Cold water pre-bleed valve core and bathroom device

Abstract

The utility model belongs to bathroom device technical field especially relates to a cold water pre -arrangement valve core and bathroom device. It includes: valve body, the accommodating cavity that is formed with along vertical extension in valve body, accommodating cavity is provided with sealing piece B, isolating piece and sealing piece A in turn from top to bottom along vertical in, sealing piece B and isolating piece between form second chamber, isolating piece and sealing piece A between form first chamber, the first water inlet and first water outlet for with first chamber intercommunication and the second water inlet and second water outlet for with second chamber intercommunication are seted up on valve body, centre rod, centre rod can be up and down mobile and is set in sealing piece B, isolating piece and sealing piece A, and is located in accommodating cavity. The valve core adopts pure mechanical structure to realize function switching, not only simplifies integral structure, more effectively reduces manufacturing cost and later period maintenance difficulty, and only through the drive centre rod moves, can realize double waterway interlock with the help of the selective switching of sealing cooperation, operation is very simple.

Description

Technical Field

[0001] This utility model belongs to the technical field of bathroom fixtures, and in particular relates to a cold water pre-drain valve core and a bathroom fixture. Background Technology

[0002] As residents' quality of life improves, the user experience of bathroom scenarios such as showering is receiving increasing attention, with "instant hot water" becoming one of the core indicators for measuring the convenience of a bathroom system. In existing water supply systems for homes and small commercial buildings, to achieve centralized hot water supply, a layout of connecting a single water heater to multiple faucets is usually adopted, which results in a relatively long length of hot water pipes laid between the water heater and the distant faucets.

[0003] After hot water is used up, the remaining hot water in the pipes will gradually cool to room temperature due to natural heat dissipation. The next time the faucet is turned on, the residual cold water in the pipes will flow out first, and the user must wait until the cold water is completely drained before using hot water. This process presents two major problems: First, the user experience is poor, with long waiting times and the need to repeatedly test the water temperature to determine if the cold water has been drained, which is not only time-consuming and laborious but also carries the potential risk of scalding from accidentally touching hot water. Second, water resources are wasted, as some existing faucets lack a water flow blocking design, and during the draining process, the water from the cold water pipes may be discharged simultaneously with the residual cold water from the hot water pipes, causing unnecessary water loss.

[0004] To address the aforementioned issues, existing technologies include cold water drainage techniques, such as the "cooling drainage method and switching valve with cooling drainage function" disclosed in Chinese invention patent CN106931191A. This method includes a valve body, a valve core housed within the valve body, and a temperature sensing module. The valve body has an inlet channel and a first outlet channel and a second outlet channel connected to the inlet channel. The valve body also has a cooling drainage channel connected to the inlet channel, a drain hole connecting the first outlet channel and the cooling drainage channel, and an air intake hole connecting the second outlet channel and the cooling drainage channel. The temperature sensing module is used to open and close the drain hole. During cooling drainage, the valve core closes the first and second outlet channels, and water enters the cooling drainage channel from the inlet channel. The water flow generates suction, drawing the residual cold water in the second outlet channel into the cooling drainage channel through the air intake hole. After passing through the drain hole, the water, along with the residual cold water in the first outlet channel, is discharged from the outlet of the first outlet channel. When the water temperature rises to a predetermined value, the temperature sensing module closes the drain hole, ending the cooling drainage process.

[0005] It is known that the switching valve has a temperature sensing bulb and a matching temperature sensing module installed in the valve body, which results in high product cost and relatively complex structure.

[0006] Based on this, the present invention provides a novel cold water pre-drain valve core and bathroom device to overcome the above-mentioned defects. Utility Model Content

[0007] One objective of this utility model is to provide a cold water pre-drain valve core. This valve core uses a purely mechanical structure to achieve function switching, without the need for complex temperature sensing components or electronic components. This not only simplifies the overall structure but also effectively reduces manufacturing costs and the difficulty of later maintenance. Furthermore, by simply moving the central rod, the dual water circuit interlock can be achieved through selective switching with a sealed fit, making operation extremely simple.

[0008] This utility model adopts the following technical solution: a cold water pre-drainage valve core, comprising:

[0009] The valve body has a vertically extending receiving cavity. Within the receiving cavity, a sealing plate B, an isolating element, and a sealing plate A are arranged vertically from top to bottom. A second chamber is formed between the sealing plate B and the isolating element, and a first chamber is formed between the isolating element and the sealing plate A. The valve body has a first inlet and a first outlet for communicating with the first chamber, and a second inlet and a second outlet for communicating with the second chamber.

[0010] A central rod, which is movable up and down, passes through the sealing sheet B, the spacer and the sealing sheet A, and is located within the receiving cavity;

[0011] The central rod has a first position and a second position;

[0012] When the center rod is in the first position, the end of the center rod is sealed to the sealing sheet B and the isolation member, blocking the connection between the second chamber and the second outlet, and connecting the first inlet, the first chamber and the first outlet in sequence.

[0013] When the center rod moves downward to the second position, the end of the center rod is sealed to the isolator and the sealing plate A, blocking the communication between the first chamber and the first outlet, and releasing the sealing to the sealing plate B, so that the second inlet, the second chamber and the second outlet are connected in sequence.

[0014] Furthermore, a limiting protrusion is formed at the end of the central rod for engaging with the bottom end face of the sealing sheet A or the isolation member.

[0015] Furthermore, the central rod has an annular diameter reduction section in the middle, and the radial dimension of the annular diameter reduction section is smaller than the radial dimension of the bottom of the central rod;

[0016] The inner diameters of the sealing sheet B, the isolator, and the sealing sheet A can all be adapted to the bottom of the central rod to form a sealing fit, and can all form a non-sealing fit with the annular diameter reduction portion.

[0017] When the center rod is in the first position, the sealing piece B is located at the bottom of the center rod; when the center rod is in the second position, the sealing piece B is located at the annular reduced diameter portion of the center rod.

[0018] Furthermore, the cold water pre-drain valve core also includes a button switching assembly, which is disposed on the top of the central rod and is used to drive the central rod to move between a first position and a second position.

[0019] Furthermore, the button switching component has an initial position and a press-locked position;

[0020] When the button switching component is in the initial position, the center rod is in the first position;

[0021] When the button switching component is in the press-locked position, the center rod is in the second position.

[0022] Furthermore, the isolation element includes a first isolation support and a second isolation support fixed vertically from top to bottom within the receiving cavity, and a first sealing element disposed at the connection between the inner wall surfaces of the first isolation support and the second isolation support;

[0023] The first sealing element is in a sealing fit with the central rod;

[0024] The first isolation support and the second isolation support are snap-fitted together.

[0025] Furthermore, the outer walls of the first inlet, the first outlet, the second inlet, and the second outlet are all provided with threaded structures.

[0026] Furthermore, the valve body includes a valve body, and a second inner valve seat and a first inner valve seat that are fixedly disposed vertically from top to bottom within the valve body receiving cavity;

[0027] A second water outlet is provided on the side wall at the top of the second inner valve seat, and the second water outlet is connected to the second water outlet; a second water inlet is provided on the side wall at the bottom of the second inner valve seat that is connected to the first inner valve seat, and the second water inlet is connected to the second water inlet.

[0028] A first water inlet hole is provided on the side wall at the bottom of the first inner valve seat, and the first water inlet hole is connected to the first water outlet; a first water outlet hole is provided at the bottom of the first inner valve seat, and the first water outlet hole is connected to the first water outlet.

[0029] Furthermore, multiple second seals are provided at the connection points between the second inner valve seat, the first inner valve seat, and the valve body.

[0030] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0031] In this utility model, the cold water pre-drain valve core is a two-inlet, two-outlet mechanical valve core. By moving the central rod up and down, the sealing and mating objects are changed, realizing the interlocking switching between the "normal water outlet" and "cold water pre-drain" dual water circuits. The specific process is as follows:

[0032] 1) The center rod is in the first position.

[0033] When the center rod moves to the first position, its end forms a tight seal with the sealing plate B and the isolation element. At the same time, because the center rod is not in a sealing fit with the sealing plate A, the water passage forms a one-way flow.

[0034] First water path opening: External water flows in from the first inlet of the valve body and enters the first chamber between the isolator and the sealing plate A; since the end of the central rod is not sealed with the sealing plate A, the water can flow smoothly through the first chamber and be discharged from the first outlet.

[0035] Second water path blockage: External water flows into the second chamber between the sealing plate B and the isolator from the second inlet; however, because the end of the central rod is sealed with the sealing plate B, the passage between the second chamber and the second outlet is blocked, so no water flows out of the second outlet.

[0036] 2) The center rod is in the second position.

[0037] When the center rod moves downward to the second position, its end forms a tight seal with the isolator and sealing plate A. At the same time, the seal between the center rod and sealing plate B is released, and the water circuit achieves reverse interlocking.

[0038] First waterway blockage: The sealing fit between the end of the central rod and the sealing plate A directly cuts off the connection between the first chamber and the first outlet, blocking the water flow into the first inlet and preventing it from being discharged from the first outlet.

[0039] Second water passage opening: The second inlet connects to external water flow and flows into the second chamber; as the seal between the end of the central rod and the sealing plate B is released, the water flow can be discharged from the second outlet through the second chamber.

[0040] This utility model's cold water pre-drain valve core can pre-drain residual cold water in the hot water pipe during use. Once the cold water is drained, the pre-drain outlet stops discharging water or only drips a small amount, clearly indicating this to the user. During this process, the user does not need to repeatedly test the water temperature, greatly improving the user experience. At the same time, the pre-draining process only discharges residual cold water from the hot water pipe, simultaneously blocking the flow of water in another water path (such as the cold water pipe), effectively avoiding water waste.

[0041] In addition, the valve core adopts a purely mechanical structure to achieve function switching, without the need for complex temperature sensing components or electronic components. This not only simplifies the overall structure but also effectively reduces manufacturing costs and the difficulty of later maintenance. Moreover, by simply moving the central rod, the dual water circuit interlock can be achieved through selective switching of the sealing cooperation, making operation extremely simple.

[0042] The second objective of this utility model is a bathroom device, including the aforementioned cold water pre-drain valve core. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the cold water pre-drainage valve core structure in an embodiment of this utility model;

[0045] Figure 2 for Figure 1 Schematic diagram of the structure after removing the valve body Figure 1 ;

[0046] Figure 3 for Figure 1 Schematic diagram of the structure after removing the valve body Figure 2 ;

[0047] Figure 4 for Figure 1 A schematic diagram of the central rod structure;

[0048] Figure 5 for Figure 2 A schematic diagram of the structure in which the central rod is in the first position;

[0049] Figure 6 for Figure 5 Partial cross-sectional view and diagram illustrating the working principle;

[0050] Figure 7 for Figure 2 A schematic diagram of a structure in which the central rod is in the second position;

[0051] Figure 8 for Figure 7 Partial cross-sectional view and diagram illustrating the working principle;

[0052] The components include: valve body 1, sealing plate B11, isolation element 12, first isolation support 121, second isolation support 122, first sealing element 123, sealing plate A13, second chamber 14, first chamber 15, first inlet 16, first outlet 17, second inlet 18, and second outlet 19; center rod 2, limiting protrusion 20, and annular reduced diameter part 21; button switching assembly 3; valve body 4; second inner valve seat 5, second outlet hole 50, and second inlet hole 51; first inner valve seat 6, first inlet hole 60, and first outlet hole 61; and second sealing element 7. Detailed Implementation

[0053] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0054] The following is in conjunction with the appendix Figure 1 To be continued Figure 8 The present invention will be described in detail with reference to specific embodiments:

[0055] like Figures 1 to 8 As shown, this utility model provides a cold water pre-drainage valve core, which includes:

[0056] The valve body 1 has a vertically extending receiving cavity. Within the receiving cavity, a sealing plate B11, an isolating member 12, and a sealing plate A13 are arranged vertically from top to bottom. A second chamber 14 is formed between the sealing plate B11 and the isolating member 12, and a first chamber 15 is formed between the isolating member 12 and the sealing plate A13. The valve body 1 has a first inlet 16 and a first outlet 17 for communicating with the first chamber 15, and a second inlet 18 and a second outlet 19 for communicating with the second chamber 14.

[0057] The central rod 2 is movable up and down and passes through the sealing sheet B11, the isolation member 12 and the sealing sheet A13, and is located within the receiving cavity;

[0058] The central rod 2 has a first position and a second position;

[0059] When the center rod 2 is in the first position, the end of the center rod 2 is sealed to the sealing sheet B11 and the isolation piece 12, blocking the connection between the second chamber 14 and the second outlet 19, and connecting the first inlet 16, the first chamber 15 and the first outlet 17 in sequence.

[0060] When the center rod 2 moves downward to the second position, the end of the center rod 2 is sealed to the isolation member 12 and the sealing plate A13, blocking the communication between the first chamber 15 and the first outlet 17, and releasing the sealing to the sealing plate B11, so that the second inlet 18, the second chamber 14 and the second outlet 19 are connected in sequence.

[0061] In this utility model, the cold water pre-drain valve core is a two-inlet, two-outlet mechanical valve core. By moving the central rod 2 up and down, the sealing and mating objects are changed, realizing the interlocking switching between the "normal water outlet" and "cold water pre-drain" dual water circuits. The specific process is as follows:

[0062] 1) Center rod 2 is in the first position

[0063] When the center rod 2 moves to the first position, its end forms a tight seal with the sealing plate B11 and the isolation element 12. At the same time, because the center rod 2 does not form a seal with the sealing plate A13, the water passage forms a one-way flow.

[0064] First water path opening: External water flows in from the first inlet 16 of valve body 1 and enters the first chamber 15 between the isolator 12 and the sealing plate A13; since the end of the center rod 2 is not sealed with the sealing plate A13, the water can flow smoothly through the first chamber 15 and be discharged from the first outlet 17.

[0065] Second water path blockage: External water flows from the second inlet 18 into the second chamber 14 between the sealing plate B11 and the isolation member 12; however, because the end of the central rod 2 is sealed with the sealing plate B11, the passage between the second chamber 14 and the second outlet 19 is blocked, so no water flows out of the second outlet 19.

[0066] 2) Center rod 2 is in the second position.

[0067] When the center rod 2 moves downward to the second position, its end forms a tight seal with the isolator 12 and the sealing plate A13. At the same time, the seal between the center rod 2 and the sealing plate B11 is released, and the water circuit achieves reverse interlocking.

[0068] First waterway blockage: The sealing fit between the end of the central rod 2 and the sealing plate A13 directly cuts off the connection between the first chamber 15 and the first outlet 17, and the water flowing into the first inlet 16 is blocked and cannot be discharged from the first outlet 17.

[0069] Second water passage is opened: the second inlet 18 connects to the external water flow and flows into the second chamber 14; as the seal between the end of the central rod and the sealing plate B11 is released, the water flow can be discharged from the second outlet 19 through the second chamber 14.

[0070] It should be noted that, in the present invention, the cold water pre-drain valve core can be used in either the first water channel or the second water channel as a cold water pre-drain passage, and no specific limitation is made in the present invention.

[0071] This utility model's cold water pre-drain valve core can pre-drain residual cold water in the hot water pipe during use. Once the cold water is drained, the pre-drain outlet stops discharging water or only drips a small amount, clearly indicating this to the user. During this process, the user does not need to repeatedly test the water temperature, greatly improving the user experience. At the same time, the pre-draining process only discharges residual cold water from the hot water pipe, simultaneously blocking the flow of water in another water path (such as the cold water pipe), effectively avoiding water waste.

[0072] In addition, the valve core adopts a purely mechanical structure to achieve function switching, without the need for complex temperature sensing components or electronic components. This not only simplifies the overall structure but also effectively reduces manufacturing costs and the difficulty of later maintenance. Moreover, by simply moving the central rod 2, the dual water circuit interlock can be achieved through selective switching of the sealing cooperation, making operation extremely simple.

[0073] Furthermore, in some specific implementations, a limiting protrusion 20 is formed at the end of the central rod 2, which is used to engage with the bottom end face of the sealing sheet A13 or the isolation member 12. The limiting protrusion 20 provides rigid limiting for the first and second positions of the central rod 2 by engaging with the bottom end face of the sealing sheet A13 or the isolation member 12, ensuring that the central rod 2 will not be dislodged from the preset position due to water flow impact, deviation of operating force, or other factors during movement. This ensures that the sealing fit between its end and the isolation member 12 and the sealing sheet A13 is always in the optimal state, avoiding sealing failure and water leakage caused by positional displacement.

[0074] Specifically, when the center rod 2 is in the first position, the end of the center rod 2 is sealed to the sealing sheet B11 and the isolation member 12; when the center rod 2 moves downward to the second position, the end of the center rod 2 is sealed to the isolation member 12 and the sealing sheet A13, and the sealing to the sealing sheet B11 is released.

[0075] In order to achieve the above-mentioned functional effects, in this embodiment, the central rod 2 is provided with an annular diameter reduction section 21 in the middle, and the radial dimension of the annular diameter reduction section 21 is smaller than the radial dimension of the bottom of the central rod 2.

[0076] The inner diameters of the sealing sheet B11, the isolation piece 12, and the sealing sheet A13 can all be adapted to the bottom of the central rod 2 to form a sealing fit, and can all form a non-sealing fit with the annular reduced diameter part 21.

[0077] When the center rod 2 is in the first position, the sealing piece B11 is located at the bottom of the center rod 2; when the center rod 2 is in the second position, the sealing piece B11 is located at the annular reduced diameter portion 21 of the center rod 2.

[0078] Therefore, when the center rod 2 is in the first position, the sealing plate B11 and the isolation plate 12 are sealed to the bottom of the center rod 2. When the center rod 2 moves downward to the second position, the isolation plate 12 and the sealing plate A13 are sealed to the bottom of the center rod 2, and the sealing plate B11 is engaged with the annular reduced diameter portion 21 of the center rod 2, thus releasing the sealing engagement.

[0079] In this utility model, the cold water pre-drain valve core, through the difference in radial dimensions between the annular reduced diameter portion 21 of the central rod 2 and the bottom, combined with the inner diameter design of the sealing plate B11, the isolating member 12, and the sealing plate A13, makes the switching of the sealing state completely dependent on the axial movement of the central rod 2. No additional complex locking or driving structure is required. The "sealing-non-sealing" conversion can be achieved synchronously through "position change", simplifying the sealing switching logic and improving functional reliability.

[0080] Furthermore, in some specific embodiments, the cold water pre-drain valve core also includes a button switching component 3. The button switching component 3 is disposed on the top of the central rod 2 and is used to drive the central rod 2 to move between a first position and a second position. The button switching component 3 adopts an intuitive press-type operation logic. The initial position and the press-lock position precisely correspond to the first position and the second position of the central rod 2, respectively. The user only needs to press once to complete the function switching, without the need for complex adjustments or memorizing operating rules, making the operation simple and convenient.

[0081] In this embodiment, the button switching component 3 has an initial position and a press-lock position.

[0082] Specifically, when the button switching component 3 is in the initial position, the center rod 2 is in the first position; when the button switching component 3 is in the press-lock position, the center rod 2 is in the second position.

[0083] It should be noted that the specific structure and composition of the button switching component 3 are not limited in this utility model, as long as the above functions can be achieved. For example, the transmission principle of the button switching component 3 can be designed with reference to the pressing principle of a ballpoint pen, which is existing technology and will not be described in detail here.

[0084] Furthermore, in some specific embodiments, the isolation member 12 includes a first isolation support 121 and a second isolation support 122 that are fixed vertically from top to bottom within the receiving cavity, and a first sealing member 123 disposed at the connection between the inner wall surfaces of the first isolation support 121 and the second isolation support 122.

[0085] The first sealing element 123 is sealed to the center rod 2; the first isolation support 121 and the second isolation support 122 are snap-fitted together. The first isolation support 121 and the second isolation support 122 are designed as separate units, dividing the overall isolation element 12 into two relatively simple components that can be processed separately, reducing manufacturing difficulty. In this embodiment, the first sealing element 123 can be an elastic element such as an O-ring, which compensates for assembly errors through elastic deformation, ensuring a stable seal when the center rod 2 moves up and down, effectively preventing water leakage between chambers.

[0086] Furthermore, in some specific embodiments, the outer walls of the first inlet 16, the first outlet 17, the second inlet 18, and the second outlet 19 are all provided with threaded structures, which facilitates a stable and detachable connection between each inlet / outlet and the external pipeline.

[0087] Furthermore, in some specific embodiments, the valve body 1 includes a valve body 4, and a second inner valve seat 5 and a first inner valve seat 6, which are fixedly disposed vertically from top to bottom within the receiving cavity of the valve body 4.

[0088] A second water outlet 50 is provided on the side wall at the top of the second inner valve seat 5, and the second water outlet 50 is connected to the second water outlet 19; a second water inlet 51 is provided on the side wall at the bottom of the second inner valve seat 5 that is connected to the first inner valve seat 6, and the second water inlet 51 is connected to the second water inlet 18.

[0089] A first water inlet hole 60 is provided on the side wall at the bottom of the first inner valve seat 6, and the first water inlet hole 60 is connected to the first water inlet 16; a first water outlet hole 61 is provided at the bottom of the first inner valve seat 6, and the first water outlet hole 61 is connected to the first water outlet 17.

