CN214965255U - Dish washing machine and power supply control device thereof - Google Patents
Dish washing machine and power supply control device thereof Download PDFInfo
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- CN214965255U CN214965255U CN202121113891.3U CN202121113891U CN214965255U CN 214965255 U CN214965255 U CN 214965255U CN 202121113891 U CN202121113891 U CN 202121113891U CN 214965255 U CN214965255 U CN 214965255U
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- 238000004851 dishwashing Methods 0.000 title claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000000523 sample Substances 0.000 claims abstract description 25
- 238000005406 washing Methods 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 abstract description 24
- 238000000034 method Methods 0.000 abstract description 8
- 230000005611 electricity Effects 0.000 abstract description 4
- 238000001035 drying Methods 0.000 description 16
- 238000001514 detection method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 241000190070 Sarracenia purpurea Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The utility model discloses a dish washer and a power supply control device thereof, wherein the control device comprises a first switch circuit, a second switch circuit and a switch control circuit, the first switch circuit and the second switch circuit are connected in parallel between a power circuit and an alternating current live wire of the dish washer, a control end of the switch control circuit is connected with a controlled end of the second switch circuit, and the controlled end of the switch control circuit is connected with a main controller of the dish washer; the control device also comprises a switch auxiliary starting circuit, the control end of the switch auxiliary starting circuit is connected with the controlled end of the switch control circuit, and the controlled end of the switch auxiliary starting circuit is controlled by the washing water in the water tank of the dishwasher. Dish washer power supply control device, through two live wire switching control, dish washer open door in-process electricity, control switch control circuit switches on after the liquid level probe short circuit, realizes zero stand-by power consumption.
Description
Technical Field
The utility model relates to a dish washer technical field especially relates to a dish washer and power supply control device thereof.
Background
Energy conservation and emission reduction become the common concern in the world at present, and dish washing machines are continuously developed towards low energy consumption. At present, the prior art mainly reduces the standby power consumption by using a switching power supply with low power consumption in the dishwasher. For the current industry power consumption standard, the power consumption of the dishwasher in the shutdown mode or the standby/restart mode should not exceed 0.5W, while the power consumption of the product with the display function in the standby or restart mode should not exceed 1W. Therefore, in the case of such strict standby power consumption requirements, the power consumed by the circuits on the electronic control board of the dishwasher needs to be reduced as much as possible. Because a plurality of signal detection circuits and display circuits on an electric control board of the dish-washing machine can work after the electric control board is electrified, the standby power consumption of the dish-washing machine can be invisibly increased, and for the prior art which only adopts a low-power-consumption switching power supply, the standby power consumption can not be reduced to the standby power consumption requirement, so that the dish-washing machine can not meet the requirement of the industrial power consumption standard.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem mentioned in the background art that the standby power consumption of the existing dish washer is high. The utility model provides a dish washer and power supply control device thereof, through two live wire switching control, the dish washer is opened the door and is gone up the electricity, realizes zero standby power consumption.
In order to achieve the above object, the present invention provides a dishwasher and power supply control device thereof, which comprises:
a power supply control device of a dish washing machine comprises a first switch circuit, a second switch circuit and a switch control circuit, wherein the first switch circuit and the second switch circuit are connected between a power circuit and an alternating current live wire of the dish washing machine in parallel, the control end of the switch control circuit is connected with the controlled end of the second switch circuit, and the controlled end of the switch control circuit is connected with a main controller of the dish washing machine;
when a door of the dish-washing machine is opened, the first switch circuit is conducted, the power supply circuit is electrified, the power supply circuit outputs direct current, the main controller outputs a starting drive signal to the switch control circuit to control the switch control circuit to be conducted, the second switch circuit is started when the switch control circuit is conducted, and the fire wire end of the power supply circuit is communicated with the fire wire of the alternating current power supply to electrify the whole dish-washing machine;
when the door of the dish-washing machine is switched from an open state to a closed state, the first switch circuit is switched off, the main controller continuously outputs a starting drive signal to the switch control circuit, and the switch control circuit is continuously switched on to control the second switch circuit to be continuously switched on;
the control device also comprises a switch auxiliary starting circuit, the control end of the switch auxiliary starting circuit is connected with the controlled end of the switch control circuit, the controlled end of the switch auxiliary starting circuit is controlled by the washing water in the water tank of the dishwasher, when the switch auxiliary starting circuit is conducted, the switch auxiliary starting circuit controls the switch control circuit to be conducted, and the main controller stops outputting a starting drive signal to the switch control circuit.
Furthermore, the switch auxiliary starting circuit comprises a washing water detection piece, and when the washing water detection piece is contacted with the washing water in the water tank, the switch auxiliary starting circuit is conducted.
Furthermore, the washing water detection part comprises a pair of liquid level probes, one liquid level probe is connected with the third resistor, and the other liquid level probe is connected with the switch control circuit.
Further, the liquid level probe is arranged at the lowest part of the water tank of the dishwasher.
Furthermore, the second switch circuit comprises a relay and a first diode, a common junction point of a first contact of the relay and a cathode of the first diode is a power supply end of the second switch circuit, a common junction point of a second contact of the relay and an anode of the first diode is a controlled end of the second switch circuit, and a third contact and a fourth contact of the relay are respectively an input end and an output end of the second switch circuit.
Further, the switch control circuit comprises a first resistor and an NPN-type triode, one end of the first resistor is connected with the main controller, the other end of the first resistor is connected with a base electrode of the NPN-type triode, a collector of the NPN-type triode is a control end of the switch control circuit, and an emitter of the NPN-type triode is grounded.
Furthermore, the control device further comprises a second diode, the cathode end of the second diode is connected with the controlled end of the first resistor, and the anode end of the second diode is connected with the main controller.
Further, the first switch circuit includes a door switch, and the door switch is a mechanical switch.
Further, the control device further comprises a timer, the timer is electrically connected with the main controller, and when the timer obtains that the time length of the opening driving signal output to the switch control circuit by the main controller exceeds the time length threshold value, the main controller stops outputting the opening driving signal to the switch control circuit.
A dishwasher comprises the dishwasher power supply control device.
The utility model discloses a dish washer and power supply control device thereof has following advantage:
the utility model discloses a dishwasher power supply control device, through the double-live wire switching control, the dishwasher is electrified in the door opening process, and zero standby power consumption is realized; in the process of detecting the liquid level by the liquid level probe, the liquid level detection circuit drives the switch control circuit to continuously trigger, so that the situations that the main controller is reset and the dish-washing machine enters a power-down state due to interference are avoided.
Drawings
FIG. 1 is a schematic structural diagram of a dishwasher power supply control device according to the present invention;
fig. 2 is a schematic structural diagram of a dishwasher power supply control device according to another embodiment of the present invention.
The reference numbers in the figures illustrate: 1. a first switching circuit; 2. a main controller; 3. a second switching circuit; 4. a switch control circuit; 5. a switch auxiliary turn-on circuit; 6. a power supply circuit.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, the following description will be made in detail with reference to the accompanying drawings.
Fig. 1 schematically shows a schematic structural diagram of a power supply control device for a dishwasher, for convenience of illustration, only the parts related to the embodiments of the present invention are shown, as shown in fig. 1, the present invention provides a power supply control device for a dishwasher, which comprises a power circuit 6 and a main controller 2, the power circuit 6 is connected to an ac power supply, when the power circuit 6 receives an ac input, the ac power is converted into a dc power (such as +5V dc power, +12V dc power or +24V dc power, etc.) to supply power to the main controller 2 and the electric devices in the dishwasher.
The control device further comprises a first switch circuit 1, a second switch circuit 3 and a switch control circuit 4, the first switch circuit 1 and the second switch circuit 3 are arranged in parallel, the common live wire end of the two switch circuits is connected with the live wire of the alternating current power supply, the common zero wire end of the two switch circuits is connected to the live wire end of the power circuit 6 of the dish washing machine, the zero wire end of the power circuit 6 is connected to the zero wire, the control end of the switch control circuit 4 is connected with the controlled end of the second switch circuit 3, and the controlled end of the switch control circuit 4 is connected with the main controller 2.
When a door of the dish-washing machine is opened, the first switch circuit 1 is conducted, the power supply circuit 6 is electrified, the power supply circuit 6 outputs direct current, the main controller 2 outputs a starting drive signal to the switch control circuit 4 to control the switch control circuit 4 to be conducted, and when the switch control circuit 4 is conducted, the second switch circuit 3 is controlled to be started, so that a fire wire end of the power supply circuit 6 is communicated with a fire wire of an alternating current power supply, and the whole machine of the dish-washing machine is electrified;
when the door of the dishwasher is switched from the open state to the closed state, the first switch circuit 1 is disconnected, and the main controller 2 continuously outputs the opening drive signal to the switch control circuit 4, so that the switch control circuit 4 is continuously conducted to control the second switch circuit 3 to be continuously conducted, and at the moment, the live wire end of the power supply circuit 6 and the live wire of the alternating current power supply are in a conducting state through the second switch circuit 3.
The control device further comprises a switch auxiliary starting circuit 5, a control end of the switch auxiliary starting circuit 5 is connected with a controlled end of the switch control circuit 4, the controlled end of the switch auxiliary starting circuit 5 is controlled by washing water in a water tank of the dish washing machine, and the stability of the dish washing machine is improved by arranging the switch auxiliary starting circuit 5. When the switch auxiliary starting circuit 5 is turned on, the switch control circuit 4 can be controlled to be turned on by the switch auxiliary starting circuit 5.
In this embodiment, the switch auxiliary turn-on circuit 5 includes a washing water detector, and when the washing water detector contacts with the washing water in the water tank, the switch auxiliary turn-on circuit 5 is turned on.
As shown in fig. 2, the washing water detecting member includes a pair of level probes, one of which is connected to a third resistor R3, the other end of the third resistor R3 is a power source terminal, and the other of which is connected to the switch control circuit 4. When dish washer operation back, main control unit 2 control dish washer's washing subassembly is to the basin water injection, water makes two liquid level probe short circuits, thereby make the supplementary circuit 5 that opens of switch on, and provide the high potential for on-off control circuit 4, on-off control circuit 4 control on-off control circuit 5 switches on, and then make power supply circuit 6 be in the power-on state all the time, effectively prevent to receive external disturbance to lead to main control unit 2 to reset, triode Q1 closes, make dish washer get into zero-power consumption standby state and out of work, improve the stability of complete machine.
Normally, when the two level probes are short-circuited by the washing water, the voltage across the third resistor R3 and the current flowing through the third resistor R3 are changed, and whether the switch auxiliary starting circuit 5 is turned on or not can be determined by detecting the electrical signal of the third resistor R3.
Dish washer is at washing process, drying process, will carry out the drainage operation, in order to guarantee the water in the basin or the residual water homoenergetic in the basin makes the liquid level probe short circuit, the liquid level probe sets up the lowest department at the dish washer basin, at the drainage in-process, opens the drain pump drainage, has certain surplus water in the drinking cup of dish washer, so, dish washer is after the stoving completion, because the basin has certain liquid level and can ensure that dish washer is circular telegram always.
In other embodiments, the washing water detecting member may be replaced with a liquid level probe, and the other liquid level probe is replaced with a water tank. As long as can realize among the prior art that the washing water soaks the washing water and detect the structure that the piece made the switch assist open circuit switch on, all can be used as the washing water detection piece of this application.
In an embodiment, the dish washer includes drying assembly, drying assembly includes drying passageway and drying fan, drying fan arranges in drying passageway, drying fan's control circuit is connected with main control unit 2 electricity, main control unit 2 obtains drying fan's operating parameter in real time, such as drying fan's drive current, drive voltage etc. to confirm drying fan's running state, when main control unit 2 obtained drying fan and switched from the on-state to the off-state, main control unit 2 exports the drive signal of opening to on-off control circuit 4, main control unit 2 exports the high level to on-off control circuit 4 promptly, make main control unit 2 drive on-off control circuit 4 and continuously open, in order to supply power to the dish washer.
In another embodiment, the dishwasher comprises a residual water removal pump, a control circuit of the residual water removal pump is electrically connected with the main controller 2, when the main controller 2 obtains that the residual water removal pump is switched from a stop state to a working state, the main controller 2 obtains the running state of the residual water removal pump by detecting the electrical parameters (such as current, voltage and the like) of the residual water removal pump, the main controller 2 outputs a starting drive signal to the switch control circuit 4, and simultaneously, the residual water removal pump is controlled to be started to empty water in the water tank, the two liquid level probes are disconnected, the dishwasher is in a standby state, after the residual water removal pump is stopped, the dishwasher is used completely, the main controller 2 stops outputting the starting drive signal to the switch control circuit 4, the switch control circuit 4 is disconnected, the first switch circuit 1 is disconnected, and the dishwasher is in a complete power-down state.
In addition, still can detect drying blower and the operating condition who removes the surplus water pump simultaneously, after detecting drying blower and stop, and when removing the surplus water pump and open, main controller 2 exports to on-off control circuit 4 and opens drive signal.
Switching is in the in-service use, only gets to put the tableware, gets to put the tableware and when washing, all can open the operation of dish washer machine door, so, switch into the closed condition from the open mode at the machine door of dish washer and after main control unit 2 received power supply information of power supply circuit 6, judge whether dish washer gets into standby state.
Specifically, the control device further comprises a timer, the timer is electrically connected with the main controller 2, the timer is used for recording the time length of the main controller 2 outputting the start driving signal to the switch control circuit 4, and when the time length obtained by the timer that the main controller 2 outputs the start driving signal to the switch control circuit 4 exceeds a time length threshold value, the main controller 2 stops outputting the start driving signal to the switch control circuit 4.
Besides, whether the electric equipment such as a washing component, a drying component and the like of the dish washing machine operates or not can be monitored in real time through the main controller 2 so as to confirm whether the dish washing machine enters a standby state or not.
Specifically, in order to realize zero power consumption of the dishwasher in a standby state, the first switch circuit 1 comprises a door switch SW, the door switch SW is a mechanical switch, and when a machine door of the dishwasher is opened, the mechanical switch is closed, so that a live wire end of the power circuit 6 is connected with a live wire; when the machine door is closed, the mechanical switch is opened, so that the live wire end of the power circuit 6 is disconnected with the live wire.
In one embodiment, as shown in fig. 2, the second switch circuit 3 includes a relay K1 and a first diode D1, a common point of a first contact a of the relay K1 and a cathode of the first diode D1 is a power supply terminal of the second switch circuit 3, a common point of a second contact b of the relay K1 and an anode of the first diode D1 is a controlled terminal of the second switch circuit 3, and a third contact c and a fourth contact D of the relay K1 are an input terminal and an output terminal of the second switch circuit 3, respectively, and are connected to a live wire and a live wire terminal of the power supply circuit 6, respectively.
In other embodiments, the second switch circuit 3 may also be an optical coupler device, which can also achieve the above-mentioned functions.
As shown in fig. 2, the switch control circuit 4 includes a first resistor R1 and a transistor Q1, one end of the first resistor R1 is a controlled end and is connected to the main controller 2, the other end of the first resistor R1 is connected to a base of the transistor Q1, a collector of the transistor Q1 is a control end of the switch control circuit 4, an emitter of the transistor Q1 is grounded, the transistor Q1 is an NPN-type transistor, the transistor Q1 controls switching of the relay K1, a high level is input to the base of the transistor Q1, and the transistor Q1 is turned on; the base of the triode Q1 is at low level, and the triode Q1 is closed, so that the on-off control of the second switch circuit 3 is realized.
In order to ensure that the base electrode of the triode Q1 is at a low level in the standby process of the dishwasher, a second resistor R2 is connected in parallel between the base electrode and the emitting electrode of the triode Q1, so that the triode Q1 is prevented from being conducted by mistake, a relay K1 malfunctions, and the power circuit 6 is powered on.
When the switch auxiliary starting circuit 5 is turned on, the dc power is divided by the resistor R2 and the resistor R3, the base voltage of the transistor Q1 may be higher than the starting driving signal output by the main controller 2, and in order to prevent the current from damaging the main controller 2, the control device further includes a second diode D2, the cathode terminal of the second diode D2 is connected to the controlled terminal of the first resistor R1, and the anode terminal of the second diode D2 is connected to the main controller 2.
The utility model discloses a dishwasher control device, through the switch-on of door switch SW control live wire and power supply circuit 6, power supply circuit 6 outputs the direct current, main control unit 2 output opens drive signal to triode Q1, triode Q1 opens relay K1, and then, relay K1 switches on, thereby make live wire and power supply circuit 6 switch on, when the time length exceeded time length threshold value on power supply circuit 6, main control unit 2 exports the outage signal to triode Q1, namely the low level, the dishwasher falls the electricity completely; if the power-on time of the power circuit 6 does not exceed the time threshold, the conduction condition of the liquid level probe is detected, the switch auxiliary starting circuit 5 is conducted, and therefore the triode Q1 drives the relay K1 to be continuously closed, and the power circuit 6 is continuously conducted.
The liquid level probe is short-circuited by the washing water when the dish-washing machine works, so that the triode Q1 is always conducted when the dish-washing machine works, the relay K1 is continuously closed, and the power circuit 6 supplies power all the time; so as to prevent the main controller 2 from resetting caused by external interference when the dish-washing machine works, the triode Q1 is closed, and the whole machine enters a standby 0 power consumption state and does not work; the stability of the whole machine is improved. The liquid level probe is arranged at the lowest position of the water tank of the dish-washing machine, so that the characteristic that a certain amount of residual water exists in the water cup after the dish-washing machine is dried is utilized, and even after the drying is finished, the dish-washing machine can be always electrified due to the liquid level in the water tank; when power is off, the liquid level probe is disconnected through the residual water removal pump, and the liquid level probe enters a standby state in cooperation with the level of the main controller 2; the logic is as follows: the main controller 2 firstly controls the output high level and controls the conduction of the triode Q1; then, starting a residual water removing pump to pump residual water in a water tank of the dish washing machine, and disconnecting the liquid level probe; the main controller 2 outputs low level, the power circuit 6 is disconnected, and the dishwasher is completely powered off.
Based on the positive effect of above-mentioned dish washer power supply control device in zero-power consumption standby and operation process, the utility model also provides a dish washer, including foretell dish washer power supply control device.
The power supply control device of the dish washing machine is controlled by switching of double live wires, the dish washing machine is powered on in the door opening process, and zero standby power consumption is realized; in the process of detecting the liquid level by the liquid level probe, the switch auxiliary starting circuit is conducted and drives the switch control circuit 4 to continuously trigger, so that the situations that the main controller 2 is reset and the dish-washing machine enters a power-down state due to interference are avoided.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.
Claims (10)
1. A dishwasher power supply control device is characterized by comprising a first switch circuit, a second switch circuit and a switch control circuit, wherein the first switch circuit and the second switch circuit are connected between a power circuit and an alternating current live wire of a dishwasher in parallel, the control end of the switch control circuit is connected with the controlled end of the second switch circuit, and the controlled end of the switch control circuit is connected with a dishwasher main controller;
when a door of the dish-washing machine is opened, the first switch circuit is conducted, the power supply circuit is electrified, the power supply circuit outputs direct current, the main controller outputs a starting drive signal to the switch control circuit to control the switch control circuit to be conducted, the second switch circuit is started when the switch control circuit is conducted, and the fire wire end of the power supply circuit is communicated with the fire wire of the alternating current power supply to electrify the whole dish-washing machine;
when the door of the dish-washing machine is switched from an open state to a closed state, the first switch circuit is switched off, the main controller continuously outputs a starting drive signal to the switch control circuit, and the switch control circuit is continuously switched on to control the second switch circuit to be continuously switched on;
the control device also comprises a switch auxiliary starting circuit, the control end of the switch auxiliary starting circuit is connected with the controlled end of the switch control circuit, the controlled end of the switch auxiliary starting circuit is controlled by the washing water in the water tank of the dishwasher, when the switch auxiliary starting circuit is conducted, the switch auxiliary starting circuit controls the switch control circuit to be conducted, and the main controller stops outputting a starting drive signal to the switch control circuit.
2. The power supply control device of a dishwasher of claim 1, wherein the switch auxiliary turn-on circuit comprises a washing water detecting member, and the switch auxiliary turn-on circuit is turned on when the washing water detecting member is in contact with the washing water in the sump.
3. The dishwasher power supply control device of claim 2 wherein the wash water detector comprises a pair of level probes, one level probe being connected to the third resistor and the other level probe being connected to the switch control circuit.
4. A dishwasher power supply control device according to claim 3, wherein the level probe is provided at the lowermost extent of the dishwasher sump.
5. The dishwasher power supply control device of claim 1, wherein the second switch circuit comprises a relay and a first diode, a common point of a first contact of the relay and a cathode of the first diode is a power supply terminal of the second switch circuit, a common point of a second contact of the relay and an anode of the first diode is a controlled terminal of the second switch circuit, and a third contact and a fourth contact of the relay are an input terminal and an output terminal of the second switch circuit, respectively.
6. The power supply control device of the dishwasher of claim 1, wherein the switch control circuit comprises a first resistor and an NPN type triode, one end of the first resistor is connected to the main controller, the other end of the first resistor is connected to a base of the NPN type triode, a collector of the NPN type triode is a control end of the switch control circuit, and an emitter of the NPN type triode is grounded.
7. The dishwasher power supply control device of claim 6, wherein the control device further comprises a second diode, a cathode terminal of the second diode is connected with the controlled terminal of the first resistor, and an anode terminal of the second diode is connected with the main controller.
8. The dishwasher power supply control device of claim 1 wherein the first switch circuit comprises a door switch, the door switch being a mechanical switch.
9. The dishwasher power supply control device of claim 1, wherein the control device further comprises a timer electrically connected to the main controller, and when the timer detects that the duration of the on drive signal output by the main controller to the switch control circuit exceeds a duration threshold, the main controller stops outputting the on drive signal to the switch control circuit.
10. A dishwasher, characterized by comprising a dishwasher power supply control device as claimed in any one of claims 1 to 9.
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| CN202121113891.3U CN214965255U (en) | 2021-05-24 | 2021-05-24 | Dish washing machine and power supply control device thereof |
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| CN113367633A (en) * | 2021-05-24 | 2021-09-10 | 珠海格力电器股份有限公司 | Dish washing machine and power supply control device thereof |
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| CN113367633A (en) * | 2021-05-24 | 2021-09-10 | 珠海格力电器股份有限公司 | Dish washing machine and power supply control device thereof |
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