CN113280505A

CN113280505A - Self-resetting bidirectional anti-freezing valve and electric water heater

Info

Publication number: CN113280505A
Application number: CN202110655882.5A
Authority: CN
Inventors: 廖国明; 区兆明
Original assignee: Zhongshan Lingfeng Electrical Appliance Co ltd
Current assignee: Zhongshan Lingfeng Electrical Appliance Co ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2021-08-20

Abstract

A self-resetting two-way anti-freezing valve and an electric water heater. The self-resetting two-way anti-freezing valve comprises two water pipe cylinders, two pistons, a spring and a shell, the two water pipe cylinders are arranged oppositely, and the pistons are slidingly matched with the water pipe cylinders 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 casing, the end of the casing is connected with the arc baffle or circular ring Baffle fit. An electric water heater, which has a bottom shell, an instant electric hot water device, a water pump, a switching valve, a circulating water pipe, a three-way pipe fitting, a cold water inlet pipe, a hot water outlet pipe, and a water heater according to any one of claims 1-4. Self-resetting two-way antifreeze valve, when the water in the water inlet pipe and the hot water outlet pipe freezes and expands, it pushes the piston to move to provide expansion space; it can also exhaust and drain; an electric water heater with antifreeze function, suitable for winter cold area to ensure explosion-proof.

Description

Self-resetting bidirectional anti-freezing valve and electric water heater

Technical Field

The invention relates to an electric water heater.

Background

In the prior art, the Chinese patent application No. 200910041277.8 discloses: the utility model provides a take freeze-proof device's gas heater, it includes water flow pipeline, solenoid valve, controller, heat exchanger, tobacco pipe, controller and solenoid valve electric connection, and the main technical characteristics is that it still includes the unit of preventing frostbite, the unit of preventing frostbite include the pressure release pipe that prevents frostbite, piston, spring, sealed lid, the piston install in the inboard of the pressure release pipe front end water inlet of preventing frostbite and with the pressure release pipe movive seal that prevents frostbite, sealed covering is equipped with the hole, sealed lid is connected in the end of preventing frostbite pressure release pipe, spring mounting is intraductal at the pressure release of preventing frostbite, the spring both ends respectively with the inboard contact of piston and close lid, the. There are problems in that: a plurality of anti-freezing units are required to be arranged, the structure is complex, and the exhaust expansion space is explosion-proof.

Disclosure of Invention

The purpose of the invention is: the bidirectional antifreezing valve is simple in structure, is communicated with a cold water inlet pipe and a hot water outlet pipe when in use, and has the functions of exhausting and draining.

The invention is realized by the following steps: .

According to the bidirectional antifreezing valve, when water in the cold water inlet pipe and the hot water outlet pipe is frozen and expands, the piston is pushed to move, and an expansion space is provided; but also can exhaust and drain water; an electric water heater has an anti-freezing function, is suitable for cold areas in winter, and ensures anti-explosion.

Drawings

Fig. 1 is a cross-sectional view of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a partially enlarged view of fig. 1.

Fig. 4 is a front view of the piston of the present invention.

Fig. 5 is one of perspective views of the piston of the present invention.

Fig. 6 is a second perspective view of the piston of the present invention.

Fig. 7 is a front view of the water tube cylinder of the present invention.

Fig. 8 is a perspective view of the water pipe cylinder of the present invention.

Fig. 9 is a perspective view of the present invention.

Fig. 10 is one of exploded perspective views of the present invention.

Fig. 11 is a second exploded perspective view of the present invention.

Fig. 12 is a cross-sectional view of an electric water heater of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Example 1

As shown in figure 1, the bidirectional antifreezing valve 1 comprises two water pipe cylinders 2, two pistons 3, a spring 4 and a shell 5,

the outer circumferential surface of the water pipe cylinder barrel 2 is provided with an arc baffle plate 21 or a circular ring baffle plate,

the piston 3 comprises a flange 31 arranged at one end part and a cylindrical seat 32 arranged on the flange, the piston 3 is coated with anti-freezing silicone oil, the piston 3 is provided with a common design, and the piston 3 is provided with a sealing ring;

the two water pipe cylinder barrels 2 are oppositely arranged, the piston 3 is in sliding fit and sealing with the water pipe cylinder barrels 2, the flange 31 is matched with the end part of the water pipe cylinder barrel 2, the cylindrical spring seat 31 is inserted into the spring 4, the end part of the cylindrical spring seat is matched with the flange 32, and the spring 4 keeps the piston 3 in the water pipe cylinder barrel 2; the end of the water pipe cylinder 2 is inserted into the shell 5, and the end of the shell 5 is matched with the arc baffle 21 or the circular ring baffle.

As a further improvement of the invention: the end of the cylindrical spring seat 32 is provided with a counterbore 33,

and an inner spring 6, wherein two ends of the inner spring 6 are inserted into the counter bores 33. A spring 6 and a spring 4 are arranged in the water pipe cylinder 2, and the piston 3 is tightly matched with the water pipe cylinder in a normal range of pipeline pressure; when the pipeline is frozen, the piston moves to compress the built-in spring 6 and the spring 4, and the pressure is released, the air is exhausted and the water is discharged. When the ice blocks are eliminated, the piston 3 automatically resets under the action of the spring 6 and the spring 4. Through area and pressure calculation, the piston position during fixed normal work, simultaneously, provide resilience force piston and reset after preventing frostbite and exploding and release, continue work.

The shell 5 comprises two half bodies, the two half bodies are buckled to form the shell, one side of each half body is hinged, a clasp is arranged on one half body, a buckle position is arranged on the other half body, and the clasp and the buckle position are buckled.

As a further improvement of the invention: the flange 31 of the piston 3 is provided with two elastic locking buckles 34 which are uniformly distributed, each elastic locking buckle 34 comprises a radial part 341 and an axial buckle part 342, and the radial outer surface of the axial buckle part 342 comprises a plane part 3421 and an inclined plane part 3422;

the water pipe cylinder barrel 2 is provided with a locking seat 22, the locking seat 22 comprises a radial seat part 221 and a locking part 222, and a guiding locking inclined surface 223 is arranged on the locking part 222;

the end part of the shell 5 is provided with a guide groove 51 along the axial direction;

the axial buckling part 342 passes through the gap between the locking part 222 and the water pipe cylinder 2, and the inclined plane part 3422 is buckled with the guide locking inclined plane 223 and is in sliding fit, so that the piston and the water pipe cylinder are fixed, and the piston can also move; 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;

and an overflow groove 23 is arranged on the water pipe cylinder barrel 2. The overflow groove 23 is designed, when the piston which prevents the frost explosion slides to the end, the water and the ice slag overflow and are decompressed, the piston does not completely exit the water pipe cylinder 2, and after the pressure release is finished, the piston automatically resets.

Example 2

As shown in fig. 12, an electric water heater is characterized in that: the device comprises a bottom shell 7, an instant electric water heating device 8, a water pump 9, a change-over valve 10, a circulating water pipe 11, a tee pipe fitting 12, a cold water inlet pipe 13, a hot water outlet pipe 14 and the bidirectional antifreezing valve 1,

the instant heating type electric water heating device 8 comprises a heat exchange tube body, wherein one end of the heat exchange tube body is a cold water inlet end 81, and the other end of the heat exchange tube body is a hot water outlet end 82;

one end of a straight pipe of the three-way pipe 12 is communicated with a hot water outlet end 82 of the heat exchange pipe body, the other end of the straight pipe is connected with the water pipe cylinder 2, a hot water outlet pipe 14 is communicated with the water pipe cylinder 2, branch pipes of the three-way pipe 12, a circulating water pipe 11 and a change-over valve 10 are communicated, and the change-over valve 10 is communicated with a cold water inlet end 81 and the other water pipe cylinder 2; the cold water inlet pipe 13 is communicated with the other water pipe cylinder 2.

As shown in fig. 12 and fig. 1, when the cold water inlet end and the hot water outlet end are frozen, the two pistons move in opposite directions;

the water inlet end of the cold water inlet pipe 13 is provided with a water inlet joint 131,

the diameter of the cold water inlet pipe 13 is smaller than that of the water inlet joint 131, and the diameter of the cold water inlet pipe 13 is smaller than that of the water pipe cylinder 2; by adopting the structure, the design that cold water enters and the diameters of the two ends are large ensures that water in the pipeline is frozen, the pressure and the volume are diffused to the two ends in extreme freezing weather, and the pipeline is ensured not to break;

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; and the pressure is ensured to be diffused to the piston 3 of the water pipe cylinder 2 and the outer pipe of the machine under the condition that the pipeline is frozen, so that the water pipe cylinder is ensured not to break.

The three-way pipe fitting 12, the water pipe cylinder 2 communicated with the three-way pipe fitting and the hot water outlet pipe 14 are integrally formed;

the cold water inlet pipe 13 and the water pipe cylinder 2 communicated with the cold water inlet pipe are integrally formed.

The insulating sleeve 15 wraps the water pipe cylinder barrel and the shell.

What has been described above is merely a preferred embodiment of the present invention. It should be noted that a person skilled in the art could make several modifications and variations without departing from the principle of the present invention, which should also be regarded as the protection scope of the present invention.

Claims

1. A self-resetting two-way antifreeze valve is characterized in that: the self-resetting two-way antifreeze valve comprises two water pipe cylinders, two pistons, a spring and a casing,

A circular arc baffle or an annular baffle is arranged on the outer circumferential surface of the water pipe cylinder.

The piston includes a flange arranged at one end and a cylindrical seat arranged on the flange,

The opposite arrangement of the two water pipe cylinders, 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 The part is inserted into the casing, and the end of the casing is matched with a circular arc baffle or an annular baffle.

2. A self-resetting two-way antifreeze valve according to claim 1, wherein the end of the cylindrical spring seat is provided with a counterbore,

It also includes an inner spring, and both ends of the inner spring are inserted into the counterbore.

3 . The self-resetting two-way antifreeze valve according to claim 1 , wherein the housing comprises two halves, and the two halves are snapped together to form the housing. 4 .

4. A self-resetting two-way antifreeze valve according to claim 1, 2 or 3, characterized in that: the flange of the piston is provided with at least two evenly distributed elastic locking buckles, and the elastic locking buckles comprise The radial part and the axial buckle part, the radial outer surface of the axial buckle part includes a flat part and an inclined part;

The water pipe cylinder is provided with a locking seat, the locking seat includes a radial seat portion and a locking portion, and the locking portion is provided with a guide locking slope;

The end of the casing is provided with a guide groove along the axial direction;

The axial buckle part passes through the gap between the locking part and the water pipe cylinder, the inclined surface is buckled with the guide locking slope, the radial part and the radial seat part are located in the guide groove, and the radial part of the elastic locking buckle is in the guide groove. move in the guide groove.

5 . The self-resetting two-way antifreeze valve according to claim 4 , wherein the water pipe cylinder is provided with an overflow groove. 6 .

6 . The self-resetting two-way antifreeze valve according to claim 1 , 2 or 3 , wherein an overflow groove is provided on the water pipe cylinder. 7 .

7. An electric water heater, characterized in that: its bottom case, the instant electric hot water device, the water pump, the switch valve, the circulating water pipe, the three-way pipe fitting, the cold water inlet pipe, the hot water outlet pipe and as in claims 1-4 Any one of the self-resetting two-way antifreeze valves,

The instant electric hot water device comprises a heat exchange pipe body, one end of the heat exchange pipe body 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 is connected with the hot water outlet end of the heat exchange pipe body, and the other end is connected with the water pipe cylinder. The water inlet end is communicated with another water pipe cylinder; the cold water inlet pipe is communicated with another water pipe cylinder.

8. The electric water heater according to claim 7, wherein 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 cylinder of the water pipe.

9. The electric water heater according to claim 7 or 8, wherein the three-way pipe fitting, the water pipe cylinder and the hot water outlet pipe communicating with the three-way pipe fitting are integrally formed;

The cold water inlet pipe and the water pipe cylinder connected with the cold water inlet pipe are integrally formed.

10. The electric water heater according to claim 7, characterized in that it further comprises a thermal insulation jacket, the thermal insulation jacket wraps the water pipe cylinder and the shell.