CN113687672A

CN113687672A - Water supply method and water using system

Info

Publication number: CN113687672A
Application number: CN202110989225.4A
Authority: CN
Inventors: 高峰; 刘在祥; 陈艳凤; 顾希; 蔡园丰; 严洪; 高天奇
Original assignee: Shanghai Xingye Material Technology Co Ltd
Current assignee: Shanghai Xingye Material Technology Co Ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2021-11-23

Abstract

The application relates to a water supply method and a water using system, wherein the water supply method is applied to the water using system, and the water using system comprises the following steps: the water heater comprises a cold water flow channel, a hot water flow channel, a mixed water flow channel and a first electric heater, wherein the mixed water flow channel is respectively communicated with the cold water flow channel and the hot water flow channel; the water supply method includes: acquiring a target water temperature of the water mixing flow channel and a current first water temperature of the hot water flow channel; if the first water temperature is smaller than the target water temperature, the cold water flow channel and the mixed water flow channel are controlled to be separated, the hot water flow channel supplies water to the mixed water flow channel, the first electric heater is controlled to heat the mixed water flow channel with first power, the mixed water flow channel is controlled to supply water with first flow, the first flow is determined according to the first power and a first temperature difference, and the first temperature difference is the temperature difference between the target water temperature and the first water temperature. The automatic accurate adjustment that this application helped realizing water supply temperature promotes user experience.

Description

Water supply method and water using system

Technical Field

The application relates to a water supply method and a water using system.

Background

The traditional water system with cold water and hot water two-way water supply, such as a faucet system, a shower system and the like, has the defects in the aspects of structural design and water supply method, such as difficulty in realizing automatic accurate adjustment of water supply temperature and poor user experience.

Disclosure of Invention

The technical problem that this application was solved is: a water supply method and a water using system are provided, so that automatic and accurate adjustment of water supply temperature is facilitated, and user experience is improved.

The technical scheme of the application is as follows:

in a first aspect, a water supply method is provided, which is applied to a water using system, the water using system includes:

a cold water flow passage is arranged on the water tank,

a hot water flow passage is arranged on the upper portion of the water tank,

a mixed water flow passage respectively communicated with the cold water flow passage and the hot water flow passage, an

The first electric heater is connected to the water mixing flow passage;

the water supply method includes:

acquiring a target water temperature of the water mixing flow channel and a current first water temperature of the hot water flow channel;

if the first water temperature is smaller than the target water temperature, the cold water flow channel and the mixed water flow channel are controlled to be separated, the hot water flow channel supplies water to the mixed water flow channel, the first electric heater is controlled to heat the mixed water flow channel with first power, the mixed water flow channel is controlled to supply water with first flow, the first flow is determined according to the first power and a first temperature difference, and the first temperature difference is the temperature difference between the target water temperature and the first water temperature.

In an optional design, the water supply method further comprises:

acquiring a current second water temperature of the cold water flow channel;

if the first water temperature is larger than the target water temperature and the second water temperature is smaller than the target water temperature, determining a ratio of a second temperature difference to a third temperature difference as a flow ratio of the cold water flow channel to the hot water flow channel, and controlling the cold water flow channel and the hot water flow channel to supply water to the mixed water temperature of the mixed water flow channel according to the flow ratio, wherein the second temperature difference is a temperature difference between the first water temperature and the target water temperature, and the third temperature difference is a temperature difference between the target water temperature and the second water temperature;

and if the first water temperature is equal to the target water temperature, controlling the cold water flow channel to be separated from the water mixing flow channel, and controlling the hot water flow channel to supply water to the water mixing flow channel.

In an alternative design, the first flow rate is determined based on the first power and a first temperature difference, and includes:

the first flow rate is a flow rate at which the temperature of the hot water flowing through the hot water supplying pipe.

The water supply method further includes: acquiring the target flow of the water mixing flow channel;

the first flow rate is determined from the first power and a first temperature differential, including:

the first flow rate is determined according to the first power, the first temperature difference and the target flow rate, wherein the first flow rate is less than or equal to the target flow rate.

In an alternative design, the first electric heater is adjustable in power, and the first power is determined based on the first temperature difference and the target flow rate.

In an alternative design, the first power is determined based on the first temperature difference and the target flow rate, and includes:

if the product of the first temperature difference and the target flow is larger than a first preset product threshold value, determining the first power as a first preset power value;

if the product of the first temperature difference and the target flow is smaller than a second preset product threshold value, determining the first power as a second preset power value, wherein the second preset product threshold value is smaller than the first preset product threshold value;

and if the second preset product threshold is not more than the product of the first temperature difference and the target flow and is not more than the first preset product threshold, determining the first power as a third preset power value, wherein the first preset power value is larger than the third preset power value and is larger than the second preset power value.

In an alternative design, the first preset power value is a maximum power of the first electric heater.

In an optional design, the water system further comprises a water return flow passage communicated with the hot water flow passage;

the water supply method further includes:

acquiring the target flow of the water mixing flow channel;

if the first water temperature is less than the target water temperature, the cold water flow channel is controlled to be separated from the mixed water flow channel, so that the hot water flow channel supplies water to the mixed water flow channel, the first electric heater is controlled to heat the mixed water flow channel with first power, and the mixed water flow channel is controlled to supply water with first flow, and the method comprises the following steps:

and if the first water temperature is less than the target water temperature and the product of the first temperature difference and the target flow is less than a third preset product threshold, controlling the cold water flow passage to be separated from the mixed water flow passage, enabling the hot water flow passage to supply water to the mixed water flow passage, controlling the first electric heater to heat the mixed water flow passage with first power, and controlling the mixed water flow passage to supply water with first flow.

In an optional design, the water supply method further comprises:

and if the first water temperature is less than the target water temperature and the product of the first temperature difference and the target flow is greater than the third preset product threshold, controlling the cold water flow channel and the hot water flow channel to be separated from the water mixing flow channel and controlling the hot water flow channel to supply water to the water return flow channel.

In an optional design, the water system further comprises a hot water tank in communication with the hot water flow passage for supplying water to the hot water flow passage;

the water supply method further includes:

acquiring the current fourth water temperature of the hot water tank;

if the first water temperature is less than the target water temperature and the product of the first temperature difference and the target flow is greater than the third preset product threshold, the cold water flow channel and the hot water flow channel are controlled to be both separated from the water mixing flow channel, and the hot water flow channel is controlled to send water to the water return flow channel, including:

and if the first water temperature is less than the target water temperature, the product of the first temperature difference and the target flow is greater than a third preset product threshold, and the first water temperature is less than the fourth water temperature, controlling the cold water flow channel and the hot water flow channel to be separated from the water mixing flow channel, and controlling the hot water flow channel to send water to the water return flow channel.

In an optional design, if the first water temperature is less than the target water temperature, the controlling the cold water flow channel to be blocked from the mixed water flow channel so that the hot water flow channel supplies water to the mixed water flow channel, the controlling the first electric heater to heat the mixed water flow channel at a first power, and the controlling the mixed water flow channel to supply water at a first flow rate further includes:

and if the first water temperature is less than the target water temperature and the first water temperature is more than or equal to the fourth water temperature, the cold water flow channel is controlled to be separated from the mixed water flow channel, the hot water flow channel supplies water to the mixed water flow channel, the first electric heater is controlled to heat the mixed water flow channel with first power, and the mixed water flow channel is controlled to supply water with first flow.

In an optional design, the water supply method further comprises:

acquiring the target flow of the water mixing flow channel;

if the first water temperature is less than the target water temperature, and

controlling the cold water flow channel to be separated from the water mixing flow channel, enabling the hot water flow channel to supply water to the water mixing flow channel, determining the maximum power of the first electric heater as the first power, controlling the first electric heater to heat the water mixing flow channel at the first power, and controlling the water mixing flow channel to supply water at a first flow rate, wherein K is a compensation coefficient, P is a sum of the first flow rate and the second flow rate, and K is a compensation coefficient_maxIs the maximum power of the first electric heater, T₀Is the target water temperature, S₀For the target flow, T₁The first water temperature is set.

if the first water temperature is less than the target water temperature, and

and is

The cold water flow passage and the mixed water flow passage are controlled to be separated, the hot water flow passage supplies water to the mixed water flow passage, and the K.S is used₀·(T₀-T₁) Determining the first power, controlling the first electric heater to heat the water mixing flow passage with the first power, and controlling the water mixing flow passage to supply water with a first flow rate, wherein P is_minIs the minimum power of the first electric heater.

In an optional design, the water supply method further comprises:

acquiring a current second water temperature of the cold water flow channel;

if the first water temperature is less than the target water temperature, and

determining a second power of the first electric heater, determining a fourth flow of the hot water flow passage and a third flow of the cold water flow passage according to the second power, the target water temperature, the target flow, the first water temperature and the second water temperature, controlling the first electric heater to heat the hot water flow passage with the second power, controlling the hot water flow passage to supply water to the mixed water flow passage at the second flow, and controlling the cold water flow passage to supply water to the mixed water flow passage at the third flow;

wherein the determining a second power of the first electric heater comprises:

determining the second power as P_max≥P₂≥K·S₀·(T₀-T₁)；

Wherein the determining a second flow rate of the hot water flow path and a third flow rate of the cold water flow path according to the first power, the target water temperature, the target flow rate, the first water temperature, and the second water temperature includes:

by means of a relational expression

Calculating the second flow and the third flow:

k is a compensation factor, P₂Is the second power, T₀Is the target water temperature, S₀For the target flow, T₁Is the first water temperature, T₂Is the second water temperature, S₂For the second flow, S₃Is the third flow rate.

In an alternative design, the determining the second power of the first electric heater includes:

s100, making i equal to 1;

s200, judging

Whether or not S is greater than or equal to₀Wherein i is 1, 2, 3 … n, P_i ⁰For a predetermined i-th predetermined power, P, of the first electric heater₁ ⁰＝P_min，P_n ⁰＝P_maxAnd the ith preset power is less than the ith +1 preset power;

s300, if yes, judging

Greater than or equal to S₀Then P will be_i ⁰Determining as the second power;

if it is determined that

Less than S₀Then, the following step S400 is executed;

s400, let i equal to i +1, and repeat the above steps S200 and S300.

In a second aspect, a water usage system is provided, comprising:

a cold water flow passage is arranged on the water tank,

a hot water flow passage, and

the water mixing flow passage is respectively communicated with the cold water flow passage and the hot water flow passage;

characterized in that, the water system still includes:

the water mixing valve is connected between the cold water flow channel and the water mixing flow channel and between the hot water flow channel and the water mixing flow channel and used for adjusting the flow ratio of the cold water flow channel and the hot water flow channel to the water mixing flow channel;

the first electric heater is connected to the water mixing flow channel and used for heating the water mixing flow channel;

the first water temperature sensor is connected to the hot water flow passage and used for acquiring a first water temperature of the hot water flow passage;

an operable water temperature setting element for setting a target water temperature of the mixed water flow passage; and

a controller in communication with the first water temperature sensor, the first electric heater, and the water temperature setting element, respectively.

In an alternative design, the water usage system further comprises:

the first flow regulating valve is connected to the water mixing flow channel and used for regulating the first flow of the water mixing flow channel; and

a flow setting element operable to set a target flow rate of the mixing flow passage;

wherein the first flow regulating valve and the flow setting element are both in communication with the controller.

In an alternative design, the water usage system further comprises:

the backwater flow passage is connected and communicated with the hot water flow passage; and

the water return valve is connected between the hot water flow passage and the water return flow passage and is used for disconnecting or communicating the hot water flow passage and the water return flow passage;

wherein, the return water valve with controller communication connection.

In an alternative design, the water usage system further comprises:

a hot water supply unit communicated with the hot water flow passage for supplying water to the hot water flow passage; and

a fourth water temperature sensor connected to the hot water supply unit for acquiring a fourth water temperature of the hot water supply unit;

wherein the fourth water temperature sensor is in communication with the controller.

In an optional design, the water system further includes a housing, the cold water flow channel, the hot water flow channel, the mixed water valve, the first electric heater, and the controller are all accommodated and fixed in the housing, the cold water flow channel and the hot water flow channel are both provided with water inlet joints extending out of the housing, and the mixed water flow channel is provided with water outlet joints extending out of the housing

The application has at least the following beneficial effects:

this application is when the current temperature of hot water runner is less than muddy water runner target temperature, breaks off cold water runner and muddy water runner's intercommunication, only lets hot water runner supply water with appropriate flow to muddy water runner to muddy water runner heating in the water supply, thereby make muddy water runner supply water to the water terminal with target temperature, promoted user experience.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description only relate to some embodiments of the present application and are not limiting on the present application.

Fig. 1 is a schematic view of a waterway system in an embodiment of the present application.

Fig. 2 is a schematic cross-sectional view of the first electric heater of fig. 1.

Fig. 3 is a schematic view of a waterway system in the second embodiment of the present application.

Fig. 4 is a schematic view of a waterway system in the third embodiment of the present application.

Fig. 5 is a partially exploded view of the mixing valve of fig. 4.

Fig. 6 is a schematic view of fig. 5 with the addition of a first pivot axis and a first cylindrical surface.

Fig. 7 is a partially exploded view of the mixing valve of fig. 4.

Fig. 8 is a schematic diagram of the fixed valve plate and the first movable valve plate of the mixing valve in fig. 4.

Fig. 9 is a schematic cross-sectional view of the first movable valve plate in fig. 5.

Fig. 10 is a schematic cross-sectional view of the closed end of the valve housing of fig. 5.

Fig. 11 is a partially exploded view of the mixing valve of fig. 4.

Fig. 12 is a partially exploded view of the mixing valve of fig. 4.

Fig. 13 is a partial schematic view of the mixing valve of fig. 4.

FIG. 14 is a schematic view of a waterway system in the fourth embodiment of the present application.

FIG. 15 is a schematic view of a waterway system in the fifth embodiment of the present application.

FIG. 16 is a schematic view of a waterway system in the sixth embodiment of the present application.

Fig. 17 is a partial schematic view of fig. 16.

Fig. 18 is a schematic view of fig. 17 with the first plate removed.

Fig. 19 is a schematic view of the components of fig. 16.

Fig. 20 is an exploded schematic view of fig. 19.

Fig. 21 is a schematic view of the second flow regulating valve of fig. 17.

FIG. 22 is an exploded view of the second flow regulator valve of FIG. 21 with the second stationary plate and the third movable plate in a first engaged position.

FIG. 23 is a schematic plan view of the second fixed valve plate and the third movable valve plate of the second flow regulator valve of FIG. 21 in a first engaged state.

FIG. 24 is an exploded view of the second flow regulator valve of FIG. 21 with the second stationary plate and the third movable plate in a second engaged position.

FIG. 25 is a schematic plan view of the second flow regulator valve of FIG. 21 with the second fixed valve plate and the third movable valve plate in a second engaged position.

Fig. 26 is a schematic view of a waterway system in the seventh embodiment of the present application.

Fig. 27 is a partially exploded schematic view of fig. 26.

Fig. 28 is a partial schematic view of fig. 26.

Fig. 29 is an exploded view of fig. 28.

Fig. 30 is a partial schematic view of fig. 29.

FIG. 31 is the schematic view of FIG. 28 with the third, fourth and fifth fixed valve plates assembled.

FIG. 32 is the schematic view of FIG. 31 assembled with the fourth movable valve plate, the fifth movable valve plate, and the sixth movable valve plate.

Fig. 33 is a schematic view of fig. 32 with the motor, worm gear, worm and battery backup assembled.

Fig. 34 is a schematic view of fig. 33 with the rear cover and joint assembled.

Fig. 35 is an exploded schematic view of a third fixed valve plate and a fourth movable valve plate of the water mixing valve in the seventh embodiment of the present application.

Fig. 36 is a schematic view of fig. 35 with the addition of a third pivot axis and a second cylindrical surface.

FIG. 37 is a schematic structural diagram of the fourth movable valve plate.

Fig. 38 is a schematic view of a mixing valve according to an embodiment of the present application, showing a third fixed valve plate and a fourth movable valve plate in another view.

Fig. 39 is a schematic plan view of a third fixed valve plate and a fourth movable valve plate of a mixing valve in a first matching state according to a seventh embodiment of the present application.

Fig. 40 is a schematic plan view of a third fixed valve plate and a fourth movable valve plate of a mixing valve in a second matching state according to a seventh embodiment of the present application.

Fig. 41 is a schematic plan view of a third fixed valve plate and a fourth movable valve plate of a mixing valve in a third matching state according to a seventh embodiment of the present application.

Fig. 42 is a schematic plan view of a third fixed valve plate and a fourth movable valve plate of a mixing valve in a fourth matching state according to a seventh embodiment of the present application.

Fig. 43 is a schematic plan view of a seventh mixing valve according to an embodiment of the present application, where the third fixed valve plate and the fourth movable valve plate are in a fifth matching state.

Fig. 44 is a schematic plan view of a seventh mixing valve of the present application with a third fixed valve plate and a fourth movable valve plate in a sixth matching state.

FIG. 45 is an exploded view of the fourth fixed valve plate and the fifth movable valve plate of the water return valve in the seventh embodiment of the present application.

FIG. 46 is an exploded view of the fourth fixed valve plate and the fifth movable valve plate of the water return valve according to the seventh embodiment of the present application from another perspective.

FIG. 47 is a schematic view of a seventh embodiment of the present application showing the fourth fixed valve plate and the fifth movable valve plate in a water passing engagement state.

FIG. 48 is a schematic view illustrating the fourth fixed valve plate and the fifth movable valve plate of the water return valve in a water-cut-off engagement state according to the seventh embodiment of the present application.

Fig. 49 is an exploded schematic view of the fourth fixed valve plate and the fifth movable valve plate of the first flow rate regulating valve according to the seventh embodiment of the present application.

Fig. 50 is an exploded view of the fourth fixed valve plate and the fifth movable valve plate of the first flow rate adjustment valve according to the seventh embodiment of the present application from another perspective.

Fig. 51 is a schematic view of a waterway system in the eighth embodiment of the present application.

Fig. 52 is a partially exploded schematic view of fig. 51.

Fig. 53 is a partial schematic view of fig. 51.

FIG. 54 is a schematic view of FIG. 53 with the rear cover installed.

FIG. 55 is a schematic view of a waterway system in an embodiment of the present application.

Fig. 56 is a flowchart of a water supply method according to a tenth embodiment of the present application.

Description of reference numerals:

c 1-first pivot axis, c 2-second pivot axis, c 3-third pivot axis, c 4-fourth pivot axis, c 4-fifth pivot axis, p 1-first cylindrical surface, p 2-second cylindrical surface;

1-a cold water flow channel, 2-a hot water flow channel, 3-a mixed water flow channel, 4-a backwater flow channel, 5-a first electric heater, 6-a mixed water valve, 7-a first flow regulating valve, 8-a water temperature setting element, 9-a flow setting element, 10-a controller, 11-a first water temperature sensor, 12-a second water temperature sensor, 13-a third water temperature sensor, 14-a second flow regulating valve, 15-a third flow regulating valve, 16-a motor, 17-a gear, 18-a backwater valve, 19-a first plate, 20-a second plate, 21-a first component, 22-a water using terminal, 23-a worm gear, 24-a worm, 25-a backup battery, 26-a shell, 27-a water tank, and 28-a second component;

103-cold water joint, 204-hot water joint, 403-return water joint;

3 a-a first mixed water flow passage section, 3 b-a second mixed water flow passage section;

101-a first runner port, 102-a second runner port, 201-a third runner port, 202-a fourth runner port, 203-a fifth runner port, 401-a sixth runner port, 402-a seventh runner port, 301-an eighth runner port, 302-a ninth runner port, 303-a tenth runner port, 304-an eleventh runner port;

601-a first fixed valve plate, 602-a first movable valve plate, 603-a second movable valve plate, 604-a rotating shaft, 605-a rotating sleeve, 606-a valve casing 606, 607-a valve cover, 608-a sealing ring, 609-a third fixed valve plate and 610-a fourth movable valve plate;

601 a-a first surface, 602 a-a second surface, 602 b-a third surface, 603 a-a fourth surface;

6011-first cold water hole, 6012-first hot water hole, 6013-first water mixing hole, 6021-second water mixing hole, 6022-third water mixing hole, 6031-first water mixing tank;

6011 a-first port, 6012 a-second port, 6021 a-third port, 6021 b-fourth port, 6022 a-fifth port, 6031 a-first slot, 6013 a-sixth port, 6022 b-seventh port;

6011a 1-first end of the first orifice, 6011a 2-third end of the first orifice, 6012a 1-second end of the second orifice, 6012a 2-fourth end of the second orifice;

6061-second cold water hole, 6062-second hot water hole, 6063-fourth water mixing hole, 6091-third cold water hole, 6092-third hot water hole, 6093-fifth water mixing hole;

610 a-eighth surface, 6101-second water mixing trough;

701-a fifth fixed valve plate, 702-a sixth movable valve plate;

702 a-a tenth surface;

7011-sixth water mixing hole, 7012-seventh water mixing hole, 7021-third water mixing groove;

1801-a fourth fixed valve plate, 1802-a fifth movable valve plate;

1802 a-a ninth surface;

18011-first water return hole, 18012-second water return hole, 18021-first water return groove, 18022-second water return groove;

1401-a second fixed valve plate, 1402-a third movable valve plate;

14011-water passing hole and 14021-water passing notch;

1901-first channel, 2001-second channel;

2101-third plate, 2102-fourth plate;

2101 a-fifth surface, 2101 b-sixth surface, 2102 a-seventh surface;

2801-fifth panel, 2802-sixth panel.

702 a-a tenth surface of the substrate,

Detailed Description

In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without any inventive step, are within the scope of protection of the application. It will be understood that some of the technical means of the various embodiments described herein may be replaced or combined with each other without conflict.

In the description of the present application and claims, the terms "first," "second," and the like, if any, are used solely to distinguish one from another as between described objects and not necessarily in any sequential or technical sense. Thus, an object defined as "first," "second," etc. may explicitly or implicitly include one or more of the object. Also, the use of the terms "a" or "an" and the like, do not denote a limitation of quantity, but rather denote the presence of at least one of the two, and "a plurality" denotes no less than two. As used herein, the term "plurality" means not less than two.

In the description of the present application and in the claims, the terms "connected," "mounted," "secured," and the like are used broadly, unless otherwise indicated. For example, "connected" may be a separate connection or may be integrally connected; can be directly connected or indirectly connected through an intermediate medium; may be non-detachably connected or may be detachably connected. The specific meaning of the foregoing terms in the present application can be understood by those skilled in the art as appropriate.

In the description of the present application and in the claims, if there is an orientation or positional relationship indicated by the terms "upper", "lower", "horizontal", etc. based on the orientation or positional relationship shown in the drawings, it is only for the convenience of clearly and simply describing the present application, and it is not indicated or implied that the elements referred to must have a specific direction, be constructed and operated in a specific orientation, and these directional terms are relative concepts for the sake of description and clarification and may be changed accordingly according to the change of orientation in which the elements in the drawings are placed. For example, if the device in the figures is turned over, elements described as "below" other elements would then be oriented "above" the other elements.

In the description of the present application and in the claims, the presence of the terms "in sequence" and "sequentially", for example the phrase "A, B, C arranged in sequence", merely indicates the order of arrangement of the elements A, B, C and does not exclude the possibility of arranging other elements between a and B and/or between B and C.

In the description of the specification and claims, the terms "based on" and "based on," if any, are used to describe one or more factors that affect the determination. The term does not exclude additional factors that influence the determination. That is, the determination may be based solely on these factors or at least partially on these factors. For example, the phrase "determining E based on D," in which case D is a factor that affects the determination of E, does not exclude that the determination of E may also be based on F.

In the description of the present specification and claims, the term "if present may generally be interchangeable with" when … "or" when … "or" in response to a determination ", depending on the context.

In the description of the specification and claims of this application, the term "configured to" if present is generally interchangeable with "… capable", "designed to", "for", or "capable", depending on the context.

Embodiments of the present application will now be described with reference to the accompanying drawings.

< example one >

Fig. 1 shows a first embodiment of a water using system, which includes a water use terminal 22, a cold water flow passage 1, a hot water flow passage 2, a mixing water flow passage 3, a mixing valve 6, a first electric heater 5, a first water temperature sensor 11, a water temperature setting element 8, and a controller 10.

In the present embodiment, the water use terminal 22 is a faucet having a water outlet communicating with the mixing flow channel 3. When the water tap is used, water flowing into the mixed water flow channel 3 from the cold water flow channel 1 and/or the hot water flow channel 2 is sent to the water outlet of the water tap for users to use. In other embodiments, the water use terminal 22 is a shower head for bathing. It will be appreciated that a portion of the mixing flow path 3 is formed inside the faucet as the water use terminal 22.

The water outlet end of the cold water flow channel 1 and the water outlet end of the hot water flow channel 2 are communicated with the water inlet end of the mixed water flow channel 3 through the same water mixing valve 6, namely, the mixed water valve 6 is connected between the cold water flow channel 1 and the mixed water flow channel 3 and between the hot water flow channel 2 and the mixed water flow channel 3. The water mixing valve 6 is used for adjusting the ratio of the communication area of the cold water flow channel 1 and the water mixing flow channel 3 to the communication area of the hot water flow channel 2 and the water mixing flow channel 3, so that the ratio of cold water to hot water entering the water mixing flow channel 3 is adjusted, that is, the flow ratio of the cold water flow channel 1 to the hot water flow channel 2 to the water mixing flow channel 3 is adjusted, an ideal water temperature is obtained in the water mixing flow channel 3 and is conveyed to the water using terminal 22, and the requirement of a user on the water using temperature is met. In this embodiment, the mixing valve 6 may also adjust a communication area between any one of the cold water flow passage 1 and the hot water flow passage 2 and the mixing water flow passage 3 to zero. The first water temperature sensor 11 is connected to the hot water flow passage 2 and is configured to obtain a current first water temperature of the hot water flow passage 2. The first electric heater 5 is connected to the water mixing flow channel 3, and can heat the water mixing flow channel 3 when the water temperature of the water mixing flow channel 3 is low, so as to increase the water temperature of the water mixing flow channel 3. The water temperature setting element 8 may be manually or acoustically operated for setting a target water temperature of the mixing water channel 3. The controller 10 is in communication connection with the first water temperature sensor 11, the first electric heater 5, the water temperature setting element 8 and the mixing valve 6, respectively, for: the current first water temperature of the hot water flow passage 2 is acquired from the first water temperature sensor 11, the target water temperature of the water mixing flow passage 3 is determined according to the operation information acting on the water temperature setting element 8, and the working states of the first electric heater 5 and the water mixing valve 6 are controlled according to the first water temperature and the target water temperature.

In practice, the user will also typically have a demand for the output flow rate from the water use terminal 22, particularly a faucet. Thus, the water usage system of the present embodiment is further provided with a first flow rate adjustment valve 7 and a manually operable (including voice-operated) flow rate setting element 9. The first flow regulating valve 7 is connected to the mixed water flow channel 3, and when the water mixing device is used, the flow of the mixed water flow channel 3 is regulated by regulating the opening degree of the first flow regulating valve 7. The flow setting element 9 is used to set a target flow of the mixing flow channel 3. The first flow regulating valve 7 and the flow setting element 9 are both communicatively connected to the controller 10, and the controller 10 may be further configured to: and controlling the working states of the mixing valve 6 and the first flow regulating valve 7 of the first electric heater 5 according to the first water temperature, the target water temperature and the target flow.

In order to enable all of the components of the above-described water utility system, except the water terminal 22, to be manufactured and sold as a single product, the user simply purchases the single product to upgrade the functionality of the original water terminal 22 (e.g., faucet, shower, etc.), and a housing 26 is provided in this embodiment. The housing 26 is used for carrying and centralizing the cold water flow passage 1, the hot water flow passage 2, the mixed water flow passage 3, the mixed water valve 6, the first electric heater 5, the first water temperature sensor 11, the water temperature setting element 8, the flow setting element 9 and the controller 10. The water temperature setting element 8 and the flow rate setting element 9 are disposed on the outer surface of the housing 26, and the cold water flow passage 1, the hot water flow passage 2, the mixed water flow passage 3, the mixed water valve 6, the first electric heater 5, the first water temperature sensor 11, and the controller 10 are accommodated and fixed in the housing 26. Moreover, for the independent product, the water inlet end of the cold water flow passage 1, the water inlet end of the hot water flow passage 2, and the water outlet end of the mixed water flow passage 3 all extend out of the housing 26 and are provided with connecting threads to facilitate connection with external pipelines and the water using terminal 22. It can be seen that the cold water flow passage 1 and the hot water flow passage 2 in the separate product each have a water inlet joint extending outside the housing 26, and the mixed water flow passage 3 in the separate product has a water outlet joint extending outside the housing 26.

To facilitate the reader's view of the internal structure of the water management system, the housing in FIG. 1 is opened.

In this embodiment, the water temperature setting element 8 and the flow setting element 9 are two independently operable knobs. In other embodiments, the water temperature setting element 8 and the flow setting element 9 are integrated in the same touch screen.

Referring to fig. 1 again, in order to better control the operation states of the first electric heater 5, the mixing valve 6 and the first flow rate adjustment valve 7, the water usage system of the present embodiment is further provided with a second water temperature sensor 12 and a third water temperature sensor 13 which are in communication with the controller 10. The second water temperature sensor 12 is connected to the cold water flow passage 1, and is configured to obtain a current second water temperature of the cold water flow passage 1. The third water temperature sensor 13 is connected to the mixed water flow channel 3 and is configured to obtain a third water temperature of the mixed water flow channel 3. Accordingly, the controller 10 can control the operation states of the first electric heater 5, the water mixing valve 6, and the first flow rate adjustment valve 7 based on the first water temperature, the target flow rate, the second water temperature, and the third water temperature.

In the present embodiment, the mixing valve 6 and the first flow regulating valve 7 are both motor-driven valves, which are commercially available or can be obtained by simply changing a conventional valve.

< example two >

Fig. 3 shows a second embodiment of a water usage system, which is similar in structure to the first embodiment and can be understood with reference to the description of the first embodiment, with the main differences being as follows:

in the present embodiment, the water system includes a cold water flow passage 1, a hot water flow passage 2, a mixed water flow passage 3, a first electric heater 5, a first water temperature sensor 11, a water temperature setting element 8, a flow rate setting element 9, and a controller 10. The water outlet end of the cold water flow channel 1 is communicated with the water inlet end of the mixed water flow channel 3 through a second flow regulating valve 14, and when the water mixing device is used, the flow of the cold water flow channel 1 can be regulated by regulating the opening degree of the second flow regulating valve 14. The water outlet end of the hot water flow passage 2 is communicated with the water inlet end of the mixed water flow passage 3 through a third flow regulating valve 15, and when the water mixing device is used, the flow of the hot water flow passage 2 can be regulated by regulating the opening degree of the third flow regulating valve 15. It can be understood that, by adjusting the opening degrees of the second flow regulating valve 14 and the third flow regulating valve 15, the water temperature of the mixed water flow channel 3 can be regulated, and the flow rate of the mixed water flow channel 3 can be regulated, so as to meet the requirements of users on the water temperature and the water flow rate. The first water temperature sensor 11 is connected to the hot water flow passage 2 and is configured to obtain a current first water temperature of the hot water flow passage 2. The first electric heater 5 is connected to the water mixing flow channel 3, and can heat the water mixing flow channel 3 when the water temperature of the water mixing flow channel 3 is low, so as to increase the water temperature of the water mixing flow channel 3. A water temperature setting element 8, which can be operated manually or acoustically, is used to set the target water temperature of the mixing channel 3. A manually operable (or voice-operated) flow setting element 9 is used to set the target flow of the mixing channel 3. The controller 10 is in communication connection with the first water temperature sensor 11, the first electric heater 5, the water temperature setting element 8, the flow setting element 9, the second flow regulating valve 14 and the third flow regulating valve 15, respectively, for controlling the operating states of the first electric heater 5, the second flow regulating valve 14 and the third flow regulating valve 15 according to the aforementioned first water temperature and the target water temperature.

In this embodiment, the water temperature setting element 8 is a pair of buttons with "+" and "-" respectively, and the flow setting element 9 is another pair of buttons with "+" and "-" respectively.

< example three >

Fig. 4 shows a third embodiment of the water using system, which has a structure similar to that of the first embodiment and can be understood with reference to the description of the first embodiment.

In the present embodiment, the water system also includes a cold water flow passage 1, a hot water flow passage 2, a mixed water flow passage 3, a first electric heater 5, a first water temperature sensor 11, a water temperature setting element 8, a flow rate setting element 9, and a controller 10. The water outlet end of the cold water flow passage 1 and the water outlet end of the hot water flow passage 2 are communicated with the water inlet end of the mixed water flow passage 3 through the same mixed water valve 6.

Different from the first embodiment, in the present embodiment, the mixing valve 6 can not only adjust the flow ratio between the cold water flow channel 1 and the hot water flow channel 2 to the mixing flow channel 3, so as to adjust the water temperature of the mixing flow channel 3, but also adjust the flow rate of the mixing flow channel 3. That is, the mixing valve 6 in the present embodiment has the functions of both the mixing valve 6 and the first flow regulating valve 7 in the first embodiment, and is equivalent to the integrated body of the mixing valve 6 and the first flow regulating valve 7 in the first embodiment.

In this embodiment, the mixing valve 6 includes a first fixed valve plate 601, a first movable valve plate 602, and a second movable valve plate 603. First movable valve plate 602 abuts against first fixed valve plate 601 in a manner of being capable of pivoting about first pivot axis c1, and second movable valve plate 603 abuts against first movable valve plate 602 in a manner of being capable of pivoting about first pivot axis c 1. That is, the first movable valve plate 602 is disposed adjacent to the first fixed valve plate 601, and the first movable valve plate 602 can pivot around the first pivot axis c1 relative to the first fixed valve plate 601; second movable valve plate 603 is disposed adjacent to first movable valve plate 602, and second movable valve plate 603 can pivot about first pivot axis c1 with respect to first movable valve plate 602. First fixed valve plate 601 has a first surface 601a abutting first movable valve plate 602, first movable valve plate 602 has a second surface 602a abutting first fixed valve plate 601 and a third surface 602b abutting second movable valve plate 603, and second movable valve plate 603 has a fourth surface 603a abutting first movable valve plate 602.

The first stationary plate 601 is provided with a first cold water hole 6011, a first hot water hole 6012, and a first water mixing hole 6013 extending to the first surface 601 a. The first movable valve plate 602 is provided with a second water mixing hole 6021 and a third water mixing hole 6022 extending from the second surface 602a to the third surface 602 b. The fourth surface 603a of the second movable valve plate 603 is formed with a first water mixing groove 6031 which is recessed inwards. The first cold water hole 6011 and the first hot water hole 6012 of the first fixing valve plate 601 are respectively communicated with the cold water flow channel 1 and the hot water flow channel 2, and the first mixed water hole 6013 on the first fixing valve plate 601 is communicated with the mixed water flow channel 3.

Referring to fig. 5, 6 and 7, it can be understood that the mixing valve 6 of the present embodiment has the following functions:

when the first movable valve plate 602 pivots around the first pivot axis c1 to be located at a first relative position with the first fixed valve plate 601, the first water mixing hole 6013 is communicated with the third water mixing hole 6022, the first cold water hole 6011 is communicated with the second water mixing hole 6021, the first hot water hole 6012 is blocked by the first movable valve plate 602, water in the cold water flow passage 1 can flow to the second water mixing hole 6021, and water in the hot water flow passage 2 is blocked at the second surface 602a of the first movable valve plate 602. In the first relative position, the size of the communication area between the second mixing hole 6021 and the first cold water hole 6011 can be adjusted by pivoting the first movable valve plate 602.

When the first movable valve plate 602 and the first fixed valve plate 601 are located at the second relative position, the first water mixing hole 6013 is communicated with the third water mixing hole 6022, the first hot water hole 6012 is communicated with the second water mixing hole 6021, the first cold water hole 6011 is blocked by the first movable valve plate 602, water in the hot water flow passage 2 can flow to the second water mixing hole 6021, and water in the cold water flow passage 1 is blocked on the second surface 602a of the first movable valve plate 602. In the second relative position, the size of the communication area between the second mixing hole 6021 and the first hot water hole 6012 can be adjusted by pivoting the first movable valve plate 602.

When the first movable valve plate 602 and the first fixed valve plate 601 are located at the third relative position, the first water mixing hole 6013 is communicated with the third water mixing hole 6022, the first cold water hole 6011 and the first hot water hole 6012 are both communicated with the second water mixing hole 6021, and water in the cold water flow passage 1 and the hot water flow passage 2 can flow to the second water mixing hole 6021. In the third relative position, the ratio of the communication area between the first cold water hole 6011 and the second water mixing hole 6021 to the communication area between the first hot water hole 6012 and the second water mixing hole 6021 may be adjusted by pivoting the first movable valve plate 602.

When the first movable valve plate 602 and the first fixed valve plate 601 are located at the fourth relative position, the first water mixing hole 6013 is communicated with the third water mixing hole 6022, the first cold water hole 6011 and the first hot water hole 6012 are both blocked by the first movable valve plate 602, and water in the cold water flow passage 1 and the hot water flow passage 2 is blocked on the second surface 602a of the first movable valve plate 602 and cannot enter the water mixing flow passage 3.

When the second movable valve plate 603 and the first movable valve plate 602 are located at the fifth relative position, the second water mixing hole 6021 and the third water mixing hole 6022 are both communicated with the first water mixing groove 6031. If the first movable valve plate 602 and the first fixed valve plate 601 are located at the first relative position, the second relative position, or the third relative position, the cold water and/or the hot water flowing into the second water mixing hole 6021 sequentially flow into the water mixing flow channel 3 through the first water mixing groove 6031, the third water mixing hole 6022, and the first water mixing hole 6013. If the first movable valve plate 602 and the first fixed valve plate 601 are located at the fourth pair of positions, although the second water mixing hole 6021, the first water mixing groove 6031, the third water mixing hole 6022 and the first water mixing hole 6013 are sequentially communicated, water in the cold water flow passage 1 and the hot water flow passage 2 is blocked by the first movable valve plate 602 and cannot enter the second water mixing hole 6021, so that water cannot flow into the water mixing flow passage 3. In the fifth relative position, the communication area between the first water mixing groove 6031 and the third water mixing hole 6022 can be adjusted by pivoting the second movable valve plate 603, and the flow rate of the water mixing flow passage 3 can be adjusted by this means.

When the second movable valve plate 603 and the first movable valve plate 602 are located at the sixth relative position, the third water mixing hole 6022 is blocked by the second movable valve plate 603. Even if the first movable valve plate 602 and the first fixed valve plate 601 are located at the first relative position, the second relative position or the third relative position, and the second water mixing hole 6021 is communicated with the first water mixing groove 6031, because the third water mixing hole 6022 is blocked by the second movable valve plate 603, water flowing to the first water mixing groove 6031 is blocked on the third surface 602b of the first movable valve plate 602, and cannot flow to the third water mixing hole 6022. It can be seen that when the second movable valve plate 603 and the first movable valve plate 602 are located at the sixth relative position, the water in the cold water flow channel 1 and the water in the hot water flow channel 2 will not enter the mixed water flow channel 3, and will not reach the water use terminal 22.

As can be seen from the above description, a user can not only cut off the water path flowing to the mixing flow channel 3 by pivoting the first movable valve plate 602 to adjust the relative position between the first movable valve plate 602 and the first fixed valve plate 601, but also cut off the water path flowing to the mixing flow channel 3 by pivoting the second movable valve plate 603 to adjust the relative position between the second movable valve plate 603 and the first fixed valve plate 601. In other embodiments, the first movable plate 602 and the first fixed plate 601 do not have the fourth relative position. In other embodiments, second movable plate 603 and first movable plate 602 do not have the sixth relative position.

Obviously, on the basis of the above technical solutions, those skilled in the art are fully capable of selecting specific structures and specific positions of the first cold water hole 6011, the first hot water hole 6012, and the first water mixing hole 6013 on the first fixed valve plate 601, the second water mixing hole 6021 and the third water mixing hole 6022 on the first movable valve plate 602, and the first water mixing groove 6031 on the second movable valve plate to implement the above functions. Referring to fig. 5 to 9, in the present embodiment, the following design is adopted:

the first cold water hole 6011, the first hot water hole 6012, the second water mixing hole 6021, the third water mixing hole 6022, and the first water mixing groove 6031 are all disposed on the same first cylindrical surface p1 (i.e., the first cylindrical surface passes through the holes and grooves), and the axial line of the first cylindrical surface p1 coincides with the first pivot axis c 1. Specifically, a first orifice 6011a of the first cold water hole 6011 at the first surface 601a, a second orifice 6012a of the first hot water hole 6012 at the first surface 601a, a third orifice 6021a of the second water mixing hole 6021 at the second surface 602a, a fourth orifice 6021b of the third surface 602b, a fifth orifice 6022a of the third water mixing hole 6022 at the third surface 602b, and a first notch 6031a of the first water mixing groove 6031 at the fourth surface 603a are arranged on the first cylindrical surface p 1.

Further, the first orifice 6011a of the first cold water hole 6011 at the first surface 601a, the second orifice 6012a of the first hot water hole 6012 at the first surface 601a, the third orifice 6021a of the second water mixing hole 6021 at the second surface 602a, and the fourth orifice 6021b of the third surface 602b, and the fifth orifice 6022a of the third water mixing hole 6022 at the third surface 602b are all arc-shaped orifices around the first pivot axis c 1. The first notch 6031a of the first mixing groove 6031 on the fourth surface 603a is an arc-shaped notch around the first pivot axis c 1.

The first orifice 6011a and the second orifice 6012a are arranged at intervals in the circumferential direction of the above-described first cylindrical surface p1, and the circumferential length of the third orifice 6021a is larger than the minimum circumferential distance of the first orifice 6011a from the second orifice 6012 a. Thus, the second mixing hole 6021 may simultaneously or alternatively connect the first cold water hole 6011 and the first hot water hole 6012. Further, the circumferential length of the third orifice 6021a is not less than the maximum circumferential distance between the first 6011a and the second orifice 6012a, so that the second mixing hole 6021 can be simultaneously communicated with the full areas of the first cold water hole 6011 and the first hot water hole 6012 — the full areas of the first 6011a and the second 6012a can be connected to the third orifice 6021 a. The "maximum circumferential distance" refers to the maximum distance between the first orifice 6011a and the second orifice 6012a in the circumferential direction of the first cylindrical surface p1, specifically, the circumferential distance between a first end 6011a1 of the first orifice 6011a away from the second orifice 6012a and a second end 6012a1 of the second orifice 6012a away from the first orifice 6011a, that is, the circumferential distance between both distal ends of the first orifice and the second orifice. Correspondingly, the "minimum circumferential distance" refers to a circumferential distance between a third end 6011a2 of the first orifice 6011a close to the second orifice 6012a and a fourth end 6012a2 of the second orifice 6012a close to the first orifice 6011a, i.e., a circumferential distance between two close ends of the first orifice and the second orifice.

In this embodiment, the maximum circumferential distance between the first orifice 6011a and the second orifice 6012a (i.e., the distance between the first end 6011a1 and the second end 6012a 1) occupies the sum of the radian occupied by the third orifice 6021a on the first cylindrical surface p1 and the radian occupied by the first cylindrical surface p1 is less than 360 °, so that the second water mixing hole 6021 can be simultaneously disconnected from the first cold water hole 6011 and the first hot water hole 6012 when the first movable valve plate 602 pivots to the corresponding position (e.g., the fourth relative position).

In this embodiment, the sixth orifice 6013a of the first mixing hole 6013 at the first surface 601a and the seventh orifice 6022b of the third mixing hole 6022 at the second surface 602a are both located on the first pivot axis c 1. Therefore, when the first movable valve plate 602 pivots to any angle about the first pivot axis c1, the third water mixing hole 6022 is always in communication with the first water mixing hole 6013. The apertures at both ends of the third mixing hole 6022, i.e. the fifth aperture 6022a at the third face 602b and the seventh aperture 6022b at the second face 602a, are arranged offset in the direction of extension of the first pivot axis c1, as shown in fig. 9.

For convenience of processing, in the present embodiment, the first cold water hole 6011, the first hot water hole 6012, the first water mixing hole 6013, and the third water mixing hole 6022 are all designed as arc-shaped through holes parallel to the first pivot axis c1 and having a uniform cross section, and the first water mixing groove 6031 is designed as an arc-shaped groove having a groove depth parallel to the first pivot axis c1 and having a uniform cross section.

In this embodiment, the sum of the radian measure occupied by the first notch 6031a on the first cylindrical surface p1 and the radian measure occupied by the fourth notch 6021b on the first cylindrical surface p1 is greater than 360 degrees, so that the second water mixing hole 6021 and the first water mixing groove 6031 always keep communicating when the second movable valve plate 603 pivots to any position around the first pivot axis c 1. The third mixing hole 6022 is formed in the above-mentioned fifth hole 6022a of the third surface 602b, and the sum of the radian measure of the first cylindrical surface p1 and the radian measure of the first notch 6031a on the first cylindrical surface p1 is less than 360 °, so that the first mixing groove 6031 can be selectively communicated with or blocked from the third mixing hole 6022 by rotating the second movable valve plate 603.

In order to enable the second mixing hole 6021 to communicate with the first mixing groove 6031 over the entire area, that is, to enable the entire area of the fourth hole 6021b to be connected to the first notch 6031a of the first mixing groove 6031, the circumferential length of the first notch 6031a is set to be greater than the circumferential length of the fourth hole 6021b in the present embodiment.

In this embodiment, a rotating shaft 604 coaxially arranged with the first pivot axis c1 is fixed on the first movable valve plate 602, a rotating sleeve 605 coaxially arranged with the first pivot axis c1 is fixed on the second movable valve plate 603, the rotating shaft 604 is pivotally disposed through the rotating sleeve 605, and the rotating shaft 604 has an extending end extending out of the rotating sleeve 605. The first motor 16 is connected to the rotating sleeve 605 through a first gear assembly to drive the rotating sleeve 605 to pivot, so as to drive the second movable valve plate 603 to pivot. The second motor 16 is connected to the rotating shaft 604 through a second gear assembly to drive the rotating shaft 604 to pivot, so as to drive the first movable valve plate 602 to pivot. The first motor 16 and the second motor 16 are both in signal communication with the controller 10.

Specifically, the first gear assembly includes two gears 17 engaged with each other, wherein one gear 17 is coaxially fixed with the rotary sleeve 605, and the other gear 17 is coaxially fixed with the output shaft of the first motor 16. The second gear assembly also includes two gears 17 engaged with each other, wherein one gear 17 is fixed coaxially with the rotating shaft 604, and the other gear 17 is fixed coaxially with the output shaft of the second motor 16.

In this embodiment, the mixing valve 6 further has a valve housing 606, and the valve housing 606 is a bottomed cylindrical structure with one end closed and the other end open. The first fixed valve plate 601, the first movable valve plate 602, and the second movable valve plate 603 are all accommodated in the valve housing 606, and the first fixed valve plate is fixed to the valve housing. The closed end of the valve housing 606, i.e., the "bottom" of the valve housing 606, is provided with a second cold water hole 6061, a second hot water hole 6062 and a fourth water mixing hole 6063, which are respectively communicated with the first cold water hole 6011, the first hot water hole 6012 and the first water mixing hole 6013. The orifices of the second cold water hole 6061, the second hot water hole 6062 and the fourth mixing water hole 6063 at the outer side surface of the closed end of the valve housing 606 are circular orifices, and the three circular orifices are pulled apart by a large distance to facilitate connection with an external water pipe. The shapes and positions of the orifices of the second cold water hole 6061, the second hot water hole 6062 and the fourth water mixing hole 6063 on the inner side surface of the closed end of the valve housing 606 correspond to those of the first cold water hole 6011, the first hot water hole 6012 and the first water mixing hole 6013, so that the butt joint of the second cold water hole 6061 and the first cold water hole 6011, the butt joint of the second hot water hole 6062 and the first hot water hole 6012, and the butt joint of the fourth water mixing hole 6063 and the first water mixing hole 6013 are better realized. The second cold water hole 6061 and the second hot water hole 6062 are arranged with the orifices on the inner and outer sides of the closed end of the valve housing being staggered as shown in fig. 6, 9 and 10.

In order to improve the butt sealing performance between each hole on the valve housing 606 and each hole on the first fixing valve plate 601, a sealing ring 608 is further interposed between the bottom of the valve housing 606 and the first fixing valve plate 601 in this embodiment.

A valve cap 607 for closing the opening is fixed to the opening end of the valve housing 606, and both the first motor 16 and the second motor 16 are mounted inside the valve cap 607.

< example four >

Fig. 14 shows a fourth embodiment of a water usage system, which is similar in structure to the first embodiment and can be understood with reference to the description of the first embodiment, with the main differences being as follows:

the water system of the embodiment is also provided with a return water channel 4 communicated with the hot water channel 2. A water return valve 18 is arranged on a communication path of the water return flow passage 4 and the hot water flow passage 2, and the water return valve 18 is an electromagnetic valve and is in communication connection with the controller 10. The controller 10 is used for controlling the water return valve 18 to open or close, and further controlling the water return flow passage 4 to be communicated with or separated from the hot water flow passage 2.

The water system of the embodiment is provided with the return water channel 4 communicated with the hot water channel 2, so that when the temperature of the hot water channel 2 is low, low-temperature water in the hot water channel can be quickly led out, and hot water which is not lost at the upstream can flow in; and when the water temperature of the hot water flow passage 2 is enough, the backwater flow passage 4 is separated from the hot water flow passage 2. The controller 10 may control the return valve 18 to be opened or closed according to the first water temperature, the target temperature, and the target flow rate, thereby controlling the return flow passage 4 to be communicated with or blocked from the hot water flow passage 2.

In another embodiment, the water usage system is further configured with a hot water tank and a fourth water temperature sensor. Wherein, the hot-water cylinder is communicated with the hot-water flow passage 2 and is used for providing a hot-water source for the hot-water flow passage 2, and the fourth water temperature sensor is connected to the hot-water cylinder so as to obtain the fourth water temperature of the hot-water cylinder. The hot water in the hot water tank can be provided by a solar water heater. The fourth water temperature sensor is in communication with the controller 10. In this way, the controller 10 may also control the water return valve 18 to be opened or closed according to the first water temperature (i.e., the hot water channel 2 water temperature) and the fourth water temperature (i.e., the hot water tank water temperature). For example, when the first water temperature is equal to or lower than the fourth water temperature, it is indicated that the upstream water temperature is not sufficient and no water return is necessary, and therefore, the water return valve 18 should be controlled to be closed to disconnect the connection between the water return flow passage 4 and the hot water flow passage 2.

< example five >

Fig. 15 shows a fifth embodiment of a water usage system, which is similar in structure to the fourth embodiment and can be understood with reference to the description of the fourth embodiment, with the main differences being: the return valve 18 provided in the communication path between the return water passage 4 and the hot water passage 2 in this embodiment is not an electromagnetic valve but an electrically controlled valve driven by the motor 16.

< example six >

Fig. 16 to 25 show a sixth embodiment of a water usage system, which is similar in structure to the fifth embodiment and can be understood with reference to the description of the fifth embodiment, with the main differences being:

in this embodiment, the water system comprises a first plate 19 and a second plate 20 secured in a stack, the first plate 19 having a first inner surface facing the second plate 20, the second plate 20 having a second inner surface facing the first plate 19. The first inner surface of the first plate 19 is formed with a first channel 1901 recessed away from the second inner surface, and the second inner surface of the second plate 20 is formed with a second channel 2001 recessed away from the first inner surface. The first channel 1901 and the second channel 2001, which are mutually matched, together form the cold water channel 1, the hot water channel 2, the mixed water channel 3, and the return water channel 4. The cold water flow passage 1, the hot water flow passage 2, the mixed water flow passage 3, and the return water flow passage 4 are formed between the first plate 19 and the second plate 20.

It can be seen that the cold water flow passage 1, the hot water flow passage 2, the mixed water flow passage 3 and the return water flow passage 4 are not respectively formed in the corresponding water pipes but are integrally formed between two mutually butted plates with grooves, so that the integrity and compactness of the water path are improved, the manufacturing and assembly are facilitated, and the strength of the water path is improved.

In this embodiment, the first plate 19 and the second plate 20 are both made of metal and are welded and fixed, and the first slot 1901 and the second slot 2001 are punched grooves respectively formed in the first plate 19 and the second plate 20. In other embodiments, the first plate 19 and the second plate 20 are compression molded structures that are secured by screw locking.

The first plate 19 is provided with a plurality of mounting holes penetrating therethrough and communicating with the first channel 1901, for mounting the first water temperature sensor 11, the second water temperature sensor 12, and the third water temperature sensor 13, respectively. A first electric heater, not shown, is disposed through the mixing channel between the plates.

In the present embodiment, the second flow rate adjustment valve 14, the third flow rate adjustment valve 15, and the water return valve 18 have the same structure, and these three valves each include a second fixed valve plate 1401 and a third movable valve plate 1402, respectively, wherein the third movable valve plate 1402 abuts against the second fixed valve plate 1401 in a manner pivotable about a second pivot axis c 2. Two water holes 14011 are arranged on the second fixed valve plate 1401 in a penetrating way, and two water gaps 1402 corresponding to the two water holes 14011 are arranged on the third movable valve plate 1402. When the third movable valve plate 1402 pivots to the angle shown in fig. 23, the water break 1402 just coincides with the water discharge hole 14011, and the water flow can pass through the valve smoothly. When the third movable valve plate 1402 pivots to the angle shown in fig. 24, the water discharge opening 1402 is misaligned with the water discharge hole 14011, the solid portion of the third movable valve plate 1402 shields and seals the water discharge hole 14011, and water cannot pass through the valve. When the third movable valve plate 1402 pivots between the angular position shown in fig. 23 and the angular position shown in fig. 24, the communication area between the water passage slits 1402 and the water passage holes 14011 changes, whereby the opening degree of the valve is adjusted, and the flow rate of water is adjusted.

In the present embodiment, the pivoting of the third movable valve plate 1402 on the second flow rate adjustment valve 14, the third flow rate adjustment valve 15, and the water return valve 18 is driven by the motor 16, and one motor 16 is provided for each of the three valves.

< example seven >

Fig. 26 to 50 show a seventh embodiment of a water usage system, which is similar in structure to the fifth embodiment and can be understood with reference to the description of the fifth embodiment, with the main differences being:

in the present embodiment, the water system includes the first and

second modules

21 and 28, and the cold water flow passage 1, the hot water flow passage 2, the mixed water flow passage 3, and the return water flow passage 4 are all formed at least partially in the first module 21, not in the water pipe. The first member 21 has a fifth surface 2101a, a sixth surface 2101b and a seventh surface 2102a, wherein the fifth surface 2101a and the seventh surface 2102a are located on opposite sides of the first member 21, respectively. The cold water flow passage 1, the hot water flow passage 2, and the return water flow passage 4 each penetrate from the fifth surface 2101a to the sixth surface 2101b, and the hot water flow passage 2 has two flow port openings at the sixth surface 2101 b. Specifically, the cold water flow path 1 has a first flow port 101 at the fifth surface 2101a and a second flow port 102 at the sixth surface 2101 b. The hot water flow path 2 has a third flow port 201 on the fifth surface 2101a, and a fourth flow port 202 and a fifth flow port 203 spaced apart from each other on the sixth surface 2101 b. The return water flow passage 4 has a sixth flow passage opening 401 at the sixth surface 2101b and a seventh flow passage opening 402 at the fifth surface 2101 a. The mixing flow channel 3 comprises two flow channel sections separated from each other, namely a first mixing flow channel section 3a and a second mixing flow channel section 3 b. The first mixed water flow passage section 3a has an eighth flow port 301 and a ninth flow port 302 on the sixth surface 2101 b. The second mixing flow path section 3b extends from the sixth surface 2101b to the seventh surface 2102 a. The second mixing flow path section 3b has a tenth flow opening 303 at the seventh surface 2102a and an eleventh flow opening 304 at the sixth surface 2101 b. The faucet is connected to the eleventh runner port 304.

The second, fourth and

eighth junctions

102, 202, 301 are adjacent in pairs, the fifth and

sixth junctions

203, 401 are adjacent in pairs, and the ninth and

tenth junctions

302, 303 are adjacent in pairs.

In the present embodiment, the mixing valve 6 comprises a third fixed valve plate 609 and a fourth movable valve plate 610, the fourth movable valve plate 610 abuts against the third fixed valve plate 609 in a manner of being capable of pivoting about a third pivot axis c3, and the third fixed valve plate 609 is fixed on the sixth surface 2101b of the first component 21. The third fixed valve plate 609 has an eleventh surface 609a that abuts the fourth movable valve plate 610, and the fourth movable valve plate 610 has an eighth surface 610a that abuts the third fixed valve plate 609. The third stationary valve plate 609 is provided with a third cold water hole 6091, a third hot water hole 6092 and a fifth water mixing hole 6093 which extend to the eleventh surface 609 a. The third cold water hole 6091 is communicated with the second flow port 102 of the cold water flow passage 1, the third hot water hole 6092 is communicated with the fourth flow port 202 of the hot water flow passage 2, and the fifth mixing hole 6093 is communicated with the eighth flow port 301 of the mixing flow passage 3. The eighth surface 610a of the fourth movable valve plate 610 is formed with a second water mixing groove 6101 recessed inwards. The second mixing groove 6101 has a second notch 6101a on the eighth surface 610 a.

When the fourth movable valve plate 610 and the third fixed valve plate 609 are located at the seventh relative position, the second water mixing groove 6101 is respectively communicated with the third cold water hole 6091 and the fifth water mixing hole 6093, the third hot water hole 6092 is blocked by the fourth movable valve plate 610, and only the water in the cold water flow passage 1 can flow to the water mixing flow passage 3 through the water mixing valve 6.

When the fourth movable valve plate 610 and the third fixed valve plate 609 are located at the eighth relative position, the second water mixing groove 6101 is respectively communicated with the third hot water hole 6092 and the fifth water mixing hole 6093, the third cold water hole 6091 is blocked by the fourth movable valve plate 610, and only the water in the hot water flow passage 2 can flow to the water mixing flow passage 3 through the water mixing valve 6.

When the fourth movable valve plate 610 and the third fixed valve plate 609 are located at the ninth relative position, the second water mixing groove 6101 is respectively communicated with the third cold water hole 6091, the third hot water hole 6092 and the fifth water mixing hole 6093, and water in the cold water flow passage 1 and the hot water flow passage 2 can flow to the water mixing flow passage 3 through the water mixing valve 6.

When the fourth movable valve plate 610 and the third fixed valve plate 609 are located at the tenth relative position, the third cold water hole 6091 and the third hot water hole 6092 are blocked by the fourth movable valve plate 610, and the water in the cold water flow passage 1 and the water in the hot water flow passage 2 cannot flow to the mixed water flow passage 3.

Obviously, on the basis of the above technical solutions, those skilled in the art are fully capable of selecting the specific structure and specific position of the third cold water hole 6091, the third hot water hole 6092, the fifth water mixing hole 6093 on the third fixed valve plate 609, and the second water mixing groove 6101 on the fourth movable valve plate 610, so as to achieve the above functions. Referring to fig. 35 to 44, in the present embodiment in particular, the following preferred design is adopted:

the eighth orifice 6091a of the third cold water hole 6091 on the eleventh surface 609a, the ninth orifice 6092a of the third hot water hole 6092 on the eleventh surface, and the second notch 6101a of the second water mixing groove 6101 are all arranged on the second cylindrical surface p 2. Further, the axis of the second cylindrical surface p2 coincides with the third pivot axis c 3. This allows the corresponding orifice to be selectively communicated or blocked with the notch when the fourth movable valve plate 610 is pivoted.

The fifth water mixing hole 6093 is disposed on the third pivot axis c3 at both the thirteenth hole 6093a of the eleventh surface 609a and the second notch 6101a of the second water mixing groove 6101. Therefore, when the fourth movable valve blade pivots to any angle around the third pivot axis c3, the second water mixing groove 6101 is always kept in communication with the fifth water mixing hole 6093.

Further, the second slot 6101a includes a first fan-shaped portion 6101a1 and a second fan-shaped portion 6101a2, the first radius of the first fan-shaped portion 6101a1 being less than the second radius of the second fan-shaped portion. The third orifice is a circular orifice with a radius equal to the first radius, and the first orifice and the second orifice are both arc orifices with an outside radius equal to the second radius. Also, the circle center line of the first sector portion 6101a1, the circle center line of the second sector portion 6101a2, the circle center line of the eighth aperture 6091a, and the circle center line of the ninth aperture 6092a all coincide with the third pivot axis c 3. Thereby facilitating control of the access area of the corresponding apertures and notches.

Further, in the length direction of the first pivot axis, the first sector portion 6101a1 is projected entirely within the thirteenth aperture 6093 a; in the direction of the length of the first pivot axis, eighth aperture 6091a can be projected entirely within the second sector, and ninth aperture 6092a can also be projected entirely within second sector 6101a 2.

Further, the arc degree occupied by the second notch 6101a (particularly, the second sector portion 6101a2 of the second notch) on the second cylindrical surface p2 is equal to the arc degree occupied by the maximum circumferential distance between the eighth port 6091a and the ninth port 6092a on the second cylindrical surface p2, and the arc degree of the second sector portion 6101a2 is less than 180 °. So make, fourth movable valve piece can be with the shutoff simultaneously of third cold water hole and third hot water hole.

In this embodiment, third cold water hole, third hot water hole and fifth water mixing hole are the even hole of cross section, and the second water mixing groove is the even groove of cross section to third cold water hole, third hot water hole and fifth water mixing hole all link up the third fixed valve piece along the length direction of third pivot axis, and the second water mixing groove is inwards sunken from the eighth surface along the length direction that is on a parallel with the third pivot axis. In the present embodiment, the water return valve 18 includes a fourth fixed valve plate 1801 and a fifth movable valve plate 1802, the fifth movable valve plate 1802 abuts against the fourth fixed valve plate 1801 in a manner pivotable about a fourth pivot axis c4, and the fourth fixed valve plate 1801 is fixed to the sixth surface 2101b of the first member 21. The fourth stationary valve plate 1801 is provided with a first return hole 18011 and a second return hole 18012, wherein the first return hole 18011 is communicated with the fifth channel opening 203 of the hot water channel 2, and the second return hole 18012 is communicated with the sixth channel opening 401 of the return water channel 4. The fifth movable valve plate 1802 has a ninth surface 1802a abutting against the fourth fixed valve plate 1801, and the ninth surface 1802a is formed with a first water return groove 18021 recessed inward.

When the fifth movable valve plate 1802 and the fourth fixed valve plate 1801 are located at the eleventh relative position, the first water return channel 18021 is respectively communicated with the first water return hole 18011 and the second water return hole 18012, and water in the hot water flow channel 2 can flow to the water return flow channel 4 through the water return valve 18.

When the fifth movable valve plate 1802 and the fourth fixed valve plate 1801 are located at the twelfth relative position, the first return hole 18011 or/and the second return hole 18012 is blocked by the fifth movable valve plate 1802, the first return groove 18021 is not blocked by the first return hole 18011 or/and the second return hole 18012, and water communicated with the hot water flow passage 2 is blocked by the return valve 18 and cannot flow to the return water flow passage 4.

In order to increase the maximum flow area of the water return valve 18, in this embodiment, an inwardly recessed second water return groove 18022 is further provided on the above-mentioned ninth surface 1802a of the fifth movable valve plate 1802, and the second water return groove 18022 is spaced apart from the first water return groove 18021. When the fifth movable valve plate 1802 and the fourth fixed valve plate 1801 are located at the eleventh relative position, the second water return groove 18022 is also communicated with the first water return hole 18011 and the second water return hole 18012, respectively. When the fifth movable valve plate 1802 and the fourth fixed valve plate 1801 are located at the twelfth relative position, the second water return groove 18022 is also not provided with the first water return hole 18011 and the second water return hole 18012, so that the water in the hot water flow passage 2 still cannot enter the water return flow passage 4 through the water return valve 18.

The first flow rate adjustment valve 7 includes a fifth fixed valve plate 701 and a sixth movable valve plate 702, the sixth movable valve plate 702 abuts against the fifth fixed valve plate 701 in a pivotable manner about a fifth pivot axis c5, and the fifth fixed valve plate 701 is fixed to the sixth surface 2101b of the first member 21. The fifth fixed valve plate 701 is provided with a sixth water mixing hole 7011 and a seventh water mixing hole 7012, wherein the sixth water mixing hole 7011 is communicated with the ninth flow passage 302 of the water mixing flow passage 3, and the seventh water mixing hole 7012 is communicated with the tenth flow passage 303 of the water mixing flow passage 3. The tenth surface 702a of the sixth movable valve plate 702 abutting against the fifth fixed valve plate 701 is formed with a third water mixing groove 7021 recessed inward.

When the sixth movable valve plate 702 and the fifth fixed valve plate 701 are located at the thirteenth relative position, the third water mixing groove 7021 is respectively communicated with the sixth water mixing hole 7011 and the seventh water mixing hole 7012, so that the water in the first water mixing flow passage section 3a can flow into the second water mixing flow passage section 3b through the first flow regulating valve 7, and further flow from the eleventh flow passage 304 of the second water mixing flow passage section 3b to the water using terminal 22. In addition, in the thirteenth relative position, the communication area between the third water mixing groove 7021 and the sixth water mixing hole 7011 and/or the seventh water mixing hole 7012 can be adjusted by adjusting the pivot angle of the sixth movable valve plate 702, that is, the opening degree of the first flow regulating valve 7 is adjusted, so as to adjust the flow rate of the water mixing flow passage 3.

When the sixth movable valve plate 702 and the fifth fixed valve plate 701 are located at the fourteenth relative position, the sixth water mixing hole 7011 or/and the seventh water mixing hole 7012 is/are blocked by the sixth movable valve plate 702, and the water in the first water mixing flow passage section 3a is blocked by the first flow regulating valve 7 and cannot flow to the second water mixing flow passage section 3b and the water use terminal 22.

In order to facilitate the installation and fixation of the third fixed valve plate 609 of the water mixing valve 6, the fourth fixed valve plate 1801 of the water return valve 18, and the fifth fixed valve plate 701 of the first flow regulating valve 7 on the first component 21, in this embodiment, three assembling grooves 2102b are provided on the sixth surface 2101b of the first component 21, and the third fixed valve plate 609, the fourth fixed valve plate 1801, and the fifth fixed valve plate 701 are respectively embedded in the three assembling grooves 2102 b.

In other embodiments, the third fixed valve plate 609, the fourth fixed valve plate 1801, the fifth fixed valve plate 701 and the first component 21 are of an integrated structure made of the same material, that is, the third fixed valve plate 609, the fourth fixed valve plate 1801 and the fifth fixed valve plate 701 are integrally fixed on the first component 21. Equivalently, the third fixed valve plate 609, the fourth fixed valve plate 1801 and the fifth fixed valve plate 701 in fig. 27 are removed, and the device parts at the three assembling grooves 2102b of the sixth surface 2101b are directly regarded as the third fixed valve plate 609, the fourth fixed valve plate 1801 and the fifth fixed valve plate 701 respectively.

To facilitate the production of the first component 21 described above, in the present embodiment the first component 21 comprises a third plate 2101 and a fourth plate 2102 fixed against each other. The cold water flow passage 1, the hot water flow passage 2, the mixed water flow passage 3, and the return water flow passage 4 are formed by the third plate 2101 and the fourth plate 2102 together. The above-mentioned fifth surface 2101a and seventh surface 2102a of the first member 21 are formed on the third plate 2101 specifically, and the above-mentioned sixth surface 2101b of the first member 21 is formed on the fourth plate 2102 specifically. The twelfth surface of the third plate 2101, which is adjacent to the fourth plate 2102, is formed with five inwardly recessed channels, and one end of each of the three channels is provided with a through hole extending to the fifth surface 2101a, which respectively forms the first flow port 101, the third flow port 201 and the seventh flow port 402, and one end of one channel is provided with a through hole extending to the seventh surface 2102 a. The fourth plate 2102 has a plurality of water supply holes formed therethrough. After the fourth plate 2102 and the third plate 2101 are assembled, the first cover body closes most of the area of the five channel notches on the twelfth surface, the water outlet holes are respectively located at the positions corresponding to the channel notches to communicate with the corresponding channel notches, so that the cold water flow channel 1, the hot water flow channel 2, the mixed water flow channel 3 and the return water flow channel 4 of the structure are formed by the third plate 2101 and the fourth plate 2102 together, and the water outlet holes on the fourth plate 2102 respectively form corresponding flow channel ports.

In this embodiment, the pivoting of the fourth movable valve plate 610, the fifth movable valve plate 1802 and the sixth movable valve plate 702 are driven by three motors 16, respectively. Specifically, each motor 16 is connected with the corresponding movable valve plate through a worm 24 and a worm wheel 23 which are meshed with each other, wherein the worm wheel 23 is fixed with the movable valve plate and is coaxially arranged with the corresponding pivot axis, the socket rod is coaxially fixed with an output shaft of the motor 16, the motor 16 operates to drive the worm 24 to pivot, the worm 24 drives the worm wheel 23 meshed with the worm to pivot, and the worm wheel 23 drives the corresponding fixed valve body fixed with the worm wheel to pivot synchronously. The three motors 16 are all connected to the controller 10 in communication, so that the controller 10 can control the operation of the mixing valve 6, the return valve 18 and the first flow control valve 7.

The second component 28 is attached and fixed to the fourth plate side of the first component, the second component 28 includes a fifth plate 2801 and a sixth plate 2802 attached and fixed, and the third plate 2101, the fourth plate 2102, the fifth plate 2801, and the sixth plate 2802 are arranged in this order. The second module 28 and in particular the sixth plate on the second module is mainly protective.

In this embodiment, the first flow port 101 of the cold water flow channel 1, the third flow port 201 of the hot water flow channel 2, and the seventh flow port 402 of the return water flow channel 4 are respectively connected to a cold water joint, a hot water joint, and a return water joint which are fixed to the first component and have flow channels, so as to facilitate connection with an external pipeline. Obviously, the cold water joint, the hot water joint and the return water joint are also part of the cold water flow passage 1, the hot water flow passage 2 and the return water flow passage 4 in the water using system respectively. A first water temperature sensor 11 for sensing the water temperature of the hot water flow passage 2 and a second water temperature sensor 12 for sensing the water temperature of the cold water flow passage 1 are installed at the hot water joint and the cold water joint, respectively, as shown in fig. 26 and 27.

In the present embodiment, the water temperature setting element 8 and the flow rate setting element 9 of the water using system are integrated into a water adjusting handle which can be lifted up and down and rotated left and right, and the water adjusting handle is in communication with the controller 10, so that the controller 10 can control the first electric heater 5, the water mixing valve 6, the water return valve 18 and the first flow rate adjusting valve 7 to operate in corresponding states in response to the operation of the water adjusting handle. For example: when the user presses the water adjustment handle to the lowest lowering position, it indicates that the user wants the desired outlet flow to be zero (the faucet is turned off). When the user lifts the water adjusting handle to enable the water adjusting handle to be located at the highest lifting position, the ideal water outlet flow rate desired by the user is the maximum water outlet flow rate. When the user adjusts the water adjusting handle to a selected position between the lowest lowering position and the highest lifting position, the ideal water outlet flow rate desired by the user is between zero and the maximum water outlet flow rate, and the higher the selected position is, the higher the ideal water outlet flow rate desired by the user is. When the user lifts the water adjusting handle and rotates the water adjusting handle to the left position, the ideal outlet water temperature desired by the user is low. When the user lifts the water adjusting handle and rotates the water adjusting handle to the right position, the ideal outlet water temperature which is wanted by the user is high.

Therefore, the water transfer switch is similar to the traditional mechanical water transfer switch in the aspects of control mode and control effect, and more accords with the traditional use habit of people.

< example eight >

Fig. 51 to 54 show an eighth embodiment of the water system of the present application, which has a structure similar to that of the seventh embodiment, and can be understood by referring to the description of the seventh embodiment, with the main difference that: the water return valve in this embodiment is a commercially available electromagnetic valve.

< example nine >

Fig. 55 shows a ninth embodiment of the water system of the present application, which has a structure similar to that of the second embodiment, and can be understood by referring to the description of the second embodiment, the main differences are as follows:

In practical application, the water in the hot water flow passage 2, especially the water at the water outlet end of the hot water flow passage 2, is often lost due to heat dissipation after being placed for a long time, and if the low-temperature water after heat dissipation and temperature reduction in the hot water flow passage 2 is directly sent into the water mixing flow passage 3 and the water using terminal 22, the use experience of a user is reduced. In contrast, the embodiment is provided with the return water channel 4 communicated with the hot water channel 2, so that when the temperature of the hot water channel 2 is low, low-temperature water in the hot water channel can be quickly led out, and hot water which is not lost at the upstream can flow in; and when the water temperature of the hot water flow passage 2 is enough, the backwater flow passage 4 is separated from the hot water flow passage 2. The controller 10 may control the return valve 18 to be opened or closed according to the first water temperature, the target temperature, and the target flow rate, thereby controlling the return flow passage 4 to be communicated with or blocked from the hot water flow passage 2.

< example ten: water supply method

The present embodiment provides a water supply method for a water system, which is applicable to the water system of any one of the above embodiments. For those skilled in the art, as long as the water system includes the cold water flow channel 1, the hot water flow channel 2, the mixing water flow channel 3 respectively communicated with the cold water flow channel 1 and the hot water flow channel 2, and the first electric heater 5 connected to the mixing water flow channel 3, a structural basis for implementing the water supply method of the present embodiment is provided.

Referring to fig. 56, the water supply method of the present embodiment includes:

s101, acquiring a target water temperature of the mixed water flow passage 3 and a current first water temperature of the hot water flow passage 2.

For example, in any of the first to ninth embodiments described above, the water use system receives an operation applied to the water temperature setting element 8, determines the target water temperature of the mixing water flow passage 3 based on the operation, and acquires the current first water temperature of the hot water flow passage 2 from the first water temperature sensor 11. In other embodiments, the user sets the target temperature of the mixing flow channel 3 through an application installed in the mobile terminal. In some embodiments, the target water temperature of the mixing water flow passage 3 and the current first water temperature of the hot water flow passage 2 may be periodically obtained within a preset time or in response to a user operation, and once the target water temperature and the first water temperature satisfy the following respective conditions, the water system performs various corresponding actions as described below.

In some embodiments, the water system is further provided with a water supply switch, and when a user performs an opening operation on the water supply switch, the water system obtains the target water temperature of the mixing water flow passage 3 from the water temperature setting element 8 and obtains the current first water temperature of the hot water flow passage 2 from the first water temperature sensor 11 in response to the opening operation. It is understood that the flow setting element 9 is a special water supply switch with a flow setting function, and when the user operates the flow setting element 9 to set a non-zero flow, the water supply switch is turned on to indicate that water supply is required, and the water system obtains the target water temperature of the mixing water flow passage 3 from the water temperature setting element 8 and obtains the current first water temperature of the hot water flow passage 2 from the first water temperature sensor 11. In general, before the water supply switch is turned on, a user operates the water temperature setting element 8 to set a target water temperature of the water mixing flow passage, and then turns on the water supply switch; if the user does not perform the operation of setting the water temperature on the water temperature setting element 8 before turning on the water supply switch, the water use system may acquire the previously set water temperature from the water temperature setting element 8 as the target water temperature.

S102, if the first water temperature is less than the target water temperature, the cold water flow channel 1 is controlled to be separated from the mixed water flow channel 3, so that the hot water flow channel 2 supplies water to the mixed water flow channel 3, the first electric heater 5 is controlled to heat the mixed water flow channel 3 at a first power, and the mixed water flow channel 3 is controlled to supply water at a first flow rate (for example, to supply water to a faucet), wherein the first flow rate is determined according to the first power and a first temperature difference, and the first temperature difference is a temperature difference between the target water temperature and the first water temperature.

It can be understood that when the first water temperature is less than the target water temperature, it indicates that the ideal water temperature of the mixing water channel 3 and the ideal outlet water temperature of the water use terminal 22 are higher than the current actual water temperature of the hot water channel 2, and even if the cold water channel 1 is closed and only the water of the hot water channel 2 is supplied to the mixing water channel 3 and the water use terminal 22, the requirement of the user on the water temperature cannot be met. Therefore, the mixed water flow passage 3 needs to be heated to raise the water temperature to the target water temperature.

The first power is the heating power of the first electric heater 5 to the water mixing flow passage 3, and may be a power set by a person, or a power determined by a default of the system or according to related data. For the first electric heater 5 whose power is not adjustable, the first power is the inherent power of the first electric heater 5 itself, and is usually the rated power of the first electric heater 5, in which case the maximum power and the minimum power of the first electric heater 5 are the same; for the first electric heater 5, which is power adjustable, the first power may be a power selected manually by the user or may be a power determined automatically by the water system in response to relevant data.

The first electric heater 5 for heating the mixing channel 3 has a limited power and is usually fixed and non-adjustable. The water mixing flow channel 3 is kept at the target water temperature by adopting the power with limited or even uncontrollable size and continuously supplies water, so that the flow of the water mixing flow channel 3 (the flow of the water mixing flow channel 3 is equal to the flow of the hot water flow channel 2 because only the hot water flow channel 2 supplies water to the water mixing flow channel 3) needs to be correspondingly adjusted. Therefore, in the embodiment, the first flow rate of the mixing flow channel 3 is determined according to the temperature difference (i.e. the first temperature difference) between the target water temperature and the first power, and then the mixing flow channel 3 is controlled to supply water at the determined first flow rate, which helps to keep the water temperature of the water flow in the mixing flow channel 3 at the target water temperature, and helps to make the outlet water temperature of the user water terminal 22 approach the ideal outlet water temperature.

As will be understood by those skilled in the art, the first flow rate determined according to the first power and the first temperature difference is a flow rate at which the water temperature of the mixing flow passage 3 can be maintained (including substantially maintained) at the target water temperature when the first electric heater 5 heats the mixing flow passage 3 at the first power.

For example, in any of the above embodiments one, four, five, seven and eight, when the controller 10 determines that the first water temperature it has acquired < the target water temperature, the controller 10 controls the operation of the mixing valve 6 in response to the determination to block the cold water flow passage 1 from the mixing flow passage 3, to keep only the communication between the hot water flow passage 2 and the mixing flow passage 3, to allow only the water in the hot water flow passage 2 to flow to the mixing flow passage 3, to control the first electric heater 5 to heat the mixing flow passage 3 at its rated power, meanwhile, a first flow rate (the first flow rate is the flow rate at which the water temperature of the mixed water flow passage 3 can be kept at the target water temperature when the first electric heater 5 heats the mixed water flow passage 3 at the rated power) determined according to the temperature difference obtained by subtracting the first water temperature from the rated power and the target water temperature is controlled by the opening degree of the first flow rate adjusting valve 7 so that the mixed water flow passage 3 flows at the determined first flow rate.

