Socket of electronic expansion valve, coil assembly and electronic expansion valve

Abstract

The utility model relates to the technical field of fluid control, in particular to a combination hub of an electronic expansion valve, a coil assembly and the electronic expansion valve. A combination hub of an electronic expansion valve comprises a wiring needle and a wiring seat, the wiring needle is arranged on the wiring seat in a penetrating mode, one end of the wiring needle extends into the wiring seat and is connected with a lead of a motor, and the other end of the wiring needle is used for being connected with an external power source. One end of the wire holder is provided with a glue pouring groove, the wiring needle is welded and connected with the lead in the glue pouring groove, and the glue pouring groove is filled with insulation glue. The utility model further provides a coil assembly of the electronic expansion valve and the electronic expansion valve. According to the utility model, each group of lead wires and wiring needles can be isolated by filling glue into the glue filling grooves, and short circuit caused by mutual contact of each group of lead wires and wiring needles is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid control technical field especially relates to a socket, coil assembly and electronic expansion valve of electronic expansion valve. BACKGROUND

[0002] Electronic expansion valve is usually used in refrigeration system as throttling element, and the electronic expansion valve comprises a coil assembly and a piston assembly, the coil assembly is used for driving the piston assembly to move, thereby controlling the medium flow at the valve port.

[0003] In the prior art, the multiple socket pins are not isolated by the insulating material after the socket pin and the lead wire are connected, if impurities adhere to the socket pin, the adjacent socket pins are easily contacted and short-circuit occurs. UTILITY MODEL CONTENTS

[0004] Therefore, it is necessary to provide a socket, coil assembly and electronic expansion valve of electronic expansion valve, which can avoid short circuit of the socket pin.

[0005] The utility model provides a socket of electronic expansion valve, including socket pin and socket, socket pin is set in socket, one end of socket pin is inserted into socket and is connected with the lead wire of motor, and the other end is used for connecting external power supply, one end of socket is provided with glue filling groove, socket pin is welded in glue filling groove with lead wire, and glue filling groove is filled with insulating glue.

[0006] Thus, the insulation strength of the socket can be enhanced, the socket pins can be prevented from contacting each other due to the adhesion of impurities, and short circuit can be avoided, and the glue filling insulation can reduce the cost.

[0007] In one embodiment, the insulating glue is epoxy glue.

[0008] Thus, the corrosion resistance and the reliability of the insulation of the socket can be enhanced.

[0009] In one embodiment, the length of the socket pin in the glue filling groove is L1, and H is greater than or equal to 2L1.

[0010] Thus, the heat influence on the connection part of the lead wire and the socket pin during glue filling can be reduced.

[0011] In one embodiment, the width of the glue filling groove is B, and 15mm≤B≤20mm.

[0012] Thus, the overall width of the socket can be limited, and the lead wire and the terminal pin can be fixedly connected.

[0013] The utility model discloses still provide a kind of coil assembly of electronic expansion valve, including shell cover, motor and above-mentioned socket of electronic expansion valve, the motor is located in the shell cover, lead wire is equipped on the motor, one end of the lead wire is inserted into the glue filling groove.

[0014] In one embodiment, the lead wire and the terminal pin are fixedly connected by soldering.

[0015] Thus, the conductivity between the lead wire and the terminal pin can be enhanced.

[0016] In one embodiment, the length of the lead wire inserted into the glue filling groove is L2, and L2≥2mm.

[0017] Thus, the insulation can be enhanced, and the thermal influence of the glue filling on the connection part of the lead wire and the terminal pin can be reduced. If L2 is too short, the connection part of the lead wire and the terminal pin is too close to the slot, and the heat generated during the glue filling can affect the soldering part of the lead wire and the terminal pin. Moreover, the thickness of the insulating glue after the glue filling cannot guarantee the insulation effect of the soldering part of the lead wire and the terminal pin.

[0018] In one embodiment, the terminal pin is a plurality of and corresponds to the lead wire one by one. The distance between the central axes of adjacent terminal pins is D1, and the distance between the soldering parts of adjacent lead wires and terminal pins is D2, and D2≥D1.

[0019] Thus, the soldering points of adjacent lead wires and terminal pins can be as far apart as possible, so that short circuit can be avoided.

[0020] In one embodiment, the terminal pin is a plurality of and corresponds to the lead wire one by one. The distance between the soldering parts of adjacent lead wires and terminal pins is D2, and D2>2.5mm.

[0021] Thus, the distance between adjacent lead wires can be guaranteed to be far enough, so that short circuit between the lead wires can be prevented.

[0022] The utility model discloses still provide a kind of electronic expansion valve, including above-mentioned coil assembly of electronic expansion valve.

[0023] The utility model discloses a glue filling groove is set, and the lead wire and the terminal pin are welded in the glue filling groove. Then, the glue filling groove is filled with glue. After the insulating glue is solidified, the lead wires and the terminal pins are isolated to prevent short circuit. The glue filling cost is low, and the process is simple. Moreover, the reliability of the insulation is strong. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0025] Figure 1 The structure schematic diagram of the plug-in socket after glue pouring is provided in the present application.

[0026] Figure 2 The structure schematic diagram of the connection mode of the wiring needle and the lead in an embodiment is provided.

[0027] Figure 3 The structure schematic diagram of the connection mode of the wiring needle and the lead in another embodiment is provided.

[0028] Figure 4 The structure schematic diagram of the electronic expansion valve is provided in the present application.

[0029] The drawings show that: 1000, electronic expansion valve; 100, coil assembly of the electronic expansion valve; 10, plug-in socket of the electronic expansion valve; 11, wiring seat; 111, glue pouring groove; 112, insulating glue; 113, positioning step; 114, accommodating groove; 12, wiring needle; 13, sheath; 131, opening; 20, shell cover; 30, motor; 31, lead; 40, connecting plate; 200, valve seat; 201, first port; 202, second port; 203, valve port; 300, piston assembly; 400, guide sleeve. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0031] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the specification of the present application are only for the purpose of illustration and do not indicate the only implementation.

[0032] Furthermore, the terms "first", "second", etc. are used only for descriptive purposes and do not connote or imply a relative importance or an ordering between or among the indicated features. Thus, a feature defined with "first", "second", etc. can include at least one of the features implicitly or explicitly. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In the present application, unless otherwise specifically defined and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature directly contacts the second feature, or the first feature indirectly contacts the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0035] The present application provides a kind of electronic expansion valve socket 10 (hereinafter referred to as socket 10), it is installed on electronic expansion valve 1000, for the coil assembly 100 of electronic expansion valve is powered.

[0036] Specifically, socket 10 includes terminal block 11 and terminal pin 12, terminal pin 12 is arranged in terminal block 11, one end of terminal pin 12 extends into terminal block 11 and is connected with the lead 31 of motor 30, the other end is used to connect external power supply.

[0037] Please see Figures 1 to 3 , Figure 1 The structure schematic diagram of socket 10 provided by the present application after pouring glue, Figure 2 It is the structure schematic diagram of the connection mode of terminal pin 12 and lead 31 in an embodiment, Figure 3Fig. 2 is a structural schematic diagram of the connection mode of the terminal pin 12 and the lead wire 31 in another embodiment. One end of the terminal block 11 is provided with a glue filling groove 111, and the terminal pin 12 is welded with the lead wire 31 in the glue filling groove 111, and the glue filling groove 111 is filled with insulating glue 112. Since the circuit is conducted when the lead wire 31 is connected with the terminal pin 12, and both the lead wire 31 and the terminal pin 12 are multiple, the glue filling in the glue filling groove 111 can isolate each group of the lead wire 31 and the terminal pin 12, prevent the short circuit caused by the contact between each group of the lead wire 31 and the terminal pin 12, has good insulating effect, and has low glue filling cost.

[0038] Preferably, the insulating glue 112 is epoxy glue, which has strong chemical stability, corrosion resistance, and high adhesive strength. The epoxy glue material is liquid, which is solidified after being filled into the glue filling groove 111, has a suitable temperature range of -50° to +150°, and a water absorption rate of less than 0.1%, has a wide application range, and the low water absorption rate can ensure that the connection part of the lead wire 31 and the terminal pin 12 will not be short-circuited due to water contact, and ensure the reliability of insulation.

[0039] Further, referring to Fig. 3, Figure 2 , Figure 2 Fig. 3 is a structural schematic diagram of the connection mode of the terminal pin 12 and the lead wire 31 in an embodiment. The width of the glue filling groove 111 is B, and B satisfies the range of 15≤B≤20mm. The appropriate width can not only limit the overall width of the terminal block 10, but also facilitate the welding of the lead wire 31 and the terminal pin 12. It can be understood that if the width is too small, the installer will not be convenient to operate when connecting the lead wire 31 and the terminal pin 12, and if the width is too large, the volume of the terminal block 10 will be increased. The width B of the glue filling groove 111 can be 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, or any other value between 15mm and 20mm.

