Water heater and water inlet pipe assembly thereof

Abstract

The present application belongs to the technical field of household appliances, and particularly relates to a water heater and a water inlet pipe assembly thereof. The present application aims to solve the problem that the installation valve of the existing water heater is installed by the after-sales installation personnel, resulting in low after-sales service efficiency, unreliable safety valve sealing test, and easy water leakage. The water heater and the water inlet pipe assembly thereof, the water inlet pipe assembly comprising a water inlet pipe, a mounting head and a valve, the valve being provided with an embedded part embedded and injection molded on the mounting head, that is, the embedded part and the mounting head are an integral part integrally formed, which not only makes the connection between the valve and the mounting head stable and reliable, but also simplifies the processing technology; the connection between the valve and the mounting head is realized in the factory, and there is no need to install the valve after sales, which not only avoids the loss of the valve, but also saves the after-sales installation time and improves the after-sales service efficiency; the sealing property of the valve and the mounting head can be detected together in the detection process of the inner container of the water heater, which improves the product yield and avoids the problem of water leakage after installation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of household appliances, and particularly relates to a water heater and a water inlet pipe assembly thereof. BACKGROUND

[0002] A safety valve is usually installed on a water heater to prevent water from flowing back into the water heater and to release pressure when the pressure in the inner container is too high. The safety valve of the existing water heater is usually placed in a packaging box and installed on the water inlet pipe outside the shell by an after-sales installer when the water heater is installed.

[0003] The safety valve is placed independently of the water heater and is easy to lose. The safety valve is installed by an after-sales installer, which not only leads to a long installation time and low after-sales service efficiency, but also makes the sealing test of the safety valve unreliable by the after-sales installer, and the user is prone to water leakage during use, resulting in poor user experience.

[0004] Correspondingly, there is a need in the art for a new water heater and a water inlet pipe assembly thereof to solve the above problems. SUMMARY

[0005] In order to solve the above problems in the prior art, i.e., in order to solve the problem that the installation valve of the existing water heater is installed by an after-sales installer, leading to low after-sales service efficiency, unreliable sealing test of the safety valve, and easy water leakage, the present application provides a water heater and a water inlet pipe assembly thereof.

[0006] The water inlet pipe assembly comprises a water inlet pipe, a mounting head, and a valve, the mounting head is provided with a central passage, the top end of the mounting head is fixedly connected with the water inlet pipe, and the central passage is in communication with the water inlet pipe, and the valve is provided with an embedded part embedded and injection molded on the mounting head, and the valve is in communication with the central passage.

[0007] In an optional technical solution of the above water inlet pipe assembly, the valve is a safety valve, and the embedded part is embedded and injection molded on the bottom end of the mounting head.

[0008] In an optional technical solution of the above water inlet pipe assembly, the mounting head is provided with a radial passage, the valve is a pressure relief valve, the pressure relief valve is in communication with the radial passage, and the embedded part is embedded and injection molded on the side surface of the mounting head.

[0009] In an optional technical solution of the above water inlet pipe assembly, the embedded part and the pressure relief valve are an integrally formed integral part.

[0010] In the optional technical scheme of the water inlet pipe assembly, the embedded part is sealingly connected with the pressure relief valve; the water inlet pipe assembly further comprises a first connector, a top end of the first connector is provided with an embedded ring, the embedded ring is embedded and injection molded to a bottom end of the mounting head, and the embedded ring and the embedded part are an integrally formed unitary piece.

[0011] In the optional technical scheme of the water inlet pipe assembly, the valve is a one-way valve, and the embedded part embedded and injection molded to the bottom end of the mounting head.

[0012] In the optional technical scheme of the water inlet pipe assembly, the valve comprises a one-way valve and a pressure relief valve, the embedded part provided on the one-way valve is embedded and injection molded to the bottom end of the mounting head, and the embedded part provided on the pressure relief valve is embedded and injection molded to a side surface of the mounting head, and the side surface of the mounting head is provided with a radial channel, which is in communication with the pressure relief valve.

[0013] In the optional technical scheme of the water inlet pipe assembly, the embedded part comprises an embedded body and a plurality of embedded protrusions provided on the embedded body, and an embedded groove is formed between adjacent two embedded protrusions.

[0014] In the optional technical scheme of the water inlet pipe assembly, the water inlet pipe assembly further comprises a second connector, the second connector is embedded and injection molded to a top end of the central channel, and the second connector is used for sealingly connecting with the liner connecting pipe.

[0015] The water heater comprises a liner and the above-mentioned water inlet pipe assembly, the liner is provided with a liner connecting pipe, the mounting head of the water inlet pipe assembly is connected with the liner connecting pipe, and the water inlet pipeline of the water inlet pipe assembly extends into the liner.

[0016] As can be understood by those skilled in the art, the water heater and the water inlet pipe assembly thereof of the present application are characterized in that the liner is provided with a liner connecting pipe, the water inlet pipe assembly comprises a water inlet pipeline, a mounting head and a valve, the water inlet pipeline extends into the liner, the mounting head is connected with the liner connecting pipe, the mounting head is provided with a central channel in communication with the valve and the water inlet pipeline respectively, the valve is provided with an embedded part, and the embedded part is embedded and injection molded to the mounting head, i.e., the embedded part and the mounting head are an integrally formed unitary piece, which not only makes the connection between the valve and the mounting head stable and reliable, but also simplifies the processing technology; the connection between the valve and the mounting head is realized in the factory, and there is no need to install the valve after sale, which not only avoids the loss of the valve, but also saves the installation time after sale and improves the efficiency of after-sale service; the sealing property of the valve and the mounting head can be detected together in the detection process of the liner of the water heater, which improves the product yield and avoids the problem of water leakage after installation; at the same time, the installation of the valve in the factory can meet the national standards of some countries, which is beneficial to improving the universality of the water heater. BRIEF DESCRIPTION OF DRAWINGS

[0017] The preferred embodiments of the water heater and its water inlet pipe assembly of the present application will be described below with reference to the accompanying drawings. The drawings are as follows:

[0018] Figure 1 is a sectional view of the water inlet pipe assembly of the first embodiment of the present application;

[0019] Figure 2 is an enlarged schematic view of P in Figure 1

[0020] Figure 3 is a sectional view of the water inlet pipe assembly of the second embodiment of the present application;

[0021] Figure 4 is an enlarged schematic view of Q in Figure 3

[0022] Figure 5 is a sectional view of the water inlet pipe assembly of the third embodiment of the present application;

[0023] Figure 6 is an enlarged schematic view of M in Figure 5

[0024] Figure 7 is a sectional view of the water inlet pipe assembly of the fourth embodiment of the present application;

[0025] Figure 8 is an enlarged schematic view of N in Figure 7

[0026] In the drawings: 1, water inlet pipe; 11, water inlet inner pipe; 111, hot melt part; 12, water inlet outer pipe; 2, mounting head; 21, central passage; 22, radial passage; 3, pressure relief valve; 31, first insert; 311, first insert body; 312, first insert protrusion; 313, first insert groove; 32, sealing ring; 33, first connecting ring; 4, one-way valve; 41, second insert; 411, second insert body; 412, second insert protrusion; 413, second insert groove; 5, first joint; 51, insert ring; 52, second connecting ring; 6, second joint; 61, plastic sleeve; 62, sealing gasket. DETAILED DESCRIPTION

[0027] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application. Those skilled in the art can adjust them as needed in order to adapt to specific application occasions. For example, although the water inlet pipe assembly of the present application is described in combination with an electric water heater, this is not limiting, and other devices with water inlet requirements can also be configured with the water inlet pipe assembly of the present application, such as air energy water heaters.

[0028] ​​​​Second, it needs to be explained that in the description of the present application, the terms indicating the direction or position relationship of "in", "out" and the like are based on the direction or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In addition, it also needs to be explained that in the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] The safety valve of the existing water heater is usually installed by the after-sales installer as an accessory, which is generally placed separately from the water heater in a packaging box and is easy to lose. When installing the safety valve, the after-sales installer finds it cumbersome, resulting in a longer operation time for the after-sales installer; the safety valve cannot detect the sealing of its interface during installation, and the after-sales installer only detects the sealing of the installed valve through a simple water test, which is unreliable, and users are prone to water leakage during use, resulting in poor user experience. Moreover, in the national standards of some countries, the safety valve must be pre-installed on the water heater by the manufacturer.

[0031] Therefore, the present application provides a water heater and a water inlet pipe assembly thereof, wherein the water inlet pipe assembly comprises a water inlet pipe, a mounting head and a valve, the mounting head is provided with a central passage in communication with the valve and the water inlet pipe, respectively, and an embedding part is arranged on the valve, which is embedded and injection molded on the mounting head, that is, the embedding part and the mounting head are an integral part of one-piece molding, which not only makes the connection between the valve and the mounting head stable and reliable, but also simplifies the processing technology; the connection between the valve and the mounting head is realized in the factory, and there is no need to install the valve after sales, which not only avoids the loss of the valve, but also saves the installation time after sales and improves the efficiency of after-sales service; the sealing of the valve and the mounting head can be detected together during the detection of the inner tank of the water heater, which improves the yield of the product and avoids the problem of water leakage after installation; at the same time, the manufacturer installs the valve in the factory, which can meet the national standards of some countries and is beneficial to improve the universality of the water heater. In the present application, the valve can be a safety valve, and the valve can also be a one-way valve and / or a pressure relief valve to prevent water backflow and pressure relief when the pressure of the inner tank is too high.

[0032] The optional technical solutions of the water heater and the water inlet pipe assembly thereof of the present application are described below.

[0033] The water heater provided by the embodiment of the present application comprises an inner container and a water inlet pipe assembly, wherein the inner container is provided with an inner container connecting pipe. The inner container is a water storage container of the water heater and can be in any shape, such as a cylindrical shape, a square shape, etc. The inner container can be a stainless steel inner container, which is internally provided with a corrosion-resistant coating, such as enamel. The outer side of the inner container is provided with the inner container connecting pipe, the top end of the inner container connecting pipe can be welded to the inner container, and the bottom end of the inner container connecting pipe can be provided with an outer connecting thread for threaded connection with the mounting head 2. It should be noted that in the embodiment of the present application, the "top end" refers to the end close to or located at the inner side of the inner container, and the "bottom end" refers to the end away from the inner container or located at the outer side of the inner container. The inner container is provided with at least two inner container connecting pipes, which are respectively used for connecting the water inlet pipe and the water outlet pipe of the water heater.

[0034] Referring to Figure 1 and Figure 2 , Figure 1 is a sectional view of the water inlet pipe assembly of the first embodiment of the present application, Figure 2 is Figure 1 an enlarged schematic view of P. As shown in Figure 1 and Figure 2 , the water inlet pipe assembly of the embodiment of the present application comprises a water inlet pipe 1, a mounting head 2 and a valve, the mounting head 2 is connected with the inner container connecting pipe, and the water inlet pipe 1 extends into the inner container.

[0035] The mounting head 2 is provided with a central passage 21, the top end of the mounting head 2 is fixedly connected with the water inlet pipe 1, and the central passage 21 is in communication with the water inlet pipe 1; the valve is provided with an embedded part (for example, a first embedded part 31 in Figure 1 and Figure 2 , a second embedded part 41 in Figure 5 and Figure 6 ), the embedded part is embedded and injection molded on the mounting head 2, and the valve is in communication with the central passage 21.

[0036] Firstly, it should be noted that in the embodiment, the water inlet pipe 1 is used for introducing tap water into the inner container, which can comprise a water inlet inner pipe 11 and a water inlet outer pipe 12 sleeved outside the water inlet inner pipe 11. The water inlet inner pipe 11 is a plastic pipe, which can be PPR, ABS, etc., and the present application does not limit this. The bottom end of the water inlet inner pipe 11 is fixedly connected with the mounting head 2, and the water inlet inner pipe 11 is in communication with the central passage 21. The top end of the water inlet inner pipe 11 is provided with a plug, and a water passing hole is provided on the side surface of the top end of the water inlet inner pipe 11 to avoid direct impact of water flow on the top wall of the inner container when water is introduced. The water inlet outer pipe 12 is entirely located in the inner container and can be a metal pipe to increase the structural strength of the water inlet pipe 1. An annular gap is formed between the water inlet outer pipe 12 and the water inlet inner pipe 11, and sealing rings are respectively arranged at both ends of the annular gap. A water inlet hole is provided on the side surface of the bottom end of the water inlet outer pipe 12.

[0037] The water inlet process of the water heater inner container is that the water in the water pipeline enters the water inlet inner pipe 11 through the central channel 21, the water reaches the top of the water inlet inner pipe 11, and then enters the annular interval through the water hole, and the water flow enters the inner container through the water inlet hole at the bottom of the annular interval, so that the water flow path is prolonged, the water flow resistance is increased, and the electric shock prevention effect is achieved.

[0038] In an alternative embodiment, the water inlet inner pipe 11 and the mounting head 2 are both PPR, and the bottom end of the water inlet inner pipe 11 is hot melt welded in the mounting head 2. The first and second inserts 31 and 41 and the first and second joints 5 and 6 to be described below can be copper pieces, and the expansion coefficient of the copper pieces is close to the expansion coefficient of PPR, which is beneficial to improve the sealing performance and yield of insert injection molding.

[0039] The mounting head 2 is provided with a central channel 21, and the top end of the mounting head 2 is fixedly connected with the water inlet inner pipe 11. When the mounting head 2 and the water inlet inner pipe 11 are both plastic pieces, the mounting head 2 is hot melt welded with the water inlet inner pipe 11. In combination with the description of the first and second inserts 31 and 41 to be described below Figure 6 and Figure 8 When the water inlet inner pipe 11 is hot melt welded with the mounting head 2, the bottom end of the water inlet inner pipe 11 is provided with a hot melt part 111, and the hot melt part 111 is annular structure, and the outer diameter of the hot melt part 111 is greater than the diameter of the water inlet inner pipe 11, so as to increase the hot melt welding area with the mounting head 2, and further increase the stability of the connection between the water inlet inner pipe 11 and the mounting head 2. Moreover, the outer diameter of the water inlet inner pipe 11 is smaller than the outer diameter of the hot melt part 111, and the mounting space can be reserved for the plastic sleeve 61 and the sealing gasket 62 in the second joint 6 below.

[0040] In order to realize the sealing connection between the mounting head 2 and the inner container connecting pipe, the top end of the mounting head 2 is provided with the second joint 6. Optionally, the second joint 6 is a copper joint, which is formed into an integral piece with the mounting head 2 by insert injection molding process, and the connection is firm and the process is simple. The second joint 6 is a tubular structure, and the outer side of the second joint 6 is provided with a protrusion and a groove to increase the injection molding connection area with the mounting head 2, and further improve the stability and reliability of the embedded connection; the inner side of the second joint 6 is provided with an internal thread, which is threadedly connected with the inner container connecting pipe; and a sealing ring is arranged between the second joint 6 and the inner container connecting pipe.

[0041] Further, the second joint 6 and the water inlet inner pipe 11 have a space therebetween, and a plastic sleeve 61 is arranged in the space, and the plastic sleeve 61 is sleeved on the outer side of the water inlet inner pipe 11, that is, the inner container connecting pipe is located between the second joint 6 and the plastic sleeve 61; and a sealing gasket 62 is arranged between the plastic sleeve 61 and the end portion of the space. The present application improves the sealing performance of the connection between the second joint 6 and the water inlet inner pipe 11 by arranging the plastic sleeve 61 and the sealing gasket 62 in the second joint 6.

[0042] In order to realize the connection of the mounting head 2 and the water pipe, the bottom end of the mounting head 2 is provided with a first joint 5. Optionally, the first joint 5 is a copper joint which is formed into an integral piece with the mounting head 2 by using an insert injection molding process, the connection is firm, and the process is simple. The first joint 5 is a tubular structure, the top end of which is embedded into the mounting head 2, and the bottom end of which is provided with a connecting thread for connecting with the water pipe.

[0043] The valve of the embodiment can be a one-way valve to prevent the water in the inner container from flowing back; the valve of the embodiment can also be a pressure relief valve to relieve pressure when the pressure in the inner container is too high; the valve of the embodiment can also be a safety valve to prevent the water in the inner container from flowing back and relieve pressure when the pressure in the inner container is too high; and the valve of the embodiment can also simultaneously include a one-way valve and a pressure relief valve.

[0044] The valve of the embodiment is in communication with the central passage 21, and the valve is provided with an embedded part which is embedded and injection molded on the mounting head 2 to realize the fixed connection of the valve and the mounting head 2. The valve of the embodiment is formed into an integral piece with the mounting head 2 by embedding and injection molding through the embedded part, so that the connection of the valve and the mounting head 2 is stable and reliable, and the sealing performance is strong.

[0045] Therefore, the water inlet pipe assembly of the embodiment of the application includes the water inlet pipe 1, the mounting head 2 and the valve, the mounting head 2 is provided with the central passage 21 which is in communication with the valve and the water inlet pipe 2 respectively, the valve is provided with the embedded part which is embedded and injection molded on the mounting head 2, that is, the embedded part and the mounting head 2 are an integral piece formed by integral molding, which not only makes the connection of the valve and the mounting head 2 stable and reliable, but also simplifies the processing technology; the connection of the valve and the mounting head 2 is realized in the factory, and there is no need to install the valve after sale, which not only avoids the loss of the valve, but also saves the installation time after sale and improves the efficiency of after-sale service; the sealing performance of the valve and the mounting head 2 can be detected together during the detection of the inner container of the water heater, which improves the product yield and avoids the problem of water leakage after installation; at the same time, the manufacturer installs the valve in the factory, which can meet the national standards of some countries and is beneficial to improving the universality of the water heater.

[0046] In one possible implementation, the valve is a safety valve, and the embedded part is embedded and injection molded to the bottom end of the mounting head 2. Among them, the safety valve can be an existing structure, which has the functions of check valve and pressure relief valve, can prevent the backflow of water into the inner container and discharge excess pressure when the pressure of the inner container is too high, so as to ensure the service life of the inner container and avoid the occurrence of the accident of the inner container explosion. A flow channel is formed in the valve body of the safety valve, the flow channel is in communication with the central channel 21, and the top end of the flow channel is provided with an embedded part, and the bottom end of the flow channel is provided with a connecting head for connecting the water pipe. Optionally, the embedded part and the valve body of the safety valve are an integral part formed integrally, for example, the valve body and the embedded part are metal parts, which are made by casting process, convenient for processing and stable in structure. The embedded part and the mounting head 2 are made into an integral part by the embedded injection molding process, so that the connection between the safety valve and the mounting head 2 is stable and reliable, good in sealing, and the problem of water leakage is avoided, which is beneficial to improve the user experience.

[0047] In one possible implementation, the mounting head 2 is provided with a radial channel 22; the valve is a pressure relief valve 3, the pressure relief valve 3 is in communication with the radial channel 22, and the embedded part is embedded and injection molded to the side surface of the mounting head 2. For the convenience of description, the embedded part provided on the pressure relief valve 3 is a first embedded part 31.

[0048] As shown in Figure 1 and Figure 2 , the pressure relief valve 3 comprises a valve body and a pressure relief assembly arranged in the valve body, and the specific structure of the pressure relief assembly is not limited in the present application. The valve body and the first embedded part 31 are an integral part formed integrally. The pressure relief valve 3 is provided with a flow channel, and the first embedded part 31 is provided with a passageway in communication with the flow channel, and the passageway is in communication with the radial channel 22.

[0049] The first embedded part 31 can be an arc-shaped structure extending circumferentially along the mounting head 2, which is simple in structure and convenient for processing; or the first embedded part 31 can also be an annular structure extending in the circumferential direction of the mounting head 2, so that the connection between the first embedded part 31 and the mounting head 2 is more stable and reliable.

[0050] The first embedded part 31 can be a plate structure, which is simple in structure and convenient for processing; or the first embedded part 31 is formed with a concave-convex structure to increase the contact area with the mounting head 2, thereby increasing the stability and sealing performance of the injection molding connection with the mounting head 2.

[0051] In the embodiment, the mounting head 2 is provided with a radial channel in communication with the central channel 21, and the pressure relief valve 3 is installed on the side surface of the mounting head 2. At this time, the bottom end of the mounting head 2 is provided with a first connector 5 for connecting the water pipe.

[0052] The water heater of the embodiment comprises a pressure relief valve 3, and the first embedding piece 31 is embedded in the side of the mounting head 2 by injection molding, so that the connection between the pressure relief valve 3 and the mounting head 2 is stable and reliable, has good sealing performance, and avoids water leakage, which is conducive to improving the user experience.

[0053] In some examples, the first embedding piece 31 is an integral piece integrally formed with the pressure relief valve 3. Specifically referring to Figure 1 and Figure 2 , the first embedding piece 31 is an integral piece integrally formed with the valve body of the pressure relief valve 3, so that the connection between the first embedding piece 31 and the pressure relief valve 3 is stable and reliable and has no sealing problem.

[0054] In other examples, referring to Figure 3 and Figure 4 , wherein, Figure 3 is a sectional view of the water inlet pipe assembly of the second embodiment of the application, Figure 4 is Figure 3 , an enlarged schematic view of Q in FIG. 8. In this example, the first embedding piece 31 is in sealing connection with the pressure relief valve 3; the water inlet pipe assembly of this example further comprises a first connector 5, and the top end of the first connector 5 is provided with an embedding ring 51 embedded in the bottom end of the mounting head 2 by injection molding, and the embedding ring 51 is an integral piece integrally formed with the first embedding piece 31.

[0055] First, in this example, the first connector 5 comprises the embedding ring 51 and a second connecting ring 52, wherein the embedding ring 51 is embedded in the bottom end of the mounting head 2 by injection molding, and the second connecting ring 52 is exposed on the outside of the mounting head 2 and is provided with threads for connecting a water pipeline. In order to improve the stability of the connection between the embedding ring 51 and the mounting head 2, the inner side surface of the embedding ring 51 is provided with a concave-convex structure, or the outer side surface of the embedding ring 51 is provided with a concave-convex structure, or both the inner side surface and the outer side surface of the embedding ring 51 are provided with a concave-convex structure.

[0056] Secondly, in this example, the first embedding piece 31 and the pressure relief valve 3 are two separate pieces and can be machined separately, which is simple in structure and convenient to machine. The first embedding piece 31 is in sealing connection with the pressure relief valve 3, specifically, the first embedding piece 31 is provided with an inner threaded hole, the pressure relief valve 3 is provided with an outer threaded connector, the outer threaded connector is in threaded connection with the inner threaded hole, the fixed connection between the first embedding piece 31 and the pressure relief valve 3 is realized, and a sealing ring 32 is arranged between the pressure relief valve 3 and the first embedding piece 31 to avoid water leakage between the pressure relief valve 3 and the first embedding piece 31.

[0057] Finally, in the present embodiment, the first embedding part 31 and the embedding ring 51 are integrally formed. The first embedding part 31 is embedded in the side of the mounting head 2, and the embedding ring 51 is embedded in the bottom end of the mounting head 2. Thus, the first connecting ring 33 is further arranged between the first embedding part 31 and the embedding ring 51. The two ends of the first connecting ring 33 are respectively connected with the first embedding part 31 and the embedding ring 51, and the first connecting ring 33, the first embedding part 31 and the embedding ring 51 are integrally formed. The first connecting ring 33, the first embedding part 31 and the embedding ring 51 can be made by casting process, which is simple and convenient to process. In addition, the integral arrangement is beneficial to improve the reliability and stability of the connection with the mounting head 2.

[0058] In one possible implementation, referring to Figure 5 and Figure 6 wherein, Figure 5 is a sectional view of the water inlet pipe assembly of Embodiment Three of the present application, Figure 6 is Figure 5 an enlarged schematic view of M in FIG. 4. The valve is a one-way valve 4, which can be an existing check valve structure, and is not limited herein. The embedding part of the one-way valve 4 is embedded and injection molded into the bottom end of the mounting head 2. For convenience of description, the embedding part arranged on the one-way valve 4 is a second embedding part 41. As shown in Figure 5 and Figure 6 , the one-way valve 4 includes a one-way valve body and a check assembly arranged in the one-way valve body, which is used to prevent the water in the inner bag from flowing back. The second embedding part 41 is formed on the outer side of the one-way valve body, that is, the second embedding part 41 and the one-way valve body are integrally formed. In some examples, a concave-convex structure is formed on the outer side of the one-way valve body, which is embedded in the mounting head 2, and the concave-convex structure is the second embedding part 41.

[0059] In one possible implementation, referring to Figure 7 and Figure 8 wherein, Figure 7 is a sectional view of the water inlet pipe assembly of Embodiment Four of the present application, Figure 8 is Figure 7 an enlarged schematic view of N in FIG. 5. In the present implementation, the valve includes a one-way valve 4 and a pressure relief valve 3. The embedding part arranged on the one-way valve 4, that is, the second embedding part 41, is embedded and injection molded into the bottom end of the mounting head 2. The embedding part arranged on the pressure relief valve 3, that is, the first embedding part 31, is embedded and injection molded into the side of the mounting head 2, and the side of the mounting head 2 is provided with a radial channel 22, which is in communication with the pressure relief valve 3.

[0060] That is, in the present implementation, the one-way valve 4 and the pressure relief valve 3 are simultaneously injection molded and embedded on the mounting head 2. The one-way valve 4 allows the water in the water pipe to flow into the inner bag in one direction, preventing the water in the inner bag from flowing back. The pressure relief valve 3 relieves pressure when the pressure in the inner bag is too high.

[0061] In the present implementation, the mounting manner of the pressure relief valve 3 is the same asFigure 1 and Figure 2 、 Figure 3 and Figure 4 are installed in the same way as shown in Figure 5 and Figure 6 , which will not be described here again.

[0062] In the present application, the embedding piece comprises an embedding body and a plurality of embedding protrusions arranged on the embedding body, and an embedding groove is formed between two adjacent embedding protrusions.

[0063] With particular reference to Figure 1 and Figure 2 、 Figure 7 and Figure 8 , the first embedding piece 31 comprises a first embedding body 311, a plurality of first embedding protrusions 312 are arranged on the first embedding body 311, and a first embedding groove 313 is formed between two adjacent first embedding protrusions 312. The concave-convex structure formed on the first embedding body 311 is beneficial to increase the contact area between the first embedding piece 31 and the mounting head 2, thereby improving the reliability and stability of the connection. For example, the first embedding body 311 is in the form of an annular structure arranged circumferentially along the mounting head 2, and a plurality of annular protrusions, i.e., the first embedding protrusions 312, are arranged on the inner annular surface of the first embedding body 311 along the axial direction of the mounting head 2, and an arc-shaped groove, i.e., the first embedding groove 313, is formed between two adjacent annular protrusions. The shape of the first embedding protrusions 312 and the first embedding groove 313 is not limited in the present application.

[0064] Then, with reference to Figures 5 to 8 , the second embedding piece 41 comprises a second embedding body 411, a plurality of second embedding protrusions 412 are arranged on the second embedding body 411, and a second embedding groove 413 is formed between two adjacent second embedding protrusions 412. The concave-convex structure formed on the second embedding body 411 is beneficial to increase the contact area between the second embedding piece 41 and the mounting head 2, thereby improving the reliability and stability of the connection. For example, the second embedding body 411 is in the form of an annular structure arranged circumferentially along the mounting head 2, and a plurality of annular protrusions, i.e., the second embedding protrusions 412, are arranged on the outer annular surface of the second embedding body 411 along the axial direction of the mounting head 2, and an arc-shaped groove, i.e., the second embedding groove 413, is formed between two adjacent annular protrusions. The shape of the second embedding protrusions 412 and the second embedding groove 413 is not limited in the present application.

[0065] In summary, the water heater of the present application comprises an inner container and a water inlet pipe assembly connected with the pipe of the inner container, wherein the water inlet pipe assembly comprises a water inlet pipe 1, a mounting head 2 and a valve, the mounting head 2 is provided with a central passage 21 respectively communicated with the valve and the water inlet pipe 2, the valve is provided with an embedded part, the embedded part is embedded and injection molded on the mounting head 2, that is, the embedded part and the mounting head 2 are an integral part, not only making the valve and the mounting head 2 connected stably and reliably, but also the processing technology is simple; the connection of the valve and the mounting head 2 is realized in the factory, without the need for after-sales installation of the valve, avoiding the loss of the valve, saving the after-sales installation time, and improving the efficiency of after-sales service; the sealing property of the valve and the mounting head 2 can be detected together in the detection process of the inner container of the water heater, improving the product yield and avoiding the problem of water leakage after installation; at the same time, the manufacturer installs the valve in the factory, which can meet the national standards of some countries, and is beneficial to improve the universality of the water heater.

[0066] So far, the technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical schemes after the changes or replacements will fall within the protection scope of the present application.

Claims

1. A water inlet pipe assembly, characterized by, The water inlet pipe assembly comprises: a water inlet pipe, a mounting head and a valve; the mounting head is provided with a central passage, and the top end of the mounting head is fixedly connected with the water inlet pipe, and the central passage is in communication with the water inlet pipe; the valve is provided with an embedded part, the embedded part is embedded and injection molded on the mounting head, and the valve is in communication with the central passage; when the valve is a pressure relief valve, the embedded part is embedded and injection molded on the side of the mounting head, the water inlet pipe assembly further comprises a first joint for connecting with a tap water pipe, the top end of the first joint is provided with an embedded ring, the embedded ring is embedded and injection molded on the bottom end of the mounting head; the inner side and / or outer side of the embedded ring is provided with a concave-convex structure; a first connecting ring is arranged between the embedded part and the embedded ring, the two ends of the first connecting ring are connected with the embedded part and the embedded ring respectively, and the embedded ring, the first connecting ring and the embedded part are an integral part formed by one-piece molding.

2. The inlet pipe assembly of claim 1, wherein, when the valve is a safety valve, the embedded part is embedded and injection molded on the bottom end of the mounting head.

3. The inlet tube assembly of claim 1, wherein, when the valve is a pressure relief valve, the mounting head is provided with a radial passage, and the pressure relief valve is in communication with the radial passage.

4. The inlet pipe assembly of claim 3, wherein, the embedded part and the pressure relief valve are an integral part formed by one-piece molding.

5. The inlet pipe assembly of claim 3, wherein, the embedded part and the pressure relief valve are in sealing connection.

6. The inlet tube assembly of claim 1, wherein, when the valve is a one-way valve, the embedded part is embedded and injection molded on the bottom end of the mounting head.

7. The inlet tube assembly of claim 1, wherein, when the valve comprises a one-way valve and a pressure relief valve, the embedded part arranged on the one-way valve is embedded and injection molded on the bottom end of the mounting head; the embedded part arranged on the pressure relief valve is embedded and injection molded on the side of the mounting head, and the side of the mounting head is provided with a radial passage, and the radial passage is in communication with the pressure relief valve.

8. The inlet tube assembly of any one of claims 1-7, wherein, the embedded part comprises an embedded body and a plurality of embedded protrusions arranged on the embedded body, and an embedded groove is formed between adjacent two embedded protrusions.

9. The inlet tube assembly of any one of claims 1-7, wherein, the water inlet pipe assembly further comprises a second joint, the second joint is embedded and injection molded on the top end of the central passage, and the second joint is used for sealing connection with an inner container connecting pipe.

10. A water heater, characterized by the water inlet pipe assembly comprises an inner container and the water inlet pipe assembly according to any one of claims 1-9, the inner container is provided with an inner container connecting pipe; the mounting head of the water inlet pipe assembly is connected with the inner container connecting pipe, and the water inlet pipe of the water inlet pipe assembly extends into the inner container.

Images