CN220037805U - Tee bend subassembly and water heater - Google Patents

Abstract

The utility model discloses a tee joint assembly and a water heater. The tee assembly includes: the three-way pipe comprises a three-way pipe, wherein a first interface is formed at one end part of the three-way pipe, a second interface is formed at the other end part of the three-way pipe, and a third interface is formed on the pipe wall of the three-way pipe; the anti-backflow module comprises a mounting cylinder, a sealing gasket, a first spring and an end cover, wherein an inner folding edge structure is arranged at a water inlet port of the mounting cylinder, the inner folding edge structure forms a water inlet hole, the sealing gasket and the first spring are positioned in the mounting cylinder, a water outlet hole is formed in the end cover and is arranged at the water outlet port of the mounting cylinder, the first spring is clamped between the sealing gasket and the end cover, and the sealing gasket is adjacent to the water inlet hole and is configured to be selectively blocked by the action of water pressure. The water backflow of the electric water heater to the water inlet pipe is reduced, so that the use reliability of the water heater is improved.

Description

Tee components and water heaters

Technical field

The utility model belongs to the technical field of household appliances, and particularly relates to a tee assembly and a water heater.

Background technique

At present, water heaters are commonly used household appliances in people's daily lives. Water heaters are divided into gas water heaters, electric water heaters, heat pump water heaters and solar water heaters. Electric water heaters are widely used because of their ease of use. Among them, electric water heaters can be divided into storage-type electric water heaters and instantaneous electric water heaters according to the heating power. Storage-type electric water heaters are equipped with a water tank, which has the characteristics of large water output and stable water temperature, and is purchased by more families. use.

In order to meet the requirements of constant temperature water outlet, electric water heaters are usually equipped with a thermostatic valve. The thermostatic valve is installed on the outlet pipe of the electric water heater, while the water inlet pipe of the electric water heater needs to be installed with a tee pipe to meet the installation requirements of cold water inlet and bypass pipe.

However, during use, when the user is not using water, when the electric water heater performs the heating process, due to the influence of the gravity of the water inside the inner tank of the electric water heater and the pressure generated during heating, the water heater arranged at the bottom of the inner tank The water inlet pipe is prone to water backflow, that is, the water in the water tank flows backward from the water inlet pipe through the bypass pipe and enters the thermostatic valve for output. After seepage, the liquid level in the inner tank will drop, causing the electric heating tube to be exposed and dry-burned. The steam generated during the dry-burning process will further aggravate the degree of backflow and seepage, eventually causing damage to the electric water heater. How to design a technology that reduces the backflow of electric water heater water to the water inlet pipe to improve the reliability of the water heater is a technical problem to be solved by this utility model.

Utility model content

The utility model provides a tee assembly and a water heater, which can reduce the backflow of water heater water to the water inlet pipe and improve the reliability of the water heater.

In order to achieve the above technical objectives, the present utility model adopts the following technical solutions:

In one aspect, the utility model provides a tee assembly, including:

Tee, one end of the Tee forms a first interface, the other end of the Tee forms a second interface, and the wall of the Tee forms a third interface;

Anti-backflow module, the anti-backflow module includes a mounting barrel, a sealing gasket, a first spring and an end cover. The water inlet port of the mounting barrel is provided with an inner flange structure, and the inner flange structure forms a water inlet hole. , the sealing gasket and the first spring are located in the installation barrel, the end cover is provided with a water outlet hole and is provided at the water outlet port of the installation barrel, the first spring is clamped between the sealing gasket and the installation barrel. Between the end caps, the sealing gasket is adjacent to the water inlet hole and is configured to selectively block the water inlet hole under the action of water pressure;

Wherein, the backflow prevention module is arranged in the tee pipe and between the second interface and the third interface, the water inlet port is arranged opposite to the first interface, and the water outlet port arranged opposite to the second interface.

Compared with the existing technology, the advantages and positive effects of this utility model are: by configuring an additional anti-backflow module in the tee pipe, during use, when the user does not use water, when the water in the water tank is Under the action of its own weight or internal pressure, the sealing gasket is affected by water pressure, so that the sealing gasket blocks the water inlet hole formed by the installation barrel, thereby preventing the water in the water tank from flowing back from the water inlet pipe. When the user uses water, due to the outflow The water pipe is opened to release the pressure in the water tank, and the water transported by the external water supply pipe enters the tee pipe. The sealing gasket is opened under the action of external water pressure against the elastic force of the first spring, so that the external water supply enters the water tank through the water inlet pipe. , to reduce the occurrence of water heater water backflow to the water inlet pipe to improve the reliability of the water heater.

