Valve body of electromagnetic valve

Abstract

The application provides a valve body of an electromagnetic valve, a valve core channel and one or more medium channels are arranged in the valve cavity of the valve body; the end of the medium channel and the end of the valve core channel are communicated; the valve core is arranged in the valve core channel; the medium channel is used for guiding medium; one magnetic pole of two or more permanent magnets is arranged around the valve core channel; the polarity of the one magnetic pole of the two or more permanent magnets is the same; the other magnetic pole of the two or more permanent magnets is connected with the first valve seat and the second valve seat; the two or more permanent magnets generate repulsion to the valve core so that the valve core is balanced in the valve core channel; by arranging the medium channel, the medium entering the valve cavity is prevented from entering the valve core channel and interfering with the valve core; the valve core is prevented from irregularly moving in the valve cavity under the pushing of the medium and from colliding with the inner wall surface of the valve cavity and the valve core channel, so that the noise of the electromagnetic valve is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electromagnetic valve, in particular to a valve body of electromagnetic valve. BACKGROUND

[0002] The reversing control valve bistable electric valve for refrigerant circulation system combines electromagnetic valve with permanent magnet to change the working position of the spool by the electromagnetic force generated by pulse current to realize the conversion of two working states, and the spool is kept in the corresponding working position by the magnetic force of the permanent magnet to maintain the working state.

[0003] The patent literature with the patent number CN200510060211.5 and the publication date of 2007.1.31 discloses a bistable electromagnetic valve, which comprises a valve body component and a control coil, the valve body component has a spool cavity, an inlet and two outlets are arranged in communication with the spool cavity, a valve core is arranged in the spool cavity, the position of the valve core is changed by the control coil to selectively seal the two outlets, and a magnetic ball valve core is kept in the corresponding sealing position by the permanent magnet.

[0004] However, the magnetic force between the two oppositely arranged fan ring magnets cannot keep the spool balanced, the spool cannot be kept balanced, and the spool produces irregular motion when moving,

[0005] The spool is easy to wear when moving in contact with the inner wall of the spacer sleeve, and noise is generated when the spool moves in contact with the inner wall of the spacer sleeve. Meanwhile, the inlet is arranged on both sides of the spacer sleeve, and the spool blocks the inlet when moving in contact with the inner wall of the spacer sleeve, thereby affecting the flow of medium in the electromagnetic valve. The medium channel formed by the electromagnetic valve is only located on the outer peripheral surface of the spool, and the medium entering the electromagnetic valve will all enter the spool cavity. Since the spool is a moving part during operation, the spool is easy to produce irregular motion under the action of the medium thrust, and the spool will impact the inner wall of the spacer sleeve to generate noise. SUMMARY

[0006] The present application provides a valve body of electromagnetic valve, which forms a medium channel in the valve cavity for guiding medium, avoids the interference of medium on the spool in the spool channel, avoids irregular motion of the spool caused by the medium, keeps the spool balanced in the spool channel by the repulsive force generated between the permanent magnets, and reduces noise.

[0007] To achieve the above object, the technical scheme of the present application is: a valve body of an electromagnetic valve, comprising a valve cavity, a first valve seat arranged at one end of the valve cavity, a second valve seat arranged at the other end of the valve cavity, a valve core and two or more permanent magnets arranged in the valve cavity, the two or more permanent magnets being arranged around the valve core along the axial direction of the valve cavity, a coil arranged outside the valve body, a valve core channel and one or more medium channels arranged in the valve cavity; the valve core channel and the medium channel are arranged in parallel along the axial direction of the valve cavity, the first valve seat is provided with a first cavity at the end close to the valve core channel, the second valve seat is provided with a second cavity at the end close to the valve core channel, the medium channel and the valve core channel are communicated through the first cavity and the second cavity; the valve core is arranged in the valve core channel; the medium channel is used for guiding the medium; each of the two or more permanent magnets is sequentially provided with a magnetic pole and another magnetic pole along the radial direction of the valve body, the magnetic pole of the two or more permanent magnets is arranged around the valve core channel and has the same polarity, the magnetic pole of the two or more permanent magnets generates a repulsive force on the valve core to keep the valve core balanced in the radial direction of the valve core channel; the other magnetic pole of the two or more permanent magnets is connected with the first valve seat and the second valve seat; the magnetic pole of the two or more permanent magnets is not connected with the first valve seat and the second valve seat; the magnetized first valve seat and second valve seat generate a repulsive force and an attractive force on the valve core to keep the valve core in an attractive stable state with the first valve seat or the second valve seat in the valve core channel.

