CN111365495A - Automatic switch and pressure relief valve of water heater - Google Patents

Abstract

The invention discloses an automatic switch of a water heater and a pressure relief safety valve, comprising a hot water three-way piece and a cold water four-way piece, an automatic switch valve core is arranged inside the pressure transmission port of the cold water four-way piece, and a pressure relief water outlet of the cold water four-way piece Internal pressure relief drain assembly. The water heater automatic switch and pressure relief safety valve of the invention are installed on the hot water outlet and the cold water inlet of the water heater respectively through the inner thread. The installation is simple and beautiful, and not only has the one-way safety valve of the water heater The functions of non-return, safe pressure relief, and manual water discharge can also realize automatic switch control of water supply to the water heater. The above functions make the water heater safe and convenient to use, and can replace the installation and use of the common water heater safety valve currently on the market.

Description

A water heater automatic switch and pressure relief safety valve

technical field

The invention belongs to the technical field of water heater safety valves, and in particular relates to an automatic switch of a water heater and a pressure relief safety valve.

Background technique

Electric water heater safety valve is mainly used in electric water heater, it has the functions of one-way check, safe pressure relief and manual water discharge. It is a necessary part for electric water heater installation. But now the electric water heater safety valve on the market does not have the function of automatically turning on and off the water. If the water heater leaks, it will cause a water leakage accident and bring great losses to the user's family property. If there is a safety valve that not only has the function of the electric water heater safety valve, but also can realize the function of automatic switching: that is, the safety valve automatically opens to supply water to the water heater when the user uses the water heater, and when the water heater is used up, the safety valve automatically closes the water heater to supply water. It is safe and convenient to use.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an automatic switch of a water heater and a pressure relief safety valve, which can be directly installed on the water heater to solve the problems raised in the above background technology.

In order to achieve the above purpose, the main technical solution of the present invention is to provide an automatic switch of a water heater and a pressure relief safety valve, including a hot water tee and a cold water tee, characterized in that the upper end of the hot water tee is The hot water inlet, the lower end is the hot water outlet, the right end is the pressure transmission port of the hot water tee, the hot water inlet is provided with a check valve, the upper end of the cold water tee is the cold water outlet, the lower end is the cold water inlet, and the left end is the cold water inlet. The pressure transfer port of the cold water four-way piece, the lower right end is the pressure relief outlet, the pressure transfer port of the cold water four-way piece is provided with an automatic switch valve core, and the pressure relief water outlet of the cold water four-way piece has a pressure relief and drainage assembly in the inner cavity.

In some embodiments, the automatic switch valve core includes a lower port, a check rod, a spring, an assembly housing, a piston disc and a wedge, the lower port is provided on the side of the check rod close to the cold water outlet, the lower port is The port is provided with a cold water channel port that communicates with the cold water outlet. The check rod, spring, piston disc and wedge are all arranged in the assembly housing. On the other hand, the spring is sleeved on the check rod, the check rod passes through the piston disc, and the piston disc is fixed on the check rod by means of a snap design and a wedge.

In some embodiments, a filter screen and a first circlip are arranged in sequence on the side of the assembly housing close to the pressure transmission port of the cold water spool, and a second circlip is provided on the side of the one-way valve close to the hot water inlet.

In some embodiments, O-rings are provided between the lower port and the contact surface of the cavity wall, between the non-return rod and the lower port, and between the assembly housing and the contact surface of the cavity wall for sealing.

In some embodiments, the pressure relief and drainage assembly includes: a pressure relief water inlet, a pressure relief valve rubber gasket, a gasket, a hexagonal cap, a pressure relief spring, a pressure relief rod, a pressure adjustment disc, an outer sealing ring, and a silicone gasket , gland, rivet and handle, the pressure relief valve rubber pad and gasket are embedded in the hexagonal cap in sequence, the hexagonal cap is sleeved on the pressure relief rod and can move left and right, the pressure relief spring is sleeved on the relief On the pressure rod and on the right part of the hexagonal cap, the pressure adjustment disc is on the right part of the pressure relief spring and is sleeved on the pressure relief rod, and the pressure relief valve rubber pad closes the pressure relief water inlet through the pressure relief spring, so The pressure regulating disc is fixed to the cavity wall of the pressure relief inner passage by threads, and an outer sealing ring, a silicone gasket and a gland are arranged on the outside of the pressure regulating disc and are sleeved on the outer end of the pressure relief rod in sequence. The channel cavity wall is fixed, the handle is fixed on the outermost end of the pressure relief rod by rivets and pressed on the gland, and an O-ring is provided between the pressure relief rod and the outer sealing ring for sealing.

