CN111998101A

CN111998101A - Water mixing valve and water heater circulation system comprising same

Info

Publication number: CN111998101A
Application number: CN202010874281.9A
Authority: CN
Inventors: 吴帅; 朱海龙; 沈文权; 魏苗苗
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2020-11-27
Anticipated expiration: 2040-08-26
Also published as: CN111998101B

Abstract

The invention discloses a water mixing valve and a water heater circulating system comprising the same, wherein the water mixing valve comprises a shell, a valve core and a control assembly, and the shell is provided with a first hot water opening, a first cold water opening and a first water mixing opening; the valve core is positioned in the shell, a circulation chamber and a water mixing chamber which are mutually isolated are formed in the valve core, a first water return port, a second hot water port, a second cold water port and a second water mixing port are arranged on the outer peripheral surface of the valve core, the first water return port and the second water return port are communicated with the circulation chamber, and the second hot water port, the second cold water port and the second water mixing port are communicated with the water mixing chamber; the control assembly can control the valve core to move to the circulating position and the water mixing position. This mix water valve and contain its water heater circulation system, with circulation function and the integration of mixing the water function in mixing the water valve, need not set up the check valve alone in order to establish the circulation water route, the mounting means is simple, only needs a water valve of mixing can realize the preheating function of "zero start" of water heater.

Description

Water mixing valve and water heater circulation system comprising same

Technical Field

The invention relates to a water mixing valve and a water heater circulating system comprising the same.

Background

As shown in fig. 1, in a water heater circulation system on the market, a hot water port of a water heater 100 is communicated with a hot water pipe 200, and a cold water port of the water heater 100 is communicated with a cold water pipe 300. A water valve 400 is installed at each water using point, a hot water port of the water valve 400 is communicated with the hot water pipe 200, and a cold water port of the water valve 400 is communicated with the cold water pipe 300. In order to realize the circulation function, when the water dispenser is installed, a check valve 500 is additionally installed at the farthest water using point, both ends of the check valve 500 are respectively communicated with the hot water pipe 200 and the cold water pipe 300, and the flow direction of the check valve 500 is from the hot water pipe 200 to the cold water pipe 300.

Through setting up the check valve, solved the preheating problem of the water in the pipeline of water heater, but when the user used cold water at the farthest end with water point, partial cold water of cold water pipe can flow out behind the check valve through the water heater, and has water entering water heater can lead to the mistake of water heater to start.

Disclosure of Invention

The invention aims to overcome the defect that a water heater is easy to start by mistake when cold water is used at the farthest water using point in the prior art, and provides a water mixing valve and a water heater circulating system comprising the same.

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

the invention provides a water mixing valve which comprises a shell, a valve core and a control assembly, wherein the shell is provided with a first hot water port, a first cold water port and a first water mixing port, and the first hot water port, the first cold water port and the first water mixing port are communicated to the inner peripheral surface of the shell; the valve core is positioned in the shell, a circulation chamber and a water mixing chamber which are mutually isolated are formed in the valve core, a first water return port, a second hot water port, a second cold water port and a second water mixing port are arranged on the outer peripheral surface of the valve core, the first water return port and the second water return port are communicated with the circulation chamber, and the second hot water port, the second cold water port and the second water mixing port are communicated with the water mixing chamber; the control assembly can control the valve core to move to a circulating position and a water mixing position; when the valve core is positioned at the circulating position, the first water return port is communicated with the first hot water port, and the second water return port is communicated with the first cold water port; when the valve core is located at the water mixing position, the second hot water port is communicated with the first hot water port, the second cold water port is communicated with the first cold water port, and the second water mixing port is communicated with the first water mixing port.

In this technical scheme, through the structural design of above-mentioned muddy water valve, with circulation function and muddy water function integration in muddy water valve, need not set up the check valve alone in order to establish the circulation water route, the mounting means is simple, only needs a muddy water valve can realize the preheating function of "zero start" of water heater.

Preferably, the control assembly comprises a handle, a mounting seat and a connecting rod, the handle being mounted on the housing; the mounting seat is fixed on the peripheral surface of the valve core; one end of the connecting rod is mounted on the handle and can rotate around a first rotating shaft, the other end of the connecting rod is mounted on the mounting seat and can rotate around a second rotating shaft, and the first rotating shaft and the second rotating shaft are parallel to the axis of the valve core.

In this technical scheme, when the handle lifted, the connecting rod moved with the handle together, and the connecting rod drove the case again and rotates around the axis to make the case can switch between circulation position and muddy water position.

Preferably, the connecting rod is located in the shell, and a first abutting surface and a second abutting surface are arranged on the inner surface of the shell; when the connecting rod moves to abut against the first abutting surface, the valve core is located at the circulating position; when the connecting rod moves to abut against the second abutting surface, the valve core is located at the water mixing position.

In this technical scheme, through setting up first butt face, second butt face, make the connecting rod move and be restricted when first butt face, second butt face to make the case no longer rotate, the case is restricted at circulation position and muddy water position.

Preferably, the control assembly comprises a support rod, a handle, a gear and a rack, the support rod is mounted on the housing; the handle is arranged on the supporting rod and can drive the supporting rod to rotate around the axis of the handle; the gear is fixed at one end of the support rod, which is far away from the handle, the gear and the support rod are coaxially arranged, and the axis of the gear is vertical to the axis of the valve core; the rack is arranged on the outer peripheral surface of the valve core, a tooth groove of the rack extends along the circumferential direction of the valve core, the rack is arranged along the axial direction of the valve core, and the gear is meshed with the rack.

In this technical scheme, when the handle drove the bracing piece and rotates, the bracing piece drove the gear and rotates, and the rack turns into the axial displacement of case with the rotation of gear to make the case can move between first extreme position and second extreme position along the axial.

Preferably, the distance from the center of the first water return port to the center of the second water return port along the axial direction of the valve core is equal to the distance from the center of the first hot water port to the center of the first cold water port along the axial direction of the valve core; an included angle between a vertical line from the center of the first water return port to the axis of the valve core and an included angle between a vertical line from the center of the second water return port to the axis of the valve core are equal to an included angle between a vertical line from the center of the first hot water port to the axis of the valve core and an included angle between a vertical line from the center of the first cold water port to the axis of the valve core.

In this technical scheme, when first hot water mouth, first cold water mouth, first return water mouth, second return water mouth set up like above-mentioned position, only need rotate the case around the axis, can adjust to the circulating position, the moving means of case is simple, easy control.

Preferably, the first water return port and the second water return port are arranged in a row along a direction parallel to the axial direction of the valve core, and the first hot water port and the first cold water port are arranged in a row along a direction parallel to the axial direction of the valve core.

In the technical scheme, the first hot water port and the first cold water port are arranged in a row along the direction parallel to the axial direction of the valve core, so that the installation of the first hot water port, the first cold water port and a pipeline is facilitated, and the occupied space after the water mixing valve is installed is smaller.

Preferably, the distance from the center of the second hot water port to the center of the second cold water port along the axial direction of the valve core is equal to the distance from the center of the first hot water port to the center of the first cold water port along the axial direction of the valve core; the distance from the center of the second water mixing port to the center of the second cold water port along the axial direction of the valve core is equal to the distance from the center of the first water mixing port to the center of the first cold water port along the axial direction of the valve core; an included angle between a vertical line from the center of the second hot water port to the axis of the valve core and between the center of the second cold water port and the axis of the valve core is equal to an included angle between a vertical line from the center of the first hot water port to the axis of the valve core and between the center of the first cold water port and the axis of the valve core; an included angle between a vertical line from the center of the second water mixing port to the axis of the valve core and an included angle between a vertical line from the center of the second cold water port to the axis of the valve core are equal to an included angle between a vertical line from the center of the first water mixing port to the axis of the valve core and an included angle between a vertical line from the center of the first cold water port to the axis of the valve core.

In this technical scheme, when first hot water mouth, first cold water mouth, first muddy mouth of a river, second hot water mouth, second cold water mouth and second mix the mouth of a river and set up like above-mentioned position, only need rotate the case around the axis, can adjust to mixing the water position, the moving means of case is simple, easy control.

Preferably, the second hot water outlet and the second cold water outlet are arranged in a row along a direction parallel to the axial direction of the valve core, and the first hot water outlet and the first cold water outlet are arranged in a row along a direction parallel to the axial direction of the valve core.

Preferably, the length of the inner cavity of the shell along the axial direction is larger than that of the valve core along the axial direction, and the control assembly can control the valve core to move to a first limit position and a second limit position along the axial direction in the shell; when the valve core moves to a first limit position or a second limit position along the axial direction, the first water return opening and the first hot water opening have sections which are overlapped along the axial direction, and the second water return opening and the first cold water opening have sections which are overlapped along the axial direction.

In the technical scheme, through the arrangement of the lengths of the first water return port and the second water return port, after the control component controls the valve core to rotate to the circulation position, no matter how the valve core moves along the axial direction, the first water return port is always communicated with the first hot water port, the second water return port is always communicated with the first cold water port, and the circulation water path can always ensure smoothness.

Preferably, the length of the inner cavity of the shell along the axial direction is larger than that of the valve core along the axial direction, and the control assembly can control the valve core to move to a first limit position and a second limit position along the axial direction in the shell; when the valve core moves to a first limit position along the axial direction, the second hot water port and the first hot water port are not overlapped along the axial direction, the second cold water port and the first cold water port are provided with overlapped sections along the axial direction, and the second water mixing port and the first water mixing port are provided with overlapped sections along the axial direction; when the valve core moves to a second limit position along the axial direction, the second hot water port and the first hot water port have overlapped sections along the axial direction, the second cold water port and the first cold water port do not overlap along the axial direction, and the second water mixing port and the first water mixing port have overlapped sections along the axial direction.

In this technical scheme, through the setting of the length of second hot water mouth, second cold water mouth, after control assembly control valve core rotated to muddy water position, the axial displacement is followed to the second control valve core again, can switch to cold water state and hot water state.

Preferably, the mixing valve further comprises a one-way valve core, the one-way valve core is installed on the first hot water port, and the flow direction of the one-way valve core flows into the shell from the outside of the shell.

In this technical scheme, through setting up the check valve core, make cold water can't flow to the hot water mouth of water heater through first hot water mouth, the water route can only flow along the direction of first hot water mouth, first return water mouth, circulation cavity, second return water mouth, first cold water mouth.

Preferably, the water mixing valve further comprises a sealing gasket, the sealing gasket is located between the inner circumferential surface of the shell and the outer circumferential surface of the valve core, and the sealing gasket is provided with openings corresponding to the first hot water opening, the first cold water opening and the first water mixing opening.

In this aspect, the gasket can fill the gap between the inner peripheral surface of the housing and the outer peripheral surface of the valve element, and water leakage does not occur in the region other than the corresponding communication port.

The invention provides a water heater circulating system which comprises a water heater, a cold water pipe, a hot water pipe and a water mixing valve, wherein the water mixing valve is characterized in that a hot water opening of the water heater is communicated with a first hot water opening of the water mixing valve through the hot water pipe, and a cold water opening of the water heater is communicated with a first cold water opening of the water mixing valve through the cold water pipe.

In this technical scheme, when using this muddy water valve to water heater circulation system on, need not set up the check valve alone in order to establish the circulation water route, the mounting means is simple, only needs a muddy water valve can realize the preheating function of "zero start" of water heater.

Preferably, the circulation system further comprises at least one middle valve, a hot water port of the middle valve is communicated with the hot water pipe, a cold water port of the middle valve is communicated with the cold water pipe, and the middle valve is closer to the water heater than the water mixing valve.

In the technical scheme, when a plurality of water consumption points are arranged, the water mixing valve is only required to be used at the water consumption point at the farthest end, and the water consumption point in the middle can be just used as a middle valve by using a conventional valve.

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:

this mix water valve and contain its water heater circulation system, through the structural design to the case of mixing the water valve, set up the circulation chamber of mutual isolation and mix the water chamber in the case, with circulation function and muddy water function integration in mixing the water valve, need not set up the check valve alone in order to establish the circulation water route, the mounting means is simple, only needs one to mix the water valve can realize the function of preheating of "zero start" of water heater.

Drawings

Fig. 1 is a schematic structural diagram of a water heater circulation system in the prior art.

Fig. 2 is a schematic structural diagram of the mixing valve of the present invention.

Fig. 3 is a schematic view of the internal structure of the mixing valve shown in fig. 2.

Fig. 4 is a schematic view of the internal structure of the mixing valve shown in fig. 2.

Fig. 5 is a schematic view of the internal structure of the mixing valve shown in fig. 2.

Fig. 6 is a schematic view of the internal structure of the housing of the mixing valve shown in fig. 2.

Fig. 7 is a schematic view of the internal structure of the housing of the mixing valve shown in fig. 2.

Fig. 8 is a schematic structural view of a valve element of the mixing valve shown in fig. 2.

Fig. 9 is an internal structural view of the valve element of the mixing valve shown in fig. 2.

Fig. 10 is a structural schematic view of a one-way valve core of the mixing valve shown in fig. 2.

Fig. 11 is a schematic structural view of a control assembly of the mixing valve shown in fig. 2.

Fig. 12 is a schematic structural view of a support rod of the control assembly shown in fig. 11.

Fig. 13 is a schematic view of the handle of the control assembly of fig. 11.

Fig. 14 is a schematic view illustrating a circulation state of the mixing valve shown in fig. 2.

Fig. 15 is a schematic waterway view illustrating a circulation state of the mixing valve shown in fig. 14.

Fig. 16 is a schematic view of the mixing state of the mixing valve shown in fig. 2.

Fig. 17 is a schematic water path diagram illustrating a mixing state of the mixing valve shown in fig. 16.

Fig. 18 is a schematic water path diagram illustrating a cold water state of the mixing valve shown in fig. 2.

FIG. 19 is a schematic view of the water heater circulation system of the present invention.

