CN111810676B - Anti-water-mixing three-way valve and zero-cold-water hot water system - Google Patents
Anti-water-mixing three-way valve and zero-cold-water hot water system Download PDFInfo
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- CN111810676B CN111810676B CN201910289064.0A CN201910289064A CN111810676B CN 111810676 B CN111810676 B CN 111810676B CN 201910289064 A CN201910289064 A CN 201910289064A CN 111810676 B CN111810676 B CN 111810676B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/105—Three-way check or safety valves with two or more closure members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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- Chemical & Material Sciences (AREA)
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- Multiple-Way Valves (AREA)
Abstract
The invention relates to a cross-water prevention three-way valve and a zero-cold-water hot water system, wherein the three-way valve comprises a valve body, a valve cavity of the valve body is divided into a hot water pipeline, a cold water pipeline and a water outlet pipeline, and a one-way valve is arranged in the hot water pipeline; the first valve core assembly is accommodated in the water outlet pipeline and comprises a first valve seat with a valve hole, a first elastic piece for resetting the first valve seat, a first valve core accommodated in an inner cavity of the first valve seat and used for controlling the opening and closing of the valve hole, and a second elastic piece arranged in the inner cavity of the first valve seat and used for resetting the first valve core; the second valve core assembly comprises a second valve seat accommodated in the cold water pipeline, and a second water through hole communicated with the valve cavities outside two ends of the second valve seat is formed in the second valve seat; the elastic force applied to the first valve seat by the first elastic member is smaller than the elastic force applied to the first valve element by the second elastic member.
Description
Technical Field
The invention relates to the field of valves, in particular to a water-crossing-preventing three-way valve and a zero-cold-water hot-water system.
Background
When the water heater does not work, the water heater starts a water circulating pump of the water heater when detecting that the water temperature in the pipeline is lower than a set temperature, the water circulating pump drives the water flow in the pipeline to circulate, the water heater is started to work, the cold water in the pipeline is heated, the water circulating pump stops working after the water in the pipeline is heated to the set temperature, and the water heater also stops working.
For families without a water return pipeline, at present, when the gas water heater is installed, a water faucet at the farthest end of a water way in the family can be found, a hot water pipeline is communicated with a cold water pipeline below the water faucet, and in order to prevent cold water from flowing backwards into the hot water pipeline when hot water is used, a one-way valve is generally installed at the position. However, this requires that a condition be satisfied, that is: the water resistance Z1 of the hot water line to the last tap is greater than the water resistance Z2 of the cold water line to the last tap. Now, the water resistance Z1 of the last tap connected with the hot water pipeline in the family is smaller than the water resistance Z2 of the last tap connected with the cold water pipeline. In this case, when the user opens the cold water at the farthest tap, a part of the water flows from the cold water line and another part of the water flows from the hot water line. Even all of the water flow is from the hot water circuit. This will cause the water heater to start, and the user will actually be hot water when wanting to use cold water, which causes great trouble to the user.
Disclosure of Invention
The invention aims to solve the technical problem of providing a water cross-flow prevention three-way valve which can prevent a hot water pipeline and a cold water pipeline from being communicated with each other aiming at the current situation of the prior art.
