CN114353318A - Water heater and dry burning prevention method thereof - Google Patents

Abstract

The invention discloses a water heater and an anti-dry heating method thereof, wherein the water heater comprises: an inner container; the first heater comprises a first heating pipe arranged in the inner container, and the first heating pipe comprises a main heating part; the water inlet end of the water outlet pipe is arranged in the inner container, the water inlet end of the water outlet pipe is arranged close to the main heating part, and the water inlet of the water outlet pipe is not lower than the bottom of the main heating part; the water outlet end of the water inlet pipe is arranged in the inner container, and the water feeding port of the water inlet pipe is lower than the water inlet port of the water outlet pipe; and the water level detection device comprises a first detection terminal arranged in the water outlet pipe and a second detection terminal arranged in the water inlet pipe, and when the water in the inner container submerges the water inlet of the water outlet pipe, the first detection terminal is communicated with the second detection terminal. Thus, dry burning can be avoided.

Description

Water heater and dry burning prevention method thereof

Technical Field

The invention relates to the technical field of water heaters, in particular to a water heater and an anti-dry heating method thereof.

Background

In the related art, an electric water heater with a quick heating function is provided, in which a water inlet end of a water outlet pipe of the water heater is disposed near a main heating portion of the heater, so that after the main heating portion heats water in a surrounding heating area, the heated water is directly output through the water outlet pipe, thereby realizing local heating and satisfying a user's demand for quickly using hot water.

In order to avoid the influence of the heated hot water on the quick heating function, the main heating portion of the heater is generally provided at an upper portion in the inner tank.

However, for the above water heater, the heater is usually started to operate through the inflow water flow, when a user installs the water heater for the first time, or after the inner container is cleaned, or water is supplied again after the inner container is completely used, the heater is started to operate because the flow sensor receives a flow signal during water injection, and actually the inner container is not filled with water, that is, the inner container is not filled with water and is powered on in advance, so that the heater is dried.

Disclosure of Invention

The invention mainly aims to provide a water heater, aiming at weakening or avoiding the dry burning phenomenon of the water heater.

To achieve the above object, the present invention provides a water heater, comprising:

an inner container;

the first heater comprises a first heating pipe arranged in the inner container, and the first heating pipe comprises a main heating part;

the water inlet end of the water outlet pipe is arranged in the inner container, the water inlet end of the water outlet pipe is arranged close to the main heating part, and the water inlet of the water outlet pipe is not lower than the bottom of the main heating part;

the water outlet end of the water inlet pipe is arranged in the inner container, and the water feeding port of the water inlet pipe is lower than the water inlet port of the water outlet pipe; and

the water level detection device comprises a first detection terminal arranged in the water outlet pipe and a second detection terminal arranged in the water inlet pipe, and when the water in the inner container submerges the water inlet of the water outlet pipe, the first detection terminal is communicated with the second detection terminal.

Optionally, the first detection terminal is arranged in the pipe body of the water outlet pipe, which is positioned outside the inner container, and/or the second detection terminal is arranged in the pipe body of the water inlet pipe, which is positioned outside the inner container.

Optionally, the water level detection device further comprises a resistance detection device.

Optionally, the first detection terminal is further electrically connected to the inner container, so as to detect whether the inner container leaks electricity; or,

the second detection terminal is also electrically connected with the inner container and is used for detecting whether the inner container leaks electricity.

Optionally, the water inlet of the water outlet pipe is not lower than the top of the main heating part.

Optionally, the first heater further comprises a heat collecting cup, the heat collecting cup is provided with a mounting opening, a water inlet hole and a water outlet, the mounting opening is arranged at one end of the heat collecting cup, and the water outlet is arranged at the other end of the heat collecting cup; the main heating part extends into the heat collecting cup through the mounting opening; the water inlet end of the water outlet pipe is close to the water outlet.

Optionally, the heat collecting cup is arranged transversely.

Optionally, the water outlet is disposed at a lower portion of a peripheral wall of the heat collecting cup, and a water inlet end of the water outlet pipe extends into the heat collecting cup through the water outlet.

Optionally, the heat collecting cup extends at least partially obliquely; or,

the heat collecting cup is a straight cup body in the horizontal direction.

Optionally, the heat collecting cup comprises a water outlet section and a heating section which is connected with the water outlet section and extends downwards, the water outlet is arranged on the water outlet section, and the mounting port is arranged at one end of the heating section, which is far away from the water outlet section;

the main heating part is obliquely arranged so as to obliquely extend into the heating section.

Optionally, the water outlet is arranged as an opening at one end of the heat collecting cup, the water inlet end of the water outlet pipe is arranged at one side of the heat collecting cup, and the distance between the water inlet end of the water outlet pipe and the water outlet is less than or equal to 80 mm; or,

the water inlet end of the water outlet pipe extends into the heat collecting cup through the water outlet.

Optionally, the heat collecting cup includes a cup body with an opening at one end and a first cover body covering the opening of the cup body, and the mounting opening is disposed on the first cover body.

Optionally, the first heater is fixedly connected to the first cover.

Optionally, the heat collecting cup is arranged at the upper part in the inner container; and/or the presence of a gas in the gas,

the plurality of water inlet holes are distributed at the lower part of the peripheral wall of the heat collecting cup; and/or the presence of a gas in the gas,

the ratio of the whole length of the heat collecting cup to the length of the inner container is greater than or equal to 0.25 and less than or equal to 0.6; and/or the presence of a gas in the gas,

the water heater also comprises a second heater, the second heater comprises a second heating pipe arranged in the inner container, and the second heating pipe is positioned at the bottom of the inner container; and/or the presence of a gas in the gas,

the first heater also comprises an installation part arranged at one end of the first heating pipe, and the installation part is arranged on the inner container so that the first heating pipe is arranged in the inner container; and/or the presence of a gas in the gas,

the main heating part also extends out of the mounting opening; and/or the presence of a gas in the gas,

the first heater also comprises a temperature sensing blind pipe arranged outside the heat collecting cup, and the tail end of the temperature sensing blind pipe is fixedly connected with the heat collecting cup; and/or the presence of a gas in the gas,

the pipe body of main heating portion is the folded form setting, perhaps, the pipe body of main heating portion is the setting of returning the shape, perhaps, at least one section pipe body of main heating portion is the heliciform setting.

The invention also provides an anti-dry heating method of the water heater, wherein the water heater is the water heater, and the anti-dry heating method comprises the following steps:

judging whether the first detection terminal and the second detection terminal are conducted or not;

when the first detection terminal is communicated with the second detection terminal, determining that the water in the inner container at least submerges the bottom of the main heating part; and

and controlling the water heater to heat according to the heating instruction.

According to the water heater, the water level monitoring device is arranged, the first detection terminal and the second detection terminal are respectively arranged in the water outlet pipe and the water inlet pipe, when water in the inner container does not immerse the water inlet of the water outlet pipe, the first detection terminal and the second detection terminal cannot be conducted, and then the open circuit is detected, so that the fact that the water in the inner container does not immerse the main heating part is judged, and the first heater is not started at the moment, and therefore dry burning is avoided. When the water in the inner container submerges the water inlet of the water outlet pipe, the first detection terminal is communicated with the second detection terminal, so that the fact that the water in the inner container is submerged to the main heating part is judged, and the heater can be started at the moment.