Description of the reference numerals

Water heater 100

Hot water pipe 200

Cold water pipe 300

Water valve 400

One-way valve 500

Mixing valve 600

Housing 1

First hot water port 11

Inclined plane 111

The first cold water port 12

First mixing nozzle 13

First abutment surface 14

Second contact surface 15

Valve core 2

Circulation chamber 21

Water mixing chamber 22

First return water port 23

Second water return port 24

Second hot water port 25

Second cold water port 26

Second mixing nozzle 27

Control assembly 3

Handle 31

Mounting ring 311

Linkage hole 312

Rotating block 313

Operating rod 314

Mounting seat 32

Mounting groove 321

Mounting shaft 322

Connecting rod 33

Support bar 34

Linkage end 341

Mating surface 342

Gear 35

Rack 36

One-way valve core 4

Supporting frame 41

Spring 42

Piston 43

Gasket 5

First limiting plate 6

First limit groove 61

Second limit plate 7

Second limit groove 71

Trough inlet 72

Spacing ring 8

Accommodation space 9

Middle valve 700

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

Fig. 2 to 18 show an embodiment of the mixing valve according to the present invention. The water mixing valve comprises a shell 1, a valve core 2 and a control assembly 3, wherein the shell 1 is provided with a first hot water port 11, a first cold water port 12 and a first water mixing port 13, and the first hot water port 11, the first cold water port 12 and the first water mixing port 13 are communicated to the inner circumferential surface of the shell 1; the valve core 2 is positioned in the shell 1, a circulation chamber 21 and a water mixing chamber 22 which are mutually isolated are formed in the valve core 2, a first water return port 23, a second water return port 24, a second hot water port 25, a second cold water port 26 and a second water mixing port 27 are arranged on the outer peripheral surface of the valve core 2, the first water return port 23 and the second water return port 24 are communicated with the circulation chamber 21, and the second hot water port 25, the second cold water port 26 and the second water mixing port 27 are communicated with the water mixing chamber 22; the control component 3 can control the valve core 2 to move to a circulating position and a water mixing position; when the valve core 2 is positioned at the circulating position, the first water return port 23 is communicated with the first hot water port 11, and the second water return port 24 is communicated with the first cold water port 12; when the valve core 2 is located at the water mixing position, the second hot water port 25 is communicated with the first hot water port 11, the second cold water port 26 is communicated with the first cold water port 12, and the second water mixing port 27 is communicated with the first water mixing port 13.

When the water mixing valve is installed on a water heater, the first hot water port 11 is communicated with a hot water port of the water heater through a hot water pipe, and the first cold water port 12 is communicated with a cold water port of the water heater through a cold water pipe.

As shown in fig. 14 to 15, when the control component 3 controls the valve core 2 to move to the circulation position, the first water return port 23 is communicated with the first hot water port 11, and the second water return port 24 is communicated with the first cold water port 12, so that water flowing out of the hot water port of the water heater flows back into the water heater through the hot water pipe, the first hot water port 11, the first water return port 23, the circulation chamber 21, the second water return port 24, the first cold water port 12, the cold water pipe, and then flows back into the water heater from the cold water port of the water heater. Through this circulation water route, can realize preheating of the water in hot-water line, the cold water pipe, reach the effect of water heater "zero start".

As shown in fig. 14 and 15, the mixing valve further includes a one-way valve element 4, the one-way valve element 4 is mounted on the first hot water port 11, and the flow direction of the one-way valve element 4 is from the outside of the housing 1 to the inside of the housing 1. By arranging the one-way valve core 4, cold water cannot flow to the hot water port of the water heater through the first hot water port 11, and the water channel can only flow along the directions of the first hot water port 11, the first water return port 23, the circulating chamber 21, the second water return port 24 and the first cold water port 12.

One specific structure of the check valve core 4 is shown in fig. 10. The check valve core 4 comprises a support frame 41, a spring 42 and a piston 43, the support frame 41 is fixed on the inner circumferential surface of the first hot water port 11, the inner circumferential surface of the first hot water port 11 is provided with a slope 111 matched with the piston 43, the spring 42 is arranged between the support frame 41 and the piston 43, and the piston 43 faces the outside of the first hot water port 11 relative to the support frame 41. When water flows into the first hot water port 11, the water flow applies pressure to the piston 43, causing the piston 43 to compress the spring 42 inwardly, forming a gap between the piston 43 and the inclined surface 111 through which the water flows. When water flow is going to flow out from the first hot water port 11 to the outside of the housing 1, the piston 43 and the inclined surface 111 form a sealing fit to prevent the water flow from flowing out from the first hot water port 11 to the outside of the housing 1.

As shown in fig. 16 to 17, when the control assembly 3 controls the valve core 2 to move to the water mixing position, the second hot water port 25 communicates with the first hot water port 11, the second cold water port 26 communicates with the first cold water port 12, and the second water mixing port 27 communicates with the first water mixing port 13. At this time, hot water flows into the water mixing chamber 22 through the hot water pipe, the first hot water port 11 and the second hot water port 25, cold water flows into the water mixing chamber 22 through the cold water pipe, the first cold water port 12 and the second cold water port 26, the cold water and the hot water are mixed in the water mixing chamber 22 and then flow out through the second water mixing port 27 and the first water mixing port 13, and water flowing out from the first water mixing port 13 can be used by a user.

Through the structural design of above-mentioned water mixing valve, with circulation function and the integration of mixing the water function in mixing the water valve, need not set up the check valve alone in order to establish the circulation water route, the mounting means is simple, only needs one to mix the water valve can realize the preheating function of "zero start" of water heater.

As shown in fig. 4 to 9, the distance from the center of the first return water port 23 to the center of the second return water port 24 along the axial direction of the valve core 2 is equal to the distance from the center of the first hot water port 11 to the center of the first cold water port 12 along the axial direction of the valve core 2; the first water return port 23 and the second water return port 24 are arranged in a row along a direction parallel to the axial direction of the valve element 2, and the first hot water port 11 and the first cold water port 12 are arranged in a row along a direction parallel to the axial direction of the valve element 2.

