CN2208715Y - Computer fuzzy controller for refrigerator - Google Patents
Computer fuzzy controller for refrigerator Download PDFInfo
- Publication number
- CN2208715Y CN2208715Y CN 94218036 CN94218036U CN2208715Y CN 2208715 Y CN2208715 Y CN 2208715Y CN 94218036 CN94218036 CN 94218036 CN 94218036 U CN94218036 U CN 94218036U CN 2208715 Y CN2208715 Y CN 2208715Y
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- CN
- China
- Prior art keywords
- circuit
- temperature
- temperature measurement
- measurement circuit
- refrigerator
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- 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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- Devices That Are Associated With Refrigeration Equipment (AREA)
- Control Of Temperature (AREA)
Abstract
The utility model relates to a computer controller for a refrigerator, and the utility model is mainly composed of a single chip computer, a power circuit, the temperature measurement circuit of a refrigerating room, the temperature measurement circuit of a cold storage room, etc. The interior of the utility model is also provided with a temperature measurement circuit used for measuring environment temperature, and the optimal control point of a refrigerator is determined according to the information of the environment temperature. The voltage measurement circuit and the zero-crossing measurement circuit of a power source can realize dynamic control to the zero-crossing action of the relay contact of a compressor, in order to realize that any relay contact is accurately controlled to act on the zero-crossing point of alternating current.
Description
The utility model is computer controllers such as a kind of refrigerator temperature.
The refrigerator temperature controller can be divided into mechanical temperature-control, electronic temperature control and computer temperature control three classes.The mechanical temperature-control cost is low, technical maturity but temperature-controlled precision is low, and function is simple, lacks various defencive functions.The electronic temperature control utensil has characteristics such as temperature is adjustable continuously, control accuracy is good, but its operation circuit complexity, poor anti jamming capability easily produces misoperation when practical.Computer Thermostat not only has all advantages of electronic temperature control device, and operation circuit is simple, after doing some corresponding improvement on the hardware and software, can improve the antijamming capability of temperature controller greatly, makes the practicality of temperature controller become possibility.But existing Computer Thermostat is according to the user freezing and the temperature value reefer setting to be controlled.When needs change freezing, temperature of refrigerating chamber, just need reset, this makes troubles to the user.In addition, along with the change of environment temperature etc., refrigerator actual temperature and displays temperature generation difference, the temperature that the user is provided with differs and makes refrigerator be operated in optimum condition surely, and this just may cause the waste of energy.
It is strong that the purpose of this utility model provides a kind of antijamming capability; and can make refrigerator work two kinds of refrigerator computer controllers under the working method are set in fuzzy control and temperature, and have outage memory, relay zero-crossing inhale put, functions such as compressor overvoltage/undervoltage and delay protection.Compare with existing refrigerator computer controller, it has following characteristics:
1, has fuzzy control and temperature two kinds of working methods are set.
When fuzzy control method, computer controller can be according to the switching of environment temperature, refrigerator doors, round the clock, parameters such as food storage amount, the control refrigerator had both helped the preservation of food to certain temperature range, and was fresh-keeping, also help the work period and the efficient of freezer compressor, thereby reach the purpose of economize on electricity.
2, has the outage memory function.
After the outage, the temperature that the user is provided with, the time, the duty sign of parameter such as working method and controller etc. can both keep.In case incoming call, controller can be resumed work at once.
3, utilize the method for dynamic calibration, make the switching of contact breaker points be strict controlled in zero-crossing of alternating current.Therefore, contact switching spark is little, has prolonged the serviceable life of relay.
4, compressor had overvoltage/undervoltage and delay protection function.
The utility model is made up of CMOS single-chip microcomputer refrigerating chamber temperature measurement circuit, reefer temperature measurement circuit, power circuit, display circuit etc., it is characterized in that: in controller, also be provided with the environment temperature measurement circuit, this circuit and refrigerating chamber temperature measurement circuit, the reefer temperature measurement circuit inputs in the analog to digital converter of single-chip microcomputer together, and described three temperature measurement circuits also can be by being connected to the input port of single-chip microcomputer after the A/D conversion.The utility model is provided with three groups of temperature sensors, and wherein two groups are used for detecting refrigerating chamber and temperature of refrigerating chamber, and another group is used for the testing environment temperature.Ambient temperature information is the utility model most important information that decides fuzzy control.Under a certain environment temperature, the energy consumption of compressor of different operating point and work period differ bigger, and best operating point changes with environment temperature.In addition, the refrigerator temperature that records of temperature sensor also is different under different environment temperatures with the difference of actual spin manifold temperature.Therefore, utilize environment temperature to decide control that three benefits are arranged: 1) can obtain optimum controlling point.2) can revise measured temperature in time, make the more realistic spin manifold temperature of shown temperature.3) can judge winter environment exactly.Big variation can not take place in the temperature of reefer in the winter time, can transfer refrigerating chamber is realized control, and this is called low temp compensating.(low temp compensating need add a heating wire and heats in reefer traditionally, forces temperature of refrigerating chamber to change, and does the waste energy like this.）
In control circuit, be provided with power zero-crossing detection circuit, by the low-voltage alternating-current current potential IC of transformer secondary (b) output
2, R
4After becoming pulse square wave after the shaping, import in the single-chip microcomputer.Utilize zero cross detection circuit and voltage detecting circuit can realize the over-zero action of compressor relay contact is dynamically controlled.After the zero passage testing circuit detects the AC power zero crossing, through trigger relay behind the suitable initial time delay, the action that utilizes voltage detecting circuit to record relay contact more just can obtain the reasonable delay time of this relay in (being the action moment of compressor) process calculating back constantly, makes relay contact realize moving zero point.The control method of this employing dynamic calibration can overcome the relay of different model or the time inconsistency is put in the suction that caused because of production technology difference, realizes that the contact of accurately controlling any relay moves at zero-crossing of alternating current.
Be provided with in the control circuit by voltage detecting circuit, this circuit is imported single-chip microcomputer by transformer secondary (a) behind bridge rectifier, capacitor filtering, electric resistance partial pressure.Utilize the low-power consumption of CMOS single-chip microcomputer, when realizing outage to the parameter that is provided with in the single-chip microcomputer and the protection of duty.When the voltage that records when voltage detecting circuit was lower than a certain value, single-chip microcomputer turned to by standby power supply and powers.At this moment, some peripheral circuit power supplys that power consumption is bigger in the controller are cut.
Be described in detail below in conjunction with accompanying drawing.
Fig. 1 is embodiment of the present utility model.
Fig. 2 is temperature measurement circuit figure.
Referring to Fig. 1, Fig. 2, three groups of temperature measurement circuits of the present utility model (Fig. 1 gets the bid 2) as sensitive element, are input to the A/D mouth of single-chip microcomputer by semiconductor temperature sensor 3 after the signal that records amplifies, become temperature data again after the program conversion.
Zero cross detection circuit, by the low-voltage alternating-current of transformer secondary b, by becoming pulse square wave after the shaping, the edge of square wave is the AC power zero crossing.
Voltage detecting circuit is by bridge rectifier circuit (D
1-D
4) and resistance R
1, R
2Bleeder circuit is formed.
Output circuit by the single-chip microcomputer delivery outlet through triode T
1Drive back output.
Receive key circuit by K
1, K
2, K
3Three keys are formed, and the user can utilize these three keys that working method, freezing, temperature of refrigerating chamber etc. are set.
Display circuit is made up of two charactrons and four light emitting diodes.Charactron is used for showing freezer temperature, temperature of refrigerating chamber, environment temperature, operating voltage etc.LED in the light emitting diode
1The expression fuzzy control method, LED
2The fuzzy Energy Saving Control mode of expression, LED
3The expression compressor moves LED
4Expression is just in defrost.
Claims (4)
1, a kind of refrigerator computer fuzzy controller, form by CMOS single-chip microcomputer, refrigerating chamber temperature measurement circuit, reefer temperature measurement circuit, power circuit, display circuit etc., it is characterized in that: also be provided with the environment temperature measurement circuit in controller, this circuit inputs in the analog to digital converter of single-chip microcomputer with refrigerating chamber temperature measurement circuit, reefer temperature measurement circuit.
2, refrigerator computer fuzzy controller as claimed in claim 1 is characterized in that described three temperature measurement circuits also can be by being connected to the input port of single-chip microcomputer after the A/D conversion.
3, refrigerator computer fuzzy controller as claimed in claim 1 is characterized in that: be provided with power zero-crossing detection circuit in the control circuit, by the low-voltage AC of transformer secondary (b) output through IC
2, R
4After becoming pulse square wave after the shaping, import in the single-chip microcomputer.
4, refrigerator computer fuzzy controller as claimed in claim 1 is characterized in that: be provided with voltage detecting circuit in the control circuit, this circuit is imported single-chip microcomputer by transformer secondary (a) behind bridge rectifier, capacitor filtering, electric resistance partial pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94218036 CN2208715Y (en) | 1994-08-03 | 1994-08-03 | Computer fuzzy controller for refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94218036 CN2208715Y (en) | 1994-08-03 | 1994-08-03 | Computer fuzzy controller for refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2208715Y true CN2208715Y (en) | 1995-09-27 |
Family
ID=33833322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94218036 Expired - Fee Related CN2208715Y (en) | 1994-08-03 | 1994-08-03 | Computer fuzzy controller for refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2208715Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408775B (en) * | 2007-10-12 | 2012-07-25 | 苏州三星电子有限公司 | Refrigerator temperature control method |
| CN106771529A (en) * | 2016-11-25 | 2017-05-31 | 安徽美芝制冷设备有限公司 | Refrigerator and the zero cross detection circuit for refrigerator |
| CN112413952A (en) * | 2020-10-19 | 2021-02-26 | 珠海格力节能环保制冷技术研究中心有限公司 | System, method, controller and medium for controlling refrigeration defrosting temperature of variable frequency refrigerator |
-
1994
- 1994-08-03 CN CN 94218036 patent/CN2208715Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408775B (en) * | 2007-10-12 | 2012-07-25 | 苏州三星电子有限公司 | Refrigerator temperature control method |
| CN106771529A (en) * | 2016-11-25 | 2017-05-31 | 安徽美芝制冷设备有限公司 | Refrigerator and the zero cross detection circuit for refrigerator |
| CN112413952A (en) * | 2020-10-19 | 2021-02-26 | 珠海格力节能环保制冷技术研究中心有限公司 | System, method, controller and medium for controlling refrigeration defrosting temperature of variable frequency refrigerator |
| CN112413952B (en) * | 2020-10-19 | 2022-07-05 | 珠海格力节能环保制冷技术研究中心有限公司 | System, method, controller and medium for controlling refrigeration defrosting temperature of variable frequency refrigerator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |