CN219841123U - Electromagnetic valve - Google Patents

Abstract

The utility model discloses a solenoid valve, which comprises: a valve housing configured with a receiving cavity, an inlet and an outlet; the valve plug is movably arranged in the accommodating cavity and is provided with a first flow channel, one end of the valve plug, which is opposite to the outlet, is provided with a valve cavity, and the valve cavity is communicated with the outlet through the first flow channel; the magnetic core assembly is movably arranged in the valve shell between an opening position and a closing position, the inlet and the outlet are communicated when the magnetic core assembly is in the opening position, the first flow passage and the valve cavity are disconnected when the magnetic core assembly is in the closing position, and the valve plug is driven to disconnect the inlet from the outlet; a seal ring provided between an inner peripheral surface of the accommodation chamber and an outer peripheral surface of the valve plug; the sealing ring is provided with a notch to form a second flow passage, and the valve cavity is communicated with the inlet through the second flow passage when the magnetic core assembly is positioned at the closing position. The electromagnetic valve provided by the embodiment of the utility model has the advantages of stable switch, sensitive response, low energy consumption, convenience in mounting the sealing ring and the like.

Description

Electromagnetic valve

Technical Field

The utility model relates to the technical field of fluid control, in particular to an electromagnetic valve.

Background

The electromagnetic valve in the related art can be applied to an air conditioning system to control refrigerant media in the air conditioning system, but has the problems of slow response, unstable switch, high energy consumption, complicated sealing ring installation and the like due to unreasonable structure of the electromagnetic valve.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a solenoid valve which has advantages of stable switching, sensitive response, low energy consumption, convenient installation of a sealing ring, etc.

In order to achieve the above object, according to an embodiment of the present utility model, there is provided a solenoid valve including: a valve housing configured with a receiving cavity, an inlet and an outlet; the valve plug is movably arranged in the accommodating cavity and is provided with a first flow passage, one end of the valve plug, which is opposite to the outlet, is provided with a valve cavity, and the valve cavity is communicated with the outlet through the first flow passage; the magnetic core assembly is movably arranged in the valve housing between an opening position and a closing position, the inlet and the outlet are communicated when the magnetic core assembly is in the opening position, the first flow passage and the valve cavity are disconnected when the magnetic core assembly is in the closing position, and the valve plug is driven to disconnect the inlet from the outlet; a seal ring provided between an inner peripheral surface of the accommodation chamber and an outer peripheral surface of the valve plug; the sealing ring is provided with a notch to form a second flow passage, and the valve cavity is communicated with the inlet through the second flow passage when the magnetic core assembly is positioned at the closing position.

According to the electromagnetic valve provided by the embodiment of the utility model, when the magnetic core assembly is in the closed position, the communication between the inlet and the outlet is disconnected, the refrigerant medium in the air conditioning system can flow in from the inlet and then flow to the valve cavity through the second flow channel, and because the first flow channel is disconnected from the valve cavity, the refrigerant medium in the valve cavity cannot flow out from the first flow channel, and the refrigerant medium is accumulated in the valve cavity, so that the pressure difference is formed between the valve cavity and the outlet, the closing reliability of the electromagnetic valve is ensured, and in the process of switching the magnetic core assembly from the closed position to the open position, the first flow channel is communicated with the valve cavity, and the refrigerant medium in the valve cavity can flow to the outlet through the first flow channel to balance the air pressure between the valve cavity and the outlet, so that the electromagnetic valve is opened more rapidly, the response is sensitive, and the energy consumption is reduced. And through setting up the breach on the sealing ring, the breach both can form the second flow path, leaves the deformation space of sealing ring again simultaneously, is convenient for locate the valve plug with the sealing ring cover, and the dismouting is more convenient.

The electromagnetic valve provided by the embodiment of the utility model has the advantages of stable switch, sensitive response, low energy consumption, convenience in mounting the sealing ring and the like.

According to some embodiments of the utility model, the smallest cross-sectional area of the second flow channel is smaller than the smallest cross-sectional area of the first flow channel.

According to some embodiments of the utility model, the second flow passage breaks the seal ring in a circumferential direction of the seal ring, the seal ring having end faces on opposite sides of the second flow passage, the end faces being disposed obliquely to an axial direction of the seal ring.

