Three-position five-way electromagnetic valve

Abstract

A valve seat is provided with two mounting seats, the two mounting seats are provided with a first pilot valve and a second pilot valve respectively, a valve element framework is mounted in a valve cavity, a valve element assembly is mounted in the valve element framework and can slide in the valve element framework, and the mounting seats are provided with mounting grooves. The first valve port is communicated with the two installation grooves through a first channel, the installation base is provided with a second through hole and a fifth through hole, the first channel is communicated with the second through hole, the second through hole is communicated with the installation grooves, and the fifth through hole is communicated with the installation grooves and the valve cavity. In the second state, the first pilot valve is powered on, the second pilot valve is powered off, the first valve port is communicated with the second valve port, and the fourth valve port is communicated with the fifth valve port; in the third state, the first pilot valve is powered off, the second pilot valve is powered on, the first valve port is communicated with the fourth valve port, and the second valve port is communicated with the third valve port; the flow direction of a medium is controlled through opening and closing of the two pilot valves, and then communication between the valve ports is switched.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic valves, in particular to a three-position five-way electromagnetic valve. Background Art

[0002] Solenoid valves are industrial equipment controlled by electromagnetics. They are basic automation components used to control fluids. They are actuators and are not limited to hydraulics and pneumatics. They are used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. Common solenoid valves include two-position five-way single-control, two-position five-way double-control and three-position five-way solenoid valves. The common three-position five-way valve has three working positions and five valve ports. When working, the electromagnetically driven valve stem controls the connection or closure of the air inlet and different air outlets, thereby controlling the air path. The existing three-position five-way solenoid valve switches between valve ports by directly driving the valve stem through the solenoid valve. However, when used for high-pressure and high-flow medium, the valve stem is subject to the resistance and impact force of the high-pressure and high-flow medium, resulting in instability of the solenoid valve when driving the valve stem, and leakage is prone to occur at the valve stem seal. Therefore, a technical solution is needed to solve the above problems. Utility Model Content

[0003] In view of the above technical requirements, the utility model provides a three-position five-way solenoid valve.

[0004] The utility model provides a three-position five-way solenoid valve, comprising a valve seat, a mounting seat, a first pilot valve and a second pilot valve, two mounting seats are respectively mounted at both ends of the valve seat, the first pilot valve and the second pilot valve are respectively mounted on the two mounting seats, the valve seat is provided with a first valve port, a second valve port, a third valve port, a fourth valve port, a fifth valve port, and a valve cavity, the valve cavity runs through the valve seat, the first valve port, the second valve port, the third valve port, the fourth valve port, and the fifth valve port are all communicated with the valve cavity, a valve core skeleton is installed in the valve cavity, a valve core assembly is installed in the valve core skeleton, the valve core assembly can slide in the valve core skeleton, the mounting seat is provided with a mounting groove, the valve seat is provided with a first channel, the first channel is communicated with the first valve port, the mounting seat is provided with a first valve port, the first channel is communicated with the first valve port, and the mounting seat is provided with a second valve port. The first through hole and the fifth through hole, the first channel passes through the valve seat and can connect to the second through holes of the two mounting seats, the second through hole connects to the mounting groove, the fifth through hole connects to the mounting groove and the valve cavity, the valve core assembly includes a first state, a second state, and a third state. In the first state, the first pilot valve and the second pilot valve are both powered off, and the valve core assembly blocks all valve ports. In the second state, the first pilot valve is powered on and the second pilot valve is powered off. The valve core assembly is close to the second pilot valve, so that the first valve port is connected to the second valve port, and the fourth valve port is connected to the fifth valve port. In the third state, the first pilot valve is powered off and the second pilot valve is powered on. The valve core assembly is close to the first pilot valve, so that the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port.