Another technical problem to be solved by the present invention is to provide a zero-cold-water hot water system that prevents a false start of a zero-cold-water function when cold water is used, in view of the current state of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: prevent water three-way valve, include the valve body that comprises first body and the second body that communicates each other by the inner chamber, first body is connected the lateral wall of second body will the valve pocket of valve body divide into hot water pipeline, cold water pipeline and outlet conduit, its characterized in that:
a check valve for limiting water flow from the first pipe body to the second pipe body is arranged in the hot water pipeline;
a first valve core assembly and a second valve core assembly which are mutually in driving connection are sequentially arranged in the second pipe body; wherein the first spool assembly comprises:
the first valve seat is movably accommodated in the second pipe body and is matched with the first valve core to disconnect the communication between the hot water pipeline and the water outlet pipeline; the first valve seat is provided with a valve hole for communicating the inner cavity of the first valve seat with the cold water pipeline;
the first elastic piece is arranged in the water outlet pipeline and used for resetting the first valve seat;
the first valve core is movably accommodated in the inner cavity of the first valve seat and is used for opening or closing the valve hole;
the second elastic piece is arranged in the inner cavity of the first valve seat and used for resetting the first valve core;
the second spool assembly includes:
the second valve seat is accommodated in the cold water pipeline in a vertically movable manner and used for opening or closing the communication between the hot water pipeline and the inner cavity of the second pipe body, and a second water passing hole communicated with the valve cavities outside two ends of the second valve seat is formed in the second valve seat;
preferably, an upper baffle and a lower baffle for limiting the moving range of the first valve seat are arranged on the inner wall of the water outlet pipeline; the first valve seat comprises a bottom plate, a top plate and a first cylinder connected between the top plate and the bottom plate; a first water through hole communicated with the inner cavity of the first cylinder and the water outlet pipeline is formed in the side wall of the first cylinder; the valve hole is formed in the bottom plate, and a shaft hole is formed in the top plate;
the first elastic piece is a spring, is sleeved on the top plate and the first barrel, and two ends of the first elastic piece respectively abut against the bottom plate and the upper baffle plate.
Further, to facilitate the installation of the first elastic member, the upper baffle plate may include an annular top plate and an annular cylinder connected to an outer periphery of the annular top plate; the annular top plate is connected with the inner peripheral wall of the water outlet pipeline, the annular cylinder is suspended in the water outlet pipeline, a gap between the annular cylinder and the inner peripheral wall of the water outlet pipeline forms a containing groove for containing the first elastic piece, and the annular cylinder is used for limiting the displacement of the first valve seat.
As a further improvement of the above schemes, a plurality of pressure relief holes may be provided at intervals on the bottom plate, and each pressure relief hole is located at the periphery of the first cylinder. The structure can ensure that the first valve core assembly can be reset more smoothly.
Preferably, the first valve core comprises a valve plate which is movably accommodated in the first cylinder and is used for closing or opening the valve hole, so as to drive a mandrel which is connected with the valve plate and is matched with the shaft hole;
the second elastic piece is a spring and is sleeved on the mandrel, and two ends of the second elastic piece respectively abut against the valve plate and the top plate.
Further, each of the above-mentioned schemes satisfies the following relational expression:
k1 is the stiffness of the second elastic member;
x1 is the precompression of the second elastic member;
k2 is the stiffness of the first elastic member;
x2 is the precompression of the first elastic member;
a1 is the area of the valve hole;
a2 is the annular area of the base plate;
l is the distance between the upper baffle and the lower baffle.
As a further improvement of the above aspects, the second spool assembly includes:
the second valve seat can be accommodated in the cold water pipeline in a sliding manner, the peripheral wall of the second valve seat is connected with the inner peripheral wall of the cold water pipeline in a sliding and sealing manner, and a plurality of second water passing holes are formed in the second valve seat;
the second cylinder is in driving connection with the second valve seat, the inner cavity of the second cylinder is communicated with the inlet of the cold water pipeline through the second water through hole, and a third water through hole is formed in the side wall of the second cylinder;
the upper end edge of the second cylinder is in driving connection with the bottom plate.
Preferably, an inner cylinder is sleeved in the second valve seat, the inner cylinder is connected with the second valve seat through a plurality of connecting plates arranged at intervals, and a gap between every two adjacent connecting plates and a cavity of the inner cylinder form the second water passing hole;
the second cylinder is in driving connection with the inner cylinder.
The zero-cold-water hot water system using the anti-water-crossing three-way valve in each scheme is characterized by comprising a zero-cold-water heater, at least one water tap and the anti-water-crossing three-way valve; the water inlet pipe of the zero-cold water heater is connected with a cold water pipeline, a circulating pump is arranged on the cold water pipeline, and the hot water pipeline of the zero-cold water heater is connected with the hot water inlet of each water tap;
the cold water inlet of at least one water tap is connected with the water outlet pipeline of the water cross prevention three-way valve; the hot water inlet of the water tap and the hot water pipeline of the anti-water-crossing three-way valve are both connected with the hot water pipeline;
the rest taps are connected conventionally.
