CN111473132A

CN111473132A - Water mixing prevention valve and water heater water supply system using same

Info

Publication number: CN111473132A
Application number: CN202010155394.3A
Authority: CN
Inventors: 吴帅; 朱海龙; 魏苗苗
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-07-31
Anticipated expiration: 2040-03-09
Also published as: CN111473132B

Abstract

The invention relates to a water mixing prevention valve and a water supply system of a water heater using the same, wherein the water mixing prevention valve comprises a pipe body, the inside of the pipe body is axially divided into a water inlet area and a water outlet area which are mutually independent, and the pipe body is provided with a first through hole and a second through hole; the valve rod can move towards the direction far away from the second through hole under the action of water pressure; the elastic piece keeps the trend of moving the valve rod towards the direction close to the second through hole; the plugging piece can be movably arranged in the pipe body, a third through hole which can be correspondingly communicated with the first through hole is formed in the plugging piece, and the plugging piece is linked with the valve rod; the water pipe can be arranged in the pipe body in an axially moving mode along the pipe body, one end of the water pipe is connected with the end portion, facing the water outlet area, of the valve rod, the other end of the water pipe is closed and can move to the water outlet area, and a water inlet and a water outlet are formed in the peripheral wall of the water pipe. The water mixing prevention valve solves the most common bad conditions that the water tap can discharge hot water, mix water or can not discharge water when the water tap at the farthest end is used for boiling cold water.

Description

Water mixing prevention valve and water heater water supply system using same

Technical Field

The invention belongs to the technical field of water heaters, and particularly relates to a water mixing prevention valve and a water supply system of a water heater using the same.

Background

With the increasing demands of consumers on the quality of life, it is more and more common to have a "zero cold water" gas water heater with an instant heating function. When the 'zero cold water' gas water heater is installed, two practical situations are faced: with and without a return pipe. For a family provided with a water return pipeline, when a user is not in the process of using hot water, the water heater starts a self-contained circulating water pump in the water heater when detecting that the temperature of the water in the pipeline is lower than a set temperature, the water pump enables the water in the pipeline to flow into the water heater to be heated after running, the water pump stops running until the water in the pipeline is heated to a specified temperature, and the water heater also stops working.

For a household without a water return line, the gas water heater 8 will find a water consumption point 9 (i.e. a faucet) at the farthest end of the water path in the household when it is installed, and a corresponding hot water branch 821 is connected to a cold water branch 811 below the water consumption point 9, and in order to prevent cold water from flowing back into the hot water branch 821 when hot water is used, a check valve 0 is generally installed at this point, as shown in fig. 1 in particular, and this connection mode is effective in some households, but it needs to satisfy a condition that: the water resistance of the hot water branch 821 to the farthest water usage point 9 is larger than that of the cold water branch 811 to the last water usage point 9, and now it appears that the water resistance ratio of the hot water pipe 82 in the home to the farthest water usage point 9 is smaller than that of the cold water pipe 81 to the farthest water usage point 9. In this case, at the farthest water usage point 9, when the user opens the cold water, a part of the water flows from the cold water branch 811, another part of the water flows from the hot water branch 821 to generate "mixing", even if all the water flows from the hot water branch 821, which will start the water heater, and the user actually outputs hot water when wanting to use the cold water, causing great trouble to the user.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a mixing prevention valve which can prevent cold water and hot water from mixing when a user uses cold water at the farthest water using point, aiming at the current situation of the prior art.

The second technical problem to be solved by the present invention is to provide a water supply system of a water heater using the above water mixing prevention valve, which can prevent cold water and hot water from mixing when a user uses cold water at the farthest water using point, in view of the current situation of the prior art.

The third technical problem to be solved by the present invention is to provide a water supply system of a water heater using the above water mixing prevention valve, which can prevent the water heater from being opened by mistake, in view of the current situation of the prior art.

The technical scheme adopted by the invention for solving the first technical problem is as follows: a water mixing prevention valve is characterized by comprising

The water inlet pipe comprises a pipe body, a water inlet pipe body and a water outlet pipe body, wherein the pipe body is axially divided into a water inlet area and a water outlet area which are mutually independent, a first through hole for supplying hot water to flow into the pipe body and a second through hole for supplying cold water to flow into the pipe body are formed in the pipe body, and the first through hole and the second through hole are positioned in the water inlet area and are sequentially arranged at intervals along the axial direction;

the valve rod can be arranged in the water inlet area in an axially movable mode along the pipe body, is positioned at the downstream of the second through hole along the direction of cold water flow, and can move towards the direction far away from the second through hole under the action of water pressure;

the elastic piece acts on the valve rod to ensure that the valve rod keeps the trend of moving towards the direction close to the second through hole;

the plugging piece can be movably arranged in the pipe body, a third through hole which can be correspondingly communicated with the first through hole is formed in the plugging piece, the plugging piece is linked with the valve rod, the first through hole is shielded by the plugging piece in the state that the valve rod is far away from the second through hole, and the first through hole and the third through hole are correspondingly communicated in the state that the valve rod is close to the second through hole;

the water pipe can be arranged in the pipe body in an axially moving mode along the pipe body, one end of the water pipe is connected with the end portion, facing the water outlet area, of the valve rod, the other end of the water pipe is closed and can move to the water outlet area, a water inlet and a water outlet are formed in the peripheral wall of the water pipe, the water inlet is located in the water inlet area all the time, the water outlet is located in the water outlet area when the plugging piece shields the first through hole, and the water outlet is located in the water inlet area when the first through hole and the third through hole are correspondingly communicated.

The blocking piece can have various structural forms, such as a flat plate shape, but in order to reduce the occupied space in the pipe body, the blocking piece is also conveniently driven by the valve rod, the blocking piece is in a tubular shape with the outer peripheral wall contacting with the inner peripheral wall of the pipe body, the valve rod penetrates through the blocking piece, the blocking piece and the pipe body are connected with each other and have a distance, the blocking piece is axially limited in the pipe body and can rotate circumferentially relative to the pipe body, the third through hole is formed in the peripheral wall of the blocking piece, and the first through hole is formed in the peripheral wall of the pipe body. The plugging piece is also tubular, occupies a small space in the pipe body, and can be matched with the plugging piece well, the axial movement of the valve rod drives the plugging piece to rotate circumferentially, and therefore the third through hole and the first through hole are correspondingly communicated or staggered.

In order to enable the plugging piece to be driven by the valve rod to rotate circumferentially, a central ring parallel to or coincident with the axis of the plugging piece is arranged in the plugging piece, the plugging piece and the central ring are connected through a connecting strip, the central ring is sleeved on the valve rod, and the plugging piece and the central ring are in threaded connection. Therefore, when the valve rod moves axially, the plugging piece cannot move axially, so that the plugging piece can rotate circumferentially under the action of the valve rod.

In order to accelerate the axial movement of the valve rod and the circumferential rotation speed of the blocking piece, a turbine which is located at the upstream of the valve rod and can rotate circumferentially relative to the pipe body is arranged in the pipe body along the water flow direction of cold water. When the water slowly circulates, the turbine can rotate the blocking piece to promote the upward movement for closing the first through hole and the valve rod.

In order to axially limit the plugging piece, the structure is simple, two bosses which are respectively positioned at two sides of the first through hole are formed on the inner wall of the pipe body along the axial direction at intervals, and two ends of the plugging piece respectively abut against the two bosses.

In order to ensure that the valve rod can move towards the direction far away from the second through hole under the action of water pressure, a stress part is formed on the end part of the valve rod close to the second through hole along the radial direction. The setting of atress portion has increased the stress surface of valve rod, but improves the reliability that the valve rod removed under the water pressure effect.

In order to further improve the bearing surface of the valve rod, the bearing part is in a bowl shape with an opening facing away from the valve rod.

