CN1758002A

CN1758002A - Control device of refrigerator

Info

Publication number: CN1758002A
Application number: CN 200510100868
Authority: CN
Inventors: 张贤明; 陈再平; 杨新龙; 林小林
Original assignee: TCL Home Appliances Huizhou Co Ltd
Current assignee: TCL Home Appliances Huizhou Co Ltd
Priority date: 2005-10-27
Filing date: 2005-10-27
Publication date: 2006-04-12
Anticipated expiration: 2025-10-27
Also published as: CN100434845C

Abstract

A refrigerator controller is composed of detecting unit, executing unit, master control unit for receiving the signals from detecting unit and sending instructions to executing unit, and touch screen control unit arranged on the circuit board on the back of touch screen and consisting of touch screen control circuit (U202 chip), touch screen circuit, back light circuit, alarm circuit, LCD controller and auxiliary circuit.

Description

A kind of control device of refrigerator

Technical field

The present invention relates to refrigerator control technology field, be specifically related to a kind of refrigerator with touch-screen control device.

Background technology

Arrival along with science and technology development, digital times, being growing more intense of domestic and international market competition, people are also more and more higher to the requirement of various household appliances, not only require good product performance, reliable in quality, and also more and more higher to the requirement of the aspects such as visual effect of the hommization of the operation of product and product appearance.

Various household electrical appliance with touch screen structure easy to operate, attractive in appearance have appearred in recent years on the market, as the disclosed touch electromagnetism stove of Chinese CN200420047169 patent " a kind of touch control induction circuit that is used for electromagnetic oven ", also have other as having touch-screen type micro-wave oven etc.

But, the control of refrigerator at present still adopts mechanical type to press key control mostly, and it is realized by mechanical connecting structure that mainly repeatedly use is easy to generate aging, wearing and tearing, situations such as loose contact, and be subjected to the restriction of structural member easily, because the connection that mechanical button polygamy closes structural member is operated, when structural member unreasonable, when not firm, processing ease lost efficacy, and general access times are no more than 200,000 times.And notification number is CN1521476's " contact witch and have the refrigerator of contact witch " disclosed soft-touch control that can be used for refrigerator, described switch along the arc sections of the matrix inner face of the circular discoid that is installed on surface plate of door by pushing the touch pad that semicircular in shape roughly is installed and can moving forward and backward, and by with the signaling switch adjacency that is installed in dish portion bottom surface, prop up the elastic force of breasting spring and rotate the movable platen that the actuator that makes signaling switch leaves contact with axle, and leave the grab of setting in the both sides of movable platen; Be pressed into and return the place ahead by spring force after rotating and engage the engaging axle formation of rotating, make the signaling switch action by pushing touch pad or pull operation with the prevention touch pad with grab.Its disclosed soft-touch control front portion is equipped with touch pad, but this soft-touch control is still kept away the break-make that the connection of unavoidable dependence mechanical structured member realizes switching signal, and this construction of switch complexity, and practicality is not strong.

Summary of the invention

Problem to be solved by this invention provides a kind of easy to operate, service-strong refrigerator touch-screen control device.

The present invention is achieved through the following technical solutions:

Design a kind of control device of refrigerator, include: detecting unit is used to detect refrigerator inside external temperature and refrigerator door open-close signal; Performance element is used for reducing and improving internal temperature of refrigerator; And main control unit, after handling, the signal of reception detecting unit issues instructions to the execution moving cell; This device also comprises and being provided with and display refrigerator operation conditions and the touch-screen control module that is connected with main control unit.

The telecommunication circuit that main control unit comprises the control circuit that is connected with the main control chip control end, the power supply of power supply and phase detecting circuit, the reset circuit that is connected with the reset terminal of main control chip, the sensor circuit that is connected with the main control chip input is provided and is used to handle main control chip and touch screen unit signal of communication to main control chip.Performance element includes output magnetic valve and compressor assembly, and compressor assembly comprises the compressor that is connected with main control unit by protector.Detecting unit comprises refrigerator temperature sensor, freezer temperature sensor, refrigerating chamber R evaporator temperature sensor, environment temperature sensor and the refrigerator door open-close that connects with main control unit respectively.

Described touch-screen control module is arranged on the circuit board at refrigerator touch-screen back, the touch-screen control module includes the touch-screen governor circuit of chip U202 composition and the touch screen circuitry that is connected with the governor circuit chip interface, backlight circuit, warning circuit, liquid crystal display control circuit and communicate by letter and auxiliary circuit.

Warning circuit includes triode TR201, and the base stage of triode TR201 is connected in series with the PIN1 of chip U202, and the collector output of triode TR201 connects buzzer BUZ201; Backlight circuit comprises triode TR202, and the base stage of triode TR202 is connected in series with the PIN10 of chip U202, and the collector output of triode TR202 connects display led 201.

Liquid crystal display control circuit is made up of the LCD LCD201 circuit of lcd drive chip U201 circuit and driving thereof.

Communication and auxiliary circuit include reset circuit and shaping circuit, the collector output of triode TR204 in the reset circuit is connected with the π formula filter circuit of resistance R 224, C213, C214 composition, π formula filter circuit connects with the PIN11 pin of governor circuit chip U202, and the serial output pin 11 of shaping circuit chip U203 is connected in series with the PIN18 of governor circuit chip U202.

The refrigerator touch-screen of safety glass processing and fabricating comprises viewing area and key zone.The touch-screen middle and upper part is provided with temperature of refrigerating chamber viewing area, freezer temperature viewing area, soft freezing chamber temperature viewing area, and the touch-screen middle and lower part is provided with key is set, and touch-screen both sides key zone also is provided with the function corresponding key.

The present invention compared with prior art has following advantage:

Refrigerator touch-screen control device provided by the present invention, adopt touch-screen type by key control, the user realizes the button that can directly push on the touch-screen by touch of manipulating of refrigerator, the operating control signal that is produced sends to main control unit after receiving processing by the touch-screen control module circuit that is arranged at the touch-screen back, main control unit issues instructions to performance element and the relevant original paper of carrying out after analysis and judgement, realize the control to refrigerator.The touch-screen type control device that this invention provides has been cancelled mechanical connected mode, is not subjected to aging and unstable influence of structural member, makes the reliability of this control mode improve greatly, has reduced the cost that exploitation is made; In addition liquid crystal, backlight technology form beautiful, giant-screen animation and show that appearance looks elegant is generous to adopt the good materials such as safety glass of irritability to make touch-screen.

Description of drawings

Fig. 1 is a way circuit schematic diagram of the present invention;

Fig. 2 is the circuit diagram of main control unit 46 among Fig. 1;

Fig. 3 is the circuit diagram of touch screen unit 31 among Fig. 1;

Fig. 4 is the surface structure schematic diagram of touch-screen.

Specific embodiments

The invention will be further described below by specific embodiment:

A kind of control device of refrigerator includes detecting signal unit, main control unit, performance element and touch-screen control module.

Detecting signal unit is used to detect refrigerator inside external temperature and refrigerator door open-close signal, detecting unit includes refrigerator temperature sensor 28, freezer temperature sensor 29, refrigerating chamber R evaporator temperature sensor 30, environment temperature sensor 32 and the refrigerator door open-close 34 that connects with main control unit 46.Each temperature sensor is detected temperature signal, and the switching signal of refrigerator door open-close passes to main control unit, is handled by the main control unit analysis and judgement again.

Issue instructions to performance element after the signal analysis judgment processing of main control unit 46 reception detecting units and control the refrigerator operation.Main control unit comprise the control circuit 3 that is connected with main control chip 4 control ends, to main control chip provide power supply power supply and phase detecting circuit 1, the reset circuit 2 that is connected with the reset terminal of main control chip, the sensor circuit 6 that is connected with the main control chip input, be used to handle telecommunication circuit 5 that main control chip communicates by letter with touch screen unit and the clock circuit 7 that clock is provided for main control chip.

Referring to Fig. 2: power supply and phase detecting circuit 1 be for system provides power supply, and the phase place situation of alternating current is provided, for system's control provides the basis; Civil power is introduced by terminal CN1, behind insurance FUS101 and piezo-resistance ZNR101 again after transformer T101 transformation, the secondary low-voltage that obtains AC15V of T101.The voltage of AC15V is through diode D105 rectification, form the half-wave sinusoidal voltage, this voltage is through resistance R 107 and R108 dividing potential drop rear drive triode TR101,0 degree phase place at line voltage begins, triode TR101 has gradually by the end of conducting, the voltage of resistance R 152 becomes 0.7V from+5V, and a trailing edge can appear in the phase-detection pin PIN13 of main control chip 4.In addition, transformer T101 secondary voltage carries out full-bridge rectification through the bridge circuit that diode D101～D104 forms, by capacitor C 112 and C104 filtering, obtain+12V voltage after three terminal regulator U101 (LM7812CV) step-down, in order to as relay, driving voltage backlight ,+12V obtain+5V voltage after three terminal regulator U107 (LM7805CV) step-down again, as the power supply of main control chip 4, sensor circuit 6, telecommunication circuit 5 and reset circuit 2.

Reset circuit 2 starts for system is normal gives security; The π formula filter circuit that the collector output of triode TR106 is formed through capacitor C 101, C102, resistance R 111 is connected to the RESET pin PIN22 of main control chip 4, system powers on, and TR106 is conducting gradually, C105 charging simultaneously, the RESET pin gradually becomes high level, thereby chip is finished reset operation.R111, C101, C102 have formed the filtering of π formula, guarantee that RESET pin PIN22 does not have voltage pulsation.

Control circuit 3 mainly is that the requirement of system output is removed to control solenoid directional control valve, illuminating lamp and compressor.A) gate light control circuit: after system sent and opens the illuminating lamp instruction, PIN28 became high voltage by low-voltage, and output is through resistance R 129 current limlitings, after driving triode TR104 conducting, the relay coil of RY101 contact forms the loop, the RY101 closing of contact, and terminal CN6 connects lamp and lights.The moment of the relay conducting of RY101 contact, high counter electromotive force can appear in two ends, and the effect of diode D107 is the loop that forms counter electromotive force, the device in the holding circuit.B) compressor Control Cprant: after system sent and starts the compressor instruction, PIN27 became high voltage by low-voltage, and output is through resistance R 128 current limlitings, after driving triode TR103 conducting, the relay coil of RY102 contact forms the loop, the RY102 closing of contact, and press starts.The relay conducting moment of RY102 contact, high counter electromotive force can appear in two ends, and the effect of diode D106 is the loop that forms counter electromotive force, the device in the holding circuit.And compressor is inductive load, and powered on moment also bigger counter electromotive force can occur, and resistance R 153 and capacitor C 132 are formed the capacitance-resistance discharge loops, form the loop of compressor counter electromotive force, are responsible to replace the device in the circuit.C) solenoid valve control circuit: when a certain way solenoid valve needs positive pulse, after phase detecting circuit detects the zero passage rising edge of civil power, give the pulse in this road, the magnetic valve that connects with the PIN20 pin is an example: system gives negative pulse of PIN20, photoelectronic coupler U104 must conduct, and control voltage is by resistance R 139, and R121 is added on the control end of controllable silicon SCR 102, controllable silicon SCR 102 conductings, terminal CN2 goes up the magnetic valve that connects and obtains the positive pulse startup.Magnetic valve is an inductance element, has counter electromotive force when powering on, and has formed resistance capaciting absorpting circuit by resistance R 135 and capacitor C 119, absorbs the counter electromotive force that magnetic valve produces.

The PIN23 of main control chip 4, PIN24 pin connect oscillator TX101.The model of chip U106 is: UPD789188CT, main control chip 4 are brains of system's operation, and by to the sensor signal analysis, according to the setting value of touch screen circuitry, the control magnetic valve and the actuating of relay finally meet the requirements; Oscillator XT101 provide time sequential pulse to chip, guarantees the chip operate as normal.The information that the information that control chip obtains according to communication, sensor spread out of, the information that peripheral components such as door switch provide, the action of decision press, lamp and each magnetic valve.

The effect of telecommunication circuit 5 is when main control unit is communicated by letter with touch screen unit signal to be carried out filtering, guarantees that signal correctly is identified; Agreement according to prior regulation, control chip is exported different high-low levels by PIN4 constantly in difference, capacitor C 134 can suppress interference, the shaping circuit that reverser U109 (74HC04) forms has carried out shaping to the high-low level that PIN4 sends, the waveform that makes output is more near perfect condition, the action that the notice touch display screen should carry out.Agreement according to the rules, main control chip carries out read operation to the high-low level of PIN15 constantly in difference, obtains the information that touch display screen is passed back.

Sensor circuit 6 passes to main control chip to the signal of the temperature of freezer compartment of refrigerator, refrigerating chamber, soft freezing chamber and refrigerator door open-close; Sensor itself is a thermal resistance, and the resistance value of sensor is different under different temperatures.Dividing potential drop that sensor passes through and divider resistance R116, R117, R118, R119 connect, different temperature, the sensor resistance difference, R116, R117, R118, R119 divide voltage also different, thereby the voltage that is added in main coremaking sheet PIN8, PIN7, PIN6, PIN5 is also different, thereby main control chip obtains different temperature values.

Clock circuit 7 can guarantee clock operation accurately, and the condition that is had control the time is provided for system.The chip U102 of clock circuit 7 and U108 are the chips with I2C interface function, main control chip is by different addresses, can carry out read-write operation to chip U102 and U108, main control chip writes chip U102 to set condition, after the outage, the data of U102 storage can not lost, and after powering on, all read the store status of U102 at every turn.Accurately timing of chip U108, he can revise the time of storage, and he can be to add on the time in storage for per second, and power consumption is very low, and capacitor C 36 electric energy stored are enough to guarantee that he worked 10 hours, thereby make our refrigerator power down several hrs, the back clock that powers on need not be readjusted.

Touch-screen control module 31 is arranged on the circuit board at refrigerator touch-screen back, the touch-screen control module includes the touch-screen governor circuit 12 of chip U202 composition and the touch screen circuitry 8 that is connected with governor circuit 12 chip U202 interfaces, backlight circuit 92, warning circuit 91, liquid crystal display control circuit and communication and auxiliary circuit 13.Its chips U202 adopts HT46R47 type single-chip microcomputer.

Touch-screen is under down state not, and its resistance value is tens megohms, and the common port output of touch-screen is low. and during level, after divider resistance and the touch-screen dividing potential drop, the input voltage of governor circuit chip U202 is a high level.And after touch-screen was pressed, its resistance value was tens K ohms, and during the common port output low level of touch-screen, after divider resistance and the touch-screen dividing potential drop, the input voltage of governor circuit chip U202 is a low level.

Touch-screen adopts the pressure type digital touch-screen, and according to the needs of refrigerator, whole touch screen is divided into viewing area and key zone, and key zone is provided with different buttons, and smart key 14 is set refrigerator and entered/withdraw from intelligent mode; Temperature of refrigerating chamber viewing area 15 shows temperature of refrigerating chamber; Time showing zone 16 shows the current time; Freezer temperature viewing area 17 shows freezer temperature; Soft freezing chamber temperature viewing area 18 shows the soft freezing chamber temperature; Separate locking key 19 and remove latch mode, but make refrigerator enter set condition; Speed refrigeration key 20 is set refrigerator and is entered/withdraw from fast refrigeration pattern; The open/close state of refrigeration on ﹠ off switch 21 control refrigerating chambers; Subtract key 22 when design temperature or time, during the setting of response flicker, this key can make this value reduce by 1 unit.Long by subtracting under this key analog value meeting fast; Key 23 is set switches set condition, several down by this key continuously under the normal condition, setting will change in the following order: temperature＞" AM " that the temperature that the temperature that refrigerating chamber is set＞refrigerating chamber is set＞ice milk chamber is set or time hour position＞current refrigerator smart key 14 that " FM " flicker＞current refrigerator shows are set refrigerator and are entered/withdraw from intelligent mode; Temperature of refrigerating chamber viewing area 15 shows temperature of refrigerating chamber; Time showing zone 16 shows the current time; Freezer temperature viewing area 17 shows freezer temperature; Soft freezing chamber temperature viewing area 18 shows the soft freezing chamber temperature; Separate locking key 19 and remove latch mode, but make refrigerator enter set condition; Speed refrigeration key 20 is set refrigerator and is entered/withdraw from fast refrigeration pattern; The open/close state of refrigeration on ﹠ off switch 21 control refrigerating chambers; Subtract key 22 when design temperature or time, during the setting of response flicker, this key can make this value reduce by 1 unit.Long by subtracting under this key analog value meeting fast; Key 23 is set switches set condition, several down by this key continuously under the normal condition, setting will change in the following order: the temperature that temperature＞" AM " that the temperature that the temperature that refrigerating chamber is set＞refrigerating chamber is set＞ice milk chamber is set or time minute position＞refrigerating chamber that time hour position＞current refrigerator shows that " FM " flicker＞current refrigerator shows are set, when pressing without any button after 5 seconds, during again by this key, again can be by above cycling; Add key 24 when design temperature or time, during the setting of response flicker, this key can make this value increase by 1 unit.Long by adding in this key analog value meeting fast; The ON/OFF of freeze switch key 25 controls freezing (soft freezing chamber), refrigerating chamber and soft freezing chamber be ON/OFF simultaneously; The freezing key 26 of speed is set refrigerator and is entered/withdraw from the quick-frozen pattern.The temperature that the time minute position that shows＞refrigerating chamber is set, when pressing without any button after 5 seconds, during again by this key, again can be by above cycling; Add key 24 when design temperature or time, during the setting of response flicker, this key can make this value increase by 1 unit.Long by adding in this key analog value meeting fast; The ON/OFF of freeze switch key 25 controls freezing (soft freezing chamber), refrigerating chamber and soft freezing chamber be ON/OFF simultaneously; The freezing key 26 of speed is set refrigerator and is entered/withdraw from the quick-frozen pattern.

Carry out various settings by touching each button of pushing on the touch-screen gently when manipulating, send signal and pass temperature sensor 28 by each input element refrigerating chamber, freezer temperature sensor 29, refrigerating chamber R evaporator temperature sensor 30, environment temperature sensor 32, door switch 34, the signal that soft freezing chamber temperature sensor 41 produces passes to and carries out analysis and judgement on the main control unit 46, issues instructions to the equipment or the element refrigerating chamber magnetic valve 42 of performance element, soft freezing chamber magnetic valve 43, refrigerating chamber magnetic valve 44, compressor 38, buzzer BUZ201 on the touch screen unit 31, refrigerating chamber illuminating lamp 35 is carried out corresponding action.

Referring to Fig. 3, the signal of touch-screen governor circuit 12 collection touch circuit and main control unit 46 is analyzed the signal of gathering, and sends action command to backlight with warning circuit and liquid crystal control circuit, and upwards level controller is reported the work at present state.Send signal receive the instruction of main control unit 46 when touch-screen governor circuit 12 after, the high level of the PIN1 of governor circuit chip U202 output then, triode TR201 conducting, buzzer BUZ201 sounds prompting operation person.Equally, according to the high level of the PIN10 of system requirements governor circuit chip U202 output, triode TR202 conducting, LED201 connects, backlight lightening.Simultaneously touch-screen governor circuit 12 sends the liquid crystal display control circuit that instruction forms for HT1621 type lcd drive chip U201, and by the running status and the ruuning situation of the LCD LCD201 display refrigerator of its driving.

Communication and auxiliary circuit 13 are used to support governor circuit 12 work and maintenance and main control unit 46 reliably to get in touch, communication and auxiliary circuit 13 comprise the reset circuit that the triode TR204 of the PIN11 that is connected in governor circuit chip U202 forms, and the shaping circuit of chip U203 (74HC04) composition.System powers on, triode TR204 conducting gradually, capacitor C 212 chargings simultaneously, the PIN11 RESET pin of U202 gradually becomes high level, thereby chip is finished reset operation, and resistance R 224, C213, C214 have formed π formula filter circuit and guaranteed that the RESET pin does not have voltage pulsation.Agreement according to prior regulation, governor circuit chip U202 exports different high-low levels by PIN18 constantly in difference, C215 can suppress interference, chip U203 has carried out shaping to the high-low level that PIN18 sends, the waveform that makes output is more near perfect condition, the action that the notice touch display screen should carry out.Agreement according to the rules, governor circuit chip U202 carries out read operation to the high-low level of PIN18 constantly in difference, obtains the information that the touch-screen control module is passed back.

The giant-screen touch-screen of touch-screen control device provided by the present invention also has the function that animation shows: the refrigerating chamber open mode: the refrigerating chamber symbol of refrigeration switch 21 dynamically shows, circulates for people's the cold air of feeling at refrigerating chamber.The refrigerating chamber open mode: the refrigerating chamber symbol of freeze switch 25 dynamically shows, circulates for people's the cold air of feeling at refrigerating chamber.Temperature of refrigerating chamber viewing area 15, freezer temperature viewing area 17, soft freezing chamber temperature viewing area 18 or be in refrigerating state: this arc symbol above chamber dynamically shows, moves for people's the cold air of feeling the inside.When refrigerator is in intelligence, speed refrigeration or fast freezing state: the dynamic Alternation Display of frame around intelligent key 14, speed refrigeration key 21, the fast freezing key 25, the state that reminds people is current.By above-mentioned measure, improve the high added value of refrigerator, promote refrigerator to update, satisfy the demand of people to high-grade refrigerator.

Claims

1, a kind of control device of refrigerator, include: the detecting unit that is used to detect refrigerator inside external temperature and refrigerator door open-close signal, be used to reduce and improve the performance element of internal temperature of refrigerator and receive the signal of detecting unit and issue instructions to the main control unit (46) of load drive unit, it is characterized in that: also comprise being provided with and display refrigerator operation conditions and the touch-screen control module (31) that is connected with main control unit.

2, control device of refrigerator according to claim 1 is characterized in that: described main control unit comprise the control circuit (3) that is connected with main control chip (4) output, to main control chip provide power supply power supply and phase detecting circuit (1), the reset circuit (2) that is connected with the reset terminal of main control chip, the sensor circuit (6) that is connected with the main control chip input, be used to handle the telecommunication circuit (5) of main control chip and touch screen unit signal of communication and the clock circuit (7) that clock is provided for system.

3, control device of refrigerator according to claim 1; it is characterized in that: described performance element includes output magnetic valve and compressor assembly (39), and compressor assembly comprises the compressor (38) that is connected with main control unit (46) by protector (40).

4, control device of refrigerator according to claim 1, it is characterized in that: described detecting unit includes refrigerator temperature sensor (28), freezer temperature sensor (29), refrigerating chamber R evaporator temperature sensor (30), environment temperature sensor (32) and the refrigerator door open-close (34) that connects with main control unit.

5, control device of refrigerator according to claim 1, it is characterized in that: described touch-screen control module is arranged on the circuit board at refrigerator touch-screen back, the touch-screen control module includes the touch-screen governor circuit (12) of chip U202 composition and the touch screen circuitry (8) that is connected with the pin of governor circuit (12) chip U202, backlight circuit (92), warning circuit (91), liquid crystal display control circuit and communication and auxiliary circuit (13).

6, control device of refrigerator according to claim 5, it is characterized in that: described warning circuit includes triode TR201, the base stage of triode TR201 is connected in series with the PIN1 of chip U202, and the collector output of triode TR201 connects buzzer BUZ201; Backlight circuit comprises triode TR202, and the base stage of triode TR202 is connected in series with the PIN10 of chip U202, and the collector output of triode TR202 connects display led 201.

7, control device of refrigerator according to claim 5 is characterized in that: described liquid crystal display control circuit is made up of the LCD LCD201 circuit (11) of lcd drive chip U201 circuit (10) and connection thereof.

8, control device of refrigerator according to claim 5, it is characterized in that: described communication and auxiliary circuit include reset circuit and shaping circuit, the collector output of triode TR204 in the reset circuit is connected with the π formula filter circuit of resistance R 224, C213, C214 composition, π formula filter circuit connects with the PIN11 pin of governor circuit chip U202, and the serial output pin 11 of shaping circuit chip U203 is connected in series with the PIN18 of governor circuit chip U202.

9, control device of refrigerator according to claim 5 is characterized in that: described safety glass matter refrigerator touch-screen comprises viewing area and key zone.

10, control device of refrigerator according to claim 9, it is characterized in that: described touch-screen middle and upper part is provided with temperature of refrigerating chamber viewing area 15, freezer temperature viewing area 17, soft freezing chamber temperature viewing area 18, the touch-screen middle and lower part is provided with key (23) is set, and touch-screen both sides key zone also is provided with the function corresponding key.