When the first hot water port 11, the first cold water port 12, the first water return port 23 and the second water return port 24 are arranged at the positions, the valve core 2 can be adjusted to the circulating position only by rotating around the axis, and the moving mode of the valve core 2 is simple and easy to control.

The above embodiments are merely examples of the arrangement of the circulating water path in the case 1 and the valve body 2. In other embodiments, as long as the following conditions are met, the included angle between the center of the first water return port 23 and the vertical line between the center of the second water return port 24 and the vertical line between the center of the valve element 2 is equal to the included angle between the center of the first hot water port 11 and the vertical line between the center of the valve element 2 and the vertical line between the center of the first cold water port 12 and the vertical line between the centers of the valve elements 2, the purpose that the valve element 2 can be adjusted to the circulation position by rotating around the axis can be achieved.

In addition, the distance from the center of the second hot water port 25 to the center of the second cold water port 26 along the axial direction of the valve core 2 is equal to the distance from the center of the first hot water port 11 to the center of the first cold water port 12 along the axial direction of the valve core 2; the distance from the center of the second water mixing port 27 to the center of the second cold water port 26 along the axial direction of the valve core 2 is equal to the distance from the center of the first water mixing port 13 to the center of the first cold water port 12 along the axial direction of the valve core 2; the first hot water ports 11 and the first cold water ports 12 are arranged in a row along a direction parallel to the axial direction of the valve element 2, and the second hot water ports 25 and the second cold water ports 26 are arranged in a row along a direction parallel to the axial direction of the valve element 2.

When the first hot water port 11, the first cold water port 12, the first water mixing port 13, the second hot water port 25, the second cold water port 26 and the second water mixing port 27 are arranged at the positions, the valve core 2 can be adjusted to the water mixing position only by rotating around the axis, and the moving mode of the valve core 2 is simple and easy to control.

The above embodiments are merely examples of the arrangement of the mixed water path in the housing 1 and the valve element 2. In other embodiments, the included angle between the center of the second hot water port 25 and the vertical line of the axis of the valve core 2 and the included angle between the center of the second cold water port 26 and the vertical line of the axis of the valve core 2 are equal to the included angle between the center of the first hot water port 11 and the vertical line of the axis of the valve core 2 and the included angle between the center of the first cold water port 12 and the vertical line of the axis of the valve core 2; the included angle between the vertical line from the center of the second water mixing port 27 to the axis of the valve core 2 and the included angle between the center of the second cold water port 26 and the vertical line from the axis of the valve core 2 are equal to the included angle between the vertical line from the center of the first water mixing port 13 to the axis of the valve core 2 and the included angle between the center of the first cold water port 12 and the vertical line from the axis of the valve core 2, and the purpose that the valve core 2 can be adjusted to the water mixing position by rotating around the axis can be achieved.

The length of the inner cavity of the shell 1 along the axial direction is greater than that of the valve core 2 along the axial direction, and the control assembly 3 can control the valve core 2 to move to a first limit position and a second limit position in the shell 1 along the axial direction; when the valve core 2 moves to the first limit position or the second limit position along the axial direction, the first water return port 23 and the first hot water port 11 have a section which is overlapped along the axial direction, and the second water return port 24 and the first cold water port 12 have a section which is overlapped along the axial direction.

Through the length setting of first return water mouth 23, second return water mouth 24, after control assembly 3 control valve core 2 rotated to the circulation position, no matter how along axial displacement of valve core 2, first return water mouth 23 is linked together with first hot water mouth 11 all the time, and second return water mouth 24 is linked together with first cold water mouth 12 all the time, and the circulating water route can guarantee unblocked all the time.

When the valve core 2 moves to the first limit position along the axial direction, the second hot water port 25 and the first hot water port 11 do not overlap along the axial direction, the second cold water port 26 and the first cold water port 12 have an overlapping section along the axial direction, and the second water mixing port 27 and the first water mixing port 13 have an overlapping section along the axial direction; when the valve core 2 moves to the second limit position along the axial direction, the second hot water port 25 and the first hot water port 11 have a section which is overlapped along the axial direction, the second cold water port 26 and the first cold water port 12 do not overlap along the axial direction, and the second water mixing port 27 and the first water mixing port 13 have a section which is overlapped along the axial direction.

Through the length of the second hot water port 25 and the second cold water port 26, when the control assembly 3 controls the valve core 2 to rotate to the water mixing position, the valve core 2 is controlled to move along the axial direction, and then the cold water state and the hot water state can be switched. As shown in fig. 18, when the valve element 2 moves to the first limit position, the second hot water port 25 is not communicated with the first hot water port 11, the second cold water port 26 is communicated with the first cold water port 12, and the second water mixing port 27 is communicated with the first water mixing port 13, so that all the water flowing out of the first water mixing port 13 is cold water entering from the first cold water port 12. When the valve core 2 moves to the opposite second limit position, the second hot water port 25 is communicated with the first hot water port 11, the second cold water port 26 is not communicated with the first cold water port 12, and the second water mixing port 27 is communicated with the first water mixing port 13, so that all water flowing out of the first water mixing port 13 is hot water entering from the first hot water port 11.

As shown in fig. 5, the mixing valve further includes a gasket 5, the gasket 5 is located between the inner circumferential surface of the housing 1 and the outer circumferential surface of the valve element 2, and the gasket 5 is provided with openings corresponding to the first hot water port 11, the first cold water port 12, and the first water mixing port 13. The gasket 5 can fill the gap between the inner peripheral surface of the housing 1 and the outer peripheral surface of the valve element 2, and water leakage does not occur in the region other than the corresponding communication port.

As shown in fig. 2 to 4 and 11 to 13, the control assembly 3 includes a handle 31, a mounting seat 32 and a connecting rod 33, the handle 31 being mounted on the housing 1; the mounting seat 32 is fixed on the outer peripheral surface of the valve core 2; one end of the connecting rod 33 is mounted on the handle 31 and can rotate around a first rotating shaft, and the other end of the connecting rod 33 is mounted on the mounting seat 32 and can rotate around a second rotating shaft, wherein the first rotating shaft and the second rotating shaft are parallel to the axis of the valve core 2.

The control assembly 3 further comprises a support bar 34, a gear 35 and a rack 36, wherein the support bar 34 is mounted on the housing 1; the handle 31 is arranged on the support rod 34 and can drive the support rod 34 to rotate around the axis of the handle; the gear 35 is fixed at one end of the support rod 34 far away from the handle 31, the gear 35 and the support rod 34 are coaxially arranged, and the axis of the gear 35 is vertical to the axis of the valve core 2; the rack 36 is mounted on the outer peripheral surface of the valve element 2, the tooth grooves of the rack 36 extend in the circumferential direction of the valve element 2, the rack 36 is arranged in the axial direction of the valve element 2, and the gear 35 is meshed with the rack 36.

When the handle 31 is lifted, the connecting rod 33 moves together with the handle 31, and the connecting rod 33 rotates the valve element 2 around the axis, so that the valve element 2 can be switched between the circulating position and the water mixing position. Wherein the connecting rod 33 is located in the housing 1, and the inner surface of the housing 1 is provided with a first abutting surface 14 and a second abutting surface 15. As shown in fig. 14, when the connecting rod 33 moves to abut against the first abutting surface 14, the valve element 2 is located at the circulation position, and the mixing valve is in the circulation state; as shown in fig. 16, when the connecting rod 33 moves to contact the second contact surface 15, the valve body 2 is in the mixing position, and the mixing valve is in a mixing state.

When the handle 31 drives the support rod 34 to rotate, the support rod 34 drives the gear 35 to rotate, and the rack 36 converts the rotation of the gear 35 into axial movement of the valve element 2, so that the valve element 2 can move between the first limit position and the second limit position along the axial direction. When the valve core 2 is at the first limit position or the second limit position, the end surface of the valve core 2 can be abutted against the end surface of the inner cavity of the housing 1 to limit the further movement of the valve core 2.

As shown in fig. 11 to 13, the handle 31 includes a mounting ring 311, the mounting ring 311 extends along the circumferential direction of the support rod 34, and one end of the connecting rod 33 near the handle 31 is sleeved on the mounting ring 311 and can slide relative to the mounting ring 311. When the handle 31 rotates, the end of the connecting rod 33 can move on the mounting ring 311, and the handle 31 cannot drive the connecting rod 33 to rotate together; when the handle 31 is lifted, the connecting rod 33 is lifted along with the mounting ring 311, so that the valve core 2 can be driven to rotate.

As shown in fig. 11, the mounting seat 32 includes a mounting groove 321 and a mounting shaft 322, the mounting groove 321 is disposed along a radial plane of the valve core 2, two ends of the mounting shaft 322 are respectively mounted on two side surfaces of the mounting groove 321, an end of the connecting rod 33 extends into the mounting groove 321 and is sleeved on the mounting shaft 322, and the mounting shaft 322 is disposed parallel to an axis of the valve core 2. The connecting rod 33 can rotate about the axis of the mounting shaft 322, and the mounting groove 321 provided along the radial plane of the spool 2 can restrict the movement of the connecting rod 33 so that the connecting rod 33 can move only in the radial plane along the spool 2.

As shown in fig. 3 to 4, the mixing valve further includes a first limiting plate 6, the first limiting plate 6 is fixed on the housing 1, a first limiting groove 61 is formed in the first limiting plate 6, the first limiting groove 61 is disposed along a radial plane of the valve element 2, the connecting rod 33 passes through the first limiting groove 61, and the connecting rod 33 can move in the first limiting groove 61. The first limit groove 61 is provided in the middle of the connecting rod 33, and the first limit groove 61 may limit the movement of the connecting rod 33 so that the connecting rod 33 can move only in a plane along the radial direction of the valve body 2.

As shown in fig. 3 to 4, the mixing valve further includes a second limiting plate 7 fixed on the housing 1, a second limiting groove 71 is formed in the second limiting plate 7, the supporting rod 34 passes through the second limiting groove 71, the supporting rod 34 can rotate around an axis in the second limiting groove 71, the first limiting plate 6 is located below the second limiting plate 7, and the end surface of the gear 35 is placed on the first limiting plate 6. The first stopper plate 6 restricts axial displacement of the support rod 34, and the second stopper groove 71 restricts radial displacement of the support rod 34 such that the support rod 34 can only rotate about the axis.

Wherein, the second limit plate 7 includes a slot entrance 72, the slot entrance 72 extends from the edge of the second limit plate 7 to the second limit slot 71, and the width of the slot entrance 72 is greater than the width of the support rod 34. When the mixing valve is installed, the support rod 34 can enter the second limiting groove 71 from the groove inlet 72, and the installation of the support rod 34 is facilitated.

As shown in fig. 11 to 13, a linking hole 312 is formed at an end of the handle 31 facing the supporting rod 34, a linking end 341 is formed at an end of the supporting rod 34 facing the handle 31, the linking end 341 has two matching surfaces 342 disposed oppositely, the matching surfaces 342 are disposed parallel to the rotation axis of the supporting rod 34, and the matching surfaces 342 are attached to the inner surface of the linking hole 312. By providing the matching surface 342, the rotation of the handle 31 can drive the rotation of the supporting rod 34, and the lifting of the handle 31 can keep the supporting rod 34 stationary, so that the rotation and lifting of the handle 31 do not interfere with each other.

As shown in fig. 11 to 13, the handle 31 further includes a rotating block 313 and an operating rod 314, the rotating block 313 is connected to the support rod 34, and the extending direction of the operating rod 314 is perpendicular to the axis of the valve body 2. When a user uses the water mixing valve, the operating rod 314 drives the rotating block 313 to rotate, so as to drive the supporting rod 34 to rotate, so that the valve element 2 moves along the axial direction, and the operating rod 314 drives the rotating block 313 to lift up, so that the connecting rod 33 drives the valve element 2 to rotate around the axis.

As shown in fig. 3, the mixing valve further includes a limiting ring 8, the limiting ring 8 is fixed to the housing 1, the limiting ring 8 and the outer surface of the housing 1 form an accommodating space 9, the end of the supporting rod 34 penetrates through the housing 1 and extends into the accommodating space 9, and the rotating block 313 is placed in the accommodating space 9 and is sleeved on the end of the supporting rod 34. The accommodating space 9, while accommodating the rotating block 313, also functions to limit the action range of the rotating block 313, so that the rotating block 313 can rotate in the accommodating space 9, and the lifting angle of the rotating block 313 is limited by the accommodating space 9.

As shown in fig. 19, the mixing valve is used in a water heater circulation system, which includes a water heater 100, a cold water pipe 300, a hot water pipe 200 and a mixing valve 600, wherein a hot water inlet of the water heater 100 is communicated with a first hot water inlet 11 of the mixing valve 600 through the hot water pipe 200, and a cold water inlet of the water heater 100 is communicated with a first cold water inlet 12 of the mixing valve 600 through the cold water pipe 300.

The circulating system further comprises at least one middle valve 700, the hot water port of the middle valve 700 is communicated with the hot water pipe 200, the cold water port of the middle valve 700 is communicated with the cold water pipe 300, and the middle valve 700 is closer to the water heater 100 than the water mixing valve 600. When a plurality of water consumption points are provided, the mixing valve 600 is used only at the farthest water consumption point, and a conventional valve can be used as the middle valve 700 at the middle water consumption point.

When the water mixing valve 600 is applied to a circulating system of a water heater, a check valve does not need to be arranged independently for establishing a circulating water path, the installation mode is simple, and the zero-starting preheating function of the water heater can be realized only by one water mixing valve.

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 mixing valve, comprising:

the water mixing device comprises a shell, a water inlet, a water outlet, a water inlet pipe, a water outlet pipe and a water outlet pipe, wherein the shell is provided with a first hot water port, a first cold water port and a first water mixing port which are communicated to the inner circumferential surface of the shell;

the valve core is positioned in the shell, a circulation chamber and a water mixing chamber which are mutually isolated are formed in the valve core, a first water return port, a second hot water port, a second cold water port and a second water mixing port are arranged on the outer peripheral surface of the valve core, the first water return port and the second water return port are communicated with the circulation chamber, and the second hot water port, the second cold water port and the second water mixing port are communicated with the water mixing chamber;

the control assembly can control the valve core to move to a circulating position and a water mixing position; when the valve core is positioned at the circulating position, the first water return port is communicated with the first hot water port, and the second water return port is communicated with the first cold water port; when the valve core is located at the water mixing position, the second hot water port is communicated with the first hot water port, the second cold water port is communicated with the first cold water port, and the second water mixing port is communicated with the first water mixing port.

2. The mixing valve of claim 1, wherein the control assembly comprises:

a handle mounted on the housing;

the mounting seat is fixed on the peripheral surface of the valve core;

one end of the connecting rod is mounted on the handle and can rotate around a first rotating shaft, the other end of the connecting rod is mounted on the mounting seat and can rotate around a second rotating shaft, and the first rotating shaft and the second rotating shaft are parallel to the axis of the valve core.

3. The mixing valve of claim 2, wherein: the connecting rod is positioned in the shell, and a first abutting surface and a second abutting surface are arranged on the inner surface of the shell; when the connecting rod moves to abut against the first abutting surface, the valve core is located at the circulating position; when the connecting rod moves to abut against the second abutting surface, the valve core is located at the water mixing position.

4. The mixing valve as claimed in any one of claims 1 to 3, wherein the control assembly comprises:

a support rod mounted on the housing;

the handle is arranged on the supporting rod and can drive the supporting rod to rotate around the axis of the handle;

the gear is fixed at one end of the supporting rod, which is far away from the handle, the gear and the supporting rod are coaxially arranged, and the axis of the gear is vertical to the axis of the valve core;

the rack is arranged on the outer peripheral surface of the valve core, a tooth groove of the rack extends along the circumferential direction of the valve core, the rack is arranged along the axial direction of the valve core, and the gear is meshed with the rack.

5. The mixing valve of claim 1, wherein: the distance from the center of the first water return port to the center of the second water return port along the axial direction of the valve core is equal to the distance from the center of the first hot water port to the center of the first cold water port along the axial direction of the valve core; an included angle between a vertical line from the center of the first water return port to the axis of the valve core and an included angle between a vertical line from the center of the second water return port to the axis of the valve core are equal to an included angle between a vertical line from the center of the first hot water port to the axis of the valve core and an included angle between a vertical line from the center of the first cold water port to the axis of the valve core.

6. The mixing valve of claim 5, wherein: the first water return port and the second water return port are arranged in a row along a direction parallel to the axial direction of the valve core, and the first hot water port and the first cold water port are arranged in a row along a direction parallel to the axial direction of the valve core.

7. The mixing valve according to claim 1 or 5, characterized in that: the distance from the center of the second hot water port to the center of the second cold water port along the axial direction of the valve core is equal to the distance from the center of the first hot water port to the center of the first cold water port along the axial direction of the valve core; the distance from the center of the second water mixing port to the center of the second cold water port along the axial direction of the valve core is equal to the distance from the center of the first water mixing port to the center of the first cold water port along the axial direction of the valve core;

an included angle between a vertical line from the center of the second hot water port to the axis of the valve core and between the center of the second cold water port and the axis of the valve core is equal to an included angle between a vertical line from the center of the first hot water port to the axis of the valve core and between the center of the first cold water port and the axis of the valve core;

an included angle between a vertical line from the center of the second water mixing port to the axis of the valve core and an included angle between a vertical line from the center of the second cold water port to the axis of the valve core are equal to an included angle between a vertical line from the center of the first water mixing port to the axis of the valve core and an included angle between a vertical line from the center of the first cold water port to the axis of the valve core.

8. The mixing valve of claim 7, wherein: the second hot water openings and the second cold water openings are arranged in a row along the direction parallel to the axial direction of the valve core, and the first hot water openings and the first cold water openings are arranged in a row along the direction parallel to the axial direction of the valve core.

9. The mixing valve of claim 1, wherein: the length of the inner cavity of the shell along the axial direction is greater than that of the valve core along the axial direction, and the control assembly can control the valve core to move to a first limit position and a second limit position in the shell along the axial direction; when the valve core moves to a first limit position or a second limit position along the axial direction, the first water return opening and the first hot water opening have sections which are overlapped along the axial direction, and the second water return opening and the first cold water opening have sections which are overlapped along the axial direction.

10. The mixing valve of claim 1, wherein: the length of the inner cavity of the shell along the axial direction is greater than that of the valve core along the axial direction, and the control assembly can control the valve core to move to a first limit position and a second limit position in the shell along the axial direction; when the valve core moves to a first limit position along the axial direction, the second hot water port and the first hot water port are not overlapped along the axial direction, the second cold water port and the first cold water port are provided with overlapped sections along the axial direction, and the second water mixing port and the first water mixing port are provided with overlapped sections along the axial direction; when the valve core moves to a second limit position along the axial direction, the second hot water port and the first hot water port have overlapped sections along the axial direction, the second cold water port and the first cold water port do not overlap along the axial direction, and the second water mixing port and the first water mixing port have overlapped sections along the axial direction.

11. The mixing valve of claim 1, further comprising a one-way valve element mounted to the first hot water port, wherein the one-way valve element flows from outside the housing into the housing.

12. The mixing valve of claim 1, further comprising a gasket positioned between the inner peripheral surface of the housing and the outer peripheral surface of the valve element, wherein the gasket is provided with openings corresponding to the first hot water port, the first cold water port, and the first mixing port.

13. A water heater circulation system, characterized by comprising a water heater, a cold water pipe, a hot water pipe and a mixing valve, wherein the mixing valve is as claimed in any one of claims 1 to 12, the hot water port of the water heater is communicated with the first hot water port of the mixing valve through the hot water pipe, and the cold water port of the water heater is communicated with the first cold water port of the mixing valve through the cold water pipe.

14. The water heater circulation system of claim 13, further comprising at least one intermediate valve having a hot water port in communication with the hot water pipe and a cold water port in communication with the cold water pipe, the intermediate valve being closer to the water heater than the mixing valve.