A quick heating electric water heater

Abstract

A kind of quick heating electric water heater, including inner container with gall bladder mouth, water inlet pipe, water outlet pipe and main heating pipe, the main heating pipe extends in the lower portion of the cavity of the inner container, further including quick heating heating pipe, the quick heating heating pipe is located above the main heating pipe and extends to the upper portion of the cavity of the inner container, the quick heating heating pipe includes quick heating section, the quick heating section is half-enclosed in the water inlet of the water outlet pipe with "factory" type.The technical scheme provided by the utility model compared with prior art has the following advantages:quick heating can be achieved, and water temperature is suitable for continuous output, the limiting of water outlet pipe is less, and the structure is simple and convenient for processing production.

Description

Technical Field

[0001] This utility model relates to the field of electric water heaters, and in particular to a fast-heating electric water heater. Background Technology

[0002] Electric water heaters have become indispensable household appliances in people's daily lives, playing a crucial role in improving their water usage experience. However, when faced with scenarios involving large water usage, such as continuous showers, current electric water heaters on the market are prone to problems such as insufficient hot water supply and inconsistent water temperature. Furthermore, when users turn the water heater back on after a long absence, there is a lengthy waiting time for the water to heat up, negatively impacting the user experience. Therefore, to further address the need for a stable and continuous hot water output under high water usage and rapid access to hot water after startup, many users attempt to purchase large-capacity or high-power electric water heaters. However, large-capacity water heaters are often limited by small bathroom spaces, while high-power water heaters are often unusable due to limitations in the diameter of the incoming power cable.

[0003] Therefore, providing an electric water heater that can rapidly heat cold water and continuously supply a large quantity of hot water has become a new growth point in the market. Based on this, some manufacturers have begun related research and development work targeting this growth point. Their main direction is to add a fast-heating heating element near the inlet of the outlet pipe on the basis of the main heating element. This fully utilizes the advantage of the fast-heating heating element's proximity to the inlet of the outlet pipe to rapidly heat the surrounding cold water, achieving the purpose of "rapid heating". In high-water-volume usage scenarios, both the main heating element and the fast-heating heating element are activated simultaneously to meet the demand for a continuous and large supply of hot water.

[0004] For example, Chinese invention patent application CN101055118A, entitled "Top Heating Method for Electric Water Heater and Instant Electric Water Heater," discloses that: a heater is arranged around the upper part of the outlet pipe, and when the electric water heater is in the output working state, the water body about to be output around the upper part of the outlet pipe is heated simultaneously, and the hot water in the inner tank in the heat preservation state is heated a second time to increase the outlet water temperature, thereby increasing the hot water output of the electric water heater. Instant electric water heater: includes an inner tank (7), an inlet pipe (3), an outlet pipe (6), a main heating pipe (1), a temperature control pipe (4), and a mounting flange (5). Around the upper part of the outlet pipe (6), an auxiliary heating pipe (2) is arranged around the outlet pipe to heat the hot water in the inner tank in the heat preservation state. The technical solution described in this invention application uses a full-angle surround design where the auxiliary heating pipe (2) surrounds the outlet pipe. While achieving "rapid heating," this can easily cause the water around the outlet pipe (6) to be heated to a high temperature, potentially leading to scalding for users when they first open the valve, and exacerbating the problem of unstable water supply temperature. For example, Chinese invention patent application CN108870731A, entitled "An Electric Water Heater and its Heating Pipe Assembly," discloses: a flange, a main heating pipe mounted on the flange, and an auxiliary heating pipe mounted on the flange. The auxiliary heating pipe includes: a spiral section, a secondary connecting section connected at one end to the spiral section, and the other end of the secondary connecting section connected to the flange. After installation, the spiral section surrounds the inlet of the outlet pipe of the electric water heater, and the outlet pipe is located on the first axis of the spiral section, which is a vertical line. The secondary connecting section is inclined, and the second axis of the secondary connecting section forms an angle with the first axis of the spiral section. The technical solution described in this invention application also adopts the technical solution of "a spiral segment surrounding the inlet of the water outlet pipe", which also has the problem of the water near the inlet of the water outlet pipe being heated to high temperature, resulting in a poor user experience.

[0005] In response to the aforementioned problems, some manufacturers have begun to consider how to achieve both rapid heating and a suitable, continuous water temperature supply. For example, Chinese invention patent application CN103090532A, entitled "A Rapid Electric Water Heater," discloses a system comprising an inner tank, an inlet pipe, an outlet pipe, and a heating element. The heating element consists of a bottom heating element located in the lower middle part of the inner tank and a top heating element located near the outlet pipe opening in the upper part of the inner tank. Either the bottom or top heating element is inserted horizontally through a side end cap of the inner tank. After insertion, the top heating element is positioned to the side of the outlet pipe or forms a semi-enclosed structure therewith, and the bottom heating element is positioned to the side of the inlet pipe or forms a semi-enclosed structure therewith. The bottom and / or top heating elements form a semi-enclosed structure around the inlet or outlet pipe through a U-shaped bend. Both the bottom and top heating elements are mounted on the same flange, and the entire system is mounted to a side end cap of the inner tank via the flange. The technical solution described in this invention patent application takes into account the situation where it is not necessary to remove the water outlet pipe during maintenance and replacement, so it forms a semi-enclosed structure (U-shaped bend) for the water outlet pipe. Although changing "full enclosure" to "semi-enclosed" alleviates the situation of drastic increase in water temperature and avoids scalding users, the water outlet pipe can still only be moved in one direction, and the flexibility of disassembly and assembly is still not high. For example, Chinese utility model patent CN211977276U, entitled "An Electric Heating Element and the Inner Tank of a Water Heater," discloses a design comprising: a mounting base and a rapid heating element; the rapid heating element is mounted on the mounting base; the rapid heating element includes: a surrounding heating body and a heating body connecting arm; one end of the heating body connecting arm is connected to the surrounding heating body, and the other end is connected to the mounting base; the surrounding heating body is composed of several stacked annular pipes, each annular pipe having a transition opening, the annular pipes between layers forming a gap, and the two ends of the transition opening transitioning to the two ends of the transition opening of the next layer with U-shaped arc segments, forming an installation channel between the U-shaped arc segments at different ends. While this utility model's technical solution includes a "transition opening" to make way for the water outlet pipe and indirectly reduce the possibility of a drastic increase in water temperature, the fact that the surrounding heating body is composed of several stacked annular pipes conversely increases the possibility of a drastic increase in water temperature, failing to achieve a suitable water temperature balance for the user. Utility Model Content

[0006] In view of the shortcomings of the existing technology, this utility model provides a fast-heating electric water heater that can provide both rapid heating and continuous output of water at a suitable temperature, has fewer restrictions on the water outlet pipe, and has a simple structure that is easy to process and manufacture.

[0007] The present invention adopts the following technical solution:

[0008] A fast-heating electric water heater includes an inner tank with an opening, an inlet pipe, an outlet pipe, and a main heating pipe. The main heating pipe extends below the cavity of the inner tank. The heater also includes a fast-heating pipe located above the main heating pipe and extending upwards into the cavity of the inner tank. The fast-heating pipe includes a fast-heating section that is U-shaped and partially surrounds the inlet of the outlet pipe.

[0009] The water outlet pipe extends vertically into the cavity of the inner tank from the bottom end of the inner tank, and the projection of the rapid heating section along the radial direction of the water outlet pipe forms a cross-shaped structure with the axis of the water outlet pipe.

[0010] The water inlet is located at the upper part of the cavity of the inner tank, and the rapid heating section is located below the water inlet.

[0011] The rapid heating tube further includes an inclined section, which is inclined upward and connected to the rapid heating section at the end. The angle between the inclined section and the horizontal direction is between 5º and 60º.

[0012] The rapid heating tube further includes an installation section, one end of which is connected to the inclined section, and the other end of which is mounted on a flange used to seal the inlet.

[0013] It also includes a temperature-sensing sleeve, one end of which is mounted on the flange, and the free end of which is close to the upper part of the rapid heating section. The temperature-sensing sleeve extends along the inclined section and the mounting section.

[0014] The main heating tube is mounted on a cover located below the flange, and the cover is used to seal the opening in the inner liner wall located below the liner opening.

[0015] The rapid heating section is a double-layered "plant"-shaped structure formed by bending and overlapping the end section of the rapid heating tube.

[0016] The rapid heating element is a U-shaped double-tube heating element.

[0017] The number of inner liner is at least one.

[0018] According to the technical solution described in this utility model, the following beneficial effects are achieved: the main heating pipe extends to the lower part of the inner tank cavity, and the rapid heating pipe extends above the main heating pipe and towards the upper part of the inner tank cavity. The main heating pipe and the rapid heating pipe adopt a zoned heating method to heat the water in the inner tank separately, resulting in faster and higher heating efficiency. Moreover, in the inner tank cavity, hot water easily rises to the upper part of the cavity, while cold water is located at the bottom of the cavity. Once the cold water at the bottom of the cavity is heated by the main heating pipe, it rises to the upper part of the cavity, and this, combined with the heating effect of the rapid heating pipe, further enhances the heating efficiency. The thermal effect provides favorable conditions for the continuous and rapid output of hot water. The rapid heating section of the rapid heating element is semi-enclosed in a "U" shape at the inlet of the outlet pipe. Compared with the "fully enclosed" structure in existing technologies, this not only reduces the possibility of a drastic increase in water temperature but also reduces the restriction on the outlet pipe, providing multiple clearance directions for the relative movement between the outlet pipe and the rapid heating section. The outlet pipe extends vertically into the cavity of the inner tank, and the projection of the rapid heating section along the radial direction of the outlet pipe forms a cross-shaped structure with the axis of the outlet pipe, which is beneficial for the rapid heating section to heat up. When hot water from the same water layer is output from the inlet of the outlet pipe, it is less likely to mix with water from other layers, resulting in a more uniform water temperature and a better user experience. The rapid heating section is located below the inlet, which facilitates the collection of more heated hot water by utilizing the principle of hot water rising before being discharged through the inlet. The free end of the temperature sensing sleeve is close to the top of the rapid heating section, which is conducive to detecting the true water temperature of the hot water finally discharged through the inlet and can sensitively detect water temperature changes, thus playing a positive role in improving the user's water experience. The temperature sensing sleeve extends along the inclined section and installation section of the rapid heating pipe, making it easier to disassemble and assemble. The main heating pipe is installed on the cover below the flange, which facilitates the separate installation and use of the main heating pipe and the rapid heating pipe, making maintenance and replacement easier, and also providing favorable conditions for them to work independently or in tandem. The rapid heating pipe is bent and overlapped to form a double-layer "plant" shape. On the one hand, the double-layer structure helps to improve heating efficiency and ensure rapid heating. On the other hand, the double-layer structure also improves the stability of the rapid heating pipe during the disturbance caused by the heating of the surrounding water. Attached Figure Description

[0019] Figure 1 This is a perspective view of the structure of a fast-heating electric water heater in one embodiment.

[0020] Figure 2 for Figure 1 A top view of a medium-speed electric water heater along the axial direction of the outlet pipe.

[0021] Figure 3 for Figure 1 A frontal view of a medium-speed thermoelectric water heater along the radial direction of the outlet pipe.

[0022] Figure 4 for Figure 3 A partial structural breakdown diagram of a medium-speed thermoelectric water heater.

[0023] Figure 5 Front view schematic diagram of a fast heating water heater along the radial direction of the water outlet pipe in another embodiment.

[0024] 10 Fast heating tube, X Fast heating section, Y Inclined section, Z Installation section, 20 Water outlet pipe, 200 Water inlet, 30 Inner tank, 300 Tank opening, 40 Main heating tube, 50 Water inlet pipe, 60 Flange, 70 Temperature sensing sleeve, 80 Cover, 800 Tank wall opening. Specific embodiments

[0025] The technical solutions of the present utility model will be further described below in conjunction with the accompanying drawings:

[0026] See Figure 1-5 As shown, a fast heating water heater includes an inner tank 30 with a tank opening 300, a water inlet pipe 50, a water outlet pipe 20, and a main heating tube 40. The main heating tube 40 extends in the lower part of the cavity of the inner tank 30. It further includes a fast heating tube 10, which is located above the main heating tube 40 and extends towards the upper part of the cavity of the inner tank 30. The fast heating tube 10 includes a fast heating section X, and the fast heating section X is in an "L" shape and semi - surrounds the water inlet 200 of the water outlet pipe 20. In this application, being in an "L" shape and semi - surrounding the water inlet of the water outlet pipe includes, but is not limited to, for example, the fast heating section being in a "Γ" shape, in a " " shape, etc., similar deformation cases of the "L" shape. In this application, the fast heating section of the fast heating tube is in an "L" shape and semi - surrounds the water inlet of the water outlet pipe. Compared with the "fully surrounded" structure in the prior art, it not only reduces the possibility of a sharp increase in water temperature, but also reduces the limitation on the water outlet pipe, that is, it provides multiple yielding directions for the relative movement between the water outlet pipe and the fast heating section. In this application, the main heating tube extends in the lower part of the cavity of the inner tank, and the fast heating tube is located above the main heating tube and extends towards the upper part of the cavity of the inner tank. The two adopt a "zoned heating" method to heat the water in the inner tank respectively, with higher heating efficiency. Moreover, in the cavity of the inner tank, hot water is easy to rise to the upper part of the cavity, and cold water is located in the lower part of the cavity. Once the cold water in the lower part of the cavity is heated by the main heating tube, it rises to the upper part of the cavity. Combined with the heating effect of the fast heating tube, it provides favorable conditions for the electric water heater to continuously and quickly output hot water. The "zoned heating" method in this application is also different from the situation in the prior art where, for the convenience of the installation and maintenance of the heating tubes, the positional relationship between the two heating tubes is not clearly distinguished. The technical solution of this application has higher heating efficiency and is more conducive to continuously providing hot water with stable and appropriate water temperature. In this application, the "cavity of the inner tank" refers to the space for holding water surrounded by the tank wall of the inner tank. For example, when using two or more connected inner tanks, the cavity of the inner tank refers to the overall water - holding space surrounded by the tank walls of all connected inner tanks.

[0027] See Figure 1-5As shown, the outlet pipe 20 extends vertically into the cavity of the inner tank 30 from the bottom end of the inner tank 30. The projection of the rapid heating section X along the radial direction of the outlet pipe 20 forms a cross shape with the axis of the outlet pipe 20. Preferably, the inlet pipe 50 also extends vertically into the cavity of the inner tank 30 from the bottom end of the inner tank 30. In this application, the projection of the rapid heating section along the radial direction of the outlet pipe forms a cross shape with the axis of the outlet pipe, indicating that the rapid heating section can be located near the inlet of the outlet pipe. For example, the height of the projection of the rapid heating section can be higher than the inlet, lower than the inlet, or flush with the inlet. In this application, the cross shape of the projection of the rapid heating section along the radial direction of the outlet pipe with the axis of the outlet pipe is beneficial for the rapid heating section to heat water at the same height level. When hot water is output from the inlet of the outlet pipe, it is less likely to mix with water of different temperatures from other water layers, resulting in a more uniform output water temperature and a better user experience.

[0028] See Figure 1 , 3 As shown in Figure 5, the water inlet 200 is located at the upper part of the cavity of the inner tank 30, and the rapid heating section X is located below the water inlet 200. In this application, the water inlet is located at the upper part of the cavity of the inner tank, and the rapid heating section is located below the water inlet. This facilitates the collection of more heated hot water by utilizing the principle of hot water rising, and then discharges it through the water inlet. The hot water discharged by the electric water heater is the hot water with the most significant temperature rise effect.

[0029] See Figure 1 , 3 As shown in Figure -5, the rapid heating tube 10 also includes an inclined section Y, which is inclined upward and connected to the rapid heating section X at its end. The angle between the inclined section Y and the horizontal direction is between 5º and 60º. In this application, the connection between the inclined section and the rapid heating section facilitates raising the rapid heating section to the upper part of the inner liner cavity, so as to superimpose the heating (secondary heating) of the hot water flowing to the upper part of the cavity or the heating of the residual heat water flowing to the upper part of the cavity, thereby making the heat utilization rate of the rapid heating tube higher.

[0030] See Figure 1-5 As shown, the rapid heating tube 10 also includes an installation section Z, one end of which is connected to the inclined section Y, and the other end of which is installed on the flange 60 used to seal the inlet 300.

[0031] See Figure 1-5As shown, it also includes a temperature-sensing sleeve 70. One end of the temperature-sensing sleeve 70 is mounted on the flange 60, and the free end of the temperature-sensing sleeve 70 is located near the top of the rapid heating section X. The temperature-sensing sleeve 70 extends along the inclined section Y and the installation section Z. In this application, the free end of the temperature-sensing sleeve is located near the top of the rapid heating section. Utilizing the principle of rising hot water, this facilitates the detection of the actual water temperature of the hot water finally discharged through the inlet and allows for sensitive detection of water temperature changes, which has a positive effect on improving the user's water experience. In this application, the temperature-sensing sleeve extends along the inclined section and the installation section of the rapid heating pipe, making the simultaneous assembly and disassembly of the rapid heating pipe and the temperature-sensing sleeve more convenient and quick.

[0032] See Figure 1 , 3 As shown in Figure 5, the main heating pipe 40 is mounted on a cover 80 located below the flange 60. The cover 80 is used to seal the opening 800 of the inner liner 30 wall located below the liner inlet 300. In this application, the main heating pipe is mounted on the cover below the flange, which facilitates the separate installation and use of the main heating pipe and the rapid heating pipe, and also facilitates their respective maintenance and replacement, providing favorable conditions for them to work independently or in conjunction. In this application, the rapid heating element and the main heating element are not installed on the same flange (unlike in the prior art where both heating elements are installed on the same flange and simultaneously pulled out or inserted). In one embodiment, for example, when there is one inner tank, they can be installed on the flange sealing the tank opening and the cover sealing the tank wall opening, respectively. In another embodiment, for example, when there are two or more inner tanks, they can be installed on the flange sealing the tank opening and the cover sealing the tank wall opening, respectively (when, for example, two inner tanks are used, the tank wall opening is the tank opening of the lower inner tank and the cover is the flange of the lower inner tank).

[0033] See Figure 1 , 2 As shown, the rapid heating section X is a double-layered "plant"-shaped structure formed by bending and overlapping the end section of the rapid heating tube 10. In this application, the rapid heating tube is bent and overlapped to form a double-layered "plant" shape. On the one hand, the double-layered structure is conducive to improving heating efficiency and providing a guarantee for rapid heating; on the other hand, the double-layered structure also improves the stability of the rapid heating tube during the disturbance caused by the heating of the surrounding water.

[0034] See Figure 1-5 As shown, the rapid heating element 10 adopts a U-shaped double-tube heating element. Preferably, the main heating element 40 also adopts a U-shaped double-tube heating element.

[0035] See Figure 1-5 As shown, the number of inner liners 30 is at least one. Preferably, the number of inner liners 30 is one or two.

[0036] Although the specific embodiments of this utility model have been described above, those skilled in the art can make changes to it without departing from the spirit and principle of this utility model. The scope of protection of this utility model is defined by its claims and their equivalents.

Claims

1. A fast-heating electric water heater, comprising an inner tank with an opening, an inlet pipe, an outlet pipe, and a main heating pipe, wherein the main heating pipe extends in the lower part of the cavity of the inner tank, characterized in that: It also includes a rapid heating tube, which is located above the main heating tube and extends to the upper part of the cavity of the inner tank. The rapid heating tube includes a rapid heating section, which is "U"-shaped and partially surrounds the inlet of the water outlet pipe.

2. The instant electric water heater according to claim 1, characterized in that: The water outlet pipe extends vertically into the cavity of the inner tank from the bottom end of the inner tank, and the projection of the rapid heating section along the radial direction of the water outlet pipe forms a cross-shaped structure with the axis of the water outlet pipe.

3. The instantaneous electric water heater according to claim 1 or 2, characterized in that: The water inlet is located at the upper part of the cavity of the inner tank, and the rapid heating section is located below the water inlet.

4. The instantaneous electric water heater according to claim 1 or 2, characterized in that: The rapid heating tube also includes an inclined section, which is inclined upward and connected to the rapid heating section at the end. The angle between the inclined section and the horizontal direction is between 5° and 60°.

5. The instantaneous electric water heater according to claim 4, characterized in that: The rapid heating tube also includes an installation section, one end of which is connected to the inclined section, and the other end of which is mounted on a flange used to seal the inlet.

6. The instant electric water heater according to claim 5, characterized in that: It also includes a temperature-sensing sleeve, one end of which is mounted on the flange, and the free end of which is close to the upper part of the rapid heating section. The temperature-sensing sleeve extends along the inclined section and the mounting section.

7. The instant electric water heater according to claim 5, characterized in that: The main heating tube is mounted on a cover located below the flange, and the cover is used to seal the opening in the inner liner wall located below the liner opening.

8. The instantaneous electric water heater according to any one of claims 1 to 2, 5 to 7, characterized in that: The rapid heating section is a double-layered "plant"-shaped structure formed by bending and overlapping the end section of the rapid heating tube.

9. The instant electric water heater according to claim 8, characterized in that: The rapid heating element is a U-shaped double-tube heating element.

10. The instantaneous electric water heater according to claim 1, characterized in that: The number of inner liner is at least one.

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