Water passing main body and concealed water passing device

Abstract

The utility model discloses a water passing main body and a concealed water passing device, the water passing main body comprises a primary injection molding body and a secondary injection molding body which are mutually connected into a whole, the primary injection molding body is provided with at least two pipe bodies which extend in parallel along a first direction and a connecting body which is positioned between the two pipe bodies and extends along a second direction, and the secondary injection molding body is provided with a secondary injection molding body. The second direction intersects with the first direction; a channel communicated with the two pipe bodies is formed in the connecting body; a notch is formed in the side wall of at least one pipe body and right faces the channel in the second direction. The secondary injection molding body wraps the primary injection molding body and seals the notch of the primary injection molding body. According to the water passing main body and the concealed water passing device, the water passing main body wraps the primary injection molding body through the secondary injection molding body, so that mold opening is facilitated, the overall strength is enhanced, and the risk of water leakage is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of bathroom products, and particularly relates to a water passing main body and a concealed water passing device. BACKGROUND

[0002] Conventional concealed water passing main bodies are made of metal to ensure durability and stability, but the manufacturing cost is high. To reduce the cost, the industry has shifted to using plastic. However, plastic waterways have a short board in terms of splicing strength, affecting product performance and reliability. To overcome this problem, the industry uses a one-shot injection molding method to form the plastic valve body. However, when dealing with valve bodies with complex waterway passages, the one-shot injection molding method often causes the wall thickness between adjacent pipe bodies to be too thick and uneven, leading to intensified shrinkage during cooling, thus causing shrink marks or shrinkage holes on the surface, seriously affecting the quality and appearance of plastic molding. Therefore, in actual production, two-shot injection molding has become a more common choice. However, this method is not perfect. Although two-shot injection molding can improve the splicing strength of the plastic valve body to some extent, due to the complexity of the waterway passage, the valve body still needs to be divided into multiple parts for processing. This not only increases the complexity and difficulty of injection molding, but also may cause it difficult to achieve perfect sealing effect at the part joint, increasing the risk of water leakage. The main challenge currently faced is how to effectively implement two-shot injection molding to ensure the splicing strength and sealing performance of the plastic valve body in the face of functional diversification and waterway passage complexity. SUMMARY

[0003] The utility model aims at overcoming the above-mentioned defects or problems existing in the background art, and provides a water passing main body and a concealed water passing device. The water passing main body is covered by a two-shot injection molded body, which facilitates mold opening, enhances the overall strength, and reduces the risk of water leakage.

[0004] To achieve the above-mentioned purpose, the various embodiments of the utility model adopt the following technical solutions but are not limited to the following solutions:

[0005] The first technical solution relates to a water passing main body, which includes a one-shot injection molded body and a two-shot injection molded body connected as one. The one-shot injection molded body is provided with at least two pipe bodies extending in parallel along a first direction, and a connecting body located between the two pipe bodies and extending along a second direction, the second direction intersecting the first direction. A channel is formed in the connecting body and communicates with the two pipe bodies. The side wall of at least one pipe body is formed with a notch, the notch facing the channel along the second direction. The two-shot injection molded body covers the one-shot injection molded body and closes the notch of the one-shot injection molded body.

[0006] The second technical solution is based on the first technical solution, wherein the one-shot injection molded body is provided with three pipe bodies arranged in sequence, two connecting bodies being formed between the adjacent two pipe bodies, and the side wall of each of the two pipe bodies is provided with a notch.

[0007] The third technical solution is based on the second technical solution, wherein the one-time injection body comprises the first pipe body and two second pipe bodies, the two second pipe bodies are arranged adjacent to the first pipe body to form two connecting bodies, and the two connecting bodies are each provided with a channel that is in communication with the first pipe body and the two second pipe bodies; and the side walls of the two second pipe bodies are each provided with a notch.

