CN102374328A - Electronic expansion valve, stepper motor and reversing valve - Google Patents
Electronic expansion valve, stepper motor and reversing valve Download PDFInfo
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- CN102374328A CN102374328A CN2010102642067A CN201010264206A CN102374328A CN 102374328 A CN102374328 A CN 102374328A CN 2010102642067 A CN2010102642067 A CN 2010102642067A CN 201010264206 A CN201010264206 A CN 201010264206A CN 102374328 A CN102374328 A CN 102374328A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
- G05B19/40—Open loop systems, e.g. using stepping motor
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Abstract
The invention discloses an electronic expansion valve, which comprises an electrical control part and a mechanical part. The electrical control part comprises a bus signal reception/transmission module, a central processing module and a stepper motor driving module; wherein the bus signal reception/transmission module is used for receiving a bus control signal and transmitting the bus control signal to the central processing module; the central processing module is used for extracting valve opening information included in the bus control signal, generating a corresponding pulse control signal in combination with current position information of a stepper motor read from a data storage module, and outputting the pulse control signal to the stepper motor driving module; and the stepper motor driving module is used for driving the stepper motor to adjust the valve opening according to the pulse control signal. The invention also discloses a stepper motor and a reversing valve. The number of drive wires directly connected with a main control board can be reduced, the structure of the main control board can be simplified, and the manufacturing cost can be saved.
Description
Technical field
The present invention relates to the electronic expansion valve technology field, particularly relate to a kind of electric expansion valve, stepper motor and selector valve.
Background technique
In the family expenses field of air conditioning, generally adopt the step motor type electric expansion valve.Said electric expansion valve generally includes stepper motor and valve body, the aperture of the rotation control valve body through stepper motor.In the existing electric expansion valve, the drive circuit of said stepper motor generally is integrated on the master control borad, links to each other with stepper motor through drive wire.When master control borad need drive electric expansion valve, issue corresponding pulse control signal to drive circuit, and then the drive stepping motor rotation, make valve body reach corresponding aperture.
Current in car air conditioner; That generally use is heating power expansion valve (TXV); TXV is by the pressure and temp of bulb or air tank head sensing evaporator outlet refrigeration agent; And come the regulation valve body aperture through this air tank head and driving mechanism with special thermodynamic property, thus control gets into the refrigerant flow of vaporizer, thereby do not have the electronic circuit of sensing, control between air-conditioning master board and the heating power expansion valve.The control characteristic of this heating power expansion valve is by mechanical structure and the thermodynamic property decision of self, and the dynamic characteristic of each product is all fixed, thereby heating power expansion valve can not adjust out valve performance according to the parameter difference of different air-conditioning systems, and versatility is relatively poor.And the employing electric expansion valve can design the different valve characteristics of opening according to different air-conditioning system characteristics, and the applicability of product is wider.
Given this; Those skilled in the art consider the electric expansion valve in domestic air conditioning field is applied on the car air conditioner; Because the stepper motor driving circuit of existing electric expansion valve need be integrated in the master board, thereby need in the master board of automobile, increase extra drive wire and remove to drive electric expansion valve.The master board of considering automobile needs a plurality of sensors such as photoreceptor on controll day while, humidity transducer and temperature transducer; And control compressor, a plurality of blower fans etc. simultaneously; In limited space, increase extra drive wire again and realize that master board is connected with the direct of electric expansion valve, can make that the drive wire of drawing from master board is very many; The structure of master board is very complicated, increases manufacture cost.
In view of this, how electric expansion valve of the prior art is improved, reduce and the direct-connected number of drive lines of master board, thereby the structure of simplification master board is the problem that art technology is needed solution badly.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of electric expansion valve, stepper motor and selector valve, can reduce and the direct-connected number of drive lines of master board, thereby the structure of simplification master board is saved manufacture cost.
The present invention provides a kind of electric expansion valve, comprises automatically controlled part and mechanical part; Said mechanical part comprises stepper motor and valve body; Said electric control part branch comprises bus signals reception/transmitting module, central processing module, data memory module, step motor drive module;
Said bus signals reception/transmitting module is used to receive bus control signal and is sent to central processing module;
Said central processing module is used to extract the valve body opening information that comprises in the said bus control signal; Current location information in conjunction with the stepper motor that from said data memory module, reads; Generate corresponding pulse control signal, export the step motor drive module to;
Said data memory module is used to store the current location information of stepper motor;
Said step motor drive module is used for driving the aperture that said stepper motor is adjusted said valve body according to said pulse control signal.
Preferably, said central processing module comprises:
Signal extraction unit is used for extracting the valve body opening information that the bus control signal that receives comprises, the aperture of the valve body that obtains expecting.
Signal conversion unit is used for the aperture of the valve body of said expectation is converted into the desired locations information of stepper motor;
The rotation angle computing unit is used for the desired locations information according to said stepper motor, in conjunction with the position information of the current stepper motor that from data memory module, reads, calculates stepper motor and turns to the angle that said desired locations need rotate from current location;
The pulse generation unit is used for generating corresponding pulse control signal according to the angle that the stepper motor needs rotate, and is sent to the step motor drive module.
Preferably, said automatically controlled part also comprises the stepper motor monitoring modular, and whether the induction electromotive force that is used to monitor on the stepper motor coil takes place unusually, if send abnormal signal to said central processing module.
Preferably, said central processing module calculates the current location information of said stepper motor according to the induction electromotive force abnormal signal that receives, and is stored in the said data memory module.
Preferably, said central processing module also comprises the step-out judging unit, be used to receive said abnormal signal after, confirm said stepper motor generation step-out phenomenon, send of-step signal to said data memory module.
Preferably, said central processing module can also comprise the step-out compensating unit, is used for the said of-step signal according to said data memory module storage, and said stepper motor is carried out the step-out compensation.
Preferably, said automatically controlled part also comprises temperature detecting module, is used to detect the operating temperature of the valve body of said electric expansion valve, and with detected temperature feedback to central processing module.
Preferably, said central processing module also comprises the temperature judging unit, when being used to receive said detected temperatures, judges whether said detected temperatures is in normal temperature range, if said detected temperatures is converted into bus signals is back to master controller; If not, send control signal corresponding to stepper motor driving circuit, the control step motor turns to valve body and is in safe aperture, and the information that said detected temperatures and said valve body have been in safe aperture is converted into bus signals is back to master controller.
Preferably; Said central processing module also comprises the automatic homing unit; When being used in the Preset Time section, not receiving the monitoring signal of autonomous controller, send control signal corresponding to stepper motor driving circuit, the control step motor turns to valve body and is in safe aperture.
Preferably, said electric expansion valve adopts unipolarity step motor drive mode or bipolar stepping motor driving mode.
The present invention also provides a kind of stepper motor, is used for electric expansion valve, comprises coil winding and rotor, also comprises circuit board; Said circuit board comprises bus signals reception/transmitting module, central processing module, data memory module;
Said bus signals reception/transmitting module is used to receive bus control signal and is sent to said central processing module;
Said central processing module is used to extract the valve body opening information that comprises in the said bus control signal, in conjunction with the current location information of the stepper motor that from data memory module, reads, generates corresponding pulse control signal, exports said coil winding to;
Said data memory module is used to store the current location information of stepper motor.
Preferably, said circuit board also comprises the stepper motor monitoring modular, and whether the induction electromotive force that is used to monitor on the coil winding of stepper motor takes place unusually, if send abnormal signal to said central processing module.
Preferably, said central processing module also comprises the step-out judging unit, be used to receive said abnormal signal after, confirm said stepper motor generation step-out phenomenon, send of-step signal to said data memory module.
Preferably, said central processing module can also comprise the step-out compensating unit, is used for the said of-step signal according to said data memory module storage, and said stepper motor is carried out the step-out compensation.
Preferably, said circuit board also comprises temperature detecting module, is used to detect the operating temperature of said stepper motor, and with detected temperature feedback to central processing module.
Preferably, said central processing module also comprises the automatic homing unit, when being used in the Preset Time section, not receiving the monitoring signal of autonomous controller, sends control signal corresponding to said coil winding, and the control step motor turns to safe aperture.
The present invention also provides a kind of selector valve, comprises automatically controlled part and mechanical part; Said mechanical part comprises stepper motor and valve body; Said electric control part branch comprises bus signals reception/transmitting module, central processing module, data memory module, step motor drive module;
Said bus signals reception/transmitting module is used to receive bus control signal and is sent to central processing module;
Said central processing module is used to extract the valve body opening information that comprises in the said bus control signal, in conjunction with the current location information of the stepper motor that from data memory module, reads, generates corresponding pulse control signal, exports the step motor drive module to;
Said data memory module is used to store the current location information of stepper motor;
Said step motor drive module is used for driving the aperture that said stepper motor is adjusted said valve body according to said pulse control signal.
According to specific embodiment provided by the invention, the invention discloses following technique effect:
Adopt the embodiment of the invention, can directly link to each other with master controller, receive the bus control signal that master controller issues through bus.Thereby realized that master controller can satisfy the working environment of total line traffic control through control bus to electronic Expansion Valve Control.And then do not need again on master controller, to increase extra drive wire and realize being connected of master controller and electric expansion valve, reduce and the direct-connected number of drive lines of master board, thereby simplify the structure of master board, the saving manufacture cost.
Description of drawings
Fig. 1, the electric expansion valve structural drawing that provides for the embodiment of the invention one;
Fig. 2, the electric expansion valve fundamental diagram that provides for the embodiment of the invention one;
Fig. 3, the central processing module structural drawing that provides for the embodiment of the invention one;
Fig. 4, the electric expansion valve structural drawing that provides for the embodiment of the invention two.
Embodiment
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, below in conjunction with accompanying drawing and embodiment the present invention done further detailed explanation.
In view of this, the object of the present invention is to provide a kind of electric expansion valve, stepper motor and selector valve, can reduce and the direct-connected number of drive lines of master board, thereby the structure of simplification master board is saved manufacture cost.
