Hot water collecting structure and electric water heater

Abstract

The present invention provides a hot water collection structure and an electric water heater. The hot water collection structure includes a cylindrical body for covering the outside of an electric heating tube. The bottom of the cylindrical body is open to form a bottom opening. The upper end of the cylindrical body has a top opening. The water inlet end of the water outlet pipe is inserted into the cylindrical body through the bottom opening. The hot water collection structure of the present invention is installed outside the electric heating tube to prevent the hot water heated by the electric heating tube from flowing freely, thereby reducing the heat exchange between the hot water around the electric heating tube and the nearby cold water. As a result, the high-temperature hot water is gathered near the water inlet of the water outlet pipe, thereby improving the effective discharge of hot water from the electric heating tube and increasing the amount of hot water output.

Description

Technical Field

[0001] The present invention relates to the technical field of electric water heaters. Background Art

[0002] Currently, there are three heating methods for storage water heaters: submersible, top-layer, and half-tank. The submersible method places the heating tube at the bottom of the inner tank; the top-layer method places the heating tube at the top of the inner tank; and the half-tank method places the heating tube in the middle of the inner tank. The submersible heating method can only heat the water in the entire inner tank and cannot provide targeted heating. It takes a long time to heat and wastes a certain amount of energy. The only effective heating area in the top heating tube is the top heating wire area, and the top heating tube is in an open state in the inner tank. It only heats a small amount of water around the heating wire, and the heated water can flow and exchange freely in the inner tank, thereby reducing the effective utilization of the water heated by the top heating tube. In addition, due to power limitations, the top heating method cannot meet the user's bathing requirements when the inlet water temperature is low. Summary of the Invention

[0003] In order to solve the technical problem that the heated water in the top heating tube of the existing water storage type electric water heater is easily replaced by the surrounding cold water, resulting in a small amount of hot water output and a low hot water temperature, which cannot meet the bathing requirements of users, the present invention proposes an electric water heater that can solve the above problems.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A water collecting structure includes a cylindrical body for covering the outside of an electric heating pipe, the bottom of the cylindrical body is open to form a bottom opening, the upper end of the cylindrical body has a top opening, and the water inlet end of the water outlet pipe is inserted into the cylindrical body from the bottom opening.

[0006] Furthermore, a top cover is fixed to the upper end of the cylindrical body, and the top opening includes a first opening opened on the top cover.

[0007] Furthermore, the top cover is connected to the cylindrical body through an arc surface transition.

[0008] Furthermore, the top opening also includes a second opening opened on the cylindrical body.

[0009] Furthermore, the inner surface of the cylindrical body is formed with a first guide column extending obliquely upward from the second opening, the first guide column corresponds one-to-one with the second opening, the upper end face of the first guide column has a third opening, and a first guide channel is formed inside the first guide column to connect the third opening with the second opening.

[0010] Furthermore, the second opening is close to the upper end of the cylindrical body, and there are multiple second openings arranged along the circumferential direction of the cylindrical body.

[0011] Furthermore, several auxiliary water inlets are provided at the lower end of the cylindrical body, and a second guide column is formed on the outer surface of the cylindrical body, extending obliquely downward from the auxiliary water inlet. The lower end face of the second guide column has a fourth opening, and a second guide channel is formed inside the second guide column to connect the auxiliary water inlet with the fourth opening.

[0012] Furthermore, an annular groove with the notch facing outward is formed around the cylindrical body, and the second opening is opened on the upper side wall of the groove.

[0013] The present invention also proposes an electric water heater, including an inner tank, a water outlet pipe and a heating pipe, the heating pipe being fixed to the inner tank through a flange, and also including the hot water collection structure described in any one of claims 1-8, the heating pipe including at least a top heating pipe, the cylindrical body cover being arranged on the outside of the top heating pipe, and the water inlet end of the water outlet pipe being inserted into the cylindrical body from the bottom opening.

[0014] Furthermore, the water collecting structure is fixedly connected to the upper top wall of the inner tank.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are: the water-collecting structure of the present invention is sleeved on the outside of the electric heating pipe, so that the hot water heated by the electric heating pipe cannot flow freely, reducing the heat exchange between the hot water around the electric heating pipe and the nearby cold water, so that the high-temperature hot water is gathered near the water inlet of the outlet pipe, so as to improve the effective discharge of hot water from the electric heating pipe and increase the amount of hot water output.

[0016] Other features and advantages of the present invention will become more apparent after reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic structural diagram of an embodiment of the hot water accumulation structure proposed by the present invention;

[0019] Figure 2 This is a schematic diagram of a preferred structure of the water-collecting structure proposed by the present invention;

[0020] Figure 3 yes Figure 2 Schematic diagram of the bottom structure;

[0021] Figure 4 yes Figure 2 Schematic diagram of the positional relationship between the central hot water structure and the point heating pipes;

[0022] Figure 5 yes Figure 2 Schematic diagram of water circulation inside the Zhongju hot water structure;

[0023] Figure 6 This is another structural schematic diagram of the water-accumulating structure proposed by the present invention;

[0024] Figure 7 yes Figure 6 A magnified view of part A;

[0025] Figure 8 This is another structural schematic diagram of the water-accumulating structure proposed by the present invention;

[0026] Figure 9 yes Figure 8 A magnified view of part B;

[0027] Figure 10 This is a schematic structural diagram of the second embodiment of the water-accumulating structure proposed by the present invention;

[0028] Figure 11 yes Figure 10 A longitudinal cross-sectional view of an embodiment of the middle annular groove 24;

[0029] Figure 12 yes Figure 10 A longitudinal sectional view of another embodiment of the middle annular groove 24;

[0030] Figure 13 It is a structural schematic diagram of an embodiment of the electric water heater proposed by the present invention. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example 1

[0033] This embodiment proposes a water-collecting structure, such as Figures 1-4As shown, it includes a cylindrical body 11 for covering the outside of the electric heating tube, the bottom of the cylindrical body 11 is open to form a bottom opening 12, and the upper end of the cylindrical body 11 has a top opening 13. The bottom opening 12 is used to allow cold water located below the cylindrical body 11 to enter the cylindrical body 11 and be heated by the electric heating tube located in the cylindrical body 11. On the other hand, the water inlet end of the water outlet pipe can be inserted into the cylindrical body from the bottom opening. The cylindrical body 11 gathers the hot water heated by the electric heating tube and prevents it from flowing freely, reducing the heat exchange between the hot water around the electric heating tube and the nearby cold water, so that the high-temperature hot water gathers near the water inlet of the water outlet pipe, so as to improve the effective discharge of hot water from the electric heating tube and increase the amount of hot water output.

[0034] In order to meet different bathing needs, existing electric water heaters generally need to set up multiple heating tubes. According to different needs of users, the corresponding heating tube can be selected to work or multiple heating tubes can be selected to work in combination. Figure 1 As shown, the top heating tube 331 located on the top layer is closer to the water inlet of the water outlet pipe, providing instant hot water. However, the heating tube is open in the inner tank and only heats a small amount of water around the heating wire. The heated water can flow and exchange freely within the inner tank, thus reducing the effective utilization of the water heated by the top heating tube. This solution is particularly suitable for electric water heaters with top heating tubes. Given the above-mentioned characteristics of the top heater, the cylindrical body 11 in this solution is installed outside the top heating tube, which can cover the hot water heated by the top heating tube and prevent it from flowing freely.

[0035] In addition to the top heating tube 331 that can output hot water instantly, it generally also includes a bottom heating tube 332 arranged at the bottom of the inner tank. The bottom heating tube 332 can heat the water in the entire tank, and the heated hot water flows to the top of the inner tank. If only the bottom heating tube 332 is turned on at this time, the water temperature outside the cylindrical body 11 is higher than the water temperature inside, and the water inlet of the water outlet pipe is located inside the cylindrical body 11. Therefore, external hot water needs to enter the interior to provide hot water output for users. The top opening of the cylindrical body 11 serves to allow external hot water to enter the interior of the cylindrical body 11.

[0036] When the electric heating tube heats the water in the cylindrical body 11, since the specific gravity of hot water is smaller than that of cold water, the hot water will flow upwards. The cold water outside the cylindrical body 11 enters the cylindrical body 11 from the bottom opening 12 for replenishment. Since the water inlet of the outlet pipe is located in the cylindrical body 11, the best state is that all the hot water enters the outlet pipe. However, in actual use, it is inevitable that some hot water will rise. In order to prevent the rising hot water from flowing out from the top opening 13, as shown in FIG. Figure 2-Figure 4As shown, a top cover 14 is preferably fixed to the upper end of the cylindrical body 11, and the top opening 13 includes a first opening 131 opened on the top cover 14. When the whole tank is heated, hot water outside the cylindrical body 11 enters the inside of the cylindrical body 11 through the first opening 131. When the electric heating pipe inside the cylindrical body 11 is working, the hot water inside the cylindrical body 11 rises, as shown in FIG. Figure 5 As shown, when the hot water encounters the top cover 14, it is blocked and folded back by the top cover 14, thereby reducing the loss of hot water caused by the internal hot water flowing out through the first opening.