Preferably, a water tap connected with the water cross-flow prevention three-way valve is farthest away from the zero-cold-water heater; normal minimum water pressure P in the pipe0Satisfies the following relation:
compared with the prior art, the anti-series-flow three-way valve provided by the invention can effectively avoid series flow of cold water and hot water; when the zero-cold-water hot water system using the anti-water-crossing three-way valve needs cold water, the problem of the false starting of the zero-cold-water function of the water heater is effectively solved.
Drawings
FIG. 1 is a longitudinal sectional view (in a zero cold water functional state) of an assembling structure of embodiment 1 of the present invention;
FIG. 2 is a longitudinal sectional view (with the cold water function on) of an assembled structure according to embodiment 1 of the present invention;
FIG. 3 is a longitudinal sectional view of an assembled structure of embodiment 1 of the present invention (when cold water flows out);
FIG. 4 is a schematic perspective view of a valve cartridge according to embodiment 1 of the present invention;
FIG. 5 is a longitudinal cross-sectional view of FIG. 4;
fig. 6 is a schematic view of embodiment 2 of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
Example 1
As shown in fig. 1 to 5, the anti-serial three-way valve includes:
the valve body 1 comprises a first pipe body 11 and a second pipe body 12, wherein inner cavities of the first pipe body 11 and the second pipe body 12 are communicated with each other, and the first pipe body 11 and the second pipe body 12 are perpendicular to each other in the embodiment; the axis of the first pipe 11 can also obliquely intersect with the axis of the second pipe 12; the inner cavity of the first pipe body and the inner cavity of the second pipe body form a valve cavity of the valve body 1.
The first pipe body 11 is a hot water pipeline, and a one-way valve 2 which limits water flow to flow into the pipe cavity of the second pipe body is arranged in the pipe cavity of the first pipe body.
Any one of the prior art can be selected as required by the check valve 2, the check valve 2 in this embodiment includes a third valve seat 21 disposed in the lumen of the first pipe body for blocking the hot water pipeline, a hot water passage 22 communicating with the lumen of the first pipe body is disposed on the third valve seat 21, and the hot water passage 22 includes an inlet section 22a located at the upstream and a diffuser section 22b located at the downstream, which are communicated with each other. The inlet section 22a has a smaller diameter equal to the minimum diameter of the diffuser section and is connected to the minimum diameter end of the diffuser section. The diffusion section 22b is in a horn shape, and a movable third valve core 23 in a spherical structure is arranged in the diffusion section; the diameter of the third spool 23 is larger than the bore of the inlet section 22 a.
When water flows from the inlet section to the diffusion section, the third valve core 23 is pushed by water pressure to move towards the diffusion section, so that the inlet section is communicated with the diffusion section, and water flows into the diffusion section from the inlet section and then enters the second pipe body. When water flows from the diffusion section to the inlet section, the water pressure pushes the third valve core 23 to move towards the inlet section, and the inlet section is blocked, so that the water cannot flow reversely.
The second tube 12 is divided into an outlet pipe 12a located above the first tube and a cold water pipe 12b located below the first tube 11, with the position of the first tube 11 as a boundary.
A first valve core assembly 3 and a second valve core assembly 4 are arranged in the cavity of the second pipe body, wherein the first valve core assembly 3 is accommodated in the water outlet pipeline 12a, and the second valve core assembly 4 is accommodated in the cold water pipeline 12 b.
The first valve core assembly 3 comprises an upper baffle 31 and a lower baffle 32 connected to the inner peripheral wall of the water outlet pipeline, a first valve seat 33 accommodated between the upper baffle 31 and the lower baffle 32, a first elastic piece 34 and a first valve core 35 accommodated in the first valve seat 33.
The longitudinal section of the upper baffle 31 in this embodiment is in an inverted "L" shape, the annular top plate 31a is connected to the inner peripheral wall of the water outlet pipeline, the annular cylinder 31b is suspended in the water outlet pipeline, and a gap between the annular cylinder and the inner peripheral wall of the water outlet pipeline forms a receiving groove for receiving the first elastic element 34. The first elastic member 34 in this embodiment is a spring, which is sleeved on the sleeve 33c, and the upper portion thereof is accommodated in the accommodation groove,
the lower baffle 32 is a ring-shaped flat plate, is positioned below the upper baffle 31, and is connected to the inner peripheral wall of the water outlet pipeline.
The first valve seat 33 includes a bottom plate 33a, a top plate 33b, and a first cylinder 33c connected between the bottom plate 33a and the top plate 33 b. The size of the bottom plate 33a is matched with the inner diameter of the water outlet pipe, and when the bottom plate 33a abuts against the lower baffle 32, the bottom plate and the lower baffle cooperate to close the water outlet pipe.
The top plate 33b has a diameter smaller than the inner diameter of the outlet conduit, and a gap therebetween for the passage of water. The diameter of the first cylinder 33c is equal to that of the top plate 33 b.
A first water through hole 33f for communicating the inner cavity of the first cylinder with the water outlet channel is formed in the side wall of the first cylinder 33 c; the bottom plate is provided with a valve hole 33d, and the top plate is provided with a shaft hole 33 e.
The first valve core 35, movably accommodated in the first cylinder 33c, includes a valve plate 35a, a core shaft 35b, and a second elastic member 36.
The valve plate 35a is fitted to the valve hole 33d, and when the valve plate abuts on the bottom plate 33a, the valve plate 35a closes the valve hole 33 d. The spindle 35b is adapted to the shaft hole 33e and can pass through the shaft hole 33e by an external force. The second elastic member 36 is a spring, and is sleeved on the core shaft 35b, and two ends of the second elastic member respectively abut against the valve plate 35a and the top plate 33 b.
A plurality of pressure relief holes 33g are formed in the bottom plate 33a at intervals, and each pressure relief hole 33g is located on the periphery of the first cylinder 33 c.
The second valve core assembly 4 is accommodated in the cold water pipe 12b to be movable up and down, and includes a second valve seat 41 and a second cylinder 42.
The second valve seat 41 is a tubular structure, and is slidably accommodated in the cold water pipeline 12b, the outer peripheral wall of the second valve seat 41 is connected with the inner peripheral wall of the cold water pipeline in a sliding and sealing manner, an inner cylinder 43 is sleeved in the second valve seat 41, the inner cylinder 43 is connected with the second valve seat 41 through a plurality of connecting plates 44 arranged at intervals, and a gap between every two adjacent connecting plates forms a second water passing hole 45 for cold water to pass through.
The second cylinder 42 is connected with the inner cylinder 43, and the two are integrally formed in the embodiment, and the calibers are equal; the side wall of the second cylinder 42 is provided with a third water through hole 42 a.
The upper end of the second cylinder 42 abuts against the bottom plate 33a, thereby being drivingly connected to the bottom plate 33 a. The second cylinder is integrally formed with the bottom plate 33a in this embodiment.
The rigidity of the second elastic piece is k1, the precompression amount is x1, and the pressure-bearing area of the first valve core, namely the area of the valve hole is A1; the stiffness of the first spring is k2, the precompression is x2, and the annular area of the base plate is A2. The second elastic member return spring moves from the lowermost end to the uppermost end with a compression displacement of L. And the pressure of water flow in the cold water pipeline is set to be P.
The first valve core is pushed to move upwards to the uppermost end, and then the valve hole is opened. The forces acting on the valve plate in the critical state, in which the valve opening is about to open, are:
F1＝PA1＜k1x1
force acting on the base plate:
F2＝P(A1+A2)＞k2(x2+L)
finally, obtaining:
the working principle of the anti-water-crossing three-way valve is described as follows:
when the water cross-over prevention three-way valve does not work, the first elastic piece drives the bottom plate to press downwards to abut against the lower baffle plate, the valve plate of the first valve core abuts against the valve hole of the bottom plate under the action of the second elastic piece, and the water outlet pipeline is closed; the second valve core assembly moves downwards to the lowest position under the driving of the bottom plate, the second valve seat is accommodated in the cold water pipeline at the moment, the second cylinder 42 faces to the junction position of the hot water pipeline and the second pipe body, and the junction opening is opened.
When water is not fed into the hot water pipeline and the cold water pipeline, hot water enters the inner cavity of the second pipe body through the hot water pipeline, the one-way valve and the junction; because the cold water pipeline is not opened, hot water flows down in the inner cavity of the second pipe body, one way enters the inner cavity of the inner barrel body through the third water passing hole and flows out from the inlet of the cold water pipeline, and the other way flows out from the cold water pipeline through the second water passing hole.
When cold water enters the cold water pipeline, the cold water enters the third cylinder through the inner cavity of the second cylinder and flows out of the second water through holes, the pre-pressure of the second elastic piece is greater than the pre-pressure of the first elastic piece, so that the cold water pressure firstly pushes the bottom plate to move upwards, the bottom plate drives the first valve core and the second valve core assembly to move upwards together until the bottom plate touches the upper baffle, the valve seat of the second valve core closes the hot water pipeline at the moment, meanwhile, the cold water pressure acts on the valve plate, the elastic force of the second elastic piece is overcome to push the first valve core to move upwards, the second elastic piece is compressed, the core shaft moves upwards to penetrate out of the shaft hole, the valve hole is opened, and the cold water enters the first cylinder from the valve hole and flows out through a gap between the top plate and the upper baffle. Flows out of the water outlet pipeline through the first water through hole. When cold water flows out, the phenomenon of water mixing with a hot water pipeline is avoided.
When cold water is closed, the cold water pipeline does not enter the cold water any more, the first valve core assembly moves downwards under the action of the first elastic piece and the second elastic piece, and in the process of moving downwards, water flow in the water outlet pipeline enters the cold water pipeline through the pressure relief hole, so that the first valve core assembly smoothly moves downwards to the position of the lower baffle; the first valve core assembly drives the second valve core assembly to move downwards at the same time, the hot water pipeline is opened by the second valve seat, the hot water pipeline is communicated with the cold water pipeline, and the water outlet pipeline is closed.
Example 2
As shown in fig. 6, this embodiment is a zero-cold-water hot water system using the anti-cross water three-way valve of embodiment 1.
Including a zero cold water heater 94, a plurality of faucets and a three-way valve to prevent cross-flow.
The cold water pipe 92 connected to the tap water pipe 96 is connected to the inlet water pipe 95 of the zero-cold water heater and the cold water inlets of the other taps except the farthest tap 93, the outlet water pipe of the zero-cold water heater, i.e. the hot water pipe 91, is connected to the hot water inlets of all the taps, and the taps are connected in parallel.
The most remote tap 93 is the one with the longest connecting line to the water heater 94 relative to the water heater in the hot water system.
The anti-cross-water three-way valve is arranged at the farthest position of the hot water system, an inlet of a hot water pipeline, namely a first pipe body 11 of the three-way valve, is connected with a hot water pipeline 91 of the hot water system, a cold water pipeline 92 is connected with a cold water pipeline 12b, and a water outlet of a farthest water tap 93 is connected with a water outlet pipeline of the three-way valve.
The minimum water pressure in the tap water pipeline is P0Satisfies the following relation:
when tap does not have the cold water demand, when the system automated inspection need open zero cold water function, the circulating pump 97 of water heater starts, and rivers in the hot water pipeline enter into the hot water pipeline, hot water pipeline and cold water pipeline intercommunication, and rivers get into the cold water pipeline through the second water hole and the third water hole of crossing, and then get into the cold water pipeline, form normal zero cold water and preheat the circulation, and the rivers heating in the water heater will the pipeline is to setting for the temperature.
When the water faucet needs cold water, the cold water in the cold water pipeline enters the cold water pipeline, the water pressure of the cold water is divided into two paths, one path enters the hot water pipeline, and the valve core is pushed to close the hot water channel; one way overcomes the elasticity of the first elastic part to push the first valve core assembly to the limit position together, drives the second valve seat to move upwards to close the hot water pipeline, then the water pressure overcomes the elasticity of the second elastic part again to push the first valve core to move upwards, the water outlet pipeline is opened to be communicated with the cold water pipeline, and cold water enters the farthest water faucet and flows out of the water faucet.
The rest is the same as in example 1.
Claims (10)
1. Prevent three-way valve of crossing water, include valve body (1) that first body (11) and second body (12) that communicate each other by the inner chamber constitute, first body (11) are connected the lateral wall of second body (12), will the valve pocket of valve body divide into hot water pipeline, cold water pipeline and outlet conduit, its characterized in that:
a one-way valve (2) for limiting water flow from the first pipe body (11) to the second pipe body (12) is arranged in the hot water pipeline;
a first valve core assembly (3) and a second valve core assembly (4) which are mutually connected in a driving way are sequentially arranged in the second pipe body (11); wherein the first spool assembly (3) comprises:
a first valve seat (33) movably accommodated in the second tube (12) and cooperating with the first valve core (35) to block the communication between the hot water pipeline and the water outlet pipeline; a valve hole (33d) which is communicated with the inner cavity of the first valve seat and the cold water pipeline is arranged on the first valve seat (33);
a first elastic member (34) arranged in the water outlet pipeline and used for resetting the first valve seat (33);
a first valve element (35) movably accommodated in an inner cavity of the first valve seat (33) for opening or closing the valve hole (33 d);
a second elastic member (36) arranged in the inner cavity of the first valve seat (33) and used for resetting the first valve core (35);
the second spool assembly (4) comprises:
the second valve seat (41) is accommodated in the cold water pipeline (12b) in a vertically movable manner and used for opening or closing the communication between the hot water pipeline and the inner cavity of the second pipe body, and a second water through hole (45) communicated with the valve cavities outside the two ends of the second valve seat is formed in the second valve seat (41);
the elastic force applied to the first valve seat (33) by the first elastic member (34) is smaller than the elastic force applied to the first valve element (35) by the second elastic member (36).
2. The anti-cross-over three-way valve according to claim 1, characterized in that the inner wall of the water outlet pipeline is provided with an upper baffle (31) and a lower baffle (32) for limiting the moving range of the first valve seat (33); the first valve seat (33) comprises a bottom plate (33a), a top plate (33b) and a first cylinder (33c) connected between the top plate and the bottom plate; a first water through hole (33f) for communicating the inner cavity of the first cylinder body with the water outlet pipeline is formed in the side wall of the first cylinder body (33 c); the valve hole (33d) is arranged on the bottom plate (33a), and the top plate (33b) is provided with a shaft hole (33 e);
first elastic component (34) are the spring, and the cover is established roof (33b) with on first barrel (33c), the both ends of first elastic component are contradicted respectively bottom plate (33a) with on overhead gage (31).
3. The water-blow-through preventing three-way valve according to claim 2, characterized in that the upper baffle plate (31) comprises an annular top plate and an annular cylinder connected to an outer periphery of the annular top plate; the annular top plate is connected with the inner peripheral wall of the water outlet pipeline, the annular cylinder body is suspended in the water outlet pipeline, a gap between the annular cylinder body and the inner peripheral wall of the water outlet pipeline forms a containing groove for containing the first elastic piece (34), and the annular cylinder body is used for limiting the displacement of the first valve seat (33).
4. The three-way valve for preventing water breakthrough according to claim 3, wherein the bottom plate (33a) is provided with a plurality of pressure relief holes (33g) at intervals, and each pressure relief hole (33g) is located at the periphery of the first cylinder (33 c).
5. The anti-water-breakthrough three-way valve according to claim 2, characterized in that the first spool (35) includes a valve plate (35a) movably received in the first cylinder (33c) for closing or opening the valve hole (33d) to drive a spindle (35b) connected to the valve plate (35a) and fitted to the shaft hole (33 e);
the second elastic piece (36) is a spring and is sleeved on the mandrel (35b), and two ends of the second elastic piece respectively abut against the valve plate (35a) and the top plate (33 b).
6. The water-blow-through preventing three-way valve according to any one of claims 2 to 5, characterized in that:
k1 is the stiffness of the second elastic member;
x1 is the precompression of the second elastic member;
k2 is the stiffness of the first elastic member;
x2 is the precompression of the first elastic member;
a1 is the area of the valve hole;
a2 is the area of the bottom plate;
l is the distance between the upper baffle and the lower baffle.
7. Anti-blow-through three-way valve according to claim 6, characterized in that the second spool assembly (4) comprises:
the second valve seat (41) is accommodated in the cold water pipeline (12b) in a sliding manner, the peripheral wall of the second valve seat is connected with the inner peripheral wall of the cold water pipeline in a sliding and sealing manner, and a plurality of second water passing holes (45) are formed in the second valve seat (41);
the second cylinder (42) is in driving connection with the second valve seat (41), the inner cavity of the second cylinder is communicated with the inlet of the cold water pipeline through the second water passing hole (45), and a third water passing hole (42a) is formed in the side wall of the second cylinder;
the upper end edge of the second cylinder (42) is in driving connection with the bottom plate (33 a).
8. The anti-water-running three-way valve according to claim 7, characterized in that an inner cylinder (43) is sleeved in the second valve seat (41), the inner cylinder (43) is connected with the second valve seat (41) through a plurality of connecting plates (44) arranged at intervals, and the space between adjacent connecting plates and the cavity of the inner cylinder form the second water through hole (45);
the second cylinder (42) is in driving connection with the inner cylinder (43).
9. Zero cold water hot water system using the anti-cross water three-way valve according to any one of claims 1 to 8, characterized by comprising a zero cold water heater (94) and at least one tap and an anti-cross water three-way valve; a water inlet pipe of the zero-cold water heater (94) is connected with a cold water pipeline, a circulating pump is arranged on the cold water pipeline, and a hot water pipeline of the zero-cold water heater is connected with hot water inlets of all the water taps;
the cold water inlet of at least one water tap is connected with the water outlet pipeline of the water cross prevention three-way valve; the hot water inlet of the water tap and the hot water pipeline of the water cross prevention three-way valve are both connected with the hot water pipeline.
10. The zero-cold water hot water system according to claim 9, wherein a tap connecting the anti-cross water three-way valve is farthest from the zero-cold water heater; minimum water pressure P in the cold water pipeline0Satisfies the following relation:
k1 is the stiffness of the second elastic member;
x1 is the precompression of the second elastic member;
k2 is the stiffness of the first elastic member;
x2 is the precompression of the first elastic member;
a1 is the area of the valve hole;
a2 is the area of the bottom plate;
l is the distance between the upper baffle and the lower baffle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910289064.0A CN111810676B (en) | 2019-04-11 | 2019-04-11 | Anti-water-mixing three-way valve and zero-cold-water hot water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910289064.0A CN111810676B (en) | 2019-04-11 | 2019-04-11 | Anti-water-mixing three-way valve and zero-cold-water hot water system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111810676A CN111810676A (en) | 2020-10-23 |
| CN111810676B true CN111810676B (en) | 2021-07-23 |
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| CN201910289064.0A Active CN111810676B (en) | 2019-04-11 | 2019-04-11 | Anti-water-mixing three-way valve and zero-cold-water hot water system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114413032B (en) * | 2022-01-24 | 2022-11-04 | 宁波方太厨具有限公司 | Water mixing valve and zero-cold-water heater circulating system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001336646A (en) * | 2000-05-30 | 2001-12-07 | Tgk Co Ltd | Hot-cold water mixing valve |
| CN201007372Y (en) * | 2006-12-20 | 2008-01-16 | 崔源湘 | Fluid jetting type cold and hot water mixed valve |
| CN104422180A (en) * | 2013-09-05 | 2015-03-18 | 苏州开来新能源有限公司 | Up-water and down-water temperature control device applied to solar water heater and having function of preventing mixture of cold water and hot water |
| CN204437390U (en) * | 2015-01-19 | 2015-07-01 | 台州中天卫厨有限公司 | Water heater liner leakproof valve |
| CN105736747A (en) * | 2014-12-10 | 2016-07-06 | 常州金利智能机械有限公司 | Three-way constant-temperature water mixing valve |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001336646A (en) * | 2000-05-30 | 2001-12-07 | Tgk Co Ltd | Hot-cold water mixing valve |
| CN201007372Y (en) * | 2006-12-20 | 2008-01-16 | 崔源湘 | Fluid jetting type cold and hot water mixed valve |
| CN104422180A (en) * | 2013-09-05 | 2015-03-18 | 苏州开来新能源有限公司 | Up-water and down-water temperature control device applied to solar water heater and having function of preventing mixture of cold water and hot water |
| CN105736747A (en) * | 2014-12-10 | 2016-07-06 | 常州金利智能机械有限公司 | Three-way constant-temperature water mixing valve |
| CN204437390U (en) * | 2015-01-19 | 2015-07-01 | 台州中天卫厨有限公司 | Water heater liner leakproof valve |
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