CN105785879A - Door switch circuit used for household appliances and the household appliances - Google Patents
Door switch circuit used for household appliances and the household appliances Download PDFInfo
- Publication number
- CN105785879A CN105785879A CN201610284572.6A CN201610284572A CN105785879A CN 105785879 A CN105785879 A CN 105785879A CN 201610284572 A CN201610284572 A CN 201610284572A CN 105785879 A CN105785879 A CN 105785879A
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- Prior art keywords
- door
- home appliance
- resistance
- gate
- switch
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- 238000004851 dishwashing Methods 0.000 claims description 8
- 230000008929 regeneration Effects 0.000 claims description 4
- 238000011069 regeneration method Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0049—Detection or prevention of malfunction, including accident prevention
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
The invention discloses a door switch circuit used for household appliances and the household appliances. The door switch circuit comprises a door switch, a door switch detection circuit and a controller, wherein one end of the door switch is connected to a direct current control power supply and the other end is connected to a weak current control loop of each controllable switch; the door switch responds to door opening or door closing motion of the household appliances; an input terminal of the door switch detection circuit is connected to the other end of the door switch and is used for detecting a state of the door switch so as to acquire the door opening or door closing motion of the household appliances; an input terminal of the controller is connected to an output terminal of the door switch detection circuit; a plurality of control output terminals of the controller are correspondingly connected to the weak current control loop of each controllable switch; when determining that the door of each household appliance is opened, the controller makes each controllable switch disconnect through controlling the weak current control loop of each controllable switch; and when the door of each household appliance is opened, the door switch is in a disconnected state so that the weak current control loop of each controllable switch is in an outage state and each controllable switch is forced to be disconnected.
Description
Technical field
The present invention relates to household electrical appliance technical field, particularly to a kind of door switch circuit for home appliance and a kind of home appliance.
Background technology
For some, there is the home appliance (such as dish-washing machine etc.) of door body structure, if the user while home appliance opens the door suddenly when running, then may there is certain potential safety hazard, for instance the mechanism rotated in home appliance or the hot water etc. spilt are all potential security threats.At present, in the implementation of some home appliances, by arranging door trip and MCU (MicroControllerUnit, micro-control unit) it is connected, home appliance open the door or at closing time, MCU can identify the enabling of home appliance or action of closing the door according to the corresponding states of door trip, and can when home appliance opens the door, actively control load to close, thus improve the safety of home appliance to a certain extent.
But, when the problems such as MCU inefficacy occur, according to the state of door trip, the control of load also will be lost efficacy, therefore the reliability of such scheme is relatively low, and the safety in utilization of home appliance is high not enough.
Summary of the invention
It is contemplated that one of technical problem solved at least to a certain extent in above-mentioned technology.For this, it is an object of the present invention to propose a kind of door switch circuit for home appliance, the safety of home appliance can not only be improved, additionally it is possible to ensure Electrical Safety, reduce power consumption, reduce cost.
Further object is that a kind of home appliance of proposition.
For reaching above-mentioned purpose, the embodiment of one aspect of the present invention proposes a kind of door switch circuit for home appliance, wherein, described home appliance includes multiple gate-controlled switch and multiple load, each gate-controlled switch in the plurality of gate-controlled switch is for controlling the current supply circuit of the load of correspondence, described door switch circuit includes: door trip, one end of described door trip is connected with DC control supply, the other end of described door trip is connected to the vulnerabilities scan loop of described each gate-controlled switch, and described door trip responds the enabling of described home appliance or action of closing the door；Door trip testing circuit, the input of described door trip testing circuit is connected with the other end of described door trip, and described door trip testing circuit is used for the state detecting described door trip to obtain the enabling of described home appliance or action of closing the door；Controller, the input of described controller is connected with the outfan of described door trip testing circuit, multiple control output ends correspondence of described controller is connected to the vulnerabilities scan loop of described each gate-controlled switch, when described controller judges that described home appliance opens the door according to the enabling of described home appliance or action of closing the door, by controlling the vulnerabilities scan loop of described each gate-controlled switch so that described each gate-controlled switch disconnects, and when described home appliance opens the door, described door trip is off so that the vulnerabilities scan loop power-off of described each gate-controlled switch, realize described each gate-controlled switch to force to disconnect.
The door switch circuit for home appliance according to embodiments of the present invention, DC control supply is connected by one end of door trip, the other end of door trip is connected to the vulnerabilities scan loop of multiple gate-controlled switch, the other end of door trip is connected to the controller controlling multiple gate-controlled switches also by door trip testing circuit simultaneously, thus, by using single door trip and utilizing DC control supply, when home appliance opens the door, both can control multiple gate-controlled switch by controller to disconnect, the pressure that can realize again multiple gate-controlled switch by cutting off vulnerabilities scan loop disconnects, so that multiple loads of home appliance are out of service, more without adopting the isolation circuit such as optocoupler, the reliability that door trip controls can not only be improved, thus improving the safety of home appliance, Electrical Safety can also be ensured, reduce power consumption and reduce cost.
It addition, the door switch circuit for home appliance according to the above embodiment of the present invention proposition can also have following additional technical characteristic:
Specifically, described door trip testing circuit includes: the first resistance, and one end of described first resistance is as the input of described door trip testing circuit；First audion, the base stage of described first audion is connected with the other end of described first resistance, the grounded emitter of described first audion；Second resistance, one end of described second resistance is connected with the colelctor electrode of described first audion, and the other end of described second resistance is connected with default power supply；3rd resistance, one end of described 3rd resistance is connected with one end of the colelctor electrode of described first audion and described second resistance respectively, and the other end of described 3rd resistance is as the outfan of described door trip testing circuit.
Further, described door trip testing circuit also includes: the 4th resistance, and described 4th resistance is connected between base stage and the emitter stage of described first audion；First electric capacity, described first electric capacity and described 4th resistor coupled in parallel.
Further, described door trip testing circuit also includes: the second electric capacity, and described second electric capacity is connected between colelctor electrode and the emitter stage of described first audion；3rd electric capacity, one end of described 3rd electric capacity is connected with the emitter stage of described first audion, and the other end of described 3rd electric capacity is connected with the other end of described 3rd resistance.
According to one embodiment of present invention, described each gate-controlled switch is relay, first end of each relay links together using as common port, described common port is connected with the other end of described door trip, and the second end of each relay is corresponding with a control output end in the plurality of control output end respectively to be connected.
According to one embodiment of present invention, described home appliance is dish-washing machine, and the plurality of load includes washing pump and regeneration valve.
For reaching above-mentioned purpose, the embodiment of another aspect of the present invention proposes a kind of home appliance, and this home appliance includes the door switch circuit for home appliance proposed according to the above embodiment of the present invention.
Home appliance according to embodiments of the present invention, can not only improve the reliability that door trip controls, thus improving the safety of home appliance, additionally it is possible to ensures Electrical Safety, reduce power consumption and reduce cost.
It addition, the home appliance according to the above embodiment of the present invention proposition can also have following additional technical characteristic:
According to one embodiment of present invention, described home appliance is dish-washing machine.
Accompanying drawing explanation
Fig. 1 is the block diagram of the door switch circuit for home appliance according to embodiments of the present invention；
Fig. 2 is the current supply circuit schematic diagram of load according to an embodiment of the invention；
Fig. 3 is door switch circuit figure for home appliance according to an embodiment of the invention.
Detailed description of the invention
Being described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish.The embodiment described below with reference to accompanying drawing is illustrative of, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Door switch circuit for home appliance and the home appliance of the embodiment of the present invention are described below in conjunction with accompanying drawing.
Fig. 1 is the block diagram of the door switch circuit for home appliance according to embodiments of the present invention.
The home appliance of the embodiment of the present invention can include multiple gate-controlled switch and multiple load, and each gate-controlled switch in multiple gate-controlled switches is for controlling the current supply circuit of the load of correspondence.
As it is shown in figure 1, the door switch circuit for home appliance of the embodiment of the present invention, including: door trip 10, door trip testing circuit 20 and controller 30.
Wherein, one end of door trip 10 is connected with DC control supply, and the other end of door trip is connected to the vulnerabilities scan loop of each gate-controlled switch, and door trip responds the enabling of home appliance or action of closing the door；The input of door trip testing circuit 20 is connected with the other end of door trip 10, and door trip testing circuit 20 is used for the state detecting door trip 10 to obtain the enabling of home appliance or action of closing the door；The input of controller 30 is connected with the outfan of door trip testing circuit 20, multiple control output ends correspondence of controller 30 is connected to the vulnerabilities scan loop of each gate-controlled switch, when controller judges that home appliance opens the door according to the enabling of home appliance or action of closing the door, by controlling the vulnerabilities scan loop of each gate-controlled switch so that each gate-controlled switch disconnects, and when home appliance opens the door, door trip 10 is off so that the vulnerabilities scan loop power-off of each gate-controlled switch, it is achieved each gate-controlled switch is forced to disconnect.
In one embodiment of the invention, home appliance can be dish-washing machine, and multiple loads can include washing pump and regeneration valve etc., and each gate-controlled switch can be relay.As in figure 2 it is shown, the relay 1 in multiple relays can control the current supply circuit of washing pump ML by the disconnection with stationary contact of its movable contact and combination, relay n can control the current supply circuit of regeneration valve EV2 by the disconnection with stationary contact of its movable contact and combination.
As it is shown on figure 3, controller 30 can be the MCU in dish-washing machine, it has multiple control output end U_out1 to U_outn.One end of door trip 10 can be connected with the DC control supply of+12V, first end of each relay links together using as common port RELAY_COM, common port RELAY_COM is connected with the other end of door trip 10, and the second end of each relay is corresponding with a control output end in multiple control output ends respectively to be connected.In one embodiment of the invention, the first end of each relay and the second end can be the two ends of the coil of each relay.Meanwhile, the other end of door trip 10 is also connected with the input C_in of door trip testing circuit 20, and the input U_in of outfan C_out and the MCU of door trip testing circuit 20 is connected.
In one embodiment of the invention, as it is shown on figure 3, door trip testing circuit 20 comprises the steps that the first resistance R1, the first audion Q1, the second resistance R2 and the three resistance R3.Wherein, one end of the first resistance R1 is connected as the other end of the base stage b and the first resistance R1 of the input C_in of door trip testing circuit 20, the first audion Q1, the emitter e ground connection of the first audion Q1.One end of second resistance R2 is connected with the colelctor electrode c of the first audion Q1, and the other end of the second resistance R2 is connected with default power supply, and wherein, default power supply can be the power supply of+5V.One end of 3rd resistance R3 is connected with one end of the colelctor electrode c of the first audion Q1 and the second resistance R2 respectively, and the other end of the 3rd resistance R3 is as the outfan C_out of door trip testing circuit 20.It addition, door trip testing circuit 20 may also include that the 4th resistance R4, the first electric capacity C1, the second electric capacity C2 and the three electric capacity C3.Wherein, the 4th resistance R4 is connected between base stage b and the emitter e of the first audion Q1, and the first electric capacity C1 and the four resistance R4 is in parallel.Second electric capacity C2 is connected between colelctor electrode c and the emitter e of the first audion Q1, and one end of the 3rd electric capacity C3 is connected with the emitter e of the first audion Q1, and the other end of the 3rd electric capacity C3 and the other end of the 3rd resistance R3 are connected.
When home appliance performs to open the door or close the door action, door trip 10 may occur in which the state of correspondence.If home appliance performs door opening action, then door trip 10 can be at off-state to disconnect the connection between DC control supply and multiple relay, the vulnerabilities scan loop power-off of each relay can be made, realize each relay to force to disconnect, it is thus possible to disconnect the current supply circuit of multiple load so that multiple loads of home appliance are out of service.Simultaneously, when there is the state of correspondence in door trip 10, the signal of correspondence can be produced, door trip testing circuit 20 can receive this signal, and sends after this signal is amplified to MCU, MCU when judging that home appliance opens the door according to the signal received, control signal can be sent to multiple relays by multiple control output end U_out1 to U_outn, to control relay disconnection such that it is able to disconnect the current supply circuit of multiple load so that multiple loads of home appliance are out of service.