[0005] Further, the first pilot valve includes a first moving iron core, and the second pilot valve includes a second moving iron core, a portion of the first moving iron core and a portion of the second moving iron core are both located in the mounting groove of the corresponding mounting seat, in the first state, the first moving iron core and the second moving iron core both block the second through hole of the corresponding mounting seat, in the second state, the first moving iron core is away from the second through hole of the corresponding mounting seat, and then the first channel is connected to the mounting groove of the mounting seat for installing the first pilot valve, and the second moving iron core blocks the second through hole of the corresponding mounting seat, and in the third state, the first moving iron core blocks the second through hole of the corresponding mounting seat, and the second moving iron core is away from the second through hole of the corresponding mounting seat, and then the first channel is connected to the mounting groove of the mounting seat for installing the second pilot valve.

[0006] Furthermore, the valve core skeleton includes a guide member, a plurality of brackets and a plurality of sealing rings, the number of the guide members is two, the two guide members are respectively located at the two ends of the valve cavity, the guide member is sealed and connected to the mounting seats in corresponding directions, the plurality of brackets and the plurality of sealing rings are located between the two guide members, the sealing ring is installed between two adjacent brackets, the brackets located at the two ends are respectively installed with sealing rings between the two guide members, and the sealing rings can press against the outer peripheral wall of the valve core assembly.

[0007] Furthermore, the valve core assembly includes a valve stem and two pistons, slots are provided at both ends of the valve stem, and the two pistons are installed at both ends of the valve stem, a portion of the piston is located in the slot, a portion of the piston is located in the guide member, and a sealing ring is installed on the piston, and the sealing ring presses against the inner wall of the guide member.

[0008] Furthermore, the valve stem includes two small diameter sections, and a space for medium circulation can be formed between the small diameter sections and the sealing ring.

[0009] Furthermore, the piston includes a limit member, a movable member, and a spring, a portion of the spring is located inside the piston, the limit member is fixedly mounted on the piston, the movable member is mounted on the limit member, the movable member can move along the limit member, a portion of the movable member can extend out of the limit member, and the spring presses the movable member toward a mounting seat corresponding to the piston.

[0010] Furthermore, the movable member is provided with a sixth through hole, and the sixth through hole communicates with the inner end surface and the outer end surface of the movable member.

[0011] Furthermore, the limiting member is provided with a stop edge, the movable member is provided with a ring plate, and when the spring presses the movable member to extend to the farthest end of the limiting member, the ring plate presses the stop edge.

[0012] Furthermore, the outer wall of the guide member is provided with an annular groove, the valve seat is provided with a balancing channel, the balancing channel is connected to the annular groove, the sealing ring can divide the interior of the guide member into two parts, and the annular groove is connected to a part of the space inside the guide member away from the mounting seat.

[0013] Furthermore, the mounting seat is provided with a third through hole and a fourth through hole, and the third through hole and the fourth through hole are symmetrically positioned. The side wall of the mounting seat is provided with a second channel inwardly, and the bottom surface of the mounting seat is provided with a third channel and a fourth channel inwardly, the third channel is connected to the third through hole, and the fourth channel is connected to the fourth through hole. The second channel is connected to the second through hole, the third channel, and the fourth channel, and then the second through hole is connected to the third through hole and the fourth through hole, the third through hole of the mounting seat for installing the first pilot valve is connected to the first channel, and the fourth through hole of the mounting seat for installing the second pilot valve is connected to the first channel.

[0014] Compared with the related art, the three-position five-way solenoid valve provided by the utility model has the following beneficial effects:

[0015] 1. The utility model installs two mounting seats at both ends of the valve seat, and the two mounting seats are respectively installed with a first pilot valve and a second pilot valve. The first channel provided on the valve seat can connect the first valve port and the mounting grooves of the two mounting seats, and the mounting grooves are connected with the inside of the guide member through the fifth through hole. When the two pilot valves are not energized, the valve core assembly is located in the middle position of the valve core skeleton, and all the valve ports of the valve seat are not connected to each other. By opening a pilot valve alone, the medium of the first valve port flows to one end of the valve core assembly through channel 1, thereby pushing the valve core assembly to move toward the other end. The medium flowing from the first valve port to the valve seat is opened and closed by two solenoid valves, and the movement of the valve core assembly is driven by the pressure of the medium itself, so that the movement and sealing of the valve core assembly are more stable, thereby realizing the function of switching and connecting between multiple valve ports, and also saving the power consumption required for driving the solenoid valve.