[0008] The fourth technical solution is based on the first technical solution, wherein the body comprises a cavity and a seat body that are integrated with each other, the seat body is provided with a water inlet path, a mixed water path, and a water outlet path, and the cavity comprises: a thermostatic valve body that is provided with a thermostatic valve cavity that extends in a first direction and is open, to accommodate a thermostatic valve core; the thermostatic valve cavity is provided, close to the bottom in the first direction, with a mixed water outlet that is in communication with the mixed water path; a first protection body that is provided with a first protection cavity that extends in the first direction and is open, to install a first protection assembly; the cavity bottom of the first protection cavity is open and in communication with the water inlet path; a switch valve body that is provided with a switch valve cavity that extends in the first direction and is open, to install a switch valve core; the switch valve cavity is provided with a mixed water inlet that is arranged correspondingly to the mixed water outlet, and the mixed water inlet and the mixed water outlet are in communication through the mixed water path; the cavity bottom of the switch valve cavity is in communication with the water outlet path; the thermostatic valve body is a first pipe body, and the first protection body is a second pipe body; the thermostatic valve body and the first protection body form a one-time injection body; the first protection body is arranged adjacent to the thermostatic valve body and is attached to form a connecting body; a channel in the connecting body is in communication with the thermostatic valve body and the first protection body, and the channel is located at a position upstream of the thermostatic valve cavity in the first direction; the thermostatic valve body is in communication with the water inlet path through the channel; and the body is a two-time injection body.

[0009] The fifth technical solution is based on the fourth technical solution, wherein the body further comprises a second protection body that is provided with a second protection cavity that extends in the first direction and is open, the second protection cavity is located on the mixed water path to install a second protection assembly; and the cavity bottom of the second protection cavity is open and in communication with the mixed water path.

[0010] The sixth technical solution is based on the fifth technical solution, wherein the number of the first protection body, the water inlet path, the switch valve body, the mixed water inlet, and the water outlet path is two, and the two switch valve bodies are respectively located on both sides of the mixed water path; after the mixed water flows out of the mixed water outlet of the thermostatic valve cavity, the mixed water enters the mixed water inlets of the two switch valve cavities along the mixed water path, and then is connected to the two water outlet paths from the cavity bottoms of the two switch valve cavities.

[0011] The seventh technical solution is based on the sixth technical solution, wherein the two water outlet paths and the two water inlet paths are distributed at intervals at the bottom of the body in the first direction.

[0012] The eighth technical solution is based on the sixth technical solution, wherein the inner walls of the thermostatic valve cavity and the switch valve cavity are each provided with an internal thread structure, and the internal thread structure is formed by adding a copper insert during the two-time injection process.

[0013] The ninth technical solution is based on any one of the first to seventh technical solutions, and a concealed water passing device includes the water passing main body, a face cover assembly, a thermostatic valve core, two first protection assemblies, a second protection assembly, and two switch valve cores; the thermostatic valve core is threadedly connected to the thermostatic valve cavity, and the switch valve core is threadedly connected to the switch valve cavity; the first protection assembly and the second protection assembly are respectively in water-tight connection with the first protection cavity and the second protection cavity; the face cover assembly is fixedly connected with the water passing main body and is provided with a thermostatic valve knob connected with the thermostatic valve core and a switch valve knob connected with the switch valve core.

[0014] The tenth technical solution is based on the ninth technical solution, wherein the first protection assembly is a water hammer protection assembly, and the second protection assembly is a freeze crack protection assembly.

[0015] From the above description of various embodiments of the utility model, compared with the prior art, the various embodiments of the utility model have the following beneficial effects:

[0016] In the first technical solution and related embodiments, the water passing main body adopts a two-shot injection molding process, in which the primary injection molding body integrates at least two pipe bodies extending in parallel along a first direction and a connecting body located between them and extending along a second direction intersecting the first direction. The connecting body is internally structured with a passage communicating with the two pipe bodies. In order to optimize the mold core pulling process and solve potential quality problems, a notch is designed on the sidewall of at least one pipe body, which faces the passage along the second direction. First, a structure containing the passage is formed by one-time injection molding, which effectively avoids the problem of excessive and uneven wall thickness between adjacent pipe bodies if directly molded as a whole. The unevenness of the wall thickness is prone to cause surface defects such as shrinkage marks or shrinkage holes during the cooling process, while the two-shot injection molding method ensures the uniformity of the wall thickness by forming the passage first and then building the wall thickness, effectively preventing these quality problems. Second, when designing the primary injection molding body, the challenges of mold core pulling are fully considered. If only a single pipe body and a passage are formed, the stability between the mold core and the primary injection molding body will depend on the side wall sealant, which will generate a lot of pressure during the injection molding process, and the secondary injection molding glue will reseal the passage. However, by integrating another pipe body in the primary injection molding body, the pressure of the pipe body on the end face of the passage prevents the secondary injection molding glue from resealing the passage during the injection molding process, ensuring the smoothness of the passage. Finally, in order to solve the problem of mold core pulling between two adjacent and adhered pipe bodies, a mold opening notch is provided on the sidewall of one of the pipe bodies, which allows the mold to be separated from the primary injection molding body during mold core pulling. During the subsequent secondary injection molding process, these notches are closed by the secondary injection molding material, solving the problem of mold core pulling. At the same time, the primary injection molding body does not include a waterway, which is completed in the secondary injection molding body covering the primary injection molding body, ensuring that its sealing position is not directly related to the primary injection molding body, reducing the risk of water leakage.

[0017] In the second technical solution and related embodiments, the three adjacent pipe bodies form a continuous channel through the two connecting bodies. The three pipe bodies and two connecting bodies are integrated into a one-time injection molding body, which is then completely covered by a two-time injection molding process to form the final water passing main body.

[0018] In the third technical solution and related embodiments, the adjacent layout of the first pipe body and the two second pipe bodies ensures that they can form two connecting bodies and build a channel that communicates with all pipe bodies in these connecting bodies to form a one-time injection molding body. The gap facilitates the core pulling of the waterway mold, and the gap is closed when the two-time injection molding body covers the one-time injection molding body.

[0019] In the fourth technical solution and related embodiments, from the perspective of structural design, the water passing main body integrates multiple functional components such as the thermostatic valve body, the first protective body, and the switch valve body, making the entire structure compact and efficient. This integrated design simplifies the installation and maintenance process, improves the stability and reliability of the system. By using two-time injection molding technology, the manufacturing difficulties brought by complex waterway design are solved. In the one-time injection molding process, the basic structure of the thermostatic valve body and the first protective body is formed, providing a solid foundation for subsequent waterway connection. Two-time injection molding further enhances the stability of these structures, allowing the wall thickness of the thermostatic valve body and the first protective body to be controlled, avoiding quality problems such as shrinkage and shrinkage hole caused by uneven wall thickness. It is worth mentioning that all complex waterways are completed in the two-time injection molding process. In this step, the one-time injection molding body is completely wrapped in the newly injected plastic material, ensuring that the sealing position is not directly related to the one-time injection molding body, but is entirely located in the two-time injection molding body. Such a design greatly reduces the risk of water leakage and improves the overall performance and reliability of the product. From the functional perspective, the water passing main body realizes the constant temperature control of water flow through the thermostatic valve body, effectively protects the incoming water through the first protective body, and controls the mixed water flow through the switch valve body. The coordinated work of these functional components enables the entire system to operate efficiently and stably, meeting users' demands for water temperature, flow, and pressure.

[0020] In the fifth technical solution and related embodiments, the addition of the second protective body to the water passing main body brings additional water flow protection. The second protective body is internally provided with a second protective cavity extending in the first direction, which is located on the mixed waterway and used to install the second protective component. This design allows the water flow to be further protected by the second protective component during its passage through the mixed waterway to the outlet waterway.

[0021] In the sixth technical solution and related embodiments, by equipping the water passing main body with two switch valve bodies, two mixed water inlets, and two outlet waterways, water flow is split and independently controlled.

[0022] In the seventh technical solution and related embodiments, the positions of the water outlet path and the water inlet path are reasonably arranged to optimize the space utilization and improve the overall aesthetics and practicality of the water passing main body. The water outlet path and the water inlet path are spaced apart along the bottom of the first direction of the main body to avoid direct interference between them and ensure smooth flow of water.

[0023] In the eighth technical solution and related embodiments, the inner thread structure is added to the inner wall to facilitate the assembly and maintenance of the water passing main body. The inner thread structure can tightly cooperate with the corresponding valve core outer thread component to ensure that they are stably installed in the valve cavity and are not easy to loosen or leak. In the process of secondary injection molding, a copper insert is added to the injection mold, and the copper insert is combined with the injection material during the injection molding process, thereby forming an inner thread structure with enhanced thread strength in the thermostatic valve cavity and the on-off valve cavity.

[0024] In the ninth technical solution and related embodiments, the concealed water passing device integrates the thermostatic control and double on-off valve core design to meet the demand for complex water path control while maintaining the compactness of the structure, facilitating installation and use. The face cover assembly is fixedly connected with the water passing main body and is provided with a thermostatic valve knob and an on-off valve knob, allowing users to conveniently control the water temperature and flow.

[0025] In the tenth technical solution and related embodiments, the water hammer protection assembly can effectively absorb and alleviate the pressure impact (i.e., water hammer effect) caused by sudden closing or opening of the water flow, preventing pipe rupture or damage to the water passing main body. The freeze protection assembly can provide additional insulation and protection in low temperature environments to prevent water pipes or water passing main bodies from expanding and rupturing due to ice formation. By integrating these two protection assemblies, the concealed water passing device not only runs stably under normal conditions, but also provides additional protection in abnormal or extreme conditions, improving the reliability and safety of the entire device. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 The secondary injection molding exploded view of the water passing main body of the embodiment;

[0028] Figure 2 The structure schematic view of the water passing main body of the embodiment;

[0029] Figure 3 The sectional view of the water passing main body of the embodiment;

[0030] Figure 4 Decomposition schematic view of the concealed water passing device for the embodiment;

[0031] Figure 5 Structure schematic view of the concealed water passing device for the embodiment.

[0032] Explanation of main reference signs:

[0033] Body 1; thermostatic valve body 2; first protection body 3; switch valve body 4; second protection body 5; thermostatic valve core 6; first protection assembly 7; switch valve core 8; second protection assembly 9; face cover assembly 10; primary injection molding body 11; copper insert 12; water outlet path 13; water inlet path 14; connecting body 15; thermostatic valve cavity 20; channel 21; mixed water outlet 22; first protection cavity 30; notch 31; switch valve cavity 40; mixed water inlet 41; mixed water path 42; second protection cavity 50; thermostatic valve knob 101; switch valve knob 102. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are preferred embodiments of the present application, and should not be regarded as excluding other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] In the claims, description and above drawings of the present application, unless otherwise explicitly limited, the terms such as "first", "second" or "third" are used only to distinguish different objects, and are not used to describe a specific order.

[0036] In the claims, description and above drawings of the present application, unless otherwise explicitly limited, for the terms of orientation, such as "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation and position relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, so it cannot be understood as limiting the specific protection scope of the present application.

[0037] In the claims, the specification, and the above drawings, unless otherwise specified, the use of the terms "fixedly connected" or "fixedly connected" should be understood as broad, that is, any connection mode between the two without displacement relationship and relative rotation relationship, that is, it includes non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0038] In the claims, the specification, and the above drawings, unless otherwise specified, the use of the terms "including", "having" and their variants is intended to mean "including but not limited to".

[0039] In this embodiment, in order to combine the drawings, and also for the convenience of introduction, as shown in Figure 1 and Figure 2 The first direction X is defined as the direction from the bottom to the top, and the second direction Y is perpendicular to the first direction X.

[0040] Referring to Figures 1 to 5 As shown in Figure 1 A water passing main body includes a primary injection body 11 and a secondary injection body.

[0041] The primary injection body 11 is provided with at least two pipe bodies extending in parallel along the first direction, and a connecting body 15 located between the two pipe bodies and extending along the second direction. The connecting body 15 forms a channel 21 communicating with the two pipe bodies, ensuring the passage of water flow; the side wall of at least one pipe body is formed with a notch 31, and the notch 31 is opposite to the channel 21 along the second direction, which provides convenience for mold core pulling. The secondary injection body covers the primary injection body 11 and closes the notch 31 of the primary injection body 11, ensuring the integrity of the water passing main body.

[0042] Specifically, the primary injection body 11 is provided with three pipe bodies, which are arranged in sequence and form two connecting bodies 15 between adjacent two pipe bodies, wherein the side walls of the two pipe bodies located on both sides are provided with notches 31 to optimize the mold core pulling during injection molding.

[0043] In this embodiment, the primary injection body 11 includes a first pipe body and two second pipe bodies, the two second pipe bodies are arranged adjacent to the first pipe body to form two connecting bodies 15, and the two connecting bodies 15 are provided with channels 21 respectively communicating with the first pipe body and the two second pipe bodies. The side walls of the two second pipe bodies are provided with notches 31. The adjacent arrangement of the first pipe body and the two second pipe bodies ensures that the two connecting bodies 15 can be formed between them, and the channels 21 communicating with all pipe bodies are constructed in these connecting bodies 15 to form the primary injection body 11, and the notches 31 facilitate the core pulling of the waterway mold, which is closed when the secondary injection body covers the primary injection body 11.

