CN207268557U - A kind of condenser type refrigerator coagulates white sensor detection circuit - Google Patents
A kind of condenser type refrigerator coagulates white sensor detection circuit Download PDFInfo
- Publication number
- CN207268557U CN207268557U CN201721137639.XU CN201721137639U CN207268557U CN 207268557 U CN207268557 U CN 207268557U CN 201721137639 U CN201721137639 U CN 201721137639U CN 207268557 U CN207268557 U CN 207268557U
- Authority
- CN
- China
- Prior art keywords
- circuits
- refrigerator
- cdc
- detection circuit
- sensor
- 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.)
- Active
Links
Landscapes
- Defrosting Systems (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses a kind of condenser type refrigerator to coagulate white sensor detection circuit, the detection circuit includes CDC chip detecting circuits and MCU process circuits, the CDC chip detecting circuits, refrigerator is integrated in coagulate in the aluminum hull of capacitance front end of white sensor, the MCU process circuits, in line end USB public affairs shells, and CDC chip detecting circuits are connected to MCU process circuits.The utility model can solve the problems, such as that above-mentioned conventional condenser is coagulated white sensor detection circuit and existed, both the cooperation detection of multiple sensors can be carried out at the same time in refrigerator, the influence that refrigerator environment factor detects single sensor capacitance can be reduced again, enhance the stability of sensor, anti-interference, and improve the sensitivity of sensor.
Description
Technical field
The utility model belongs to solidifying white detection technique field, the protective device and method of more particularly to easy frosting equipment.
Background technology
In the application field of domestic refrigerator, the evaporator for refrigeration is during work, the condenser pipe on evaporator
Frosting is easy to fin, the white attachment in evaporator surface is serious to have impact on refrigerating efficiency.
Refrigerator removes the frost of evaporator surface by being timed heating to evaporator.But the solidifying white speed and use of refrigerator
There is the use habit of refrigerator at family very big relation, such as the time of frequent switch gate, frequency, the quantity of food stored in refrigerator and
Food species etc..Therefore problem existing for timing defrost be not according to the thickness of frosting come ' intelligence ' defrost, but according to
Time assesses whether to need defrost, and this defrost mechanism increases the power consumption of refrigerator, wastes electric energy.Therefore evaporator in refrigerator
The Thickness sensitivity for coagulating frost is imperative.Under normal conditions, condenser type, which coagulates white sensor, is realized based on parallel plate capacitor principle,
Using the difference of air between parallel-plate positive and negative electrode piece and white dielectric constant, frost and solidifying frost whether are coagulated on evaporator to detect
Thickness.
In existing technology, traditional condenser type coagulates white sensor detection circuit, and one kind is by CDC (Capacitance
To Digital Converter) chip and MCU process circuits be integrated in sensor side, and it is made of one, exports evaporimeter frosting
Thickness information is transferred to the master control borad of refrigerator.One I/0 interface of master control borad that the shortcomings that circuit essentially consists in refrigerator can only connect
One condenser type coagulates white sensor, and when the I/O mouth resources of refrigerator master control are limited, and the evaporator of refrigerator need to connect multiple condenser types and coagulate
During white sensor synergism detection, which is just no longer applicable in.It is by CDC chips and MCU that another condenser type, which coagulates white detection circuit,
Process circuit is all placed in sensor line end, and front-end detection capacitance separates.The shortcomings that circuit, essentially consists in front end capacitance and CDC
Lead between chip can introduce very big parasitic capacitance, and cause sensor be easy to due to refrigerator work environment etc. because
Element, introduces very big parasitic capacitance, so as to influence accuracy and stability that sensor coagulates frost thickness detection.
The content of the invention
Based on this, therefore the primary mesh of the utility model be to provide a kind of condenser type refrigerator and coagulate white sensor detection electricity
Road, the circuit can solve the problems, such as that above-mentioned conventional condenser is coagulated white sensor detection circuit and existed, both can be same in refrigerator
The cooperation detection of the multiple sensors of Shi Jinhang, and the influence that refrigerator environment factor detects single sensor capacitance can be reduced,
The stability of sensor, anti-interference are enhanced, and improves the sensitivity of sensor.
It is that providing a kind of condenser type refrigerator coagulates white sensor detection circuit, the circuit another mesh of the utility model
Have the advantages of simple structure and easy realization, multiple condenser types can be connected and coagulate the cooperation detection that white sensor coagulate frost, reduce refrigerator master control
The occupancy of plate I/O interface resources, compensate for the deficiency of single sensor context of detection.
To achieve the above object, the technical solution of the utility model is：
A kind of condenser type refrigerator coagulates white sensor detection circuit, it is characterised in that the detection circuit includes CDC chips
Detection circuit and MCU process circuits, the CDC chip detecting circuits, are integrated in the aluminium that refrigerator coagulates the capacitance front end of white sensor
In shell, the MCU process circuits, in line end USB public affairs shells, and CDC chip detecting circuits are connected to MCU process circuits.
Further, the MCU process circuits include MCU main control chips, NTC thermometric front-end filtering circuitries, UART interface and
I2C interface.
Further, CDC chip detecting circuits include CDC detection circuits and Wheatstone bridge, and Wheatstone bridge is used to survey
Temperature, Wheatstone bridge are connected between the GND and VDD of CDC detection circuits.
Further, CDC detection circuits are communicated by I2C agreements and MCU circuits, and the capacitance detected is transferred to
MCU processing, the I/O resources that the I2C order wires or MCU of MCU enrich can be with the multiple solidifying white sensors of carry, easy to evaporate
The cooperation detection of multiple sensors on device.
The refrigerator that the utility model is realized coagulates white detection circuit, can connect multiple condenser types and coagulates white sensor and be coagulated
The cooperation detection of frost, reduces the occupancy of refrigerator master control borad I/O interface resources, compensate for the deficiency of single sensor context of detection.
The influence that refrigerator work environment coagulates condenser type white sensor parasitic capacitance can be reduced again at the same time, enhance the stabilization of sensor
Property, anti-interference, and the sensitivity of sensor is improved, more accurate capacitance is obtained, so as to export accurate refrigerator
The information of solidifying frost thickness.
Brief description of the drawings
Fig. 1 is that the utility model implements refrigerator and coagulates white CDC chips and MCU circuit framework figure.
Fig. 2 is that the utility model implements the structure diagram that refrigerator coagulates white CDC chips and MCU circuits.
Embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated the utility model.It should be appreciated that specific embodiment described herein is only explaining
The utility model, is not used to limit the utility model.
Shown in Fig. 1, white sensor detection circuit, shown in figure, 001 are coagulated by the condenser type refrigerator that the utility model is realized
For the condenser pipe on evaporator, for the refrigerant that circulates, when refrigerator work, condensation pipe surface can condense one layer of frost.With solidifying
The increase of frost thickness, the thickness of frost is coagulated between capacitance electrode piece 002 also can accordingly increase, and the capacitance of capacity plate antenna also can be therewith
It is bigger.Thus white thickness can be coagulated on evaporator to monitor by the size of the capacitance exported.Therefore, the utility model is realized
The detection circuit includes CDC chip detecting circuits and MCU process circuits (abbreviation MCU circuits), the CDC chips detection electricity
Road, is integrated in refrigerator and coagulates in the aluminum hull of capacitance front end of white sensor, the MCU process circuits, in line end USB public affairs shells,
And CDC chip detecting circuits are connected to MCU process circuits.
Wherein, CDC chip detecting circuits include CDC detection circuits and Wheatstone bridge, and Wheatstone bridge is used for thermometric,
Wheatstone bridge is connected between the GND and VDD of CDC detection circuits.
Refer to the attached drawing 2, in the utility model, the Wheatstone bridge of CDC detection circuits (abbreviation CDC) and thermometric is placed on aluminum hull
In 003, and sealed, prevent that water inlet influences circuit during defrost.CDC is integrated in front end capacitance, can significantly be subtracted
Influence of the mini-bar complex environment to sensor parasitic capacitance, stablizes real capacitance so as to export.CDC passes through I2C agreements
Communicate with MCU circuits, the capacitance detected is transferred to MCU processing, the I2C order wires or MCU of MCU enrich
I/O resources can be with the multiple solidifying white sensors of carry, easy to the cooperation detection of multiple sensors on evaporator.Pass through 004 harness
Realize power supply of the MCU process circuits to CDC chips, receive the digital capacitance value of CDC outputs, detect the resistance value of NTC thermistor
Change.MCU process circuits are placed in USB public affairs shell 005.USB public affairs shell can play the role of waterproof and protection PCB.By MCU processing
Solidifying frost thickness signal afterwards is communicated by UART interface harness 006 and refrigerator master control PCB, informs that white sensing is coagulated in refrigerator master control
The capacitance of device, so as to monitor the solidifying white situation on evaporator of refrigerator, refrigerator master control can be sentenced according to the size of the capacitance of sensor
The disconnected thickness for coagulating frost, so as to carry out the intelligent control defrost time.
Therefore, the refrigerator that the utility model is realized coagulates white detection circuit, can connect multiple condenser types and coagulate white sensor
Coagulate the cooperation detection of frost, reduce the occupancy of refrigerator master control borad I/O interface resources, compensate for single sensor context of detection
Deficiency.The influence that refrigerator work environment coagulates condenser type white sensor parasitic capacitance can be reduced again at the same time, enhance sensor
Stability, anti-interference, and improve the sensitivity of sensor obtains more accurate capacitance, thus export it is accurate
Refrigerator coagulate the information of frost thickness.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (4)
1. a kind of condenser type refrigerator coagulates white sensor detection circuit, it is characterised in that the detection circuit includes the inspection of CDC chips
Slowdown monitoring circuit and MCU process circuits, the CDC chip detecting circuits, are integrated in the aluminum hull that refrigerator coagulates the capacitance front end of white sensor
Interior, the MCU process circuits, in line end USB public affairs shells, and CDC chip detecting circuits are connected to MCU process circuits.
2. condenser type refrigerator as claimed in claim 1 coagulates white sensor detection circuit, it is characterised in that the MCU process circuits
Including MCU main control chips, NTC thermometric front-end filtering circuitries, UART interface and I2C interface.
3. condenser type refrigerator as claimed in claim 2 coagulates white sensor detection circuit, it is characterised in that CDC chip detecting circuits
Include CDC detection circuits and Wheatstone bridge, Wheatstone bridge is connected between the GND and VDD of CDC detection circuits.
4. condenser type refrigerator as claimed in claim 3 coagulates white sensor detection circuit, it is characterised in that CDC detection circuits pass through
I2C agreements and MCU circuits communicate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721137639.XU CN207268557U (en) | 2017-09-06 | 2017-09-06 | A kind of condenser type refrigerator coagulates white sensor detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721137639.XU CN207268557U (en) | 2017-09-06 | 2017-09-06 | A kind of condenser type refrigerator coagulates white sensor detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207268557U true CN207268557U (en) | 2018-04-24 |
Family
ID=61960485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721137639.XU Active CN207268557U (en) | 2017-09-06 | 2017-09-06 | A kind of condenser type refrigerator coagulates white sensor detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207268557U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110608569A (en) * | 2019-09-05 | 2019-12-24 | 邹庆丰 | Refrigerator for detecting icing by using capacitive proximity switch |
-
2017
- 2017-09-06 CN CN201721137639.XU patent/CN207268557U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110608569A (en) * | 2019-09-05 | 2019-12-24 | 邹庆丰 | Refrigerator for detecting icing by using capacitive proximity switch |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107514860A (en) | A kind of condenser type refrigerator coagulates white sensor detection circuit | |
| CN207268557U (en) | A kind of condenser type refrigerator coagulates white sensor detection circuit | |
| CN107452989A (en) | Battery management system and there is its flight control system and aircraft | |
| CN207690249U (en) | A kind of electrical fire safety monitoring device | |
| CN101413829A (en) | Temperature detecting device containing temperature detection circuit board | |
| CN107238609A (en) | Icing frosting detection device and method based on microwave | |
| CN107367529A (en) | Coagulate white sensor and with the evaporator for coagulating white detection function | |
| CN203489934U (en) | Wireless valve control remote water meter | |
| CN106154017A (en) | A kind of DC current sensor | |
| CN207556448U (en) | A kind of capacitance coagulates the shielding construction of frost detection | |
| CN203795195U (en) | Intelligent domestic clothes airing rod | |
| CN207625848U (en) | Intelligent lighting system | |
| CN106209152B (en) | Intelligent well cover device | |
| CN206673955U (en) | Intelligent well cover device | |
| CN205300491U (en) | Ice sheet thickness sensor and refrigeration equipment | |
| CN205228587U (en) | Electrodeless water level detection circuit of liquid tank | |
| CN203203765U (en) | Water leakage alarm device for underwater autonomous unmanned vehicle | |
| CN207611009U (en) | Coagulate frost sensor and the evaporator with solidifying white detection function | |
| CN210672097U (en) | Close-fitting underwear based on RFID temperature measurement | |
| CN204854807U (en) | Display module is gathered to humiture | |
| CN206388316U (en) | The Internet of Things netlist tool communicated based on 4G | |
| CN204460926U (en) | Instant freezer ice layer thickness sensor and instant freezer | |
| CN205666221U (en) | Fuse monitoring system based on position sensor | |
| CN105595738B (en) | Cup used for blind people | |
| CN205015675U (en) | High -power rectification cabinet water -cooled generating line real -time monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |