CN112524290A

CN112524290A - Self-adjusting check valve assembly of circulating water heater and zero-cold-water gas water heater system

Info

Publication number: CN112524290A
Application number: CN202011372833.2A
Authority: CN
Inventors: 段裘铭; 王启栋; 梁稳; 金晶
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-03-19
Anticipated expiration: 2040-11-30
Also published as: CN112524290B

Abstract

The invention discloses a self-adjusting check valve assembly of a circulating water heater and a zero-cold-water gas water heater system, and belongs to the technical field of zero-cold-water gas water heaters. The self-adjusting one-way valve assembly comprises a connector tube, a one-way valve, a first magnetic piece, a sliding rod and a second magnetic piece, wherein one end of the connector tube is provided with a first connector and a second connector which are communicated, the other end of the connector tube is provided with a third connector and a fourth connector which are communicated, and the one-way valve is fixed in the middle of the connector tube; the first magnetic part is fixed on a valve core of the one-way valve, the sliding rod is fixed in the interface tube, and the moving direction of the sliding rod is vertical to that of the valve core; the second magnetic piece is fixed on the sliding rod, and one end of the second magnetic piece, which is opposite to the first magnetic piece, is a same-name magnetic pole. The invention realizes the automatic connection of the second interface and the fourth interface under the action of water flow, thereby realizing the automatic opening of the circulation loop.

Description

Self-adjusting check valve assembly of circulating water heater and zero-cold-water gas water heater system

Technical Field

The invention relates to the technical field of zero-cold-water gas water heaters, in particular to a self-adjusting check valve assembly of a circulating water heater and a zero-cold-water gas water heater system.

Background

The zero-cold-water gas water heater system is provided with a circulating loop, when water is not used, the circulating water heater is automatically started to heat water in the circulating loop, the distance between a water end and the circulating loop is more than that between a water end and the water heater, so that hot water in the circulating loop comes out firstly when water is used, and zero cold water is realized. The reliability of the structure at the joint of the hot water pipe and the water return pipe directly influences the effect of zero cold water, but in the prior art, the interface at the joint of the hot water pipe and the water return pipe is unreliable, so that the self-starting of the circulation loop is poor, and the circulation flow is small.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a self-adjusting check valve assembly of a circulating water heater and a zero-cold-water gas water heater system.

The invention solves the technical problems through the following technical scheme:

a self-adjusting one-way valve assembly for a circulating water heater, comprising:

the connector comprises a connector tube and a one-way valve, wherein one end of the connector tube is provided with a first connector and a second connector which are communicated, the other end of the connector tube is provided with a third connector and a fourth connector which are communicated, the one-way valve is fixed in the middle of the connector tube, and the water outlet end of the one-way valve is communicated with the fourth connector;

the first magnetic part is fixed on the valve core of the one-way valve and is positioned at the water outlet end of the one-way valve;

the sliding rod is fixed in the interface tube and is elastically connected with the interface tube in the axial direction of the fourth interface, and the movement direction of the sliding rod is vertical to that of the valve core; and

the second magnetic piece is fixed on the sliding rod, and one end, opposite to the first magnetic piece, of the second magnetic piece is a same-name magnetic pole; when the sliding rod is reset, the second magnetic piece is located at the fourth interface, and when water flows from the fourth interface, the distance between the first magnetic piece and the second magnetic piece is reduced.

Preferably, the check valve includes:

the valve body is fixedly connected to the interface tube and is provided with a valve port;

the valve core comprises a rod body and a core body, the rod body is connected with the valve body in a sliding mode, the core body is fixedly connected to one end of the rod body and used for controlling the opening degree of the valve port, and the other end of the rod body is fixedly connected with the first magnetic part; and

and two ends of the first elastic piece are respectively abutted against the valve core and the valve body.

Preferably, the valve body comprises a first pipe body, a first guide pipe and a connecting plate, and the outer wall surface of the first guide pipe is fixedly connected to the inner wall surface of the first pipe body through the connecting plate; the rod body penetrates through a first guide pipe, and the first elastic piece is located between the core body and the first guide pipe.

