CN1464278A - Refrigerator electric control air door control device - Google Patents
Refrigerator electric control air door control device Download PDFInfo
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- CN1464278A CN1464278A CN 02135114 CN02135114A CN1464278A CN 1464278 A CN1464278 A CN 1464278A CN 02135114 CN02135114 CN 02135114 CN 02135114 A CN02135114 A CN 02135114A CN 1464278 A CN1464278 A CN 1464278A
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Abstract
The electric controller for refrigerator air door belongs to the domain of temperature control device technology. The electric controller includes stepped motor to drive air door, control logic unit, temperature detecting circuit set inside the refrigerated chamber and the fan motor set inside the refrigerating chamber. It features that there are two sets of temperature detecting circuits in the upper part and the lower part of the refrigerated chamber separately and that the temperature detecting circuit, the control logic unit, stepped motor reversing switch unit, the drive unit and the fan motor control circuit are connected successively. Without air door position detecting sensor, the present invention can ensure the reliable operation of the air door device in various work environments, and is suitable for various great capacity refrigerators.
Description
Technical field
The invention belongs to the field of temperature control equipment, relate in particular to a kind of so that power device is the temperature control equipment of feature.
Technical background
For the dual system refrigerator (referring to have simultaneously the refrigerator of refrigerating chamber and refrigerating chamber) of big capacity (more than 500 liters), the temperature control of its refrigerating chamber is to realize by control refrigeration compressor and the start-stop that is positioned at the fan electromotor of refrigerating chamber at present; The control of the temperature of its refrigerating chamber is by an automatically controlled air door is set on the tank wall between refrigerating chamber and the refrigerating chamber, the cold air of refrigerating chamber is delivered to that refrigerating chamber realizes with the fan that is positioned at refrigerating chamber.
Patent Office of the People's Republic of China (PRC) on August 7th, 1996, disclosed, publication number was the cooling air supply control apparatus that discloses a kind of refrigerator in " cooling air supply control apparatus of refrigerator and the control method thereof " of CN 1128569, this equipment comprises: key operation unit temp checkout gear, control device is in order to according to by the selected mode of operation of this key operation device with controlled the cooling down operation of this refrigerator by this indoor temperature difference that this temperature-detecting device detected; Driving device for step-by-step is used for driving a stepper motor, so that can rotate an eccentric adjusting air door according to the control of this control device; A reed switch detects the position of this eccentric adjusting air door; And the fan electromotor drive unit, be used for driving a fan electromotor.But it exists reed switch life-span weak point, poor reliability in actual use, action is easy to failure and cause the deficiency of air door open and close actions tripping.
Summary of the invention
Goal of the invention of the present invention provides a kind of refrigerator electric control air door control device that does not have the air door position-detection sensor.
Technical scheme of the present invention is: a kind of refrigerator electric control air door control device is provided, comprise the stepper motor, the control logic unit that are used to drive air door, be arranged at the temperature sensing circuit in the refrigerating chamber and be arranged at fan electromotor in the refrigerating chamber, it is characterized in that: be respectively provided to few two groups of temperature sensing circuits in the cold compartment of refrigerator upper and lower, temperature sensing circuit is connected with the control logic unit, the control logic unit is connected with stepper motor reversing switch unit, is connected with the fan electromotor control circuit through driver element simultaneously.
Wherein said temperature sensing circuit is a thermistor, and thermistor is connected with the A/D port of control logic unit; Described control logic unit is a single chip circuit, comprises IC 1; The A/D port of its IC 1 is connected with thermistor, and its I/O port is connected with the control end of reversing switch unit, is connected through the control coil of driver element with fan electromotor operation relay simultaneously; Described reversing switch unit is electronic switching circuit or solid-state relay circuit, and its control end is connected with the I/O port of control logic unit, and its load end is serially connected between power supply and the stepper motor winding; Described driver element is the reverse output driver circuit of Darlington, comprises IC 2; The input of its IC 2 is connected with the I/O port of control logic unit, and its output is connected with an end of fan electromotor operation relay control winding; Described stepper motor is two-phase four utmost point stepper motors; Described fan electromotor is a double-speed motor.
Its described temperature sensing circuit is made of thermistor Rx, Rx ', resistance R 1, R1 ', R2, R2 ', capacitor C 1 and C1 ', wherein, one end of resistance R 1 is connected with power supply Vdd, its other end is connected with an end of resistance R 2 and through resistance R x ground connection, and the other end of resistance R 2 is connected with the A/D1 port of IC 1 and through capacitor C 1 ground connection; One end of resistance R 1 ' is connected with power supply Vdd, and its other end is connected with an end of resistance R 2 ' and through resistance R x ' ground connection, and the other end of resistance R 2 ' is connected with the A/D2 port of control logic unit and through capacitor C 1 ' ground connection.
