CN202973683U - Electronic openness feedback expansion valve and control system thereof - Google Patents
Electronic openness feedback expansion valve and control system thereof Download PDFInfo
- Publication number
- CN202973683U CN202973683U CN2012204573808U CN201220457380U CN202973683U CN 202973683 U CN202973683 U CN 202973683U CN 2012204573808 U CN2012204573808 U CN 2012204573808U CN 201220457380 U CN201220457380 U CN 201220457380U CN 202973683 U CN202973683 U CN 202973683U
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- Prior art keywords
- expansion valve
- gear
- potentiometer
- electronic
- openness
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The utility model provides an electronic openness feedback expansion valve and a control system thereof. The electronic openness feedback expansion valve comprises a shell, an expansion valve rotor is mounted in the shell, a valve needle is arranged on the expansion valve rotor, a rotary potentiometer is also arranged in the shell of the electronic openness feedback expansion valve, a potentiometer gear is arranged on the rotary potentiometer, an expansion valve gear is arranged on the expansion valve rotor, and the potentiometer gear is meshed with the expansion valve gear. The control system of the electronic openness feedback expansion valve comprises the electronic openness feedback expansion valve, the electronic openness feedback expansion valve is connected with a detection and filtering circuit module, the detection and filtering circuit module is connected with a center control module, and the center control module is connected with a display circuit and transmits a control signal to the electronic openness feedback expansion valve. The electronic openness feedback expansion valve and the control system thereof have the beneficial effect that the actual openness of the electronic expansion valve can be directly reflected, and an openness feedback signal is transmitted to a controller to conveniently discover and solve the step out and other faults and realize the closed-loop control of the openness of the electronic expansion valve.
Description
Technical field
The utility model relates to the electric expansion valve that uses in a kind of refrigeration system, specifically refers to a kind ofly can carry out the air conditioner electronic expansion valve that closed-loop control is fed back and reached to real opening.
Background technology
Electric expansion valve is one of four large parts in air-conditioning system.Usually the control of electric expansion valve is unidirectional, namely sent by control system, and the actual aperture of electric expansion valve can not feed back to control system, and the control of electric expansion valve is open loop like this, and its practical operation situation is also unclear.the body of the electric expansion valve that uses in refrigeration system is stepper motor, the faults such as step-out during controlling, it may occur, when the faults such as electric expansion valve generation step-out, if the pulse signal that the control system of feedback is sent is still normally, namely the aperture of feedback is normal, can not in time find fault, and adjust and safeguard, thereby whole refrigeration system fluctuation of service can appear, can cause aperture not even to control inefficacy, cause the coolant throttle of air-conditioning system to control unsuccessfully, affect the refrigeration of air-conditioning, heating effect, even cause other faults of air-conditioning system.Therefore, obtain the real opening of electric expansion valve, control and to play a significant role for high-performance air-conditioner.
Electronic expansion valve opening feedback of the prior art has following dual mode:
1, be feedback by the pulse signal that control system is sent mostly to the feedback of electronic expansion valve opening, this feedback is not to be the feedback of real opening to electronic expansion valve body actual machine process.
2, arrange that by other positions of the refrigeration system that is connected with electric expansion valve temperature sensors or pressure sensor etc. reflect electronic expansion valve opening indirectly, as following application:
number of patent application 200810061905.4, a kind of refrigeration system that is provided with electronic expansion valve opening control device, the utility model discloses a kind of refrigeration system that is provided with electronic expansion valve opening control device, comprise compressor, evaporimeter, condenser, electric expansion valve and electronic expansion valve opening control device, described electronic expansion valve opening control device comprises controller and the pressure sensor that is electrically connected to controller respectively, temperature sensor, described controller also is electrically connected to electric expansion valve, described pressure sensor is arranged on the condenser medium side in order to detect condensing pressure, described temperature sensor is arranged on the exhaust end of compressor in order to detect compressor exhaust temperature.The utility model control mode is reliable, efficient, and saves cost.
Number of patent application 200920091236.5, a kind of electronic expansion valve refrigeration system, the utility model disclose a kind of electronic expansion valve refrigeration system, belong to the refrigerating plant field.Comprise the compressor, condenser and the evaporimeter that connect successively, be provided with electric expansion valve between condenser and evaporimeter, the drive unit of electric expansion valve is stepper motor, stepper motor connecting electronic expansion valve controller, electronic expansion valve controller Bonding pressure transmitter and temperature transmitter, pressure transmitter is connected back pressure and the suction temperature measuring probe of the outlet of evaporimeter with temperature transmitter, be parallel with at least one magnetic valve on electric expansion valve, magnetic valve connects PLC, the signal output part of PLC difference Bonding pressure transmitter and temperature transmitter.After the magnetic valve in parallel of electric expansion valve side, when step-out appearred in the electric expansion valve stepper motor, PLC controlled the switching of bypass solenoid valve, regulated the degree of superheat.The quantity of magnetic valve and refrigerating capacity can be selected according to the energy of system, and precision is high, have guaranteed the stability of cooling system.
Above-mentioned technical scheme also is difficult to accurately feed back the actual aperture of electric expansion valve, but can't output feedback signal even if can detect expansion valve opening, use as controlling.
Therefore, open degree feedback of the prior art all can not realize reflecting strictly according to the facts the real opening situation of electric expansion valve, thereby in time fixes a breakdown, the stability of maintenance system operation.
The utility model content
Deficiency for the prior art existence, technical problem to be solved in the utility model is, a kind of open degree feedback electric expansion valve and control system thereof are provided, the actual aperture that can directly reflect electric expansion valve, and the open degree feedback signal is sent to controller, be convenient to the faults such as discovery and solution step-out, realize the closed-loop control to electronic expansion valve opening.
For addressing the above problem, technical solution adopted in the utility model is, a kind of open degree feedback electric expansion valve, comprise the expansion valve rotor is installed in shell, shell, on the expansion valve rotor, needle is set, rotating potentiometer also is set in its shell, the potentiometer gear is set on rotating potentiometer, on described expansion valve rotor, the expansion valve gear is set, potentiometer gear and expansion valve gear are intermeshing.
Above-mentioned potentiometer gear and the axial width of expansion valve gear are all more than or equal to the axially-movable stroke of needle; Or any one axial width of potentiometer gear and expansion valve gear is more than or equal to the axially-movable stroke of needle.
Above-mentioned open degree feedback electric expansion valve, the current potential difference that the range of its rotating potentiometer produces more than or equal to the whole strokes of needle.
Above-mentioned open degree feedback electric expansion valve, its rotating potentiometer is parallel with the expansion valve rotor axial.
Above-mentioned open degree feedback electric expansion valve, its rotating potentiometer and expansion valve rotor are installed respectively on fixing in the enclosure sealed compartment.
Above-mentioned open degree feedback electronic expansion valve controls system, it comprises the open degree feedback electric expansion valve, the open degree feedback electric expansion valve connects detection and filter circuit module, detect and be connected Central Control Module with filter circuit module, Central Control Module connects display circuit, and Central Control Module transmits control signal to the open degree feedback electric expansion valve.
The course of work of the present utility model is such:
Coil of electronic expansion valve is applied control signal, the expansion valve rotor, and then the drive needle produces rotatablely moving of rising or descend, this motion of needle, make the expansion valve gear also produce same rising or decline rotatablely moves, and then drive rotatablely moving of the potentiometer gear that is engaged with, the rotation of potentiometer gear must cause the rotation of rotating potentiometer rotating shaft, thus, the rotation of rotating potentiometer rotating shaft will make potentiometer resistance change.Hence one can see that, and the resistance value that potentiometer changes and the rising of needle or the process of descending motion are one to one.So, just can draw the particular location of needle by detection resistance value, that is: obtained the real opening of electric expansion valve.
The utlity model has following advantage and useful technique effect:
1, of the present utility model by gear drive, make the needle of electric expansion valve and the synchronized movement of rotating potentiometer rotating shaft, thereby determine the electronic expansion valve opening situation by the variation of measuring the rotating potentiometer resistance value, can reflect accurately, intuitively the real opening of electric expansion valve.
2, the axial width of potentiometer gear of the present utility model and expansion valve gear is all more than or equal to the axially-movable stroke of needle; Or any one axial width of potentiometer gear and expansion valve gear is more than or equal to the axially-movable stroke of needle, can effectively guarantee needle rise or the decline process in the potentiometer gear and the expansion valve gear intermeshing all the time.
3, the current potential difference that produces more than or equal to the whole strokes of needle of the range of rotating potentiometer of the present utility model, can guarantee in the whole process of magnetic valve aperture all can Measurement accuracy, in the time of can not making valve needle movements arrive a certain position because the rotating potentiometer range is too small, the situation that appearance can't be measured.
4, rotating potentiometer of the present utility model is parallel with the expansion valve rotor axial; Rotating potentiometer and expansion valve rotor are installed respectively on fixing in the enclosure sealed compartment, are all the interference for fear of external force and environment, can better guarantee to measure the accuracy of feedback.
5, open degree feedback electronic expansion valve controls of the present utility model system is closed-loop system, and by display circuit, this opening value is shown in real time, this closed-loop system can improve the electronic expansion valve controls precision, effectively solves the failure problems such as expansion valve step-out, stall.
Description of drawings
Fig. 1 is the utility model open degree feedback electronic expansion valve body structure schematic diagram;
Fig. 2 be in Fig. 1 D to potentiometer gear and the expansion valve gear schematic diagram that cooperatively interacts;
Fig. 3 is that the utility model detects and filter circuit figure;
Fig. 4 is the utility model open degree feedback electronic expansion valve controls system schematic;
In above-mentioned figure:
The specific embodiment
as shown in Figure 1, a kind of open degree feedback electric expansion valve of the present embodiment, comprise shell 1, the interior installation expansion valve of shell 1 rotor 2, needle 3 is set on expansion valve rotor 2, in its shell 1, rotating potentiometer 4 is set also, potentiometer gear 5 is set on rotating potentiometer 4, on described expansion valve rotor 2, expansion valve gear 6 is set, potentiometer gear 5 is intermeshing with expansion valve gear 6, rotating potentiometer 4 and expansion valve rotor 2 axially parallels, rotating potentiometer 4 is arranged on respectively on the interior fixing sealed compartment of shell 1 with expansion valve rotor 2, rotating potentiometer 4 is arranged on upper strata sealed compartment 7, expansion valve rotor 2 is arranged on lower floor's sealed compartment 8.Any one axial width of potentiometer gear 5 and expansion valve gear 6 is more than or equal to the axially-movable stroke of needle 3, and perhaps the axial width of potentiometer gear 5 and expansion valve gear 6 is all more than or equal to the axially-movable stroke of needle 3; The current potential difference that the range of rotating potentiometer 4 produces more than or equal to whole strokes of needle 3.
The open degree feedback electronic expansion valve controls system of the present embodiment, it comprises above-mentioned open degree feedback electric expansion valve, the open degree feedback electric expansion valve connects detection and filter circuit module, detect and be connected Central Control Module with filter circuit module, Central Control Module connects display circuit, and Central Control Module transmits control signal to the open degree feedback electric expansion valve.
The course of work of the utility model embodiment is such:
coil of electronic expansion valve is applied control signal, 2 rotations of expansion valve rotor, and then drive needle 3 produces rotatablely moving of rising or descend, this motion of needle 3, make expansion valve gear 6 also produce same rising or decline rotatablely moves, and then drive rotatablely moving of the potentiometer gear 5 be engaged with, the rotation of potentiometer gear 5 must cause the rotation of rotating potentiometer 4 rotating shafts, thus, the rotation of rotating potentiometer 4 rotating shafts will make the resistance of rotating potentiometer 4 change, can find out that the resistance value of rotating potentiometer 4 variations and the rising of needle 3 or the process of descending motion are one to one.So, just can draw the particular location of needle 3 by the resistance value that detects rotating potentiometer 4 variations, that is: obtained the real opening of electric expansion valve.
The present embodiment can be transformed on electric expansion valve commonly used basis and obtain, it goes without doing processes to the expansion valve coil, as shown in Figure 1, the sealed compartment of lower floor is original electronic expansion valve structure below 8, and upper strata sealed compartment 7 is to the part of lower floor's sealed compartment 8 for transformation; Wherein, needle 3, expansion valve rotor 2 and expansion valve gear 6 are one, and the rotating shaft of rotating potentiometer 4 and potentiometer gear 5 are one.coil of electronic expansion valve is applied control signal, make 2 rotations of expansion valve rotor, and then make needle 3 produce rising or the descending motion of rotation, this motion of needle 3 makes the expansion valve gear 6 with its one also produce same rising or descending motion, simultaneously, cause and the rotatablely moving of the potentiometer gear 5 of expansion valve gear 6 engagement, the rotation of potentiometer gear 5 must cause the rotation of rotating potentiometer 4 rotating shafts, thus, the rotation of rotating potentiometer 4 rotating shafts can make the resistance of rotating potentiometer 4 change, that is: the A in Fig. 1, resistance value between 2 of B is the resistance value of variation, the resistance value that changes and the rising of needle 3 or the process of descending motion are one to one, the resistance value of this variation is drawn with wire, that is: with A, 2 of B receive and detect and filter circuit module, be connected to Central Control Module, detect A, the resistance value that B is 2 just can draw the particular location of needle 3, also just obtained the real opening of electric expansion valve.Diameter by regulator potentiometer gear 5 and expansion valve gear 6 and gear ratio just can be determined suitable proportionate relationship between the resistance value that changes and electronic expansion valve opening.The range of rotating potentiometer 4 will leave surplus, guarantees the measurement of the whole travel range of electric expansion valve.