[0016] 2. Pistons are installed at both ends of the valve core assembly in the utility model. The spring installed in the piston cooperates with the movable part that can press the movable part. The movable part is fixed and limited by the limiter so that the movable part can move along the limiter. The movable part plays a role of limiting and fixing the spring, which can make the valve core assembly more stable when it is moved by the spring reset. In the first state, the springs at both ends of the valve core assembly are more evenly stressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of this embodiment.

[0018] Figure 2 It is a front view of this embodiment.

[0019] Figure 3 It is a top view of this embodiment.

[0020] Figure 4 for Figure 2 Cross-sectional view along the A direction.

[0021] Figure 5 for Figure 2 Cross-sectional view along the B direction.

[0022] Figure 6 for Figure 3 Cross-sectional view along the C direction.

[0023] Figure 7 for Figure 3 Cross-sectional view along the D direction.

[0024] Figure 8 for Figure 4 Enlarged view of point E in the middle.

[0025] Fig. 9 Schematic diagram of the first state in this embodiment.

[0026] Fig.10 Schematic diagram of the second state in this embodiment.

[0027] Fig.11 Schematic diagram of the third state in this embodiment.

[0028] Numbers in the figure: 1, valve seat; 11, first valve port; 12, second valve port; 13, third valve port; 14, fourth valve port; 15, fifth valve port; 16, valve chamber; 161, balance channel; 17, first channel; 171, first through hole; 2, mounting seat; 21, mounting groove; 211, second through hole; 22, second channel; 23, third through hole; 231, third channel; 24, fourth through hole; 241, fourth channel; 25, fifth through hole; 3. First pilot valve; 31. First moving iron core; 4. Second pilot valve; 41. Second moving iron core; 5. Valve core frame; 51. Guide member; 511. Annular groove; 52. Bracket; 53. Sealing ring; 6. Valve core assembly; 61. Valve stem; 611. Socket; 612. Small diameter section; 62. Piston; 621. Sealing ring; 63. Spring; 64. Limit member; 641. Stop edge; 65. Movable member; 651. Ring plate; 652. Sixth through hole. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings show typical embodiments of the present invention.

[0030] like Figure 1 , Figure 2 , Figure 3As shown, this embodiment discloses a three-position five-way solenoid valve, including a valve seat 1, a mounting seat 2, a first pilot valve 3 and a second pilot valve 4. Two mounting seats 2 are respectively installed at both ends of the valve seat 1, and the two mounting seats 2 are respectively installed with the first pilot valve 3 and the second pilot valve 4.

[0031] like Figure 4 , Figure 7 As shown, the valve seat 1 is provided with a first valve port 11, a second valve port 12, a third valve port 13, a fourth valve port 14, a fifth valve port 15, and a valve cavity 16. The valve cavity 16 runs through the valve seat 1. The first valve port 11, the second valve port 12, the third valve port 13, the fourth valve port 14, and the fifth valve port 15 are all connected to the valve cavity 16. The first valve port 11, the third valve port 13, and the fifth valve port 15 are located on the same side of the valve seat 1. The first valve port 11 is located between the third valve port 13 and the fifth valve port 15. The second valve port 12 and the fourth valve port 14 are located on the same side of the valve seat 1. A valve core skeleton 5 is installed in the valve cavity 16. A valve core assembly 6 is installed in the valve core skeleton 5. The valve core assembly 6 can slide in the valve core skeleton 5, thereby achieving connection switching between multiple valve ports.