According to some embodiments of the utility model, an annular groove is formed in the outer peripheral surface of the valve plug, the sealing ring is mounted on the annular groove, and the sealing ring is in interference fit with the inner peripheral surface of the accommodating cavity.

According to some embodiments of the utility model, the valve cavity is formed in the valve plug, and an end of the valve cavity facing away from the outlet is open to communicate with the second flow passage.

According to some embodiments of the utility model, the first flow passage penetrates the valve plug in an axial direction of the valve plug, the valve cavity surrounds the first flow passage, and an end of the valve cavity, which is opposite to the outlet, is communicated with an end of the first flow passage, which is opposite to the outlet.

According to some embodiments of the utility model, the valve plug is further configured with a third flow passage through which the valve chamber communicates with the inlet; wherein the sum of the smallest cross-sectional area of the second flow channel and the smallest cross-sectional area of the third flow channel is smaller than the smallest cross-sectional area of the first flow channel.

According to some embodiments of the utility model, the third flow passage is configured at an outer circumferential wall of the valve plug, the inlet is configured at a circumferential wall of the receiving chamber, and the third flow passage is located between the inlet and the sealing ring in an axial direction of the valve housing.

According to some embodiments of the utility model, the valve plug comprises: the plug body is movably arranged in the accommodating cavity, the third flow passage and the valve cavity are formed in the plug body, the plug body is also provided with a pressure release channel penetrating through the plug body, the valve cavity surrounds the pressure release channel, and the sealing ring is arranged between the inner peripheral surface of the accommodating cavity and the outer peripheral surface of the plug body; the pressure release piece is arranged at one end of the plug body, which is opposite to the outlet, and covers the pressure release channel, the pressure release piece is provided with at least one pressure release hole, and the pressure release hole is communicated with the pressure release channel to form the first flow channel; the magnetic core assembly is abutted to the pressure release piece when being in the closing position, the pressure release hole is blocked, and the valve cavity is disconnected from the first flow channel.

According to some embodiments of the utility model, a sleeve and a gasket are mounted to an end of the magnetic core assembly facing the pressure relief piece, the sleeve mounting the gasket to the magnetic core assembly; when the magnetic core component is in the closing position, the sealing gasket is abutted against the pressure release piece to seal the pressure release hole.

According to some embodiments of the utility model, the magnetic core assembly comprises: the movable magnetic core is movably arranged on the valve housing; the push rod is connected with the movable magnetic core; the first elastic piece is arranged between the push rod and the valve housing; wherein when the coil is energized, the movable magnetic core is magnetically attracted to move the magnetic core assembly from the open position to the closed position, the pushrod compresses the first elastic member and drives the valve plug to disconnect the inlet and the outlet; when the coil is powered off, the first elastic piece passes through the push rod by utilizing self elastic force so as to enable the magnetic core assembly to move from the closed position to the open position.

According to some embodiments of the utility model, the valve housing comprises: the accommodating cavity and the inlet are formed in the valve body, and the accommodating cavity penetrates through the valve body; the valve seat is connected with one end of the valve body, the outlet is formed in the valve seat, and a second elastic piece is arranged between the valve seat and the valve plug; the magnetic core cover is connected with the other end of the valve body, the movable magnetic core is movably arranged on the magnetic core cover, and the push rod stretches into the accommodating cavity; wherein when the coil is energized, the magnetic core assembly is in the closed position, and the valve plug compresses the second elastic member to block the outlet; when the coil is powered off, the magnetic core assembly is in the open position, and the second elastic piece pushes the valve plug by utilizing self elastic force so that the inlet and the outlet are communicated.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic view of a structure in which an inlet and an outlet of a solenoid valve according to an embodiment of the utility model are communicated.

Fig. 2 is a schematic view of the structure of the solenoid valve according to the embodiment of the utility model with the inlet and outlet broken.

Fig. 3 is an exploded view of a solenoid valve according to an embodiment of the utility model.

FIG. 4 is a schematic illustration of an assembly of a valve plug and a sealing ring of a solenoid valve according to an embodiment of the utility model.

Fig. 5 is a schematic structural view of a seal ring of a solenoid valve according to an embodiment of the utility model.

Fig. 6 is a schematic structural view of a plug body of a solenoid valve according to an embodiment of the utility model.

Fig. 7 is a schematic structural view of a valve body of a solenoid valve according to an embodiment of the utility model.

Fig. 8 is a schematic assembly view of a push rod, sleeve and gasket of a solenoid valve according to an embodiment of the utility model.

Reference numerals:

a solenoid valve 1;

a valve housing 100; a receiving chamber 110; an inlet 120; an outlet 130; a valve body 140; a valve seat 150; a core cover 160;

a valve plug 200; a valve chamber 210; a first flow channel 220; ring groove 230; a third flow channel 240; a plug body 250; a pressure relief channel 251; a pressure relief piece 260; a pressure relief hole 261; a circumferential edge 262;

a magnetic core assembly 300; a sleeve 310; a gasket 320; a movable magnetic core 330; a push rod 340; a first elastic member 350;

a seal ring 400; a second flow path 410; notch 420; end face 430; and a second elastic member 500.

Detailed Description

Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, "plurality" means two or more.

The solenoid valve 1 according to an embodiment of the present utility model is described below with reference to the drawings.

As shown in fig. 1 to 8, the solenoid valve 1 according to the embodiment of the present utility model includes a valve housing 100, a valve plug 200, a magnetic core assembly 300, and a sealing ring 400.

The valve housing 100 is constructed with a receiving chamber 110, an inlet 120 and an outlet 130, the valve plug 200 is movably disposed in the receiving chamber 110 and is constructed with a first flow passage 220, one end of the valve plug 200 facing away from the outlet 130 is provided with a valve cavity 210, the valve cavity 210 is communicated with the outlet 130 through the first flow passage 220, the core assembly 300 is movably disposed in the valve housing 100 between an open position and a closed position, the inlet 120 and the outlet 130 are communicated when the core assembly 300 is in the open position, the first flow passage 220 and the valve cavity 210 are disconnected when the core assembly 300 is in the closed position, and the valve plug 200 is driven to disconnect the inlet 120 and the outlet 130, the sealing ring 400 is disposed between an inner circumferential surface of the receiving chamber 110 and an outer circumferential surface of the valve plug 200, and the sealing ring 400 can be used to fill a gap between the inner circumferential surface of the receiving chamber 110 and the outer circumferential surface of the valve plug 200 to reduce a gap area between the inner circumferential surface of the receiving chamber 110 and the outer circumferential surface of the valve plug 200. Wherein the sealing ring 400 has a notch 420 to form a second flow passage 410, and the valve cavity 210 communicates with the inlet 120 through the second flow passage 410 when the magnetic core assembly 300 is in the closed position.

For example, the solenoid valve 1 may be used in an air conditioning system for controlling a refrigerant medium in the air conditioning system. Also, there may be a clearance fit between the valve plug 200 and the receiving chamber 110.

According to the solenoid valve 1 of the embodiment of the utility model, by constructing the housing chamber 110, the inlet 120 and the outlet 130 in the valve housing 100, the valve plug 200 is movably disposed in the housing chamber 110, the core assembly 300 is movably disposed in the valve housing 100 between an open position, in which the inlet 120 and the outlet 130 are in communication, and a closed position, in which the core assembly 300 drives the valve plug 200 to disconnect the inlet 120 and the outlet 130.

For example, when the magnetic core assembly 300 is in the open position, the valve plug 200 may not block the outlet 130, and the inlet 120 and the outlet 130 are communicated, and the solenoid valve 1 is in the open state, at this time, the refrigerant medium in the air conditioning system may flow into the valve housing 100 through the inlet 120 and then flow out of the valve housing 100 through the outlet 130; when the magnetic core assembly 300 is in the closed position, the valve plug 200 can block the outlet 130, the inlet 120 and the outlet 130 are disconnected, the electromagnetic valve 1 is in the closed state, and the refrigerant medium in the air conditioning system cannot flow through the electromagnetic valve 1. In this way, the solenoid valve 1 can control the refrigerant medium flow path and whether to flow in the air conditioning system.

In addition, a seal ring 400 is provided between the inner circumferential surface of the accommodation chamber 110 and the outer circumferential surface of the valve plug 200 to fill a gap between the inner circumferential surface of the accommodation chamber 110 and the outer circumferential surface of the valve plug 200. The valve plug 200 and the valve housing 100 may be in clearance fit so that the valve plug 200 moves relative to the valve housing 100, and the sealing ring 400 is provided to seal between the inner circumferential surface of the receiving chamber 110 and the outer circumferential surface of the valve plug 200, thereby preventing refrigerant medium in the air conditioning system from flowing to other parts of the solenoid valve 1 through the clearance between the valve plug 200 and the valve housing 100 when the magnetic core assembly 300 is in the open position, so as to ensure the flow rate between the inlet 120 and the outlet 130.

In addition, the valve plug 200 is configured with a first flow passage 220, the end of the valve plug 200 facing away from the outlet 130 is provided with a valve cavity 210, the valve cavity 210 communicates with the outlet 130 through the first flow passage 220, the sealing ring 400 is provided with a notch 420 to form a second flow passage 410, the valve cavity 210 communicates with the inlet 120 through the second flow passage 410, and the first flow passage 220 and the valve cavity 210 are disconnected when the magnetic core assembly 300 is in the closed position.

When the magnetic core assembly 300 is at the closed position, the communication between the inlet 120 and the outlet 130 is disconnected, the refrigerant medium in the air conditioning system can flow in from the inlet 120 and then flow to the valve cavity 210 through the second flow passage 410, and because the communication between the first flow passage 220 and the valve cavity 210 is disconnected at this time, the refrigerant medium in the valve cavity 210 cannot flow out from the first flow passage 220, and the refrigerant medium is accumulated in the valve cavity 210, so that a pressure difference is formed between the valve cavity 210 and the outlet 130, the closing reliability of the electromagnetic valve 1 is ensured, and in the process of switching the magnetic core assembly 300 from the closed position to the open position, the first flow passage 220 is communicated with the valve cavity 210, and the refrigerant medium in the valve cavity 210 can flow to the outlet 130 through the first flow passage 220 to balance the air pressure between the valve cavity 210 and the outlet 130, so that the electromagnetic valve 1 is opened more rapidly, the response is sensitive, and the energy consumption is reduced.

In this way, the sealing ring 400 ensures that most of the area between the sealing valve plug 200 and the valve housing 100 is sealed, and simultaneously realizes communication between the valve cavity 210 and the outlet 130, so that excessive flow between the inlet 120 and the valve cavity 210 is avoided, the flow between the inlet 120 and the outlet 130 is ensured, and the closing stability of the electromagnetic valve 1 is ensured. And moreover, the notch 420 is arranged on the sealing ring 400, so that the sealing ring 400 is conveniently sleeved on the valve plug 200, the notch 420 can form the second flow passage 410, meanwhile, the deformation space of the sealing ring 400 is reserved, and the disassembly and assembly are more convenient.

Thus, the electromagnetic valve 1 according to the embodiment of the utility model has the advantages of stable switching, sensitive response, low energy consumption, convenient installation of the sealing ring 400 and the like.

According to some embodiments of the present utility model, as shown in fig. 4, the minimum cross-sectional area of the second flow passage 410 is smaller than the minimum cross-sectional area of the first flow passage 220.

In this way, in the process of switching from disconnection to communication between the inlet 120 and the outlet 130, the speed of medium flowing from the valve cavity 210 of the valve plug 200 to the outlet 130 is greater than the speed of medium flowing from the inlet 120 to the valve cavity 210, that is, the pressure of the valve cavity 210 is greater than the pressure of the outlet 130 and is not greater than the pressure of the inlet 120, the pressure in the valve cavity 210 and the pressure of the outlet 130 can reach balance, the pressure of the valve plug 200 in the direction of the outlet 130 is reduced, and an instantaneous pressure difference relationship is realized, so that the communication between the inlet 120 and the outlet 130 is fast, the response is more sensitive, and the energy consumption is effectively reduced.

According to some embodiments of the present utility model, as shown in fig. 5, the second flow channel 410 breaks the seal ring 400 in the circumferential direction of the seal ring 400, and the seal ring 400 has end surfaces 430 on opposite sides of the second flow channel 410, and the end surfaces 430 are disposed obliquely to the axial direction of the seal ring 400, i.e., the extending direction of the second flow channel 410 is disposed obliquely to the axial direction of the seal ring 400.

In this way, the sealing ring 400 is completely disconnected in the circumferential direction, the sealing ring 400 is more convenient to be mounted on the valve plug 200, and the second flow passage 410 is an oblique cut, so that the speed of medium flowing into the valve cavity 210 from the inlet 120 can be further slowed, the pressure of the valve cavity 210 is more effectively ensured to be greater than the pressure of the outlet 130 and not greater than the pressure of the inlet 120, and the communication speed between the inlet 120 and the outlet 130 is faster.

According to some embodiments of the present utility model, as shown in fig. 4 and 6, the outer circumferential surface of the valve plug 200 is provided with the ring groove 230, and the sealing ring 400 is mounted to the ring groove 230, so that the positioning between the sealing ring 400 and the valve plug 200 is reliable. Moreover, the sealing ring 400 is in interference fit with the inner peripheral surface of the accommodating cavity 110, wherein the difference between the outer diameter of the sealing ring 400 and the inner diameter of the accommodating cavity 110 is within 1mm, so that elastic stress can be generated when the sealing ring 400 contacts with the inner peripheral surface of the accommodating cavity 110 to ensure that the sealing ring and the inner peripheral surface of the accommodating cavity 110 are elastically sealed, and the sealing effect is improved.

According to some embodiments of the present utility model, as shown in fig. 4 and 6, a valve chamber 210 is formed at the valve plug 200, and an end of the valve chamber 210 facing away from the outlet 130 is opened to communicate with the second flow passage 410. The end of the valve cavity 210 facing away from the outlet 130 communicates with the accommodating chamber 110, and the second flow passage 410 communicates with the accommodating chamber 110, so that communication between the valve cavity 210 and the second flow passage 410 is realized, and thus, the valve plug 200 has a simple structure, is convenient to process, and has lower production cost.

According to some embodiments of the present utility model, as shown in fig. 4 and 6, the first flow passage 220 penetrates the valve plug 200 in the axial direction of the valve plug 200, the valve cavity 210 surrounds the first flow passage 220, and an end of the valve cavity 210 facing away from the outlet 130 communicates with an end of the first flow passage 220 facing away from the outlet 130.

The end of the valve cavity 210 opposite to the outlet 130 is communicated with the accommodating cavity 110, and the end of the first flow channel 220 opposite to the outlet 130 is communicated with the accommodating cavity 110, so that the communication between the valve cavity 210 and the first flow channel 220 is realized, and thus, the valve plug 200 has a simple structure, is convenient to process, and has lower production cost.

According to some embodiments of the present utility model, as shown in FIG. 3, the valve plug 200 is further configured with a third flow passage 240, and the valve cavity 210 communicates with the inlet 120 through the third flow passage 240, the second flow passage 410; wherein the sum of the minimum cross-sectional area of the second flow channel 410 and the minimum cross-sectional area of the third flow channel 240 is smaller than the minimum cross-sectional area of the first flow channel 220.

Thus, in switching from off to on between the inlet 120 and the outlet 130, the velocity of the medium flowing from the valve chamber 210 of the valve plug 200 to the outlet 130 is greater than the velocity of the medium flowing from the inlet 120 to the valve chamber 210, that is, the pressure of the valve chamber 210 is greater than the pressure of the outlet 130 and not greater than the pressure of the inlet 120, the pressure in the valve chamber 210 and the pressure of the outlet 130 can be balanced, the pressure of the valve plug 200 in the direction of the outlet 130 is reduced, and the instant pressure difference relationship is realized, so that the communication between the inlet 120 and the outlet 130 is fast.

In addition, the communication modes between the valve cavity 210 and the inlet 120 are more various, the redundancy is high, the maintenance cost of the electromagnetic valve 1 is reduced, and the flow rate of the electromagnetic valve 1 is larger.

