CN2909123Y - Controller for refrigerator - Google Patents
Controller for refrigerator Download PDFInfo
- Publication number
- CN2909123Y CN2909123Y CN 200620058387 CN200620058387U CN2909123Y CN 2909123 Y CN2909123 Y CN 2909123Y CN 200620058387 CN200620058387 CN 200620058387 CN 200620058387 U CN200620058387 U CN 200620058387U CN 2909123 Y CN2909123 Y CN 2909123Y
- Authority
- CN
- China
- Prior art keywords
- microprocessor
- circuit
- control device
- reach
- metal plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A control device used for freezer chest is disclosed by the utility model and is characterized in that the control device comprises a microprocessor (1), a capacitance induction type keyboard circuit (2), a temperature collection circuit (4), a power supply circuit (3) and a display circuit. The capacitance induction type keyboard circuit (2) is connected with a control input port of the microprocessor (1) and the temperature collection circuit (4) is connected with I/O port of the microprocessor (1); an output port of the microprocessor (1) is connected with an input end of the display circuit and a control input port of an equipment of lower level. The temperature collection circuit inputs collected temperature to the microprocessor (1) and outputs values to the display circuit after being processed by the microprocessor (1) and output control signal to the equipment of lower level. Comparing with prior art, the utility model eliminates the problem of vulnerability of a mechanical press button control device to abrasion and corrosion and also improves life of the device.
Description
Technical field
The utility model relates to a kind of control device that is used for reach in freezer, belong to the technical field of reach in freezer control device.
Background technology
At present, the control device of reach in freezer generally is the control device of mechanical key formula, promptly by mechanical key to the control device input control signal.The mechanical key of these contacts must be exposed to outside the cabinet, therefore in long-term use, usually run into dust in air and enter in the control device, make the problem of control device cisco unity malfunction, thereby reduced the life-span of control device by the slit between mechanical key and control panel.And the wearing and tearing that in high-frequency action, are easy to generate of mechanical key, the problem of corrosion.
The utility model content
The utility model technical issues that need to address, i.e. the purpose of this utility model is in order to be provided for the control device of reach in freezer, this control device solved in the problem of using wearing and tearing, corrosion, the service life that can improve control device.
The purpose of this utility model can reach by taking following measure:
A kind of control device that is used for reach in freezer, its design feature is: comprise microprocessor, capacitor induction type keyboard circuit, temperature collection circuit, power supply circuits and display circuit; The capacitor induction type keyboard circuit is connected with the control input end of microprocessor, and temperature collection circuit is connected with the I/O port of microprocessor, and the output of microprocessor connects input that shows and the control input end that connects next stage equipment.Temperature collection circuit through after the microprocessor processes, shows numerical value to display circuit output with the temperature input microprocessor that collects, and to next stage equipment output control signal.
The utility model technical solution problem, can also take following measure:
Described microprocessor is that chip and the peripheral accessory thereof of B7144 is formed by connecting by model, the capacitor induction type keyboard circuit mainly is made up of three electronic switches, each electronic switch is in series by two diodes, electrode induction metal plate and capacitor, wherein the cathode terminal of two diodes is connected with induction metal plate, each resistance in parallel of the other end of two diodes, the anode tap of a diode is connected with the control input end of microprocessor.
The output of the described microprocessor resistance of connecting, this resistance other end connects the base stage of triode, and the colelctor electrode of this triode connects a light emitting diode.
The upper surface of described electrode induction metal plate is provided with a non-metal board, and this non-metal board can be one deck glass.
The utlity model has following outstanding effect:
The utility model is a kind of control device with capacitor induction type switch, its control input end is connected with the capacitor induction type keyboard circuit, during work, as long as people will point the electrode induction metal plate near the capacitor induction type keyboard circuit, the electric field of this electrode will take place, and the electrode induction metal plate that needn't touch this circuit just can be controlled this control device and carry out work.Compared with prior art, just can avoid the easy wearing and tearing that produce of mechanical type key control device, the problem of corrosion.Also can improve the life-span of control device.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is the circuit theory diagrams of an embodiment of the utility model.
The specific embodiment
Below in conjunction with specific embodiment the utility model is specifically described.
Fig. 1, Fig. 2 constitute a specific embodiment of the present utility model.Present embodiment comprises microprocessor 1, capacitor induction type keyboard circuit 2, temperature collection circuit 4, power supply circuits 3, display circuit.Described microprocessor is that the chip of B7144 and the electronic component of periphery thereof are formed by connecting by model.Described capacitor induction type keyboard circuit 2 is made up of three electronic switches.The instruction meaning that each electronic switch is represented respectively to be increased temperature, reduce temperature, switch.Each electronic switch is connected together in series by first diode, electrode induction metal plate, second diode, capacitor, the cathode terminal of wherein said first diode, second diode is connected with induction metal plate, each resistance in parallel of the two ends of first diode, second diode, the anode tap of first diode is connected with the control input end of microprocessor.Diode plays a rectification at this moment, makes the electrode metal sheet have a stable voltage.
In the present embodiment: have wave detector, low pass filter and sinusoidal wave maker in the integrated circuit B7144.During work, the sinusoidal wave maker of integrated circuit and outer meeting resistance produce pure sine wave, when the electric field at electrode induction metal plate place changes, when being staff near induction metal plate, the electrode metal sheet voltage change, sine wave also changes simultaneously, and the detector of integrated circuit just can detect the variation of ripple, promptly is equivalent to receive control instruction.
Temperature collection circuit 4 is conventional temperature collection circuit, and as detector unit, this circuit is that the I/O port of little processing carries out conventional connection to this circuit with thermistor.
Display circuit is made of display driver chip 5 and display screen 6.The model that drives chip 5 is 74LS164.Drive chip 5 and carry out conventional being connected with display screen 6,1 of microprocessor.
The output of the described microprocessor resistance of connecting, this resistance other end connects the base stage of triode 8, and the colelctor electrode of this triode 8 connects a light emitting diode.The working condition of described diode displaying control device.
Temperature collection circuit after microprocessor control, handling, shows numerical value to display unit output with the temperature input microprocessor that collects.When people's finger instructed by the electrode metal sheet, display unit can show the situation of input, and the microprocessor processes instruction is given birth to the back and passed through output interface 7 to next stage equipment output control signal.
In addition, people also can put a non-metal board that thickness is moderate on the electrode induction metal plate, as glass, be beneficial to assurance like this when pointing near the electrode induction metal plate, can not touch the electrode induction metal plate, in the optimum distance of electrode induction metal plate and finger, the electric field of electrode induction metal plate changes.
Claims (4)
1, a kind of control device that is used for reach in freezer is characterized in that: comprise microprocessor (1), capacitor induction type keyboard circuit (2), temperature collection circuit (4), power supply circuits (3) and display circuit; Capacitor induction type keyboard circuit (2) is connected with the control input end of microprocessor (1), temperature collection circuit (4) is connected with the I/O port of microprocessor (1), and the output of microprocessor (1) connects input that shows and the control input end that connects next stage equipment.
2, a kind of control device that is used for reach in freezer according to claim 1, it is characterized in that: described microprocessor (1) is that chip and the peripheral accessory thereof of B7144 is formed by connecting by model, capacitor induction type keyboard circuit (2) mainly is made up of three electronic switches, each electronic switch is in series by two diodes, electrode induction metal plate and capacitor, wherein the cathode terminal of two diodes is connected with induction metal plate, each resistance in parallel of the other end of two diodes, the anode tap of a diode is connected with the control input end of microprocessor (1).
3, a kind of control device that is used for reach in freezer according to claim 2 is characterized in that: the output of described microprocessor (1) is by the base stage of resistance connection triode, and the colelctor electrode of this triode connects a light emitting diode.
4, according to claim 2 or 3 described a kind of control device that are used for reach in freezer, it is characterized in that: the upper surface of described electrode induction metal plate is provided with a non-metal board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620058387 CN2909123Y (en) | 2006-04-28 | 2006-04-28 | Controller for refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620058387 CN2909123Y (en) | 2006-04-28 | 2006-04-28 | Controller for refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2909123Y true CN2909123Y (en) | 2007-06-06 |
Family
ID=38128337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620058387 Expired - Fee Related CN2909123Y (en) | 2006-04-28 | 2006-04-28 | Controller for refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2909123Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107388706A (en) * | 2013-06-25 | 2017-11-24 | 东芝生活电器株式会社 | Refrigerator |
| CN107514860A (en) * | 2017-09-06 | 2017-12-26 | 芯海科技（深圳）股份有限公司 | A kind of condenser type refrigerator coagulates white sensor detection circuit |
| CN110631324A (en) * | 2019-10-14 | 2019-12-31 | 南京创维电器研究院有限公司 | Control and interaction method of embedded refrigeration equipment |
-
2006
- 2006-04-28 CN CN 200620058387 patent/CN2909123Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107388706A (en) * | 2013-06-25 | 2017-11-24 | 东芝生活电器株式会社 | Refrigerator |
| CN107388706B (en) * | 2013-06-25 | 2022-06-14 | 东芝生活电器株式会社 | Refrigerator with a door |
| CN107514860A (en) * | 2017-09-06 | 2017-12-26 | 芯海科技（深圳）股份有限公司 | A kind of condenser type refrigerator coagulates white sensor detection circuit |
| CN110631324A (en) * | 2019-10-14 | 2019-12-31 | 南京创维电器研究院有限公司 | Control and interaction method of embedded refrigeration equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070606 |