In some embodiments, the hot water inlet of the hot water tee and the inner cavity of the cold water outlet of the cold water tee have internal threads to facilitate connection and fixation.

In some embodiments, the hot water inlet of the hot water tee and the hot water outlet of the water heater, and the cold water outlet of the cold water tee and the cold water inlet of the water heater are all fixedly connected by internal threads.

In some embodiments, the water heater includes any one of an electric water heater, an air energy water heater, and a flat panel solar water heater.

In some embodiments, the hot water outlet of the hot water tee communicates with the hot water use terminal through the hot water pipeline, and the cold water inlet of the cold water tee communicates with the cold water water supply pipeline.

In some embodiments, the hot water tee pressure transmission port of the hot water tee communicates with the cold water tee pressure transmission port of the cold water tee through a connecting pipeline.

The beneficial effects of the present invention are as follows: 1. The one-way valve of the present invention cooperates with the automatic switch valve core to realize the one-way check function, and the pressure relief water outlet of the present invention has a pressure relief and drainage assembly inside, which can realize automatic and safe external pressure relief and manual The water release function, the automatic switch valve core of the present invention also has the function of safe internal pressure relief.

2. The check rod of the present invention has a special design for reverse cold water seepage, and the design amount of reverse cold water seepage should ensure that it does not affect the normal outlet temperature of hot water for users. Through reverse cold water seepage, even if the water heater has leaked, as long as the user closes the hot water use terminal, the water pressure at the hot water outlet, the water pressure at the P3 end, the water pressure at the P2 end, and the water pressure at the P1 end can pass through the reverse cold water. The design of water seepage is finally equal (P1, P2, P3 are marked in Figure 3) to ensure that the water pressure at both ends of the check rod is balanced. Under the reverse pressure of the spring, the check rod moves to the right and closes the cold water inlet. Water channel opening, stop supplying cold water to the water heater.

3. The water heater automatic switch and pressure relief safety valve of the present invention are installed on the hot water outlet and the cold water inlet of the water heater respectively through the inner thread. The installation is simple and beautiful, and it has both water supply to the water heater. The function of automatic switch control, as well as the one-way check, safe pressure relief, and manual water discharge of the water heater safety valve, the above functions make the water heater safe and convenient to use, and can replace the use of the ordinary electric water heater safety valve currently on the market. Install.

Description of drawings

1 is a schematic structural diagram of Embodiment 1 of the present invention,

Fig. 2 is the exploded view of the first embodiment of the present invention,

3 is a schematic diagram of the working principle of Embodiment 1 of the present invention,

4 is a schematic structural diagram of Embodiment 2 of the present invention,

Fig. 5 is the exploded view of the second embodiment of the present invention,

Fig. 6 is the working principle diagram of the second embodiment of the present invention,

1 to 3: hot water tee 1, cold water tee 2, hot water inlet 3, hot water outlet 4, hot water tee pressure transmission port 5, check valve 6, cold water outlet 7, cold water Inlet 8, cold water spool pressure transmission port 9, automatic switch valve core 10, lower port 11, check rod 12, spring 13, assembly housing 14, piston disc 15, wedge 16, filter 17, first circlip 18. Cold water channel port 19, pressure relief water inlet 22, pressure relief valve gasket 23, gasket 24, hexagonal cap 25, pressure relief spring 26, pressure relief rod 27, pressure regulating disc 28, outer sealing ring 29, gland 30. Rivet 31, handle 32, silicone pad 33, pressure relief outlet 34, second retaining spring 35.

In Figures 4 to 6: hot water live tee 1, cold water live tee 2, hot water inlet 3, hot water outlet 4, hot water live tee pressure transmission port 5, one-way valve 6 , cold water outlet 7, cold water inlet 8, cold water live connection four-way pressure transmission port 9, automatic switch valve core 10, lower port 11, check rod 12, spring 13, assembly shell 14, piston disc 15, wedge 16, Filter screen 17, first circlip 18, cold water channel port 19, movable hexagonal nut 20, fixed joint 21A, fixed joint 21B, pressure relief water inlet 22, pressure relief valve rubber pad 23, gasket 24, hexagonal cap 25, Pressure relief spring 26 , pressure relief rod 27 , pressure adjustment disc 28 , outer sealing ring 29 , gland 30 , rivet 31 , handle 32 , silicone pad 33 , pressure relief water outlet 34 , and second circlip 35 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art fall within the protection scope of the present invention.

It should be understood by those skilled in the art that in the disclosure of the present invention, the terms "portrait", "horizontal", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by vertical, horizontal, top, bottom, inner, outer, etc. is based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and The description is simplified rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus the above terms should not be construed as limiting the invention.

It should be understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be one. The number of can be plural, and the term "one" should not be understood as a limitation on the number.

The P1 end, the P2 end and the P3 end are marked in FIG. 3 and FIG. 6 for convenience of description.

Example 1:

Implementation description: The water heater automatic switch and pressure relief safety valve of the present invention are installed on the hot water outlet and the cold water inlet of the water heater respectively through the inner thread, and the water heater has an automatic switch control for water supply. It also has the functions of one-way check, safety pressure relief, and artificial water discharge of the safety valve of the water heater. The above four major functions are described below.

Function 1, the function description of the automatic switch control of the water heater's water supply is as follows:

As shown in FIG. 1 , an automatic switch of a water heater and a pressure relief safety valve described in this embodiment includes a hot water tee 1 and a cold water tee 2. It is characterized in that the upper end of the hot water tee 1 is hot The water inlet 3, the lower end is the hot water outlet 4, the right end is the hot water tee pressure transmission port 5, the hot water inlet 3 is provided with a one-way valve 6 inside. The upper end of the cold water spool 2 is the cold water outlet 7, the lower end is the cold water inlet 8, the left end is the cold water spool pressure transmission port 9, and the cold water spool pressure transmission port is provided with an automatic switch valve core 10.

As shown in FIG. 2 , wherein the automatic switch valve core 10 includes a lower port 11 , a check rod 12 , a spring 13 , an assembly housing 14 , a piston disc 15 and a wedge 16 , and the lower port 11 is arranged near the check rod 12 . On one side of the cold water outlet 7, the lower port 11 is provided with a cold water channel port 19 that communicates with the cold water outlet 7, and the check rod 12, the spring 13, the piston disc 15 and the wedge 16 are all arranged in the assembly housing 14. Inside, the piston disc 15 is arranged on the side of the check rod 12 close to the pressure transmission port 9 of the cold water spool, the spring 13 is sleeved on the check rod 12, and the check rod 12 passes through the piston disc 15 , the piston disc 15 is fixed on the check rod 12 by means of the snap design and the wedge 16, and the automatic switch valve core 10 installed according to this structure is fast, convenient, and fixed firmly.

As an improved specific embodiment, the side of the assembly housing 10 close to the pressure transmission port 9 of the cold water spool is sequentially provided with a filter screen 17 and a first retaining spring 18, and the side of the check valve 6 close to the hot water inlet 3 is provided with There is a second retaining spring 35 .

As an improved specific embodiment, O-rings are provided between the contact surface of the lower port 11 and the cavity wall, between the check rod 12 and the lower port 11, and between the assembly shell 14 and the contact surface of the cavity wall for sealing .

As shown in FIG. 2 , there is a pressure relief and drainage assembly inside the pressure relief water outlet 22 , including: the pressure relief water inlet 22 , the pressure relief valve rubber pad 23 and the gasket 24 , the hexagonal cap 25 , the pressure relief spring 26 , and the pressure relief rod 27 , the pressure regulating plate 28, the pressure relief valve rubber pad 23 and the gasket 24 are embedded in the hexagonal cap 25 in sequence, the hexagonal cap 25 is sleeved on the pressure relief rod 27 and can move left and right, and the pressure relief spring 26 is sleeved on the pressure relief rod 27 and on the right part of the hexagonal cap 25, the pressure regulating plate 28 releases the right part of the pressure relief spring 26 and is sleeved on the pressure relief rod 27. Closed, the pressure regulating disc 28 is fixed with the inner channel cavity wall by threads, and the outer side is the outer sealing ring 29, the silicone gasket 33 and the gland 30 are sequentially sleeved on the outer end of the pressure relief rod 27, and the outer sealing ring 29 passes through The thread is fixed with the cavity wall of the pressure relief inner channel, the handle 32 is fixed on the outermost end of the pressure relief rod 27 by rivets 31 and pressed on the gland 30, and an O-shape is provided between the pressure relief rod 27 and the outer sealing ring 29 ring to seal.

The function of the check valve 6: when the hot water terminal is closed, it can prevent the reverse leakage of the internal water pressure. Due to the function of the one-way valve 6, when the hot water terminal is closed, it is ensured that the water pressure of the hot water outlet 4, the water pressure of the P3 end, the water pressure of the P2 end and the water pressure of the P1 end will not leak in the case of water leakage in the water heater tank. The pressure is reversely released through the hot water inlet (P1, P2, P3 are marked in Figure 3) to ensure that the water pressure at the inner and outer ends of the check rod 12 is balanced. Under the reverse pressure of the spring 13, the check rod 12 Move inwards, close the cold water channel port 19, and stop supplying cold water to the water heater.

As shown in Fig. 3, when the present invention is in use, the hot water inlet 3 of the hot water tee is directly installed at the hot water outlet of the water heater through the inner thread, and the cold water outlet 7 of the cold water tee is directly installed on the water heater through the inner thread At the cold water inlet of the tee, the hot water outlet 4 of the hot water tee communicates with the hot water use terminals of the user such as faucets, mixing valves, shower faucets, etc. through the hot water pipeline. The cold water inlet 8 of the cold water spool is communicated with the cold water water supply pipeline through a pipeline. The pressure transmission port 5 of the hot water tee is connected with the pressure transmission port 9 of the cold water tee through a water pipe.

When the user opens the hot water use terminal, the hot water flows out from the hot water outlet 4 of the hot water tee, and the water pressure of the hot water outlet 4 is relieved. The tap water pressure is the same, the water pressure at the P1 end is greater than the sum of the water pressure at the P2 end and the reverse pressure of the spring 13, the check rod 12 moves outward in the direction of P2, opens the cold water channel port 19, and the cold water passes through the cold water inlet 8 and the check rod 12. , Cold water channel port 19, cold water outlet 7 supply cold water to the water heater, the water heater works to heat, and the cold water is heated to become hot water. The hot water passes through the hot water inlet 3, the one-way valve 6, and the hot water outlet 4, and finally reaches the user's hot water use terminal.

When the user closes the hot water use terminal, the water at the hot water outlet 4 stops flowing, and finally the water pressure at the hot water outlet 4, the water pressure at the P3 end, the water pressure at the P2 end, and the water pressure at the P1 end are equal to the tap water pressure. The water pressure at the inner and outer ends of the check rod 12 reaches a balance. Under the reverse pressure of the spring 13, the check rod 12 moves to the right, closes the cold water channel 19, and stops supplying cold water to the water heater.

The non-return rod 12 of the present invention has a special design for reverse cold water seepage, and the design amount of reverse cold water seepage should ensure that it does not affect the normal outlet temperature of the user's hot water. Through reverse cold water seepage, even if the water heater has leaked, as long as the user closes the hot water use terminal, the water pressure at the hot water outlet 4, P3 end, P2 end, and P1 end can be reversed. The design of cold water seepage is finally equal to ensure that the water pressure at the inner and outer ends of the check rod 12 is balanced. Under the reverse pressure of the spring 13, the check rod 12 moves to the right, closes the cold water inlet port 19, and stops the supply to the water heater. cold water.

The above is the principle and realization process of the present invention for realizing the automatic switch control function for the water supply of the water heater.

Function 2: It has the one-way check function of the safety valve of the water heater.

The one-way check function of the water heater safety valve is mainly to prevent the hot water in the water heater tank from flowing back to the cold water pipeline from the cold water inlet of the water heater after the user's home tap water is cut off. As shown in Fig. 3, when the tap water in the user's home is stopped, the one-way valve 6 of the present invention is closed in the reverse direction, the hot water outlet of the water heater is not communicated with the atmosphere, and the check rod 12 is also closed in the reverse direction under the action of the spring 13, The cold water outlet of the water heater is also not connected to the atmosphere, because the siphon effect cannot be formed to absorb water, so the water in the water heater tank cannot be discharged from the hot water outlet or the cold water inlet of the water heater at this time, of course, there will be no problem of hot water backflow.

In addition, as long as the spring force of the reverse spring of the one-way valve 6 and the reverse spring 13 of the check rod 12 are set to a suitable range greater than the gravity drop pressure of the water in the water heater tank, the hot water can also be guaranteed not to flow backwards.

Function 3: It has the safety pressure relief function of the safety valve of the water heater.

The internal pressure relief function of the safety valve: As shown in Figure 3, during the heating process of the water heater, the internal pressure of the water tank will increase. When the pressure is greater than the force of the reaction spring 13 of the check rod 12, the check rod 12 will move in the opposite direction to open The cold water channel 19 releases the pressure inside the water heater tank to the cold water inlet pipeline. In addition, the check rod 12 of the present invention has a special design for reverse cold water seepage, so that the water tank of the water heater, the hot water outlet of the water heater, the one-way valve 6, the check rod 12, the cold water inlet 8 of the cold water spool 2 and the cold water inlet pipe The road is always connected, and the internal pressure of the water heater tank can also be leaked into the cold water inlet pipeline through this path.

The external pressure relief function of the safety valve: as shown in Figure 3, when the internal pressure of the water heater tank reaches the set value of the pressure relief spring (26) of the present invention, the internal pressure of the water heater tank will push the pressure relief valve rubber pad 23 to move outward and open The pressure relief water inlet (22) communicates with the water heater water tank and the pressure relief outlet (34), thereby completing the function of automatically releasing pressure to the outside.

Function 4: It has the function of manual water discharge of the safety valve of the water heater.

As shown in Figure 3: If you need to manually release the water in the water heater tank, you only need to turn off the main cold water switch of the user's home, and use a wrench to remove the hot water tee 1, so that the hot water outlet of the water heater is connected to the atmosphere, and it is opened manually. The handle 32 of the cold water tee 2 can make the water in the water heater tank communicate with the pressure relief outlet 34, drain the water in the water heater, and then re-install the hot water tee 1 and tighten the cold water. The handle 32 of the spool piece 2 can be reset.

Embodiment 2:

As shown in FIGS. 4 to 6 , compared with the first embodiment, the difference is that the second embodiment adopts the hot water live connection tee 1 and the cold water live connection 4-way piece 2, and the hot water live connection tee 1 and the cold water live The upper end of the connecting spool piece 2 is provided with a movable hexagonal nut 20, and a fixed joint 21A and a fixed joint 21B are respectively arranged between the hexagonal nut 20 and the shell, which is more convenient for installation and connection with the hot and cold water heaters. None of the components described above. In the first embodiment, the hot water inlet 3 of the hot water tee 1 and the hot water outlet of the water heater, and the cold water outlet 7 of the cold water tee 2 and the cold water inlet of the water heater are fixedly connected through internal threads. The hot water inlet 3 of the water connection tee 1 and the hot water outlet of the water heater are connected by the hexagonal nut 20. The structure and working principle of other components in the second embodiment are exactly the same as those in the first embodiment. Please refer to the first embodiment for implementation.

The present invention is not limited to the above-mentioned best embodiment, and anyone can obtain other various forms of products under the inspiration of the present invention, but no matter if any changes are made in its shape or structure, all products with the same or similar characteristics as those of the present application can be obtained. Similar technical solutions all fall within the protection scope of the present invention.

Claims (10)

1. A water heater automatic switch and pressure relief safety valve, comprising a hot water tee (1) and a cold water tee (2), wherein the upper end of the hot water tee (1) is a hot water inlet (3), the lower end is the hot water outlet (4), the right end is the hot water tee pressure transmission port (5), the hot water inlet (3) is provided with a one-way valve (6), and the cold water tee ( 2), the upper end is the cold water outlet (7), the lower end is the cold water inlet (8), the left end is the cold water spool pressure transmission port (9), the lower right end is the pressure relief outlet (34), the cold water spool pressure transmission port (9) An automatic switch valve core (10) is provided inside, and a pressure relief and drainage assembly is arranged in the inner cavity of the cold water four-way pressure relief outlet (34). 2. The water heater automatic switch and pressure relief safety valve according to claim 1, wherein the automatic switch valve core (10) comprises a lower port (11), a check rod (12), a spring (13), Assemble the housing (14), the piston disc (15) and the wedge (16), the lower port (11) is arranged on the side of the check rod (12) close to the cold water outlet (7), the lower port (11) There is a cold water channel port (19) communicating with the cold water outlet (7), and the check rod (12), spring (13), piston disc (15) and wedge (16) are all arranged in the assembly shell ( 14), the piston disc (15) is arranged on the side of the check rod (12) close to the pressure transmission port (9) of the cold water spool, and the spring (13) is sleeved on the check rod (12), so the The non-return rod (12) passes through the piston disc (15), and the piston disc (15) is assisted and fixed on the non-return rod (12) by means of a snap design and a wedge (16). 3. The water heater automatic switch and pressure relief safety valve according to claim 2, characterized in that, a filter screen ( 17) and the first retaining spring (18), the one-way valve (6) is provided with a second retaining spring (35) on the side close to the hot water inlet (3). 4. The water heater automatic switch and pressure relief safety valve according to claim 2, characterized in that, between the lower port (11) and the contact surface of the cavity wall, and between the check rod (12) and the lower port (11) An O-ring is provided for sealing between the cavity and the contact surface between the assembly housing (14) and the cavity wall. 5. The water heater automatic switch and pressure relief safety valve according to claim 1, wherein the pressure relief and drainage assembly comprises: a pressure relief water inlet (22), a pressure relief valve rubber pad (23), a gasket (24), hexagonal cap (25), pressure relief spring (26), pressure relief rod (27), pressure regulating disc (28), outer sealing ring (29), silicone gasket (33), gland (30), The rivet (31), the handle (32), the pressure relief valve rubber pad (23) and the gasket (24) are sequentially assembled and embedded in the hexagonal cap (25), and the hexagonal cap (25) is sleeved on the pressure relief rod (27) and can move left and right, the pressure relief spring (26) is sleeved on the pressure relief rod (27) and is on the right part of the hexagonal cap (25), and the pressure regulating plate (28) is on the pressure relief spring (26) ) and sleeved on the pressure relief rod (27), the pressure relief valve rubber pad (23) closes the pressure relief water inlet (22) through the pressure relief spring (26), and the pressure adjustment disc (28) ) is fixed to the cavity wall of the pressure relief inner channel by threads, and the outer side of the pressure regulating plate (28) is provided with an outer sealing ring (29), a silicone gasket (33) and a gland (30) that are sequentially sleeved on the pressure relief rod (27). At the outer end, the outer sealing ring (29) is fixed to the cavity wall of the inner channel through threads, and the handle (32) is fixed to the outermost end of the pressure relief rod (27) by means of rivets (31) and is pressed against the gland (30). ), an O-ring is provided between the pressure relief rod (27) and the outer sealing ring (29) for sealing. 6. The water heater automatic switch and pressure relief safety valve according to claim 1, wherein the hot water inlet (3) of the hot water tee (1) and the cold water outlet of the cold water tee (2) (7) The inner cavity has internal threads, which is convenient for connection and fixation. 7. The water heater automatic switch and pressure relief safety valve according to claim 1, wherein the hot water inlet (3) of the hot water tee (1) is connected to the hot water outlet of the water heater and the cold water tee (3). The cold water outlet (7) of 2) and the cold water inlet of the water heater are fixedly connected by internal threads. 8. The water heater automatic switch and pressure relief safety valve according to claim 6, wherein the water heater comprises any one of an electric water heater, an air energy water heater and a flat panel solar water heater. 9. The water heater automatic switch and pressure relief safety valve according to claim 1, wherein the hot water outlet (4) of the hot water tee (1) communicates with the hot water use terminal through a hot water pipeline , the cold water inlet (8) of the cold water cross piece (2) is communicated with the cold water water supply pipeline. 10. The water heater automatic switch and pressure relief safety valve according to claim 1, wherein the hot water tee pressure transmission port (5) of the hot water tee (1) and the cold water tee ( 2) The pressure transmission port (9) of the cold water spool is communicated through the connecting pipeline.

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