CN201248023Y - Control circuit for DC fan motor of outdoor unit of air conditioner - Google Patents
Control circuit for DC fan motor of outdoor unit of air conditioner Download PDFInfo
- Publication number
- CN201248023Y CN201248023Y CNU2008200512438U CN200820051243U CN201248023Y CN 201248023 Y CN201248023 Y CN 201248023Y CN U2008200512438 U CNU2008200512438 U CN U2008200512438U CN 200820051243 U CN200820051243 U CN 200820051243U CN 201248023 Y CN201248023 Y CN 201248023Y
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- CN
- China
- Prior art keywords
- fan motor
- control circuit
- outdoor unit
- air
- control
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- Expired - Fee Related
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- Air Conditioning Control Device (AREA)
Abstract
The utility model discloses a control circuit used for a DC fan motor of an outdoor air conditioner, which comprises a DC fan motor feed circuit, a control chip and a DC fan motor drive control circuit, wherein the DC fan motor drive control circuit is connected with the control chip. The control circuit is characterized in that a control port of the DC fan motor is connected with a voltage stabilizer in the DC fan motor drive control circuit. Because the voltage stabilizer is added, the voltage of the motor drive circuit is stabilized, and the damage of the control circuit to a control system at the inner part of the motor when the voltage is unstable can be effectively prevented.
Description
Technical field
The utility model relates to DC motor control circuit, specifically is a kind of control circuit that is used for the air-conditioner outdoor unit dc fan motor.
Background technology
The dc fan motor drive circuit of air-conditioner outdoor unit use at present generally all is that control chip passes through a photoelectrical coupler driving control of DC end, detects the speed detection signal of direct current machine output again by the another one photoelectrical coupler.If dc fan motor control end voltage instability or circuit elements device lost efficacy, derate etc., just may cause the control end overtension and damage motor.In addition, because air-conditioner outdoor unit generally all is installed in the open air, if do not add protective circuit, when running into high wind or typhoon when outdoor dc fan motor is not opened, wind can blow the electric fan rotation.Because the dc fan running direct voltage that cutting magnetic field produced, electrochemical capacitor is charged, when voltage reaches certain value, the Switching Power Supply action, air-conditioning electric-control system circuit working, current sinking causes frequent switch motion such as relay, master chip, indicator light then, can cause the damage to circuit elements device, system.Simultaneously,, this moment blower fan is driven and to cause driving unusual, even can damage motor if dc fan is in the high speed reverse rotation state.
The utility model content
The technical problems to be solved in the utility model provides a kind ofly can effectively be avoided the DC motor control circuit voltage instability and damage the control circuit of the air-conditioner outdoor unit dc fan motor of motor.
The realization the technical solution of the utility model is:
A kind of control circuit that is used for the air-conditioner outdoor unit dc fan motor, comprise dc fan motor power supply circuits, control chip, dc fan motor Drive and Control Circuit, the dc fan motor Drive and Control Circuit links to each other with control chip, it is characterized in that in the described dc fan motor Drive and Control Circuit, connecting pressurizer at the control port of dc fan motor.
In order to make circuit not only simply but also effective, described pressurizer is a voltage stabilizing didoe.
Further, in order to prevent that outdoor high wind causes dc fan motor to be the generator operation state, thereby air-conditioner control system is caused damage when shutting down, in the described dc fan motor power supply circuits, its direct current is imported diode of anodal series connection.
Further, the negative pole of described diode is imported between the negative pole with direct current and is being connected a resistance.This resistance is discharge resistance, and the power consumption that is produced in the time of dc fan motor being generator operation falls.
Further, electric capacity in parallel on the described resistance.
Further; the described control circuit that is used for the air-conditioner outdoor unit dc fan motor also comprises the dc fan motor velocity checking circuits that links to each other with control chip; when the dc fan motor prestart detects wind speed greater than certain rotating speed (as 400RPM); control chip will no longer send drive signal, thus the protection dc fan motor.
The utility model compared with prior art possesses following characteristics:
1, by increasing pressurizer at the dc fan motor control end, the voltage of stable electrical drive circuit causes damage to the motor internal control system when preventing the control circuit voltage instability.
2, by at the anodal protection diode that increases of dc fan motor direct current input, prevent that dc fan motor from causing damage to air-conditioner control system under the generator operation state.
