A platform water mixing device capable of utilizing pre-bath cold water

Abstract

This utility model discloses a platform-type mixing device capable of utilizing pre-shower cold water, including a water tank, a water distribution component, and a backflow component. The water tank is fixed to the mixing valve on the wall. The water distribution component includes a water distribution body and a driving structure. The water distribution body has a water distribution chamber, an inlet channel, a first outlet channel, and a second outlet channel. The inlet of the inlet channel is connected to the lower outlet of the mixing valve. A valve stem is fitted with a clearance fit in the first outlet channel. A sealing head is provided in the water distribution chamber, and the sealing head is connected to one end of the valve stem. The driving structure drives the valve stem to move, so that the sealing head blocks the inlet of the first outlet channel or the inlet of the second outlet channel. The backflow component includes a venturi tube and a suction pipe. The inlet of the venturi tube is connected to the outlet of the second outlet channel, and the outlet of the venturi tube is connected to the shower head. One end of the suction pipe is connected to the suction port of the venturi tube, and the other end leads to the bottom of the water tank. This utility model allows for the immediate use of pre-shower cold water, reducing water waste.

Description

Technical Field

[0001] This utility model relates to the field of bathroom technology, specifically to a platform-type mixing device that can utilize cold water before bathing. Background Technology

[0002] Traditional shower units typically include cold water pipes, hot water pipes, a spray pipe, and a shower head. The cold and hot water pipes are connected to the inlet of the spray pipe via a mixing valve, and the outlet of the spray pipe is connected to the shower head. With increasing emphasis on aesthetics, platform shower units, featuring a shelf on top, are popular due to their attractive appearance and added storage space. While their shape has changed, their performance remains largely the same as traditional shower units.

[0003] Both traditional and platform showers present the problem of wasting cold water before showering. When the hot water is first turned on, the water in the gas water heater and wall pipes is still cold, resulting in a period of time where cold water sprays from the showerhead, causing discomfort. Most people simply let this cold water run off during the shower, leading to a significant waste of water resources. Utility Model Content

[0004] The purpose of this utility model is to address the problem of wasted cold water before showering by providing a platform-type mixing device that can utilize the cold water before showering. The device can first collect and temporarily store the cold water before showering in a water tank. During the shower, the cold water in the water tank is then returned to the hot water pipe at a set flow rate and sprayed out from the shower head to participate in the shower, thus achieving immediate utilization and reducing water waste.

[0005] This utility model is achieved through the following technical solution: This utility model provides a platform-type mixing device that can utilize pre-bath cold water, including a water tank and a water distribution component and a backflow component disposed therein; the water tank is fixed to the mixing valve on the wall; the water distribution component includes a water distribution body and a driving structure, the water distribution body has a water distribution cavity and an inlet channel, a first outlet channel and a second outlet channel communicating with the water distribution cavity, the inlet of the inlet channel is connected to the lower outlet of the mixing valve; A valve stem is provided in the first water outlet channel with clearance fit, and a sealing head is provided in the water distribution chamber. The sealing head is connected to one end of the valve stem. The driving structure is used to drive the valve stem to move in the first water outlet channel so that the sealing head blocks the inlet of the first water outlet channel or the inlet of the second water outlet channel. The backflow component includes a venturi tube and a suction pipe. The inlet of the venturi tube is connected to the outlet of the second water outlet channel, and the outlet of the venturi tube can be connected to the shower head through a pipe. One end of the suction pipe is connected to the water inlet on the side of the venturi tube, and the other end leads to the bottom of the water tank.

[0006] As a preferred embodiment of this utility model, the driving structure includes a diaphragm driving structure driven by water pressure and a float driving structure driven by buoyancy. The driving structure is connected to the other end of the valve stem and drives the valve stem to move according to the water level change in the water tank.

[0007] As a preferred embodiment of this utility model, the diaphragm drive structure includes a diaphragm, a movable shaft, a pressure cap, and a connecting rod. The diaphragm is sealed and connected to the opening at the bottom of the water tank through the pressure cap. The movable shaft is mounted on the pressure cap and connected to the diaphragm. A return spring is provided between the diaphragm and the pressure cap. The connecting rod is hinged inside the water tank, with one end of the connecting rod hinged to the movable shaft and the other end hinged to the valve stem.

