Concealed box

By designing a concealed box containing waterway body and sealed connection, the problem of wall damage caused by buried wall products after water leakage is solved, and a multi-functional adaptation platform is realized, reducing R&D costs and facilitating functional upgrades.

CN119466092APending Publication Date: 2025-02-18XIAMEN LOTA INT CO LTD
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Patent Information

Application Number
CN202411784678.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-06
Publication Date
2025-02-18

AI Technical Summary

Technical Problem

After damage and leakage of buried wall products, the wall will be damaged, and it will be difficult to replace and upgrade the product and function, making it impossible to achieve multi-function adaptation.

Method used

Design a concealed box, including a box that can be placed in the wall, with a water channel body and a water-water joint installed in the box, which is connected to the water-water joint through a sealing gasket to ensure that the water flow can only flow out from the wall opening and through the water channel The platform mode of the ontology is adapted to different functional ontology.

Benefits of technology

Prevent water flow from penetration into the wall, protect the wall, and reduce R&D costs through a multi-function adaptation platform, and facilitate the replacement and upgrading of product functions.

✦ Generated by Eureka AI based on patent content.

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    Figure CN119466092A_ABST
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Abstract

The concealed installation box comprises a box body capable of being arranged in a wall, a shell comprises an outer shell body and an inner shell body which are matched with each other, the outer shell body is close to the wall relative to the inner shell body, a water channel body is arranged in the box body, and a water passing connector is arranged on the peripheral side of the water channel body. The side wall of the box body is provided with an open hole which can be matched with the outer peripheral wall of the water passing connector, the water passing connector can extend out of the box body through the open hole, and a sealing gasket is arranged between the inner peripheral wall of the open hole and the outer peripheral wall of the water passing connector so that the box body can be connected with the water passing connector in a sealed mode; the outer side, close to the wall surface, of the outer shell is provided with an opening, the opening can be matched with the wall surface, water leaked in the box body can only flow out from the opening, and water (water in a non-water-channel body) in the box body can only flow out from the wall surface through the opening and cannot permeate into the wall body to damage the wall body.
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Description

Technical Field

[0001] The invention relates to a concealed box. Background Art

[0002] Embedded wall products refer to bathroom products that need to be embedded in the wall together with the pipes during installation. The advantage is that they can make the overall decoration of the bathroom simpler. The water pipes are all in the wall, and only the water outlet products and control switches are exposed parts. However, there are also some problems, such as: 1. When the product is damaged and leaks, the water will directly penetrate into the wall, damaging the wall, which may cause safety hazards over time; 2. Product replacement requires knocking open the wall for reinstallation, which is very troublesome and requires a large expenditure; 3. The function of the embedded product is fixed, and there is no way to upgrade it directly later. That is, the current embedded products are all single-function mechanisms and cannot achieve multi-functional adaptation. Summary of the invention

[0003] In order to solve the above technical problems, the object of the present invention is to provide a concealed box.

[0004] The present invention is achieved through the following technical solutions:

[0005] A concealed box comprises a box body that can be placed in a wall, the shell comprising an outer shell and an inner shell that match each other, the outer shell being closer to the wall than the inner shell, a water channel body being arranged in the box body, a water pass joint being arranged on the circumference of the water channel body, an opening being arranged on the side wall of the box body that can match with the outer circumference of the water pass joint, the water pass joint being able to extend out of the box body through the opening, a sealing gasket being arranged between the inner circumference of the opening and the outer circumference of the water pass joint so as to seal the box body and the water pass joint; an opening is arranged on the outer side of the outer shell close to the wall, the opening can match with the wall, and water leaking in the box body can only flow out from the opening.

[0006] In an embodiment of the present invention, a first arc-shaped groove is provided on the inner side surface of the outer shell body close to the inner shell body, and a second arc-shaped groove is provided on the outer side surface of the inner shell body close to the outer shell body, and the first arc-shaped groove and the second arc-shaped groove can form the above-mentioned opening, and a first recessed groove is provided on the inner end surface of the outer shell body, and a sealing gasket is provided in the first recessed groove, and a second recessed groove is provided on the outer end surface of the inner shell body, and another sealing gasket is provided in the second recessed groove.

[0007] In an embodiment of the present invention, the sealing gasket includes an arc-shaped piece, the inner periphery of the arc-shaped piece can be sealed and connected to the outer peripheral wall of the water joint, the outer periphery of the arc-shaped piece can be placed in a first sink groove at the first arc-shaped groove, or the outer periphery of the arc-shaped piece can be placed in a second sink groove at the second arc-shaped groove, and the sealing gasket also includes a connecting piece located between adjacent arc-shaped pieces, and the connecting piece and the arc-shaped piece can enable the sealing gasket to form a closed loop.

[0008] In the embodiment of the present invention, the inner end surface of the outer shell is further provided with a first screw mounting hole, the outer end surface of the inner shell is provided with a second screw mounting hole, a screw is provided between the first screw mounting hole and the second screw mounting hole to connect the outer shell and the inner shell together, and a clearance hole that can cooperate with the first screw mounting hole and the second screw mounting hole is provided in the middle of the connecting piece.

[0009] In an embodiment of the present invention, the inner shell is recessed inward to form a watertight recessed portion, the outer shell is formed with a thin wall on the outer side, an installation space is formed inside the thin wall, a first installation boss is provided on the circumference of the outer shell, and a second installation boss is provided on the outer circumference of the inner shell.

[0010] In the embodiment of the present invention, a matching plane is provided in the middle of the water channel body, and a cold water outlet hole, a hot water outlet hole and three water inlet holes are provided on the matching plane. The water transfer joint includes a cold water joint, a hot water joint and three water outlet joints. The cold water joint can be connected to the cold water outlet hole, the hot water joint can be connected to the hot water outlet hole, each water outlet joint can be connected to the corresponding water inlet hole, and five openings are provided on the box body.

[0011] In an embodiment of the present invention, it also includes a functional body arranged in the shell, the functional body is provided with a first mounting plane, the first mounting plane can be connected with the mating plane, a cold water inlet, a hot water inlet and at least two water outlets are provided on the first mounting plane, the cold water inlet can be connected with the cold water outlet, the hot water inlet can be connected with the hot water outlet, and the water outlet can be connected with the corresponding water inlet.

[0012] In an embodiment of the present invention, a test piece is further included, and the test piece is provided with a second mounting plane, and the second mounting plane is capable of being connected to the mating plane. A first water passage and a second water passage are provided on the second mounting plane, and the first water passage can be connected to a cold water outlet and at least one water inlet, and the second water passage can be connected to a hot water outlet and at least one water inlet, and mounting grooves are provided on the peripheries of the first water passage and the second water passage, and a sealing ring is provided in the mounting groove, and the sealing ring is located between the second mounting plane and the mating plane.

[0013] In an embodiment of the present invention, a screw mounting hole is provided on the outer peripheral side of the matching plane, and the screw mounting hole can be connected to a fixing screw provided on the first mounting plane, and the screw mounting hole can also be connected to a positioning column provided on the second mounting plane.

[0014] In the embodiment of the present invention, a bolt connection hole is further provided in the middle of the matching plane, and the bolt connection hole can be connected to a bolt on the test piece.

[0015] A concealed box of the present invention has the following beneficial effects: it ensures that water leaking into the box body can only flow out from the wall through the opening and will not penetrate into the wall to cause damage thereto; at the same time, the water channel body is made into a platform mode, which can be adapted to different functional bodies, so that multiple specifications of product functions share the same platform, reducing the cost of research and development, and also facilitating the replacement and upgrading of product functions by users at a later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the installation of the present invention. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the installation of the present invention. Figure 2 .

[0019] Figure 3 It is an exploded view of the present invention.

[0020] Figure 4 It is a schematic diagram of the outer shell in the present invention.

[0021] Figure 5 It is a schematic diagram of the inner shell in the present invention.

[0022] Figure 6 Schematic diagram of the sealing gasket in the present invention.

[0023] Figure 7 It is a schematic diagram of the waterway body in the present invention.

[0024] Figure 8 It is a schematic diagram of the test piece in the present invention.

[0025] Fig. 9 It is a schematic diagram of the first embodiment of the functional entity in the present invention.

[0026] Fig.10 It is a schematic diagram of the second embodiment of the functional body in the present invention.

[0027] Fig.11 It is an assembly diagram during testing of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] Referring to the drawings of the specification, a concealed box includes a box body 200 that can be placed in a wall 100, the shell includes an outer shell 10 and an inner shell 20 that match each other, the outer shell is close to the wall 110 relative to the inner shell, a water channel body 30 is arranged in the box body, the water channel body is mainly used for passing water, a water pass joint is arranged on the circumference of the water channel body, the side wall of the box body is provided with an opening that can be matched with the outer circumferential wall of the water pass joint, the water pass joint can extend out of the box body through the opening, so that water can be inlet and outlet through a pipe, a sealing gasket 60 is arranged between the inner circumferential wall of the opening and the outer circumferential wall of the water pass joint, so that the box body and the water pass joint are sealed and connected; the outer side of the outer shell is provided with an opening 15 close to the wall, the opening can be matched with the wall, the water leaked in the box body can only flow out from the opening, the box body as a whole forms a sealed inner concave part, the water can only flow out from the opening close to the wall, so that the water cannot penetrate into the wall.

[0034] Furthermore, the outer shell is provided with a first arc groove 11 on the inner side surface close to the inner shell, and the inner shell is provided with a second arc groove 21 on the outer side surface close to the outer shell. The first arc groove and the second arc groove can form the above-mentioned opening for the insertion of the water joint. The inner end surface of the outer shell is provided with a first sink groove 12, and a sealing gasket 60 is provided in the first sink groove. The outer end surface of the inner shell is provided with a second sink groove 22, and another sealing gasket 60 is provided in the second sink groove. There are two sealing gaskets here, and of course there can be only one, so that the following arc-shaped sheet is made into a ring. Preferably, the arc-shaped can be made into a semicircle.

[0035] Referring to the accompanying drawings, the sealing gasket includes an arc-shaped piece 61, the inner periphery of which can be sealed and connected to the outer peripheral wall of the water joint, the outer periphery of which can be placed in the first sink groove at the first arc-shaped groove, or the outer periphery of which can be placed in the second sink groove at the second arc-shaped groove, thus forming a circumferential seal to ensure that water can only flow to the opening, and the sealing gasket also includes a connecting piece 62 located between adjacent arc-shaped pieces, and the connecting piece and the arc-shaped piece can enable the sealing gasket to form a closed loop.

[0036] Furthermore, the inner end surface of the outer shell is also provided with a first screw mounting hole 13, the outer end surface of the inner shell is provided with a second screw mounting hole 23, a screw 70 is provided between the first screw mounting hole and the second screw mounting hole to connect the outer shell and the inner shell together, and a clearance hole 63 that can cooperate with the first screw mounting hole and the second screw mounting hole is provided in the middle of the connecting piece.

[0037] Preferably, the inner shell is recessed inward to form a watertight recessed portion 29, the outer shell outer section is formed with a thin wall 17, an installation space 16 is formed inside the thin wall, a first installation boss 14 is provided on the outer shell periphery, and a second installation boss 24 is provided on the outer shell periphery.

[0038] Furthermore, a matching plane 31 is provided in the middle of the water channel body, and a cold water outlet hole 32, a hot water outlet hole 33 and three water inlet holes 34 are provided on the matching plane. The water flow joint includes a cold water joint 35, a hot water joint 36 and three water outlet joints 37. Each water outlet joint is a water outlet waterway, which can be connected to a shower, a top spray or a spray gun, etc., wherein two water outlet holes are distributed on the left and right, and the three water inlet holes form a triangle, which is compatible with five joints. The cold water joint can be connected to the cold water outlet hole, and the hot water joint can be connected to the hot water outlet hole. Each water outlet joint can be connected to the corresponding water inlet hole, and five openings are provided on the box body.

[0039] Furthermore, it also includes a functional body 50 arranged in the shell, which can mainly be a functional valve core. The functional body is provided with a first installation plane 51, and the first installation plane can be connected with the matching plane to achieve end face sealing, mainly sealing between the corresponding ports and holes. A cold water inlet 52, a hot water inlet 53 and at least two water outlet holes 54 are provided on the first installation plane. The number of water outlet holes determines the function of the valve core. Please refer to the attached drawings, one of which has two water outlet holes and the other has three water outlet holes. The cold water inlet can be connected to the cold water outlet hole, the hot water inlet can be connected to the hot water outlet hole, and the water outlet hole can be connected to the corresponding water inlet hole.

[0040] In one use, it also includes a test piece 40, which is provided with a second installation plane 41, and the second installation plane can be connected to the matching plane. The second installation plane is provided with a first water passage 42 and a second water passage 43, and the first water passage can connect to the cold water outlet and at least one water inlet, and the second water passage can connect to the hot water outlet and at least one water inlet, and one channel can connect to two water inlets and the hot water outlet (or the cold water outlet). The outer periphery of the first water passage and the second water passage is provided with an installation groove 44, and a sealing ring is provided in the installation groove (not drawn in the figure, it is mainly a special-shaped sealing ring to achieve end face sealing), and the sealing ring is located between the second installation plane and the matching plane.

[0041] Furthermore, a screw mounting hole 38 is provided on the outer circumference of the mating plane, and the screw mounting hole can be connected to the fixing screw 55 provided on the first mounting plane, and the screw mounting hole can also be connected to the positioning column 45 provided on the second mounting plane. A bolt connection hole 39 is also provided in the middle of the mating plane, and the bolt connection hole can be connected to the bolt 46 on the test piece.

[0042] More specifically, the present invention is as follows: after the product is installed, the main part is inside the box body; the box body is divided into two upper and lower shells, and the valve body (functional body) is installed between the two shells and sealed by two sealing pads. After the box body is filled with water, there should be no water leakage at the assembly position, that is, the water joint and the opening are sealed by the sealing pad. Through such a design, it is ensured that when the product leaks, the water can pass through the inner wall of the box body and be discharged out of the wall through the opening, ensuring that the water will not penetrate into the wall and protect the wall. The entire product is divided into two parts: the inner wall part serves as a product installation platform, providing cold / hot water inlet and three water outlets (different water outlet modes can be realized). The outer wall functional part is locked with the inner wall part by screws, and can be replaced as a whole, realizing non-destructive upgrading of products matching the same platform and avoiding knocking down the wall for reinstallation. The design of the test piece can flush and seal the initial installation pipeline without disassembly, and flush out the debris remaining in the pipeline. When the real product is in use, the test piece is not installed, and the functional body needs to be installed.

[0043] At the same time, the outer shell includes five first arc grooves 11, a first sunken groove 12 that is sunken all around, a first screw mounting hole 13, a first mounting boss 14, a thin wall and an installation space. The first arc groove is used to cooperate with the arc piece of the sealing gasket to form a seal; the first sunken groove is used to cooperate with the entire annular ring of the sealing gasket to form a circumferential seal; the first screw mounting hole is used to cooperate with the screw for installation so that the two shells are fixed to form a whole; the first mounting boss (also called the reverse mounting boss) is used to provide a mounting boss when the product is installed on the wall so that it can be fixed on the wall. The outer side of the outer shell is open, and the peripheral side wall is a thin-walled feature all around, which is used to form an inner cavity to form a fixed installation space, which is used to provide space for installing the functional body. The inner shell includes: a second arc groove 21, a second recessed groove 22 that is sunken all around, a second screw mounting hole 23, and a second mounting boss (can also be a forward mounting boss) 24; the second arc groove is used to cooperate with the arc piece of the sealing gasket to form a seal; the second groove 22 is used to cooperate with the entire annular ring of the sealing gasket to form a circumferential seal; the second screw mounting hole 23 is used to cooperate with the screws for installation so that the two shells are fixed to form a whole; the second mounting boss 24 is used to provide a mounting boss when the product is installed on the wall so that it can be fixed on the wall. The sealing gasket includes an arc piece and a connecting piece, and the arc piece and the connecting piece form a sealing gasket (ring) that surrounds the entire circumference. The arc piece 11 is used to cooperate with the arc grooves of the outer and inner shells for sealing; the entire sealing gasket can be placed in the two recessed grooves and cooperate with them to form a circumferential seal. The hot water inlet of the main body is used to connect the hot water supply end; the cold water inlet 32 ​​is used to connect the cold water supply end; its hot water outlet is used to provide hot water connection for the functional body; its cold water outlet is used to provide cold water connection for the functional body; its matching plane is used to provide the functional body with an installation and sealing plane, which adopts an end face sealing method; its screw connection hole is used to provide the functional body with an installation locking thread; its bolt connection hole is used to install and fix the test piece. Its water inlet is used to provide a water outlet connection for the functional body; its five water joints (cold water joint, hot water joint and three water outlet joints) are used to connect with external pipes, and the outer periphery of the water joint is used to cooperate with the arc piece of the sealing gasket for sealing. The test piece includes a second installation plane 41, two water channels, positioning feet, and installation grooves. Its second installation plane is used to cooperate with the installation plane 35 of the water channel body; its positioning foot is used to cooperate with the screw connection hole of the water channel body for positioning; its two water passages connect the water inlet and outlet of the water channel body to form a complete passage, so that the water channel is completely connected after installation. Water can be passed through the cold and hot water ends to flush the entire initial water channel or perform a sealing test before leaving the factory. The functional body mainly includes a first installation plane 51, a cold water inlet 52, a hot water inlet 53, at least two water outlet holes 54 and fixing screws 55.Its first mounting plane 50 is installed in coordination with the matching plane of the water channel body; its cold and hot water inlet and outlet holes are coordinated with the corresponding hole features of the water channel body to form a water channel connection, and are locked and fixed with the screw mounting holes of the water channel body through fixing screws. Its functional body is completely independent of the box body itself, installed in the installation space formed by the box body, and can be replaced according to consumer needs.

[0044] The above description shows and describes the preferred embodiments of the present invention. As mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A concealed box, comprising a box body that can be placed in a wall, characterized in that: The shell comprises an outer shell and an inner shell that match each other. The outer shell is close to the wall relative to the inner shell. A water channel body is arranged in the box body. A water flow joint is arranged on the circumferential side of the water channel body. An opening that can be matched with the outer circumferential wall of the water flow joint is arranged on the side wall of the box body. The water flow joint can extend out of the box body through the opening. A sealing gasket is arranged between the inner circumferential wall of the opening and the outer circumferential wall of the water flow joint to ensure a sealed connection between the box body and the water flow joint. An opening is arranged on the outer side of the outer shell close to the wall. The opening can be matched with the wall, and water leaked in the box body can only flow out from the opening.

2. A concealed box according to claim 1, characterized in that: The outer shell is provided with a first arc-shaped groove on the inner side surface close to the inner shell, and the inner shell is provided with a second arc-shaped groove on the outer side surface close to the outer shell. The first arc-shaped groove and the second arc-shaped groove can form the above-mentioned opening. The inner end surface of the outer shell is provided with a first recessed groove, and a sealing gasket is provided in the first recessed groove. The outer end surface of the inner shell is provided with a second recessed groove, and another sealing gasket is provided in the second recessed groove.

3. A concealed box according to claim 2, characterized in that: The sealing gasket includes an arc-shaped piece, the inner periphery of which can be sealed and connected to the outer peripheral wall of the water joint, the outer periphery of which can be placed in a first recessed groove at the first arc-shaped groove, or the outer periphery of which can be placed in a second recessed groove at the second arc-shaped groove, and the sealing gasket also includes a connecting piece located between adjacent arc-shaped pieces, and the connecting piece and the arc-shaped piece can enable the sealing gasket to form a closed loop.

4. A concealed box according to claim 3, characterized in that: The inner end surface of the outer shell is also provided with a first screw mounting hole, and the outer end surface of the inner shell is provided with a second screw mounting hole. Screws are provided between the first screw mounting hole and the second screw mounting hole to connect the outer shell and the inner shell together, and a clearance hole that can cooperate with the first screw mounting hole and the second screw mounting hole is provided in the middle of the connecting piece.

5. A concealed box according to claim 4, characterized in that: The inner shell is recessed inward to form a watertight recessed portion, the outer shell is formed with a thin wall on the outer side, an installation space is formed inside the thin wall, a first installation boss is arranged on the outer side of the outer shell, and a second installation boss is arranged on the outer side of the inner shell.

6. A concealed box according to any one of claims 1 to 5, characterized in that: A matching plane is provided in the middle of the water channel body, and a cold water outlet hole, a hot water outlet hole and three water inlet holes are provided on the matching plane. The water transfer joint includes a cold water joint, a hot water joint and three water outlet joints. The cold water joint can be connected to the cold water outlet hole, the hot water joint can be connected to the hot water outlet hole, each water outlet joint can be connected to the corresponding water inlet hole, and five openings are provided on the box body.

7. A concealed box according to claim 6, characterized in that: It also includes a functional body arranged in the shell, the functional body is provided with a first mounting plane, the first mounting plane can be connected to the matching plane, the first mounting plane is provided with a cold water inlet, a hot water inlet and at least two water outlet holes, the cold water inlet can be connected to the cold water outlet hole, the hot water inlet can be connected to the hot water outlet hole, and the water outlet hole can be connected to the corresponding water inlet hole.

8. A concealed box according to claim 6, characterized in that: It also includes a test piece, which is provided with a second installation plane, and the second installation plane can be connected to the matching plane. The second installation plane is provided with a first water passage and a second water passage, and the first water passage can be connected to the cold water outlet and at least one water inlet, and the second water passage can be connected to the hot water outlet and at least one water inlet. The outer periphery of the first water passage and the second water passage is provided with an installation groove, and a sealing ring is provided in the installation groove, and the sealing ring is located between the second installation plane and the matching plane.

9. A concealed box according to claim 7 or 8, characterized in that: A screw mounting hole is arranged on the outer peripheral side of the matching plane, and the screw mounting hole can be connected with a fixing screw arranged on the first mounting plane, and the screw mounting hole can also be connected with a positioning column arranged on the second mounting plane.

10. A concealed box according to claim 9, characterized in that: A bolt connection hole is also provided in the middle of the matching plane, and the bolt connection hole can be connected with a bolt on the test piece.