Pilot structure and reversing valve

Abstract

The utility model provides a pilot structure and a reversing valve, and relates to the technical field of control valves. The pilot structure comprises a pilot valve pipe, a pilot valve seat and a plurality of first capillary tubes, wherein the pilot valve pipe is provided with a plurality of mounting holes arranged at intervals; the pilot valve seat is arranged in the pilot valve pipe; in the radial direction of the pilot valve pipe, the multiple first capillary pipes correspondingly penetrate through the multiple mounting holes and are connected to the pilot valve seat. The mounting holes correspond to the first capillary tubes and are used for mounting the first capillary tubes, gaps between the first capillary tubes and the mounting holes of the pilot valve tube are small or no gaps exist, solder penetration is good, and the fixing effect of the first capillary tubes is good. Compared with the prior art that a plurality of first capillary tubes are inserted into a shared through hole, the plurality of mounting holes are independently arranged, and the plurality of mounting holes and the plurality of first capillary tubes are correspondingly arranged and matched with each other, so that the production and processing are convenient, and the fixation and stabilization of the plurality of first capillary tubes are facilitated.

Description

Technical Field

[0001] The utility model generally relates to the technical field of control valves. Specifically, it relates to a pilot structure and a reversing valve. Background Art

[0002] In the related art, the pilot valve includes a valve tube, a pilot valve seat, and a plurality of capillary tubes. The pilot valve seat is arranged inside the valve tube. A through hole is arranged on the valve tube. The shape of the through hole can be circular, square, or heart-shaped. The capillary tubes pass through the through hole and are connected to the pilot valve seat. Since one through hole is a large-hole structure with a relatively large size, and a plurality of capillary tubes share one through hole, the gap between the capillary tubes and the valve tube is relatively large, which affects the fixing effect of the capillary tubes. At the same time, the through hole with a heart-shaped structure is a special-shaped hole, which is not conducive to production and processing, increases the processing difficulty, and the production cost is relatively high. Summary of the Utility Model

[0003] A pilot structure and a reversing valve provided by the utility model improve the fixing effect and reduce the production cost.

[0004] According to the first aspect of the utility model, a pilot structure is provided, including:

[0005] A pilot valve tube, the pilot valve tube is provided with a plurality of installation holes arranged at intervals:

[0006] A pilot valve seat, arranged inside the pilot valve tube;

[0007] A plurality of first capillary tubes, along the radial direction of the pilot valve tube, the plurality of first capillary tubes correspondingly pass through the plurality of installation holes and are connected to the pilot valve seat.

[0008] In some embodiments, the projections of the plurality of first capillary tubes on a first reference plane are arranged in a triangular pattern;

[0009] Wherein, the first reference plane is perpendicular to the plurality of first capillary tubes, and the first reference plane is parallel to the axial direction of the pilot valve tube.

[0010] In some embodiments, the pilot structure further includes:

[0011] A bracket, the bracket is used to carry the pilot valve tube, and the projection of the bracket on the first reference plane does not coincide with the projection of the plurality of first capillary tubes on the first reference plane;

[0012] Wherein, the first reference plane is perpendicular to the plurality of first capillary tubes, and the first reference plane is parallel to the axial direction of the pilot valve tube.

[0013] In some embodiments, the projections of the plurality of first capillary tubes on a second reference plane at least partially coincide;

[0014] Wherein, the second reference plane is arranged parallel to the plurality of first capillary tubes, and the second reference plane is arranged parallel to the axial direction of the pilot valve tube.

[0015] In some embodiments, the pilot valve tube is provided with an extension portion, the extension portion is arranged on at least one side of the mounting hole along the radial direction of the pilot valve tube, and at least a part of the outer wall of the first capillary tube is attached to the extension portion.

[0016] In some embodiments, the extension portion and the first capillary tube are welded:

[0017] And / or, the mounting hole and the first capillary tube are welded.

[0018] In some embodiments, along the radial direction of the pilot valve tube, a plurality of connection holes are arranged on one side of the pilot valve seat close to the first capillary tube, the plurality of connection holes are arranged corresponding to and communicated with the plurality of mounting holes, and the plurality of first capillary tubes correspondingly penetrate through the plurality of connection holes;

[0019] And / or, along the radial direction of the pilot valve tube, a plurality of communication holes are arranged on one side of the pilot valve seat away from the first capillary tube, and the plurality of first capillary tubes are correspondingly communicated with the plurality of communication holes.

[0020] In some embodiments, the pilot structure further includes:

[0021] A second capillary tube, which penetrates through the pilot valve tube along the axial direction of the pilot valve tube and is communicated with the pilot valve tube;

[0022] A filter screen, which is arranged in the pilot valve tube and corresponds to the second capillary tube.

[0023] In some embodiments, the diameter of the filter screen is larger than the diameter of the second capillary tube;

[0024] And / or, the filter screen protrudes towards the direction close to the second capillary tube, or, the filter screen is recessed towards the direction away from the second capillary tube.

[0025] In some embodiments, the pilot structure further includes:

[0026] A cover plate, which is arranged at one end of the pilot valve tube along the axial direction of the pilot valve tube, the cover plate is provided with a protruding portion along the axial direction of the pilot valve seat, and the second capillary tube penetrates through the protruding portion.

[0027] According to the second aspect of the present invention, a reversing valve is provided, which includes the above-mentioned pilot structure.

[0028] One embodiment of the present utility model has the following advantages or beneficial effects:

[0029] For the pilot structure and the reversing valve provided by the embodiment of the present utility model, a plurality of mounting holes are arranged at intervals in the pilot valve pipe. The plurality of mounting holes are correspondingly arranged with a plurality of first capillary tubes. The mounting holes are used for the penetration and installation of the first capillary tubes. The gap between the first capillary tubes and the mounting holes of the pilot valve pipe is small or there is no gap, the solder penetration is good, and the fixing effect of the first capillary tubes is good. Compared with inserting a plurality of first capillary tubes into a common heart-shaped through hole in the related art, the plurality of mounting holes are independently arranged, the plurality of mounting holes are correspondingly arranged with the plurality of first capillary tubes and are mutually matched, which is convenient for production and processing, and is beneficial to the fixing and stability of the plurality of first capillary tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to better understand the present utility model, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of the present utility model. In addition, related elements or components may have different arrangements as known in the art. Further, in the drawings, the same reference numerals denote the same or similar components in each drawing. By referring to the drawings and describing in detail its exemplary embodiments, the above and other features and advantages of the present utility model will become more apparent.

[0031] Wherein:

[0032] Figure 1 The structure diagram of the pilot structure of an embodiment of the present utility model is shown;

[0033] Figure 2 The sectional view of the pilot structure of an embodiment of the present utility model is shown;

[0034] Figure 3 Shown is Figure 2 The partial enlarged view at A;

[0035] Figure 4 The schematic diagram showing the mounting holes of the pilot structure of an embodiment of the present utility model is shown.

[0036] Wherein, the reference numeral descriptions are as follows:

[0037] 1. Pilot valve pipe; 2. Pilot valve seat; 3. First capillary tube; 4. Bracket; 5. Second capillary tube; 6. Filter screen; 7. Cover plate;

[0038] 11. Mounting hole;

[0039] 21. Connection hole; 22. Communication hole;

[0040] 71. Protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The technical solutions in the exemplary embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present utility model. The exemplary embodiments described herein are only for the purpose of illustration and are not intended to limit the protection scope of the present utility model. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the protection scope of the present utility model.

[0042] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; the term "plurality" means two or more; the term "and / or" includes any combination and all combinations of one or more of the associated listed items. In particular, referring to "the / this" object or "one" object also intends to represent one of the possible multiple such objects.

[0043] Unless otherwise specified or described, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] Furthermore, in the description of the present utility model, it should be understood that the orientation terms such as "upper", "lower", "inner", "outer", etc. described in the exemplary embodiments of the present utility model are described from the angles shown in the accompanying drawings and should not be understood as limiting the exemplary embodiments of the present utility model. It should also be understood that in the context, when referring to an element or feature being connected "above", "below", or "inside", "outside" another element (one or more), it can not only be directly connected "above", "below", or "inside", "outside" another (one or more) element, but also be indirectly connected "above", "below", or "inside", "outside" another (one or more) element through an intermediate element.

[0045] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this utility model will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed description will be omitted.

[0046] This embodiment provides a pilot structure, such as Figures 1 - 3As shown in the figure, the pilot structure includes a pilot valve tube 1, a pilot valve seat 2, and a plurality of first capillary tubes 3. The pilot valve tube 1 is provided with a plurality of mounting holes 11 arranged at intervals. The pilot valve seat 2 is arranged inside the pilot valve tube 1. Along the radial direction of the pilot valve tube 1, the plurality of first capillary tubes 3 are correspondingly inserted through the plurality of mounting holes 11 and connected to the pilot valve seat 2.

[0047] Among them, the pilot valve tube 1 is made of stainless steel, having the advantages of good structural strength and strong corrosion resistance. The outer shape of the pilot valve tube 1 is a cylindrical structure. The pilot valve tube 1 is a hollow structure. The cavity of the pilot valve tube 1 provides a receiving space for the pilot valve seat 2, other components, and the medium. The medium can be, for example, refrigerant. The mounting holes 11 of the pilot valve tube 1 are used to mount the first capillary tubes 3. The mounting holes 11 can also be called welding holes. The mounting holes 11 and the first capillary tubes 3 are welded. That is, after the first capillary tubes 3 are inserted into the mounting holes 11, welding is performed to fix the first capillary tubes 3 in the mounting holes 11. Specifically, for example, a welding torch is used to weld the outer wall of the first capillary tube 3 and the inner wall of the mounting hole 11.

[0048] Among them, the axial direction of the pilot valve tube 1 is defined as the first direction, which is marked by D1. The radial direction of the pilot valve tube 1 is the second direction, which is marked by D2. The third direction is marked by D3. The first direction, the second direction, and the third direction are perpendicular to each other pairwise. The first direction, the second direction, and the third direction only represent spatial directions and have no substantial meaning.

[0049] Among them, the first capillary tubes 3 are arranged along the radial direction of the pilot valve tube 1. The first capillary tubes 3 can also be called radial capillary tubes, that is, the first capillary tubes 3 extend along the second direction. The types and sizes of the plurality of first capillary tubes 3 can be the same or different. For example, the number of the first capillary tubes 3 is three. Two of the first capillary tubes 3 are E capillary tubes and C capillary tubes respectively, and the other first capillary tube 3 is an S capillary tube.

[0050] Among them, the pilot valve seat 2 is arranged inside the pilot valve tube 1. The pilot valve seat 2 is used to support and fix the first capillary tubes 3. The pilot valve seat 2 can be connected to the inner wall of the pilot valve tube 1 by welding, with simple process and low production and processing difficulty. The pilot valve seat 2 can also be an integrally formed structure with the pilot valve tube 1, reducing the part assembly link and having low production cost.

[0051] The pilot structure provided in this embodiment is provided with a plurality of mounting holes 11 arranged at intervals through the pilot valve tube 1. The plurality of mounting holes 11 are arranged corresponding to the plurality of first capillary tubes 3. The mounting holes 11 are used for the penetration and installation of the first capillary tubes 3. The gap between the first capillary tubes 3 and the mounting holes 11 of the pilot valve tube 1 is small or there is no gap, the solder penetration is good, and the fixing effect of the first capillary tubes 3 is good. Compared with the existing situation where a plurality of first capillary tubes 3 are inserted into a common heart-shaped through hole, the plurality of mounting holes 11 are independently arranged, the plurality of mounting holes 11 are arranged corresponding to the plurality of first capillary tubes 3 and are mutually matched, which is convenient for production and processing, and is beneficial to the fixing and stability of the plurality of first capillary tubes 3.

[0052] In one embodiment, the pilot valve tube 1 is provided with an extension part (not shown in the figure). The extension part is arranged on at least one side of the mounting hole 11 along the radial direction of the pilot valve tube 1, and at least a part of the outer wall of the first capillary tube 3 is attached to the extension part.

[0053] After the first capillary tube 3 is inserted into the mounting hole 11, the extension part can support the first capillary tube 3, improve the support reliability of the first capillary tube 3, and the mutual cooperation between the extension part and the mounting hole 11 is beneficial to the positioning of the first capillary tube 3, improve the relative position accuracy between the pilot valve tube 1 and the first capillary tube 3, and further improve the welding quality and accuracy. At the same time, the extension part is used to increase the contact area between the first capillary tube 3 and the pilot valve tube 1, improve the fixing stability of the first capillary tube 3, and thus fix the first capillary tube 3 more reliably on the pilot valve tube 1.

[0054] Exemplarily, the extension part can be arranged inside or outside the pilot valve tube 1. When the extension part is arranged inside the pilot valve tube 1, the extension part is located on the side of the mounting hole 11 along the second direction and away from the first capillary tube 3, that is, the extension part is located inside the mounting hole 11. The part of the first capillary tube 3 passing through the mounting hole 11 contacts the extension part, increasing the contact area between this part of the first capillary tube 3 and the pilot valve tube 1, and improving the fixing stability and support reliability of the first capillary tube 3; when the extension part is arranged outside the pilot valve tube 1, the extension part is located on the side of the mounting hole 11 along the second direction and close to the first capillary tube 3, that is, the extension part is located outside the mounting hole 11. The part of the first capillary tube 3 before passing through the mounting hole 11 contacts the extension part, increasing the contact area between this part of the first capillary tube 3 and the pilot valve tube 1, and improving the fixing stability and support reliability of the first capillary tube 3.

[0055] Exemplarily, the extension part can specifically be an inward flange or an outward flange of the mounting hole 11. When processing the mounting hole 11, the extension part can be formed, reducing the process difficulty and lowering the production cost.

[0056] Specifically, the extension part is welded to the first capillary tube 3. After the first capillary tube 3 is inserted into the mounting hole 11, the outer wall of the first capillary tube 3 is welded to the inner wall of the mounting hole 11 and the extension part respectively by a welding torch, increasing the fixed connection range of the first capillary tube 3 and improving the fixing effect. At the same time, by using the extension part, the penetration depth during the welding of the first capillary tube 3 can be increased, ensuring the welding quality.

[0057] If multiple first capillary tubes 3 are arranged in a straight line along the axial direction of the pilot valve tube 1, the distance between the two outermost first capillary tubes 3 is relatively large, resulting in a relatively large flow path of the medium in the pilot valve tube 1 and affecting the response speed of the pilot structure.

[0058] To solve this problem, as Figures 1 - 4 shown, the projections of multiple first capillary tubes 3 on the first reference plane are arranged in a triangle; wherein, the first reference plane is perpendicular to the first capillary tube 3, the first reference plane is parallel to the axial direction of the pilot valve tube 1, and the first reference plane is specifically the plane where the first direction and the third direction are located.

[0059] In this way, multiple first capillary tubes 3 are arranged in a triangle. By utilizing the stable advantage of the triangle structure, the pilot valve tube 1 has a good supporting and stabilizing effect on multiple first capillary tubes 3. At the same time, it is equivalent to concentrating the two outermost first capillary tubes 3 towards the middle, and the distance between any two of the multiple first capillary tubes 3 is relatively small, making the flow path of the medium in the pilot valve tube 1 relatively small, improving the response speed of the pilot structure and thus improving the sensitivity of the pilot structure.

[0060] In one embodiment, the projections of multiple first capillary tubes 3 on the second reference plane at least partially overlap; wherein, the second reference plane is parallel to the first capillary tube 3, the second reference plane is parallel to the axial direction of the pilot valve tube 1, and the second reference plane is specifically the plane where the first direction and the second direction are located.

[0061] In this way, the projections of multiple first capillary tubes 3 on the second reference plane at least partially overlap, causing multiple first capillary tubes 3 to further concentrate towards the center of the triangle. The triangle size of the arrangement of multiple first capillary tubes 3 in a triangle is relatively small, further shortening the flow path of the medium and further improving the response sensitivity of the pilot structure.

[0062] In one embodiment, as Figures 1 - 3As shown, the pilot structure further includes a bracket 4 for carrying the pilot valve tube 1. Specifically, the bracket 4 includes a carrying portion and two supporting portions. The carrying portion is used to carry the pilot valve tube 1, and the carrying portion is an arc-shaped structure. The inner wall of the carrying portion is adapted to the outer wall of the pilot valve tube 1, with good supporting effect and good supporting stability. The two supporting portions are arranged at both ends of the carrying portion along the first direction, or the two supporting portions are arranged at both ends of the carrying portion along the second direction. The carrying portion and the two supporting portions form a U-shaped structure. By using the height of the supporting portion in the third direction, the pilot valve tube 1 can have a certain height distance and can be in a suspended state.

[0063] Among them, the projection of the bracket 4 on the first reference plane does not coincide with the projection of the first capillary tube 3 on the first reference plane.

[0064] It can be understood that by providing a plurality of mounting holes 11 on the pilot valve tube 1, each mounting hole 11 is used to mount and fix a first capillary tube 3, so as to fix the plurality of first capillary tubes 3 at relative positions on the pilot valve tube 1, and there is no need to provide additional structures on the pilot valve tube 1 to fix the plurality of first capillary tubes 3. Specifically, since the plurality of first capillary tubes 3 are respectively installed in the plurality of mounting holes 11, and the plurality of mounting holes 11 are used to install the corresponding first capillary tubes 3, the relative mounting positions of the plurality of first capillary tubes 3 on the pilot valve tube 1 are defined. The carrying portion of the bracket 4 is arranged at the bottom of the pilot valve tube 1 along the third direction, and the carrying portion does not need to continue to extend along the second direction and cover the outer wall of the pilot valve tube 1 to realize the limit of the pilot valve tube 1. It is equivalent that the bracket 4 can intercept a part of the limiting portion, reducing the original material cost of the bracket 4, and reducing the installation difficulty of the bracket 4, as well as reducing the installation and maintenance costs.

[0065] In one embodiment, as Figures 2 - 3 shown, along the radial direction of the pilot valve tube 1, a plurality of connection holes 21 are provided on one side of the pilot valve seat 2 close to the first capillary tube 3. The plurality of connection holes 21 are correspondingly arranged and communicated with the plurality of mounting holes 11, and the plurality of first capillary tubes 3 correspondingly pass through the plurality of connection holes 21.

[0066] After the first capillary tube 3 is inserted into the mounting hole 11, the connection holes 21 can be used to fix the plurality of first capillary tubes 3 and the pilot valve seat 2. Since the plurality of connection holes 21 and the plurality of first capillary tubes 3 are correspondingly arranged, each first capillary tube 3 can have a corresponding connection hole 21 for fixation, and the shape of each mounting hole 11 is adapted to the outer contour of the corresponding first capillary tube 3. In this way, the plurality of first capillary tubes 3 are reliably installed and fixed at the corresponding positions on the pilot valve tube 1, and the fixation is reliable.

[0067] Among them, along the radial direction of the pilot valve tube 1, a plurality of communication holes 22 are provided on one side of the pilot valve seat 2 away from the first capillary tube 3. The plurality of first capillary tubes 3 are correspondingly communicated with the plurality of communication holes 22.

[0068] In this way, the medium in the pilot valve pipe 1 can be correspondingly transported into a plurality of first capillary tubes 3 through a plurality of communication holes 22. The communication holes 22 can serve as the flow channel transportation channels of the valve seat for the transportation of the medium. It can be understood that since the projections of the plurality of first capillary tubes 3 on the first reference plane are arranged in a triangular pattern, the projections of the plurality of communication holes 22 on the first reference plane are also arranged in a triangular pattern, making the distance between any two communication holes 22 relatively small, and the paths of the medium entering each communication hole 22 relatively close, shortening the flow path of the medium in the pilot valve pipe 1, thereby improving the response sensitivity and accuracy of the pilot structure.

[0069] In one embodiment, the pilot structure further includes a second capillary tube 5. The second capillary tube 5 is axially disposed through the pilot valve pipe 1 along the axial direction of the pilot valve pipe 1 and communicates with the pilot valve pipe 1. Among them, the second capillary tube 5 can also be called an axial capillary tube. The second capillary tube 5 is specifically an optional D capillary tube. The second capillary tube 5 plays a role in transporting the medium, and the medium is transported into the pilot valve pipe 1 through the second capillary tube 5.

[0070] In one embodiment, the pilot structure further includes a filter screen 6. The filter screen 6 is disposed in the pilot valve pipe 1 and is correspondingly arranged with the second capillary tube 5. The filter screen 6 can be used to filter impurities in the medium to ensure the cleanliness of the medium in the pilot valve pipe 1.

[0071] In one embodiment, the diameter of the filter screen 6 is larger than the diameter of the second capillary tube 5, so that the effective filtering area of the filter screen 6 is larger than the area of the second capillary tube 5, thereby reducing the risk of blockage.

[0072] Among them, the filter screen 6 protrudes towards the direction close to the second capillary tube 5, or the filter screen 6 is recessed away from the second capillary tube 5 to increase the contact area between the filter screen 6 and the medium, improve the filtering effect, further reduce the risk of blockage, and improve the service life and reliability of the pilot structure.

[0073] In one embodiment, the pilot structure further includes a cover plate 7, which is disposed at one end of the pilot valve pipe 1 along the axial direction of the pilot valve pipe 1. The cover plate 7 is provided with a protruding portion 71 along the axial direction of the pilot valve seat 2. The second capillary tube 5 passes through the protruding portion 71. Among them, the protruding portion 71 can be an inward or outward flange of the cover plate 7.

[0074] Among them, the cover plate 7 can be inserted into the pilot valve pipe 1 or can be covered on the pilot valve pipe 1. By providing the protruding portion 71 on the cover plate 7, the penetration depth during the welding of the second capillary tube 5 is increased, thus ensuring the welding quality; at the same time, the protruding portion 71 can also position the second capillary tube 5, enabling the second capillary tube 5 to better fit with the pilot valve pipe 1, thereby improving the relative position accuracy between the pilot valve pipe 1 and the second capillary tube 5, and further improving the welding quality and accuracy.

[0075] In one embodiment, a spool assembly (not shown in the figure) is provided inside the pilot valve tube 1. The spool assembly includes an electromagnetic coil, a core iron, a compression spring, a moving block, and a sliding block. The electromagnetic coil is disposed at one end of the pilot valve tube 1 away from the cover plate 7. The core iron is slidably disposed inside the pilot valve tube 1, and the compression spring is disposed between the core iron and the electromagnetic coil.

[0076] When the electromagnetic coil is energized, the electromagnetic coil generates a suction force on the core iron, causing the core iron to move towards the electromagnetic coil against the elastic force of the compression spring. When the electromagnetic coil is de-energized, the suction force of the electromagnetic coil on the core iron disappears, and the elastic force of the compression spring causes the core iron to move in a direction away from the electromagnetic coil. The moving block slides axially inside the pilot valve tube 1 and is connected to the core iron to move with the core iron.

[0077] The sliding block is connected to the moving block and abuts against the bottom surface of the pilot valve seat 2. A control groove is provided on the sliding block, and the control groove can cover two communication holes 22 in the axial direction of the pilot valve tube 1, so that the uncovered communication holes 22 can communicate with the second capillary tube. A pressing spring piece is fixedly connected to the moving block and abuts against one end of the sliding block away from the pilot valve seat 2 to prevent the sliding block from detaching from the pilot valve seat 2.

[0078] This embodiment also provides a reversing valve, including the above-mentioned pilot structure. The pilot valve tube 1 is provided with a plurality of spaced-apart mounting holes 11, and the plurality of mounting holes 11 are correspondingly arranged with a plurality of first capillary tubes 3. The mounting holes 11 are used for the penetration and installation of the first capillary tubes 3. The gap between the first capillary tubes 3 and the mounting holes 11 of the pilot valve tube 1 is small or there is no gap, and the fixing effect of the first capillary tubes 3 is good. Compared with the existing situation where a plurality of first capillary tubes 3 are inserted into a common heart-shaped through hole, the plurality of mounting holes 11 are independently arranged, and the plurality of mounting holes 11 are correspondingly arranged and matched with the plurality of first capillary tubes 3, which is convenient for production and processing and is beneficial to the fixing and stability of the plurality of first capillary tubes 3.

[0079] It should be noted here that what is shown in the drawings and described in this specification is only an example of applying the principle of the present invention. Those of ordinary skill in the art should clearly understand that the principle of the present invention is not limited to any details of the device shown in the drawings or described in the specification or any component.

[0080] It should be understood that the present utility model does not limit its application to the detailed structures and arrangements of the components presented in this specification. The present utility model can have other embodiments and can be implemented and carried out in various ways. The foregoing variations and modifications fall within the scope of the present utility model. It should be understood that the present utility model disclosed and defined in this specification extends to all alternative combinations of two or more separate features mentioned or apparent in the text and / or drawings. All such different combinations constitute multiple alternative aspects of the present utility model. The embodiments described in this specification illustrate the best mode known for implementing the present utility model and will enable those skilled in the art to utilize the present utility model.

[0081] After considering the specification and practicing the creation disclosed herein, those skilled in the art will readily conceive of other embodiments of the present utility model. The present utility model is intended to cover any variations, uses, or adaptations of the present utility model that follow the general principles of the present utility model and include known common general knowledge or conventional technical means in the technical field not disclosed in the present utility model. The specification and the example embodiments are only regarded as exemplary, and the true scope and spirit of the present utility model are pointed out by the appended claims.

[0082] It should be understood that the present utility model is not limited to the precise structures already described and shown in the drawings and can be subjected to various modifications and changes without departing from its scope. The protection scope of the present utility model is only limited by the appended claims.

Claims

1. A pilot structure, characterized in that: include: A pilot valve pipe (1), wherein the pilot valve pipe (1) is provided with a plurality of installation holes (11) arranged at intervals: A pilot valve seat (2) is arranged in the pilot valve pipe (1); A plurality of first capillary tubes (3) are arranged along the radial direction of the pilot valve tube (1), the plurality of first capillary tubes (3) correspondingly passing through the plurality of mounting holes (11) and connected to the pilot valve seat (2).

2. The pilot structure according to claim 1, characterized in that: The projections of the plurality of first capillaries (3) on the first reference plane are arranged in a triangular shape; The first reference plane is arranged perpendicularly to the plurality of first capillaries (3), and the first reference plane is arranged parallel to the axial direction of the guide valve tube (1).

3. The pilot structure according to claim 1, characterized in that: The pilot structure also includes: A bracket (4), the bracket (4) being used to support the guide valve tube (1), the projection of the bracket (4) on the first reference plane and the projection of the plurality of first capillaries (3) on the first reference plane not overlapping; The first reference plane is arranged perpendicularly to the plurality of first capillaries (3), and the first reference plane is arranged parallel to the axial direction of the guide valve tube (1).

4. The pilot structure according to claim 1, characterized in that: The projections of the plurality of first capillaries (3) on the second reference plane at least partially overlap; Wherein, the second reference plane is arranged in parallel with the plurality of first capillaries (3), and the second reference plane is arranged in parallel with the axial direction of the guide valve tube (1).

5. The pilot structure according to claim 1, characterized in that: The guide valve tube (1) is provided with an extension portion, the extension portion being arranged on at least one side of the mounting hole (11) along the radial direction of the guide valve tube (1), and at least part of the outer wall of the first capillary tube (3) is in contact with the extension portion.

6. The pilot structure according to claim 5, characterized in that: The extension portion and the first capillary (3) are welded: And / or, the mounting hole (11) and the first capillary (3) are welded.

7. The pilot structure according to claim 1, characterized in that: Along the radial direction of the pilot valve tube (1), a side of the pilot valve seat (2) close to the first capillary tube (3) is provided with a plurality of connection holes (21); the plurality of connection holes (21) are correspondingly arranged and communicated with the plurality of mounting holes (11); and the plurality of first capillary tubes (3) are correspondingly penetrated through the plurality of connection holes (21); And / or, along the radial direction of the pilot valve tube (1), a plurality of communication holes (22) are provided on a side of the pilot valve seat (2) away from the first capillary tube (3), and the plurality of first capillary tubes (3) are correspondingly connected to the plurality of communication holes (22).

8. The pilot structure according to any one of claims 1 to 7, characterized in that: The pilot structure also includes: A second capillary tube (5) is arranged in the guide valve tube (1) along the axial direction of the guide valve tube (1) and is in communication with the guide valve tube (1); A filter screen (6) is arranged in the guide valve tube (1) and corresponds to the second capillary tube (5).

9. The pilot structure according to claim 8, characterized in that: The diameter of the filter screen (6) is greater than the diameter of the second capillary tube (5); And / or, the filter screen (6) is arranged to protrude in a direction close to the second capillary (5), or the filter screen (6) is arranged to be recessed in a direction away from the second capillary (5).

10. The pilot structure according to claim 8, characterized in that: The pilot structure also includes: A cover plate (7) is arranged at one end of the pilot valve tube (1) along the axial direction of the pilot valve tube (1), the cover plate (7) is provided with a protrusion (71) along the axial direction of the pilot valve seat (2), and the second capillary tube (5) is passed through the protrusion (71).

11. A reversing valve, characterized in that: Comprising the leading structure according to any one of claims 1-10.

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