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CN-122014880-A - Electric valve and automobile thermal management system

CN122014880ACN 122014880 ACN122014880 ACN 122014880ACN-122014880-A

Abstract

The invention provides an electric valve and an automobile thermal management system. The electric valve comprises a driving part, a valve body, a screw rod, a first valve core, a second valve core, a first elastic piece and a second elastic piece. The invention drives the first valve core and the second valve core to move up and down linearly to be matched with the first valve port and the second valve port through the screw rod, thereby realizing the proportion adjustment and the switching of the flow channels. And through the inside and outside of first case set up first elastic component and second elastic component respectively, provide pretightning force respectively for closing first valve port and second valve port, realize the close laminating of case and valve port after the runner switches over, guarantee that the motorised valve can overcome the screw clearance even under the outage condition, still can maintain runner break-make mode for the motorised valve can steady operation.

Inventors

  • ZHANG HUABIN

Assignees

  • 常州恒创热管理系统股份有限公司

Dates

Publication Date
20260512
Application Date
20260212

Claims (10)

  1. 1. An electrically operated valve, comprising: a drive member comprising a nut assembly; A valve body, in which a valve cavity is formed; The first interface is arranged on the valve body and is communicated with the valve cavity; The second interface is arranged on the valve body and communicated with the valve cavity, and the second interface is positioned below the first interface in the axial direction of the valve body; the first valve port is arranged between the first interface and the second interface along the circumferential direction of the valve cavity; the screw rod is arranged in the valve cavity and is in threaded fit with the nut component, and the screw rod can move up and down along the axial direction of the valve body under the drive of the driving component; The first boss part is fixedly arranged on the screw rod; the limiting part is fixedly arranged at the end part of the screw rod, which is far away from the driving part; The first valve core is sleeved on the screw rod and arranged between the first boss part and the limiting part, and can move relative to the screw rod; The second valve core is arranged in the valve cavity, a first channel and a second channel are arranged in the second valve core, the first channel is positioned at the upper part of the second valve core, the first valve core is arranged in the first channel, the second channel is positioned at the lower part of the second valve core, the outer diameter of the limiting part is smaller than the inner diameter of the second channel and can move into the second channel, and the outer diameter of the first valve core is larger than the inner diameter of the second channel; The first sealing part is arranged on the outer side surface of the second valve core and can prop against the first valve port to form a sealing surface; the first elastic piece is arranged between the first valve core and the first boss part; When the screw rod moves downwards until the first sealing part abuts against the first valve port, the screw rod continues to move downwards to continuously compress the first elastic piece, and the first elastic piece pushes the second valve core to move downwards or keeps the second valve core to have a downward movement trend.
  2. 2. The electrically operated valve of claim 1, further comprising: The third interface is arranged on the valve body and communicated with the valve cavity, and the third interface is arranged above the first interface in the axial direction of the valve body; the second valve port is arranged between the first interface and the third interface along the circumferential direction of the valve cavity; the second sealing part is arranged on the outer side surface of the second valve core and can prop against the second valve port to form a sealing surface; The second boss part is arranged at the upper part of the second valve core and protrudes towards the screw rod side; The second elastic piece is arranged between the first valve core and the second boss part; When the screw rod moves upwards until the second sealing part abuts against the second valve port, the screw rod continues to move upwards to continuously compress the second elastic piece, and the second elastic piece pushes the second valve core to move upwards or keeps the second valve core to have a trend of moving upwards.
  3. 3. The electrically operated valve of claim 1, wherein said drive member comprises: A stator assembly; The rotor assembly comprises a rotor piece sleeved in the stator assembly and a connecting piece rotating integrally with the rotor piece, and the rotor assembly can rotate in an excitation magnetic field generated by the stator assembly; the nut assembly comprises a plastic nut which rotates integrally with the connecting piece, and a threaded part of the screw rod is sleeved in the plastic nut and is in threaded fit with the nut assembly.
  4. 4. The electrically operated valve of claim 3 wherein said rotor member and said connector are integrally formed by an injection molding process to form a rotor assembly, said rotor assembly being fixedly connected to said plastic nut by an injection molding process.
  5. 5. The electrically operated valve of claim 2 wherein said first valve element comprises a base portion sleeved on a lead screw and a sleeve portion provided on said base portion, said base portion and sleeve portion being of unitary construction, said first resilient member being located within said sleeve portion and said second resilient member being located outside said sleeve portion.
  6. 6. The electric valve of claim 1, wherein a limiting disc is further arranged in the valve cavity, the outer side of the limiting disc is fixedly connected with the valve body, a through hole is formed in the limiting disc, and the screw rod assembly penetrates through the through hole.
  7. 7. The electrically operated valve of claim 1, wherein said second spool further comprises: the sealing section is formed on the outer side surface of the second valve core, and the outer wall of the sealing section is attached to the inner wall of the valve cavity and can move along the valve cavity; The runner section is arranged at the lower part of the sealing section, and the outer diameter of the runner is smaller than the inner diameter of the valve cavity; the second sealing part is positioned at the lower part of the flow passage section, and the outer diameter of the second sealing part is larger than the inner diameter of the first valve port and smaller than the inner diameter of the valve cavity between the first valve port and the second valve port; The first sealing part is positioned below the second sealing part and is separated from the second sealing part by a preset distance, and the outer diameter of the first sealing part is larger than the inner diameter of the first valve port and smaller than the inner diameter of the valve cavity between the first valve port and the second valve port.
  8. 8. The electrically operated valve of claim 7, wherein the first port is a sealing ring made of PTFE material, the second port is a sealing ring made of PTFE material, and the first port and the second port have the same structure and are mirror images distributed on the upper side and the lower side of the first port.
  9. 9. The electrically operated valve of claim 8, wherein the first valve port comprises a fixed portion press-fit within a clamping groove of the valve body and a sealing portion that is an annular boss ramp facing the first sealing portion.
  10. 10. An automotive thermal management system comprising the electrically operated valve of any one of claims 1 to 9.

Description

Electric valve and automobile thermal management system Technical Field The invention relates to the technical field of control valves, in particular to an electric valve and an automobile thermal management system. Background In the refrigeration cycle, a multi-way valve is often used as a core member for regulating a refrigerant flow path. The linear module driven electric valve comprises a driving part, a nut, a screw rod and a valve core part, wherein the screw rod is in threaded connection with the nut, and the driving part drives the nut to rotate, so that the screw rod drives the valve core part to axially move to block or open the valve port. When the driving assembly stops rotating, due to the fact that a thread clearance exists between the nut assembly and the screw rod portion, the sealing performance between the valve core portion and the valve port is poor, and therefore the flow control accuracy of the electric valve is reduced. Accordingly, there is a need for an electrically operated valve and an automotive thermal management system that overcomes the above-described drawbacks. Disclosure of Invention The invention aims to provide an electric valve and an automobile thermal management system. According to one aspect of the present invention, there is provided an electric valve and an automobile thermal management system, comprising: a drive member comprising a nut assembly; A valve body, in which a valve cavity is formed; The first interface is arranged on the valve body and is communicated with the valve cavity; The second interface is arranged on the valve body and communicated with the valve cavity, and the second interface is positioned below the first interface in the axial direction of the valve body; the first valve port is arranged between the first interface and the second interface along the circumferential direction of the valve cavity; the screw rod is arranged in the valve cavity and is in threaded fit with the nut component, and the screw rod can move up and down along the axial direction of the valve body under the drive of the driving component; The first boss part is fixedly arranged on the screw rod; the limiting part is fixedly arranged at the end part of the screw rod, which is far away from the driving part; The first valve core is sleeved on the screw rod and arranged between the first boss part and the limiting part, and can move relative to the screw rod; The second valve core is arranged in the valve cavity, a first channel and a second channel are arranged in the second valve core, the first channel is positioned at the upper part of the second valve core, the first valve core is arranged in the first channel, the second channel is positioned at the lower part of the second valve core, the outer diameter of the limiting part is smaller than the inner diameter of the second channel and can move into the second channel, and the outer diameter of the first valve core is larger than the inner diameter of the second channel; The first sealing part is arranged on the outer side surface of the second valve core and can prop against the first valve port to form a sealing surface; the first elastic piece is arranged between the first valve core and the first boss part; When the screw rod moves downwards until the first sealing part abuts against the first valve port, the screw rod continues to move downwards to continuously compress the first elastic piece, and the first elastic piece pushes the second valve core to move downwards or keeps the second valve core to have a downward movement trend. Preferably, the method further comprises: The third interface is arranged on the valve body and communicated with the valve cavity, and the third interface is arranged above the first interface in the axial direction of the valve body; the second valve port is arranged between the first interface and the third interface along the circumferential direction of the valve cavity; the second sealing part is arranged on the outer side surface of the second valve core and can prop against the second valve port to form a sealing surface, The second boss part is arranged at the upper part of the second valve core and protrudes towards the screw rod side; The second elastic piece is arranged between the first valve core and the second boss part; When the screw rod moves upwards until the second sealing part abuts against the second valve port, the screw rod continues to move upwards to continuously compress the second elastic piece, and the second elastic piece pushes the second valve core to move upwards or keeps the second valve core to have a trend of moving upwards. Preferably, the driving part includes: A stator assembly; The rotor assembly comprises a rotor piece sleeved in the stator assembly and a connecting piece rotating integrally with the rotor piece, and the rotor assembly can rotate in an excitation magnetic field generated by the stator assembly; the nut assembly comprises a pla