阅读说明：本技术 一种磁吸式防增压串水装置 (Magnetic suction type anti-pressurization water mixing device ) 是由 王强 于 2021-08-26 设计创作，主要内容包括：本发明涉及一种磁吸式防增压串水装置,包括：第一横管、第二横管和水流通道开合控制装置；所述第一横管内设置有横隔板,所述横隔板将所述第一横管分隔为下腔体和上腔体,所述下腔体设置有第一开口,所述上腔体设置有第二开口；所述横隔板上设置有过水口；所述第二横管设置有第三开口和第四开口,所述第三开口与所述上腔体所述第二开口连接；所述水流通道开合控制装置包括：活塞装置和过水口开关装置；所述活塞装置包括：活塞体、活塞体延长部、活塞复位弹簧和第一磁铁；所述过水口开关装置包括,过水口开关阀板、第二磁铁和第三磁铁；解决了热水管道内被增大压力的热水水流串入冷水管道的问题,使用方便,能够实现更加节能的应用效果。(The invention relates to a magnetic suction type anti-pressurization water crossing device, which comprises: the first transverse pipe, the second transverse pipe and the water flow channel opening and closing control device; a transverse clapboard is arranged in the first transverse pipe and divides the first transverse pipe into a lower cavity and an upper cavity, the lower cavity is provided with a first opening, and the upper cavity is provided with a second opening; a water passing port is formed in the diaphragm plate; the second transverse pipe is provided with a third opening and a fourth opening, and the third opening is connected with the second opening of the upper cavity; the water flow channel opening and closing control device comprises: the piston device and the water passing opening and closing device; the piston device includes: the piston comprises a piston body, a piston body extension part, a piston return spring and a first magnet; the water passing opening switch device comprises a water passing opening switch valve plate, a second magnet and a third magnet; the problem of by the interior hot water rivers cluster of increase pressure of hot water pipeline go into cold water pipeline is solved, convenient to use can realize more energy-conserving application effect.)

1. The utility model provides a pressure boost cluster water installation is prevented to magnetism, which characterized in that includes: the device comprises a first transverse pipe (1), a second transverse pipe (2) and a water flow channel opening and closing control device;

a transverse clapboard (3) is arranged in the first transverse pipe (1), the transverse clapboard (3) divides the first transverse pipe (1) into a lower cavity (4) and an upper cavity (5), the lower cavity (4) is provided with a first opening (6), and the upper cavity (5) is provided with a second opening (7);

a water passing port (8) is formed in the diaphragm plate (3), and the lower cavity (4) is communicated with the upper cavity (5) through the water passing port (8) and the first opening (6) is communicated with the second opening (7);

the second transverse pipe (2) is provided with a third opening (9) and a fourth opening (10), and the third opening (9) is connected with the second opening (7) of the upper cavity (5); the caliber of the third opening (9) is smaller than the inner diameter of the second transverse pipe (2);

the water flow channel opening and closing control device comprises: the piston device and the water passing opening and closing device; the piston device and the water passing opening switch device are in linkage relation;

the piston device includes: a piston body (11), a piston body extension part (12), a piston return spring (13) and a first magnet (14);

the piston body (11) is arranged in the second transverse pipe (2) in a sliding manner, one end of the piston return spring (13) is connected with the pipe wall of one end of the third opening (9) of the second transverse pipe (2), and the other end of the piston return spring is connected with one side, facing the third opening (9), of the piston body (11); the piston body extension part (12) is arranged on one side of the piston body (11) facing the third opening (9), the piston body extension part (12) extends out of the third opening (9) and extends into the upper cavity (5) of the first transverse pipe (1), and the first magnet (14) is arranged at the end of the piston body extension part (12); the piston body (11) has a diameter larger than the third opening (9);

the water passing opening and closing device comprises a water passing opening and closing valve plate (15), a second magnet (16) and a third magnet (17);

the water passing opening and closing valve plate (15) is arranged in the lower cavity (4) and is in shaft rotating connection with the pipe wall of the lower cavity (4); the second magnet (16) is arranged on the water passing opening and closing valve plate (15), and the third magnet (17) is arranged on the water passing opening and closing valve plate (15).