Its described stepper motor reversing switch unit is made of triode T1～T11, resistance R 5, R7 and diode D1～D8, and wherein, the emitter stage of triode T1～T4 connects the power Vcc end, its colelctor electrode respectively successively with the corresponding connection of colelctor electrode of triode T5～T8; The base stage of triode T1 and T2 is connected with the other side's colelctor electrode respectively, and the base stage of triode T3 and T4 is connected with the other side's colelctor electrode respectively; The emitter stage of triode T5～T8 is connected with the COM end; The base stage of triode T5 is connected with the colelctor electrode of triode T10 and is connected with power supply Vdd end through resistance R 5, the base stage of triode T6 is connected with the base stage of triode T10 and is connected with the I/O1 end of IC 1, and the colelctor electrode of triode T5 and T6 is connected with the A-end with the A of stepper motor M1 winding respectively; The base stage of triode T7 is connected with the colelctor electrode of triode T11 and is connected with power supply Vdd end through resistance R 7, the base stage of triode T8 is connected with the base stage of T11 and is connected with the I/O2 end of IC 1, and the colelctor electrode of triode T7 and T8 is connected with the B-end with the B of stepper motor M1 winding respectively; The colelctor electrode of triode T9 is connected with the COM end, and its base stage is connected with the I/O5 end of IC 1; The grounded emitter of triode T9, T10 and T11; The positive pole of diode D1～D4 and negative pole respectively with corresponding connection of collector and emitter of corresponding sequence number triode, the positive pole of diode D5～D8 and negative pole respectively with corresponding connection of emitter and collector of corresponding sequence number triode.
Its described driver element is by IC 2, relay J
L, J
H, diode DL and DH constitute, wherein, the IN1 of IC 2 and IN2 end respectively with the I/O3 and I/O4 corresponding connection of end of IC 1, its OUT1 and OUT2 hold respectively through relay J
LAnd J
HControl coil be connected with the power Vcc end; Diode D
LAnd D
HBe parallel to relay J
LAnd J
HThe control coil two ends; Two group relay J
LAnd J
HCorresponding respectively being serially connected with between high, low speed coil connectors MH, the ML of power supply V and fan electromotor M2 of major loop contact terminal.
Compared with the prior art, advantage of the present invention is:
1. cancelled the damper positions detecting sensor, the throttle setting that has guaranteed refrigerator all can be for a long time in different working environment (temperature, humidity), normally, action reliably.
2. adopt the two-speed fan motor, can improve the cold air air inflow of refrigerating chamber as required, strengthened the rate of temperature fall in it, shortened ratio running time of fan electromotor, reduce the operating cost of power consumption and refrigerator.
3. the control that opens and closes of air door and fan is controlled by the temperature sensing circuit that is arranged at the refrigerating chamber different parts respectively, the temperature in the further balanced refrigerating chamber helps improving in it stored melon and fruit, Vegetable Preservation degree and extends the shelf life.
Description of drawings
The present invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a circuit block diagram of the present invention;
Fig. 2 is the line map of temperature detection and logic control element in the embodiment of the invention;
Fig. 3 is the line map of stepper motor reversing switch unit in the embodiment of the invention;
Fig. 4 is the line map of stepper motor winding in the embodiment of the invention;
Fig. 5 is the major loop wiring diagram of fan electromotor in the embodiment of the invention;
Fig. 6 is the line map of fan electric-motor drive unit in the embodiment of the invention.
1,2 is temperature sensing circuit among the figure, and 3 is logic control element, and 4 is stepper motor reversing switch unit, and 5 is the fan electromotor driver element, and 6 is fan electromotor.
The specific embodiment
Among Fig. 1, temperature sensing circuit 1 and 2 is arranged at the upper and lower of cold compartment of refrigerator respectively, its temperature detection value is sent in the logic control element 3 and is compared with setting value, I/O port output control pulse by logic control element 3, the action that process stepper motor reversing switch unit 4 removes the control step motor, simultaneously, logic control element 3 is according to the deviation of temperature detection value and setting value, remove to control fan electromotor 6 by fan electromotor driver element 5, make fan electromotor be in high, low speed operating condition or stall as required respectively.
Among Fig. 2, the A/D1 of single-chip microcomputer IC 1 and A/D2 end are accepted the measured temperature of thermistor Rx and Rx ' output respectively, and its I/O1, I/O2 and I/O5 end are exported just commentaries on classics, counter-rotating and the stop signal of stepper motor respectively; Its I/O3 and I/O4 end are exported low, the control signal that runs up of fan electromotor respectively, the double speed operation that fan electromotor is low by connecting respectively, the high speed coil windings realizes fan electromotor.
Among Fig. 3, when single-chip microcomputer IC 1 output air door opening/closing actuating signal W, triode T9 conducting drags down COM point current potential, and when single-chip microcomputer IC 1 was not exported air door opening/closing actuating signal W, triode T9 ended, and COM point current potential raises; When single-chip microcomputer IC 1 output air door opening signal A-A, triode T1, T6, T3 and T8 conducting, power supply is held to A-through T1, stepper motor winding A and is held, hold through T6 to COM, hold to B-through T3, stepper motor winding B and to hold, hold through T8 to COM, the running of stepper motor forward drives air door and opens; Triode T2, T5, T4 and T7 conducting when single-chip microcomputer IC 1 output air door shutdown signal B-B, electric current is held to A through T2, stepper motor winding A-and is held, hold through T5 to COM, hold to B through T4, stepper motor winding B-and to hold, hold through T7 to COM, the stepper motor antiport drives air door and closes; The purpose that sustained diode 1～D8 is set is to prevent that triode from being punctured by the inverse electromotive force of coil windings.
Among Fig. 4, the winding of two-phase four utmost points (direct current) stepper motor M1 is divided into two groups, and when electric current flows into from A and B end, when A-and B-end flowed out, motor just changeed; When electric current flows into from A-and B-end, when A and B end flow out, the motor counter-rotating.
Among Fig. 5, the high, low speed winding MH of two-speed fan motor M 2 and ML are respectively through the major loop contact terminal J of high, low speed relay
HAnd J
LV is connected with power supply; Work as J
HDuring connection, fan electromotor runs up; Work as J
LDuring connection, the fan electromotor low-speed running.
Among Fig. 6, driver element IC 2 is used to improve the on-load capacity of the output contact of IC1, and its input IN1, IN2 are connected with I/O4 with the corresponding I/O output I/O3 of single-chip microcomputer IC1; Its output OUT1 and OUT2 are respectively through fan electromotor height speed control system relay J
HAnd J
LControl coil be connected the major loop contact terminal J of high, low speed control relay with power Vcc
HAnd J
LBe serially connected in respectively between the high, low speed winding MH and ML of power supply V and two-speed fan motor M 2.
IC 1 can be selected the singlechip chip of models such as PIC16C74B, MK8974A or MC68HC908J for use, IC2 can adopt the reverse output driver chip of ULN2XXX series Darlington of ALLEGRO company, as ULN2001, ULN2003 or ULN2004 etc., diode can be selected the 1N4XXX series of products for use, as 1N4148,1N4004 or 1N4007 etc., triode T1～T4 is the positive-negative-positive triode, and T5～T11 is a NPN type triode.
Course of work summary of the present invention: the open and close of air door are by the measured value control of thermistor Rx, as the measured temperature T of Rx
RxWhen exceeding setting value, single-chip microcomputer IC1 sends just changes pulse command, control step driven by motor air door forward is opened, when the just commentaries on classics pulse of sending reaches the setting number, IC1 stops to send is just changeing pulse, air door is opened and is put in place, and the cold air in the refrigerating chamber enters refrigerating chamber under the effect of fan, refrigerating chamber is lowered the temperature; Measured temperature T as Rx
RxWhen being lower than setting value, single-chip microcomputer IC1 sends the inversion pulse instruction,
Control step driven by motor air door is oppositely closed, and when the inversion pulse of sending reaches when setting number, IC1 stops to send inversion pulse, and air door is closed and put in place, and the cooling of refrigerating chamber is stopped.
The high, low speed running of fan is by thermistor Rx ' control, as the measured temperature T of Rx
RxExceed the measured temperature T of Rx '
Rx 'When reaching predetermined value, when each Rx required air door to open, fan electromotor ran up, up to T
Rx-T
Rx 'During=predetermined value, fan electromotor transfers normal speed running to.
The present invention can be widely used in various jumbo refrigerators or refrigerator-freezer.
