CN103672131A - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
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- CN103672131A CN103672131A CN201210327242.2A CN201210327242A CN103672131A CN 103672131 A CN103672131 A CN 103672131A CN 201210327242 A CN201210327242 A CN 201210327242A CN 103672131 A CN103672131 A CN 103672131A
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- stop bit
- electric expansion
- axle
- rotation
- expansion valve
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- 230000007246 mechanism Effects 0.000 claims abstract description 82
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 73
- 229910052742 iron Inorganic materials 0.000 claims description 35
- 230000033001 locomotion Effects 0.000 claims description 18
- 239000012530 fluid Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 206010044565 Tremor Diseases 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
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Classifications
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- 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
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- 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
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention relates to an electronic expansion valve, comprising: a valve assembly including a movable valve member; an actuator including a spindle, an abutment, and an anti-rotation lock, the spindle being threadedly engaged with the anti-rotation lock, the movable valve member being disposed at the anti-rotation lock, the abutment receiving the anti-rotation lock such that the anti-rotation lock together with the movable valve member is axially movable but not rotationally movable relative to the abutment when the spindle is rotated; and a drive mechanism for powering the actuator. The electronic expansion valve also comprises a stop mechanism. The stop mechanism comprises a first stop piece and a second stop piece, the first stop piece can rotate integrally with the mandrel, and the second stop piece can translate along the axial direction along with the rotation of the mandrel, so that the first stop piece and the second stop piece can be abutted to each other to limit the rotation range of the mandrel. According to the invention, the vertical translation of the valve needle is realized, and meanwhile, the rotation stop of the rotor and the mandrel is realized to avoid the seizure and the locking of the thread pair caused by the over-rotation of the thread pair.
Description
Technical field
The present invention relates to a kind of electric expansion valve.
Background technique
Electric expansion valve is the vitals in cooling/heating system, is mainly used in the flow of refrigerant fluid to regulate.Traditional electric expansion valve generally adopts stepper motor to control, and conventionally driving mechanism (stepper motor), actuator (thread screw mechanism), throttle mechanism (needle valve seat) and relevant assisting agency, consists of.
Yet on the one hand, in traditional electric expansion valve, needle axial direction along electric expansion valve in the situation that of rotation moves up and down, this can cause needle to produce transverse shakiness in the process moving up and down, and then can cause needle to engage with the bad of valve seat.And needle moves up and down the end (lower end) that also can cause needle and valve seat and produces wearing and tearing because of relative rotation therebetween in rotation in the situation that.
On the other hand, in traditional electric expansion valve, for example, in the standard-sized sheet and complete shut-down position of valve, can produce because of rotor overwinding then the screw pair causing is killed problem, thereby be difficult to guarantee the smooth transmission of screw pair.
Here, it should be pointed out that the technology contents providing in this part is intended to contribute to those skilled in the art's the understanding of the present invention, and not necessarily form prior art.
Summary of the invention
Total summary of the present invention is provided in this part, rather than characteristic comprehensive the disclosing of the complete scope of the present invention or the present invention institute.
An object of one or more mode of executions of the present invention is to provide a kind ofly to be guaranteed the good bond of needle and valve seat and avoids needle and valve seat produces the electric expansion valve of wearing and tearing because of relative rotation therebetween.
Another object of one or more mode of executions of the present invention is to provide a kind of avoid because of rotor and axle overwinding then the screw pair causing is killed the electric expansion valve with wear problem.
The another object of one or more mode of executions of the present invention is to provide and a kind ofly can realizes the electric expansion valve of automatically closing the function of electric expansion valve when power-off.
An object again of one or more mode of executions of the present invention is to provide a kind of rotation stop bit of realizing rotor and axle when realizing needle upper and lower translation to avoid because of screw pair overwinding then causes the stuck electric expansion valve of screw pair interlock.
One or more to achieve these goals, according to the present invention, provide a kind of electric expansion valve, comprising: valve assembly, and described valve assembly comprises movable valve member and for regulating flowing through the flow of the fluid of described electric expansion valve; Actuator, described actuator comprises axle, supporting element and anti-rotation latch and for driving described movable valve member to carry out axial motion, described axle engages with the threaded one end of described anti-rotation latch, described movable valve member is arranged at the other end of described anti-rotation latch, described supporting element receives at least a portion of described anti-rotation latch, make when described axle rotation described in anti-rotation latch together with described movable valve member, can carry out axial motion with respect to described supporting element and still can not be rotated; And driving mechanism, described driving mechanism is used to described actuator that power is provided.Described electric expansion valve also comprises stop bit mechanism.Described stop bit mechanism comprises the first stop bit part and the second stop bit part, described the first stop bit part can rotate integratedly with described axle, described the second stop bit part can the translation vertically along with the rotation of described axle, thus make described the first stop bit part and described the second stop bit part mutually butt to limit the scope of the rotation of described axle.
According to one or more mode of executions of the present invention, owing to adopting anti-rotation design, avoided needle to produce transverse shakiness in the process moving up and down, and then guarantee the good bond of needle and valve seat, and the end (lower end) of having avoided needle and valve seat produce wearing and tearing because of relative rotation therebetween.
According to one or more mode of executions of the present invention, owing to being provided with stop bit mechanism, avoided because of rotor and axle overwinding then the screw pair causing is killed and wear problem, thereby guaranteed the smooth transmission of screw pair.
According to one or more mode of executions of the present invention, owing to being provided with electromagnetism retaining mechanism, therefore can realize the function of automatically closing electric expansion valve when power-off.
Especially, according to one or more mode of executions of the present invention, when realizing needle upper and lower translation, the rotation stop bit of realizing rotor and axle is to avoid because of screw pair overwinding then cause screw pair interlock stuck.
Accompanying drawing explanation
By the description referring to accompanying drawing, it is easier to understand that the feature and advantage of one or several mode of execution of the present invention will become, in the accompanying drawings:
Fig. 1 is according to the longitudinal sectional view of the electric expansion valve in full-gear of first embodiment of the invention;
Fig. 2 is according to the longitudinal sectional view of the electric expansion valve in complete shut-down state of first embodiment of the invention;
Fig. 3 is according to the critical piece of the electric expansion valve of the first embodiment of the invention assembled state stereogram of (comprising stop bit mechanism, axle, lower support element, anti-rotation latch, needle);
Fig. 4 is according to the critical piece of the electric expansion valve of the first embodiment of the invention assembled state longitudinal sectional view of (comprising stop bit mechanism, axle, lower support element, anti-rotation latch, needle);
Fig. 5 is according to the stereogram of the anti-rotation latch of first embodiment of the invention;
Fig. 6 is according to the stereogram of the spring helical guideway of first embodiment of the invention;
Fig. 7 is according to the stereogram of the slip ring of first embodiment of the invention;
Fig. 8 is the stereogram illustrating according to the modification of the stop bit mechanism of first embodiment of the invention;
Fig. 9 is according to the critical piece of the electric expansion valve of the second embodiment of the invention assembled state stereogram of (comprising stop bit mechanism, axle, lower support element, anti-rotation latch, needle);
Figure 10 is according to the critical piece of the electric expansion valve of the second embodiment of the invention assembled state longitudinal sectional view of (comprising stop bit mechanism, axle, lower support element, anti-rotation latch, needle);
Figure 11 is according to the stereogram of the axle with rotation bit-stopping structure of second embodiment of the invention;
Figure 12 is according to the stereogram of the lower support element with guide structure of second embodiment of the invention; And
Figure 13 is according to the stereogram of the anti-rotation latch with rotation bit-stopping structure of second embodiment of the invention.
Embodiment
By illustrative embodiments, describe the present invention with reference to the accompanying drawings.To following detailed description of the present invention, be only for demonstration object, and be never the restriction to the present invention and application or purposes.
First, with reference to Fig. 1 to Fig. 7, describe according to the structure of the electric expansion valve of first embodiment of the invention.Wherein, Fig. 1 is according to the longitudinal sectional view of the electric expansion valve in full-gear of first embodiment of the invention, Fig. 2 is according to the longitudinal sectional view of the electric expansion valve in complete shut-down state of first embodiment of the invention, Fig. 3 (comprises stop bit mechanism according to the critical piece of the electric expansion valve of first embodiment of the invention, axle, lower support element, anti-rotation latch, needle) assembled state stereogram, Fig. 4 (comprises stop bit mechanism according to the critical piece of the electric expansion valve of first embodiment of the invention, axle, lower support element, anti-rotation latch, needle) assembled state longitudinal sectional view, Fig. 5 is according to the stereogram of the anti-rotation latch of first embodiment of the invention, Fig. 6 is according to the stereogram of the spring helical guideway of first embodiment of the invention, and Fig. 7 is according to the stereogram of the slip ring of first embodiment of the invention.
According to the electric expansion valve 1 of first embodiment of the invention, can comprise: for the valve assembly 10 regulating flowing through the flow of the fluid of electric expansion valve 1; For the actuator 50 that drives the movable valve member (being needle) of valve assembly 10 to carry out axial motion; For actuator 50 provides the driving mechanism 40 of power; And for keeping and discharge the electromagnetism retaining mechanism 60 of actuator 50.
In preferred example, valve assembly 10 comprises valve body 12.The entrance 12-1 being connected with inflow pipe 92 and the outlet 12-2 being connected with outflow tube 94 are set in valve body 12.Fluid flows into electric expansion valve 1 via inflow pipe 92, then via outflow tube 94, flows out electric expansion valve 1.
In preferred example, at the outlet 12-2 place of valve body 12, standing valve member (being valve seat) 18 is set.
In preferred example, as mentioned above, the valve assembly 10 of electric expansion valve 1 also comprises needle 14.And, as mentioned above, under the drive of needle 14 actuator 50, carry out axial motion, thereby can open and close valve seat 18 and can regulate the valve opening of electric expansion valve 1.Needle 14 can comprise first end (upper end) 14-1 and the second end (lower end) 14-2.First end 14-1 is used for and below the second section of the anti-rotation latch 55 being described in detail (needle joining portion) 55-2 is engaged.Thereby the second end 14-2 is for engaging and close valve seat 18 with valve seat 18.
In preferred example, needle 14 also comprise around the second end 14-2 of needle 14, arrange can, against the seal ring 14-5 of the end face of valve seat 18, between needle 14 and valve seat 18, provide better sealing effect thus.
In some instances, can be in the valve pocket 12-5 of valve body 12 setting example if the filter screen (not shown) that is general cylindrical shape is to filter the impurity in the fluid that flows through electric expansion valve 1.
In some instances, can seal washer 32 be set to realize the sealing engagement between valve seat 18 and valve body 12 between valve seat 18 and valve body 12.
In illustrated example, driving mechanism 40 can be the motor 40 that comprises stator 41 and rotor 42.Rotor 42 can rotate in stator 41.In addition, can sleeve 44 be set between stator 41 and rotor 42 to realize the object of easy to assembly and easy sealing.
In preferred example, rotor 42 is embodied as the cylindric magnet ring of an end opening, thereby limits rotor chamber 42-1.Below the stop bit mechanism 57 being described in detail is arranged in rotor chamber 42-1 at least in part.
In addition, in preferred example, the axle 51 of rotor 42Yu actuator 50 is injection molded into one, thereby rotor 42 when driving mechanism (motor) 40 energising is rotated integratedly with axle 51.Yet, it will be appreciated by those skilled in the art that rotor 42 and axle 51 also can be individually formed, and then be permanently connected together by suitable mode.
In preferred example, actuator 50 comprises: axle 51 as mentioned above; Lower support element (as according to supporting element of the present invention) 53; And anti-rotation latch 55.
In some instances, axle 51 can comprise first end (upper end) 51-1 and the second end (lower end) 51-2.First end 51-1 is used for and below the moving iron 64 of the electromagnetism retaining mechanism 60 being described in detail is engaged.The second end 51-2 can be formed with outside thread.The second end (male end) 51-2 is used for and below the first section (internal thread part) 55-1 of the anti-rotation latch 55 being described in detail is threadedly engaged with, thereby axle 51 axial restraints and anti-rotation latch 55 circumferentially fixedly in the situation that the rotation by axle 51 force anti-rotation latch 55 to carry out axial motion together with needle 14, this respect will below be described further.
In illustrated example, can at the lower curtate place of axle 51,---above the vicinity of the second end 51-2 being specially in axle 51, locate---collar 51-4 is set.Collar 51-4 for below by the first section (sliding supporting part) 53-1 slip joint of the lower support element being described in detail 53, thereby guiding axle 51 rotatablely moving and axial motion with respect to lower support element 53.
In preferred example, lower support element 53 comprises: the first section (sliding supporting part) 53-1 as mentioned above; And second section (anti-rotary part) 53-2.In the first section 53-1, can form through hole, this through hole can have round-shaped.Thus, the first section 53-1 slidably holds the collar 51-4 of axle 51 by its manhole, thus guiding the rotatablely moving and axial motion of axle 51 so that axle 51 rotatablely move and axial motion more steady.In the second section 53-2, can form non-circular or polygonal through hole, but this through hole is for holding below the first section 55-1 of the anti-rotation latch 55 being described further, thereby makes the first section 55-1 of anti-rotation latch 55 can in the second section 53-2 of lower support element 53, carry out axial motion can not be rotated around its axis.For example, the through hole of the second section 53-2 can be Octagon, and in other words, the through hole of the second section 53-2 can have week in Octagon.
In preferred example, as Fig. 5 is clearly shown that, anti-rotation latch 55 comprises: the first section (internal thread part) 55-1 as mentioned above; And second section (needle joining portion) 55-2.In the first section 55-1, can form hole---through hole for example, this through hole can have round-shaped, and can form internal thread in this through hole.Thus, the first section 55-1 of anti-rotation latch 55 is threadedly engaged with by the second end 51-2 of its internal thread and axle 51, thereby axle 51 axial restraints and anti-rotation latch 55 circumferentially fixedly in the situation that the rotation by axle 51 force anti-rotation latch 55 to carry out axial motion together with needle 14, to realize opening, close and the adjusting of valve opening of electric expansion valve 1.In addition, the first section 55-1 of anti-rotation latch 55 can have the non-circular or polygonal periphery matching in week in the non-circular or polygonal with the through hole of the second section (anti-rotary part) 53-2 of lower support element 53.For example, as shown in Figure 5, the first section 55-1 can have Octagon periphery.
Thus, by in the non-circular or polygonal of the through hole of the second section 53-2 of lower support element 53 week structure and the non-circular or polygonal peripheral configuration of the first section 55-1 of anti-rotation latch 55, anti-rotation latch 55 can only carry out axial translation motion and can not be rotated with respect to lower support element 53 together with the needle 14 engaging with anti-rotation latch 55.
Here, those skilled in the art are to be understood that, the structure of the second section 53-2 of lower support element 53 and the first section 55-1 of anti-rotation latch 55 is not limited to this, but can be for allowing the sliding movement between lower support element 53 and anti-rotation latch 55 still not allow to carry out betwixt any structure of relative rotary motion.For example, the through hole of the second section 53-2 of lower support element 53 can have circular interior perimeter surface, but in perimeter surface, forms keyway or key within it.Meanwhile, the first section 55-1 of anti-rotation latch 55 can have circular outer peripheral surface, key or keyway that still on its outer surface, the keyway in the second section 53-2 of formation and lower support element 53 or key match.
The second section 55-2 of anti-rotation latch 55 is for engaging with the first end 14-1 of needle 14.In some instances, retaining ring 36 can be set at the lower end of the second section 55-2.Retaining ring 36 is by interacting and needle 14 is held in to anti-rotation latch 55 with the radially outstanding head 14-4 that is formed on its first end 14-1 place of needle 14.
In some instances, needle 14 can be engaged in the second section 55-2 of anti-rotation latch 55 regularly.
In other example, alternately, needle 14 can be sliding engaged to the second section 55-2 in anti-rotation latch 55.Particularly, in the second section 55-2, form hole---through hole for example, the internal diameter of this through hole is greater than the internal diameter of the through hole of the first section 55-1, thus in the inner side of anti-rotation latch 55, roughly between the first section 55-1 and the second section 55-2, form in stepped part (sign).Compress Spring (the first Compress Spring) 38 is set between interior stepped part and the first end 14-1 of needle 14.Thus, needle 14 can move axially together with anti-rotation latch 55.And; when anti-rotation latch 55 moves down and when needle 14 is during with valve seat 18 butt; Compress Spring 38 from the first end 14-1 of needle 14 apply spring force so that between needle 14 and valve seat 18, have suitable for power; thereby on the one hand because of have contact cushion protect needle 14 and valve seat 18 not damaged, reliable sealing effect is provided on the other hand.
In some instances, as Fig. 5 is clearly shown that, stepped part 55-4 outside can forming in the outside of anti-rotation latch 55, between the first section (internal thread part) 55-1 and the second section (needle joining portion) 55-2.Compress Spring (the second Compress Spring) 39 can be set between stepped part 55-4 and lower support element 53 outside.Compress Spring 39 can provide downward spring force for anti-rotation latch 55, with the electric expansion valve power-off in the situation that, auxiliary anti-rotation latch 55 moves to and makes needle 14 close the position of valve seat 18 together with needle 14, axle 51, rotor 42 and moving iron 64.Yet, it will be appreciated by those skilled in the art that because anti-rotation latch 55, needle 14, axle 51, rotor 42 and moving iron 64 itself have certain weight so that this power moving down to be provided, so Compress Spring 39 can be omitted.
In preferred example, electromagnetism retaining mechanism 60 is arranged on actuator 50 tops, and the central axis of electromagnetism retaining mechanism 60 can be arranged to roughly overlap with the spin axis of axle 51.
In preferred example, electromagnetism retaining mechanism 60 comprises: the electromagnetic coil 61 that produces magnetic force when energising; With respect to electromagnetic coil 61 fixing determine iron 62; And as mentioned above can be with respect to the moving iron 64 of determining iron 62 and moving.In addition, for easy to assembly, can be in electromagnetic coil 61 setting example as being the sleeve 65 of general cylindrical shape.Determining iron 62 can be fixed in the upper end of sleeve 65.Moving iron 64 can slide in sleeve 65.In addition, can be in the arranged outside yoke 67 of electromagnetic coil 61.Yoke 67 can strengthen the magnetic force of electromagnetism retaining mechanism 60 on the one hand, on the other hand can be as the fixed support of electric expansion valve 1.
In preferred example, the first end (upper end) of moving iron 64 and axle 51 but 51-1 can not axially movable mode engage with rotatable.
In illustrated example, receiving hole (not indicating) can be set in the lower end of moving iron 64, and the first end 51-1 of axle 51 can insert in this receiving hole.In addition, by suitable bearing and suitable bearing limit position part are set between moving iron 64 and the first end 51-1 of axle 51, axle 51 can, with respect to moving iron 64 rotations, still can not be moved and can only carry out one axial motion with moving iron 64 with respect to moving iron 64 vertically.In other words, moving iron 64 can not rotate, and this is conducive to moving iron 64 and determines the reliable magnetic attracting between iron 62.
According to first embodiment of the invention, stop bit mechanism 57 is set in actuator 50.
In preferred example, stop bit mechanism 57 is arranged in the rotor chamber 42-1 of cylindric rotor 42 at least in part.In this way, can reduce the whole axial dimension of electric expansion valve 1.
In preferred example, stop bit mechanism 57 comprises: spring helical guideway 57-1; And slip ring 57-3.In the first embodiment, spring helical guideway 57-1 is used as according to the first stop bit part of the present invention (being rotatable stop bit part), and slip ring 57-3 is used as according to the second stop bit part of the present invention (getting final product translation stop bit part).
In some instances, spring helical guideway 57-1 can be formed on by injection moulding together with axle 51 and rotor magnetic ring the periphery of axle 51.In other example, spring helical guideway 51 can be individually formed, and then for example, by suitable mode (machinery is fixedly connected with mode), is fixedly attached to the periphery of axle 51.Thus, realize the reliable assembling of spring helical guideway 57-1.
In illustrated example, spring helical guideway 57-1 can be at the centre portion place of axle 51, between the first end 51-1 of axle and the second end 51-2, around axle 51, arrange.
In preferred example, as Fig. 6 is clearly shown that, spring helical guideway 57-1 comprises: the 57-11 of helical guideway portion, and the 57-11 of helical guideway portion is used for supporting slip ring 57-3; First end (upper end) 57-12, first end 57-12 is as upper position-arresting portion; And second end (lower end) 57-13, the second end 57-13 is as lower position-arresting portion.
In preferred example, as Fig. 7 is clearly shown that, slip ring 57-3 comprises: Spiral Notebook body 57-31; And extension 57-32.Spiral Notebook body 57-31 has the helical configuration that the helical configuration with the 57-11 of helical guideway portion matches, and makes Spiral Notebook body 57-31 can be supported on the 57-11 of helical guideway portion and make can realize relative sliding between the two at Spiral Notebook body 57-31 and the 57-11 of helical guideway portion.
In preferred example, stop bit mechanism 57 also comprises guiding element 57-5.Guiding element 57-5 is used as according to guiding element of the present invention.
In illustrated example, guiding element 57-5 may be embodied as two guide rod 57-51.Guide rod 57-51 can for example vertically extend upward from the upper-end surface of the first section 53-1 of lower support element 53.Two guide rod 57-51 are arranged in and limit gap (not indicating) therebetween.The free end 57-322 of the extension 57-32 of slip ring 57-3 is preferably contained in this gap in the mode of slip joint.
In other example, alternately, guiding element may be embodied as single guide rod.In this case, when slip ring 57-3 is forced upwardly translation, thereby the free end 57-322 of extension 57-32 can be with a side contacts of guide rod along guide rod axial translation, and when slip ring 57-3 is forced to downward translation, thereby the free end 57-322 of extension 57-32 can contact along guide rod axial translation with the opposite side of guide rod at slip ring 57-3 after the about circle of axle 51 rotations.
Thus, for example, when axle 51 is when fixing axial position (the first axial position) rotates, spring helical guideway 57-1 and axle 51 are rotated integratedly.Now, because the free end 57-322 of the extension 57-32 of slip ring 57-3 is contained in the gap of guide rod 57-51, slip ring 57-3 can not be rotated, so the rotation of spring helical guideway 57-1 force slip ring 57-3 upper and lower translation vertically.So, the 57-12 of upper position-arresting portion and the 57-13 of the lower position-arresting portion butt of the spring helical guideway 57-1 that the slip ring 57-3 of upper and lower translation can rotate with the axial position fixing vertically, thus realize the rotation stop bit of axle 51 and then whole actuator 50.
To describe according to the working procedure of the electric expansion valve 1 of first embodiment of the invention below.
From electric expansion valve 1, in state as shown in Figure 1, start to be described.In Fig. 1, electromagnetism retaining mechanism 60 is executed electricity, thereby moving iron 62 is together with determining iron 64 magnetic attracting, thus axle 51 and then whole actuator 50 is remained on to the first axial position.Meanwhile, in Fig. 1, slip ring 57-3 is in upper position-arresting position (that is, the 57-12 of the upper position-arresting portion butt of slip ring 57-3 and spring helical guideway 57-1).Accordingly, axle 51 is in the first rotation stop bit position, and needle 14 is in fully open position.Here, it will be appreciated by those skilled in the art that also electric expansion valve 1 can be designed to when slip ring 57-3 during in lower position-arresting position needle 14 in fully open position.
Then, when closing electric expansion valve 1 while maybe needing to regulate the valve opening of electric expansion valve 1, to driving mechanism 40, execute electricity, rotor 42 is rotated along first direction.Thereby the rotation of rotor 42 causes axle 51 also along first direction rotation, to move away the first rotation stop bit position.Along with axle 51 is rotated along first direction in the first axial positions, the anti-rotation latch 55 that the second end 51-2 of its first section (internal thread part) 55-1 and axle 51 is threadedly engaged with is forced to downward translation.Now, be held in needle 14 translation downwards along with the downward translation of anti-rotation latch 55 of the second section (needle joining portion) 55-2 of anti-rotation latch 55.Thus, can only suitably reduce the valve opening of electric expansion valve 1, also can be by making the second end 14-2 and valve seat 18 butts of needle 14 make electric expansion valve 1 close (as shown in Figure 2) completely, this depends on the specific control (for example, by the rotation of motor 40 is controlled, electric expansion valve 1 being carried out to specific control) that electric expansion valve 1 is carried out.
Meanwhile, along with axle 51 is rotated along first direction in the first axial positions, the spring helical guideway 57-1 that forms as one or be permanently connected with axle 51 also rotates along first direction.The rotation of spring helical guideway 57-1 forces slip ring 57-3 translation downwards vertically.Slip ring 57-3 can be vertically translation downwards until the abutment end 57-311 of the Spiral Notebook body 57-31 of slip ring 57-3 and the 57-13 of the lower position-arresting portion butt of spring helical guideway 57-1 and in lower position-arresting position, as shown in Figure 2.Now, accordingly, axle 51 is in the second rotation stop bit position.
According to first embodiment of the invention, preferably, electric expansion valve 1 is designed to when slip ring 57-3 is during in lower position-arresting position, the second end 14-2 of needle 14 and valve seat 18 butts and the first Compress Spring 38 from the first end 14-1 of needle 14 apply suitable spring force so that between needle 14 and valve seat 18, have suitable for power, but the first Compress Spring 38 is not yet compressed into and reaches its minimum axial length.Thus, can provide on the one hand sealing reliably between needle 14 and valve seat, can prevent on the other hand screw pair (being the second end 51-2 of axle 51 and the internal thread part 55-1 of anti-rotation latch 55) because of overwinding then kill.
Then, from the state shown in Fig. 2, when needs are opened electric expansion valve 1, to driving mechanism 40, execute electricity, make rotor 42 along the second direction rotation contrary with first direction.Thereby the rotation of rotor 42 causes axle 51 also along second direction rotation, to move away the second rotation stop bit position.Along with axle 51 is rotated along second direction in the first axial positions, the anti-rotation latch 55 that the second end 51-2 of its first section (internal thread part) 55-1 and axle 51 is threadedly engaged with is forced upwardly translation.Then, be held in the needle 14 of the second section (needle joining portion) 55-2 of anti-rotation latch 55 along with the upwards translation of anti-rotation latch 55 translation that also will make progress, thereby can open electric expansion valve 1.In this respect, can only suitably increase the valve opening of electric expansion valve 1, also can make electric expansion valve 1 open (that is, make needle 14 in fully open position, as shown in Figure 1) completely.
Meanwhile, along with axle 51 is rotated along second direction in the first axial positions, the spring helical guideway 57-1 that forms as one or be permanently connected with axle 51 also rotates along second direction.Spring helical guideway 57-1 forces slip ring 57-3 upwards translation vertically along the rotation of second direction.Slip ring 57-3 can make progress translation vertically until the 57-12 of the upper position-arresting portion butt of the extension 57-32 of slip ring 57-3 and spring helical guideway 57-1 and again in upper position-arresting position, as shown in Figure 1.Now, accordingly, axle 51 is back to the first rotation stop bit position.
In addition, when the 1 unexpected accident power-off of electric expansion valve under the state shown in Fig. 1, due to electromagnetic coil 61 power-off of electromagnetism retaining mechanism 60, determine iron 62 and no longer attract moving iron 64.Thus, moving iron 64, axle 51, rotor 42, anti-rotation latch 55 and needle 14 as a unit jointly under Action of Gravity Field and/or be arranged under the effect of spring force of the Compress Spring 39 between lower support element 53 and the outer stepped part 55-4 of anti-rotation latch 55 and fall downwards so that needle 14 is closed valve seat 18.
According to first embodiment of the invention, at least can provide following beneficial effect.
(1) according to first embodiment of the invention, due to adopt anti-rotation design (that is, be provided with anti-rotation latch and lower support element, and the structure of anti-rotation latch and lower support element makes anti-rotation latch to carry out axial translation motion and can not be rotated with respect to lower support element), therefore the needle engaging with anti-rotation latch not in the situation that himself axis rotates the axial direction along electric expansion valve move up and down, this has been avoided needle to produce transverse shakiness in the process moving up and down, and then guarantee the good bond of needle and valve seat.And, because moving up and down the end (lower end) of also having avoided needle and valve seat not around the rotation of himself axis in the situation that, needle produces wearing and tearing because of relative rotation therebetween.
(2), according to first embodiment of the invention, owing to being provided with stop bit mechanism, therefore can suitably limit the rotation of axle.Thus, for example, in the standard-sized sheet and complete shut-down position of valve, avoided because of rotor and axle overwinding then the screw pair causing is killed and wear problem, thereby guaranteed the smooth transmission of screw pair.
(3) according to first embodiment of the invention, owing to being provided with electromagnetism retaining mechanism, while therefore making the unexpected power-off of electric expansion valve when system accident power-off, although the actuator being formed by thread screw mechanism can not mobile needle to close valve seat, but because the axle of the part as actuator is discharged by electromagnetism retaining mechanism, under its deadweight or under the effect of the bias force of other resilient member, fall back to and can make needle close the position of valve seat, therefore can close reliably electric expansion valve.Thus, can realize the function of automatically closing electric expansion valve when power-off.
Especially, according to first embodiment of the invention, when realizing needle upper and lower translation, the rotation stop bit of realizing rotor and axle is to avoid because of screw pair overwinding then cause screw pair interlock stuck.
According to the stop bit mechanism of first embodiment of the invention, can there are some modification.
For example, (Fig. 8 is the stereogram illustrating according to the modification of the stop bit mechanism of first embodiment of the invention) as shown in Figure 8, according to a kind of modification 57 of the stop bit mechanism of first embodiment of the invention ' in, the free end 57-322 ' of the extension 57-32 of slip ring 57-3 forms ring body (being preferably cirque body).In addition, guiding element 57-5 is embodied as single guide rod 57-51 ' (being preferably the guide rod with circular cross-section).Guide rod 57-51 ' can for example vertically extend upward from the upper-end surface of the first section 53-1 of lower support element 53.The ring body 57-322 ' of the extension 57-32 of slip ring 57-3 preferably in the mode of slip joint around guide rod 57-51 ' layout.According to the electric expansion valve that comprises this stop bit mechanism type changing of first embodiment of the invention, except effect as above (1), (2) and (3) can be provided, the structure also at least with guiding element is more simple and guiding element is more stable with coordinating of slip ring.
Again for example, guiding element may be embodied as and has for holding the single guide rod of free-ended vertical slip conduit of the extension of slip ring.According to the electric expansion valve that comprises this stop bit mechanism type changing of first embodiment of the invention, except effect as above (1), (2) and (3) can be provided, also at least there is the more simple advantage of structure of guiding element.
According to the electric expansion valve of first embodiment of the invention, can not comprise electromagnetism retaining mechanism 60.In this case, can the axle of actuator 50 51 be rotatably held in to fixing axial position by suitable axial limiting mechanism.According to the electric expansion valve that does not comprise electromagnetism retaining mechanism of first embodiment of the invention, at least can provide effect as above (1) and (2).
Next, with reference to Fig. 9 to Figure 13, describe according to the structure of the electric expansion valve of second embodiment of the invention.Wherein, Fig. 9 (comprises stop bit mechanism according to the critical piece of the electric expansion valve of second embodiment of the invention, axle, lower support element, anti-rotation latch, needle) assembled state stereogram, Figure 10 (comprises stop bit mechanism according to the critical piece of the electric expansion valve of second embodiment of the invention, axle, lower support element, anti-rotation latch, needle) assembled state longitudinal sectional view, Figure 11 is according to the stereogram of the axle with rotation bit-stopping structure of second embodiment of the invention, Figure 12 is according to the stereogram of the lower support element with guide structure of second embodiment of the invention, and Figure 13 is according to the stereogram of the anti-rotation latch with rotation bit-stopping structure of second embodiment of the invention.
In second embodiment of the invention, adopt the reference character identical with first embodiment of the invention to refer to identical parts, and will omit being repeated in this description these same parts.
The difference of the second mode of execution and the first mode of execution is the structure of stop bit mechanism.
According to second embodiment of the invention, the 57A of stop bit mechanism is set in actuator 50.
In preferred example, the 57A of stop bit mechanism is arranged in the rotor chamber 42-1 of cylindric rotor 42 at least in part.In this way, can reduce the whole axial dimension of electric expansion valve.
In preferred example, the 57A of stop bit mechanism comprises: the rotatable stop bit part 57-1A that is fixedly arranged at axle 51; And be fixedly arranged at anti-rotation latch 55 can translation stop bit part 57-3A.In the second mode of execution, rotatable stop bit part 57-1A is used as according to the first stop bit part of the present invention (being rotatable stop bit part), and can be used as according to the second stop bit part of the present invention (getting final product translation stop bit part) by translation stop bit part 57-3A.
In preferred example, rotatable stop bit part 57-1A comprise be arranged at axle 51 periphery, along upper convex portion (upper position-arresting portion) the 57-12A spaced apart suitable distance of axial direction, outwardly with respect to the outer periphery of axle 51 and lower protuberance (lower position-arresting portion) 57-13A of axle 51.
In some instances, upper convex portion 57-12A and lower protuberance 57-13A can be injection molded into one with axle 51.
In other example, upper convex portion 57-12A and lower protuberance 57-13A can be individually formed, and then for example, by suitable mode (machinery is fixedly connected with mode), are fixedly attached to the periphery of axle 51.
In the example of some, lower protuberance 57-13A can form from the collar 51-4 of axle 51 and extend upward (seeing Figure 11).In addition, can be in the periphery of axle 51, above collar 51-4, locate to arrange axle collar 51-5, and upper convex portion 57-12A can form from the axle collar 51-5 of axle 51 to downward-extension (seeing Figure 11).In this case, preferably, lower protuberance 57-13A forms its periphery and flushes with the periphery of collar 51-4, flushes, as shown in figure 11 and upper convex portion 57-12A forms its periphery with the periphery of axle collar 51-5.
In preferred example, as Figure 13 is clearly shown that, can comprise by translation stop bit part 57-3A: from the outwardly directed cantilever arm 57-36 of outer periphery of the upper end of the first section 55-1 of anti-rotation latch 55; The upwardly extending armstand 57-37 in outer end from cantilever arm 57-36; The abutting part 57-38 extending radially inwardly from the upper end of armstand 57-37; And from the periphery of the upper end of the first section 55-1 of anti-rotation latch 55, with cantilever arm 57-36 diametrically contraposition leading thread to outwardly directed additional cantilever arm 57-39.
In preferred example, stop bit mechanism 57 also comprises guide structure 57-5A.Guide structure 57-5A is used as according to guiding element of the present invention.
In illustrated example, guide structure 57-5A may be embodied as notch 57-56 and the additional notch 57-57 of the diametrically contraposition at the first section 53-1 place that is formed at lower support element (as according to supporting element of the present invention) 53.Notch 57-56 for hold and guide at least can translation stop bit part 57-3A cantilever arm 57-36, and additional notch 57-57 is used for holding and guide can translation stop bit part 57-3A additional cantilever arm 57-39.
Here, it will be appreciated by those skilled in the art that and can omit additional cantilever arm 57-39 and additional notch 57-57.In addition, it will be appreciated by those skilled in the art that cantilever arm 57-36 and additional cantilever arm 57-39 and notch 57-56 and additional notch 57-57 needn't arrange diametrically contraposition.
To simply describe according to the working procedure of the stop bit mechanism of the electric expansion valve of second embodiment of the invention below.
For example, when axle 51 is when fixing axial position (, the first axial position while being provided with electromagnetism retaining mechanism) rotates forward or backwards, the rotatable stop bit part 57-1A and the axle 51 that are fixedly arranged at axle 51 are rotated integratedly.Now, be fixedly arranged at anti-rotation latch 55 can translation stop bit part 57-3A along with the upper and lower translation motion of anti-rotation latch 55 in the guide structure 57-5A that is formed at lower support element 53 places upper and lower translation vertically.So, vertically upper and lower translation can translation stop bit part 57-3A abutting part 57-38 can with upper convex portion (upper position-arresting portion) 57-12A and lower protuberance (lower position-arresting portion) the 57-13A butt of the rotatable stop bit part 57-1A of axial position rotation fixing, thereby realize the rotation stop bit of axle 51 and then whole actuator 50.
Similarly, identical with the electric expansion valve according to first embodiment of the invention, according to the electric expansion valve of second embodiment of the invention, at least can provide effect (1), (2) and (3) etc.
In a word, in electric expansion valve according to the present invention, can comprise following favourable scheme.
Preferably, described movable valve member is needle, and described valve assembly also comprises valve seat, and described needle comprises first end and the second end, thereby the second end of described needle is for engaging and close described valve seat with described valve seat.
Preferably, one end of described axle is provided with outside thread.
Preferably, the lower curtate place of described axle be provided be positioned at described axle described one end above the collar located.
Preferably, described supporting element comprises the first section and the second section, in the first section of described supporting element, be formed with through hole, the first section of described supporting element slidably receives described collar by its through hole, and, in the second section of described supporting element, be formed with non-circular or polygonal through hole.
Preferably, described anti-rotation latch comprises the first section and the second section, the first section of described anti-rotation latch is formed with female hole is set, the female hole that arranges of the first section of described anti-rotation latch engages with the externally threaded described threaded one end of being provided with of described axle, the first section of described anti-rotation latch is received in the through hole of the second section of described supporting element, and there is the non-circular or polygonal periphery matching in week in the non-circular or polygonal with the through hole of the second section of described supporting element, and, the first end of described needle in a fixed manner or slidably mode is arranged in the second section of described anti-rotation latch.
Preferably, described the first stop bit part is formed in the spring helical guideway of the periphery of described axle, and described the second stop bit part is the slip ring that can slide along described spring helical guideway.
Preferably, described spring helical guideway comprises helical guideway portion, is used as the first end of upper position-arresting portion and the second end that is used as lower position-arresting portion.
Preferably, described slip ring comprises Spiral Notebook body and extension.
Preferably, described Spiral Notebook body is configured with the helical configuration that the helical configuration with described helical guideway portion matches, to make described Spiral Notebook body can slidably be supported on described helical guideway portion, described Spiral Notebook body is configured with abutment end, and, described extension is constructed to be permeable to the first end butt with described spring helical guideway, and described abutment end is constructed to be permeable to the second end butt with described spring helical guideway.
Preferably, the rotation of described axle is limited between the first rotation stop bit position and the second rotation stop bit position, in described the first rotation stop bit position, the first end butt of described extension and described spring helical guideway, in described the second rotation stop bit position, the second end butt of described abutment end and described spring helical guideway.
Preferably, described stop bit mechanism also comprises for guiding the guiding element of described the second stop bit part translation vertically.
Preferably, described guiding element is embodied as two guide rods, and described guide rod extends upward from the upper end of described supporting element, and described guide rod is arranged in and limits gap therebetween, and the free end of described extension is received in described gap.
Alternately, described guiding element is embodied as single guide rod, and described guide rod extends upward from the upper end of described supporting element, and, thereby the free end of described extension can contact along described guide rod axial translation with described guide rod.
Alternately, described guiding element is embodied as single guide rod, and described guide rod extends upward from the upper end of described supporting element, and the free end of described extension forms ring body and is enclosed within on described guide rod.
Alternately, described guiding element is embodied as single guide rod, and described guide rod extends upward from the upper end of described supporting element, and described guide rod has for receiving the free-ended vertical slip conduit of described extension.
Alternately, described the first stop bit part comprises as the upper convex portion of upper position-arresting portion and as the lower protuberance of lower position-arresting portion, and the upper convex portion of described the first stop bit part and lower protuberance are arranged at the periphery of described axle and along the spaced apart intended distance of axial direction of described axle.
Preferably, described the second stop bit part be arranged at described anti-rotation latch and can with the translation vertically integratedly of described anti-rotation latch.
Preferably, described the second stop bit part comprises: from the outwardly directed cantilever arm of outer periphery of the upper end of described anti-rotation latch; The upwardly extending armstand in outer end from described cantilever arm; And the abutting part extending radially inwardly from the upper end of described armstand, described abutting part can with upper convex portion and the lower protuberance butt of described the first stop bit part.
Preferably, the rotation of described axle is limited between the first rotation stop bit position and the second rotation stop bit position, in described the first rotation stop bit position, the upper convex portion butt of described abutting part and described the first stop bit part, in described the second rotation stop bit position, the lower protuberance butt of described abutting part and described the first stop bit part.
Preferably, described stop bit mechanism also comprises for guiding the guiding element of described the second stop bit part translation vertically.
Preferably, described guiding element comprises the notch that is formed at described supporting element place, and described notch is for receiving and guide at least described cantilever arm.
Preferably, described the second stop bit part also comprises periphery from the upper end of described anti-rotation latch, with described cantilever arm diametrically contraposition leading thread to outwardly directed additional cantilever arm, and, described guiding element also comprises the additional notch that is formed at described supporting element place, and described additional notch is for receiving and guide described additional cantilever arm.
Preferably, described driving mechanism comprises rotor, and described rotor is embodied as and forms with described axle or cylindric magnet ring that be permanently connected, an end opening, thereby limits rotor chamber, and described stop bit mechanism is arranged in described rotor chamber at least in part.
Preferably, also comprise electromagnetism retaining mechanism, described electromagnetism retaining mechanism is constructed to be permeable to described axle be remained on to the first axial position and described axle is released into the second axial position during in power-off in when energising, in described the first axial position, can be in the situation that described axle be held in the axial position that fixing axial height regulates described movable valve member, in described the second axial position, described movable valve member is closed valve seat.
Preferably, described electromagnetism retaining mechanism is included in electromagnetic coil that when energising produce magnetic force, with respect to fixing the determining iron and determine with respect to described the moving iron that iron can move of described electromagnetic coil, and one end of described axle is connected with described moving iron.
In present specification, directional terminology " on ", the use of D score and " top " etc. is only for the object of being convenient to describe, and should not to be considered as be restrictive.
Although with reference to illustrative embodiments, invention has been described, but be to be understood that, the present invention is not limited to concrete example/mode of execution of describing in detail and illustrating here, in the situation that not departing from claims limited range, those skilled in the art can make various changes to illustrative embodiments.
Claims (26)
1. an electric expansion valve (1), comprising:
Valve assembly (10), described valve assembly (10) comprises movable valve member (14) and for regulating flowing through the flow of the fluid of described electric expansion valve (1);
Actuator (50), described actuator (50) comprises axle (51), supporting element (53), and anti-rotation latch (55) and for driving described movable valve member (14) to carry out axial motion, described axle (51) engages with the threaded one end of described anti-rotation latch (55), described movable valve member (14) is arranged at the other end of described anti-rotation latch (55), described supporting element (53) receives at least a portion of described anti-rotation latch (55), described in making when described axle (51) is rotated anti-rotation latch (55) together with described movable valve member (14) can with respect to described supporting element (53) carry out axial motion but can not be rotated, and
Driving mechanism (40), described driving mechanism (40) is used to described actuator (50) that power is provided,
Wherein, described electric expansion valve (1) also comprise stop bit mechanism (57,57 ', 57A),
And, described stop bit mechanism (57,57 ', 57A) comprise the first stop bit part (57-1,57-1A) and the second stop bit part (57-3,57-3A), described the first stop bit part (57-1,57-1A) can rotate integratedly with described axle (51), described the second stop bit part (57-3,57-3A) can the translation vertically along with the rotation of described axle (51), thereby makes described the first stop bit part (57-1,57-1A) with described the second stop bit part (57-3,57-3A) mutually butt to limit the scope of the rotation of described axle (51).
2. electric expansion valve according to claim 1 (1), wherein
Described movable valve member (14) is needle (14),
Described valve assembly (10) also comprises valve seat (18),
And described needle (14) comprises first end (14-1) and the second end (14-2), second end (14-2) of described needle (14) for described valve seat (18) thus engage and close described valve seat (18).
3. electric expansion valve according to claim 2 (1), wherein, one end (51-2) of described axle (51) is provided with outside thread.
4. electric expansion valve according to claim 3 (1), wherein, is provided with the collar (51-4) at the place, top of the described one end (51-2) that is positioned at described axle (51) at the lower curtate place of described axle (51).
5. electric expansion valve according to claim 4 (1), wherein
Described supporting element (53) comprises the first section (53-1) and the second section (53-2),
In first section (53-1) of described supporting element (53), be formed with through hole, first section (53-1) of described supporting element (53) slidably receives described collar (51-4) by its through hole,
And, in second section (53-2) of described supporting element (53), be formed with non-circular or polygonal through hole.
6. electric expansion valve according to claim 5 (1), wherein
Described anti-rotation latch (55) comprises the first section (55-1) and the second section (55-2),
First section (55-1) of described anti-rotation latch (55) is formed with female hole is set, externally threaded described one end (51-2) that is provided with that female hole and described axle (51) are set of first section (55-1) of described anti-rotation latch (55) is threadedly engaged with
First section (55-1) of described anti-rotation latch (55) is received in the through hole of the second section (53-2) of described supporting element (53) and has the non-circular or polygonal periphery matching in week in the non-circular or polygonal with the through hole of second section (53-2) of described supporting element (53)
And the first end (14-1) of described needle (14) in a fixed manner or slidably mode is arranged in second section (55-2) of described anti-rotation latch (55).
7. according to the electric expansion valve described in any one in claim 1 to 6 (1), wherein, described the first stop bit part (57-1) is formed in the spring helical guideway (57-1) of the periphery of described axle (51), and described the second stop bit part (57-3) is the slip ring (57-3) that can slide along described spring helical guideway (57-1).
8. electric expansion valve according to claim 7 (1), wherein, described spring helical guideway (57-1) comprises helical guideway portion (57-11), as the first end (57-12) of upper position-arresting portion and as second end (57-13) of lower position-arresting portion.
9. electric expansion valve according to claim 8 (1), wherein, described slip ring (57-3) comprises Spiral Notebook body (57-31) and extension (57-32).
10. electric expansion valve according to claim 9 (1), wherein
Described Spiral Notebook body (57-31) is configured with the helical configuration that the helical configuration with described helical guideway portion (57-11) matches, to make described Spiral Notebook body (57-31) can slidably be supported on described helical guideway portion (57-11)
Described Spiral Notebook body (57-31) is configured with abutment end (57-311),
And, described extension (57-32) is constructed to be permeable to first end (57-12) butt with described spring helical guideway (57-1), and described abutment end (57-311) is constructed to be permeable to the second end (57-13) butt with described spring helical guideway (57-1).
11. electric expansion valves according to claim 9 (1), wherein, the rotation of described axle (51) is limited between the first rotation stop bit position and the second rotation stop bit position, in described the first rotation stop bit position, first end (57-12) butt of described extension (57-32) and described spring helical guideway (57-1), in described the second rotation stop bit position, the second end (57-13) butt of described abutment end (57-311) and described spring helical guideway (57-1).
12. electric expansion valves according to claim 9 (1), wherein, described stop bit mechanism (57,57 ') also comprises for guiding the guiding element (57-5) of described the second stop bit part (57-3) translation vertically.
13. electric expansion valves according to claim 12 (1), wherein
Described guiding element (57-5) is embodied as two guide rods (57-51), and described guide rod (57-51) extends upward from the upper end of described supporting element (53), and described guide rod (57-51) is arranged in and limits gap therebetween,
And the free end (57-322) of described extension (57-32) is received in described gap.
14. electric expansion valves according to claim 12 (1), wherein
Described guiding element (57-5) is embodied as single guide rod, and described guide rod extends upward from the upper end of described supporting element (53),
And, the free end (57-322) of described extension (57-32) thus can contact along described guide rod axial translation with described guide rod.
15. electric expansion valves according to claim 12 (1), wherein
Described guiding element (57-5) is embodied as single guide rod (57-51 '), and described guide rod (57-51 ') extends upward from the upper end of described supporting element (53),
And the free end (57-322 ') of described extension (57-32) forms ring body and is enclosed within on described guide rod (57-51 ').
16. electric expansion valves according to claim 12 (1), wherein, described guiding element (57-5) is embodied as single guide rod, described guide rod extends upward from the upper end of described supporting element (53), and described guide rod has the vertical slip conduit of the free end (57-322) for receiving described extension (57-32).
17. according to the electric expansion valve described in any one in claim 1 to 6 (1), wherein
Described the first stop bit part (57-1A) comprises as the upper convex portion (57-12A) of upper position-arresting portion and as the lower protuberance (57-13A) of lower position-arresting portion,
And the upper convex portion (57-12A) of described the first stop bit part (57-1A) and lower protuberance (57-13A) are arranged at the periphery of described axle (51) and along the spaced apart intended distance of axial direction of described axle (51).
18. electric expansion valves according to claim 17 (1), wherein, described the second stop bit part (57-3A) be arranged at described anti-rotation latch (55) and can with described anti-rotation latch (55) translation vertically integratedly.
19. electric expansion valves according to claim 18 (1), wherein, described the second stop bit part (57-3A) comprising:
The outwardly directed cantilever arm of outer periphery (57-36) from the upper end of described anti-rotation latch (55);
The upwardly extending armstand in outer end (57-37) from described cantilever arm (57-36); And
The abutting part (57-38) extending radially inwardly from the upper end of described armstand (57-37), described abutting part (57-38) can with upper convex portion (57-12A) and lower protuberance (57-13A) butt of described the first stop bit part (57-1A).
20. electric expansion valves according to claim 19 (1), wherein, the rotation of described axle (51) is limited between the first rotation stop bit position and the second rotation stop bit position, in described the first rotation stop bit position, upper convex portion (57-12A) butt of described abutting part (57-38) and described the first stop bit part (57-1A), in described the second rotation stop bit position, lower protuberance (57-13A) butt of described abutting part (57-38) and described the first stop bit part (57-1A).
21. electric expansion valves according to claim 19 (1), wherein, described stop bit mechanism (57A) also comprises for guiding the guiding element (57-5A) of described the second stop bit part (57-3A) translation vertically.
22. electric expansion valves according to claim 21 (1), wherein, described guiding element (57-5A) comprises and is formed at the notch (57-56) that described supporting element (53) is located, and described notch (57-56) is for receiving and guide at least described cantilever arm (57-36).
23. electric expansion valves according to claim 22 (1), wherein
Described the second stop bit part (57-3A) also comprises periphery from the upper end of described anti-rotation latch (55), with described cantilever arm (57-36) diametrically contraposition leading thread to outwardly directed additional cantilever arm (57-39),
And described guiding element (57-5A) also comprises and be formed at the additional notch (57-57) that described supporting element (53) is located, described additional notch (57-56) is for receiving and guide described additional cantilever arm (57-39).
24. according to the electric expansion valve described in any one in claim 1 to 6 (1), wherein
Described driving mechanism (40) comprises rotor (42), and described rotor (42) is embodied as and forms with described axle (51) or cylindric magnet ring that be permanently connected, an end opening, thereby limits rotor chamber (42-1),
And, described stop bit mechanism (57,57 ', 57A) be arranged at least in part in described rotor chamber (42-1).
25. according to the electric expansion valve described in any one in claim 1 to 6 (1), also comprise electromagnetism retaining mechanism (60), described electromagnetism retaining mechanism (60) is constructed to be permeable to described axle (51) be remained on to the first axial position and described axle (51) is released into the second axial position during in power-off in when energising, in described the first axial position, can be in the situation that described axle (51) be held in the axial position that fixing axial height regulates described movable valve member (14), in described the second axial position, described movable valve member (14) is closed valve seat (18).
26. electric expansion valves according to claim 25 (1), wherein
Described electromagnetism retaining mechanism (60) is included in electromagnetic coil (61) that when energising produce magnetic force, with respect to fixing the determining iron (62) and determine with respect to described the moving iron (64) that iron (62) can move of described electromagnetic coil (61),
And one end (51-1) of described axle (51) is connected with described moving iron (64).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210327242.2A CN103672131B (en) | 2012-09-06 | 2012-09-06 | Electronic expansion valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210327242.2A CN103672131B (en) | 2012-09-06 | 2012-09-06 | Electronic expansion valve |
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| CN103672131A true CN103672131A (en) | 2014-03-26 |
| CN103672131B CN103672131B (en) | 2016-06-08 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018133673A1 (en) * | 2017-01-18 | 2018-07-26 | 浙江三花制冷集团有限公司 | Electronic expansion valve and assembly method therefor |
| WO2019042100A1 (en) * | 2017-08-29 | 2019-03-07 | 杭州三花研究院有限公司 | Control method and control system |
| CN110260023A (en) * | 2018-03-12 | 2019-09-20 | 浙江三花制冷集团有限公司 | A kind of guide electromagnetic valve |
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| CN111059296B (en) * | 2018-10-17 | 2022-02-08 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN111059296A (en) * | 2018-10-17 | 2020-04-24 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| US20220042728A1 (en) * | 2018-12-25 | 2022-02-10 | Zhejiang Dunan Artificial Environment Co., Ltd. | Electronic Expansion Valve and Air Conditioning System with Electronic Expansion Valve |
| US11796234B2 (en) * | 2018-12-25 | 2023-10-24 | Zhejiang Dunan Artificial Environment Co., Ltd. | Electronic expansion valve and air conditioning system with electronic expansion valve |
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| CN111561571B (en) * | 2019-02-14 | 2023-11-21 | 株式会社Tgk | Electric valve |
| WO2021042955A1 (en) * | 2019-09-06 | 2021-03-11 | 艾默生环境优化技术(苏州)有限公司 | Electronic expansion valve |
| CN112460860A (en) * | 2019-09-06 | 2021-03-09 | 艾默生环境优化技术(苏州)有限公司 | Electronic expansion valve |
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