Electric water heater with water hammer buffering function

Abstract

The utility model discloses an electric water heater with water hammer buffering function, including water heater main part, water inlet valve, water outlet valve and a plurality of buffer mechanism, buffer mechanism sets up between valve body and water heater main part, wherein, buffer mechanism includes buffer pipe, buffer chamber and piston ring, is equipped with water flow channel in buffer pipe, buffer chamber surrounds the connection in buffer pipe at water flow channel, and piston ring separates cavity into water flow impact chamber and air pressure chamber in buffer chamber, when the water flow that flows through water heater main part is suddenly cut off, the water flow with water hammer impact will flow to water flow impact chamber and impact piston ring instantaneously, piston ring will move to air pressure chamber with certain barometric pressure and extrude the gas in air pressure chamber at this moment, piston ring will buffer the water hammer impact in water flow impact chamber in this process, greatly reduce the influence of water hammer impact to water heater main part, protect the internal pipeline of electric water heater, prolong the service life of electric water heater to a certain extent.

Description

Technical Field

[0001] This utility model relates to the field of electric water heater technology, and in particular to an electric water heater with a water hammer buffering function. Background Technology

[0002] As an essential hot water supply device in modern households, the lifespan and operational reliability of electric water heaters directly affect users' operating costs and safety. Given the uneven development of municipal water supply systems, especially in older residential areas and regions with relatively lagging infrastructure, the water hammer effect prevalent in water supply networks has become a key factor affecting the lifespan of electric water heaters. Water hammer originates from rapid changes in water flow velocity, generating pressure shock waves when a valve is suddenly closed. Peak pressures can reach 4-6 times the normal water pressure, but existing electric water heaters rely solely on pressure reducing valves for overpressure protection, which cannot effectively suppress water hammer impacts. Therefore, there is an urgent need for an electric water heater with water hammer buffering capabilities. Utility Model Content

[0003] The purpose of this invention is to provide an electric water heater with a water hammer buffer function, which solves the problem that existing electric water heaters cannot effectively suppress water hammer impact.

[0004] The present invention provides the following technical solution: an electric water heater with water hammer buffering function, comprising a water heater body, an inlet valve, an outlet valve, and multiple buffering mechanisms. The buffering mechanisms are respectively located between the inlet valve and the water heater body, and between the outlet valve and the water heater body. Each buffering mechanism includes a buffer tube, the interior of which is provided with a water flow channel extending along its length, and an inlet and an outlet are respectively provided at both ends of the water flow channel. The buffering mechanism also includes a buffer chamber and a piston ring. The buffer chamber is axially arranged around the periphery of the water flow channel, and the piston ring is axially movable in the buffer chamber, thereby dividing the buffer chamber into a water flow impact chamber and a pressure chamber. The water flow impact chamber is connected to the water flow channel to receive water flow and cause the water flow to impact the piston ring, so that the piston ring moves away from the water flow impact chamber and compresses the pressure chamber to buffer the water hammer impact in the water flow channel.

[0005] As described above, an electric water heater with water hammer buffering function further includes an auxiliary spring. The auxiliary spring is arranged around the air pressure chamber, with one end of the auxiliary spring abutting against the piston ring and the other end of the auxiliary spring abutting against the side of the air pressure chamber away from the piston ring.

[0006] In an electric water heater with water hammer buffering function as described above, the annular outer diameter of the air pressure chamber is larger than the annular outer diameter of the water flow impact chamber, and the annular inner diameter of the air pressure chamber is smaller than the annular inner diameter of the water flow impact chamber, so that the piston ring can abut against the connection between the air pressure chamber and the water flow impact chamber, thereby restricting the piston ring from approaching the water flow impact chamber.

[0007] As described above, in an electric water heater with a water hammer buffering function, a first sealing ring assembly is wound around the piston ring. The first sealing ring assembly is disposed on the outer and inner rings of the piston ring near the water flow impact chamber. The first sealing ring assembly abuts against the inner wall of the pressure chamber to seal and separate the pressure chamber from the water flow impact chamber.

[0008] As described above, in an electric water heater with a water hammer buffer function, a second sealing ring group is also wound around the piston ring, and a drain hole is provided at the connection between the air pressure chamber and the water flow impact chamber. When the piston ring abuts against the connection between the air pressure chamber and the water flow impact chamber, the drain hole is located between the first sealing ring group and the second sealing ring group.

[0009] As described above, in an electric water heater with a water hammer buffering function, the air pressure chamber has an air pressure regulating hole connected to the outside on the side away from the water flow impact chamber.

[0010] As described above, an electric water heater with a water hammer buffering function includes an annular check valve in the buffering mechanism. The water flow impact chamber is provided with an annular water flow passage. The check valve surrounds and abuts against the side of the water flow passage away from the water flow channel to restrict the water flow returning from the water flow impact chamber to the water flow channel.

[0011] As described above, in an electric water heater with a water hammer buffering function, the water flow impact chamber has an annular inclined surface that slopes towards the piston ring on the side of the water flow inlet near the piston ring, and the check valve abuts against the annular inclined surface.

[0012] As described above, in an electric water heater with a water hammer buffer function, the cross-section of the check valve is "J" shaped, the fixed side of the check valve is attached to the side of the water flow impact chamber away from the annular inclined surface, and the side of the check valve that abuts against the annular inclined surface is elastically oscillating.

[0013] In the electric water heater with water hammer buffering function described above, the check valve is made of rubber.

[0014] Compared with the prior art, the present invention has the following advantages: This utility model discloses an electric water heater with water hammer buffering function. Buffering mechanisms are added between the inlet valve and the water heater body, and between the water heater body and the outlet valve. The buffering mechanism includes a buffer tube, a buffer chamber, and a piston ring. The buffer tube contains a water flow channel, and the buffer chamber surrounds and connects to the water flow channel within the buffer tube. The piston ring divides the buffer chamber into a water flow impact chamber and a pressure chamber. When the water flow through the water heater body is suddenly interrupted, the water with water hammer impact will instantly flow into the water flow impact chamber and impact the piston ring. At this time, the piston ring will move towards the pressure chamber, which has a certain atmospheric pressure, and compress the gas within the pressure chamber. During this process, the piston ring buffers the water hammer impact in the water flow impact chamber, significantly reducing the impact of water hammer on the water heater body, protecting the internal piping of the electric water heater, and extending the service life of the electric water heater to a certain extent. Attached Figure Description

[0015] Figure 1 This is a three-dimensional disassembly diagram of the electric water heater of this utility model.

[0016] Figure 2 This is a front sectional view of the buffer mechanism of the electric water heater of this utility model.

[0017] Figure 3 This is a three-dimensional schematic diagram of the electric water heater of this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Water heater body; 2. Inlet valve; 3. Outlet valve; 4. Buffer mechanism; 41. Buffer tube; 42. Buffer chamber; 43. Piston ring; 44. Auxiliary spring; 45. Check valve; 411. Water flow channel; 412. Inlet; 413. Outlet; 421. Water flow impact chamber; 422. Air pressure chamber; 431. First sealing ring group; 432. Second sealing ring group; 4211. Water flow passage; 4212. Annular inclined surface; 4221. Drain hole; 4222. Air pressure regulating hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1: Please refer to the appendix Figure 1 To be continued Figure 3This embodiment provides an electric water heater with water hammer buffering function, including a water heater body 1, an inlet valve 2, an outlet valve 3, and multiple buffering mechanisms 4. The buffering mechanisms 4 are respectively located between the inlet valve 2 and the water heater body 1, and between the outlet valve 3 and the water heater body 1. Each buffering mechanism 4 includes a buffer tube 41, and a water flow channel 411 extends along the length of the buffer tube 41. An inlet 412 and an outlet 413 are respectively provided at both ends of the water flow channel 411. The buffering mechanism 4 also includes a buffer... The impingement chamber 42 and piston ring 43 are arranged axially around the periphery of the water flow channel 411. The piston ring 43 is axially movable in the buffer chamber 42, which divides the buffer chamber 42 into a water flow impact chamber 421 and a pressure chamber 422. The water flow impact chamber 421 is connected to the water flow channel 411 to receive water flow and cause the water flow to impact the piston ring 43, so that the piston ring 43 moves away from the water flow impact chamber 421 and compresses the pressure chamber 422 to buffer the water hammer impact in the water flow channel 411. In this embodiment of the electric water heater with water hammer buffering function, a buffer mechanism 4 is added between the inlet valve 2 and the water heater body 1, and between the water heater body 1 and the outlet valve 3. The buffer mechanism 4 includes a buffer tube 41, a buffer chamber 42, and a piston ring 43. The buffer tube 41 has a water flow channel 411 inside, and the buffer chamber 42 is connected to the water flow channel 411 inside the buffer tube 41. The piston ring 43 divides the buffer chamber 42 into a water flow impact chamber 421 and a pressure chamber 422. When the water flow through the main body 1 of the water heater is suddenly cut off, the water flow with water hammer impact will instantly flow to the water flow impact chamber 421 and impact the piston ring 43. At this time, the piston ring 43 will move towards the pressure chamber 422 with a certain atmospheric pressure and squeeze the gas in the pressure chamber 422. During this process, the piston ring 43 will buffer the water hammer impact in the water flow impact chamber 421, greatly reducing the impact of water hammer impact on the main body 1 of the water heater, protecting the internal pipes of the electric water heater, and extending the service life of the electric water heater to a certain extent.

[0021] The buffer mechanism 4 also includes an auxiliary spring 44, which is arranged around the pneumatic chamber 422. One end of the auxiliary spring 44 abuts against the piston ring 43, and the other end abuts against the side of the pneumatic chamber 422 away from the piston ring 43. The auxiliary spring 44 can store a certain amount of elastic potential energy, thereby assisting the piston ring 43 in rebounding and enhancing the buffering effect of the piston ring 43 against water hammer impact.

[0022] The outer diameter of the pneumatic chamber 422 is larger than the outer diameter of the water flow impact chamber 421, and the inner diameter of the pneumatic chamber 422 is smaller than the inner diameter of the water flow impact chamber 421. This allows the piston ring 43 to abut against the connection between the pneumatic chamber 422 and the water flow impact chamber 421, thus limiting the piston ring 43 from approaching the water flow impact chamber 421. When not receiving water flow impact, the piston ring 43 will maintain contact with the connection between the pneumatic chamber 422 and the water flow impact chamber 421 under the action of the pneumatic pressure of the pneumatic chamber 422.

[0023] A first sealing ring assembly 431 is wound around the piston ring 43. The first sealing ring assembly 431 is located on the outer ring and inner ring of the piston ring 43 near the water flow impact chamber 421. The first sealing ring assembly 431 abuts against the inner wall of the air pressure chamber 422 to seal and separate the air pressure chamber 422 from the water flow impact chamber 421.

[0024] Furthermore, a second sealing ring assembly 432 is also wound around the piston ring 43. The air pressure chamber 422 has a drain hole 4221 near the connection with the water flow impact chamber 421. When the piston ring 43 abuts against the connection between the air pressure chamber 422 and the water flow impact chamber 421, the drain hole 4221 is located between the first sealing ring assembly 431 and the second sealing ring assembly 432. When the piston ring 43 moves under the impact of the water flow, if the first sealing ring assembly 432 moves beyond the position of the drain hole 4221, the drain hole 4221 will discharge some of the water located in the water flow impact chamber 421, which has an auxiliary buffering effect.

[0025] The air pressure chamber 422 has an air pressure regulating hole 4222 connected to the outside on the side away from the water flow impact chamber 421. The air pressure regulating hole 4222 can be connected to an external air pressure regulating device to regulate the air pressure in the air pressure chamber 422 and protect the buffer tube 41.

[0026] The buffer mechanism 4 also includes an annular check valve 45. The water flow impact chamber 421 has an annular water flow inlet 4211. The check valve 45 surrounds and abuts against the side of the water flow inlet 4211 away from the water flow channel 411 to restrict the flow of water returning from the water flow impact chamber 421 to the water flow channel 411. The check valve 45 prevents water from entering the water flow impact chamber 421 during normal flow in the buffer pipe, thus improving the stability of the buffer mechanism 4 during normal water use in the electric water heater.

[0027] Preferably, the water flow impact chamber 421 has an annular inclined surface 4212 that is inclined toward the piston ring 43 on the side of the water flow inlet 4211 near the piston ring 43, and the check valve 45 abuts against the annular inclined surface 4212.

[0028] Preferably, the check valve 45 has a "J" shaped cross-section, with the fixed side of the check valve 45 attached to the side of the water flow impact chamber 421 away from the annular inclined surface 4212, and the check valve 45 is elastically oscillating on the side of the annular inclined surface 4212.

[0029] Preferably, the check valve 45 is made of rubber and has a certain degree of elasticity.

[0030] Preferably, the inlet valve 2 and outlet valve 3 can be selected as low-resistance slow-closing check valves, which can effectively reduce the water hammer pressure when the valve is closed, and can further reduce the damage of water hammer effect to electric water heater.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric water heater with water hammer buffering function, characterized in that: The device includes a water heater body (1), an inlet valve (2), an outlet valve (3), and multiple buffer mechanisms (4). The buffer mechanisms (4) are located between the inlet valve (2) and the water heater body (1), and between the outlet valve (3) and the water heater body (1). Each buffer mechanism (4) includes a buffer tube (41), and a water flow channel (411) extends along the length of the buffer tube (41). An inlet (412) and an outlet (413) are respectively provided at both ends of the water flow channel (411). The buffer mechanism (4) also includes a buffer chamber (42) and a piston ring (43). The buffer chamber (42) is axially arranged around the periphery of the water flow channel (411), and the piston ring (43) is axially movable in the buffer chamber (42), so that the buffer chamber (42) is divided into a water flow impact chamber (421) and a pressure chamber (422). The water flow impact chamber (421) is connected to the water flow channel (411) to receive water flow and make the water flow impact the piston ring (43), so that the piston ring (43) moves in a direction away from the water flow impact chamber (421) and compresses the pressure chamber (422) to buffer the water hammer impact in the water flow channel (411).

2. An electric water heater with water hammer buffering function according to claim 1, characterized in that: The buffer mechanism (4) further includes an auxiliary spring (44), which is arranged around the air pressure chamber (422) with one end abutting against the piston ring (43) and the other end abutting against the side of the air pressure chamber (422) away from the piston ring (43).

3. An electric water heater with water hammer buffering function according to claim 2, characterized in that: The outer diameter of the pneumatic chamber (422) is larger than the outer diameter of the water flow impact chamber (421), and the inner diameter of the pneumatic chamber (422) is smaller than the inner diameter of the water flow impact chamber (421), so that the piston ring (43) can abut against the connection between the pneumatic chamber (422) and the water flow impact chamber (421), thereby restricting the piston ring (43) from approaching the water flow impact chamber (421).

4. An electric water heater with water hammer buffering function according to claim 3, characterized in that: The piston ring (43) is wound with a first sealing ring group (431). The first sealing ring group (431) is disposed on the outer ring and inner ring of the piston ring (43) near the water flow impact chamber (421). The first sealing ring group (431) abuts against the inner wall of the air pressure chamber (422) to seal and separate the air pressure chamber (422) from the water flow impact chamber (421).

5. An electric water heater with water hammer buffering function according to claim 4, characterized in that: The piston ring (43) is also wound with a second sealing ring group (432). The air pressure chamber (422) has a drain hole (4221) near the connection with the water flow impact chamber (421). When the piston ring (43) abuts against the connection between the air pressure chamber (422) and the water flow impact chamber (421), the drain hole (4221) is located between the first sealing ring group (431) and the second sealing ring group (432).

6. An electric water heater with water hammer buffering function according to claim 4, characterized in that: The air pressure chamber (422) has an air pressure regulating hole (4222) connected to the outside on the side away from the water flow impact chamber (421).

7. An electric water heater with water hammer buffering function according to claim 1, characterized in that: The buffer mechanism (4) further includes an annular check valve (45). The water flow impact chamber (421) is provided with an annular water flow passage (4211). The check valve (45) surrounds and abuts against the side of the water flow passage (4211) away from the water flow channel (411) to restrict the water flow returning from the water flow impact chamber (421) to the water flow channel (411).

8. An electric water heater with water hammer buffering function according to claim 7, characterized in that: The water flow impact chamber (421) has an annular inclined surface (4212) that is inclined toward the piston ring (43) on the side of the water flow inlet (4211) near the piston ring (43), and the check valve (45) abuts against the annular inclined surface (4212).

9. An electric water heater with water hammer buffering function according to claim 8, characterized in that: The cross-section of the check valve (45) is "J" shaped. The fixed side of the check valve (45) is attached to the side of the water flow impact chamber (421) away from the annular inclined surface (4212). The check valve (45) is elastically swinging on the side of the annular inclined surface (4212) that abuts against it.

10. An electric water heater with water hammer buffering function according to claim 9, characterized in that: The check valve (45) is made of rubber.

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