CN116816950A - Electronic expansion valve and refrigeration equipment - Google Patents

Electronic expansion valve and refrigeration equipment Download PDF

Info

Publication number
CN116816950A
CN116816950A CN202310913730.XA CN202310913730A CN116816950A CN 116816950 A CN116816950 A CN 116816950A CN 202310913730 A CN202310913730 A CN 202310913730A CN 116816950 A CN116816950 A CN 116816950A
Authority
CN
China
Prior art keywords
valve
section
difference
thread section
electronic expansion
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.)
Pending
Application number
CN202310913730.XA
Other languages
Chinese (zh)
Inventor
陈超
杨茂
黄龙华
刘振超
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.)
Guangdong Welling Motor Manufacturing Co Ltd
Original Assignee
Guangdong Welling Motor Manufacturing 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 Guangdong Welling Motor Manufacturing Co Ltd filed Critical Guangdong Welling Motor Manufacturing Co Ltd
Priority to CN202310913730.XA priority Critical patent/CN116816950A/en
Publication of CN116816950A publication Critical patent/CN116816950A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F16K1/38—Valve members of conical shape
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • 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
    • 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

Abstract

The application discloses an electronic expansion valve and a refrigeration device, wherein the electronic expansion valve comprises: the valve housing comprises a valve seat and a housing, the housing and the valve seat are mutually matched to form a hollow cavity, the valve seat is provided with a valve port, and the valve port is communicated with the valve cavity; the nut is arranged in the valve shell, and an internal thread section and a first through hole section are formed in the nut; the valve rod is arranged through the nut, one end of the valve rod is provided with a valve needle for adjusting the opening degree of the valve port, and the valve rod is provided with an external thread section which is at least partially in threaded connection with the internal thread section and a first cylindrical section which is at least partially inserted into the first through hole section; wherein the fit clearance between the first cylindrical section and the first through hole section is smaller than the minimum fit clearance between the external thread section and the internal thread section. The application can keep the preset assembly space of the external thread section and the internal thread section and prevent the external thread section and the internal thread section from being blocked.

Description

Electronic expansion valve and refrigeration equipment
The application is a divisional application with the application number of 202110759224.0, and the application date of the main application is as follows: 2021, 07, 05; the application is named as follows: an electronic expansion valve and a refrigeration device.
Technical Field
The application relates to the field of household appliances, in particular to an electronic expansion valve and refrigeration equipment.
Background
The electronic expansion valve is widely applied to refrigeration equipment such as refrigerators, air conditioners and the like. The electronic expansion valve is provided with a nut and a screw, wherein the position of the nut is relatively fixed, a valve rod is arranged on the nut in a threaded mode, and axial movement of the valve rod is achieved by rotating the valve rod. In order to realize the aperture control to the valve port, in the existing electronic expansion valve, a valve needle is arranged at the valve port, the valve needle is connected with a valve rod through structures such as an elastic piece, and the like, and the valve needle is pushed to move through the valve rod, so that the position of the valve needle is regulated, and the aperture of the valve port is regulated by changing the positions of the valve needle and the valve port. Because the valve rod needs to be in a movable state, in the existing electronic expansion valve, the valve rod is easy to be blocked with the nut, and the position adjustment of the valve needle is affected.
Disclosure of Invention
The application mainly aims to provide an electronic expansion valve and refrigeration equipment, and aims to solve the problem that the existing electronic expansion valve is easy to be blocked in the use process.
In order to achieve the above object, the present application provides an electronic expansion valve, comprising:
the valve housing comprises a valve seat and a housing, the housing and the valve seat are mutually matched to form a hollow cavity, the valve seat is provided with a valve port, and the valve port is communicated with the valve cavity;
the nut is arranged in the valve shell and is provided with a through hole, a threaded surface is arranged on the through hole, an internal threaded section is formed, and the through hole is a unthreaded hole, so that a first through hole section is formed; and
the valve rod is arranged through the nut, one end of the valve rod is provided with a valve needle for adjusting the opening degree of the valve port, at least part of the valve rod is a threaded surface to form an external threaded section in threaded connection with the internal threaded section, at least part of the valve rod is a smooth surface to form a first cylindrical section inserted into the first through hole section; the valve rod and the valve needle are integrally arranged;
wherein the fit clearance between the first cylindrical section and the first through hole section is smaller than the minimum fit clearance between the external thread section and the internal thread section.
Optionally, the difference between the inner diameter of the first through hole section and the outer diameter of the first cylindrical section is a first difference; the difference value of the root diameter of the internal thread section and the crest diameter of the external thread section is a second difference value, and the difference value of the root diameter of the external thread section and the crest diameter of the internal thread section is a third difference value;
the first difference is smaller than the second difference, and the first difference is smaller than the third difference.
Optionally, the valve stem further has a second cylindrical section, the external threaded section being located between the first cylindrical section and the second cylindrical section; the nut is also provided with a second through hole section, and the second cylindrical section is at least partially inserted into the second through hole section;
the fit clearance between the second cylindrical section and the second through hole section is smaller than the minimum fit clearance between the external thread section and the internal thread section.
Optionally, the difference between the inner diameter of the second through hole section and the outer diameter of the second cylindrical section is a fourth difference; the difference value of the root diameter of the internal thread section and the crest diameter of the external thread section is a second difference value, and the difference value of the root diameter of the external thread section and the crest diameter of the internal thread section is a third difference value;
the fourth difference is smaller than the second difference and smaller than the third difference.
Optionally, the fit clearance between the second cylindrical section and the second through hole section is greater than the fit clearance between the first cylindrical section and the first through hole section.
Optionally, the inner diameters of the first through hole section, the internal thread section and the second through hole section decrease in sequence.
Optionally, the valve stem is integrally provided with the valve needle.
Optionally, the electronic expansion valve further comprises:
the driving assembly is arranged on the valve shell, the valve rod is integrally provided with a top end far away from the valve needle, and the top end of the valve rod is connected with the driving assembly so that the driving assembly drives the valve rod to axially move.
Optionally, the drive assembly comprises:
the rotor module is rotatably arranged on the valve shell; and
and the limiting plate is arranged on the rotor module, and the top end of the valve rod is connected with the limiting plate.
Optionally, the drive assembly further comprises:
the limiting rod is arranged on the limiting plate; and
the slip ring is connected with the limit rod;
the outer wall of the nut is provided with a guide rail, and the slip ring is in sliding fit with the slide rail.
The application also proposes a refrigeration device comprising an electronic expansion valve according to any of the above.
According to the technical scheme, the first cylindrical section is matched with the first through hole section, so that the valve rod is limited; through making the fit clearance of first cylinder section and first through-hole section be less than the fit clearance of external screw thread section and internal screw thread section, can play spacing effect to the valve rod for external screw thread section and internal screw thread section can keep preset assembly space, prevent that the card from appearing in external screw thread section and internal screw thread section and die.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an electronic expansion valve according to an embodiment of the present application;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic view of an embodiment of a nut of the present application;
FIG. 4 is a schematic illustration of the structure of an embodiment of a valve stem of the present application;
FIG. 5 is a schematic view of an embodiment of a valve seat according to the present application;
FIG. 6 is a schematic view showing the fitting of the valve seat and the nut according to an embodiment of the present application;
FIG. 7 is a schematic view of an embodiment of the nut and stem engaged condition of the present application;
FIG. 8 is a schematic diagram of an embodiment of a valve stem and drive assembly according to the present application.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present application, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.
The application provides an electronic expansion valve which can be used for refrigerating or heating equipment such as a refrigerator, an air conditioner, a heat pump water heater and the like and is used for controlling the flow of a refrigerating medium in a refrigerating system. For convenience of description, a refrigerating apparatus will be described below as an example of a refrigerator. Fig. 1 to 8 are drawings corresponding to embodiments of the present application.
Referring to fig. 1 and 2, in one embodiment, an electronic expansion valve includes:
a valve housing 10, the valve housing 10 being provided with a valve chamber and a valve port 15 communicating with the valve chamber; the valve housing 10 is formed inside with a valve chamber for accommodating a fluid. The valve housing 10 may include a valve seat 11 and a housing 12, the housing 12 and the valve seat 11 cooperating to form a hollow chamber, the valve port 15 communicating with the valve cavity for flow of refrigerant into or out of the valve cavity.
A nut 20 mounted in the valve housing 10, the nut 20 having an internal thread section 22 and a first through hole section 21 formed therein; the nut 20 and the valve housing 10 are connected and fixed to each other, and the nut 20 is provided with a through hole, a threaded surface is provided in a portion of the through hole, an internal thread section 22 is formed, and a first through hole section 21 is formed in a portion of the through hole. The valve chamber may be defined by the side of the nut 20 facing the valve port 15 and the inner wall of the valve housing 10.
A valve rod 30 disposed through the nut 20, one end of the valve rod 30 being provided with a valve needle 31 for adjusting the opening degree of the valve port 15, the valve rod 30 having an external thread section 34 at least partially screwed with the internal thread section 22, and a first cylindrical section 33 at least partially inserted into the first through hole section 21; the valve rod 30 is partly a threaded surface, forms an external thread section 34, is partly a smooth surface, forms a first cylindrical section 33, the external thread section 34 can be in threaded connection with the internal thread section 22 of the nut 20, and the first cylindrical section 33 can be inserted into the first through hole section 21, so that the nut 20 can play a limiting role on the valve rod 30.
Referring to fig. 3 and 4, the fit clearance between the first cylindrical section 33 and the first through hole section 21 is smaller than the minimum fit clearance between the male thread section 34 and the female thread section 22.
The first cylindrical section 33 is mutually matched with the first through hole section 21, the first through hole section 21 can mutually limit the first cylindrical section 33, and when the external thread section 34 is mutually matched with the internal thread section 22, a gap exists between threads of the external thread section 34 and the internal thread section 22, so that the valve rod 30 can axially move from the inside of the nut 20. When the difference between the inner diameter D3 of the first through hole section 21 and the outer diameter D3 of the first cylindrical section 33 is a first difference, the first difference corresponds to the fit clearance between the first through hole section 21 and the first cylindrical section 33, and the fit clearance between the first through hole section 21 and the first cylindrical section 33 is smaller than the fit clearance between the external thread section 34 and the internal thread section 22, the first through hole section 21 and the first cylindrical section 33 are higher, so that the external thread section 34 and the internal thread section 22 can be in threaded fit according to a preset mode, and the seizure caused by deflection of the external thread section 34 and the internal thread section 22 is avoided. Because the relative positions of the valve rod 30 and the nut 20 are limited by the first cylindrical section 33 and the first through hole section 21, the fit clearance between the external thread section 34 and the internal thread section 22 can be increased according to the requirement, so that the friction resistance is not too large due to too small fit clearance, and further the screw thread is prevented from being blocked.
The valve rod 30 is inserted through the through hole of the nut 20, wherein one end of the valve rod 30 can protrude from the nut 20 to form a valve needle 31, and when the valve rod 30 moves along the axial direction, the valve needle 31 moves synchronously, so that the valve needle 31 can be inserted into the valve port 15. When the valve needle 31 is inserted into the valve port 15 to close the valve port 15, the refrigerant cannot enter or flow out of the valve cavity of the electronic expansion valve, at this time, the opening degree of the valve port 15 is minimum, and when the valve needle 31 is completely removed from the valve port 15, the opening degree of the valve port 15 is maximum. Adjusting the opening of the valve port 15 is achieved by adjusting the depth to which the valve needle 31 is partially inserted into the valve port 15.
In one embodiment, the valve needle 31 is integrally provided with the valve stem 30 such that the valve needle 31 can move synchronously when the valve stem 30 moves in the axial direction. By moving the valve needle 31 in synchronization with the stem 30, the position of the valve needle 31 can be precisely adjusted by controlling the stroke of the stem 30, thereby realizing precise adjustment of the opening of the valve port 15. Because the first cylindrical section 33 of the valve rod 30 and the first through hole section 21 of the nut 20 can be mutually limited, and the external thread section 34 of the valve rod 30 and the internal thread section 22 of the nut 20 can be mutually limited, when the valve rod 30 is controlled, the valve needle 31 can synchronously displace, and the moving track of the valve needle 31 does not need to be limited on one side of the valve needle 31, so that the design of the nut 20 and the valve needle 31 can be simplified. Because the fit clearance between the first cylindrical section 33 and the first through hole section 21 is smaller than the fit clearance between the external thread section 34 and the internal thread section 22, the moving track of the valve rod 30 is not easy to deviate in the moving process of the valve rod 30, and meanwhile, the moving track of the valve needle 31 can be accurately controlled due to the fact that the valve needle 31 and the valve rod 30 are integrally arranged, and when the opening of the valve port 15 is regulated through the valve needle 31, accurate regulation can be realized.
When the valve needle 31 adjusts the opening of the valve port 15, the valve needle 31 is partially blocked in the valve port 15, and when the refrigerant enters the valve cavity in the operation process of the electronic expansion valve, the valve needle 31 is impacted, so that the valve needle 31 is easy to vibrate. Since the fit clearance between the first cylindrical section 33 and the first through hole section 21 is smaller than the fit clearance between the male screw section 34 and the female screw section 22, the fit clearance between the valve rod 30 and the nut 20 is reduced, which can help to improve the stability of the valve rod 30, to avoid vibration generated when the valve needle 31 is impacted by the refrigerant, and to reduce vibration noise generated by the valve rod 30.
In this embodiment, the first cylindrical section 33 is a portion of the valve stem 30 having a cylindrical surface of a polish rod, and the externally threaded section 34 is a portion of the valve stem 30 having a threaded surface. In making the valve stem 30, the valve needle 31 may be formed at one end of the valve stem 30, with the male threaded section 34 disposed between the first cylindrical section 33 and the valve needle 31. The distribution of the first through hole sections 21 and the internal thread sections 22 on the nut 20 is matched with the valve rod 30.
Referring to fig. 5, the electronic expansion valve may further include other functional components, where the valve housing 10 may be provided with a first pipe body 13 and a second pipe body 14, the first pipe body 13 is communicated with the valve cavity through a valve port 15, and the first pipe body 13 may be coaxially disposed with the valve seat 11. The second tube 14 communicates with the valve chamber from the side wall of the valve housing 10. One of the first pipe body 13 and the second pipe body 14 serves as an input pipe, and the other serves as an output pipe. The first tube 13 and the second tube 14 may each be connected to the valve seat 11. The housing 12 is connected to the end of the valve seat 11 remote from the first tubular body 13 to form a cavity for mounting the nut 20 and the valve stem 30.
Referring to fig. 6, for example, when the stem 30 is disposed coaxially with the needle 31, the nut 20 is fixed to the valve seat 11 so that the through hole in the nut 20 can be coaxial with the valve port 15 when the electronic expansion valve is installed. The nut 20 may be in interference fit with the inner wall surface of the valve seat 11, or the nut 20 and the valve seat 11 may be connected and fixed to each other by other connectors.
Referring to fig. 7, the valve rod 30 is disposed through the through hole of the nut 20 so that the valve needle 31 of the valve rod 30 can be inserted into the valve port 15, and by adjusting the position of the valve rod 30, the depth of the valve needle 31 inserted into the valve port 15 can be adjusted, thereby adjusting the opening of the valve port 15.
Referring to fig. 1, after the valve stem 30 is positioned, the housing 12 and the valve seat 11 are connected and fixed to each other to form a valve housing 10 structure.
In one embodiment, the difference between the inner diameter of the first through-hole section 21 and the outer diameter of the first cylindrical section 33 is a first difference; the crest of the external thread section 34 is matched with the root of the internal thread section 22, and the difference value between the root diameter of the internal thread section 22 and the crest diameter of the external thread section 34 is a second difference value; the crest of the internal thread segment 22 is matched with the root of the external thread segment 34, and the difference between the root diameter of the external thread segment 34 and the crest diameter of the internal thread segment 22 is a third difference; the first difference is smaller than the second difference, and the first difference is smaller than the third difference.
The first difference is smaller than the smaller one of the second difference and the third difference, so that the first cylindrical section 33 is matched with the first through hole section 21, and therefore, the matching gap between the crest of the external thread section 34 and the root of the internal thread section 22 can be properly increased while the valve rod 30 is matched with the nut 20, and the problem of friction locking caused by too small matching gap between the two can be avoided. At the same time, the fit clearance between the root of the external thread segment 34 and the crest of the internal thread segment 22 may be increased to reduce frictional damage between the root of the external thread segment 34 and the root of the internal thread segment 22 while galling may be avoided.