[0008] The above arrangement is that the medium entering the valve cavity flows along the medium channel, the medium channel is arranged to avoid the medium interfering with the valve core in the valve core channel, and to avoid the valve core moving irregularly in the valve cavity under the pushing action of the medium and colliding with the inner wall of the valve cavity and the valve core channel, thereby effectively reducing the noise of the electromagnetic valve. The one or more medium channels play a role in flow distribution, thereby increasing the flow of the medium.

[0009] All the permanent magnets include two magnetic poles arranged along the radial direction of the valve body, and the magnetic pole is arranged along the valve core channel, the magnetic pole of the two or more permanent magnets has the same polarity, thereby generating a repulsive force to keep the valve core balanced in the radial direction of the valve core channel, preventing the valve core from colliding with the valve core channel, and further reducing the noise of the electromagnetic valve, while the other magnetic pole of the two permanent magnets is connected with the first valve seat and the second valve seat, when the coil outside the valve body is electrified, different magnetic fields are generated under the action of different direction currents, and the first valve seat and the second valve seat are magnetized; under the action of the current in one direction, the first valve seat adsorbs the valve core, and the second valve seat repels the valve core; under the action of the current in the opposite direction, the second valve seat adsorbs the valve core, and the first valve seat repels the valve core; the valve core moves along the axial direction of the valve core channel.

[0010] The first cavity and the second cavity are arranged to store the medium and avoid magnetic shunt phenomenon; when the external medium flows into the valve cavity, the medium in the first cavity and the second cavity is pushed to flow, so that the spool moves without affecting the medium flow.

[0011] Further, the valve cavity is provided with a support, the spool channel and the one or more medium channels are formed through the support in the axial direction of the support; the two or more permanent magnets are arranged on the outer wall of the support. The support is arranged to fix the permanent magnets.

[0012] Further, the medium channel is provided with two or more, and the two or more medium channels are evenly distributed in the circumferential direction of the support.

[0013] The above arrangement, the pressure of the medium acting on the support is evenly distributed in the circumferential direction of the support, and the pressure balance of the support in the circumferential direction.

[0014] Further, the support includes a bracket sleeve, the outer wall of the bracket sleeve extends outwardly and has two or more support portions, the spool channel is formed through the bracket sleeve, the medium channel is formed through the support portion, the extension direction of the medium channel is the same as the extension direction of the spool channel, and the permanent magnet is installed on the outer wall of the bracket sleeve and located between the two support portions.

[0015] The above arrangement, by forming the spool channel on the bracket sleeve and forming the medium channel on the support portion, the spool channel and the medium channel are separated, so that the movement of the spool is not interfered by the medium.

[0016] Further, the spool is a spherical spool or a cylindrical spool, the first valve seat is provided with a first groove matched with the spool at one end close to the spool, the second valve seat is provided with a second groove matched with the spool at one end close to the spool, and the spool is used to block the first valve seat or the second valve seat.

[0017] The above arrangement, by arranging the first groove and the second groove matched with the spherical spool or the cylindrical spool, the first groove and the second groove are well matched with the spool, so that the sealing performance of the valve body is good. At the same time, the structure of the spherical spool is simple and the manufacturing cost is low.

[0018] Further, the spool includes a sealing element, a magnet is wrapped on the side surface of the sealing element, the end of the magnet is flush with the end of the sealing element, and the spool is used to block the first valve seat or the second valve seat.

[0019] The above arrangement, the magnet is arranged on the side surface of the sealing element, one pole of the permanent magnet can act on the magnet, thereby generating a repulsive force on the spool, and the spool is balanced in the radial direction of the spool channel. The sealing element is used to block the first valve seat or the second valve seat, and the sealing performance of the valve body is good.

[0020] Further, the first valve seat comprises a first outlet and an inlet, and the second valve seat comprises a second outlet; the first outlet and the second outlet extend into the spool channel.

[0021] The above arrangement, the inlet is used for injecting medium, the medium enters into the valve cavity and then flows out through the first outlet or the second outlet. Meanwhile, the first outlet and the second outlet extend into the spool channel, the distance between the first outlet and the spool, and the distance between the second outlet and the spool are short, the moving distance of the spool is short, and the spool can move quickly between the first outlet and the second outlet.

[0022] Further, the cross-sectional area of the medium channel is smaller than the cross-sectional area of the inlet.

[0023] Further, the valve cavity is a circular tube-shaped valve cavity; and the end surface of the permanent magnet is fan-shaped.

[0024] Further, the distance between the end surface of the first cavity and the end surface of the second cavity and the axial end surface of the permanent magnet is greater than 0.3mm. In this way, the medium can flow easily. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic view of the present application.

[0026] Figure 2 It is an exploded view of the first embodiment of the present application.

[0027] Figure 3 It is a sectional view of the first embodiment of the present application.

[0028] Figure 4 It is a sectional view of the first embodiment of the present application after removing the support, the permanent magnet and the spool.

[0029] Figure 5 It is a perspective view of the second valve seat in the first embodiment of the present application.

[0030] Figure 6 It is a perspective view of the first valve seat in the first embodiment of the present application.

[0031] Figure 7 It is a perspective view of the support in the present application.

[0032] Figure 8 It is a schematic view of the electromagnetic valve using the present application.

[0033] Figure 9 It is a sectional view of the electromagnetic valve using the first embodiment of the present application.

[0034] Figure 10 It is a sectional view of the second embodiment of the present application.

[0035] Figure 11 It is a perspective view of the spool in the second embodiment of the present application. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0037] Example 1

[0038] like Figures 1-9 As shown, a solenoid valve body 1 includes a cylindrical sleeve 11, a first valve seat 12, a second valve seat 13, a bracket 14, a valve core 15, and two or more permanent magnets 16. The first valve seat 12 is disposed at one end of the sleeve 11 and is sealed to the sleeve 11. The second valve seat 13 is disposed at the other end of the sleeve 11 and is sealed to the sleeve 11. A valve cavity 17 is formed between the first valve seat 12 and the second valve seat 13. The bracket 14 is disposed within the valve cavity 17. Two or more fan-shaped permanent magnets 16 are disposed on the outer wall of the bracket 14. The bracket is made of a non-magnetic material; in this embodiment, the bracket is a plastic bracket.

[0039] A valve core channel 141 and two or more medium channels 142 are formed through the support 14 along its axial direction; both the valve core channel 141 and the medium channels 142 are used to guide the medium. The valve core channel 141 coincides with the axis of the support 14; the valve core channel 141 and the medium channels 142 are arranged parallel to each other along the axial direction of the valve cavity 17. The two or more medium channels 142 are evenly distributed along the circumference of the support 14. The pressure of the medium acting on the support 14 is evenly distributed along the circumference of the support 14, and the pressure on the support 14 is balanced. Two or more permanent magnets 16 are arranged around the valve core 15 along the axial direction of the valve cavity 17. The first valve seat 12 has a first cavity 121 at one end near the valve core channel 141, and the second valve seat 13 has a second cavity 131 at one end near the valve core channel 141. In the embodiment, the distance between the end face of the first cavity and the end face of the second cavity and the axial end face of the permanent magnet is greater than 0.3 mm. The medium channel 142 and the valve core channel 141 are connected by the first cavity 121 and the second cavity 131; the first cavity 121 and the second cavity 131 are set to store the medium; when the external medium flows into the valve cavity 17, it will push the medium in the first cavity 121 and the second cavity 131 to flow, so that the movement of the valve core does not affect the flow of the medium.

[0040] The valve core 15 is disposed in the valve core channel 141; the medium channel 142 is used to guide the medium. The medium entering the valve chamber 17 flows along the medium channel 142. By setting the medium channel 142, interference of the medium with the valve core in the valve core channel is avoided; irregular movement of the valve core 15 in the valve chamber 17 under the pushing action of the medium is avoided, which would lead to the valve chamber 17 colliding with the inner wall of the valve core channel 141. This effectively reduces the noise of the solenoid valve.

[0041] Meanwhile, the more than one medium channels play a role of flow distribution, so that the flow of the medium can be increased.

[0042] In the embodiment, two permanent magnets 16 are provided. All the permanent magnets 16 are provided with one magnetic pole and another magnetic pole in sequence along the radial direction of the valve body 1, the one magnetic pole of the more than two permanent magnets is arranged around the spool channel 141, and the polarity of the one magnetic pole of the two permanent magnets 16 is the same, the one magnetic pole of the two permanent magnets 16 generates repulsion to the spool 15, so that the spool 15 is balanced in the radial direction of the spool channel 141. The spool is prevented from impacting the spool channel.

[0043] The other magnetic pole of the two permanent magnets 16 is connected with the first valve seat 12 and the second valve seat 13, and the one magnetic pole of the more than two permanent magnets is not connected with the first valve seat and the second valve seat. In the embodiment, the N pole of the two permanent magnets 16 is arranged around the spool channel 141, and the S pole of the two permanent magnets 16 is connected with the first valve seat 12 and the second valve seat 13.

[0044] The bracket 14 comprises a bracket sleeve 143, the outer wall of the bracket sleeve 143 extends outwardly with more than two supporting portions 144, the spool channel 141 is formed through the sleeve 11, the medium channel 142 is formed through the supporting portion 144, the extension direction of the medium channel 142 is the same as the extension direction of the spool channel 41, and the permanent magnet 16 is installed on the outer wall of the bracket sleeve 143 and located between the two supporting portions 144. By forming the spool channel 141 on the bracket sleeve 143 and forming the medium channel 142 on the supporting portion 144, the spool channel 141 and the medium channel 142 are separated, so that the movement of the spool is not interfered by the medium.

[0045] The first valve seat 12 comprises a first outlet 123 and an inlet 122, and the second valve seat 13 comprises a second outlet 132; the first outlet 123 and the second outlet 132 extend into the valve core channel 141. The valve core 15 is a spherical valve core 15 or a cylindrical valve core; in this embodiment, the valve core 15 is a spherical valve core, and the cross-sectional area of the medium channel 142 is smaller than that of the inlet 122. The first valve seat 12 is provided with a first groove 124 near one end of the valve core 15, which cooperates with the valve core 15; the first groove 124 is in communication with the first outlet 123. The second valve seat 13 is provided with a second groove 133 near one end of the valve core 15, which cooperates with the valve core 15; the second groove 133 is in communication with the second outlet 132; the valve core 15 is used to block the first valve seat 12 or the second valve seat 13. By setting the first groove 124 and the second groove 133 to cooperate with the valve core 15, the first groove 124 and the second groove 133 have good fitting effect with the valve core 15; in this way, the valve body 1 has good sealing performance. Meanwhile, the spherical valve core has simple structure and low manufacturing cost. Meanwhile, the inlet 122 is used to inject medium, which enters the valve cavity 17 and then flows out through the first outlet 123 or the second outlet 132. The first outlet 123 and the second outlet 132 extend into the valve core channel 141, the distance between the first outlet 123 and the valve core 15 and the distance between the second outlet 132 and the valve core 15 are short, the valve core 15 moves a short distance, and the valve core 15 can quickly move between the first outlet 123 and the second outlet 132.

[0046] In use, the valve body 1 is arranged in the coil framework 2, and then the coil 3 is wound on the side of the coil framework 2; then the coil framework 2 wound with the coil 3 is installed in the housing 4 to form the electromagnetic valve. The inlet pipe (not shown in the figure) is connected with the inlet 122, the first outlet pipe (not shown in the figure) is connected with the first outlet 123, and the second outlet pipe (not shown in the figure) is connected with the second outlet 132. In this way, the medium entering the valve cavity 17 from the inlet 122 can flow to the first outlet pipe through the first outlet 123 and then flow out, or flow to the second outlet pipe through the second outlet 132 and then flow out. In this embodiment, the medium is refrigerant.

[0047] In use, under the action of current in different directions, different magnetic fields are generated to magnetize the first valve seat 12 and the second valve seat 13; the magnetized first valve seat 12 or the second valve seat 13 attracts or repels the valve core 15 to make the valve core 15 move along the axial direction of the valve core channel; meanwhile, the N poles of the two or more permanent magnets 16 are arranged around the valve core channel 141; the N poles of the two or more permanent magnets 16 generate repulsive force on the valve core 15 to keep the valve core 15 balanced in the radial direction of the valve core channel 141; when the valve core 15 moves, the valve core 15 performs regulated motion in the valve core channel 141 under the action of the repulsive force and the attractive force, and the valve core 15 does not contact the inner wall surface of the valve core channel 141; the noise of the electromagnetic valve is further reduced.

[0048] Specifically, under the action of current in one direction; the first valve seat 12 and the second valve seat 13 are magnetized, the first valve seat 12 adsorbs the valve core 15, and the second valve seat 13 repels the valve core; under the action of current in the opposite direction; the first valve seat 12 and the second valve seat 13 are magnetized, the second valve seat 13 adsorbs the valve core 15, and the first valve seat 12 repels the valve core. When the valve core needs to approach the first valve seat 12; under the action of current in one direction, the S pole of the permanent magnet and the coil 3 form the S pole of the magnetic field to magnetize the first valve seat 12, so that the first valve seat 12 generates an attractive force on the valve core 15, thereby adsorbing the valve core 15 to move towards the first valve seat 15; at the same time, the N pole of the magnetic field formed by the coil 3 will also magnetize the second valve seat 13, so that the second valve seat 13 generates a repulsive force on the valve core 15; thereby pushing the valve core 15 to move towards the first valve seat 15; so that the valve core 151 and the first first valve seat 12 maintain a stable state of attraction.

[0049] Example two

[0050] As shown in Figures 10-11 ; the difference between this embodiment and example one is that the end of the first valve seat 12 close to the valve core 15 is a flat surface; the end of the second valve seat 13 close to the valve core 15 is also a flat surface; the valve core 15 includes a sealing element 151, and a magnet 152 is wrapped around the side of the sealing element 151; the end of the magnet 152 is flush with the end of the sealing element 151; the valve core 15 is used to block the first valve seat 12 or the second valve seat 13. In this embodiment, the sealing element 151 is a rubber sealing element. The magnet is arranged on the side of the sealing element, and one pole of the permanent magnet 16 can act on the magnet, thereby generating a repulsive force on the valve core 15; thereby the valve core 15 can maintain balance in the radial direction of the valve core passage 141; the first valve seat 12 or the second valve seat 13 is blocked by the sealing element; the sealing property of the valve body is good.

Claims

1. A valve body of a solenoid valve comprising a valve chamber, a first valve seat provided at one end of the valve chamber, a second valve seat provided at the other end of the valve chamber, a spool provided in the valve chamber, and two or more permanent magnets provided around the spool in the axial direction of the valve chamber, the valve body having a coil provided on the outside thereof, characterized in that: the two or more permanent magnets are arranged in the axial direction of the valve chamber in a manner that the magnetic poles of the permanent magnets are alternately arranged in the axial direction of the valve chamber. The valve cavity is provided with a valve core channel and one or more medium channels; the valve core channel and the medium channel are arranged in parallel along the axial direction of the valve cavity; the first valve seat is provided with a first cavity at the end close to the valve core channel; the second valve seat is provided with a second cavity at the end close to the valve core channel; the medium channel and the valve core channel are communicated through the first cavity and the second cavity; the valve core is arranged in the valve core channel; the medium channel is used for guiding the medium; each of the two or more permanent magnets is sequentially provided with a magnetic pole and another magnetic pole along the radial direction of the valve body; the magnetic poles of the two or more permanent magnets are arranged around the valve core channel and have the same polarity; the magnetic poles of the two or more permanent magnets generate repulsion to the valve core to keep the valve core balanced in the radial direction of the valve core channel; the other magnetic poles of the two or more permanent magnets are connected with the first valve seat and the second valve seat; the magnetic poles of the two or more permanent magnets are not connected with the first valve seat and the second valve seat; the first valve seat and the second valve seat after magnetization generate repulsion and attraction to the valve core to keep the valve core in stable attraction with the first valve seat or the second valve seat in the valve core channel, The valve cavity is provided with a support; the valve core channel and one or more medium channels are formed through the support along the axial direction of the support; the two or more permanent magnets are arranged on the outer wall of the support; the support is provided with a medium channel to separate the valve core channel and the medium channel; the medium channel is formed through a through hole on the support; the other magnetic poles of the two permanent magnets are in abutment with the first valve seat and the second valve seat; the magnetic poles of the two permanent magnets have a gap with the first valve seat and the second valve seat.

2. A valve body for a solenoid valve according to claim 1, wherein: The medium channel is provided with two or more medium channels; the two or more medium channels are uniformly distributed in the circumferential direction of the support.

3. A valve body for a solenoid valve according to claim 1, wherein: The support includes a bracket sleeve; the outer wall of the bracket sleeve extends outwardly and is provided with two or more support portions; the valve core channel is formed through the bracket sleeve; the medium channel is formed through the support portion; the extension direction of the medium channel is the same as the extension direction of the valve core channel; the permanent magnet is mounted on the outer wall of the bracket sleeve and located between the two support portions.

4. A valve body for a solenoid valve according to claim 3, wherein: The valve core is a spherical valve core or a cylindrical valve core; the first valve seat is provided with a first groove at the end close to the valve core; the second valve seat is provided with a second groove at the end close to the valve core; the valve core is used for plugging the first valve seat or the second valve seat.

5. A valve body for a solenoid valve according to claim 3, wherein: The valve core includes a sealing element; the sealing element is covered with a magnet on the side surface; the end of the magnet is flush with the end of the sealing element; the sealing element is used for plugging the first valve seat or the second valve seat.

6. A valve body for a solenoid valve according to claim 1, wherein: The first valve seat includes a first outlet and an inlet; the second valve seat includes a second outlet; the first outlet and the second outlet extend into the valve core channel.

7. A valve body for a solenoid valve according to claim 6, wherein: The cross-sectional area of the medium channel is smaller than the cross-sectional area of the inlet.

8. The valve body of claim 1 wherein: The valve cavity is a circular tube; the end surface of the permanent magnet is fan-shaped.

9. A valve body for a solenoid valve according to claim 1, wherein: The distance between the end surface of the first cavity and the second cavity and the axial end surface of the permanent magnet is greater than 0.3 mm.

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