The door switch circuit for home appliance according to embodiments of the present invention, DC control supply is connected by one end of door trip, the other end of door trip is connected to the vulnerabilities scan loop of multiple gate-controlled switch, the other end of door trip is connected to the controller controlling multiple gate-controlled switches also by door trip testing circuit simultaneously, thus, by using single door trip and utilizing DC control supply, when home appliance opens the door, both can control multiple gate-controlled switch by controller to disconnect, the pressure that can realize again multiple gate-controlled switch by cutting off vulnerabilities scan loop disconnects, so that multiple loads of home appliance are out of service, more without adopting the isolation circuit such as optocoupler, the reliability that door trip controls can not only be improved, thus improving the safety of home appliance, Electrical Safety can also be ensured, reduce power consumption and reduce cost.
Corresponding above-described embodiment, the present invention also proposes a kind of home appliance.
The home appliance of the embodiment of the present invention, including the door switch circuit for home appliance that the above embodiment of the present invention proposes.Wherein, the home appliance of the embodiment of the present invention can be dish-washing machine.Its specific embodiment can refer to above-described embodiment, for avoiding redundancy, does not repeat them here.
Home appliance according to embodiments of the present invention, can not only improve the reliability that door trip controls, thus improving the safety of home appliance, additionally it is possible to ensures Electrical Safety, reduce power consumption and reduce cost.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
Additionally, term " first ", " second " are only for descriptive purposes, and it is not intended that indicate or imply relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include one or more these features.In describing the invention, " multiple " are meant that two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or integral；Can be mechanically connected, it is also possible to be electrical connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be connection or the interaction relationship of two elements of two element internals.For the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in the present invention as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention.In this manual, the schematic representation of above-mentioned term is necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can combine in one or more embodiments in office or example in an appropriate manner.Additionally, when not conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be carried out combining and combining by those skilled in the art.
Although above it has been shown and described that embodiments of the invention, it is understandable that, above-described embodiment is illustrative of, it is impossible to be interpreted as limitation of the present invention, and above-described embodiment can be changed, revises, replace and modification by those of ordinary skill in the art within the scope of the invention.
Claims (8)
1. the door switch circuit for home appliance, it is characterized in that, described home appliance includes multiple gate-controlled switch and multiple load, and each gate-controlled switch in the plurality of gate-controlled switch is for controlling the current supply circuit of the load of correspondence, and described door switch circuit includes:
Door trip, one end of described door trip is connected with DC control supply, and the other end of described door trip is connected to the vulnerabilities scan loop of described each gate-controlled switch, and described door trip responds the enabling of described home appliance or action of closing the door；
Door trip testing circuit, the input of described door trip testing circuit is connected with the other end of described door trip, and described door trip testing circuit is used for the state detecting described door trip to obtain the enabling of described home appliance or action of closing the door；
Controller, the input of described controller is connected with the outfan of described door trip testing circuit, multiple control output ends correspondence of described controller is connected to the vulnerabilities scan loop of described each gate-controlled switch, when described controller judges that described home appliance opens the door according to the enabling of described home appliance or action of closing the door, by controlling the vulnerabilities scan loop of described each gate-controlled switch so that described each gate-controlled switch disconnects, and when described home appliance opens the door, described door trip is off so that the vulnerabilities scan loop power-off of described each gate-controlled switch, realize described each gate-controlled switch to force to disconnect.
2. the door switch circuit for home appliance according to claim 1, it is characterised in that described door trip testing circuit includes:
First resistance, one end of described first resistance is as the input of described door trip testing circuit；
First audion, the base stage of described first audion is connected with the other end of described first resistance, the grounded emitter of described first audion；
Second resistance, one end of described second resistance is connected with the colelctor electrode of described first audion, and the other end of described second resistance is connected with default power supply；
3rd resistance, one end of described 3rd resistance is connected with one end of the colelctor electrode of described first audion and described second resistance respectively, and the other end of described 3rd resistance is as the outfan of described door trip testing circuit.
3. the door switch circuit for home appliance according to claim 2, it is characterised in that described door trip testing circuit also includes:
4th resistance, described 4th resistance is connected between base stage and the emitter stage of described first audion；
First electric capacity, described first electric capacity and described 4th resistor coupled in parallel.
4. the door switch circuit for home appliance according to claim 3, it is characterised in that described door trip testing circuit also includes:
Second electric capacity, described second electric capacity is connected between colelctor electrode and the emitter stage of described first audion；
3rd electric capacity, one end of described 3rd electric capacity is connected with the emitter stage of described first audion, and the other end of described 3rd electric capacity is connected with the other end of described 3rd resistance.
5. the door switch circuit for home appliance according to any one of claim 1-4, it is characterized in that, described each gate-controlled switch is relay, first end of each relay links together using as common port, described common port is connected with the other end of described door trip, and the second end of each relay is corresponding with a control output end in the plurality of control output end respectively to be connected.
6. the door switch circuit for home appliance according to claim 5, it is characterised in that described home appliance is dish-washing machine, and the plurality of load includes washing pump and regeneration valve.
7. a home appliance, it is characterised in that include the door switch circuit for home appliance according to any one of claim 1-6.
8. home appliance according to claim 7, it is characterised in that described home appliance is dish-washing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610284572.6A CN105785879A (en) | 2016-04-29 | 2016-04-29 | Door switch circuit used for household appliances and the household appliances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610284572.6A CN105785879A (en) | 2016-04-29 | 2016-04-29 | Door switch circuit used for household appliances and the household appliances |
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| Publication Number | Publication Date |
|---|---|
| CN105785879A true CN105785879A (en) | 2016-07-20 |
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ID=56400293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610284572.6A Pending CN105785879A (en) | 2016-04-29 | 2016-04-29 | Door switch circuit used for household appliances and the household appliances |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105785879A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108065892A (en) * | 2017-12-28 | 2018-05-25 | 宁波欧琳厨具有限公司 | A kind of water basin dish-washing machine drive gate control circuit |
| CN108685545A (en) * | 2018-05-14 | 2018-10-23 | 佛山市顺德区美的洗涤电器制造有限公司 | Dish-washing machine starts control method, device and computer readable storage medium |
| CN108907843A (en) * | 2018-07-28 | 2018-11-30 | 浙江星辉铝轮有限公司 | A kind of lathe power saving apparatus |
| CN109044226A (en) * | 2018-06-06 | 2018-12-21 | 佛山市顺德区美的洗涤电器制造有限公司 | Door switch circuit and washing electric appliance |
| CN112286082A (en) * | 2019-07-23 | 2021-01-29 | 无锡华润矽科微电子有限公司 | a load control device |
| CN114326413A (en) * | 2020-09-30 | 2022-04-12 | 广东美的生活电器制造有限公司 | Detection circuit of household appliance, control method of household appliance and storage medium |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108065892A (en) * | 2017-12-28 | 2018-05-25 | 宁波欧琳厨具有限公司 | A kind of water basin dish-washing machine drive gate control circuit |
| CN108685545A (en) * | 2018-05-14 | 2018-10-23 | 佛山市顺德区美的洗涤电器制造有限公司 | Dish-washing machine starts control method, device and computer readable storage medium |
| CN109044226A (en) * | 2018-06-06 | 2018-12-21 | 佛山市顺德区美的洗涤电器制造有限公司 | Door switch circuit and washing electric appliance |
| CN108907843A (en) * | 2018-07-28 | 2018-11-30 | 浙江星辉铝轮有限公司 | A kind of lathe power saving apparatus |
| CN112286082A (en) * | 2019-07-23 | 2021-01-29 | 无锡华润矽科微电子有限公司 | a load control device |
| CN114326413A (en) * | 2020-09-30 | 2022-04-12 | 广东美的生活电器制造有限公司 | Detection circuit of household appliance, control method of household appliance and storage medium |
| CN114326413B (en) * | 2020-09-30 | 2023-08-11 | 广东美的生活电器制造有限公司 | Detection circuit for household electrical appliance, control method for household electrical appliance, and storage medium |
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Application publication date: 20160720 |
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