In vehicle electric field, generally adopt the automobile bus technology.The automobile bus technology is meant that the automotive interior lead adopts a kind of technology of total line traffic control.Concrete; Be meant through certain communications protocol; Like high-speed bus CAN (controller area network, Controller Area Network) or low speed bus LIN (Local Interconnect Network), with each ECU (electronic control unit of automotive interior; Electronic Control Unit) node connection gets up, thereby forms the LAN of an automotive interior.Each ECU node is accomplished expectant control function and action according to the control information that is received from bus.
The described electric expansion valve of the embodiment of the invention can directly link to each other with master controller through bus, receives the bus control signal that master controller issues.Thereby realized that master controller can satisfy the working environment of total line traffic control through control bus to electronic Expansion Valve Control.And then do not need again on master controller, to increase extra drive wire and realize being connected of master controller and electric expansion valve, reduce and the direct-connected number of drive lines of master board, thereby simplify the structure of master board, the saving manufacture cost.
See figures.1.and.2, be respectively electric expansion valve structural drawing and fundamental diagram that the embodiment of the invention one provides.Said electric expansion valve 1 comprises: automatically controlled part 10 and mechanical part 20.Wherein, said mechanical part 20 comprises stepper motor 21 and valve body 22.Said automatically controlled part 10 comprises: bus signals reception/transmitting module 11, central processing module 12, step motor drive module 13 and data memory module 15.
Said bus signals reception/transmitting module 11 links to each other with the EBI of master controller 2; Be used to receive the bus control signal of autonomous controller 2 and be sent to central processing module 12, the bus signals that is received from central processing module 12 is back to master controller 2.
As shown in Figure 2, said electric expansion valve 1 through bus realize with master controller 2 be connected the bus control signal that reception master controller 2 issues.Said bus control signal is based on the bus communication agreement; Said bus can be CAN bus or LIN bus, also can be other control buss such as TTP, J1850, MOST and IDB.
Need to prove; Said bus signals reception/transmitting module 11 can be discerned control signals transmitted on the bus; When the recipient of acknowledgement control signal is electric expansion valve 1; Bus signals reception/transmitting module 11 receives this control signal, and this control signal is forwarded to central processing module 12.
Concrete, said bus control signal is that master controller 2 issues, and is used to control the signal of aperture of the valve body 22 of electric expansion valve 1, wherein should include the address information and the valve body opening information of this electric expansion valve 1.Said bus signals reception/transmitting module 11 confirms according to the address information in the said bus control signal whether the recipient of this control signal is electric expansion valve 1.
Said central processing module 12 is used to extract the valve body opening information that comprises in the said bus control signal; In conjunction with the current stepper motor position information that from said data memory module 15, reads; Generate corresponding pulse control signal, export step motor drive module 13 to.
Concrete; Said central processing module 12 extracts said valve body opening information from bus control signal after, the valve body aperture that obtains expecting converts the desired locations that stepper motor need turn to; The current location information of the stepper motor that combines again from data memory module 15, to read; Calculate stepper motor and turn to the angle that said desired locations need rotate, generate corresponding pulse control signal in view of the above, be sent to step motor drive module 13 from current location.
Said data memory module 15 is used to store the current location information of stepper motor 21.
Said step motor drive module 13 is used for driving said stepper motor 21 according to said pulse control signal rotates, and then adjusts the aperture of said valve body 22, control electric expansion valve 1 proper functioning.
The said electric expansion valve 1 of the embodiment of the invention; Through realizing linking to each other with the control bus of master controller 2 at bus signals reception/transmitting module 11; Receive the bus control signal that master controller 2 issues; Extract the valve body opening information that comprises in the said bus control signal through central processing module 12, be converted into pulse control signal, by the aperture of step motor drive module 13 drive stepping motor 21 adjustment valve bodies 22.Thereby realized that master controller 2 can make electric expansion valve 1 according to the invention can satisfy the working environment of total line traffic control through the control of control bus to electric expansion valve 1.
Concrete, with reference to Fig. 3, the central processing module structural drawing that provides for the embodiment of the invention one.As shown in Figure 3, said central processing module 12 can comprise: signal extraction unit 121, signal conversion unit 122, rotation angle computing unit 123, pulse generation unit 124.
Concrete, the said valve body opening information that comprises in the said bus control signal is the aperture that is used to show that the valve body 22 of master controller 2 expectation electric expansion valves 1 reaches.
Working principle according to electric expansion valve 1 can know that the aperture of its valve body 22 is to control through the rotation of stepper motor 21, and for the electric expansion valve of confirming 1, the corresponding relation between the rotation angle of the aperture of its valve body 22 and stepper motor 21 is confirmed.Therefore, can obtain the desired locations information of stepper motor 21 easily according to the aperture of valve body 22.
Simultaneously, for stepper motor 21, also be to have certain corresponding relation between the angle of its rotation and the step number.That is to say that stepper motor 21 revolutions move a step, its corresponding angle is confirmed.Therefore, in the embodiment of the invention, said central processing module 12 also can convert the aperture of the valve body of expecting 22 into step number that stepper motor 21 need turn to.
Rotation angle computing unit 123; Be used for desired locations information according to said stepper motor 21; In conjunction with the position information of the current stepper motor 21 that from data memory module 15, reads, calculate stepper motor 21 and turn to the angle that said desired locations need rotate from current location.
