CN2747496Y

CN2747496Y - Contact screen for domestic air conditioner

Info

Publication number: CN2747496Y
Application number: CNU2004200958703U
Authority: CN
Inventors: 黄永毅; 黄松炯; 黄东
Original assignee: TCL Corp
Current assignee: TCL Corp
Priority date: 2004-11-23
Filing date: 2004-11-23
Publication date: 2005-12-21
Anticipated expiration: 2014-11-23

Abstract

Disclosed is a contact screen for domestic air conditioner, and a capacitive type contact screen is fixed to a mounting rack and it is inlaid on a window of a control panel of an indoor cabinet machine of the conditioner and clings to the back of an armor plate glass which is likewise inlaid on the window. The contact screen is positioned at the upper side of the back of the armor plate glass. The contact screen is a piece of four-layer compound glass screen, whose surface is applied with a layer of silica soil glass protection layer and inner surface and each interlayer are applied with a layer of transparent conductive film. The contact screen is connected with a control circuit, and a chip in the control circuit can figure out the position of the contact point according to the strength of the signal from the contact screen, and then the high level can be exported to control the actions of peripheral devices. The utility model makes a key on the contact screen be isolated from the operating finger, and it utilizes a coupling capacitance and a current formed by the human body and the surface of the contact screen to judge the pressing position. Thus the utility model has simple structure, convenient operation, strong associative perception, terseness, fluency and high added value of the product.

Description

A kind of domestic air conditioner touch-screen

Technical field

The utility model relates to the indoor cabinet-type air conditioner of a kind of domestic air conditioner, is meant the operation control flow on the indoor cabinet-type air conditioner of a kind of touch domestic air conditioner especially.

Background technology

At present, in the air-conditioner product, panel button generally all adopts touch-switch or thin film switch etc., and this class construction of switch all needs human body and button that direct the contact arranged, and by the moment transmission, carries out mechanical button operation; This class prior art all has following shortcoming: 1, button weares and teares easily and wears out, and mechanical life is short, and button easily lost efficacy after use a period of time; 2, influenced by the brachium of travel switch bigger for the accuracy of button, and the long power that is applied on the keytop that easily makes of brachium departs from central point, causes by phenomenon not in place, can't realize normal operation; 3, each button is pressed Shi Douyou and is produced the mechanical type keypad sounds.Therefore touch control flow occurred, but, entered practical technical scheme seldom because touch control flow belongs to update technology, with high content of technology.Disclosed by retrieval Chinese patent literature as seen, related touch screen design and operational version are seldom mentioned application in household appliances and related touch-screen mostly is resistor-type, as No. 00809010.6 " high-reliability touch panel " disclosed technical scheme of Chinese patent application, Chinese patent application 00126091.X number " display unit of touch screen and this touch screen of use " then provided the basic structure of touch-screen.

The utility model content

The problem of the required solution of the utility model is for overcoming the deficiency of existing air-conditioner by key technology, a kind of capacitive touch screen domestic air conditioner being provided, to realize the isolated operation of air-conditioner key switch and human body.

Designed a kind of domestic air conditioner touch-screen for addressing the above problem, comprise and be arranged on the installing rack on the cabinet-type air conditioner panel in the air conditioner chamber, the air-conditioner touch-screen is fixed on the installing rack and is embedded on the window of cabinet-type air conditioner control panel, also be inlaid with armorplate glass on the window of cabinet-type air conditioner control panel, capacitive touch screen is positioned at after the armorplate glass and is close to thereon.This capacitive touch screen is four layers of compound glass screen, in its surface applied one deck silicon soil glassivation is arranged, and is coated with the layer of transparent conducting film on its inner surface and each interlayer, as the ITO nesa coating of routine.

Described capacitive touch screen and control circuit link, and the chip in the control circuit is exported the action that high level is controlled peripheral components according to calculate touch point position from the signal power of touch-screen after.

The utility model touch-screen is installed in the toughened glass panel back side of cabinet-type air conditioner control panel in the air conditioner chamber, and the button on the touch-screen and the finger of operation are kept apart, and utilizes the induction by current principle of human body to carry out work.When finger touch is on the safety glass layer, because people's bulk electric field, user and touch screen surface form a coupling capacitance, for high frequency electric, electric capacity is direct conductor, so finger is relevant with the position of finger presses from the size that contact point siphons away a very little electric current and this electric current.Thereby the utility model is reasonable in design, and is simple in structure, easy to implement, easy to operate, and external form is novel graceful, the added value of product height; The front panel of indoor cabinet-type air conditioner is smooth smooth, and without any protrusion, associative perception is strong and succinct smooth.

Description of drawings

Accompanying drawing 1 is that the utility model is installed in its assembled form schematic diagram on the cabinet-type air conditioner panel in the air conditioner chamber; Accompanying drawing 2 is touch screen structure schematic diagrames; Accompanying drawing 3 is control circuit principle schematic.

The specific embodiment

The technical solution adopted in the utility model is: touch-screen is installed on the control window of air conditioner indoor unit panel, surface at the control window is inlaid with toughened glass panel, touch-screen is fixed on the behind that is promptly held up and be close to toughened glass panel in the installing rack by installing rack, the button on the touch-screen and the finger of operation are kept apart, utilize the induction by current principle of human body to carry out work.

Capacitive touch screen is four layers of compound glass screen; the inner surface of glass screen and interlayer respectively scribble one deck ITO nesa coating; outermost layer is a skim silicon soil glassivation; interlayer ITO coating is as working face; draw four electrodes on four angles, internal layer ITO as screen layer to guarantee good working environment.When finger touch was on the safety glass layer, because people's bulk electric field, user and touch screen surface formed with a coupling capacitance, and for high frequency electric, electric capacity is direct conductor, so finger siphons away a very little electric current from contact point.This electric current flows out the electrode from four jiaos of touch-screen respectively, and the electric current of these four electrodes of flowing through is directly proportional with the distance of pointing four jiaos, and control circuit draws touch point position by the accurate Calculation to these four current ratios.Then the push button signalling of being sampled is fed back to master chip, come periphery electrical devices work such as drive compression machine, blower fan, cross valve by output control signal after the routine processes, just can realize automatic, freeze, blow, heat, control function and startup and shutdown work thereof such as dehumidifier, temperature setting.

Fig. 1 has provided the structure chart of the indoor cabinet-type air conditioner of capacitive touch screen domestic air conditioner, as seen be inlaid with view picture safety glass 3 in the stage casing of air-conditioner cabinet shell 1, silk-screen has each function button point 2 on the surface of safety glass, is that the touch-screen of being close to thereafter 4 is a touching display screen behind at safety glass.By touching the button point 2 of institute's silk-screen on the toughened glass panel, just can produce the touching signal and pass to touch-screen behind.

Fig. 2 is in the hierarchy principle schematic of touch-screen and the course of work being user's finger presses or the current trend schematic diagram when touching on toughened glass panel, touching display screen 4 points 5 by depressing in user's operation among the figure, the variation of capacitance can local appear, so there is electric current to flow to touch point 6 from the electrode 7 on touch-screen four limits.The leading point of this electrode is generally at four jiaos, and is positioned at ratio and power that control circuit behind the touch-screen just can calculate electric current, calculates touch point position, draws the input signal of position, touch point.Control circuit electrical principle schematic diagram is seen Fig. 3, and wherein Input is the nearly key input signal of air-conditioner touch-screen up-sampling, IC ₈Be master chip, IC ₇Be display screen VFD display driver chip, and IC ₁₀, IC ₁₁, IC ₁₂Be three No. seven phase inverters.Each touch point be input to chip IC by key input signal respectively by interface Input ₈Pin P _2.3, P _2.2, P _2.1, P _2.0, P _3.1, P _3.0, through chip IC ₈After the routine processes, the output high level is through IC ₁₀, IC ₁₁And IC ₁₂Behind the phase inverter, make the relay coil adhesive, relay contact conducting, thereby the work of control periphery electrical devices realize the correlation function of air-conditioning, as automatically, freeze, blow, heat, dehumidifier, temperature setting etc. and startup and shutdown work thereof.Microcontroller and VFD drive circuit framework are adopted in this control circuit display part, and microcontroller is communicated by letter P by three-way with the VFD drive circuit _{6.3 (RX)}Be used for the data input and output, be connected with Dout, Din.P _{6.2 (TX)}Produce serial clock signal CLK.Universal I/O port P _6.1Be connected with the STB of microcontroller, produce data/command recognition signal.Open Lou output because of the Dout mouth for the N raceway groove, draw resistance R so need connect ₇₀₄, to form the data level signal.The built-in OSC of microcontroller, resistance R ₇₀₁Determine its frequency of oscillation, VFD display screen dynamic scan shows to be finished automatically by the built-in hardware circuit of drive circuit.

Claims

1, a kind of domestic air conditioner touch-screen, comprise and be arranged on the installing rack on the cabinet-type air conditioner panel in the air conditioner chamber, the air-conditioner touch-screen is fixed on the installing rack and is embedded on the window of cabinet-type air conditioner control panel, it is characterized in that also being inlaid with on the window of cabinet-type air conditioner control panel armorplate glass, capacitive touch screen is positioned at after the armorplate glass and is close to thereon.

2, domestic air conditioner touch-screen according to claim 1 is characterized in that described capacitive touch screen is four layers of compound glass screen.

3, domestic air conditioner touch-screen according to claim 2 is characterized in that in the surface applied of touch-screen one deck silicon soil glassivation being arranged, and is coated with the layer of transparent conducting film on surface and each interlayer within it.

4, according to claim 2 or 3 described domestic air conditioner touch-screens, it is characterized in that described capacitive touch screen and control circuit link, the chip in the control circuit is exported the action that high level is controlled peripheral components according to calculate touch point position from the signal power of touch-screen after.