Electronic expansion valve and refrigeration equipment

Abstract

The invention discloses an electronic expansion valve and refrigeration equipment, the electronic expansion valve comprises a valve body, a coil and an insulation wire protection part, the coil comprises a protective cover and a stator assembly, the valve body is installed on the protective cover, the stator assembly comprises a metal shell, a framework and a winding, the framework is provided with a winding groove, and the winding groove is formed in the metal shell. The winding is wound on the framework and located in the winding groove, the metal shell is connected to the protective cover and located at an opening of the winding groove so that an insulation gap can be formed between the metal shell and the winding, the insulation gap is filled with an insulation layer, the insulation wire protection part is used for allowing a wire part to penetrate through, and the metal shell is connected to the protective cover and located at the opening of the winding groove. And the insulating wire protection part, the insulating layer and the protective cover are integrally formed by injection molding. According to the technical scheme, the production cycle of the electronic expansion valve is shortened, and the production cost of the electronic expansion valve is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and particularly to an electronic expansion valve and a refrigeration equipment. Background Art

[0002] An electronic expansion valve includes a valve body, a coil component and a rotor component. The coil component generates a magnetic field when powered on to drive the rotor component to rotate, so as to drive a valve core component in the valve body to move, thereby adjusting the opening of the valve port. The coil component includes a winding and a lead wire, and needs to maintain electrical insulation from the outside.

[0003] However, the existing electronic expansion valve has many components, so that more production and processing processes are required for electrical insulation of the electronic expansion valve, thus increasing the production cycle and production cost of the electronic expansion valve. Summary of the Invention

[0004] The main object of the present invention is to provide an electronic expansion valve, aiming to shorten the production cycle of the electronic expansion valve and reduce the production cost of the electronic expansion valve.

[0005] To achieve the above object, the electronic expansion valve proposed by the present invention includes

[0006] A valve body;

[0007] A coil, the coil includes a protective cover and a stator assembly, the valve body is installed in the protective cover, the stator assembly includes a metal shell, a skeleton and a winding, a winding groove is provided on the skeleton, the winding is wound around the skeleton and is located in the winding groove, the metal shell is connected to the protective cover and is located at the opening of the winding groove, so that an insulating gap is formed between the metal shell and the winding, and an insulating layer is filled in the insulating gap; and

[0008] An insulating wire protection part, the insulating wire protection part is used for the insertion of a wire component, and the insulating wire protection part, the insulating layer and the protective cover are integrally injection-molded.

[0009] Optionally, the insulating wire protection part extends along the radial direction of the winding.

[0010] Optionally, the wire component includes a pin, a circuit board, a wire and a leather sleeve, the leather sleeve is sleeved on the wire, the pin is electrically connected to the circuit board, the wire is electrically connected to the circuit board, and the circuit board, the pin and a part of the leather sleeve are wrapped in the insulating wire protection part.

[0011] Optionally, the electronic expansion valve further includes a pole piece, the pole piece is installed on the skeleton, and the metal shell is electrically connected to the pole piece.

[0012] Optionally, the skeleton includes a skeleton body, a first annular plate, and a second annular plate. The first annular plate and the second annular plate are both mounted on the skeleton body and are respectively disposed near both ends of the skeleton body. The first annular plate, the second annular plate, the skeleton body, and the insulating layer enclose to form the winding groove.

[0013] Optionally, the pole piece includes a first pole plate and a second pole plate. The first pole plate is fixed to a side of the first annular plate facing away from the second annular plate, and the second pole plate is fixed to a side of the second annular plate facing away from the first annular plate.

[0014] Optionally, the electronic expansion valve further includes a fixing member. The fixing member includes a fixing plate and a connecting plate connected to the fixing plate. The fixing plate is fixed to the pole piece, and the connecting plate is connected to the valve body.

[0015] Optionally, the connecting plate is provided with a connecting hole, and the valve body is provided with a connecting protrusion. The connecting protrusion is snapped into the connecting hole.

[0016] Optionally, the protective cover is mounted on the upper end surface of the valve body.

[0017] The present invention also provides a refrigeration device including the electronic expansion valve as described above.

[0018] The electronic expansion valve in the technical solution of the present invention includes a protective cover, a valve body, a stator assembly, and an insulating wire protection part. The valve body is mounted on the protective cover. The stator assembly includes a metal shell, a skeleton, and a winding. The skeleton is provided with a winding groove, and the winding is wound around the skeleton and is located in the winding groove. The metal shell is connected to the protective cover and is located at the opening of the winding groove, so that an insulating gap is formed between the metal shell and the winding. The insulating wire protection part is used for the insertion of a wire component, and then the coil is placed in an injection mold, and then poured into the mold, so that the glue automatically flows into the insulating gap to form an insulating layer, and the protective cover and the insulating wire protection part are formed, so that the insulating wire protection part, the insulating layer, and the protective cover are integrally injection-molded, which greatly simplifies the production and processing process of the electronic expansion valve, eliminates the need for the installation of each component, thereby shortening the production cycle of the electronic expansion valve and reducing the production cost of the electronic expansion valve. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0020] Figure 1 Cross-sectional view of an embodiment of the electronic expansion valve of the present invention;

[0021] Figure 2 is Figure 1 Schematic structural diagram after the protective cover, insulating layer and insulating wire protection part in [Figure] are integrally formed;

[0022] Figure 3 is Figure 1 Schematic structural diagram of the metal shell in [Figure];

[0023] Figure 4 is Figure 1 Cross-sectional view of the skeleton and pole piece in [Figure];

[0024] Figure 5 is Figure 1 Schematic structural diagram of the first pole plate in [Figure];

[0025] Figure 6 is Figure 1 Schematic structural diagram of the second pole plate in [Figure];

[0026] Figure 7 is Figure 1 Schematic structural diagram of the fixing part in [Figure].

[0027] Explanation of the reference numerals in the drawings:

[0028] Label Name Label Name 11 Protective cover 34 First electrode plate 12 Insulating layer 35 Second electrode plate 13 Insulating wire protection part 41 Pin 20 Valve body 42 Circuit board 31 Metal shell 43 Wire 32 Skeleton 44 Leather sheath 321 First annular plate 50 Fixing part 322 Second annular plate 51 Fixing plate 323 Wire groove 52 Connecting plate 33 Winding

[0029] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0032] In the present invention, unless otherwise clearly specified or limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, in the present invention, the descriptions involving "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, "and / or" throughout the text includes three scenarios. Taking A and / or B as an example, it includes the technical solution of A, the technical solution of B, and the technical solution that both A and B are satisfied at the same time. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] Referring to Figures 1 to 3 , the present invention provides an electronic expansion valve, comprising

[0035] a valve body 20;

[0036] a coil, the coil comprising a protective cover 11 and a stator assembly. The valve body 20 is installed on the protective cover 11. The stator assembly includes a metal shell 31, a skeleton 32, and a winding 33. A winding groove 323 is provided on the skeleton 32. The winding 33 is wound around the skeleton 32 and is located in the winding groove 323. The metal shell 31 is connected to the protective cover 11 and is located at the opening of the winding groove 323, so that an insulating gap is formed between the metal shell 31 and the winding 33, and an insulating layer 12 is filled in the insulating gap; and

[0037] an insulating wire protection part 13, the insulating wire protection part 13 is used for the insertion of a wire component, and the insulating wire protection part 13, the insulating layer 12, and the protective cover 11 are integrally injection molded.

[0038] The electronic expansion valve in the technical solution of the present invention includes a protective cover 11, a valve body 20, a stator assembly, and an insulating wire protection part 13. The valve body 20 is installed in the protective cover 11. The stator assembly includes a metal shell 31, a skeleton 32, and a winding 33. A winding groove 323 is provided on the skeleton 32. The winding 33 is wound around the skeleton 32 and is located in the winding groove 323. The metal shell 31 is connected to the protective cover 11 and is located at the opening of the winding groove 323, so that an insulating gap is formed between the metal shell 31 and the winding 33. The insulating wire protection part 13 is used for the insertion of wire components. Then, the coil is placed in an injection mold, and then the mold is poured, so that the glue automatically flows into the insulating gap to form an insulating layer 12, and the protective cover 11 and the insulating wire protection part 13 are formed. Thus, the insulating wire protection part 13, the insulating layer 12, and the protective cover 11 are integrally injection-molded, which greatly simplifies the production and processing process of the electronic expansion valve, eliminates the need for the installation of each component, shortens the production cycle of the electronic expansion valve, reduces the production cost of the electronic expansion valve, and the integrally injection-molded insulating wire protection part 13, insulating layer 12, and protective cover 11 have higher structural strength, stable performance, and better waterproof and sealing effects, thereby further improving the waterproof effect and the qualified rate of the electronic expansion valve.

[0039] Further, when the winding 33 is energized, most of it will generate magnetic force, but a part of it will cause heat generation in the winding 33. If the heat is too high, it will cause the winding 33 to expand, and then the winding 33 will deform. Therefore, by providing the metal shell 31, when the winding 33 is heated, under the limiting action of the metal shell 31, the winding 33 will not expand and deform, thus ensuring the normal operation of the winding 33 and improving the service life of the winding 33 and the electronic expansion valve. And by pouring the insulating layer 12 between the winding 33 and the metal shell 31, the deformable space of the winding 33 is smaller, and the injection-molded insulating layer 12 and the metal shell 31 jointly support the winding 33, further reducing the possibility of the winding 33 expanding and deforming due to heat, and further improving the service life of the electronic expansion valve.

[0040] In this embodiment, the wire component includes a pin 41, a circuit board 42, a wire 43, and a leather sleeve 44. The leather sleeve 44 is sleeved on the wire 43. The pin 41 is electrically connected to the circuit board 42, the wire 43 is electrically connected to the circuit board 42, and the circuit board 42, the pin 41, and a part of the leather sleeve 44 are wrapped in the insulating wire protection part 13. Through the insulating wire protection part 13, the pin 41, the circuit board 42, and the wire 43 are protected, thus ensuring the electrical safety of the internal electrical components of the electronic expansion valve and improving the service life of the electronic expansion valve.

[0041] Before integrally injection-molding the insulating wire protection part 13, the insulating layer 12, and the protective cover 11, it is necessary to first weld the pin 41 to the circuit board 42 and weld the wire 43 to the circuit board 42. Therefore, in this embodiment, the insulating wire protection part 13 extends along the radial direction of the winding 33. This enables the wire 43 to be directly welded to the circuit board 42 without bending, facilitating the welding of the electronic expansion valve, improving the processing efficiency of the electronic expansion valve, and shortening the production cycle of the electronic expansion valve.

[0042] In this embodiment, the electronic expansion valve further includes pole pieces, the pole pieces are installed on the bobbin 32, and the metal shell 31 is electrically connected to the pole pieces. The metal shell 31 and the pole pieces are insulated from the winding 33 through the insulating layer 12, so as to ensure the electrical insulation between the winding 33 and the metal shell 31 and the pole pieces, improving the electrical insulation effect of the electronic expansion valve, and further enhancing the safety and reliability of the electronic expansion valve.

[0043] Refer to Figures 4 to 6 , specifically, the bobbin 32 includes a bobbin body, a first annular plate 321, and a second annular plate 322. The first annular plate 321 and the second annular plate 322 are both installed on the bobbin body and are respectively disposed near both ends of the bobbin body. The first annular plate 321, the second annular plate 322, the bobbin body, and the insulating layer 12 enclose to form the winding groove 323. The first annular plate 321 and the second annular plate 322 play a role in limiting the winding 33, facilitating the winding of the coil. At the same time, the first annular plate 321 and the second annular plate 322 also play a role in isolating the winding 33 and the pole pieces, further improving the electrical insulation effect of the electronic expansion valve.

[0044] Furthermore, the pole pieces include a first pole plate 34 and a second pole plate 35. The first pole plate 34 is fixed to the side of the first annular plate 321 facing away from the second annular plate 322, and the second pole plate 35 is fixed to the side of the second annular plate 322 facing away from the first annular plate 321. The connection between the first pole plate 34 and the first annular plate 321, and the connection between the second pole plate 35 and the second annular plate 322 can be in ways such as fitting welding, riveting, or bolt connection. These connection methods have stable and reliable performance, mature processes, and low processing costs. And the fitting method reduces the installation gap between the first pole plate 34 and the first annular plate 321, reduces the noise generated during the operation of the electronic expansion valve, and further improves the service life of the electronic expansion valve and the user experience. There are two valve seats, and the two valve seats are stacked.

[0045] Specifically, a plurality of stator teeth are provided on one side of the first pole plate 34 and the second pole plate 35 facing each other, and the plurality of stator teeth on the first pole plate 34 and the plurality of stator teeth on the second pole plate 35 are alternately distributed along the circumferential direction of the first pole plate 34. By alternately distributing the plurality of stator teeth on the first pole plate 34 and the second pole plate 35 along the circumferential direction of the first pole plate 34, when the first pole plate 34 and the second pole plate 35 are installed together, one stator tooth among the plurality of stator teeth on the second pole plate 35 is placed between two adjacent stator teeth among the plurality of stator teeth on the first pole plate 34, and one stator tooth among the plurality of stator teeth on the first pole plate 34 is placed between two adjacent stator teeth among the plurality of stator teeth on the second pole plate 35, which can not only increase the magnetic flux of the first pole plate 34 and the second pole plate 35, but also improve the stability of the first pole plate 34 and the second pole plate 35 through the mutual limitation of the alternately arranged plurality of stator teeth.

[0046] Referring to Figure 1 and Figure 7 , in this embodiment, the electronic expansion valve further includes a fixing member 50, and the fixing member 50 includes a fixing plate 51 and a connecting plate 52 connected to the fixing plate 51. The fixing plate 51 is fixed to the pole piece, and the connecting plate 52 is connected to the valve body 20. By providing the fixing member 50, the connection strength between the skeleton 32 and the valve body 20 is further increased. At the same time, the fixing member 50 can also play a role in grounding the electronic expansion valve, thereby further improving the safety and reliability of the electronic expansion valve.

[0047] Furthermore, the fixing plate 51 is riveted to fit the pole piece, thereby reducing the installation gap between the fixing plate 51 and the pole piece, further reducing the noise generated during the operation of the electronic expansion valve, and improving the user experience. At the same time, the riveting process is mature and stable, with reliable performance, high connection strength, and low cost. Of course, in other embodiments, the fixing plate 51 and the pole piece can also be welded, bolted, etc.

[0048] Furthermore, a connection hole is provided on the connecting plate 52, and a connection protrusion is provided on the valve body 20, and the connection protrusion is snapped into the connection hole. The connecting plate 52 is arranged in a V shape and has a certain elasticity, so that one end of the connecting plate 52 close to the valve body 20 can firmly abut against the outer peripheral surface of the valve body 20 under the action of elasticity, and then further through the limiting action of the connection protrusion and the connection hole, the connection strength between the connecting plate 52 and the valve body 20 is increased.

[0049] Optionally, the protective cover 11 is installed on the upper end face of the valve body 20. By providing the protective cover 11, the waterproof effect of the electronic expansion valve is increased, the entry of external impurities or sewage into the electronic expansion valve is reduced, thereby improving the waterproof effect and safety of the electronic expansion valve, and further improving the service life of the electronic expansion valve. At the same time, the protective cover 11 is integrally injection-molded on the valve body 20, so that not only is the connection strength between the valve body 20 and the protective cover 11 relatively high, but also the integral injection molding results in a good waterproof effect between the valve body 20 and the protective cover 11, thereby reducing the possibility of water entering the electronic expansion valve through the installation gap between the valve body 20 and the protective cover 11, and further improving the waterproof effect and service life of the electronic expansion valve.

[0050] The present invention also provides a refrigeration device. Among them, refrigeration devices can be divided into compression refrigeration devices, absorption refrigeration devices, steam jet refrigeration devices, heat pump refrigeration devices, electrothermal refrigeration devices, etc. The refrigeration device mainly includes a motor, a compressor, an electronic expansion valve, an evaporator, a condenser, and accessories and pipelines. Such as refrigerators, air conditioners, etc. The specific structure of the electronic expansion valve refers to the above-mentioned embodiments. Since the refrigeration device in the present invention adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated here one by one.

[0051] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or any 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, characterized in that, including a valve body; a coil, the coil including a protective cover and a stator assembly, the valve body being mounted on the protective cover, the stator assembly including a metal shell, a skeleton, and a winding, the skeleton being provided with a winding groove, the winding being wound around the skeleton and located within the winding groove, the metal shell being connected to the protective cover and located at an opening of the winding groove so that an insulating gap is formed between the metal shell and the winding, and an insulating layer being filled within the insulating gap; and an insulating wire protection part for allowing a wire component to penetrate therethrough, and the insulating wire protection part, the insulating layer, and the protective cover being integrally injection molded.

2. The electronic expansion valve according to claim 1, wherein The insulating wire protection part extends in a radial direction of the winding.

3. The electronic expansion valve according to claim 1, characterized in that The wire component includes a pin, a circuit board, a wire, and a sheath, the sheath being sleeved on the wire, the pin being electrically connected to the circuit board, the wire being electrically connected to the circuit board, and the circuit board, the pin, and a part of the sheath being wrapped within the insulating wire protection part.

4. The electronic expansion valve according to claim 1, wherein The electronic expansion valve further includes a pole piece, the pole piece being mounted on the skeleton, and the metal shell being electrically connected to the pole piece.

5. The electronic expansion valve according to claim 4, wherein, The skeleton includes a skeleton body, a first annular plate, and a second annular plate, the first annular plate and the second annular plate both being mounted on the skeleton body and respectively disposed near two ends of the skeleton body, and the first annular plate, the second annular plate, the skeleton body, and the insulating layer enclose to form the winding groove.

6. The electronic expansion valve according to claim 5, wherein, The pole piece includes a first pole plate and a second pole plate, the first pole plate being fixed on a side of the first annular plate facing away from the second annular plate, and the second pole plate being fixed on a side of the second annular plate facing away from the first annular plate.

7. The electronic expansion valve according to claim 4, wherein The electronic expansion valve further includes a fixing member, the fixing member including a fixing plate and a connecting plate connected to the fixing plate, the fixing plate being fixed to the pole piece, and the connecting plate being connected to the valve body.

8. The electronic expansion valve according to claim 7, characterized in that, The connecting plate is provided with a connecting hole, and the valve body is provided with a connecting protrusion, and the connecting protrusion is snapped into the connecting hole.

9. The electronic expansion valve according to claim 1, characterized in that, The protective cover is mounted on an upper end surface of the valve body.

10. A refrigeration device, characterized in that, including the electronic expansion valve according to any one of claims 1 to 9.

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