A coolant switching solenoid valve

Abstract

A coolant switching solenoid valve includes a valve seat, a valve body, a valve core, a first spring, and an electromagnetic drive assembly. The valve seat has an inlet port, an outlet port, a valve port, and a corresponding flow channel. The valve core is movably mounted in the valve body. The first spring provides a normally closed sealing force for the valve core. The electromagnetic drive assembly can drive the valve core to open the flow channel. An installation groove is formed at the end of the valve core, and a second spring and a sealing block are housed within the groove, forming a two-stage sealing pre-tightening structure. The outlet flow channel is coaxial with the valve port. The inlet flow channel is an inclined horseshoe-shaped structure surrounding the outlet flow channel, and a conical boss is provided at the inlet end of the outlet flow channel. The electromagnetic drive assembly consists of a fixed iron core, a C-shaped yoke frame, a coil, and a guide sleeve. This design improves sealing reliability through a double-spring seal, reduces movement impact through a buffer structure, optimizes the flow channel to reduce flow resistance, and features a compact overall structure, convenient assembly, and effectively extends service life. It is suitable for coolant circuit on / off control.

Description

Technical Field

[0001] This invention relates to solenoid valve technology, and more specifically to a switching solenoid valve for controlling a coolant circuit. Background Technology

[0002] Coolant switching solenoid valves are widely used in automotive thermal management, industrial cooling systems, and other fields to control the flow of coolant. Existing coolant switching solenoid valves generally employ a single spring and single sealing surface structure, which has the following technical drawbacks:

[0003] Poor sealing reliability: The valve core directly drives the sealing block to close, and the impact of the valve core movement can easily cause the sealing block to not fit tightly with the valve port, resulting in coolant leakage;

[0004] Insufficient buffering effect: There is no buffering structure during the reciprocating motion of the valve core. Long-term use can easily cause wear of the sealing block and damage to the valve port, shortening the service life of the solenoid valve.

[0005] Inadequate flow channel design: The layout of the inlet and outlet flow channels is messy, resulting in high resistance to coolant flow and affecting the circulation efficiency of the cooling system.

[0006] Therefore, developing a coolant switching solenoid valve that is reliable in sealing, has good buffering performance, and allows for smooth flow has become an urgent technical problem to be solved in this field. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a coolant switching solenoid valve that solves the technical problems of unreliable sealing, lack of buffering, and high flow resistance in existing solenoid valves.

[0008] To achieve the above and other related objectives, the present invention provides a coolant switching solenoid valve, comprising a valve seat, a valve body, a valve core, a first spring, and an electromagnetic drive assembly. The valve seat has an inlet port, an outlet port, and a valve port. The valve seat has an inlet channel connecting the inlet port and the valve port, and an outlet channel connecting the outlet port and the valve port. The valve body is located at the valve port, and the valve core is movably inserted into the valve body and corresponding to the inlet end of the outlet channel. The first spring is sleeved on the outer periphery of the valve core and applies an elastic force to the valve core to block the liquid inlet end of the liquid outlet channel. The electromagnetic drive assembly is disposed in the valve body and is used to drive the valve core to overcome the elastic force to open the liquid inlet end of the liquid outlet channel. The end of the valve core is provided with an inwardly extending mounting groove. The groove opening is provided with a sealing block corresponding to the liquid inlet end of the liquid outlet channel. A second spring is provided in the mounting groove. One end of the second spring abuts against the bottom of the mounting groove, and the other end abuts against the sealing block.

[0009] The preferred technical solution is that the liquid outlet channel is coaxially arranged with the valve port, and the liquid inlet channel is configured as an annular structure that is inclined around the liquid outlet channel.

[0010] The preferred technical solution is that a conical protrusion is formed at the inlet end of the liquid outlet channel.

[0011] A preferred technical solution is as follows: the electromagnetic drive assembly includes a guide sleeve, a fixed iron core, a coil, a winding shaft, a yoke frame, a wire, and a connector. The guide sleeve is coaxially connected to the valve port. The fixed iron core is fixedly inserted into the end of the guide sleeve away from the valve port. The winding shaft is sleeved on the outer periphery of the guide sleeve. The coil is wound on the winding shaft. The yoke frame is located on the outer periphery of the coil and fixes the fixed iron core and the guide sleeve. The valve body covers the periphery of the yoke frame. One end of the wire is connected to both ends of the coil through the valve body, and the other end is connected to the external connector.

[0012] The preferred technical solution is as follows: the valve core is movably inserted into the guide sleeve near the valve port as a moving iron core, the first spring is sleeved on the outer periphery of the valve core, one end of the first spring abuts against the guide sleeve, and the other end abuts against the lip of the valve core that is folded outward.

[0013] The preferred technical solution is as follows: the yoke frame structure has a C-shaped frame structure and includes a first horizontal section, a second horizontal section and a vertical section connecting the first horizontal section and the second horizontal section. The first horizontal section is provided with a first insertion hole, and the second horizontal section is provided with a second insertion hole. The fixed iron core passes through the first insertion hole at least partially and extends out of the valve body. The portion of the fixed iron core extending out of the valve body is screwed with a nut.

[0014] The preferred technical solution is that the guide sleeve at least partially passes through the second insertion hole and extends out of the valve body, and the part of the guide sleeve extending out of the valve body is integrally formed with an external hexagonal screw structure.

[0015] The preferred technical solution is that the guide sleeve and the valve port are connected by a thread.

[0016] The preferred technical solution is that a buffer pad is provided at the bottom of the mounting groove.

[0017] The preferred technical solution is that a filter screen is provided in the liquid inlet interface.

[0018] Due to the application of the above technical solution, the beneficial effects of this invention are as follows:

[0019] Improved sealing reliability: The dual-spring pre-tightening structure with a first spring and a second spring ensures a tighter fit between the sealing block and the inlet end of the liquid outlet channel, fundamentally solving the problem of coolant leakage.

[0020] Extended service life: The second spring and the buffer pad form a buffer structure, reducing the impact of movement, reducing wear on the sealing block and valve port, and significantly improving the durability of the solenoid valve;

[0021] Improved flow efficiency: The optimized horseshoe-shaped inclined inlet flow channel layout reduces coolant flow resistance and ensures efficient cooling system circulation.

[0022] Easy assembly and maintenance: The guide sleeve has an external hexagonal structure and a threaded connection design, which facilitates the assembly and maintenance of the solenoid valve. Attached Figure Description

[0023] Figure 1 This is a schematic cross-sectional view of the coolant switching solenoid valve involved in the present invention.

[0024] Figure 2 This is a schematic diagram of the valve seat structure involved in the present invention. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0026] Please see Figures 1-2 It should be noted that in the description of this invention, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Example:

[0029] like Figure 1 As shown, according to a general technical concept of the present invention, a coolant switching solenoid valve is provided, including a valve seat 1, a valve body 2, a valve core 3, a first spring 4, and an electromagnetic drive assembly 5. An inlet port 11, an outlet port 12, and a valve port 13 are machined on the valve seat 1. An inlet flow channel 14 and an outlet flow channel 15 are formed inside the valve seat 1. The inlet flow channel 14 connects the inlet port 11 and the valve port 13, and the outlet flow channel 15 connects the outlet port 12 and the valve port 13.

[0030] The valve body 2 is fixedly installed at the valve port 13, and the valve core 3 is movably inserted inside the valve body 2, corresponding to the position of the liquid inlet end of the liquid outlet channel 15. The first spring 4 is sleeved on the outside of the valve core 3, providing the valve core 3 with an elastic force toward the liquid inlet end of the liquid outlet channel 15, thereby achieving normal closure and sealing.

[0031] The electromagnetic drive component 5 is installed inside the valve body 2. When energized, it generates electromagnetic attraction, which drives the valve core 3 to retract against the elastic force of the first spring 4 and open the liquid inlet end of the liquid outlet channel 15.

[0032] A mounting groove 31 extending inward is provided at one end of the valve core 3 near the valve port 13. A sealing block 6 is installed at the opening of the mounting groove 31, and the sealing block 6 is sealed to the inlet end of the liquid outlet channel 15. A second spring 7 is provided inside the mounting groove 31. One end of the second spring 7 abuts against the bottom of the mounting groove 31, and the other end abuts against the sealing block 6, forming a two-stage sealing pre-tightening.

[0033] The outlet flow channel 15 is arranged coaxially with the valve port, and the inlet flow channel 14 is an inclined horseshoe-shaped structure surrounding the outlet flow channel to reduce the flow resistance of the coolant. A conical boss is machined at the inlet end of the outlet flow channel 14 to facilitate the coolant to apply pressure to the sealing block 6, thereby opening the inlet end of the outlet flow channel 15.

[0034] The electromagnetic drive assembly 5 includes a guide sleeve 51, a fixed iron core 42, a winding shaft 53, a coil 54, a yoke frame 55, a wire 56, and a connector 57. The guide sleeve 51 is coaxially connected to the valve port 13. The fixed iron core 42 is fixedly inserted into the end of the guide sleeve 51 away from the valve port 13. The winding shaft 53 is sleeved on the outer periphery of the guide sleeve 51. The coil 54 is wound on the winding shaft 53. The yoke frame 55 is located on the outer periphery of the coil 54 and fixes the fixed iron core 52 and the guide sleeve 51. The valve body 2 covers the outer periphery of the yoke frame 55. One end of the wire 56 is connected to both ends of the coil 54 through the valve body 2, and the other end is connected to the external connector 57 to realize power control.

[0035] The valve core 3, as a moving iron core, is movably inserted into the guide sleeve 51 at one end near the valve port 13; one end of the first spring 4 abuts against the guide sleeve 51, and the other end abuts against the outwardly turned lip at the end of the valve core 3, ensuring stable transmission of spring force.

[0036] The first horizontal section of the yoke frame 55 has a first insertion hole, and the second horizontal section has a second insertion hole; the fixed iron core 52 extends out of the valve body 2 through the first insertion hole, and the extended end is screwed with a nut 8 to fix it; the guide sleeve 51 extends out of the valve body 2 through the second insertion hole, and the extended end is integrally formed with an external hexagonal screw-tightening structure 511 for easy assembly and tightening.

[0037] The guide sleeve 51 and the valve port 13 are connected by threads, ensuring a secure connection and facilitating assembly and disassembly. A buffer pad is attached to the bottom of the mounting groove 31 to absorb impacts during movement. A filter screen 9 is installed inside the liquid inlet 11 to filter impurities in the coolant and prevent clogging of the valve port 13.

[0038] Working principle:

[0039] When the solenoid valve is de-energized, the first spring pushes the valve core to move toward the valve port, and the second spring further pushes the sealing block to tightly fit the liquid outlet inlet end, blocking the flow of coolant.

[0040] When the solenoid valve is energized, the electromagnetic drive component generates electromagnetic attraction, which drives the valve core to retract against the elastic force of the first spring. The coolant impacts the bottom of the sealing block, and the sealing block overcomes the elastic force of the second spring and detaches from the inlet end of the outlet flow channel. The coolant then flows through the inlet port, inlet flow channel, valve port, outlet flow channel, and outlet port.

[0041] The second spring, in conjunction with the buffer pad, absorbs the impact of the valve core movement, ensuring a stable coolant flow rate. The horseshoe-shaped inclined inlet channel reduces the resistance to coolant flow.

[0042] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A coolant switching solenoid valve, comprising a valve seat, a valve body, a valve core, a first spring, and an electromagnetic drive assembly, wherein the valve seat is provided with an inlet port, an outlet port, and a valve port; the valve seat has an inlet channel communicating with the inlet port and the valve port; the valve seat has an outlet channel communicating with the outlet port and the valve port; the valve body is disposed at the valve port; the valve core is movably inserted into the valve body and correspondingly disposed with respect to the inlet end of the outlet channel; the first spring is sleeved on the outer periphery of the valve core and applies an elastic force to the valve core to block the inlet end of the outlet channel; the electromagnetic drive assembly is disposed in the valve body and is used to drive the valve core to overcome the elastic force to open the inlet end of the outlet channel, characterized in that: The valve core has an inwardly extending mounting groove at its end. The groove opening has a sealing block corresponding to the liquid inlet end of the liquid outlet channel. A second spring is provided in the mounting groove. One end of the second spring abuts against the bottom of the mounting groove, and the other end abuts against the sealing block.

2. The coolant switching solenoid valve according to claim 1, characterized in that: The liquid outlet channel is coaxially arranged with the valve port, and the liquid inlet channel is configured as an annular structure that is inclined around the liquid outlet channel.

3. The coolant switching solenoid valve according to claim 1, characterized in that: The inlet end of the liquid outlet channel has a conical protrusion.

4. A coolant switching solenoid valve according to claim 1, characterized in that: The electromagnetic drive assembly includes a guide sleeve, a fixed iron core, a coil, a winding shaft, a yoke frame, a wire, and a connector. The guide sleeve is coaxially connected to the valve port. The fixed iron core is fixedly inserted into the end of the guide sleeve away from the valve port. The winding shaft is sleeved on the outer periphery of the guide sleeve. The coil is wound on the winding shaft. The yoke frame is located on the outer periphery of the coil and fixes the fixed iron core and the guide sleeve. The valve body covers the periphery of the yoke frame. One end of the wire is connected to both ends of the coil through the valve body, and the other end is connected to the external connector.

5. A coolant switching solenoid valve according to claim 4, characterized in that: The valve core is movably inserted into the guide sleeve near the valve port as a moving iron core. The first spring is sleeved on the outer periphery of the valve core. One end of the first spring abuts against the guide sleeve, and the other end abuts against the outwardly folded lip of the valve core end.

6. A coolant switching solenoid valve according to claim 4, characterized in that: The yoke frame has a C-shaped cross-section and includes a first horizontal section, a second horizontal section, and a vertical section connecting the first horizontal section and the second horizontal section. The first horizontal section has a first insertion hole, and the second horizontal section has a second insertion hole. The fixed iron core passes through the first insertion hole at least partially and extends out of the valve body. The portion of the fixed iron core extending out of the valve body is screwed with a nut.

7. A coolant switching solenoid valve according to claim 6, characterized in that: The guide sleeve passes through at least part of the second insertion hole and extends out of the valve body. The portion of the guide sleeve extending out of the valve body is integrally formed with an external hexagonal screw structure.

8. A coolant switching solenoid valve according to claim 4, characterized in that: The guide sleeve and the valve port are connected by threads.

9. A coolant switching solenoid valve according to claim 1, characterized in that: The bottom of the mounting slot is equipped with a buffer pad.

10. A coolant switching solenoid valve according to claim 1, characterized in that: The liquid inlet is equipped with a filter screen.

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