[0032] like Figure 4 , Figure 7 As shown, the valve core skeleton 5 includes a guide member 51, a plurality of brackets 52 and a plurality of sealing rings 53. There are two guide members 51, which are respectively located at the two ends of the valve cavity 16. The guide members 51 are sealed and connected with the mounting seats 2 facing in the corresponding directions. The plurality of brackets 52 and the plurality of sealing rings 53 are located between the two guide members 51. The bracket 52 is a hollow structure. The medium at each valve port can flow through the bracket 52. The sealing ring 53 is installed between two adjacent brackets 52. The brackets 52 located at the two ends are respectively connected to the two guide members 51. Install the sealing ring 53, which can press against the outer wall of the valve core assembly 6. The sealing ring 53 blocks the flow of medium in the valve core skeleton 5 and plays a role of barrier sealing. Two sealing rings 53 are correspondingly arranged on both sides of each valve port, which can better seal. At the same time, the valve core skeleton 5 is composed of two guide members 51, a plurality of brackets 52 and a plurality of sealing rings 53. The two guide members 51 receive the pressing effect of the mounting seat 2 to clamp and fix the plurality of brackets 52 and the plurality of sealing rings 53 between the two guide members 51.

[0033] like Figure 4 , Figure 7As shown, the valve core assembly 6 includes a valve stem 61 and two pistons 62. Slots 611 are provided at both ends of the valve stem 61. The two pistons 62 are installed at both ends of the valve stem 61. A portion of the piston 62 is located in the slot 611, and a portion of the piston 62 is located in the guide member 51. The piston 62 is installed with a sealing ring 621, and the sealing ring 621 presses against the inner wall of the guide member 51. The sealing ring 621 can separate the interior of the guide member 51 into two parts. The medium can enter the space between the sealing ring 621 and the mounting seat 2 to press the piston 62 to move the valve core assembly 6.

[0034] like Figure 4 , Figure 7 As shown, the valve stem 61 includes two small diameter sections 612, and a space for medium circulation can be formed between the small diameter section 612 and the sealing ring 53. When the valve core assembly 6 moves, the portion of the valve stem 61 provided with the small diameter section 612 will not produce a pressure seal with the sealing ring 53, so that the medium can flow through the small diameter section 612 and then the medium can flow between the two valve ports.

[0035] like Figure 4 , Figure 8 As shown, the piston 62 includes a limit member 64, a movable member 65, and a spring 63. A portion of the spring 63 is located inside the piston 62. The limit member 64 is fixedly installed on the piston 62, and the movable member 65 is installed on the limit member 64. The movable member 65 can move along the limit member 64, and a portion of the movable member 65 can extend out of the limit member 64. The spring 63 presses the movable member 65 toward the mounting seat 2 corresponding to the piston 62. The movable member 65 is fixedly limited by the limit member 64 so that the movable member 65 can move along the limit member 64. The movable member 65 limits and fixes the spring 63, so that the valve core assembly 6 can be more stable when it is reset and moved by the spring 63.

[0036] More preferably, the movable part 65 is provided with a sixth through hole 652, which connects the inner end surface and the outer end surface of the movable part 65. The sixth through hole 652 can balance the air pressure between the inside of the piston 62 and the inside of the guide part 51, so that the movable part 65 will not be affected by the air pressure difference when it is extended and retracted.

[0037] More preferably, the limit member 64 is provided with a stop edge 641, and the movable member 65 is provided with a ring plate 651. When the spring 63 presses the movable member 65 to extend to the farthest end of the limit member 64, the ring plate 651 presses the stop edge 641. The ring plate 651 is always located inside the limit member 64. The cooperation of the stop edge 641 and the ring plate 651 can limit the farthest extension distance of the movable member 65. At the same time, the movable member 65 covers the outer end of the spring 63 to make the pressure of the spring 63 more stable, thereby stabilizing and protecting the spring 63. The limit member 64 guides the movable member 65, so that the valve core assembly 6 is more stable when moving.

[0038] like Figure 8 As shown, the outer wall of the guide member 51 is provided with an annular groove 511, and the valve seat 1 is provided with a balancing channel 161. The balancing channel 161 is connected to the annular groove 511, and the annular groove 511 is connected to a part of the space inside the guide member 51 away from the mounting seat 2. When the piston 62 moves toward or away from the mounting seat 2 in the corresponding direction, a pressure difference will be generated in the part of the space inside the guide member 51 away from the mounting seat 2 due to the sealing effect of the sealing ring 621. At the beginning, the annular groove 511 and the balancing channel 161 can balance the air pressure in the part of the space inside the guide member 51 away from the mounting seat 2, so that the piston 62 can move better and reduce the influence of air pressure resistance.

[0039] like Figure 5 , Figure 6 As shown, the mounting seat 2 is provided with a mounting groove 21, the valve seat 1 is provided with a first channel 17, the first channel 17 is connected to the first valve port 11, the valve seat 1 is provided with a first through hole 171, the first through hole 171 penetrates the first channel 17 and then connects to the first valve port 11, the mounting seat 2 is provided with a second through hole 211, a fifth through hole 25, a third through hole 23 and a fourth through hole 24, the third through hole 23 and the fourth through hole 24 are symmetrically positioned, the side wall of the mounting seat 2 is provided with a second channel 22 inwardly, the bottom surface of the mounting seat 2 is provided with a third channel 231 and a fourth channel 241 inwardly, the third channel 231 is connected to the third through hole 23, and the fourth channel 241 is connected to the fourth through hole 24, the second channel 22, the third channel 231, and the fourth channel 241 are all formed by punching from the outside to the inside, and the interconnected channels and through holes or channels and channels are vertically arranged for easier processing, the outer end openings of the second channel 22, the third channel 231, and the fourth channel 241 are all installed with a sealing plug, the second The channel 22 is connected to the second through hole 211, the third channel 231, and the fourth channel 241, and then the second through hole 211 is connected to the third through hole 23 and the fourth through hole 24. The first channel 17 runs through the valve seat 1 and can be connected to the second through holes 211 of the two mounting seats 2. The third through hole 23 of the mounting seat 2 on which the first pilot valve 3 is installed is connected to the first channel 17, and the fourth through hole 24 of the mounting seat 2 on which the second pilot valve 4 is installed is connected to the first channel 17. The connection between the first channel 17 and the third through hole 23 and the fourth through hole 24 is provided by a sealing arrangement. The second through hole 211 is connected to the mounting groove 21, and the fifth through hole 25 is connected to the mounting groove 21 and the valve cavity 16. The medium in the first valve port 11 flows through the first through hole 171, the first channel 17, the third through hole 23 or the fourth through hole 24, the third channel 231 or the fourth channel 241, the second channel 22, and the second through hole 211 into the mounting groove 21, and flows to the inside of the guide member 51 through the fifth through hole 25, so as to push the piston 62.

[0040] like Figure 7 , Fig. 9 , Fig.10 , Fig.11As shown, the first pilot valve 3 includes a first moving iron core 31, the second pilot valve 4 includes a second moving iron core 41, a portion of the first moving iron core 31 and a portion of the second moving iron core 41 are both located in the mounting groove 21 of the corresponding mounting seat 2, and the valve core assembly 6 includes a first state, a second state, and a third state. Fig. 9 As shown, in the first state, the first pilot valve 3 and the second pilot valve 4 are both powered off, and in the first state, the first moving iron core 31 and the second moving iron core 41 both block the second through hole 211 of the corresponding mounting seat 2, and the valve core assembly 6 blocks all valve ports, and all valve ports are in a disconnected state.

[0041] like Fig.10 As shown, in the second state, the first pilot valve 3 is energized and the second pilot valve 4 is de-energized. In the second state, the first moving iron core 31 is away from the second through hole 211 of the corresponding mounting seat 2, and then the first channel 17 is connected to the mounting groove 21 of the mounting seat 2 where the first pilot valve 3 is installed. The second moving iron core 41 blocks the second through hole 211 of the corresponding mounting seat 2. From the first state to the second state, the medium of the first valve port 11 in the figure flows to the space above the valve core assembly 6, and the valve core assembly 6 moves downward. The valve core assembly 6 approaches the second pilot valve 4, and then the first valve port 11 is connected to the second valve port 12, and the fourth valve port 14 is connected to the fifth valve port 15. When the first pilot valve 3 is de-energized, the first moving iron core 31 blocks the second through hole 211 of the corresponding mounting seat 2. From the second state to the first state, the spring 63 at the lower end of the valve core assembly 6 presses the valve core assembly 6 to move upward, and the valve core assembly 6 is restored to the position of the first state.

