CN217539637U

CN217539637U - Electronic expansion valve

Info

Publication number: CN217539637U
Application number: CN202221509906.2U
Authority: CN
Inventors: 陈超; 曾庆军; 刘文金; 杨茂
Original assignee: Guangdong Welling Motor Manufacturing Co Ltd
Current assignee: Guangdong Welling Motor Manufacturing Co Ltd
Priority date: 2022-06-16
Filing date: 2022-06-16
Publication date: 2022-10-04
Anticipated expiration: 2032-06-16

Abstract

The utility model discloses an electronic expansion valve, which comprises a valve seat, a valve port component and a first connecting pipe; the valve port assembly is arranged at the first end of the valve seat and comprises a positioning section and an extension section, the extension section is connected with the positioning section, the positioning section is provided with a first abutting surface abutting against the inner wall of the valve seat and a second abutting surface connecting the first abutting surface and the outer wall of the extension section; a first gap is formed between the outer wall of the first connecting pipe and the inner wall of the first end, and the distance between the inner wall of the first connecting pipe and the outer wall of the extension section is more than 1mm; wherein the first end is provided with solder therein; or, the welding material is arranged on the outer wall of the first connecting pipe; when the solder melts, it may flow into the first gap. The utility model discloses electronic expansion valve disk seat and valve port subassembly components of a whole that can function independently design can reduce the processing degree of difficulty of disk seat and valve port subassembly.

Description

Electronic expansion valve

Technical Field

The utility model relates to a fluid control part technical field, in particular to electronic expansion valve.

Background

The electronic expansion valve is an important part in a refrigeration system and mainly plays roles in throttling, reducing pressure and regulating flow. In the related art, the electronic expansion valve includes a valve seat, a nut, and a valve needle assembly in threaded engagement with the nut, and the valve needle assembly is driven by a driving device to generate axial movement to adjust the opening of the valve port, thereby achieving circulation control. The valve seat and the valve port component of the existing electronic expansion valve are generally integrally formed, the processing difficulty is high, and internal leakage is easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electronic expansion valve aims at reducing the processing degree of difficulty of disk seat and valve port subassembly.

In order to achieve the above object, the present invention provides an electronic expansion valve, including:

a valve seat including opposing first and second ends;

the valve port assembly is arranged at the first end and comprises a positioning section and an extension section, the positioning section is provided with a first abutting surface abutting against the inner wall of the valve seat and a second abutting surface connecting the first abutting surface and the outer wall of the extension section; and

one end of the first connecting pipe extends into the space between the inner wall of the first end and the outer wall of the extension section, a first gap is formed between the outer wall of the first connecting pipe and the inner wall of the first end, and the distance between the inner wall of the first connecting pipe and the outer wall of the extension section is larger than 1mm;

wherein the first end is provided with solder therein; or the welding material is arranged on the outer wall of the first connecting pipe;

when the solder melts, it may flow into the first gap.

In an embodiment, the first gap and the second gap are both less than 0.2mm.

In one embodiment, the length of the first adapter inserted into the first end is greater than 1mm.

In an embodiment, the solder is disposed in the first end, a second gap is formed between the first connection pipe and the second abutting surface, the second abutting surface is provided with a first groove, the first groove is communicated with the first gap through the second gap, and the solder is disposed in the first groove.

In an embodiment, the center of the solder is flush with the second abutting surface.

In an embodiment, the solder is disposed on an outer wall of the first connection pipe, and the solder abuts against an end surface of the first end, or a second groove is disposed on the end surface of the first end, and the second groove is communicated with the first gap, and the solder is disposed in the second groove.

In one embodiment, the inner wall of the valve seat is provided with a step surface, and one side of the positioning section, which is away from the second abutting surface, abuts against the step surface.

In one embodiment, the solder is annularly disposed.

In one embodiment, the electronic expansion valve further comprises a valve needle assembly having a valve port, and the valve needle assembly is movably disposed on the valve seat to open or close the valve port.

In an embodiment, the electronic expansion valve further comprises a housing, the housing is connected to the second end and forms a receiving cavity for receiving the valve needle assembly.

In an embodiment, the electronic expansion valve further includes a nut component and a rotor component disposed in the accommodating cavity, the rotor component is connected to the valve needle component, and the nut component is in threaded connection with the valve needle component.

The electronic expansion valve of the utility model comprises a valve seat, a valve port component and a first connecting pipe; the valve seat includes opposing first and second ends; the valve port assembly is arranged at the first end and comprises a positioning section and an extension section, wherein the positioning section is provided with a first abutting surface abutting against the inner wall of the valve seat and a second abutting surface connecting the first abutting surface and the outer wall of the extension section; one end of the first connecting pipe extends into a position between the inner wall of the first end and the outer wall of the extension section, a first gap is formed between the outer wall of the first connecting pipe and the inner wall of the first end, and the distance between the inner wall of the first connecting pipe and the outer wall of the extension section is larger than 1mm; wherein the first end is provided with solder; or, the welding material is arranged on the outer wall of the first connecting pipe; when the solder melts, it may flow into the first gap. The valve seat, the valve port assembly and the first connecting pipe are welded together through the tunnel furnace, the welding flux is melted during welding, and the welding flux fills a first gap between the valve seat and the first connecting pipe through capillary action, so that the valve seat, the valve port assembly and the first connecting pipe are fixedly connected. The utility model discloses electronic expansion valve's disk seat and valve port subassembly components of a whole that can function independently design, the disk seat can standardize, does benefit to parts machining such as valve port subassembly, disk seat, reduces the processing degree of difficulty, improves the internal leakage. In addition, a liquid storage area is arranged between the valve port assembly and the first connecting pipe, and when the electronic expansion valve works, the liquid storage area is filled with refrigerant, so that fluid noise can be effectively reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of an electronic expansion valve according to the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a schematic diagram of a portion of the electronic expansion valve of FIG. 1;

fig. 4 is a schematic structural diagram of a valve port assembly of the electronic expansion valve of fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Electronic expansion valve	212	Second abutting surface
100	Valve seat	212a	The first groove
				110	First end	220	Extension section
120	Second end	230	Valve port
				130	Step surface	300	First connecting pipe
140	Connecting port	400	First gap
				150	Valve cavity	500	Second gap
200	Valve port assembly	600	Solder
				210	Positioning section	700	Second connecting pipe
211	First abutting surface

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides an electronic expansion valve's embodiment, electronic expansion valve is an important part among the refrigerating system, mainly plays the effect of throttle step-down and regulation flow. The conventional electronic expansion valve comprises a valve seat, a nut and a valve needle assembly in threaded fit with the nut, and a driving device is used for driving the valve needle assembly to generate axial motion to adjust the opening degree of a valve port, so that circulation control is realized. The technical scheme of the utility model provide an electronic expansion valve, valve seat 100, valve port subassembly 200 and first takeover 300 are crossed the tunnel furnace welding together, and solder 600 melts during the welding, and solder 600 fills up valve seat 100 and first clearance 400 between takeover 300 through capillary, and then realizes the fixed connection of valve seat 100, valve port subassembly 200 and first takeover 300. The utility model discloses electronic expansion valve's disk seat 100 and the components of a whole that can function independently design of valve port subassembly 200, disk seat 100 can be standardized, do benefit to parts machining such as valve port subassembly 200, disk seat 100, reduce the processing degree of difficulty, improve the internal leakage. In addition, a liquid storage area is arranged between the valve port assembly 200 and the first connecting pipe 300, and when the electronic expansion valve works, the liquid storage area is filled with refrigerant, so that fluid noise can be effectively reduced.

The utility model discloses an electronic expansion valve can use in air conditioning system, and the fluid medium that flows through electronic expansion valve is the refrigerant that is used for carrying out the cold and heat exchange among the air conditioning system. At this time, the electronic expansion valve is installed at the inlet of the evaporator of the air conditioning system, and the electronic expansion valve is used as a boundary element between the high-pressure side and the low-pressure side of the air conditioning system, so that the high-pressure liquid refrigerant from the liquid storage drier and other devices is throttled and depressurized, the dosage of the liquid refrigerant entering the evaporator is adjusted and controlled, and the dosage of the liquid refrigerant can meet the requirement of the external refrigeration load. Alternatively, the electronic expansion valve is applied to other types of refrigeration equipment, the fluid medium flowing through the electronic expansion valve may also be other fluid media except for the refrigerant, as long as the electronic expansion valve can throttle and depressurize the fluid medium, which is not particularly limited.

Referring to fig. 1 to 4, in an embodiment of the present invention, the electronic expansion valve 10 includes a valve seat 100, a valve port assembly 200, and a first connection pipe 300; the valve seat 100 includes opposing first and

second ends

110, 120; the valve port assembly 200 is disposed at the first end 110, the valve port assembly 200 comprises a positioning section 210 and an extension section 220, the positioning section 210 has a first abutment surface 211 abutting against the inner wall of the valve seat 100, and a second abutment surface 212 connecting the first abutment surface 211 and the outer wall of the extension section 220; one end of the first connection pipe 300 extends between the inner wall of the first end 110 and the outer wall of the extension section 220, a first gap 400 is formed between the outer wall of the first connection pipe 300 and the inner wall of the first end 110, and the distance between the inner wall of the first connection pipe 300 and the outer wall of the extension section 220 is greater than 1mm; wherein, a solder 600 is arranged in the first end 110; or, the solder 600 is disposed on the outer wall of the first adapter tube 300; when the solder 600 melts, it may flow into the first gap 400.

Specifically, the valve seat 100 is machined from a stainless steel material, and the valve seat 100 is disposed in a substantially cylindrical shape. It is understood that in other embodiments, the valve seat 100 can be made of other materials, but not limited thereto, the valve seat 100 can also be made of other shapes besides a cylinder. The electronic expansion valve 10 further includes a second connection pipe 700, the valve seat 100 is provided with a connection port 140, the second connection pipe 700 is disposed at the connection port 140, a valve cavity 150 is formed in the valve seat 100, and the connection port 140 and the valve port 230 can be communicated through the valve cavity 150. Fluid medium may flow into the valve chamber 150 from either the connection port 140 or the valve port 230 and out the other port. In the present embodiment, the fluid medium flows into the electronic expansion valve 10 from the second connection pipe 700, and flows out from the first connection pipe 300, i.e., flows into the valve chamber 150 from the connection port 140, and flows out through the valve port 230. Meanwhile, the valve seat 100 and the valve port assembly 200 of the electronic expansion valve 10 of the present embodiment are designed separately, which is beneficial to the processing of the valve port assembly 200, the valve seat 100 and other parts, reduces the processing difficulty, and can improve the internal leakage problem of the electronic expansion valve 10.

The valve port assembly 200 is disposed at the first end 110 of the valve seat 100, the valve port assembly 200 has a valve port 230, one end of the first connection pipe 300 extends between the inner wall of the first end 110 and the outer wall of the extension section 220, and a first gap 400 is formed between the inner wall of the first connection pipe 300 and the outer wall of the extension section 220, wherein the distance between the inner wall of the first connection pipe 300 and the outer wall of the extension section 220 is greater than 1mm, so that a space formed between the inner wall of the first connection pipe 300 and the outer wall of the extension section 220 can be used as a liquid storage area, and when the electronic expansion valve 10 operates, the liquid storage area is filled with refrigerant, which can effectively reduce the noise of a fluid medium.

Referring to fig. 1 to 4, the solder 600 is disposed in the first end 110, and specifically, when the first adapter tube 300 and the valve seat 100 are soldered, the solder 600 flows into the first gap 400 by capillary action after melting and flows out to the outer surface of the valve seat 100 along the first gap 400, so that an operator can visually observe the flowing-out condition of the solder 600, thereby facilitating manual quality inspection and control after soldering, and then, after the solder 600 is cooled, the first adapter tube 300 and the valve seat 100 are soldered together, and the whole soldering process is completed. The capillary action refers to a phenomenon in which the infiltrating liquid rises in a thin tube. Capillary action occurs essentially because of capillary forces-a very thin tube is inserted into the water, a concave surface is formed in the tube due to wetting, and the middle concave surface pulls the water below upward due to the tendency of the liquid surface to flatten out automatically, which is the capillary force.

Of course, in another embodiment, the solder 600 may also be disposed on an outer wall of the first connection pipe 300, specifically, sleeved on the outer wall of the first connection pipe 300, and may abut against an end surface of the first end 110 of the valve seat 100, when the first connection pipe 300 and the valve seat 100 are welded, the solder 600 will directly flow into the first gap 400 through capillary action after being melted, so that the first connection pipe 300 and the valve seat 100 are welded together, and the whole welding process is completed.

The electronic expansion valve 10 of the present invention comprises a valve seat 100, a valve port assembly 200 and a first connecting pipe 300; the valve seat 100 includes opposing first and second ends 110, 120; the valve port assembly 200 is disposed at the first end 110, the valve port assembly 200 comprises a positioning section 210 and an extension section 220, the positioning section 210 has a first abutment surface 211 abutting against the inner wall of the valve seat 100, and a second abutment surface 212 connecting the first abutment surface 211 and the outer wall of the extension section 220; one end of the first connection pipe 300 extends between the inner wall of the first end 110 and the outer wall of the extension section 220, a first gap 400 is formed between the outer wall of the first connection pipe 300 and the inner wall of the first end 110, and the distance between the inner wall of the first connection pipe 300 and the outer wall of the extension section 220 is greater than 1mm; wherein the first end 110 is provided with solder 600 therein; or, the solder 600 is disposed on the outer wall of the first adapter tube 300; when the solder 600 melts, it may flow into the first gap 400. The valve seat 100, the valve port assembly 200 and the first adapter tube 300 are welded together in a tunnel furnace, and during welding, the solder 600 melts, and the solder 600 fills the first gap 400 between the valve seat 100 and the first adapter tube 300 through capillary action, thereby realizing the fixed connection of the valve seat 100, the valve port assembly 200 and the first adapter tube 300. The utility model discloses electronic expansion valve's disk seat 100 and the components of a whole that can function independently design of valve port subassembly 200, disk seat 100 can be standardized, do benefit to parts machining such as valve port subassembly 200, disk seat 100, reduce the processing degree of difficulty, improve the internal leakage. In addition, a liquid storage area is arranged between the valve port assembly 200 and the first connecting pipe 300, and when the electronic expansion valve works, the liquid storage area is filled with refrigerant, so that the fluid noise can be effectively reduced.

Referring to fig. 1 to 4, in an embodiment, the first gap 400 and the second gap 500 are both smaller than 0.2mm. Specifically, in order to ensure that the solder 600 melts into a liquid state, the liquid solder 600 may first flow into the second gap 500 by capillary action, then flow to the first gap 400 through the second gap 500, and flow out to the outer surface of the valve seat 100 along the first gap 400, so that the outflow of the solder 600 can be observed by the naked eye of the operator, and therefore, the gap size of the first gap 400 and the second gap 500 needs to be ensured, and preferably, the first gap 400 and the second gap 500 are both less than 0.2mm.

Further, the length of the first adapter tube 300 inserted into the first end 110 is greater than 1mm. Specifically, the length of the first adapter tube 300 inserted into the first end 110 is set to be D, and in order to ensure the stability and the firmness of the welding between the first adapter tube 300 and the valve seat 100, the length D of the first adapter tube 300 extending into the port should not be too short, and should be kept to be D > 1mm. Meanwhile, since the amount of the solder 600 is constant, the length D of the first adapter 300 extending into the port is not too long, which is determined according to practical situations and is not particularly limited.

Referring to fig. 1 to 4, in an embodiment, the solder 600 is disposed in the first end 110, a second gap 500 is formed between the first adapter tube 300 and the second abutting surface 212, the second abutting surface 212 is provided with a first groove 212a, the first groove 212a is communicated with the first gap 400 through the second gap 500, and the solder 600 is disposed in the first groove 212a. In this embodiment, the material of the valve seat 100 is a stainless steel material, and the material of the first adapter 300 is a copper material, but in other embodiments, the materials of the valve seat 100 and the first adapter 300 may be other materials, and this is not particularly limited. In general, when the first adapter tube 300 and the valve seat 100 are welded together, since the expansion coefficient of the copper material is greater than that of the stainless material, a gap (i.e., the first gap 400 and the second gap 500) is formed at the joint of the first adapter tube 300 and the valve seat 100 (i.e., at the first gap 400 and the second gap 500) after heating, and therefore, it is necessary to make the melted solder 600 flow into the gap to fill the gap, and solidify after cooling, thereby performing a function of welding the first adapter tube 300 and the valve seat 100 together. Of course, in other embodiments, when the valve seat 100 and the first adapter tube 300 are made of other materials, the joint between the first adapter tube 300 and the valve seat 100 may be configured to have a gap after the assembly is completed, and the melted solder 600 flows into the gap to fill the gap, and solidifies after cooling, so as to function to weld the first adapter tube 300 and the valve seat 100 together.

Referring to fig. 1 to 4, the solder 600 is disposed in the first groove 212a, specifically, when the first adapter tube 300 and the valve seat 100 are soldered, the solder 600 flows into the second gap 500 by capillary action after melting, then flows into the first gap 400 through the second gap 500, and flows out to the outer surface of the valve seat 100 along the first gap 400, so that an operator can visually observe the outflow of the solder 600, thereby facilitating manual quality inspection and control after soldering, and then, after the solder 600 is cooled, the first adapter tube 300 and the valve seat 100 are soldered together, and the whole soldering process is completed.

Referring to fig. 1 to 4, in an embodiment, a center of the solder 600 is flush with the second abutting surface 212. Specifically, the first adapter tube 300 and the second abutting surface 212 form a second gap 500, and the center of the solder 600 is flush with the second abutting surface 212, that is, the center of the solder 600 is opposite to the second gap 500, so that when the solder 600 is heated and melted, the liquid solder 600 can flow into the second gap 500 through capillary action.

In an embodiment, the solder 600 is disposed on an outer wall of the first adapter 300, and the solder 600 abuts against an end surface of the first end 110, or a second groove is disposed on the end surface of the first end 110, the second groove is communicated with the first gap 400, and the solder 600 is disposed in the second groove (not shown). This arrangement facilitates the direct flow of the solder 600 into the first gap 400 by capillary action after the solder is melted by heating.

Referring to fig. 3 and fig. 4, in an embodiment, a step surface 130 is disposed on an inner wall of the valve seat 100, and a side of the positioning segment 210 departing from the second abutting surface 212 abuts against the step surface 130. Specifically, the step surface 130 is attached to a side of the positioning section 210 of the valve port assembly 200 away from the second abutting surface 212, so as to facilitate installation of the valve port assembly 200, to enable the installation position of the valve port assembly 200 to be accurate, and to prevent the valve port assembly 200 from sliding into the valve cavity 150 during installation and being instable when the diameter of the port is the same as the diameter of the valve cavity 150.

In one embodiment, the solder 600 is disposed in a ring shape. Of course, in other embodiments, the solder 600 may be disposed in a block shape, and the plurality of solders 600 are arranged in the groove at intervals along the circumferential direction of the valve seat 100, or the solder 600 may be disposed in a sphere shape, and the plurality of solders 600 are arranged in the groove at intervals along the circumferential direction of the valve seat 100, and the shape of the solder 600 has various designs, as long as the solder 600 can fully fill the first gap 400 and the second gap 500 when the valve seat 100 and the first adapter tube 300 are welded, which is not particularly limited.

In an embodiment, the electronic expansion valve 10 further comprises a valve needle assembly (not shown), wherein the valve needle assembly 200 has a valve port 230, and the valve needle assembly is movably disposed on the valve seat 100 to open or close the valve port 230. A guide sleeve (not shown) is further disposed in the valve seat 100, and the guide sleeve is fixedly mounted on the valve seat 100 and is used for guiding the movement of the valve needle assembly. Specifically, the valve needle assembly is movably disposed on the valve seat 100 and passes through the guide sleeve to open or close the valve port 230, such that the first adapter 300 and the second adapter 700 are communicated or blocked. The valve needle assembly has a screw and a valve needle connected to the screw, and the valve needle assembly is mounted on the valve seat 100, and the valve needle passes through the guide sleeve to open or close the valve port 230. Further, the valve port 230 is communicated with the connection port 140, and the valve port 230 is used for the needle of the needle assembly to extend, so as to block the fluid medium in the electronic expansion valve 10 from being discharged to the outside through the valve port 230. When the valve needle assembly closes the valve port 230, that is, the connection port 140 and the valve port 230 are disconnected from each other, the electronic expansion valve 10 is closed, and the fluid medium cannot flow from the second connection pipe 700 to the first connection pipe 300; when the valve needle assembly unseals the valve port 230, that is, the connection port 140 and the valve port 230 communicate with each other, the electronic expansion valve 10 is opened, and the fluid medium can flow from the second connection pipe 700 to the first connection pipe 300. The guide sleeve may be integrally provided with the valve seat 100 or may be separately provided, which is not particularly limited.

In an embodiment, the electronic expansion valve 10 further comprises a housing (not shown), which is connected to the second end 120 and forms a receiving cavity for receiving the valve needle assembly. Specifically, the housing is substantially cylindrical, the housing is sleeved on an end of the valve seat 100 away from the valve cavity 150, and the housing and the valve seat 100 can be fixed by welding. The housing and one end of the valve seat 100 far away from the valve cavity 150 are connected and then enclose to form an accommodating cavity for accommodating the valve needle assembly, and the valve needle assembly is mounted on the valve seat 100 and is located in the accommodating cavity.

In one embodiment, the electronic expansion valve 10 further includes a nut assembly (not shown) and a rotor assembly (not shown) disposed in the accommodating chamber, the rotor assembly is connected to the valve needle assembly, and the nut assembly is threadedly connected to the valve needle assembly. Specifically, the nut component is provided with a nut, the nut is in threaded connection with a screw rod of the valve needle component, the rotor component is fixedly connected with the screw rod, and due to the fact that the nut and the screw rod are in fit relation, the screw rod and the rotor component fixedly connected with the screw rod and the like can move in a telescopic mode along the axis direction of the screw rod, and therefore the moving process that the screw rod drives the valve needle component is achieved.

The working principle of the electronic expansion valve 10 is as follows:

the stator assembly generates a magnetic field after being electrified, the rotor made of magnetic materials rotates under the driving of the magnetic field, the rotor is fixedly connected with the screw rod, the rotation of the rotor drives the screw rod to rotate, a nut-screw rod matching relation is formed between the screw rod and the nut, and the nut assembly is fixedly arranged on the valve seat 100, so that the rotation of the screw rod relative to the nut can drive the screw rod to move relative to the nut in a telescopic mode, the stator assembly drives the rotor assembly to move, and the rotor assembly drives the valve needle assembly to move in a working process;

the valve needle moves towards the valve port 230 under the driving of the screw rod, and when the valve needle closes the valve port 230, that is, the connection port 140 is disconnected from the valve port 230, the electronic expansion valve 10 is closed; when the valve needle releases the sealing of the valve port 230, that is, the connection port 140 and the valve port 230 are communicated with each other, the electronic expansion valve 10 is opened, and the opening aperture of the valve port 230 in the electronic expansion valve 10 is relatively small, so that the flow rate of the fluid medium is reduced, and the process of throttling and depressurizing the fluid medium by the electronic expansion valve 10 is realized.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. An electronic expansion valve, comprising:

a valve seat including opposing first and second ends;

the valve port assembly is arranged at the first end and comprises a positioning section and an extension section, wherein the positioning section is provided with a first abutting surface abutting against the inner wall of the valve seat and a second abutting surface connecting the first abutting surface and the outer wall of the extension section; and

wherein the first end is provided with solder; or, the welding material is arranged on the outer wall of the first connecting pipe;

when the solder melts, it may flow into the first gap.

2. The electronic expansion valve according to claim 1, wherein the solder is disposed in the first end, a second gap is formed between the first adapter tube and the second abutting surface, and both the first gap and the second gap are smaller than 0.2mm.

3. The electronic expansion valve of claim 1, wherein the length of the first adapter inserted into the first end is greater than 1mm.

4. The electronic expansion valve according to claim 1, wherein the solder is disposed in the first end, a second gap is formed between the first connection pipe and the second abutting surface, the second abutting surface is provided with a first groove, the first groove is communicated with the first gap through the second gap, and the solder is disposed in the first groove.

5. The electronic expansion valve of claim 4, wherein a center of the solder is flush with the second abutment surface.

6. The electronic expansion valve according to claim 1, wherein the solder abuts an end face of the first end, or wherein the end face of the first end is provided with a second groove communicating with the first gap, the solder being provided in the second groove.

7. The electronic expansion valve according to claim 1, wherein the inner wall of the valve seat is provided with a step surface, and a side of the positioning section facing away from the second abutment surface abuts against the step surface.

8. An electronic expansion valve according to any of claims 1 to 7, wherein the solder is arranged in a ring.

9. The electronic expansion valve of any of claims 1-7, further comprising a valve needle assembly having a valve port, the valve needle assembly being movably disposed on the valve seat to open or close the valve port.

10. The electronic expansion valve of claim 9, further comprising a housing coupled to the second end and defining a receiving chamber for receiving the valve needle assembly.

11. The electronic expansion valve of claim 10, further comprising a nut assembly and a rotor assembly disposed in the receiving chamber, wherein the rotor assembly is coupled to the valve needle assembly, and wherein the nut assembly is threadably coupled to the valve needle assembly.