CN103845025B - Dish-washing machine and input voltage measurement thereof and protection circuit and method - Google Patents

Dish-washing machine and input voltage measurement thereof and protection circuit and method Download PDF

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CN103845025B
CN103845025B CN201210499684.5A CN201210499684A CN103845025B CN 103845025 B CN103845025 B CN 103845025B CN 201210499684 A CN201210499684 A CN 201210499684A CN 103845025 B CN103845025 B CN 103845025B
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voltage
described
dish
master controller
low
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CN201210499684.5A
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CN103845025A (en
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杨明检
程刚
钟启旺
黄华明
吉爽
区兆敏
钟窑平
管庆军
雷振雄
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佛山市顺德区美的洗涤电器制造有限公司
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Abstract

The present invention is applicable to voltage detecting field, it is provided that a kind of dish-washing machine and input voltage measurement thereof and protection circuit and method.nullThe present invention includes voltage conversion processing module and the input voltage measurement of master controller and protection circuit by using in dish-washing machine,According to default transformation ratio, the High Level AC Voltage accessed from electrical network live wire is carried out blood pressure lowering by voltage conversion processing module and obtain low-voltage AC,And this low-voltage AC is carried out rectifying and wave-filtering to export a low-voltage DC,Master controller correspondingly controls washing operation according to the mode of operation of dish-washing machine and the magnitude of voltage of low-voltage DC and implements load、Drainage system or the duty of alarm device,And according to the electric voltage exception degree of low-voltage DC correspondingly control washing operation implement load quit work,Or drive drainage system to start and control alarm device and carry out alarm,Thus control its basic load when the input voltage overflow fixed working voltage scope of dish-washing machine and quit work,To reach to protect the purpose of dish-washing machine.

Description

Dish-washing machine and input voltage measurement thereof and protection circuit and method

Technical field

The invention belongs to voltage detecting field, particularly relate to a kind of dish-washing machine and input voltage measurement thereof and protection circuit and method.

Background technology

Dish-washing machine is as a kind of warewashing equipment, it is during washing tableware, may alternation under the conditions of different input voltages, and owing to the controller in dish-washing machine and other electrical appliance parts are to have certain requirements for running voltage, if input voltage exceeds controller or the rated operational voltage scope of other electricity consumption devices, then can directly affect job stability and the reliability of dish-washing machine complete machine, and then reduce the overall performance of dish-washing machine and add the energy consumption of dish-washing machine.

For the impact on dish-washing machine of the above-mentioned input voltage, input voltage clamper is prevented high voltage from dish-washing machine causing above-mentioned impact at a relatively-stationary magnitude of voltage by using varistor in dish-washing machine by prior art.But, varistor can only realize voltage clamp at short notice, it is impossible to preventing dishwasher into operation in the case of input voltage long-time overflow fixed working voltage scope, therefore the reliability of prior art is relatively low.

Summary of the invention

It is an object of the invention to provide input voltage measurement and the protection circuit of a kind of dish-washing machine, it is intended to solve prior art and cannot prevent dishwasher into operation and the low problem of reliability in the case of input voltage long-time overflow fixed working voltage scope.

The present invention is achieved in that input voltage measurement and the protection circuit of a kind of dish-washing machine, and described input voltage measurement includes with protection circuit:

Voltage conversion processing module, first input end and the second input connect electrical network live wire and electrical network zero line respectively, obtain low-voltage AC for the High Level AC Voltage accessed from described electrical network live wire being carried out blood pressure lowering according to default transformation ratio, and described low-voltage AC is carried out rectifying and wave-filtering to export a low-voltage DC;

Master controller, first general input/output port connects the outfan of described voltage conversion processing module, and second general input/output port, 3rd general input/output port and the 4th general input/output port implement load for washing operation with dish-washing machine respectively, drainage system and alarm device connect, magnitude of voltage for the mode of operation according to dish-washing machine and described low-voltage DC correspondingly controls described washing operation and implements load, described drainage system or the duty of described alarm device, correspondingly control the enforcement load of described washing operation according to the electric voltage exception degree of described low-voltage DC to quit work simultaneously, or drive described drainage system to start and control described alarm device and carry out alarm.

The present invention also provides for a kind of dish-washing machine; described dish-washing machine includes that washing operation implements load, drainage system, alarm device and aforesaid input voltage measurement and protection circuit, and described input voltage measurement is implemented load, described drainage system and described alarm device conductance with described washing operation respectively with protection circuit and is connected.

Present invention also offers a kind of input voltage measurement based on described input voltage measurement and protection circuit and guard method, described input voltage measurement includes with guard method:

A. the High Level AC Voltage accessed from described electrical network live wire is carried out blood pressure lowering according to default transformation ratio and obtains low-voltage AC by voltage conversion processing module, and described low-voltage AC carries out rectifying and wave-filtering to export a low-voltage DC;

B. master controller judges whether the mode of operation of dish-washing machine is standby mode, washing mode or factory test mode, is, then perform step C, no, then jump back to step B;

The most described master controller judges that the magnitude of voltage of described low-voltage DC, whether more than the first voltage threshold and less than the second voltage threshold, is then to perform step D, no, then perform step E;

The magnitude of voltage of described low-voltage DC is compared by the most described master controller with multiple voltage thresholds, electric voltage exception timing is carried out judge the electric voltage exception of described low-voltage DC further according to comparative result after, and correspondingly control described washing operation according to chronometric data and implement load and quit work or drive described drainage system to start and control described alarm device and carry out alarm, and execution step F;

The most described master controller judges whether dish-washing machine is in factory test mode, determines the operation conditions of described voltage conversion processing module according to judged result, and correspondingly controls the duty of described alarm device, and perform step F;

The most described master controller exits voltage detecting process.

nullThe present invention includes described voltage conversion processing module and the described input voltage measurement of described master controller and protection circuit by using in dish-washing machine,According to default transformation ratio, the High Level AC Voltage accessed from described electrical network live wire is carried out blood pressure lowering by described voltage conversion processing module and obtain low-voltage AC,And described low-voltage AC is carried out rectifying and wave-filtering to export a low-voltage DC,Described master controller correspondingly controls described washing operation according to the mode of operation of dish-washing machine and the magnitude of voltage of described low-voltage DC and implements load、Described drainage system or the duty of described alarm device,And according to the electric voltage exception degree of described low-voltage DC correspondingly control described washing operation implement load quit work,Or drive described drainage system to start and control described alarm device and carry out alarm,It is achieved thereby that the basic load controlling dish-washing machine when the input voltage overflow fixed working voltage scope of dish-washing machine quits work,To reach to protect the purpose of dish-washing machine,Solve prior art and cannot prevent dishwasher into operation and the low problem of reliability in the case of input voltage long-time overflow fixed working voltage scope.

Accompanying drawing explanation

Fig. 1 is the structure chart of the dish-washing machine that the embodiment of the present invention is provided;

Fig. 2 is the exemplary circuit structure chart comprising input voltage measurement and the dish-washing machine of protection circuit that the embodiment of the present invention is provided;

Fig. 3 is the input voltage measurement flowchart with guard method of the dish-washing machine that the embodiment of the present invention is provided;

Fig. 4 be input voltage measurement and the guard method of the dish-washing machine that the embodiment of the present invention is provided implement flow chart.

Detailed description of the invention

In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.

nullThe embodiment of the present invention includes voltage conversion processing module and the input voltage measurement of master controller and protection circuit by using in dish-washing machine,According to default transformation ratio, the High Level AC Voltage accessed from electrical network live wire is carried out blood pressure lowering by voltage conversion processing module and obtain low-voltage AC,And this low-voltage AC is carried out rectifying and wave-filtering to export a low-voltage DC,Master controller correspondingly controls washing operation according to the mode of operation of dish-washing machine and the magnitude of voltage of low-voltage DC and implements load、Drainage system or the duty of alarm device,And according to the electric voltage exception degree of low-voltage DC correspondingly control washing operation implement load quit work,Or drive drainage system to start and control alarm device and carry out alarm,It is achieved thereby that the basic load controlling dish-washing machine when the input voltage overflow fixed working voltage scope of dish-washing machine quits work,To reach to protect the purpose of dish-washing machine.

Input voltage measurement provided by the present invention and protection circuit be described below as a example by the application in dish-washing machine:

Fig. 1 shows the structure of the dish-washing machine that the embodiment of the present invention provided, and for convenience of description, illustrate only part related to the present invention, and details are as follows:

Dish-washing machine includes that input voltage measurement and protection circuit 100, washing operation implement load 200, drainage system 300 and alarm device 400, and input voltage measurement is implemented load 200, drainage system 300 and alarm device 400 conductance with washing operation respectively with protection circuit 100 and is connected.

Input voltage measurement includes with protection circuit 100:

Voltage conversion processing module 101, first input end and the second input connect electrical network live wire L and electrical network zero line N respectively, obtain low-voltage AC for the High Level AC Voltage accessed from electrical network live wire L being carried out blood pressure lowering according to default transformation ratio, and this low-voltage AC is carried out rectifying and wave-filtering to export a low-voltage DC;

Master controller 102, first general input/output port connects the outfan of voltage conversion processing module 101, and second general input/output port, 3rd general input/output port and the 4th general input/output port are for implementing load 200 with washing operation respectively, drainage system 300 and alarm device 400 connect, the magnitude of voltage of the low-voltage DC exported for the mode of operation according to dish-washing machine and voltage conversion processing module 101 correspondingly controls washing operation and implements load 200, drainage system 300 or the duty of alarm device 400, the electric voltage exception degree of the low-voltage DC simultaneously exported according to voltage conversion processing module 101 correspondingly controls washing operation enforcement load 200 and quits work, or drive drainage system 300 to start and control alarm device 400 and carry out alarm.

In the present embodiment, washing operation enforcement load 200 refers to realize in dish-washing machine each several part electrical control mechanism of washing operation;Drainage system 300 refers to realize in dish-washing machine the electrical control mechanism of drain function;Alarm device 400 can be the combination of voice guard, light-emitting caution light fixture or voice guard and light-emitting caution light fixture.

Fig. 2 shows the input voltage measurement of dish-washing machine shown in Fig. 1 and the exemplary circuit structure of protection circuit, for convenience of description, illustrate only part related to the present invention, and details are as follows:

As one embodiment of the invention, voltage conversion processing module 101 includes:

Transformator T1, commutation diode D1, filter capacitor C1, resistance R1, current-limiting resistance R2, diode D2 and electric capacity C2;

First end 1 of the armature winding of transformator T1 and the second end 2 are respectively first input end and second input of voltage conversion processing module 101, first end 3 of the secondary windings of the anode connection transformer T1 of commutation diode D1, the negative electrode of commutation diode D1 is connected to first end of current-limiting resistance R2 altogether with the positive pole of filter capacitor C1 and first end of resistance R1, second end of current-limiting resistance R2 and the anode of diode D2 and the outfan that common contact is voltage conversion processing module 101 of first end of electric capacity C2, the negative electrode of diode D2 meets DC source VCC, second end 4 of the secondary windings of transformator T1 and the negative pole of filter capacitor C1, second end of resistance R1 and second end of electric capacity C2 are connected to ground altogether.Wherein, the transformation ratio of transformator T1 is specially 106:1;The output voltage of DC source VCC is 5V.

As one embodiment of the invention, master controller 102 be model be the single-chip microcomputer of UPD78F8513A.In other embodiments of the present invention, master controller 102 can also is that the single-chip microcomputer that model is UPD78F0524A, UPD78F0511 or other disposable types.

Below in conjunction with operation principle, above-mentioned input voltage measurement is described further with protection circuit 100:

In the work process of dish-washing machine, the High Level AC Voltage introduced from electrical network live wire L is converted to low-voltage AC according to the transformation ratio of 106:1 by transformator T1, this low-voltage AC obtains a low pressure half-sinusoid unidirectional current after carrying out rectification process by commutation diode D1, this low pressure half-sinusoid unidirectional current carries out obtaining a smooth low-voltage DC after ripple filters by the filter circuit being made up of filter capacitor C1, resistance R1, current-limiting resistance R2, electric capacity C2 and diode D1, and this low-voltage DC enters the first general input/output port of master controller 102.

Master controller 102 is internal prestores six voltage threshold Vn(any one value in n correspondence 1,2,3,4,5 or 6), wherein VnCorresponding(VRMSIt is the virtual value of zero hot voltage), it is assumed that the symbol of the first voltage threshold to the 6th voltage threshold is V1-V6, then the magnitude relationship between six voltage thresholds is V1 < V3 < V5 < V6 < V4 < V2.Master controller 102 first determines whether the mode of operation of dish-washing machine, when dish-washing machine is in standby mode, washing mode or factory test mode, the voltage of low-voltage DC is detected by master controller 102, when the magnitude of voltage of low-voltage DC is not more than the first voltage threshold (such as V1 correspondence 80V) or is not less than the second voltage threshold (such as V2 correspondence 400V), if dish-washing machine is in factory test mode, then master controller 102 judges voltage conversion processing module 101 fault and drives alarm device 400 to send alarm;If dish-washing machine is not in factory test mode, then master controller 102 judges that voltage conversion processing module 101 damages and stops voltage detecting process.

When the magnitude of voltage of low-voltage DC is between the first voltage threshold and the second voltage threshold, then master controller 102 continues to judge the magnitude of voltage of low-voltage DC, if the magnitude of voltage of low-voltage DC is less than tertiary voltage threshold value (such as V3 correspondence 180V) or more than the 4th voltage threshold (such as V4 correspondence 270V), then master controller 102 proceeds by the timing of electric voltage exception time, if the electric voltage exception time is more than 1 second, then master controller 102 judges input voltage exception and controls washing operation and implement load and 200 quit work, continue thereafter with and judge the electric voltage exception time, if the electric voltage exception time is more than 60 seconds, then master controller 102 drives alarm device 400 to send alarm, control drainage system 300 is opened and is controlled dish-washing machine and exits washing sequential;If the electric voltage exception time is less than 1 second, then master controller 102 judges that input voltage normally and again to the magnitude of voltage of low-voltage DC judges.If the magnitude of voltage of low-voltage DC is between tertiary voltage threshold value (such as V3 correspondence 180V) with the 4th voltage threshold (270V as corresponding in V4), then master controller 102 continues to judge the magnitude of voltage of low-voltage DC, when the magnitude of voltage of low-voltage DC is between the 5th voltage threshold (such as V5 correspondence 200V) with the 6th voltage threshold (250V as corresponding in V6), master controller 102 judges that input voltage normally and again to the magnitude of voltage of low-voltage DC judges;When the magnitude of voltage of low-voltage DC is not more than the 5th voltage threshold (such as V5 correspondence 200V) or is not less than the 6th voltage threshold (such as V6 correspondence 250V), master controller 102 judges whether the result of last voltage detecting is electric voltage exception, it is, then master controller 102 proceeds by the timing of electric voltage exception time, if the electric voltage exception time is more than 1 second, then master controller 102 judges input voltage exception and controls washing operation and implement load and 200 quit work, continue thereafter with and judge the electric voltage exception time, if the electric voltage exception time is more than 60 seconds, then master controller 102 drives alarm device 400 to send alarm, control drainage system 300 is opened and is controlled dish-washing machine and exits washing sequential;If the electric voltage exception time is less than 1 second, then master controller 102 judges that input voltage normally and again to the magnitude of voltage of low-voltage DC judges;No, then judge that input voltage is normal and again judges the magnitude of voltage of low-voltage DC.

The input voltage measurement based on above-mentioned input voltage measurement and protection circuit that Fig. 3 shows that the embodiment of the present invention provided realizes flow process with guard method, for convenience of description, illustrate only part related to the present invention, and details are as follows:

In step sl, the High Level AC Voltage accessed from electrical network live wire is carried out blood pressure lowering according to default transformation ratio and obtains low-voltage AC by voltage conversion processing module, and this low-voltage AC carries out rectifying and wave-filtering to export a low-voltage DC.

In step s 2, master controller judges whether the mode of operation of dish-washing machine is standby mode, washing mode or factory test mode, is, then perform step S3, no, then jump back to step S2.

In step s3, master controller judges that the magnitude of voltage of low-voltage DC, whether more than the first voltage threshold and less than the second voltage threshold, is then to perform step S4, no, then perform step S5.

In step s 4, the magnitude of voltage of low-voltage DC is compared by master controller with multiple voltage thresholds, electric voltage exception timing is carried out judge the electric voltage exception of described low-voltage DC further according to comparative result after, and correspondingly control washing operation according to chronometric data and implement load and quit work or drive drainage system to start and control alarm device and carry out alarm, and execution step S6.

In step s 5, master controller judges whether dish-washing machine is in factory test mode, determines the operation conditions of voltage conversion processing module according to judged result, and correspondingly controls the duty of alarm device, and performs step S6.

In step s 6, master controller exits voltage detecting process.

Implementing above-mentioned input voltage measurement with guard method below in conjunction with Fig. 4 and be described further, details are as follows:

In step S101, the High Level AC Voltage accessed from electrical network live wire is carried out blood pressure lowering according to default transformation ratio and obtains low-voltage AC by voltage conversion processing module, and this low-voltage AC carries out rectifying and wave-filtering to export a low-voltage DC.

In step s 102, master controller judges whether the mode of operation of dish-washing machine is standby mode, washing mode or factory test mode, is, then perform step S103, no, then jump back to step S102.

In step s 103, master controller judges that the magnitude of voltage of low-voltage DC, whether more than the first voltage threshold and less than the second voltage threshold, is then to perform step S104, no, then perform step S111.

In step S104, master controller judges that the magnitude of voltage of low-voltage DC, whether less than tertiary voltage threshold value or more than the 4th voltage threshold, is then to perform step S105, no, then perform step S109.

In step S105, master controller proceeds by electric voltage exception timing and judges that chronometric data whether more than very first time threshold value, is then to perform step S106, and no, then electric voltage exception jumps back to step S102 after resetting.Wherein, very first time threshold value typically may be configured as 0.5 second, 1 second or other random time values in seconds.

In step s 106, master controller generates electric voltage exception flag data and this electric voltage exception flag data is stored in default memory space, and control washing operation is implemented load and quit work.

In step s 107, master controller judges that chronometric data whether more than the second time threshold, is then to perform step S108, and no, then electric voltage exception jumps back to step S102 after resetting.Wherein, very first time threshold value typically may be configured as 30 seconds, 60 seconds or other random time values in seconds.

In step S108, master controller drives alarm device send electric voltage exception alarm and start drainage system, and controls dish-washing machine and exit washing sequential, and performs step S113.

In step S109, master controller judges that the magnitude of voltage of low-voltage DC, whether between the 5th voltage threshold and the 6th voltage threshold, is, then electric voltage exception jumps back to step S102 after resetting, no, then perform step S110.

In step s 110, master controller judges to preset in memory space whether there is electric voltage exception flag data, be then to jump to step S105, no, then electric voltage exception jumps back to step S102 after resetting.

In step S111, master controller judges whether the mode of operation of dish-washing machine is factory test mode, is, then perform step S112, no, then perform step S113 after electric voltage exception resets.

In step S112, master controller judges voltage conversion processing module fault and drives alarm device to send fault alarm prompting, and carries out electric voltage exception clearing, and performs step S113.

In step S113, master controller exits voltage detecting process.

In embodiments of the present invention, the symbol assuming the first voltage threshold to the 6th voltage threshold is V1-V6, then the magnitude relationship between six voltage thresholds is V1 < V3 < V5 < V6 < V4 < V2, and the first voltage threshold can be selected according to practical situations to the value of the 6th voltage threshold.

In the present invention; by using above-mentioned input voltage measurement and guard method; the input voltage of dish-washing machine can be detected in real time; and washing operation enforcement load is closed when input voltage exception or voltage conversion processing module fault; and send alarm and opening water discharge system, thus reach in the case of input voltage is abnormal, dish-washing machine to be realized the purpose of protection.

nullThe embodiment of the present invention includes voltage conversion processing module and the input voltage measurement of master controller and protection circuit by using in dish-washing machine,According to default transformation ratio, the High Level AC Voltage accessed from electrical network live wire is carried out blood pressure lowering by voltage conversion processing module and obtain low-voltage AC,And this low-voltage AC is carried out rectifying and wave-filtering to export a low-voltage DC,Master controller correspondingly controls washing operation according to the mode of operation of dish-washing machine and the magnitude of voltage of low-voltage DC and implements load、Drainage system or the duty of alarm device,And according to the electric voltage exception degree of low-voltage DC correspondingly control washing operation implement load quit work,Or drive drainage system to start and control alarm device and carry out alarm,It is achieved thereby that the basic load controlling dish-washing machine when the input voltage overflow fixed working voltage scope of dish-washing machine quits work,To reach to protect the purpose of dish-washing machine,Solve prior art and cannot prevent dishwasher into operation and the low problem of reliability in the case of input voltage long-time overflow fixed working voltage scope.

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention.

Claims (7)

1. the input voltage measurement of a dish-washing machine and protection circuit, it is characterised in that described input voltage measurement includes with protection circuit:
Voltage conversion processing module, first input end and the second input connect electrical network live wire and electrical network zero line respectively, obtain low-voltage AC for the High Level AC Voltage accessed from described electrical network live wire being carried out blood pressure lowering according to default transformation ratio, and described low-voltage AC is carried out rectifying and wave-filtering to export a low-voltage DC;
Master controller, first general input/output port connects the outfan of described voltage conversion processing module, and second general input/output port, 3rd general input/output port and the 4th general input/output port implement load for washing operation with dish-washing machine respectively, drainage system and alarm device connect, magnitude of voltage for the mode of operation according to dish-washing machine and described low-voltage DC correspondingly controls described washing operation and implements load, described drainage system or the duty of described alarm device, correspondingly control the enforcement load of described washing operation according to the electric voltage exception degree of described low-voltage DC to quit work simultaneously, or drive described drainage system to start and control described alarm device and carry out alarm;
Described master controller correspondingly controls described washing operation according to the mode of operation of dish-washing machine and the magnitude of voltage of described low-voltage DC and implements load, described drainage system or the duty of described alarm device, correspondingly control the enforcement load of described washing operation according to the electric voltage exception degree of described low-voltage DC to quit work simultaneously, or drive described drainage system to start and control described alarm device and carry out alarm particularly as follows: described master controller judges the mode of operation of dish-washing machine, when dish-washing machine is in standby mode, when washing mode or factory test mode, the voltage of described low-voltage DC is detected by described master controller;When the magnitude of voltage of described low-voltage DC is not more than the first voltage threshold or is not less than the second voltage threshold, described master controller judges whether dish-washing machine is in factory test mode, the operation conditions of described voltage conversion processing module is determined according to judged result, and correspondingly control the duty of described alarm device, and stop voltage detecting process;When the magnitude of voltage of described low-voltage DC is more than the first voltage threshold and is less than the second voltage threshold, the magnitude of voltage of described low-voltage DC is compared by master controller with multiple voltage thresholds, electric voltage exception timing is carried out judge the electric voltage exception of described low-voltage DC further according to comparative result after, and correspondingly control described washing operation according to chronometric data and implement load and quit work or drive described drainage system to start and control described alarm device and carry out alarm, and stop voltage detecting process.
2. input voltage measurement as claimed in claim 1 and protection circuit, it is characterised in that voltage conversion processing module includes:
Transformator T1, commutation diode D1, filter capacitor C1, resistance R1, current-limiting resistance R2, diode D2 and electric capacity C2;
First end of the armature winding of transformator T1 and the second end are respectively first input end and second input of voltage conversion processing module 101, first end of the secondary windings of the anode connection transformer T1 of commutation diode D1, the negative electrode of commutation diode D1 is connected to first end of current-limiting resistance R2 altogether with the positive pole of filter capacitor C1 and first end of resistance R1, second end of current-limiting resistance R2 and the anode of diode D2 and the outfan that common contact is voltage conversion processing module of first end of electric capacity C2, the negative electrode of diode D2 meets DC source VCC, second end of the secondary windings of transformator T1 and the negative pole of filter capacitor C1, second end of resistance R1 and second end of electric capacity C2 are connected to ground altogether.
3. input voltage measurement as claimed in claim 1 and protection circuit, it is characterised in that master controller be model be the single-chip microcomputer of UPD78F8513A, UPD78F0524A or UPD78F0511.
4. a dish-washing machine; it is characterized in that; described dish-washing machine includes that washing operation implements load, drainage system, alarm device and the input voltage measurement described in any one of claims 1 to 3 and protection circuit, and described input voltage measurement loads with the enforcement of described washing operation respectively with protection circuit, described drainage system and described alarm device conductance are connected.
5. an input voltage measurement based on the input voltage measurement described in claim 1 and protection circuit and guard method, it is characterised in that described input voltage measurement includes with guard method:
A. the High Level AC Voltage accessed from described electrical network live wire is carried out blood pressure lowering according to default transformation ratio and obtains low-voltage AC by voltage conversion processing module, and described low-voltage AC carries out rectifying and wave-filtering to export a low-voltage DC;
B. master controller judges whether the mode of operation of dish-washing machine is standby mode, washing mode or factory test mode, is, then perform step C, no, then jump back to step B;
The most described master controller judges that the magnitude of voltage of described low-voltage DC, whether more than the first voltage threshold and less than the second voltage threshold, is then to perform step D, no, then perform step E;
The magnitude of voltage of described low-voltage DC is compared by the most described master controller with multiple voltage thresholds, electric voltage exception timing is carried out judge the electric voltage exception of described low-voltage DC further according to comparative result after, and correspondingly control described washing operation according to chronometric data and implement load and quit work or drive described drainage system to start and control described alarm device and carry out alarm, and execution step F;
The most described master controller judges whether dish-washing machine is in factory test mode, determines the operation conditions of described voltage conversion processing module according to judged result, and correspondingly controls the duty of described alarm device, and perform step F;
The most described master controller exits voltage detecting process.
6. input voltage measurement as claimed in claim 5 and guard method, it is characterised in that described step D specifically includes following steps:
The most described master controller judges that the magnitude of voltage of described low-voltage DC, whether less than tertiary voltage threshold value or more than the 4th voltage threshold, is then to perform step D2, no, then perform step D6;
The most described master controller proceeds by electric voltage exception timing and judges that chronometric data whether more than very first time threshold value, is then to perform step D3, and no, then electric voltage exception jumps back to described step B after resetting;
The most described master controller generates electric voltage exception flag data and described electric voltage exception flag data is stored in default memory space, and control washing operation is implemented load and quit work;
The most described master controller judges that described chronometric data whether more than the second time threshold, is then to perform step D5, and no, then electric voltage exception jumps back to described step B after resetting;
The most described master controller drives alarm device send electric voltage exception alarm and start drainage system, and controls dish-washing machine and exit washing sequential, and performs described step F;
The most described master controller judges that the magnitude of voltage of described low-voltage DC, whether between the 5th voltage threshold and the 6th voltage threshold, is, then electric voltage exception jumps back to step B after resetting, no, then perform step D7;
The most described master controller judges to preset the electric voltage exception flag data that whether there is last voltage detecting process in memory space, is then to jump to described step D2, and no, then electric voltage exception jumps back to described step B after resetting.
7. input voltage measurement as claimed in claim 5 and guard method, it is characterised in that described step E specifically includes following steps:
The most described master controller judges whether dish-washing machine is in factory test mode, is, then perform step E2, no, then perform described step F after electric voltage exception resets;
The most described master controller judges described voltage conversion processing module fault and drives alarm device to send fault alarm prompting, and carries out electric voltage exception clearing, and performs described step F.
CN201210499684.5A 2012-11-28 2012-11-28 Dish-washing machine and input voltage measurement thereof and protection circuit and method CN103845025B (en)

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CN2593243Y (en) * 2002-10-30 2003-12-17 广州威纳电子科技有限公司 Memory type dish washer computer controller
CN1979006A (en) * 2005-11-30 2007-06-13 海尔集团公司 Microwave-oven power-supply voltage monitoring circuit and method for protecting abnormal power-supply voltage
CN102142781A (en) * 2010-02-02 2011-08-03 汇鑫科技集成有限公司 Power supply, electric appliance with water purifying function and signal processing method for water treatment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1219004A1 (en) * 1999-08-20 2002-07-03 WRAP S.p.A. Device, system and method for monitoring a household electrical appliance
CN2593243Y (en) * 2002-10-30 2003-12-17 广州威纳电子科技有限公司 Memory type dish washer computer controller
CN1979006A (en) * 2005-11-30 2007-06-13 海尔集团公司 Microwave-oven power-supply voltage monitoring circuit and method for protecting abnormal power-supply voltage
CN102142781A (en) * 2010-02-02 2011-08-03 汇鑫科技集成有限公司 Power supply, electric appliance with water purifying function and signal processing method for water treatment

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