Pilot valve seat, pilot valve and reversing valve

Abstract

Provided in the present application are a pilot valve seat, a pilot valve and a reversing valve. The pilot valve seat comprises a valve seat body (100); the valve seat body (100) is provided with a plurality of pilot valve ports (101), which are used for connecting a capillary tube assembly; and the valve seat body (100) has an arc-shaped surface (102), the arc-shaped surface (102) being provided with an accommodating space arranged spaced apart from the pilot valve ports (101). When welded to a guide pipe (200) and the capillary tube assembly, the pilot valve seat is mounted in the guide pipe (200), the arc-shaped surface (102) of the valve seat body (100) is in contact with an inner wall of the guide pipe (200), and the capillary tube assembly is inserted into the corresponding pilot valve ports (101). Since the accommodating space is arranged spaced apart from the pilot valve ports (101), the installation of the capillary tube assembly is not affected; and solder is added to an outer surface of the guide pipe (200) and an outer surface of the capillary tube assembly for welding. During the welding process, the solder flows into the accommodating space of the valve seat body (100), such that the possibility of the solder flowing out of the range of the pilot valve seat to form overlapping is reduced, the hidden danger of flow welding is reduced, and it is ensured that the distance between a pipe opening of the guide pipe (200) and the pilot valve seat meets the requirement for positioning.

Description

Pilot valve seat, pilot valve and reversing valve

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority based on Chinese application No. 202321963902.6 filed on July 24, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of valve technology, and in particular to a pilot valve seat, a pilot valve, and a reversing valve. Background Art

[0004] In the related technology, the pilot valve includes a conduit, a pilot valve seat, a reed, a slider and an iron core. The pilot valve seat is fixed in the conduit by welding and is provided with multiple pilot valve ports for supplying refrigerant fluid. The capillary tube is welded to the pilot valve port. The slider is pressed against the pilot valve seat by the reed, and is driven by the iron core to slide relative to the pilot valve seat so that two adjacent pilot valve ports are connected through the slider.

[0005] During the welding process of the capillary, pilot valve seat and conduit, if too much solder is added or the welding temperature is too high, a weld nodule will be formed in the welding area of ​​the conduit and the pilot valve seat, causing the distance between the conduit orifice and the pilot valve seat to fail to meet the positioning requirements, thereby affecting the stroke of the moving iron core, causing the slider to be unable to cover the two pilot valve ports that need to be connected, and thus causing the pilot valve to fail.

[0006] Summary of the Invention

[0007] The technical problem to be solved by the present disclosure is how to provide a mounting bracket that can alleviate the eccentricity and jitter phenomena generated by the laser ranging sensor during rotation.

[0008] The purpose of the present disclosure is to provide a pilot valve seat, a pilot valve and a reversing valve to reduce the possibility of forming a weld nodule and ensure that the distance between the pipe mouth of the conduit and the pilot valve seat meets the positioning requirements.

[0009] Based on the above purpose, the present disclosure provides a pilot valve seat, including a valve seat body, which is provided with multiple pilot valve ports for connecting a capillary assembly; the valve seat body has an arcuate surface, the arcuate surface is provided with an accommodating space, and the accommodating space is spaced apart from the pilot valve port.

[0010] In one embodiment of the present disclosure, the valve seat body has a first end and a second end that are axially opposite to each other, and the accommodating space is located between the pilot valve port and the first end.

[0011] In one embodiment of the present disclosure, the accommodating space is a stepped recess, and the stepped recess passes through the end surface of the first end of the valve seat body.

[0012] In one embodiment of the present disclosure, the length of the step-shaped recess is A, 0.5mm≤A≤0.5L, and the depth of the step-shaped recess is H1, 0.2mm≤H1≤0.5H, wherein L is the minimum distance between the end face of the first end of the valve seat body and the edge of the pilot valve port, and H is the thickness of the valve seat body.

[0013] In one embodiment of the present disclosure, the accommodating space is a groove, and the groove extends along the circumferential direction of the arc-shaped surface.

[0014] In one embodiment of the present disclosure, the width of the groove is B, 0.5mm≤B≤(L1-0.5mm), and the depth of the groove is H2, 0.2mm≤H2≤0.5H, wherein L1 is the distance between the groove wall of the groove away from the first end and the end face of the first end, 1mm≤L1≤(0.5L-0.5mm), L is the minimum distance between the end face of the first end of the valve seat body and the edge of the pilot valve port, and H is the thickness of the valve seat body.

[0015] In one embodiment of the present disclosure, the projection of the groove bottom of the groove in the reference plane is in the shape of a straight line or a curve, wherein the reference plane passes through the axis of the valve seat body and intersects with the valve seat body.

[0016] In one embodiment of the present disclosure, a guiding slope is provided at a connection between the lower surface of the valve seat body and the first end of the valve seat body.

[0017] Based on the above-mentioned purpose, the present disclosure also provides a pilot valve, including a catheter, a capillary tube assembly and the pilot valve seat, the valve seat body is located inside the catheter, the capillary tube assembly is welded to the pilot valve port, the arcuate surface of the valve seat body is welded to the inner wall of the catheter, and the opening of the accommodating space faces the inner wall of the catheter.

[0018] Based on the above objectives, the present disclosure also provides a reversing valve, including the pilot valve.

[0019] The beneficial effects of the present disclosure are mainly:

[0020] The pilot valve seat provided by the present disclosure includes a valve seat body, the valve seat body being provided with a plurality of pilot valve ports for connecting a capillary assembly; the valve seat body having an arcuate surface, the arcuate surface being provided with a receiving space, the receiving space being spaced apart from the pilot valve ports. When welding the pilot valve seat with the catheter and the capillary assembly, the pilot valve seat is installed in the catheter, the arcuate surface of the valve seat body being in contact with the inner wall of the catheter, and the capillary assembly is inserted into the corresponding pilot valve port. Since the receiving space is spaced apart from the pilot valve port, the installation of the capillary assembly is not affected; solder is added to the outer surface of the catheter and the capillary assembly, and welding is performed. During the welding process, the solder will flow into the receiving space of the valve seat body, reducing the possibility of the solder flowing out of the range of the pilot valve seat and forming a weld nub, reducing the risk of flow welding, and ensuring that the distance between the catheter orifice and the pilot valve seat meets the positioning requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic structural diagram of a pilot valve seat provided in an embodiment of the present disclosure;

[0022] FIG2 is a schematic structural diagram of a pilot valve seat provided by an embodiment of the present disclosure from another perspective;

[0023] FIG3 is a left side view of the pilot valve seat provided in an embodiment of the present disclosure;

[0024] FIG4 is a front view of a pilot valve seat provided in an embodiment of the present disclosure;

[0025] FIG5 is another structural schematic diagram of a pilot valve seat provided in an embodiment of the present disclosure;

[0026] FIG6 is a schematic structural diagram of the pilot valve seat shown in FIG5 from another perspective;

[0027] FIG7 is a left side view of the pilot valve seat shown in FIG5 ;

[0028] FIG8 is a front view of the pilot valve seat shown in FIG5 ;

[0029] FIG9 is a schematic diagram of a third structure of a pilot valve seat provided in an embodiment of the present disclosure;

[0030] FIG10 is a schematic diagram of a partial structure of a pilot valve provided in an embodiment of the present disclosure;

[0031] FIG11 is a partial enlarged view of point I in FIG10 .

[0032] Among them, the figure numbers are explained as follows: 100-valve seat body; 11-first end; 12-second end; 101-pilot valve port; 102-arc surface; 103-lower surface; 1031-guide slope; 104a-step-shaped depression; 104b-groove; 1041b-groove wall; 1042b-groove bottom; 105-arc segment; 200-conduit; 301-E capillary; 302-S capillary; 303-C capillary; 304-D capillary. DETAILED DESCRIPTION

[0033] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0034] 1 to 11 , this embodiment provides a pilot valve seat, including a valve seat body 100 , wherein the valve seat body 100 is provided with a plurality of pilot valve ports 101 for connecting a capillary assembly; the valve seat body 100 has an arcuate surface 102 , and the arcuate surface 102 is provided with an accommodating space, which is spaced apart from the pilot valve port 101 .

[0035] When the pilot valve seat provided in this embodiment is welded to the conduit 200 and the capillary assembly, the pilot valve seat is installed in the conduit 200, the arcuate surface 102 of the valve seat body 100 contacts the inner wall of the conduit 200, and the capillary assembly is inserted into the corresponding pilot valve port 101. Since the accommodating space is spaced apart from the pilot valve port 101, the installation of the capillary assembly will not be affected; solder is added to the outer surfaces of the conduit 200 and the capillary assembly, and welding is performed. During the welding process, the solder will flow into the accommodating space of the valve seat body 100, reducing the possibility of the solder flowing out of the range of the pilot valve seat and forming a weld nodule, reducing the hidden dangers of flow welding, and ensuring that the distance between the pipe mouth of the conduit 200 and the pilot valve seat meets the positioning requirements.

[0036] In one embodiment, referring to Figures 1 and 2, the valve seat body 100 further has a lower surface 103, which is opposite to the arcuate surface 102. There are three pilot valve ports 101, which pass through the arcuate surface 102 and the lower surface 103 of the valve seat body 100. Exemplarily, the opening area of ​​the pilot valve port 101 on the arcuate surface 102 is larger than the opening area of ​​the pilot valve port 101 on the lower surface 103.

[0037] In one embodiment, the valve seat body 100 has a first end 11 and a second end 12 axially opposed to each other, with the accommodating space located between the pilot valve port and the first end 11. During installation, the second end 12 of the valve seat body 100 is aligned with the open end of the conduit 200 and inserted into the conduit 200. After installation, the first end 11 of the valve seat body 100 faces the open end of the conduit 200.

[0038] 10 , the capillary assembly includes an E capillary 301 , an S capillary 302 and a C capillary 303 . One end of the E capillary 301 , the S capillary 302 and the C capillary 303 are respectively inserted into the three pilot valve ports 101 for easy welding.

[0039] The capillary assembly further includes a D capillary 304, which is connected to the end of the conduit 200 near the second end 12 of the valve seat body 100. The slider, iron core and other components are installed into the conduit 200 from the end of the conduit 200 near the first end 11 of the valve seat body 100.

[0040] Because the accommodating space is located between the pilot valve port and the first end 11, during welding, solder near the first end 11 of the valve seat body preferentially flows into the accommodating space, reducing the possibility of solder flowing outside the pilot valve seat and forming weld nubs, reducing the risk of flow welding, and ensuring that the distance between the pipe port of the conduit 200 and the pilot valve seat meets the positioning requirements. Solder away from the first end 11 of the valve block body flows outside the valve block body, generally without affecting positioning accuracy.

[0041] In one possible design, the accommodating space is a stepped recess 104a. For example, as shown in FIG2 and FIG4 , the stepped recess 104a is recessed from the arcuate surface 102 toward the lower surface 103 and passes through the end surface of the first end 11 of the valve seat body 100.

[0042] In this possible design, as shown in Figures 3 and 4 , the length of the stepped recess 104a is A, 0.5 mm ≤ A ≤ 0.5 L, and the depth of the stepped recess 104a is H1, 0.2 mm ≤ H1 ≤ 0.5 H, where L is the minimum distance between the end surface of the first end 11 of the valve seat body 100 and the edge of the pilot valve port 101, and H is the thickness of the valve seat body 100. This ensures the structural strength of the valve seat body 100 while providing relatively ample space for excess solder, reducing the possibility of solder flowing outside the pilot valve seat and forming weld nubs, alleviating potential flow welding hazards, and ensuring that the distance between the orifice of the conduit 200 and the pilot valve seat meets positioning requirements.

[0043] It should be understood that the valve seat body 100 has an arcuate segment 105 near the first end 11, and the thickness H of the valve seat body 100 refers to the radial distance between the arcuate segment 105 and the arcuate surface 102. The minimum distance between the end surface of the first end 11 of the valve seat body 100 and the edge of the pilot valve port 101 refers to the minimum vertical distance between the end surface of the first end 11 of the valve seat body 100 and the edge of the pilot valve port 101 near the first end 11.

[0044] In this embodiment, the end surface of the arc segment 105 can limit the core iron of the pilot valve. At the same time, for the core iron with a step on the end surface, the avoidance space formed below the arc segment 105 can avoid the step of the core iron.

[0045] In another possible design, as shown in FIG. 5 , the accommodating space is a groove 104 b , and the groove 104 b extends along the circumferential direction of the arc-shaped surface 102 .

[0046] In this possible design, as shown in Figures 7 and 8 , the width of the groove 104b is B, 0.5 mm ≤ B ≤ (L1 - 0.5 mm), and the depth of the groove 104b is H2, 0.2 mm ≤ H2 ≤ 0.5H. L1 is the distance between the groove wall 1041b of the groove 104b distal from the first end 11 and the end surface of the first end 11, 1 mm ≤ L1 ≤ (0.5L - 0.5 mm), L is the minimum distance between the end surface of the first end 11 of the valve seat body 100 and the edge of the pilot valve port 101, and H is the thickness of the valve seat body 100. This ensures the structural strength of the valve seat body 100 while providing relatively ample space for excess solder, reducing the possibility of solder flowing out of the pilot valve seat and forming weld nubs, alleviating potential flow welding hazards, and ensuring that the distance between the orifice of the conduit 200 and the pilot valve seat meets positioning requirements.

[0047] It should be understood that, as shown in FIG. 6 and FIG. 7 , the valve seat body 100 has an arcuate segment 105 near the first end 11 , and the thickness H of the valve seat body 100 refers to the radial distance between the arcuate segment 105 and the arcuate surface 102 .

[0048] In this other possible design, the projection of the groove bottom 1042 b of the groove 104 b in the reference plane is in the shape of a straight line or a curve, wherein the reference plane passes through the axis of the valve seat body 100 and intersects the valve seat body 100 .

[0049] In some embodiments, specifically, as shown in FIG. 8 , the projection of the groove bottom 1042 b of the groove 104 b in the reference plane may be a straight line, which facilitates production and processing.

[0050] In other embodiments, the projection of the groove bottom 1042b of the groove 104b on the reference plane may also be in the shape of a curve. For example, as shown in FIG9 , the curve may be in the shape of an arc, with the arc curving away from the notch of the groove 104b. This configuration can increase the volume of the accommodation space to a certain extent, further reducing the possibility of solder flowing out of the pilot valve seat and forming a weld nub.

[0051] Of course, the shape of the curve can also be V-shaped or wavy.

[0052] In one embodiment, a guide slope 1031 is provided at the connection between the lower surface 103 of the valve seat body 100 and the first end 11 of the valve seat body 100. The provision of the guide slope 1031 facilitates the installation of the slider.

[0053] As shown in Figures 10 and 11, this embodiment also provides a pilot valve, including a conduit 200, a capillary assembly and a pilot valve seat provided in this embodiment, the valve seat body 100 is located inside the conduit 200, the capillary assembly is welded to the pilot valve port 101, the arcuate surface 102 of the valve seat body 100 is welded to the inner wall of the conduit 200, and the opening of the accommodating space faces the inner wall of the conduit 200.

[0054] The pilot valve provided in this embodiment uses the pilot valve seat provided in this embodiment. When welding the pilot valve seat with the conduit 200 and the capillary assembly, the pilot valve seat is installed in the conduit 200, and the arcuate surface 102 of the valve seat body 100 contacts the inner wall of the conduit 200. The capillary assembly is inserted into the corresponding pilot valve port 101. Since the accommodating space is spaced apart from the pilot valve port 101, the installation of the capillary assembly will not be affected. Solder is added to the outer surfaces of the conduit 200 and the capillary assembly for welding. During the welding process, the solder will flow into the accommodating space of the valve seat body 100, reducing the possibility of the solder flowing out of the range of the pilot valve seat and forming a weld nodule, reducing the hidden dangers of flow welding, and ensuring that the distance between the pipe mouth of the conduit 200 and the pilot valve seat meets the positioning requirements.

[0055] In one embodiment, the capillary assembly includes an E capillary 301, an S capillary 302, a C capillary 303 and a D capillary 304. One ends of the E capillary 301, the S capillary 302 and the C capillary 303 are respectively inserted into the three pilot valve ports 101 for welding. The D capillary 304 is connected to the end of the conduit 200 close to the second end 12 of the valve seat body 100.

[0056] It should be noted that the pilot valve also includes components such as a slider, an iron core, and an attractor. The slider and iron core are installed into the conduit 200 from the end of the conduit 200 near the first end 11 of the valve seat body 100. The slider is connected to the iron core via a bracket, and the attractor is fixedly connected to the conduit 200. The iron core can be attracted or disengaged from the attractor to drive the slider to slide relative to the valve seat body 100, thereby achieving communication between different capillaries. The operating principle of the pilot valve is conventional and will not be elaborated here.

[0057] This embodiment also provides a reversing valve, including the pilot valve provided in this embodiment.

[0058] The reversing valve provided in this embodiment uses the pilot valve provided in this embodiment, which can ensure that the distance between the pipe mouth of the conduit 200 and the pilot valve seat meets the positioning requirements, thereby ensuring that the pilot valve effectively controls the reversing valve to achieve flow path switching.

[0059] Illustratively, the reversing valve provided in this embodiment may be a four-way valve.

[0060] While the present disclosure has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present disclosure can be embodied in many forms without departing from the spirit or substance of the disclosure, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A pilot valve seat, characterized in that: It comprises a valve seat body, which is provided with a plurality of pilot valve ports for connecting a capillary assembly; the valve seat body has an arcuate surface, which is provided with a receiving space, and the receiving space is spaced apart from the pilot valve ports.

2. The pilot valve seat according to claim 1, characterized in that: The valve seat body has a first end and a second end that are axially opposite to each other, and the accommodating space is located between the pilot valve port and the first end.

3. The pilot valve seat according to claim 2, characterized in that: The accommodating space is a stepped depression, and the stepped depression passes through the end surface of the first end of the valve seat body.

4. The pilot valve seat according to claim 3, characterized in that: The length of the step-shaped depression is A, 0.5mm≤A≤0.5L, and the depth of the step-shaped depression is H1, 0.2mm≤H1≤0.5H, wherein L is the minimum distance between the end face of the first end of the valve seat body and the edge of the pilot valve port, and H is the thickness of the valve seat body.

5. The pilot valve seat according to claim 2, characterized in that: The accommodating space is a groove, and the groove extends along the circumferential direction of the arc surface.

6. The pilot valve seat according to claim 5, characterized in that: The width of the groove is B, 0.5mm≤B≤(L1-0.5mm), the depth of the groove is H2, 0.2mm≤H2≤0.5H, wherein L1 is the distance between the groove wall away from the first end and the end face of the first end of the groove, 1mm≤L1≤(0.5L-0.5mm), L is the minimum distance between the end face of the first end of the valve seat body and the edge of the pilot valve port, and H is the thickness of the valve seat body.

7. The pilot valve seat according to claim 5, characterized in that: The projection shape of the groove bottom of the groove in the reference plane is a straight line or a curve, wherein the reference plane passes through the axis of the valve seat body and intersects with the valve seat body.

8. The pilot valve seat according to any one of claims 1 to 7, characterized in that: A guiding slope is provided at a connection between the lower surface of the valve seat body and the first end of the valve seat body.

9. A pilot valve, characterized in that: It comprises a conduit, a capillary assembly and a pilot valve seat as described in any one of claims 1 to 8, wherein the valve seat body is located inside the conduit, the capillary assembly is welded to the pilot valve port, the arc surface of the valve seat body is welded to the inner wall of the conduit, and the opening of the accommodating space faces the inner wall of the conduit.

10. A reversing valve, characterized in that: Includes the pilot valve as described in claim 9.

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