Preferably, three connecting plates are uniformly distributed on the periphery of the first guide pipe;

and/or, in the radial direction of the rod body, the first magnetic part protrudes out of the inner wall surface of the first guide pipe;

and/or one end of the first elastic piece is abutted against the core body;

and/or one end surface of the core body is locally recessed to form a first positioning groove surrounding the rod body, and the first positioning groove is used for radially positioning the first elastic piece;

and/or the other end of the first elastic piece abuts against the first guide pipe;

and/or the other end of the first elastic piece abuts against the connecting plate.

Preferably, the self-adjusting check valve assembly further comprises a sliding rod support, the sliding rod support is inserted into the mouthpiece and is connected with the mouthpiece in a sealing mode, and the sliding rod is fixed to the sliding rod support and is elastically connected with the sliding rod support.

Preferably, the slide bar bracket is provided with a slide hole in which the slide bar is inserted, and the slide bar and the slide hole are movably sealed; the middle part of the sliding hole protrudes towards the center to form a first limiting part, the sliding rod is provided with a second limiting part and a third limiting part, the second elastic piece is sleeved on the sliding rod, two ends of the second elastic piece are respectively abutted against the first limiting part and the second limiting part, and when the sliding rod is reset, the third limiting part is abutted against the sliding rod support or the mouthpiece.

Preferably, the first limiting part is annular, and the sliding rod is attached to the inner wall of the first limiting part;

and/or the sliding rod and the sliding hole are sealed through a sealing ring, and the sealing ring is sleeved at one end, extending out of the first limiting part, of the sliding rod.

Preferably, the slide bar support comprises a hollow flow control part, first water through holes are formed in the periphery of the flow control part and one end, close to the fourth connector, of the flow control part, and the slide bar and the flow control part are coaxially arranged;

and/or one end of the slide rod bracket, which penetrates into the mouthpiece, abuts against a fourth interface of the mouthpiece;

and/or the surface of the sliding rod extends outwards along the radial direction of the sliding rod to form the third limiting part, and the second magnetic piece is fixed on the third limiting part;

and/or one end of the slide bar bracket, which is abutted to a fourth interface of the interface tube, is provided with a guide part for guiding the slide bar, the slide bar penetrates through the guide part, and holes for water passing are arranged on the periphery of the guide part;

and/or one end of the slide rod bracket, which extends out of the interface tube, is provided with a handle extending along the radial direction of the slide rod bracket.

Preferably, the mouthpiece has a mounting hole and a mounting pipe section located on the side, the mouthpiece extends outwards at the mounting hole to form the mounting pipe section, the sliding rod bracket is inserted into the mounting pipe section and fixed in a sealing manner, and the part of the sliding rod bracket extending out of the mounting pipe section abuts against the end face of the mounting pipe section.

Preferably, the interface tube has a main tube section and a sub-tube section, the sub-tube section is located on a side surface of the main tube section and is respectively communicated with the main tube section, the first interface and the third interface are formed at two ends of the main tube section, and the second interface and the fourth interface are formed at two sub-tube sections respectively.

Preferably, the two branch pipe sections are positioned on the same side of the main pipe section;

and/or a positioning ring and a second positioning groove are arranged on the inner wall of the main pipe section, one end of the one-way valve is abutted against the positioning ring, and the other end of the one-way valve is axially limited through a check ring clamped in the second positioning groove;

and/or external threads are arranged at the two ends of the main pipe section and the ends of the branch pipe sections.

A zero cold water gas water heater system comprising:

the circulating water heater is provided with a first cold water connecting port and a first hot water connecting port;

the self-regulating one-way valve assembly as recited in any one of the above claims, wherein the first cold water connection port communicates with the fourth port and the first hot water connection port communicates with the second port; and

and the water using end is provided with a second cold water connecting port communicated with the third interface and a second hot water connecting port communicated with the first interface.