The water inlet pipe is characterized in that a partition plate is formed in the pipe body along the radial direction, a water inlet area and a water outlet area are respectively arranged on two sides of the partition plate, and a through hole through which a water supply pipe penetrates is formed in the partition plate.

In order to prevent water in the water inlet area from leaking to the water outlet area from the perforation, a water blocking piece is arranged in the pipe body and comprises a sleeve sleeved on the water pipe and a water blocking part extending along the radial direction of the sleeve, the water blocking part is arranged around the perforation in a surrounding mode, and the water blocking part plays a role in sealing the perforation and prevents water leakage.

In order to ensure that the valve rod and the water pipe can only axially move but cannot circumferentially rotate, a baffle plate positioned between the partition plate and the plugging piece is radially formed in the pipe body, the water pipe penetrates through the baffle plate, a guide plate positioned between the baffle plate and the plugging piece is radially formed on the outer peripheral wall of the water pipe, at least two guide columns are circumferentially arranged on the guide plate at intervals, each guide column axially extends along the pipe body, at least two guide holes for the guide columns to movably penetrate are circumferentially arranged on the baffle plate at intervals, the guide holes and the guide columns are matched to enable the water pipe to axially move, and at least two guide columns are circumferentially arranged at intervals, so that the circumferential rotation of the water pipe can be prevented; in addition, the valve rod can smoothly move towards the second through hole due to the arrangement of the guide hole.

The technical scheme adopted by the invention for solving the second and third technical problems is as follows: a water supply system of a water heater applying the water mixing prevention valve comprises the water heater, a cold water pipe, a hot water pipe and at least one water consumption point which is connected with the cold water pipe and the hot water pipe at the same time, wherein one end of the hot water pipe is connected with the water outlet side of the water heater, the other end of the hot water pipe is divided into at least one hot water branch which is connected with the water consumption point in a one-to-one correspondence mode, one end of the cold water pipe is connected with an external water source, the other end of the cold water pipe is divided into two branches, the first branch is connected with the water inlet side of the water heater, the second branch is divided into at least one cold water branch which is connected with the water consumption point in a one-to-one correspondence mode, the water consumption point farthest away from the water heater is in fluid communication with the water outlet area of the pipe body, the hot water branch.

Compared with the prior art, the invention has the advantages that: the water mixing prevention valve is provided with the plugging piece, when cold water is needed, the first through hole can be shielded by the plugging piece to prevent hot water from entering the pipe body, when no cold water is needed, the first through hole can be opened by the plugging piece to enable hot water to enter the pipe body, so that the problem that in a family zero-cold-water circulation pipeline, the most common water faucet is in hot water discharge, mixed water discharge or water discharge failure when the most remote water faucet (namely a water using point) is used for boiling cold water is solved, and the problem of false start of a water heater is also avoided; in addition, the anti-water mixing valve adopts a pure mechanical structure, does not depend on an electric control element and the like, has high working reliability and can be applied to families with or without a water return pipeline; all parts of preventing mixing water valve of this embodiment all locate in the body, prevent mixing water valve's volume promptly the volume of body promptly, and the volume is suitable, and the suitability is high, can generally be in all water heater products and pipelines, has also integrated the function of current check valve simultaneously.

Drawings

FIG. 1 is a schematic diagram of a prior art water supply system for a water heater;

fig. 2 is a schematic structural view of a mixing prevention valve according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2 (the first through hole and the third through hole are correspondingly communicated);

FIG. 4 is a cross-sectional view of FIG. 2 (with the first and third through-holes staggered);

FIG. 5 is an exploded view of the tube of FIG. 4 with the tube removed;

FIG. 6 is a schematic view of the closure of FIG. 5;

FIG. 7 is a schematic structural view of the turbine of FIG. 5;

FIG. 8 is a cross-sectional view of the tubular body of FIG. 5;

fig. 9 is a schematic structural view of a water supply system of a water heater to which the mixing prevention valve of fig. 2 is applied;

fig. 10 is an enlarged view of fig. 9 at a.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 2 to 10, the water mixing prevention valve of the preferred embodiment includes a pipe body 1, a valve rod 2, an elastic member 3, a blocking member 4 and a water pipe 5, a partition plate 16 is radially formed in the pipe body 1, the partition plate 16 divides the inside of the pipe body 1 into a water inlet area 11 and a water outlet area 12 which are mutually independent along an axial direction, that is, the water inlet area 11 and the water outlet area 12 are respectively disposed on two sides of the partition plate 16, a first through hole 13 through which hot water flows into the pipe body 1 and a second through hole 14 through which cold water flows into the pipe body 1 are disposed on the pipe body 1, the first through hole 13 and the second through hole 14 are both disposed in the water inlet area 11 and sequentially spaced along the axial direction of the pipe body 1, and the first through hole. In this embodiment, the first through hole 13 is disposed on the peripheral wall of the tube body 1, and one end of the tube body 1 away from the partition 16 is opened to form a second through hole 14.

As shown in fig. 3 to 5, the valve rod 2 is disposed in the water inlet area 11 in an axially movable manner along the pipe body 1, the valve rod 2 is located downstream of the second through hole 14 along the cold water flow direction, and a force receiving portion 21 is radially formed at a lower end (i.e., an end portion close to the second through hole 14) of the valve rod 2, so that the valve rod 2 can move away from the second through hole 14 (i.e., upward movement with reference to fig. 3) under the hydraulic pressure. In this embodiment, the force receiving portion 21 is in a bowl shape with an opening facing away from the valve stem 2.

The elastic member 3 acts on the valve stem 2, maintaining the tendency of the valve stem 2 to move in a direction close to the second through hole 14 (refer to fig. 3, i.e., downward movement).

As shown in fig. 3, 4, 6, and 8, in this embodiment, the blocking member 4 is a tubular shape in which the outer peripheral wall contacts the inner peripheral wall of the tube body 1, the peripheral wall of the blocking member 4 is provided with a third through hole 41 capable of communicating with the first through hole 13 correspondingly, the blocking member 4 is axially limited in the tube body 1 and can rotate circumferentially relative to the tube body 1, the inner wall of the tube body 1 is formed with two bosses 15 respectively located at two sides of the first through hole 13 along the axial direction at intervals, and two ends of the blocking member 4 respectively abut against the two bosses 15, so as to axially limit the tube body 1 in the tube body 1.

Have in the shutoff piece 4 rather than the central circle 42 that the axis is parallel, shutoff piece 4 links to each other through connecting strip 43 with central circle 42, and central circle 42 cover is established on valve rod 2 and two threaded connection to realize shutoff piece 4 and valve rod 2 and link mutually, and realize having the interval between shutoff piece 4 and the valve rod 2, thereby can not influence the rivers circulation. Thus, when the valve rod 2 moves axially, the blocking piece 4 cannot move axially, so that the blocking piece 4 rotates circumferentially under the action of the valve rod 2, the third through hole 41 and the first through hole 13 are correspondingly communicated or staggered, the blocking piece 4 blocks the first through hole 13 in a state that the valve rod 2 is far away from the second through hole 14, and the first through hole 13 and the third through hole 41 are correspondingly communicated in a state that the valve rod 2 is close to the second through hole 14.

Of course, the blocking member 4 may have other structures and be movably disposed in the pipe body 1 as long as the first through hole 13 can be opened and closed.

As shown in fig. 3 to 5, one end of the water pipe 5 is connected to the upper end (i.e., the end facing the water outlet area 12) of the valve rod 2, the other end is closed and penetrates through the partition 16, the circumferential wall of the water pipe 5 is provided with a water inlet 51 and a water outlet 52, the water inlet 51 is always located in the water inlet area 11, and the water outlet 52 is located in the water inlet area 11 in a state that the first through hole 13 and the third through hole 41 are correspondingly communicated; in a state where the blocking member 4 covers the first through hole 13, the water outlet 52 moves from the water inlet area 11 to the water outlet area 12. In this embodiment, the water pipe 5 and the valve rod 2 are integrally connected, that is, the valve rod 2 is partially designed as a hollow structure to form the water pipe 5.

The partition plate 16 is provided with a through hole 161 through which the water supply pipe 5 passes, the pipe body 1 is internally provided with a water blocking piece 7, the water blocking piece 7 comprises a sleeve 71 sleeved on the water pipe 5 and a water blocking part 72 extending along the radial direction of the sleeve 71, the water blocking part 72 is surrounded around the through hole 161, and the water blocking part 72 plays a role in sealing the through hole 161 to prevent water leakage.

In the water flow direction of the cold water, a turbine 6 which is positioned at the upstream of the valve rod 2 and can rotate relative to the circumferential direction of the pipe body 1 is arranged in the pipe body 1, the turbine 6 is rotatably arranged in a mounting pipe 61, and the mounting pipe 61 is fixedly mounted in the pipe body 1. Thus, when the water is slowly circulated, the turbine 6 can rotate the blocking piece 4 to promote the upward movement of closing the first through hole 13 and the valve rod 2.

As shown in fig. 3 to 5 and 8, a baffle 17 located between the partition 16 and the blocking member 4 is radially formed in the pipe body 1, the water pipe 5 passes through the baffle 17, a guide plate 54 is radially formed on the outer peripheral wall of the water pipe 5, the guide plate 54 is located between the baffle 17 and the blocking member 4, at least two guide posts 55 are circumferentially arranged on the guide plate 54 at intervals, each guide post 55 axially extends along the pipe body 1, at least two guide holes 171 for the guide posts 55 to movably penetrate one by one are circumferentially arranged on the baffle 17 at intervals, so that the track of the axial movement of the water pipe 5 is guided, and the valve rod 2 and the water pipe 5 are prevented from rotating circumferentially; and water flows through the guide hole 171 during the movement of the valve stem 2 toward the second through-hole 14, thereby achieving the smooth downward movement of the valve stem 2.

The outer peripheral wall of the water pipe 5 is also radially formed with a resisting part 53 positioned between the partition plate 16 and the baffle plate 17, and the resisting part 53 can be propped against the baffle plate 17 to limit the axial movement stroke of the water pipe 5. In this embodiment, the elastic element 3 is a spring, and two ends thereof respectively abut against the abutting portion 53 and the water blocking portion 72.

As shown in fig. 9 to 10, the water mixing prevention valve of the present embodiment can be used in a water supply system, the water supply system further includes a water heater 8, a cold water pipe 81, a hot water pipe 82, and four water consumption points 9 (such as taps) simultaneously connected to the cold water pipe 81 and the hot water pipe 82, one end of the hot water pipe 82 is connected to the water outlet side of the water heater 8, the other end of the hot water pipe 82 is divided into four hot water branches 821 correspondingly connected to the water consumption points 9 one by one, one end of the cold water pipe 81 is connected to an external water source, the other end of the cold water pipe is divided into two branches, the first branch is connected to the water inlet side of the water heater, and the water consumption point 9 furthest from the water heater 8 is in fluid communication with the water outlet region 12 of the tube 1, the hot water branch 821 corresponding to the furthest point of water use 9 is in fluid communication with the first through hole 13 of the tubular body 1, the cold water branch 811 corresponding to the furthest water usage point 9 is in fluid communication with the second through hole 14 of the body 1.

The operation of the anti-mixing valve of the present embodiment is as follows, and is described with reference to the most distal water usage point 9:

as shown in fig. 3, when the faucet has no cold water requirement, the valve rod 2 is located at the lowest end under the action of the elastic member 3, the water inlet 51 and the water outlet 52 of the water pipe 5 are both in the water inlet area 11, the first through hole 13 and the third through hole 41 are correspondingly communicated, at this time, the hot water branch 821 corresponding to the water using point 9 at the farthest end is communicated with the cold water branch 811, the water heater 8 can perform normal circulating preheating, and circulating water flows from the hot water branch 821 through the blocking member 4 and the turbine 6, and then flows into the cold water branch 811, so as to form a circulating loop;

as shown in fig. 4, when the water consumption point is opened on the cold water side, that is, when there is a cold water demand, the second through hole 14 tends to flow water, and at this time, the water inlet 51 and the water outlet 52 of the water pipe 5 are both in the water inlet area 11, that is, the water pipe 5 is blocked, so that the water pressure first pushes the stressed portion 21 to move the valve rod 2 upward, and the blocking piece 4 rotates circumferentially during the upward movement of the valve rod 2, so that the pipe wall of the blocking piece 4 blocks the first through hole 13, that is, the hot water branch 821 and the cold water branch 811 corresponding to the most distal water consumption point 9 are disconnected, so that no hot water flows out of the faucet at this time, and abnormal starting of the water heater 8 is avoided. At the moment, cold water mainly enters from the water inlet 51 of the water pipe 5, when the water outlet 52 enters the water outlet area 12, the cold water can flow out, when the faucet is closed, because the front and back of the valve rod 2 have no pressure difference, the valve rod 2 has no upward pushing force, the valve rod 2 slowly moves downwards under the action of the elastic part 3, and the water is communicated from the guide hole 171 in the downward moving process, so that the valve rod 2 smoothly moves downwards; when the abutting portion 53 abuts against the baffle 17, the valve rod 2 is reset, the blocking member 4 is reset, and the hot water branch 821 and the cold water branch 811 are restored to the communicated state.

This prevent muddy water valve can also prevent 8 mistake startings of water heater except preventing "muddy water", because when opening the cold water mouth, probably water can walk from the machine, causes the machine to start, but the tee bend of this embodiment if water will flow, must valve rod 2 rebound after just can, nevertheless rebound will cause shutoff piece 4 rotation to close first through-hole 13, hot water route just closes.

Claims

1. A water mixing prevention valve is characterized by comprising

The water inlet pipe comprises a pipe body (1), wherein the inside of the pipe body (1) is axially divided into a water inlet area (11) and a water outlet area (12) which are mutually independent, a first through hole (13) for supplying hot water to flow into the pipe body (1) and a second through hole (14) for supplying cold water to flow into the pipe body (1) are formed in the pipe body (1), and the first through hole (13) and the second through hole (14) are both positioned in the water inlet area (11) and are axially arranged at intervals;

the valve rod (2) can be arranged in the water inlet area (11) in an axially moving mode along the pipe body (1), along the direction of cold water flow, the valve rod (2) is located at the downstream of the second through hole (14), and the valve rod (2) can move towards the direction far away from the second through hole (14) under the action of water pressure;

the elastic piece (3) acts on the valve rod (2) to keep the valve rod (2) in a trend of moving towards a direction close to the second through hole (14);

the blocking piece (4) is movably arranged in the pipe body (1), a third through hole (41) which can be correspondingly communicated with the first through hole (13) is formed in the blocking piece (4), the blocking piece (4) is linked with the valve rod (2), the first through hole (13) is shielded by the blocking piece (4) under the condition that the valve rod (2) is far away from the second through hole (14), and the first through hole (13) is correspondingly communicated with the third through hole (41) under the condition that the valve rod (2) is close to the second through hole (14);

the water pipe (5) can be arranged in the pipe body (1) in an axially moving mode along the pipe body (1), one end of the water pipe (5) is connected with the end portion, facing the water outlet area (12), of the valve rod (2), the other end of the water pipe is closed and can move to the water outlet area (12), a water inlet (51) and a water outlet (52) are formed in the peripheral wall of the water pipe (5), the water inlet (51) is located in the water inlet area (11) all the time, and the water outlet (52) is located in the water outlet area (12) in the state that the blocking piece (4) shields the first through hole (13); and under the condition that the first through hole (13) and the third through hole (41) are correspondingly communicated, the water outlet (52) is positioned in the water inlet area (11).