Claims (10)
1. refrigerator electric control air door control device, comprise the stepper motor, the control logic unit that are used to drive air door, be arranged at the temperature sensing circuit in the refrigerating chamber and be arranged at fan electromotor in the refrigerating chamber, it is characterized in that: be respectively provided to few two groups of temperature sensing circuits in the cold compartment of refrigerator upper and lower, temperature sensing circuit is connected with the control logic unit, the control logic unit is connected with stepper motor reversing switch unit, is connected with the fan electromotor control circuit through driver element simultaneously.
2. according to the described refrigerator electric control air door control device of claim 1, it is characterized in that described temperature sensing circuit is a thermistor, thermistor is connected with the A/D port of control logic unit.
3. according to the described refrigerator electric control air door control device of claim 1, it is characterized in that described control logic unit is a single chip circuit, comprise IC 1; The A/D port of its IC 1 is connected with thermistor, and its I/O port is connected with the control end of reversing switch unit, is connected through the control coil of driver element with fan electromotor operation relay simultaneously.
4. according to the described refrigerator electric control air door control device of claim 1, it is characterized in that described reversing switch unit is electronic switching circuit or solid-state relay circuit, its control end is connected with the I/O port of control logic unit, and its load end is serially connected between power supply and the stepper motor winding.
5. according to the described refrigerator electric control air door control device of claim 1, it is characterized in that described driver element is the reverse output driver circuit of Darlington, comprises IC 2; The input of its IC 2 is connected with the I/O port of control logic unit, and its output is connected with an end of fan electromotor operation relay control winding.
6. according to the described refrigerator electric control air door control device of claim 1, it is characterized in that described stepper motor is two-phase four utmost point stepper motors.
7. according to the described refrigerator electric control air door control device of claim 1, it is characterized in that described fan electromotor is a double-speed motor.
8. according to claim 1,2 or 3 described refrigerator electric control air door control devices, it is characterized in that described temperature sensing circuit is made of thermistor Rx, Rx ', resistance R 1, R1 ', R2, R2 ', capacitor C 1 and C1 ', wherein,
One end of resistance R 1 is connected with power supply Vdd, and its other end is connected with an end of resistance R 2 and through resistance R x ground connection, and the other end of resistance R 2 is connected with the A/D1 port of IC 1 and through capacitor C 1 ground connection;
One end of resistance R 1 ' is connected with power supply Vdd, and its other end is connected with an end of resistance R 2 ' and through resistance R x ' ground connection, and the other end of resistance R 2 ' is connected with the A/D2 port of control logic unit and through capacitor C 1 ' ground connection.
9. according to claim 1,3 or 4 described refrigerator electric control air door control devices, it is characterized in that described stepper motor reversing switch unit is made of triode T1～T11, resistance R 5, R7 and diode D1～D8, wherein,
The emitter stage of triode T1～T4 connects the power Vcc end, its colelctor electrode respectively successively with the corresponding connection of colelctor electrode of triode T5～T8;
The base stage of triode T1 and T2 is connected with the other side's colelctor electrode respectively, and the base stage of triode T3 and T4 is connected with the other side's colelctor electrode respectively;
The emitter stage of triode T5～T8 is connected with the COM end;
The base stage of triode T5 is connected with the colelctor electrode of triode T10 and is connected with power supply Vdd end through resistance R 5, the base stage of triode T6 is connected with the base stage of triode T10 and is connected with the I/O1 end of IC 1, and the colelctor electrode of triode T5 and T6 is connected with the A-end with the A of stepper motor M1 winding respectively;
The base stage of triode T7 is connected with the colelctor electrode of triode T11 and is connected with power supply Vdd end through resistance R 7, the base stage of triode T8 is connected with the base stage of T11 and is connected with the I/O2 end of IC 1, and the colelctor electrode of triode T7 and T8 is connected with the B-end with the B of stepper motor M1 winding respectively;
The colelctor electrode of triode T9 is connected with the COM end, and its base stage is connected with the I/O5 end of IC 1;
The grounded emitter of triode T9, T10 and T11;
The positive pole of diode D1～D4 and negative pole respectively with corresponding connection of collector and emitter of corresponding sequence number triode, the positive pole of diode D5～D8 and negative pole respectively with corresponding connection of emitter and collector of corresponding sequence number triode.
10. according to claim 1,3 or 5 described refrigerator electric control air door control devices, it is characterized in that described driver element is by IC 2, relay J
L, J
H, diode DL and DH constitute, wherein,
The IN1 of IC 2 holds corresponding the connection with the I/O3 and the I/O4 of IC 1 respectively with the IN2 end, and its OUT1 and OUT2 end are respectively through relay J
LAnd J
HControl coil be connected with the power Vcc end;
Diode D
LAnd D
HBe parallel to relay J
LAnd J
HThe control coil two ends;
Two group relay J
LAnd J
HCorresponding respectively being serially connected with between high, low speed coil connectors MH, the ML of power supply V and fan electromotor M2 of major loop contact terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02135114 CN1464278A (en) | 2002-06-14 | 2002-06-14 | Refrigerator electric control air door control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02135114 CN1464278A (en) | 2002-06-14 | 2002-06-14 | Refrigerator electric control air door control device |
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| Publication Number | Publication Date |
|---|---|
| CN1464278A true CN1464278A (en) | 2003-12-31 |
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ID=29744207
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|---|---|---|---|
| CN 02135114 Pending CN1464278A (en) | 2002-06-14 | 2002-06-14 | Refrigerator electric control air door control device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519219A (en) * | 2011-12-26 | 2012-06-27 | 合肥美的荣事达电冰箱有限公司 | Refrigerator and control method for air door of refrigerator |
| CN102937356A (en) * | 2012-11-30 | 2013-02-20 | 合肥美的荣事达电冰箱有限公司 | Driving device of electric air door and water tank provided with driving device |
| CN102967105A (en) * | 2012-12-06 | 2013-03-13 | 合肥美的荣事达电冰箱有限公司 | Driving device for electric air door and refrigerator with same |
| CN102980347A (en) * | 2012-12-03 | 2013-03-20 | 合肥美的荣事达电冰箱有限公司 | Electric air door driving device and refrigerator |
| CN103575056A (en) * | 2013-11-04 | 2014-02-12 | 合肥美的电冰箱有限公司 | Control method and temperature detection method of refrigerator |
| CN103900343A (en) * | 2014-04-04 | 2014-07-02 | 合肥美的电冰箱有限公司 | Refrigerator air door opening and closing control system and refrigerator air door closing control method |
| CN103900342A (en) * | 2014-04-04 | 2014-07-02 | 合肥美的电冰箱有限公司 | Air door closing in-place detecting device and refrigerating plant |
| CN104879996A (en) * | 2015-05-29 | 2015-09-02 | 海信容声(广东)冰箱有限公司 | Detecting and limiting structure of air door of refrigeration device |
-
2002
- 2002-06-14 CN CN 02135114 patent/CN1464278A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519219B (en) * | 2011-12-26 | 2014-03-26 | 合肥美的电冰箱有限公司 | Refrigerator and control method for air door of refrigerator |
| CN102519219A (en) * | 2011-12-26 | 2012-06-27 | 合肥美的荣事达电冰箱有限公司 | Refrigerator and control method for air door of refrigerator |
| CN102937356A (en) * | 2012-11-30 | 2013-02-20 | 合肥美的荣事达电冰箱有限公司 | Driving device of electric air door and water tank provided with driving device |
| CN102937356B (en) * | 2012-11-30 | 2015-06-17 | 合肥美的电冰箱有限公司 | Driving device of electric air door and water tank provided with driving device |
| CN102980347A (en) * | 2012-12-03 | 2013-03-20 | 合肥美的荣事达电冰箱有限公司 | Electric air door driving device and refrigerator |
| CN102980347B (en) * | 2012-12-03 | 2015-02-25 | 合肥美的电冰箱有限公司 | Electric air door driving device and refrigerator |
| CN102967105A (en) * | 2012-12-06 | 2013-03-13 | 合肥美的荣事达电冰箱有限公司 | Driving device for electric air door and refrigerator with same |
| CN102967105B (en) * | 2012-12-06 | 2015-08-26 | 合肥美的电冰箱有限公司 | A kind of drive unit for MOD and there is its refrigerator |
| CN103575056A (en) * | 2013-11-04 | 2014-02-12 | 合肥美的电冰箱有限公司 | Control method and temperature detection method of refrigerator |
| CN103900343A (en) * | 2014-04-04 | 2014-07-02 | 合肥美的电冰箱有限公司 | Refrigerator air door opening and closing control system and refrigerator air door closing control method |
| CN103900342A (en) * | 2014-04-04 | 2014-07-02 | 合肥美的电冰箱有限公司 | Air door closing in-place detecting device and refrigerating plant |
| CN103900342B (en) * | 2014-04-04 | 2016-02-24 | 合肥美的电冰箱有限公司 | Air door is closed into level detecting apparatus and refrigerating plant |
| CN104879996A (en) * | 2015-05-29 | 2015-09-02 | 海信容声(广东)冰箱有限公司 | Detecting and limiting structure of air door of refrigeration device |
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