As shown in Figure 2, measure the physical circuit of A, 2 resistance values of B, namely detecting the circuit that uses with filter circuit module is the AD sample circuit of commonly using, in Fig. 2, the circuit of expression electric expansion valve internal rotating formula potentiometer in the dotted line frame of the left side, the changes in resistance of rotating potentiometer is Rx.2 of A, B be with the A in Fig. 1, B, in these 2 circuit that are connected on Fig. 2, and in Fig. 2, the bleeder circuit of Rx and R1 form right+5V, R2, C1 and C2 are the RC filter circuits.Like this, the conversion of Rx resistance value causes the variation of the upper voltage of R1, i.e. B point potential change in Fig. 2.Thus, the variation of the upper voltage of R1 is also just corresponding one by one with the aperture of electric expansion valve.Voltage change on R1 is sent to the AD port of the controller CPU of Central Control Module through filtering, by the AD conversion of CPU, the real opening that calculating just can draw electric expansion valve this moment.
As shown in Figure 3, Central Control Module shows in real time by the real opening value of display circuit with electric expansion valve, Central Control Module receives this opening value and process simultaneously, send control signal to electric expansion valve, form closed-loop control system, control signal is each phase pulse control signal of common electric expansion valve, and this closed-loop system solves the failure problems such as expansion valve step-out, stall and has good realistic meaning for improving the electronic expansion valve controls precision.
The above, only to preferred embodiment of the present utility model, be not to be that the utility model is done other forms of restriction, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every the utility model scheme content that do not break away to any simple modification made for any of the above embodiments, equivalent variations and remodeling, still belongs to protection domain of the present utility model according to technical spirit of the present utility model.
Claims (6)
1. open degree feedback electric expansion valve, comprise the expansion valve rotor is installed in shell, shell, on the expansion valve rotor, needle is set, it is characterized in that: rotating potentiometer also is set in described shell, the potentiometer gear is set on rotating potentiometer, on described expansion valve rotor, the expansion valve gear is set, potentiometer gear and expansion valve gear are intermeshing.
2. open degree feedback electric expansion valve according to claim 1 is characterized in that: the axial width of described potentiometer gear and expansion valve gear is all more than or equal to the axially-movable stroke of needle; Or any one axial width of potentiometer gear and expansion valve gear is more than or equal to the axially-movable stroke of needle.
3. open degree feedback electric expansion valve according to claim 1, is characterized in that: the current potential difference that the range of described rotating potentiometer produces more than or equal to the whole strokes of needle.
4. open degree feedback electric expansion valve according to claim 1, it is characterized in that: described rotating potentiometer is parallel with the expansion valve rotor axial.
5. open degree feedback electric expansion valve according to claim 1 is characterized in that: described rotating potentiometer and expansion valve rotor are installed respectively on fixing in the enclosure sealed compartment.
6. open degree feedback electronic expansion valve controls claimed in claim 1 system, it is characterized in that: it comprises the open degree feedback electric expansion valve, the open degree feedback electric expansion valve connects detection and filter circuit module, detect and be connected Central Control Module with filter circuit module, Central Control Module connects display circuit, and Central Control Module transmits control signal to the open degree feedback electric expansion valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204573808U CN202973683U (en) | 2012-09-10 | 2012-09-10 | Electronic openness feedback expansion valve and control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204573808U CN202973683U (en) | 2012-09-10 | 2012-09-10 | Electronic openness feedback expansion valve and control system thereof |
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| Publication Number | Publication Date |
|---|---|
| CN202973683U true CN202973683U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204573808U Withdrawn - After Issue CN202973683U (en) | 2012-09-10 | 2012-09-10 | Electronic openness feedback expansion valve and control system thereof |
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| CN (1) | CN202973683U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673426A (en) * | 2012-09-10 | 2014-03-26 | 青岛海信日立空调系统有限公司 | Opening feedback electronic expansion valve and control system thereof |
| CN110486991A (en) * | 2019-09-09 | 2019-11-22 | 珠海格力电器股份有限公司 | Control method, device, equipment and the storage medium of electric expansion valve step-out |
-
2012
- 2012-09-10 CN CN2012204573808U patent/CN202973683U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673426A (en) * | 2012-09-10 | 2014-03-26 | 青岛海信日立空调系统有限公司 | Opening feedback electronic expansion valve and control system thereof |
| CN103673426B (en) * | 2012-09-10 | 2016-11-23 | 青岛海信日立空调系统有限公司 | A kind of open degree feedback electric expansion valve and control system thereof |
| CN110486991A (en) * | 2019-09-09 | 2019-11-22 | 珠海格力电器股份有限公司 | Control method, device, equipment and the storage medium of electric expansion valve step-out |
| CN110486991B (en) * | 2019-09-09 | 2020-08-21 | 珠海格力电器股份有限公司 | Method, device and equipment for controlling step-out of electronic expansion valve and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130605 Effective date of abandoning: 20161012 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130605 Effective date of abandoning: 20161012 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |