A concealed faucet

Abstract

The application discloses a concealed faucet, which comprises a pre-buried box and a valve seat detachably mounted on the pre-buried box; the outer side of the pre-buried box is provided with a water inlet interface and a water outlet interface, and the inner side of the pre-buried box is provided with a resisting top seat, and the resisting top seat is provided with a first resisting top surface; each water inlet through hole or water outlet through hole is located on a corresponding second resisting top surface; when the valve seat is locked and mounted from outside to inside in the pre-buried box, the resisting top force direction between the first resisting top surface and the second resisting top surface is not parallel to the locking and mounting direction of the valve seat from outside to inside. Compared with the prior art, the valve seat and the pre-buried box are separately arranged, so that the valve seat does not need to be knocked when being replaced; and the resisting top force direction of the contact surface between the valve seat and the pre-buried box is not parallel to the mounting direction of the valve seat, so that the resisting top force between the first resisting top surface and the second resisting top surface can be greater than the locking force between the valve seat and the pre-buried box, and the sealing effect between the first resisting top surface and the second resisting top surface around the water inlet through hole or the water outlet through hole is ensured.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a concealed faucet. Background Technology

[0002] The faucet is embedded in the wall, with only the operating handle exposed on the wall surface. It is aesthetically pleasing and does not take up indoor space.

[0003] Existing concealed faucets include integrated concealed faucets and separate-installation faucets. Integrated concealed faucets include models such as CN203229999U – a square installation structure for a concealed faucet, and CN212775732U – a new type of concealed shower structure. In integrated concealed faucets, the valve core mounting seat (also called the valve seat or valve body) is fixedly connected to the inlet and outlet pipes inside the wall, forming a single unit. Once installed, if the valve seat is damaged and needs replacement later, it is necessary to remove the wall surrounding the faucet to replace it, making maintenance very inconvenient.

[0004] As shown in CN202531902U - A pre-embedded integrated module for wall-mounted faucets, split-type concealed faucets have a flow channel on the base (the base (including the pre-embedded box) is connected to the pipes inside the wall and sealed in the wall, requiring the wall to be broken down to separate). The valve seat (valve core mounting seat) is then connected to the flow channel on the base. The advantage is that the valve seat and the functional valve core on it can be upgraded or replaced as needed, and it can be used in conjunction with the existing base (pre-embedded box) fixed to the wall. However, the flow channel design of the base (pre-embedded box) of this type of split-type concealed faucet is complex, making processing very inconvenient. The more complex the flow channel design on the base, the greater the possibility of blockage and damage. This type of split-type concealed faucet also suffers from poor sealing performance. Since the seal between the valve seat and the base relies solely on the tightening force of the screws to press the inlet and outlet faces of the valve seat and base, the sealing performance is prone to deterioration over long-term use.

[0005] In view of this, the applicant conducted in-depth research on the aforementioned deficiencies in the prior art, which led to this case. Summary of the Invention

[0006] The main objective of this invention is to provide a concealed faucet that solves the problems of existing concealed faucets requiring wall demolition for repairs and poor sealing performance after damage.

[0007] To achieve the above objectives, the solution of the present invention is:

[0008] A concealed faucet includes a pre-embedded box and a valve seat detachably mounted on the pre-embedded box; the pre-embedded box has an inlet and an outlet on its outer side, and a support seat is provided inside the pre-embedded box, with a first abutting surface on the support seat; the inlet has an inlet through hole, and the outlet has an outlet through hole, each of the inlet or outlet through hole extending through a corresponding first abutting surface;

[0009] The valve seat is provided with a second abutting surface; the valve seat is also provided with an inlet through hole and an outlet through hole; each inlet through hole or outlet through hole is located on a corresponding second abutting surface; when the valve seat is locked in the embedded box from the outside to the inside, the first abutting surface abuts and seals against the second abutting surface, the inlet through hole is connected to the inlet through hole, the outlet through hole is connected to the outlet through hole, and the direction of the abutting force between the first abutting surface and the second abutting surface is not parallel to the locking installation direction of the valve seat from the outside to the inside.

[0010] Furthermore, the water inlet interface includes a cold water inlet interface and a hot water inlet interface; the water outlet interface includes at least one mixed water outlet interface.

[0011] Furthermore, the valve seat includes a first valve seat body and a second valve seat body. A mixing valve core is installed on the first valve seat body, and a water distribution valve core is installed on the second valve seat body. Both the first and second valve seat bodies are provided with a first abutment surface. The first valve seat body is provided with two inlet holes for cold water and hot water respectively. A connecting channel is provided between the first and second valve seat bodies. The second valve seat body is provided with three second abutment surfaces and three outlet holes for conveying mixed water.

[0012] Furthermore, the first valve seat body and the second valve seat body are integrally connected, and the connecting channel is integrally formed between the first valve seat body and the second valve seat body.

[0013] Furthermore, the first valve seat body and the second valve seat body are separately disposed, and a connecting pipe is disposed between the first valve seat body and the second valve seat body, and the connecting channel is formed in the connecting pipe.

[0014] Furthermore, both ends of the connecting pipe are inserted and sealed onto the first valve seat body and the second valve seat body.

[0015] Furthermore, the valve seat includes a valve seat body for connecting with a functional valve core and a mounting plate connected to the valve seat body; a locking mechanism is provided between the mounting plate and the embedded box.

[0016] Furthermore, the mounting plate is integrally connected to the valve seat body.

[0017] Furthermore, the mounting plate is separately connected to the valve seat body. The mounting plate is provided with a clearance hole for the functional valve core to pass through. The valve seat body has a push-abutment protrusion, and the mounting plate abuts against the push-abutment protrusion along the locking installation direction.

[0018] Furthermore, the locking mechanism includes a screw seat, a locking through hole, and a locking screw; the embedded box is also provided with a screw seat, the mounting plate is provided with a locking through hole, a locking screw is inserted into the locking through hole, and the locking screw is locked and fixed in the screw seat; the embedded box is provided with a nut mounting hole, and a locking nut for connecting with the locking screw is installed in the nut mounting hole.

[0019] Furthermore, a sealing ring is provided on the second abutment surface on the outer periphery of the water inlet or outlet.

[0020] Furthermore, there are at least two opposing first abutment surfaces inside the pre-embedded box, and the two opposing second abutment surfaces on the valve seat are in sealing contact with the two opposing first abutment surfaces respectively; the two opposing first abutment surfaces respectively cancel each other out the two reaction forces on the valve seat in the direction perpendicular to the locking installation direction.

[0021] Furthermore, a fixed seat is provided at the bottom of the pre-embedded box; a supporting seat is also provided on the side of the supporting seat where the two opposing first supporting surfaces are located; when the valve seat and the supporting seat are sealing against each other, the side of the valve seat away from the supporting seat abuts against the fixed seat.

[0022] Furthermore, a first retaining seat is integrally connected to the abutment seat inside the pre-embedded box, and the first retaining seat is located on the rear side of the direction in which the first abutment surface of the abutment seat faces; a second retaining seat is provided on the valve seat, and the second retaining seat is engaged on the rear side of the first retaining seat to resist the rearward positional deformation of the abutment seat caused by being abutted by the valve seat.

[0023] Furthermore, the embedded box is integrally formed using PPR, zinc alloy, or stainless steel materials; the water inlet and outlet interfaces are fused or threaded to the water pipes inside the wall.

[0024] Furthermore, both the inlet and outlet water passages are straight holes.

[0025] Furthermore, the straight hole includes a first inner hole located in the water inlet or water outlet and a second inner hole located in the abutment seat, wherein the inner diameter of the first inner hole is larger than the inner diameter of the second inner hole.

[0026] Furthermore, the first and second abutting surfaces that abut against each other are mutually matching inclined planes, and the acute angle formed by the normal direction of the first abutting surface and the locking installation direction is α, 45°≤α<90°.

[0027] Furthermore, the angle of α is 80°.

[0028] With the above structure, the concealed faucet of the present invention has at least the following beneficial effects:

[0029] 1. During use, the pre-embedded box is pre-installed in the wall, and the inlet and outlet water interfaces are pre-connected to the pipes inside the wall. When installing the valve seat, the valve seat is installed from the outside to the inside. The second abutment surface on the valve seat abuts and seals against the first abutment surface. Since the direction of the abutment force between the first abutment surface and the second abutment surface is not parallel to the locking installation direction of the valve seat from the outside to the inside, as the valve seat is gradually tightened, the sum of the abutment forces between all the first abutment surfaces and the second abutment surface can be greater than the tightening force on the valve seat along the locking installation direction, thereby better sealing the first abutment surface and the second abutment surface.

[0030] Second, since the complex flow channels required by the faucet are all located on the valve seat, and the valve seat is easily disassembled and replaced from the embedded box, even if the valve seat is blocked, it can be easily repaired by replacing the parts. The embedded box of this application only has inlet and outlet interfaces for connecting to the pipes inside the wall, and simple inlet and outlet through holes, such as straight holes, on the inlet and outlet interfaces. The probability of blockage is low, and it is easy to process.

[0031] 3. The valve body has a first valve seat body and a second valve seat body, and different functional valve bodies are installed, such as a mixing valve core and a dividing valve core. The mixed water is delivered to the dividing valve core through the connecting channel. After the dividing valve core controls the water outlet direction, the water flows to the water outlet through the corresponding water outlet through the outlet through hole, and then flows into the pipe inside the wall through the water outlet interface and is discharged through the corresponding water outlet component such as a shower head or flusher.

[0032] Fourth, two opposing first abutment surfaces are provided on the two opposing abutment seats inside the pre-embedded box. When the valve seat is locked in place, the gradually locked valve seat gradually shifts along the locking direction, increasing the reaction force of the first abutment surface on the abutment seat on the second abutment surface on the valve seat. Since the two first abutment surfaces are opposite to each other, the reaction forces of the first abutment surfaces on the valve seat can cancel each other out, allowing the valve seat to be installed more stably between the two opposing first abutment surfaces.

[0033] 5. By setting a first retaining seat on the abutment seat and a second retaining seat on the valve seat, when the first abutment surface abuts against the second abutment surface, the second retaining seat provides a forward supporting force. This supporting force is transmitted to the abutment seat through the second retaining seat, thereby reducing the pressure on the abutment seat and thus reducing the risk of damage to the abutment seat. At the same time, since the positional deformation of the abutment seat is small, the sealing effect between the first abutment surface and the second abutment surface is also guaranteed.

[0034] Compared with the prior art, the present invention separates the valve seat and the pre-embedded box, so there is no need to knock the wall when replacing the valve seat. The present invention also ensures that the direction of the abutting force of the contact surface between the valve seat and the pre-embedded box is not parallel to the installation direction of the valve seat, so that the abutting force between the first abutting surface and the second abutting surface can be greater than the locking force between the valve seat and the pre-embedded box, thus ensuring the sealing effect between the first abutting surface and the second abutting surface around the water inlet or water outlet. Attached Figure Description

[0035] Figure 1 This invention relates to a three-dimensional structural diagram of a concealed faucet.

[0036] Figures 2 to 4 This is a three-dimensional exploded view of the embedded box and valve seat at different angles.

[0037] Figure 5 This is a three-dimensional structural diagram of the embedded box.

[0038] Figure 6 This is a structural diagram of the embedded box from the outside to the inside.

[0039] Figure 7 A schematic diagram of the cross-sectional structure of the first and second abutment surfaces in sealing contact.

[0040] Figure 8 for Figure 7 Force analysis diagram of valve seat in the middle.

[0041] Figure 9 This is a schematic diagram of the cross-sectional structure of the top abutment surface and the second abutment surface in abutment sealing contact when the card holder is present.

[0042] Figure 10 for Figure 9 Force analysis diagram of the valve seat.

[0043] Figure 11 This is a three-dimensional structural diagram of the valve seat.

[0044] Figure 12 This is a structural schematic diagram of the valve seat from the bottom view.

[0045] Figure 13 This is a three-dimensional structural diagram of the valve seat with the functional valve core hidden.

[0046] Figure 14 This is an exploded structural diagram of the mounting plate and valve seat body.

[0047] Figure 15 An exploded view of the present invention with the mounting plate as a separate component.

[0048] Figure 16 A three-dimensional structural diagram of the valve seat when the mounting plate abuts against the abutting boss.

[0049] Figure 17 This is a three-dimensional structural diagram of an embedded box according to another embodiment.

[0050] Figure 18 This is a three-dimensional structural diagram of the first valve seat body and the second valve seat body connected by a connecting pipe.

[0051] Figure 19 An exploded view of an embodiment in which the first valve seat body and the second valve seat body are separately configured.

[0052] Figure 20 This is a three-dimensional exploded structural diagram of another embodiment of the present invention.

[0053] Figure 21 This is a schematic diagram of the cross-sectional structure when the first and second abutment surfaces are arc-shaped.

[0054] In the picture:

[0055] Embedded box 1; Water inlet interface 11; Water inlet through hole 111; First inner hole 112; Second inner hole 113; Water outlet interface 12; Water outlet through hole 121; Abutment 13; First abutment surface 131; Fixing seat 14; First card seat 15;

[0056] Valve seat 2; First valve seat body 21; Second valve seat body 22; Second abutment surface 23; Inlet through hole 231; Outlet through hole 232; Sealing ring 233; Connecting pipe 241; Mounting plate 25; Displacement hole 251; Locking through hole 252; Abutment boss 26; Locking screw 271; Nut mounting hole 273; Second retainer 28;

[0057] Mixing valve core 3; Dividing valve core 4. Detailed Implementation

[0058] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0059] like Figures 1 to 20As shown, this invention relates to a concealed faucet, comprising a pre-embedded box 1 and a valve seat 2 detachably mounted on the pre-embedded box 1; the pre-embedded box 1 is provided with an inlet port 11 and an outlet port 12 on its outer side, and a support seat 13 is provided inside the pre-embedded box 1, with a first support surface 131 on the support seat 13; the inlet port 11 is provided with an inlet through hole 111, and the outlet port 12 is provided with an outlet through hole 121, each of the inlet through hole 111 or the outlet through hole 121 extending through a corresponding first support surface 131;

[0060] The valve seat 2 is provided with a second abutment surface 23; the valve seat 2 is also provided with a water inlet through hole 231 and a water outlet through hole 232; each water inlet through hole 231 or water outlet through hole 232 is located on a corresponding second abutment surface 23; when the valve seat 2 is locked in the embedded box 1 from the outside to the inside, the first abutment surface 131 abuts and seals against the second abutment surface 23, the water inlet through hole 231 is connected to the water inlet through hole 111, and the water outlet through hole 232 is connected to the water outlet through hole 121. The direction of the abutment force between the first abutment surface 131 and the second abutment surface 23 is not parallel to the locking installation direction of the valve seat 2 from the outside to the inside.

[0061] Thus, the concealed faucet of the present invention is used in which the pre-embedded box 1 is pre-installed in the wall and the water inlet 11 and water outlet 12 are pre-connected to the pipes (not shown in the figure) in the wall. When installing the valve seat 2, the valve seat 2 is installed from the outside to the inside. The locking installation direction of the valve seat 2 is the direction in which the valve seat 2 is installed from the outside to the inside perpendicular to the wall. The second abutting surface 23 on the valve seat 2 abuts and seals against the first abutting surface 131. Since the direction of the abutting force between the first abutting surface 131 and the second abutting surface 23 is not parallel to the locking installation direction of the valve seat 2 from the outside to the inside, as the valve seat 2 is gradually tightened, the sum of the abutting forces between all the first abutting surfaces 131 and the second abutting surfaces 23 can be greater than the tightening force on the valve seat 2 along the locking installation direction, thereby better sealing the first abutting surface 131 and the second abutting surface 23.

[0062] Since the complex flow channels required by the faucet are all located on the valve seat 2, and the valve seat 2 is easily disassembled and replaced from the embedded box 1, even if the valve seat 2 is blocked, it can be easily repaired by replacing the parts. The embedded box 1 of this application only has an inlet port 11 and an outlet port 12 that connect to the pipes inside the wall, and simple inlet through holes 111 and outlet through holes 121 are provided on the inlet port 11 and outlet through holes 121. As mentioned, the inlet through holes 111 and outlet through holes 121 are both straight holes, which have a low probability of blockage and are easy to process.

[0063] Preferably, the straight hole includes a first inner hole 112 located within the water inlet 11 or the water outlet 12 and a second inner hole 113 located within the abutment 13, wherein the inner diameter of the first inner hole 112 is larger than the inner diameter of the second inner hole 113. The water inlet 11 and the water outlet 12 are connected to pipes pre-embedded in the wall. Furthermore, the water inlet 11 includes a cold water inlet 11 and a hot water inlet 11; the water outlet 12 includes at least one mixed water outlet 12. The mixed water outlet 12 delivers water to water outlet components such as shower heads through pipes pre-embedded in the wall.

[0064] Preferably, the embedded box is integrally formed from PPR, zinc alloy, or stainless steel; the inlet port 11 and outlet port 12 are fused or threaded to the water pipes in the wall. If the embedded box is made of PPR, its material is similar to that of the water pipes embedded in the wall, resulting in a long service life. When the embedded box 1 begins to fail, the water pipes in the wall will have reached the end of their service life, such as twenty years, at which point a comprehensive inspection of the entire house's piping system will be necessary. During the service life of the embedded box, the valve seat 2 can be easily replaced according to the user's needs. The inlet port 11 and outlet port 12 can also be threaded to the water pipes in the wall.

[0065] Preferably, the valve seat 2 includes a first valve seat body 21 and a second valve seat body 22. A mixing valve core 3 is installed on the first valve seat body 21, and a water distribution valve core 4 is installed on the second valve seat body 22. Both the first valve seat body 21 and the second valve seat body 22 are provided with a first abutment surface 131. The first valve seat body 21 is provided with two inlet holes 231 for cold water and hot water respectively. A connecting channel is provided between the first valve seat body 21 and the second valve seat body 22. The second valve seat body 22 is provided with three second abutment surfaces 23 and three outlet holes 232 for conveying mixed water.

[0066] The valve body has a first valve seat body 21 and a second valve seat body 22. The first valve seat body 21 and the second valve seat body 22 are respectively locked and installed on the pre-embedded box 1, and different functional valve bodies are installed, such as mixing valve core 3 and water distribution valve core 4. Mixed water is delivered to water distribution valve core 4 through the connecting channel. After the water distribution valve core 4 controls the water outlet direction, it flows to the water outlet through hole 232 in the corresponding direction and then flows through the water outlet interface 12 into the pipe in the wall and is discharged through the corresponding water outlet component such as shower head or flusher.

[0067] Preferably, the first valve seat body 21 and the second valve seat body 22 are integrally connected, and the connecting channel is integrally formed between the first valve seat body 21 and the second valve seat body 22. This provides an integral connection between the first valve seat body 21 and the second valve seat body 22, resulting in a very stable structure.

[0068] Preferably, the first valve seat body 21 and the second valve seat body 22 can be separately configured, with a connecting pipe 241 between them, and the connecting channel formed within the connecting pipe 241. This allows the first valve seat body 21 and the second valve seat body 22 to be processed separately, significantly reducing production costs and increasing the yield rate. Preferably, both ends of the connecting pipe 241 are inserted and sealed into the first valve seat body 21 and the second valve seat body 22, thereby connecting them. This eliminates the need for metal materials in the connection portion between the two valve seats 2, further reducing production costs. The connecting pipe 241 can be a flexible hose or a rigid pipe, and its material can be plastic or metal. Before installing the valve seat 2, the first valve seat body 21 and the second valve seat body 22 are connected via the connecting pipe 241, and then the assembled valve seat 2 is installed into the pre-embedded box 1.

[0069] Preferably, the valve seat 2 includes a valve seat body for connecting to the functional valve core and a mounting plate 25 connected to the valve seat body; a locking mechanism is provided between the mounting plate 25 and the pre-embedded box 1. The locking mechanism provides a locking force to the valve seat 2 along the locking direction for secure installation. The functional valve core can be a water distribution valve core 4 or a mixing valve core 3.

[0070] Preferably, the mounting plate 25 is integrally connected to the valve seat body. This integral connection provides a stable structure and eliminates the hassle of assembling the mounting plate 25 to the valve seat body.

[0071] Preferably, the mounting plate 25 is separately connected to the valve seat body. The mounting plate 25 has a clearance hole 251 for the functional valve core to pass through, and the valve seat body has an abutment boss 26. The mounting plate 25 abuts against the abutment boss 26 along the locking installation direction. In this way, the mounting plate 25 and the valve seat body can be made of different materials, such as copper for the valve seat body and stainless steel for the mounting plate 25, saving costs. The mounting plate 25 abuts against the abutment boss 26 to transmit the locking force to the valve seat body.

[0072] Preferably, the locking mechanism includes a locking through hole 252 and a locking screw 271; the embedded box 1 is also provided with a screw seat, the mounting plate 25 is provided with a locking through hole 252, the locking screw 271 passes through the locking through hole 252, and the locking screw 271 is locked and fixed in the screw seat; the embedded box 1 is provided with a nut mounting hole 273, and a locking nut for connecting with the locking screw 271 is installed in the nut mounting hole 273. The locking force generated by the locking screw 271 drives the valve seat 2 to lock, thereby enabling the valve seat 2 to be stably installed in the embedded box 1.

[0073] Preferably, a sealing ring 233 is provided on the second abutment surface 23 on the outer periphery of the water inlet through-hole 231 or the water outlet through-hole 232. By providing the second sealing ring 233, the sealing performance between the second abutment surfaces 23 is further improved, ensuring that the water flow between the water inlet through-hole 231 and the water inlet through-hole 111 or the water outlet through-hole 232 and the water outlet through-hole 121 does not leak out.

[0074] Preferably, there are at least two opposing first abutment surfaces 131 in the pre-embedded box 1, and the two opposing second abutment surfaces 23 on the valve seat 2 are in sealing contact with the two opposing first abutment surfaces 131 respectively; the two opposing first abutment surfaces 131 respectively cancel each other out on the two reaction forces of the valve seat 2 in the direction perpendicular to the locking installation direction.

[0075] The two opposing abutment seats 13 inside the pre-embedded box 1 are provided with two opposing first abutment surfaces 131. When the valve seat 2 is locked in place, the valve seat 2 gradually shifts along the locking direction as it is gradually locked in place. The reaction force of the first abutment surface 131 on the abutment seat 13 on the second abutment surface 23 on the valve seat 2 increases. Since the two first abutment surfaces 131 are opposite to each other, the reaction force of the first abutment surface 131 on the valve seat 2 can cancel each other out, so that the valve seat 2 can be installed more stably between the two opposing first abutment surfaces 131.

[0076] Preferably, a fixed seat 14 is provided at the bottom of the pre-embedded box 1; a supporting seat 13 is also provided on the side of the supporting seat 13 where the two opposing first supporting surfaces 131 are located; when the valve seat 2 abuts against the supporting seat 13 for sealing, the side of the valve seat 2 away from the supporting seat 13 abuts against the fixed seat 14. This ensures that when the supporting seats 13 located on the sides of the two supporting seats 13 make contact with the valve seat 2, the fixed seat 14 can provide support force to the valve seat 2, guaranteeing a sealing contact between the valve seat 2 and the supporting seat 13 located in the middle. Figure 6 As shown, the fixing seat 14 can be set in the middle of the inner cavity of the embedded box 1, and the part of the fixing seat 14 that abuts against the valve seat 2 matches the shape of the valve seat 2. Alternatively, as shown... Figure 17As shown, the fixing seat 14 is set on the pre-embedded box 1 on the opposite side of the abutment seat 13, or it can be set in the form of an inclined plane, so that the valve seat 2 can tightly abut against the abutment seat 13.

[0077] Preferably, a first retaining seat 15 is integrally connected to the abutment seat 13 inside the pre-embedded box 1. The first retaining seat 15 is located on the rear side of the direction in which the first abutment surface 131 of the abutment seat 13 faces. A second retaining seat 28 is provided on the valve seat 2. The second retaining seat 28 is engaged with the rear side of the first retaining seat 15 to resist the rearward positional deformation of the abutment seat 13 caused by being abutted by the valve seat 2. By providing the first retaining seat 15 on the abutment seat 13 and the second retaining seat 28 on the valve seat 2, when the first abutment surface 131 abuts against the second abutment surface 23, the second retaining seat 28 provides a forward supporting force. This supporting force is transmitted to the abutment seat 13 through the second retaining seat 28, thereby reducing the positional deformation of the abutment seat 13 due to pressure and reducing the risk of damage to the abutment seat 13. At the same time, since the positional deformation of the abutment seat 13 is small, the sealing effect between the first abutment surface 131 and the second abutment surface 23 is also guaranteed.

[0078] Preferably, the first abutting surface 131 and the second abutting surface 23 that abut against each other are mutually matching inclined planes, and the acute angle α formed by the normal direction of the first abutting surface 131 and the locking installation direction is 45°≤α<90°. The inclined plane is relative to the locking installation direction. By setting the first abutting surface 131 and the second abutting surface 23 as inclined planes, it is convenient to process the first abutting surface 131 and the second abutting surface 23. When the valve seat 2 is installed, as the valve seat 2 is gradually locked along the locking installation direction, the abutting force between the first abutting surface 131 and the second abutting surface 23 gradually increases. Furthermore, the angle α is 80°.

[0079] The first abutting surface 131 and the second abutting surface 23 are mutually matching arc-shaped surfaces. The direction of the abutting force between the first abutting surface 131 and the second abutting surface 23 is the normal direction of the tangent of the arc-shaped surface. At a certain point, the direction of the abutting force is still not parallel to the locking installation direction. Both the first abutting surface 131 and the second abutting surface 23 have a good sealing effect.

[0080] Compared with the prior art, the present invention separates the valve seat 2 from the pre-embedded box 1, so there is no need to knock down the wall when replacing the valve seat 2. The present invention also ensures that the direction of the abutting force of the contact surface between the valve seat 2 and the pre-embedded box 1 is not parallel to the installation direction of the valve seat 2, so that the abutting force between the first abutting surface 131 and the second abutting surface 23 can be greater than the locking force between the valve seat 2 and the pre-embedded box 1, thus ensuring the sealing effect between the first abutting surface 131 and the second abutting surface 23 around the water inlet hole 111 or the water outlet hole 121.

[0081] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A concealed faucet, characterized in that, It includes a pre-embedded box and a valve seat that can be detachably installed on the pre-embedded box; the pre-embedded box is provided with an inlet port and an outlet port on its outer side, and a support seat is provided inside the pre-embedded box, with a first support surface on the support seat; the inlet port is provided with an inlet through hole, and the outlet port is provided with an outlet through hole, each of the inlet through hole or outlet through hole extending through a corresponding first support surface; The valve seat is provided with a second abutting surface; the valve seat is also provided with an inlet through hole and an outlet through hole; each inlet through hole or outlet through hole is located on a corresponding second abutting surface; when the valve seat is locked in the embedded box from the outside to the inside, the first abutting surface abuts and seals against the second abutting surface, the inlet through hole is connected to the inlet through hole, the outlet through hole is connected to the outlet through hole, and the direction of the abutting force between the first abutting surface and the second abutting surface is not parallel to the locking installation direction of the valve seat from the outside to the inside; The first and second abutting surfaces that abut against each other are mutually matching inclined planes; a sealing ring is provided on the second abutting surface on the outer periphery of the water inlet or water outlet; Both the inlet and outlet water passages are straight holes; The pre-embedded box contains at least two opposing first abutment surfaces, and the two opposing second abutment surfaces on the valve seat are in sealing contact with the two opposing first abutment surfaces respectively; the two opposing first abutment surfaces respectively cancel each other out on the two reaction forces of the valve seat in the direction perpendicular to the locking installation direction; the acute angle between the normal direction of the first abutment surface and the locking installation direction is α, 45°≤α<90°; When in use, the pre-embedded box is pre-installed in the wall and the water inlet and outlet interfaces are pre-connected to the pipes in the wall before the valve seat is installed.

2. A concealed faucet as described in claim 1, characterized in that, The water inlet includes a cold water inlet and a hot water inlet; the water outlet includes at least one mixed water outlet.

3. A concealed faucet as described in claim 2, characterized in that, The valve seat includes a first valve seat body and a second valve seat body. A mixing valve core is installed on the first valve seat body, and a water distribution valve core is installed on the second valve seat body. Both the first and second valve seat bodies are provided with a first abutment surface. The first valve seat body is provided with two inlet holes for cold water and hot water respectively. A connecting channel is provided between the first and second valve seat bodies. The second valve seat body is provided with three second abutment surfaces and three outlet holes for conveying mixed water.

4. A concealed faucet as described in claim 3, characterized in that, The first valve seat body and the second valve seat body are integrally connected, and the connecting channel is integrally formed between the first valve seat body and the second valve seat body.

5. A concealed faucet as described in claim 3, characterized in that, The first valve seat body and the second valve seat body are separately disposed, and a connecting pipe is provided between the first valve seat body and the second valve seat body, and the connecting channel is formed in the connecting pipe.

6. A concealed faucet as described in claim 5, characterized in that, The two ends of the connecting pipe are inserted and sealed onto the first valve seat body and the second valve seat body.

7. A concealed faucet as described in claim 1, characterized in that, The valve seat includes a valve seat body for connecting to a functional valve core and a mounting plate connected to the valve seat body; a locking mechanism is provided between the mounting plate and the embedded box.

8. A concealed faucet as described in claim 7, characterized in that, The mounting plate is integrally connected to the valve seat body.

9. A concealed faucet as described in claim 7, characterized in that, The mounting plate is separately connected to the valve seat body. The mounting plate is provided with a clearance hole for the functional valve core to pass through. The valve seat body has a push-abutment protrusion. The mounting plate abuts against the push-abutment protrusion along the locking installation direction.

10. A concealed faucet as described in claim 7, characterized in that, The locking mechanism includes a locking through hole and a locking screw; the embedded box is also provided with a screw seat, the mounting plate is provided with a locking through hole, a locking screw is inserted into the locking through hole, and the locking screw is locked and fixed in the screw seat; the embedded box is provided with a nut mounting hole, and a locking nut for connecting with the locking screw is installed in the nut mounting hole.

11. A concealed faucet as described in claim 1, characterized in that, The bottom of the pre-embedded box is provided with a fixed seat; a top seat is also provided on the side of the top seat where the two opposing first top surfaces are located; when the valve seat is sealed against the top seat, the side of the valve seat away from the top seat abuts against the fixed seat.

12. A concealed faucet as described in claim 1, characterized in that, The pre-embedded box has a first retaining seat integrally connected to the abutment seat, and the first retaining seat is located on the rear side of the direction in which the first abutment surface of the abutment seat faces; the valve seat has a second retaining seat, and the second retaining seat is engaged on the rear side of the first retaining seat to resist the rearward positional deformation of the abutment seat caused by being abutted by the valve seat.

13. A concealed faucet as described in claim 1, characterized in that, The embedded box is integrally formed using PPR, zinc alloy, or stainless steel materials; the water inlet and outlet interfaces are fused or threaded to the water pipes inside the wall.

14. A concealed faucet as described in claim 1, characterized in that, The straight hole includes a first inner hole located in the water inlet or water outlet and a second inner hole located in the abutment seat, wherein the inner diameter of the first inner hole is larger than the inner diameter of the second inner hole.

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