That is to say, through setting up water level monitoring devices, whether accessible first detection terminal switches on with the second detection terminal, judges whether the water in the inner bag soaks main heating portion department, so when the water logging in the inner bag has arrived main heating portion department, just control first heater work to avoid taking place the dry combustion method, thereby can weaken or avoid the dry combustion method phenomenon of water heater.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a water heater according to an embodiment of the present invention;

FIG. 2 is a partial schematic view of the water heater of FIG. 1 at the heat collecting cup;

FIG. 3 is a schematic view of a P-direction structure of the heat collecting cup of FIG. 2;

FIG. 4 is a right side view of the first heater of FIG. 1;

FIG. 5 is a schematic structural diagram of another embodiment of a water heater according to the present invention;

FIG. 6 is a partial schematic view of the water heater of FIG. 5 at the heat collecting cup;

FIG. 7 is a schematic diagram of a P-direction structure of the first heater of FIG. 6;

FIG. 8 is a schematic structural view of a water heater according to another embodiment of the present invention;

FIG. 9 is a partial schematic view of the water heater of FIG. 8 at the heat collecting cup;

FIG. 10 is a schematic view of a P-direction structure of the first heater of FIG. 9;

FIG. 11 is a schematic top view of the first heater of FIG. 8;

FIG. 12 is a schematic structural view of a water heater according to yet another embodiment of the present invention;

FIG. 13 is a schematic view of the first heater of FIG. 12; wherein, the heat collecting cup is not provided with a guide piece;

FIG. 14 is a schematic view of the first heater of FIG. 12; wherein, the heat collecting cup is provided with a guide piece;

FIG. 15 is a schematic view of a P-direction structure of the first heater of FIG. 14;

FIG. 16 is a schematic top view of the first heater of FIG. 14;

FIG. 17 is a schematic structural view of a fifth embodiment of the water heater of the present invention;

FIG. 18 is a schematic structural view of a control substrate of the water heater of the present invention;

FIG. 19 is a schematic view of the structure of the outlet pipe of FIG. 17;

FIG. 20 is a schematic view of the inlet pipe of FIG. 17;

FIG. 21 is a schematic construction of a sixth embodiment of the water heater of the present invention; wherein the water inlet end of the water outlet pipe is arranged in the heat collecting cup;

FIG. 22 is a schematic view of the first heater of FIG. 21;

FIG. 23 is a partial schematic view of the outlet of the heat collection cup of FIG. 22;

FIG. 24 is a schematic construction of a sixth embodiment of the water heater of the present invention; wherein the water inlet end of the water outlet pipe is arranged outside the heat collecting cup;

FIG. 25 is a partial schematic view of the outlet of the heat collection cup of FIG. 24;

FIG. 26 is a schematic structural view of a second embodiment of the first heater in the present invention;

FIG. 27 is a schematic top view of the first heater of FIG. 26;

fig. 28 is a schematic structural view of a third embodiment of the first heater in the present invention.

The reference numbers illustrate:

a water heater; 10. an inner container; 20. a first heater; 21. a first heating pipe; 211. a main heating section; 212. supporting the heating part; 2121. an oblique support section; 2122. a transverse extension section; 22. a heat collecting cup; 221. an installation port; 222. a water inlet hole; 2221. a scale discharge port; 223. a water outlet; 224. a water outlet section; 225. a heating section; 226. the body; 227. a first cover body; 228. a second cover body; 23. an installation part; 24. a temperature sensing blind pipe; 30. a water outlet pipe; 31. a metal outer tube; 311. an anti-blocking groove; 32. a plastic inner tube; 40. a water inlet pipe; 50. a second heater; 51. a second heating pipe; 60. a guide; 61. a guide groove; 70. a first detection terminal; 80. a second detection terminal; 90. a flow sensor; 91. a control substrate.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that if the description of "first", "second", etc. is provided in the embodiment of the present invention, the description of "first", "second", etc. is only for descriptive purposes and is not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied.

As shown in fig. 1, 5, 8, 12, 17, 21 and 24, the present invention provides a water heater.

In one embodiment of the present invention, as shown in fig. 1, the water heater 100 includes a liner 10, a first heater 20 and a water outlet pipe 30.

As shown in fig. 1 and 2, the first heater 20 includes a first heating pipe 21 disposed in the inner container 10, and the first heating pipe 21 includes a main heating portion 211.

As shown in fig. 1 and 2, the water inlet end of the water outlet pipe 30 is disposed in the inner container 10, and the water inlet end of the water outlet pipe 30 is disposed near the main heating portion 211. Specifically, the water inlet end of the water outlet pipe 30 is disposed at one side of the main heating portion 211 and is disposed near the end of the main heating portion 211, so that the water inlet of the water inlet end of the water outlet pipe 30 is disposed near the end of the main heating portion 211.

Specifically, the water heater 100 further includes a water inlet pipe 40, and a water outlet end of the water inlet pipe 40 is disposed in the inner container 10. Cold water enters the inner container 10 through the water inlet pipe 40, and heated hot water is sent out through the water outlet pipe 30.

In this way, when the water heater 100 starts the quick heating function, the first heating pipe 21 operates, the main heating part 211 heats water in the surrounding heating area, and the water inlet end of the water outlet pipe 30 is disposed near the main heating part 211, so that the hot water heated by the main heating part 211 can directly enter the water outlet pipe 30 from the water inlet end of the water outlet pipe 30 and be sent out. Thereby, the water in the inner container 10 can be locally heated, and a user can quickly obtain the required hot water.

Further, as shown in fig. 1 and 4, the first heater 20 further includes a mounting portion 23, the first heating pipe 21 is disposed on the mounting portion 23, and the mounting portion 23 is mounted on the inner container 10, so that the first heating pipe 21 is disposed in the inner container 10.

Specifically, the mounting portion 23 is a flange.

Specifically, as shown in fig. 1 and 4, the mounting portion 23 is mounted to the right end of the inner container 10.

Specifically, as shown in fig. 1, 2, and 26 to 28, the main heating part 211 is provided with an increasing structure for increasing a heating length to improve heating efficiency.

Further, as shown in fig. 1 and 2, the pipe body of the main heating part 211 is provided in a folded shape. Specifically, the free end of the first heating pipe 21 is folded to form the main heating part 211.

Specifically, the first heating pipe 21 further includes a supporting and heating part connected to the mounting part 23, the main heating part 211 is disposed at a distal end of the supporting and heating part, and the supporting and heating part is configured to position the main heating part 211 at a predetermined position in the inner container 10.

In one embodiment, as shown in fig. 1 and 2, the supporting and heating part 212 includes a transverse extension connected to the mounting part 23 and extending in a direction away from the mounting part 23, and an oblique supporting part disposed at a distal end of the transverse extension and extending obliquely upward. The main heating part 211 is provided at the end of the diagonal support section.

Specifically, the main heating part 211 includes two pipe bodies that are arranged in parallel and have ends connected to each other. Thus, the heating efficiency can be improved.

Of course, in other embodiments, the supporting and heating part 212 may only include the oblique supporting section 2121.

Of course, in other embodiments, the growing structure of the main heating part 211 may be configured in other structures, such as in the second embodiment of the first heater 20, as shown in fig. 26 and 27, the tube body of the main heating part 211 is configured in a shape of a loop, that is, the free end of the transverse heating section is configured in a shape of a loop to form the main heating part 211; as another example, in the third embodiment of the first heater 20, as shown in fig. 28, at least one section of the pipe body of the main heating section 211 is spirally disposed, that is, at least one section of the pipe body of the free end of the transverse heating section is spirally disposed (for example, the first heating pipe includes two pipe bodies disposed in parallel, and at the free end of the transverse heating section, one of the pipe bodies is spirally disposed around the other pipe body) to form the main heating section 211; and so on.

Further, the length of the diagonal support section 213 is greater than that of the main heating portion 211, so as to position the main heating portion 211 at a preset position in the inner container 10.

In a specific embodiment, the main heating part 211 may be disposed horizontally or obliquely, and the following description will be given with reference to another configuration of the first heater 20.

Further, as shown in fig. 1 to 4, the first heater 20 further includes a heat collecting cup 22, the heat collecting cup 22 has a mounting opening 221, a water inlet hole 222 and a water outlet 223, the mounting opening 221 is disposed at one end of the heat collecting cup 22, the water outlet 223 is disposed at the other end of the heat collecting cup 22, and the first heating pipe 21 extends into the heat collecting cup 22 through the mounting opening 221.

Specifically, the cup wall of the heat collecting cup 22 includes a peripheral wall and two end walls respectively disposed at two ends of the peripheral wall.

The mounting opening 221 is opened in an end wall of one end of the heat collecting cup 22, and the main heating part 211 extends into the heat collecting cup 22 through the mounting opening 221. In this way, the first heating pipe 21 can be mounted to the end wall, so that the positions of the first heating pipe 21 and the heat collecting cup 22 are relatively stable.

As shown in fig. 1 to 4, the water inlet end of the water outlet pipe 30 is disposed at the water outlet 223, so that the hot water heated by the main heating portion 211 can enter the water outlet pipe 30 relatively quickly.

Specifically, the heat collecting cup 22 is a semi-closed structure, and the inside and the outside of the cup are communicated through the mounting opening 221, the water inlet hole 222 and the water outlet 223.

Wherein, the end of the heat collecting cup 22 with the water outlet 223 is a water outlet end, and the end with the mounting port 221 is a mounting end.

When a user uses the quick heating function, cold water enters the heat collecting cup 22 from the water inlet hole 222, is heated by the main heating part 211 in the heat collecting cup 22, enters the water outlet pipe 30 from the outlet end of the heat collecting cup 22, and is sent out through the water outlet pipe 30 for the user to use.

Since the heat collecting cup 22 separates the water inside from the water outside, the main heating part 211 concentrates/mainly heats the water inside the heat collecting cup 22, the water inside the heat collecting cup 22 has a small amount, the heating speed is high, and the water temperature inside the heat collecting cup 22 can be rapidly increased.

And because the water inlet end of the water outlet pipe 30 is arranged at the water outlet 223 of the heat collecting cup 22, the water outlet pipe 30 absorbs the water in the heat collecting cup 22 to the water outlet end of the heat collecting cup 22 and then is absorbed into the water outlet pipe 30, so that the hot water in the heat collecting cup 22 and the water in other parts of the liner 10 perform relatively small amount of heat exchange and are directly sent out of the liner 10 through the water outlet pipe 30, and the energy loss in the process that the water in the heat collecting cup 22 is absorbed into the water outlet pipe 30 can be reduced.

According to the water heater 100, the main heating part 211 of the first heater 20 is arranged in the heat collecting cup 22, when a user uses a quick heating function, the main heating part 211 can intensively heat water in the heat collecting cup 22, so that the water in the heat collecting cup 22 is raised to a preset temperature in a short time for the user to use; compared to the basic design in which the main heating portion 211 is openly installed in the inner tub 10, the waiting time from when the user opens the water outlet 223 until the water heater 100 can supply hot water is greatly shortened.

Moreover, by arranging the water outlet 223 at one end of the heat collecting cup 22 and arranging the water inlet end of the water outlet pipe 30 at the water outlet 223, when the water outlet pipe 30 supplies water, the water outlet pipe 30 sucks the water in the heat collecting cup 22 to the water outlet 223 of the heat collecting cup 22 and then into the water outlet pipe 30, so that the hot water heated by the main heating part 211 and the water in other parts of the inner container 10 perform a small amount of heat exchange and are directly sent out of the inner container 10 through the water outlet pipe 30, thereby reducing the energy loss of the hot water heated by the main heating part 211 in the process of sucking the water outlet pipe 30.

In addition, since the mounting opening 221 is formed in the end wall of one end of the heat collecting cup, the first heating pipe 21 can be mounted to the end wall of the heat collecting cup, so that the positions of the first heating pipe 21 and the heat collecting cup 22 are relatively stable, and the main heating part 211 is conveniently spaced from the inner circumferential wall surface of the heat collecting cup 22.

Further, as shown in the figure, the first heating pipe 21 is fixedly connected with the end wall of the heat collecting cup 22. Thus, the positions of the first heating pipe 21 and the heat collecting cup 22 can be relatively stabilized to prevent the main heating part 211 and the heat collecting cup 22 from colliding with each other, etc. at the time of vibration.

Specifically, the first heating pipe 21 is welded to the end wall of the heat collecting cup 22 to ensure the installation strength. Of course, in other embodiments, the first heating pipe may also be fixedly connected to the end wall of the heat collecting cup 22 by other means, such as a clamping structure, a screw locking structure, or a riveting connection.

Further, as shown in the figure, the portion of the first heating pipe 21 extending into the heat collecting cup 22 is spaced from the inner peripheral wall surface of the heat collecting cup 22. Specifically, the main heating part 211 is spaced apart from an inner circumferential wall surface of the heat collecting cup 22.

Thus, the heat collecting cup can be prevented from being damaged by the scale generated on the surface of the pipe body of the main heating part 211.

Further, as shown in the figure, the heat collecting cup 22 includes a cup body 226 having an opening at one end, and a first cover 227 covering the opening of the cup body, wherein the first cover 226 is used to form an end wall of one end of the heat collecting cup 22. In this manner, the heat collecting cup 22 is provided separately, so that the heat collecting cup 22 can be easily manufactured and the heat collecting cup 22 and the first heater 20 can be easily assembled.

Specifically, the first cover 227 seals the opening of the cup body.

Further, the first heating pipe 21 is hermetically installed at the installation opening 221, so that water in the inner container 10 can only enter the heat collecting cup 22 from the water inlet hole 222, and the vibration resistance can be improved. Of course, in other embodiments, the first heating pipe 21 and the inner wall of the mounting opening 221 may also be provided with a water inlet gap.

Further, as shown, the water outlet 223 is disposed at the other end of the heat collecting cup 22. In this way, the main heating part 211 can continuously heat the water in the heat collecting cup 22 while the water flows to the water outlet 223, so that the effective heating time of the water in the heat collecting cup 22 by the main heating part 211 can be prolonged, and the heating efficiency can be improved.

Specifically, the water outlet 223 and the portion of the first heating pipe 21 extending into the heat collecting cup are spaced apart from each other in the overall length direction of the heat collecting cup. Specifically, the water outlet 223 is spaced apart from the end of the main heating part 211 in the entire length direction of the heat collecting cup.

In this way, since the water outlet 223 is disposed at the other end of the heat collecting cup 22 and the main heating part 211 is disposed in the heat collecting cup 22, the water inlet end of the water outlet pipe 30 is spaced from the main heating part 211 by a certain distance, so that the burning effect of the main heating part 211 on the water outlet pipe 30 can be reduced, and particularly, the risk of burning out the water outlet pipe 30 when the main heating part 211 is dried.

Further, as shown in fig. 1, the heat collecting cup 22 is disposed horizontally, that is, the overall length direction of the heat collecting cup 22 is consistent with the length direction of the liner 10. In this manner, the overall length of the heat collection cup 22 may be advantageously increased, thereby advantageously extending the length of time that water within the heat collection cup 22 flows as it flows toward the water outlet 223, thereby advantageously extending the heating time. Of course, in other embodiments, the heat collecting cup 22 may be vertically disposed, and so on.

Further, as shown in fig. 1, the ratio of the overall length L1 of the heat collecting cup 22 to the length L of the inner container 10 is greater than or equal to 0.25 and less than or equal to 0.7, such as 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, or 0.65. It can be understood that if the ratio is too small, the whole heat collecting cup 22 will be too short, which is not favorable for prolonging the effective flowing time of the water in the heat collecting cup 22 when flowing to the water outlet 223, and on the other hand, the volume of the heat collecting cup 22 will be too small; if the ratio is too large, the heat collecting cup 22 becomes too long as a whole, and the water in the heat collecting cup 22 is likely to be heated too slowly. Optionally, the ratio is greater than or equal to 0.3 and less than or equal to 0.5.

Further, the volume of the heat collecting cup 22 is greater than or equal to 0.18 liter and less than or equal to 0.6 liter, such as 0.2 liter, 0.25 liter, 0.3 liter, 0.35 liter, 0.4 liter, 0.45 liter, 0.5 liter or 0.55 liter. The diameter D or equivalent diameter of the heat collecting cup 22 is greater than or equal to 25 mm and less than or equal to 60 mm, such as 28 mm, 30 mm, 32 mm, 35mm, 37 mm, 40 mm, 42 mm, 45 mm, 47 mm, 50 mm, 52 mm, 55 mm, or 57 mm. It will be appreciated that the volume of the heat collection cup 22 is constrained to its diameter or equivalent diameter, thereby defining the overall length of the heat collection cup 22. Further, if the volume of the heat collecting cup 22 is too small, the hot water supply tends to be insufficient, and if the volume of the heat collecting cup 22 is too large, the water in the heat collecting cup 22 tends to be heated too slowly.

Specifically, the cross-section of the heat collecting cup 22 may be selected from a circle, a square (i.e., a square or a rectangle), an ellipse, or other regular polygons (e.g., regular pentagons, etc.).

Further, as shown in fig. 1, the heat collecting cup 22 is disposed at an upper portion of the inner container 10. In this way, on the one hand, the rising tendency of the hot water heated by the main heating part 211 can be reduced, and on the other hand, the cooperation with the second heater 50 (described in detail below) can be facilitated. Of course, in other embodiments, the heat collecting cup 22 may not be disposed at the upper portion of the inner container 10, and may be disposed at any position in the inner container 10.

Further, as shown in fig. 2, a distance L2 between the top of the heat collecting cup 22 and the top wall of the inner container 10 is greater than or equal to 2.5 mm, and less than or equal to 15 mm, such as 2.8 mm, 3 mm, 3.2 mm, 3.5 mm, 3.7 mm, 4.0 mm, 4.2 mm, 4.5 mm, 4.7 mm, 5.0 mm, 5.2 mm, 5.5 mm, 5.7 mm, 6.0 mm, 6.2 mm, 6.5 mm, 6.7 mm, 7.0 mm, 7.2 mm, 7.5 mm, 7.7 mm, 8.0 mm, 8.2 mm, 8.5 mm, 8.7 mm, 9.0 mm, 9.2 mm, 9.5 mm, 9.7 mm, 10.0 mm, 10.5 mm, 11 mm, 11.5 mm, 12.5 mm, 13.5 mm, 14.5 mm, or 14 mm. It should be noted that the distance between the top of the heat collecting cup 22 and the top wall of the inner container 10 refers to the distance between the highest position (i.e. the top) of the heat collecting cup 22 and the top wall of the inner container 10 above the position of the heat collecting cup 22.

It can be understood that the distance between the top of the heat collecting cup 22 and the top wall of the inner container 10 is not too short, and if the distance is too small, the heat collecting cup 22 and the inner container 10 may collide during vibration (such as during transportation), and enamel of the inner container 10 at the collision part may be damaged; too far away is not preferable, and too large distance will affect the water storage capacity of the inner container 10.

Specifically, the heat collecting cup 22 is generally provided at a middle portion in a front-rear direction of the inner container 10 (described in a posture in which the inner container 10 is mounted on a wall).

Further, as shown, a buffer (not shown) is provided on the top of the heat collecting cup 22. The buffer member may be made of an elastic anti-collision material, such as a silicone rubber or a rubber body, so as to improve the anti-vibration performance of the heat collecting cup 22.

Further, the thickness of the peripheral wall of the heat collecting cup is greater than or equal to 1.5 mm and less than or equal to 2 mm. In this way, heat can be better transferred.

Further, as shown in fig. 3, the water inlet holes 222 are provided in plural and distributed at the lower portion of the peripheral wall of the heat collecting cup 22. Thus, water in the inner container 10 can be conveniently sucked into the heat collecting cup 22. Specifically, the plurality of water inlet holes 222 are arranged in one or more rows.

Further, as shown in fig. 2, the mounting port 221 is disposed at the right end of the heat collecting cup 22 (i.e., the mounting end of the heat collecting cup 22 is the right end of the heat collecting cup 22), the water outlet 223 is disposed at the left end of the heat collecting cup 22 (i.e., the water outlet end of the heat collecting cup 22 is the left end of the heat collecting cup 22), the water inlet 222 is distributed at the right portion of the heat collecting cup 22, or the water inlet 222 is distributed at the middle portion and the right portion of the heat collecting cup 22. In this way, the water entering the heat collecting cup 22 can enter the water outlet pipe 30 after being heated for a period of time.

Further, the main heating portion 211 extends out of the mounting opening 221. Therefore, the water near the heat collecting cup 22 can be preheated and then enters the heat collecting cup 22, so that the quick heating effect can be improved.

Alternatively, the length of the main heating portion 211 extending out of the mounting opening 221 is equal to a difference between a distance L3 between the bending point of the diagonal support section and the main heating portion 211 and the mounting opening 221 and a radiation constant, where the radiation constant may be 8 mm to 12 mm (e.g., 8 mm, 9 mm, 10 mm, 11 mm, or 12 mm, etc.).

Further, as shown in fig. 1, the water heater 100 further includes a second heater 50, the second heater 50 includes a second heating pipe 51 disposed in the inner container 10, and the second heating pipe 51 is located at the bottom of the inner container 10.

Specifically, the water supply may be performed in a combination of the first heater 20 and the second heater 50.

Specifically, when a user needs to use a large amount of hot water (e.g., bathing), the first heater 20 and the second heater 50 may work in cooperation: for example, the first heater 20 and the second heater 50 are simultaneously turned on, and the first heater 20 is operated, so that the user can take a bath immediately by using hot water without waiting (or with a short waiting time); meanwhile, the second heater 50 heats up the water at the bottom of the inner container 10, so that the temperature of the water entering the heat collecting cup 22 from the water inlet 222 of the heat collecting cup 22 is higher, the water in the heat collecting cup 22 is heated more quickly, and finally, when the water temperature in the inner container 10 reaches the temperature set by a user, the first heater 20 can be selected to be turned off for a period of time, the stored hot water in the inner container 10 is directly used, and when the water temperature in the inner container 10 is reduced by a certain value, the first heater 20 can be controlled to be turned on again, so that the electric energy is saved through the circulation operation control.

When the user only needs to use a small amount of hot water (such as washing face, washing hands, etc.), only the first heater 20 may be controlled to be turned on to perform local heating, so as to realize rapid hot water supply.

When the user is idle, only the second heater 50 may be controlled to be turned on to heat the water in the entire inner container 10.

Further, as shown in fig. 1 and 4, the first heater 20 further includes a temperature sensing blind pipe 24 disposed outside the heat collecting cup 22.

Specifically, as shown in fig. 8, 9, 11 and the like, the tail end of the temperature sensing blind pipe 24 is fixedly connected with the heat collecting cup 22. Alternatively, the tail end of the temperature sensing blind pipe 24 and the heat collecting cup 22 can be fixedly connected together by welding, clamping or the like.

Therefore, the tail end of the temperature sensing blind pipe 24 is fixedly connected (such as jointed) with the heat collecting cup 22, so that the problem that the temperature rise is slow due to the fact that the temperature sensing blind pipe 24 is placed inside the cup body and the volume of the cup body is increased is solved, and the temperature sensor arranged in the temperature sensing blind pipe 24 can quickly sense the water temperature in the heat collecting cup 22; in addition, the anti-vibration performance of the whole first heater 20 can be enhanced, and the first heater 20 can be prevented from being broken in a vibration test because the gravity center of the cup body is far away.

Further, as shown in fig. 1, the heat collecting cup 22 is a straight cup body in the horizontal direction. In this way, the structure of the heat collection cup 22 can be simplified. Specifically, the heat collecting cup 22 includes a water outlet section 224 and a heating section 225 which are sequentially distributed in the overall length direction of the heat collecting cup 22, the water outlet 223 is opened at (a lower portion of the peripheral wall of) the water outlet section 224, the heating section 225 has an end wall, the mounting port is provided at the end wall of the heating section, and the main heating section 211 is provided in the heating section 225.

Further, as shown in fig. 1 and 2, the water inlet end of the water outlet pipe 30 extends into the heat collecting cup 22 through the water outlet 223. Therefore, water in other areas in the inner container 10 can be prevented or reduced from entering the water outlet pipe 30, so that the temperature of the water sent out from the water outlet pipe 30 is ensured.

Specifically, the water outlet pipe 30 is hermetically connected to the water outlet 223, so as to prevent water in other areas of the inner container 10 from entering the heat collecting cup 22 through the water outlet 223. Moreover, after the water outlet pipe 30 is installed, the heat collecting cup 22 is a closed cavity except the water inlet hole 222, so that the heated water can flow out through the water outlet pipe 30, the heat cannot be lost and wasted, the temperature rising speed is increased, and the electric energy utilization rate of the first heating pipe 21 during working is increased.

Further, as shown in fig. 1 and 4, the water outlet 223 is provided at a lower portion of the peripheral wall of the heat collecting cup 22. Therefore, the water outlet pipe 30 does not need to be bent, and can be directly inserted into the water inlet and outlet 223, so that the structure of the water outlet pipe 30 can be simplified, and the assembly difficulty of the water heater 100 can be reduced.

Further, as shown in fig. 2, a distance L4 between the water inlet end of the water outlet pipe 30 and the inner wall of the top of the heat collecting cup 22 is less than or equal to 8 mm, such as 1 mm, 2 mm, 2.5 mm, 2.8 mm, 3 mm, 3.2 mm, 3.5 mm, 3.7 mm, 4.0 mm, 4.2 mm, 4.5 mm, 4.7 mm, 5.0 mm, 5.2 mm, 5.5 mm, 5.7 mm, 6.0 mm, 6.2 mm, 6.5 mm, 6.7 mm, 7.0 mm, 7.2 mm, 7.5 mm, or 7.7 mm. The distance between the water inlet end of the water outlet pipe 30 and the inner wall of the top of the heat collecting cup 22 is the distance between the water inlet end of the water outlet pipe 30 and the inner wall of the heat collecting cup 22, which is opposite to the water inlet end.

Therefore, water in the heat collecting cup 22 can directly flow out from the water outlet pipe 30 after being heated, and a heat transfer channel is reduced.

In some embodiments, the water outlet 223 is also partially disposed on the end wall of the other end of the heat collecting cup 22. Thus, the installation of the outlet pipe 30 can be facilitated.

Specifically, the other end of the cup body 226 is also open, and the heat collecting cup 22 further includes a second cover 228 covering the other end opening. Thus, a notch is formed at the cup opening where the cup body 226 and the second cover 228 are matched, so as to form the water outlet 223 by enclosing with the second cup 228; alternatively, the second cover may be provided with a water outlet 223; even a notch is arranged at the cup mouth where the cup body 226 is matched with the second cover body 228, and the lower part of the second cover body 228 is lost to form the water outlet 223; and so on.

In another embodiment of the invention, the mounting of the outlet pipe 30 is further modified as shown in figures 5-7.

In this embodiment, as shown in fig. 5 to 7, the water heater 100 further includes a guiding member 60, the guiding member 60 is mounted on the heat collecting cup 22, the guiding member 60 has a guiding groove 61 disposed corresponding to the water outlet 223 and communicating with the water outlet 223, and the guiding groove 61 is at least partially in a reduced arrangement in a direction close to the water outlet 223 for guiding the water inlet end of the water outlet pipe 30 to be inserted into the water inlet 223. Therefore, when the water inlet end of the water outlet pipe 30 is inserted into the heat collecting cup 22, the water inlet end of the water outlet pipe 30 can be inserted into the guide groove 61, and then the water inlet and outlet 223 is inserted into the water inlet and outlet end of the water outlet pipe 30 under the guide effect of the guide groove 61, so that the water inlet and outlet can be inserted into the heat collecting cup 22, and the difficulty of installing the water outlet pipe 30 into the heat collecting cup 22 can be reduced.

In this embodiment, as shown in fig. 5 to 7, the water outlet 223 is also provided at a lower portion of the peripheral wall of the heat collection cup 22, and the guide 60 is provided at a lower portion of the peripheral wall of the heat collection cup 22.

In this embodiment, optionally, as shown in fig. 5 to 7, the guiding groove 61 is tapered in a direction approaching the water outlet 223, so that the difficulty of manufacturing the guiding element 60 can be reduced, and the guiding effect can be improved.

In this embodiment, in particular, as shown in fig. 5-7, the guide 60 is flared. In this way, the mass of the guide 60 can be reduced. Specifically, the aperture of the small opening end of the guide 60 is smaller than or equal to the aperture of the water outlet 223.

In this embodiment, the guide member 60 may be fixed outside the heat collecting cup 22 by welding, a snap structure, or a screw connection structure, or the guide member 60 and the heat collecting cup 22 may be integrally provided.

Of course, the water inlet end of the water outlet pipe 30 may not be inserted into the heat collecting cup 22, as shown in fig. 8 to 11, in another embodiment of the water heater 100 of the present invention, the water inlet end of the water outlet pipe 30 is disposed outside the heat collecting cup 22, and the water inlet end of the water outlet pipe 30 is disposed near the water outlet 223. In this embodiment, the water inlet of the water inlet end of the water outlet pipe 30 is arranged corresponding to the water outlet 223.

Thus, the water outlet pipe 30 can suck out the heated hot water in the heat collecting cup 22 through the water outlet 223, so as to ensure that the hot water at the preset temperature is sent out from the water outlet pipe 30. Moreover, by locating the water inlet end of the water outlet tube 30 outside the heat collection cup 22, the water delivery resistance (e.g., during normal water delivery) can be reduced, and the difficulty of assembling the water heater 100 can be reduced.

In this embodiment, as shown in fig. 8 and 9, the water outlet 223 is disposed as an opening at the other end of the heat collecting cup 22, the water inlet end of the water outlet pipe 30 is disposed at one side of the heat collecting cup 22, and the distance between the water inlet end of the water outlet pipe 30 and the water outlet 223 is less than or equal to 80 mm.

As shown in fig. 8 and 9, the water outlet 223 is disposed as an opening at one end of the heat collecting cup 22, the water inlet end of the water outlet pipe 30 is disposed at one side of the heat collecting cup 22, and a distance L5 between the water inlet end of the water outlet pipe 30 and the water outlet 223 (i.e., the water outlet end) is less than or equal to 80 mm, for example, 10 mm, 20 mm, 25 mm, 30 mm, 35mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, or 80 mm may be selected.

Therefore, the water suction pipe can be ensured to quickly suck out the water in the heat collection cup 22.

In this embodiment, as shown in fig. 8 and 9, a distance L6 between the water inlet end of the water outlet pipe 30 and the inner wall of the top of the inner container 10 is less than or equal to 8 mm, such as 1 mm, 2 mm, 2.5 mm, 2.8 mm, 3 mm, 3.2 mm, 3.5 mm, 3.7 mm, 4.0 mm, 4.2 mm, 4.5 mm, 4.7 mm, 5.0 mm, 5.2 mm, 5.5 mm, 5.7 mm, 6.0 mm, 6.2 mm, 6.5 mm, 6.7 mm, 7.0 mm, 7.2 mm, 7.5 mm or 7.7 mm. The distance between the water inlet end of the water outlet pipe 30 and the inner wall of the top of the inner container 10 is the distance between the water inlet end of the water outlet pipe 30 and the inner wall of the inner container 10, which is opposite to the water inlet end. Thus, the hot water output rate can be improved.

In yet another embodiment of the present invention, as shown in fig. 12-16, another structural or placement type of heat collection cup 22 and its corresponding first heater 20 are provided.

In this embodiment, as shown in fig. 12 and 13, the heat collecting cups 22 are (entirely) laterally arranged, and the heat collecting cups 22 extend at least partially obliquely.

In this embodiment, the heat collecting cup 22 is transversely arranged, and at least a part of the heat collecting cup 22 is inclined and extended, so that the solid impurities entering the heat collecting cup 22 are easy to slide down on the inner wall surface of the heat collecting cup 22 by gravity.

Moreover, since the heat collecting cup 22 extends at least partially obliquely, the heat collecting cup 22 has an upper end and a lower end, the upper end of the heat collecting cup 22 is the water outlet end of the heat collecting cup 22, and the lower end of the heat collecting cup 22 is the mounting end of the heat collecting cup 22, wherein the mounting port 221 is arranged at the lower end of the heat collecting cup 22, and the water outlet 223 is arranged at the upper end of the heat collecting cup 22.

In this embodiment, as shown in fig. 12 to 14, the heat collecting cup 22 includes a water outlet section 224 and a heating section 225 sequentially distributed along the entire length of the heat collecting cup 22, the water outlet 223 is opened in the water outlet section 224, the main heating portion 211 is disposed in the heating section 225, and the heating section 225 extends downward.

Thus, by providing the water outlet section 224, it is possible to conveniently provide the water outlet 223 so as to facilitate installation of the water outlet pipe 30 and also to facilitate spacing the water outlet pipe 30 from the main heating part 211; moreover, by arranging the heating section 225 to be inclined downwards, solid impurities (such as particles like silt impurities) entering the heat collecting cup 22 can slide down to the lower end of the heat collecting cup 22, so that the risk of the solid impurities flowing into the water outlet pipe 30 from the water outlet end is reduced.

In this embodiment, in particular, as shown in fig. 12 to 16, the water outlet 223 is provided at a lower portion of the peripheral wall of the water outlet section 224. Optionally, the lower portion of the water outlet section 224 is open to form a water outlet 223.

In this embodiment, specifically, as shown in fig. 12 to 14, the main heating part 211 is obliquely disposed to obliquely protrude into the heating section 225. It is understood that the main heating part 211 and the diagonal support section 213 are both inclined upward with respect to the mounting part 23.

In this way, the heating capacity of the main heating unit 211 can be improved without increasing the overall length.

In this embodiment, specifically, as shown in fig. 15, the water inlet holes 222 are provided in a plurality and distributed on the lower portion of the peripheral wall of the heating section 225.

Therefore, the water inlet hole 222 is arranged at the lower part, the water outlet 223 is arranged at the upper part, and the height difference can avoid the mixing of cold water and hot water; and when solid impurities (such as particles like silt impurities) enter the heat collecting cup 22, the solid impurities can fall from the water inlet hole 222, and cannot be accumulated in the heat collecting cup 22.

In this embodiment, the length of the outlet section 224 is shorter, and may be greater than or equal to 0.6 times the diameter or equivalent diameter of the heat collecting cup 22, and less than or equal to 2 times the diameter or equivalent diameter of the heat collecting cup 22, such as 0.8 times, 0.9 times, 1 times, 1.1 times, 1.2 times, 1.3 times or 1.5 times the diameter or equivalent diameter of the heat collecting cup 22.

Of course, in other modified embodiments, the heat collecting cup 22 can be inclined and transversely arranged (i.e. the water outlet section 224 and the heating section 225 are both inclined and inclined at the same angle).

In summary, in the water heater 100 of this embodiment, the heat collecting cup 22 is horizontally disposed, the heating section 224 of the heat collecting cup 22 extends obliquely, the water outlet 223 is disposed at the upper end of the heat collecting cup 22, and a structure with the water inlet 222 at the lower part and the water outlet 223 at the upper part is formed, so that the difference in height can prevent hot and cold water from mixing. Moreover, when solid impurities (such as particles like silt impurities) enter the heat collecting cup 22, the solid impurities can fall from the water inlet hole 222 under the action of the self weight, and cannot be accumulated in the heat collecting cup 22.

In this embodiment, further, as shown in fig. 12 to 14, the inclined angle of the inclined support section 213 is larger than that of the main heating section 211. In this way, the height of the main heating portion 211 in the inner container 10 can be increased easily and quickly. Of course, in other embodiments, the inclination angle of the diagonal support section 213 may be the same as the inclination angle of the main heating section 211.

In this embodiment, as shown in fig. 15, the water inlet hole 222 includes a scale discharging opening 2221, the scale discharging opening 2221 is provided at the lower end of the heat collecting cup 22 and located at the lower portion of the peripheral wall of the heat collecting cup 22, and the scale discharging opening 2221 is also used for discharging scale. Specifically, the dirt discharge port 2221 is disposed in the heating section 224.

It can be understood that, in the process of long-term use of the first heater 20, the pipe surface of the main heating portion 211 is easy to generate thick and large-area scale, which will crack and fall off due to the thermal expansion of the main heating portion 211 to form large-area scale, so that the fallen scale can smoothly fall out of the heat collecting cup 22 from the scale leakage opening 2221 by providing the scale leakage opening 2221 at the lower end of the heat collecting cup 22.

In this embodiment, further, the shape of the dirt release opening 2221 is circular, square, oval, kidney-shaped, or the like.

In this embodiment, further referring to fig. 10, the circumferential width D1 of the dirt discharge opening 2221 is greater than or equal to 1.5 times the pipe diameter of the first heating pipe 21 (e.g., 1.6 times, 1.7 times, 1.8 times, 1.9 times, or 2 times); and/or the axial length L7 of the dirt venting port 2221 is greater than or equal to 18 mm (e.g., 19 mm, 20 mm, 21 mm, 22 mm, 25 mm, 27 mm, or 30 mm, etc.). Thus, the scale can be easily dropped out from the scale release opening 2221.

In a variant of this embodiment, the inlet hole 222 may optionally comprise only the dirt discharge 2221.

In this embodiment, as shown in fig. 12, the height difference H between the top and bottom of the heat collection cup 22 is greater than or equal to the diameter or equivalent diameter of the heat collection cup 22.

In this embodiment, other structures of the water heater 100 can refer to the other embodiments above, and need not be described in detail herein.

In a fifth embodiment of the present invention, as shown in fig. 17 to 20, a dry heating preventing structure of the water heater 100 is designed.

In this embodiment, as shown in fig. 17, the water heater 100 includes a liner 10, a first heater 20, a water outlet pipe 30, a water inlet pipe 40, and a water level detection device.

As shown in fig. 17, the first heater 20 includes a first heating pipe 21 disposed in the inner container 10, and the first heating pipe 21 includes a main heating portion 211; the water inlet end of the water outlet pipe 30 is arranged in the inner container 10, the water inlet end of the water outlet pipe 30 is arranged close to the main heating part 211, and the water inlet of the water outlet pipe 30 is not lower than the bottom of the main heating part 211 (it can be understood that when the water is immersed in the water, the water can be immersed in the main heating part 211).

As shown in fig. 17, the water outlet end of the water inlet pipe 40 is disposed in the inner container 10, and the water supply port of the water inlet pipe 40 is lower than the water inlet port of the water outlet pipe 30 (it can be understood that when water submerges the water inlet port, the water also submerges the water supply port).

As shown in fig. 17, 19 and 20, the water level detecting device includes a first detecting terminal 70 disposed in the water outlet pipe 30 and a second detecting terminal 80 disposed in the water inlet pipe 40, and when the water in the inner container 10 submerges the water inlet of the water outlet pipe 30, the first detecting terminal 70 is conducted with the second detecting terminal 80.

So, through setting up water level monitoring device to set up first monitor terminal 70 and second monitor end in outlet pipe 30 and inlet tube 40 respectively, when the water in inner bag 10 does not submerge the water inlet of outlet pipe 30, then first monitor terminal 70 can not switch on with second monitor terminal 80, then detect and open circuit, thereby judge that the water in inner bag 10 does not soak main heating portion 211 department, and first heater 20 does not start this moment, in order to avoid dry combustion method. When the water in the inner container 10 submerges the water inlet of the water outlet pipe 30, the first detection terminal 70 is conducted with the second detection terminal 80, so that it is determined that the water in the inner container 10 is submerged to the main heating part 211, and the heater can be started.

That is, by providing the water level monitoring device, whether the water in the inner container 10 is soaked in the main heating portion 211 can be determined by whether the first detection terminal 70 and the second detection terminal 80 are conducted, so that when the water in the inner container 10 is soaked in the main heating portion 211, the first heater 20 is controlled to operate to prevent dry burning. Therefore, the safety performance of the product can be improved, and the product damage risk and after-sale caused by misoperation are reduced.

In this embodiment, the water level monitoring device includes a control unit (e.g., a control substrate 91) and the first detection terminal 70 and the second detection terminal 80 are respectively connected to the control unit, and the control unit is configured to determine whether the water in the inner container 10 is immersed in the main heating portion 211 according to the detection result (whether the water is conducted).

In this embodiment, as shown in fig. 17 and 20, the water inlet pipe 40 is further provided with a flow sensor 90.

Further, as shown in fig. 17, the water inlet of the water outlet pipe 30 is not lower than the top of the main heating part 211. In this way, when the water in the inner container 10 sinks the water inlet of the water outlet pipe 30, the water in the inner container 10 also sinks the main heating part 211, so that the dry heating prevention effect can be improved.

According to the above description of the embodiment, the main heating part 211 is provided at the upper part in the inner container 10, that is, in this embodiment, it is possible to judge whether or not the water in the inner container 10 is filled. That is, when the water level in the inner container 10 is insufficient, the first detection terminal 70 and the second detection terminal 80 cannot be conducted through the water path in the inner container 10, and it is determined that the water heater 100 is not filled with water by detecting the open circuit. When the inner container 10 is filled with water, the first detection terminal 70 and the second detection terminal 80 are connected through the water path in the inner container 10, and it is determined that the water heater 100 is filled with water.

In this embodiment, as shown in fig. 17, 19 and 20, the first detection terminal 70 is disposed in the tube body of the water outlet pipe 30 outside the inner container 10, and/or the second detection terminal 80 is disposed in the tube body of the water inlet pipe 40 outside the inner container 10. Thus, the installation difficulty can be reduced.

In this embodiment, further, the water level detection device further includes a resistance detection device. In this way, when the first detection terminal 70 and the second detection terminal 80 are conducted through the water path in the inner container 10, the control unit can detect a certain resistance value, and can determine that the water heater 100 is filled with water.

In this embodiment, further, the first detection terminal 70 is also electrically connected to the inner container 10 for detecting whether the inner container 10 leaks electricity; alternatively, the second detection terminal 80 is also electrically connected to the inner container 10 to detect whether the inner container 10 leaks electricity.

In this embodiment, specifically, the water heater 100 further has a voltage dividing circuit connected to the first detection terminal 70 or the second detection terminal 80, the voltage dividing circuit is connected to a ground terminal of the power supply circuit, an output terminal of the voltage dividing circuit is connected to the control unit, and the control unit controls the sound and light alarm unit to alarm according to whether the voltage signal at the output terminal of the voltage dividing circuit can be detected. If the inner container 10 is electrified, the leaked current or voltage can be transmitted to the voltage dividing circuit through the first detection terminal 70 or the second detection terminal 80, and the voltage signal output by the voltage dividing circuit controls the audible and visual alarm unit to give an alarm to remind a user to process the voltage signal, and meanwhile, the control unit controls the water heater 100 to stop working.

In this way, the first detection terminal 70 or the second detection terminal 80 is also used as a current detection terminal to monitor whether there is leakage current in the inner container 10 in real time, so as to improve the use safety of the product.

In this embodiment, other structures of the water heater 100 can refer to the other embodiments above, and need not be described in detail herein.

Based on the structure of the water heater 100 in this embodiment (i.e., the fifth embodiment), the present invention also provides a dry heating prevention method for a water heater, which includes:

judging whether the first detection terminal 70 and the second detection terminal 80 are conducted;

when the first detection terminal 70 is conducted with the second detection terminal 80, it is determined that the water in the inner container 10 is at least immersed in the bottom of the main heating part 211; and

and controlling the water heater to heat according to the heating instruction.

In this way, whether the water in the inner container 10 immerses the water inlet of the water outlet pipe 30 can be judged by whether the first detection terminal 70 and the second detection terminal 80 are conducted, so as to judge whether the water in the inner container 10 immerses the main heating part 211, and therefore, when the water in the inner container 10 immerses the main heating part 211, the first heater 20 is controlled to work, so as to avoid dry burning; the safety performance of the product can be improved, and the product damage risk and after sales brought by misoperation are reduced.

In a sixth embodiment of the invention, the outlet pipe 30 of the water heater 100 is designed as shown in fig. 21-25.

In this embodiment, as shown in fig. 21-25, the water heater 100 includes a bladder 10, a first heater 20, and an outlet pipe 30. The first heater 20 includes a first heating pipe 21 disposed in the inner container 10, and the first heating pipe 21 includes a main heating part 211; the water inlet end of the water outlet pipe 30 is arranged in the inner container 10, the water outlet pipe 30 comprises a metal outer pipe 31 and a plastic inner pipe 32 arranged in the metal outer pipe 31, the pipe orifice of the water inlet end of the plastic inner pipe 32 is lower than the pipe orifice of the water inlet end of the metal outer pipe 31, and the water inlet end of the water outlet pipe 30 is arranged close to the main heating part 211.

Specifically, the top end of the water inlet end of the water outlet pipe 30 is disposed near the end of the main heating portion 211.

Therefore, the water inlet end pipe orifice of the plastic inner pipe 32 of the water outlet pipe 30 is lower than the water inlet end pipe orifice of the metal outer pipe 31, so that the plastic inner pipe 32 can be prevented from being deformed due to the temperature influence of the main heating part 211, and particularly, when the first heater 20 is dried, the plastic inner pipe 32 can be prevented from being melted and deformed to block the water outlet pipe 30 due to the over-high temperature rise of the first heater 20 during the dry burning.

In this embodiment, the water heater 100 further comprises a heat collecting cup 22, and the structure of the heat collecting cup 22 can be seen in the above embodiments, and need not be described in detail here.

In this embodiment, specifically, as shown in fig. 21-23, when the water inlet end of the water outlet pipe 30 extends into the heat collecting cup 22 through the water outlet 223, the water inlet end nozzle of the plastic inner pipe 32 is located outside the heat collecting cup 22 (i.e. the height of the water inlet end nozzle of the plastic inner pipe 32 is lower than the water outlet 223). In this way, the plastic inner pipe 32 can be further distanced from the main heating portion 211 to further prevent the plastic inner pipe 32 from being burned.

As shown in fig. 24 and 25, when the water inlet end of the water outlet pipe 30 is disposed outside the heat collecting cup 22 and is located at one side of the heat collecting cup 22 corresponding to the water outlet 223, the nozzle of the water inlet end of the plastic inner pipe 32 is not higher than the bottom of the periphery of the water outlet 223. In this way, the plastic inner pipe 32 can be further distanced from the main heating portion 211 to further prevent the plastic inner pipe 32 from being burned.

In this embodiment, as shown in fig. 23 and 25, an anti-blocking groove 311 is provided at the pipe inlet of the metal outer pipe 31. Specifically, the notch of the anti-blocking groove 311 is provided at the water inlet end of the pipe wall of the metal outer pipe 31. Therefore, the water outlet pipe 30 can be prevented from being blocked, and a water inlet channel can be added. In addition, the processing is also convenient.

In this embodiment, further, the anti-blocking groove 311 has a shape of a kidney, a semi-kidney, a circle, a square, an ellipse, or the like.

In this embodiment, further, the anti-blocking grooves 311 are distributed in plurality at intervals in the circumferential direction of the metal outer tube 31. Specifically, two anti-blocking grooves 311 are symmetrically distributed on the circumference of the metal outer tube 31. Thus, the anti-blocking performance of the water outlet pipe 30 can be further improved.

In this embodiment, further, the height difference h between the water inlet end nozzle of the plastic inner tube 32 and the water inlet end nozzle of the metal outer tube 31 is greater than or equal to 50 mm. Therefore, the deformation of the plastic inner tube 32 due to the temperature influence can be avoided, and particularly, the melting, deformation and blockage of the plastic inner tube 32 caused by dry burning during quick heating can be avoided.

In this embodiment, further, the length of the plastic inner tube 32 is greater than or equal to 235 mm. Therefore, the height of the plastic inner pipe 32 of the electricity-proof wall water outlet pipe can be larger than or equal to 235mm, so as to ensure that the leakage current is smaller than the safety requirement.

In this embodiment, other structures of the water heater can refer to the other embodiments above, and need not be described in detail herein.

It should be noted that the technical solutions in the above embodiments can be combined with each other, but must be based on the realization of the technical solutions by those skilled in the art, and when the technical solutions are contradictory or can not be realized, the combination of the technical solutions should be considered to be absent and not be within the protection scope of the present invention.

The invention also provides a heater, which is the first heater in the water heater.

For example, the heater comprises a mounting part and a first heating pipe arranged on the mounting part, wherein the free end of the first heating pipe is arranged in a folded shape to form a main heating part.

For example, the main heating unit is disposed obliquely.

For another example, the heater further comprises a heat collecting cup, wherein the heat collecting cup is provided with a mounting opening, a water inlet hole and a water outlet, the mounting opening is arranged at one end of the heat collecting cup, and the water outlet is arranged at the other end of the heat collecting cup; the main heating part extends into the heat collecting cup through the mounting opening.

Etc., the specific structure of the heater can be found in the other embodiments above, and need not be described in detail herein.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (15)

1. A water heater, comprising:

an inner container;

the first heater comprises a first heating pipe arranged in the inner container, and the first heating pipe comprises a main heating part;

the water inlet end of the water outlet pipe is arranged in the inner container, the water inlet end of the water outlet pipe is close to the main heating part, and the water inlet of the water outlet pipe is not lower than the bottom of the main heating part;

the water outlet end of the water inlet pipe is arranged in the inner container, and the water feeding port of the water inlet pipe is lower than the water inlet port of the water outlet pipe; and

the water level detection device comprises a first detection terminal arranged in the water outlet pipe and a second detection terminal arranged in the water inlet pipe, and when the water in the inner container submerges the water inlet of the water outlet pipe, the first detection terminal is communicated with the second detection terminal.

2. The water heater as claimed in claim 1, wherein the first detection terminal is disposed in the tube body of the water outlet pipe outside the inner container, and/or the second detection terminal is disposed in the tube body of the water inlet pipe outside the inner container.

3. The water heater as recited in claim 2 wherein said water level sensing means further comprises resistance sensing means.

4. The water heater of claim 1, wherein the first detection terminal is further electrically connected with the inner container for detecting whether the inner container leaks electricity; or,

the second detection terminal is also electrically connected with the inner container and is used for detecting whether the inner container leaks electricity.

5. The water heater according to claim 1, wherein the inlet of the outlet pipe is not lower than the top of the main heating portion.

6. The water heater according to any one of claims 1 to 5, wherein the first heater further comprises a heat collecting cup, the heat collecting cup is provided with a mounting opening, a water inlet hole and a water outlet, the mounting opening is arranged at one end of the heat collecting cup, and the water outlet is arranged at the other end of the heat collecting cup; the main heating part extends into the heat collecting cup through the mounting opening; the water inlet end of the water outlet pipe is close to the water outlet.

7. The water heater as recited in claim 6 wherein said heat collection cup is oriented laterally.

8. The water heater as claimed in claim 7, wherein said water outlet is provided at a lower portion of a peripheral wall of said heat collecting cup, and a water inlet end of said water outlet pipe is extended into said heat collecting cup through said water outlet.

9. The water heater as claimed in claim 7, wherein said heat collecting cup is at least partially obliquely extended; or,

the heat collecting cup is a straight cup body in the horizontal direction.

10. The water heater of claim 7, wherein the heat collecting cup comprises a water outlet section and a heating section connected with the water outlet section and extending downwards, the water outlet is arranged on the water outlet section, and the mounting port is arranged at one end of the heating section far away from the water outlet section;

the main heating part is obliquely arranged so as to obliquely extend into the heating section.

11. The water heater of claim 7, wherein the water outlet is an opening at one end of the heat collecting cup, the water inlet end of the water outlet pipe is arranged at one side of the heat collecting cup, and the distance between the water inlet end of the water outlet pipe and the water outlet is less than or equal to 80 mm; or,

the water inlet end of the water outlet pipe extends into the heat collecting cup through the water outlet.

12. The water heater as claimed in claim 7, wherein the heat collecting cup includes a cup body having an opening at one end thereof, and a first cover body covering the opening of the cup body, and the mounting opening is formed in the first cover body.

13. The water heater as recited in claim 12 wherein said first heater is fixedly attached to said first cover.

14. The water heater of claim 7, wherein the heat collecting cup is arranged at the upper part in the inner container; and/or the presence of a gas in the gas,

the plurality of water inlet holes are distributed at the lower part of the peripheral wall of the heat collecting cup; and/or the presence of a gas in the gas,

the ratio of the whole length of the heat collecting cup to the length of the inner container is greater than or equal to 0.25 and less than or equal to 0.6; and/or the presence of a gas in the gas,

the water heater also comprises a second heater, the second heater comprises a second heating pipe arranged in the inner container, and the second heating pipe is positioned at the bottom of the inner container; and/or the presence of a gas in the gas,

the first heater also comprises an installation part arranged at one end of the first heating pipe, and the installation part is arranged on the inner container so that the first heating pipe is arranged in the inner container; and/or the presence of a gas in the gas,

the main heating part also extends out of the mounting opening; and/or the presence of a gas in the gas,

the first heater also comprises a temperature sensing blind pipe arranged outside the heat collecting cup, and the tail end of the temperature sensing blind pipe is fixedly connected with the heat collecting cup; and/or the presence of a gas in the gas,

the pipe body of main heating portion is the folded form setting, perhaps, the pipe body of main heating portion is the setting of returning the shape, perhaps, at least one section pipe body of main heating portion is the heliciform setting.

15. A dry burning prevention method for a water heater, wherein the water heater is the water heater according to any one of claims 1 to 14, and the dry burning prevention method comprises the following steps:

judging whether the first detection terminal and the second detection terminal are conducted or not;

when the first detection terminal is communicated with the second detection terminal, determining that the water in the inner container at least submerges the bottom of the main heating part; and

and controlling the water heater to heat according to the heating instruction.

Images