Preferably, said automatically controlled part 10 also comprises: stepper motor monitoring modular 14, whether the induction electromotive force that is used to monitor on stepper motor 21 coils takes place unusually, if send abnormal signal to said central processing module 12.
Corresponding, said central processing module 12 can calculate said stepper motor 21 current position information according to the induction electromotive force abnormal signal from stepper motor monitoring modular 14 that receives, and is stored in the said data memory module 15.
Need to prove, not only comprise the current location information of stepper motor in the said data memory module 15, also comprise the desired locations information of stepper motor, when the amounts of rotation of needs last time and ought last time actual amounts of rotation.
Wherein, said desired locations information is that said signal conversion unit 122 is converted to according to the aperture of the valve body 22 of the said expectation that comprises in the said bus control signal.
The said amounts of rotation that ought be last time needs is the stepper motor 21 that rotation angle computing unit 123 calculates and turns to the angle that said desired locations need rotate from current location.
The said last time amounts of rotation of reality is the last time angle of actual rotation of stepper motor 21; Can be after stepper motor 21 be accomplished this time rotation, according to the amounts of rotation of said last time needs, in conjunction with calculating of unusual induction electromotive force taken place.
The current location of said stepper motor can according to said stepper motor before ought last time rotating the position and ought calculate by last time actual amounts of rotation.
Concrete, for ought last time rotating of stepper motor, before rotating beginning, can obtain the current location of stepper motor through data memory module 15, this current location is the position before stepper motor ought last time rotate; Accomplish after last time rotating at stepper motor, combine stepper motor last time the amounts of rotation of reality can calculate the current location of stepper motor, this current location is meant the position of stepper motor after last time rotating completion.
Need to prove that when stepper motor 21 did not rotate by drive signal (being pulse control signal), the induction electromotive force on a certain coil of corresponding stepper motor 21 can occur unusually.Can judge thus to obtain not normal rotation of this stepper motor 21, the step-out phenomenon has taken place.
The step-out phenomenon that stepper motor 21 is taken place adds up, and obtains the step-out aggregate-value; According to said step-out aggregate-value, combine the step number that ought last time need rotate again, can obtain the last time step number of actual rotation of stepper motor 21; Combine stepper motor 21 to rotate the relation of step numbers and angular displacement again, calculate the angle of stepper motor 21 actual rotation, be kept in the data memory module 15.
Further; Said central processing module 12 also comprises: the step-out judging unit; After being used to receive the abnormal signal of said stepper motor monitoring modular 14 transmissions, confirm that the step-out phenomenons take place this stepper motor 21, send of-step signal to said data memory module 15.
When said step-out judging unit receives the induction electromotive force generation anomalous signals on stepper motor 21 coils, can judge to obtain not normal rotation of this stepper motor 21, the step-out phenomenon has taken place.
Corresponding, said central processing module 12 can also comprise: the step-out compensating unit, be used for said of-step signal according to said data memory module 15 storages, and said stepper motor 21 is carried out the step-out compensation.
Said step-out compensation is specially: the of-step signal to said data memory module 15 storages, resend each time step-out corresponding pulse control signal, and drive said stepper motor 21 and rotate.Because taking place, the step-out phenomenon is said stepper motor 21 by this subpulse control signal driving rotation; Therefore; When this time step-out is compensated, only need said stepper motor 21 is resend this subpulse control signal, drive said stepper motor 21 rotations and get final product.
Concrete, said step-out compensating unit can be realized through dual mode the step-out compensation of said stepper motor 21.Respectively two kinds of compensation ways are set forth below.
First kind of compensation way: after said step-out compensating unit is used for said data memory module 15 1 and receives said of-step signal, immediately stepper motor 21 is carried out the step-out compensation.That is to say; As long as data memory module 15 receives an of-step signal; Said step-out compensating unit just compensates this time step-out to this of-step signal at once, resends this time step-out corresponding pulse control signal, drives said stepper motor 21 and rotates.
Second kind of compensation way: said step-out compensating unit adds up the of-step signal that said data memory module 15 receives; Accomplish after last time rotating at stepper motor 21; Last time the angle and the said angle that ought last time need rotate of actual rotation compared with stepper motor 21; Calculate the angle that needs compensation, generate corresponding pulse control signal, be sent to step motor drive module 13 drive stepping motor 21 and rotate.
Wherein, said stepper motor 21 last time the angle of actual rotation can be directly calculate according to the aggregate-value of of-step signal.Concrete, the of-step signal that receives is added up, obtain the aggregate-value of of-step signal; The angle corresponding pulse control signal that the aggregate-value and the stepper motor 21 of said of-step signal ought last time need be rotated compares; Can obtain the pulse signal value of actual drive stepping motor 21 normal rotation; Utilize the principle of stepper motor 21, can transform the angle that obtains stepper motor 21 actual rotation.
Certainly; The of-step signal that said step-out compensating unit also can directly receive said data memory module 15 adds up; After stepper motor 21 was accomplished rotation, the aggregate-value with the of-step signal that adds up to obtain was converted into the angle that needs compensation; Generate corresponding pulse control signal, be sent to step motor drive module 13 drive stepping motor 21 and rotate.
Preferably; Said central processing module 12 can also comprise the compensation tests unit, is used for after compensation is accomplished, when receiving the of-step signal of step-out judging unit transmission once more; Confirm that step-out has taken place this stepper motor 21 once more in compensation process, need once more it to be compensated.
Further; Said compensation tests unit further preestablishes maximum compensation number of times; When compensation has exceeded said maximum compensation number of times to the step-out of this stepper motor 21; Stop compensation, generate error signal simultaneously, be sent to master controller 2 through bus signals reception/transmitting module 11 based on the bus communication agreement.
Through said step-out judging unit and step-out compensating unit, the error that can solve valve body 22 apertures that electric expansion valve 1 causes because of step-out in the course of the work is bigger than normal, produce wrong problem even.
With reference to Fig. 4, the electric expansion valve structural drawing that provides for the embodiment of the invention two.Can know that like Fig. 4 electric expansion valve that the embodiment of the invention two provides and embodiment's one difference is: the automatically controlled part 1 of said electric expansion valve 1 also comprises: temperature detecting module 16.
Said temperature detecting module 16 is used to detect the operating temperature of the valve body 22 of said electric expansion valve 1, and with detected temperature feedback to central processing module 12.
Corresponding, said central processing module 12 also comprises the temperature judging unit, when being used to receive said detected temperatures, judges whether said detected temperatures is in normal temperature range, if said detected temperatures is converted into bus signals is back to master controller 2; If not; Send control signal corresponding to stepper motor driving circuit 13; Control step motor 21 turns to valve body 22 and is in safe aperture, and the information that said detected temperatures and said valve body have been in safe aperture is converted into bus signals is back to master controller 2.
Concrete; Said transmission control signal corresponding to stepper motor driving circuit 13 is specially: convert the safe aperture of preset valve body 22 to security standpoint that stepper motor 21 rotates; The position information of the current stepper motor that combines again from data memory module 15, to read; Calculate stepper motor 21 and turn to the angle that said security standpoint need rotate, generate corresponding pulse control signal in view of the above, be sent to step motor drive module 13 from current location.
Preferably, said central processing module 12 can also comprise: the automatic homing unit.
Can recognize mutually constantly that in order to make master controller 2 and electric expansion valve 1 whether the other side's working state is normal, communicates through monitoring signal between master controller 2 and the electric expansion valve 1 constantly.In a period of time, do not receive the monitoring signal of autonomous controller 2 when electric expansion valve 1; Can judge tentatively that master controller 2 work occur unusual; This moment, said step motor drive module 13 can be realized controlling automatically in the automatic homing unit of said central processing module 12; Drive stepping motor 21 turns to home, and then makes the valve body 22 of electric expansion valve 1 be in safe aperture.
Concrete, when said automatic homing unit is used in the Preset Time section, not receiving the monitoring signal of autonomous controller 2, sending control signal corresponding to stepper motor driving circuit 13, control step motor 21 turns to valve body 22 and is in safe aperture.
Concrete; Said transmission control signal corresponding to stepper motor driving circuit 13 is specially: convert the safe aperture of preset valve body 22 to security standpoint that stepper motor 21 rotates; The current location information of the stepper motor that combines again from data memory module 15, to read; Calculate stepper motor 21 and turn to the angle that said security standpoint need rotate, generate corresponding pulse control signal in view of the above, be sent to step motor drive module 13 from current location.
The described electric expansion valve 1 of the embodiment of the invention can adopt unipolarity step motor drive mode, also can adopt the bipolar stepping motor driving mode.Its difference only is, when adopting unipolarity step motor drive mode, between said stepper motor 21 and the stepper motor driving circuit 13 employing four mutually six line systems connect method; When adopting the bipolar stepping motor driving mode, adopt two-phase four-wire system to connect method between said stepper motor 21 and the stepper motor driving circuit 13.
For unipolarity step motor drive mode; Adopt the bipolar stepping motor driving mode, under the identical situation in coil copper cash line footpath, have more powerful driving force; And it is more steady that motor rotates, and greatly reduces the reject ratio of the electric expansion valve that causes because of driving force and vibration problem.Therefore, the said electric expansion valve 1 preferred bipolar stepping motor driving mode that adopts of the embodiment of the invention.
Preferably, in the embodiment of the invention, can adopt the segmentation function, realize segmentation control stepper motor to the driving of said stepper motor.Concrete, said segmentation control is to realize through the electric current in the exciting winding of stepper motor is controlled.
Through stepper motor being adopted the segmentation function, help the monitoring of the induction electromotive force of 14 pairs of stepper motors of said stepper motor monitoring modular.
The embodiment of the invention also provides a kind of stepper motor, is used to control electric expansion valve, and said stepper motor comprises coil winding and rotor, can also comprise circuit board.Said circuit board comprises: bus signals reception/transmitting module, central processing module and data memory module.
Said bus signals reception/transmitting module links to each other with the EBI of master controller, is used to receive the bus control signal of autonomous controller and be sent to central processing module, and the bus signals that is received from central processing module is back to master controller.
Said central processing module is used to extract the valve body opening information that comprises in the said bus control signal; In conjunction with the current stepper motor position information that from said data memory module, reads; Generate corresponding pulse control signal, export coil winding to said stepper motor.
Said data memory module is used to store the current location information of stepper motor.
The said stepper motor of the embodiment of the invention; Through realizing linking to each other with the control bus of master controller at bus signals reception/transmitting module; Receive the bus control signal that master controller issues; Extract the valve body opening information that comprises in the said bus control signal through central processing module, be converted into pulse control signal, be sent to the driver module drive stepping motor of stepper motor.Thereby realized that master controller can make stepper motor according to the invention can satisfy the working environment of total line traffic control through control bus to Stepping Motor Control.
Concrete, said central processing module can comprise: signal extraction unit, signal conversion unit, rotation angle computing unit, pulse generation unit.
Signal extraction unit is used for extracting the valve body opening information that the bus control signal that receives comprises, the aperture of the valve body that obtains expecting.
Signal conversion unit is used for converting the aperture of the valve body of said expectation into angle that stepper motor need turn to, is the desired locations information of stepper motor.
The rotation angle computing unit is used for the desired locations information according to said stepper motor, in conjunction with the position information of the current stepper motor that from data memory module, reads, calculates stepper motor and turns to the angle that said desired locations need rotate from current location.
The pulse generation unit is used for generating corresponding pulse control signal according to the angle that the stepper motor needs rotate, and is sent to the coil winding of said stepper motor.
Preferably, said circuit board also comprises: the stepper motor monitoring modular, whether the induction electromotive force that is used to monitor on the coil winding of stepper motor takes place unusually, if send abnormal signal to said central processing module.
Corresponding, said central processing module can calculate said stepper motor current position information according to the induction electromotive force abnormal signal from the stepper motor monitoring modular that receives, and is stored in the said data memory module.
Need to prove, not only comprise the current location information of stepper motor in the said data memory module, also comprise the desired locations information of stepper motor, when the amounts of rotation of needs last time and ought last time actual amounts of rotation.
Further, said central processing module also comprises: the step-out judging unit, after being used to receive the abnormal signal of said stepper motor monitoring modular transmission, confirm this stepper motor generation step-out phenomenon, and send of-step signal to said data memory module.
Corresponding, said central processing module can also comprise: the step-out compensating unit, be used for said of-step signal according to said data memory module storage, and said stepper motor is carried out the step-out compensation.
Preferably; Said central processing module can also comprise the compensation tests unit, is used for after compensation is accomplished, when receiving the of-step signal of step-out judging unit transmission once more; Confirm that step-out has taken place this stepper motor once more in compensation process, need once more it to be compensated.
Further; Said compensation tests unit further preestablishes maximum compensation number of times; When compensation has exceeded said maximum compensation number of times to the step-out of this stepper motor; Stop compensation, generate error signal simultaneously, be sent to master controller through bus signals reception/transmitting module based on the bus communication agreement.
Preferably, said circuit board also comprises temperature detecting module, is used to detect the operating temperature of valve body of the electric expansion valve of said step motor control, and with detected temperature feedback to central processing module.
Corresponding, said central processing module also comprises the temperature judging unit, when being used to receive said detected temperatures, judges whether said detected temperatures is in normal temperature range, if said detected temperatures is converted into bus signals is back to master controller; If not; Send control signal corresponding to stepper motor driving circuit; The valve body that the control step motor turns to electric expansion valve is in safe aperture, and the information that said detected temperatures and said valve body have been in safe aperture is converted into bus signals is back to master controller.
Preferably; Said central processing module can also comprise the automatic homing unit; When being used in the Preset Time section, not receiving the monitoring signal of autonomous controller; Send control signal corresponding to stepper motor driving circuit, the valve body that the control step motor turns to electric expansion valve is in safe aperture.
Need to prove that the application area of the embodiment of the invention not only is confined to electric expansion valve, for also standing good through other valves that are usually used in refrigerating field, for example four-way change-over valve and switching valve.Be that example is carried out simple declaration with four-way change-over valve and switching valve below.
Car air conditioner generally only has refrigerating function at present, but the heat pump air conditioner that has refrigeration, heat-production functions concurrently is the developing direction of following car air conditioner.And four-way change-over valve is parts necessary on the heat pump air conditioner, is used for changing the flow direction of air-conditioning system refrigerant gas, and with the function of change heat exchanger (vaporizer and condenser), thereby the realization air-conditioning has refrigeration concurrently and heats.
Based on this, the embodiment of the invention also provides a kind of four-way change-over valve, and said four-way change-over valve comprises: automatically controlled part and mechanical part.Wherein, said mechanical part comprises stepper motor and valve body.Said electric control part branch comprises: bus signals reception/transmitting module, central processing module, step motor drive module and data memory module.
Said bus signals reception/transmitting module links to each other with the EBI of master controller, is used to receive the bus control signal of autonomous controller and be sent to central processing module, and the bus signals that is received from central processing module is back to master controller.
Said central processing module is used to extract the valve body opening information that comprises in the said bus control signal, and the current stepper motor position information in conjunction with from said data memory module, reading generates corresponding pulse control signal, exports the step motor drive module to.
Said data memory module is used to store the current location information of stepper motor.
Said step motor drive module is used for driving said stepper motor according to said pulse control signal rotates, and then adjusts the aperture of said valve body, control four-way change-over valve proper functioning.
The electric control part of the electric expansion valve that provides in the automatically controlled part of the four-way change-over valve that the embodiment of the invention provides and the previous embodiment is divided identical, repeats no more at this.
The said four-way change-over valve of the embodiment of the invention; Through realizing linking to each other with the control bus of master controller at bus signals reception/transmitting module; Receive the bus control signal that master controller issues; Extract the valve body opening information that comprises in the said bus control signal through central processing module, be converted into pulse control signal, by the aperture of step motor drive module drive stepper motor adjustment valve body.Thereby realized that master controller can make four-way change-over valve according to the invention can satisfy the working environment of total line traffic control through the control of control bus to four-way change-over valve.
Switching valve also is a kind of of selector valve, generally is appreciated that the valve into " an import multiple exit ", is used to control import and connects with the switching of different outlets.Specifically, for switching valve, can rotate through the control step motor, realize that the said import of control communicates, perhaps controls the delivery volume that same outlet is given in said import with different outlets.
When said common selector valve is used for refrigerating field, communicate with different outlets through controlling said import, can realize different refrigeration units is satisfied different refrigeration demand with connecing different refrigeration units after the different outlets; Give the delivery volume of same outlet through controlling said import, can realize, play the effect of control refrigerating capacity for same refrigeration unit.
Based on this, the embodiment of the invention also provides a kind of switching valve, and said switching valve comprises: automatically controlled part and mechanical part.Wherein, said mechanical part comprises stepper motor and valve body.Said electric control part branch comprises: bus signals reception/transmitting module, central processing module, step motor drive module and data memory module.
Said bus signals reception/transmitting module links to each other with the EBI of master controller, is used to receive the bus control signal of autonomous controller and be sent to central processing module, and the bus signals that is received from central processing module is back to master controller.
Said central processing module is used to extract the valve body opening information that comprises in the said bus control signal, and the current stepper motor position information in conjunction with from said data memory module, reading generates corresponding pulse control signal, exports the step motor drive module to.
Said data memory module is used to store the current location information of stepper motor.
Said step motor drive module is used for driving said stepper motor according to said pulse control signal rotates, and then adjusts the aperture of said valve body, control switching valve proper functioning.
The electric control part of the electric expansion valve that provides in the automatically controlled part of the switching valve that the embodiment of the invention provides and the previous embodiment is divided identical, repeats no more at this.
The said switching valve of the embodiment of the invention; Through realizing linking to each other with the control bus of master controller at bus signals reception/transmitting module; Receive the bus control signal that master controller issues; Extract the valve body opening information that comprises in the said bus control signal through central processing module, be converted into pulse control signal, by the aperture of step motor drive module drive stepper motor adjustment valve body.Thereby realized that master controller can make switching valve according to the invention can satisfy the working environment of total line traffic control through the control of control bus to switching valve.
More than to a kind of electric expansion valve provided by the present invention, stepper motor and selector valve; Carried out detailed introduction; Used concrete example among this paper principle of the present invention and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, part all can change on embodiment and application area.In sum, this description should not be construed as limitation of the present invention.
Claims (17)
1. an electric expansion valve is characterized in that, comprises automatically controlled part and mechanical part; Said mechanical part comprises stepper motor and valve body; Said electric control part branch comprises bus signals reception/transmitting module, central processing module, data memory module, step motor drive module;
Said bus signals reception/transmitting module is used to receive bus control signal and is sent to central processing module;
Said central processing module is used to extract the valve body opening information that comprises in the said bus control signal; Current location information in conjunction with the stepper motor that from said data memory module, reads; Generate corresponding pulse control signal, export the step motor drive module to;
Said data memory module is used to store the current location information of stepper motor;
Said step motor drive module is used for driving the aperture that said stepper motor is adjusted said valve body according to said pulse control signal.
2. electric expansion valve according to claim 1 is characterized in that, said central processing module comprises:
Signal extraction unit is used for extracting the valve body opening information that the bus control signal that receives comprises, the aperture of the valve body that obtains expecting.
Signal conversion unit is used for the aperture of the valve body of said expectation is converted into the desired locations information of stepper motor;
The rotation angle computing unit is used for the desired locations information according to said stepper motor, in conjunction with the position information of the current stepper motor that from data memory module, reads, calculates stepper motor and turns to the angle that said desired locations need rotate from current location;
The pulse generation unit is used for generating corresponding pulse control signal according to the angle that the stepper motor needs rotate, and is sent to the step motor drive module.
3. electric expansion valve according to claim 1 and 2; It is characterized in that said automatically controlled part also comprises the stepper motor monitoring modular, whether the induction electromotive force that is used to monitor on the stepper motor coil takes place unusually; If send abnormal signal to said central processing module.
4. electric expansion valve according to claim 3 is characterized in that, said central processing module calculates the current location information of said stepper motor according to the induction electromotive force abnormal signal that receives, and is stored in the said data memory module.
5. electric expansion valve according to claim 3; It is characterized in that said central processing module also comprises the step-out judging unit, be used to receive said abnormal signal after; Confirm said stepper motor generation step-out phenomenon, send of-step signal to said data memory module.
6. electric expansion valve according to claim 5 is characterized in that said central processing module can also comprise the step-out compensating unit, is used for the said of-step signal according to said data memory module storage, and said stepper motor is carried out the step-out compensation.
7. electric expansion valve according to claim 1 and 2 is characterized in that, said automatically controlled part also comprises temperature detecting module, is used to detect the operating temperature of the valve body of said electric expansion valve, and with detected temperature feedback to central processing module.
8. electric expansion valve according to claim 7; It is characterized in that; Said central processing module also comprises the temperature judging unit, when being used to receive said detected temperatures, judges whether said detected temperatures is in normal temperature range; If said detected temperatures is converted into bus signals is back to master controller; If not, send control signal corresponding to stepper motor driving circuit, the control step motor turns to valve body and is in safe aperture, and the information that said detected temperatures and said valve body have been in safe aperture is converted into bus signals is back to master controller.
9. electric expansion valve according to claim 1 and 2; It is characterized in that; Said central processing module also comprises the automatic homing unit; When being used in the Preset Time section, not receiving the monitoring signal of autonomous controller, send control signal corresponding to stepper motor driving circuit, the control step motor turns to valve body and is in safe aperture.
10. electric expansion valve according to claim 1 and 2 is characterized in that, said electric expansion valve adopts unipolarity step motor drive mode or bipolar stepping motor driving mode.
11. a stepper motor is used for electric expansion valve, comprises coil winding and rotor, it is characterized in that, also comprises circuit board; Said circuit board comprises bus signals reception/transmitting module, central processing module, data memory module;
Said bus signals reception/transmitting module is used to receive bus control signal and is sent to said central processing module;
Said central processing module is used to extract the valve body opening information that comprises in the said bus control signal, in conjunction with the current location information of the stepper motor that from data memory module, reads, generates corresponding pulse control signal, exports said coil winding to;
Said data memory module is used to store the current location information of stepper motor.
12. stepper motor according to claim 11; It is characterized in that said circuit board also comprises the stepper motor monitoring modular, whether the induction electromotive force that is used to monitor on the coil winding of stepper motor takes place unusually; If send abnormal signal to said central processing module.
13. stepper motor according to claim 12; It is characterized in that said central processing module also comprises the step-out judging unit, be used to receive said abnormal signal after; Confirm said stepper motor generation step-out phenomenon, send of-step signal to said data memory module.
14. stepper motor according to claim 13 is characterized in that, said central processing module can also comprise the step-out compensating unit, is used for the said of-step signal according to said data memory module storage, and said stepper motor is carried out the step-out compensation.
15., it is characterized in that said circuit board also comprises temperature detecting module according to each described stepper motor of claim 11 to 14, be used to detect the operating temperature of said stepper motor, and with detected temperature feedback to central processing module.
16. according to each described stepper motor of claim 11 to 14; It is characterized in that; Said central processing module also comprises the automatic homing unit; When being used in the Preset Time section, not receiving the monitoring signal of autonomous controller, send control signal corresponding to said coil winding, the control step motor turns to safe aperture.
17. a selector valve is characterized in that, comprises automatically controlled part and mechanical part; Said mechanical part comprises stepper motor and valve body; Said electric control part branch comprises bus signals reception/transmitting module, central processing module, data memory module, step motor drive module;
Said bus signals reception/transmitting module is used to receive bus control signal and is sent to central processing module;
Said central processing module is used to extract the valve body opening information that comprises in the said bus control signal, in conjunction with the current location information of the stepper motor that from data memory module, reads, generates corresponding pulse control signal, exports the step motor drive module to;
Said data memory module is used to store the current location information of stepper motor;
Said step motor drive module is used for driving the aperture that said stepper motor is adjusted said valve body according to said pulse control signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010264206 CN102374328B (en) | 2010-08-27 | 2010-08-27 | Application of electronic expansion valve and stepper motor thereof to vehicle air conditioner |
| PCT/CN2010/078061 WO2012024855A1 (en) | 2010-08-27 | 2010-10-25 | Electronic expansion valve、stepping motor and reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010264206 CN102374328B (en) | 2010-08-27 | 2010-08-27 | Application of electronic expansion valve and stepper motor thereof to vehicle air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN102374328A true CN102374328A (en) | 2012-03-14 |
| CN102374328B CN102374328B (en) | 2013-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010264206 Active CN102374328B (en) | 2010-08-27 | 2010-08-27 | Application of electronic expansion valve and stepper motor thereof to vehicle air conditioner |
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| Country | Link |
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| CN (1) | CN102374328B (en) |
| WO (1) | WO2012024855A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102374328B (en) | 2013-10-23 |
| WO2012024855A1 (en) | 2012-03-01 |
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