Preferably, the water supply device further comprises a water source, and the connecting pipelines of the first cold water connecting port and the fourth port are communicated with the water source.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows:

according to the invention, the four connectors are arranged on the connector tube, and the two magnetic pieces are arranged on the one-way valve and the sliding rod, so that the second connector and the fourth connector are automatically connected under the action of water flow, and the circulation loop is automatically opened.

Drawings

FIG. 1 is a schematic structural diagram of a zero cold water gas water heater system according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a self-adjusting check valve assembly in accordance with an embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic structural view of a self-adjusting check valve assembly in accordance with an embodiment of the present invention;

FIG. 5 is a schematic view of a check valve according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a slide bar bracket according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of a slider bar support according to an embodiment of the present invention.

Description of reference numerals:

self-adjusting check valve assembly 100

Mouthpiece 1

First interface 11

Second interface 12

Third interface 13

Fourth interface 14

Mounting hole 15

Mounting pipe section 16

Main pipe section 17

Positioning ring 171

Second positioning groove 172

Pipe segment 18

Check valve 2

Water inlet end 21

Water outlet end 22

Valve body 23

First pipe 231

First guide tube 232

Connecting plate 233

Valve core 24

Rod body 241

Core 242

First positioning groove 243

First elastic member 25

First magnetic member 3

Slide bar 4

Second stopper 41

Third position-limiting portion 42

Notch 43

Second magnetic member 5

Slide bar support 6

Slide hole 61

First bore section 611

Second bore section 612

Third aperture segment 613

First position-limiting part 62

Flow control part 63

First water passing hole 631

Guide part 64

Handle 65

Second elastic member 7

Circulation water heater 200

The first hot water connection port 210

The first cold water connection port 220

Water end 300

The second cold water connection port 320

The second hot water connection port 310

Water source 400

Hot water circuit 500

Cold water circuit 600

Circulation loop 700

Detailed Description

The present invention is further illustrated by the following examples, but is not limited thereby in the scope of the examples described below.

Referring to fig. 1, it will be appreciated that the present embodiment provides a zero cold water gas water heater system including a circulating water heater 200, a self-regulating check valve assembly 100, and a water use end 300. The circulation water heater 200 has a first cold water connection port 220 and a first hot water connection port 210, and cold water enters from the first cold water connection port 220, is heated in the circulation water heater 200, and is then output through the first hot water connection port 210. The water using end 300 is provided with a second cold water connecting port 320 and a second hot water connecting port 310; the water consuming end 300 may be a faucet. The self-regulating check valve assembly 100 includes four ports to which the first cold water connection port 220, the first hot water connection port 210, the second cold water connection port 320, and the second hot water connection port 310 are connected, respectively. The self-regulating check valve assembly 100 enables the opening and closing of the water circuit between the hydronic heater 200 and the water user 300 and the opening and closing of the circulation circuit 700 for controlling the hydronic heater 200.

The first cold water connection port 220 and the self-adjusting check valve assembly 100 are also connected to a water supply 400 to supply cold water to the circulation water heater 200 and to supply cold water to the water use end 300, and the first cold water connection port 220 and the self-adjusting check valve assembly 100 are connected through a return pipe which is connected to the water supply 400, as shown in fig. 1.

The zero cold water gas water heater system can form at least three water using loops: the first hot water connection port 210 of the circulation water heater 200, the self-regulating check valve assembly 100, and the second hot water connection port 310 of the water using end 300 are connected in sequence by pipes to form a hot water circuit 500; the water source 400, the self-regulating one-way valve assembly 100 and the second cold water connection port 320 of the water using end 300 are sequentially connected through a pipeline to form a cold water circuit 600; the first hot water connection port 210 of the circulation water heater 200, the self-regulating check valve assembly 100, and the first cold water connection port 220 of the circulation water heater 200 are sequentially connected by piping to form a circulation circuit 700. When the water end 300 is not in operation, the circulating pump of the circulating water heater 200 acts according to the system requirement, the self-regulating check valve assembly 100 is automatically switched on under the action of water pressure, and the circulating water heater 200 heats a certain amount of water in the circulating loop 700.