[0042] like Fig.11 As shown, in the third state, the first pilot valve 3 is powered off and the second pilot valve 4 is powered on. In the third state, the first moving iron core 31 blocks the second through hole 211 of the corresponding mounting seat 2. From the first state to the third state, the medium of the first valve port 11 in the figure flows to the space below the valve core assembly 6, the valve core assembly 6 moves upward, the second moving iron core 41 moves away from the second through hole 211 of the corresponding mounting seat 2, and then the first channel 17 is connected to the mounting groove 21 of the mounting seat 2 where the second pilot valve 4 is installed. When the first pilot valve 3 is powered off, the first moving iron core 31 blocks the second through hole 211 of the corresponding mounting seat 2, the valve core assembly 6 approaches the first pilot valve 3, and then the first valve port 11 is connected to the fourth valve port 14, and the second valve port 12 is connected to the third valve port 13. When the first pilot valve 3 is powered off, the second moving iron core 41 blocks the second through hole 211 of the corresponding mounting seat 2. From the third state to the first state, the spring 63 at the upper end of the valve core assembly 6 presses the valve core assembly 6 to move downward, and the valve core assembly 6 is restored to the position of the first state.

[0043] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-position five-way solenoid valve, characterized in that: The valve seat (1) comprises a valve seat (1), a mounting seat (2), a first pilot valve (3) and a second pilot valve (4), wherein two mounting seats (2) are respectively mounted at both ends of the valve seat (1), and the first pilot valve (3) and the second pilot valve (4) are respectively mounted on the two mounting seats (2), and the valve seat (1) is provided with a first valve port (11), a second valve port (12), a third valve port (13), a fourth valve port (14), a fifth valve port (15), and a valve cavity (16), and the valve cavity (16) passes through the valve seat (1), and the first valve port (11), the third valve port (13), the fourth valve port (14), the fifth valve port (15), and a valve cavity (16). The second valve port (12), the third valve port (13), the fourth valve port (14), and the fifth valve port (15) are all connected to the valve cavity (16); a valve core skeleton (5) is installed in the valve cavity (16); a valve core assembly (6) is installed in the valve core skeleton (5); the valve core assembly (6) is able to slide in the valve core skeleton (5); the mounting seat (2) is provided with a mounting groove (21); the valve seat (1) is provided with a first channel (17); the first channel (17) is connected to the first valve port (11); the mounting seat (2) is provided with a second The first passage (17) penetrates the valve seat (1) and is capable of communicating with the second through holes (211) of the two mounting seats (2); the second through hole (211) is connected to the mounting groove (21); the fifth through hole (25) is connected to the mounting groove (21) and the valve cavity (16); the valve core assembly (6) comprises a first state, a second state, and a third state; in the first state, the first pilot valve (3) and the second pilot valve (4) are both powered off, and the valve core assembly (6) blocks all valve ports; In the second state, the first pilot valve (3) is energized and the second pilot valve (4) is de-energized; the valve core assembly (6) is close to the second pilot valve (4), so that the first valve port (11) is connected to the second valve port (12), and the fourth valve port (14) is connected to the fifth valve port (15); in the third state, the first pilot valve (3) is de-energized and the second pilot valve (4) is energized; the valve core assembly (6) is close to the first pilot valve (3), so that the first valve port (11) is connected to the fourth valve port (14), and the second valve port (12) is connected to the third valve port (13).

2. A three-position five-way solenoid valve according to claim 1, characterized in that: The first pilot valve (3) comprises a first moving iron core (31), and the second pilot valve (4) comprises a second moving iron core (41). A portion of the first moving iron core (31) and a portion of the second moving iron core (41) are both located in a mounting groove (21) of a corresponding mounting seat (2). In a first state, the first moving iron core (31) and the second moving iron core (41) both block a second through hole (211) of the corresponding mounting seat (2). In a second state, the first moving iron core (31) is away from the second through hole (211) of the corresponding mounting seat (2). ) and then the first channel (17) is connected to the mounting groove (21) of the mounting seat (2) for mounting the first pilot valve (3), and the second moving iron core (41) blocks the second through hole (211) of the corresponding mounting seat (2). In the third state, the first moving iron core (31) blocks the second through hole (211) of the corresponding mounting seat (2), and the second moving iron core (41) is away from the second through hole (211) of the corresponding mounting seat (2), and then the first channel (17) is connected to the mounting groove (21) of the mounting seat (2) for mounting the second pilot valve (4).