2. The magnetic attraction type anti-pressurization water crossing device according to claim 1, wherein the piston device further comprises: a one-way valve arrangement; a water passing hole (18) is formed in the piston body (11);

the check valve device comprises a check valve plate sleeve (19), a check valve plate (20) and a check valve plate return spring (21);

the one-way valve device is arranged on one side of the piston body (11) facing the fourth opening (10);

one end of the one-way valve plate sleeve (19) is communicated and butted with the water passing hole (18) in the piston body (11), the one-way valve plate (20) is slidably arranged in the one-way valve plate sleeve (19), one end of a one-way valve plate reset spring (21) is connected with one side of the one-way valve plate (20), the other end of the one-way valve plate reset spring is connected with the pipe wall of the other end of the one-way valve plate sleeve (19), the one-way valve plate (20) is kept at a position where the one-way valve plate reset spring (21) is attached to and covers the water passing hole (18) in the piston body, and the wall of the one-way valve plate sleeve (19) is a water permeable hollow grid; the piston body (11) has a diameter larger than the fourth opening (10).

3. The magnetic attraction type anti-pressurization water crossing device according to any one of claims 1 or 2, further comprising: a straight pipe (22), a first tee joint (23) and a second tee joint (24);

the straight pipe (22) comprises a sixth opening (25) and a seventh opening (26), the first tee joint (23) comprises an eighth opening (27), a ninth opening (28) and a tenth opening (29), and the second tee joint (24) comprises an eleventh opening (30), a twelfth opening (31) and a thirteenth opening (32);

the sixth opening (25) is connected with the eighth opening (27), and the seventh opening (26) is connected with the eleventh opening (30);

the first transverse pipe (1) and the second transverse pipe (2) are arranged in the straight pipe (22).

Technical Field

The invention relates to the technical field of water heaters and domestic hot water pipeline circulation, in particular to a pipe valve device which is suitable for the field of zero-cold water heater products and prevents hot water from flowing into a cold water pipeline when the hot water is pressurized.

Background

When the zero-cold-water heater with the hot water pressurization function in the prior art is installed and used in a water using environment without a pre-installed hot water return pipeline, the most common method is to use an H-shaped cold and hot water pipe connecting piece in the prior art to be combined with the zero-cold-water heater, the H-shaped cold and hot water pipe connecting piece is composed of a pipe barrel with a built-in one-way valve in the prior art and two tee joints (see figure 15), and the one-way valve is used for preventing water flow of a cold water pipeline from flowing into a hot water pipe in a series when a user opens a hot water faucet. The specific installation and use method is that cold and hot water pipes are connected in series by an H-shaped cold and hot water pipe connecting piece at a cold and hot water pipe opening close to a certain water using point position (usually the water using point farthest away from the water heater) in a local water using environment in the jurisdiction of the water heater, so that normal-temperature water stored in the hot water pipe can flow back to a cold water inlet of the water heater through the cold water pipe under the driving of a water circulating device of a zero-cold water heater, and is heated by the water heater and then is conveyed to the water using point connected in series by the H-shaped cold and hot water pipe connecting piece in the prior art again through the hot water pipe, and a water flow circulating ring is built in the pipe environment in such a way, so that the aim of preheating and heating water stored in the hot water pipe is fulfilled (see fig. 12).

In real life, due to different reasons such as floors, running conditions of water supply equipment, even regional differences and the like, the pressure of tap water is insufficient or unstable, the phenomena of small hot water yield, uncertain flow or unstable water pressure exist when a plurality of families use water heaters, and water heater producers can usually combine water pumps with a pressurization function to increase the pressure of a hot water pipeline to solve the problem.

However, in practical application, when the "H-shaped cold and hot water pipe connector" in the prior art is used in combination with a zero-cold water heater with a hot water pressurization function, the following problems exist: namely when a user opens a certain hot water tap in the water environment of the zero-cold water heater to use hot water (at the moment, the booster pump starts to work), since the booster pump continuously boosts the hot water pipe, when the boosted hot water is not rapidly and completely discharged from the opened hot water tap, the pressure in the hot water pipe is increased, when the pressure is larger than the resistance of the spring of the one-way valve in the H-shaped cold and hot water pipe connector in the prior art, the pressurized hot water in the hot water pipeline can push the one-way valve to reversely enter the cold water pipeline, so that the water temperature in the cold water pipeline is obviously increased (figure 13), at the moment, if a cold water tap of other water consumption points is opened, the hot water flows out, even the toilet is flushed, the phenomenon not only influences the use experience of other water users at water consumption points, but also causes unnecessary energy waste.

Disclosure of Invention

The invention provides a magnetic suction type anti-pressurization water crossing device which can solve the problem that water flow of a hot water pipeline is crossed into a cold water pipeline when a booster pump works.

In order to achieve the purpose, the invention provides the following technical scheme: the method comprises the following steps: the device comprises a first transverse pipe 1, a second transverse pipe 2 and a water flow channel opening and closing control device;

a transverse partition plate 3 is arranged in the first transverse pipe 1, the transverse partition plate 3 divides the first transverse pipe 1 into a lower cavity 4 and an upper cavity 5, the lower cavity 4 is provided with a first opening 6, and the upper cavity 5 is provided with a second opening 7;

a water passing port 8 is formed in the diaphragm plate 3, and the lower cavity 4 and the upper cavity 5 are communicated with the first opening 6 and the second opening 7 through the water passing port 8;

the second transverse pipe 2 is provided with a third opening 9 and a fourth opening 10, and the third opening 9 is connected with the second opening 7 of the upper cavity 5;

the water flow channel opening and closing control device comprises: the piston device and the water passing opening and closing device; the piston device and the water passing opening switch device are in linkage relation;

the piston device includes: a piston body 11, a piston body extension 12, a piston return spring 13, and a first magnet 14;

the piston body 11 is slidably arranged in the second transverse pipe 2, one end of the piston return spring 13 is connected with the pipe wall of one end of the third opening 9 of the second transverse pipe 2, and the other end of the piston return spring is connected with one side, facing the third opening 9, of the piston body 11; the piston body extension 12 is arranged on one side of the piston body 11 facing the third opening 9, the piston body extension 12 extends out of the third opening 9 and extends into the upper cavity 5 of the first transverse tube 1, and the first magnet 14 is arranged at the end of the piston body extension 12; the diameter of the piston body 11 is larger than the third opening 9;

the water passing opening and closing device comprises a water passing opening and closing valve plate 15, a second magnet 16 and a third magnet 17;

the water passing port switch valve plate 15 is arranged in the lower cavity 4 and is in shaft rotating connection with the pipe wall of the lower cavity 4; the second magnet 16 is arranged on the water passing opening and closing valve plate 15, and the third magnet 17 is arranged on the water passing opening and closing valve plate 15.

Preferably, the piston device further comprises: a one-way valve arrangement; a water passing hole 18 is formed in the piston body 11;

the check valve device comprises a check valve plate sleeve 19, a check valve plate 20 and a check valve plate return spring 21;

the one-way valve device is arranged on the side of the piston body 11 facing the fourth opening 10;

the water passing hole 18 on the piston body 11 at one end of the one-way valve plate sleeve 19 is communicated and butted, the one-way valve plate 20 is slidably arranged in the one-way valve plate sleeve 19, one end of the one-way valve plate return spring 21 is connected with one side of the one-way valve plate 20, the other end of the one-way valve plate return spring is connected with the pipe wall at the other end of the one-way valve plate sleeve 19, the one-way valve plate 20 is kept at a position where the water passing hole 18 on the piston body is covered in an attaching manner under the action of the one-way valve plate return spring 21, and the wall of the one-way valve plate sleeve 19 is a water permeable hollow grid; the piston body 11 has a diameter larger than the fourth opening 10.

Preferably, the method further comprises the following steps: a straight tube 22, a first tee 23 and a second tee 24;

the straight tube 22 comprises a sixth opening 25 and a seventh opening 26, the first tee 23 comprises an eighth opening 27, a ninth opening 28 and a tenth opening 29, and the second tee 24 comprises an eleventh opening 30, a twelfth opening 31 and a thirteenth opening 32;

the sixth opening 25 is connected to the eighth opening 27, and the seventh opening 26 is connected to the eleventh opening 30;

the first transverse pipe 1 and the second transverse pipe 2 are both arranged in the straight pipe 22.

Through implementing above technical scheme, have following technological effect: according to the magnetic attraction type pressure-increase-prevention water crossing device provided by the invention, the water flow direction generated in the pipeline and the change of the pressure of the cold water pipe and the hot water pipe when the cold water faucet and the hot water faucet are switched on and off are utilized to drive the positions of all parts to move, so that the purpose of controlling the opening and closing of the water flow channel is realized, the problem that the hot water flow with increased pressure in the hot water pipeline is crossed into the cold water pipeline when the booster pump works is solved, the use is more convenient, and the application effect of more energy conservation can be realized.

Drawings

FIG. 1 is a cross-sectional view of the relationship between the position of the first horizontal tube, the diaphragm, the lower chamber, the upper chamber and the openings;

FIG. 2 is a cross-sectional view of the second cross tube opening;

FIG. 3 is a schematic view of the piston body with the check valve assembly and the water passing hole, the piston body extension section and the first magnet position;

FIG. 4 is a top plan view of the piston body with the check valve assembly and the water passing holes and the position of the first magnet;

FIG. 5 is a schematic diagram showing the structural section of a valve plate of the water through opening switch and the position relationship between a second magnet and a third magnet;

FIG. 6 is a schematic diagram showing the positional relationship of the components of one embodiment in a non-pressurized, non-flowing water conduit environment;

FIG. 7 is a schematic diagram showing the positional relationship of the components of the second embodiment in a non-pressure, non-water flow pipe environment;

FIG. 8 is a schematic illustration of the position of the components in the first embodiment of the present invention as the circulating water flows through the invention;

FIG. 9 is a schematic view showing the positional relationship of the components and the water flow when the hot water tap is opened in the environment of the pipeline according to the first embodiment;

FIG. 10 is a schematic view showing the positional relationship of the components in the second embodiment when the circulating water flows through the present invention;

FIG. 11 is a schematic view showing the positional relationship of the components and the water flow when the hot water faucet is opened in the environment of the pipeline according to the second embodiment;

FIG. 12 is a schematic view of the installation location and the path of the circulating water flow in the pipe environment when the prior art "H-shaped cold and hot water pipe connection" or the present invention is used in combination with a zero-cold water heater;

FIG. 13 is a schematic view of a hot water flow path (and a pressurized water flow flowing into a cold water pipe) after a hot water tap is opened when a booster pump works when a zero-cold water heater is matched with an H-shaped cold and hot water pipe connector in the prior art;

FIG. 14 is a schematic diagram of the hot water flow path of the booster pump during operation after opening the hot water tap when the present invention is compatible with a zero cold water heater;

FIG. 15 is a schematic structural view of an "H-shaped cold and hot water pipe connector" in the prior art;

description of the main element symbols: a is the water point cold water mouth of pipe that comes, B is the cold water mouth of water point muddy water valve, C is the water point hot water mouth of pipe that comes, D is the hot water mouth of water point muddy water valve, E is the mounted position of the zero cold water heater that has the pressure boost function, F is the hot water export of water heater, G is the cold water import of water heater, H is the cold water house steward of entrying, I is the cold water pipe, J is the hot water pipe, K is the cold and hot water piping connection spare mounted position of installation prior art H type, L is other water points of using in the same pipeline environment, M is the check valve of prior art.

Detailed Description

In order to better understand the technical solution of the present invention, the following detailed description of the embodiments of the present invention is provided with reference to fig. 1 to 15.

