CN116241681A

CN116241681A - Coil switching valve

Info

Publication number: CN116241681A
Application number: CN202310110526.4A
Authority: CN
Inventors: 杨晓明; 蔡琳霞
Original assignee: Hangzhou Kambayashi Electronics Co Ltd
Current assignee: Hangzhou Kambayashi Electronics Co Ltd
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-06-09

Abstract

The invention provides a coil switching valve which comprises a water inlet, a water outlet A, a water outlet B, a coil assembly, an iron core, a piston switching assembly and a switching cavity communicated with the water inlet, wherein the piston switching assembly is arranged in a central cavity of the coil assembly and comprises a piston main body, an auxiliary piston and an elastic piece, the piston main body is movably connected with the auxiliary piston, the elastic piece is arranged between the piston main body and the auxiliary piston, a valve seat A is arranged between the water outlet A and the switching cavity, a valve seat B is arranged between the water outlet B and the switching cavity, a piston cap is arranged at the end part of the auxiliary piston and extends into the switching cavity and is used for sealing the valve seat A or the valve seat B. The valve body is used for a water tank and pump toilet flushing system, can realize waterway switching in a few milliseconds, avoids the problem of insufficient flushing water pressure, is reliable in sealing after waterway switching, can not mutually cross water on the side of the brush ring and the side of the bottom flushing, and has the functions of blocking siphon generated in the flushing process and reducing flushing cavitation noise.

Description

Coil switching valve

[ field of technology ]

The invention relates to the technical field of multi-waterway switching systems, in particular to application of a coil switching valve in waterway switching.

[ background Art ]

The toilet bowl is commonly called a toilet bowl, and the flushing mode of the toilet bowl is usually direct flushing type or siphon type. The conventional switching valve for toilet flushing generally has two water outlets, one water outlet is connected to the flushing side (RIM side, i.e. brush ring side) of the toilet bowl wall, and the other water outlet is connected to the siphon flushing side (JET side, i.e. bottom flushing side), and typically the outlet of the RIM side pipe is located below the inner toilet seat and near the seat, and the outlet of the JET side pipe is located at a low position and at the water storage portion of the toilet bowl.

The waterway flushing switching valve of the existing water tank and pump toilet system generally adopts a stepping motor driving rotation mode to realize the switching of two water outlets of JET and RIM, and the switching mode has certain defects: on the one hand, the switching process is slower (1-2 seconds are needed) and wastes time and water efficiency, and the two water outlet branches can divide pressure during switching, so that the problem of insufficient flushing water pressure is caused; on the other hand, the stepper motor driven switching valve is high in cost, sealing is unreliable, water flows through the JET side and the RIM side, air enters the waterway and the switching valve, flushing noise is caused, and flushing performance and user experience are affected.

Compared with a stepping motor driven switching valve, the electromagnetic control switching valve has the advantages of fast switching, good sealing performance, low cost, simple driving circuit and the like. However, a general solenoid-operated switching valve is only suitable for switching between water paths in a pressureless state and has a small flow path (because of small coil attraction, low piston lifting height), and when the solenoid-operated switching valve is directly used as a toilet switching valve, it cannot satisfy switching between water paths in a pressurized state when a water pump is turned on and the impulse force required for a large flow.

[ invention ]

The invention aims to solve the problems in the prior art, and provides a coil switching valve which can meet the requirements of rapid switching of waterways in a pressurized state, and has the advantages of good sealing performance, low cost and simple driving circuit.

In order to achieve the above purpose, the invention provides a coil switching valve, which comprises a water inlet, a water outlet A, a water outlet B, a coil assembly, an iron core, a piston switching assembly and a switching cavity communicated with the water inlet, wherein the piston switching assembly is arranged in a central cavity of the coil assembly and comprises a piston main body, an auxiliary piston and an elastic piece, the piston main body is movably connected with the auxiliary piston, the elastic piece is arranged between the piston main body and the auxiliary piston, a valve seat A is arranged between the water outlet A and the switching cavity, a valve seat B is arranged between the water outlet B and the switching cavity, a piston cap is arranged at the end part of the auxiliary piston, and the piston cap stretches into the switching cavity and is used for sealing the valve seat A or the valve seat B.

Preferably, the piston body and the auxiliary piston are relatively movable, the movement distance between the piston body and the auxiliary piston is a, the movement distance between the piston body and the iron core is b, and the distance a is smaller than the distance b

Preferably, the end part of the piston main body is provided with a connecting sliding rod, the auxiliary piston is provided with a sliding cavity, the end part of the connecting sliding rod stretches into the sliding cavity and is provided with a piston disc, and the elastic piece is arranged between the piston disc and the sliding cavity.

Preferably, when the coil assembly is not electrified, the piston cap is pressed against the valve seat B and seals the water outlet B, so that the water inlet and the water outlet A keep a passage; when the coil assembly is electrified, the piston main body rises under the magnetic force action of the iron core, so that the piston cap is separated from the abutting of the valve seat B until the piston main body abuts against the iron core, and at the moment, the piston cap is pressed against the valve seat A under the action of the restoring force of the auxiliary piece and seals the water outlet A, so that the water inlet and the water outlet B keep a passage.

Preferably, a connector is arranged at one end, facing the piston main body, of the auxiliary piston, a sliding cavity is formed in the connector, a guide seat is arranged in the sliding cavity, an inserting cavity which can be used for the connecting sliding rod to extend in is formed in the guide seat, the inserting cavity is communicated with the sliding cavity, and the elastic piece is installed between the piston disc and the guide seat.

Preferably, the elastic member is a spring.

Preferably, one end of the piston body, which is opposite to the auxiliary piston, is connected with the iron core through a piston spring.

The invention has the beneficial effects that: the coil switching valve can be used for a water tank and pump closestool flushing system, the coil assembly is used for controlling the piston switching assembly to act to switch waterways, the waterways can be switched within a few milliseconds, the problem of insufficient flushing water pressure caused by partial pressure of other water outlet branches is solved, the sealing is reliable after the waterways are switched, the water can not be mutually mixed between the brush ring side and the bottom flushing side, and the coil switching valve has the functions of blocking siphon generated in the flushing process and reducing flushing cavitation noise. When the coil assembly is electrified, the upper piston main body is adsorbed, the attractive force is compressed only by overcoming the fact that the piston spring force does not have water pressure, the closer the piston main body is to the iron core, the larger the attractive force is, then the piston main body overcomes the water pressure generated by the piston cap under the action of magnetic attraction, the auxiliary piston and the piston cap are lifted away from the valve seat B, the auxiliary piston and the piston cap are not lifted up under the action of the restoring force of the elastic member, the sufficient water flow path height is ensured until the piston cap is lifted up to block the valve seat A, waterway switching is realized in two steps, and the problems that the piston switching assembly cannot be pulled up due to the water pressure and large flow cannot be ensured are solved.

The features and advantages of the present invention will be described in detail by way of example with reference to the accompanying drawings.

[ description of the drawings ]

FIG. 1 is a schematic diagram of a coil switching valve according to the present invention;

FIG. 2 is a cross-sectional view of the internal structure of the present invention in the initial and de-energized state of the switching valve;

FIG. 3 is an enlarged schematic view of the structure at A of FIG. 2;

FIG. 4 is a cross-sectional view of the internal structure of the present invention in a state in which the piston body is pulled up after the coil block is energized to increase the attractive force;

FIG. 5 is a sectional view showing the internal structure of the present invention in a state in which the piston cap is attracted and lifted;

fig. 6 is a sectional view showing the internal structure of the present invention in the final state of the switch valve.

[ detailed description ] of the invention

Referring to fig. 1 to 6, the coil switching valve of the present invention includes a water inlet 101, a water outlet a102 and a water outlet B103 respectively connected to a flushing side and a siphon flushing side of a toilet bowl, a coil assembly 1, an iron core 2, a piston switching assembly, and a switching cavity 100 connected to the water inlet 101, where the piston switching assembly is disposed in a central cavity of the coil assembly 1, and includes a piston main body 4, an auxiliary piston 5, and an elastic member 6, the piston main body 4 is movably connected with the auxiliary piston 5, an elastic member 6 is disposed between the piston main body and the auxiliary piston, a valve seat a1021 is disposed between the water outlet a102 and the switching cavity 100, a valve seat B1031 is disposed between the water outlet B103 and the switching cavity 100, a piston cap 52 is disposed at an end of the auxiliary piston 5, and the piston cap 52 extends into the switching cavity 100 to block the valve seat a1021 or the valve seat B1031.

Further, the piston body 4 and the auxiliary piston 5 can move relatively, the moving distance between the piston body 4 and the auxiliary piston 5 is a, the moving distance between the piston body 4 and the iron core 2 is b, and the distance a is smaller than the distance b.

Further, referring to fig. 3, a connecting sliding rod 42 is disposed at an end of the piston main body 4, a sliding cavity 510 is formed on the auxiliary piston 5, an insertion cavity into which the connecting sliding rod 42 extends is formed on the sliding cavity 510, an end of the connecting sliding rod 42 extends into the sliding cavity 510 and is provided with a piston disc 43, and the elastic member 6 is mounted between the piston disc 43 and the sliding cavity 510. In this embodiment, the elastic member 6 is a spring.

Further, when the coil assembly 1 is not electrified, the piston cap 52 is pressed against the valve seat B1031 and seals the water outlet B103, so that the water inlet 101 and the water outlet A102 keep a passage; when the coil assembly 1 is electrified, the piston main body 4 rises under the action of the magnetic force of the iron core 2, so that the piston cap 52 is separated from abutting against the valve seat B1031 until the piston main body 4 abuts against the iron core 2, and at the moment, the piston cap 52 is pressed against the valve seat A1021 under the action of the restoring force of the auxiliary piece 6 and seals the water outlet A102, so that the water inlet 101 and the water outlet B103 keep a passage.

Further, referring to fig. 3, a connector 51 is disposed at one end of the auxiliary piston 5 facing the piston main body 4, a sliding cavity 510 is formed in the connector 51, a guide seat 511 is disposed in the sliding cavity 510, an insertion cavity into which the connecting sliding rod 42 extends is disposed in the guide seat 511, the insertion cavity is communicated with the sliding cavity 510, and the elastic member 6 is mounted between the piston disc 43 and the guide seat 511.

Further, referring to fig. 2, an end of the piston body 4 facing away from the auxiliary piston 5 is connected to the iron core 2 through a piston spring 41. In the present embodiment, the top of the piston body 4 has a central groove that can accommodate the piston spring 41; of course, a small diameter end may be provided at the upper portion of the piston main body 4 so that an annular cavity is formed between the small diameter end and the inner wall of the coil block 1, and the piston spring 41 is installed in the annular cavity outside the small diameter end and connected to the iron core 2.

The working process of the invention comprises the following steps:

when the coil assembly 1 is not energized, as shown in fig. 2 and 3, the piston switching assembly presses the piston cap 52 against the valve seat B1031 under the action of the piston spring 41 and the elastic member 6 to block the water outlet B103. At this time, the water inlet 101 and the water outlet a102 keep the passage for brush ring flushing.

In the initial state of the energizing of the coil assembly 1, in the first step, as shown in fig. 4, the upper piston body 4 is adsorbed by the magnetic force of the iron core 2, and at this time, the attractive force is not water pressure as long as the attractive force overcomes the spring force of the piston spring 41, the auxiliary piston 5 is not moved, and the elastic member 6 is compressed. And secondly, the piston cap 52 is lifted to a change state shown in fig. 5, at this time, the piston main body 4 is lifted to a position closer to the iron core 2 to generate larger magnetic attraction force, then the piston main body 4 overcomes the water pressure generated by the piston cap 52 and the auxiliary piston 5 and the piston cap 52 are lifted away from the valve seat B1031 under the action of the magnetic attraction force, the piston main body 4 is firstly in place and keeps the abutting state with the iron core 2, at this time, the auxiliary piston 5 and the piston cap 52 are not subjected to the water pressure and are lifted under the action of the restoring force of the elastic piece 6, so that the sufficient water flow path height is ensured, and the valve enters the switching valve electrifying final state shown in fig. 6. At this time, the piston cap 52 abuts against the valve seat a1021 to close the water outlet a102. At this time, the water inlet 101 and the water outlet B103 are kept in the passage, and the water passage is switched to perform the bottom flushing.

The invention is not only applied to the closestool, but also can be applied to other products related to waterway switching to solve similar problems by using the coil switching valve scheme. The above embodiments are illustrative of the present invention, and not limiting, and any simple modifications of the present invention fall within the scope of the present invention.

Claims

1. The utility model provides a coil switching valve, includes water inlet (101), delivery port A (102), delivery port B (103), its characterized in that: still include coil pack (1), iron core (2), piston switch assembly, and with switching chamber (100) that water inlet (101) are linked together, piston switch assembly sets up in the central intracavity of coil pack (1), including piston main part (4), auxiliary piston (5) and elastic component (6), piston main part (4) with auxiliary piston (5) swing joint is equipped with elastic component (6) between the two, be equipped with disk seat A (1021) between delivery port A (102) and switching chamber (100), be equipped with disk seat B (1031) between delivery port B (103) and switching chamber (100), the tip of auxiliary piston (5) is equipped with piston cap (52), piston cap (52) stretch into in switching chamber (100) for shutoff disk seat A (1021) or disk seat B (1031).

2. A coil switching valve as set forth in claim 1, wherein: the piston main body (4) and the auxiliary piston (5) can move relatively, the movement distance between the piston main body (4) and the auxiliary piston (5) is a, the movement distance between the piston main body (4) and the iron core (2) is b, and the distance a is smaller than the distance b.

3. A coil switching valve as set forth in claim 1, wherein: the end of the piston main body (4) is provided with a connecting sliding rod (42), the auxiliary piston (5) is provided with a sliding cavity (510), the end of the connecting sliding rod (42) extends into the sliding cavity (510) and is provided with a piston disc (43), and the elastic piece (6) is arranged between the piston disc (43) and the sliding cavity (510).

4. A coil switching valve according to any one of claims 1 to 3, wherein: when the coil assembly (1) is not electrified, the piston cap (52) is pressed against the valve seat B (1031) and seals the water outlet B (103), so that the water inlet (101) and the water outlet A (102) keep a passage; when the coil assembly (1) is electrified, the piston main body (4) rises under the magnetic force action of the iron core (2), so that the piston cap (52) is separated from abutting against the valve seat B (1031) until the piston main body (4) abuts against the iron core (2), and at the moment, the piston cap (52) is pressed against the valve seat A (1021) under the action of the restoring force of the auxiliary piece (6) and seals the water outlet A (102), so that the water inlet (101) and the water outlet B (103) keep a passage.

5. A coil switching valve according to any one of claims 1 to 3, wherein: the auxiliary piston is characterized in that a connector (51) is arranged at one end, facing the piston main body (4), of the auxiliary piston (5), a sliding cavity (510) is formed in the connector (51), a guide seat (511) is arranged in the sliding cavity (510), a cavity for the connecting sliding rod (42) to extend in is formed in the guide seat (511), the cavity is communicated with the sliding cavity (510), and an elastic piece (6) is installed between the piston disc (43) and the guide seat (511).

6. A coil switching valve as set forth in claim 1, wherein: the elastic piece (6) is a spring.

7. A coil switching valve as set forth in claim 1, wherein: one end of the piston main body (4) facing away from the auxiliary piston (5) is connected with the iron core (2) through a piston spring (41).