When 3, the drive condition by software design control dc fan motor, prestart detect wind speed greater than certain rotating speed (as 400RPM), control chip will no longer send drive signal.In the time of can avoiding motor to move under external force, motor-driven is caused damage.
Description of drawings
Fig. 1 is the circuit theory diagrams of embodiment 1.
Embodiment
The utility model is further described below in conjunction with drawings and Examples.
As shown in Figure 1, a kind of control circuit that is used for the air-conditioner outdoor unit dc fan motor comprises dc fan motor power supply circuits, dc fan motor Drive and Control Circuit, dc fan motor velocity checking circuits.CN1 is the dc fan motor interface, and port one connects dc power anode, and port 2 is unsettled, and port 3 connects dc power cathode, and port 4 meets direct current 15V, and port 5 is Electric Machine Control ends, and port 6 is motor speed test sides.In the dc fan motor power supply circuits, P+, N-be AC through over commutation, filtered DC power supply, wherein P+ is that dc power anode, N-are dc power cathode, in the present embodiment, DC power supply voltage is 310V.DC power supply is supplied with dc fan motor, if frequency-variable air conditioner outdoor machine also can be powered to frequency-variable module through E3, E4, the filtering of E5 electrochemical capacitor.Wherein protective tube FUSE1 plays a protective role to circuit when motor breaks down according to the power type selecting of fan electromotor; E2 (as 82uF/400V) plays filter action, effectively suppresses the harmonic wave of dc fan motor power supply; R9 is a discharge power resistance, when automatically controlled outage or fan electromotor outside the air conditioning chamber generate electricity, can discharge the electric weight of E2 by this resistance.If the dc fan motor of air-conditioner outdoor unit is subjected to typhoon or high wind is done the time spent, be in operation state of generator probably, motor will produce a power supply like this.For preventing that the power supply that motor produces from entering the air-conditioning electric-control system, at the dc power anode adding diode D1 of dc fan motor power supply circuits.When dc fan motor was in generator operation, D1 can oppositely end, and prevented that effectively the electricity that motor sends from entering the air-conditioning electric-control system, avoids electric-control system to be damaged.
In the dc fan motor Drive and Control Circuit, resistance R 3, R1 form bleeder circuit, make at 1 point voltage less than DC MOTOR CONTROL end 5 maximum input voltages (as 6V), are used to drive dc fan motor; R2, R5, R7 are the current-limiting resistance of Drive and Control Circuit.R7 is connected to control chip by the J1 end, and control chip is controlled photoelectrical coupler IC1 by driving Q1, and then realizes the drive controlling to dc fan motor.Wherein increase voltage-stabiliser tube DZ1, the effective voltage that drives mouthful of stable DC fan electromotor makes this voltage can be not too high, can play a very good protection to motor like this.
The dc fan motor velocity checking circuits comprises photoelectrical coupler IC2, and the transmitting terminal of photoelectrical coupler IC2 is connected with resistance R 4, is connected in the speed detection port 6 of dc fan motor; The receiving terminal of photoelectrical coupler IC2 links to each other with resistance R 6, R8 and capacitor C 2, the other end ground connection of C2, and the other end connection+5V direct voltage of R6, the other end of R8 links to each other with control chip by the J2 end.
Before the air-conditioning electric-control system drives dc fan motor, if dc fan motor rotation, will be in speed detection port 6 output signals, rate signal feeds back to control chip by the IC2 photoelectrical coupler, and control chip is judged the running speed of motor by the signal of 2 of detection speed testing circuits.If detect wind speed greater than certain rotating speed (as 400RPM), then control chip can not send the drive signal to dc fan motor, motor is not driven, and directly utilizes this rotating speed to carry out condenser for outdoor unit of air conditioner and changes " heat ".When dc fan motor is subjected to high wind or typhoon influence running outside the air conditioning chamber like this, can effectively prevent from motor is started the damage that causes motor.
More than, can effectively avoid dc fan motor outside the air conditioning chamber by the present embodiment circuit, when being subjected to high wind or typhoon to do, the air-conditioning electric-control system is caused damage in order to generator operation.Also improved simultaneously the reliability that drives dc fan motor greatly.
