connected with the input end of the control part;
the third port is connected with the output end of the control part;
and the fourth port is connected with the power supply end.
7. The switch control circuit of claim 3,
the number of the first output ends is at least two;
the first switch device is a rotary switch, and the input end of the first switch device can be conducted with one of the at least two first output ends and the second output end.
8. The switch control circuit according to claim 2, wherein the control section or the switch section is configured to be connected to a third load;
the control part is powered on or powered off so as to power on or power off the third load; or
The switching part is closed or opened to power on or off the third load.
9. A household appliance comprising a switch control circuit according to any one of claims 1 to 8.
10. The home device of claim 9,
the first load is a fan;
the second load includes an electrical auxiliary thermal device.
11. The household appliance according to claim 9 or 10, wherein the third load to which the switch control circuit can be connected is a sterilization component;
the sterilization assembly is connected with the second switching device and a power supply end, and the second switching device is switched on or switched off so as to enable the sterilization assembly to be powered on or powered off.
12. The household electrical appliance according to claim 9 or 10, wherein the third load to which the switch control circuit can be connected is a valve assembly;
the home appliance device further includes:
the shell is provided with an air inlet;
the valve plate is movably arranged on the shell and can open or close the air inlet;
the valve assembly is connected with the second switching device and a power supply end, the second switching device is closed or opened, so that the valve assembly is powered on or powered off, and the valve assembly can control the valve plate to act.
CN202010845711.4A 2020-08-20 2020-08-20 Switch control circuit and household electrical appliance Pending CN111998482A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010845711.4A CN111998482A (en) 2020-08-20 2020-08-20 Switch control circuit and household electrical appliance

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Application Number Priority Date Filing Date Title
CN202010845711.4A CN111998482A (en) 2020-08-20 2020-08-20 Switch control circuit and household electrical appliance

Publications (1)

Publication Number Publication Date
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201488158U (en) * 2009-08-05 2010-05-26 深圳市联创电器有限公司 Air-conditioning fan using mechanical keys to control operation of circuit
CN202769869U (en) * 2012-06-27 2013-03-06 刘华荣 Multifunctional high energy-saving fresh air system of linkage air conditioner
US20160329846A1 (en) * 2013-07-02 2016-11-10 Mitsubishi Electric Corporation Backflow preventing device, power conversion apparatus, and refrigerating and air-conditioning apparatus
CN210892025U (en) * 2019-09-26 2020-06-30 广东绿岛风空气系统股份有限公司 Automatic control new fan

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201488158U (en) * 2009-08-05 2010-05-26 深圳市联创电器有限公司 Air-conditioning fan using mechanical keys to control operation of circuit
CN202769869U (en) * 2012-06-27 2013-03-06 刘华荣 Multifunctional high energy-saving fresh air system of linkage air conditioner
US20160329846A1 (en) * 2013-07-02 2016-11-10 Mitsubishi Electric Corporation Backflow preventing device, power conversion apparatus, and refrigerating and air-conditioning apparatus
CN210892025U (en) * 2019-09-26 2020-06-30 广东绿岛风空气系统股份有限公司 Automatic control new fan

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