According to some embodiments of the present utility model, as shown in fig. 3, the third flow passage 240 is formed at the outer circumferential wall of the valve plug 200, the inlet 120 is formed at the circumferential wall of the receiving chamber 110, and the third flow passage 240 is located between the inlet 120 and the sealing ring 400 in the axial direction of the valve housing 100.

In this way, the seal ring 400 does not affect communication between the third flow passage 240 and the inlet 120, and the distance between the inlet 120 and the third flow passage 240 is closer, increasing the flow rate of the medium between the inlet 120 and the third flow passage 240.

According to some embodiments of the present utility model, as shown in FIGS. 1-4, a valve plug 200 includes a plug body 250 and a relief piece 260.

The plug body 250 is movably disposed in the accommodating cavity 110, the third flow channel 240 and the valve cavity 210 are configured in the plug body 250, the plug body 250 is further configured with a pressure relief channel 251 passing therethrough, the valve cavity 210 surrounds the pressure relief channel 251, the sealing ring 400 is disposed between the inner circumferential surface of the accommodating cavity 110 and the outer circumferential surface of the plug body 250, the pressure relief member 260 is mounted at one end of the plug body 250 facing away from the outlet 130 and covers the pressure relief channel 251, the pressure relief member 260 is configured with at least one pressure relief hole 261, and the pressure relief hole 261 is communicated with the pressure relief channel 251 to form the first flow channel 220.

When the magnetic core assembly 300 is in the closed position, the magnetic core assembly is stopped against the pressure release member 260 to block the pressure release hole 261, the valve cavity 210 and the first flow passage 220 are disconnected, and the electromagnetic force is used to drive the valve plug 200 to move to block the outlet 130, so as to control the disconnection between the inlet 120 and the outlet 130.

For example, the pressure release member 260 is sleeved on the inner peripheral wall of the valve cavity 210, and the pressure release member 260 is in interference fit with the inner peripheral wall of the valve cavity 210, a side surface of the pressure release member 260 facing the magnetic core assembly 300 has a ring edge 262 surrounding the pressure release hole 261, and when the coil is energized, the magnetic core assembly 300 is abutted against the ring edge 262 to form a more reliable seal for the pressure release hole 261.

In addition, the plug 250 may be made of metal, plastic or composite material, and the pressure release member 260 may be made of metal, plastic or composite material. And, the magnetic core assembly 300 is stopped against the pressure release member 260, and when the pressure release hole 261 is blocked, the valve cavity 210 and the first flow passage 220 are disconnected from each other.

By dividing the valve plug 200 into the plug body 250 and the pressure relief piece 260, the pressure relief channel 251 can be cylindrical, the inner diameter of the pressure relief channel 251 can be larger than the diameter of the pressure relief hole 261, and the plug body 250 and the pressure relief piece 260 are simpler to process respectively, so that the production of the valve plug 200 is more efficient.

According to some embodiments of the present utility model, as shown in fig. 1-4 and 8, a sleeve 310 and a gasket 320 are installed at an end of the magnetic core assembly 300 facing the pressure relief piece 260, and the sleeve 310 mounts the gasket 320 to the magnetic core assembly 300. When the magnetic core assembly 300 is in the closed position, the sealing pad 320 is abutted against the pressure release member 260 to seal the pressure release hole 261.

Thus, on one hand, noise generated when the magnetic core assembly 300 contacts the pressure release member 260 can be reduced, and on the other hand, when the magnetic core assembly 300 and the pressure release member 260 are mutually stopped, the sealing gasket 320 can deform to be more attached to the pressure release member 260, so that the sealing effect of the magnetic core assembly 300 on the pressure release member 260 is better.

According to some embodiments of the present utility model, as shown in fig. 1-4, the magnetic core assembly 300 includes a moving magnetic core 330, a push rod 340, and a first elastic member 350.

The moving core 330 is movably disposed in the valve housing 100, the push rod 340 is connected to the moving core 330, and the first elastic member 350 is disposed between the push rod 340 and the valve housing 100. When the coil is energized, the movable magnetic core 330 is magnetically attracted, so that the magnetic core assembly 300 moves from the open position to the closed position, that is, the movable magnetic core 330 moves toward the valve plug 200, the valve plug 200 is driven by the push rod 340 to move, so that the inlet 120 and the outlet 130 are disconnected, and the push rod 340 compresses the first elastic member 350; when the coil is de-energized, the first elastic member 350 drives the magnetic core 330 to move away from the valve plug 200 by the push rod 340 through its own elastic force, so as to move the magnetic core assembly 300 from the closed position to the open position.

For example, the valve housing 100 may be made of a magnetic material, and the magnetic portion of the valve housing 100 and the magnetic core 330 magnetically attract each other when the coil is energized, or the static magnetic core is installed in the valve housing 100, and the static magnetic core and the magnetic core 330 magnetically attract each other when the coil is energized.

Thus, by the arrangement of the movable magnetic core 330, when the coil is energized, the movable magnetic core 330 pushes the push rod 340 to stop against the valve plug 200 to drive the valve plug 200 to block the outlet 130, and at this time, the push rod 340 compresses the first elastic member 350, and the first elastic member 350 may be a spring.

Through the setting of first elastic component 350, can promote push rod 340 through self elasticity when the coil outage to drive movable magnetic core 330 and remove to the direction that keeps away from valve plug 200, push rod 340 and valve plug 200 separate this moment, first flow path 220 and valve pocket 210 intercommunication, and at next coil circular telegram, make movable magnetic core 330 have the activity space, realize the repeatedly used of solenoid valve 1.

According to some embodiments of the present utility model, as shown in fig. 1-4, valve housing 100 includes a valve body 140, a valve seat 150, and a core housing 160.

The accommodating cavity 110 and the inlet 120 are configured on the valve body 140, the accommodating cavity 110 penetrates through the valve body 140, the valve seat 150 is connected with one end of the valve body 140, the outlet 130 is configured on the valve seat 150, a second elastic piece 500 is arranged between the valve seat 150 and the valve plug 200, the second elastic piece 500 can be a spring, the magnetic core cover 160 is connected with the other end of the valve body 140, the movable magnetic core 330 is movably arranged on the magnetic core cover 160, and the push rod 340 extends into the accommodating cavity 110.

Wherein when the coil is energized, the magnetic core assembly 300 is in the closed position, and the valve plug 200 compresses the second elastic member 500 to block the outlet 130; when the coil is de-energized, the magnetic core assembly 300 is in the open position, and the second elastic member 500 pushes the valve plug 200 by its own elastic force to open the outlet 130, thereby controlling the communication between the inlet 120 and the outlet 130.

For example, the valve body 140 may have magnetism, and when the coil is energized, a magnetic attraction force is generated between the valve body 140 and the moving core 330.

By providing the valve housing 100 as a separate body of the valve body 140, the valve seat 150 and the core cover 160, the difficulty of processing the valve housing 100 is reduced. And the magnetic core assembly 300, the valve plug 200, the first elastic member 350 and the second elastic member 500 are firstly installed on the valve body 140 and the magnetic core cover 160, and then the valve seat 150 and the valve body 140 are connected to realize the assembly of the electromagnetic valve 1, wherein the valve seat 150 and the valve body 140 are detachably connected, so that the subsequent maintenance is convenient.

Other constructions and operations of the solenoid valve 1 according to the embodiment of the present utility model are known to those skilled in the art and will not be described in detail herein.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. A solenoid valve, comprising:

a valve housing configured with a receiving cavity, an inlet and an outlet;

the valve plug is movably arranged in the accommodating cavity and is provided with a first flow passage, one end of the valve plug, which is opposite to the outlet, is provided with a valve cavity, and the valve cavity is communicated with the outlet through the first flow passage;

the magnetic core assembly is movably arranged in the valve housing between an opening position and a closing position, the inlet and the outlet are communicated when the magnetic core assembly is in the opening position, the first flow passage and the valve cavity are disconnected when the magnetic core assembly is in the closing position, and the valve plug is driven to disconnect the inlet from the outlet;

a seal ring provided between an inner peripheral surface of the accommodation chamber and an outer peripheral surface of the valve plug;

the sealing ring is provided with a notch to form a second flow passage, and the valve cavity is communicated with the inlet through the second flow passage when the magnetic core assembly is positioned at the closing position.

2. The solenoid valve of claim 1 wherein the minimum cross-sectional area of the second flow passage is less than the minimum cross-sectional area of the first flow passage.

3. The electromagnetic valve according to claim 1, wherein the second flow passage breaks the seal ring in a circumferential direction of the seal ring, the seal ring having end surfaces on opposite sides of the second flow passage, the end surfaces being disposed obliquely to an axial direction of the seal ring.

4. The electromagnetic valve according to claim 1, wherein an annular groove is provided on an outer peripheral surface of the valve plug, the seal ring is mounted to the annular groove, and the seal ring is in interference fit with an inner peripheral surface of the accommodating chamber.

5. The solenoid valve of claim 1 wherein said valve cavity is formed in said valve plug with an end of said valve cavity facing away from said outlet opening to communicate with said second flow passage.

6. The solenoid valve of claim 5 wherein said first flow passage extends axially through said valve plug, said valve cavity surrounds said first flow passage, and an end of said valve cavity facing away from said outlet communicates with an end of said first flow passage facing away from said outlet.

7. The solenoid valve of claim 1 wherein said valve plug is further configured with a third flow passage through which said valve cavity communicates with said inlet;

wherein the sum of the smallest cross-sectional area of the second flow channel and the smallest cross-sectional area of the third flow channel is smaller than the smallest cross-sectional area of the first flow channel.

8. The solenoid valve of claim 7 wherein said third flow passage is formed in an outer peripheral wall of said valve plug, said inlet is formed in a peripheral wall of said receiving chamber, and said third flow passage is located axially of said valve housing between said inlet and said sealing ring.

9. The solenoid valve of claim 7, wherein the valve plug comprises:

the plug body is movably arranged in the accommodating cavity, the third flow passage and the valve cavity are formed in the plug body, the plug body is also provided with a pressure release channel penetrating through the plug body, the valve cavity surrounds the pressure release channel, and the sealing ring is arranged between the inner peripheral surface of the accommodating cavity and the outer peripheral surface of the plug body;

the pressure release piece is arranged at one end of the plug body, which is opposite to the outlet, and covers the pressure release channel, the pressure release piece is provided with at least one pressure release hole, and the pressure release hole is communicated with the pressure release channel to form the first flow channel;

the magnetic core assembly is abutted to the pressure release piece when being in the closing position, the pressure release hole is blocked, and the valve cavity is disconnected from the first flow channel.

10. The solenoid valve of claim 9 wherein an end of said magnetic core assembly facing said pressure relief member is fitted with a sleeve and a gasket, said sleeve fitting a gasket to said magnetic core assembly;

when the magnetic core component is in the closing position, the sealing gasket is abutted against the pressure release piece to seal the pressure release hole.

11. The solenoid valve of claim 1 wherein said magnetic core assembly comprises:

the movable magnetic core is movably arranged on the valve housing;

the push rod is connected with the movable magnetic core;

the first elastic piece is arranged between the push rod and the valve housing;

wherein when the coil is energized, the movable magnetic core is magnetically attracted to move the magnetic core assembly from the open position to the closed position, the pushrod compresses the first elastic member and drives the valve plug to disconnect the inlet and the outlet;

when the coil is powered off, the first elastic piece passes through the push rod by utilizing self elastic force so as to enable the magnetic core assembly to move from the closed position to the open position.

12. The solenoid valve of claim 11 wherein said valve housing comprises:

the accommodating cavity and the inlet are formed in the valve body, and the accommodating cavity penetrates through the valve body;

the valve seat is connected with one end of the valve body, the outlet is formed in the valve seat, and a second elastic piece is arranged between the valve seat and the valve plug;

the magnetic core cover is connected with the other end of the valve body, the movable magnetic core is movably arranged on the magnetic core cover, and the push rod stretches into the accommodating cavity;

wherein when the coil is energized, the magnetic core assembly is in the closed position, and the valve plug compresses the second elastic member;

when the coil is powered off, the magnetic core assembly is in the open position, and the second elastic piece pushes the valve plug by utilizing self elastic force so that the inlet and the outlet are communicated.