[0037] Preferably, the top cover 14 is connected to the cylindrical body 11 by a transition of the arc surface 15. The arc surface 15 can promote the formation of hot water inside the cylindrical body 11. Figure 4 The internal circulation shown is to increase the discharge of hot water from the outlet pipe without convection with the low-temperature water outside the water collecting ring, thereby causing heat loss.

[0038] In order to increase the amount and speed of external hot water entering the cylindrical body 11 when the whole tank is heated, in this embodiment, the top opening preferably also includes a second opening 132 opened on the cylindrical body 11, such as Figure 6 As shown, since the external hot water is located at the top of the inner tank, the second opening 132 is preferably located near the upper end of the cylindrical body 11, which is conducive to the hot water located around the cylindrical body 11 entering the interior thereof through the second opening 132, while the hot water located at the upper part of the cylindrical body 11 enters the interior thereof through the first opening 131. This solution increases the channel for the external hot water to enter the interior of the cylindrical body, which helps to increase the water intake amount and water intake speed of the external hot water entering the interior of the cylindrical body 11 when the entire tank is heated.

[0039] The bottom heating tube of the electric water heater is working when the whole tank is heated and the top heating tube is working when the water is heated instantly. Since the positions of the heating tubes corresponding to the two different heating methods are different, the flow directions of the hot water in the two heating methods are opposite. As mentioned above, the second opening 132 is provided to increase the flow of external hot water to the inside of the cylindrical body 11 when the whole tank is heated. However, when the top heating tube is heating instantly, the existence of the second opening 132 will accelerate the loss of hot water inside the cylindrical body 11. In order to prevent this from happening, Figure 6 、 Figure 7As shown, it is preferred that a first guide column 16 extending obliquely upward from the second opening 132 is formed on the inner surface of the cylindrical body 11. The number of the first guide columns 16 is consistent with the number of the second openings 132, and the first guide columns 16 correspond to the second openings 132 one by one. The upper end surface of the first guide column 16 has a third opening 161, and a first guide channel is formed inside the first guide column 16 for connecting the third opening 161 with the second opening 132. When the whole tank is heated, the hot water outside the cylindrical body 11 enters the second opening 132. Since the first guide column 16 is arranged to be inclined upward, the hot water entering the second opening 132 flows along the first guide channel in the first guide column 16, and then flows out through the third opening 161 located on the inner side of the cylindrical body 11. That is, the hot water located outside flows smoothly into the inside of the cylindrical body 11. When the top heating tube is heated immediately, the hot water inside the cylindrical body 11 flows upward, and the third opening 161 faces upward, so it is not easy for the hot water to enter the third opening 161 and be discharged to the outside of the cylindrical body 11. This solution solves the above two problems at the same time.

[0040] In order to facilitate production, the first guide column 16 is integrated with the cylindrical body. Preferably, the first guide column 16 is formed by punching inward from the outside of the cylindrical body 11 .

[0041] In order to smoothly guide the hot water inside the cylindrical body 11 to the top cover 14 and then block it back by the top cover 14 when the top heating tube is heating, the outer surface of the first guide column 16 is preferably a curved structure, which can reduce the resistance to the water flow, so that the hot water rises to the top cover 14 along the outer surface of the first guide column 16, and at the same time can reduce the disturbance caused to the water flow inside the cylindrical body 11, so that the blocked hot water converges to the water inlet of the outlet pipe and is output to the user.

[0042] The third opening 161 preferably intersects with the inner wall of the cylindrical body 11, and the inner wall of the cylindrical body 11 has a groove 162 connected to the third opening 161. When the hot water entering the first guide channel flows out from the third opening 161, the hot water can transition through the groove 162 and continue to rise close to the inner wall of the cylindrical body 11 until it rises to the top cover 14, and then is blocked by the top cover 14 and finally supplied to the user through the water inlet of the outlet pipe.

[0043] The shape of the second opening 132 can be circular or polygonal such as a triangle or a quadrilateral. In this embodiment, the second opening 132 is preferably elliptical, with its major axis arranged along the vertical direction. This solution is also based on the principle that hot water rises in the inner tank due to its low density. When the entire tank is heated, the contact area between the second opening 132 and the surrounding hot water is increased during the rising process of hot water, so that more hot water enters the interior of the cylindrical body through the second opening 132.

[0044] In order to allow the top hot water to enter the inside of the cylindrical body 11 from the outside, the second opening 132 is close to the upper end of the cylindrical body 11, and preferably there are multiple second openings, which are arranged along the circumferential direction of the cylindrical body, so that the hot water located around the outside of the cylindrical body 11 can enter the inside. Among them, the number and size of the second openings are not limited and can be set according to actual needs. Preferably, the second openings are evenly distributed along the circumferential direction of the cylindrical body 11.

[0045] The bottom opening 12 in this embodiment is used for the flow of cold water to replenish the cylindrical body 11 with cold water. When the user uses a large amount of water, in order to be able to replenish the cylindrical body 11 with water in time, it is preferably provided with a plurality of auxiliary water inlets (not shown in the figure due to angle reasons), and in order to reduce the disturbance of the internal hot water caused by the cold water entering from the outside, the auxiliary water inlets are opened at the lower end of the cylindrical body 11.

[0046] There can be multiple auxiliary water inlets, and they are preferably evenly distributed along the circumference of the cylindrical body so that the cold water entering from all directions is balanced, further reducing the disturbance to the hot water inside the cylindrical body 11.

[0047] In order to reduce the loss of hot water inside the cylindrical body 11 through the auxiliary water inlet, Figure 8 、 Figure 9 As shown, the outer surface of the cylindrical body 11 is preferably formed with a second guide column 18 extending obliquely downward from the auxiliary water inlet. The number of second guide columns 18 is the same as the number of auxiliary water inlets, and the second guide columns 18 correspond to the auxiliary water inlets one by one. The lower end surface of the second guide column 18 has a fourth opening 181, and a second guide channel is formed inside the second guide column 18, connecting the auxiliary water inlet and the fourth opening 181. When a large amount of water is needed, cold water from the outside can enter the cylindrical body 11 through the fourth opening 181, while hot water inside the cylindrical body 11 is unlikely to escape from the fourth opening 181, thereby reducing heat loss.

[0048] The cylindrical body 11 has a second groove 182 below the fourth opening 181 , which is connected to the fourth opening 181 . Water around the cylindrical body 11 can flow into the fourth opening 181 along the second groove 182 and then smoothly enter the interior of the cylindrical body 11 for heating.

[0049] In order to facilitate production, the second guide column 18 is preferably integrated with the cylindrical body and is formed by stamping outward from the inner surface of the cylindrical body 18 .

[0050] Example 2

[0051] This embodiment proposes another type of hot water storage structure, such as Figure 10As shown, it includes a cylindrical body 21 for covering the outside of the electric heating tube, the bottom of the cylindrical body 21 is open to form a bottom opening 22, and the upper end of the cylindrical body 21 has a top opening, which is used to allow cold water located below the cylindrical body 21 to enter the sub-cylindrical body 21 and be heated by the electric heating tube located in the cylindrical body 21. On the other hand, the water inlet end of the water outlet pipe can be inserted into the cylindrical body from the bottom opening. The cylindrical body 21 prevents the hot water heated by the electric heating tube from flowing freely, reducing the heat exchange between the hot water around the electric heating tube and the nearby cold water, so that the high-temperature hot water gathers near the water inlet of the water outlet pipe, so as to improve the effective discharge of hot water from the electric heating tube and increase the amount of hot water output. In order to increase the amount and speed of external hot water entering the cylindrical body 21 when the whole tank is heated, the top opening in this embodiment preferably also includes a second opening 232 opened on the cylindrical body 21. The difference from Example 1 is that in this embodiment, an annular groove 24 with a notch facing the outside of the annular cylindrical body is formed around the annular cylindrical body 21, and the second opening 232 is opened on the upper side wall of the groove 24.

[0052] Since the notch of the annular groove 24 faces outward and the second opening 232 is provided on the upper side wall of the groove 24, the plane where the second opening 232 is located is inclined upward from the bottom of the annular groove. When the entire tank is heated, external hot water first enters the annular groove 24 and then enters the cylindrical body 21 through the inclined second opening 232. When the top heating tube is heated immediately, the hot water inside the cylindrical body 21 flows upward, and the second opening 232 faces upward, so it is not easy for hot water to enter the second opening 232 and be discharged to the outside of the cylindrical body 21. This solution can also solve the above two problems.

[0053] like Figure 11 、 Figure 12 As shown, the longitudinal section of the annular groove 24 is preferably curved or trapezoidal.

[0054] Example 3

[0055] The present invention provides an electric water heater, such as Figure 13 As shown, it includes an inner tank 31, a water outlet pipe 32 and a heating pipe 33. The heating pipe 33 is fixed to the inner tank through a flange 34. It also includes the hot water collecting structure described in Example 1. For details, see Figures 1-9As shown, the heating pipe 33 includes at least a top heating pipe 331. The cylindrical body 11 is covered on the outside of the top heating pipe 331, and the water inlet end of the water outlet pipe 32 is inserted into the cylindrical body 11 from the bottom opening of the cylindrical body 11. In order to meet different bathing needs, existing electric water heaters need to be equipped with multiple heating pipes. According to different needs of users, corresponding heating pipes can be selected for operation or multiple heating pipes can be selected for operation in combination. Among them, the top heating pipe located on the top layer is closer to the water inlet of the water outlet pipe and has the characteristic of instant hot water output. However, the existing top heating pipe is in an open state in the inner tank, and it only heats a small amount of water around the heating wire. The heated water can flow and exchange freely in the inner tank, thereby reducing the effective utilization of the water heated by the top heating pipe. This solution is particularly suitable for electric water heaters with a top heating tube. In view of the above-mentioned characteristics of the top heating tube, this solution provides a water-collecting structure on the outside of the top heating tube 331 to cover the hot water heated by the top heating tube 331, so that the water in the top heating tube cannot flow freely, reducing the heat exchange between the hot water around the top heating tube and the nearby cold water, so that the high-temperature hot water gathers near the water inlet of the outlet pipe, so as to improve the effective discharge of the hot water in the top heating tube through the outlet pipe, thereby increasing the amount of hot water output and the outlet water temperature.

[0056] Because hot water has a lower specific gravity than cold water, hot water flows upward while cold water flows downward. To maximize the amount of hot water collected by the hot water collecting structure, it should be positioned above the inner pot. In this embodiment, the hot water collecting structure is fixedly connected to the upper wall of the inner pot 31. Because the upper wall of the inner pot 31 is a curved structure, while the top of the hot water collecting structure is a flat surface, a gap exists between the hot water collecting structure and the top wall of the inner pot 31. To facilitate heating of the entire pot, hot water at the top of the inner pot enters the tubular body 11 through the top opening.

[0057] The electric water heater in this embodiment, such as Figure 13 As shown, the top heating tube 331 is preferably a top heating tube whose heating portion extends to the upper part of the inner tank. Since the specific gravity of hot water is smaller than that of cold water, hot water will flow upward and cold water will flow downward, generating convection. Therefore, the top heating tube 331 will only heat the water located in this layer and above.

[0058] As a preferred embodiment, the heating tube in the electric water heater also includes a bottom heating tube 332, which is located at the bottom of the inner tank and is used to heat the water in the inner tank 31. When the electric water heater is working, the bottom heating tube 332 can be used alone, and the convection of hot water and cold water is carried out in the entire tank, thereby heating the water in the entire tank; the top heating tube 331 can also be used alone to heat only the water located in the current layer and above. The convection of hot water and cold water is only carried out in the top layer area of the inner tank, the water temperature rises quickly, and hot water can be produced quickly.

[0059] The water inlet end of the water outlet pipe 32 is inserted into the cylindrical body 11. When the top heating pipe 331 is working, the hot water accumulated in the cylindrical body 11 can directly enter the water outlet pipe through the water inlet end of the water outlet pipe 32, reducing the heat loss of the hot water and improving the hot water output and hot water temperature.

[0060] When the top heating tube 331 is working, it heats the water inside the cylindrical body 11. When the hot water valve is opened, hot water flows out through the outlet pipe, and part of the hot water flows upward and flows out through the top opening of the cylindrical body 11 to the outside of the cylindrical body 11. The water in the inner tank enters the cylindrical body 11 from the bottom opening of the cylindrical body 11 to replenish it with cold water. When the bottom heating tube 332 is working, the entire tank is heated. The hot water heated by the bottom heating tube 332 flows toward the top layer of the inner tank 31, enters the cylindrical body 11 through the top opening of the cylindrical body 11, and then enters the outlet pipe through the water inlet end of the outlet pipe 32. At this time, under the action of water pressure, the cold water in the cylindrical body 11 is discharged to the outside of the cylindrical body 11 through its bottom opening.