3. A three-position five-way solenoid valve according to claim 1, characterized in that: The valve core skeleton (5) comprises a guide member (51), a plurality of brackets (52) and a plurality of sealing rings (53). The number of the guide members (51) is two. The two guide members (51) are respectively located at the two ends of the valve cavity (16). The guide member (51) is sealedly connected to the mounting seat (2) facing in the corresponding direction. The plurality of brackets (52) and the plurality of sealing rings (53) are located between the two guide members (51). The sealing ring (53) is installed between two adjacent brackets (52). The brackets (52) located at the two ends are respectively installed with sealing rings (53) between the two guide members (51). The sealing ring (53) can press against the outer peripheral wall of the valve core assembly (6).

4. A three-position five-way solenoid valve according to claim 3, characterized in that: The valve core assembly (6) comprises a valve stem (61) and two pistons (62). Slots (611) are provided at both ends of the valve stem (61). The two pistons (62) are installed at both ends of the valve stem (61). A portion of the piston (62) is located in the slot (611). A portion of the piston (62) is located in the guide member (51). A sealing ring (621) is installed on the piston (62). The sealing ring (621) presses against the inner wall of the guide member (51).

5. A three-position five-way solenoid valve according to claim 4, characterized in that: The valve stem (61) includes two small diameter sections (612), and a space for medium to flow can be formed between the small diameter sections (612) and the sealing ring (53).

6. A three-position five-way solenoid valve according to claim 4, characterized in that: The piston (62) comprises a limiting member (64), a movable member (65), and a spring (63); a portion of the spring (63) is located inside the piston (62); the limiting member (64) is fixedly mounted on the piston (62); the movable member (65) is mounted on the limiting member (64); the movable member (65) can move along the limiting member (64); a portion of the movable member (65) can extend out of the limiting member (64); and the spring (63) presses the movable member (65) toward a mounting seat (2) corresponding to the piston (62).

7. A three-position five-way solenoid valve according to claim 6, characterized in that: The movable member (65) is provided with a sixth through hole (652), and the sixth through hole (652) is connected to the inner end surface and the outer end surface of the movable member (65).

8. The three-position five-way solenoid valve according to claim 6, characterized in that: The limiting member (64) is provided with a stop edge (641), and the movable member (65) is provided with a ring plate (651). When the spring (63) presses the movable member (65) to extend to the farthest end of the limiting member (64), the ring plate (651) presses the stop edge (641).

9. A three-position five-way solenoid valve according to claim 4, characterized in that: The outer wall of the guide member (51) is provided with an annular groove (511), the valve seat (1) is provided with a balancing channel (161), the balancing channel (161) is connected to the annular groove (511), the sealing ring (621) can separate the interior of the guide member (51) into two parts, and the annular groove (511) is connected to a part of the space inside the guide member (51) away from the mounting seat (2).

10. The three-position five-way solenoid valve according to claim 1, characterized in that: The mounting seat (2) is provided with a third through hole (23) and a fourth through hole (24), the third through hole (23) and the fourth through hole (24) are symmetrically located, a second channel (22) is provided inwardly on the side wall of the mounting seat (2), a third channel (231) and a fourth channel (241) are provided inwardly on the bottom surface of the mounting seat (2), the third channel (231) is connected to the third through hole (23), the fourth channel (241) is connected to the fourth through hole (24), the second channel (22) is connected to the second through hole (211), the third channel (231), and the fourth channel (241), and the second through hole (211) is connected to the third through hole (23) and the fourth through hole (24), the third through hole (23) of the mounting seat (2) on which the first pilot valve (3) is mounted is connected to the first channel (17), and the fourth through hole (24) of the mounting seat (2) on which the second pilot valve (4) is mounted is connected to the first channel (17).

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