CN210724185U - Air conditioner fan control unit with fan blocking, fan short circuit and overcurrent protection - Google Patents
Air conditioner fan control unit with fan blocking, fan short circuit and overcurrent protection Download PDFInfo
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- CN210724185U CN210724185U CN201921316350.3U CN201921316350U CN210724185U CN 210724185 U CN210724185 U CN 210724185U CN 201921316350 U CN201921316350 U CN 201921316350U CN 210724185 U CN210724185 U CN 210724185U
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Abstract
The utility model provides an air conditioner fan control unit with fan lock-rotor, fan short circuit and overcurrent protection, including voltage stabilizing circuit, singlechip chip, triode drive circuit, MOS pipe, triode drive circuit control MOS pipe, MOS pipe are as air conditioner fan's electronic switch, have inserted at the anodal input end of power of MOS pipe and have overflowed feedback circuit and be connected with singlechip chip. The utility model is provided with the overcurrent feedback circuit, the singlechip chip detects the voltage value at two ends of the resistor in the MOS tube through the overcurrent feedback circuit, the voltage comparison is carried out by the singlechip chip, the overcurrent feedback circuit can feed back to the singlechip chip in time when the air conditioner fan is locked, short-circuited or overcurrent, the MOS tube can be cut off quickly, the air conditioner fan is disconnected, and the protection is realized; when the fault is relieved, the single chip microcomputer chip detects a stable current signal of the overcurrent feedback circuit, and the control function is automatically recovered.
Description
Technical Field
The utility model belongs to vehicle air conditioner fan control unit, especially have the air conditioner fan control unit of fan lock-rotor, fan short circuit and overcurrent protection.
Background
At present, an air conditioner fan control unit in the market is not designed under the condition of abnormity or limitation (the fan cannot rotate after being blocked and is positioned as a locked rotor, or a control circuit is short-circuited or overflows), and the air conditioner fan control unit is not designed with various circuit protection functions, so that products are damaged.
Disclosure of Invention
In order to solve current air conditioner fan control unit and not set up the protect function under unusual or the limit condition, the utility model provides an air conditioner fan control unit with fan stall, fan short circuit and overcurrent protection, the air conditioner fan has the stall, short circuit, shuts off the circuit output immediately when overflowing the abnormal conditions, and product automatic recovery work after the trouble contacts.
Therefore, the technical scheme of the utility model is that: air conditioner fan control unit with fan stifled commentaries on classics, fan short circuit and overcurrent protection, its characterized in that: including voltage stabilizing circuit, singlechip chip, triode drive circuit, MOS pipe, vehicle mounted power supplies power for singlechip chip, the control port of singlechip chip respectively with triode drive circuit connection after voltage stabilizing system steady voltage, triode drive circuit control MOS pipe, the control circuit of air conditioner fan is gone into to the MOS pipe, the electronic switch of air conditioner fan, its characterized in that are regarded as to the MOS pipe: an overcurrent feedback circuit is connected to the positive input end of the power supply of the MOS tube and is connected with the singlechip chip.
The technical scheme is further limited as follows: the overcurrent feedback circuit consists of a diode, a first resistor, a second resistor and a capacitor, wherein the first resistor and the capacitor are connected between the anode and the cathode of a power supply in series, the second resistor is connected between the first resistor and the capacitor, the other end of the second resistor is input into a control port of the single chip microcomputer chip, the diode is connected between the first resistor and the capacitor, and the other end of the diode is connected with the anode input end of the power supply of the MOS tube; by the arrangement, when the air conditioner fan is locked, short-circuited or overcurrent, a current increase signal can be fed back to the single chip microcomputer chip in time, the single chip microcomputer chip outputs a cut-off signal, and the air conditioner fan is switched off to realize protection; when the fault is relieved, the single chip microcomputer chip detects a stable current signal of the overcurrent feedback circuit, and the control function is automatically recovered.
The utility model has the advantages that: the over-current feedback circuit is arranged, the single chip microcomputer chip detects voltage values at two ends of the resistor in the MOS tube through the over-current feedback circuit, the voltage comparison is carried out by the single chip microcomputer chip, when the air conditioner fan is locked, short-circuited or over-current, the over-current feedback circuit can timely feed back a current increase signal to the single chip microcomputer chip, the MOS tube can be quickly cut off, the air conditioner fan is disconnected, and the protection is realized; when the fault is relieved, the single chip microcomputer chip detects a stable current signal of the overcurrent feedback circuit, and the control function is automatically recovered.
Drawings
Fig. 1 is a block diagram of the circuit of the present invention.
Fig. 2 is a schematic circuit diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the air conditioner fan control unit with fan lock-rotor, fan short circuit and overcurrent protection comprises a voltage stabilizing circuit, a single chip, a triode driving circuit and an MOS tube, wherein a vehicle-mounted power supply supplies power to the single chip after being stabilized by a voltage stabilizing system, a control port of the single chip is respectively connected with the triode driving circuit, the triode driving circuit controls the MOS tube, the MOS tube is connected into a control circuit of the air conditioner fan, the MOS tube is used as an electronic switch of the air conditioner fan, and an overcurrent feedback circuit is connected to the positive input end of the power supply of the MOS tube and is connected with the single chip.
As shown in fig. 2, it is a schematic circuit diagram of an air conditioner blower control unit with blower blocking, blower short-circuit and overcurrent protection, in which a voltage regulator circuit is omitted, a resistor R1, a resistor R2, a resistor R3, a transistor Q1 and a transistor Q3 constitute a transistor blower driving circuit, the transistor blower driving circuit controls a MOS transistor Q2, a MOS transistor Q2 is connected to a control circuit of the air conditioner blower M, and a MOS transistor Q2 is an electronic switch of the air conditioner blower M; the control port of the singlechip chip U is connected with the triode fan driving circuit; the overcurrent feedback circuit consists of a diode D6, a first resistor R26, a second resistor R27 and a capacitor C44, the first resistor R26 and the capacitor C44 are connected between the anode and the cathode of a power supply in series, the second resistor 27 is connected between a first resistor R26 and the capacitor C44, the other end of the second resistor R27 is input to a control port of the single chip microcomputer chip U, a diode D6 is connected between the first resistor R26 and the capacitor C44, and the other end of the diode D6 is connected with the anode input end of the power supply of the MOS transistor Q2; by the arrangement, when the air conditioner fan is locked, short-circuited or overcurrent, a current increase signal can be fed back to the single chip microcomputer chip in time, the single chip microcomputer chip outputs a cut-off signal, and the air conditioner fan is switched off to realize protection; when the fault is relieved, the single chip microcomputer chip detects a stable current signal of the overcurrent feedback circuit, and the control function is automatically recovered.
For those skilled in the art, simple combination, equivalent replacement, and further improvement without departing from the technical concept of the present invention shall be included in the protection scope of the present invention.
Claims (2)
1. Air conditioner fan control unit with fan stifled commentaries on classics, fan short circuit and overcurrent protection, its characterized in that: the vehicle-mounted power supply supplies power to the singlechip chip after voltage stabilization through a voltage stabilization system, a control port of the singlechip chip is connected with the triode drive circuit respectively, the triode drive circuit controls the MOS tube, the MOS tube is connected into a control circuit of an air conditioner fan, the MOS tube serves as an electronic switch of the air conditioner fan, and an overcurrent feedback circuit is connected with the singlechip chip at the positive power input end of the MOS tube.
2. An air conditioner fan control unit with fan stalling, fan short circuit and overcurrent protection as set forth in claim 1, wherein: the overcurrent feedback circuit is composed of a diode, a first resistor, a second resistor and a capacitor, wherein the first resistor and the capacitor are connected in series between the anode and the cathode of a power supply, the second resistor is connected between the first resistor and the capacitor, the other end of the second resistor is input into a control port of the single chip microcomputer chip, the diode is connected between the first resistor and the capacitor, and the other end of the diode is connected with the anode input end of the power supply of the MOS tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921316350.3U CN210724185U (en) | 2019-08-14 | 2019-08-14 | Air conditioner fan control unit with fan blocking, fan short circuit and overcurrent protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921316350.3U CN210724185U (en) | 2019-08-14 | 2019-08-14 | Air conditioner fan control unit with fan blocking, fan short circuit and overcurrent protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210724185U true CN210724185U (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921316350.3U Active CN210724185U (en) | 2019-08-14 | 2019-08-14 | Air conditioner fan control unit with fan blocking, fan short circuit and overcurrent protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210724185U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060298A (en) * | 2020-08-04 | 2022-02-18 | 广东美的环境电器制造有限公司 | Control circuit and method of electric fan |
-
2019
- 2019-08-14 CN CN201921316350.3U patent/CN210724185U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060298A (en) * | 2020-08-04 | 2022-02-18 | 广东美的环境电器制造有限公司 | Control circuit and method of electric fan |
| CN114060298B (en) * | 2020-08-04 | 2023-11-17 | 广东美的环境电器制造有限公司 | Control circuit and method of electric fan |
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