[0044] In this embodiment, the water passing body is manufactured by using a two-step injection molding process. The first injection molded body 11 integrates at least two pipe bodies extending in parallel along a first direction and a connecting body 15 located between the two pipe bodies and extending along a second direction intersecting the first direction. The connecting body 15 is configured with a channel 21 communicating with the two pipe bodies. In order to optimize the mold core pulling process and solve potential quality problems, a notch 31 is designed on the sidewall of at least one pipe body, which is directly opposite to the channel 21 along the second direction. First, the structure containing the channel 21 is formed by the first injection molding, which effectively avoids the problem of excessive and uneven wall thickness between adjacent pipe bodies if directly integrally injection molded. The unevenness of the wall thickness is prone to cause surface defects such as shrinkage marks or shrinkage holes during the cooling process. The two-step injection molding method ensures the uniformity of the wall thickness by forming the channel 21 first and then building the wall thickness, effectively preventing these quality problems. Second, when designing the first injection molded body 11, the challenges of mold core pulling are fully considered. If only a single pipe body and the channel 21 are formed, the stability between the mold core and the first injection molded body 11 will depend on the sidewall sealant, which will generate a large pressure during the injection molding process, and the second injection molded glue will reseal the channel 21. However, by simultaneously integrating another pipe body in the first injection molded body 11, the pressure of the pipe body on the end face of the channel 21 prevents the second injection molded glue from resealing the channel 21 during the injection molding process, ensuring the smoothness of the channel 21. Finally, in order to solve the problem of difficult mold core pulling of the water channel between two adjacent and adhered pipe bodies, the mold opening notch 31 is arranged on the sidewall of one of the pipe bodies, which allows the mold to be separated from the first injection molded body 11 during mold core pulling. During the subsequent second injection molding process, these notches 31 are closed by the second injection molded material, solving the problem of mold core pulling. At the same time, the first injection molded body 11 does not include a water channel, and the water channel is completed during the second injection molded body covering the first injection molded body, ensuring that the sealing position is not directly related to the first injection molded body 11, and reducing the risk of water leakage.

[0045] As shown in Figure 2 , a water passing body includes a two-step injection molded body 1, which includes a cavity and a seat body integrated with each other. The body 1 is manufactured by using a two-step injection molding process, which combines the integrated design of the cavity and the seat body to ensure the firmness and compactness of the structure and improve the aesthetic appearance.

[0046] The seat body, as shown in Figure 2 and Figure 3As shown, it is provided with water inlet path 14, mixed water path 42 and water outlet path 13. Specifically, the number of water inlet path 14 and water outlet path 13 is two, and the water outlet path 13 and the water inlet path 14 are located at the bottom of the body 1 along the first direction. In this embodiment, the seat body is a cylindrical structure, located at the bottom of the body 1 along the first direction, and the water outlet path 13 and the water inlet path 14 are arranged along the circumference of the body 1. Two water inlet paths 14, one of which is cold water, and the other is hot water. Two water outlet paths 13 are connected to handheld shower and top spray respectively. By reasonably arranging the positions of the water outlet path 13 and the water inlet path 14, the space utilization is optimized, and the overall appearance and practicability of the water passing body are improved. The water outlet path 13 and the water inlet path 14 are located at the bottom of the body 1 along the first direction, avoiding direct interference between them, and ensuring smooth flow of water flow.

[0047] The cavity includes thermostatic valve body 2, first protective body 3, second protective body 5 and switch valve body 4.

[0048] The thermostatic valve body 2 is provided with a thermostatic valve cavity 20 extending along the first direction and opening, so as to install a thermostatic valve core 6; the thermostatic valve cavity 20 is provided with a connecting pipe communicating with the water inlet path 14 upstream in the first direction, and a mixed water outlet 22 communicating with the mixed water path 42 near the bottom in the first direction, for outputting mixed water adjusted by the thermostatic valve core 6. Specifically, the number of connecting pipes is two, respectively communicating with two water inlet paths 14. The thermostatic valve core 6 receives cold and hot water through the two water inlet path 14 connecting pipes, and mixes and adjusts to the preset temperature in the valve cavity, and then flows into the mixed water path 42 from the mixed water outlet 22.