The first embodiment is as follows: a magnetism is inhaled formula and is prevented pressure boost cluster water installation includes: the device comprises a first transverse pipe 1, a second transverse pipe 2 and a water flow channel opening and closing control device;

a transverse partition plate 3 is arranged in the first transverse pipe 1, the transverse partition plate 3 divides the first transverse pipe 1 into a lower cavity 4 and an upper cavity 5, the lower cavity 4 is provided with a first opening 6, and the upper cavity 5 is provided with a second opening 7;

a water passing port 8 is formed in the diaphragm plate 3, and the lower cavity 4 and the upper cavity 5 are communicated with the first opening 6 and the second opening 7 through the water passing port 8;

the second transverse pipe 2 is provided with a third opening 9 and a fourth opening 10, and the third opening 9 is connected with the second opening 7 of the upper cavity 5;

the water flow channel opening and closing control device comprises: the piston device and the water passing opening and closing device; the piston device and the water passing opening switch device are in linkage relation;

the piston device includes: a piston body 11, a piston body extension 12, a piston return spring 13, and a first magnet 14;

the piston body 11 is slidably arranged in the second transverse pipe 2, one end of the piston return spring 13 is connected with the pipe wall of one end of the third opening 9 of the second transverse pipe 2, and the other end of the piston return spring is connected with one side, facing the third opening 9, of the piston body 11; the piston body extension 12 is arranged on one side of the piston body 11 facing the third opening 9, the piston body extension 12 extends out of the third opening 9 and extends into the upper cavity 5 of the first transverse tube 1, and the first magnet 14 is arranged at the end of the piston body extension 12; the diameter of the piston body 11 is larger than the third opening 9;

the water passing opening and closing device comprises a water passing opening and closing valve plate 15, a second magnet 16 and a third magnet 17;

the water passing port switch valve plate 15 is arranged in the lower cavity 4 and is in shaft rotating connection with the pipe wall of the lower cavity 4; the second magnet 16 is arranged on the water passing opening and closing valve plate 15, and the third magnet 17 is arranged on the water passing opening and closing valve plate 15;

in this embodiment, the water passing opening/closing valve plate 15 has an integral wing shape (see fig. 5) defined by an axial center, the second magnet 16 is disposed at one end of the water passing opening/closing valve plate 15 that can cover the water passing opening 8, the third magnet 17 is disposed at the other end of the water passing opening/closing valve plate 15 that is defined by the axial center in the same polar direction, and both the second magnet 16 and the third magnet 17 have a polar direction attracting the first magnet 14 and can respectively attract the first magnet 14 within an effective range;

in this embodiment, a certain gap is left between the piston body 11 and the inner wall of the second horizontal tube 2, the piston body 11 can slide in the second horizontal tube 2 under the action of water flow impact or the piston return spring 13, and simultaneously, water flow from any side can also pass through the gap between the piston body 11 and the inner wall of the second horizontal tube 2; the fourth opening 10 only blocks the piston body 11 so that the piston body does not fall out of the second transverse tube 2, and when the piston body 11 is tightly attached to the fourth opening 10, water flow is not prevented from flowing out of the fourth opening 10;

in this embodiment, when no water flow occurs on both sides of the first opening 6 and the fourth opening 10 and the water pressures on both sides are consistent (at this time, the cold and hot water faucet in the zero-cold water heater pipeline environment is in a closed state), under the action of the piston return spring 13, the piston body 11 is at an initial standby position close to the fourth opening 10, at this time, the third magnet 17 disposed on the water outlet switch valve plate 15 is opposite to the first magnet 14 disposed at the end of the piston body extension 12, and is in a mutual attraction range, under the action of the mutual attraction force between the third magnet 17 and the first magnet 14, the water outlet switch valve plate 15 keeps the water outlet 8 in an open state, and the water flow passage of the first opening 6 to the fourth opening 10 keeps an unblocked state; (see FIG. 6)

When water flow flowing to the fourth opening 10 occurs on one side of the first opening 6 (at this time, circulating water flow generated by running of a circulating pump of a zero-water-cooling water heater), the water passing opening 8 is in an open state, the circulating water flow enters the lower cavity 4 through the first opening, then enters the upper cavity 5 through the water passing opening 8, then enters the second transverse pipe 2 through the second opening 7 and the third opening 9, and then flows out from the fourth opening 10 through a gap between the piston body 11 and the inner wall of the second transverse pipe 2; (see FIG. 8)

In this embodiment, when the fourth opening 10 is flowing to the first opening 6 (when the zero-cold water heater booster is activated due to the pipe environment of the zero-cold water heater being opened), when the momentum of the water flow entering the second cross pipe 2 from the fourth opening 10 is enough to overcome the resistance of the piston return spring 13 to the piston body 11 (when the water flow from the fourth opening 10 flows to the first opening 6 through the gap between the piston body 11 and the pipe wall of the second cross pipe 2), the piston body 11 is pushed to slide toward the third opening 9 to a position closing the third opening 9, and the piston body extension 12 is displaced toward the water passing opening 8, so that the first magnet 14 disposed at the end of the piston body extension 12 is separated from the attraction range of the third magnet 17, entering the attraction range with the second magnet 16, under the interaction of the first magnet 14 and the second magnet 16, the flow passage switch valve plate 15 instantly rotates to close the flow passage 8, and the water flow is prevented from entering the upper cavity 5 from the flow passage 8 (see fig. 9); when the pressures at the two sides of the first opening 6 and the fourth opening 10 are recovered to be consistent, under the action of the piston return spring 13, the piston body 11 is recovered to be separated from the third opening 9, and is close to the initial standby position of the fourth opening 10 again, the first magnet 14 arranged at the end of the piston body extension part 12 moves back along with the piston body extension part, is separated from the attraction range with the second magnet 16, and enters the attraction range with the third magnet 17 again, and under the action of the first magnet 14 and the third magnet 17, the water passing opening and closing valve plate 15 rotates to be recovered to the position for opening the water passing opening 8; at this time, the water flow passage between the first opening 6 and the fourth opening 10 is restored to be open (see fig. 6);

it should be noted in particular that, when the said excess water opening and closing valve plate 15 is in the position of closing the said excess water opening 8, even if the pressure outside the fourth opening 10 is reduced, the piston body 11 moves back to cause the first magnet 14 to move back to the attraction range with the third magnet 17, but as long as the water port switch valve plate 15 receives a pressure from the side of the first opening 6 which is greater than the attractive force between the first magnet 14 and the third magnet 17, the water outlet switch valve plate 15 can also continuously keep the first opening 6 in a closed state, prevent the water flow from the first opening 6 from entering the upper cavity 5 until the pressure on one side of the first opening 6 returns to normal, after the water pressure at one side of the fourth opening 10 is recovered to be consistent, the water passing opening and closing valve plate 15 can open the water passing opening 8 under the action of the first magnet 14 and the third magnet 17;

in this embodiment, the first magnet 14, the second magnet 16 and the third magnet 17 change positions due to changes in water flow directions and pressure conditions at two sides of the first opening 6 and the fourth opening 10, and the rotation of the water passing opening and closing valve plate 15 is controlled by the alternate adsorption of the first magnet 14, the second magnet 16 and the third magnet 17, respectively, so as to realize the function of opening or closing the water passing opening 8; compared with the traditional scheme of controlling the water passing opening switch valve plate 15 by using a spring, the force required by the transverse shearing movement between the magnets is far smaller than the vertical attraction force between the magnets, so that the coordinated control on the water passing opening switch valve plate 15 can be realized more favorably according to the water flow direction and pressure change, the reaction speed of the water passing opening switch valve plate 15 can be obviously improved when the water flow and pressure conditions change, the sealing function of the water passing opening switch valve plate 15 on the water passing opening 8 can be better realized, the technical function can be realized in a narrow space more favorably, and the related material cost is reduced; in an actual comparison test, when a circulating water flow with a large flow passes through the water passing opening switch valve plate 15 controlled by a spring, the water passing opening switch valve plate 15 is very easy to be closed by water flow impact, and the risk of influencing the normal passing of the circulating water flow exists.

In other embodiments, the third magnet 17 may be disposed on the wall of the lower chamber 4 at a position corresponding to the second magnet 16, but it should be noted that the attractive force between the first magnet 14 and the second magnet 16 is greater than the attractive force between the second magnet 16 and the third magnet 17; thereby under the prerequisite of guaranteeing that the normal work circulation rivers of zero cold water heater circulating pump normally pass through, both can realize preventing cold water pipe cold water and get into the effect of hot-water line, can also avoid being stricken into the phenomenon of cold water pipeline by the hot water rivers in the hot-water line of pressure boost when the user opens hot water tap, bring more comfortable application experience for the user, also have more energy-conserving application effect (see fig. 14).

On the basis of the first embodiment, in the second embodiment, more specifically, the piston device further includes: a one-way valve arrangement; a water passing hole 18 is formed in the piston body 11;

the check valve device comprises a check valve plate sleeve 19, a check valve plate 20 and a check valve plate return spring 21; (see FIG. 3)

The one-way valve device is arranged on the side of the piston body 11 facing the fourth opening 10;

the water passing hole 18 on the piston body 11 at one end of the one-way valve plate sleeve 19 is communicated and butted, the one-way valve plate 20 is slidably arranged in the one-way valve plate sleeve 19, one end of the one-way valve plate return spring 21 is connected with one side of the one-way valve plate 20, the other end of the one-way valve plate return spring is connected with the pipe wall at the other end of the one-way valve plate sleeve 19, the one-way valve plate 20 is kept at a position where the water passing hole 18 on the piston body is covered in an attaching manner under the action of the one-way valve plate return spring 21, and the wall of the one-way valve plate sleeve 19 is a water permeable hollow grid; the diameter of the piston body 11 is larger than that of the fourth opening 10;

in this embodiment, the piston body 11 and the inner wall of the second horizontal tube 2 are slidably tightly combined, so that the bidirectional water flow from both sides of the piston body 11 can not or only very little pass through the gap between the piston body 11 and the inner wall of the second horizontal tube 2, and when the piston body 11 is close to the fourth opening 10 under the action of the piston return spring 13, the outer diameter of the piston body 11 can completely close the fourth opening 10; in this embodiment, the piston body 11 is mainly moved to the position of the third opening 9 by the pressure change on both sides of the piston body 11, so as to improve the response speed of the invention to the opening action of the hot water faucet to the greatest extent;

in this embodiment, when no water flow occurs on both sides of the first opening 6 and the fourth opening 10 and the water pressures on both sides are consistent (at this time, the cold and hot water faucet in the zero-cold water heater pipeline environment is in a closed state), the piston body 11 is at an initial standby position close to the fourth opening 10 under the action of the piston return spring 13, and in this embodiment, when the piston body 11 is close to the fourth opening 10, the ring opening of the fourth opening 10 can be completely closed; under the action of the check valve plate return spring 21, the check valve plate 20 is in a position close to the water through hole 18 on the piston body 11, no water flow from the outside of the fourth opening 10 can enter the second transverse pipe 2 and flow out of the third opening 9, at this time, the first magnet 14 arranged at the end of the piston body extension 12 is opposite to the third magnet 17 arranged on the water through opening and closing valve plate 15, and is in a mutual attraction range, under the action of the mutual attraction force of the third magnet 17 and the first magnet 14, the water through opening 8 is kept in an open state, and at this time, the water flow passage from the first opening 6 to the fourth opening 10 is kept in an unblocked state; (see FIG. 7)

When water flow flowing to the fourth opening 10 occurs on one side of the first opening 6 (at this time, circulating water flow occurring when a circulating pump of a zero-water-cooling water heater operates), the water passing port 8 is in an open state at this time, the circulating water flow enters the lower cavity 4 through the first opening, then enters the upper cavity 5 through the water passing port 8, and then enters the second transverse pipe 2 through the second opening 7 and the third opening 9, at this time, because the impact force of the circulating water flow is greater than the thrust of the one-way valve plate return spring 21 to the one-way valve plate 20, the circulating water flow can push the one-way valve plate 20 to be separated from the water passing hole 18, and the circulating water flow flows to the outer side of the fourth opening 10 through the water passing hole 18; (see FIG. 10)

In this embodiment, when the pressure on the side of the first opening 6 suddenly decreases (in this case, because the hot water tap is opened in the zero-cold water heater pipeline environment, and the zero-cold water heater pressurization device is started to operate), the pressure on the side of the piston body 11 from the side of the fourth opening 10 is significantly greater than that on the side of the first opening 6, and this pressure is enough to offset the resistance of the piston return spring 13 to the piston body 11, the piston body 11 is pushed by the pressure to slide towards the third opening 9 to a position where the third opening 9 is tightly closed, and simultaneously the piston body 12 is displaced towards the water passing opening 8, the first magnet 14 arranged at the end of the piston body 12 is separated from the attraction range of the third magnet 17 and enters the attraction range of the second magnet 16, under the attraction effect of the first magnet 14 and the second magnet 16, the water gap switch valve plate 15 rotates instantly to close the water gap 8, and any water flow is prevented from entering the upper cavity 5 from the outer side of the water gap 8 (see fig. 11); when the water flow on the two sides of the first opening 6 and the fourth opening 10 disappears and the water pressure is recovered to be consistent, under the action of the piston return spring 13, the piston body 11 is recovered to be separated from the third opening 9, and is close to the initial standby position of the fourth opening 10 again, the first magnet 14 arranged at the end of the piston body extension 12 moves back along with the piston body extension, is separated from the attraction range with the second magnet 16, and enters the attraction range with the third magnet 17 again, under the action of the first magnet 14 and the third magnet 17, the water flow passage between the first opening 6 and the fourth opening 10 is recovered to be unblocked (see fig. 7);

in this embodiment, the piston 11 with the one-way valve is slidably combined with the wall of the cavity of the second horizontal tube 2 without a gap, so as to improve the response speed and sensitivity to the action of opening the hot water faucet to the maximum extent, and to perform the best function even in the state of small opening degree of the hot water faucet;

in other embodiments, the check valve device can be replaced by other check valves, such as a duckbill valve, which is correspondingly installed at the position of the water through hole 18 and can also function as the check valve device of the present embodiment; thereby guaranteeing that zero cold water heater circulating pump normally works, under the prerequisite that six normal passes through of circulating water, both can realize preventing cold water pipe cold water and get into the effect of hot-water line, can also avoid being stricken into the phenomenon of cold water pipeline by the hot water rivers in the hot-water line of pressure boost when the user opens hot tap, bring more comfortable application for the user and experience, also have more energy-conserving application effect.

On the basis of the first embodiment or the second embodiment, in the third embodiment, more specifically, the magnetic attraction type pressure-increase-prevention water crossing device further includes: a straight tube 22, a first tee 23 and a second tee 24;

the straight tube 22 comprises a sixth opening 25 and a seventh opening 26, the first tee 23 comprises an eighth opening 27, a ninth opening 28 and a tenth opening 29, and the second tee 24 comprises an eleventh opening 30, a twelfth opening 31 and a thirteenth opening 32;

the sixth opening 25 is connected to the eighth opening 27, and the seventh opening 26 is connected to the eleventh opening 30;

the first transverse pipe 1, the second transverse pipe 2 and the water flow channel opening and closing control device are all arranged in the straight pipe 22;

in practical application, the twelfth opening 31 is connected with a hot water pipe orifice C communicated with a hot water outlet F of the water heater, and the thirteenth opening 32 is connected with a hot water inlet D of the water point mixing valve; the ninth opening 28 is connected with a cold water pipe orifice A connected with a cold water inlet G of the water heater, and the tenth opening 29 is connected with a cold water inlet B of a water point mixing valve; thereby guaranteeing that zero cold water heater circulating pump normally works, under the prerequisite that circulating current normally passes through, both can realize preventing cold water pipe cold water entering hot-water line's effect, can also avoid being stricken into the phenomenon of cold water pipeline by the hot water rivers in the hot-water line of pressure boost when the user opens hot water tap, bring more comfortable application for the user and experience, also have more energy-conserving application effect (see fig. 14).

While the magnetic attraction type pressure-increase-prevention water-crossing device provided by the embodiment of the present invention has been described in detail, for those skilled in the art, there are variations in the specific implementation manners and the application ranges according to the concepts of the embodiment of the present invention, and in summary, the contents of the present disclosure should not be construed as limiting the present invention.