In one embodiment of the present application, the backflow prevention module further includes a pressure relief plate, a second spring and a guide rod. The pressure relief plate is provided at one end of the guide rod, and the second spring is sleeved on the guide rod. On the guide rod, there are also protruding positioning ribs;

The sealing gasket is provided with a socket, the guide rod is inserted into the socket, the pressure relief plate is located on one side of the sealing gasket and close to the water outlet port of the installation barrel, and the second spring is located on the The other side of the sealing gasket is sandwiched between the sealing gasket and the positioning rib.

In one embodiment of the present application, a support hole is provided on the end cover, and the other end of the guide rod is inserted into the support hole.

In one embodiment of the present application, a first annular rib is formed on the surface of the inner folding structure, and the sealing gasket and the first annular rib cooperate to form a first sealing area.

In one embodiment of the present application, a second annular rib is formed on the surface of the pressure relief plate, and the sealing gasket and the second annular rib cooperate to form a second sealing area.

In one embodiment of the present application, the sealing gasket includes a mounting base and a sealing ring. The mounting base is provided with the socket, and the sealing ring is disposed on the mounting seat and surrounds the periphery of the socket. .

In one embodiment of the present application, a first boss is provided on one end face of the mounting base, a second boss is provided on the other end face of the mounting base, and the insertion hole penetrates the first boss and the The second boss, the insertion hole has a stepped hole structure, the sealing ring is set on the first boss, the first spring is set on the second boss, and the second spring is against The stepped surface formed by the socket.

In one embodiment of the present application, a detachable filter is also provided on the first interface.

In an embodiment of the present application, a water flow detection module is further included. The water flow detection module includes a mounting frame, a water wheel and a Hall element. The water wheel is rotatably arranged on the mounting frame. The mounting frame The Hall element is arranged inside the tee tube, and the Hall element is arranged outside the tee tube and is located on one side of the water wheel.

In another aspect, an embodiment of the present application also provides a water heater, including a water tank, a thermostatic valve and a bypass pipe. The water tank is provided with a water inlet pipe and a water outlet pipe, and also includes the above-mentioned three-way assembly; wherein, the thermostatic valve is provided with a water inlet pipe and a water outlet pipe. The valve is arranged on the water outlet pipe, the tee pipe of the tee assembly is arranged on the water inlet pipe, and the bypass pipe is connected between the thermostatic valve and the tee pipe.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description The drawings illustrate some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting any creative effort.

Figure 1 is a structural principle diagram of an embodiment of the water heater of the present utility model;

Figure 2 is a schematic structural diagram of the tee assembly in Figure 1;

Figure 3 is a cross-sectional view of the tee assembly in Figure 1;

Figure 4 is a partially enlarged schematic diagram of area A in Figure 3;

Reference signs:

Water tank 100, thermostatic valve 200, bypass pipe 300, tee assembly 400;

Water inlet pipe 101, water outlet pipe 102;

Tee pipe 1, filter 11;

Anti-backflow module 2, installation barrel 21, sealing gasket 22, first spring 23, end cover 24, pressure relief plate 25, second spring 26, guide rod 27;

Water inlet hole 211, first annular rib 212, mounting base 221, sealing ring 222, water outlet hole 241, support hole 242, second annular rib 251, positioning rib 271;

first boss 2211, second boss 2212;

Water flow detection module 3, mounting bracket 31, water wheel 32, and Hall element 33.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the description The embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

It should be noted that in the description of the present utility model, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the direction or direction. The terminology of positional relationships is based on the orientation or positional relationship shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood. For the limitation of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

In this utility model, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Ground connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise expressly stipulated and limited, the first feature "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features. Features are not in direct contact but through other features between them. Furthermore, the terms "above", "above" and "above" a first feature on a second feature include the first feature being directly above or diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature. "Below", "under" and "under" the first feature is the second feature include the first feature being directly below or diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numbers and/or reference letters in different examples, such repetition being for purposes of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

A water heater uses electric energy as the main energy material. The high-temperature heat generated after being powered on directly heats the water stored in the water heater to achieve the purpose of preparing hot water.

Water heaters usually include water tanks, electric heating components, and electric control panels. A water storage cavity is formed in the water tank to store water to be heated. The electric heating components are inserted into the water storage cavity formed by the water tank. The electric control panel is It is used to control the on-off operation of the electric heating component so that the water in the water tank is heated to the set temperature.

For water heater water tanks, the water tank generally includes an outer shell and an inner tank, and an insulation layer is formed between the outer shell and the inner tank. Among them, the outer shell is generally made of plastic material to meet the design requirements of beautiful and diverse shapes; the inner tank can be made of metal or plastic as needed.

In addition, for the insulation layer formed between the outer shell and the inner tank, commonly used insulation materials include: asbestos, sponge, foam plastic, polyurethane foam, etc. In conventional technology, in order to obtain good insulation effect, foaming is usually used to form the insulation layer. layer.

Among them, for the inner tank with a metal tank body, due to the influence of water quality, the inside of the tank is prone to corrosion. For this reason, the water tank is also equipped with a magnesium rod, which is inserted into the water storage cavity inside the water tank.

Since magnesium is the metal with the lowest potential in the electrochemical series, it is physiologically non-toxic. Therefore, it is ideal to make magnesium rods to protect the inner liner. The size of the magnesium rod is directly related to the length of time to protect the liner and the size of the protective effect. The larger the magnesium rod, the better the protection effect and the longer the protection time.

The water tank is also equipped with a water inlet pipe and a water outlet pipe. The water inlet pipe is used to transport cold water into the water storage cavity formed in the water tank, and the hot water in the water storage cavity is output from the water outlet pipe.

For the electric heating component, electric heating methods such as electric heating wire, magnetic energy or silicon tube heating can be used to heat the water stored in the water storage cavity.

For the electronic control board, it is used to receive detection signals sent by relevant sensors (such as water temperature sensors, flow sensors), and at the same time, control the power on and off of the electric heating components.

When the water heater is working, the electric control board controls the electric heating component to be powered on and heated. When the water temperature in the water tank reaches the set value, the electric control board controls the electric heating component to be powered off.

As shown in Figures 1-4, an embodiment of the present application provides a water heater, including a water tank 100, a thermostatic valve 200, a bypass pipe 300 and a tee assembly 400. The water tank 100 is provided with a water inlet pipe 101 and a water outlet pipe 102. .

The thermostatic valve 200 is disposed on the water outlet pipe 102 , the tee pipe of the tee assembly 400 is disposed on the water inlet pipe 101 , and the bypass pipe 300 is connected between the thermostatic valve 200 and the tee pipe 1 .

Specifically, for the thermostatic valve 200, it can automatically adjust the mixing ratio of hot and cold water in the water inlet pipe 101 and the water outlet pipe 102 to ensure that water at the user-set temperature is output from the thermostatic valve 200. The specific details about the thermostatic valve 200 are: For the structural form, reference can be made to mechanical valves or electronically controlled valves with constant temperature control in conventional technology, which will not be restricted or repeated here.

In order to meet the requirement of the thermostatic valve 200 to input cold water for mixing hot and cold water, a tee assembly 400 is provided on the water inlet pipe 101. The tee assembly 400 has the function of a tee connection, and the external water supply pipe and the inlet pipe are connected through the tee assembly 400. The water pipe 101 and the bypass pipe 300 are connected. Part of the cold water input from the external water supply pipe enters the water inlet pipe 101 as needed, and the remaining part enters the bypass pipe 300. Of course, under certain circumstances, there may also be situations where all the cold water enters the water tank 100 through the water inlet pipe 101, and the specific use process is not limited here.

For the tee assembly 400, since it is connected between the water inlet pipe 101 and the external water supply pipe, when the user does not use water, the outlet water path of the water outlet pipe 102 is in a closed state, and the water heater is in the heating process. Affected by the gravity of the water inside the inner tank of the water heater and the pressure generated during heating, the water inlet pipe arranged at the bottom of the inner tank is prone to water backflow from the water inlet pipe 101. In order to avoid the phenomenon of water backflow from the water inlet pipe 101. The following structural improvements are made to the tee assembly 400.

