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CN-122014889-A - Electromagnetic valve

CN122014889ACN 122014889 ACN122014889 ACN 122014889ACN-122014889-A

Abstract

The application discloses an electromagnetic valve, which comprises a valve body part and a piston part, wherein the valve body part comprises a valve body and a piston guide piece, the valve body is made of stainless steel, the piston guide piece is fixedly connected or in limit connection with the valve body, the piston guide piece is in sliding fit with the piston part, the valve body part comprises a main valve opening, the piston part can be abutted against the main valve opening, a valve cavity of the electromagnetic valve comprises a pilot cavity, and the pilot cavity is positioned at one side of the piston part far away from the main valve opening in the axial direction of the piston guide piece. According to the electromagnetic valve provided by the application, the valve body is made of stainless steel, the piston guide piece and the valve body are of a split structure, the piston component is in sliding fit with the piston guide piece, the piston guide piece is convenient to process and shape, and the dimensional accuracy of the matching part of the piston guide piece and the piston component is easy to guarantee.

Inventors

  • Request for anonymity
  • Request for anonymity

Assignees

  • 浙江三花商用制冷有限公司

Dates

Publication Date
20260512
Application Date
20250313
Priority Date
20241112

Claims (14)

  1. 1. The electromagnetic valve is characterized by comprising a valve body part (1) and a piston part (2), wherein the valve body part (1) comprises a valve body (11) and a piston guide (12), the valve body (11) is made of stainless steel, the piston guide (12) is fixedly connected or in limit connection with the valve body (11), the piston guide is in sliding fit with the piston part (2), the valve body part (1) comprises a main valve opening (112), the piston part (2) can be abutted against the main valve opening (112), a valve cavity of the electromagnetic valve comprises a pilot cavity (103), and the pilot cavity (103) is positioned on one side, far away from the main valve opening (112), of the piston part (2) in the axial direction of the piston guide (12); The valve body part (1) further comprises an end cover (13), an axial direction of the piston guide (12) is provided with a through-flow channel (113) between the end cover (13) and the piston guide (12), or one of the piston guide (12) and the end cover (13) is provided with the through-flow channel (113), the valve body part (1) comprises a valve guide cavity (102), the through-flow channel (113) is communicated with the pilot cavity (103) and the pilot valve cavity (102), the valve body part (1) comprises an inlet end (111) and an outlet end (116), and the pilot valve cavity (102) can be communicated with the outlet end (116).
  2. 2. The solenoid valve according to claim 1, characterized in that the end cap (13) comprises a first cylindrical portion (132), the first cylindrical portion (132) being located radially outside the piston guide (12) in the radial direction of the piston guide (12), a first annular chamber (133) being comprised between the piston guide (12) and the first cylindrical portion (132), the first annular chamber (133) communicating with the pilot chamber (103) through the flow passage (113), the first annular chamber (133) also communicating with the pilot chamber (102).
  3. 3. The solenoid valve according to claim 1 or 2, characterized in that the valve body part (1) comprises a piston guide (12A), the piston guide (12A) being the piston guide (12); the end cover (13) is cup-shaped, the end cover (13) comprises a cover part (131) and a first cylindrical part (132), and the first cylindrical part (132) extends from the cover part (131) towards the main valve opening part (112) side.
  4. 4. A solenoid valve according to claim 3, characterised in that the valve body part (1) further comprises a connecting piece (14), the connecting piece (14) comprising a base part (141) and a second cylindrical part (142), the second cylindrical part (142) extending from the base part (141) in the direction of the end cap (13) side, the piston conduit (12A) and the second cylindrical part (142) comprising a second annular chamber (143) therebetween, the first annular chamber (133) communicating with the second annular chamber (143), the base part (141) being fixedly connected with the valve body (11), the second cylindrical part (142) being fixedly connected with the first cylindrical part (132).
  5. 5. The electromagnetic valve according to claim 4, characterized in that the base part (141) comprises a first hole part (140), the valve body (11) comprises a second hole part (110), the valve body part (1) further comprises a flow guiding member (15), the flow guiding member (15) is located on the outer side of the valve body (11), one side end part of the flow guiding member (15) is connected with the first hole part (140), the other side end part of the flow guiding member (15) is connected with the second hole part (110), the flow guiding member (15) is provided with a flow guiding hole (151), and the flow guiding hole (151) is communicated with the flow passing channel (113) and the pilot valve cavity (102).
  6. 6. The electromagnetic valve according to claim 1, characterized in that the piston guide (12) comprises a cylindrical body (14 A1) and a connecting portion (14 A2), the cylindrical body (14 A1) is slidably fitted with the piston member (2), the cylindrical body (14 A1) is fixedly connected with the valve body (11), and the connecting portion (14 A2) is fixedly connected with the end cap (13A).
  7. 7. The electromagnetic valve according to claim 6, characterized in that the piston guide (12) is press-formed from a stainless steel plate, or the piston guide (12) is made of a stainless steel pipe, the connecting portion (14 A2) includes a radial protruding portion (14 a 21) and an axial protruding portion (14 a 22), the radial protruding portion (14 a 21) is bent from the cylindrical portion (14 A1) in a direction away from the cylindrical portion (14 A1) side in a radial direction of the cylindrical portion (14 A1), the axial protruding portion (14 a 22) is bent from the radial protruding portion (14 a 21) in a direction toward the end cap (13A) side, and the axial protruding portion (14 a 22) is fixedly connected to the end cap (13).
  8. 8. The electromagnetic valve according to claim 7, characterized in that the radial projection (14 a 21) comprises a first hole portion (140), the valve body (11) comprises a second hole portion (110), the valve body member (1) further comprises a flow guiding member (15), the flow guiding member (15) is located at the outer side of the valve body (11) and the radial outer side of the cylinder portion (14 A1), one side end portion of the flow guiding member (15) is connected with the first hole portion (140), the other side end portion of the flow guiding member (15) is connected with the second hole portion (110), the flow guiding member (15) is provided with a flow guiding hole (151), and the flow guiding hole (151) is communicated with the flow passing channel (113) and the pilot valve cavity (102).
  9. 9. The solenoid valve according to any one of claims 1 to 8, characterized in that the valve body part (1) further comprises a connecting piece (14), the connecting piece (14) being fixedly connected with the valve body (11), the connecting piece (14) being further fixedly connected with the end cap (13), the end cap (13) comprising a cap portion (131), the through-flow channel (113) being comprised between the cap portion (131) and the piston guide (12), or one of the piston guide (12) and the cap portion (131) comprising the through-flow channel (113).
  10. 10. A solenoid valve according to any one of claims 1 to 9, characterised in that said valve body (11) comprises a step (115), the step of said step (115) facing towards said end cap (13), said piston guide (12) being placed on said step (115), said piston guide (12) being welded to said valve body (11).
  11. 11. The solenoid valve according to any one of claims 1 to 10, wherein the valve body part (1) further comprises a valve seat (16), the valve seat (16) being a stamping, the valve seat (16) being fixedly connected to the valve body (11), the valve seat (16) comprising a support portion (162), the support portion (162) comprising the main valve port portion (112), the valve body part (1) comprising a pressure relief flow passage, the pressure relief flow passage being capable of communicating the pilot valve chamber (102) with the outlet end (116).
  12. 12. The solenoid valve of claim 11 wherein said valve body (11) includes a pilot port portion (114), said pilot port portion (114) being communicable with said pilot valve chamber (102), said pressure relief flow passage including at least a portion of said pilot port portion (114), said valve port seat (16) further including a base portion (161), said base portion (161) projecting away from said support portion (162) in a direction away from said piston member (2), said base portion (161) being welded to said outlet end (116), said base portion (161) including a side aperture (1611), said pressure relief flow passage further including at least a portion of said side aperture (1611), said side aperture (1611) communicating said pilot port portion (114) with an interior cavity of said valve port seat (16).
  13. 13. The electromagnetic valve according to any one of claims 1-12, characterized in that the piston part (2) comprises a piston (21), the outer circumferential surface (213) of the piston (21) comprises a first mating portion (2131), a transition portion (2132) and a second mating portion (2133), the first mating portion (2131) and the second mating portion (2133) being in sliding engagement with the piston guide (12), the outer diameter of the transition portion (2132) being smaller than the outer diameters of the first mating portion (2131) and the second mating portion (2133), the transition portion (2132) being located between the first mating portion (2131) and the second mating portion (2133), the piston part (2) further comprising a piston ring (22), the transition portion (2132) comprising an annular groove (2134), the piston ring (22) being partially located in the annular groove (4), the outer circumferential surface of the piston ring (22) being in abutment with the piston guide (12).
  14. 14. The electromagnetic valve according to claim 13, wherein the valve body component (1) further comprises a flow guiding element (15) and a valve port seat (16), the piston guiding element (12) is made of stainless steel, the end cover (13), the flow guiding element (15) and the valve port seat (16) are made of stainless steel, a first elastic element (23) is arranged between the piston (21) and the end cover (13), one end of the first elastic element (23) is abutted against the piston (21), the other end of the first elastic element (23) is abutted against the end cover (13), the piston (21) further comprises a cavity (210), a balance hole (211) and a flow guiding opening (212), the balance hole (211) is communicated with the cavity (210) and a main valve cavity (101) of the valve body (11), the flow through channel (113) is arranged between the end cover (13) and the piston guiding element (12), and when the piston (21) is abutted against the end cover (13), the flow guiding opening (212) corresponds to the flow through channel (113); the solenoid valve further comprises a pilot valve part (3), the pilot valve part (3) comprises a core iron part, the core iron part comprises a core iron (31) and a steel ball (33), the steel ball (33) is connected with the core iron (31), the valve body (11) further comprises a pilot valve opening (114), and in the valve closing state of the solenoid valve, the steel ball (33) is propped against the pilot valve opening (114).

Description

Electromagnetic valve Technical Field The invention relates to the technical field of valves for refrigeration systems, in particular to an electromagnetic valve. Background In a valve for a refrigeration system, fig. 1 is a schematic cross-sectional view of a solenoid valve of the background art, comprising a valve body part, a pilot valve part 2 'and a piston 3', the valve body part comprising a valve body 1 'made of brass, the valve body 1' being machined with a piston guide section 11 'cooperating with the piston 3', and the piston 3 'abutting the main valve opening of the valve body 1' in the closed state. The electromagnetic valve is generally operated in such a way that the piston 3 'can be far away from or abutted against the main valve opening by the energizing or de-energizing of the pilot valve part 2', thereby controlling the circulation and cutting-off of the refrigerant. Disclosure of Invention Based on the solenoid valve in the background art, the valve body is not only large in size, but also heavy in weight, so that the cost is high, and after the valve body is manufactured by stainless steel, the solenoid valve has the characteristics of no lead, small size and light weight. When the valve body made of stainless steel is processed, the inventor finds that the difficulty of directly processing the piston guide section in the valve body is high when the piston guide section is processed because the piston is matched with the piston guide section of the valve body, on one hand, the dimensional accuracy of the piston guide section cannot be ensured, and on the other hand, the processing and forming efficiency of the valve body is low. The invention provides an electromagnetic valve, which comprises a valve body part and a piston part, wherein the valve body part comprises a valve body and a piston guide piece, the valve body is made of stainless steel, the piston guide piece is fixedly connected or in limiting connection with the valve body, the piston guide piece is in sliding fit with the piston part, the valve body part comprises a main valve opening, the piston part can be abutted against the main valve opening, a valve cavity of the electromagnetic valve comprises a pilot cavity, the pilot cavity is positioned at one side of the piston part far away from the main valve opening in the axial direction of the piston guide piece, the valve body part further comprises an end cover, a flow passage is arranged between the end cover and the piston guide piece in the axial direction of the piston guide piece, or one of the piston guide piece and the end cover comprises a flow passage, the valve body part comprises a guide cavity, the flow passage is communicated with the pilot cavity and the pilot valve cavity, the valve body part comprises an inlet end and an outlet end, and the guide cavity can be communicated with the outlet end. According to the electromagnetic valve provided by the application, the valve body is made of stainless steel, the piston guide piece and the valve body are of a split structure, the piston component is in sliding fit with the piston guide piece, the piston guide piece is convenient to machine and shape, the dimensional accuracy of the matching part of the piston guide piece and the piston component is easy to guarantee, and the machining and shaping efficiency of the electromagnetic valve is improved. Drawings FIG. 1 is a schematic cross-sectional view of a solenoid valve of the background art; FIG. 2 is a schematic cross-sectional view of a solenoid valve according to the present invention in a closed state; FIG. 3 is a schematic cross-sectional view of the solenoid valve of FIG. 2 in an open state; FIG. 4 is an enlarged schematic view of FIG. 2 at A; FIG. 5 is an enlarged schematic view at B in FIG. 3; FIG. 6 is an enlarged schematic view of another example of the flow-through channel at B in FIG. 3; FIG. 7 is an enlarged schematic view of yet another example of the flow passage at B in FIG. 3; FIG. 8 is a schematic perspective view of the piston of FIG. 2; FIG. 9 is a schematic cross-sectional view of the valve port seat of FIG. 2; FIG. 10 is a schematic cross-sectional view of another solenoid valve according to the present disclosure in a closed state; fig. 11 is an enlarged schematic view at C in fig. 7. The reference numerals in fig. 2-11 are: 1-valve body part, 101-main valve cavity, 102-pilot valve cavity, 103-pilot valve cavity, 11-valve body, 110-second bore portion, 111-inlet end, 112-main valve port portion, 113-through flow passage, 114-pilot valve port portion, 115-step portion, 116-outlet end, 12-Piston guide, 12A-piston guide, 13/13A-end cap, 131-cap, 132-first barrel, 133-first annular chamber, 14-connector, 140-first bore, 141-base, 142-second barrel, 143-second annular chamber, 14A 1-barrel, 14A 2-connector, 14A 21-radial projection, 14A 22-axial projection, 15-guide, 151-deflector bore, 16-valve port seat, 161-base, 1611-side bore, 162-support, 18