CN204895037U - Vehicle air conditioner compressor protector circuit - Google Patents
Vehicle air conditioner compressor protector circuit Download PDFInfo
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- CN204895037U CN204895037U CN201520652650.4U CN201520652650U CN204895037U CN 204895037 U CN204895037 U CN 204895037U CN 201520652650 U CN201520652650 U CN 201520652650U CN 204895037 U CN204895037 U CN 204895037U
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- type triode
- npn type
- diode
- phase inverter
- resistance
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Abstract
The utility model discloses a vehicle air conditioner compressor protector circuit, including the first phase inverter and the second phase inverter of establishing ties, the positive pole of first diode is connected to the input of first phase inverter, and the base of a NPN type triode is connected to the output of second phase inverter, the negative pole of third diode is connected to the negative pole of second diode, the anodal rectified voltage of connection of third diode inputs, the base of connecting the 2nd NPN type triode behind the collecting electrode series connection third phase inverter of a NPN type triode, the fourth phase inverter, the projecting pole of the 3rd NPN type triode, the projecting pole of PNP type triode are connected with the grid of N channel MOS pipe, connect off -load resistance between the drain electrode of rectified voltage input and N channel MOS pipe. The utility model discloses can guarantee not empty load for a long time and high rotational speed operation of vehicle air conditioner compressor, lead to the fact compressor to damage after avoiding the controller to damage simultaneously. The utility model discloses be fit for popularizing and applying in the vehicle air conditioner system.
Description
Technical field
The utility model belongs to automotive air-conditioning controller field, is specifically related to a kind of protector for automobile air conditioning refrigerating compressor, for realizing off-load and the no-load protection of automobile air conditioning refrigerating compressor.
Background technology
Automotive air-conditioning system is primarily of compositions such as compressor (compressor), electric control clutch, condenser (condenser), evaporator (evaporator), expansion valve (expansionvalve), drier receiver (receiverdrier), pipeline (hoses), condenser fan, vacuum solenoid (vacuumsolenoid), idling device and control system.
Refrigerating compressor is the heart of automotive air-conditioning system, is responsible for compression and the periodical duty of cooling system.The effect of refrigerating compressor in compression-type refrigerating system is that then gaseous refrigerant pressurization is delivered to cooling and condensation in condenser.Refrigerating compressor is that the operation of refrigeration system provides power.
The confidential test that can stand severe condition of service of refrigerant compression, has reliability and durability.When idling, in automobile engine nacelle, temperature is sometimes high up to 80 DEG C of condensing pressures, requires that refrigerant compression function bears high temperature and high pressure and limited overload.Just be kept on all air conditioning for automobiles after a lot of car owner usually gets on the bus, the long-time air conditioning for automobiles that uses can make condenser exhaust gas hypertonia, causes loss to refrigeration system.Input voltage is too high can direct overvoltage destruct limit device, and controller causes again refrigerating compressor load short circuits after damaging.Accumulator capacity is inadequate, line drop is large, electric current is excessive, capacitance contact is bad etc. can cause refrigerating compressor to damage or controller damages, and causes to control out of control, causes power generating system to collapse.Therefore, the protection of automobile air conditioning refrigerating compressor is even more important.
Utility model content
In above-mentioned special or ultimate limit state, abnormal problem easily occurs for existing automobile air conditioning refrigerating compressor, applicant, through linguistic term, now provides a kind of automobile air conditioning refrigerating compressor protector circuit.
The technical solution of the utility model is as follows:
A kind of automobile air conditioning refrigerating compressor protector circuit, comprise the first phase inverter and second phase inverter of series connection, the input end of the first phase inverter connects the first drop-down resistance and connects the positive pole of the first diode after the second resistance of connecting, and the negative pole of the first diode connects commutating voltage input; The base stage of the first NPN type triode is connected after mouth series connection the 3rd resistance of the second phase inverter; Between the base stage that 4th resistance is connected to the first NPN type triode and emitter, the grounded emitter of the first NPN type triode, the collecting electrode of the first NPN type triode connects the first drop-down electric capacity and connects the negative pole of the second diode after the 5th resistance of connecting; The positive ground of the second diode, connects the negative pole of the 3rd diode after negative pole series connection the 6th resistance of the second diode; The negative pole of the 3rd diode connects the second drop-down electric capacity, and the positive pole of the 3rd diode connects commutating voltage input; Collecting electrode series connection the 3rd phase inverter, the 4th phase inverter and the base stage being connected the second NPN type triode after the 7th resistance of the first NPN type triode; Between the base stage being connected to the second NPN type triode after 3rd electric capacity and the 8th resistor coupled in parallel and emitter, the collecting electrode of the second NPN type triode is connected with the base stage of the 3rd NPN type triode and the base stage of PNP type triode; The base stage of the 3rd NPN type triode connects the negative pole of the 4th diode, the positive ground of the 4th diode, between the base stage that 9th resistance is connected to the 3rd NPN type triode and collecting electrode, after collecting electrode series connection the tenth resistance of the 3rd NPN type triode, connect the negative pole of the 3rd diode; The emitter of the 3rd NPN type triode, the emitter of PNP type triode are all connected with the grid of N-channel MOS pipe, the source grounding of the emitter of the second NPN type triode, the collecting electrode of PNP type triode, N-channel MOS pipe; Electric power generation unloading resistance is connected between commutating voltage input and the drain electrode of N-channel MOS pipe.
Advantageous Effects of the present utility model is:
The utility model can ensure that automobile air conditioning refrigerating compressor can not zero load for a long time and high rotating speed run, can avoid damaging because controller damages the automobile air conditioning refrigerating compressor caused, the utility model is highly suitable in automotive air-conditioning system and applies simultaneously.
Advantage of the present utility model provides in the description of detailed description of the invention part below, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Fig. 1 is schematic circuit 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 further.
The utility model on electrical equipment independent of automotive air-conditioning controller, for the protection of automotive air-conditioning controller and refrigerating compressor.
As shown in Figure 1, the utility model comprises phase inverter U1A and the phase inverter U1B of series connection.The input end of phase inverter U1A connects drop-down resistance R2, and connects the positive pole of diode D2 after series resistance R1, and the negative pole of diode D2 connects commutating voltage input Vin.The base stage of NPN type triode Q1 is connected after the mouth series resistance R4 of phase inverter U1B.Resistance R5 is connected between the base stage of NPN type triode Q1 and emitter.The grounded emitter of NPN type triode Q1, collecting electrode connects drop-down electric capacity C2 and connects the negative pole of diode D4 after series resistance R6.The positive ground of diode D4, connects the negative pole of diode D3 after the negative pole series resistance R3 of diode D4.The negative pole of diode D3 connects drop-down electric capacity C1, and the positive pole of diode D3 connects commutating voltage input Vin.Collecting electrode series connection phase inverter U1C, the phase inverter U1D of NPN type triode Q1 and the base stage being connected NPN type triode Q3 after resistance R8.Be connected between the base stage of NPN type triode Q3 and emitter after electric capacity C3 and resistance R10 parallel connection.The collecting electrode of NPN type triode Q3 is connected with the base stage of the base stage of NPN type triode Q2 and PNP type triode Q4; The base stage of NPN type triode Q2 connects the negative pole of diode D5, and the positive ground of diode D5, resistance R11 is connected between the base stage of NPN type triode Q2 and collecting electrode, connects the negative pole of diode D3 after the collector series resistance R9 of NPN type triode Q2.The emitter of NPN type triode Q2, the emitter of PNP type triode Q4 are all connected with the grid of N-channel MOS pipe QX.The source grounding of the emitter of NPN type triode Q3, the collecting electrode of PNP type triode Q4, N-channel MOS pipe QX.Electric power generation unloading resistance RX is connected between commutating voltage input Vin and the drain electrode of N-channel MOS pipe QX.
Principle of work of the present utility model is as follows:
As shown in Figure 1, when the rectification input Vin voltage of automobile air conditioning refrigerating compressor exceedes rated voltage, the potential-divider network be made up of zener diode D2, resistance R1 and resistance R2 makes the 1 pin input high level of phase inverter U1A, export high level by 4 pin of phase inverter U1B and make aerotron Q1 conducting, electric capacity C2 is discharged, the 5 pin input low levels of phase inverter U1C subsequently, the input of aerotron Q3 is closed, the metal-oxide-semiconductor driving circuit outputting drive voltage be made up of aerotron Q2 and aerotron Q4, make metal-oxide-semiconductor QX conducting, connect electric power generation unloading resistance RX, make refrigerating compressor off-load.Off-load starts, refrigerating compressor voltage drop, the 1 pin input of phase inverter U1A becomes low level, and aerotron Q1 closes, resistance R6 starts to charge to electric capacity C2, the 5 pin input high levels of phase inverter U1C, aerotron Q3 conducting, the metal-oxide-semiconductor QX of driving closes, electric power generation unloading resistance RX disconnects, refrigerating compressor input voltage starts to rise, off-load again, circulation said process.Namely refrigerating compressor input voltage exceedes rated voltage and will produce PWM off-load pulse.If do not connect storage battery and first connect refrigerating compressor, then the moment accessed carries out off-load operation release portion energy immediately, and provide underload when access automotive air-conditioning controller, incision moment can not cause large shake to refrigerating compressor, avoids damaging; And the energy of impact is discharged by electric power generation unloading resistance, voltge surge can not be caused to automotive air-conditioning controller, can not due to high input voltage damage car air-conditioner controller, even and if storage battery collapse causes refrigerating compressor no-load operation in automotive air-conditioning controller Long-Time Service process, also refrigerating compressor can be made to add load, and the High Rotation Speed avoiding zero load to cause damages refrigerating compressor.
Above-described components and parts are commercial goods, and the components and parts model in embodiment can see table:
Main components table in Fig. 1:
| Sequence number | Components and parts code name | Components and parts type | Component parameter or model |
| 1 | U1A、U1B、U1C、U1D | Schmitt inverter | 74HC14 |
| 2 | QX | Off-load metal-oxide-semiconductor | 120N15 |
| 3 | Q1、Q2、Q3 | NPN type triode | 2N551 |
| 4 | Q4 | PNP type triode | 2N5401 |
| 5 | RX | Off-load power resistor |
Above-described is only preferred implementation of the present utility model, and the utility model is not limited to above embodiment.Be appreciated that the oher improvements and changes that those skilled in the art directly derive or associate under the prerequisite not departing from basic conception of the present utility model, all should think and be included within protection domain of the present utility model.
Claims (1)
1. an automobile air conditioning refrigerating compressor protector circuit, it is characterized in that: the first phase inverter (U1A) and the second phase inverter (U1B) that comprise series connection, the input end of the first phase inverter (U1A) connects drop-down the first resistance (R2) and the second resistance (R1) of connecting connects the positive pole of the first diode (D2) afterwards, and the negative pole of the first diode (D2) connects commutating voltage input (Vin); Mouth series connection the 3rd resistance (R4) of the second phase inverter (U1B) connects the base stage of the first NPN type triode (Q1) afterwards; Between the base stage that 4th resistance (R5) is connected to the first NPN type triode (Q1) and emitter, the grounded emitter of the first NPN type triode (Q1), the collecting electrode of the first NPN type triode (Q1) connects drop-down the first electric capacity (C2) and the 5th resistance (R6) of connecting connects the negative pole of the second diode (D4) afterwards; The positive ground of the second diode (D4), negative pole series connection the 6th resistance (R3) of the second diode (D4) connects the negative pole of the 3rd diode (D3) afterwards; The negative pole of the 3rd diode (D3) connects drop-down the second electric capacity (C1), and the positive pole of the 3rd diode (D3) connects commutating voltage input (Vin); Collecting electrode series connection the 3rd phase inverter (U1C) of the first NPN type triode (Q1), the 4th phase inverter (U1D) and the 7th resistance (R8) are connected the base stage of the second NPN type triode (Q3) afterwards; Between the base stage being connected to the second NPN type triode (Q3) after 3rd electric capacity (C3) and the 8th resistance (R10) parallel connection and emitter, the collecting electrode of the second NPN type triode (Q3) is connected with the base stage of the 3rd NPN type triode (Q2) and the base stage of PNP type triode (Q4); The base stage of the 3rd NPN type triode (Q2) connects the negative pole of the 4th diode (D5), the positive ground of the 4th diode (D5), between the base stage that 9th resistance (R11) is connected to the 3rd NPN type triode (Q2) and collecting electrode, collecting electrode series connection the tenth resistance (R9) of the 3rd NPN type triode (Q2) connects the negative pole of the 3rd diode (D3) afterwards; The emitter of the 3rd NPN type triode (Q2), the emitter of PNP type triode (Q4) are all connected with the grid of N-channel MOS pipe (QX), the source grounding of the emitter of the second NPN type triode (Q3), the collecting electrode of PNP type triode (Q4), N-channel MOS pipe (QX); Electric power generation unloading resistance (RX) is connected with between commutating voltage input (Vin) and the drain electrode of N-channel MOS pipe (QX).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520652650.4U CN204895037U (en) | 2015-08-26 | 2015-08-26 | Vehicle air conditioner compressor protector circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520652650.4U CN204895037U (en) | 2015-08-26 | 2015-08-26 | Vehicle air conditioner compressor protector circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204895037U true CN204895037U (en) | 2015-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520652650.4U Expired - Fee Related CN204895037U (en) | 2015-08-26 | 2015-08-26 | Vehicle air conditioner compressor protector circuit |
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| Country | Link |
|---|---|
| CN (1) | CN204895037U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113980A (en) * | 2018-08-17 | 2019-01-01 | 珠海瑞景电子科技有限公司 | Idle reversal protection device circuit based on compressor |
| CN112248753A (en) * | 2020-10-21 | 2021-01-22 | 上海协格空调工程有限公司 | Stability regulating circuit of vehicle-mounted air conditioner |
-
2015
- 2015-08-26 CN CN201520652650.4U patent/CN204895037U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113980A (en) * | 2018-08-17 | 2019-01-01 | 珠海瑞景电子科技有限公司 | Idle reversal protection device circuit based on compressor |
| CN112248753A (en) * | 2020-10-21 | 2021-01-22 | 上海协格空调工程有限公司 | Stability regulating circuit of vehicle-mounted air conditioner |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20210826 |