Because the first difference is smaller than the second difference and the third difference, the thread fit between the external thread section 34 and the internal thread section 22 can maintain a preset state no matter the crest of the external thread section 34 is matched with the root of the internal thread section 22 or the root of the external thread section 34 is matched with the crest of the internal thread section 22, so that the crest and the root are prevented from being deviated, the crest and the root are kept in a stable fit clearance, and the problem of seizure is further prevented.
With continued reference to fig. 3 and 4, in one embodiment, the valve stem 30 also has a second cylindrical section 35; the nut 20 further has a second through-hole section 23, and the second cylindrical section 35 is at least partially inserted into the second through-hole section 23; the second cylindrical section 35 is mutually adapted to the second through hole section 23 so that the second through hole section 23 can limit the second cylindrical section 35. The external thread section 34 is located between the first cylindrical section 33 and the second cylindrical section 35, and the valve needle 31 may be located on a side of the second cylindrical section 35 remote from the external thread section 34. The fit clearance between the second cylindrical section 35 and the second through hole section 23 is smaller than the minimum fit clearance between the male screw section 34 and the female screw section 22, so that the valve stem 30 can be inserted into the through hole of the nut 20 in a preset direction.
The valve rod 30 has a first end and a second end which are oppositely arranged, and the first cylindrical section 33, the external thread section 34, the second cylindrical section 35 and the valve needle 31 are sequentially arranged from the first end to the second end, and the outer diameters of the first cylindrical section 33, the external thread section 34, the second cylindrical section 35 and the valve needle 31 are sequentially decreased, namely, D3 > D2 > D1. The through hole of the nut 20 is sequentially provided with a first through hole section 21, an internal thread section 22 and a second through hole section 23, and the internal diameters of the first through hole section 21, the internal thread section 22 and the second through hole section 23 are sequentially decreased, that is, d3 > d2 > d1, so as to limit the maximum movement range of the valve rod 30, and further limit the maximum depth of the valve needle 31 inserted into the valve port 15.
The fit clearance between the second through hole section 23 and the second cylindrical section 35 is smaller than the fit clearance between the internal thread section 22 and the external thread section 34, so that the second cylindrical section 35 and the second through hole section 23 restrict the relative displacement of the valve rod 30, and the valve rod 30 is not easy to deflect when moving along the axial direction thereof. When the fit clearance between the second through hole section 23 and the second cylindrical section 35 is smaller than the fit clearance between the external thread section 34 and the internal thread section 22, the coaxiality between the second through hole section 23 and the second cylindrical section 35 is higher, so that the external thread section 34 and the internal thread section 22 can be in threaded fit in a preset mode, and the clamping caused by deflection of the external thread section 34 and the internal thread section 22 is avoided. Since the relative positions of the valve rod 30 and the nut 20 are limited by the second cylindrical section 35 and the second through hole section 23, the fit clearance between the external thread section 34 and the internal thread section 22 can be increased as required, and further the two are not easy to be blocked due to overlarge friction resistance caused by overlarge fit clearance.
Because the external thread section 34 is disposed between the first cylindrical section 33 and the second cylindrical section 35, the first cylindrical section 33, the first through hole section 21, the second cylindrical section 35 and the second through hole section 23 limit the valve rod 30 at two ends of the external thread section 34, so that the external thread section 34 of the valve rod 30 and the internal thread section 22 of the nut 20 have larger fit clearance, and further, the screw thread is prevented from being blocked.
The first cylindrical section 33, the first through hole section 21, the second cylindrical section 35 and the second through hole section 23 limit the valve rod 30 from two ends of the valve rod 30 respectively, so that the matching state between the external thread section 34 and the internal thread section 22 is relatively constant, deflection is not easy to occur, the valve needle 31 and the valve rod 30 are integrally arranged, the moving track of the valve needle 31 is relatively constant, and when the moving track is matched with the valve port 15, the opening degree adjusting precision control of the valve port 15 is more stable.
Optionally, the difference between the inner diameter of the second through hole section 23 and the outer diameter of the second cylindrical section 35 is a fourth difference; the difference between the root diameter of the internal thread section 22 and the crest diameter of the external thread section 34 is a second difference, and the difference between the root diameter of the external thread section 34 and the crest diameter of the internal thread section 22 is a third difference; the fourth difference is smaller than the smaller of the second difference and the third difference, so that the second cylindrical section 35 is matched with the second through hole section 23, and the matching gap between the crest of the external thread section 34 and the root of the internal thread section 22 can be increased while the valve rod 30 and the nut 20 are mutually matched, so that the problem of friction blocking caused by too small matching gap between the two can be avoided. At the same time, the fit clearance between the root of the external thread segment 34 and the crest of the internal thread segment 22 may be increased to reduce frictional damage between the root of the external thread segment 34 and the root of the internal thread segment 22 while galling may be avoided. Because the fourth difference is smaller than the second difference and the third difference, the thread fit between the external thread segment 34 and the internal thread segment 22 can maintain a predetermined state, whether the crest of the thread of the external thread segment 34 is fit with the crest of the thread of the internal thread segment 22 or the crest of the thread of the external thread segment 34 is fit with the crest of the thread of the internal thread segment 22, preventing the corresponding crests and roots from being deviated, maintaining a stable fit gap between the corresponding crests and roots, and further preventing the occurrence of seizing.
Because the first difference is smaller than the smaller of the second difference and the third difference, the first cylindrical section 33 and the first through hole section 21 cooperate to play a role in limiting the external thread section 34 at the end of the external thread section 34, which is close to the first cylindrical section 33. The fourth difference is smaller than the smaller one of the second difference and the third difference, so that the second cylindrical section 35 and the second through hole section 23 can be matched, the effect of limiting the external thread section 34 can be achieved at one end, close to the second cylindrical section 35, of the external thread section 34, the state of the external thread section 34 is further limited from two ends of the external thread section 34, the threads of the external thread section 34 and the threads of the internal thread section 22 of the nut 20 keep a preset matching gap, the matching of the crests and the bottoms of the teeth is prevented from being deviated, and further the threads can be prevented from being blocked.
Optionally, the fit clearance between the second cylindrical section 35 and the second through hole section 23 is larger than the fit clearance between the first cylindrical section 33 and the first through hole section 21 to reduce friction when the valve stem 30 is inserted into the nut 20, and to promote ease of installation of the valve stem 30. Since the fourth difference is smaller than the smaller one of the second difference and the third difference, when the fit clearance between the second cylindrical section 35 and the second through hole section 23 is larger than the fit clearance between the first cylindrical section 33 and the first through hole section 21, the moving resistance of the valve stem 30 when moving relative to the nut 20 is smaller, and a stable coaxial state can be maintained.
Referring to fig. 1 and 6, in an embodiment, the electronic expansion valve further includes a driving assembly disposed on the valve housing 10, the valve stem 30 is integrally disposed with a tip end 32 remote from the valve needle 31, and the tip end 32 of the valve stem 30 is connected to the driving assembly so that the driving assembly drives the valve stem 30 to move axially. The side of the nut 20 facing away from the valve port 15 may define a cavity for mounting a drive assembly for driving the valve stem 30 to rotate relative to one another, such that the valve stem 30 is axially movable along the nut 20 when the valve stem 30 is threaded onto the nut 20. The driving assembly is used for adjusting the position of the valve rod 30, so as to adjust the depth of the valve needle 31 inserted into the valve port 15, and further adjust the opening of the valve port 15.
In one embodiment, an alternative implementation of a drive assembly is disclosed, the drive assembly comprising:
a rotor module 40 rotatably provided to the valve housing 10; the rotor module 40 is rotatably provided to the valve housing 10, and the rotor module 40 may be rotatably provided to the housing 12. The rotor module 40 is capable of relative rotation after being driven in a manner known in the art.
The limiting plate 41 is provided on the rotor module 40, and the tip 32 of the valve rod 30 is connected to the limiting plate 41. When the rotor module 40 rotates, the rotor module 40 drives the limiting plate 41 to synchronously rotate, and the limiting rod 43 drives the top end 32 of the valve rod 30 to rotate. The top end 32 of the valve rod 30 is integrally arranged with the valve rod 30, and when the top end 32 of the valve rod 30 rotates, the valve rod 30 is driven to integrally rotate, so that the position of the valve rod 30 is adjusted.
Further optionally, the driving assembly further includes:
a limit lever 43 provided on the limit plate 41; one end of the limiting rod 43 is connected with the limiting plate 41, and the other end extends away from the limiting plate 41.
A slip ring 44 connected to the stopper rod 43; the slip ring 44 is connected to the stopper rod 43 to move in synchronization with the stopper rod 43. The outer wall of the nut 20 is provided with a guide rail, and the slip ring 44 is in sliding fit with the slide rail 24. When the rotating module rotates relatively, the limiting plate 41 drives the limiting rod 43 to rotate synchronously, and the sliding ring 44 slides along the sliding rail 24 formed on the outer wall of the nut 20, so as to limit the rotating track of the valve rod 30 and improve the stability of the valve rod 30 in the rotating process.
The application also provides an embodiment of the refrigeration equipment.
The refrigeration device includes an electronic expansion valve as in any of the embodiments described above. The electronic expansion valve is used for controlling the flow of the refrigerant of the refrigeration equipment. When the electronic expansion valve operates, the first cylindrical section 33 is matched with the first through hole section 21, so that the assembly precision of the valve rod 30 and the nut 20 can be improved, the valve rod 30 is prevented from deflecting, the control precision of the valve needle 31 can be improved, the flow of the refrigerant can be adjusted according to the preset precision by the valve needle 31, and the control precision of the refrigeration equipment is improved. After the valve rod 30 is mutually matched with the nut 20, the fit clearance between the external thread section of the valve rod 30 and the internal thread section of the nut 20 can be relatively increased, so that the valve rod 30 is prevented from being blocked while the relative movement of the valve rod 30 is limited.
The foregoing description of the embodiments of the present application is merely an optional embodiment of the present application, and is not intended to limit the scope of the application, and all equivalent structural modifications made by the present application in the light of the present application, the description of which and the accompanying drawings, or direct/indirect application in other related technical fields are included in the scope of the application.

Claims (12)

1. An electronic expansion valve, comprising:
the valve housing comprises a valve seat and a housing, the housing and the valve seat are mutually matched to form a hollow cavity, the valve seat is provided with a valve port, and the valve port is communicated with the valve cavity;
the nut is arranged in the valve shell and is provided with a through hole, a threaded surface is arranged on the through hole, an internal threaded section is formed, and the through hole is a unthreaded hole, so that a first through hole section is formed; and
the valve rod is arranged through the nut, one end of the valve rod is provided with a valve needle for adjusting the opening degree of the valve port, at least part of the valve rod is a threaded surface to form an external threaded section in threaded connection with the internal threaded section, at least part of the valve rod is a smooth surface to form a first cylindrical section inserted into the first through hole section; the valve rod and the valve needle are integrally arranged;
wherein the fit clearance between the first cylindrical section and the first through hole section is smaller than the minimum fit clearance between the external thread section and the internal thread section.
2. The electronic expansion valve of claim 1, wherein the difference between the inner diameter of the first bore section and the outer diameter of the first cylindrical section is a first difference; the difference value of the root diameter of the internal thread section and the crest diameter of the external thread section is a second difference value, and the difference value of the root diameter of the external thread section and the crest diameter of the internal thread section is a third difference value;
the first difference is smaller than the second difference, and the first difference is smaller than the third difference.
3. The electronic expansion valve of claim 1, wherein the valve stem further has a second cylindrical section, the externally threaded section being located between the first cylindrical section and the second cylindrical section; the nut is also provided with a second through hole section, and the second cylindrical section is at least partially inserted into the second through hole section;
the fit clearance between the second cylindrical section and the second through hole section is smaller than the minimum fit clearance between the external thread section and the internal thread section.
4. The electronic expansion valve of claim 3, wherein the difference between the inner diameter of the second through-hole section and the outer diameter of the second cylindrical section is a fourth difference; the difference value of the root diameter of the internal thread section and the crest diameter of the external thread section is a second difference value, and the difference value of the root diameter of the external thread section and the crest diameter of the internal thread section is a third difference value;
the fourth difference is smaller than the second difference and smaller than the third difference.
5. The electronic expansion valve of claim 3, wherein the mating gap between the second cylindrical section and the second through bore section is greater than the mating gap between the first cylindrical section and the first through bore section.
6. The electronic expansion valve of claim 3, wherein the first bore section, the internal thread section and the second bore section have successively decreasing inner diameters.
7. The electronic expansion valve of claim 1, wherein the nut is an interference fit with an inner wall surface of the valve seat.
8. The electronic expansion valve of claim 1, wherein the valve housing is provided with a first tube and a second tube, the second tube being in communication with the valve chamber from a side wall of the valve housing, the first tube being in communication with the valve chamber through the valve port, the first tube being coaxially disposed with the valve seat.
9. The electronic expansion valve of any of claims 1 to 8, further comprising:
the driving assembly is arranged on the valve shell, the valve rod is integrally provided with a top end far away from the valve needle, and the top end of the valve rod is connected with the driving assembly so that the driving assembly drives the valve rod to axially move.
10. The electronic expansion valve of claim 9, wherein the drive assembly comprises:
the rotor module is rotatably arranged on the valve shell; and
and the limiting plate is arranged on the rotor module, and the top end of the valve rod is connected with the limiting plate.
11. The electronic expansion valve of claim 10, wherein the drive assembly further comprises:
the limiting rod is arranged on the limiting plate; and
the slip ring is connected with the limit rod;
the outer wall of the nut is provided with a guide rail, and the slip ring is in sliding fit with the slide rail.
12. A refrigeration device comprising an electronic expansion valve according to any one of claims 1 to 11.
CN202310913730.XA 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment Pending CN116816950A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310913730.XA CN116816950A (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110759224.0A CN113551048B (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment
CN202310913730.XA CN116816950A (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN202110759224.0A Division CN113551048B (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment

Publications (1)

Publication Number Publication Date
CN116816950A true CN116816950A (en) 2023-09-29

Family

ID=78102682

Family Applications (6)

Application Number Title Priority Date Filing Date
CN202310912546.3A Pending CN116816948A (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment
CN202310916578.0A Pending CN116816952A (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment
CN202310913730.XA Pending CN116816950A (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment
CN202110759224.0A Active CN113551048B (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment
CN202310913715.5A Pending CN116816949A (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment
CN202310916477.3A Pending CN116816951A (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CN202310912546.3A Pending CN116816948A (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment
CN202310916578.0A Pending CN116816952A (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment

Family Applications After (3)

Application Number Title Priority Date Filing Date
CN202110759224.0A Active CN113551048B (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment
CN202310913715.5A Pending CN116816949A (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment
CN202310916477.3A Pending CN116816951A (en) 2021-07-05 2021-07-05 Electronic expansion valve and refrigeration equipment

Country Status (1)

Country Link
CN (6) CN116816948A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN214197319U (en) * 2020-12-14 2021-09-14 广东威灵电机制造有限公司 Nut, electronic expansion valve and stop structure and refrigeration equipment thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2124034B (en) * 1982-06-28 1986-09-10 Imp Clevite Inc Solenoid valve
KR101165314B1 (en) * 2004-09-17 2012-07-18 가부시기가이샤 후지고오키 Electronically operated valve
JP4714626B2 (en) * 2006-04-13 2011-06-29 株式会社不二工機 Control valve for variable displacement compressor
JP5077688B2 (en) * 2008-05-19 2012-11-21 株式会社ジェイテクト Fluid supply valve assembly device
JP6552457B2 (en) * 2016-06-22 2019-07-31 株式会社鷺宮製作所 Motorized valve
JP6691064B2 (en) * 2017-01-25 2020-04-28 株式会社鷺宮製作所 Motorized valve and refrigeration cycle system
JP6722230B2 (en) * 2018-06-20 2020-07-15 株式会社鷺宮製作所 Motorized valve
CN112901790B (en) * 2019-11-19 2022-05-10 浙江盾安禾田金属有限公司 Electronic expansion valve
CN116428371A (en) * 2020-12-14 2023-07-14 广东威灵电机制造有限公司 Electronic expansion valve and refrigeration equipment

Also Published As

Publication number Publication date
CN116816949A (en) 2023-09-29
CN116816948A (en) 2023-09-29
CN116816952A (en) 2023-09-29
CN113551048A (en) 2021-10-26
CN113551048B (en) 2023-09-26
CN116816951A (en) 2023-09-29

Similar Documents

Publication Publication Date Title
CN113551048B (en) Electronic expansion valve and refrigeration equipment
JP6178557B2 (en) Flow control valve
JP2023551273A (en) Electronic expansion valve and cooling equipment
KR20150062965A (en) Stepping motor driven control valve
US9945592B2 (en) Throttle device
CN109219716B (en) Electric valve
DE3900548A1 (en) AIR CONDITIONING AND AIR CONDITIONER WITH A COMPRESSOR WITH VARIABLE FLOW RATE
US5026022A (en) Thermostatic expansion valve for low refrigerant flow rates
CN113685558A (en) Electronic expansion valve and refrigeration equipment
CN211926179U (en) Air conditioner control system based on evaporation pressure regulating valve
CN113790275B (en) Electronic expansion valve and refrigeration equipment
JP6492129B2 (en) Flow control valve
JP6474863B2 (en) Flow control valve
JP6722230B2 (en) Motorized valve
CN111365515B (en) Electronic expansion valve and air conditioning system using same
CN212619494U (en) Mechanical expansion valve
CN111595072A (en) Mechanical expansion valve
CN110792791A (en) Valve, expansion valve and stepping control method thereof
CN217977701U (en) Valve needle assembly of electronic expansion valve
CN214466192U (en) Electronic expansion valve throttling mechanism
US20240036014A1 (en) Linear actuator for chromatography
CN215410208U (en) Electromagnetic drive's electronic expansion valve
KR100315802B1 (en) Free step rotary compressor
CN117824204A (en) Throttling device and air conditioning system
CN208619680U (en) Capillary throttle device and condenser system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination