Self-temperature regulating faucet and control method thereof, and water supply system

Abstract

The present application relates to a self-adjusting temperature faucet and a control method and a water supply system thereof. The self-adjusting temperature faucet includes a faucet body, a flow valve, a water adjustment switch, a water control valve, a motor, a water temperature sensor, a temperature setting module, and a processor. When in use, the target temperature is set by the temperature setting module, the processor receives the signal of the water temperature sensor, the water control valve switches between three working states of return water, water flow, and water cut-off under the control of the processor, the moving valve body of the water control valve rotates around the axis of the return water hole, and the motor drives the water control valve to rotate around the axis of the return water hole according to the set temperature to change the ratio of the cold water and hot water flow to the flow valve, thereby realizing automatic adjustment of the temperature of the mixed water flowing to the flow valve and precise control of the temperature.

Description

Technical Field

[0001] The present application relates to a self-temperature regulating faucet and a control method thereof, and a water supply system equipped with the self-temperature regulating faucet. Background Art

[0002] Faucet is a popular name for water valve, which is used to control the size of water flow and has the effect of saving water. The replacement speed of faucets is very fast, from the old cast iron process to the electroplated knob type, and then to the stainless steel single temperature single control faucet, stainless steel double temperature double control faucet, and kitchen semi-automatic faucet. Now, more and more consumers will consider the material, function, shape and other aspects when purchasing faucets.

[0003] Traditional hot water faucets with hot water and cold water ports cannot accurately set the water temperature, and must rely on the user's past experience to adjust the angle of the water switch to obtain a rough temperature of the water flow.

[0004] In addition, when a traditional hot water faucet is turned on, the first thing that flows out is always the cold water in the pipe. The hot water will slowly flow out only after the cold water is completely drained. This not only wastes water resources, but also wastes the user's time and reduces the user experience. The reason for the above problem is that there is always a pipe between the hot water source and the faucet. In this pipe, the hot water cannot avoid releasing heat and cooling down.

[0005] When hot water is needed, people have to drain all the cold water in the pipe through the faucet first, until the hot water from the upstream hot water source flows into the faucet. The water in the pipe is at least 1-2L, and at most 4-5L. With the popularization of wall-mounted boilers, electric water heaters, and solar water heaters, the waste of water resources caused by this phenomenon cannot be underestimated.

[0006] When the applicant submitted this patent application, he also submitted another patent application on the same day, which solved the above problem by setting a water control valve. Compared with the general faucet that only has two working states of water cut-off and water flow, the faucet in the aforementioned "another patent application" realizes three working states of water cut-off, water return and water flow through the water control valve; the water control valve is used in conjunction with a manually adjustable water mixing valve. When in use, the user controls the water mixing valve by manually driving the water adjustment switch. The water control valve automatically switches between the three working states under the control of the motor according to the user's operation information collected by the faucet. This application effectively reduces the waste of water resources, but the invention of this application requires the user to manually adjust the water temperature when in use, and the adjusted temperature value is not accurate.

[0007] This application arises from this. Summary of the invention

[0008] The technical problem to be solved by the present application is: to propose a self-temperature regulating faucet and a control method thereof, and a water supply system equipped with such a self-temperature regulating faucet, wherein the faucet can not only return the cold water in the hot water pipe to the hot water tank to ensure that the hot water flowing to the faucet outlet has a sufficiently high temperature value, but also can accurately set the water temperature at the outlet.

[0009] The technical solution of this application is:

[0010] A self-adjusting water tap, comprising:

[0011] The faucet body;

[0012] A water flow channel provided in the faucet body, the water flow channel comprising: a cold water flow channel, a hot water flow channel, and a confluence water channel communicating with the water outlet end of the cold water flow channel and the water outlet end of the hot water flow channel;

[0013] A cold water interface provided at the water inlet end of the cold water flow channel,

[0014] A hot water interface provided at the water inlet end of the hot water flow channel,

[0015] A water outlet is provided at the water outlet end of the confluence waterway,

[0016] a flow valve disposed on the confluence waterway, and

[0017] A water regulating switch connected to the flow valve;

[0018] The faucet also includes:

[0019] A switch sensor connected to the water regulating switch to detect the working state of the water regulating switch;

[0020] A water return interface for connecting a water return pipe;

[0021] A water control valve arranged on the water flow channel, the water control valve comprises a fixed valve body and a movable valve body arranged close to the downstream side of the fixed valve body and capable of rotating around a rotation axis, the fixed valve body is provided with: a first cold water hole located on the cold water flow channel, a first hot water hole located on the hot water flow channel, and a return water hole communicated with the return water interface, and the hole axis coincides with the rotation axis;

[0022] The movable valve body is provided with a second cold water hole and a second hot water hole, and a side of the movable valve body close to the fixed valve body is provided with a return water drainage groove which is recessed inwards, separated from the second cold water hole and the second hot water hole, and communicated with the return water hole;

[0023] The first cold water hole, the second cold water hole, the first hot water hole and the second hot water hole are all arc-shaped long strip holes extending around the rotation axis; the water return drainage groove is a strip groove extending along the radial direction of the water return hole, and has a first end and a second end at both ends in the length direction, the first end of the water return drainage groove is located on the hole axis of the water return hole, the distance between the first cold water hole and the water return hole = the distance between the second cold water hole and the water return hole > the distance between the second end of the water return drainage groove and the water return hole ≥ the distance between the first hot water hole and the water return hole = the distance between the second hot water hole and the water return hole;

[0024] A first motor connected to the movable valve body to drive the movable valve body to rotate around the rotation axis;

[0025] a first water temperature sensor disposed on the hot water flow channel between the hot water interface and the first hot water hole;

[0026] a second water temperature sensor disposed on the confluence waterway;

[0027] a temperature setting module; and

[0028] A processor is respectively connected to the first motor, the switch sensor, the first water temperature sensor, the second water temperature sensor and the temperature setting module circuit.

[0029] The self-adjusting water tap of the present application further includes the following preferred solutions based on the above technical solutions:

[0030] The distance between the first cold water hole and the first hot water hole in the circumferential direction around the axis of the water return hole is ≠ the distance between the second cold water hole and the second hot water hole in the circumferential direction around the axis of the water return hole.

[0031] The faucet also includes a second motor connected to the flow valve to drive the flow valve to be in different working states, and the second motor is connected to the processor circuit.

[0032] The water regulating switch is a rotary water regulating switch;

[0033] The switch sensor comprises:

[0034] a contact switch physically matched with the water adjustment switch and connected to the processor circuit to detect the opening and closing of the water adjustment switch, and

[0035] A potentiometer physically matched with the water adjustment switch and connected to the processor circuit to detect the rotation angle of the water adjustment switch.

[0036] The faucet further includes a temperature display module connected to the processor circuit to display the sensed temperature of the second water temperature sensor.

[0037] The temperature display module and the temperature setting module are integrated on a touch display fixed to the faucet body.

[0038] A water supply system, comprising:

[0039] A faucet with hot and cold water connections.

[0040] a water pipe connected to the cold water interface, and

[0041] A hot water tank connected to the hot water interface via a hot water supply pipe;

[0042] The faucet is any of the above-mentioned self-temperature regulating faucets, and the hot water tank is also connected to the return water interface through a return water pipe.

[0043] The return pipe or the hot water supply pipe is provided with a water pump connected to the water temperature sensor and the switch sensor circuit.

[0044] The water return pipe or the hot water supply pipe is provided with an automatic booster pump.

[0045] A method for controlling a self-adjusting thermostatic faucet as described above, wherein the switch sensor transmits a signal to the processor indicating that the water regulating switch is in an on state:

[0046] If the processor receives a first sensed water temperature transmitted by the first water temperature sensor that is lower than a set temperature, the processor sends a control signal to the first motor, so that the first motor drives the movable valve body to rotate to the second position, at which time the return water diversion groove connects the first hot water hole with the return water hole, and the movable valve body blocks the first cold water hole and the first hot water hole at the same time;

[0047] If the first sensed water temperature transmitted by the first water temperature sensor received by the processor reaches the set temperature, and the first sensed water temperature is greater than the target temperature transmitted by the temperature setting module received by the processor and is greater than the second sensed water temperature transmitted by the second water temperature sensor received by the processor, the processor sends a control signal to the first motor to cause the first motor to drive the movable valve body to rotate to the third position. At this time, the return water diversion groove is separated from the first hot water hole and the first cold water hole, the second cold water hole is connected to the first cold water hole, and the second hot water hole is connected to the first hot water hole, and the ratio of the connection area of ​​the second hot water hole and the first hot water hole to the connection area of ​​the second cold water hole and the first cold water hole is positively correlated with the difference between the target temperature and the second sensed temperature.

[0048] This application can achieve the following beneficial effects:

[0049] 1. The water control valve is switched between three working states of water return, water flow and water cut-off under the drive of the motor. The first hot water hole, the second hot water hole, the second cold water hole and the second hot water hole are all arc-shaped long holes extending around the rotation axis. During the rotation of the moving valve body of the water control valve around the axis of the return water hole, the conduction area of ​​the first cold water hole and the second cold water hole will not always be equal to the conduction area of ​​the first hot water hole and the second hot water hole. The ratio of the cold water and hot water flow rates flowing to the flow valve is related to the ratio of the aforementioned conduction areas. When the water control valve is in the water flow state, the processor receives the temperature signal and drives the water control valve to rotate around the axis of the return water hole through the motor according to the set temperature to change the ratio of the aforementioned areas, thereby realizing automatic adjustment of the temperature of the mixed water flowing to the flow valve.

[0050] 2. The present application realizes precise temperature control by combining with the temperature setting module, and no longer needs to rely on the user's experience to obtain the rough temperature of the water flow.

[0051] 3. By setting the hole distance between the first cold water hole and the return water hole = the hole distance between the second cold water hole and the return water hole ≠ the hole distance between the first hot water hole and the return water hole = the hole distance between the second hot water hole and the return water hole, no matter how the movable valve body rotates, the first cold water hole and the second hot water hole, as well as the first hot water hole and the second cold water hole will not be connected, thereby preventing the cold water carried by the first cold water hole and the hot water carried by the first hot water hole from being connected to the second hot water hole and the second cold water hole respectively, causing the problem of cold and hot water cross-flow, thereby achieving dedicated use of dedicated holes.

[0052] 4. The distance between the first cold water hole and the return water hole is greater than the distance between the second end of the return water drainage groove and the return water hole, and greater than the distance between the first hot water hole and the return water hole. In this way, it can be ensured that after the movable valve body rotates to the corresponding position, the return water drainage groove can communicate with the first hot water hole, and then connect the return water hole with the first hot water hole. In addition, it can be avoided that the return water drainage groove connects the return water hole with the first cold water hole during the rotation of the movable valve body, and the cold water in the cold water flow channel enters the return water flow channel, which causes the cold water to enter the heat source.

[0053] 5. A water temperature sensor is arranged in the hot water flow channel upstream of the faucet water control valve, and the water temperature sensor, the motor driving the valve body, and the water adjustment switch of the faucet are connected to each other, so that each time the faucet is turned on, the water control valve can be automatically adjusted to the water return or water flow state according to the water temperature in the hot water flow channel.

[0054] 6. The fixed valve body is provided with an inwardly concave circular groove, in which the movable valve body is closely embedded. The circular groove on the fixed valve body defines the rotation axis of the movable valve body, thereby preventing the movable valve body from radially deviating during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] 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. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0056] Figure 1 It is a schematic diagram of the three-dimensional structure of the faucet in Example 1 of the present application.

[0057] Figure 2 It is a longitudinal cross-sectional view of the faucet in Example 1 of the present application.

[0058] Figure 3 It is a longitudinal cross-sectional view of the faucet in the first embodiment of the present application in another direction.

[0059] Figure 4 This is an exploded view of the faucet in Example 1 of the present application.

[0060] Figure 5 It is a schematic diagram of the exploded structure of the water control valve in Example 1 of the present application.

[0061] Figure 6 It is a schematic diagram of the exploded structure of the water control valve in Example 1 of the present application from another perspective.

[0062] Figure 7 It is a three-dimensional cross-sectional view of the water control valve in the first embodiment of the present application when it is in the water return state.

[0063] Figure 8 It is a plan cross-sectional view of the water control valve in the first embodiment of the present application when it is in the water return state.

[0064] Fig. 9 It is an axial side view of the water control valve in the first embodiment of the present application when the movable valve body is in the first position.

[0065] Fig.10 It is an axial side view of the water control valve in the first embodiment of the present application when the movable valve body is in the second position.

[0066] Fig.11 It is an axial side view of the central control water valve in the first embodiment of the present application when the first cold water hole and the second cold water hole are connected in a small area.

[0067] Fig.12 It is an axial side view of the central control water valve in the first embodiment of the present application when the first cold water hole and the second cold water hole are fully connected.

[0068] Fig.13 It is an axial side view of the central control water valve in the first embodiment of the present application when the conduction area between the first hot water hole and the second hot water hole is larger than the conduction area between the first cold water hole and the second cold water hole.

[0069] Fig.14 It is an axial side view of the central control water valve in the first embodiment of the present application when the conduction area between the first hot water hole and the second hot water hole is equal to the conduction area between the first cold water hole and the second cold water hole.

[0070] Fig.15 It is an axial side view of the central control water valve in the first embodiment of the present application when the conduction area between the first cold water hole and the second cold water hole is smaller than the conduction area between the first hot water hole and the second hot water hole.

[0071] Fig.16 It is an axial side view of the central water control valve in the first embodiment of the present application when the first hot water hole and the second hot water hole are fully connected.

[0072] Fig.17 It is a schematic diagram of the three-dimensional structure of the outer shell of the diverter in Example 1 of the present application.

[0073] Fig.18 It is a three-dimensional cross-sectional view of the outer shell of the diverter in Example 1 of the present application.

[0074] Fig.19 This is the second stereoscopic cross-sectional view of the drain device housing in Example 1 of the present application.

[0075] Fig. 20 This is the third stereoscopic cross-sectional view of the drain device housing in Example 1 of the present application.

[0076] Fig.21 This is the fourth stereoscopic cross-sectional view of the drain device housing in Example 1 of the present application.

[0077] Fig. 22 It is a schematic diagram of the three-dimensional structure of the drain core in Example 1 of the present application.

[0078] Fig.23 It is a three-dimensional cross-sectional view of the drain core in Example 1 of the present application.

[0079] Fig.24 It is a structural schematic diagram of the clutch at the connection between the motor and the diverter core in the second embodiment of the present application in a tightened state.

[0080] Fig.25 yes Fig.24 Enlarged view of the clutch.

[0081] Fig.26 It is a structural schematic diagram of the clutch at the connection between the motor and the diverter core in the second embodiment of the present application in a loosened state.

[0082] Fig. 27 yes Fig.26 Enlarged view of the clutch.

[0083] Fig.28 It is a schematic diagram of the three-dimensional structure of the faucet in Example 3 of the present application.

[0084] Fig.29 This is an exploded view of the faucet in Example 3 of the present application.

[0085] Fig.30 This is a partial structural appearance diagram of the faucet in Example 3 of the present application when the cold water bypass and the hot water bypass are respectively in a disconnected state.

[0086] Fig.31 This is a partial structural appearance diagram of the faucet in Example 3 of the present application when the cold water bypass and the hot water bypass are respectively in the connected state.

[0087] Fig.32 It is a schematic diagram of the three-dimensional structure of the fixed valve body in the third embodiment of the present application when viewed from above.

[0088] Fig.33 yes Fig.30 Schematic diagram of the cross-sectional structure.

[0089] Fig.34 yes Fig.31 Schematic diagram of the cross-sectional structure.

[0090] Fig.35 It is a schematic diagram of the appearance structure of the diverter shell in Example 3 of the present application.

[0091] Fig.36 It is a schematic diagram of the cross-sectional structure of the diverter shell in Example 3 of the present application.

[0092] Fig.37 It is another cross-sectional structural schematic diagram of the diverter shell in Example 3 of the present application.

[0093] Fig.38 It is a schematic diagram of the structure of the valve sleeve in Example 3 of the present application.

[0094] Fig.39 It is a schematic diagram of the structure of the movable valve plate in the third embodiment of the present application.

[0095] Fig.40 It is a structural schematic diagram of the water supply system in Example 4 of the present application.

[0096] Figures 10 to 16 The filled areas in represent water flow.

[0097] Wherein: m-rotation axis, 100-faucet, 1-cold water interface, 2-hot water interface, 3-return water interface, 4-water outlet, 6-water adjustment switch, 7-water outlet diverter, 8-water control valve, 9-motor, 10-sensor mounting seat, 11-water temperature sensor, 12-switch sensor, 13-power cord, 14-rotating hand wheel, 15-touch display, 16-processor, 17-backup battery, 18-flow valve, 19-hot water tank, 20-tap pipe, 21-hot water supply pipe, 22-return water pipe, 23-water pump, 24-clutch, 25-movable valve plate, 26-valve sleeve, 27-check valve;

[0098] 701-flow guide housing, 702-flow guide core, 701a-cylindrical inner cavity, 701b-downstream cold water guide hole, 701c-downstream hot water guide hole, 701d-fixed valve body receiving cavity, 701e-cold water bypass hole, 701f-hot water bypass hole, 701g-notch, 702a-annular groove, 702b-upstream cold water guide hole, 702c-upstream hot water guide hole, 702d-rubber sealing ring;

[0099] 801-fixed valve body, 802-moving valve body, 801a-first cold water hole, 801b-first hot water hole, 801c-return water hole, 801d-circular groove, 801e-cold water groove, 801f-hot water groove, 802a-second cold water hole, 802b-second hot water hole, 802c-return water drainage groove;

[0100] 24a-clutch actuating portion;

[0101] 25a-third cold water hole, 25b-third hot water hole, 25c-actuating handle;

[0102] 26a-the fourth cold water hole, 26b-the fourth hot water hole. DETAILED DESCRIPTION

[0103] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0104] Unless otherwise defined, the technical terms or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which this application belongs. The words "one" or "an" and the like used in the patent application specification and claims of this application do not indicate a quantity limitation, but indicate the existence of at least one.

[0105] In the description of the specification and claims of this application, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediary medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0106] In the description of the specification and claims of this application, the terms "upper", "lower", "horizontal", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present application.

[0107] In the description of the specification and claims of this application, the term "circuit connection" includes both wired connection and wireless connection.

[0108] Now, embodiments of the present application are described with reference to the accompanying drawings.

[0109] Embodiment 1: Faucet

[0110] Figures 1 to 23Another faucet is shown, which includes a faucet body of a traditional faucet, and a water flow channel is arranged in the faucet body, and the water flow channel includes: a cold water flow channel for cold water, a hot water flow channel for hot water, and a confluence water channel connected to the water outlet end of the cold water flow channel and the water outlet end of the hot water flow channel. In actual application, the cold water of the cold water flow channel and the hot water of the hot water flow channel are merged in the confluence water channel. The bottom of the faucet body is provided with a cold water interface 1 connected to the cold water flow channel and a hot water interface 2 connected to the hot water flow channel, and the cold water interface 1 is arranged at the water inlet end of the cold water flow channel, and the hot water interface 2 is arranged at the water inlet end of the hot water flow channel. In actual application, the cold water interface 1 is connected to an external cold water supply pipe, such as a tap water pipe, to supply cold water to the cold water flow channel. The hot water interface 2 is connected to an external hot water supply pipe to supply hot water to the hot water flow channel. The upper part of the faucet body is provided with a water outlet 4 located at the water outlet end of the entire aforementioned confluence water channel, which is used to lead out the water flow in the confluence water channel for use. It can be seen that the cold water of the aforementioned cold water channel and the hot water of the hot water channel merge upstream of the water outlet 4, and the water outlet 4 is used to lead out the cold water and hot water merged in the confluence water channel for use, that is, to lead out the water flow in the cold water channel and the hot water channel for use. The flow valve 18 for adjusting the water flow is provided on the aforementioned confluence water channel. The water adjustment switch 6 arranged on the top of the faucet is connected to the aforementioned flow valve 18, so that the working state of the flow valve 18 can be controlled by means of the water adjustment switch 6.

[0111] The water adjustment switch 6 can be physically connected to the aforementioned flow valve 18, so that the flow valve 18 can be adjusted to various working states by means of the mechanical force applied by the water adjustment switch 6. However, this embodiment does not adopt this method. In this embodiment, a motor 9 connected to the flow valve 18 is configured in the faucet body, and the flow valve 18 is driven by the motor 9 to move, thereby realizing the adjustment of the water flow size at the water outlet 4. The motor 9 is a stepping motor.

[0112] In this embodiment, the cold water flow channel and the hot water flow channel, which are components of the faucet water flow channel, have their water outlets connected to the aforementioned flow valve 18. The flow valve 18 has two water inlet holes and a water outlet hole connected to the two water inlet holes. The water outlets of the cold water flow channel and the hot water flow channel are connected to the aforementioned two water inlet holes of the flow valve 18, respectively, and the water outlet hole of the flow valve 18 is located at the water inlet end of the confluence water channel. When working, the valve core in the flow valve moves to adjust the water flow entering the two water inlet holes according to a fixed ratio, thereby adjusting the water flow from the water outlet hole of the flow valve to the confluence water channel.

[0113] As can be seen from the above, in this embodiment, the flow valve 18 is arranged at the outlet of the cold water channel, the outlet of the hot water channel and the inlet of the confluence channel, and is used to adjust the water flow at the water outlet 4. Obviously, the inlet of the confluence channel also belongs to the confluence channel. In some other embodiments of the present application, a flow valve with only one water inlet hole and one water outlet hole can also be used, and the flow valve is arranged in the main water channel (such as the middle section) of the confluence water channel. The cold and hot water that have been merged in the confluence water channel flow to the water outlet 4 after the flow rate is adjusted by the flow valve.

[0114] The key improvement of this embodiment is that the faucet is also equipped with a return water interface 3, a water control valve 8, two water temperature sensors 11 and a switch sensor 12. Among them:

[0115] The return water interface 3 is provided at the bottom of the faucet body and arranged in parallel with the cold water interface 1 and the hot water interface 2. In actual application, the return water interface 3 is connected to an external return water pipe. Usually, the return water pipe and the hot water supply pipe are connected to the same hot water tank, such as the fourth embodiment described later, so that the cold water at the hot water interface 2 that has not reached the corresponding temperature value can be returned to the hot water tank by means of the return water pipe.

[0116] The water control valve 8 is provided on both the cold water flow channel and the hot water flow channel. The water in the cold water flow channel and the hot water flow channel first passes through the water control valve 8, then flows through the flow valve 18, and then is drawn out from the water outlet 4 for use. The water control valve 8 includes a fixed valve body 801 and a movable valve body 802 arranged close to the fixed valve body and capable of rotating around a rotation axis m. The movable valve body 802 is arranged on the downstream side of the fixed valve body 801.

[0117] The fixed valve body 801 is provided with: a first cold water hole 801a located on the cold water flow channel (communicated with the cold water interface 1), a first hot water hole 801b located on the hot water flow channel (communicated with the hot water interface 2), and a return water hole 801c communicated with the return water interface 3.

[0118] The movable valve body 802 is provided with a second cold water hole 802a and a second hot water hole 802b. The second cold water hole 802a and the second hot water hole 802b are connected to the downstream water outlet 4, except that in this embodiment, the above-mentioned flow valve 18 is provided on the communication path between the second cold water hole 802a, the second hot water hole 802b and the downstream water outlet 4, and the flow valve 18 can connect / block the communication path between the second cold water hole 802a, the second hot water hole 802b and the downstream water outlet 4. One side of the movable valve body 802, and the side close to the fixed valve body 801, is provided with a return water drainage groove 802c that is concave inward and connected to the return water hole 801c, and the return water drainage groove 802c is separated from the second cold water hole 802a and the second hot water hole 802b on the movable valve body 802.

[0119] When the movable valve body 802 rotates (around the aforementioned rotation axis) to Fig. 9 In the first position shown, the movable valve body 802 (the solid part) abuts against the openings of the first cold water hole 801a and the first hot water hole 801b, thereby blocking the first cold water hole 801a and the first hot water hole 801b at the same time - the second cold water hole is isolated from the first cold water hole, and the second hot water hole is isolated from the first hot water hole. In addition, the return water drainage groove 802c is isolated from the first cold water hole 801a and the first hot water hole 801b, and the upstream cold water and hot water passive valve bodies 802 are blocked at the first cold water hole 801a and the first hot water hole 801b respectively.

[0120] When the movable valve body 802 rotates to Fig.10 When in the second position shown, a part of the return water drainage groove 802c rotates to the position of the first hot water hole 801b, thereby connecting the first hot water hole 801b with the return water hole 801c. At this time, the movable valve body still blocks the first cold water hole and the first hot water hole on the fixed valve body - the second cold water hole 802a is separated from the first cold water hole 801a, and the second hot water hole is separated from the first hot water hole. The cold and hot water in the first cold water hole and the first hot water hole cannot pass through the movable valve body to flow downstream. The water flowing from the upstream hot water interface 2 can only pass through the first hot water hole 801b, the return water drainage groove 802c, the return water hole 801c, and the return water interface 3 in turn into the external return water pipe, and then flow from the return water pipe to the corresponding water tank.

[0121] When the movable valve body 802 rotates to Figure 13 to Figure 15 In the third position shown, the return water diversion groove 802c is isolated from the first hot water hole 801b and the first cold water hole 801a, and the movable valve body no longer blocks the first cold water hole and the first hot water hole - the second cold water hole 802a is connected to the first cold water hole 801a, and the second hot water hole 802b is connected to the first hot water hole 801b. The cold and hot water from the upstream can smoothly enter the second cold water hole 802a and the second hot water hole 802b of the movable valve body 802, respectively, and flow to the downstream flow valve 18 and the water outlet 4.

[0122] The movable valve body 802 of the water control valve 8 is connected to another motor 9 disposed in the faucet body, and the motor 9 is used to drive the movable valve body 802 to rotate so that the movable valve body 802 can be selectively in various working positions. The motor 9 used to drive the movable valve body 802 is also a stepping motor.

[0123] There are two water temperature sensors 11, one of which is arranged on the hot water flow channel between the hot water interface 2 and the first hot water hole 801b, so as to detect the water temperature of the hot water channel from the hot water interface 2 to the first hot water hole 801b. The other water temperature sensor 11 is arranged on the confluence water channel, downstream of the previous water temperature sensor 11, so as to detect the water temperature at the confluence water channel and the water outlet 4. And the upstream water temperature sensor 11 is connected to the above-mentioned "another motor 9" - that is, the motor circuit connected to the moving valve body, so as to use the aforementioned water temperature detected by it as a relevant parameter to regulate the action of the motor 9.

[0124] To facilitate the description of the solution of this embodiment, the upstream water temperature sensor 11 is called the first water temperature sensor, the downstream water temperature sensor 11 is called the second water temperature sensor, the motor that drives the water control valve 8 is called the first motor, and the motor that drives the flow valve 18 is called the second motor.

[0125] In this embodiment, the water adjustment switch 6 is a rotary switch that can be lifted up and down and rotated left and right. However, the water adjustment switch 6 is not physically connected to the flow valve 18, but indirectly controls the state of the flow valve 18 by means of a circuit structure. Specifically: the faucet is equipped with a switch sensor 12 that cooperates with the water adjustment switch 6, and the switch sensor 12 is used to detect the action of the water adjustment switch 6. Moreover, the switch sensor 12 is connected to the circuit of the above-mentioned two motors 9, so as to use the detected action position of the water adjustment switch as a related parameter to control the action of the two motors 9.

[0126] The switch sensor 12 is mainly composed of a contact switch 1201 and a potentiometer 1202. The contact switch 1201 is physically matched with the water adjustment switch 6, and the potentiometer 1202 is physically connected to the water adjustment switch 6. Pressing the water adjustment switch 6 causes the contact switch to disconnect. Lifting the water adjustment switch 6, the contact switch automatically connects under the elastic force of the internal elastic element. In this way, the on-off state of the water adjustment switch 6 is determined by the on and off signals of the contact switch. When the water adjustment switch 6 rotates left and right, the resistance value of the potentiometer 1202 changes. The rotation position of the water adjustment switch 6 is indirectly known through the resistance value of the potentiometer 1202 connected to the relevant circuit, and then the working state of the flow valve 18 is adjusted.

[0127] Specifically in this embodiment, when the switch sensor 12 detects that the water adjustment switch 6 is in the closed position, it means that no water is needed, and the first motor 9 drives the moving valve body 802 to rotate to the above-mentioned first position. Generally, when the switch sensor 12 detects that the water adjustment switch 6 is in the closed position, the above-mentioned flow valve 18 has already cut off the water flow, so it is not necessary whether the first motor 9 drives the moving valve body 802 to rotate to the above-mentioned first position at this time. When the switch sensor 12 detects that the water adjustment switch 6 is in the open position, and the water temperature detected by the first water temperature sensor 11 is lower than the set temperature, it means that water is needed and the hot water temperature at the water control valve 8 is too low. The first motor 9 connected to the switch sensor and the first water temperature sensor circuit receives the relevant signal and drives the moving valve body 802 to rotate to the above-mentioned second position, and the low-temperature hot water at the water control valve 8 is discharged from the return water interface 3 to allow the upstream high-temperature hot water to flow to the water control valve 8. When the switch sensor 12 detects that the water adjustment switch 6 is in the open position and the water temperature detected by the first water temperature sensor 11 reaches the set temperature, it means that the hot water temperature at the water control valve 8 has reached the requirement. The first motor 9 connected to the switch sensor and the first water temperature sensor circuit receives the relevant signal and drives the valve body 802 to rotate to the above-mentioned third position, ensuring that the temperature of the hot water flowing to the flow valve 18 is high enough, thereby ensuring that the temperature of the water flowing out of the water outlet 4 is not too low.

[0128] When the water adjustment switch 6 is turned to the left, the resistance of the potentiometer 1202 connected to the second motor 9 control circuit increases, and the second motor 9 drives the flow valve 18 to operate, so that the water flow at the water outlet 4 is reduced or even closed. When the water adjustment switch 6 is turned to the right, the resistance of the potentiometer 1202 connected to the second motor 9 control circuit decreases, and the second motor 9 drives the flow valve 18 to operate, so that the water flow at the water outlet 4 increases.

[0129] In this embodiment, the rotation axis, i.e., the rotation axis of the movable valve body 802, coincides with the hole axis of the water return hole 801c, or in other words, the rotation axis is the hole axis of the water return hole 801c. The first cold water hole 801a, the first hot water hole 801b, the second cold water hole 802a, and the second hot water hole 802b are respectively arranged on the radial side of the water return hole 801c. Moreover, the hole distance between the first cold water hole 801a and the water return hole 801c is equal to the hole distance between the second cold water hole 802a and the water return hole 801c, so as to ensure that when the movable valve body 802 rotates, the first cold water hole 801a and the second cold water hole 802a can overlap and connect with each other (completely or partially). The hole distance between the first hot water hole 801b and the return water hole 801c is equal to the hole distance between the second hot water hole 802b and the return water hole 801c, so as to ensure that when the movable valve body 802 rotates, the first hot water hole 801b and the second hot water hole 802b can overlap and connect with each other (completely or partially).

[0130] Reference Figures 5 to 16As shown, in this embodiment, the first cold water hole 801a, the first hot water hole 801b, the second cold water hole 802a, and the second hot water hole 802b on the water control valve 8 are all arc-shaped long strip holes extending around the above-mentioned rotation axis, that is, the center of the arc-shaped long strip holes is located on the above-mentioned rotation axis of the movable valve body 802. Moreover, the distance between the first cold water hole 801a and the first hot water hole 801b in the circumferential direction around the axis of the return hole 801c is greater than the distance between the second cold water hole 802a and the second hot water hole 802b in the circumferential direction around the axis of the return hole 801c. In other words, if the first cold water hole 801a is arranged on the first radial side of the return water hole 801c, the first hot water hole 801b is arranged on the second radial side of the return water hole 801c, the second cold water hole 802a is arranged on the third radial side of the return water hole 801c, and the second hot water hole 802b is arranged on the fourth radial side of the return water hole 801c, then the angle between the first radial and the second radial is greater than the angle between the third radial and the fourth radial.

[0131] Reference Figures 9 to 16 As shown. Fig. 9 In the embodiment, the first cold water hole 801a is isolated from the second cold water hole 802a, and the first hot water hole 801b is isolated from the second hot water hole 802b. The cold and hot water are blocked upstream of the second cold water hole 802a and the second hot water hole 802b. Fig. 9 Rotate the water control valve clockwise by an angle of α1 to make it Fig.33 In the state shown, the first cold water hole 801a is isolated from the second cold water hole 802a, the first hot water hole 801b is isolated from the second hot water hole 802b, and the return water drainage groove 802c connects the first hot water hole 801b with the return water hole 801c. Fig.10 The water control valve 8 is rotated counterclockwise by an angle of α2 so that the water control valve 8 is in the Fig.11 In the state shown, α2>α1, the first cold water hole 801a is connected with the second cold water hole 802a in a small area, the first hot water hole 801b is separated from the second hot water hole 802b, and the return water drainage groove 802c is separated from the first hot water hole 801b. Fig.11 The valve body 802 is rotated counterclockwise, and the connection area between the first cold water hole 801a and the second cold water hole 802a is gradually increased until Fig.12 The first cold water hole 801a and the second cold water hole 802a are fully connected, and the first hot water hole 801b and the second hot water hole 802b are always separated during this process, and the return water drainage groove 802c is always separated from the first hot water hole 801b. Fig.12The valve body 802 is rotated counterclockwise, the first hot water hole 801b and the second hot water hole 802b begin to connect, and the connecting area between the first cold water hole 801a and the second cold water hole 802a gradually decreases, and the connecting area between the first hot water hole 801b and the second hot water hole 802b gradually increases, and the return water drainage groove 802c is always separated from the first hot water hole 801b. Figures 13 to 15 When the movable valve body 802 turns to Fig.16 In the state shown, the first cold water hole 801a is isolated from the second cold water hole 802a, the first hot water hole 801b is connected to the second hot water hole 802b in full area, and the return water drainage groove 802c is isolated from the first hot water hole 801b.

[0132] It can be seen that in the process of the movable valve body 802 of the water control valve 8 rotating around the aforementioned rotation axis, the conduction area of ​​the first cold water hole 801a and the second cold water hole 802a will not always be equal to the conduction area of ​​the first hot water hole 801b and the second hot water hole 802b. The ratio of the conduction area of ​​the first cold water hole 801a and the second cold water hole 802a to the conduction area of ​​the second cold water hole 802a and the second hot water hole 802b can be adjusted by changing the rotation position of the movable valve body 802, thereby adjusting the flow ratio and water temperature of the cold and hot water flowing into the downstream flow valve 18 and the water outlet 4.

[0133] Obviously, under the guidance of the above content, technical personnel in this field can easily know that as long as the distance between the first cold water hole 801a and the first hot water hole 801b is ≠ the distance between the second cold water hole 802a and the second hot water hole 802b in the circumferential direction around the axis of the return hole 801c, and then simply set the sizes and relative positions of the first cold water hole 801a, the first hot water hole 801b, the second cold water hole 802a and the second hot water hole 802b, the flow ratio of cold and hot water can be adjusted through the water control valve 8.

[0134] In some other embodiments of the present application, even if the distance between the first cold water hole 801a and the first hot water hole 801b in the direction surrounding the axis of the return hole = the distance between the second cold water hole 802a and the second hot water hole 802b in the direction surrounding the axis of the return hole, as long as the sizes of the first cold water hole 801a, the first hot water hole 801b, the second cold water hole 802a and the second hot water hole 802b are reasonably adjusted, the flow ratio of cold and hot water can also be adjusted by the water control valve 8.

[0135] exist Fig.13 , Fig.14 and Fig.15 In the embodiment, the first cold water hole 801a and the first hot water hole 801b are connected to the second cold water hole 802a and the second hot water hole 802b respectively at the same time, so Fig.13 , Fig.14 and Fig.15The movable valve body 802 of the central control water valve 8 is in the third working position.

[0136] Furthermore, in this embodiment, the first cold water hole 801a and the first hot water hole 801b are completely separated in the circumferential direction around the axis of the return water hole 801c, and the second cold water hole 802a and the second hot water hole 802b are partially overlapped in the circumferential direction around the axis of the return water hole 801c. Moreover, the first cold water hole 801a and the first hot water hole 801b are arranged on two opposite sides of the return water hole 801c in the radial direction.

[0137] In this embodiment, the backwater drainage groove 802c is a linear groove extending in the radial direction of the backwater hole 801c, and has a first end and a second end on both sides of the length direction. The first end of the backwater drainage groove 802c is on the hole axis of the backwater hole 801c, so that no matter what angle the movable valve body 802 rotates to, the backwater drainage groove 802c is always connected to the backwater hole 801c. The distance between the second end of the backwater drainage groove 802c and the backwater hole 801c is ≥ the distance between the first hot water hole 801a and the backwater hole 801c, thereby ensuring that after the movable valve body 802 rotates to the corresponding position, the backwater drainage groove 802c can communicate with the first hot water hole 801b, thereby connecting the backwater hole 801c with the first hot water hole 801b.

[0138] In order to prevent the return water drainage groove 802c from connecting the return water hole 801c with the first cold water hole 801a during the rotation of the movable valve body 802, in this embodiment, the hole distance between the first cold water hole 801a and the return water hole 801c is greater than the distance between the second end of the return water drainage groove 802c and the return water hole 801c.

[0139] As mentioned above, the distance between the second end of the return water drainage groove 802c and the return water hole 801c is ≥ the distance between the first hot water hole 801a and the return water hole 801c, and the hole distance between the first cold water hole 801a and the return water hole 801c is greater than the distance between the second end of the return water drainage groove 802c and the return water hole 801c. Therefore, the hole distance between the first cold water hole 801a and the return water hole 801c is greater than (≠) the hole distance between the first hot water hole 801b and the return water hole 801c. As mentioned above, the hole distance between the first cold water hole 801a and the return water hole 801c is equal to the hole distance between the second cold water hole 802a and the return water hole 801c, and the hole distance between the first hot water hole 801b and the return water hole 801c is equal to the hole distance between the second hot water hole 802b and the return water hole 801c. Therefore, no matter which position the movable valve body 802 rotates to, there will be no problem of the first cold water hole being connected to the second hot water hole, the first hot water hole being connected to the second cold water hole, and the cold and hot water flowing in series.

[0140] In this embodiment, the fixed valve body 801 and the movable valve body 802 are both wear-resistant ceramic sheets, and the outer contours of both are circular. The surface of the fixed valve body 801 is provided with an inwardly concave circular groove 801d, the axis of which coincides with the rotation axis m, and the movable valve body 802 is closely embedded in the circular groove 801d, and the first cold water hole 801a, the first hot water hole 801b and the return water hole 801c are all arranged at the bottom of the circular groove 801d. The circular groove 801d on the fixed valve body 801 defines the position of the movable valve body 802, preventing the movable valve body 802 from radially shifting during the rotation process.

[0141] As can be seen from the above, the movable valve body 802 of the central control water valve 8 of the faucet is a movable part. In actual use, the movable valve body 802 will often be rotated to selectively connect / cut off the cold and hot water flow channels. In order to ensure that the water outlet 4 of the faucet has a stable water outlet direction to facilitate the user's water use, the water outlet 4 and the flow valve 18 and other components cannot rotate synchronously with the movable valve body 802. In this way, when the faucet is used to release water, the second cold water hole 802a and the second hot water hole 802b on the movable valve body 802 will move relative to the downstream flow valve 18 and the water outlet 4. This embodiment adopts the same scheme as the first embodiment to ensure that the second cold water hole 802a and the second hot water hole 802b on the movable valve body 802 are always connected to the downstream water outlet 4 and do not leak during the rotation process:

[0142] Reference Figures 1 to 5 , Figures 17 to 23 As shown, the faucet is also equipped with a water outlet guider 7 located downstream of the water control valve 8, and the water outlet guider 7 includes a guider housing 701 and a guider core 702. Among them:

[0143] The flow guide housing 701 is provided with a cylindrical inner cavity 701a and a downstream cold water diversion hole 701b and a downstream hot water diversion hole 701c which are in communication with the cylindrical inner cavity. The axis of the cylindrical inner cavity 701a is the above-mentioned rotation axis, or in other words, the axis of the cylindrical inner cavity 701a coincides with the rotation axis of the movable valve body 802. The water inlet end of the downstream cold water diversion hole 701b and the water inlet end of the downstream hot water diversion hole 701c both extend to the cavity wall of the cylindrical inner cavity, and the water inlet end of the downstream cold water diversion hole 701b and the water inlet end of the downstream hot water diversion hole 701c are arranged at intervals in the axial direction of the cylindrical inner cavity 701a. The water outlet end of the downstream cold water diversion hole 701b and the water outlet end of the downstream hot water diversion hole 701c are located outside the cylindrical inner cavity 701a.

[0144] The flow guide core 702 is movably arranged in the cylindrical inner cavity 701a in a manner that it can rotate around the above-mentioned rotation axis (i.e., the rotation axis of the movable valve body 802), and the flow guide core 702 is fixedly connected to the movable valve body 802. The outer periphery of the flow guide core 702 is formed with two annular grooves 702a surrounding the above-mentioned rotation axis, and the two annular grooves 702a are arranged at intervals along the length direction of the rotation axis. The flow guide core 702 is also formed with an upstream cold water diversion hole 702b and an upstream hot water diversion hole 702c. The water outlet end of the upstream cold water diversion hole 702b extends to the groove wall of the first annular groove 702a, and the water outlet end of the upstream hot water diversion hole 702c extends to the groove wall of the second annular groove 702a. The water inlet end of the upstream cold water diversion hole 702b is connected to the second cold water hole 802a, and the water inlet end of the upstream hot water diversion hole 702c is connected to the second hot water hole 802b. The water inlet end of the downstream cold water guide hole 701b is located at the notch of the first annular groove 702a, and the water inlet end of the downstream hot water guide hole 701c is located at the notch of the second annular groove 702a.

[0145] When in use, the diverter core 702 fixed to the moving valve body 802 of the water control valve rotates synchronously with the moving valve body 802. When the diverter core 702 rotates to any position, the water inlet ends of the upstream and downstream cold water diversion holes 701b and the downstream hot water diversion holes 701c of the diverter housing 701 are always respectively located at the notches of the two annular grooves 702a on the diverter core 702, and the upstream cold water diversion hole 702b and the upstream hot water diversion hole 702c are always respectively connected with the downstream cold water diversion hole 701b and the downstream hot water diversion hole 701c. When the movable valve body 802 of the water control valve 8 rotates to the above-mentioned third position, the cold water and hot water flowing out of the second cold water hole 802a and the second hot water hole 802b on the movable valve body 802 respectively enter the upstream cold water guide hole 702b and the upstream hot water guide hole 702c, and then flow into the two annular grooves 702a of the guide core 702 through the upstream cold water guide hole 702b and the upstream hot water guide hole 702c, and then flow from the two annular grooves 702a into the downstream cold water guide hole 701b and the downstream hot water guide hole 701c on the guide housing 701, and then flow to the two water inlet holes of the downstream flow valve 18.

[0146] In order to prevent the cold water in the first annular groove 702a from entering the second annular groove 702a, and to prevent the hot water in the second annular groove 702a from entering the first annular groove 702a, and to prevent the water in the two annular grooves 702a from overflowing from the inner wall of the drain housing 701, it is necessary to ensure the sealing between the notches of the two annular grooves 702a and the wall of the cylindrical inner cavity 701a. Based on this, in this embodiment, three rubber sealing rings 702d are fixedly sleeved around the rotation axis on the periphery of the drain core 702, one of the rubber sealing rings 702d is arranged between the two annular grooves 702a, and the other two rubber sealing rings 702d are respectively arranged on both sides of the axial direction of the two annular grooves 702a, and the three rubber sealing rings 702d and the two annular grooves 702a are alternately arranged along the length direction of the above-mentioned rotation axis. Each rubber sealing ring 702d is arranged to seal against the wall of the cylindrical inner cavity 701a.

[0147] To prevent the rubber sealing ring 702d from axially moving on the drain core 702 and improve the position stability of the rubber sealing ring 702d, three circles of sealing ring grooves are integrally arranged on the periphery of the drain core 702 in this embodiment, and the three rubber sealing rings 702d are fixedly embedded in the aforementioned three circles of sealing ring grooves.

[0148] In actual application, the movable valve body 802 and the fixed valve body 801 of the water control valve 8 rotate relative to each other. If there is a gap between the contact mating surfaces of the movable valve body 802 and the fixed valve body 801, the water in the cold water hole and the hot water hole will overflow from the aforementioned gap. In this regard, a spring can be set in the faucet body, and the spring applies an elastic force to the movable valve body 802 along the hole axis direction of the return hole 801c pointing to the fixed valve body 801. The movable valve body 802 is pressed toward the fixed valve body 801 under the elastic force of the aforementioned spring, so that the movable valve body 802 and the fixed valve body 801 are always kept in close contact. The aforementioned spring can be sandwiched between the aforementioned flow guide core 702 and the flow guide housing 701, and does not directly contact the movable valve body 802. The elastic force applied by the spring to the flow guide core 702 is indirectly transmitted to the movable valve body 802, thereby ensuring that the movable valve body 802 and the fixed valve body 801 are always kept in close contact. Specifically, the spring can be arranged in the cylindrical inner cavity 701a of the drain housing 701, and the axis of the spring coincides with the axis of the cylindrical inner cavity 701a, one end of the spring abuts on the cavity arm of the cylindrical inner cavity 701a, and the other end abuts on the drain core 702.

[0149] The first motor 9 for driving the movable valve body 802 to rotate is directly connected to the flow diverter core 702 instead of the movable valve body 802. When working, the motor 9 directly drives the flow diverter core 702 to rotate, and then the flow diverter core 702 drives the movable valve body 802 to rotate synchronously.

[0150] In order to prevent the faucet from being unable to be used normally during a power outage, the present embodiment is further provided with a rotating hand wheel 14 connected to the water control valve movable valve body 802. During a power outage, the user can manually rotate the aforementioned rotating hand wheel 14 to turn the movable valve body 802 to a corresponding position, so that the faucet can flow water normally or cut off the water supply.

[0151] In addition, in order to allow the user to intuitively know the water temperature, the present embodiment sets a second water temperature sensor 11 in the water outlet 4, and fixes a touch display 15 connected to the circuit of the second water temperature sensor 11 on the faucet body. The aforementioned second water temperature sensor detects the water temperature at the water outlet 4 in real time, and transmits the water temperature signal to the touch display 15, which is displayed by the touch display 15. Obviously, the touch display 15 can also be replaced by an ordinary display without a control function. Of course, we can also connect the water temperature sensor 11 in the above-mentioned hot water flow channel to the touch display 15 circuit, so that the hot water temperature can be displayed in real time on the touch display 15.

[0152] Furthermore, a processor 16 and a backup battery 17 for powering the processor 16 are fixedly arranged on the inner side of the above-mentioned touch display 15, and the processor 16 is respectively connected to the above-mentioned two motors 9, two water temperature sensors 11, switch sensor 12 and touch display 15 circuit. In other words, the processor 16 is arranged on the connection circuit between the above-mentioned motor 9, two water temperature sensors 11, two switch sensors 12 and touch display 15, and the processor 16 processes various signals. When working, the water temperature sensor 11 transmits the water temperature signal detected by it, and the switch sensor 12 transmits the switch state signal detected by it to the processor 16, and the processor 16 then follows up with the above-mentioned signals it receives to perform calculations and processing, displays relevant information on the touch display 15, and controls the motor 9 to perform relevant actions. This processor 16 can be directly purchased on the market and can be used after simple programming.

[0153] In addition, the aforementioned touch display 15 includes a temperature setting module connected to the processor 16 circuit. In actual application, when the user sets the pre-used water temperature such as 35°C through the temperature setting module, and the water adjustment switch 6 is in the open state, if the water temperature detected by the first water temperature sensor 11 is lower than the second set temperature such as 50°C, it means that water is needed and the hot water temperature at the water control valve 8 is too low, the first motor 9 drives the valve body 802 to rotate to the above-mentioned second position, and the low-temperature hot water at the water control valve 8 is discharged from the return water interface 3 to allow the upstream high-temperature hot water to flow to the water control valve 8. When the water temperature detected by the water temperature sensor 11 reaches the set temperature of 50°C, it means that the hot water temperature at the water control valve 8 has reached the requirement, the first motor 9 drives the valve body 802 to rotate to the first cold water hole, the first hot water hole and the second cold water hole, and the second hot water hole are connected to the above-mentioned third position respectively, at this time, warm water mixed with cold water and hot water flows out from the water outlet 4, and the second water temperature sensor 11 detects the water temperature at the confluence waterway and the water outlet 4 in real time. As mentioned above, many angle positions of the water control valve moving valve body 802 belong to the third position where the first cold water hole, the first hot water hole, the second cold water hole, and the second hot water hole are connected. The difference is that when the moving valve body 802 is in the third position at different angles, the flow ratio of cold and hot water flowing out of the second cold water hole 802a and the second hot water hole 802b is different. Therefore, if the second water temperature sensor 11 detects that the water temperature at the water outlet 4 is always lower than the set temperature of 35°C within the set time period (generally about 1 second), the first motor 9 receives the relevant signal and drives the moving valve body 802 to rotate at a small angle to increase the connection area between the first hot water hole and the second hot water hole, and reduce the connection area between the first cold water hole and the second cold water hole, so that the water temperature at the water outlet 4 is increased until it reaches 35°C. If the second water temperature sensor 11 detects that the water temperature at the water outlet 4 is always higher than the set temperature of 35°C within the set time period, the first motor 9 receives the relevant signal to drive the valve body 802 to rotate in the opposite direction at a small angle to reduce the connection area between the first hot water hole and the second hot water hole, and increase the connection area between the first cold water hole and the second cold water hole, so that the water temperature at the water outlet 4 is reduced until it reaches 35°C.

[0154] Refer to Figures 1 to 23Generally speaking, when the switch sensor 12 transmits the signal that the water adjustment switch 6 is in the on state to the processor 16, that is, when the water adjustment switch 6 is in the on state: (1) If the processor 16 receives the first sensed water temperature transmitted by the first water temperature sensor and the temperature is lower than the set temperature, the processor 16 sends a control signal to the first motor 9, so that the first motor drives the movable valve body 802 of the water control valve 8 to rotate to the second position. At this time, the return water diversion groove 802c connects the first hot water hole 801b with the return water hole 801c, and the movable valve body 802 blocks the first cold water hole 801a and the first hot water hole 801b at the same time. (2) If the processor 16 receives the first sensed water temperature transmitted by the first water temperature sensor and reaches the set temperature, and the first sensed water temperature> the target temperature transmitted by the temperature setting module received by the processor 16> the second sensed water temperature transmitted by the second water temperature sensor received by the processor 16, the processor 16 sends a control signal to the first motor to drive the valve body 802 to the third position, at which time the return water diversion groove 802c is separated from the first hot water hole 801b and the first cold water hole 801a, the second cold water hole 802a is connected to the first cold water hole 801a, and the second hot water hole 802b is connected to the first hot water hole 801b. In addition, the ratio of the connection area between the second hot water hole 802b and the first hot water hole 801b to the connection area between the second cold water hole 802a and the first cold water hole 801a is positively correlated with the difference between the target temperature and the second sensed temperature. The greater the difference between the target temperature and the second sensing temperature, the greater the ratio of the connection area between the second hot water hole 802b and the first hot water hole 801b to the connection area between the second cold water hole 802a and the first cold water hole 801a.

[0155] Preferably, a third water temperature sensor can also be provided on the cold water circuit of the faucet, especially on the communication path between the first cold water hole 801a and the cold water interface 1, and the third water temperature sensor is connected to the circuit of the processor 16. In practical applications, the added third water temperature sensor detects the cold water temperature in real time, and the processor 16 performs calculations based on the cold water temperature, the hot water temperature at the water control valve, and the set water outlet temperature as parameters, and then controls the first motor 9 to accurately rotate the movable valve body 802 of the water control valve 8 to the third position of the optimal angle, so that the water flow temperature initially flowing out of the water outlet 4 is very close to the set 35°C.

[0156] It can be seen that compared with the first embodiment, the second embodiment can directly and accurately set the water temperature at the water outlet 4, and no longer needs to rely on the user to obtain a rough temperature of the water flow by adjusting the angle of the manual handle based on past experience.

[0157] The above-mentioned touch display 15 is an integration of a temperature display module and a temperature setting module. In some other embodiments of the present application, the touch display 15 can be completely eliminated, and a temperature display module and a temperature setting module with other component structures can be used, of course, if we still want to retain the temperature display function and temperature setting function of the faucet. For example, we can set this form of temperature setting module on the faucet body: 1. A combination of increase and decrease temperature buttons consisting of a first button indicating temperature increase and with a "+" pattern printed on the surface, and a first button indicating temperature decrease and with a "-" pattern printed on the surface. 2. A knob with a rotating arrow printed on the surface or nearby. The direction indicated by the aforementioned rotating arrow indicates the direction of rotation for increasing temperature, and the reverse direction is the direction of rotation for decreasing temperature. This structure can only vaguely indicate the water temperature of the water outlet preset by the user.

[0158] The water regulating switch 6 may also be in other forms, such as a button, a knob, etc.

[0159] Embodiment 2:

[0160] In the above embodiment, if the first motor 9 driving the movable valve body 802 is self-locked after power failure, the rotating hand wheel 14 will not be able to rotate the movable valve body 802, thereby causing the faucet to be unusable after power failure. Figure 24 to Figure 27 A second specific embodiment of the faucet of the present application is shown. The faucet of this embodiment has a structure basically the same as that of the first embodiment, with the main difference being that a clutch 24 is provided on the connection path between the motor 9 and the movable valve body 802 in this embodiment.

[0161] The clutch 24 is a manual clutch that can be manually adjusted to "closed" and "closed". During normal operation, the user adjusts the clutch 24 to the closed state, and the motor 9 can drive the moving valve body 802 to rotate. After power failure, the clutch 24 is adjusted to the loose state. Even if the motor 9 is self-locked, the user can operate the rotating hand wheel 14 to drive the moving valve body 802 to rotate.

[0162] Obviously, the clutch 24 can also be a conventional one-way clutch. During normal operation, the motor 9 rotates forward, and the clutch 24 in the tightened state transmits the power of the motor 9 to the movable valve body 802, driving the movable valve body 802 to rotate to various working positions. After power failure, the user only rotates the rotating hand wheel 14 in the reverse direction, thereby dragging the movable valve body 802 to rotate in the reverse direction to various working positions. At this time, the clutch 24 is in a loose state, and the self-locking motor 9 will not affect the rotation of the movable valve body 802.

[0163] The clutch actuating portion 24a of the manual clutch is located on the surface of the faucet to facilitate the user to control the tightening and loosening of the manual clutch.

[0164] Reference Fig.25 and Fig. 27As shown, the clutch 24 is mainly composed of a first part and a second part, wherein the first part is fixed to the flow guide core 702, the second part is circumferentially fixedly connected to the motor shaft of the motor 9, and the second part can move axially on the motor shaft, and the clutch actuator 24a is formed on the second part. In the electric mode, the second part of the clutch moves down, and the second part is spline-connected with the first part and tightened with each other. In the manual mode after power failure, the second part moves up, and the second part and the first part are separated from each other.

[0165] Example 3: Faucet

[0166] Figures 28 to 39 The third specific embodiment of the faucet of the present application is shown. Different from the above four embodiments, this embodiment adopts another method to solve the problem of power-off use of the faucet. It is not equipped with a rotating handwheel and a clutch, but is equipped with: a cold water bypass across the movable valve body 802 to connect the cold water flow channel upstream of the movable valve body 802 and the water flow channel downstream of the movable valve body (the downstream water flow channel can be the cold water flow channel or the converging water channel downstream of the movable valve body); a hot water bypass across the movable valve body 802 to connect the hot water flow channel upstream of the movable valve body 802 and the water flow channel downstream of the movable valve body (the downstream water flow channel can be the hot water flow channel or the converging water channel downstream of the movable valve body); a cold water bypass switch provided on the cold water bypass for connecting / disconnecting the cold water bypass; and a hot water bypass switch provided on the hot water bypass for connecting / disconnecting the hot water bypass.

[0167] In the electric mode, the cold water bypass switch and the hot water bypass switch cut off the hot water bypass and the hot water bypass respectively, and the cold and hot water entering from the cold and hot water interfaces can only pass through the movable valve body 802. In the manual mode after power failure, the cold water bypass switch and the hot water bypass switch connect the cold water bypass and the hot water bypass respectively, and even if the movable valve body 802 of the water control valve 8 is in the first position, the cold and hot water can bypass the closed movable valve body 802 and be led from the cold water bypass and the hot water bypass to the downstream waterway of the movable valve body, and the water can be discharged normally.

[0168] In this embodiment, the water inlet of the cold water bypass extends to the first cold water hole 801a, the water inlet of the hot water bypass extends to the first hot water hole 801b, the cold water bypass and the downstream cold water diversion hole 701b have the same water outlet, and the hot water bypass and the downstream hot water diversion hole 701c have the same water outlet. In other words, the cold water bypass is only responsible for guiding the cold water of the first cold water hole 801a to the water outlet of the downstream cold water diversion hole 701b, and the cold water bypass is only responsible for guiding the hot water of the first hot water hole 801b to the water outlet of the downstream hot water diversion hole 701c, and then guiding it to the water outlet 4 through the downstream waterway.

[0169] In this embodiment, the cold water bypass switch and the hot water bypass switch are linked to allow them to be opened and closed at the same time.

[0170] Further, a cold water tank 801e is provided on one side of the fixed valve body 801, which is the side away from the movable valve body 802. A hot water tank 801f is provided on one side of the fixed valve body 801, which is the side away from the movable valve body 802. The cold water tank 801e extends from the first cold water hole 801a to the outer surface of the fixed valve body, and the hot water tank 802e extends from the first hot water hole 801b to the outer surface of the fixed valve body. The cold water tank 801e and the hot water tank 801f are respectively part of the aforementioned cold water bypass and hot water bypass. The movable valve plate 25 is movably arranged on the side of the fixed valve body 801, and the movable valve plate 25 is formed with a third cold water hole 25a and a third hot water hole 25b arranged at intervals and corresponding to the cold water tank 801e and the hot water tank 801f respectively. The aforementioned cold water bypass switch and hot water bypass switch are both formed on the movable valve plate 25. When the movable valve plate 25 moves to a certain position, the third cold water hole 25a and the third hot water hole 25b are aligned with the cold water tank 801e and the hot water tank 801f respectively, so that the third cold water hole 25a is connected to the cold water tank 801e, the third hot water hole 25b is connected to the hot water tank 801f, and the cold water bypass and the hot water bypass are connected. When the movable valve plate 25 moves to another position, the third cold water hole 25a and the third hot water hole 25b are misaligned with the cold water tank 801e and the hot water tank 801f, and the movable valve plate 25 blocks the end of the cold water tank 801e and the hot water tank 801f extending to the outer surface of the fixed valve body, and the cold water bypass and the hot water bypass are isolated.

[0171] Similar to the above four embodiments, in order to facilitate the assembly of the fixed valve body 801 and the guide housing 701, this embodiment also has a valve sleeve 26 with a circumferential outer surface fixedly sleeved on the fixed valve body 801. The valve sleeve 26 is provided with a fourth cold water hole 26a that is radially through and communicated with the cold water tank 801e and a fourth hot water hole 26b that is radially through and communicated with the hot water tank. The movable valve plate 25 is an arc plate that is arranged against the aforementioned circumferential outer surface and can slide along the circumferential direction of the circumferential outer surface.

[0172] Furthermore, the flow diverter housing 701 further includes: a fixed valve body receiving chamber 701d, a cold water bypass hole 701e which is provided through the shell wall of the flow diverter housing and is a component of the cold water bypass, and a hot water bypass hole 701f which is provided through the shell wall of the flow diverter housing and is a component of the hot water bypass. The valve sleeve 26 and the fixed valve body 801 are fixed in the fixed valve body receiving chamber 701d, the water inlet end of the cold water bypass hole 701e extends to the fourth cold water hole 26a, and the water inlet end of the hot water bypass hole 701f extends to the fourth hot water hole 26b. The movable valve plate 25 is arranged close to the flow diverter housing 701 and the valve sleeve 26.

[0173] To facilitate the user to slide the movable valve plate 25, a notch 701g communicating with the fixed valve body receiving chamber 701d is provided on the wall of the flow guider housing 701. The actuating handle 25c on the movable valve plate 25 extends out of the notch 701g for the user to hold and operate.

[0174] In this embodiment, an arc-shaped valve plate sliding groove 701h is provided on the cavity wall of the fixed valve body accommodating cavity 701d, and the aforementioned movable valve plate 25 is slidably and closely arranged in the valve plate sliding groove 701h.

[0175] It can be seen from the records of the above embodiments that when the faucet is in the open state, the cold water flow channel and the hot water flow channel are connected to each other at the water outlet. In order to prevent the cold water in the cold water flow channel from flowing into the hot water flow channel when the hot water is insufficient, and to prevent the hot water in the hot water flow channel from flowing into the cold water flow channel when the cold water is insufficient, a one-way valve 27 is respectively provided in the cold water flow channel and the hot water flow channel in this embodiment, and the one-way valve 27 allows the water in the cold water flow channel and the hot water flow channel to flow in only one direction.

[0176] Specifically in this embodiment, one of the one-way valves 27 is disposed at the connection between the cold water bypass hole 701e and the downstream cold water guide hole 701b, and the other one-way valve 27 is disposed at the connection between the hot water bypass hole 701f and the downstream hot water guide hole 701c.

[0177] According to the technical concept of this embodiment, for faucets with cold water flow channels and hot water flow channels, and the cold and hot water flow channels are connected when in use (for example, a confluence water channel connected to the water outlet ends of the cold and hot water flow channels is set), a one-way valve 27 can be set on the cold water flow channel and the hot water flow channel to prevent the cold and hot water from flowing through each other.

[0178] Compared with the cold water flow channel connected to tap water, the hot water pipe that draws water from the hot water tank is more prone to water shortage and water outage problems. In order to save a one-way valve and save costs, a one-way valve 27 can be set only on the hot water flow channel where the probability of water shortage is higher.

[0179] It is not difficult to understand that the problem solved by setting the cold water bypass and hot water flow channel in the faucet in this embodiment is: in the case of power failure, if the movable valve body of the electric control water valve stops at the first position of cutting off the water flow, the cold water bypass and hot water flow channel can be manually opened to allow the water flow to bypass the closed electric control water valve and flow to the downstream water channel, thereby ensuring that the user can still use water normally in the case of power failure. Therefore, as long as a certain electric control valve cuts off the water channel and is difficult to open when the power is off, such a cold and hot water bypass can be set to manually bypass the closed electric control valve, and it is not important whether the electric control valve has a water return function.

[0180] In addition, if the cold and hot water bypass of this structure is configured in the above-mentioned embodiment 2, it is best to remove the second motor 9 that requires electricity, and physically connect the water adjustment switch 6 with the flow valve 18 (commonly known as mechanical connection), and drive the flow valve 18 to operate through the physical force applied by the water adjustment switch 6 to the flow valve 18. Moreover, in order to be able to adjust the flow through the flow valve 18 in the case of power failure, it is best to connect the water outlet end of the cold water bypass and the water outlet end of the hot water bypass to the confluence waterway upstream of the flow valve 18. The upstream cold water and hot water are respectively led from the cold water bypass and the hot water bypass to the confluence waterway, and then are led out from the water outlet 4 after the flow is adjusted by the flow valve 18.

[0181] In some other embodiments of the present application, the cold water interface 1 and the hot water interface 2 can be directly connected to the first cold water hole and the first hot water hole of the fixed valve body 801, respectively, and a confluence water channel can be directly arranged downstream of the second cold water hole and the second hot water hole of the movable valve body. In this case, the second cold water hole 802a and the second hot water hole 802b are located at the outlet ends of the cold water flow channel and the hot water flow channel, respectively. The cold water flow channel and the hot water flow channel in the faucet are very short, and are the internal flow channels of the cold water interface 1 and the hot water interface 2, respectively.

[0182] In other embodiments of the present application, the water outlet ends of the cold water flow channel and the water outlet ends of the hot water flow channel can also be led to a position very close to the water outlet 4. In this case, the length of the converging water channel in the faucet is very short.

[0183] Example 4: Water supply system

[0184] Reference Fig.40 As shown, the water supply system mainly includes a hot water tank 19, two faucets 100 and a water pipe 20. The faucet 100 on the left has the same structure as the faucet in the first embodiment, and the faucet 100 on the right has the same structure as the faucet in the second embodiment. A certain amount of hot water is stored in the hot water tank 19, and the hot water can be provided by a solar water heater, a gas water heater, an air energy water heater, or an electric water heater. The hot water tank 19 is connected to a hot water supply pipe 21 and a return pipe 22, and the hot water interfaces 2 of the two faucets 100 are respectively connected to the aforementioned hot water supply pipe 21, the return interfaces 3 of the two faucets 100 are respectively connected to the aforementioned return pipe 22, and the cold water interfaces 1 of the two faucets 100 are respectively connected to the aforementioned water pipe 20. In order to increase the return speed, a water pump 23 is also provided on the return pipe 22, and the water pump 23 is respectively connected to the processor 16 circuit of the two faucets.

[0185] When the water adjustment switch 6 of the left faucet 100 is in the open position, and the water temperature detected by the water temperature sensor 11 is lower than the set temperature, the motor 9 of the faucet receives the relevant signal and drives the moving valve body 802 to rotate to the second position mentioned above, and at the same time, the water pump 23 receives the relevant signal (temperature signal and the switch signal of the water adjustment switch) and operates to quickly extract the low-temperature hot water in the hot water flow channel upstream of the water control valve of the left faucet and return it to the hot water tank 19. Similarly, when the water adjustment switch 6 of the right faucet 100 is in the open position, and the water temperature detected by the water temperature sensor 11 is lower than the set temperature, the first motor 9 of the right faucet receives the relevant signal and drives the moving valve body 802 to rotate to the second position mentioned above, and at the same time, the water pump 23 receives the relevant signal (the switch is turned on, and the hot water temperature at the water control valve has not reached the set value) and operates to quickly extract the low-temperature hot water in the hot water flow channel upstream of the water control valve of the right faucet and return it to the hot water tank 19.

[0186] Obviously, the water pump 23 can also be arranged on the hot water supply pipe 21. In this case, when the movable valve body 802 is in the second position, the water pump 23 on the hot water supply pipe 21 can also quickly drive the low-temperature hot water in the hot water flow channel upstream of the faucet water control valve to the hot water tank 19. Moreover, when the movable valve body 802 is in the third position, the water pump 23 can also increase the water flow speed in the hot water flow channel.

[0187] If an automatic booster pump that can be automatically turned on according to water flow and water pressure is provided on the return pipe 22 or the hot water supply pipe 21, it is not necessary to electrically connect the automatic booster pump to the faucet processor 16. This is because when the water control valve 8 is in the return state, the automatic booster pump can sense the change of water flow and water pressure and automatically turn on.

[0188] The above are merely exemplary embodiments of the present application and are not intended to limit the protection scope of the present application. The protection scope of the present application is determined by the appended claims.

Claims

1. A self-adjusting water tap, comprising: The faucet body; A water flow channel provided in the faucet body, the water flow channel comprising: a cold water flow channel, a hot water flow channel, and a confluence water channel communicating with the water outlet end of the cold water flow channel and the water outlet end of the hot water flow channel; A cold water interface (1) provided at the water inlet end of the cold water flow channel, A hot water interface (2) provided at the water inlet end of the hot water flow channel, A water outlet (4) provided at the water outlet end of the confluence waterway, a flow valve (18) provided on the confluence waterway, and A water regulating switch (6) connected to the flow valve; Characterized in that the faucet also includes: A switch sensor (12) connected to the water regulating switch (6) for detecting the working state of the water regulating switch; A water return interface (3) for connecting to a water return pipe; A water control valve (8) is arranged on the water flow channel, the water control valve (8) comprising a fixed valve body (801) and a movable valve body (802) arranged close to the downstream side of the fixed valve body and capable of rotating around a rotation axis (m), the fixed valve body (801) having through-holes: a first cold water hole (801a) located on the cold water flow channel, a first hot water hole (801b) located on the hot water flow channel, which is in communication with the return water interface (3), and the hole axis is aligned with the return water interface (3). The movable valve body (802) is provided with a second cold water hole (802a) and a second hot water hole (802b) extending therethrough, and a return water drainage groove (802c) is provided on the side of the movable valve body (802) that is close to the fixed valve body (801) and is recessed inwards, separated from the second cold water hole (802a) and the second hot water hole (802b), and communicated with the return water hole (801c); the first The cold water hole (801a), the second cold water hole (802a), the first hot water hole (801b) and the second hot water hole (802b) are all arc-shaped long strip holes extending around the rotation axis (m); the return water drainage groove (802c) is a strip groove extending along the radial direction of the return water hole (801c), and has a first end and a second end at both ends in the length direction. The first end of the return water drainage groove (802c) is located at the return water hole (80 1c), the distance between the first cold water hole (801a) and the water return hole (801c) = the distance between the second cold water hole (802a) and the water return hole (801c) > the distance between the second end of the water return drainage groove (802c) and the water return hole (801c) ≥ the distance between the first hot water hole (801b) and the water return hole (801c) = the distance between the second hot water hole (802b) and the water return hole (801c); a first motor connected to the movable valve body (802) for driving the movable valve body (802) to rotate around the rotation axis (m); a first water temperature sensor provided on the hot water flow channel between the hot water interface (2) and the first hot water hole (801b); a second water temperature sensor disposed on the confluence waterway; a temperature setting module; and A processor (16) is respectively connected to the first motor, the switch sensor, the first water temperature sensor, the second water temperature sensor and the temperature setting module circuit.

2. The self-adjusting water tap according to claim 1, characterized in that: The distance between the first cold water hole (801a) and the first hot water hole (801b) in the circumferential direction around the axis of the return water hole (801c) is ≠ the distance between the second cold water hole (802a) and the second hot water hole (802b) in the circumferential direction around the axis of the return water hole (801c).

3. The self-adjusting water tap according to claim 1, characterized in that: The faucet also includes a second motor connected to the flow valve (18) to drive the flow valve (18) to be in different working states, and the second motor is connected to the processor (16) circuit.

4. The self-adjusting water tap according to claim 3, characterized in that: The water regulating switch (6) is a rotary water regulating switch; The switch sensor (12) comprises: a contact switch (1201) physically matched with the water adjustment switch (6) and connected to the circuit of the processor (16) to detect whether the water adjustment switch (6) is turned on and off, and A potentiometer (1202) is physically matched with the water adjustment switch (6) and is connected to the circuit of the processor (16) to detect the rotation angle of the water adjustment switch (6).

5. The self-adjusting water tap according to claim 1, characterized in that: The faucet also includes a temperature display module connected to the processor (16) circuit for displaying the sensed temperature of the second water temperature sensor.

6. The self-adjusting water tap according to claim 1, characterized in that: The temperature display module and the temperature setting module are integrated on a touch display (15) fixed to the faucet body.

7. A water supply system comprising: A faucet (100) with a hot water connection and a cold water connection, a tap water pipe (20) connected to the cold water interface, and A hot water tank (19) connected to the hot water interface via a hot water supply pipe (21); It is characterized in that the faucet (100) is a self-temperature regulating faucet as described in any one of claims 1 to 6, and the hot water tank (19) is also connected to the return water interface (3) through a return water pipe (22).

8. The water supply system according to claim 7, characterized in that: The water return pipe (22) or the hot water supply pipe (21) is provided with a water pump (23) which is connected to the water temperature sensor (11) and the switch sensor (12) in an electrical circuit.

9. The water supply system according to claim 7, characterized in that: The water return pipe (22) or the hot water supply pipe (21) is provided with an automatic booster pump.

10. A control method for a self-adjusting thermostatic faucet according to any one of claims 1 to 6, characterized in that: When the switch sensor (12) transmits a signal to the processor indicating that the water adjustment switch (6) is in an on state, as detected by the switch sensor (12): If the processor (16) receives a first sensed water temperature transmitted by the first water temperature sensor that is lower than the set temperature, the processor (16) sends a control signal to the first motor, causing the first motor to drive the movable valve body (802) to rotate to the second position, at which time the return water diversion groove (802c) connects the first hot water hole (801b) with the return water hole (801c), and the movable valve body (802) blocks the first cold water hole (801a) and the first hot water hole (801b) at the same time; If the first sensed water temperature transmitted by the first water temperature sensor received by the processor (16) reaches the set temperature, and the first sensed water temperature is greater than the target temperature transmitted by the temperature setting module received by the processor (16) and greater than the second sensed water temperature transmitted by the second water temperature sensor received by the processor (16), the processor (16) sends a control signal to the first motor, so that the first motor drives the movable valve body (802) to rotate to the third position, at which time the return water diversion groove (802c) is isolated from the first hot water hole (801b) and the first cold water hole (801a), the second cold water hole (802a) is connected to the first cold water hole (801a), and the second hot water hole (802b) is connected to the first hot water hole (801b), and the ratio of the connection area between the second hot water hole (802b) and the first hot water hole (801b) to the connection area between the second cold water hole (802a) and the first cold water hole (801a) is positively correlated with the difference between the target temperature and the second sensed temperature.

Images