CN210978691U - Valve core for electronic expansion valve - Google Patents
Valve core for electronic expansion valve Download PDFInfo
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- CN210978691U CN210978691U CN201921603916.0U CN201921603916U CN210978691U CN 210978691 U CN210978691 U CN 210978691U CN 201921603916 U CN201921603916 U CN 201921603916U CN 210978691 U CN210978691 U CN 210978691U
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Abstract
The utility model discloses a case for electronic expansion valve, including rotor core and the hollow rotor section of thick bamboo of cover outside this rotor core, change positioner rib and constant head tank on it, make the inner wall in constant head tank and direction section hole be the echelonment, keep inner wall thickness even, improved electronic expansion valve's working property.
Description
Technical Field
The utility model relates to an electronic expansion valve in air conditioner refrigeration or heat pump system field especially indicates to use the case in electronic expansion valve.
Background
It is known that electronic expansion valves are widely used in the field of air-conditioning refrigeration or heat pump systems to regulate the throttling, pressure reduction and flow rate of fluid, and the electronic expansion valves utilize the regulated parameters to generate signals, and control the voltage or current applied to a coil to generate a magnetic field according to a computer set program, so as to drive a valve core of a main valve body to rotate to change the flow area of a valve port, thereby achieving the purpose of automatically regulating the flow rate.
As shown in fig. 1 to 3, a valve core currently used in an electronic expansion valve is composed of a rotor cylinder 1 and a rotor core 2 sleeved in the rotor cylinder 1, a pair of strip-shaped positioning slots 101 penetrating through the entire inner wall of the rotor cylinder 1 is arranged in the rotor cylinder 1, a pair of strip-shaped positioning ribs 201 capable of being sleeved in the pair of strip-shaped positioning slots 101 is arranged on the outer wall of the rotor core 2, and the rotor cylinder 1 and the rotor core 2 are assembled after being matched and clamped in the strip-shaped positioning slots 101 and the strip-shaped positioning ribs 201. Because the pair of strip-shaped positioning grooves 101 penetrating through the whole inner wall of the rotor barrel 1 is arranged in the rotor barrel 1, the position of the rotor barrel 1 provided with the strip-shaped positioning grooves 101 is weaker than the positions of other side walls, namely, the position of the rotor provided with the positioning grooves has a weak point, so that the magnetic field distribution in the rotor during working is not uniform, the problems of unstable operation, deviation and the like of the rotor during working can be caused, and the function and the performance are poor; meanwhile, in order to ensure the working reliability of the whole valve core, the rotor cylinder 1 is made of neodymium iron boron which has the characteristic of hardness and brittleness, and therefore when the rotor is impacted by external force, weak points are easy to break, and certain quality hidden danger exists; at the moment, in order to ensure that the function and the performance of the rotor during working are not influenced and to ensure that the weak point is not easy to break, the wall of the whole rotor is made thicker, but the cost for producing the rotor is increased; in addition, the rotor of the current valve core is a magnetic rotor, and 10 pairs of magnetic poles are uniformly distributed on the peripheral wall of the magnetic rotor, so that the thickness of the inner side wall of the magnetic rotor is inconsistent, the phenomenon of nonuniform distribution of an internal magnetic field can be caused, and the phenomenon can cause the fluctuation of the whole expansion valve during working to be large, thereby affecting the performance of the expansion valve.
Disclosure of Invention
The utility model aims at overcoming the defects of the prior art and providing a valve core with reasonable structure, reliable quality, better performance and low cost.
In order to solve the technical problem, the utility model adopts the following technical scheme:
a valve core for an electronic expansion valve comprises a rotor core 2 and a hollow rotor barrel 1 sleeved outside the rotor core 2, wherein the rotor core 2 consists of a guide section 21 and a limit section 22 with the diameter smaller than that of the guide section 21, and an inner hole of the rotor barrel 1 is divided into a guide section hole 11 for the guide section 21 to be sleeved in a sliding manner and a limit section hole 12 for the limit section 22 to pass through in a sliding manner; the limiting section 22 penetrates through the limiting section hole 12 and extends out, and an installation groove 221 for installing an anti-falling clamp spring is formed in the extending end of the limiting section; the hole diameter of the limiting section hole 12 is smaller than the diameter of the guide section 21; the side wall of the end of the guide section 21 far away from the limiting section 22 is provided with a first positioning rib 211; the limiting section 22 is provided with a second positioning rib 222 on the section of the side wall located in the mounting groove 221; the outer end of the guide section hole 11 is provided with a first positioning groove 111 matched with the first positioning rib 211, and the inner side wall of the limiting section hole 12 is provided with a second positioning groove 121 into which the second positioning rib 222 can fall.
In the valve core of the electronic expansion valve, the second positioning groove 121 may penetrate through the entire inner side wall of the position limiting section hole 12, and the second positioning rib 222 may completely fall into the penetrating second positioning groove 121; the second positioning groove 121 may also be a stepped blind hole on the inner side wall of the limiting section hole 12, and the second positioning rib 222 can completely fall into the stepped blind hole type second positioning groove 121.
Further, the guide section 21 may have a length longer than the stopper section 22.
Further, the first positioning groove 111 is stepped with the inner wall of the guide section hole 11.
In the valve core for the electronic expansion valve, the rotor cylinder 1 is a magnetic rotor cylinder, and 10 pairs of magnetic poles are uniformly distributed on the peripheral wall of the magnetic rotor cylinder.
In the valve core of the electronic expansion valve, there are 2 first positioning ribs 211 and 2 second positioning ribs 222, which are symmetrically distributed on the side wall of the guide section 21 and the side wall of the limiting section 22, respectively; the number of the first positioning grooves 111 and the number of the second positioning grooves 121 are 2, and the first positioning grooves 111 and the second positioning grooves 121 are symmetrically distributed at the outer end of the guide section hole 11 and on the inner side wall of the limiting section hole 12 respectively.
According to above-mentioned electronic expansion valve's case, the utility model discloses an electronic expansion valve's case can have following several kinds of changes:
1. the number of the first positioning ribs 211 and the second positioning ribs 222 is 4, and the two pairs of the first positioning ribs 211 and the second positioning ribs 222 are symmetrically distributed on the side wall of the guide section 21 and the side wall of the limiting section 22 respectively; the number of the first positioning grooves 111 and the second positioning grooves 121 is 4, and the two pairs of the first positioning grooves 111 and the second positioning grooves 121 are symmetrically distributed at the outer end of the guide section hole 11 and on the inner side wall of the limiting section hole 12 respectively.
2. The number of the first positioning ribs 211 and the number of the second positioning ribs 222 are 6, and the first positioning ribs 211 and the second positioning ribs are symmetrically distributed on the side wall of the guide section 21 and the side wall of the limiting section 22 respectively; the number of the first positioning grooves 111 and the number of the second positioning grooves 121 are 6, and the first positioning grooves 111 and the second positioning grooves 121 are symmetrically distributed at the outer end of the guide section hole 11 and on the inner side wall of the limiting section hole 12 respectively.
Compared with the prior art, the beneficial effects of the utility model are that: because its first constant head tank 111 and second constant head tank 121 are established respectively at the guide section hole outer end department of rotor barrel hole and on the inner wall in spacing section hole, and first constant head tank 111 is the echelonment with the inner wall in this guide section hole, the lateral wall thickness of rotor barrel is unanimous like this for the inside lateral wall of rotor no longer has weak point, consequently the even job stabilization of magnetic field distribution during operation, just also do not need to make the whole body wall of rotor barrel thick a little too, thereby the cost of producing the rotor barrel has been saved, also guaranteed that the rotor barrel no longer has the quality hidden danger when receiving external force impact, consequently its quality is reliable. Meanwhile, the side wall thickness of the rotor barrel is consistent, so that the magnetic field inside the rotor barrel is uniformly distributed, the whole expansion valve is small in stable fluctuation during working, and the operation accuracy is good, so that the expansion valve is reasonable in structure, reliable in quality and low in cost.
The invention will be described in further detail with reference to the following detailed description and accompanying drawings:
[ description of the drawings ]
FIG. 1 is a perspective view (bottom view) of the valve cartridge at the present stage;
FIG. 2 is a perspective view (top view) of the valve cartridge at the present stage;
FIG. 3 is a schematic view of the installation of the valve cartridge at the present stage;
fig. 4 is a first perspective view (bottom view direction) of the present invention;
fig. 5 is a second schematic perspective view (top view direction) of the present invention;
fig. 6 is a schematic structural view of the present invention;
fig. 7 is an assembly schematic of the present invention;
fig. 8 is a schematic structural view of the rotor drum of the present invention.
[ detailed description ] embodiments
Example 1
A valve core for an electronic expansion valve, as shown in figures 4 to 8, comprises a rotor core 2 and a hollow rotor barrel 1 sleeved outside the rotor core 2. The rotor cylinder 1 can be a magnetic rotor cylinder, and 10 pairs of magnetic poles are uniformly distributed on the peripheral wall of the magnetic rotor cylinder. The rotor core 2 consists of a guide section 21 and a limit section 22 with the diameter smaller than that of the guide section 21, and an inner hole of the rotor cylinder 1 is divided into a guide section hole 11 for the guide section 21 to be sleeved in a sliding way and a limit section hole 12 for the limit section 22 to pass through in a sliding way; the limiting section 22 penetrates through the limiting section hole 12 and extends out, and an installation groove 221 for installing an anti-falling clamp spring is formed in the extending end of the limiting section; the aperture of the limiting section hole 12 is smaller than the diameter of the guide section 21, that is, the guide section 21 of the rotor core 2 cannot penetrate into the limiting section hole 12 after being sleeved into the inner hole of the rotor cylinder 1, so that the rotor core is prevented from sliding out of the limiting section hole; the side wall of the end of the guide section 21 far away from the limiting section 22 is provided with a first positioning rib 211; the limiting section 22 is provided with a second positioning rib 222 on the section of the side wall located in the mounting groove 221; the outer end of the guide section hole 11 is provided with a first positioning groove 111 matched with the first positioning rib 211, and the inner side wall of the limiting section hole 12 is provided with a second positioning groove 121 which penetrates through the whole inner side wall and can allow the second positioning rib 222 to fall into.
In the present embodiment, during assembly, the end of the rotor core 2 provided with the limiting section 22 is sleeved on the inner hole of the rotor barrel 1, and at this time, the outer side wall of the guiding section 21 is in contact with the inner side wall of the guiding section hole 11 to play a guiding role; then the rotor core 2 is slowly slid downwards under the guiding action of the guiding section 21, and along with the slow downward sliding of the rotor core 2, the limiting section 22 passes through the limiting section hole 12 and the end part of the limiting section is exposed outside the rotor barrel 1, and meanwhile, the first positioning rib 211 on the guiding section 21 and the second positioning rib 222 on the limiting section 22 fall into the first positioning groove 111 and the second positioning groove 121 respectively; finally, the anti-falling clamp spring is installed in the installation groove 221 of the extending end of the limiting section 22, and therefore the rotor barrel and the rotor core are assembled.
The guide section 21 is longer than the stopper section 22.
The first positioning groove 111 and the inner wall of the guide section hole 11 are stepped, that is, the first positioning groove 111 does not penetrate through the entire inner wall of the guide section hole.
The first positioning rib 211 and the second positioning rib 222 of this embodiment have 2 pairs, and they are symmetrically distributed on the side wall of the guiding section 21 and the side wall of the limiting section 22 respectively; the number of the first positioning grooves 111 and the number of the second positioning grooves 121 are 2, and the first positioning grooves 111 and the second positioning grooves 121 are symmetrically distributed at the outer end of the guide section hole 11 and on the inner side wall of the limiting section hole 12 respectively.
Example 2
In the case of a valve core for an electronic expansion valve, the second positioning groove 121 may also be a stepped blind hole on the inner side wall of the limiting section hole 12, and the second positioning rib 222 may completely fall into the stepped blind hole type second positioning groove 121. The number of the first positioning ribs 211 and the second positioning ribs 222 is 4, and the two pairs of the first positioning ribs 211 and the second positioning ribs 222 are symmetrically distributed on the side wall of the guide section 21 and the side wall of the limiting section 22 respectively; the number of the first positioning grooves 111 and the second positioning grooves 121 is 4, and the two pairs of the first positioning grooves 111 and the second positioning grooves 121 are symmetrically distributed at the outer end of the guide section hole 11 and on the inner side wall of the limiting section hole 12 respectively. The rest is the same as example 1.
Example 3
A valve core for an electronic expansion valve is characterized in that 6 first positioning ribs 211 and 6 second positioning ribs 222 are respectively and symmetrically distributed on the side wall of a guide section 21 and the side wall of a limiting section 22; the number of the first positioning grooves 111 and the number of the second positioning grooves 121 are 6, and the first positioning grooves 111 and the second positioning grooves 121 are symmetrically distributed at the outer end of the guide section hole 11 and on the inner side wall of the limiting section hole 12 respectively. The rest is the same as example 1.
Comparative example 1
The valve core on the electronic expansion valve is composed of a rotor barrel 1 and a rotor core 2 sleeved in the rotor barrel 1 by using the prior art, wherein the rotor barrel 1 can be a magnetic rotor barrel, and 10 pairs of magnetic poles are uniformly distributed on the peripheral wall of the magnetic rotor barrel. The rotor cylinder 1 is internally provided with a pair of strip-shaped positioning grooves 101 penetrating through the whole inner wall of the rotor cylinder, the outer wall of the rotor core 2 is provided with a pair of strip-shaped positioning ribs 201 capable of being sleeved on the pair of strip-shaped positioning grooves 101, and the rotor cylinder 1 and the rotor core 2 are assembled after being matched and clamped in through the respective strip-shaped positioning grooves 101 and the strip-shaped positioning ribs 201.
And (3) effect comparison:
1. 20 rotor cylinders 1 (specification of 15.8mm in outer diameter and 12mm in inner diameter) on the electronic expansion valves of the examples and the comparative examples were prepared, and the breakage rate of each group was observed by a 1-meter drop height test according to GB/T2423.8-1995 (free drop test method), and the test results are shown in Table 1;
2. 20 rotor cylinders 1 (with the specification of 15.8mm outside diameter and 12mm inside diameter) on the electronic expansion valves of the examples and the comparative examples were prepared and tested for radial crushing force according to GB/T6804-.
TABLE 1 comparison of strength of magnetic rotor barrels
3. The valve cores of the embodiments and the comparative examples are arranged in the electronic expansion valve, 20 valve cores are prepared respectively, the running state of the electronic expansion valve in the adjusting process is observed according to the same command parameters, and the test results are shown in table 2;
4. the valve cartridges of each example and comparative example were installed in electronic expansion valves (rated operating voltage specification DC 12V ± 1.2V) and 20 pieces of each were prepared, and the minimum response voltage of each electronic expansion valve was measured by lowering the voltage and observing whether the electronic expansion valve was operated, and the test results are shown in table 2.
TABLE 2 comparison of the Performance of the electronic expansion valve
As can be seen from table 1, since the first positioning groove 111 and the second positioning groove 121 of embodiments 1 to 3 are respectively disposed at the outer end of the guide section hole 11 and on the sidewall of the position-limiting section hole 12 of the rotor barrel 1, and the first positioning groove 111 and the inner wall of the guide section hole 11 are stepped, the wall thickness of the section of the rotor barrel where the guide section hole is located is consistent except for the small section of the wall thickness where the first positioning groove is located. Because the wall thickness of the rotor barrel is uniform, the rotor barrel is ensured not to have hidden quality troubles when being impacted by external force, the falling breakage rate is reduced, the radial crushing force is increased, the rotor barrel does not need to be thickened, the cost for producing the rotor barrel is saved, and the quality is more reliable.
It can be seen from table 2 that the electronic expansion valve assembled by the valve core of embodiments 1-3, during operation, the uniform work of the magnetic field distribution inside the valve core is stable, the minimum response voltage is also reduced, and the work is sensitive, therefore, the utility model discloses a quality is reliable.
The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and all equivalent changes and modifications made according to the content of the claims of the present invention should belong to the technical scope of the present invention.
Claims (9)
1. A valve core for an electronic expansion valve comprises a rotor core (2) and a hollow rotor barrel (1) sleeved outside the rotor core (2), wherein the rotor core (2) consists of a guide section (21) and a limiting section (22) with the diameter smaller than that of the guide section (21), and an inner hole of the rotor barrel (1) is divided into a guide section hole (11) for the guide section (21) to be sleeved in a sliding manner and a limiting section hole (12) for the limiting section (22) to pass through in a sliding manner; the limiting section (22) penetrates through the limiting section hole (12) and extends out, and an installation groove (221) for installing the anti-falling clamp spring is formed in the extending end of the limiting section; the aperture of the limiting section hole (12) is smaller than the diameter of the guide section (21); the device is characterized in that a first positioning rib (211) is arranged on the side wall of one end of the guide section (21) far away from the limiting section (22); the limiting section (22) is provided with a second positioning rib (222) on the section of side wall positioned in the mounting groove (221); the outer end of the guide section hole (11) is provided with a first positioning groove (111) matched with the first positioning rib (211), and the inner side wall of the limiting section hole (12) is provided with a second positioning groove (121) allowing the second positioning rib (222) to fall into.
2. The valve core for an electronic expansion valve according to claim 1, wherein the second positioning groove (121) penetrates the entire inner sidewall of the retainer segment hole (12), and the second positioning rib (222) can completely fall into the penetrating second positioning groove (121).
3. The valve core for an electronic expansion valve according to claim 1, wherein the second positioning groove (121) is a stepped blind hole on the inner side wall of the stop segment hole (12), and the second positioning rib (222) can completely fall into the stepped blind hole type second positioning groove (121).
4. The valve cartridge for an electronic expansion valve according to claim 1, wherein the guide section (21) has a length longer than the stopper section (22).
5. The valve cartridge for an electronic expansion valve according to claim 1, wherein the first positioning groove (111) is stepped with an inner wall of the pilot segment hole (11).
6. The valve cartridge for an electronic expansion valve according to claim 1, wherein the rotor cartridge (1) is a magnetic rotor cartridge having 10 pairs of magnetic poles uniformly distributed on a peripheral wall thereof.
7. The valve core for an electronic expansion valve according to any one of claims 1 to 6, wherein the first positioning rib (211) and the second positioning rib (222) are respectively 2 in number, and are symmetrically distributed on the side wall of the guide section (21) and the side wall of the limiting section (22); the first positioning groove (111) and the second positioning groove (121) are respectively provided with 2 pairs, and the two pairs are respectively and symmetrically distributed at the outer end of the guide section hole (11) and on the inner side wall of the limiting section hole (12).
8. The valve core for an electronic expansion valve according to any one of claims 1 to 6, wherein the first positioning rib (211) and the second positioning rib (222) are respectively provided with 4 pairs, and are symmetrically distributed on the side wall of the guide section (21) and the side wall of the limiting section (22); the number of the first positioning groove (111) and the number of the second positioning groove (121) are 4, and the two pairs of first positioning grooves and the two pairs of second positioning grooves are symmetrically distributed at the outer end of the guide section hole (11) and on the inner side wall of the limiting section hole (12) respectively.
9. The valve core for an electronic expansion valve according to any one of claims 1 to 6, wherein the first positioning rib (211) and the second positioning rib (222) are respectively 6 in three pairs, and are symmetrically distributed on the side wall of the guide section (21) and the side wall of the limiting section (22); the number of the first positioning grooves (111) and the number of the second positioning grooves (121) are 6, and the first positioning grooves and the second positioning grooves are symmetrically distributed at the outer end of the guide section hole (11) and on the inner side wall of the limiting section hole (12) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921603916.0U CN210978691U (en) | 2019-09-25 | 2019-09-25 | Valve core for electronic expansion valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921603916.0U CN210978691U (en) | 2019-09-25 | 2019-09-25 | Valve core for electronic expansion valve |
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| CN210978691U true CN210978691U (en) | 2020-07-10 |
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| CN201921603916.0U Active CN210978691U (en) | 2019-09-25 | 2019-09-25 | Valve core for electronic expansion valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500434A (en) * | 2019-09-25 | 2019-11-26 | 江西鸥迪铜业有限公司 | A kind of spool for electric expansion valve |
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2019
- 2019-09-25 CN CN201921603916.0U patent/CN210978691U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500434A (en) * | 2019-09-25 | 2019-11-26 | 江西鸥迪铜业有限公司 | A kind of spool for electric expansion valve |
| CN110500434B (en) * | 2019-09-25 | 2024-05-28 | 江西鸥迪铜业有限公司 | Valve core for electronic expansion valve |
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