CN212318817U - Electronic expansion valve, refrigerant circulation pipeline and air conditioner system - Google Patents
Electronic expansion valve, refrigerant circulation pipeline and air conditioner system Download PDFInfo
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- CN212318817U CN212318817U CN202022064983.9U CN202022064983U CN212318817U CN 212318817 U CN212318817 U CN 212318817U CN 202022064983 U CN202022064983 U CN 202022064983U CN 212318817 U CN212318817 U CN 212318817U
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Abstract
The utility model discloses an electronic expansion valve, refrigerant circulation pipeline and air conditioner system, wherein, electronic expansion valve includes disk seat and needle subassembly, the disk seat forms has the main valve chamber, the needle subassembly includes the needle cover of cover locating the main valve intracavity, the needle cover has the needle cover chamber, a wall in needle cover chamber is formed with the main valve mouth, the main valve mouth includes first water conservancy diversion hole section, second water conservancy diversion hole section and rectification hole section, the rectification hole section is connected with first water conservancy diversion hole section, the aperture of rectification hole section is greater than the aperture of first water conservancy diversion hole section, so that be step setting between the internal wall face of rectification hole section and first water conservancy diversion hole section, electronic expansion valve at work, when the refrigerant flows through the rectification hole section, can correspond step department local formation torrent in the rectification hole section, torrent at this moment can lead the refrigerant flow of the middle part position department that flows through the main valve mouth, play the effect of flexible water conservancy diversion, the flow state of main valve mouth department has been improved, effectively reducing the noise of the refrigerant.
Description
Technical Field
The utility model relates to an electronic expansion valve technical field, in particular to electronic expansion valve, refrigerant circulation pipeline and air conditioner system.
Background
At present, the electronic expansion valve has stronger refrigerant sound in the using process, air conditioner manufacturers generally need to add a transition pipe or a capillary pipe before and after throttling when using the electronic expansion valve, on one hand, the noise reduction effect is not obvious and the universality is not realized, on the other hand, the complexity of a pipeline is increased, the pipeline space is increased, welding spots are increased, the leakage risk is increased, in addition, the production efficiency is reduced, the manufacturing cost is increased, and therefore, the structure of the electronic expansion valve needs to be optimized.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing an electronic expansion valve, refrigerant circulation pipeline and air conditioner system aims at optimizing electronic expansion valve's structure to improve electronic expansion valve's refrigerant sound.
In order to achieve the above object, the utility model provides an electronic expansion valve, include:
a valve seat formed with a main valve cavity; and the number of the first and second groups,
the valve needle assembly is arranged in the valve needle sleeve in the main valve cavity through a sleeve, the valve needle sleeve is provided with a needle sleeve cavity, one end wall of the needle sleeve cavity is provided with a main valve opening, the main valve opening comprises a first flow guide hole section, a second flow guide hole section and a rectifying hole section, the first flow guide hole section and the second flow guide hole section are distributed in the direction of the outer end of the main valve opening along the direction, the rectifying hole section is connected with the first flow guide hole section, and the aperture of the rectifying hole section is larger than that of the first flow guide hole section, so that the rectifying hole section and the inner wall face of the first flow guide hole section are in stepped arrangement.
In an embodiment, the first guiding hole section has a hole diameter D, and the rectifying hole section has a hole diameter D1And D is1/D≥2。
In one embodiment, the valve needle assembly further comprises a valve needle disposed in the valve needle sleeve, a needle tip portion of the valve needle is at least partially disposed in the main orifice, and a distance L is provided between an end surface of the needle tip portion and a bottom wall surface of the needle sleeve cavity;
the length of the first flow guide hole section is L1The length of the rectifying hole section is L2The length of the second flow guide hole section is L3And L is1+L2+L3≤L≤1.5(L1+L2+L3)。
In one embodiment, the end of the valve needle sleeve corresponding to the main valve port is protruded out of the main valve cavity to form a protruded part;
the electronic expansion valve also comprises a vertical connecting pipe, one end of the vertical connecting pipe is sleeved outside the protruding part, and the inner diameter of the vertical connecting pipe is DL；
The inner diameter of the port of the main valve port is D2And 0.1 ≦ (D)L-D2)/D2≤0.4。
In one embodiment, the diameter of the rectifying hole section is D1，0.65≤D1/D2≤0.85。
In one embodiment, the outer side surface of the protruding portion is arranged in a step shape, and the protruding portion comprises a first protruding section and a second protruding section, wherein the first protruding section and the second protruding section are sequentially connected in the direction towards the outer end of the main valve port;
the vertical connecting pipe is sleeved outside the first protruding section, and a liquid retaining gap is formed between the second protruding section and the vertical connecting pipe.
In an embodiment, in a direction toward the outer end of the main valve port, an inner diameter of the second flow guide hole section is gradually increased, and an inner wall surface at a port of the second flow guide hole section is connected with an outer side surface of the second protruding section.
In one embodiment, the first protruding section has a length L4The length of the second protruding section is L5And 0.4. ltoreq. L4/L5≤0.85。
In one embodiment, the length of the rectifying hole segment is L2The depth of the second guide hole section is L3And 0.4 is less than or equal to (L)2+L3)/(L4+L5)≤0.85。
In one embodiment, the inner side wall of the needle sleeve cavity is provided with a main overflow hole communicated with the main valve cavity.
In one embodiment, the electronic expansion valve further comprises a cross connection pipe communicated with the main valve cavity, and the cross connection pipe is arranged along the radial extension of the valve needle sleeve;
and in the direction facing the outer end of the main valve port, the main overflow hole and the transverse connecting pipe are arranged in a staggered manner.
In one embodiment, an included angle beta is formed between the central line of the main overflow hole and a radial plane of the valve needle sleeve, and the included angle beta is more than or equal to 30 degrees and less than or equal to 60 degrees.
In one embodiment, β is 45 °.
In one embodiment, the inner diameter of the needle sleeve cavity is DS；
The aperture of the main overflow hole is d and is 1.8mm<d<0.71DS。
In one embodiment, the main overflow hole is provided in plurality and is arranged at intervals along the circumferential direction of the main valve cavity.
In an embodiment, the valve needle assembly further includes a valve needle disposed in the valve needle sleeve, the valve needle includes a movable portion hermetically and slidably mounted in the valve needle sleeve, and a needle tip portion connected to the movable portion and at least partially disposed in the main valve port, the movable portion has a covering section at least partially covering the main overflow hole, and the movable portion is at least in the covering section and is in a reduction arrangement, so that an annular communicating cavity communicating with the main overflow hole is formed between the covering section and the valve needle sleeve.
In one embodiment, the outer diameter of the covering section is Df2The inner diameter of the needle sleeve cavity is DSAnd 0.8<Df2/DS<0.98。
In one embodiment, a distance between an end face of the covering section far away from the main valve port and an end face of the valve needle sleeve far away from the main valve port is LPAnd 0.8 is less than or equal to Lp/DS≤1.7。
In an embodiment, the valve needle assembly includes a valve needle, the valve needle is sleeved in the needle sleeve cavity, the valve needle is movably adjustable along a length direction of the valve needle sleeve, and a needle tip portion of the valve needle is at least partially arranged in the main valve orifice.
The utility model discloses still provide a media circulation pipeline, media circulation pipeline includes electronic expansion valve, electronic expansion valve includes:
a valve seat formed with a main valve cavity; and the number of the first and second groups,
the valve needle assembly is arranged in the valve needle sleeve in the main valve cavity through a sleeve, the valve needle sleeve is provided with a needle sleeve cavity, one end wall of the needle sleeve cavity is provided with a main valve opening, the main valve opening comprises a first flow guide hole section, a second flow guide hole section and a rectifying hole section, the first flow guide hole section and the second flow guide hole section are distributed in the direction of the outer end of the main valve opening along the direction, the rectifying hole section is connected with the first flow guide hole section, and the aperture of the rectifying hole section is larger than that of the first flow guide hole section, so that the rectifying hole section and the inner wall face of the first flow guide hole section are in stepped arrangement.
The utility model discloses still provide an air conditioner system, air conditioner system includes the media circulation line, the media circulation line includes electronic expansion valve, electronic expansion valve includes:
a valve seat formed with a main valve cavity; and the number of the first and second groups,
the valve needle assembly is arranged in the valve needle sleeve in the main valve cavity through a sleeve, the valve needle sleeve is provided with a needle sleeve cavity, one end wall of the needle sleeve cavity is provided with a main valve opening, the main valve opening comprises a first flow guide hole section, a second flow guide hole section and a rectifying hole section, the first flow guide hole section and the second flow guide hole section are distributed in the direction of the outer end of the main valve opening along the direction, the rectifying hole section is connected with the first flow guide hole section, and the aperture of the rectifying hole section is larger than that of the first flow guide hole section, so that the rectifying hole section and the inner wall face of the first flow guide hole section are in stepped arrangement.
In the technical proposal provided by the utility model, the valve seat is provided with a main valve cavity, the valve needle sleeve is arranged in the main valve cavity, a main valve port is formed on one end wall of the needle sleeve cavity, the main valve port comprises a first flow guide hole section, a second flow guide hole section and a flow straightening hole section, the first flow guide hole section and the second flow guide hole section are distributed in the direction facing the outer end of the main valve port, the flow straightening hole section is positioned between the first flow guide hole section and the second flow guide hole section, the rectifying hole section and the inner wall surface of the first flow guide hole section are arranged in a step manner, when the electronic expansion valve works, when the refrigerant flows through the rectifying hole section, turbulence is formed in the rectifying hole section corresponding to the local part of the step, and the turbulence can guide the refrigerant flowing through the middle position of the main valve port to play a role in flexible diversion, so that the flowing state of the refrigerant at the main valve port is improved, and the noise of the refrigerant is effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of an electronic expansion valve according to a first embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the needle hub and needle assembly of FIG. 1;
FIG. 3 is a cross-sectional structural schematic view of the valve needle hub of FIG. 1;
FIG. 4 is a schematic cross-sectional view of the valve needle of FIG. 1;
fig. 5 is a schematic cross-sectional view of a second embodiment of an electronic expansion valve according to the present invention;
FIG. 6 is a cross-sectional view of the needle hub and needle assembly of FIG. 5;
FIG. 7 is a cross-sectional structural view of the valve needle hub of FIG. 5;
figure 8 is a cross-sectional structural schematic view of the valve needle of figure 5.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
At present, the electronic expansion valve has stronger refrigerant sound in the using process, air conditioner manufacturers generally need to add a transition pipe or a capillary pipe before and after throttling when using the electronic expansion valve, on one hand, the noise reduction effect is not obvious and the universality is not realized, on the other hand, the complexity of a pipeline is increased, the pipeline space is increased, welding spots are increased, the leakage risk is increased, in addition, the production efficiency is reduced, the manufacturing cost is increased, and therefore, the structure of the electronic expansion valve needs to be optimized.
In view of this, the present invention provides an electronic expansion valve, wherein fig. 1 to 8 are schematic structural diagrams of an embodiment of the electronic expansion valve provided by the present invention.
Referring to fig. 1 to 4, the electronic expansion valve 100 includes a valve seat 1 and a valve needle assembly 2, the valve seat 1 forms a main valve cavity 11, the valve needle assembly 2 includes a valve needle sleeve 21 sleeved in the main valve cavity 11, the valve needle sleeve 21 has a needle sleeve cavity 211, an end wall of the needle sleeve cavity 211 forms a main valve opening 212, the main valve opening 212 includes a first guide hole section 2121, a second guide hole section 2122 and a rectifying hole section 2123 located between the first guide hole section 2121 and the second guide hole section 2122, the first guide hole section 2121 is connected to the rectifying hole section 2123, and an aperture of the rectifying hole section 2123 is larger than an aperture of the first guide hole section 2121, so that the rectifying hole section 2123 and an inner wall surface of the first guide hole section 2121 are arranged in a step.
In the technical solution provided by the present invention, the valve seat 1 is formed with a main valve cavity 11, the valve needle sleeve 21 is sleeved in the main valve cavity 11, a main valve opening 212 is formed on a end wall of the needle sleeve cavity 211, the main valve opening 212 includes a first guiding hole section 2121, a second guiding hole section 2122 distributed in a direction toward an outer end of the main valve opening 212, and a rectifying hole section 2123 located between the first guiding hole section 2121 and the second guiding hole section 2122, a step is formed between the rectifying hole section 2123 and an inner wall surface of the first guiding hole section 2121, when the electronic expansion valve 100 operates, when a refrigerant flows through the rectifying hole section 2123, the refrigerant corresponding to the step is locally formed into a turbulent flow in the rectifying hole section 2123, the turbulent flow at this time can guide the refrigerant flowing through a middle position of the main valve opening 212 to flow, so as to play a role of flexible flow guiding, thereby improving a flowing state of the main valve opening 212, effectively reducing the noise of the refrigerant.
It should be noted that the valve needle assembly 2 further includes a valve needle 22, the valve needle sleeve 21 is disposed in the needle sleeve cavity 211, the valve needle 22 is movably adjustable along the length direction of the valve needle sleeve 21, a needle tip portion 221 of the valve needle 22 is at least partially disposed in the main valve port 212, and a gap between the needle sleeve cavity 211 and the main valve port 212 is adjusted by controlling the movement of the valve needle 22 along the length direction of the valve needle sleeve 21, so as to conduct the main valve cavity 11 and the main valve port 212, thereby changing the pressure of the liquid in the main valve cavity 11 and the main valve port 212.
In addition, the electronic expansion valve 100 further includes a driving mechanism for driving the valve needle 22, the driving mechanism includes a rotor structure, a stator structure, a screw driving structure, a rotation stopping structure, and the like, and the above structures are mutually matched to realize the movable adjustment of the valve needle 22 along the length direction of the valve needle sleeve 21, and it should be noted that the driving mechanism is used in the electronic expansion valve 100 of the prior art, and will not be described in detail here, and the sealing structure in the whole electronic expansion valve 100 is used in the electronic expansion valve 100 of the prior art, and will not be described in detail here.
In the flow path of the electronic expansion valve 100, the liquid flows in or out from the side direction of the electronic expansion valve 100, and the liquid correspondingly flows out or flows in from the axial direction of the electronic expansion valve 100, in order to reduce the noise of the refrigerant on the whole flow path, in the embodiment of the present invention, the related structure on the transverse flow path is improved, and the related structure on the vertical flow path is also improved.
In the structural improvement of the vertical flow path, mainly aiming at the structural optimization of the main valve port 212, as described above, the flow straightening hole section 2123 is added between the first flow guide hole section 2121 and the second flow guide hole section 2122 to play a role of flexible flow guide, so as to improve the flow state of the refrigerant at the main valve port 212 and effectively reduce the noise of the refrigerant, it should be noted that the number of the flow straightening hole sections 2123 is not limited, and may be one, two or more.
In the following, only one of the rectifying hole sections 2123 is included for explanation, and the size correlation between the hole sections of the main valve port 212 also affects the refrigerant noise, in an embodiment, the hole diameter of the first guiding hole section 2121 is D, and the hole diameter of the rectifying hole section 2123 is D1And D is1D is more than or equal to 2, on one hand, the flowing of the refrigerant is fully considered, on the other hand, a certain liquid guide vortex ring is also required to be formed at the corresponding step, the factors are comprehensively considered, and D is1the/D is more than or equal to 2, the noise of the refrigerant can be obviously reduced, and the effect is better.
The needle 22 limits an inner contour of a middle position of the fluid flowing into or out of the main valve port 212, the inner sidewall of the main valve port 212 limits an outer contour of an edge position of the fluid flowing into or out of the main valve port 212, both of which have a large influence on the flow of the refrigerant, in one embodiment, the needle assembly 2 further includes the needle 22 disposed in the needle sheath 21, the needle tip portion 221 of the needle 22 is at least partially disposed in the main valve port 212, a distance between an end surface of the needle tip portion 221 and a bottom wall surface of the needle sheath cavity 211 is L, and the length of the first guide hole section 2121 is L1The length of the rectifying hole section 2123 is L2The length of the second guide hole section 2122 is L3And L is1+L2+L3≤L≤1.5(L1+L2+L3) The needle tip 221 of the valve needle 22 is too short to achieve a good flow guiding effect, and the needle tip 221 of the valve needle 22 is too long to increase the processing difficulty and the cost.
In an embodiment, the end of the valve needle sheath 21 corresponding to the main valve port 212 is protruded out of the main valve cavity 11 to form a protruded portion 213, the electronic expansion valve 100 further includes a vertical connection tube 3, one end of the vertical connection tube 3 is sleeved outside the protruded portion 213, and an inner diameter of the vertical connection tube 3 is DLThe main valve port 212 has an internal diameter D2And 0.1 ≦ (D)L-D2)/D2Not more than 0.4, too small ratio can not achieve the guiding effect, too large ratio can cause the guiding effect to be too strong, and can form stronger secondary flow before the second contraction guiding section, and not more than 0.1 (D)L-D2)/D2Not more than 0.4 can play a better guiding role and weaken secondary flow, and has better flow guiding effect.
In one embodiment, the rectifying hole section 2123 has a hole diameter D1，0.65≤D1/D2And the flow guiding amount of the refrigerant between the second flow guiding hole section 2122 and the rectifying hole section 2123 is less than or equal to 0.85.
Referring to fig. 4 to 8, in a second embodiment of the electronic expansion valve according to the present invention, in this embodiment, the outer side of the protruding portion 213 is disposed in a step arrangement, and in a direction toward the outer end of the main valve port 212, the protruding portion 213 includes a first protruding section 2131 with a larger outer diameter and a second protruding section 2132 with a smaller outer diameter, the vertical pipe 3 is sleeved outside the first protruding section 2131, and the second protruding section 2132 and the vertical pipe 3 form a liquid-retaining gap 31 therebetween, at this time, the refrigerant in the liquid-retaining gap 31 can guide the refrigerant flowing through the inner wall of the vertical pipe 3, so as to achieve a flexible flow guiding effect, improve a flowing state of the refrigerant at the main valve port 212, reduce friction between the refrigerant and the protruding portion 213, and improve noise of the electronic expansion valve 100.
Further, in an embodiment, in a direction toward the outer end of the main valve port 212, the inner diameter of the second fluid guiding hole section 2122 is gradually increased, and an inner wall surface at the port of the second fluid guiding hole section 2122 is connected to an outer side surface of the second protruding section 2132, so that friction between a refrigerant and the protruding portion 213 is further reduced, and noise of the refrigerant of the electronic expansion valve 100 is improved.
The size of the liquid retention gap 31 is also a factor affecting the noise of the refrigerant, and in one embodiment, the length of the first protruding section 2131 is L4The length of the second protruding section 2132 is L5And 0.4. ltoreq. L4/L5Is less than or equal to 0.85, and in the size relation range, the refrigerant noise of the electronic expansion valve 100 is obviously improved, and the electronic expansion valve has a better effect.
In addition, the dimensional relationship between the inner wall structure of the main valve port 212 and the outer side surface structure of the protruding portion 213 also affects the refrigerant noise, and in one embodiment, the length of the rectifying hole section 2123 is L2The depth of the second guide hole section 2122 is L3And 0.4 is less than or equal to (L)2+L3)/(L4+L5) Is less than or equal to 0.85, and in the size relation range, the refrigerant noise of the electronic expansion valve 100 is obviously improved, and the electronic expansion valve has a better effect.
In an embodiment, the electronic expansion valve 100 further includes a cross connection pipe 4 communicated with the main valve cavity 11, the cross connection pipe 4 extends along a radial direction of the needle cover 21 and is arranged toward an outer end of the main valve port 212, the main overflow hole 214 and the cross connection pipe 4 are arranged in a staggered manner, so that an impact kinetic energy of a refrigerant on a flow of the refrigerant is reduced, the refrigerant is introduced from the cross connection pipe 4 and enters the needle cover cavity 211 from the main overflow hole 214 after filling the main valve cavity 11, or the refrigerant enters the main valve cavity 11 from the needle cover cavity 211 and is led out from the cross connection pipe 4 after filling the main valve cavity 11, so as to reduce a flow rate of the refrigerant impacting the needle 22, reliability and durability are improved.
It should be noted that a plurality of main overflow holes 214 are arranged and spaced along the circumferential direction of the main valve cavity 11, so as to ensure the fluidity of the refrigerant between the main valve cavity 11 and the needle hub cavity 211.
In order to avoid abnormal refrigerant noise caused by the refrigerant directly impacting the valve needle 22, in an embodiment, an included angle β is formed between the center line of the main overflow hole 214 and a radial plane of the valve needle sleeve 21, and β is greater than or equal to 30 ° and less than or equal to 60 °, and a preferred value is β is greater than or equal to 45 °, so that the refrigerant directly impacting the valve needle 22 is reduced as much as possible under the condition of ensuring the flow velocity of the refrigerant, and the refrigerant noise is further reduced.
In one embodiment, the inner diameter of the needle hub cavity 211 is DSThe diameter of the main overflow hole 214 is d and is 1.8mm<d<0.71DSWithin this range of the dimensional relationship, the refrigerant noise of the electronic expansion valve 100 is improved significantly, and the effect is better, and in addition, the lower edge of the main overflow hole 214 may be disposed adjacent to the bottom wall of the main valve chamber 11.
In order to reduce the play between the needle hub 21 and the valve sleeve, the gap between the two is small. However, when the overflow hole is enlarged, the valve needle sheath 21 will block a portion of the overflow hole in the fully closed state, which may result in a blockage of the flow pattern, which, in one embodiment, the valve needle assembly 2 further comprises a valve needle 22 arranged in the valve needle sleeve 21, the valve needle 22 comprises a movable part 222 which is hermetically and slidably arranged in the valve needle sleeve 21, and a needle tip portion 221 connected to the movable portion 222 and disposed at least partially within the main valve port 212, the movable portion 222 has a covering section 2221 at least partially covering the main overflow hole 214, the movable portion 222 is at least arranged in a reduced manner at the covering section 2221, so that an annular communicating cavity 5 communicating with the main overflow hole 214 is formed between the covering section 2221 and the valve needle sleeve 21, the covered part of the main overflow hole 214 is communicated through the annular communicating cavity 5, so that the influence on the flowing of the refrigerant is reduced, and the efficiency of the electronic expansion valve 100 is improved.
Specifically, in an embodiment, the outer diameter of the covering section 2221 is Df2The inner diameter of the needle sleeve cavity 211 is DSAnd 0.8<Df2/DS<0.98, in this dimensional relationship range, the flow state of the refrigerant is improved.
In an embodiment, a distance between an end surface of the covering section 2221 away from the main valve port 212 and an end surface of the valve needle sleeve 21 away from the main valve port 212 is LPAnd 0.8 is less than or equal to Lp/DSLess than or equal to 1.7, reduces the vibration of the valve needle 22 caused by the impact of the refrigerant, obviously improves the noise of the refrigerant of the electronic expansion valve 100, and has better effect.
The utility model discloses still provide a refrigerant circulation pipeline, refrigerant circulation pipeline includes electronic expansion valve 100, refrigerant circulation pipeline includes above-mentioned electronic expansion valve 100's whole technical characteristic, also consequently has the technical effect that above-mentioned whole technical characteristic brought, and here is no longer repeated one by one.
The utility model discloses still provide an air conditioner system, air conditioner system includes refrigerant circulation pipeline, refrigerant circulation pipeline includes electronic expansion valve 100, air conditioner system includes the whole technical characteristics of above-mentioned refrigerant circulation pipeline, also consequently has the technical effect that the whole technical characteristics of above-mentioned brought, and here is no longer repeated one by one.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (21)
1. An electronic expansion valve, comprising:
a valve seat formed with a main valve cavity; and the number of the first and second groups,
the valve needle assembly is arranged in the valve needle sleeve in the main valve cavity through a sleeve, the valve needle sleeve is provided with a needle sleeve cavity, one end wall of the needle sleeve cavity is provided with a main valve opening, the main valve opening comprises a first flow guide hole section, a second flow guide hole section and a rectifying hole section, the first flow guide hole section and the second flow guide hole section are distributed in the direction of the outer end of the main valve opening along the direction, the rectifying hole section is connected with the first flow guide hole section, and the aperture of the rectifying hole section is larger than that of the first flow guide hole section, so that the rectifying hole section and the inner wall face of the first flow guide hole section are in stepped arrangement.
2. The electronic expansion valve of claim 1, wherein the first orifice section has a bore diameter of D, and the commutating orifice section has a bore diameter of D1And D is1/D≥2。
3. The electronic expansion valve of claim 1, wherein the valve needle assembly further comprises a valve needle disposed within the valve needle sleeve, wherein a needle tip portion of the valve needle is at least partially disposed within the valve main orifice, and wherein an end surface of the needle tip portion is spaced apart from a bottom wall surface of the needle sleeve cavity by a distance L;
the length of the first flow guide hole section is L1The length of the rectifying hole section is L2The length of the second flow guide hole section is L3And L is1+L2+L3≤L≤1.5(L1+L2+L3)。
4. The electronic expansion valve according to claim 1, wherein the end of the valve needle sheath corresponding to the main valve port protrudes outside the main valve chamber to form a protruding portion;
the electronic expansion valve also comprises a vertical connecting pipe, one end of the vertical connecting pipe is sleeved outside the protruding part, and the inner diameter of the vertical connecting pipe is DL；
The inner diameter of the port of the main valve port is D2And 0.1 ≦ (D)L-D2)/D2≤0.4。
5. The electronic expansion valve of claim 4, wherein the diameter of the rectifying hole section is D1，0.65≤D1/D2≤0.85。
6. The electronic expansion valve according to claim 4, wherein the outer side surface of the protruding portion is stepped toward the outer end of the main valve port, and the protruding portion includes a first protruding section having a larger outer diameter and a second protruding section having a smaller outer diameter, which are connected in sequence;
the vertical connecting pipe is sleeved outside the first protruding section, and a liquid retaining gap is formed between the second protruding section and the vertical connecting pipe.
7. The electronic expansion valve according to claim 6, wherein the inner diameter of the second fluid guide hole section is gradually increased in a direction toward the outer end of the main valve port, and an inner wall surface at the port of the second fluid guide hole section is connected to an outer side surface of the second protrusion section.
8. The electronic expansion valve of claim 6, wherein the first protruding section has a length L4The length of the second protruding section is L5And 0.4. ltoreq. L4/L5≤0.85。
9. The electronic expansion valve of claim 4, wherein the length of the commutating hole segments is L2The depth of the second guide hole section is L3And 0.4 is less than or equal to (L)2+L3)/(L4+L5)≤0.85。
10. The electronic expansion valve of claim 1, wherein the inner sidewall of the needle hub chamber is provided with a main overflow aperture communicating with the main valve chamber.
11. The electronic expansion valve of claim 10, further comprising a cross-over tube in communication with the primary valve chamber, the cross-over tube extending radially of the valve needle sheath;
and in the direction facing the outer end of the main valve port, the main overflow hole and the transverse connecting pipe are arranged in a staggered manner.
12. The electronic expansion valve of claim 10, wherein an angle β is formed between a centerline of the main spill orifice and a radial plane of the needle guard sleeve, and β is between 30 ° and 60 °.
13. The electronic expansion valve of claim 12, wherein β is 45 °.
14. The electronic expansion valve of claim 10, wherein the needle hub lumen has an inner diameter DS；
The orifice of the main overflow orificeDiameter d, 1.8mm<d<0.71DS。
15. The electronic expansion valve of claim 10, wherein the primary spill orifice is provided in plurality and spaced circumferentially of the primary valve chamber.
16. The electronic expansion valve of claim 10, wherein the valve needle assembly further comprises a valve needle disposed within the valve needle sleeve, the valve needle comprising a movable portion sealingly and slidably mounted within the valve needle sleeve, and a needle tip portion connected to the movable portion and at least partially disposed within the main valve orifice, the movable portion having a cover section at least partially covering the main overflow aperture, the movable portion being tapered at least at the cover section to form an annular communication chamber between the cover section and the valve needle sleeve communicating with the main overflow aperture.
17. The electronic expansion valve of claim 16, wherein the cover section has an outer diameter Df2The inner diameter of the needle sleeve cavity is DSAnd 0.8<Df2/DS<0.98。
18. The electronic expansion valve of claim 17, wherein the distance L between the end surface of the cover section remote from the main valve port and the end surface of the valve needle sheath remote from the main valve portPAnd 0.8 is less than or equal to Lp/DS≤1.7。
19. The electronic expansion valve of claim 1, wherein the valve needle assembly comprises a valve needle, the valve needle is sleeved in the needle sleeve cavity, the valve needle is movably adjustable along a length direction of the valve needle sleeve, and a needle tip portion of the valve needle is at least partially disposed in the main valve port.
20. A refrigerant circulation line, comprising the electronic expansion valve according to any one of claims 1 to 19.
21. An air conditioner system comprising the refrigerant circulation line as claimed in claim 20.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022064983.9U CN212318817U (en) | 2020-09-18 | 2020-09-18 | Electronic expansion valve, refrigerant circulation pipeline and air conditioner system |
| PCT/CN2021/106390 WO2022057421A1 (en) | 2020-09-18 | 2021-07-15 | Electronic expansion valve, refrigerant circulation pipeline, and air conditioner system |
| EP21868250.8A EP4160068A4 (en) | 2020-09-18 | 2021-07-15 | Electronic expansion valve, refrigerant circulation pipeline, and air conditioner system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022064983.9U CN212318817U (en) | 2020-09-18 | 2020-09-18 | Electronic expansion valve, refrigerant circulation pipeline and air conditioner system |
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| CN212318817U true CN212318817U (en) | 2021-01-08 |
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| CN202022064983.9U Active CN212318817U (en) | 2020-09-18 | 2020-09-18 | Electronic expansion valve, refrigerant circulation pipeline and air conditioner system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022057421A1 (en) * | 2020-09-18 | 2022-03-24 | 广东美的制冷设备有限公司 | Electronic expansion valve, refrigerant circulation pipeline, and air conditioner system |
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2020
- 2020-09-18 CN CN202022064983.9U patent/CN212318817U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022057421A1 (en) * | 2020-09-18 | 2022-03-24 | 广东美的制冷设备有限公司 | Electronic expansion valve, refrigerant circulation pipeline, and air conditioner system |
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