For another example, in the water system according to any one of the second embodiment, the sixth embodiment and the ninth embodiment, when the controller 10 determines that the first water temperature acquired by the controller 10 is less than the target water temperature, the controller 10 controls the second flow rate adjustment valve 14 to operate to block the cold water flow passage 1 from the mixed water flow passage 3, only the hot water flow passage 2 is kept in communication with the mixed water flow passage 3, controls the first electric heater 5 to heat the mixed water flow passage 3, and controls the opening degree of the third flow rate adjustment valve 15 to allow the hot water flow passage 2 to supply water to the mixed water flow passage 3 at the determined first flow rate, thereby allowing the mixed water flow passage 3 to flow water at the first flow rate.

In another embodiment, the water supply method further includes:

acquiring a current second water temperature of the cold water flow channel 1;

for example, in the first embodiment, the second water temperature sensor 12 is used to obtain the current second water temperature of the cold water channel 1.

If the first water temperature is larger than the target water temperature and the second water temperature is smaller than the target water temperature, the water mixing flow channel 3 is communicated with the cold water flow channel 1 and the hot water flow channel 2, the hot water flow channel 2 is not heated, the ratio of the second temperature difference to the third temperature difference is determined as the flow ratio of the cold water flow channel 1 to the hot water flow channel 2, the cold water flow channel 1 and the hot water flow channel 2 are controlled to supply water to the water mixing flow channel 3 according to the determined flow ratio, wherein the second temperature difference is the temperature difference between the first water temperature and the target water temperature, and the third temperature difference is the temperature difference between the target water temperature and the second water temperature. The aim of this strategy is also to make the water temperature of the mixing channel 3 equal (including substantially equal) to the target water temperature.

In another embodiment, if the first water temperature obtained in S101 is equal to the target water temperature, the cold water flow passage 1 is blocked from the mixing water flow passage 3, only the communication between the mixing water flow passage 3 and the hot water flow passage 2 is kept, the mixing water flow passage 3 is not heated, and the hot water flow passage 2 is controlled to directly supply water to the mixing water flow passage 3.

In practical applications, the user usually has a corresponding demand for the water outlet flow of the water use terminal 22, for example, the user wants to obtain a small water outlet flow when making tea, and a large water outlet flow when washing dishes. Therefore, in other embodiments, the "obtaining the target water temperature of the mixed water flow passage 3 and the current first water temperature of the hot water flow passage 2" in S101 specifically includes: the target water temperature of the water mixing flow channel 3, the current first water temperature of the hot water flow channel 2 and the target flow of the water mixing flow channel 3 are obtained. Further, the "first flow rate determined according to the first power and the first temperature difference" in S102 specifically includes: the first flow rate is determined according to the first power, the first temperature difference and a target flow rate, wherein the first flow rate is less than or equal to the target flow rate.

Under such water supply strategy, the target flow of mixing water runner 3 also is regarded as one of the parameters of confirming mixing water runner 3 water flow, and is concrete, with mixing water runner 3 walk water flow control at being not more than target flow to avoided surpassing the poor problem of use experience that required flow brought because of mixing water runner 3's actual flow, if: splash splashes when milk is infused. While this water supply strategy overcomes the aforementioned problems, there are drawbacks: when the special situation that the target flow is small, the difference between the first water temperature and the target flow is small, and the heating power of the first heater with fixed power is large occurs, the water temperature and flow requirements of the mixed water flow channel 3 cannot be met simultaneously only by adopting the water supply strategy. It can be seen that such a water supply strategy is not applicable to the aforementioned special cases. In contrast, in some embodiments, when it is determined that the special condition does not occur, the control strategy is adopted, and when the special condition occurs and the first water temperature is less than the target water temperature, the cold water flow channel 1 and the hot water flow channel 2 are kept communicated with the mixing flow channel 3, the mixing flow channel 3 is heated at the second power, and a second flow rate of the hot water flow channel 2 and a third flow rate of the cold water flow channel 1 are determined according to the first water temperature, the second power, the target water temperature and the target flow rate, the hot water flow channel 2 and the cold water flow channel 1 are controlled to supply water to the mixing flow channel 3 at the second flow rate and the third flow rate, respectively, so that the mixing flow channel 3 supplies water at the sum of the second flow rate and the third flow rate, wherein the sum of the second flow rate and the third flow rate is equal to or less than the target flow rate. This is further explained later.

There are various ways of obtaining the target flow rate of the mixed water flow passage 3, for example, in any of the first to ninth embodiments, the controller 10 may determine the target flow rate according to the operation information applied to the flow rate setting element 9. In other embodiments, the user sets the target flow channel on an application of the mobile terminal.

If the first electric heater 5 of the first to ninth embodiments employs an electric heater with adjustable power, the hot water flow passage 2 can be heated with the required power according to the requirement. Therefore, in other embodiments, before controlling the first electric heater 5 to heat the mixing water flow passage 3 "at the first power in S102", the water supply method further includes: a first power is determined based on the first temperature difference and the target flow rate. That is, the first power is determined based on the first temperature difference and the target flow rate, and is not arbitrarily set.

It can be understood that, in order to ensure that the water mixing channel 3 can supply water to the water terminal 22 at the target water temperature and the target flow rate is as high as possible, the first power should be higher if the first temperature difference and the target flow rate are higher; if the first temperature difference and the target flow rate are smaller, the first power should be smaller. Based on this, in some embodiments, the "first power is determined according to the first temperature difference and the target flow rate", which specifically includes:

and if the second preset product threshold is not more than the product of the first temperature difference and the target flow and is not more than the first preset product threshold, determining the first power as a third preset power value, wherein the first preset power value is more than the third preset power value and more than the second preset power value.

The product of the first temperature difference and the target flow is larger, the heating power of the water mixing flow channel 3 is larger, the product of the first temperature difference and the target flow is smaller, the heating power of the water mixing flow channel 3 is smaller, and the requirement of a user on the water temperature and the water flow is met simultaneously: the actual outlet flow is also made as close as possible to the ideal outlet flow on the premise that the actual outlet temperature is (including "substantially") the ideal outlet temperature.

In some embodiments, the first preset power value is the maximum power of the first electric heater 7, that is, when the product of the first temperature difference and the target flow rate is greater than a first preset product threshold, the first electric heater 7 is controlled to operate at full power, and the purpose of the first preset power value is to make the actual flow rate of the mixing water flow channel approach the target flow rate as far as possible on the premise of ensuring the temperature of the mixing water.

In some embodiments, the water system is further provided with a water return flow passage 4 communicated with the hot water flow passage 2 for leading out the cooling water in the hot water flow passage 2, so that the upstream uncooled hot water can be rapidly supplemented into the hot water flow passage 2, for example, in the fourth to ninth embodiments. In these embodiments, the "obtaining the target water temperature of the mixed water flow passage 3 and the current first water temperature of the hot water flow passage 2" in S101 may further include: the target water temperature of the water mixing flow channel 3, the current first water temperature of the hot water flow channel 2 and the target flow of the water mixing flow channel 3 are obtained. Not only the target water temperature of the mixed water flow passage 3 and the water temperature of the hot water flow passage 2, but also the target flow rate temperature of the mixed water flow passage 3 is obtained. Further, in S102, "if the first water temperature is less than the target water temperature, the cold water flow passage 1 is controlled to be blocked from the mixed water flow passage 3, the hot water flow passage 2 is controlled to supply water to the mixed water flow passage 3, the first electric heater 5 is controlled to heat the mixed water flow passage 3 at the first power, and the mixed water flow passage 3 is controlled to supply water at the first flow rate", preferably: if the first water temperature is less than the target water temperature and the product of the first temperature difference and the target flow is less than a third preset product threshold, the cold water flow passage 1 is controlled to be separated from the mixed water flow passage 3, the hot water flow passage 2 supplies water to the mixed water flow passage 3, the first electric heater 5 is controlled to heat the mixed water flow passage 3 at a first power, and the mixed water flow passage 3 is controlled to supply water at a first flow. That is, before the cold water flow channel 1 and the mixed water flow channel 3 are controlled to be separated and the mixed water flow channel 3 is heated, it is further required to determine whether the product of the first temperature difference and the target flow rate is smaller than a third preset product threshold, only when it is determined that the product of the first temperature difference and the target flow rate is smaller than the third preset product threshold, the cold water flow channel 1 and the mixed water flow channel 3 are controlled to be separated, so that the hot water flow channel 2 supplies water to the mixed water flow channel 3, the first electric heater 5 is controlled to heat the mixed water flow channel 3 at the first power, and the mixed water flow channel 3 is controlled to supply water at the first flow rate. Otherwise, even if the first water temperature is less than the target water temperature, if the product of the first temperature difference and the target flow is larger than a third preset product threshold, the cold water flow channel 1 and the hot water flow channel 2 are both controlled to be separated from the mixed water flow channel 3, and the hot water flow channel 2 is controlled to send water to the water return flow channel 4.

It will be appreciated that the greater the product of the first temperature difference and the target flow rate, the greater the heating power that needs to be consumed to heat and maintain the water temperature in the mixing flow channel 3 at the target water temperature and to supply water to the water usage terminal 22 at a flow rate as close as possible to the target flow rate. The power of the first electric heater 5 is limited or even fixed, and when the product of the first temperature difference and the target flow is greater than a third preset product threshold, if it is required to maintain the water temperature of the water mixing flow channel 3 at the target water temperature, the flow of the water mixing flow channel 3 is inevitably far lower than the target flow, which is difficult to meet the requirement of the user on the water flow. Thus, in an embodiment of the previous paragraph, the water supply method may further comprise: and if the first water temperature is less than the target water temperature and the product of the first temperature difference and the target flow is greater than a third preset product threshold, controlling the cold water flow passage 1 and the hot water flow passage 2 to be separated from the mixed water flow passage 3, and controlling the hot water flow passage 2 to send water to the water return flow passage 4. Therefore, the cooling water with lost temperature in the hot water flow passage 2 is led out quickly, the hot water without lost temperature at the upstream is supplemented to the hot water flow passage 2, particularly the water outlet end of the hot water flow passage 2 quickly, the water temperature of the hot water flow passage 2 is increased quickly in a short time, and the water outlet flow of the water terminal 22 is close to the ideal flow as far as possible on the premise that the water outlet temperature of the water terminal 22 is close to the ideal temperature.

The smaller the product of the first temperature difference and the target flow rate, the less heating power needs to be consumed to heat and maintain the water temperature of the mixing water flow passage 3 at the target water temperature and supply water at a flow rate as close to the target flow rate as possible. If the first water temperature is less than the target water temperature, and the product of the first temperature difference and the target flow is less than the third preset product threshold, it is indicated that the requirements of the water temperature and the water flow can be at least basically met without consuming a large heating power (for example, the upper limit heating power which can be provided by the first electric heater 5), at this time, water return is not needed, the cold water flow channel 1 is controlled to be separated from the mixed water flow channel 3, only the hot water flow channel 2 is allowed to send water to the mixed water flow channel 3, the first electric heater 5 is controlled to heat the mixed water flow channel 3 with the first power, and the hot water flow channel 2 is controlled to supply water to the mixed water flow channel 3 with the first flow.

In other embodiments, the water supply method further comprises: and obtaining the target flow of the mixed water flow passage 3. And in S102, "if the first water temperature is less than the target water temperature, the cold water flow passage 1 is controlled to be blocked from the mixed water flow passage 3, so that the hot water flow passage 1 supplies water to the mixed water flow passage 3, the first electric heater 5 is controlled to heat the mixed water flow passage 3 at the first power, and the mixed water flow passage 3 is controlled to supply water at the first flow rate", which is further optimized to include:

if the first water temperature is less than the target water temperature, and

the cold water flow passage 1 is controlled to be separated from the mixed water flow passage 3, so that the hot water flow passage 1 supplies water to the mixed water flow passage 3, and the maximum power of the first electric heater 5 is determinedThe first electric heater 5 is controlled to heat the mixed water flow passage 3 with the determined first power, and the mixed water flow passage 3 is controlled to supply water with the first flow rate, wherein K is a compensation coefficient, P_maxIs the maximum power of the first electric heater, T₀Is the target water temperature, S₀Is a target flow rate, T₁Is the first water temperature.

It is understood that when the

When it is determined that the first electric heater 5 can supply the maximum power P even when the maximum power P is not supplied, the following description is given_maxThe heating water mixing flow passage 3 can maintain the water temperature of the water mixing flow passage 3 at the target water temperature T₀In the case of (3), the flow path of the mixed water flow path 3 cannot reach the target flow rate S₀. Therefore, at this time, the cold water flow passage 1 should be separated from the mixed water flow passage 2, so that the cold water flow passage 1 with the lower water temperature does not supply water to the mixed water flow passage 3, and the first electric heater 5 is controlled to supply the maximum power P thereof_maxTo heat the hot water flow passage 2 with relatively high water temperature, so that the flow of the mixed water flow passage 3 is closer to the target flow S₀。

In another embodiment, the heating power of the first electric heater 5 is adjustable and can be adjusted steplessly between the minimum power and the maximum power that it can provide, and "if the first water temperature is less than the target water temperature, the cold water flow passage 1 is controlled to be isolated from the mixing flow passage 3, so that the hot water flow passage 1 supplies water to the mixing flow passage 3, the first electric heater 5 is controlled to heat the mixing flow passage 3 at the first power, and the mixing flow passage 3 is controlled to supply water at the first flow rate" in S102, which is further optimized to include:

if the first water temperature is less than the target water temperature, and

and is

The cold water flow passage 1 is controlled to be separated from the mixed water flow passage 3, so that the hot water flow passage 2 supplies water to the mixed water flow passage 3, and the K.S is performed₀·(T₀-T₁) Determining a first power, controlling a first electrical heatingThe device 5 uses the first power (i.e. K.S) determined in the foregoing₀·(T₀-T₁) Heating the mixing channel 3 and controlling the mixing channel 3 to supply water at a first flow rate, wherein P_minIs the minimum power of the first electric heater.

It is understood that when the

And is

When the first electric heater 5 is used, it is indicated that the first electric heater 5 is capable of heating the water temperature of the mixed water flow passage 3 to the target water temperature T₀And let the water mixing flow passage 3 at the target flow S₀Supplying water, and if the first electric heater 5 is at the minimum power P_minThe water mixing flow channel 3 does not cause the water temperature to rise too high. Therefore, the cold water flow passage 1 and the mixed water flow passage 3 can be separated at this time, and the first electric heater 5 is controlled to have the power value of K.S₀·(T₀-T₁) The heating power s heats the water mixing flow passage 3, so that the water temperature of the water mixing flow passage 3 is the target water temperature T₀The flow rate is a target flow rate S₀。

In another embodiment, the heating power of the first electric heater 5, although adjustable, cannot be continuously and steplessly adjusted, but has a step-wise and discontinuous adjustment, and the water supply method further comprises:

acquiring a target flow of the water mixing flow channel 3 and a current second water temperature of the cold water flow channel 1;

if the first water temperature is less than the target water temperature, and

determining a second power of the first electric heater, determining a second flow rate of the hot water flow passage 2 and a third flow rate of the cold water flow passage 1 according to the second power, the target water temperature, the target flow rate, the first water temperature and the second water temperature, controlling the first electric heater to heat the mixed water flow passage 3 at the determined second power, controlling the hot water flow passage 2 to supply water to the mixed water flow passage 3 at the determined second flow rate, and controlling the cold water flow passage to supply water to the mixed water flow passage 3 at the determined third flow rate；

Wherein the aforementioned "determining the second power of the first electric heater" includes:

determining the second power as P_max≥P₂≥K·S₀·(T₀-T₁)；

Wherein the determining the second flow rate of the hot water flow path and the third flow rate of the cold water flow path according to the first power, the target water temperature, the target flow rate, the first water temperature, and the second water temperature includes:

the second flow rate and the third flow rate are calculated by the following relation,

k is a compensation factor, P₂At a second power, T₀Is the target water temperature, S₀Is a target flow rate, T₁At a first water temperature, T₂At the second water temperature, S₂Is the second flow rate, S₃Is the third flow rate.

It is understood that when the

When, say, the first electric heater 5 is at the maximum power P_maxWorking and keeping the flow of the mixed water flow passage 3 not more than the target flow S₀When the temperature of the hot water flow passage 2 is higher than the target water temperature T₀. It can be seen that the first electric heater 5 has the ability to heat the water temperature of the hot water flow passage 2 to the target water temperature T₀And the hot water flow passage 2 is enabled to be equal to or exceed the target flow S₀The flow rate of the water supply pipe supplies water to the mixed water flow passage 3. If the system directly controls the first electric heater 5 to have the maximum power P_maxWorking, opening the cold water flow passage 1 and supplying water to the mixed water flow passage 3, if the maximum power P is reached_maxToo large and the target flow rate S₀Smaller, will increase S₂And S₃The possibility of failing to take value. That is, if the first electric heater 5 is simply directly controlled to have the maximum power P_maxThe probability that the second flow and the third flow can not be determined is high, and the method is suitable for useThe scene is limited. In this regard, the "determining the second power of the first electric heater" described above is further optimized to include:

s100, making i equal to 1;

s200, judging

Whether or not S is greater than or equal to₀Wherein i is 1, 2, 3 … n, P_i ⁰For the ith preset power of the preset first electric heater 5 (the preset power corresponds to the gear power of the first electric heater, n selectable gears in total), P₁ ⁰＝P_min，P_n ⁰＝P_maxAnd the ith preset power is less than the ith +1 preset power;

s300, if yes, judging

Greater than or equal to S₀Then P will be_i ⁰Determining as a second power;

if it is determined that

Less than S₀Then, the following step S400 is executed;

s400, let i equal i +1, and repeat steps S200 and S300.

It can be understood that through the above control strategy, the system can automatically select the gear power which is as small as possible and can meet the target water temperature and target flow requirement of the water mixing flow channel 3 to add the water mixing flow channel 3, thereby reducing S₂And S₃The possibility of unable value taking enlarges the application scene.

It is to be understood that, in the step S300, it is determined that

Is equal to S₀The current P is_i ⁰After determining the second power, the calculated third flow should be zero.

In some embodiments, the water system is not only provided with the return water flow passage 4, but also provided with a hot water tank communicated with the hot water flow passage 2 to provide a hot water source to the hot water flow passage 2, as described in the fourth embodiment. In these embodiments, the "obtaining the target water temperature of the mixed water flow passage 3 and the current first water temperature of the hot water flow passage 2" in S101 may further include: the target water temperature of the water mixing flow channel 3, the current first water temperature of the hot water flow channel 2, the target flow of the water mixing flow channel 3 and the fourth water temperature of the hot water tank are obtained. That is, in S101, not only the target water temperature of the mixed water flow passage 3 and the current first water temperature of the hot water flow passage 2 but also the target flow rate of the mixed water flow passage 3 and the fourth water temperature of the hot water tank are obtained. Further, in S102, "if the first water temperature is less than the target water temperature, and the product of the first temperature difference and the target flow rate is greater than a third preset product threshold, the cold water flow channel 1 and the hot water flow channel 2 are both controlled to be separated from the mixed water flow channel 3, and the hot water flow channel 2 is controlled to send water to the return water flow channel 4", preferably: and if the first water temperature is less than the target water temperature, the product of the first temperature difference and the target flow is greater than a third preset product threshold, and the first water temperature is less than a fourth water temperature, controlling the cold water flow channel 1 and the hot water flow channel 2 to be separated from the water mixing flow channel 3, and controlling the hot water flow channel 2 to send water to the water return flow channel 4. That is, before the cold water flow channel 1 and the hot water flow channel 2 are both controlled to be isolated from the water mixing flow channel 3 and the hot water flow channel 2 is controlled to supply water to the water returning flow channel 4, it is necessary to determine whether the first water temperature is lower than the fourth water temperature, and only when it is determined that the first water temperature is lower than the fourth water temperature, the subsequent actions are performed, i.e., the cold water flow channel 1 and the hot water flow channel 2 are both controlled to be isolated from the water mixing flow channel 3 and the hot water flow channel 2 is controlled to supply water to the water returning flow channel 4.

Only when the fourth water temperature of the hot water tank is determined to be higher than the current first water temperature of the current hot water flow channel 2, the water temperature of the hot water flow channel 2 can be quickly raised in a water return mode. Therefore, the water supply method in the embodiment of the previous paragraph avoids the possibility that the water temperature of the hot water channel 2 does not rise or fall after returning water. And when the first water temperature is determined to be less than the fourth water temperature, but the target water temperature is not determined to be less than or equal to the fourth water temperature, the hot water channel 2 is controlled to send water to the water return channel 4, and the purpose is to quickly raise the water temperature of the hot water channel 2, so that the difference between the water temperature of the hot water channel and the target water temperature is reduced, and the hot water channel can be heated once the water system knows that the first temperature difference between the water temperature and the target water temperature is reduced to be less than a third preset product threshold value. Therefore, the method does not require that the water temperature of the hot water channel is raised to the target water temperature or above by a water return mode, and overcomes the defect that the water return action is not executed when the water temperature of the hot water tank is obviously higher than the current water temperature of the hot water channel but lower than the target water temperature.

In the description of the present specification and claims, "backwater" should be understood as: it includes any reasonable situation of leading the water of the hot water flow passage 2 to other than the mixed water flow passage 3, such as leading the water in the hot water flow passage 2 to a drain, and the "backwater" is not limited to the hot water supply source that leads the water of the hot water flow passage 2 back to the hot water flow passage 2, such as the hot water tank described in the fourth embodiment.

In other embodiments, the "if the first water temperature is less than the target water temperature, the cold water flow passage 1 is controlled to be blocked from the mixing water flow passage 3, the hot water flow passage 2 is controlled to supply water to the mixing water flow passage 3, the first electric heater 5 is controlled to heat the mixing water flow passage 3 at the first power, and the hot water flow passage 2 is controlled to supply water at the first flow rate" in S102 includes the following strategies: if the first water temperature is less than the target water temperature and the first water temperature is greater than or equal to the fourth water temperature, the cold water flow passage 1 is controlled to be separated from the mixed water flow passage 3, the hot water flow passage 2 supplies water to the mixed water flow passage 3, the first electric heater 5 is controlled to heat the mixed water flow passage 3 at a first power, and the hot water flow passage 2 is controlled to supply water at a first flow rate.

It can be understood that if the first water temperature is greater than or equal to the fourth water temperature, it means that no water return is necessary, and therefore even if the product of the first temperature difference and the target flow rate is greater than the third preset product threshold, water is supplied in a relatively reasonable manner by heating the water mixing flow channel 3, and water with a small flow rate and a water temperature meeting the requirement is obtained.

The above is merely an exemplary embodiment of the present application and is not intended to limit the scope of the present application, which is defined by the appended claims.

Claims

1. A water supply method is applied to a water using system, and the water using system comprises the following steps:

a cold water flow passage is arranged on the water tank,

a hot water flow passage is arranged on the upper portion of the water tank,

The first electric heater is connected to the water mixing flow passage;

characterized in that the water supply method comprises:

2. The water supply method according to claim 1, further comprising:

acquiring a current second water temperature of the cold water flow channel;

3. The water supply method according to claim 1, wherein the first flow rate is determined according to the first power and a first temperature difference, comprising:

4. The water supply method according to claim 1, further comprising: acquiring the target flow of the water mixing flow channel;

5. The water supply method according to claim 4, wherein the first electric heater is adjustable in power, and the first power is determined based on the first temperature difference and the target flow rate.

6. The water supply method according to claim 5, wherein the first power is determined according to the first temperature difference and the target flow rate, and comprises:

7. Water supply method according to claim 6, characterized in that said first preset power value is the maximum power of said first electric heater.

8. The water supply method according to claim 1, wherein the water using system further comprises a return water flow passage communicating with the hot water flow passage;

the water supply method further includes:

acquiring the target flow of the water mixing flow channel;

9. The water supply method according to claim 8, further comprising:

10. The water supply method according to claim 9, wherein the water using system further comprises a hot water tank communicating with the hot water flow passage for supplying water to the hot water flow passage;

the water supply method further includes:

acquiring the current fourth water temperature of the hot water tank;

11. The water supply method according to claim 10, wherein if the first water temperature is less than the target water temperature, controlling the cold water flow passage to be blocked from the mixing water flow passage, allowing the hot water flow passage to supply water to the mixing water flow passage, controlling the first electric heater to heat the mixing water flow passage at a first power, and controlling the mixing water flow passage to supply water at a first flow rate, further comprises:

12. The water supply method according to claim 1, further comprising:

acquiring the target flow of the water mixing flow channel;

if the first water temperature is less than the target water temperature, and

13. The water supply method according to claim 12, wherein if the first water temperature is less than the target water temperature, the controlling the cold water flow passage to be blocked from the mixing water flow passage to supply water to the mixing water flow passage, the controlling the first electric heater to heat the mixing water flow passage at a first power, and the controlling the mixing water flow passage to supply water at a first flow rate further comprises:

if the first water temperature is less than the target water temperature, and

and is

The cold water flow passage and the mixed water flow passage are controlled to be separated, the hot water flow passage supplies water to the mixed water flow passage, and the K.S is used₀·(T₀-T₁) Determining the first power, controlling the first electric heater to heat the water mixing flow passage with the first power, and controlling the water mixing flow passage to supply water with a first flow rate, wherein P is_minIs the firstA minimum power of an electric heater.

14. The water supply method according to claim 12, further comprising:

acquiring a current second water temperature of the cold water flow channel;

if the first water temperature is less than the target water temperature, and

wherein the determining a second power of the first electric heater comprises:

determining the second power as P_max≥P₂≥K·S₀·(T₀-T₁)；

by means of a relational expression

Calculating the second flow rate and the third flow rate;

P₂is the second power, T₂Is the second water temperature, S₂For the second flow, S₃Is the third flow rate.

15. The water supply method of claim 14, wherein said determining a second power of the first electric heater comprises:

s100, making i equal to 1;

s200, judging

s300, if yes, judging

if it is determined that

Less than S₀Then, the following step S400 is executed;

s400, let i equal to i +1, and repeat the above steps S200 and S300.

16. A water use system comprising:

a cold water flow passage is arranged on the water tank,

a hot water flow passage, and

characterized in that, the water system still includes:

17. The water usage system of claim 16 further comprising:

18. The water usage system of claim 17 further comprising:

wherein, the return water valve with controller communication connection.

19. The water usage system of claim 18 further comprising:

20. The water system as claimed in claim 16, further comprising a housing, wherein the cold water flow passage, the hot water flow passage, the mixed water flow passage, the mixing valve, the first electric heater and the controller are all received and fixed in the housing, and the cold water flow passage and the hot water flow passage are both provided with water inlet connectors extending out of the housing, and the mixed water flow passage is provided with water outlet connectors extending out of the housing.