[0061] In this embodiment, the upper end of the cylindrical body 11 is fixed to the inner container 31 or the top cover 14 is fixed to the inner container 31. Figure 13 As shown, it can be fixedly connected to the top wall of the inner container 31 through a fixing rod. The fixing method can be welding, or the upper end of the cylindrical body 11 and the top cover 14 can be directly fixed to the inner container 31.

[0062] The bottom opening of the cylindrical body 11 is completely open, and the top heating pipe 331 and the water outlet pipe are respectively inserted into the cylindrical body 11 from the bottom opening.

[0063] like Figure 13 As shown, in this embodiment, the top heating tube 331 and the bottom heating tube 332 are both fixed on the flange 34, and the top heating tube 331 and the bottom heating tube 332 extend into the inner tank from the side of the inner tank. Of course, the top heating tube 331 and the bottom heating tube 332 can also be fixed by a flange respectively, and the insertion direction can be vertically inserted upward from the bottom of the inner tank, or vertically inserted downward from the top of the inner tank. The above schemes all fall within the scope of protection of this patent.

[0064] like Figure 13 As shown, preferably in this embodiment, the top heating tube 331 includes a top bending portion 331a disposed on the top layer of the inner tank and a bottom bending portion 331b disposed on the bottom layer of the inner tank. The top bending portion 331a is spiral, which can extend the length of the top bending portion 331a and increase the amount of resistance wire laid, thereby improving the hot water making capacity. The resistance wire of the top heating tube is distributed in the top bending portion 331a, and the cylindrical body 11 is covered on the outside of the top bending portion 331a.

[0065] The long axis direction of the spiral structure of the top bending portion 331a is arranged vertically, and the cylindrical body 11 is covered outside the spiral structure. Therefore, the long axis direction of the cylindrical body 11 is also arranged vertically.

[0066] Both ends of the top heating tube 331 are fixed to the flange 34 to form a closed structure, and the top bent portion 331a is inserted into the cylindrical body 11 from the bottom opening.

[0067] In order to further buffer the rising hot water in the cylindrical body 11, prevent the cold water added into the cylindrical body 11 from disturbing the stratification and reduce the loss of hot water through the top opening, the inner diameter of the upper end of the cylindrical body 11 is preferably smaller than the inner diameter of the lower end.

[0068] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A water collecting structure, characterized in that: It includes a cylindrical body for covering the outside of the electric heating tube, the bottom of the cylindrical body is open to form a bottom opening, the upper end of the cylindrical body has a top opening, and the water inlet end of the water outlet pipe is inserted into the cylindrical body from the bottom opening; the top opening also includes a second opening opened on the cylindrical body, and the inner surface of the cylindrical body is formed with a first guide column extending obliquely upward from the second opening, the first guide column and the second opening correspond one-to-one, the upper end face of the first guide column has a third opening, and a first guide channel is formed inside the first guide column to connect the third opening with the second opening.

2. The hot water accumulation structure according to claim 1, characterized in that: A top cover is fixed to the upper end of the cylindrical body, and the top opening includes a first opening opened on the top cover.

3. The hot water collection structure according to claim 2, characterized in that: The top cover is connected to the cylindrical body through an arc surface transition.

4. The hot water collection structure according to claim 1, characterized in that: The second opening is close to the upper end of the cylindrical body, and there are a plurality of second openings arranged along the circumferential direction of the cylindrical body.

5. The hot water accumulation structure according to any one of claims 1 to 4, characterized in that: Several auxiliary water inlets are also provided at the lower end of the cylindrical body. A second guide column is formed on the outer surface of the cylindrical body, extending obliquely downward from the auxiliary water inlet. The lower end face of the second guide column has a fourth opening, and a second guide channel is formed inside the second guide column to connect the auxiliary water inlet with the fourth opening.

6. The hot water accumulation structure according to any one of claims 1 to 4, characterized in that: An annular groove with an outward-facing notch is formed around the cylindrical body, and the second opening is opened on the upper side wall of the groove.

7. An electric water heater comprising an inner tank, a water outlet pipe, and a heating pipe, wherein the heating pipe is fixed to the inner tank via a flange, and characterized in that: It also includes the hot water collection structure according to any one of claims 1 to 6, wherein the heating pipe includes at least a top heating pipe, the cylindrical body cover is arranged on the outside of the top heating pipe, and the water inlet end of the water outlet pipe is inserted into the cylindrical body from the bottom opening.

8. The electric water heater according to claim 7, characterized in that: The water collecting structure is fixedly connected to the upper top wall of the inner container.

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