The self-adjusting one-way valve assembly 100 of embodiments of the present invention may be implemented by any of the embodiments described below.

Please refer to fig. 2-7 for understanding. Embodiments of the present invention provide a self-regulating one-way valve assembly 100 for a circulating water heater 200, the self-regulating one-way valve assembly 100 being usable in a zero cold water gas water heater system.

The self-adjusting one-way valve assembly 100 comprises a connector tube 1 and a one-way valve 2, wherein one end of the connector tube 1 is provided with a first connector 11 and a second connector 12 which are communicated, the other end of the connector tube 1 is provided with a third connector 13 and a fourth connector 14 which are communicated, the one-way valve 2 is fixed in the middle of the connector tube 1, the middle of the connector tube is positioned between two ends of the connector tube 1, the first connector 11 and the second connector 12 are positioned at a water inlet end 21 of the one-way valve 2, the third connector 13 and the fourth connector 14 are positioned at a water outlet end 22 of the one-way valve 2, and the water outlet end 22 of the one-way valve 2 is communicated.

Specifically, the first port 11 is connected to the second hot water connection port 310 of the water end 300, and the second port 12 is connected to the first hot water connection port 210 of the circulation water heater 200, so that the first hot water connection port 210, the second port 12, the first port 11, and the second hot water connection port 310 are connected in series to form the hot water circuit 500. The first hot water connection port 210, the second connection port 12, the check valve 2, the fourth connection port 14, and the first cold water connection port 220 are connected in this order to form the circulation circuit 700 by connecting the second cold water connection port 320 to the third connection port 13 and the first cold water connection port 220 to the fourth connection port 14.

The self-regulating valve assembly 100 further comprises a first magnetic member 3, the first magnetic member 3 being fixed to the valve element 24 of the one-way valve 2 and located at the water outlet end 22 of the one-way valve 2.

The self-adjusting check valve assembly 100 further includes a slide rod 4, the slide rod 4 being secured within the mouthpiece 1. The slide rod 4 is elastically connected to the mouthpiece 1 in the axial direction of the fourth port 14, so that the slide rod 4 can reciprocate in the direction parallel to the axial direction of the fourth port 14. The direction of movement of the slide 4 is perpendicular to the direction of movement of the spool 24.

The self-adjusting check valve assembly 100 further includes a second magnetic member 5, and the second magnetic member 5 is fixed to the slide bar 4 to reciprocate with the slide bar 4. The opposite ends of the second magnetic member 5 and the first magnetic member 3 are like magnetic poles so as to repel each other when they are close to each other. When the sliding rod 4 is reset, the second magnetic part is positioned at the fourth interface 14, when water flows in from the fourth interface 14, the valve rod slides under the action of the water flows, so that the distance between the first magnetic part 3 and the second magnetic part 5 is reduced, the first magnetic part 3 bears the acting force towards the water inlet end 21 of the one-way valve 2, and the one-way valve 2 is locked more reliably; when the circulating waterway is opened and hot water flows from the second port 12 to the fourth port 14 through the check valve 2, the valve core 24 moves towards the valve rod side under the action of water pressure, the distance between the first magnetic part 3 and the second magnetic part 5 is reduced, and the second magnetic part 5 is kept at the reset position along with the sliding rod 4.

As can be seen from the above description, the self-adjusting check valve assembly 100 according to the embodiment of the present invention realizes automatic connection of the second port 12 and the fourth port 14 by the water flow by providing four ports on the port tube 1 and two magnetic members on the check valve 2 and the sliding rod 4, so as to realize automatic opening of the circulation loop 700.

As shown in fig. 2 to 4, the check valve 2 includes a valve body 23, the above-described valve spool 24, and a first elastic member 25. The valve body 23 is fixed to the mouthpiece 1 and has a valve port, the outer wall surface of the valve body 23 is hermetically connected to the inner wall surface of the mouthpiece 1, and the valve body 23 houses the valve element 24. The valve core 24 includes a rod 241 and a core 242, the rod 241 is slidably connected to the valve body 23, and the moving direction of the rod is the axial direction of the valve body 23. The core 242 is fixed to one end of the rod 241 and is used to control the opening of the valve port, and the other end of the rod 241 is fixed to the first magnetic member 3. Both ends of the first elastic member 25 abut against the core 242 and the valve body 23, respectively, so that when the check valve 2 does not receive any other acting force, the valve body 24 blocks the valve port, and the check valve 2 is kept in the off state.

The valve body 23 includes a first pipe 231, a first guide pipe 232 and a connecting plate 233, the first pipe 231 and the first guide pipe 232 are coaxially arranged, a space for accommodating the valve element 24 is formed in the first pipe 231, the first elastic element 25, the first guide plate and the connecting plate 233 are arranged, the first guide pipe 232 and the connecting plate 233 are located at one end of the first pipe 231, the outer wall surface of the first guide pipe 232 is fixedly connected to the inner wall surface of the first pipe 231 through the connecting plate 233, in the embodiment, three connecting plates 233 are uniformly distributed around the first guide pipe 232, and a flowing space is provided for flowing water between the adjacent connecting plates 233. The rod 241 penetrates through the first guide tube 232, and the valve element 24 and the first magnetic element 3 are located at two ends of the first guide tube 232, wherein, in the radial direction of the rod 241, the first magnetic element 3 protrudes outwards from the inner wall surface of the first guide tube 232, so as to improve the reliability.

The first elastic member 25 is located between the core 242 and the first guide tube 232. One end of the first elastic member 25 abuts on the core 242. One end face of the core 242 is partially recessed to form a first positioning groove 243 surrounding the rod body 241, the first elastic element 25 is inserted into the first positioning groove 243, and preferably, the periphery of the first elastic element 25 is in contact with the wall face of the first positioning groove 243, so that the first elastic element 25 is radially positioned, and the stability and reliability of the check valve 2 are improved. The other end of the first resilient member 25 abuts on the first conduit and/or web 233.

As shown in fig. 2, 3, 5, 6, 7, the self-adjusting check valve assembly 100 further includes a slide rod bracket 6 for resiliently connecting the slide rod 4 to the mouthpiece 1. The sliding rod bracket 6 is inserted on the interface tube 1 and is connected with the interface tube 1 in a sealing way, and the sliding rod 4 is fixed on the sliding rod bracket 6 and is elastically connected with the sliding rod bracket so as to reciprocate in a direction parallel to the axis of the fourth interface 14.

The slide rod bracket 6 is provided with a slide hole 61, the slide rod 4 is inserted in the slide hole 61 and can reciprocate along the slide hole 61, and the slide rod 4 is movably and hermetically connected with the slide hole 61. The middle part of the sliding hole 61 protrudes towards the center to form a first annular limiting part 62, the sliding rod 4 passes through the middle part of the first limiting part 62, and preferably, the surface of the sliding rod 4 is attached to the inner wall surface of the first limiting part 62, so that the sealing performance is improved. The slide bar 4 has a second position-limiting portion 41 and a third position-limiting portion 42, the second position-limiting portion 41 is located in the middle of the slide bar 4, the second position-limiting portion 41 can be formed by setting the slide bar 4 as a stepped shaft, and the third position-limiting portion 42 is located at a position close to the end of the slide bar 4; the second elastic piece 7 is positioned in the mouthpiece 1, the second elastic piece 7 is sleeved on the slide bar 4, and two ends of the second elastic piece are respectively abutted against the first limiting part 62 and the second limiting part 41 to assist the slide bar 4 to realize reciprocating motion; when the slide bar 4 is reset, the third limiting part 42 abuts against the slide bar bracket 6 or the mouthpiece 1. One end of the slide rod 4 extending out of the first limiting part 62 is provided with a sealing ring, and the inner ring and the outer ring of the sealing ring are respectively attached to the outer wall surface of the slide rod 4 and the inner wall surface of the slide hole 61, so that the slide rod 4 and the slide hole 61 are hermetically connected.

The slide hole 61 may also be understood as having a first hole segment 611, a second hole segment 612, and a third hole segment 613 connected in sequence, the aperture of the first hole segment 611 and the aperture of the third hole segment 613 are both larger than the aperture of the second hole segment 612, the position of the second hole segment 612 corresponds to the position of the first stopper portion 62, the third hole segment 613 may communicate with the outside, and the first hole segment 611 communicates with the inside of the mouthpiece 1. The second resilient member 7 is disposed within the first bore section 611 and the sealing ring is disposed within the third bore section 613.

The slide rod bracket 6 further comprises a hollow flow control part 63, a first water through hole 631 is formed around the flow control part 63 and at one end close to the fourth port 14, and the slide rod 4 and the flow control part 63 are coaxially arranged. Wherein, the flow control part 63 is located at a junction position, the flow control part 63 is located between the water outlet end 22 of the one-way valve 2 and the third port 13, and one end of the flow control part 63 is located at the fourth port 14; the first water through hole 631 is formed in the flow control part 63, so that the communication between the fourth port 14 and the third port 13 and the communication between the fourth port 14 and the water outlet end 22 of the one-way valve 2 are realized, and when the flow control part 63 is rotated to change the position relation between the flow control part and the port pipe 1, the water flow can be adjusted. In addition, the flow control part 63 can be understood as a barrel-shaped structure, and the end surface and the side wall of the barrel-shaped structure are provided with a first water through hole 631, the end part of the barrel-shaped structure abuts against the inside of the mouthpiece 1, and the sliding rod 4 is arranged coaxially with the barrel-shaped structure.

One end of the sliding rod bracket 6, which penetrates into the interface tube 1, abuts against the fourth interface 14 of the interface tube 1, so that the structural stability and reliability are improved. In this embodiment, one end of the slide rod bracket 6 extending into the mouthpiece 1 is an end of the flow control portion 63.

The third stopper 42 is annular. A notch 43 is formed on one side of the third limiting part 42 facing the one-way valve 2, and the second magnetic member 5 is fixed at the notch 43 of the third limiting part 42. When the slide rod 4 is reset, the third position-limiting portion 42 and the second magnetic member 5 are both located close to the fourth interface 14.

One end of the slide rod bracket 6, which is abutted against the interface tube 1, is provided with a guide part 64 for guiding the slide rod 4, the guide part 64 is annular, and the slide rod 4 penetrates through the guide part 64 and can slide along the guide part 64; the guide 64 may be connected to the rest of the slide bar carrier 6 by several rib plates. Holes for water passing are formed around the guide portion 64, and the holes are the first water passing holes 631. The end of the slide bar bracket 6 extending out of the mouthpiece 1 is also provided with a handle 65 extending in the radial direction of the slide bar bracket 6, and the handle 65 can be held by hand for operation when the slide bar bracket is removed, assembled, adjusted and maintained, thereby improving efficiency.

The mouthpiece 1 has a mounting hole 15 and a mounting tube section 16 on the side, the mounting hole 15 being located opposite the fourth mouthpiece 14. The interface tube 1 extends outwards at the mounting hole 15 to form the mounting tube section 16, the sliding rod bracket 6 is inserted into the mounting tube section 16 and is fixed with the mounting tube section 16 in a sealing manner, and the part of the sliding rod bracket 6 extending out of the mounting tube section 16 is abutted against the end face of the mounting tube section 16.

The interface tube 1 has a main tube section 17 and a sub-tube section 18, the sub-tube section 18 is located on the same side of the main tube section 17 and is respectively communicated with the main tube section 17, the two ends of the main tube section 17 form the first interface 11 and the second interface 12, and the two sub-tube sections 18 form the second interface 12 and the fourth interface 14. The above-mentioned mounting tube section 16 is arranged coaxially with the fourth tube section and on opposite sides of the main tube section 17. The main pipe section 17, the branch pipe section 18 and the installation pipe section 16 may be integrally formed. External threads are arranged on the outer wall surfaces of the main pipe section 17, the air pipe section and the mounting pipe section 16 and are used for connecting a water pipe.

The inner wall of the main pipe section 17 is provided with a positioning ring 171 and a second positioning groove 172 in an ascending way, one end of the one-way valve 2 is abutted to the positioning ring 171, the other end of the one-way valve is axially limited through a retaining ring in the second positioning groove 172, and axial movement is avoided.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A self-adjusting check valve assembly for a water circulating heater, comprising:

2. A self-adjusting one-way valve assembly as recited in claim 1, wherein the one-way valve comprises:

3. The self-adjusting check valve assembly of claim 2, wherein the valve body comprises a first tubular body, a first guide tube, and a connecting plate, an outer wall surface of the first guide tube being secured to an inner wall surface of the first tubular body by the connecting plate; the rod body penetrates through a first guide pipe, and the first elastic piece is located between the core body and the first guide pipe.

4. A self-adjusting one-way valve assembly as recited in claim 3,

three connecting plates are uniformly distributed on the periphery of the first guide pipe;

and/or one end of the first elastic piece is abutted against the core body;

5. A self adjusting check valve assembly as recited in claim 1, further comprising a slide rod bracket that is inserted into and sealingly connected to the interface tube, the slide rod being secured to and resiliently connected to the slide rod bracket.

6. The self-adjusting check valve assembly of claim 5, wherein the slide rod bracket has a slide bore into which the slide rod is inserted, the slide rod being movably sealed with the slide bore; the middle part of the sliding hole protrudes towards the center to form a first limiting part, the sliding rod is provided with a second limiting part and a third limiting part, the second elastic piece is sleeved on the sliding rod, two ends of the second elastic piece are respectively abutted against the first limiting part and the second limiting part, and when the sliding rod is reset, the third limiting part is abutted against the sliding rod support or the mouthpiece.

7. A self-adjusting one-way valve assembly as recited in claim 6,

the first limiting part is annular, and the sliding rod is attached to the inner wall of the first limiting part;

8. A self-adjusting one-way valve assembly as recited in claim 6,

the slide bar bracket comprises a hollow flow control part, first water through holes are formed in the periphery of the flow control part and one end, close to the fourth connector, of the flow control part, and the slide bar and the flow control part are coaxially arranged;

9. A self-adjusting check valve assembly as recited in claim 5, wherein the interface tube has a laterally disposed mounting aperture and a mounting tube segment, the interface tube extending outwardly at the mounting aperture to form the mounting tube segment, the slide rod bracket being received in and sealingly secured to the mounting tube segment, the portion of the slide rod bracket extending beyond the mounting tube segment abutting an end surface of the mounting tube segment.

10. The self-adjusting check valve assembly of claim 1, wherein the interface tube has a main tube section and sub-tube sections flanking the main tube section and communicating with the main tube section, respectively, both ends of the main tube section forming the first and third interfaces, and both of the sub-tube sections forming the second and fourth interfaces, respectively.

11. A self-adjusting one-way valve assembly as recited in claim 10,

the two branch pipe sections are positioned on the same side of the main pipe section;

12. A zero cold water gas water heater system, comprising:

the self-adjusting one-way valve assembly of any one of claims 1-11, the first cold water connection port being in communication with the fourth port, the first hot water connection port being in communication with the second port; and

13. The zero-cold-water gas water heater system of claim 12, further comprising a water source, the connecting lines of the first cold water connection port and the fourth port being in communication with the water source.