Tee assembly 400, including:

Tee pipe 1, one end of the tee pipe 1 forms a first interface, the other end of the tee pipe 1 forms a second interface, and a third interface is formed on the wall of the tee pipe 1;

Anti-backflow module 2, anti-backflow module 2 includes a mounting barrel 21, a sealing gasket 22, a first spring 23 and an end cover 24. The water inlet port of the mounting barrel 21 is provided with an inner folding structure, and the inner folding structure forms The water inlet hole 211, the sealing gasket 22 and the first spring 23 are located in the installation barrel 21. The end cover 24 is provided with a water outlet hole 241 and is provided at the water outlet port of the installation barrel 21. The first spring 23 is sandwiched between the sealing gasket 22 and the end cover. 24, the sealing gasket 22 is adjacent to the water inlet hole 211 and is configured to selectively block the water inlet hole 211 under the action of water pressure;

Wherein, the backflow prevention module 2 is arranged in the tee pipe 1 and is located between the second interface and the third interface, the water inlet port is arranged opposite to the first interface, and the water outlet port is arranged opposite to the first interface. The second interfaces are relatively arranged.

Specifically, the tee assembly 400 connects the external water supply pipe, the water inlet pipe 101 and the bypass pipe 300 through the tee pipe 1, and the tee assembly 400 is also provided with an anti-backflow module 2 inside, and the anti-backflow module 2 is installed by The barrel 21 and the end cap 24 assemble the sealing gasket 22 and the first spring 23 together, and then the tee assembly 400 is integrally assembled into the tee pipe 1 through the installation barrel 21 .

In actual use, when the user uses water normally, the water terminal equipment (such as a shower or hot water faucet) is opened, the water in the water tank 100 flows from the outlet pipe 102 to the thermostatic valve 200 and is output, and the cold water delivered by the external water supply pipe Through the tee pipe 1, at this time, under the action of the external water supply pressure, the sealing gasket 22 will overcome the elastic force of the first spring 23, so that the sealing gasket 22 leaves the water inlet hole 211, and the cold water flows into the installation barrel 21 and passes through the inlet. The water pipe 101 enters the water tank 100.

When the user turns off the water supply, due to the high temperature of the water in the water tank 100 and the weight of the water in the water tank 100 , the water in the water tank 100 may flow back through the water inlet pipe 101 . At this time, since the sealing gasket 22 seals the water inlet hole 211 under the action of the first spring 23, the water in the water tank 100 will not flow back due to the influence of its own gravity.

Compared with the existing technology, the advantages and positive effects of this utility model are: by configuring an additional anti-backflow module in the tee pipe, during use, when the user does not use water, when the water in the water tank is Under the action of its own weight or internal pressure, the sealing gasket is affected by water pressure, so that the sealing gasket blocks the water inlet hole formed by the installation barrel, thereby preventing the water in the water tank from flowing back from the water inlet pipe. When the user uses water, due to the outflow The water pipe is opened to release the pressure in the water tank, and the water transported by the external water supply pipe enters the tee pipe. The sealing gasket is opened under the action of external water pressure against the elastic force of the first spring, so that the external water supply enters the water tank through the water inlet pipe. , to reduce the occurrence of water heater water backflow to the water inlet pipe to improve the reliability of the water heater.

In an embodiment of the present application, under normal circumstances, in order to ensure the reliability of use, when the pressure in the water tank 100 exceeds the set value, timely pressure relief is required to ensure the safety of use. For this reason, an additional installation on the water inlet pipe 101 can be A pressure relief valve is configured, and in this embodiment, the pressure relief valve is installed on the first interface of the tee pipe 1 to connect with the external water supply pipe through the pressure relief valve.

Since the tee pipe 1 is provided with an anti-backflow module 2 to solve the problem of water in the water tank 100 flowing back due to its own weight, further in order to meet the pressure relief requirements of the water tank 100, the anti-backflow module 2 also includes a pressure relief plate 25, The second spring 26 and the guide rod 27, the pressure relief plate 25 is provided at one end of the guide rod 27, the second spring 26 is sleeved on the guide rod 27, and the guide rod 27 is also provided with a protruding positioning rib 271;

The sealing gasket 22 is provided with a socket (not marked), the guide rod 27 is inserted into the socket, the pressure relief plate 25 is located on one side of the sealing gasket 22 and close to the water outlet port of the installation barrel 21, and the second spring 26 is located on the sealing gasket. 22 and is sandwiched between the sealing gasket 22 and the positioning rib 271 .

Specifically, the sealing gasket 22 is provided with an insertion hole through which the pressure relief plate 25, the second spring 26 and the guide rod 27 are installed. The pressure relief plate is located outside the sealing gasket 22 and is subject to the elastic force of the second spring 26. Always close the jack when the pressure is relieved.

When the pressure inside the water tank 100 continues to rise, the thrust generated by the water pressure received by the pressure relief plate 25 overcomes the elastic force of the second spring 26. At this time, the pressure relief plate 25 will move toward the first interface direction to leave the jack. In this way, the water in the water tank 100 can flow out through the socket, and the pressure relief valve will open and automatically release pressure under the action of water pressure.

The sealing gasket 22 provided in the tee assembly 400 can prevent the water in the water tank 100 from flowing back due to its own weight. Furthermore, by configuring the pressure relief plate 25, it can also meet the safe use requirements of normal pressure relief of the water tank 100.

In one embodiment of the present application, the end cover 24 is provided with a support hole 242, and the other end of the guide rod 27 is inserted into the support hole 242.

Specifically, since the pressure relief plate 25 is supported by the guide rod 27 to slide on the sealing gasket 22, the guide rod 27 is supported for better installation to ensure that the guide rod 27 can support the pressure relief plate 25 stably and reliably during use. If the guide rod 27 slides, a support hole 242 is provided on the end cover 24 to support the slide of the guide rod 27 .

In another embodiment of the present application, in order to improve the sealing performance of the sealing area formed between the sealing gasket 22 and the water inlet hole 211, a first annular rib 212 is formed on the surface of the inner folding structure, and the sealing gasket 22 and the third The annular ribs 212 cooperate to form a first sealing area.

Specifically, the sealing gasket 22 can be pressed tightly on the first annular rib 212, and under the extrusion of the first annular rib 212, the sealing gasket 22 is deformed to obtain good sealing performance.

Similarly, in order to improve the sealing performance of the sealing area formed between the sealing gasket 22 and the pressure relief plate 25, a second annular rib 251 is formed on the surface of the pressure relief plate 25, and the sealing gasket 22 and the second annular rib 251 cooperate to form a Second sealing area.

In one embodiment, the sealing gasket 22 includes a mounting base 221 and a sealing ring 222. The mounting base 221 is provided with the socket, and the sealing ring 222 is disposed on the mounting seat 221 and surrounds the periphery of the socket.

Specifically, the gasket 22 is sealed by a sealing ring 222, and the sealing ring 222 is installed through a mounting base 221. The mounting base 221 is formed with the insertion hole for the guide rod 27 to be installed and for water to flow through during pressure relief.

In another embodiment, one end surface of the mounting base 221 is provided with a first boss 2211, and the other end surface of the mounting base 221 is provided with a second boss 2212. The insertion hole penetrates the first boss and the third boss. Two bosses, the insertion hole has a stepped hole structure, a sealing ring 222 is placed on the first boss, a first spring 23 is placed on the second boss, and a second spring 26 is pressed against the insertion hole. The stepped surface formed by the hole.

Specifically, in order to facilitate the installation of the sealing ring 222, the first boss is provided on the mounting base 221, and the sealing ring 222 is placed on the first boss. Similarly, in order to facilitate the installation of the first spring 23 and the second spring 26, the second boss is provided on the mounting base 221, and the first spring 23 can be sleeved on the outside of the second boss, and the second boss is The insertion hole has a stepped structure, so that the second spring 26 can be inserted into the insertion hole portion formed in the second boss.

In one embodiment of the present application, a detachable filter 11 is also provided on the first interface.

Specifically, the filter screen 11 is disposed in the tee pipe 1 and installed in the first interface. The filter screen 11 can be used to filter the water entering the tee pipe 1 .

In another embodiment of the present application, the water flow detection module 3 is also included. The water flow detection module 3 includes a mounting frame 31, a water wheel 32 and a Hall element 33. The water wheel 32 is rotatably arranged on the mounting frame 31. The mounting frame 31 is arranged in the tee pipe 1, and the Hall element 33 is arranged outside the tee pipe 1 and is located on one side of the water wheel 32.

Specifically, in order to facilitate the measurement of water inflow, an installation frame 31 is provided in the tee pipe 1. A rotatable water wheel 32 is provided on the installation frame 31. The water wheel 32 can rotate under the action of water flow, and the Hall element 33 It is installed outside the tee pipe 1 and located on one side of the water wheel 32 to detect the rotating water wheel 32 and obtain water flow information.

In the description of this specification, reference to the description of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" is intended to be in conjunction with the implementation. A specific feature, structure, material or characteristic described in a manner or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art can still implement the foregoing implementation. The technical solutions described in the examples are modified, or some of the technical features are equivalently replaced; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present utility model.

Claims (10)

1. A tee assembly, characterized in that it includes: Tee, one end of the Tee forms a first interface, the other end of the Tee forms a second interface, and a third interface is formed on the wall of the Tee; Anti-backflow module, the anti-backflow module includes a mounting barrel, a sealing gasket, a first spring and an end cover. The water inlet port of the mounting barrel is provided with an inner flange structure, and the inner flange structure forms a water inlet hole. , the sealing gasket and the first spring are located in the installation barrel, the end cover is provided with a water outlet hole and is provided at the water outlet port of the installation barrel, the first spring is clamped between the sealing gasket and the installation barrel. Between the end caps, the sealing gasket is adjacent to the water inlet hole and is configured to selectively block the water inlet hole under the action of water pressure; Wherein, the backflow prevention module is arranged in the tee pipe and between the second interface and the third interface, the water inlet port is arranged opposite to the first interface, and the water outlet port arranged opposite to the second interface. 2. The tee assembly according to claim 1, wherein the backflow prevention module further includes a pressure relief plate, a second spring and a guide rod, and the pressure relief plate is disposed at one end of the guide rod, so The second spring is sleeved on the guide rod, and the guide rod is also provided with a protruding positioning rib; The sealing gasket is provided with a socket, the guide rod is inserted into the socket, the pressure relief plate is located on one side of the sealing gasket and close to the water outlet port of the installation barrel, and the second spring is located on the The other side of the sealing gasket is sandwiched between the sealing gasket and the positioning rib. 3. The tee assembly according to claim 2, wherein the end cap is provided with a support hole, and the other end of the guide rod is inserted into the support hole. 4. The tee assembly according to claim 2, wherein a first annular rib is formed on the surface of the inner folding structure, and the sealing gasket and the first annular rib cooperate to form a third A sealed area. 5. The tee assembly according to claim 2, wherein a second annular rib is formed on the surface of the pressure relief plate, and the sealing gasket and the second annular rib cooperate to form a second seal. area. 6. The tee assembly according to claim 2, wherein the sealing gasket includes a mounting base and a sealing ring, the mounting base is provided with the insertion hole, and the sealing ring is disposed on the mounting base. on and around the periphery of the socket. 7. The tee assembly according to claim 6, wherein one end surface of the mounting base is provided with a first boss, and the other end surface of the mounting base is provided with a second boss, and the socket is provided with a first boss. Penetrating the first boss and the second boss, the insertion hole has a stepped hole structure, the sealing ring is sleeved on the first boss, and the first spring is sleeved on the second boss on the step surface formed by the insertion hole. 8. The tee assembly according to claim 1, wherein a detachable filter is also provided on the first interface. 9. The tee assembly according to claim 1, further comprising a water flow detection module, the water flow detection module includes a mounting frame, a water wheel and a Hall element, the water wheel is rotatably disposed on On the mounting bracket, the mounting bracket is arranged in the tee pipe, and the Hall element is arranged outside the tee pipe and located on one side of the water wheel. 10. A water heater, including a water tank, a thermostatic valve and a bypass pipe. The water tank is provided with a water inlet pipe and a water outlet pipe. It is characterized in that it includes: the tee assembly according to any one of claims 1 to 9; Wherein, the thermostatic valve is set on the water outlet pipe, the tee pipe of the tee assembly is set on the water inlet pipe, and the bypass pipe is connected between the thermostatic valve and the tee pipe. .