Claims (6)
1, a kind of control circuit that is used for the air-conditioner outdoor unit dc fan motor, comprise dc fan motor power supply circuits, control chip, dc fan motor Drive and Control Circuit, the dc fan motor Drive and Control Circuit links to each other with control chip, it is characterized in that in the described dc fan motor Drive and Control Circuit, connecting pressurizer at the control port of dc fan motor.
2, the control circuit that is used for the air-conditioner outdoor unit dc fan motor according to claim 1 is characterized in that described pressurizer is a voltage stabilizing didoe.
3, the control circuit that is used for the air-conditioner outdoor unit dc fan motor according to claim 1 is characterized in that in the described dc fan motor power supply circuits, diode of the anodal series connection of its direct current input.
4, be connected a resistance between the control circuit that is used for the air-conditioner outdoor unit dc fan motor according to claim 3, the negative pole that it is characterized in that described diode and direct current input negative pole.
5, the control circuit that is used for the air-conditioner outdoor unit dc fan motor according to claim 4 is characterized in that on the described resistance electric capacity in parallel.
6, according to each described control circuit that is used for the air-conditioner outdoor unit dc fan motor of claim 1 to 5, it is characterized in that also comprising the dc fan motor velocity checking circuits that links to each other with control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200512438U CN201248023Y (en) | 2008-07-24 | 2008-07-24 | Control circuit for DC fan motor of outdoor unit of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200512438U CN201248023Y (en) | 2008-07-24 | 2008-07-24 | Control circuit for DC fan motor of outdoor unit of air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201248023Y true CN201248023Y (en) | 2009-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200512438U Expired - Fee Related CN201248023Y (en) | 2008-07-24 | 2008-07-24 | Control circuit for DC fan motor of outdoor unit of air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201248023Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538141A (en) * | 2012-01-18 | 2012-07-04 | 广东美的电器股份有限公司 | Starting control method for direct-current fan motor of air conditioner |
| CN104833061A (en) * | 2015-05-22 | 2015-08-12 | 广东美的暖通设备有限公司 | Air-conditioner and protection and control method and device thereof |
| CN111895589A (en) * | 2020-06-08 | 2020-11-06 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and air conditioner |
| CN113339988A (en) * | 2021-05-31 | 2021-09-03 | 青岛海尔空调器有限总公司 | Control circuit and control method for air conditioner outdoor unit and air conditioner |
-
2008
- 2008-07-24 CN CNU2008200512438U patent/CN201248023Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538141A (en) * | 2012-01-18 | 2012-07-04 | 广东美的电器股份有限公司 | Starting control method for direct-current fan motor of air conditioner |
| CN104833061A (en) * | 2015-05-22 | 2015-08-12 | 广东美的暖通设备有限公司 | Air-conditioner and protection and control method and device thereof |
| CN104833061B (en) * | 2015-05-22 | 2017-12-08 | 广东美的暖通设备有限公司 | Air conditioner and its protection control method and protection control device |
| CN111895589A (en) * | 2020-06-08 | 2020-11-06 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and air conditioner |
| CN113339988A (en) * | 2021-05-31 | 2021-09-03 | 青岛海尔空调器有限总公司 | Control circuit and control method for air conditioner outdoor unit and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: MIDEA GROUP WUHAN REFRIGERATION EQUIPMENT CO., LTD Free format text: FORMER OWNER: MEIDI ELECTRIC APPLIANCES CO., LTD., GUANGDONG Effective date: 20101222 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 528311 MIDEA INDUSTRY CITY, PENGLAI ROAD, BEIJIAO TOWN, SHUNDE DISTRICT, FOSHAN CITY, GUANGDONG PROVINCE TO: 430056 MIDEA INDUSTRIAL PARK, FENGSHU ROAD 4, ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE, WUHAN CITY, HUBEI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20101222 Address after: 430056, Hubei Wuhan economic and Technological Development Zone Maple four road, the United States Industrial Park Patentee after: Wuhan Refrigeration Equipment Co., Ltd. of Midea Group Address before: 528311 Foshan, Shunde District, Beijiao Town, Penglai Road, the United States Industrial City Patentee before: Meidi Electric Appliances Co., Ltd., Guangdong |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090527 Termination date: 20170724 |