CN107543307B

CN107543307B - Low-scale instant heating type electric water heater

Info

Publication number: CN107543307B
Application number: CN201710493938.5A
Authority: CN
Inventors: 胡振华
Original assignee: Guangdong Ruiqing Thermal Energy Technology Co ltd
Current assignee: GUANGDONG RUIQING THERMAL ENERGY TECHNOLOGY Co.,Ltd.
Priority date: 2017-06-26
Filing date: 2017-06-26
Publication date: 2020-06-02
Anticipated expiration: 2037-06-26
Also published as: CN107543307A

Abstract

The invention provides a low-scale instant heating type electric water heater, which comprises a heat preservation water tank, wherein an electric heating pipe and a magnesium rod are arranged in the heat preservation water tank; the heat preservation water tank is also internally provided with a water outlet pipe which extends along the electric heating pipe from the inner side of the water outlet and is sleeved on the periphery of the electric heating pipe; the water outlet pipe is composed of an inactive heat conduction pipe. The electric water heater not only is difficult to accumulate scale on the electric heating tube, but also can provide hot water with higher temperature at any time.

Description

Low-scale instant heating type electric water heater

Technical Field

The invention relates to the field of household appliances, in particular to an electric water heater.

Background

The electric water heater is a common household appliance, and for the current electric water heater, a heating component is an electric heating pipe; because the electric heating tube is a high-power heating part, the surface is easy to oxidize and scale deposit when water is boiled; over time, heavy scale will be produced on the surface of the electric heating tube, which not only affects the heat exchange efficiency between the electric heating tube and the water body, but also seriously affects the water quality in the water tank.

In addition, the existing water storage type electric water heater can be used as domestic hot water only when all water in the water tank reaches a high temperature; in many cases, it is difficult to meet the actual flexible needs of people.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide an instant electric water heater with low water scale, which is not only hard to accumulate water scale on an electric heating tube, but also can provide hot water with high temperature at any time.

The technical scheme adopted by the invention for solving the technical problems is as follows: the low-scale instant electric water heater comprises a heat-preservation water tank, wherein an electric heating tube and a magnesium rod are arranged in the heat-preservation water tank; the heat preservation water tank is also internally provided with a water outlet pipe which extends along the electric heating pipe from the inner side of the water outlet and is sleeved on the periphery of the electric heating pipe; the water outlet pipe is composed of an inactive heat conduction pipe.

Preferably, the water outlet pipe is a copper pipe or a ceramic pipe; not only has good thermal conductivity, but also is difficult to oxidize.

Preferably, the electric heating tubes are more than two and arranged in parallel with the magnesium rod; the periphery of each electric heating tube and each magnesium rod is respectively sleeved with one water outlet pipe; the water outlet ends of the water outlet pipes are converged by a collecting pipe and then connected to the water outlet; therefore, under the condition of improving the overall heating power, the scale on the surfaces of the electric heating tubes and the magnesium rod can be eliminated simultaneously.

Preferably, the water outlet pipe comprises an inner pipe and an outer pipe; the outer diameter of the inner pipe is equal to the inner diameter of the outer pipe; longitudinal holes are uniformly distributed on the surfaces of the inner pipe and the outer pipe in the circumferential direction respectively; when the inner pipe and the outer pipe rotate relatively to a first angle, the longitudinal bar holes on the surfaces of the inner pipe and the outer pipe are communicated with each other, so that the water outlet pipe is communicated inside and outside; when the inner pipe and the outer pipe relatively rotate to a second angle, the longitudinal strip holes on the surface of the inner pipe are completely shielded by the outer pipe wall between the longitudinal strip holes on the surface of the outer pipe, so that the water body in the water outlet pipe cannot transversely penetrate through the pipe wall of the water outlet pipe; the outer pipe and the heat-preservation water tank are relatively fixed, the inner pipe and the outer pipe are connected through a spring shaft in a shaft mode, and an impeller is further arranged in the inner pipe; the spring shaft stabilizes the inner and outer tubes at the first angle when there is no water flow in the inner tube; when the water flow is formed in the inner pipe, the water flow pushes the impeller to rotate, so that the impeller drives the inner pipe to rotate around the axis of the impeller until the inner pipe and the outer pipe relatively rotate to a second angle.

The invention has the beneficial effects that: in the water outlet process of the low-scale instant electric water heater, because the hot water can flow out from the water outlet after flowing through the water outlet pipe, and the electric heating pipe is arranged in the water outlet pipe, the water outlet flow of the electric water heater continuously flushes the electric heating pipe, so that obvious scale is difficult to form on the electric heating pipe; in addition, even if the water in the heat-preservation water tank has lower water temperature, such as about 40 ℃, the low-temperature hot water can be increased by at least 10 ℃ after flowing through the electric heating pipe during water outlet, and can be completely used as bath water (the bath water temperature is generally 45-50 ℃), so that the temporary bath requirement of people can be met.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the instant electric water heater with low water scale.

Fig. 2 is a schematic structural diagram of a second embodiment of the instant electric water heater with low water scale.

Fig. 3 is a schematic structural diagram of a third embodiment of the instant electric water heater with low water scale.

Fig. 4 is a schematic cross-sectional view of a water outlet pipe in a third embodiment of the instant electric water heater with low water scale.

Detailed Description

The invention is further illustrated with reference to the following figures and examples:

the first embodiment is as follows:

in the first embodiment shown in fig. 1, the instant electric water heater with low water scale comprises a heat preservation water tank 1, wherein a water inlet 10 and a water outlet 11 are formed on the heat preservation water tank 1; an electric heating tube 2 and a magnesium rod 3 are arranged in the heat preservation water tank 1; the heat preservation water tank 1 is also internally provided with a water outlet pipe 4 which extends along the electric heating pipe 2 from the inner side of the water outlet 11 and is sleeved on the periphery of the electric heating pipe 2; the water outlet pipe 4 is composed of an inactive heat conduction pipe.

In the electric water heater, the water outlet pipe 4 is a copper pipe or a ceramic pipe; not only has good thermal conductivity, but also is difficult to oxidize.

In the process of water outlet of the low-scale instant electric water heater, because hot water can flow out from the water outlet 11 only after flowing through the water outlet pipe 4, and the electric heating pipe 2 is arranged in the water outlet pipe 4, the water flow of the electric water heater continuously flushes the electric heating pipe 2, so that obvious scale deposition is difficult to form on the electric heating pipe 2; in addition, even if the water in the heat preservation water tank 1 has a low water temperature, such as about 40 ℃, the low-temperature hot water can be increased by at least 10 ℃ after flowing through the electric heating pipe during water outlet, and can be completely used as bath water (the bath water temperature is generally 45-50 ℃), so that the temporary bath requirement of people can be met.

Example two:

in the second embodiment shown in fig. 2, it is different from the first embodiment in that the electric heating tube 2 has more than two pieces, and is arranged in parallel with the magnesium rod 3; the periphery of each electric heating tube 2 and each magnesium rod 3 is respectively sleeved with one water outlet pipe 4; the water outlet ends of the water outlet pipes 4 are converged by a collecting pipe and then connected to the water outlet 11; thereby eliminating the scale on the surfaces of the electric heating tubes 2 and the magnesium rod 3 under the condition of improving the total heating power.

Example three:

with respect to the third embodiment shown in fig. 3 and 4, unlike the second embodiment, the water outlet pipe 4 includes an inner pipe 42 and an outer pipe 41; the outer diameter of the inner tube 42 is equal to the inner diameter of the outer tube 41;

longitudinal holes

420 and 410 are uniformly distributed on the surfaces of the inner tube 42 and the outer tube 41 in the circumferential direction; when the inner tube 42 and the outer tube 41 rotate relatively to a first angle, the

longitudinal bar holes

420 and 410 on the surfaces of the inner tube 42 and the outer tube 41 are communicated with each other, so that the water outlet pipe 4 is communicated with the inside and the outside; when the inner pipe 42 and the outer pipe 41 rotate relatively to a second angle, the longitudinal bar holes 420 on the surface of the inner pipe 42 are completely shielded by the outer pipe wall between the longitudinal bar holes 410 on the surface of the outer pipe 41, that is, in the position state shown in fig. 4, so that the water body in the outlet pipe 4 cannot transversely pass through the pipe wall of the outlet pipe; the outer pipe 41 and the heat preservation water tank 1 are relatively fixed, the inner pipe 42 is coupled with the outer pipe 41 through a spring shaft 44, and an impeller 43 is further arranged in the inner pipe 42; when there is no water flow in the inner tube 42, the spring shaft 44 stabilizes the inner tube 42 and the outer tube 1 at the first angle; at this time, the heat of the electric heating tube 2 can be quickly convectively transferred to the surrounding water area, so that the heating efficiency of the electric heating tube 2 can be improved; when the outlet water flow is formed in the inner pipe 42, the outlet water flow pushes the impeller 43 to rotate, so that the impeller 43 drives the inner pipe 42 to rotate around the axis of the impeller 43 until the inner pipe 42 and the outer pipe 41 relatively rotate to a second angle; at this time, the water flow must flow through the water outlet pipe 4 to flow out from the water outlet 11, so that the electric heating pipe 2 and the magnesium rod 3 are washed, and the problem of the water body flowing through the water outlet pipe 4 can be rapidly improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is intended to cover all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

Claims

1. An instant heating type electric water heater with low water scale comprises a heat preservation water tank (1), wherein an electric heating pipe (2) and a magnesium rod (3) are arranged in the heat preservation water tank (1); the heat preservation water tank (1) is also internally provided with a water outlet pipe (4) which extends along the electric heating pipe (2) from the inner side of the water outlet (11) and is sleeved on the periphery of the electric heating pipe (2); the water outlet pipe (4) is composed of an inactive heat conduction pipe; the method is characterized in that: the water outlet pipe (4) comprises an inner pipe (42) and an outer pipe (41); the outer diameter of the inner tube (42) is equal to the inner diameter of the outer tube (41); longitudinal holes (420, 410) are uniformly distributed on the surfaces of the inner pipe (42) and the outer pipe (41) in the circumferential direction; when the inner pipe (42) and the outer pipe (41) rotate relatively to a first angle, the longitudinal holes (420, 410) on the surfaces of the inner pipe (42) and the outer pipe (41) are communicated with each other, so that the water outlet pipe (4) is communicated with the inside and the outside; when the inner pipe (42) and the outer pipe (41) rotate to a second angle relatively, the longitudinal holes (420) on the surface of the inner pipe (42) are completely shielded by the outer pipe wall between the longitudinal holes (410) on the surface of the outer pipe, so that the water body in the water outlet pipe (4) cannot transversely pass through the pipe wall of the water outlet pipe; the outer pipe (41) and the heat-preservation water tank (1) are relatively fixed, the inner pipe (42) and the outer pipe (41) are connected through a spring shaft (44) in a shaft mode, and an impeller (43) is further arranged in the inner pipe (42); the spring shaft (44) stabilizes the inner tube (42), the outer tube (41) at the first angle when there is no water flow in the inner tube (42); when the effluent water flow is formed in the inner pipe (42), the effluent water flow pushes the impeller (43) to rotate, so that the impeller (43) drives the inner pipe (42) to rotate around the axis of the impeller until the inner pipe (42) and the outer pipe (41) relatively rotate to the second angle.

2. The low-scale immediate-heating electric water heater of claim 1, characterized in that: the water outlet pipe (4) is a copper pipe or a ceramic pipe.

3. The low-scale immediate-heating electric water heater of claim 1, characterized in that: the electric heating tubes (2) are more than two and are arranged in parallel with the magnesium rod (3); and the periphery of each electric heating tube (2) and each magnesium rod (3) is respectively sleeved with one water outlet pipe (4); the water outlet ends of the water outlet pipes (4) are converged by a collecting pipe and then connected to the water outlet (11).