A self-resetting two-way antifreeze valve and electric water heater

Abstract

A self-resetting two-way antifreeze valve and an electric water heater. The self-resetting two-way antifreeze valve comprises two water pipe cylinders, two pistons, a spring and a shell. The two water pipe cylinders are arranged relative to each other, the piston and the water pipe cylinders are slidably matched and sealed, the flange is matched with the end of the water pipe cylinder, the cylindrical spring seat is inserted into the spring, the end is matched with the flange, the end of the water pipe cylinder is inserted into the shell, and the end of the shell is matched with the arc baffle or the annular baffle. An electric water heater, which has a bottom shell, an instant electric water heater, a water pump, a conversion valve, a circulating water pipe, a three-way pipe fitting, a cold water inlet pipe, a hot water outlet pipe and a self-resetting two-way antifreeze valve as described in any one of claims 1 to 4, when the water in the water inlet pipe and the hot water outlet pipe freezes and expands, the piston is pushed to move to provide expansion space; and it can also exhaust and drain; an electric water heater, which has an antifreeze function, is suitable for cold areas in winter, and ensures explosion prevention.

Description

Technical Field

[0001] The invention relates to an electric water heater. Background Art

[0002] The current existing technology, Chinese patent application number 200910041277.8, invention name: a gas water heater with an antifreeze device, it includes a water flow pipeline, a solenoid valve, a controller, a heat exchanger, a smoke pipe, the controller is electrically connected to the solenoid valve, the main technical feature is that it also includes an antifreeze unit, the antifreeze unit includes an antifreeze pressure relief pipe, a piston, a spring, and a sealing cover, the piston is installed on the inner side of the water inlet at the front end of the antifreeze pressure relief pipe and is dynamically sealed with the antifreeze pressure relief pipe, a hole is provided on the sealing cover, the sealing cover is connected to the end of the antifreeze pressure relief pipe, the spring is installed in the antifreeze pressure relief pipe, the two ends of the spring are in contact with the inner side of the piston and the sealing cover respectively, and the antifreeze unit is connected to the water flow pipeline through the water inlet of the antifreeze pressure relief pipe. The existing problems are: it is necessary to set up several antifreeze units, the structure is complex, and the exhaust expansion space is explosion-proof. Summary of the invention

[0003] The purpose of the present invention is to provide a two-way antifreeze valve which has a simple structure, is connected with a cold water inlet pipe and a hot water outlet pipe when in use, and has exhaust and drainage functions.

[0004] The invention discloses a two-way antifreeze valve. When water in a cold water inlet pipe and a hot water outlet pipe freezes and expands, the valve pushes a piston to move, thereby providing an expansion space. The valve can also exhaust air and drain water. The electric water heater has an antifreeze function, is suitable for cold areas in winter, and ensures explosion prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 It is a cross-sectional view of the present invention.

[0006] Figure 2 It is the front view of the present invention.

[0007] Figure 3 yes Figure 1 A partial enlarged view of .

[0008] Figure 4 It is a front view of the piston of the present invention.

[0009] Figure 5 It is one of the three-dimensional views of the piston of the present invention.

[0010] Figure 6 It is the second stereogram of the piston of the present invention.

[0011] Figure 7 It is a front view of the water pipe cylinder of the present invention.

[0012] Figure 8 It is a stereogram of the water pipe cylinder of the present invention.

[0013] Fig. 9 It is a perspective view of the present invention.

[0014] Fig.10 It is one of the three-dimensional exploded views of the present invention.

[0015] Fig.11 It is the second of the three-dimensional exploded diagrams of the present invention.

[0016] Fig.12 It is a cross-sectional view of an electric water heater of the present invention. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Example 1

[0019] like Figure 1 As shown, a two-way antifreeze valve, the two-way antifreeze valve 1 includes two water pipe cylinders 2, two pistons 3, a spring 4 and a housing 5.

[0020] The outer circumferential surface of the water pipe cylinder 2 is provided with an arc baffle 21 or an annular baffle.

[0021] The piston 3 includes a flange 31 provided at one end and a cylindrical spring seat 32 provided on the flange, antifreeze silicone oil is applied to the piston 3, a common design is provided on the piston 3, and a sealing ring is provided on the piston 3;

[0022] The two water pipe cylinders 2 are arranged relative to each other, the piston 3 is slidably matched with the water pipe cylinder 2 and sealed, the flange 31 is matched with the end of the water pipe cylinder 2, the cylindrical spring seat 32 is inserted into the spring 4, and the end is matched with the flange 31, and the spring 4 keeps the piston 3 in the water pipe cylinder 2; the end of the water pipe cylinder 2 is inserted into the outer shell 5, and the end of the outer shell 5 is matched with the arc baffle 21 or the annular baffle.

[0023] As a further improvement of the present invention: the end of the cylindrical spring seat 32 is provided with a countersunk hole 33.

[0024] It also includes a built-in spring 6, both ends of which are inserted into the countersunk hole 33. The built-in spring 6 and the spring 4 are in close cooperation with the piston 3 and the water pipe cylinder 2 within the normal range of pipeline pressure; when ice forms in the pipeline, the piston moves to compress the built-in spring 6 and the spring 4, and the pressure is released to exhaust and drain. When the ice is removed, the piston 3 automatically resets under the action of the built-in spring 6 and the spring 4. The area and pressure calculation is used to fix the position of the piston during normal operation, and at the same time, the rebound force is provided to reset the piston after the antifreeze explosion is released, and the piston continues to work.

[0025] The shell 5 comprises two halves which are buckled together to form the shell. One side of the halves is hinged. A buckle hook is provided on one half of the shell and a buckle position is provided on the other half of the shell. The buckle hook and the buckle position are buckled together.

[0026] As a further improvement of the present invention: two evenly distributed elastic locking buckles 34 are provided on the flange 31 of the piston 3, the elastic locking buckle 34 includes a radial portion 341 and an axial buckle portion 342, and the radial outer surface of the axial buckle portion 342 includes a flat portion 3421 and a sloped portion 3422;

[0027] The water pipe cylinder 2 is provided with a locking seat 22, which includes a radial seat portion 221 and a locking portion 222, and the locking portion 222 is provided with a guide locking inclined surface 223;

[0028] The end of the housing 5 is provided with an axial guide groove 51;

[0029] The axial buckle portion 342 passes through the gap between the locking portion 222 and the water pipe cylinder 2, and the inclined portion 3422 is buckled and slidably matched with the guide locking inclined surface 223, which plays a role in fixing the piston and the water pipe cylinder, and can also ensure the movement of the piston; the radial portion 341 and the radial seat portion 221 are located in the guide groove 51, and the radial portion 341 of the elastic locking buckle 34 moves in the guide groove;

[0030] The water pipe cylinder 2 is provided with an overflow groove 23. The overflow groove 23 is designed so that when the anti-freeze explosion piston slides to this, water and ice debris have overflowed and released the pressure, and the piston has not completely withdrawn from the water pipe cylinder 2. After the pressure is released, the piston automatically resets.

[0031] Example 2

[0032] like Fig.12 As shown, an electric water heater is characterized by: a bottom shell 7, an instant electric water heater 8, a water pump 9, a switching valve 10, a circulating water pipe 11, a three-way pipe 12, a cold water inlet pipe 13, a hot water outlet pipe 14 and the two-way antifreeze valve 1 as described above,

[0033] The instant electric water heater 8 comprises a heat exchange tube body, one end of which is a cold water inlet end 81 and the other end of which is a hot water outlet end 82;

[0034] One end of the straight pipe of the three-way pipe fitting 12 is connected to the hot water outlet end 82 of the heat exchange pipe body, and the other end is connected to the water pipe cylinder 2. The hot water outlet pipe 14 is connected to the water pipe cylinder 2. The branch pipe of the three-way pipe fitting 12, the circulating water pipe 11 and the conversion valve 10 are connected. The conversion valve 10 is connected to the cold water inlet end 81 and the other water pipe cylinder 2; the cold water inlet pipe 13 is connected to the other water pipe cylinder 2.

[0035] like Fig.12 , combined Figure 1 As shown, when the cold water inlet and the hot water outlet freeze, the two pistons move towards each other;

[0036] The water inlet end of the cold water inlet pipe 13 is provided with a water inlet joint 131.

