WO2022100450A1 - 电子膨胀阀和用于电子膨胀阀的监测方法 - Google Patents

电子膨胀阀和用于电子膨胀阀的监测方法 Download PDF

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Publication number
WO2022100450A1
WO2022100450A1 PCT/CN2021/127139 CN2021127139W WO2022100450A1 WO 2022100450 A1 WO2022100450 A1 WO 2022100450A1 CN 2021127139 W CN2021127139 W CN 2021127139W WO 2022100450 A1 WO2022100450 A1 WO 2022100450A1
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WIPO (PCT)
Prior art keywords
magnetic ring
induction
expansion valve
electronic expansion
driving rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/127139
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English (en)
French (fr)
Inventor
宋治国
王傅钢
邓岳忠
董胜海
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Dunan Artificial Environment Co Ltd
Original Assignee
Zhejiang Dunan Artificial Environment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Dunan Artificial Environment Co Ltd filed Critical Zhejiang Dunan Artificial Environment Co Ltd
Priority to EP21890977.8A priority Critical patent/EP4239232B1/en
Publication of WO2022100450A1 publication Critical patent/WO2022100450A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/0033—Electrical or magnetic means using a permanent magnet, e.g. in combination with a reed relays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/0041—Electrical or magnetic means for measuring valve parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
    • G01R33/07—Hall effect devices
    • G01R33/072—Constructional adaptation of the sensor to specific applications
    • 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

Definitions

  • the present application relates to the technical field of flow control equipment, and in particular, to an electronic expansion valve and a monitoring method for the electronic expansion valve.
  • the electronic expansion valve includes a motor, the motor is controlled to rotate by a controller, and the motor drives the rotor to rotate.
  • the motor When an obstacle is encountered during the rotation of the motor, the motor will be blocked.
  • the electronic expansion valve is blocked, if the controller cannot correctly detect the blocked rotor and take corresponding measures, the operation of the electronic expansion valve will be abnormal; Expansion valve is not working abnormally.
  • the rotor of the electronic expansion valve has two rotation directions. When the rotor rotates in the first direction, the rotor is in the rising stage, and when the rotor rotates in the second direction, the rotor is in the descending stage, and the controller cannot judge the problem of the rotation of the rotor.
  • the electronic expansion valve in the prior art has the problem that the rotation of the rotor cannot be judged.
  • the main purpose of the present application is to provide an electronic expansion valve and a monitoring method for the electronic expansion valve, so as to solve the problem that the electronic expansion valve in the prior art cannot judge the rotation of the rotor.
  • an electronic expansion valve comprising: a frame body, the frame body has a accommodating cavity and an installation cavity; an induction magnetic ring, the induction magnetic ring can be adjusted along the height direction of the accommodating cavity It is movably arranged in the accommodating cavity, and the installation cavity is at least located at the outer circumferential direction of the active area of the accommodating cavity where the induction magnetic ring is located; the Hall sensor, there are at least two Hall sensors, and at least two Hall sensors are located in the installation cavity And arranged around the circumference of the accommodating cavity, at least two Hall sensors are located at the same height, and the induction magnetic ring is always within the detection range of the Hall sensors.
  • the unit of the included angle X is degree; N is an integer.
  • the distances between the at least two Hall sensors and the induction magnetic ring are the same.
  • the distance L between the centers of the induction parts of two adjacent Hall sensors, the number of magnetic poles n of the induction magnetic ring, and the height of the center of the Hall sensor to the center of the induction magnetic ring in the accommodating cavity The projection distance r of the direction satisfies:
  • the induction magnetic ring has an ascending position and a descending position
  • the circumferential side wall of the induction magnetic ring includes an induction surface segment
  • the distance between the induction surface segment and the inner side wall of the accommodating cavity is the same as that of the accommodating cavity.
  • the circumferential side wall of the induction magnetic ring further includes an upper protective surface segment located above the induction surface segment and a lower protective surface segment located below the induction surface segment, the upper protective surface segment and the induction magnetic ring are The top surface arc transitions, and the lower protective surface segment and the bottom surface arc transition of the induction magnetic ring.
  • the height of the induction surface segment is greater than the movement stroke of the induction magnetic ring in the height direction of the accommodating cavity.
  • the electronic expansion valve further includes a driving rotor, the driving rotor is arranged in the accommodating cavity, and the induction magnetic ring is arranged on the side of the driving rotor close to the installation cavity, the driving rotor drives the induction magnetic ring to rotate, and drives the induction magnetic ring to rotate.
  • the rotor has the same number of poles as the induction ring.
  • the Hall sensor is fitted on the outer side wall of the accommodating cavity.
  • the electronic expansion valve further includes at least two fixing brackets, the Hall sensor is attached to the outer side wall of the accommodating cavity through the fixing brackets, and the at least two fixing brackets are connected to the at least two Hall sensors.
  • a one-to-one matching arrangement is used to limit the Hall sensor between the outer side wall of the accommodating cavity and the fixing frame.
  • a monitoring method for an electronic expansion valve has a driving rotor for driving an induction magnetic ring of the electronic expansion valve to rotate and at least two Halls for monitoring the induction magnetic ring
  • the sensor, at least two Hall sensors are arranged at intervals around the circumference of the induction magnetic ring
  • the monitoring method for the electronic expansion valve includes: each Hall sensor simultaneously collects the motion of the induction magnetic ring to form a moving magnetic field curve; The moving magnetic field curves collected by the Hall sensors are compared; the motion of the driving rotor is determined according to the phase difference and/or period of the different moving magnetic field curves.
  • the motion of the driving rotor when determining the motion of the driving rotor according to the phase difference and/or period of different motion magnetic field curves, the motion of the driving rotor at least includes whether the driving rotor is rotating, the driving rotor is in the rising phase, the driving rotor is in decline.
  • the electronic expansion valve has an accommodating cavity and an installation cavity
  • the induction magnetic ring is movably arranged in the accommodating cavity along the height direction of the accommodating cavity
  • the installation cavity is at least located in the accommodating cavity where the induction magnetic ring is located.
  • the circumferential outer side of the active area of the cavity; at least two Hall sensors are located in the installation cavity and are arranged around the circumference of the accommodating cavity, and the center of the induction part of the adjacent two Hall sensors and the center of the induction magnetic ring are in the accommodating cavity.
  • the included angle X between the projections of the height direction of the cavity and the number of magnetic poles n of the induction magnetic ring satisfy:
  • the unit of the included angle X is degree; N is an integer.
  • the distances between the at least two Hall sensors and the induction magnetic ring are the same.
  • the distance L between the centers of the induction parts of two adjacent Hall sensors, the number of magnetic poles n of the induction magnetic ring, and the height of the center of the Hall sensor to the center of the induction magnetic ring in the accommodating cavity The projection distance r of the direction satisfies:
  • the electronic expansion valve includes a frame body, an induction magnetic ring and a Hall sensor, the frame body has a accommodating cavity and an installation cavity; the induction magnetic ring is movably arranged in the accommodating cavity along the height direction of the accommodating cavity Inside, the installation cavity is located at least on the circumferential outer side of the active area of the accommodating cavity where the induction magnetic ring is located; there are at least two Hall sensors, and at least two Hall sensors are located in the installation cavity and are arranged around the circumference of the accommodating cavity, at least The two Hall sensors are located at the same height, and the induction magnetic ring is always within the detection range of the Hall sensors.
