CN103115182A - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
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- CN103115182A CN103115182A CN2011103642410A CN201110364241A CN103115182A CN 103115182 A CN103115182 A CN 103115182A CN 2011103642410 A CN2011103642410 A CN 2011103642410A CN 201110364241 A CN201110364241 A CN 201110364241A CN 103115182 A CN103115182 A CN 103115182A
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- expansion valve
- module
- signal
- electric expansion
- stepper motor
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Abstract
The invention provides an electronic expansion valve. The electronic expansion valve comprises a mechanical part and an electric control part, wherein the mechanical part comprises a stepping motor and a valve body, and the electric control part comprises a signal modulation and demodulation module, a signal handling module, a stepping motor driving module and a detecting module. The signal modulation and demodulation module demodulates mixed signals received from two conducting wires into a control signal and working pressure, the control signal is sent to the signal handling module, and the working pressure is provided to the signal handling module, the stepping motor driving module and the detecting module. A feedback signal of the signal handling module is modulated to a conducting wire. The signal handling module analyzes the control signal and sends a driving signal to the stepping motor driving module, state information of the stepping motor sent by the detecting module is received, and the state information is generated into the feedback signal. The stepping motor driving module drives the stepping motor to act according to the driving signal. The detecting module monitors the state information of the stepping motor in real time. The electronic expansion valve is few in conducting wires, convenient to install and control and easy to maintain.
Description
Technical field
The present invention relates to the automatic control technology field, particularly a kind of electric expansion valve.
Background technique
Electric expansion valve is comprised of stepper motor and valve body, the motion of stepper motor band moving valve.In prior art, the drive circuit of stepper motor is integrated on master control borad (ECU), and ECU is by transmitting control signal to the drive circuit of stepper motor, and the drive circuit Driving Stepping Motor of stepper motor turns round.
Referring to Fig. 1, this figure is the electric expansion valve schematic diagram on automobile of the prior art.
The drive circuit of stepper motor is positioned on ECU100, is directly controlled like this work of electric expansion valve 200 by ECU100, and general ECU100 needs at least four step motor control lines, five of some needs or six roots of sensation guide line.Specifically need several guide lines to be determined by the kind of stepper motor, but which kind of stepper motor no matter, and this control framework shown in Figure 1 all exists the guide line number many, the problem of circuit complexity.And common electric expansion valve has the line order of regulation, must connect as requested, and particularly the positive pole of power supply and negative pole can not wrongs.
In sum, this control framework wire harness more complicated of electric expansion valve in prior art is for installing and control is made troubles.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of electric expansion valve, controls wire harness less, and it is convenient to install and control.
The invention provides a kind of electric expansion valve, described electric expansion valve comprises: mechanical part and automatically controlled part, and mechanical part comprises stepper motor and valve body, described stepper motor connects described valve body;
Described electric control part is divided and is comprised: modulating and demodulating signal module, signal processing module, stepper motor driver module and testing module;
Described stepper motor driver module is connected with testing module and is connected described stepper motor;
Described modulating and demodulating signal module, be used for to be demodulated into control signal and operating voltage from the mixed signal that two wires receive, control signal is sent to signal processing module, and operating voltage is offered described signal processing module, stepper motor driver module and testing module; Also be used for the feedback signal of signal processing module is modulated to described wire;
Described signal processing module sends the driving signal to the stepper motor driver module for described control signal is carried out after analysing and processing, also is used for the status information of the stepper motor of reception testing module transmission, and described status information is generated feedback signal;
Described stepper motor driver module is used for according to described drive stepper motor action;
Described testing module is for the status information of Real Time Monitoring stepper motor.
Preferably, described electric expansion valve is controlled by external piloting control plate ECU, and described electric expansion valve is connected with master control borad ECU by described two wires.
Preferably, described two wires connect described ECU and electric expansion valve according to any order of connection.
Preferably, described signal processing module is used for also judge whether the ID of the electric expansion valve that the control signal of modulating and demodulating signal module transmission is carried is the ID of self, if so, receives this control signal and carries out analysing and processing; If not, directly abandon this control signal.
Preferably, whether the ID of the electric expansion valve that the control signal that described signal processing module also receives for judgement is carried is the ID of self, if so, carries out analysing and processing; If not, abandon this control signal.
Preferably, the status information of described stepper motor comprises position information and the fault message of stepper motor.
Preferably, described fault message comprises step-out information, excess temperature information and stall information.
Preferably, described ECU when be used for confirming that electric expansion valve has been completed the instruction of ECU and ECU and do not had new instruction to send to described electric expansion valve, cuts off the operating voltage of described electric expansion valve, and corresponding electric expansion valve is in the economize on electricity holding state.
Preferably, described stepper motor driver module and testing module integrate.
Preferably, described ECU after also being used for the feedback signal on wire is carried out demodulation, carries out analysing and processing.
Compared with prior art, the present invention has the following advantages:
Electric expansion valve provided by the invention, comprise: the modulating and demodulating signal module, be used for to be demodulated into control signal and operating voltage from the mixed signal that two wires receive, control signal is sent to signal processing module, and operating voltage is offered described signal processing module, stepper motor driver module and testing module; Also be used for the feedback signal of signal processing module is modulated to described wire; Signal processing module sends the driving signal to the stepper motor driver module for described control signal is carried out after analysing and processing, also is used for the status information of the stepper motor of reception testing module transmission, and described status information is generated feedback signal; The stepper motor driver module is used for according to described drive stepper motor action; Testing module is for the status information of Real Time Monitoring stepper motor.Electric expansion valve provided by the invention only just can be realized communicating by letter with ECU with two wires, what transmit on two wires is that control signal and operating voltage are modulated at together mixed signal, the number of conductors that has needed when having reduced like this control signal and operating voltage individual transmission.Because number of conductors is less, so installation and control ratio are more convenient, also be easy to safeguard.And these two wires do not have the order of connection of regulation, can connect according to any order of connection, because on these two wires with operating voltage together with control signal has been modulated at, be not that operating voltage is transmitted merely, need to distinguish both positive and negative polarity, so do not exist the both positive and negative polarity wiring to connect anti-situation.
Description of drawings
Fig. 1 is the electric expansion valve schematic diagram on automobile of the prior art;
Fig. 2 is electronic expansion valve structure figure provided by the invention;
Fig. 3 is the connection diagram of an electric expansion valve provided by the invention and master control borad;
Fig. 4 is the connection diagram of a plurality of electric expansion valve provided by the invention and master control borad.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Referring to Fig. 2, this figure is electronic expansion valve structure figure provided by the invention.
The electric expansion valve 2000 that the present embodiment provides comprises mechanical part and automatically controlled part, and mechanical part comprises stepper motor and valve body 2005, and described stepper motor connects described valve body; Described electric control part is divided and is comprised: modulating and demodulating signal module 2001, signal processing module 2002, stepper motor driver module 2003 and testing module 2004; Described stepper motor driver module 2003 is connected with testing module and is all connected described stepper motor;
Described modulating and demodulating signal module 2001, be used for to be demodulated into control signal and operating voltage from the mixed signal that two wires receive, control signal is sent to signal processing module 2002, and operating voltage is offered described signal processing module 2002, stepper motor driver module 2003 and testing module 2004; Also be used for the feedback signal of signal processing module 2002 is modulated to described wire;
Described two wires are according to any order of connection connecting electronic expansion valve.
Described signal processing module 2002, be used for described control signal is carried out sending the driving signal to stepper motor driver module 2003 after analysing and processing, also be used for the status information of the stepper motor of reception testing module 2004 transmissions, and described status information is generated feedback signal;
Described stepper motor driver module 2003 is used for according to described drive stepper motor action;
Described testing module 2004 is for the status information of Real Time Monitoring stepper motor.
Electric expansion valve provided by the invention only just can be realized communicating by letter with ECU with two wires, what transmit on two wires is that control signal and operating voltage are modulated at together mixed signal, the number of conductors that has needed when having reduced like this control signal and operating voltage individual transmission.Because number of conductors is less, so installation and control ratio are more convenient, also be easy to safeguard.And these two wires do not have the order of connection of regulation, can connect according to any order of connection, because on these two wires with operating voltage together with control signal has been modulated at, be not that operating voltage is transmitted merely, need to distinguish both positive and negative polarity, so do not exist the both positive and negative polarity wiring to connect anti-situation.
