CN204460900U - A kind of refrigerator fan motor circuit - Google Patents
A kind of refrigerator fan motor circuit Download PDFInfo
- Publication number
- CN204460900U CN204460900U CN201520131536.7U CN201520131536U CN204460900U CN 204460900 U CN204460900 U CN 204460900U CN 201520131536 U CN201520131536 U CN 201520131536U CN 204460900 U CN204460900 U CN 204460900U
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- resistance
- relay
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- potentiometer
- electric capacity
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- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Defrosting Systems (AREA)
Abstract
The utility model provides a kind of refrigerator fan motor circuit, effectively solves the problem causing refrigeration for refrigerator exception when refrigerator fan motor cannot detect fan exception stall.Its scheme is, comprise fan electromotor, current detection circuit and defrosting warning circuit, the current output terminal of described fan electromotor is connected with current detection circuit, and described current detection circuit is connected with defrosting warning circuit.The utility model structure is simple, and when refrigerator fan motor stall, the electric current in fan electromotor increases, when current detection circuit detects that electric current becomes large suddenly, the output of operational amplifier U1 exports positive voltage, the opening and closing contact energising of relay R L1, now triode Q1 conducting, the coil electricity of relay R L1, and then the normally opened contact of relay R L1 closes, buzzer BUZ1 is energized, and sends acoustic alarm, reminding user refrigerator has frozen white, should the process of carrying out ice.
Description
Technical field
The utility model relates to household appliance control technology field, especially a kind of refrigerator fan motor circuit.
Background technology
Because steam meets the frost of cold junction one-tenth in household electrical appliance refrigerator, and refrigerator has following harm after freezing: one, be unfavorable for food fresh-keeping, breed bacteria; Two, refrigerator inside has temperature-sensitive system, when refrigerator inside is frozen, temperature-sensitive system data can be made inaccurate; Three, cause refrigeration for refrigerator blunt, affect refrigerators last; Four, electricity is taken, power consumption.
Refrigerator freezes normally sometimes, sometimes freeze abnormal, even to lower the temperature difficulty, compressor long time running does not stop, if refrigerator is stopped using a period of time, used time is normal again again, this is because there is problem in defrost circuit, evaporimeter can not normally be defrosted, when evaporator surface frost layer is more long-pending thicker, block circulating cold air flowing, reduce the heat absorption capacity of evaporimeter, thus cause the long-play of Temperature drop in refrigerator difficulty and compressor, refrigerator fan motor regulates the temperature of refrigerator inside larger space, and fan electromotor cannot detect the abnormal stall of fan sometimes, thus cause refrigeration for refrigerator abnormal, Consumer's Experience less than.
Summary of the invention
For above-mentioned situation, for overcoming the defect of prior art, the object of the utility model is just to provide a kind of refrigerator fan motor circuit, effectively solves the problem causing refrigeration for refrigerator exception when refrigerator fan motor cannot detect fan exception stall.
Its technical scheme solved is, comprise fan electromotor, current detection circuit and defrosting warning circuit, the current output terminal of described fan electromotor is connected with current detection circuit, described current detection circuit is connected with defrosting warning circuit, described current detection circuit and defrosting warning circuit, comprise resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, potentiometer RV1, potentiometer RV2, electric capacity C1, electric capacity C2, electric capacity C3, triode Q1, operational amplifier U1, buzzer BUZ1 and relay R L1, one end of described resistance R2 connects the current output terminal of fan electromotor, the in-phase input end of the other end concatenation operation amplifier U1 of resistance R2, one end of the inverting input contact resistance R1 of operational amplifier U1, the other end ground connection GND of resistance R1, one end of the inverting input of operational amplifier U1 also contact resistance R3, the other end of resistance R3 connects the maximum end of potentiometer RV1, the maximum end of potentiometer RV1 connects the slider of potentiometer RV1, the output of the minimum of a value end concatenation operation amplifier U1 of potentiometer RV1, the 4 pin ground connection GND of operational amplifier U1, 8 pins of operational amplifier U1 meet power supply VCC, one end of the output contact resistance R4 of operational amplifier U1, the other end of resistance R4 connects one end of electric capacity C1, the other end of electric capacity C1 connects one end of buzzer BUZ1, the other end ground connection GND of buzzer BUZ1, the colelctor electrode of the output connecting triode Q1 of operational amplifier U1, the emitter stage of triode Q1 connects one end of the coil of relay R L1, the other end ground connection GND of the coil of relay R L1, the base stage of the movable contact connecting triode Q1 of relay R L1, the stationary contact of relay R L1 connects one end of electric capacity C3, the other end ground connection GND of electric capacity C3, one end of the stationary contact contact resistance R6 of relay R L1, the other end of resistance R6 connects the minimum of a value end of potentiometer RV2, the slider of potentiometer RV2 connects the maximum end of potentiometer RV2, the normally opened contact of relay R L1 connects one end of electric capacity C2, the other end ground connection GND of electric capacity C2, one end of the normally opened contact contact resistance R5 of relay R L1, the output of the other end concatenation operation amplifier U1 of resistance R5.
