CN107435753B - Electronic expansion valve and refrigeration equipment with same - Google Patents

Electronic expansion valve and refrigeration equipment with same Download PDF

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Publication number
CN107435753B
CN107435753B CN201610354894.3A CN201610354894A CN107435753B CN 107435753 B CN107435753 B CN 107435753B CN 201610354894 A CN201610354894 A CN 201610354894A CN 107435753 B CN107435753 B CN 107435753B
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CN
China
Prior art keywords
valve
electronic expansion
groove
valve seat
rotation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201610354894.3A
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Chinese (zh)
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CN107435753A (en
Inventor
不公告发明人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Sanhua Intelligent Controls Co Ltd
Original Assignee
Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Sanhua Intelligent Controls Co Ltd filed Critical Zhejiang Sanhua Intelligent Controls Co Ltd
Priority to CN201610354894.3A priority Critical patent/CN107435753B/en
Priority to KR1020187037229A priority patent/KR20190010632A/en
Priority to PCT/CN2017/085927 priority patent/WO2017202366A1/en
Priority to JP2018561243A priority patent/JP6797214B2/en
Publication of CN107435753A publication Critical patent/CN107435753A/en
Application granted granted Critical
Publication of CN107435753B publication Critical patent/CN107435753B/en
Active legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lift Valve (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Details Of Valves (AREA)

Abstract

The invention provides an electronic expansion valve and a refrigeration device with the same, wherein the electronic expansion valve comprises: a valve seat; the nut assembly is connected to the valve seat; the screw rod is movably arranged in the nut component; the valve seat core is positioned in the valve seat and is provided with a valve port; the valve needle comprises a main body part matched with the inner wall of the valve seat core and a needle head part which is positioned below the main body part and matched with the valve port, the valve needle is provided with a closing position for closing the valve port and an opening position for avoiding the valve port, and the screw rod drives the valve needle to move between the closing position and the opening position; and the noise reduction part comprises a first rotation stopping part and a second rotation stopping part which are matched with each other, one of the first rotation stopping part and the second rotation stopping part is arranged on the valve seat core or the nut component, and the other one is arranged on the main body part. The technical scheme of the invention can effectively solve the problem of high noise of the electronic expansion valve in the prior art.

Description

Electronic expansion valve and refrigeration equipment with same
Technical Field
The invention relates to the field of refrigeration, in particular to an electronic expansion valve and refrigeration equipment with the same.
Background
As shown in fig. 1, the electronic expansion valve is mainly composed of a coil and a valve body, wherein the valve body is composed of a valve seat, a valve seat core 1, a first connecting pipe 3, a second connecting pipe 4, a housing, a rotor component 5, a nut component 6, a screw rod component 7, a valve needle 8, a coil fixing frame and other components. In the prior art construction, both the valve needle 8 and the seat core 1 are metal. When the electronic expansion valve works, the valve needle 8 rotates back and forth in the inner hole of the valve seat core 1. In the continuous valve opening and closing process of the electronic expansion valve, friction and impact can be generated between the outer circle of the valve needle 8 and the inner hole of the valve seat core 1, corresponding sound can be generated, and noise is generated. Especially when the expansion valve is installed in the indoor unit, system noise is increased, thereby affecting comfort of the air conditioner.
Disclosure of Invention
The invention mainly aims to provide an electronic expansion valve and refrigeration equipment with the same, and aims to solve the problem that the electronic expansion valve in the prior art is high in noise.
In order to achieve the above object, according to one aspect of the present invention, there is provided an electronic expansion valve comprising: a valve seat; the nut assembly is connected to the valve seat; the screw rod is movably arranged in the nut component; the valve seat core is positioned in the valve seat and is provided with a valve port; the valve needle comprises a main body part matched with the inner wall of the valve seat core and a needle head part which is positioned below the main body part and matched with the valve port, the valve needle is provided with a closing position for closing the valve port and an opening position for avoiding the valve port, and the screw rod drives the valve needle to move between the closing position and the opening position; and the noise reduction part comprises a first rotation stopping part and a second rotation stopping part which are matched with each other, one of the first rotation stopping part and the second rotation stopping part is arranged on the valve seat core or the nut component, and the other one is arranged on the main body part.
Furthermore, the first rotation stopping part is a first protrusion, and the second rotation stopping part is a first groove matched with the first protrusion.
Further, the first protrusion is arranged on the nut component, the valve seat core is provided with a notch avoiding the first protrusion, and the first groove is arranged on the main body part.
Further, a gap is provided between the first protrusion and the first groove.
Furthermore, the first rotation stopping part is a rotation stopping pin, a mounting part for mounting the rotation stopping pin is arranged on the side wall of the valve seat core or the valve needle, and the second rotation stopping part is a second groove matched with the rotation stopping pin.
Further, the installation part is an installation hole, the axis of the rotation stopping pin is perpendicular to the axis of the valve needle, and the end part of the rotation stopping pin is matched with the second groove.
Further, the height of the rotation stopping pin protruding out of the valve seat core or the valve needle is smaller than the depth of the second groove.
Furthermore, the installation part is a third groove, the axis of the rotation stopping pin is parallel to the axis of the valve needle, one part of the rotation stopping pin is arranged in the second groove, and the other part of the rotation stopping pin is arranged in the third groove.
Further, the diameter of the rotation stopping pin is smaller than the sum of the groove depths of the second groove and the third groove.
Further, the valve seat core includes the valve core case body and is located the top of valve core case body and is independent of the snap ring of valve core case body, and first portion of splines sets up on the inner wall of snap ring, and first portion of splines is the second arch, and the second portion of splines is for the fourth recess with the protruding complex of second.
Further, the height of the second protrusion is smaller than the groove depth of the fourth groove.
According to another aspect of the present invention, there is provided a refrigeration apparatus comprising an electronic expansion valve, the electronic expansion valve being the electronic expansion valve described above.
By applying the technical scheme of the invention, the electronic expansion valve comprises the noise reduction part, the noise reduction part comprises a first rotation stopping part and a second rotation stopping part, one of the first rotation stopping part and the second rotation stopping part is arranged on the valve seat core or the nut component, and the other one is arranged on the main body part. When a screw rod of the electronic expansion valve drives a valve needle to move back and forth between an opening position and a closing position, the first rotation stopping part and the second rotation stopping part can be matched with each other, the situation that the main body part of the valve needle and the valve seat core rotate relatively is avoided, friction and impact between the main body part and the valve seat core due to relative rotation are reduced, noise is reduced, the comfort level is increased, and the problem of high noise of the electronic expansion valve is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic longitudinal sectional view showing an electronic expansion valve according to the related art;
fig. 2 is a schematic longitudinal sectional view of a first embodiment of an electronic expansion valve according to the present invention;
fig. 3 shows a schematic perspective view of a valve needle of the electronic expansion valve of fig. 2;
figure 4 shows a schematic longitudinal sectional perspective view of the valve seat core of figure 2;
FIG. 5 shows a schematic front view of the valve seat core of FIG. 4;
fig. 6 is a perspective view illustrating a rotation stopping pin of the electronic expansion valve of fig. 2;
fig. 7 is a schematic longitudinal sectional view showing a second embodiment of the electronic expansion valve according to the present invention;
fig. 8 is a perspective view illustrating a valve seat core of the electronic expansion valve of fig. 7;
figure 9 shows a schematic longitudinal section of the valve seat core of figure 8;
figure 10 shows a schematic perspective view of the valve needle of figure 7;
figure 11 shows a longitudinal sectional perspective view of the valve needle of figure 10;
fig. 12 is a perspective view illustrating a rotation stopping pin of the electronic expansion valve of fig. 7;
fig. 13 is a schematic longitudinal sectional view showing a fourth embodiment of the electronic expansion valve according to the present invention;
fig. 14 is a perspective view illustrating a snap ring of the electronic expansion valve of fig. 13;
figure 15 shows a schematic perspective view of the valve needle of figure 13;
fig. 16 is a schematic longitudinal sectional view showing an embodiment five of the electronic expansion valve according to the present invention;
fig. 17 is a perspective view illustrating a nut assembly of the electronic expansion valve of fig. 16;
FIG. 18 shows a longitudinal cross-sectional schematic view of the nut assembly of FIG. 17; and
fig. 19 is a perspective view illustrating a valve seat core of the electronic expansion valve of fig. 16.
Wherein the figures include the following reference numerals:
10. a valve seat core; 11. a valve port; 12. a valve core seat body; 13. a snap ring; 20. a valve needle; 21. a main body portion; 22. a needle head section; 31. a second groove; 32. mounting holes; 33a, a rotation stop pin; 33b, a rotation stop pin; 34. a third groove; 35. a second protrusion; 36. a fourth groove; 40. a rotor; 50. a screw rod; 60. a nut assembly.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 2 to 6, the electronic expansion valve of the first embodiment includes a valve seat, a nut assembly 60, a screw 50, a valve seat core 10, a valve needle 20, and a noise reduction portion. Wherein the nut assembly 60 is attached to the valve seat; the lead screw 50 is movably disposed within the nut assembly 60; the valve seat core 10 is positioned in the valve seat and is provided with a valve port 11; the valve needle 20 comprises a main body part 21 matched with the inner wall of the valve seat core 10 and a needle head part 22 positioned below the main body part 21 and matched with the valve port 11, the valve needle 20 has a closing position closing the valve port 11 and an opening position avoiding the valve port 11, and the screw rod 50 drives the valve needle 20 to move between the closing position and the opening position; the noise reduction portion includes a first rotation stop portion and a second rotation stop portion that are fitted to each other, one of the first rotation stop portion and the second rotation stop portion is provided on the valve seat core 10, and the other is provided on the main body portion 21.
In the first technical solution of the application embodiment, the electronic expansion valve includes a noise reduction portion, the noise reduction portion includes a first rotation stopping portion and a second rotation stopping portion, one of the first rotation stopping portion and the second rotation stopping portion is disposed on the valve seat core 10, and the other is disposed on the main body portion 21. When the screw rod 50 of the electronic expansion valve drives the valve needle 20 to move back and forth between the opening position and the closing position, the first rotation stopping part and the second rotation stopping part can be matched with each other, so that the situation that the main body part 21 of the valve needle 20 and the valve seat core 10 rotate relatively is avoided, friction and impact between the main body part 21 and the valve seat core 10 caused by relative rotation are reduced, noise is reduced, the comfort level is increased, and the problem of high noise of the electronic expansion valve is solved.
In the first embodiment, the electronic expansion valve further includes a coil and a rotor 40. The coil drives the rotor 40 to rotate, the screw rod 50 is connected with the rotor 40, and the rotor 40 drives the screw rod 50 to rotate. The nut assembly 60 cooperates with the lead screw 50 to translate rotational movement of the lead screw 50 into linear movement. The end of the screw 50 remote from the rotor 40 is connected to the valve needle 20 for movement of the valve needle 20 between the closed and open positions. As shown in fig. 2 to 6, in the first embodiment, the first rotation stop portion is a rotation stop pin 33a, a mounting portion for mounting the rotation stop pin 33a is provided on the side wall of the valve seat core 10 or on the needle 20, and the second rotation stop portion is a second recess 31 fitted with the rotation stop pin 33 a. On one hand, when the main body part 21 of the valve needle 20 of the electronic expansion valve and the valve seat core 10 tend to rotate relatively, the rotation stopping pin 33a will cooperate with the second groove 31, so as to avoid the relative rotation between the main body part 21 and the valve seat core 10, further reduce the friction and impact between the main body part 21 and the valve seat core 10 due to the relative rotation, reduce the noise, and increase the comfort. On the other hand, the structure is simple and easy to process and assemble.
As shown in fig. 2 to 6, in the first embodiment, the mounting portion is a mounting hole 32, the axis of the anti-rotation pin 33a is perpendicular to the axis of the valve needle 20, and when the main body portion 21 of the valve needle 20 of the electronic expansion valve and the valve seat core 10 tend to rotate relatively, the end of the anti-rotation pin 33a is engaged with the sidewall of the second groove 31, so that the main body portion 21 and the valve seat core 10 are prevented from rotating relatively, friction and impact between the main body portion 21 and the valve seat core 10 due to relative rotation are reduced, noise is reduced, and comfort is increased. On the other hand, the structure is simple and easy to process and assemble. Preferably, the rotation preventing pin 33a is fixed in the mounting hole 32 by welding or an adhesive.
As shown in fig. 2 to 6, in the first embodiment, the height of the rotation preventing pin 33a protruding from the valve seat core 10 or the valve needle 20 is smaller than the depth of the second groove 31. The above structure reduces the probability of mutual contact between the end surface of the rotation stopping pin 33a and the bottom surface of the second groove 31, thereby reducing noise generated by mutual friction between the end surface of the rotation stopping pin 33a and the bottom surface of the second groove 31 and improving the use feeling of a user.
As shown in fig. 7 to 12, the electronic expansion valve of the second embodiment is different from the above-described embodiments in the shapes of the rotation stopping pin and the mounting portion fitted thereto. Specifically, in the second embodiment, the mounting portion is a third groove 34, the axis of the rotation stop pin 33b is parallel to the axis of the valve needle 20, and a part of the rotation stop pin 33b is disposed in the second groove 31 and another part is disposed in the third groove 34. When the main body part 21 of the valve needle 20 of the electronic expansion valve and the valve seat core 10 tend to rotate relatively, the side wall of the rotation stopping pin 33b is matched with the side wall of the second groove 31, so that the main body part 21 and the valve seat core 10 are prevented from rotating relatively, friction and impact between the main body part 21 and the valve seat core 10 due to relative rotation are reduced, noise is reduced, and comfort is improved. On the other hand, the structure is simple and easy to process and assemble. Preferably, the rotation preventing pin 33b is fixed in the third groove 34 by welding or an adhesive.
As shown in fig. 7 to 12, in the second embodiment, the diameter of the rotation preventing pin 33b is smaller than the sum of the groove depths of the second groove 31 and the third groove 34. The above structure reduces the probability of mutual contact between the side wall of the rotation stopping pin 33b and the bottom surface of the second groove 31, thereby reducing the noise generated by the mutual friction between the side wall of the rotation stopping pin 33b and the bottom surface of the second groove 31 and improving the use feeling of the user.
The difference between the electronic expansion valve (not shown) of the third embodiment and the first embodiment is the specific structure of the noise reduction unit. Specifically, the first rotation stopping portion is a first protrusion, and the second rotation stopping portion is a first groove matched with the first protrusion. The first projection is provided on the main body portion 21, and the first recess is provided on the valve seat core 10. When the main body part 21 of the valve needle 20 of the electronic expansion valve and the valve seat core 10 tend to rotate relatively, the side wall of the first protrusion on the main body part 21 is matched with the side wall of the first groove on the valve seat core 10, and the side wall of the first groove plays a role of stopping the side wall of the first protrusion, so that the relative rotation of the main body part 21 and the valve seat core 10 is avoided, friction and impact between the main body part 21 and the valve seat core 10 due to relative rotation are reduced, noise is reduced, and comfort is increased. Of course, the first protrusion may also be disposed on the valve seat core 10, the first groove is disposed on the main body portion 21, and the manner of matching the first protrusion and the first groove is the same as the above-mentioned matching manner, and will not be described again. In addition, the projections and the grooves are simple in structure and easy to process.
In the third embodiment, the height of the first protrusion is smaller than the depth of the first groove. The structure reduces the probability of mutual contact between the top surface of the first protrusion and the bottom surface of the first groove, thereby reducing the noise generated by mutual friction between the top surface of the first protrusion and the first groove and improving the use feeling of a user.
As shown in fig. 13 to 15, the electronic expansion valve according to the fourth embodiment is different from the electronic expansion valve according to the third embodiment in the specific structure of the valve seat core 10. Specifically, in the fourth embodiment, the valve seat core 10 includes the valve seat body 12 and the snap ring 13 that is located above the valve seat body 12 and is independent of the valve seat body 12, the first rotation stopping portion is disposed on an inner wall of the snap ring 13, the first rotation stopping portion is the second protrusion 35, and the second rotation stopping portion is the fourth groove 36 that is matched with the second protrusion 35. The structure has two advantages: on one hand, when the main body portion 21 of the valve needle 20 of the electronic expansion valve and the valve seat core 10 tend to rotate relatively, the sidewall of the second protrusion 35 and the sidewall of the fourth groove 36 are engaged with each other, so that the occurrence of relative rotation between the main body portion 21 and the valve seat core 10 is avoided, friction and impact between the main body portion 21 and the valve seat core 10 due to relative rotation are reduced, noise is reduced, and comfort is increased. On the other hand, the structure is simple and easy to process and assemble.
As shown in fig. 13 to 15, in the fourth embodiment, the height of the second protrusion 35 is smaller than the groove depth of the fourth groove 36. The above structure reduces the probability of mutual contact between the top surface of the second protrusion 35 and the bottom surface of the fourth groove 36, thereby reducing noise generated by mutual friction between the top surface of the second protrusion 35 and the bottom surface of the fourth groove 36 and improving the user experience.
As shown in fig. 16 to 19, the electronic expansion valve according to the fifth embodiment is different from the electronic expansion valve according to the third embodiment in the position of the first rotation stopper. Specifically, in the fifth embodiment, the first rotation stopping portion is a first protrusion, and the second rotation stopping portion is a first groove engaged with the first protrusion. The first protrusion is provided on the nut member 60, the first groove is provided on the main body portion 21, and the valve seat core 10 has a notch avoiding the first protrusion. The first bulge passes through the notch and is matched with the first groove. When the main body part 21 of the valve needle 20 of the electronic expansion valve and the valve seat core 10 tend to rotate relatively, the side wall of the first protrusion on the nut component 60 will cooperate with the side wall of the first groove on the main body part 21, and the side wall of the first groove acts as a stop for the side wall of the first protrusion, so that the main body part 21 and the nut component 60 are prevented from rotating relatively. Because the nut assembly 60 is stationary relative to the valve seat core 10, the above structure prevents the main body 21 and the valve seat core 10 from rotating relative to each other, so that friction and impact between the main body 21 and the valve seat core 10 due to relative rotation are reduced, noise is reduced, and comfort is increased. Of course, the first protrusion may also be disposed on the main body portion 21, the first groove is disposed on the nut component 60, and the manner of matching the first protrusion and the first groove is the same as the above-mentioned matching manner, and will not be described again here.
Preferably, in the fifth embodiment, a gap is formed between the first protrusion and the first groove, that is, the height of the first protrusion is smaller than the sum of the radial depth of the notch avoiding the first protrusion and the depth of the first groove. The structure reduces the probability of mutual contact between the top surface of the first protrusion and the bottom surface of the first groove, thereby reducing the noise generated by mutual friction between the top surface of the first protrusion and the first groove and improving the use feeling of a user.
In the above embodiments, the fitting relationship between the nut assembly 60 and the valve seat core 10 is such that the upper end of the valve seat core 10 is fitted into the lower end of the nut assembly 60, that is, the nut assembly is fitted around the outside of the valve seat core. In addition to this fitting manner, the outer diameter of the lower end portion of the nut member 60 may be set to match the inner diameter of the upper end portion of the valve seat core 10, that is, the lower end portion of the nut member 60 is fitted inside the upper end portion of the valve seat core 10, so that the first rotation preventing portion may be also provided on the nut member 60 to match the first groove provided on the main body portion 21 when the first rotation preventing portion is the first protrusion, to achieve the intended technical effect of the present invention.
In the present application, there is also provided a refrigeration device, a refrigeration device (not shown in the figures) according to the present application comprising: the electronic expansion valve is the electronic expansion valve. The refrigeration equipment with the electronic expansion valve also has the advantages because the electronic expansion valve has the advantage of low noise.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. An electronic expansion valve, comprising:
a valve seat;
a nut assembly (60) attached to the valve seat;
a lead screw (50) movably disposed within the nut assembly (60);
a valve seat core (10) located in the valve seat and having a valve port (11);
a valve needle (20), wherein the valve needle (20) comprises a main body part (21) matched with the inner wall of the valve seat core (10) and a needle head part (22) positioned below the main body part (21) and matched with the valve port (11), the valve needle (20) is provided with a closing position for closing the valve port (11) and an opening position for avoiding the valve port (11), and the screw rod (50) drives the valve needle (20) to move between the closing position and the opening position;
and the noise reduction part comprises a first rotation stopping part and a second rotation stopping part which are matched with each other, one of the first rotation stopping part and the second rotation stopping part is arranged on the valve seat core (10) or the nut component (60), and the other one is arranged on the main body part (21).
2. The electronic expansion valve of claim 1, wherein the first rotation stop portion is a first protrusion, and the second rotation stop portion is a first groove engaged with the first protrusion.
3. An electronic expansion valve according to claim 2, wherein the first protrusion is provided on the nut assembly (60), the valve seat core (10) has an indentation avoiding the first protrusion, and the first recess is provided on the main body portion (21).
4. An electronic expansion valve according to claim 2 or 3, wherein there is a gap between the first protrusion and the first recess.
5. An electronic expansion valve according to claim 1, wherein the first rotation stop portion is a rotation stop pin, a mounting portion for mounting the rotation stop pin is provided on a side wall of the valve seat core (10) or on the valve needle (20), and the second rotation stop portion is a second groove (31) engaged with the rotation stop pin.
6. An electronic expansion valve according to claim 5, wherein the mounting portion is a mounting hole (32), the axis of the anti-rotation pin is perpendicular to the axis of the valve needle (20), and the end of the anti-rotation pin is fitted in the second groove (31).
7. An electronic expansion valve according to claim 6, wherein the height of the anti-rotation pin protruding from the valve seat core (10) or the valve needle (20) is smaller than the depth of the second groove (31).
8. An electronic expansion valve according to claim 5, wherein the mounting portion is a third groove (34), and wherein the axis of the anti-rotation pin is parallel to the axis of the valve needle (20), and wherein a part of the anti-rotation pin is arranged in the second groove (31) and another part of the anti-rotation pin is arranged in the third groove (34).
9. An electronic expansion valve according to claim 8, wherein the diameter of the anti-rotation pin is smaller than the sum of the groove depths of the second groove (31) and the third groove (34).
10. The electronic expansion valve according to claim 1, wherein the valve seat core (10) comprises a valve seat body (12) and a snap ring (13) which is located above the valve seat body (12) and is independent of the valve seat body (12), the first rotation-stopping portion is disposed on an inner wall of the snap ring (13), the first rotation-stopping portion is a second protrusion (35), and the second rotation-stopping portion is a fourth groove (36) which is matched with the second protrusion (35).
11. An electronic expansion valve according to claim 10, wherein the height of the second protrusion (35) is smaller than the groove depth of the fourth groove (36).
12. A refrigeration device comprising an electronic expansion valve, wherein the electronic expansion valve is an electronic expansion valve according to any of claims 1 to 11.
CN201610354894.3A 2016-05-25 2016-05-25 Electronic expansion valve and refrigeration equipment with same Active CN107435753B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201610354894.3A CN107435753B (en) 2016-05-25 2016-05-25 Electronic expansion valve and refrigeration equipment with same
KR1020187037229A KR20190010632A (en) 2016-05-25 2017-05-25 Electronic expansion valve and cooling device having the same
PCT/CN2017/085927 WO2017202366A1 (en) 2016-05-25 2017-05-25 Electronic expansion valve and cooling device having same
JP2018561243A JP6797214B2 (en) 2016-05-25 2017-05-25 An electronic expansion valve and a freezing device having this electronic expansion valve

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