[0037] The diameter of the cold water inlet pipe 13 is smaller than the diameter of the water inlet joint 131, and the diameter of the cold water inlet pipe 13 is smaller than the diameter of the water pipe cylinder 2; with such a structure, the cold water inlet and the large diameter design at both ends ensure that in extreme freezing weather, the water in the pipe freezes, and the pressure and volume spread to both ends to ensure that the pipe does not break;

[0038] The inner diameter of the straight pipe of the three-way pipe fitting 12 is smaller than the diameter of the water pipe cylinder 2, ensuring that when the pipeline is frozen, the pressure is diffused to the piston 3 of the water pipe cylinder 2 and the outer pipe of the machine to ensure that it does not rupture.

[0039] The three-way pipe fitting 12, the water pipe cylinder 2 connected to the three-way pipe fitting and the hot water outlet pipe 14 are integrally formed;

[0040] The cold water inlet pipe 13 and the water pipe cylinder 2 connected with the cold water inlet pipe are integrally formed.

[0041] The heat-insulating sleeve 15 wraps the water pipe cylinder and the shell.

[0042] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, which are also considered as the protection scope of the present invention.

Claims

1. A self-resetting two-way antifreeze valve, characterized in that: The self-resetting two-way antifreeze valve comprises two water pipe cylinders, two pistons, a spring and a housing. The outer circumferential surface of the water pipe cylinder is provided with an arc baffle or an annular baffle. The piston includes a flange disposed at one end and a cylindrical spring seat disposed on the flange. Two water pipe cylinders are arranged relative to each other, the piston and the water pipe cylinder are slidably matched and sealed, the flange is matched with the end of the water pipe cylinder, the cylindrical spring seat is inserted into the spring, the end is matched with the flange, the end of the water pipe cylinder is inserted into the shell, and the end of the shell is matched with the arc baffle or the annular baffle; The end of the cylindrical spring seat is provided with a countersunk hole. It also includes an internal spring, with both ends of the internal spring inserted into the countersunk holes; The shell comprises two halves, which are buckled together to form the shell; The flange of the piston is provided with at least two evenly distributed elastic locking buckles, the elastic locking buckle comprises a radial portion and an axial buckle portion, and the radial outer surface of the axial buckle portion comprises a flat portion and an inclined portion; The water pipe cylinder is provided with a locking seat, which includes a radial seat portion and a locking portion, and the locking portion is provided with a guiding locking inclined surface; The end of the shell is provided with a guide groove along the axial direction; The axial buckle portion passes through the gap between the locking portion and the water pipe cylinder, the inclined portion is buckled with the guide locking inclined surface, the radial portion and the radial seat portion are located in the guide groove, and the radial portion of the elastic locking buckle moves in the guide groove.

2. A self-resetting two-way antifreeze valve according to claim 1, characterized in that: An overflow groove is arranged on the water pipe cylinder.

3. An electric water heater, characterized in that: The bottom shell, instant electric water heater, water pump, switching valve, circulating water pipe, three-way pipe, cold water inlet pipe, hot water outlet pipe and the self-resetting two-way antifreeze valve as described in any one of claims 1-2, The instant electric water heater comprises a heat exchange tube body, one end of which is a cold water inlet end and the other end is a hot water outlet end; One end of the straight pipe of the three-way pipe fitting is connected to the hot water outlet end of the heat exchange pipe body, and the other end is connected to the water pipe cylinder. The hot water outlet pipe is connected to the water pipe cylinder, the branch pipe, the circulating water pipe and the conversion valve are connected, and the conversion valve is connected to the cold water inlet end and another water pipe cylinder; the cold water inlet pipe is connected to another water pipe cylinder.

4. The electric water heater according to claim 3, characterized in that: The water inlet end of the cold water inlet pipe is provided with a water inlet joint. The diameter of the cold water inlet pipe is smaller than the diameter of the water inlet joint, and the diameter of the cold water inlet pipe is smaller than the diameter of the water pipe cylinder; The inner diameter of the straight pipe of the three-way pipe fitting is smaller than the diameter of the water pipe cylinder.

5. The electric water heater according to claim 3 or 4, characterized in that: The three-way pipe fitting, the water pipe cylinder connected to the three-way pipe fitting and the hot water outlet pipe are integrally formed; The cold water inlet pipe and the water pipe cylinder connected with the cold water inlet pipe are integrally formed.

6. The electric water heater according to claim 3, characterized in that: It also includes a heat-insulating sleeve, which wraps the water pipe cylinder and the outer shell.

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