[0049] The first protective body 3, as shown in Figure 1 and Figure 3 It is arranged adjacent to the thermostatic valve body 2 and adheres to it, and the first protective body 3 is provided with a first protective cavity 30 extending along the first direction and opening, so as to install a first protective assembly 7 to protect the thermostatic valve body 2; the bottom opening of the first protective cavity 30 communicates with the water inlet path 14, and the first protective cavity 30 communicates with the thermostatic valve cavity 20 through the connecting pipe. In this embodiment, the number of first protective bodies 3 is two, the bottom openings of the two first protective cavities 30 respectively communicate with the two water inlet paths 14, and the two first protective cavities 30 communicate with the thermostatic valve cavity 20 through the two connecting pipes.

[0050] The second protective body 5, as shown in Figure 2 and Figure 3As shown, the second protection cavity 50 is provided on the mixing water path 42 and extends in the first direction, and the second protection cavity 50 is provided for installing the second protection assembly 9; the cavity bottom of the second protection cavity 50 is communicated with the mixing water path 42. The second protection body 5 provides additional water flow protection by installing the second protection assembly 9. The second protection body 5 is internally provided with the second protection cavity 50 extending in the first direction, and the cavity is located on the mixing water path 42 and is used for installing the second protection assembly 9. Such a design enables the water flow to be further protected by the second protection assembly 9 during the process of flowing through the mixing water path 42 to the water outlet path 13. In the embodiment, the number of the second protection body 5 is two.

[0051] The switch valve body 4 is provided with the switch valve cavity 40 extending in the first direction and being open, and the switch valve cavity 40 is used for installing the switch valve core 8; the switch valve cavity 40 is internally provided with the mixing water inlet 41 corresponding to the mixing water outlet 22, the mixing water inlet 41 is communicated with the mixing water outlet 22 through the mixing water path 42, and the cavity bottom of the switch valve cavity 40 is communicated with the water outlet path 13. In the embodiment, the number of the switch valve body 4 is two, and the two switch valve bodies 4 are respectively located on the two sides of the mixing water path 42; the mixing water flows out from the mixing water outlet 22 of the thermostatic valve cavity 20, enters the mixing water inlets 41 of the two switch valve cavities 40 along the mixing water path 42, and then is communicated to the two water outlet paths 13 from the cavity bottoms of the two switch valve cavities 40, respectively. By providing the water flow main body with two switch valve bodies 4, two mixing water inlets 41 and two water outlet paths 13, the water flow is branched and independently controlled.

[0052] In the embodiment, the basic frame of the thermostatic valve body 2, the two first protection bodies 3 and the connecting pipelines therebetween form a primary injection molded body 11. The main structure of the thermostatic valve body 2 is a first pipe body, and the main structure of the two first protection bodies 3 is a second pipe body. The first protection body 3 is arranged adjacent to the thermostatic valve body 2 and is attached to form a connecting body 15. The connecting pipeline that the thermostatic valve cavity 20 is communicated with the water inlet path is a passage 21 of the connecting body 15. The passage 21 is communicated with the thermostatic valve body 2 and the first protection body 3, and the passage 21 is located at a position upstream of the thermostatic valve cavity 20 in the first direction.

[0053] On the basis of the primary injection molded body 11, the switch valve body 4, the second protection body 5 and the seat body are secondarily injection molded and completely wrapped in the primary injection molded body 11, and finally form a secondary injection molded body of the main body 1. At this time, the sealing position of the secondary injection molding is irrelevant to the primary injection molded body 11 outside the thermostatic valve body 2, the two first protection bodies 3 finally formed, and the two passages 21 of the thermostatic valve body 2 are respectively communicated with the two water inlet paths 14 in the seat body.

[0054] The inner walls of the thermostatic valve cavity 20 and the switch valve cavity 40 are provided with internal thread structures. The internal thread structures provide convenience for the assembly and maintenance of the water passing main body. The internal thread structures can tightly cooperate with the corresponding valve core external thread components, ensuring that they are firmly installed in the valve cavities and are not prone to loosening or leakage.

[0055] During the process of secondary injection molding, the internal thread structures in the thermostatic valve cavity 20 and the switch valve cavity 40 are formed by adding the copper insert 12 and combining it with the injection molding. Specifically, the copper insert 12 is first placed in the injection mold, and then the plastic material is injected to tightly combine the copper insert 12 with the plastic material, thereby forming the internal thread structures with enhanced thread strength and durability in the thermostatic valve cavity 20 and the switch valve cavity 40.

[0056] In this embodiment, from the perspective of structural design, the water passing main body highly integrates multiple functional components such as the thermostatic valve body 2, the first protection body 3, and the switch valve body 4, making the overall structure compact and efficient. This integrated design not only simplifies the installation and maintenance process, but also significantly improves the stability and reliability of the system. By using the secondary injection molding technology, the manufacturing difficulties brought by the complex waterway design are solved. In the first injection process, the basic structures of the thermostatic valve body 2 and the first protection body 3 are formed, providing a solid foundation for subsequent waterway connection. The secondary injection molding further enhances the stability of these structures, allowing the wall thickness of the thermostatic valve body 2 and the first protection body 3 to be controlled, avoiding quality problems such as shrinkage and shrinkage hole caused by uneven wall thickness. It is worth mentioning that all complex waterways are completed in the secondary injection molding process. In this step, the first injection body 11 is completely wrapped in the newly injected plastic material, ensuring that the sealing position of the second injection is not directly related to the first injection body 11, but is entirely located in the second injection body. Such a design greatly reduces the risk of water leakage and improves the overall performance and reliability of the product. From the functional perspective, the water passing main body realizes the constant temperature control of water flow through the thermostatic valve body 2, effectively protects the incoming water through the first protection body 3, and controls the mixed water flow through the switch valve body 4. The coordinated work of these functional components enables the entire system to operate efficiently and stably, meeting users' demands for water temperature, flow, and pressure, etc.

[0057] A concealed water passing device, as shown in Figure 4 includes the above-mentioned water passing main body, as well as the face cover assembly 10, the thermostatic valve core 6, two first protection assemblies 7, the second protection assembly 9, and two switch valve cores 8.

[0058] The thermostatic valve core 6 is threadedly connected to the thermostatic valve cavity 20 and is responsible for adjusting the water temperature.

[0059] The switch valve core 8 is threadedly connected to the switch valve cavity 40, respectively, and is responsible for controlling the opening and closing of water flow and the adjustment of flow.

[0060] The first protection assembly 7 and the second protection assembly 9 are water-tightly connected to the first protection cavity 30 and the second protection cavity 50, respectively. Specifically, the first protection assembly 7 is a water hammer protection assembly, and the second protection assembly 9 is a freeze protection assembly. The water hammer protection assembly can effectively absorb and alleviate the pressure impact (i.e., water hammer effect) caused by the sudden closing or opening of water flow, preventing the pipe from being broken or the water passing body from being damaged. The freeze protection assembly can provide additional insulation and protection in a low-temperature environment to prevent the water pipe or the water passing body from expanding and breaking due to freezing. By integrating the two protection assemblies, the concealed water passing device not only can stably operate under normal use conditions, but also can provide additional protection under abnormal or extreme conditions, improving the reliability and safety of the entire device.

[0061] The face cover assembly 10, as shown in Figure 4 and Figure 5 is fixedly connected to the water passing body and is provided with a thermostatic valve knob 101 connected to the thermostatic valve core 6 and a switch valve knob 102 connected to the switch valve core 8, facilitating the user to intuitively operate and adjust the water temperature and control the water flow. In this embodiment, the concealed water passing device integrates the thermostatic control and double switch valve core 8 design, meeting the needs of complex waterway control while maintaining the compactness of the structure, facilitating installation and use. The face cover assembly 10 is fixedly connected to the water passing body and is provided with the thermostatic valve knob 101 and the switch valve knob 102, so that the user can conveniently control the water temperature and the water flow.

[0062] The above description and embodiment of the application are used to explain the scope of protection of the application, but do not constitute a limitation on the scope of protection of the application. Through the inspiration of the application or the above embodiment, those skilled in the art can obtain the modification, equivalent replacement or other improvement of the embodiments of the application or one part of the technical features by combining common knowledge, ordinary technical knowledge in the art and / or existing technology through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the application.

Claims

1. A water-passing body, characterized in that, It includes a primary injection molded body (11) and a secondary injection molded body that are integrally connected to each other. The primary injection molded body (11) has at least two tubes that extend parallel to each other along a first direction, and a connecting body (15) located between the two tubes and extending along a second direction, which intersects with the first direction. A channel (21) communicating with the two tubes is formed in the connecting body (15). At least one of the tubes has a notch (31) formed on its sidewall, which is directly opposite the channel (21) along the second direction. The secondary injection molded body covers the primary injection molded body (11) and closes the notch (31) of the primary injection molded body (11).

2. The water-passing body as described in claim 1, characterized in that, The injection molding body (11) has three tubes arranged in sequence, forming two connecting bodies (15) between two adjacent tubes, wherein the side walls of the two tubes on both sides are provided with notches (31).

3. The water-passing body as described in claim 2, characterized in that, The injection molding body (11) includes a first tube and two second tubes. The two second tubes are arranged adjacent to the first tube to form two connecting bodies (15). Each connecting body (15) has a channel (21) that communicates with the first tube and the two second tubes respectively. The sidewalls of the two second tubes are provided with notches (31).

4. The water-passing body as described in claim 1, characterized in that, The body (1) includes a secondary injection molded body, which comprises a cavity and a seat integrally connected to each other. The seat is provided with a water inlet (14), a water mixing channel (42), and a water outlet (13). The cavity includes: Thermostatic valve body (2) has a thermostatic valve cavity (20) extending in a first direction and open to accommodate thermostatic valve core (6); The thermostatic valve chamber (20) has a mixed water outlet (22) near the bottom in the first direction, which is connected to the mixed water passage (42); the first protective body (3) has a first protective cavity (30) extending in the first direction and open, for installing the first protective component (7); the bottom opening of the first protective cavity (30) is connected to the water inlet passage (14); The valve body (4) has a valve chamber (40) extending in a first direction and open for mounting a valve core (8); the valve chamber (40) has a mixed water inlet (41) corresponding to the mixed water outlet (22), and the mixed water inlet (41) and the mixed water outlet (22) are connected through a mixed water passage (42); the bottom of the valve chamber (40) is connected to the water outlet passage (13); The thermostatic valve body (2) is a first tube, and the first protective body (3) is a second tube; the thermostatic valve body (2) and the first protective body (3) form the primary injection molded body (11); the first protective body (3) is arranged adjacent to the thermostatic valve body (2) and fits together to form the connecting body (15); the channel (21) in the connecting body (15) is connected to the thermostatic valve body (2) and the first protective body (3), and the channel (21) is located upstream of the thermostatic valve cavity (20) in the first direction; the thermostatic valve body (2) is connected to the water inlet (14) through the channel (21); the body (1) is a secondary injection molded body.

5. The water-passing body as described in claim 4, characterized in that, The main body (1) further includes a second protective body (5), which has a second protective cavity (50) extending along a first direction and open. The second protective cavity (50) is located on the mixing water channel (42) to install the second protective component (9). The bottom opening of the second protective cavity (50) is connected to the mixing water channel (42).

6. The water-passing body as described in claim 5, characterized in that, The first protective body (3), the water inlet (14), the switch valve body (4), the mixed water inlet (41) and the water outlet (13) are all in two quantities. The two switch valve bodies (4) are located on both sides of the mixed water path (42). After the mixed water flows out from the mixed water outlet (22) of the thermostatic valve chamber (20), it enters the mixed water inlet (41) of the two switch valve chambers (40) along the mixed water path (42) and is connected to the two water outlets (13) from the bottom of the two switch valve chambers (40).

7. A water-passing body as described in claim 6, characterized in that, The two water outlets (13) and the two water inlets (14) are located at intervals at the bottom of the body (1) along the first direction.

8. A water-passing body as described in claim 6, characterized in that, The inner walls of the thermostatic valve chamber (20) and the switching valve chamber (40) are provided with internal thread structures. The internal thread structures are formed by adding copper inserts (12) and injection molding during the secondary injection molding process.

9. A concealed water-passing device, characterized in that, The system includes a water-passing body as described in any one of claims 1 to 8, a faceplate assembly (10), a thermostatic valve core (6), two first protective components (7), a second protective component (9), and two switch valve cores (8); the thermostatic valve core (6) is threaded to a thermostatic valve chamber (20), and the switch valve core (8) is threaded to a switch valve chamber (40); the first protective component (7) and the second protective component (9) are respectively water-sealed to the first protective chamber (30) and the second protective chamber (50); the faceplate assembly (10) is fixedly connected to the water-passing body and is provided with a thermostatic valve knob (101) connected to the thermostatic valve core (6) and a switch valve knob (102) connected to the switch valve core (8).

10. A concealed water-passing device as described in claim 9, characterized in that, The first protective component (7) is a water hammer protection component, and the second protective component (9) is a freeze crack protection component.

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