  • the induction magnetic ring By setting the accommodating cavity, the induction magnetic ring can move along the height direction of the accommodating cavity, and at the same time, the induction magnetic ring can also rotate in the accommodating cavity. interference, so that the induction magnetic ring can work stably.
  • each Hall sensor can collect the magnetic field of the induction magnetic ring in the process of motion, and form a motion magnetic field curve.
  • the motion of the driving rotor By analyzing the relationship between at least two moving magnetic field curves, the motion of the driving rotor can be judged, and then it can be judged whether the driving rotor is in the rising stage or the descending stage, and it can also be judged whether the driving rotor is rotating.
  • the problem that the electronic expansion valve in the prior art cannot judge the rotation of the rotor is solved.
  • FIG. 1 shows a schematic structural diagram of an electronic expansion valve according to an optional embodiment of the present application.
  • Figure 2 shows an enlarged view at P in Figure 1;
  • FIG. 3 shows an angled view of the electronic expansion valve of FIG. 1;
  • Figure 4 shows a schematic diagram of the angular relationship between the induction magnetic ring and the Hall sensor in Figure 3;
  • Fig. 5 shows the sine wave signal generated when the induction magnetic ring in Fig. 1 rotates in the forward direction
  • Fig. 6 shows the sine wave signal generated when the induction magnetic ring in Fig. 1 rotates in the opposite direction
  • Fig. 7 shows the square wave signal generated when the induction magnetic ring in Fig. 1 rotates in the forward direction
  • Fig. 8 shows the square wave signal generated when the induction magnetic ring in Fig. 1 rotates in the opposite direction.
  • the present application provides an electronic expansion valve and a monitoring method for the electronic expansion valve.
  • the electronic expansion valve includes a frame body 10 , an induction magnetic ring 40 and a Hall sensor 50 , and the frame body 10 has a accommodating cavity 20 and an installation cavity 30 ;
  • the height direction is movably arranged in the accommodating cavity 20, and the installation cavity 30 is at least located at the outer circumferential direction of the active area of the accommodating cavity 20 where the induction magnetic ring 40 is located; there are at least two Hall sensors 50, at least two Hall sensors At least two Hall sensors 50 are located at the same height, and the induction magnetic ring 40 is always within the detection range of the Hall sensors 50 .
  • the induction magnetic ring 40 can move along the height direction of the accommodating cavity 20, and at the same time, the induction magnetic ring 40 can also rotate in the accommodating cavity 20, and the arrangement of the accommodating cavity 20 can reduce other structural parts
  • the interference to the motion of the induction magnetic ring 40 enables the induction magnetic ring 40 to work stably.
  • each Hall sensor 50 can collect the magnetic field of the induction magnetic ring 40 during the movement process, and form a movement magnetic field curve.
  • the motion of the driving rotor 60 can be judged by analyzing the relationship between at least two motion magnetic field curves, and then it can be judged whether the driving rotor 60 is in the ascending stage or the descending stage, and can also judge whether the driving rotor 60 is rotating.
  • the problem that the electronic expansion valve in the prior art cannot judge the rotation of the rotor is solved.
  • the electronic expansion valve further includes a driving rotor 60 , the driving rotor 60 is arranged in the accommodating cavity 20 , and the induction magnetic ring 40 is arranged on the side of the driving rotor 60 close to the installation cavity 30 , and the driving rotor 60 drives the induction magnetic
  • the ring 40 rotates, and the driving rotor 60 has the same number of magnetic poles as the induction magnetic ring 40 .
  • the driving rotor 60 drives the induction magnetic ring 40 to rotate, and the number of magnetic poles of the driving rotor 60 is the same as the magnetic pole number of the induction magnetic ring 40, which can avoid the influence of the magnetic poles of the driving rotor 60 on the magnetic field generated by the induction magnetic ring 40, so as to ensure the Hall sensor 50 can work stably.
  • the induction magnetic ring 40 and the driving rotor 60 may be integrally provided, which facilitates the synchronous rotation of the driving rotor 60 and the induction magnetic ring 40 .
  • the driving rotor 60 drives the induction magnetic ring 40 to rotate, and the driving rotor 60 and the induction magnetic ring 40 are connected together.
  • the driving rotor 60 rotates, the induction magnetic ring 40 is driven to move synchronously.
  • the induction magnetic ring 40 rotates; when the driving rotor 60 is in the rising phase, the induction magnetic ring 40 is in the rising phase; when the driving rotor 60 is in the descending phase, the induction magnetic ring 40 is in the falling phase. That is, the motion of the induction magnetic ring 40 can indicate the motion of the driving rotor 60 .
  • the motion of the driving rotor 60 can also be judged, and then it can be judged whether the driving rotor 60 is in the ascending stage or the descending stage, and it can also be judged whether the driving rotor 60 is rotating.
  • the rotation directions of the driving rotor 60 are different when the driving rotor 60 is in the ascending phase and in the descending phase, the phase differences of the two moving magnetic field curves are opposite.
  • an electronic expansion valve which curve needs to be given is the rising phase or the falling phase. Or it is given whether the positive or negative of the phase difference of the two motion curves corresponds to the rising phase or the falling phase, etc., so as to determine whether the driving rotor 60 is in the rising phase or the falling phase.
  • one Hall sensor 50 is calibrated as the first Hall sensor
  • the other Hall sensor 50 is the second Hall sensor
  • the phase difference is the movement of the first Hall sensor
  • the moving magnetic field curve of the induction magnetic ring 40 collected by the Hall sensor 50 is regular.
  • the cycle of the curve has changed.
  • the period of the motion magnetic field curve during normal motion of the induction magnetic ring 40 is collected in advance. During the operation of the electronic expansion valve, if the period of the moving magnetic field curve is less than the period of the moving magnetic field curve when the induction magnetic ring 40 is in normal motion, the electronic expansion valve is locked.
  • the included angle X between the projection of the center of the induction part of the two adjacent Hall sensors 50 and the center of the induction magnetic ring 40 in the height direction of the accommodating cavity 20 , the induction magnetic ring 40 The number of magnetic poles n satisfies:
  • the unit of the included angle X is degree; N is an integer.
  • the included angle between two adjacent Hall sensors 50 is determined according to the number n of magnetic poles of the induction magnetic ring, and at the same time, how many Hall sensors 50 can be placed can also be calculated. This setting can accurately judge the motion of the induction magnetic ring through the motion magnetic field curve.
  • the angle is an acute angle, so the degree of the included angle X is greater than 0 degrees and less than or equal to 180 degrees. This facilitates the calculation of how many Hall sensors 50 can be placed.
  • the relationship between the included angle X and the number of magnetic poles n is a check function.
  • the distances between the at least two Hall sensors 50 and the induction magnetic ring 40 are the same.
  • the intensity of the magnetic field of the induction magnetic ring 40 collected by each Hall sensor 50 is the same, and the peak value and period of the at least two moving magnetic field curves are the same, so that the drive can be judged by the at least two moving magnetic field curves. Movement of the rotor 60 .
  • the distance L between the centers of the induction parts of two adjacent Hall sensors 50 , the number of magnetic poles n of the induction magnetic ring 40 , and the center of the Hall sensor 50 to the center of the induction magnetic ring 40 are within the The projection distance r in the height direction of the cavity 20 satisfies:
  • the unit of distance L is centimeters
  • the unit of projection distance r is centimeters.
  • the distance L and the projection distance r may be units of length.
  • the units of the distance L and the projection distance r can also be length units such as millimeters and meters.
  • the distance L and the projected distance r are a linear function.
  • the distance L between the centers of the induction parts of the two adjacent Hall sensors 50 is designed to be different in the number n of the magnetic poles of the induction magnetic rings 40 .
  • the induction magnetic ring 40 has an ascending position and a descending position
  • the circumferential side wall of the induction magnetic ring 40 includes an induction surface segment 41
  • the distance between the induction surface segment 41 and the inner side wall of the accommodating cavity 20 is the same as that of the accommodating cavity.
  • the height direction of 20 does not change.
  • the magnetic pole of the induction magnetic ring 40 is arranged on the induction surface segment 41, and the distance between the induction surface segment 41 and the inner side wall of the accommodating cavity 20 is constant in the height direction of the accommodating cavity 20, so that the Hall sensor 50 collects What is obtained is a periodically stable magnetic field, which is convenient for judging the motion of the driving rotor 60 by moving the magnetic field curve.
  • This arrangement enables the Hall sensor 50 to detect the sensing surface segment 41 all the time, so as to ensure that the Hall sensor 50 can monitor the movement of the sensing magnetic ring 40 in real time.
  • the circumferential side wall of the induction magnetic ring 40 further includes an upper protection surface segment 42 located above the induction surface segment 41 and a lower protection surface segment 43 located below the induction surface segment 41 .
  • the upper protection surface segment 42 is connected to the induction surface segment 42 .
  • the arc of the top surface of the magnetic ring 40 transitions, and the lower protective surface segment 43 transitions to the arc of the bottom surface of the induction magnetic ring 40 .
  • the arrangement of the upper protective surface segment 42 and the lower protective surface segment 43 can form protection for the sensing surface segment 41 to prevent the sensing surface segment 41 from being hit by other structures, and ensure the working stability of the sensing surface segment 41 to produce stable operation. magnetic field.
  • the upper protective surface segment 42 transitions with the arc on the top surface of the induction magnetic ring 40, and the lower protective surface segment 43 transitions with the arc on the bottom surface of the induction magnetic ring 40.
  • This arrangement facilitates the induction magnetic ring 40 to move in the accommodating cavity 20 to avoid induction
  • the magnetic ring 40 rubs the inner side wall of the accommodating cavity 20 , which ensures the stability of the induction magnetic ring 40 in operation.
  • the height of the induction surface segment 41 is greater than the movement stroke of the induction magnetic ring 40 in the height direction of the accommodating cavity 20 .
  • the sensing surface segment 41 is always within the detection range of the Hall sensor 50 , which ensures that the Hall sensor 50 can detect the sensing surface segment 41 in real time.
  • the Hall sensor 50 is attached and disposed on the outer side wall of the accommodating cavity 20 .
  • This arrangement is convenient for the installation of the Hall sensor 50 , and it is convenient to make the distance between the Hall sensor 50 and the induction magnetic ring 40 the same, so as to ensure the stability of the detection of the Hall sensor 50 .
  • the accommodating cavity 20 is cylindrical, and the induction magnetic ring 40 is circular.
  • the electronic expansion valve further includes at least two fixing brackets, the hall sensor 50 is attached to the outer side wall of the accommodating cavity 20 through the fixing brackets, and the at least two fixing brackets are arranged in a one-to-one correspondence with the at least two Hall sensors 50 , so as to limit the Hall sensor 50 between the outer side wall of the accommodating cavity 20 and the fixing frame.
  • the arrangement of the fixing frame provides an installation position for the Hall sensor 50 , so that the Hall sensor 50 can be fitted and arranged with the outer side wall of the accommodating cavity 20 .
  • the fixing frame also forms protection for the Hall sensor 50, so as to avoid collision of the Hall sensor 50 with other structural components, so as to ensure the stable operation of the Hall sensor 50.
  • the electronic expansion valve has a driving rotor 60 that drives the induction magnetic ring 40 of the electronic expansion valve to rotate, and at least two Hall sensors 50 for monitoring the induction magnetic ring 40 , and the at least two Hall sensors 50 surround the circumference of the induction magnetic ring 40 .
  • the monitoring method for the electronic expansion valve includes: each Hall sensor 50 collects the motion of the induction magnetic ring 40 at the same time to form a moving magnetic field curve; compares the moving magnetic field curves collected by different Hall sensors; The phase difference and/or period of the different moving magnetic field curves determine the motion of the driving rotor 60 .
  • each Hall sensor 50 can collect the magnetic field of the induction magnetic ring 40 during the movement process, and form a movement magnetic field curve.
  • the motion of the driving rotor 60 is judged by analyzing the relationship between at least two motion magnetic field curves. Specifically, when determining the motion of the driving rotor 60 according to the phase difference and/or period of different motion magnetic field curves, the motion of the driving rotor 60 at least includes whether the driving rotor 60 is rotating, the driving rotor 60 is in the rising stage, and the driving rotor 60 is in the descending stage. Since the rotation directions of the driving rotor 60 are different in the ascending phase and the descending phase, the phase differences of the two moving magnetic field curves are opposite.
  • the driving rotor 60 it can be determined whether the driving rotor 60 is in the rising stage or the falling stage according to the phase difference. Since the driving rotor 60 rotates at a constant speed, the moving magnetic field curve of the induction magnetic ring 40 collected by the Hall sensor 50 is regular. The cycle of the curve has changed. By observing the cycle of the moving magnetic field curve, it can be judged whether the induction magnetic ring is locked.
  • the motion of the driving rotor 60 is determined according to the phase difference and/or period of the different moving magnetic field curves, it is determined that the driving rotor 60 is in the rising phase or the falling phase according to the phase difference of the different moving magnetic field curves; according to the different moving magnetic field curves period to determine whether the driving rotor 60 rotates.
  • the moving magnetic field curve of the induction magnetic ring 40 collected by the Hall sensor 50 is regular.
  • the moving magnetic field curve of the driving rotor 60 The period of the magnetic field has changed. By observing the period of the moving magnetic field curve, it can be judged whether the induction magnetic ring has stalled.
  • the electronic expansion valve the period of the motion magnetic field curve during normal motion of the induction magnetic ring 40 is collected in advance. During the operation of the electronic expansion valve, if the period of the moving magnetic field curve is less than the period of the moving magnetic field curve when the induction magnetic ring 40 is in normal motion, the electronic expansion valve is locked.
  • two Hall sensors 50 there are two Hall sensors 50.
  • the phase difference between the two moving magnetic field curves is If it is positive, it is determined that the driving rotor 60 is in the rising phase; if the phase difference between the two moving magnetic field curves is negative, it is determined that the driving rotor 60 is in the falling phase.
  • One Hall sensor 50 is calibrated as the first Hall sensor, the other Hall sensor 50 is the second Hall sensor, and the phase difference is the moving magnetic field curve of the first Hall sensor minus the second Hall sensor The moving magnetic field curve.
  • phase difference between the two moving magnetic field curves When the phase difference between the two moving magnetic field curves is positive, it is determined that the driving rotor 60 is in the rising phase, and when the phase difference between the two moving magnetic field curves is negative, it is determined that the driving rotor 60 is in the falling phase. In this way, it can be judged whether the driving rotor 60 is in the ascending stage or the descending stage according to the positive and negative of the limit difference of the two moving magnetic field curves.
  • the solid line is the moving magnetic field curve of the first Hall sensor 50
  • the dotted line is the moving magnetic field curve of the second Hall sensor 50 .
  • FIG. 5 when the driving rotor 60 rotates in the forward direction, the solid line is ahead of the dotted line, and the phase difference is positive.
  • FIG. 6 when the driving rotor 60 rotates in the reverse direction, the dotted line is ahead of the solid line, and the phase difference is negative.
  • the moving magnetic field curve of the Hall sensor 50 is a square wave
  • the solid line is the moving magnetic field curve of the first Hall sensor 50
  • the dotted line is the second Hall sensor 50
  • the moving magnetic field curve As shown in FIG. 7 , when the driving rotor 60 rotates in the forward direction, the solid line is ahead of the dotted line, and the phase difference is positive. As shown in FIG. 8 , when the driving rotor 60 rotates in the reverse direction, the dotted line is ahead of the solid line, and the phase difference is negative.
  • the number of Hall sensors 50 may also be at least two, and only the phase difference of the moving magnetic field curves of the two Hall sensors 50 may be referred to, or the phase difference of the moving magnetic field curves of at least two Hall sensors 50 may be referred to.
  • the included angle X between the projection of the center of the induction part of the two adjacent Hall sensors 50 and the center of the induction magnetic ring 40 in the height direction of the accommodating cavity 20 , the induction magnetic ring 40 The number of magnetic poles n satisfies:
  • the unit of the included angle X is degree; N is an integer.
  • the included angle between two adjacent Hall sensors 50 is determined according to the number n of magnetic poles of the induction magnetic ring, and at the same time, how many Hall sensors 50 can be placed can also be calculated. This setting can accurately judge the motion of the induction magnetic ring through the motion magnetic field curve.
  • the distances between the at least two Hall sensors 50 and the induction magnetic ring 40 are the same.
  • the intensity of the magnetic field of the induction magnetic ring 40 collected by each Hall sensor 50 is the same, and the peak value and period of the at least two moving magnetic field curves are the same, so that the drive can be judged by the at least two moving magnetic field curves. Movement of the rotor 60 .
  • the distance L between the centers of the induction parts of two adjacent Hall sensors 50 , the number of magnetic poles n of the induction magnetic ring 40 , and the center of the Hall sensor 50 to the center of the induction magnetic ring 40 are within the The projection distance r in the height direction of the cavity 20 satisfies:
  • the unit of distance L is centimeters
  • the unit of projection distance r is centimeters.