The utility model structure is simple, and when refrigerator fan motor stall, the electric current in fan electromotor increases, when current detection circuit detects that electric current becomes large suddenly, the output of operational amplifier U1 exports positive voltage, the opening and closing contact energising of relay R L1, now triode Q1 conducting, the coil electricity of relay R L1, and then the normally opened contact of relay R L1 closes, buzzer BUZ1 is energized, and sends acoustic alarm, reminding user refrigerator has frozen white, should the process of carrying out ice.
Accompanying drawing explanation
Fig. 1 is circuit connection diagram of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail.
Provided by Fig. 1, the utility model, comprise fan electromotor, current detection circuit and defrosting warning circuit, the current output terminal of described fan electromotor is connected with current detection circuit, described current detection circuit is connected with defrosting warning circuit, described current detection circuit and defrosting warning circuit, comprise resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, potentiometer RV1, potentiometer RV2, electric capacity C1, electric capacity C2, electric capacity C3, triode Q1, operational amplifier U1, buzzer BUZ1 and relay R L1, one end of described resistance R2 connects the current output terminal of fan electromotor, the in-phase input end of the other end concatenation operation amplifier U1 of resistance R2, one end of the inverting input contact resistance R1 of operational amplifier U1, the other end ground connection GND of resistance R1, one end of the inverting input of operational amplifier U1 also contact resistance R3, the other end of resistance R3 connects the maximum end of potentiometer RV1, the maximum end of potentiometer RV1 connects the slider of potentiometer RV1, the output of the minimum of a value end concatenation operation amplifier U1 of potentiometer RV1, the 4 pin ground connection GND of operational amplifier U1, 8 pins of operational amplifier U1 meet power supply VCC, one end of the output contact resistance R4 of operational amplifier U1, the other end of resistance R4 connects one end of electric capacity C1, the other end of electric capacity C1 connects one end of buzzer BUZ1, the other end ground connection GND of buzzer BUZ1, the colelctor electrode of the output connecting triode Q1 of operational amplifier U1, the emitter stage of triode Q1 connects one end of the coil of relay R L1, the other end ground connection GND of the coil of relay R L1, the base stage of the movable contact connecting triode Q1 of relay R L1, the stationary contact of relay R L1 connects one end of electric capacity C3, the other end ground connection GND of electric capacity C3, one end of the stationary contact contact resistance R6 of relay R L1, the other end of resistance R6 connects the minimum of a value end of potentiometer RV2, the slider of potentiometer RV2 connects the maximum end of potentiometer RV2, the normally opened contact of relay R L1 connects one end of electric capacity C2, the other end ground connection GND of electric capacity C2, one end of the normally opened contact contact resistance R5 of relay R L1, the output of the other end concatenation operation amplifier U1 of resistance R5.
Described triode Q1 is NPN type triode.
The utility model in use, current detection circuit detects the current output terminal of refrigerator fan motor, when refrigerator fan motor stall or refrigerator frosting very thick time, fan of refrigerator regulates interior refrigerator space temperature difficulty, the electric current output current of fan electromotor increases suddenly, the output of operational amplifier U1 is made to export positive voltage, the now normally-closed contact energising of relay R L1, now, triode Q1 forward bias and conducting, after triode Q1 conducting, the coil electricity of relay R L1, now, the normally opened contact of relay R L1 closes, buzzer BUZ1 obtains electric and sends chimes of doom, reminding user, refrigerator has frozen white, should carrying out frost process in time, extend the service life of refrigerator.
The utility model structure is simple, and when refrigerator fan motor stall, the electric current in fan electromotor increases, when current detection circuit detects that electric current becomes large suddenly, the output of operational amplifier U1 exports positive voltage, the normally-closed contact energising of relay R L1, now triode Q1 conducting, the coil electricity of relay R L1, and then the normally opened contact of relay R L1 closes, buzzer BUZ1 is energized, and sends acoustic alarm, reminding user refrigerator has frozen white, should the process of carrying out ice.
Claims (2)
1. a refrigerator fan motor circuit, comprise fan electromotor, current detection circuit and defrosting warning circuit, the current output terminal of described fan electromotor is connected with current detection circuit, described current detection circuit is connected with defrosting warning circuit, it is characterized in that, described current detection circuit and defrosting warning circuit, comprise resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, potentiometer RV1, potentiometer RV2, electric capacity C1, electric capacity C2, electric capacity C3, triode Q1, operational amplifier U1, buzzer BUZ1 and relay R L1, one end of described resistance R2 connects the current output terminal of fan electromotor, the in-phase input end of the other end concatenation operation amplifier U1 of resistance R2, one end of the inverting input contact resistance R1 of operational amplifier U1, the other end ground connection GND of resistance R1, one end of the inverting input of operational amplifier U1 also contact resistance R3, the other end of resistance R3 connects the maximum end of potentiometer RV1, the maximum end of potentiometer RV1 connects the slider of potentiometer RV1, the output of the minimum of a value end concatenation operation amplifier U1 of potentiometer RV1, the 4 pin ground connection GND of operational amplifier U1, 8 pins of operational amplifier U1 meet power supply VCC, one end of the output contact resistance R4 of operational amplifier U1, the other end of resistance R4 connects one end of electric capacity C1, the other end of electric capacity C1 connects one end of buzzer BUZ1, the other end ground connection GND of buzzer BUZ1, the colelctor electrode of the output connecting triode Q1 of operational amplifier U1, the emitter stage of triode Q1 connects one end of the coil of relay R L1, the other end ground connection GND of the coil of relay R L1, the base stage of the movable contact connecting triode Q1 of relay R L1, the stationary contact of relay R L1 connects one end of electric capacity C3, the other end ground connection GND of electric capacity C3, one end of the stationary contact contact resistance R6 of relay R L1, the other end of resistance R6 connects the minimum of a value end of potentiometer RV2, the slider of potentiometer RV2 connects the maximum end of potentiometer RV2, the normally opened contact of relay R L1 connects one end of electric capacity C2, the other end ground connection GND of electric capacity C2, one end of the normally opened contact contact resistance R5 of relay R L1, the output of the other end concatenation operation amplifier U1 of resistance R5.
2. a kind of refrigerator fan motor circuit according to claim 1, is characterized in that, described triode Q1 is NPN type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520131536.7U CN204460900U (en) | 2015-03-09 | 2015-03-09 | A kind of refrigerator fan motor circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520131536.7U CN204460900U (en) | 2015-03-09 | 2015-03-09 | A kind of refrigerator fan motor circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204460900U true CN204460900U (en) | 2015-07-08 |
Family
ID=53667773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520131536.7U Expired - Fee Related CN204460900U (en) | 2015-03-09 | 2015-03-09 | A kind of refrigerator fan motor circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204460900U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571245B (en) * | 2016-01-28 | 2017-12-08 | 珠海格力电器股份有限公司 | Air conditioner frosting judgment method and device and air conditioning system |
| CN110595137A (en) * | 2019-09-30 | 2019-12-20 | 合肥华凌股份有限公司 | Refrigeration equipment and method and device for identifying fan locked rotor |
| CN113091145A (en) * | 2021-03-24 | 2021-07-09 | 青岛海尔空调器有限总公司 | Protection method and device of water washing air device and air conditioner thereof |
-
2015
- 2015-03-09 CN CN201520131536.7U patent/CN204460900U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571245B (en) * | 2016-01-28 | 2017-12-08 | 珠海格力电器股份有限公司 | Air conditioner frosting judgment method and device and air conditioning system |
| CN110595137A (en) * | 2019-09-30 | 2019-12-20 | 合肥华凌股份有限公司 | Refrigeration equipment and method and device for identifying fan locked rotor |
| CN110595137B (en) * | 2019-09-30 | 2021-07-23 | 合肥华凌股份有限公司 | Refrigeration equipment and method and device for identifying fan locked rotor |
| CN113091145A (en) * | 2021-03-24 | 2021-07-09 | 青岛海尔空调器有限总公司 | Protection method and device of water washing air device and air conditioner thereof |
| WO2022199055A1 (en) * | 2021-03-24 | 2022-09-29 | 青岛海尔空调器有限总公司 | Method and apparatus for protecting air rinsing apparatus, and air conditioner using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20160309 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |