Electromagnetic valve provided with position feedback device
By introducing a position feedback device into the solenoid valve and using a magnetic induction sensor to convert magnetic signals into electrical signals, the problem of the lack of feedback function in the solenoid valve is solved, and rapid and accurate fault diagnosis and position control are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 嘉兴科奥电磁技术有限公司
- Filing Date
- 2025-05-28
- Publication Date
- 2026-04-28
AI Technical Summary
The lack of feedback devices for product function switching in domestic solenoid valves makes it impossible to quickly and accurately diagnose faults and fails to meet European standards and the needs of some customers.
Design a solenoid valve with a position feedback device, including a stationary iron core, a moving iron core, an electromagnetic coil, a valve body, a valve core, a magnet assembly, and a feedback assembly. The magnetic field change of the magnet assembly is sensed by a magnetic induction sensor and converted into an electrical signal that is fed back to the client to achieve accurate positioning of the valve core switching position and fault diagnosis.
It achieves accurate positioning and feedback functions for the switching position of solenoid valve products, enabling rapid and accurate fault diagnosis and meeting European standards and customer requirements.
Smart Images
Figure CN224174624U_ABST
Abstract
Description
[Technical Field]
[0001] This utility model relates to the field of electromagnetic actuator technology, and in particular to an electromagnetic valve equipped with a position feedback device. [Background Technology]
[0002] Because the European standard's requirement for solenoid valves to install feedback devices for function switching was only recently updated (the latest European standard now mandates that solenoid valves require feedback devices for function switching), and domestic standards do not yet require this, currently only some customers are demanding this function. This presents new functional requirements for domestic solenoid valve suppliers, making it crucial to consider how to implement the feedback function in a simple, reliable, and accurate manner.
[0003] Therefore, it is necessary to propose a new technical solution to address the above problems. [Utility Model Content]
[0004] One of the objectives of this utility model is to provide a solenoid valve equipped with a position feedback device, which has the function of accurately positioning and providing feedback on the product switching position, thereby enabling quick and accurate determination of whether the solenoid valve installed product has malfunctioned.
[0005] According to one aspect of this utility model, a solenoid valve equipped with a position feedback device is provided, comprising: a stationary iron core; a moving iron core; an electromagnetic coil, which generates a magnetic field when energized to drive the moving iron core to move; a valve body forming a first cavity, the first cavity having an inlet interface and an outlet interface, the first cavity being used for fluid entry and exit; a valve core disposed in the first cavity and connected to the moving iron core, the moving iron core driving the valve core to switch positions to switch the working channel of the fluid; a magnet assembly for generating a stable magnetic field, the magnet assembly moving synchronously with the moving iron core; and a feedback component fixed to the valve body, the feedback component for sensing changes in the magnetic field strength of the magnet assembly to accurately locate the switching position of the valve core, and feeding back the located switching position information of the valve core to the client.
[0006] Furthermore, the feedback component includes a PCB board, a magnetic induction sensor, and sensor terminals. The magnetic induction sensor is used to sense the magnetic signal of the magnet component and convert it into a corresponding electrical signal. The electrical signal is transmitted to the sensor terminals via the PCB board, thereby feeding back to the client.
[0007] Furthermore, the magnet assembly includes a magnet bracket and a permanent magnet, the permanent magnet being fixed to a component that moves synchronously with the moving iron core via the magnet bracket.
[0008] Furthermore, the component that moves synchronously with the moving iron core is a push rod, which is fixedly connected to the moving iron core and connected to the valve core.
[0009] Furthermore, the valve housing has a second cavity, and the feedback component is located in the second cavity.
[0010] Furthermore, the solenoid valve equipped with the position feedback device also includes a reset spring located between the stationary iron core and the moving iron core. When the solenoid coil is energized, it generates a magnetic field to drive the moving iron core to move. At this time, the moving iron core overcomes the elastic force of the reset spring and attracts the stationary iron core. When the solenoid coil is de-energized, the reset spring drives the moving iron core to return to its initial position, at which time the moving iron core separates from the stationary iron core.
[0011] Furthermore, the solenoid valve equipped with a position feedback device is installed in the vehicle's thermal management system, and the solenoid valve equipped with a position feedback device realizes the control of different flow channels of the battery by the thermal management system according to the electrical signal.
[0012] Compared with the prior art, this utility model has the function of accurately positioning and feedback of product switching position, so as to quickly and accurately determine whether the solenoid valve installation product has malfunctioned. [Attached Image Description]
[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0014] Figure 1 This is a schematic diagram of the structure of a solenoid valve equipped with a position feedback device in one embodiment of the present invention;
[0015] Figure 2 This is a partial structural diagram of a solenoid valve equipped with a position feedback device in another embodiment of the present invention.
[0016] Figure 3 This is a schematic diagram of the installation structure of the magnet bracket and the permanent magnet in one embodiment of the present invention.
Detailed Implementation Methods
[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0018] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. Unless otherwise specified, the terms coupling, connection, linking, and interconnection used herein to indicate electrical connection mean direct or indirect connection. For example, A being connected to B includes both a direct electrical connection between A and B and a connection between A and B via electrical components or circuits.
[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "back", "positive", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0020] Please refer to Figure 1 As shown, it is a structural schematic diagram of a solenoid valve equipped with a position feedback device in one embodiment of the present invention. Figure 1 The solenoid valve shown with a position feedback device includes a stationary iron core 110, a moving iron core 120, an electromagnetic coil 130, a valve body 140, a valve core 150, a magnet assembly 160, and a feedback assembly 170.
[0021] The system comprises a first cavity 142 formed within the valve housing 140, which has an inlet port 1422 and an outlet port 1424, and is used for fluid entry and exit. A valve core 150 is disposed within the first cavity 142 and connected to the moving iron core 120, and the moving iron core 120 drives the valve core 150 to switch positions, thereby switching the fluid's working channel. A magnet assembly 160 generates a stable magnetic field and moves synchronously with the moving iron core 120. A feedback assembly 170 is fixed to the valve housing 140 and senses changes in the magnetic field strength of the magnet assembly 160 to accurately locate the switching position of the valve core 150, and feeds back the located valve core 150 switching position information to the client. The magnet assembly 160 and the feedback assembly 170 constitute a position feedback device.
[0022] Please refer to Figure 2 As shown, it is a partial structural schematic diagram of a solenoid valve equipped with a position feedback device in another embodiment of the present invention.
[0023] exist Figure 2 In the illustrated embodiment, the feedback component 170 includes a PCB board 172, a magnetic induction sensor 174, and a sensor terminal 176. The magnetic induction sensor 174 senses the magnetic signal of the magnet assembly 160 and converts it into a corresponding electrical signal. This electrical signal is transmitted to the sensor terminal 176 via the PCB board 172, thereby feeding back to the client (i.e., the sensor terminal 176 is used to transmit the electrical signal converted by the magnetic induction sensor 174 to the client). The magnet assembly 160 includes a magnet bracket 162 and a permanent magnet 164. The permanent magnet 164 is fixed to a component that moves synchronously with the follower iron core 120 via the magnet bracket 162.
[0024] Please refer to Figure 3 As shown, it is a schematic diagram of the installation structure of the magnet bracket and the permanent magnet in one embodiment of the present invention.
[0025] exist Figure 3 In the illustrated embodiment, the component that moves synchronously with the moving iron core 120 is the push rod 180. The push rod 180 passes through the moving iron core 120 axially and is fixedly connected to the moving iron core 120. One end of the push rod 180 is located in the shaft hole of the stationary iron core 110, and the other end is located in the first cavity 142 of the valve housing 140 and connected to the valve core 150 (see details). Figure 1 (As shown). The permanent magnet 164 is fixedly installed at the other end of the top rod 180 via the magnet bracket 162, so that the top rod 180 moves synchronously with the moving iron core 120.
[0026] exist Figure 1 In the embodiment shown, a second cavity 144 is formed inside the valve housing 140, and the feedback component 170 is located in the second cavity 144.
[0027] It should be noted that the permanent magnet 164 can be fixed to all parts that move synchronously with the follower iron core 120 through the magnet bracket 162; the feedback component 170 can be fixed in any cavity of the valve housing 140; the electrical signal fed back by the magnetic induction sensor 174 can be transmitted to the sensor terminal 176 through other electronic components and thus fed back to the client.
[0028] exist Figure 1In the illustrated embodiment, the return spring 190 is sleeved on the push rod 180 and located between the stationary iron core 110 and the moving iron core 120. When the product is energized (or when the electromagnetic coil 130 is energized), the moving iron core 120 overcomes the elastic force of the return spring 190 and attracts the stationary iron core 110 under the influence of electromagnetic force; after the power is turned off (or after the electromagnetic coil 130 is de-energized), the electromagnetic force disappears, and the stationary iron core 110 and the moving iron core 120 separate under the influence of the elastic force of the return spring 190. Alternatively, when the electromagnetic coil 130 is energized, it generates a magnetic field that drives the moving iron core 120 to move. At this time, the moving iron core 120 overcomes the elastic force of the return spring 190 and attracts the stationary iron core 110; after the electromagnetic coil 130 is de-energized, the return spring 190 drives the moving iron core 120 to return to its initial position, at which time the stationary iron core 110 and the moving iron core 120 separate.
[0029] By attracting and separating the stationary iron core 110 and the moving iron core 120, the entire movable assembly (e.g., the moving iron core 120, the push rod 180, and the valve core 150) will move (or switch positions) within a certain range. As the magnet bracket 162 on the movable assembly moves, the relative position of the permanent magnet 164 and the magnetic induction sensor 174 will also change, thereby causing the magnetic signal generated by the permanent magnet 164 to change.
[0030] In a preferred embodiment, the solenoid valve with a position feedback device provided by this invention is installed in the automotive thermal management system. The solenoid valve with the position feedback device controls different flow channels of the battery according to electrical signals, enabling precise control of the cooling system temperature under different operating conditions, thereby improving the energy efficiency and saving energy in the automotive thermal management system. The magnet assembly 160 and the feedback assembly 170 (i.e., the position feedback device) feed back information about whether the product's working channel has switched after power is turned on or off to the vehicle system, allowing the vehicle system to quickly and accurately determine whether the product has malfunctioned. This invention achieves miniaturization while meeting the above requirements by using a small PCB board 172, a magnetic induction sensor 174, and a permanent magnet 164 fixed on the push rod 180, without significantly affecting the product's external dimensions.
[0031] In summary, the solenoid valve with a position feedback device provided by this utility model has the function of accurately positioning and providing feedback on the product's switching position, thereby enabling quick and accurate determination of whether the solenoid valve installation product is malfunctioning. Specifically, by converting magnetic signals into electrical signals to provide feedback on the position of movable parts inside the product, the current actual state of the product is reflected, allowing the customer's vehicle system to accurately and in real time identify the operating status of the part, ensuring the normal operation of the thermal management system.
[0032] It should be noted that any modifications made by those skilled in the art to the specific embodiments of this utility model do not depart from the scope of the claims of this utility model. Accordingly, the scope of the claims of this utility model is not limited to the foregoing specific embodiments.
Claims
1. A solenoid valve equipped with a position feedback device, characterized in that, It includes: Static iron core; Moving iron core; An electromagnetic coil, when energized, generates a magnetic field that drives the moving iron core to move. A valve housing having a first cavity having an inlet port and an outlet port, the first cavity being used for the entry and exit of fluid; A valve core is disposed in the first cavity and connected to the moving iron core. The moving iron core drives the valve core to switch positions, thereby switching the working channel of the fluid. A magnet assembly for generating a stable magnetic field, the magnet assembly moving synchronously with the moving iron core; A feedback component, fixed to the valve housing, is used to sense changes in the magnetic field strength of the magnet assembly to accurately locate the switching position of the valve core and feed back the located switching position information of the valve core to the client.
2. The solenoid valve equipped with a position feedback device according to claim 1, characterized in that, The feedback component includes a PCB board, a magnetic induction sensor, and sensor terminals. The magnetic induction sensor is used to sense the magnetic signal of the magnet assembly and convert it into a corresponding electrical signal. The electrical signal is transmitted to the sensor terminal via the PCB board, thereby feeding back to the client.
3. The solenoid valve equipped with a position feedback device according to claim 2, characterized in that, The magnet assembly includes a magnet bracket and a permanent magnet, the permanent magnet being fixed to a part that moves synchronously with the moving iron core via the magnet bracket.
4. The solenoid valve equipped with a position feedback device according to claim 3, characterized in that, The part that moves synchronously with the moving iron core is the push rod. The push rod is fixedly connected to the moving iron core, and the push rod is also connected to the valve core.
5. The solenoid valve equipped with a position feedback device according to claim 1, characterized in that, The valve housing has a second cavity. The feedback component is located in the second cavity.
6. The solenoid valve equipped with a position feedback device according to claim 1, characterized in that, It also includes a return spring located between the stationary iron core and the moving iron core. When the electromagnetic coil is energized, it generates a magnetic field that drives the moving iron core to move. At this time, the moving iron core overcomes the elastic force of the return spring and attracts the stationary iron core. After the electromagnetic coil is de-energized, the reset spring drives the moving iron core to return to its initial position, at which point the moving iron core separates from the stationary iron core.
7. The solenoid valve equipped with a position feedback device according to any one of claims 1-6, characterized in that, The solenoid valve equipped with a position feedback device is installed in the vehicle's thermal management system. The solenoid valve equipped with a position feedback device enables the thermal management system to control different flow channels of the battery based on electrical signals.