  • the distance L and the projection distance r may be units of length.
  • the units of the distance L and the projection distance r can also be length units such as millimeters and meters.
  • the distance L and the projected distance r are a linear function.
  • the distance L between the centers of the induction parts of the two adjacent Hall sensors 50 is designed to be different in the number n of the magnetic poles of the induction magnetic rings 40 .
  • the electronic expansion valve also includes a coil assembly, a valve body assembly, and a sleeve.
  • the coil assembly is arranged in the frame body 10 and is located outside the driving rotor 60.
  • the valve body assembly includes a valve seat and a valve needle. The valve needle opens and closes the valve with the movement of the driving rotor 60.
  • the valve port on the seat, the sleeve is arranged in the accommodating cavity 20 and is fixedly connected with the valve body assembly, the sleeve has a cavity, and the driving rotor 60 moves in the sleeve.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

一种电子膨胀阀和用于电子膨胀阀的监测方法。电子膨胀阀包括：架体(10)，架体(10)具有容置腔(20)和安装腔(30)；感应磁环(40)，感应磁环(40)沿容置腔(20)的高度方向可移动地设置在容置腔(20)内，安装腔(30)至少位于感应磁环(40)所在容置腔(20)的活动区域的周向外侧；霍尔传感器(50)为至少两个，位于安装腔(30)内并绕容置腔(20)的周侧设置，位于同一高度处，感应磁环(40)始终处于霍尔传感器(50)的检测范围内,解决了现有技术中电子膨胀阀存在无法判断转子的转动情况的问题。

Description

电子膨胀阀和用于电子膨胀阀的监测方法 技术领域
本申请涉及一种流量控制设备技术领域，具体而言，涉及一种电子膨胀阀和用于电子膨胀阀的监测方法。
背景技术
目前，电子膨胀阀包括电机，电机由控制器控制转动，电机带动转子转动，在电机转动的过程中遇到障碍物时，电机会发生堵转。在电子膨胀阀发生堵转时，如果控制器不能正确检测到堵转并采取相应的措施，电子膨胀阀的工作将出现异常；或者如果控制器误报了电机的堵转信息，也会导致电子膨胀阀的工作异常。而电子膨胀阀的转子具有两个转动方向，转子向第一方向转动时，转子处于上升阶段，转子向第二方向转动时，转子处于下降阶段，控制器无法判断转子的转动情况的问题。
也就是说，现有技术中电子膨胀阀存在无法判断转子的转动情况的问题。
申请内容
本申请的主要目的在于提供一种电子膨胀阀和用于电子膨胀阀的监测方法，以解决现有技术中电子膨胀阀存在无法判断转子的转动情况的问题。
为了实现上述目的，根据本申请的一个方面，提供了一种电子膨胀阀，包括：架体，架体具有容置腔和安装腔；感应磁环，感应磁环沿容置腔的高度方向可移动地设置在容置腔内，安装腔至少位于感应磁环所在容置腔的活动区域的周向外侧；霍尔传感器，霍尔传感器为至少两个，至少两个霍尔传感器位于安装腔内并绕容置腔的周侧设置，至少两个霍尔传感器位于同一高度处，感应磁环始终处于霍尔传感器的检测范围内。
在本申请的一个实施例中，相邻两个霍尔传感器的感应部的中心和感应磁环的中心在容置腔的高度方向的投影之间的夹角X、感应磁环的磁极数n之间满足：
X＝N*(360/n)+(360/2/n)                                           公式(1)
其中，夹角X的单位为度；N为整数。
在本申请的一个实施例中，至少两个霍尔传感器与感应磁环之间的距离相同。
在本申请的一个实施例中，相邻两个霍尔传感器的感应部的中心的距离L、感应磁环的磁极数n和霍尔传感器的中心到感应磁环的中心在容置腔的高度方向的投影距离r之间满足：
L＝2*r*sin[(2*N+1)*π/(2*n)]                                  公式(2)。
在本申请的一个实施例中，感应磁环具有上升位和下降位，感应磁环的周向侧壁包括感应面段，感应面段与容置腔的内侧壁之间的距离在容置腔的高度方向上不变，感应磁环位于下降位时，感应面段的顶部侧向霍尔传感器的投影位于霍尔传感器的感应部内；感应磁环位于上升位时，感应面段的底部侧向霍尔传感器的投影位于霍尔传感器的感应部内。
在本申请的一个实施例中，感应磁环的周向侧壁还包括位于感应面段上方的上部保护面段和位于感应面段下方的下部保护面段，上部保护面段与感应磁环的顶面圆弧过渡，下部保护面段与感应磁环的底面圆弧过渡。
在本申请的一个实施例中，感应面段的高度大于感应磁环在容置腔的高度方向上的运动行程。
在本申请的一个实施例中，电子膨胀阀还包括驱动转子，驱动转子设置在容置腔内，且感应磁环设置在驱动转子靠近安装腔的一侧，驱动转子驱动感应磁环转动，驱动转子与感应磁环的磁极数相同。
在本申请的一个实施例中，霍尔传感器贴合设置在容置腔的外侧壁上。
在本申请的一个实施例中，电子膨胀阀还包括至少两个固定架，霍尔传感器通过固定架贴合在容置腔的外侧壁上，且至少两个固定架与至少两个霍尔传感器一一对应贴合设置，以将霍尔传感器限位在容置腔的外侧壁与固定架之间。
根据本申请的另一方面，提供了一种用于电子膨胀阀的监测方法，电子膨胀阀具有驱动电子膨胀阀的感应磁环转动的驱动转子和至少两个用于监测感应磁环的霍尔传感器，至少两个霍尔传感器绕感应磁环的周侧间隔设置，用于电子膨胀阀的监测方法包括：各霍尔传感器分别同时采集感应磁环的运动情况，以形成运动磁场曲线；将不同的霍尔传感器采集的运动磁场曲线进行比较；根据不同的运动磁场曲线的相位差和/或周期以确定驱动转子的运动情况。
在本申请的一个实施例中，根据不同运动磁场曲线的相位差和/或周期以确定驱动转子的运动情况时，驱动转子的运动情况至少包括驱动转子是否转动、驱动转子处于上升阶段、驱动转子处于下降阶段。
在本申请的一个实施例中，根据不同运动磁场曲线的相位差和/或周期以确定驱动转子的运动情况时，根据不同运动磁场曲线的相位差以确定驱动转子处于上升阶段或下降阶段；根据不同运动磁场曲线的周期以确定驱动转子是否转动。
在本申请的一个实施例中，电子膨胀阀具有容置腔和安装腔，感应磁环沿容置腔的高度方向可移动地设置在容置腔内，安装腔至少位于感应磁环所在容置腔的活动区域的周向外侧；至少两个霍尔传感器位于安装腔内并绕容置腔的周侧设置，相邻两个霍尔传感器的感应部的中心和感应磁环的中心在容置腔的高度方向的投影之间的夹角X、感应磁环的磁极数n之间满足：
X＝N*(360/n)+(360/2/n)                                           公式(1)
其中，夹角X的单位为度；N为整数。
在本申请的一个实施例中，至少两个霍尔传感器与感应磁环之间的距离相同。
在本申请的一个实施例中，相邻两个霍尔传感器的感应部的中心的距离L、感应磁环的磁极数n和霍尔传感器的中心到感应磁环的中心在容置腔的高度方向的投影距离r之间满足：
L＝2*r*sin[(2*N+1)*π/(2*n)]                                  公式(2)。
应用本申请的技术方案，电子膨胀阀包括架体、感应磁环和霍尔传感器，架体具有容置腔和安装腔；感应磁环沿容置腔的高度方向可移动地设置在容置腔内，安装腔至少位于感应磁环所在容置腔的活动区域的周向外侧；霍尔传感器为至少两个，至少两个霍尔传感器位于安装腔内并绕容置腔的周侧设置，至少两个霍尔传感器位于同一高度处，感应磁环始终处于霍尔传感器的检测范围内。
通过设置容置腔，使得感应磁环能够沿容置腔的高度方向移动，同时感应磁环还能够在容置腔内进行转动，容置腔的设置可以减少其他结构件对感应磁环运动的干涉，使得感应磁环能够稳定工作。通过设置至少两个霍尔传感器，各霍尔传感器能够采集感应磁环在运动过程中的磁场，并形成运动磁场曲线。通过分析至少两个运动磁场曲线的关系来判断驱动转子的运动情况，进而判断驱动转子是处于上升阶段还是处于下降阶段，还能够判断驱动转子是否转动。解决了现有技术中电子膨胀阀存在无法判断转子的转动情况的问题。
附图说明
构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1示出了根据本申请的一个可选实施例的电子膨胀阀的结构示意图；以及
图2示出了图1中P处的放大图；
图3示出了图1电子膨胀阀的一个角度的视图；
图4示出了图3中感应磁环与霍尔传感器的角度关系示意图；
图5示出了图1中感应磁环正向转动时产生的正弦波信号；
图6示出了图1中感应磁环反向转动时产生的正弦波信号；
图7示出了图1中感应磁环正向转动时产生的方波信号；
图8示出了图1中感应磁环反向转动时产生的方波信号。
其中，上述附图包括以下附图标记：
10、架体；20、容置腔；30、安装腔；40、感应磁环；41、感应面段；42、上部保护面段；43、下部保护面段；50、霍尔传感器；60、驱动转子。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。
需要指出的是，除非另有指明，本申请使用的所有技术和科学术语具有与本申请所属技术领域的普通技术人员通常理解的相同含义。
在本申请中，在未作相反说明的情况下，使用的方位词如“上、下、顶、底”通常是针对附图所示的方向而言的，或者是针对部件本身在竖直、垂直或重力方向上而言的；同样地，为便于理解和描述，“内、外”是指相对于各部件本身的轮廓的内、外，但上述方位词并不用于限制本申请。
为了解决现有技术中电子膨胀阀存在无法判断转子的转动情况的问题，本申请提供了一种电子膨胀阀和用于电子膨胀阀的监测方法。
如图1至图8所示，电子膨胀阀包括架体10、感应磁环40和霍尔传感器50，架体10具有容置腔20和安装腔30；感应磁环40沿容置腔20的高度方向可移动地设置在容置腔20内，安装腔30至少位于感应磁环40所在容置腔20的活动区域的周向外侧；霍尔传感器50为至少两个，至少两个霍尔传感器50位于安装腔30内并绕容置腔20的周侧设置，至少两个霍尔传感器50位于同一高度处，感应磁环40始终处于霍尔传感器50的检测范围内。
通过设置容置腔20，使得感应磁环40能够沿容置腔20的高度方向移动，同时感应磁环40还能够在容置腔20内进行转动，容置腔20的设置可以减少其他结构件对感应磁环40运动的干涉，使得感应磁环40能够稳定工作。通过设置至少两个霍尔传感器50，各霍尔传感器50能够采集感应磁环40在运动过程中的磁场，并形成运动磁场曲线。通过分析至少两个运动磁场曲线的关系来判断驱动转子60的运动情况，进而判断驱动转子60是处于上升阶段还是处于下降阶段，还能够判断驱动转子60是否转动。解决了现有技术中电子膨胀阀存在无法判断转子的转动情况的问题。
如图1所示，电子膨胀阀还包括驱动转子60，驱动转子60设置在容置腔20内，且感应磁环40设置在驱动转子60靠近安装腔30的一侧，驱动转子60驱动感应磁环40转动，驱动转子60与感应磁环40的磁极数相同。驱动转子60驱动感应磁环40转动，而驱动转子60的磁极数与感应磁环40的磁极数相同，可以避免驱动转子60的磁极对感应磁环40产生的磁场的影响，以保证霍尔传感器50能够稳定工作。
当然，感应磁环40与驱动转子60可以是一体设置的，这样便于驱动转子60与感应磁环40同步转动。
需要说明的是，驱动转子60驱动感应磁环40转动，且驱动转子60与感应磁环40之间是连接在一起的，在驱动转子60转动时会同步带动感应磁环40运动。或者说，驱动转子60转动，则感应磁环40转动；驱动转子60处于上升阶段，则感应磁环40处于上升阶段；驱动转子60处于下降阶段，则感应磁环40处于下降阶段。也就是说，感应磁环40的运动能表明驱动转子60的运动。通过分析多个运动磁场曲线的关系也可以来判断驱动转子60的运动情况，进而判断驱动转子60是处于上升阶段还是处于下降阶段，还能够判断驱动转子60是否转动。需要说明的是，由于驱动转子60在处于上升阶段和处于下降阶段时的转动方向不同，进而使得两个运动磁场曲线的相位差是相反的。在进行设计电子膨胀阀时，需要给哪条曲线在前时是上升阶段还是下降阶段。或者给定两条运动曲线的相位差的正负对应的是上升阶段还是下降阶段等，以用于判断驱动转子60处于上升阶段还是下降阶段。
以两个霍尔传感器50为例，标定一个霍尔传感器50为第一个霍尔传感器，则另一个霍尔传感器50为第二个霍尔传感器，相位差为第一个霍尔传感器的运动磁场曲线减去第二个霍尔传感器的运动磁场曲线。当两条运动磁场曲线的相位差为正，则确定驱动转子60处于上升阶段，当两条运动磁场曲线的相位差为负，则确定驱动转子60处于下降阶段。这样就可以根据两条运动磁场曲线的限位差的正负来判断驱动转子60是处于上升阶段还是下降阶段的。
由于驱动转子60是匀速转动的，所以霍尔传感器50采集到的感应磁环40的运动磁场曲线是规律的，在驱动转子60不再转动或不再匀速转动时，感应磁环40的运动磁场曲线的周期则就发生了改变，通过观察运动磁场曲线的周期来判断电子膨胀阀是否发生了堵转。在设计电子膨胀阀时，预先采集感应磁环40正常运动时的运动磁场曲线的周期。在电子膨胀阀工作的过程中，若运动磁场曲线的周期小于感应磁环40正常运动时的运动磁场曲线的周期，则电子膨胀阀发生堵转。
如图3和图4所示，相邻两个霍尔传感器50的感应部的中心和感应磁环40的中心在容置腔20的高度方向的投影之间的夹角X、感应磁环40的磁极数n之间满足：
X＝N*(360/n)+(360/2/n)                                           公式(1)
其中，夹角X的单位为度；N为整数。
根据感应磁环的磁极数n来确定相邻两个霍尔传感器50之间的夹角，同时也能计算出可以放置多少个霍尔传感器50。这样设置能够准确通过运动磁场曲线来判断感应磁环的运动情况。
需要说明的是，一般情况下说的角度为锐角，所以夹角X的度数大于0度小于等于180度。这样便于计算能够放置多少个霍尔传感器50。
夹角X与磁极数n之间的关系是对勾函数。
具体的，至少两个霍尔传感器50与感应磁环40之间的距离相同。这样设置使得每个霍尔传感器50采集到的感应磁环40的磁场的强度是相同的，而至少两个运动磁场曲线的峰值和周期是相同的，便于通过至少两个运动磁场曲线来判断驱动转子60的运动情况。
如图3和图4所示，相邻两个霍尔传感器50的感应部的中心的距离L、感应磁环40的磁极数n和霍尔传感器50的中心到感应磁环40的中心在容置腔20的高度方向的投影距离r之间满足：
L＝2*r*sin[(2*N+1)*π/(2*n)]                                    公式(2)
其中，距离L的单位为厘米，投影距离r的单位为厘米。
当然，距离L和投影距离r是长度单位即可。距离L和投影距离r的单位也可以是毫米、米等长度单位。
在感应磁环40的磁极数n确定的情况下，距离L与投影距离r之间是一次函数。相邻两个霍尔传感器50的感应部的中心的距离L与感应磁环40的磁极数n和霍尔传感器50的中心到感应磁环40的中心在容置腔20的高度方向的投影距离r有关，不同的感应磁环40的磁极数n中，设计的相邻的两个霍尔传感器50的感应部的中心的距离L不同。
可选地，感应磁环40具有上升位和下降位，感应磁环40的周向侧壁包括感应面段41，感应面段41与容置腔20的内侧壁之间的距离在容置腔20的高度方向上不变，感应磁环40位于下降位时，感应面段41的顶部侧向霍尔传感器50的投影位于霍尔传感器50的感应部内；感应磁环40位于上升位时，感应面段41的底部侧向霍尔传感器50的投影位于霍尔传感器50的感应部内。感应磁环40的磁极设置在感应面段41上，而将感应面段41与容置腔20的内侧壁之间的距离在容置腔20的高度方向上不变，使得霍尔传感器50采集到的是周期稳定的磁场，便于用于通过运动磁场曲线来判断驱动转子60的运动情况。这样设置使得霍尔传感器50能够始终检测到感应面段41，以保证霍尔传感器50能够实时监测感应磁环40的运动情况。
如图2所示，感应磁环40的周向侧壁还包括位于感应面段41上方的上部保护面段42和位于感应面段41下方的下部保护面段43，上部保护面段42与感应磁环40的顶面圆弧过渡，下部保护面段43与感应磁环40的底面圆弧过渡。上部保护面段42和下部保护面段43的设置，能够对感应面段41形成保护，以避免感应面段41被其他结构撞到，保证了感应面段41工作的稳定性，以产生稳定的磁场。上部保护面段42与感应磁环40的顶面圆弧过渡，下部保护面段43与感应磁环40的底面圆弧过渡，这样设置便于感应磁环40在容置腔20中运动，避免感应磁环40对容置腔20的内侧壁形成剐蹭，保证了感应磁环40工作的稳定性。
具体的，感应面段41的高度大于感应磁环40在容置腔20的高度方向上的运动行程。这样设置使得感应面段41始终处于霍尔传感器50的检测范围内，保证霍尔传感器50能够实时检测到感应面段41。
如图1所示，霍尔传感器50贴合设置在容置腔20的外侧壁上。这样设置便于对霍尔传感器50的安装，便于使得霍尔传感器50与感应磁环40之间的距离相同，以保证霍尔传感器50检测的稳定性。
需要说明的是，容置腔20为圆柱状，感应磁环40为圆饼状。
电子膨胀阀还包括至少两个固定架，霍尔传感器50通过固定架贴合在容置腔20的外侧壁上，且至少两个固定架与至少两个霍尔传感器50一一对应贴合设置，以将霍尔传感器50限位在容置腔20的外侧壁与固定架之间。固定架的设置为霍尔传感器50提供了安装位置，便于霍尔传感器50与容置腔20的外侧壁贴合设置。固定架还对霍尔传感器50形成保护，以避免其他结构件对霍尔传感器50形成碰撞，保证了霍尔传感器50稳定工作。
电子膨胀阀具有驱动电子膨胀阀的感应磁环40转动的驱动转子60和至少两个用于监测感应磁环40的霍尔传感器50，至少两个霍尔传感器50绕感应磁环40的周侧间隔设置，用于电子膨胀阀的监测方法包括：各霍尔传感器50分别同时采集感应磁环40的运动情况，以形成运动磁场曲线；将不同的霍尔传感器采集的运动磁场曲线进行比较；根据不同运动磁场曲线的相位差和/或周期以确定驱动转子60的运动情况。
通过设置至少两个霍尔传感器50，各霍尔传感器50能够采集感应磁环40在运动过程中的磁场，并形成运动磁场曲线。通过分析至少两个运动磁场曲线的关系来判断驱动转子60的运动情况。具体的，根据不同运动磁场曲线的相位差和/或周期以确定驱动转子60的运动情况时，驱动转子60的运动情况至少包括驱动转子60是否转动、驱动转子60处于上升阶段、驱动转子60处于下降阶段。由于驱动转子60在处于上升阶段和处于下降阶段时的转动方向不同，进而使得两个运动磁场曲线的相位差是相反的。所以可以根据相位差来判断驱动转子60是处于上升阶段还是处于下降阶段。由于驱动转子60是匀速转动的，所以霍尔传感器50采集到的感应磁环40的运动磁场曲线是规律的，在驱动转子60不再转动或不再匀速转动时，感应磁环40的运动磁场曲线的周期则就发生了改变，通过观察运动磁场曲线的周期来判断感应磁环是否发生了堵转。
具体的，根据不同运动磁场曲线的相位差和/或周期以确定驱动转子60的运动情况时，根据不同运动磁场曲线的相位差以确定驱动转子60处于上升阶段或下降阶段；根据不同运动磁场曲线的周期以确定驱动转子60是否转动。
需要说明的是，由于驱动转子60在处于上升阶段和处于下降阶段时的转动方向不同，进而使得两个运动磁场曲线的相位差是相反的。在进行设计电子膨胀阀时，需要给哪条曲线在前时是上升阶段还是下降阶段。或者给定两条运动曲线的相位差的正负对应的是上升阶段还是下降阶段等，以用于判断驱动转子60处于上升阶段还是下降阶段。
由于驱动转子60是匀速转动的，所以霍尔传感器50采集到的感应磁环40的运动磁场曲线是规律的，在驱动转子60不再转动或不再匀速转动时，驱动转子60的运动磁场曲线的周期则就发生了改变，通过观察运动磁场曲线的周期来判断感应磁环是否发生了堵转。在设计电子膨胀阀时，预先采集感应磁环40正常运动时的运动磁场曲线的周期。在电子膨胀阀工作的过程中，若运动磁场曲线的周期小于感应磁环40正常运动时的运动磁场曲线的周期，则电子膨胀阀发生堵转。
以两个霍尔传感器50为例，霍尔传感器50为两个，在根据不同运动磁场曲线的相位差和/或周期以确定驱动转子60的运动情况时，若两条运动磁场曲线的相位差为正，则确定驱动 转子60处于上升阶段；若两条运动磁场曲线的相位差为负，则确定驱动转子60处于下降阶段。标定一个霍尔传感器50为第一个霍尔传感器，则另一个霍尔传感器50为第二个霍尔传感器，相位差为第一个霍尔传感器的运动磁场曲线减去第二个霍尔传感器的运动磁场曲线。当两条运动磁场曲线的相位差为正，则确定驱动转子60处于上升阶段，当两条运动磁场曲线的相位差为负，则确定驱动转子60处于下降阶段。这样就可以根据两条运动磁场曲线的限位差的正负来判断驱动转子60是处于上升阶段还是下降阶段的。
如图5、图6所示的具体实施例中，实线为第一个霍尔传感器50的运动磁场曲线，虚线为第二个霍尔传感器50的运动磁场曲线。如图5所示，驱动转子60正向转动时，实线是领先虚线的，相位差为正。如图6所示，驱动转子60反向转动时，虚线是领先实线的，相位差为负。
如图7、图8所示的具体实施例中，霍尔传感器50的运动磁场曲线为方波，实线为第一个霍尔传感器50的运动磁场曲线，虚线为第二个霍尔传感器50的运动磁场曲线。如图7所示，驱动转子60正向转动时，实线是领先虚线的，相位差为正。如图8所示，驱动转子60反向转动时，虚线是领先实线的，相位差为负。
当然，霍尔传感器50的数量也可以是至少两个，可以仅参考两个霍尔传感器50运动磁场曲线的相位差，也可以参考至少两个霍尔传感器50运动磁场曲线的相位差。
如图3和图4所示，相邻两个霍尔传感器50的感应部的中心和感应磁环40的中心在容置腔20的高度方向的投影之间的夹角X、感应磁环40的磁极数n之间满足：
X＝N*(360/n)+(360/2/n)                                            公式(1)
其中，夹角X的单位为度；N为整数。
根据感应磁环的磁极数n来确定相邻两个霍尔传感器50之间的夹角，同时也能计算出可以放置多少个霍尔传感器50。这样设置能够准确通过运动磁场曲线来判断感应磁环的运动情况。
具体的，至少两个霍尔传感器50与感应磁环40之间的距离相同。这样设置使得每个霍尔传感器50采集到的感应磁环40的磁场的强度是相同的，而至少两个运动磁场曲线的峰值和周期是相同的，便于通过至少两个运动磁场曲线来判断驱动转子60的运动情况。
如图3和图4所示，相邻两个霍尔传感器50的感应部的中心的距离L、感应磁环40的磁极数n和霍尔传感器50的中心到感应磁环40的中心在容置腔20的高度方向的投影距离r之间满足：
L＝2*r*sin[(2*N+1)*π/(2*n)]                                    公式(2)
其中，距离L的单位为厘米，投影距离r的单位为厘米。
当然，距离L和投影距离r是长度单位即可。距离L和投影距离r的单位也可以是毫米、米等长度单位。
在感应磁环40的磁极数n确定的情况下，距离L与投影距离r之间是一次函数。
相邻两个霍尔传感器50的感应部的中心的距离L与感应磁环40的磁极数n和霍尔传感器50的中心到感应磁环40的中心在容置腔20的高度方向的投影距离r有关，不同的感应磁环40的磁极数n中，设计的相邻的两个霍尔传感器50的感应部的中心的距离L不同。
电子膨胀阀还包括线圈组件、阀体组件、套筒，线圈组件设置在架体10内且位于驱动转子60外侧，阀体组件包括阀座和阀针，阀针随驱动转子60运动开闭阀座上的阀口，套筒设置在容置腔20内且与阀体组件固定连接，套筒具有空腔，驱动转子60在套筒内运动。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (16)

  1. 一种电子膨胀阀，其特征在于，包括：
    架体(10)，所述架体(10)具有容置腔(20)和安装腔(30)；
    感应磁环(40)，所述感应磁环(40)沿所述容置腔(20)的高度方向可移动地设置在所述容置腔(20)内，所述安装腔(30)至少位于所述感应磁环(40)所在所述容置腔(20)的活动区域的周向外侧；
    霍尔传感器(50)，所述霍尔传感器(50)为至少两个，至少两个所述霍尔传感器(50)位于所述安装腔(30)内并绕所述容置腔(20)的周侧设置，至少两个所述霍尔传感器(50)位于同一高度处，所述感应磁环(40)始终处于所述霍尔传感器(50)的检测范围内。
  2. 根据权利要求1所述的电子膨胀阀，其特征在于，相邻两个所述霍尔传感器(50)的感应部的中心和所述感应磁环(40)的中心在所述容置腔(20)的高度方向的投影之间的夹角X、所述感应磁环(40)的磁极数n之间满足：
    X＝N*(360/n)+(360/2/n)  公式(1)
    其中，夹角X的单位为度；N为整数。
  3. 根据权利要求1所述的电子膨胀阀，其特征在于，至少两个所述霍尔传感器(50)与所述感应磁环(40)之间的距离相同。
  4. 根据权利要求3所述的电子膨胀阀，其特征在于，相邻两个所述霍尔传感器(50)的感应部的中心的距离L、所述感应磁环(40)的磁极数n和所述霍尔传感器(50)的中心到所述感应磁环(40)的中心在所述容置腔(20)的高度方向的投影距离r之间满足：
    L＝2*r*sin[(2*N+1)*π/(2*n)]  公式(2)。
  5. 根据权利要求1至4中任一项所述的电子膨胀阀，其特征在于，所述感应磁环(40)具有上升位和下降位，所述感应磁环(40)的周向侧壁包括感应面段(41)，所述感应面段(41)与所述容置腔(20)的内侧壁之间的距离在所述容置腔(20)的高度方向上不变，
    所述感应磁环(40)位于下降位时，所述感应面段(41)的顶部侧向所述霍尔传感器(50)的投影位于所述霍尔传感器(50)的感应部内；
    所述感应磁环(40)位于上升位时，所述感应面段(41)的底部侧向所述霍尔传感器(50)的投影位于所述霍尔传感器(50)的感应部内。
  6. 根据权利要求5所述的电子膨胀阀，其特征在于，所述感应磁环(40)的周向侧壁还包括位于所述感应面段(41)上方的上部保护面段(42)和位于所述感应面段(41)下方的下部保护面段(43)，所述上部保护面段(42)与所述感应磁环(40)的顶面圆弧过渡，所述下部保护面段(43)与所述感应磁环(40)的底面圆弧过渡。
  7. 根据权利要求5所述的电子膨胀阀，其特征在于，所述感应面段(41)的高度大于所述感应磁环(40)在所述容置腔(20)的高度方向上的运动行程。
  8. 根据权利要求1至4中任一项所述的电子膨胀阀，其特征在于，所述电子膨胀阀还包括驱动转子(60)，所述驱动转子(60)设置在所述容置腔(20)内，且所述感应磁环(40)设置在所述驱动转子(60)靠近所述安装腔(30)的一侧，所述驱动转子(60)驱动所述感应磁环(40)转动，所述驱动转子(60)与所述感应磁环(40)的磁极数相同。
  9. 根据权利要求1至4中任一项所述的电子膨胀阀，其特征在于，所述霍尔传感器(50)贴合设置在所述容置腔(20)的外侧壁上。
  10. 根据权利要求9所述的电子膨胀阀，其特征在于，所述电子膨胀阀还包括至少两个固定架，所述霍尔传感器(50)通过所述固定架贴合在所述容置腔(20)的外侧壁上，且至少两个所述固定架与至少两个所述霍尔传感器(50)一一对应贴合设置，以将所述霍尔传感器(50)限位在所述容置腔(20)的外侧壁与所述固定架之间。
  11. 一种用于电子膨胀阀的监测方法，其特征在于，所述电子膨胀阀具有驱动所述电子膨胀阀的感应磁环(40)转动的驱动转子(60)和至少两个用于监测所述感应磁环(40)的霍尔传感器(50)，至少两个所述霍尔传感器(50)绕所述感应磁环(40)的周侧间隔设置，所述用于电子膨胀阀的监测方法包括：
    各所述霍尔传感器(50)分别同时采集所述感应磁环(40)的运动情况，以形成运动磁场曲线；
    将不同的所述霍尔传感器(50)采集的所述运动磁场曲线进行比较；
    根据不同的所述运动磁场曲线的相位差以确定所述驱动转子(60)的运动情况；或者根据不同的所述运动磁场曲线的相位差周期以确定所述驱动转子(60)的运动情况；或者根据不同的所述运动磁场曲线的相位差和周期以确定所述驱动转子(60)的运动情况。
  12. 根据权利要求11所述的用于电子膨胀阀的监测方法，其特征在于，
    根据不同所述运动磁场曲线的相位差以确定所述驱动转子(60)的运动情况时，所述驱动转子(60)的运动情况至少包括驱动转子(60)是否转动、所述驱动转子(60)处于上升阶段、所述驱动转子(60)处于下降阶段；或者
    根据不同所述运动磁场曲线的周期以确定所述驱动转子(60)的运动情况时，所述驱动转子(60)的运动情况至少包括驱动转子(60)是否转动、所述驱动转子(60)处于上升阶段、所述驱动转子(60)处于下降阶段；或者
    根据不同所述运动磁场曲线的相位差和周期以确定所述驱动转子(60)的运动情况时，所述驱动转子(60)的运动情况至少包括驱动转子(60)是否转动、所述驱动转子 (60)处于上升阶段、所述驱动转子(60)处于下降阶段。
  13. 根据权利要求12所述的用于电子膨胀阀的监测方法，其特征在于，根据不同所述运动磁场曲线的相位差和周期以确定所述驱动转子(60)的运动情况时，
    根据不同所述运动磁场曲线的相位差以确定所述驱动转子(60)处于上升阶段或下降阶段；根据不同所述运动磁场曲线的周期以确定所述驱动转子(60)是否转动。
  14. 根据权利要求13所述的用于电子膨胀阀的监测方法，其特征在于，所述电子膨胀阀具有容置腔(20)和安装腔(30)，所述感应磁环(40)沿所述容置腔(20)的高度方向可移动地设置在所述容置腔(20)内，所述安装腔(30)至少位于所述感应磁环(40)所在所述容置腔(20)的活动区域的周向外侧；至少两个所述霍尔传感器(50)位于所述安装腔(30)内并绕所述容置腔(20)的周侧设置，相邻两个所述霍尔传感器(50)的感应部的中心和所述感应磁环(40)的中心在所述容置腔(20)的高度方向的投影之间的夹角X、所述感应磁环(40)的磁极数n之间满足：
    X＝N*(360/n)+(360/2/n)  公式(1)
    其中，夹角X的单位为度；N为整数。
  15. 根据权利要求14所述的用于电子膨胀阀的监测方法，其特征在于，至少两个所述霍尔传感器(50)与所述感应磁环(40)之间的距离相同。
  16. 根据权利要求15所述的用于电子膨胀阀的监测方法，其特征在于，相邻两个所述霍尔传感器(50)的感应部的中心的距离L、所述感应磁环(40)的磁极数n和所述霍尔传感器(50)的中心到所述感应磁环(40)的中心在所述容置腔(20)的高度方向的投影距离r之间满足：
    L＝2*r*sin[(2*N+1)*π/(2*n)]  公式(2)。
PCT/CN2021/127139 2020-11-10 2021-10-28 电子膨胀阀和用于电子膨胀阀的监测方法 Ceased WO2022100450A1 (zh)

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