CN210114418U - Door opening and closing protection circuit of dish washing machine - Google Patents
Door opening and closing protection circuit of dish washing machine Download PDFInfo
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- CN210114418U CN210114418U CN201920440713.8U CN201920440713U CN210114418U CN 210114418 U CN210114418 U CN 210114418U CN 201920440713 U CN201920440713 U CN 201920440713U CN 210114418 U CN210114418 U CN 210114418U
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- triode
- relay
- switch
- detection module
- protection circuit
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- 238000004851 dishwashing Methods 0.000 title description 2
- 238000001514 detection method Methods 0.000 claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 44
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
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Abstract
The utility model discloses a switch door protection circuit of dish washer, including the switch gate circuit, a load, a relay, control panel and the detection circuitry that leaks, the detection circuitry that leaks is including the detection module that leaks, triode Q1, triode Q2 and diode D1, the signal output part of the detection module that leaks links to each other with triode Q2's base, triode Q2's projecting pole ground connection, its collecting electrode links to each other with triode Q1's base, triode Q1's projecting pole is as relay drive power supply positive end, triode Q1's collecting electrode connects relay coil's drive input end, relay coil's drive output end connection control panel, diode D1's positive ground connection, triode Q1's collecting electrode is connected to diode D1's negative pole, the signal output part of the detection module that leaks still is connected to the control panel; this kind of door switch protection circuit of dish washer through addding the detection circuitry that leaks, the dish washer is difficult for causing the electric leakage risk in work under moist operational environment to improve the safety in utilization.
Description
Technical Field
The utility model belongs to the technical field of the dish washer technique and specifically relates to a switch door protection circuit of dish washer.
Background
The door opening and closing protection circuit of the existing dishwasher is, as shown in fig. 1, characterized in that a door opening and closing microswitch is connected in series in a strong electric circuit, and the power supply of a load is forcibly cut off when the door is opened.
However, the conventional dishwasher switch gate circuit described above still has the following disadvantages: (1) the method is characterized in that a microswitch is connected in series in a strong electric circuit, such as: the door opening and closing detection switch has the risk of electric leakage in the wet working environment of the dishwasher, and the requirement of a heavy load on the microswitch is higher.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a dish washer is difficult for causing the electric leakage risk under moist operational environment to improve the switch door protection circuit of safety in utilization.
The purpose of the utility model can also adopt the following technical measures to solve:
the utility model provides a switch door protection circuit of dish washer, includes switch gate circuit, load, relay and control panel, the load is established ties on switch gate circuit, the relay includes relay coil and relay switch, and relay switch establishes ties with the load, and the control signal end of control panel is connected to relay coil's one end, characterized by, still include the detection circuitry that leaks, the detection circuitry that leaks includes the detection module that leaks, triode Q1, triode Q2 and diode D1, the signal output part of the detection module that leaks links to each other with triode Q2's base, triode Q2's projecting pole ground connection, its collecting electrode links to each other with triode Q1's base, triode Q1's projecting pole is as relay drive power supply positive end, and relay coil's drive input end is connected to triode Q1's collecting electrode, and relay coil's drive output end connects the control panel, the anode of the diode D1 is grounded, the cathode of the diode D1 is connected with the collector of the triode Q1, and the signal output end of the water leakage detection module is also connected to the control board; this kind of switch door protection circuit of dish washer through addding the detection circuitry that leaks, realizes the effect that the light current of safe in utilization detected, and dish washer is difficult for causing the electric leakage risk under moist operational environment to improve the safety in utilization.
The utility model discloses can also adopt following technical measure to solve:
further, the water leakage detection device further comprises a resistor R1 and a resistor R2, wherein the resistor R1 is connected in series between the base of the triode Q1 and the collector of the triode Q2, and the resistor R2 is connected in series between the base of the triode Q2 and the signal output end of the water leakage detection module.
Furthermore, a plurality of loads are also connected in series on the switch gate circuit, each load is connected in series with a corresponding relay, each relay comprises a relay coil and a relay switch, the relay switch is connected in series with the corresponding load, and the relay coil is connected in series between the collector of the triode Q1 and the control board.
Furthermore, the water leakage detection module is a hall detection circuit, and the signal output end is a level output end of the hall detection circuit.
Furthermore, the water leakage detection module is a normally closed microswitch, the signal output end of the microswitch is the output end of the microswitch, the microswitch is closed in a normal state, and the microswitch is opened in water leakage.
Further, the water leakage detection module comprises a normally open microswitch and a resistor R3, wherein the input end of the normally open microswitch is connected with the resistor R3, the output end of the normally open microswitch is grounded, the signal output end is arranged between the input end of the normally open microswitch and the resistor R3, the microswitch is switched off in a normal state, and the microswitch is switched on in water leakage.
Further, during the dish washer normality, the signal output part of the detection module that leaks outputs high level signal, triode Q2 is the conducting state, triode Q1 is the conducting state, the relay break-make is normally controlled to the control panel, and when the dish washer leaked, the signal output part of the detection module that leaks stifled low level signal, triode Q2 is the off state, triode Q1 is the off state, and the relay disconnection is not controlled by the control panel, plays the guard action.
Further, the transistor Q1 is a PNP transistor, and the transistor Q2 is an NPN transistor.
Further, the emitter of the triode Q1 is connected to a 12V power supply as the positive terminal of the relay driving power supply.
The utility model has the advantages as follows:
(1) the utility model discloses switch door protection circuit of dish washer through addding the detection circuitry that leaks, realizes the effect that the light current of safe in utilization detected, and dish washer is difficult for causing the electric leakage risk in work under moist operational environment to improve safety in utilization.
(2) During the dish washer normality, the signal output part of the detection module that leaks outputs high level signal, triode Q2 is the conducting state, triode Q1 is the conducting state, the normal control relay break-make of control panel, when dish washer leaked, the signal output part of the detection module that leaks was stiff out low level signal, triode Q2 is the off state, triode Q1 is the off state, the relay disconnection is not controlled the control of control panel, play the guard action.
(3) The water leakage detection module can be a Hall detection circuit, or a normally closed microswitch, or a normally open microswitch and a resistor R3, and can achieve the purpose of the patent, and the implementation mode is easy and simple.
Drawings
Fig. 1 is a schematic diagram of a door opening and closing protection circuit of a dishwasher in accordance with the prior art.
Fig. 2 is a schematic diagram of the door opening and closing protection circuit of the dishwasher of the present invention.
Fig. 3 is a schematic view of the water leakage detection module according to an embodiment of the present invention.
Fig. 4 is a schematic view of the water leakage detection module according to the present invention.
Fig. 5 is a schematic view of the water leakage detection module according to the present invention.
Detailed Description
The invention will be further described with reference to the following drawings and examples:
referring to fig. 2 to 5, a door opening and closing protection circuit of a dishwasher includes a door opening and closing circuit 1, a load 2, a relay 3 and a control panel 4, the load 2 is connected in series with the door opening and closing circuit 1, the relay 3 includes a relay coil RL and a relay switch K, the relay switch K is connected in series with the load 2, one end of the relay coil RL is connected with a control signal terminal 41 of the control panel 4, the door opening and closing protection circuit is characterized by further including a water leakage detection circuit 5, the water leakage detection circuit 5 includes a water leakage detection module 51, a triode Q1, a triode Q2 and a diode D1, a signal output terminal 511 of the water leakage detection module 51 is connected with a base of a triode Q2, an emitter of a triode Q2 is grounded, a collector thereof is connected with a base of a triode Q1, an emitter of the triode Q1 serves as a positive relay driving power supply, a collector of the triode Q1, the driving output end of the relay coil RL is connected with the control board 4, the anode of the diode D1 is grounded, the cathode of the diode D1 is connected with the collector of the triode Q1, and the signal output end 511 of the water leakage detection module 51 is also connected with the control board 4; this kind of switch door protection circuit of dish washer through addding water leakage detection circuitry 5, realizes the effect that the light current of safe in utilization detected, and dish washer is difficult for causing the electric leakage risk under moist operational environment to improve the safety in utilization.
The water leakage detection device further comprises a resistor R1 and a resistor R2, wherein the resistor R1 is connected in series between the base of the triode Q1 and the collector of the triode Q2, and the resistor R2 is connected in series between the base of the triode Q2 and the signal output end 511 of the water leakage detection module 51; the switch gate circuit 1 is also connected in series with a plurality of the loads 6, each load 6 is connected in series with a corresponding relay 61, each relay 61 comprises a relay coil 611 and a relay switch K2, the relay switch K2 is connected in series with the corresponding load 6, and the relay coil 611 is connected in series between the collector of the triode Q1 and the control board 4. The triode Q1 is a PNP type triode, the triode Q2 is an NPN type triode, and the emitter of the triode Q1 is connected with a 12V power supply to serve as the positive end of the relay driving power supply.
The water leakage detection module can have the following embodiments:
the first embodiment of the water leakage detection module: as shown in fig. 3, the water leakage detection module 51 is a hall detection circuit, and the signal output terminal 511 is a level output terminal of the hall detection circuit.
Embodiment two of the water leakage detection module: as shown in fig. 4, the water leakage detection module 51 is a normally closed microswitch, and the signal output terminal 511 of the microswitch is an output terminal of the microswitch, and the microswitch is closed in a normal state and is opened in water leakage.
Third embodiment of the water leakage detection module: as shown in fig. 5, the water leakage detection module 51 includes a normally open microswitch and a resistor R3, an input end of the normally open microswitch is connected to the resistor R3, an output end of the normally open microswitch is grounded, the signal output end 511 is disposed between the input end of the normally open microswitch and the resistor R3, the microswitch is turned off in a normal state, and the microswitch is turned on in a water leakage state.
In the three embodiments of the water leakage detection module, when the dishwasher is in a normal state, the signal output terminal 511 of the water leakage detection module 51 outputs a high level signal, the triode Q2 is in a conducting state, the triode Q1 is in a conducting state, and the control board 4 normally controls the on/off of the relay, when the dishwasher leaks water, the signal output terminal 511 of the water leakage detection module 51 outputs a low level signal, the triode Q2 is in an off state, the triode Q1 is in an off state, and the relay is disconnected and is not controlled by the control board 4, so that a protection effect is achieved.
This kind of switch door protection circuit of dish washer through addding water leakage detection circuitry 5, realizes the effect that the light current of safe in utilization detected, and dish washer is difficult for causing the electric leakage risk under moist operational environment to improve the safety in utilization.
Claims (10)
1. The utility model provides a switch door protection circuit of dish washer, includes switch gate circuit, load, relay and control panel, the load is established ties on switch gate circuit, the relay includes relay coil and relay switch, and relay switch establishes ties with the load, and the control signal end of control panel is connected to relay coil's one end, characterized by, still include the detection circuitry that leaks, the detection circuitry that leaks includes the detection module that leaks, triode Q1, triode Q2 and diode D1, the signal output part of the detection module that leaks links to each other with triode Q2's base, triode Q2's projecting pole ground connection, its collecting electrode links to each other with triode Q1's base, triode Q1's projecting pole is as relay drive power supply positive end, and relay coil's drive input end is connected to triode Q1's collecting electrode, and relay coil's drive output end connects the control panel, the anode of the diode D1 is grounded, the cathode of the diode D1 is connected with the collector of the triode Q1, and the signal output end of the water leakage detection module is also connected to the control board.
2. The door switch protection circuit of the dishwasher of claim 1, further comprising a resistor R1 and a resistor R2, wherein the resistor R1 is connected in series between the base of the transistor Q1 and the collector of the transistor Q2, and the resistor R2 is connected in series between the base of the transistor Q2 and the signal output terminal of the water leakage detection module.
3. The door switch protection circuit of a dishwasher of claim 1, wherein the door switch circuit is further connected in series with a plurality of the loads, each load is connected in series with a corresponding relay, each relay comprises a relay coil and a relay switch, the relay switch is connected in series with the corresponding load, and the relay coil is connected in series between a collector of the transistor Q1 and the control board.
4. The door opening and closing protection circuit of a dishwasher according to claim 1, wherein the water leakage detection module is a hall detection circuit, and the signal output terminal is a level output terminal of the hall detection circuit.
5. The door opening and closing protection circuit of the dishwasher according to claim 1, wherein the water leakage detection module is a normally closed microswitch, a signal output end of the microswitch is an output end of the microswitch, the microswitch is closed in a normal state, and the microswitch is opened in case of water leakage.
6. The door switch protection circuit of the dishwasher of claim 1, wherein the water leakage detection module comprises a normally open type micro switch and a resistor R3, wherein an input end of the normally open type micro switch is connected with the resistor R3, an output end of the normally open type micro switch is grounded, the signal output end is arranged between the input end of the normally open type micro switch and the resistor R3, the micro switch is opened at a normal state, and the micro switch is closed at a water leakage state.
7. The door opening and closing protection circuit of the dishwasher according to claim 5 or 6, wherein the signal output terminal of the water leakage detection module outputs a high level signal in a normal state of the dishwasher, the transistor Q2 is in a conducting state, the transistor Q1 is in a conducting state, the control board normally controls the on/off of the relay, when the dishwasher leaks water, the signal output terminal of the water leakage detection module is stiff to a low level signal, the transistor Q2 is in an off state, the transistor Q1 is in an off state, and the relay is not controlled by the control board to perform a protection function.
8. The door switch protection circuit of a dishwasher of claim 1, wherein the transistor Q1 is a PNP type transistor.
9. The door switch protection circuit of a dishwasher of claim 1, wherein the transistor Q2 is an NPN-type transistor.
10. The switch door protection circuit of the dishwasher of claim 1, wherein an emitter of the transistor Q1 is connected to a 12V power supply as a positive terminal of the relay driving power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920440713.8U CN210114418U (en) | 2019-04-03 | 2019-04-03 | Door opening and closing protection circuit of dish washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920440713.8U CN210114418U (en) | 2019-04-03 | 2019-04-03 | Door opening and closing protection circuit of dish washing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210114418U true CN210114418U (en) | 2020-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920440713.8U Expired - Fee Related CN210114418U (en) | 2019-04-03 | 2019-04-03 | Door opening and closing protection circuit of dish washing machine |
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| Country | Link |
|---|---|
| CN (1) | CN210114418U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111286926A (en) * | 2020-03-06 | 2020-06-16 | 海信（山东）冰箱有限公司 | Washing machine |
-
2019
- 2019-04-03 CN CN201920440713.8U patent/CN210114418U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111286926A (en) * | 2020-03-06 | 2020-06-16 | 海信（山东）冰箱有限公司 | Washing machine |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |