CN100451224C

CN100451224C - Door lock device of washing machine

Info

Publication number: CN100451224C
Application number: CNB03130334XA
Authority: CN
Inventors: 具本权; 赵寅行
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2003-06-30
Filing date: 2003-06-30
Publication date: 2009-01-14
Anticipated expiration: 2023-06-30
Also published as: CN1566493A

Abstract

The present invention relates to a door lock device of a washing machine, which can lock a door through judging the rotational velocity. The washing machine of the present invention is composed of following components of a frequency / voltage converter, a comparator and the door lock device, wherein the frequency / voltage converter can convert the frequency of output signals of a velocity sensor into the voltage which is outputted; the comparator compares the output voltage of the frequency / voltage converter with the reference voltage, and then, high value or low value signals are outputted; the door lock device can switch the door of the washing machine in the locking state /unlocking state according to the output of the comparator. The door can be opened when the washing machine of the present invention rotates at the high velocity, and the door can be opened when the washing machine rotates at the low velocity, and thus, the effect that a safety accident of a user is prevented in advance is realized by low cost.

Description

The door lock assembly of washing machine

Technical field

The present invention relates to a kind of washing machine, relate in particular to a kind of door lock assembly (apparatus forlocking door of washing machine) of washing machine.

Background technology

In general, washing machine is that rubbing action, the washing stirr of the emulsification by washing agent, the current that rotate with washing stirr acts on the percussion on the washings and the machine that will remove attached to all contaminations above the object such as clothes, bedding.Washing machine can detect the amount and the kind of washings by sensor, thus the automatic setting washing methods, and washings are injected into suitable water level according to the amount and the kind of washings, under the control of micro computer, carry out washing process then.

The structure of conventional laundry apparatus as shown in Figure 1, it comprises with the lower part and forming: fairing 11 is used for AC power commonly used is carried out rectification; Motor 12 is used for providing revolving force to the sink of washing machine and agitator (pulsator) etc.; Drive unit 13, by possessing several insulation gate bipolar transistors (IGBT, Insulating Gate Bipolar Transistor) phase inverter (Inverter) constitutes, above-mentioned drive unit can be with the 1st pattern (mode) and the 2nd mode activated, wherein above-mentioned the 1st pattern is meant: provide 3 phases (U/V/W) power supply to above-mentioned motor 12, the 2nd pattern is meant: motor 12 is controlled to anti-phase, just the voltage inversion that will produce by the rotation of motor is to circuit; Switching mode electric power supply apparatus (SMPS, Switching Mode Power Supply) 14 can become the voltage transitions of fairing 11 outputs setting voltage (5V) back output; Velocity sensor 15 is used for detecting the rotary speed of above-mentioned motor 12; Braking resistor Rb can consume into heat with the generating voltage that the motor 12 of inversion takes place, thereby prevent the circuit damage in above-mentioned drive unit 13; Transistor (transistor) T1 is used for driving braking resistor Rb; Voltage check device 16 is used for detecting the output voltage values (level) of the above-mentioned fairing 11 that has passed through above-mentioned braking resistor Rb; Micro computer 17 can be controlled above-mentioned drive unit 13 and transistor T1 with reference to the output of above-mentioned velocity sensor 15 and voltage check device 16; Door switch (door switch) (omitting among the figure), be installed in the door a side, be used to detect user's the action of opening the door, and send the information of opening the door to above-mentioned micro computer 17; User interface (interface) 18 comprises touch panel or press key input section part etc., is used for importing the exercises instruction for the user; LCD (LCD) 19 is used to show the information such as operating state of washing machine; Buzzing (buzzer) 20; Host microcomputer (main micom) 21, for various loads such as drive motors 12, so that they can move according to the action command that the user imports by above-mentioned user interface 18, host microcomputer can comprise the various data communication of control signal with above-mentioned micro computer 17, and it can also go out the unusual of supply voltage by the communication check with above-mentioned micro computer 17, thereby drive above-mentioned LCD 19 and buzzer 21, so that warning message or buzz that their output has configured.

Elemental motion to washing machine with said structure is illustrated below.

At first, if the user has imported the washing instruction by user interface 18, host microcomputer 21 will be discerned this so, and to the certain control signal of micro computer 17 outputs, thereby drive load so that they are according to washing decimal coded (algorism) the condition operation of having set.

And host microcomputer 21 can also make it that operating state is shown, and can control buzzer 20 according to present operating state control LCD 19, makes it according to the operating state sound that gives a warning.

In addition, because above-mentioned washing machine can make the rotary speed of motor 12 reach hundreds if not thousands of commentaries on classics/per minutes (rpm) when carrying out the dehydration stroke, therefore also can be with identical speed rotation with joining sink of motor or agitator.

If this moment, the user was owing to slip up and to fail to recognize or having forgotten that washing machine is in runs up, thereby door is opened, with health particularly hand put in the sink, hand just may stir with sink one superhigh speed rotation in washings in, thereby injured.

Therefore in washing machine, be provided with when door is opened, the measure that sink is promptly stopped, but because sink moment is stopped, so still existence in the same old way of hazards.

Whether thereby the problem that the washing machine of prior art exists is: no matter be in the stroke of rotation at a high speed, always door can be opened, therefore make the user injured easily.

Summary of the invention

The present invention designs in order to solve aforesaid existing in prior technology problem, and purpose is to provide a kind of rotary speed of can judging, thus the door of washing machine locking device that door lock is lived.

The invention provides a kind of laundry, comprise with lower member constituting, that is: velocity sensor; Frequency is exported after can converting the output signal frequency of velocity sensor to voltage; Comparator can compare the output voltage and the reference voltage of frequency, then high value of output or low value signal; Door lock assembly can switch to locking-in state/released state with the door of washing machine according to the output of comparator.

The door lock assembly of washing machine of the present invention does not need other control device, and can utilize the output of velocity sensor to control automatically, thereby under the situation that makes the injured high speed rotation of user easily, door can not be opened, and when rotary speed becomes low speed, door can be opened, thereby can realize preventing in advance the effect of user's security incident with lower expense.

Description of drawings

Fig. 1 is the composition structure chart of conventional laundry apparatus;

Fig. 2 is the composition structure chart of the door lock assembly of washing machine of the present invention;

Fig. 3 is used for the oscillogram of action of frequency of key diagram 2.

The specific embodiment

Embodiment to the door lock assembly of washing machine of the present invention is described in detail with reference to the accompanying drawings.

Fig. 2 is the composition structure chart of the door lock assembly of washing machine of the present invention, and Fig. 3 is used for the oscillogram of action of frequency of key diagram 2.

The door lock assembly of washing machine of the present invention comprises with lower member constituting that is: frequency 31 as shown in Figure 2, and it can convert the output signal frequency that is input to the velocity sensor 15 in the above-mentioned micro computer 17 to voltage; Comparator 32 can compare the output voltage and the reference voltage of said frequencies/electric pressure converter 31, then high (high) signal of output or low (low) signal; Door lock assembly 33 can pin according to the output of above-mentioned comparator 32 door 30 with washing machine, so that it can not be opened.

Here, velocity sensor 15 can be exported certain pulse, and the frequency of pulse becomes certain ratio with the rotary speed of motor 12.Promptly the frequency of output pulse is lower under the situation of low speed, and the frequency of output pulse is higher under situation at a high speed.

Frequency 31 is during as Fig. 3 institute, and when velocity sensor 15 was output as low speed, it exported for example voltage of 2V, and when velocity sensor 15 was output as high speed, it exported for example voltage of 4V.

Comparator 32 can compare the output voltage of said frequencies/electric pressure converter 31 with the reference voltage of having set, if the output voltage of frequency 31 is than reference voltage height, it just exports " height " signal so, if the output voltage of frequency 31 is lower than reference voltage, it just exports " low " signal so.

Here, the reference voltage establishing method of comparator 32 is: at first the rotary speed of motor 12 is divided into low speed and high speed, then the output voltage of said frequencies/electric pressure converter 31 under the situation of low speed is set at reference voltage.Thereupon, when the rotary speed of motor 12 was high speed, comparator 32 is output " height " signal just.

Next, if when above-mentioned comparator 32 has been exported " height " signal, so above-mentioned door lock assembly 33 just pins door 30, thereby it can not be opened.When if above-mentioned comparator 32 has been exported " low " signal, so above-mentioned door lock assembly 33 is just removed the locking-in state of door 30, thereby it can be opened.

, need to possess a kind of structure on the door 30 here, promptly can couple together with the member of outside, thus the structure that door can not be opened, and in the present invention, door 30 itself has comprised this structure.And in the prior art, need to install in addition aforesaid can being connected, thereby the member that door can not be opened with the member of outside.In addition, door lock assembly 33 also needs to possess can be according to " height ", the parts that " low " signal moves of above-mentioned comparator 32 outputs, as solenoid valve (solenoid valve), attaching parts, promptly can drive along with the on/off (on/off) of the solenoid valve of moving according to the output signal of comparator 32, thus the parts that couple together with the member of above-mentioned door 30 1 sides.

A kind of embodiment that the structure of aforesaid door lock assembly 33 is just enumerated for explanation, in fact well-known lock construction can be improved, so that it can be according to the signal of telecommunication action of above-mentioned comparator 32 outputs, and in accompanying drawing of the present invention, do not show its concrete structure.

Course of action to door lock assembly of the present invention with said structure is elaborated below.

At first, the user opens the door 30 of washing machine, and washings is put into, and presses action key input washing instruction then.

Thereupon, the host microcomputer 21 of washing machine can be discerned this, and to above-mentioned micro computer 17 output control signals, thereby drive the various loads relevant with washing.

Next the control signal of 17 pairs of above-mentioned host microcomputers 21 of micro computer is discerned, and according to the washing decimal coded of having set (algorism), with reference to the output of above-mentioned velocity sensor 15, realizes washing, rinsing, dehydration.

In addition, frequency 31 can continue the output of velocity sensor 15 is discerned, if the rotary speed of motor 12 is a low speed now, velocity sensor 15 is with regard to output low frequency rate signal so, frequency 31 is understood for example 2V of output LOW voltages thereupon, next comparator 32 can be exported " low " signal, and door lock assembly 33 can make door 30 keep the state that the user can be opened thus.

But in the process of washing, rinsing, dehydration, stroke particularly dewaters, machine is in the state of high-speed cruising substantially, therefore velocity sensor 15 can be according to this high-speed case, the output high-frequency signal, frequency 31 is understood for example 4V of output HIGH voltage after recognizing high-frequency signal thereupon.

Next, comparator 32 can be exported " height " signal, so door lock assembly 33 can make door 30 keep the state that the user can't be opened.

Thereby motor 12 at a high speed rotation during, door 30 can keep locking-in states, if the speed of motor 12 has dropped to low speed, door 30 can switch to the state that can be opened again again so.

Claims

1, a kind of washing machine is characterized in that, comprises with lower member constituting:

Velocity sensor;

Frequency is after the frequency inverted of the signal that it can be exported velocity sensor becomes voltage value, with its output;

Comparator can compare the output voltage and the reference voltage of frequency, then high value of output or low value signal;

Door lock assembly can be according to the output of comparator, and the door of washing machine is switched to locking-in state or released state.

2, washing machine according to claim 1, it is characterized in that: the reference voltage establishing method of above-mentioned comparator is: at first the rotary speed of motor is divided into low speed and high speed, then the output voltage of described frequency under the situation of low speed is set at reference voltage.

3, washing machine according to claim 1 is characterized in that: above-mentioned door lock assembly comprises with lower member, that is: the solenoid valve that can move along with the output of above-mentioned comparator; Can with above-mentioned solenoid valve interlock, thereby with the syndeton of removing on the door lock or with the locking-in state of door.