[0008] As a preferred embodiment of this utility model, the float drive structure includes a float plate and a connecting rod. The connecting rod is hinged inside the water tank, with one end of the connecting rod fixedly connected to the float plate and the other end hinged to the valve stem.

[0009] As a preferred embodiment of this utility model, the first water outlet channel and the second water outlet channel are arranged opposite each other along the same axis, and the inlet of the first water outlet channel and the inlet of the second water outlet channel are both conical hole structures, and the sealing head is a double conical surface structure.

[0010] As a preferred embodiment of this utility model, a filter cover is provided at the inlet end of the water suction pipe.

[0011] As a preferred embodiment of this utility model, the water suction pipe is provided with a backflow flow regulating valve.

[0012] As a preferred embodiment of this utility model, the water tank is provided with a water outlet connector, one end of which is connected to the outlet of the venturi tube, and the other end is connected to the shower head through a spray pipe.

[0013] As a preferred embodiment of this utility model, the water tank includes a tank body and a tank cover, and the tank cover is detachably connected to the top of the tank body.

[0014] As a preferred embodiment of this utility model, the top of the water tank is provided with a vent hole.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects: The platform-type mixing device of this utility model has two positions for the sealing head. In the initial state, the sealing head blocks the inlet of the second water outlet channel. After the hot water switch is turned on, the cold water before bathing can flow into the water tank through the inlet of the first water outlet channel for temporary storage. When the water level in the water tank rises to a certain height, the drive structure can drive the valve rod to move in the first water outlet channel, so that the sealing head blocks the inlet of the first water outlet channel. At this time, the water from the mixing valve enters the Venturi tube through the inlet of the second water outlet channel, and enters the shower head through the pipeline from the outlet of the Venturi tube. During the later showering process, the water inlet of the Venturi tube can return the cold water in the water tank to the Venturi tube through the water suction pipe, and spray it out from the shower head together with the hot water from the water heater to participate in the shower. This enables the immediate use of the cold water before bathing, realizes the zero cold water function, and helps to reduce the waste of water resources. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the exemplary embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a front view schematic diagram of the internal structure of the platform-type mixing device in this utility model; Figure 2 A top view of the platform-type mixing device of this utility model with the tank cover open; Figure 3 This is a schematic diagram of the platform-type mixing device in the shower state of this utility model; Figure 4 This is a schematic diagram of the main water distribution structure in this utility model; Figure 5 This is a schematic diagram of the float drive structure in this utility model; Figure 6 This is a schematic diagram of the float drive structure of this utility model during showering.

[0017] The attached diagram shows the markings and corresponding component names: 1-Water tank, 2-Mixing valve, 21-Hot water interface, 22-Cold water interface, 23-Hot water knob, 24-Cold water knob, 25-Top spray interface, 26-Top spray knob, 3-Water distribution body, 31-Water distribution chamber, 32-Inlet channel, 33-First outlet channel, 34-Second outlet channel, 4-Valve stem, 5-Sealing head, 61-Venturi tube, 62-Suction pipe, 63-Filter cover, 64-Backflow flow regulating valve, 71-Diaphragm, 72-Moving shaft, 73-Pressure cap, 74-Connecting rod, 75-Reset spring, 81-Float plate, 82-Connecting rod, 91-Outlet connector, 92-Spray pipe, 93-Shower head. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0020] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0023] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0024] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces), unless otherwise explicitly specified.

[0025] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0026] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0027] Please refer to Figures 1 to 6 The present application provides a platform-type mixing device that can utilize pre-bath cold water, including a water tank 1 and a water distribution component and a backflow component disposed therein; the water tank 1 is fixed to a mixing valve 2 on the wall; the water distribution component includes a water distribution body 3 and a driving structure, the water distribution body 3 has a water distribution cavity 31 and an inlet channel 32, a first outlet channel 33 and a second outlet channel 34 communicating with the water distribution cavity 31, the inlet of the inlet channel 32 being connected to the lower outlet of the mixing valve 2; A valve stem 4 is provided in the first water outlet channel 33 with clearance fit, and a sealing head 5 is provided in the water distribution chamber 31. The sealing head 5 is connected to one end of the valve stem 4. The driving structure is used to drive the valve stem 4 to move in the first water outlet channel 33 so that the sealing head 5 blocks the inlet of the first water outlet channel 33 or the inlet of the second water outlet channel 34. The backflow component includes a venturi tube 61 and a suction pipe 62. The inlet of the venturi tube 61 is connected to the outlet of the second water outlet channel 34, and the outlet of the venturi tube 61 can be connected to the shower head 93 through a pipe. One end of the suction pipe 62 is connected to the water inlet on the side of the venturi tube 61, and the other end leads to the bottom of the water tank 1.

[0028] The platform-type mixing device in this application has two position states for the sealing head 5. In the initial state, the sealing head 5 blocks the inlet of the second water outlet channel 34. After the hot water switch is turned on, the cold water before bathing can flow through the inlet of the first water outlet channel 33 from the gap between the valve stem 4 and the first water outlet channel 33 into the water tank 1 for temporary storage. When the water level in the water tank 1 rises to a certain height, the drive structure can drive the valve stem 4 to move in the first water outlet channel 33, so that the sealing head 5 blocks the inlet of the first water outlet channel 33. At this time, the water from the mixing valve 2 enters the venturi tube 61 through the inlet of the second water outlet channel 34, and enters the shower head 93 through the pipeline from the outlet of the venturi tube 61. During the later showering process, the water inlet of the venturi tube 61 can return the cold water from the water tank 1 to the venturi tube 61 through the water suction pipe 62, and spray it out from the shower head 93 together with the hot water to participate in the bathing. This can realize the immediate use of the cold water before bathing, which is conducive to reducing the waste of water resources.

[0029] It should be noted that the specific structure of the Venturi tube 61 can refer to the existing technology. Since the suction port on its side is located at the throat, when the liquid flows in the Venturi tube 61, the suction port on its side is in a low-pressure state. Therefore, the low pressure of the throat can be used to draw in cold water from the water tank 1 to achieve mixing without additional power.

[0030] It should be noted that in this embodiment, only the hand spray line (connected to shower head 93) has a zero-cold-water function, while the overhead spray line connected to the overhead spray interface 25 on the mixing valve 2 does not have a zero-cold-water function. This is because most users rarely use the overhead spray function; installing an overhead spray is merely for aesthetic purposes. Therefore, even without a zero-cold-water function, the wasted water in the overhead spray line is minimal and negligible. Of course, if it is necessary to use the overhead spray and one does not want to waste the cold water at the front end, one can use the hand spray to empty the cold water tank and then switch to overhead spray output using the overhead spray knob 26.

[0031] According to some embodiments of this application, the driving structure includes a diaphragm driving structure driven by water pressure and a float driving structure driven by buoyancy. The driving structure is connected to the other end of the valve stem 4 and drives the valve stem 4 to move according to the water level change in the water tank 1. Since the sealing head 5 is initially blocked at the inlet of the second water outlet channel 34, after the hot water switch is turned on, the cold water before bathing can enter the water tank 1 through the inlet of the first water outlet channel 33 for temporary storage. When the water level in the water tank 1 rises to a certain height, the diaphragm driving structure driven by water pressure or the float driving structure driven by buoyancy can drive the valve stem 4 to move, causing the sealing head 5 to block the inlet of the first water outlet channel 33, thereby allowing the water from the mixing valve 2 to enter the venturi tube 61 through the inlet of the second water outlet channel 34.

[0032] It should be noted that hot water will gradually reach the mixing valve 2 after the hot water switch has been turned on for a period of time. During this period, the cold water flowing out before bathing is temporarily stored in the water tank 1. Therefore, those skilled in the art can reasonably design the size of the water tank 1 so that the cold water flowing out before bathing during this period forms a certain water level in the water tank 1, so as to use water pressure or buoyancy to make the drive structure move, thereby realizing the drive of the valve stem 4.

[0033] According to some embodiments of this application, the diaphragm drive structure includes a diaphragm 71, a movable shaft 72, a pressure cap 73, and a connecting rod 74. The diaphragm 71 is sealed to the bottom opening of the water tank 1 via the pressure cap 73. The movable shaft 72 passes through the pressure cap 73 and is connected to the diaphragm 71. A return spring 75 is provided between the diaphragm 71 and the pressure cap 73. The connecting rod 74 is hinged inside the water tank 1 (hinge point is O), with one end of the connecting rod 74 hinged to the movable shaft 72 and the other end hinged to the valve stem 4. Figure 1 and Figure 3 As shown, the positions of membrane 71 in different states are displayed.

[0034] The aforementioned diaphragm 71 can be a rubber diaphragm 71, with its edge sealed and fixed to the edge of the bottom opening of the water tank 1 by a pressure cap 73. The movable shaft 72 is vertically slidably mounted on the pressure cap 73, and its middle part is fixedly connected to the diaphragm 71. When the water level in the water tank 1 rises to a certain height, under the action of water pressure, the diaphragm 71 deforms downward and compresses the return spring 75. At the same time, the movable shaft 72 and the connecting rod 74 drive the valve stem 4 to move, causing the sealing head 5 to block the inlet of the first water outlet channel 33, thereby allowing the water from the mixing valve 2 to enter the venturi tube 61 through the inlet of the second water outlet channel 34.

[0035] During showering, once the cold water in tank 1 is exhausted, the Venturi tube 61 will draw in air, achieving the same effect as existing air-injected shower heads 93 on the market, saving over 30% of water and providing a better user experience. It should be noted that after the cold water in tank 1 is exhausted, because the shower continues, the water pressure in the water distribution chamber 31 of the main water distribution unit 3 will exceed the deformation and restoring force of the return spring 75. Therefore, the sealing head 5 will remain blocked at the entrance of the first water outlet channel 33. After the shower ends, since there is no water pressure in the water distribution chamber 31, under the action of the return spring 75, the movable shaft 72 and diaphragm 71 will move upwards, thereby driving the sealing head 5 to block the entrance of the second water outlet channel 34 via the connecting rod 74 and valve stem 4.

[0036] According to some embodiments of this application, the float drive structure includes a float plate 81 and a connecting rod 82. The connecting rod 82 is hinged inside the water tank 1 (the hinge point is point O). One end of the connecting rod 82 is fixedly connected to the float plate 81, and the other end is hinged to the valve stem 4. Figure 5 and Figure 6 As shown, the positions of the float 81 in different states are displayed.

[0037] In the initial state (water tank 1 is empty), under the action of its own weight, the float 81 will block the inlet of the second water outlet channel 34 through the connecting rod 82 and the valve stem 4. After the hot water switch is turned on, the cold water before bathing can flow from the inlet of the first water outlet channel 33 between the valve stem 4 and the first water outlet channel 33 into the water tank 1 for temporary storage. As the water level in the water tank 1 rises, the float 81 moves upward under the action of buoyancy and gradually blocks the inlet of the first water outlet channel 33 through the connecting rod 82 and the valve stem 4. At this time, the water from the mixing valve 2 enters the venturi tube 61 through the inlet of the second water outlet channel 34.

[0038] It should be noted that after the cold water in the water tank 1 is exhausted, since the shower continues, the water pressure in the water distribution chamber 31 of the water distribution body 3 will be greater than the force of the float plate 81's own weight. Therefore, the sealing head 5 will remain blocked at the entrance of the first water outlet channel 33. When the shower ends, since there is no water pressure in the water distribution chamber 31, the float plate 81's own weight will drive the sealing head 5 to block the entrance of the second water outlet channel 34 through the connecting rod 82 and the valve stem 4.

[0039] According to some embodiments of this application, the first water outlet channel 33 and the second water outlet channel 34 are arranged opposite each other along the same axis, and the inlet of the first water outlet channel 33 and the inlet of the second water outlet channel 34 are both conical hole structures, and the sealing head 5 is a double conical surface structure. The sealing head 5 can be made of rubber. Since the sealing parts of the sealing head 5 and the inlets of the first water outlet channel 33 and the second water outlet channel 34 are both conical surface structures, when the valve stem 4 moves with the sealing head 5, even if the valve stem 4 has some radial swing, the sealing head 5 can still form a good sealing effect with the inlet of the first water outlet channel 33 or the inlet of the second water outlet channel 34.

[0040] According to some embodiments of this application, a filter cover 63 is provided at the inlet end of the water suction pipe 62. By providing a filter cover 63 at the inlet end of the water suction pipe 62, the cold water sucked in by the water suction pipe 62 can be filtered, thereby preventing foreign objects or other contaminants from entering the water tank 1 from entering the water suction pipe 62 and causing blockage of components such as the shower head 93.

[0041] According to some embodiments of this application, a backflow regulating valve 64 is provided on the water suction pipe 62. By providing the backflow regulating valve 64 on the water suction pipe 62, the water suction speed can be appropriately adjusted. The aforementioned backflow regulating valve 64 can be a manual ball valve, etc. The main body of the backflow regulating valve 64 can be fixed on the water tank 1, and the operating handle can be located outside the water tank 1. It should be noted that, according to the industry standard for thermostatic mixing valves, the outlet water temperature control accuracy of mainstream high-quality products is ±2℃, which means that people do not have a noticeable feeling of water temperature changes within 2℃. Therefore, the aforementioned backflow regulating valve 64 does not need to be adjusted frequently. The water suction speed can be roughly adjusted according to seasonal temperature changes. When adjusting, it is preferable to ensure that the cold water sucked into the venturi tube 61 does not cause a large temperature change in the hot water temperature.

[0042] According to some embodiments of this application, the water tank 1 is provided with a water outlet connector 91. One end of the water outlet connector 91 is connected to the outlet of the Venturi tube 61, and the other end is connected to the shower head 93 through the spray pipe 92. The water outlet connector 91 can be a right-angle elbow, and the water outlet connector 91 can be fixed to the bottom of the water tank 1.

[0043] According to some embodiments of this application, the water tank 1 includes a tank body and a tank cover, the tank cover being detachably connected to the top of the tank body, which facilitates the installation and replacement of the internal components of the water tank 1. Simultaneously, the top of the water tank 1 is provided with vent holes to maintain pressure balance between the inside of the water tank 1 and the external atmospheric pressure.

[0044] It should be noted that, after installation, the platform-type mixing device in this application has the mixing valve 2 located inside the water tank 1. The hot water inlet 21 and the cold water inlet 22 on the mixing valve 2 extend from the side of the water tank 1 facing the wall and form a seal with the water tank 1 to prevent water leakage from the side of the water tank 1. The aforementioned hot water inlet 21 and cold water inlet 22 are used to connect to the hot water pipes and cold water pipes inside the wall. The water tank 1 has a hot water knob 23 and a cold water knob 24 connected to the mixing valve 2 on the side facing the shower user. By turning the hot water knob 23 and the cold water knob 24, water from the hot water pipes and the cold water pipes can enter the mixing valve 2, and then enter the water inlet channel 32 of the water distribution body 3 through the lower outlet of the mixing valve 2.

[0045] When in use, the hot water switch is turned on, and the cold water before bathing flows into the water tank 1 through the inlet of the first water outlet channel 33 for temporary storage. When the water level in the water tank 1 rises to a certain height, the drive structure moves the valve stem 4, causing the sealing head 5 to block the inlet of the first water outlet channel 33. At this time, the water from the mixing valve 2 enters the venturi tube 61 through the inlet of the second water outlet channel 34, and enters the shower head 93 through the pipeline from the outlet of the venturi tube 61. During the later showering process, the cold water in the water tank 1 will be drawn into the venturi tube 61 and sprayed out from the shower head 93 to participate in the bathing, thereby realizing the immediate use of the cold water before bathing and reducing the waste of water resources.

[0046] During the shower, after the cold water in the water tank 1 is exhausted, the sealing head 5 remains blocked at the entrance of the first water outlet channel 33 due to the water pressure in the water distribution chamber 31 of the main water distribution body 3, as the shower continues. When the shower ends, since there is no water pressure in the water distribution chamber 31, the sealing head 5 blocks the entrance of the second water outlet channel 34 under the action of the driving structure.

[0047] It should be noted that when using this platform-type mixing device, the set temperature of the gas water heater can be 1-2℃ higher than normal to avoid the cold water in water tank 1 flowing back and causing the water temperature from shower head 93 to be too low, thus affecting shower comfort. If the water temperature from shower head 93 feels too high after the cold water in water tank 1 has been completely absorbed, the user can slightly open the cold water switch according to their preference to lower the water temperature from shower head 93.

[0048] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A platform-type water mixing device capable of utilizing pre-bath cold water, characterized by, It includes a water tank and a water distribution component and a backflow component disposed therein; the water tank is fixed to the mixing valve on the wall; the water distribution component includes a water distribution body and a driving structure, the water distribution body has a water distribution cavity and an inlet channel, a first outlet channel and a second outlet channel communicating with the water distribution cavity, and the inlet of the inlet channel is connected to the lower outlet of the mixing valve; A valve stem is provided in the first water outlet channel with clearance fit, and a sealing head is provided in the water distribution chamber. The sealing head is connected to one end of the valve stem. The driving structure is used to drive the valve stem to move in the first water outlet channel so that the sealing head blocks the inlet of the first water outlet channel or the inlet of the second water outlet channel. The backflow component includes a venturi tube and a suction pipe. The inlet of the venturi tube is connected to the outlet of the second water outlet channel, and the outlet of the venturi tube can be connected to the shower head through a pipe. One end of the suction pipe is connected to the water inlet on the side of the venturi tube, and the other end leads to the bottom of the water tank.

2. The platform-type mixing device capable of utilizing pre-bath cold water according to claim 1, characterized in that, The drive structure includes a diaphragm drive structure driven by water pressure and a float drive structure driven by buoyancy. The drive structure is connected to the other end of the valve stem and drives the valve stem to move according to the water level change in the water tank.

3. The platform-type mixing device capable of utilizing pre-bath cold water according to claim 2, characterized in that, The diaphragm drive structure includes a diaphragm, a movable shaft, a pressure cap, and a connecting rod. The diaphragm is sealed to the bottom opening of the water tank through the pressure cap. The movable shaft is mounted on the pressure cap and connected to the diaphragm. A return spring is provided between the diaphragm and the pressure cap. The connecting rod is hinged inside the water tank, with one end of the connecting rod hinged to the movable shaft and the other end hinged to the valve stem.

4. The platform-type mixing device capable of utilizing pre-bath cold water according to claim 2, characterized in that, The float drive structure includes a float plate and a connecting rod. The connecting rod is hinged inside the water tank. One end of the connecting rod is fixedly connected to the float plate, and the other end is hinged to the valve stem.

5. The platform-type mixing device capable of utilizing pre-bath cold water according to claim 1, characterized in that, The first water outlet channel and the second water outlet channel are arranged opposite each other along the same axis, and the inlet of the first water outlet channel and the inlet of the second water outlet channel are both conical hole structures, and the sealing head is a double conical surface structure.

6. The platform-type mixing device capable of utilizing pre-bath cold water according to claim 1, characterized in that, A filter cover is provided at the inlet end of the water suction pipe.

7. The platform-type mixing device capable of utilizing pre-bath cold water according to claim 1, characterized in that, The water suction pipe is equipped with a backflow flow regulating valve.

8. The platform-type mixing device capable of utilizing pre-bath cold water according to claim 1, characterized in that, The water tank is equipped with a water outlet connector. One end of the water outlet connector is connected to the outlet of the Venturi tube, and the other end is connected to the shower head through a spray pipe.

9. The platform-type mixing device capable of utilizing pre-bath cold water according to claim 1, characterized in that, The water tank includes a tank body and a tank cover, and the tank cover is detachably connected to the top of the tank body.

10. The platform-type mixing device capable of utilizing pre-bath cold water according to claim 1, characterized in that, The top of the water tank is equipped with vents.

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