Need to prove, the status information of described stepper motor comprises position information and the fault message of stepper motor.
Described fault message comprises step-out information, excess temperature information and stall information.
Referring to Fig. 3, this figure is the connection diagram of an electric expansion valve provided by the invention and master control borad.
Modulating and demodulating signal module 2001 in the electric expansion valve 2000 that the embodiment of the present invention provides is connected with master control borad ECU1000 by described two wires.
ECU1000 sends to modulating and demodulating signal module 2001 by described two wires with the control signal that modulates and the mixed signal of operating voltage.
Be understandable that, ECU1000 also can be from the feedback signal that has modulated of the demodulation module processed of receiving signal on described two wires 2001 feedbacks, and the modulation /demodulation module of ECU1000 inside carries out feedback signal to carry out analysing and processing after demodulation.
In the present embodiment, ECU1000 and electric expansion valve 2000 only just can be realized controlling by two wires.And these two wires do not have the order of connection of regulation, can connect according to any order of connection, because on these two wires with operating voltage together with control signal has been modulated at, be not that operating voltage is transmitted merely, need to distinguish both positive and negative polarity, so do not exist the both positive and negative polarity wiring to connect anti-situation.Make like this installation and maintenance become more simple.
Referring to Fig. 4, this figure is the connection diagram of a plurality of electric expansion valve provided by the invention and master control borad.
As shown in Figure 4, be connected by two wires respectively between master control borad ECU1000 and each electric expansion valve (the first electric expansion valve 2000a, the second electric expansion valve 2000b, N electric expansion valve 2000c).
Need to prove, when ECU1000 controlled a plurality of electric expansion valve, the ID that each electric expansion valve need to the control signal from the mixed signal that two wires transmit carries judged whether it is the control signal of self.Particularly can for:
Signal processing module in electric expansion valve is used for also judge whether the ID of the electric expansion valve that the control signal of modulating and demodulating signal module transmission is carried is the ID of self, if so, receives this control signal and carries out analysing and processing; If not, directly abandon this control signal.
Perhaps,
Whether the ID of the electric expansion valve that the control signal that the described signal processing module in electric expansion valve also receives for judgement is carried is the ID of self, if so, carries out analysing and processing; If not, abandon this control signal.
Be connected by two wires between the ECU1000 that the present embodiment provides and each electric expansion valve, two wires are used for transmitting operating voltage and control signal and are modulated at together mixed signal, so both provided operating voltage for electric expansion valve, control signal is provided again, and only used two wires, reduced with respect to prior art the quantity that controls wire harness like this, owing to only having used two wires, so installation and control ratio are more convenient, also be easy to safeguard.And these two wires do not have the order of connection of regulation, can connect according to any order of connection, because on these two wires with operating voltage together with control signal has been modulated at, be not that operating voltage is transmitted merely, need to distinguish both positive and negative polarity, so do not exist the both positive and negative polarity wiring to connect anti-situation.
In another embodiment provided by the invention, described ECU, when be used for confirming that electric expansion valve has been completed the instruction of ECU and ECU and do not had new instruction to send to described electric expansion valve, cut off the operating voltage of described electric expansion valve, corresponding electric expansion valve is in the economize on electricity holding state.
Need to prove, described stepper motor driver module and testing module can integrate, and all are connected with stepper motor.
The above is only preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Although the present invention discloses as above with preferred embodiment, yet is not to limit the present invention.Any those of ordinary skill in the art, do not breaking away from technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement to make many possible changes and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention, all still belongs in the scope of technical solution of the present invention protection any simple modification made for any of the above embodiments, equivalent variations and modification according to technical spirit of the present invention.
Claims (10)
1. electric expansion valve, described electric expansion valve comprises: mechanical part and automatically controlled part, mechanical part comprises stepper motor and valve body, described stepper motor connects described valve body; It is characterized in that,
Described electric control part is divided and is comprised: modulating and demodulating signal module, signal processing module, stepper motor driver module and testing module;
Described stepper motor driver module is connected with testing module and is connected described stepper motor;
Described modulating and demodulating signal module, be used for to be demodulated into control signal and operating voltage from the mixed signal that two wires receive, control signal is sent to signal processing module, and operating voltage is offered described signal processing module, stepper motor driver module and testing module; Also be used for the feedback signal of signal processing module is modulated to described wire;
Described signal processing module sends the driving signal to the stepper motor driver module for described control signal is carried out after analysing and processing, also is used for the status information of the stepper motor of reception testing module transmission, and described status information is generated feedback signal;
Described stepper motor driver module is used for according to described drive stepper motor action;
Described testing module is for the status information of Real Time Monitoring stepper motor.
2. electric expansion valve according to claim 1, is characterized in that, described electric expansion valve is controlled by external piloting control plate ECU, and described electric expansion valve is connected with master control borad ECU by described two wires.
3. multinode control system according to claim 2, is characterized in that, described two wires connect described ECU and electric expansion valve according to any order of connection.
4. according to claim 1-3 described electric expansion valves of any one, it is characterized in that, described signal processing module is used for also judge whether the ID of the electric expansion valve that the control signal of modulating and demodulating signal module transmission is carried is the ID of self, if so, receive this control signal and carry out analysing and processing; If not, directly abandon this control signal.
5. according to claim 1-3 described resistance expansion valves of any one, is characterized in that, whether the ID of the electric expansion valve that the control signal that described signal processing module also receives for judgement is carried is the ID of self, if so, carries out analysing and processing; If not, abandon this control signal.
6. according to claim 4 or 5 described electric expansion valves, is characterized in that, the status information of described stepper motor comprises position information and the fault message of stepper motor.
7. electric expansion valve according to claim 6, is characterized in that, described fault message comprises step-out information, excess temperature information and stall information.
8. electric expansion valve according to claim 2, it is characterized in that, described ECU, when be used for confirming that electric expansion valve has been completed the instruction of ECU and ECU and do not had new instruction to send to described electric expansion valve, cut off the operating voltage of described electric expansion valve, corresponding electric expansion valve is in the economize on electricity holding state.
9. electric expansion valve according to claim 1, is characterized in that, described stepper motor driver module and testing module integrate.
10. electric expansion valve according to claim 2, is characterized in that, described ECU after also being used for the feedback signal on wire is carried out demodulation, carries out analysing and processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103642410A CN103115182A (en) | 2011-11-16 | 2011-11-16 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103642410A CN103115182A (en) | 2011-11-16 | 2011-11-16 | Electronic expansion valve |
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| CN103115182A true CN103115182A (en) | 2013-05-22 |
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| CN2011103642410A Pending CN103115182A (en) | 2011-11-16 | 2011-11-16 | Electronic expansion valve |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015043519A1 (en) * | 2013-09-28 | 2015-04-02 | 杭州三花研究院有限公司 | Refrigerant circulation system |
| WO2015043416A1 (en) * | 2013-09-28 | 2015-04-02 | 杭州三花研究院有限公司 | Air conditioning system and method for controlling same |
| CN104864152A (en) * | 2015-05-27 | 2015-08-26 | 成都德麦科技有限公司 | Electronic expansion valve control system |
| CN108626919A (en) * | 2017-03-15 | 2018-10-09 | 杭州三花研究院有限公司 | The control method and air-conditioner control system of electric expansion valve |
| CN108955005A (en) * | 2017-05-24 | 2018-12-07 | 杭州三花研究院有限公司 | control system and control method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015043519A1 (en) * | 2013-09-28 | 2015-04-02 | 杭州三花研究院有限公司 | Refrigerant circulation system |
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| CN104864152A (en) * | 2015-05-27 | 2015-08-26 | 成都德麦科技有限公司 | Electronic expansion valve control system |
| CN108626919A (en) * | 2017-03-15 | 2018-10-09 | 杭州三花研究院有限公司 | The control method and air-conditioner control system of electric expansion valve |
| CN108955005A (en) * | 2017-05-24 | 2018-12-07 | 杭州三花研究院有限公司 | control system and control method |
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Application publication date: 20130522 |