CN204201230U - A kind of chiller plant and electric expansion valve thereof - Google Patents
A kind of chiller plant and electric expansion valve thereof Download PDFInfo
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- CN204201230U CN204201230U CN201420529099.XU CN201420529099U CN204201230U CN 204201230 U CN204201230 U CN 204201230U CN 201420529099 U CN201420529099 U CN 201420529099U CN 204201230 U CN204201230 U CN 204201230U
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Abstract
The utility model provides a kind of chiller plant and electric expansion valve thereof, can guarantee the reliability of earth-continuity, improve safety in utilization.Described electric expansion valve comprises valve body and coil, described coil comprises electromagnetism pole plate, with the stator casing of described electromagnetism pole plate conductive contact and be wrapped in both outside plastic housings, also comprise and can conduct electricity with described valve body the link be connected, described plastic housing is provided with the mounting hole for installing described link, so that described link is by described mounting hole and described electromagnetism pole plate or described stator casing conductive contact.Compared with prior art, the resin layer produced in the process of molding and forming can not affect the contact reliability of link and stator casing or electromagnetism pole plate, there is not the problem causing Joint failure because service time is long yet, after link is fit into mounting hole, mounting hole is by shutoff, whole stator casing and electromagnetism pole plate encapsulated, thus can avoid causing earth-continuity bad because to get rusty etc.
Description
Technical field
The utility model relates to refrigeration system technical field, particularly a kind of electric expansion valve and have the chiller plant of this electric expansion valve.
Background technique
Stepper motor direct driving type electronic expansion valve is one of basic element of character of refrigeration system, is the critical component of regulating system uninterrupted.
Please refer to Fig. 1, Fig. 1 is the structural representation of a kind of set-up mode of electric expansion valve in prior art.
In prior art, stepper motor automatic type electric expansion valve comprises valve body 100 and coil 200 two-part, and wherein, valve body 100 is equivalent to the rotor portion of stepper motor, and coil 200 is equivalent to the stationary part of stepper motor; Coil 200 comprises electromagnetism pole plate 210, the stator casing 220 contacted with electromagnetism pole plate 210 and is wrapped in the plastic housing 230 of stator casing 220 outside; By applying pulsed drive signal to the winding on coil 200, the pawl of the electromagnetism pole plate 210 of coil 200 is extremely upper produces regular Movement in Magnetic Field, with the rotor turns of moving valve 100 inside, with the size of regulation valve body 100 valve port place flow, thus realize the regulable control to flow in system.
Under normal circumstances, the signal be applied on coil 200 winding is low voltage AC pulse train signal, but under particular case, coil 200 can be subject to installation environment, magnetic interference, lightning impulse etc. affect and change high pressure or ultrahigh pressure signal into, therefore, need by coil flux guide by the refrigerant pipeline of refrigeration system and extraneous reliable ground, therefore during electric expansion valve design need coil flux guide (stator casing 220 and electromagnetism pole plate 210) to be connected with valve body 100 conducting of electric expansion valve.
As shown in Figure 1, in electric expansion valve disclosed in a kind of prior art, valve body 100 be externally connected to fixing frame 300, coil 200 is connected with the buckle 400 coordinated with fixing frame 300, buckle 400 further contact is connected with transition part, and described transition part contacts with stator casing 220, then stator casing 220 is communicated with valve body 100 by the transition part of buckle 400, fixing frame 300 successively, thus by valve body 100 and extraneous ground connection.
In the above prior art, coil 200 is outer encapsulating structure, and namely described plastic housing 230 is encapsulated in inside from outside by magnet case (i.e. electromagnetism pole plate 210 and stator casing 220); During plastic packaging, resin may be extruded from die gap, cause generation tree lipid layer between described transition part on buckle 400 and stator casing 220, thus cause the reed of buckle 400 (i.e. described transition part) and stator casing 220 bad connection, make earth-continuity disabler.
Moreover, the buckle 400 of this structure is shaping by sheet metal forming, whether the reed of buckle 400 and stator casing 220 can reliable contacts, relation is had with the position dimension of the first positioning groove on the elasticity of the size of reed, reed, coil 200, so, all products of guarantee must be all strictly controlled to above-mentioned project and reliably conducting can be contacted; Thus, stability that is shaping to buckle 400 stamping-out and coil 200 molding and forming is had higher requirement, and then the required precision that improve blanking die and coil injection molding mould, be unfavorable for production control cost, be also unfavorable for the reliability totally ensureing product earth-continuity.
In addition, the reed of buckle 400 relies on the exposed location contacts of elasticity and stator casing 220, along with time history, the elasticity of reed can be more and more less, the exposed position of stator casing 220 also there will be corrosion situation, in the course of time, can reduce the contact reliability of buckle 400 and stator casing 220.
Therefore, how designing a kind of electric expansion valve, to improve Earthing Reliability, is the current technical issues that need to address of those skilled in the art.
Model utility content
The purpose of this utility model is to provide a kind of electric expansion valve, can guarantee the reliability of earth-continuity, improve safety in utilization.
Another object of the present utility model is to provide a kind of chiller plant with above-mentioned electric expansion valve, abnormal pressure etc. can be avoided to affect its control system, improve safety in utilization.
For solving the problems of the technologies described above, the utility model provides a kind of electric expansion valve, comprise valve body and coil, described coil comprises electromagnetism pole plate, with the stator casing of described electromagnetism pole plate conductive contact and be wrapped in both outside plastic housings, also comprise and can conduct electricity with described valve body the link be connected, described plastic housing is provided with the mounting hole for installing described link, so that described link is by described mounting hole and described electromagnetism pole plate or described stator casing conductive contact.
Electric expansion valve of the present utility model, the plastic housing of coil is provided with mounting hole, so as link access mounting hole after with stator casing or electromagnetism pole plate conductive contact; Buckle reed Earth Phase ratio is passed through with prior art, after mounting hole takes shape in plastic housing molding and forming, therefore the resin layer produced in the process of molding and forming can not have an impact to mounting hole, also would not affect the contact reliability of link and stator casing or electromagnetism pole plate; Moreover link and mounting hole cooperatively interact, and link can be changed as required, there is not the problem causing Joint failure because service time is long, then, when using for a long time, still can guarantee Earthing Reliability; Stator casing or electromagnetic pole plate portion are exposed in mounting hole, after link is fit into mounting hole, mounting hole by shutoff, whole stator casing and electromagnetism pole plate encapsulated, there is not the part that contact exposed with outside, thus can avoid causing earth-continuity bad because to get rusty etc.; Meanwhile, reduce the required precision to coil injection molding mould, effectively can control die cost, the size requirement of coil injection molding part can also be reduced, relax production technology, improve rate of good product, and then reduce product cost.
Described stator casing has axial extension part, and described mounting hole extends along the axis of described coil, and the outside of the described axial extension part that reclines, so that described link is fitted with described axial extension part surface after accessing described mounting hole.
Described in the centre distance of described mounting hole, the radial distance of axial extension part outer side surface is less than the half of described link external diameter.
Described stator casing has axial extension part, and described mounting hole extends to described axial extension part along the radial direction of described coil, so that described link abuts with the outer side surface of its end face with described axial extension part after accessing described mounting hole.
Described link has the insertion part of inserting described mounting hole, and the outer side surface of described mounting hole is less than the length of described insertion part apart from the radial distance of the outer side surface of described axial extension part.
The top of described insertion part has for the sharp portion through described axial extension part.
Described stator casing has radial extension part, and described mounting hole extends along the radial direction of described coil, and the lower end surface of the described radial extension part that reclines, so that described link is fitted with the lower end surface of its upper side and described radial extension part after accessing described mounting hole.
Described link is tapping screw, and the internal diameter of described mounting hole is greater than the root diameter of described tapping screw, is less than the crest diameter of described tapping screw.
Described coil is connected by locating fastener and described valve body, described link and described locating fastener conductive contact.
Described locating fastener has the joint be connected with described valve body and the positioning hole passed for described link, and described link is positioned in described mounting hole, described locating fastener and described coil to be connected through after described positioning hole.
Described joint is be installed in the clip in the adapter of described valve body; Or described joint is the card division coordinated with the fixing frame of described valve body.
The utility model also provides a kind of chiller plant, adopts the flow of the electric expansion valve described in above-mentioned any one to its refrigeration system to control.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of set-up mode of electric expansion valve in prior art;
Fig. 2 provides by the utility model the cross-sectional view of electric expansion valve in the first embodiment;
The partial structurtes schematic diagram that Fig. 3 decomposes for the assembling of electric expansion valve shown in Fig. 2;
Fig. 4 is the assembling exploded perspective view of the coil of electric expansion valve shown in Fig. 2, locating fastener and link;
Fig. 5 provides by the utility model the cross-sectional view of electric expansion valve in the second embodiment;
The perspective view that Fig. 6 decomposes for the assembling of electric expansion valve shown in Fig. 5;
Fig. 7 provides by the utility model the cross-sectional view of electric expansion valve in the third embodiment;
The partial structurtes schematic diagram that Fig. 8 decomposes for the assembling of electric expansion valve shown in Fig. 7;
Fig. 9 is the assembling exploded perspective view of the coil of electric expansion valve shown in Fig. 7, locating fastener and link.
In Fig. 1:
Valve body 100, coil 200, electromagnetism pole plate 210, stator casing 220, plastic housing 230, fixing frame 300, buckle 400
In Fig. 2-9:
Valve body 1, adapter 11, fixing frame 12, coil 2, electromagnetism pole plate 21, stator casing 22, axial extension part 221, radial extension part 222, plastic housing 23, mounting hole 231, link 3, insertion part 31, sharp portion 32, locating fastener 4, joint 41, positioning hole 42
Embodiment
Core of the present utility model is to provide a kind of electric expansion valve, can guarantee the reliability of earth-continuity, improve safety in utilization.
In order to make those skilled in the art person understand the utility model scheme better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
To please refer to Fig. 2-4, Fig. 2 provides by the utility model the cross-sectional view of electric expansion valve in the first embodiment; The partial structurtes schematic diagram that Fig. 3 decomposes for the assembling of electric expansion valve shown in Fig. 2; Fig. 4 is the assembling exploded perspective view of the coil of electric expansion valve shown in Fig. 2, locating fastener and link.
In the first embodiment, electric expansion valve of the present utility model comprises valve body 1 and coil 2, coil 2 comprises electromagnetism pole plate 21, stator casing 22 and is wrapped in both outside nonconducting plastic housings 23, wherein, and electromagnetism pole plate 21 and stator casing 22 conductive contact; Electric expansion valve of the present utility model also comprises link 3, link 3 can conduct electricity with valve body 1 and be connected, plastic housing 23 is provided with mounting hole 231, link 3 is arranged in mounting hole 231, and by mounting hole 231 and electromagnetism pole plate 21 or stator casing 22 conductive contact, namely when link 3 is arranged in mounting hole 231, just can with electromagnetism pole plate 21 or stator casing 22 conductive contact.
Electric expansion valve of the present utility model, plastic housing 23 is provided with mounting hole 231, and is arranged in mounting hole 231 by link 3, so as with stator casing 22 or electromagnetism pole plate 21 conductive contact; With in prior art by the reed of buckle compared with the exposed portion conductive contact of stator casing, mounting hole 231 forms at plastic housing 23 molding and forming aft-loaded airfoil, can not affect the reliability of conductive contact because of the overlap generation tree lipid layer in injection moulding process; Link 3 of the present utility model accesses in mounting hole 231 ordinatedly, thus the conductive contact realized in mounting hole 231 with stator casing 22 or electromagnetism pole plate 21, stator casing 22 or electromagnetism pole plate 21 can not be exposed to outside, also just do not exist and cause earth-continuity bad because getting rusty; Link 3 and mounting hole 231 cooperatively interact, and can change as required, there is not the problem causing Joint failure because using for a long time, can ensure the reliability of earth-continuity.
On the other hand, in the application, the reliability of earth-continuity is only relevant with the precision of mounting hole 231 with link 3, relatively low to the requirement of plastic housing 23, thus reduces the required precision to coil injection molding mould, effectively can control die cost; Moreover, reduce the size requirement to coil injection molding part, thus relax production technology, improve rate of good product, to reduce product cost.
Described stator casing 22 and electromagnetism pole plate 21 are coil flux guide, stator casing 22 and electromagnetism pole plate 21 match and arrange, two pairs of stator casings 22 and electromagnetism pole plate 21 can be set usually, as required stator casing 22 can be inverted with electromagnetism pole plate 21 and coordinate, and the function of coil 2 can not be affected; That is, stator casing 22 described herein and electromagnetism pole plate 21 are comparatively speaking, in actual use, link 3 optionally can be contacted with stator casing 22 or electromagnetism pole plate 21.
Only to contact with stator casing 22 for link 3 herein and be described in detail, but, those skilled in the art are to be understood that, because stator casing 22 and electromagnetism pole plate 21 can be inverted, go at following specific embodiment the situation that link 3 contacts with electromagnetism pole plate 21 equally.
Particularly, for realizing coil 2 and the connection of valve body 1, locating fastener 4 can be set, coil 2 and valve body 1 to be connected by locating fastener 4; Meanwhile, by link 3 and locating fastener 4 conductive contact, can also be connected with the conduction of valve body 1 to realize link 3; Locating fastener 4 and link 3 are all set to metallic conductor, after then link 3 is arranged on the mounting hole 231 that recline stator casing 22 or electromagnetism pole plate 21 preset, its one end and electromagnetism pole plate 21 or stator casing 22 conductive contact, the other end and locating fastener 4 conductive contact, thus coil flux guide (i.e. electromagnetism pole plate 21 and stator casing 22) is conducted electricity with valve body 1 be connected, avoid pressure electric voltage exception to affect the safety in utilization of electric expansion valve.
By the reed of setting on locating fastener 4 and stator casing 22 Elastic Contact in prior art, so that by stator casing 22 and extraneous conducting, then higher to the required precision of locating fastener 4, when locating fastener 4 is only for connecting coil 2 and valve body 1, reduce the requirement to its machining accuracy, relax its manufacturing condition, thus improve rate of good product, reduce product cost; When the required precision of locating fastener 4 reduces, to the requirement also corresponding reduction of its blanking die, further save the cost of mould.
When arranging locating fastener 4, locating fastener 4 can comprise joint 41 and positioning hole 42, at the outside Connection Bracket 12 of valve body 1, then the joint 41 of locating fastener 4 can also be connected with fixing frame 12, to realize being fixedly connected with of locating fastener 4 and valve body 1; Joint 41 can be the card division coordinated with fixing frame 12, or insertion part etc.; Positioning hole 42 can be used for link 3 to pass, during connection, can by link 3 first through the positioning hole 42 on locating fastener 4, then be positioned in the mounting hole 231 of plastic housing 23, so that link 3 can realize being connected of locating fastener 4 and coil 2 simultaneously, then valve body 1 is fixedly connected with coil 2 by locating fastener 4, as in Figure 2-4.
Certainly, realize the mode that coil 2 and locating fastener 4 be connected various, be not limited by link 3 and be fixed, such as, locating fastener 4 can also by clamping, the mode such as resin-encapsulated fixes; The mode that locating fastener 4 and valve body 1 are connected also is not limited to adopt fixing frame 12, valve body 1 can arrange fixing frame 12, and be directly fastened on valve body 1 by locating fastener 4, or adopt other Placements; Such as, in the concrete set-up mode of one, valve body 1 is provided with adapter 11, and directly can clamp joint 41 with in adapter 11, namely the structural type of joint 41 is various, can also be the parts such as clip, the description of the second embodiment that specifically sees below.
In addition, orientation described is herein with coil 2 and valve body 1 for reference, and when coil 2 is installed with valve body 1, the valve rod bearing of trend of valve body 1 is described axis, coil 2 coil winding be described circumference around direction, the direction perpendicular to the threaded shaft of coil 2 is described radial direction; With coil 2 around center for reference, diametrically, in the described direction around center is, be outward away from the described direction around center; In the axial direction, the direction being pointed to coil 2 by valve body 1 is upper, under the direction pointing to valve body 1 by coil 2 is.
Obviously, orientation herein only in order to express easily, does not represent the concrete restriction of structure to electric expansion valve and mounting point.
As in Figure 2-4, in the first embodiment, stator casing 22 has axial extension part 221, mounting hole 231 extends along the axis of coil 2, and the outside of the axial extension part 221 that reclines, then, after link 3 accesses mounting hole 231, can fit with axial extension part 221 surface of stator casing 22, stator casing 22 is conducted electricity with valve body 1 by link 3 and is connected, and then is grounded connection.
Those skilled in the art are to be understood that, the axial extension part 221 of stator casing 22 refers to that stator casing 22 has the part extended in the axial direction, not spindle must be parallel to the axis of coil 2 to the extension axis of extension part 221 definitely, can offset certain angle to axial, namely the elongation axis of axial extension part 221 is in axis substantially; In like manner, mounting hole 231 extends in the axial direction and also refers to that it substantially extends in the axial direction, the axial extension part 221 can recline, namely mounting hole 231 is unanimous on the whole with the extension direction of axial extension part 221, to ensure that link 3 can contact with axial extension part 221 after being fit into mounting hole 231.
Described link 3 is fitted with axial extension part 221 surface and is referred to, link 3 can form linear contact lay with the surface of axial extension part 221 or face contacts, to ensure the reliability of grounding connection.
As shown in Figure 3, the center of mounting hole 231 is H to the radial distance of the outer side surface of axial extension part 221, the external diameter of link 3 is D2, then for ensureing connection reliability, make axial extension part 221 close contact of link 3 and stator casing 22, H can be made to be slightly less than D2/2, so that link 3 inwardly presses close to axial extension part 221.
Simultaneously, link 3 can be tapping screw, the internal diameter of mounting hole 231 is D0, tapping screw crest diameter is its outer diameter D 2, its root diameter is D1, then D1<D0<D2, enters in mounting hole 231 so that link 3 is spirally connected, and can fixedly positioning in mounting hole 231 and not loosen, thus ensure stator casing 22 and extraneous conducting.
Link 3 can also be the connected element that metal rivet, metal pin or resilient key etc. are identical with tapping screw effect.
As shown in Figure 4, when coil 2 is fixedly connected with valve body 1 by locating fastener 4, the positioning hole 42 that link 3 passes can be set on locating fastener 4, locating fastener 4 also has the joint be connected with valve body 1, then locating fastener 4 is connected with valve body 1 with its joint 41, link 3 is located by connecting with mounting hole 231 through after positioning hole 42 again, thus by locating fastener 4 screwed in place, as described above.
Being the utility model incorporated by reference to Fig. 5 and Fig. 6, Fig. 5 provides the cross-sectional view of electric expansion valve in the second embodiment; The perspective view that Fig. 6 decomposes for the assembling of electric expansion valve shown in Fig. 5.
In the second embodiment, stator casing 22 can also have radial extension part 222, mounting hole 231 can extend along the radial direction of coil 2, and the lower end surface of the radial extension part 222 that reclines, then link 3 is arranged on after in mounting hole 231, its upper side can be fitted with the lower end surface of radial extension part 222, as shown in Figure 5.
With mentioned above, the bearing of trend of radial extension part 222 and mounting hole 231 is unanimous on the whole, so as link 3 to access after mounting hole 231 can with the radial extension part 222 of stator casing 22 fully conductive contact, ensure the reliability connected; That is, the bearing of trend of radial extension part 222 and mounting hole 231 can relative radial deflection several angle, is not limited to situation about strictly extending diametrically.
When adopting said structure, in like manner also can arrange the radial distance etc. of the lower end surface of the centre distance extension part 222 of the size of the aperture D0 of mounting hole 231, link 3 and mounting hole 231, so that link 3 is positioned in mounting hole 231 securely, and realize reliable contacts with the radial extension part 222 of stator casing 22, concrete set-up mode see above, can repeat no more herein.
Obviously, link 3 also can adopt the structural type described in the first embodiment, repeats no more herein.
In addition, when link 3 enters mounting hole 231 by the radial side of plastic housing 23, when arranging locating fastener 4 and coil 2 being connected with valve body 1, the positioning hole 42 of locating fastener 4 is opened in its end face outside extended vertically, without the need to radially extending internally, then can by the lower end surface of locating fastener 4 vertically to downward-extension, to form the joint 41 of buckle-like, thus clamp fixing with the adapter 11 of valve body 1, as shown in Figure 6; Now can save the fixing frame 12 that valve body 1 is arranged, and be convenient to realize with the assembling of adapter 11 be separated.
Please further composition graphs 7-9, Fig. 7 provide to by the utility model the cross-sectional view of electric expansion valve in the third embodiment; The partial structurtes schematic diagram that Fig. 8 decomposes for the assembling of electric expansion valve shown in Fig. 7; Fig. 9 is the assembling exploded perspective view of the coil of electric expansion valve shown in Fig. 7, locating fastener and link.
In the third embodiment, the radial direction of mounting hole 231 along coil 2 can be extended, until the axial extension part 221 of stator casing 22, after then link 3 is fit into mounting hole 231, its end face can abut with the outer side surface of axial extension part 221, the conductive contact of both realizations, as shown in Figure 7.
Can expect, just as mentioned above, axial extension part 221 and mounting hole 231 extend respectively substantially in axis and radial direction, can there is certain deviation angle; Meanwhile, as long as can ensure that link 3 abuts with axial extension part 221, the specific constructive form of realization is not limit.
As shown in Figure 8, also can limit the position of link 3 and mounting hole 231 and size relationship.Link 3 has the insertion part 31 can inserting mounting hole 231, the length of insertion part 31 is L, then the outer side surface distance axis of mounting hole 231 can be less than L to the radial distance L0 of the outer side surface of extension part 221, to provide certain amount of deformation, link 3 can be pushed against with axial extension part 221, and avoiding connecting loosening to wait affects conducting reliability.
As shown in Figure 9, now also locating fastener 4 can be set, and radial through positioning hole 42 is set on the outer side surface of locating fastener 4 axial continuation, by link 3 successively through positioning hole 42 and mounting hole 231, while realizing link 3 and stator casing 22 conductive contact, locating fastener 4 and coil 2 are located by connecting.
As shown in Figure 8, sharp portion 32 can also be set on the top of insertion part 31, namely the tapping screw on pinnacle can be adopted, so that when it is conflicted and continues to be screwed into after axial extension part 221 again, axial extension part 221 can be headed into comparalive ease, to reduce the amount of deformation of stator casing 22, guarantee the nut compressing locating fastener 4 of tapping screw simultaneously, and then guarantee link 3 reliably conducting stator casing 22 and locating fastener 4, realize the reliable ground of stator casing 22.
It will also be appreciated that, link 3 also can adopt the structures such as tapping screw, when adopting tapping screw, the internal diameter of mounting hole 231 is D0, and the crest diameter of tapping screw is its outer diameter D 2, and its root diameter is D1, in like manner D1<D0<D2 is set, enter in mounting hole 231 so that link 3 is spirally connected, and can fixedly positioning in mounting hole 231 and not loosen, thus ensure stator casing 22 and extraneous conducting.
It should be noted that, only be described for above-mentioned three kinds of embodiments herein, but the set-up mode of mounting hole 231 is various, be not limited to above-mentioned three kinds of modes, those skilled in the art can arrange mounting hole 231 as required, so that by link 3 and stator casing 22 or electromagnetism pole plate 21 conductive contact, concrete set-up mode will not enumerate.
The utility model also provides a kind of chiller plant, adopts the flow of above-mentioned Electronic Expansion Valve on Refrigeration System to control, and to play the effect that coolant throttle regulates, its use is reliably safer.
Because electric expansion valve of the present utility model can ensure Earthing Reliability, effectively avoid abnormal pressure on the impact of coil 2, and then avoid abnormal pressure or electrostatic etc. to produce harmful effect to the control mainboard of the chiller plants such as air-conditioning.
In addition, the kind of chiller plant is more, and structural type is various, is only described a part for its electric expansion valve herein, and other part-structures please refer to prior art, repeat no more herein.
Above chiller plant provided by the utility model and electric expansion valve thereof are described in detail.Apply specific case herein to set forth principle of the present utility model and mode of execution, the explanation of above embodiment just understands core concept of the present utility model for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (12)
1. an electric expansion valve, comprise valve body (1) and coil (2), described coil (2) comprises electromagnetism pole plate (21), with the stator casing (22) of described electromagnetism pole plate (21) conductive contact and be wrapped in both outside plastic housings (23), it is characterized in that, also comprise and can conduct electricity with described valve body (1) link (3) be connected, described plastic housing (23) is provided with the mounting hole (231) for installing described link (3), so that described link (3) is by described mounting hole (231) and described electromagnetism pole plate (21) or described stator casing (22) conductive contact.
2. electric expansion valve as claimed in claim 1, it is characterized in that, described stator casing (22) has axial extension part (221), described mounting hole (231) extends along the axis of described coil (2), and the outside of the described axial extension part (221) that reclines, fit with described axial extension part (221) surface afterwards so that described link (3) accesses described mounting hole (231).
3. electric expansion valve as claimed in claim 2, it is characterized in that, described in the centre distance of described mounting hole (231), the radial distance (H) of axial extension part (221) outer side surface is less than the half of described link (3) external diameter (D2).
4. electric expansion valve as claimed in claim 1, it is characterized in that, described stator casing (22) has axial extension part (221), described mounting hole (231) extends to described axial extension part (221) along the radial direction of described coil (2), so that described link (3) abuts with the outer side surface of its end face with described axial extension part (221) after accessing described mounting hole (231).
5. electric expansion valve as claimed in claim 4, it is characterized in that, described link (3) has the insertion part (31) of inserting described mounting hole (231), and the outer side surface of described mounting hole (231) is less than the length (L) of described insertion part (31) apart from the radial distance (L0) of the outer side surface of described axial extension part (221).
6. electric expansion valve as claimed in claim 5, is characterized in that, the top of described insertion part (31) has for the sharp portion (32) through described axial extension part (221).
7. electric expansion valve as claimed in claim 1, it is characterized in that, described stator casing (22) has radial extension part (222), described mounting hole (231) extends along the radial direction of described coil (2), and the lower end surface of the described radial extension part (222) that reclines, so that described link (3) is fitted with the lower end surface of its upper side and described radial extension part (222) after accessing described mounting hole (231).
8. the electric expansion valve as described in any one of claim 1-7, it is characterized in that, described link (3) is tapping screw, the internal diameter (D0) of described mounting hole (231) is greater than the root diameter (D1) of described tapping screw, is less than the crest diameter (D2) of described tapping screw.
9. electric expansion valve as claimed in claim 8, it is characterized in that, described coil (2) is connected by locating fastener (4) and described valve body (1), described link (3) and described locating fastener (4) conductive contact.
10. electric expansion valve as claimed in claim 9, it is characterized in that, described locating fastener (4) has the joint (41) be connected with described valve body (1) and the positioning hole (42) passed for described link (3), described link (3) is positioned in described mounting hole (231) through after described positioning hole (42), described locating fastener (4) and described coil (2) to be connected.
11. electric expansion valves as claimed in claim 10, is characterized in that, described joint (41) is for being installed in the clip in the adapter (11) of described valve body (1); Or described joint (41) is the card division coordinated with the fixing frame (12) of described valve body (1).
12. 1 kinds of chiller plants, is characterized in that, adopt the flow of electric expansion valve to its refrigeration system described in any one of the claims 1-11 to control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420529099.XU CN204201230U (en) | 2014-09-15 | 2014-09-15 | A kind of chiller plant and electric expansion valve thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420529099.XU CN204201230U (en) | 2014-09-15 | 2014-09-15 | A kind of chiller plant and electric expansion valve thereof |
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| CN204201230U true CN204201230U (en) | 2015-03-11 |
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| CN201420529099.XU Active CN204201230U (en) | 2014-09-15 | 2014-09-15 | A kind of chiller plant and electric expansion valve thereof |
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| CN107620824A (en) * | 2016-07-14 | 2018-01-23 | 浙江三花汽车零部件有限公司 | Electric expansion valve |
| CN108119699A (en) * | 2016-11-30 | 2018-06-05 | 盾安环境技术有限公司 | A kind of pilot valve and main valve attachment structure and air conditioning system for vehicle electric expansion valve |
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| CN111720607A (en) * | 2019-03-22 | 2020-09-29 | 株式会社Tgk | Electric valve |
| WO2022127266A1 (en) * | 2020-12-14 | 2022-06-23 | 广东美芝制冷设备有限公司 | Stator assembly, electronic expansion valve, and refrigeration device |
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| CN107620824A (en) * | 2016-07-14 | 2018-01-23 | 浙江三花汽车零部件有限公司 | Electric expansion valve |
| CN107620824B (en) * | 2016-07-14 | 2020-04-03 | 浙江三花汽车零部件有限公司 | Electronic expansion valve |
| CN111188933A (en) * | 2016-07-14 | 2020-05-22 | 浙江三花汽车零部件有限公司 | Electronic expansion valve |
| CN106500414A (en) * | 2016-10-20 | 2017-03-15 | 广东美的暖通设备有限公司 | Electric expansion valve, air-conditioner outdoor unit and air-conditioning |
| CN108119699A (en) * | 2016-11-30 | 2018-06-05 | 盾安环境技术有限公司 | A kind of pilot valve and main valve attachment structure and air conditioning system for vehicle electric expansion valve |
| CN109780301B (en) * | 2017-11-15 | 2022-06-17 | 浙江盾安机械有限公司 | Coil and expansion valve for valve |
| CN109780301A (en) * | 2017-11-15 | 2019-05-21 | 浙江盾安机械有限公司 | A kind of valve coil and expansion valve |
| CN111720607A (en) * | 2019-03-22 | 2020-09-29 | 株式会社Tgk | Electric valve |
| CN111720607B (en) * | 2019-03-22 | 2023-09-01 | 株式会社Tgk | Electric valve |
| WO2022127266A1 (en) * | 2020-12-14 | 2022-06-23 | 广东美芝制冷设备有限公司 | Stator assembly, electronic expansion valve, and refrigeration device |
| JP2023510685A (en) * | 2020-12-14 | 2023-03-15 | 広東美芝制冷設備有限公司 | Stator assemblies, electronic expansion valves and cooling equipment |
| EP4043765A4 (en) * | 2020-12-14 | 2023-08-16 | Guangdong Meizhi Compressor Co., Ltd. | Stator assembly, electronic expansion valve, and refrigeration device |
| JP7354445B2 (en) | 2020-12-14 | 2023-10-02 | 広東美芝制冷設備有限公司 | Stator assembly, electronic expansion valve and cooling equipment |
| US11867439B2 (en) | 2020-12-14 | 2024-01-09 | Guangdong Meizhi Compressor Co., Ltd. | Stator assembly, electronic expansion valve and refrigeration device |
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Address after: 312500 Xinchang, Zhejiang Qixing street under the Liquan Patentee after: Zhejiang three flower intelligent control Limited by Share Ltd Address before: 312500 Xinchang, Zhejiang province Qixing street under the village of Liquan Patentee before: Zhejiang Sanhua Co., Ltd. |