CN1087044C - Apparatus for preventing overheat of motor in washing machine and control method thereof - Google Patents
Apparatus for preventing overheat of motor in washing machine and control method thereof Download PDFInfo
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- CN1087044C CN1087044C CN97113076A CN97113076A CN1087044C CN 1087044 C CN1087044 C CN 1087044C CN 97113076 A CN97113076 A CN 97113076A CN 97113076 A CN97113076 A CN 97113076A CN 1087044 C CN1087044 C CN 1087044C
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- motor
- washing machine
- position detection
- rotor position
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Abstract
The present invention relates to a device for preventing the overtemperature of a motor in a washing machine, which comprises a controller, an overtemperature circuit breaking part and a rotor position detecting part, wherein the controller is used for outputting a control signal and converting an AC voltage into a DC voltage; one end of the overtemperature circuit breaking part is connected to a power cord of the DC voltage(+) converted by the controller; the rotor position detecting part is connected to the other end of the overtemperature circuit breaking part, and is used for detecting the position of a motor rotor; thus, DC power can be cut off at the time of the overtemperature of a motor in a washing machine.
Description
The present invention relates to a kind of device and control method thereof that in washing machine, prevents motor overheating.
The brushless direct-current of washing machine (BLDC) motor generally includes one and is used to replace brush or the transistor of commutator or switching device.This BLDC motor does not comprise by the commutator that is connected to brush and extracts power that the generator (not shown) produces or the device that power is provided to the rotor (not shown) of motor (not shown), therefore, there is not the danger that fire casualties such as gas burst take place owing to electric spark in the BLDC motor.In addition, the life-span of BLDC motor ratio has the confidential length of brush direct current.Therefore, the BLDC motor is widely used as washing motor in washing machine.
Below to the habitual device that be used to prevent motor overheating in washing machine be described with reference to accompanying drawing.
Fig. 1 is illustrated in the schematic block diagram of the habitual device that is used to prevent motor overheating in the washing machine.Fig. 2 represents the working method of crossing the thermal cut-out part of operating according to the degree of superheat that is fixed on the motor in the washing machine.
With reference to Fig. 1, be used in washing machine prevent that the habitual device of motor overheating from comprising power unit 13, button input and display part 11, controller 12, generator 16, rotor position detection part 14, and cross thermal cut-out part 15.
If provide power supply from power supply 13 to button input and display part 11, button input and display part 11 just allow the user to select the function of needs by operation push-button, and show chosen function and mode of operation thereof.Controller 12 comprises a microprocessor (not shown) and various control circuit (not shown).The signal that controller 12 is imported from button according to the user is that the function that the user selects is controlled corresponding operation, and drives peripheral equipment.Generator 16 converts mechanical signal to the signal of telecommunication according to the control signal of controller 12, thus the response washing machine driving and produce power.This is in provides a BLDC motor in the generator 16.Detect the position of the rotor that is used to drive generator 16 with rotor position detection part 14, and provide and the corresponding signal of detected rotor-position to controller 12.Cross thermal cut-out part 15 circuit of during the winding coil of generator 16 is overheated, cutting off the electricity supply, thus protection generator 16.That is to say, used thermal cut-out part 15 to detect the temperature of generator 16, so that determine whether generator 16 is overheated.Cross the form that thermal cut-out part 15 has the on/off switch,, thereby prevent that generator 16 is overheated so that carry out the on/off operation according to the degree of superheat of generator 16.Have a plurality of connectors 17 and 17a by power line with power unit 13, controller 12 and cross thermal cut-out part 15 and link together.
The working method of the habitual device that is used to prevent motor overheating in washing machine below will be described.
As shown in fig. 1, when the user makes washing machine work by key-input operation, if overload or fault, rotor position detection part 14 detects the rotor-position of generator 16, and the rotor position detection signal of corresponding measured rotor position is offered controller 12.At this moment, the controller 12 that receives the rotor position detection signal is just controlled the driving of the BLDC motor of generator 16 according to this rotor position detection signal.
During driving the BLDC motor, if the temperature of the coil in the motor reaches predetermined temperature or this more than temperature, the thermal cut-out part 15 of crossing that is connected to the BLDC motor just is turned off, as shown in Figure 2.So just cut off power line, thus prevent overheated.At this moment, because power line is cut off, washing machine will be shut down.Because this cause, the user is difficult to judge why washing machine shuts down.
Power line is connected to the thermal cut-out part 15 excessively on the BLDC motor that is fixed on generator 16, so that can cut off the electricity supply.Consequent problem is the circuit more complicated, and the line length increase, therefore needs more connector.
The present invention relates to a kind of device that is used to prevent motor overheating in washing machine, it has been got rid of basically because the restriction of prior art and the problem that defective causes.
The purpose of this invention is to provide a kind of device that is used to prevent motor overheating in washing machine, it can detect the fault that causes owing to motor overheating, so that show fault and be convenient to handling failure.
Another object of the present invention provides a kind of device that is used to prevent motor overheating in washing machine, has simplified the circuit of power line therein, and has reduced lead and number of connectors.
A further object of the present invention provides a kind of method that prevents the motor overheating in the washing machine.
Hereinafter other features and advantages of the present invention will be described, these features can obtain from specification, or can be by practice of the present invention is understood.Main points of the present invention and other advantages can realize by the ad hoc structure described in specification and claims and the accompanying drawing.
In order to obtain above-mentioned advantage and to realize purpose of the present invention, as the explanation of summary and summary, be used in washing machine prevent that according to of the present invention the device of motor overheating from comprising a controller, be used to export control signal, and the AC voltage transitions is become dc voltage, cross the thermal cut-out part for one, the one end is connected to (+) power line by the dc voltage of controller conversion, an and rotor position detection part that was connected to the thermal cut-out part other end, be used to detect the position of rotor, so that cut off its DC power supply during the motor overheating in washing machine.
According to another aspect of the present invention, be used in washing machine prevent that the device of motor overheating from comprising a rotor position detection part, be used to detect the position of rotor, and when motor overheating, cut off the DC power line, thereby export a plurality of high, low signal, cross the thermal cut-out part for one, be used for switching the on/off of generator according to the signal that rotor position detection is partly exported, thereby cut off the electricity supply line, a display part that is used to show fault, so that allow the user when breaking down, can identify this fault by control signal owing to motor overheating, and controller, be used for partly providing the DC power supply to rotor position detection by crossing the thermal cut-out part, and a plurality of high according to from the rotor position detection part, low signal is controlled the driving of motor, and provides control signal to the display part.
In other respects, have the rotor position detection part and crossing in the washing machine of thermal cut-out part, be used to prevent that the method for motor overheating from may further comprise the steps: when the user makes washing machine work by key-input operation, determine because the motor overheating that overload or fault cause in washing/dehydrating cycle period of washing machine, during motor overheating, partly cut off the power supply that offers the rotor position detection part by crossing thermal cut-out, thereby produce a plurality of high, low signal, according to a plurality of high, low signal is determined motor overheating, and cut off the driving of motor, show the fault that produces owing to motor overheating, so that the user discerns this fault.
Certainly, above-mentioned summary and the following detailed description all are in order to demonstrate and to illustrate, and provide further explanation for the invention that claims limited.
The included accompanying drawing of specification provides further details of the present invention, has represented embodiments of the invention among the figure, and cooperates explanatory note to explain principle of the present invention.
In the accompanying drawings:
Fig. 1 is the schematic block diagram that is used to prevent the habitual device of motor overheating in washing machine;
Fig. 2 represents to come according to the degree of superheat that is installed in the motor in the general washing machine working method of crossing the thermal cut-out part of work;
Fig. 3 is the schematic block diagram that is used to prevent the device of motor overheating in washing machine of the present invention; And
Fig. 4 is a flow chart, is used for explaining the method that prevents motor overheating according to the present invention at washing machine.
Below want the most preferred embodiment of the present invention shown in the detailed description of the drawings.
As shown in Figure 3, be used in washing machine prevent that according to of the present invention the device of motor overheating from comprising power unit 23, controller 22, button input and display part 21, rotor position detection part 24 is crossed thermal cut-out part 25, generator 26, and connector 27.
The working method that is used to prevent the device of motor overheating according to of the present invention in washing machine below will be described.
As shown in Figure 3, detected rotor-position signal produces and drives signal in the Hall element of controller 22 according to rotor position detection part 24.BLDC motor with drive generator 26, when the temperature of the coil in being wound on the BLDC motor met or exceeded predetermined temperature owing to the overload of washing/dehydrating cycle period of washing machine or fault, the bi-metal plate of crossing thermal cut-out part 25 will cut off circuit.
At this moment, the power supply that slave controller 22 offers rotor position detection part 24 has just been cut off in the action of opening circuit of crossing thermal cut-out part 25.This power supply is the dc voltage that comes from the AC voltage transitions by controller 22.
Be cut off if offer the power supply of rotor position detection part 24, the Hall element of rotor position detection part 24 is with regard to cisco unity malfunction.
As a result, the holding wire Ha of Hall element, Hb, Hc will become mutually the same state, just high or low state.Controller 22 detects this state, and determines because fault has appearred in the generator 26 overheated Hall elements of rotor position detection part 24 that make.
Because the BLDC motor overheating of generator 26 when having caused Hall element to break down, BLDC motor and ancillary equipment just quit work, and the BLDC motor is no longer generated heat when detecting.If the fault of Hall element is owing to the BLDC motor overheating causes, button input and display part 21 just show that this fault is for user's identification.
Below to the method that prevent motor overheating in washing machine of the present invention be described with reference to Fig. 4.
To determine at first whether washing machine has occurred overload or fault (S101 and S102) in the key-input operation by user's selection key input and display part 21 in washing machine washing/dehydrating cycle period.When overload or fault appear in washing machine, detect the fault (S103) that is fixed on the Hall element on the BLDC motor by controller 22.
If controller 22 has detected this fault, cross thermal cut-out part 25 and just cut off the power supply that offers Hall element, thereby cut off BLDC motor and ancillary equipment (S104).Button input and display part 21 demonstrate fault at this moment, so that user's identification (S105).
As mentioned above, according to the present invention, be used in washing machine prevent that this devices and methods therefor of motor overheating has following advantage.
Because rotor position detection part and cross the thermal cut-out part and all be installed within the BLDC motor of generator just can reduce the quantity and the length thereof of power line.So just reduced number of connectors, thereby reduced manufacturing cost and improve assembly process.In addition, if owing in the circulation of the washing/dehydrating of washing machine, overload taking place or fault breaks down.The user can identify fault so that handle easily by button input and display part.So just provide reliability of products for the user.
Obviously, those skilled in the art can be used in washing machine prevent that the device of motor overheating from making various changes and modification to of the present invention under the condition that does not break away from spirit and scope of the invention.Therefore, in the scope of claims, covered this class change of the present invention and modification and equivalent scheme thereof.
Claims (10)
1. device that is used to prevent motor overheating in washing machine comprises:
A controller is used to export control signal, and the AC voltage transitions is become dc voltage; And be used for partly providing the DC power supply and according to the driving of controlling motor from a plurality of high and low signal of rotor position detection part, to provide control signal to rotor position detection to the display part by crossing the thermal cut-out part.
Cross the thermal cut-out part for one, the one end is connected to (+) power line by the dc voltage of controller conversion; Be used for switching the on/off of generator, thereby cut off the electricity supply line according to the signal that rotor position detection is partly exported;
A rotor position detection part was connected to the other end of thermal cut-out part, was used to detect the rotor-position of motor, so that cut off its DC power supply during the motor overheating in washing machine, exported a plurality of high and low signals; With
A display part is used to respond the control signal of self-controller, shows the overheated of motor, so that the user discerns it; Be used to show fault so that allow the user when breaking down, can identify this fault by control signal owing to motor overheating.
2. according to the device that is used to prevent motor overheating in washing machine of claim 1, wherein said motor is a brshless DC motor.
3. according to the device that is used to prevent motor overheating in washing machine of claim 1, wherein said rotor position detection partly is a Hall element.
4. according to the device that is used to prevent motor overheating in washing machine of claim 1, wherein said to cross thermal cut-out partly be a thermal protector, and whether it overheated being switched on/disconnect occur according to motor.
5. according to the device that is used to prevent motor overheating in washing machine of claim 1, wherein said control signal correspondence a plurality of high and low signal that rotor position detection is partly exported.
6. according to the device that is used to prevent motor overheating in washing machine of claim 5, wherein said a plurality of high and low signals are to produce owing to rotor position detection power supply partly is disconnected when the thermal cut-out part is cut off owing to motor overheating excessively.
7. one kind has the rotor position detection part and is crossing the method that is used to prevent motor overheating in the thermal cut-out washing machine partly, may further comprise the steps:
When the user makes washing machine when work by key-input operation, determine because the motor overheating that overload or fault cause in washing/dehydrating cycle period of washing machine;
During motor overheating, partly cut off the power supply that offers the rotor position detection part, thereby produce a plurality of high or low signals by crossing thermal cut-out; And
Determine that according to a plurality of high or low signals motor overheating cuts off the driving of motor, to show the fault that produces owing to motor overheating, so that the user discerns this fault.
8. according to the method for claim 7, the power supply that wherein offers the rotor position detection part is the dc voltage that is come by the AC voltage transitions.
9. according to the method for claim 7, wherein, the power supply that offers the rotor position detection part is cut off by the on/off operation of a thermal protector.
10. according to the method for claim 7, wherein, rotor position detection partly is a Hall element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97113076A CN1087044C (en) | 1997-05-15 | 1997-05-15 | Apparatus for preventing overheat of motor in washing machine and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97113076A CN1087044C (en) | 1997-05-15 | 1997-05-15 | Apparatus for preventing overheat of motor in washing machine and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1199788A CN1199788A (en) | 1998-11-25 |
| CN1087044C true CN1087044C (en) | 2002-07-03 |
Family
ID=5172567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97113076A Expired - Fee Related CN1087044C (en) | 1997-05-15 | 1997-05-15 | Apparatus for preventing overheat of motor in washing machine and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1087044C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109426179A (en) * | 2017-08-24 | 2019-03-05 | 杭州三花研究院有限公司 | Control circuit, control system and electronic pump |
| CN111058225B (en) * | 2018-10-15 | 2021-09-07 | 广东威灵电机制造有限公司 | Motor operation control method, motor operation control system, clothes treatment device and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5092097A (en) * | 1973-12-13 | 1975-07-23 | ||
| CN87208790U (en) * | 1987-06-07 | 1988-09-21 | 国营万众机器厂 | Electric computer controller for fully-automatic washer |
| KR950005177Y1 (en) * | 1992-12-12 | 1995-06-26 | Daewoo Electronics Co Ltd | Detection circuit of over-heating protector for washing motor |
-
1997
- 1997-05-15 CN CN97113076A patent/CN1087044C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5092097A (en) * | 1973-12-13 | 1975-07-23 | ||
| CN87208790U (en) * | 1987-06-07 | 1988-09-21 | 国营万众机器厂 | Electric computer controller for fully-automatic washer |
| KR950005177Y1 (en) * | 1992-12-12 | 1995-06-26 | Daewoo Electronics Co Ltd | Detection circuit of over-heating protector for washing motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1199788A (en) | 1998-11-25 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020703 Termination date: 20110515 |