[0090] The valve body 4 is designed as a separate unit with the second inner valve seat 5 and the first inner valve seat 6. This design distributes the complex water channels (inlet and outlet) across two inner valve seats, allowing for independent machining and simplifying the structure and manufacturing process. Correspondingly, the second inner valve seat 5 has a separate second outlet 50 (corresponding to the second outlet 19) and a separate second inlet 51 (corresponding to the second inlet 18), while the first inner valve seat 6 has a separate first inlet 60 (corresponding to the first inlet 16) and a separate first outlet 61 (corresponding to the first outlet 17). Furthermore, the separate inner valve seat design allows for targeted replacement when components are damaged. If the channels of a particular inner valve seat are worn, blocked, or the seal fails, only the corresponding inner valve seat needs to be disassembled for repair or replacement, without needing to replace the entire valve body 1, significantly reducing maintenance costs.

[0091] It should be further explained that the cold water pre-drain valve core has structures or sealing elements, such as O-rings, between the various components that need to be sealed to ensure water tightness. This is a common design practice.

[0092] Multiple second sealing elements 7 can be provided at the connection between the second inner valve seat 5, the first inner valve seat 6 and the valve body 4 to ensure sealing. In this embodiment, the second sealing element 7 can be an O-ring.

[0093] In this invention, the cold water pre-drain valve core is a push-button type dual-inlet dual-outlet mechanical valve core. The push-button switching assembly 3 drives the central rod 2 to move axially. Utilizing the structural differences in the central rod 2 and the compatibility with the sealing sheet and isolation element 12, a strict interlocking switching between the "normal water outlet" and "cold water pre-drain" dual water circuits is achieved. Its working principle is based on pure mechanical sealing and water circuit isolation logic. The specific process is as follows:

[0094] 1) When the button switching component 3 is in the initial pop-up state, the center rod 2 is driven to remain in the first position, and the end limiting protrusion 20 is engaged with the bottom surface of the isolation component 12 to achieve rigid positioning. At this time, the cooperation of each component and the water circuit state are as follows:

[0095] Sealing fit relationship: The bottom of the center rod 2 forms a tight seal with the sealing plate B11 and the isolation element 12; Since the center rod 2 does not move downward, its bottom does not contact the sealing plate A13, so it remains in a non-sealing state with the sealing plate A13.

[0096] Water circuit conduction logic: First water circuit conduction: External water flows in from the first inlet 16, enters the first chamber 15 between the isolator 12 and the sealing plate A13 through the first inlet hole 60 of the first inner valve seat 6; since the center rod 2 and the sealing plate A13 are not sealed, the water can flow smoothly through the first chamber 15 and be discharged from the first outlet 17 through the first outlet hole 61 of the first inner valve seat 6.

[0097] Second water path blockage: External water flows in from the second inlet 18 and enters the second chamber 14 between the sealing plate B11 and the isolation member 12 through the second inlet hole 51 of the second inner valve seat 5; however, because the bottom of the center rod 2 is sealed with both the sealing plate B11 and the isolation member 12, the water flow is blocked in the second chamber 14 and cannot be discharged from the second outlet 19 through the second outlet hole 50.

[0098] 2) When the button is pressed to switch component 3 to the locked state, the center rod 2 is driven to move downward to the second position, and the end limit protrusion 20 engages with the bottom surface of the sealing plate A13 to achieve positioning. At this time, the cooperation of each component and the water circuit state are switched in reverse:

[0099] Sealing fit relationship: After the bottom of the center rod 2 moves downward, the sealing piece B11, corresponding to the annular reduced diameter part 21 of the center rod 2, disengages from the sealing fit with the center rod 2 and forms a tight seal only with the isolation piece 12 and the sealing piece A13.

[0100] Water path connection logic: First water path blockage: The sealing fit between the bottom of the center rod 2 and the sealing plate A13 directly cuts off the connection between the first chamber 15 and the first water outlet 61. The water flowing in from the first inlet 16 is blocked in the first chamber 15 and cannot be discharged from the first outlet 17.

[0101] Second water passage is open: water flows into the second chamber 14 from the second inlet 18; because the sealing plate B11 and the annular reduced diameter part 21 of the central rod 2 form a non-sealed structure, the passage between the second chamber 14 and the second outlet 50 is not blocked, and the water can be discharged from the second outlet 19 through the second chamber 14 and the second outlet 50.

[0102] This utility model of a cold water pre-drain valve core is applicable to multi-functional shower stalls and some special applications, which can not only reduce the difficulty of product design and manufacturing, but also reduce the overall cost of the product.

[0103] Based on the aforementioned cold water pre-drain valve core, this utility model also provides a bathroom device including the aforementioned cold water pre-drain valve core. This bathroom device has at least all the advantages of the aforementioned cold water pre-drain valve core, which will not be elaborated here.

[0104] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A cold water pre-drainage valve core, characterized in that, It includes: The valve body has a vertically extending receiving cavity. Within the receiving cavity, a sealing plate B, an isolating element, and a sealing plate A are arranged vertically from top to bottom. A second chamber is formed between the sealing plate B and the isolating element, and a first chamber is formed between the isolating element and the sealing plate A. The valve body has a first inlet and a first outlet for communicating with the first chamber, and a second inlet and a second outlet for communicating with the second chamber. A central rod, which is movable up and down, passes through the sealing sheet B, the spacer and the sealing sheet A, and is located within the receiving cavity; The central rod has a first position and a second position; When the center rod is in the first position, the end of the center rod is sealed to the sealing sheet B and the isolation member, blocking the connection between the second chamber and the second outlet, and connecting the first inlet, the first chamber and the first outlet in sequence. When the center rod moves downward to the second position, the end of the center rod is sealed to the isolator and the sealing plate A, blocking the communication between the first chamber and the first outlet, and releasing the sealing to the sealing plate B, so that the second inlet, the second chamber and the second outlet are connected in sequence.

2. The cold water pre-drainage valve core according to claim 1, characterized in that: The end of the central rod has a limiting protrusion for engaging with the bottom surface of the sealing sheet A or the isolation member.

3. The cold water pre-drainage valve core according to claim 1, characterized in that: The center rod has an annular tapered section in the middle, and the radial dimension of the annular tapered section is smaller than the radial dimension of the bottom of the center rod. The inner diameters of the sealing sheet B, the isolator, and the sealing sheet A can all be adapted to the bottom of the central rod to form a sealing fit, and can all form a non-sealing fit with the annular diameter reduction portion. When the center rod is in the first position, the sealing piece B is located at the bottom of the center rod; when the center rod is in the second position, the sealing piece B is located at the annular reduced diameter portion of the center rod.

4. The cold water pre-drainage valve core according to claim 1, characterized in that: The cold water pre-drain valve core also includes a button switching component, which is disposed on the top of the central rod and is used to drive the central rod to move between a first position and a second position.

5. The cold water pre-drainage valve core according to claim 4, characterized in that: The button switching component has an initial position and a press-locked position; When the button switching component is in the initial position, the center rod is in the first position; When the button switching component is in the press-locked position, the center rod is in the second position.

6. The cold water pre-drainage valve core according to claim 1, characterized in that: The isolation element includes a first isolation support and a second isolation support fixed vertically from top to bottom within the receiving cavity, and a first sealing element disposed at the connection between the inner walls of the first isolation support and the second isolation support; The first sealing element is in a sealing fit with the central rod; The first isolation support and the second isolation support are snap-fitted together.

7. The cold water pre-drainage valve core according to claim 1, characterized in that: The outer walls of the first inlet, the first outlet, the second inlet, and the second outlet are all provided with threaded structures.

8. The cold water pre-drain valve core according to claim 1, characterized in that: The valve body includes a valve body, and a second inner valve seat and a first inner valve seat, which are fixedly disposed vertically from top to bottom within the valve body receiving cavity. A second water outlet is provided on the side wall at the top of the second inner valve seat, and the second water outlet is connected to the second water outlet; a second water inlet is provided on the side wall at the bottom of the second inner valve seat that is connected to the first inner valve seat, and the second water inlet is connected to the second water inlet. A first water inlet hole is provided on the side wall at the bottom of the first inner valve seat, and the first water inlet hole is connected to the first water outlet; a first water outlet hole is provided at the bottom of the first inner valve seat, and the first water outlet hole is connected to the first water outlet.

9. The cold water pre-drainage valve core according to claim 1, characterized in that: Multiple second seals are provided at the connection between the second inner valve seat, the first inner valve seat and the valve body.

10. A bathroom fixture, characterized in that: Includes the cold water pre-drain valve core as described in any one of claims 1 to 9.

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