2. The anti-mixing valve of claim 1, wherein: the blocking piece (4) are the tubulose that the internal perisporium that periphery wall and body (1) contacted, valve rod (2) pass blocking piece (4) and link to each other between the two and have the interval, and this blocking piece (4) axial is spacing in body (1) and can be relative body (1) circumferential direction, third through-hole (41) are located on the perisporium of blocking piece (4), first through-hole (13) are located on the perisporium of body (1).

3. The anti-mixing valve of claim 2, wherein: have in shutoff piece (4) and parallel or central circle (42) of coincidence with its axis, shutoff piece (4) and central circle (42) link to each other through connecting strip (43), central circle (42) cover is established on valve rod (2) and both threaded connection.

4. The anti-mixing valve of claim 3, wherein: and a turbine (6) which is positioned at the upstream of the valve rod (2) and can rotate circumferentially relative to the pipe body (1) is arranged in the pipe body (1) along the water flow direction of the cold water.

5. The anti-mixing valve of claim 2, wherein: two bosses (15) which are respectively positioned at two sides of the first through hole (13) are formed on the inner wall of the pipe body (1) at intervals along the axial direction, and two ends of the plugging piece (4) are respectively abutted against the two bosses (15).

6. The anti-mixing valve of claim 1, wherein: and a force bearing part (21) is formed at the end part of the valve rod (2) close to the second through hole (14) along the radial direction.

7. The anti-mixing valve of claim 6, wherein: the force receiving part (21) is bowl-shaped with an opening back to the valve rod (2).

8. The anti-mixing valve of claim 1, wherein: a partition plate (16) is formed in the pipe body (1) along the radial direction, a water inlet area (11) and a water outlet area (12) are respectively arranged on two sides of the partition plate (16), and a through hole (161) through which a water supply pipe (5) penetrates is formed in the partition plate (16).

9. The anti-mixing valve of claim 8, wherein: be equipped with in body (1) and keep off water spare (7), this keep off water spare (7) are including cover sleeve (71) on water pipe (5) and water retaining part (72) along sleeve (71) radial extension, and this water retaining part (72) enclose to establish around perforation (161).

10. The anti-mixing valve of claim 8, wherein: baffle (17) that are located between baffle (16) and shutoff piece (4) are radially formed in body (1), baffle (17) are passed in water pipe (5), just radially formed has deflector (54) that are located between baffle (17) and shutoff piece (4) on the periphery wall of water pipe (5), be equipped with two piece at least guide post (55) along the circumference interval on deflector (54), body (1) axial extension is followed in each guide post (55), two at least guiding holes (171) that the activity that supplies guide post (55) one-to-one was worn to establish are seted up along the circumference interval on baffle (17).

11. A water supply system of a water heater applying the anti-mixing valve as claimed in any one of claims 1 to 10, comprising a water heater (8), a cold water pipe (81), a hot water pipe (82) and at least one water consumption point (9) connecting the cold water pipe (81) and the hot water pipe (82) at the same time, wherein one end of the hot water pipe (82) is connected with the water outlet side of the water heater (8), the other end of the hot water pipe is divided into at least one hot water branch (821) which is connected with the water consumption points (9) in a one-to-one correspondence manner, one end of the cold water pipe (81) is connected with an external water source, the other end of the cold water pipe is divided into two branches, the first branch is connected with the water inlet side of the water heater (8), the second branch is divided into at least one cold water branch (811) which is connected with the water consumption point (9) in a one-to-one correspondence, the hot water branch (821) corresponding to the farthest water consumption point (9) is communicated with the first through hole (13) of the pipe body (1) in a fluid mode, and the cold water branch (811) corresponding to the farthest water consumption point (9) is communicated with the second through hole (14) of the pipe body (1) in a fluid mode.