[0040] The depth of the glue filling groove 111 is H, and the length of the terminal pin 12 in the glue filling groove 111 is L1, and H≥2L1. In this way, the heat influence on the connection part of the lead wire 31 and the terminal pin 12 during glue filling can be reduced. It can be understood that the glue filling is performed in the slot of the glue filling groove 111, and the glue will generate heat during glue filling. The welding part of the lead wire 31 and the terminal pin 12 is arranged at a certain distance from the slot. When the glue flows to the welding part of the lead wire 31 and the terminal pin 12, the temperature of the glue has been reduced, thereby reducing the heat influence and avoiding the melting of the welding part between the lead wire 31 and the terminal pin 12 caused by too high temperature, which leads to the disconnection. On the other hand, the welding part of the lead wire 31 and the terminal pin 12 is deep enough, and the insulating glue 112 has sufficient thickness to isolate each group of the lead wire 31 and the terminal pin 12, thereby enhancing the insulation. The depth H of the glue filling groove 111 can be 2L1, 3L1, 4L1, or any value greater than 2L1.

[0041] The end face of the connector 10 with the glue pouring groove 111 is provided with a positioning step 113, which is used for positioning other parts and facilitates the fixing of the connector 10 and other parts.

[0042] Further, the connector 10 further comprises a sheath 13, the end of the terminal seat 11 away from the glue pouring groove 111 is provided with a receiving groove 114, the sheath 13 is arranged in the receiving groove 114, one end of the terminal pin 12 is arranged in the sheath 13, and the end of the sheath 13 away from the glue pouring groove 111 is provided with an opening 131. The sheath 13 forms a protection for the terminal pin 12 and forms a connection end of the wire, which can cooperate with an external terminal.

[0043] The utility model also provides a coil assembly 100 (hereinafter referred to as coil assembly 100) of electronic expansion valve, including shell cover 20, motor 30 and above-mentioned connector 10, connector 10 is located at one end of shell cover 20, motor 30 is located in shell cover 20, motor 30 has lead 31, and one end of lead 31 is inserted into glue pouring groove 111.

[0044] One end of shell cover 20 is arranged on the positioning step 113, and the connector 10 is fixedly connected by laser welding.

[0045] The lead 31 and the terminal pin 12 are fixedly connected by soldering, which can enhance the conductivity between the lead 31 and the terminal pin 12.

[0046] The length of the lead 31 inserted into the glue pouring groove 111 is L2, and L2≥2mm. Similarly, the lead 31 is inserted into the glue pouring groove 111 enough, which can not only enhance the insulation, but also reduce the thermal influence of the glue on the connecting part of the lead 31 and the terminal pin 12. The length L2 of the lead 31 inserted into the glue pouring groove 111 can be 2mm, 3mm, 3mm, 4mm or any other value above 2mm.

[0047] Please refer to Figure 2 and Figure 3 In an embodiment, the terminal pin 12 is a plurality of, the lead 31 is also a plurality of, the terminal pin 12 and the lead 31 correspond one by one, the distance between the central axes of adjacent terminal pins 12 is D1, the distance between the welding positions of adjacent leads 31 and adjacent terminal pins 12 is D2, and D2≥D1, which can ensure that the distance between the welding positions of adjacent leads 31 and terminal pins 12 is far enough, thereby avoiding short circuit caused by contact between the welding positions. It should be explained that the plurality of herein includes 2 and more than 2.

[0048] Further, D2 satisfies D2>2.5mm, and it can be known that the distance between the connecting positions of adjacent leads 31 and terminal pins 12 is large enough, which can avoid short circuit caused by contact between the connecting positions. D2 can be 2.6mm, 3mm, 4mm or any other value above 2.5mm.

[0049] The lead wire 31 can be in contact with the side surface of the terminal pin 12, and welding is performed at the contact position, or the end surface of the lead wire 31 and the end surface of the terminal pin 12 can be in contact, and welding is performed at the contact position.

[0050] The diameter of the terminal pin 12 is greater than the diameter of the core of the lead wire 31, so that the core of the lead wire 31 can be in sufficient contact with the terminal pin 12, and the welding strength is increased.

[0051] The coil assembly 100 further comprises a connecting plate 40 arranged at one end of the shell cover 20 and used for mounting the motor 30.

[0052] Please refer to Figure 4 , Figure 4 The utility model provides a structure diagram of electronic expansion valve 1000, and further provides an electronic expansion valve 1000, which comprises the coil assembly 100 and is applied to a refrigeration system, and realizes the throttling pressure reduction effect through the control of medium flow.

[0053] The electronic expansion valve 1000 further comprises a valve seat 200, a piston assembly 300 and a guide sleeve 400, the valve seat 200 is provided with a first port 201, a second port 202 and a valve port 203, the first port 201 and the second port 202 penetrate the side wall of the valve seat 200 and are used for connecting the medium, and the first port 201 and the second port 202 are connected through the valve port 203 in the valve seat 200; one end of the guide sleeve 400 extends into the valve seat 200 and is sealingly connected with the valve seat 200, the other end is connected with the shell cover 20, one part of the piston assembly 300 is arranged in the valve seat 200, and the other part is arranged in the guide sleeve 400, one end of the piston assembly 300 is connected with the coil assembly 100, the coil assembly 100 drives the piston assembly 300 to move, so that the piston assembly 300 can adjust the opening degree of the valve port 203.

[0054] In an embodiment, the axis of the first port 201 and the axis of the second port 202 are arranged in parallel, and the axis of the piston assembly 300 is arranged obliquely relative to the axis of the first port 201 and the axis of the second port 202, so that the overall height of the electronic expansion valve 1000 can be reduced, and the installation space can be saved. In other embodiments, the axis of the valve port 203 and the axis of the first port 201 and the axis of the second port 202 can be perpendicular, the axis of the first port 201 and the axis of the second port 202 can be parallel, or the axis of the first port 201 and the axis of the valve port 203 can be parallel, and the axis of the valve port 203 and the axis of the second port 202 can be perpendicular, which can be adjusted according to different application scenarios.

[0055] In the installation process, the lead wire 31 is extended into the glue filling groove 111, the lead wire 31 and the connecting pin 12 are connected by tin soldering, and then glue is filled in the notch of the glue filling groove 111. After the insulation glue 112 is cured, each group of lead wires 31 and connecting pins 12 are insulated and isolated, which can prevent short circuit, and has low cost and high reliability.

[0056] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, but it should be understood that any combination of the technical features that does not result in a contradiction falls within the scope of the present disclosure.

[0057] Those skilled in the art should recognize that the above embodiments are used to illustrate the present application, but are not used as a limitation of the present application. Any appropriate changes and variations to the above embodiments within the spirit and principles of the present application fall within the scope of the present application.

Claims

1. An electronic expansion valve connector, comprising a connector pin (12) and a connector seat (11), the connector pin (12) being arranged in the connector seat (11), one end of the connector pin (12) extending into the connector seat (11) and connected with a lead wire (31) of a motor (30), and the other end being used for connecting an external power supply. characterized in that One end of the connector seat (11) is provided with a glue filling groove (111), the connector pin (12) is welded with the lead wire (31) in the glue filling groove (111), and the glue filling groove (111) is filled with insulating glue (112).

2. The electronic expansion valve connector according to claim 1, wherein The insulating glue (112) is epoxy glue.

3. The electronic expansion valve junction according to claim 1, wherein The depth of the glue filling groove (111) is H, the length of the connector pin (12) in the glue filling groove (111) is L1, and H≥2L1.

4. The electronic expansion valve junction according to claim 1, wherein The width of the glue filling groove (111) is B, and 15≤B≤20mm.

5. A coil assembly of an electronic expansion valve, characterized by, An electronic expansion valve connector according to any one of claims 1-4, comprising a shell cover (20), a motor (30) arranged in the shell cover (20), and a lead wire (31) arranged on the motor (30), one end of the lead wire (31) extending into the glue filling groove (111).

6. The coil assembly of an electronic expansion valve according to claim 5, wherein The lead wire (31) and the connector pin (12) are fixedly connected by tin soldering.

7. The coil assembly of an electronic expansion valve according to claim 5, wherein The length of the lead wire (31) extending into the glue filling groove (111) is L2, and L2≥2mm.

8. The coil assembly of an electronic expansion valve according to claim 5, wherein The connector pin (12) is in one-to-one correspondence with the lead wire (31), the distance between the central axes of adjacent connector pins (12) is D1, and the distance between the welding positions of adjacent lead wires (31) and adjacent connector pins (12) is D2, D2≥D1.

9. The coil assembly of an electronic expansion valve according to claim 5, wherein The connector pin (12) is in one-to-one correspondence with the lead wire (31), the distance between the welding positions of adjacent lead wires (31) and adjacent connector pins (12) is D2, and D2>2.5mm.

10. An electronic expansion valve characterized by A coil assembly of the electronic expansion valve according to any one of claims 5-9.

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