Water inlet structure for water heater and water heater

Abstract

The utility model relates to the technical field of household appliances, and discloses a water inlet structure for a water heater and the water heater. The water inlet structure for the water heater comprises a water inlet inner pipe and a flow guiding device, one end of the water inlet inner pipe is open, the other end of the water inlet inner pipe is closed, and an inner water outlet hole set is formed in the side wall of a water outlet section of the water inlet inner pipe; the flow guide device is arranged in the water inlet inner pipe, a water inlet channel and a flow guide channel communicated with the water inlet channel are arranged on the flow guide device, the water inlet channel extends in the length direction of the water outlet section, and the flow guide channel directly faces and is communicated with the inner water outlet hole group; water flowing through the water inlet channel can flow out of the inner water outlet hole set in the radial direction of the water inlet inner pipe under the flow guide effect of the flow guide channel. The water inlet structure for the water heater can guide the water outlet direction of water flow, so that cold and hot water layering is prevented from being damaged, cold and hot water turbulent flow is reduced, and the hot water output rate of the electric water heater is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a water inlet structure for a water heater and a water heater. Background Art

[0002] The water storage electric water heater stores hot water in the inner tank of the water heater in advance. When the user needs to use it, the hot water is taken out from the inner tank of the water heater through the water inlet and outlet pipes of the electric water heater. Since the cold water passing through the water inlet pipe is under pressure and flows into the inner tank in a jet-like shape, the water flow will disturb the hot water inside the inner tank. The mixing of cold water and hot water in the inner tank will destroy the stratification of cold and hot water, thereby affecting the hot water output rate of the electric water heater. The hot water output rate is an important indicator for testing the performance of electric water heaters. The more hot water output per unit capacity of the electric water heater, the higher the hot water output rate.

[0003] In the prior art, in order to slow down the turbulence of cold and hot water to increase the hot water output rate, a water retaining fin is usually arranged in the water inlet pipe of the water heater, and a slow flow hole is arranged on the water retaining fin. When the water in the water inlet pipe flows through the water retaining fin, the water retaining fin blocks the water, but cannot completely block it, so that the water can flow into the inner tank from the slow flow hole to slow down the flow rate of the water. However, although this arrangement can slow down the flow rate of water to a certain extent, it cannot control the direction of the water flowing out of the water outlet of the water inlet pipe, causing part of the water to flow above the cold and hot water layers, causing turbulence of cold and hot water, and affecting the hot water output rate of the electric water heater.

[0004] Therefore, it is urgent to propose a water inlet structure for a water heater to solve the above problems. Utility Model Content

[0005] Based on the above, the purpose of the utility model is to provide a water inlet structure and a water heater for a water heater, which can guide the outflow direction of cold water in the water inlet pipe, thereby avoiding the destruction of the stratification of cold and hot water, reducing the turbulence of cold and hot water, and improving the hot water output rate of the electric water heater.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A water inlet structure for a water heater, comprising:

[0008] An inner water inlet pipe, one end of which is open and the other end is closed, and an inner water outlet hole group is provided on the side wall of the water outlet section of the inner water inlet pipe;

[0009] A flow guide device is arranged in the water inlet inner tube, and is provided with a water inlet channel and a flow guide channel connected to the water inlet channel. The water inlet channel extends along the length direction of the water outlet section, and the flow guide channel is directly opposite to and connected to the inner water outlet hole group. Water flowing through the water inlet channel can flow out from the inner water outlet hole group along the radial direction of the water inlet inner tube under the guiding effect of the flow guide channel.

[0010] As a preferred solution of the water inlet structure for the water heater provided by the utility model, there are multiple inner water outlet hole groups, and the multiple inner water outlet hole groups are arranged at intervals along the length direction of the water outlet section; there are multiple guide channels, and they are connected to the inner water outlet hole groups one by one.

[0011] As a preferred solution of the water inlet structure for the water heater provided by the utility model, the flow guide device includes at least one flow guide structure. When the number of the flow guide structures is at least two, at least two of the flow guide structures are arranged at intervals along the extension direction of the water inlet channel.

[0012] Each of the guide structures comprises two guide members respectively located on both sides of the corresponding inner water outlet hole group in the extending direction of the water inlet channel, and the interval between the two guide members forms the guide channel.

[0013] As a preferred solution of the water inlet structure for the water heater provided by the utility model, the flow guide device also includes a connecting piece, and the connecting piece is used to connect all the flow guide pieces, and the flow guide device is connected to the water inlet inner pipe through the connecting piece.

[0014] As a preferred solution of the water inlet structure for the water heater provided by the utility model, the number of the connecting members is at least two, and at least two of the connecting members are arranged at intervals along the circumference of the guide member.

[0015] As a preferred solution of the water inlet structure for the water heater provided by the utility model, each group of the inner water outlet holes includes a plurality of inner water outlet holes arranged at intervals along the circumference of the water inlet inner tube, and the angle θ between the inner water outlet holes located at both ends of the plurality of inner water outlet holes in each group of the inner water outlet holes is less than 180°.

[0016] As a preferred solution of the water inlet structure for the water heater provided by the utility model, the number of the connecting parts is one, the connecting part is an arc-shaped plate, and the extension direction of the axis of the connecting part is the same as the extension direction of the water inlet channel, the cross-sectional shape of the guide part is fan-shaped, and the two ends of the guide part are respectively connected to the two sides of the opening of the arc-shaped plate, and the central angle of the fan-shaped cross-section of the guide part is greater than θ.

[0017] As a preferred solution of the water inlet structure for the water heater provided by the utility model, the cross-sectional shape of the guide member is a circular ring, the axial direction of the guide member is the same as the extension direction of the water inlet channel, and the outer peripheral wall of the guide member abuts against the inner wall of the water inlet inner tube.

[0018] As a preferred solution of the water inlet structure for the water heater provided by the utility model, the two opposite sides of the guide members of each guide structure gradually approach each other along the direction from the center of the water inlet inner tube to the tube wall of the water inlet inner tube.

[0019] As a preferred solution of the water inlet structure for the water heater provided by the utility model, the water inlet structure for the water heater also includes an outer water inlet pipe, which is sleeved outside the inner water inlet pipe, and the side wall of the outer water inlet pipe is provided with outgoing water holes, and the outgoing water holes are staggered with the inner water outlet hole group.

[0020] The utility model also provides a water heater, comprising an inner tank and the water inlet structure for the water heater as described above, wherein the closed end of the water inlet inner tube of the water inlet structure for the water heater is arranged in the inner tank, and the open end of the water inlet inner tube extends out of the inner tank and can be connected to an external water source.

[0021] The beneficial effects of the utility model are:

[0022] The utility model provides a water inlet structure for a water heater, comprising an inner water inlet tube and a flow guide device, wherein one end of the inner water inlet tube is open and the other end is closed, and an inner water outlet hole group is arranged on the side wall of the water outlet section of the inner water inlet tube; the flow guide device is arranged in the inner water inlet tube, and the flow guide device is provided with a water inlet channel and a flow guide channel connected with the water inlet channel, the water inlet channel extends along the length direction of the water outlet section, the flow guide channel is directly opposite to and connected with the inner water outlet hole group, and the water flowing through the water inlet channel can flow out from the inner water outlet hole group along the radial direction of the inner water inlet tube under the flow guide effect of the flow guide channel. Through the arrangement of the flow guide device, the cold water in the inner water inlet tube can be guided to control the water outlet direction so that it flows to the bottom of the cold and hot water stratification; on the other hand, due to the arrangement of the flow guide channel, the flow path of the cold water in the inner water inlet tube can also be increased, thereby reducing the flow rate of the cold water, thereby avoiding the phenomenon of cold and hot water turbulence during water inlet, thereby ensuring the hot water output rate of the water heater.

[0023] The water heater provided by the utility model can guide the outlet direction of the cold water in the water inlet structure by applying the above-mentioned water heater water inlet structure, thereby avoiding the destruction of the stratification of cold and hot water, reducing the turbulence of cold and hot water, improving the hot water output rate of the electric water heater, reducing resource waste, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. 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 the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0025] Figure 1 It is a structural schematic diagram of a water heater provided by an embodiment of the utility model;

[0026] Figure 2 It is a structural schematic diagram of a water inlet structure for a water heater provided by an embodiment of the utility model at a viewing angle;

[0027] Figure 3 It is a structural schematic diagram of the flow guide device provided in the first embodiment of the utility model;

[0028] Figure 4 yes Figure 3 Schematic diagram of the local structure;

[0029] Figure 5 It is a structural schematic diagram of the flow guide device provided in the second embodiment of the utility model;

[0030] Figure 6 yes Figure 5 Schematic diagram of the local structure;

[0031] Figure 7 It is a structural schematic diagram of a water inlet structure for a water heater provided in Embodiment 3 of the present utility model;

[0032] Figure 8 It is a structural schematic diagram of the flow guide device provided in the fourth embodiment of the utility model;

[0033] Fig. 9 It is a structural schematic diagram of a water heater with a hidden inner tank provided in Embodiment 5 of the present utility model.

[0034] In the figure:

[0035] 1000, liner;

[0036] 100, water inlet inner pipe; 101, connecting section; 102, inclined section; 103, water outlet section; 1031, inner water outlet hole;

[0037] 200, flow guide device; 210, flow guide structure; 2101, water inlet channel; 2102, flow guide channel; 220, connecting piece;

[0038] 300, water inlet outer pipe; 301, water outlet hole. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] Embodiment 1

[0044] Figure 1The schematic diagram of the structure of the water heater provided in this embodiment is shown. The water heater includes an inner tank 1000 and a water inlet structure for the water heater, the water inlet structure for the water heater includes an inner water inlet tube 100, one end of the inner water inlet tube 100 is open and the other end is closed, the closed end of the inner water inlet tube 100 is arranged in the inner tank 1000, the open end of the inner water inlet tube 100 extends out of the inner tank 1000 and can be connected to an external water source, and an inner water outlet hole group is arranged on the side wall of the part of the inner water inlet tube 100 located in the inner tank 1000. Water from the external water source can enter from the open end of the inner water inlet tube 100, and flow into the inner tank 1000 from the inner water outlet hole group to supply cold water to the inner tank 1000.

[0045] In this embodiment, the water inlet inner tube 100 includes a connecting section 101, an inclined section 102 and a water outlet section 103 connected in sequence, the inclined section 102 and the water outlet section 103 are both located inside the inner tank 1000, one end of the connecting section 101 away from the inclined section 102 passes through the inner tank 1000 and is connected to an external water source, the connecting section 101 and the water outlet section 103 are both arranged parallel to the bottom wall of the inner tank 1000, and the water outlet section 103 is arranged close to the inner bottom wall of the inner tank 1000, and the inner water outlet hole group is located on the water outlet section 103. Optionally, in this embodiment, the number of the inner water outlet hole groups is multiple groups, and the multiple groups of inner water outlet hole groups are arranged along the extension direction of the water outlet section 103 to improve the water inlet efficiency.

[0046] In order to ensure the hot water output rate of the water heater, the cold water flowing into the inner tank 1000 from the water inlet structure of the water heater should be placed below the cold and hot water layers as much as possible, thereby reducing the cold and hot water disturbance phenomenon. However, the water inlet structure of the water heater in the prior art cannot control the water outlet direction of the cold water flowing into the inner tank 1000, causing part of the cold water to flow above the cold and hot water layers, causing cold and hot water disturbance, and affecting the hot water output rate of the water heater.

[0047] To solve the above problems, this embodiment also provides a water inlet structure for a water heater, which can control the water outlet direction of cold water flowing into the inner tank 1000 to prevent cold water from flowing above the cold and hot water stratification, thereby reducing the turbulence of cold and hot water and ensuring the hot water output rate of the water heater.

[0048] Figure 2 The schematic diagram of the structure of the water inlet structure for the water heater provided in this embodiment is shown at one viewing angle. Figure 3 FIG. 2 shows a schematic diagram of the structure of the flow guiding device 200 provided in this embodiment. Figure 2-Figure 3 Combined with Figure 1As shown, the water inlet structure for the water heater provided in this embodiment also includes a guide device 200, which is arranged in the water inlet inner tube 100. The guide device 200 is provided with a water inlet channel 2101 and a plurality of guide channels 2102 which are connected to the water inlet channel 2101. The water inlet channel 2101 extends along the arrangement direction of the plurality of inner water outlet hole groups, and the guide channels 2102 are connected to the inner water outlet hole groups in a one-to-one correspondence. Water flowing through the water inlet channel 2101 can flow out from the corresponding inner water outlet hole group along the radial direction of the water inlet inner tube 100 under the guide effect of the guide channel 2102. By setting the guide device 200, the cold water in the water inlet inner tube 100 can be guided to control the water outlet direction so that it flows to the bottom of the cold and hot water layers; on the other hand, due to the setting of multiple guide channels 2102, the flow path of the cold water in the water inlet inner tube 100 can also be increased, thereby reducing the cold water flow rate, thereby avoiding the turbulence of cold and hot water during water inlet, thereby ensuring the hot water output rate of the water heater.

[0049] Figure 4 Shows Figure 3 Schematic diagram of the local structure. Figure 4 Combined with Figure 1-Figure 3 As shown, the flow guiding device 200 includes a plurality of flow guiding structures 210 arranged at intervals along the extension direction of the water inlet channel 2101, and each flow guiding structure 210 includes two flow guiding members respectively located on both sides of the corresponding inner water outlet hole group in the extension direction of the water inlet channel 2101, and the interval between the two flow guiding members forms a flow guiding channel 2102. After the cold water in the external water source enters the water inlet channel 2101, it passes through each flow guiding structure 210 in sequence, and then flows out from the corresponding inner water outlet hole group after passing through the interval between the two flow guiding members of each flow guiding structure 210.

[0050] In the present embodiment, each inner water outlet hole group includes a plurality of inner water outlet holes 1031 arranged at intervals along the circumference of the water inlet inner tube 100. In order to prevent the cold water flowing out of the inner water outlet holes 1031 from flowing to the top of the cold and hot water layers under the action of the water inlet pressure, each inner water outlet hole group includes a plurality of inner water outlet holes 1031 arranged at intervals along the circumference of the water inlet inner tube 100, and the angle θ between the inner water outlet holes 1031 located at both ends of the plurality of inner water outlet holes 1031 of each inner water outlet hole group is less than 180°. During installation, it should be ensured as much as possible that all the inner water outlet holes 1031 are located below the radial section of the water inlet inner tube 100 parallel to the horizontal plane, so as to make the cold water flowing out of all the inner water outlet holes 1031 spray toward the bottom of the cold and hot water layers. Of course, in other embodiments, each inner water outlet hole group may also include only one inner water outlet hole 1031, which can also achieve the above effect. In this example, when the water inlet inner tube 100 is installed, the inner water outlet hole 1031 can be located at the lowest part of the water inlet inner tube 100 .

[0051] Continue as Figure 3-Figure 4As shown, the cross-sectional shape of the guide member is annular, the axial direction of the guide member is the same as the extension direction of the water inlet channel 2101, and the outer peripheral wall of the guide member abuts against the inner wall of the water inlet inner tube 100. This design is simple in structure and convenient for processing.

[0052] Optionally, the opposite sides of the two guide members of each guide structure 210 gradually approach each other in the direction from the center of the water inlet inner tube 100 to the tube wall of the water inlet inner tube 100 to further improve the guide effect.

[0053] In order to facilitate the assembly between the flow guide device 200 and the water inlet inner tube 100, the flow guide device 200 also includes a connector 220, which is used to connect all the flow guide members, and the flow guide device 200 is connected to the water inlet inner tube 100 through the connector 220. By providing the connector 220, all the flow guide members can be connected into an integral structure to facilitate the assembly between the flow guide device 200 and the water inlet inner tube 100, thereby improving the assembly efficiency. In this embodiment, the end of the water inlet inner tube 100 located in the middle of the inner liner 1000 is sealed by a sealing plug, and the flow guide device 200 is fixed on the sealing plug.

[0054] In this embodiment, there are at least two connecting members 220, and at least two connecting members 220 are arranged at intervals along the circumference of the flow guide member. Optionally, the connecting member 220 is rod-shaped.

[0055] It should be noted that, in the present embodiment, the rod-shaped connecting member 220 can separate the intervals between the two guide members in each group of guide structures 210 to form a plurality of branch channels. To ensure smooth water flow from the inner water outlet 1031, during installation, the inner water outlet 1031 should be arranged opposite to one or several of the branch channels, and not opposite to the connecting member 220.

[0056] Of course, in other embodiments, the connecting piece 220 may not be provided, and the annular guide piece may be directly installed in the water inlet inner tube 100 . The guide piece may be adhered to the inner wall of the water inlet inner tube 100 , and the above-mentioned effect can also be achieved.

[0057] Embodiment 2

[0058] This embodiment provides a water inlet structure for a water heater. The specific structure of the water inlet structure for a water heater is substantially the same as that of the water inlet structure for a water heater provided in the first embodiment, and the main difference lies in the structure of the guide device 200.

[0059] Figure 5 A schematic structural diagram of the flow guiding device 200 provided in this embodiment is shown. Figure 6 Shows Figure 5 Schematic diagram of the local structure. Figure 5-Figure 6As shown, the number of the connecting member 220 is one, the connecting member 220 is an arc-shaped plate, and the extension direction of the axis of the connecting member 220 is the same as the extension direction of the water inlet channel 2101, the cross-sectional shape of the guide member is fan-shaped, and the two ends of the guide member are respectively connected to the two sides of the opening of the arc-shaped plate, and the central angle of the fan-shaped cross-section of the guide member is greater than θ. This design can ensure that all the inner water outlet holes 1031 can correspond to the guide channel 2102 to ensure the guide effect; and this design can also reduce the material used for the guide member, reduce the processing cost, and at the same time can reduce the number of connecting members 220, and facilitate the assembly of the connecting member 220 and the guide member. In this embodiment, the inner side of the arc-shaped plate and the side of the guide member facing the connecting member 220 are surrounded to form the water inlet channel 2101.

[0060] Embodiment 3

[0061] This embodiment provides a water inlet structure for a water heater, and the specific structure of the water inlet structure for a water heater is substantially the same as that of the water inlet structure for a water heater provided in the first embodiment, with the main difference being that an outer water inlet tube 300 is disposed outside the inner water inlet tube 100 .

[0062] Specifically, Figure 7 FIG. 2 shows a schematic diagram of the water inlet structure for a water heater provided in this embodiment. Figure 7 As shown, the water inlet structure for the water heater also includes an outer water inlet tube 300, which is sleeved outside the inner water inlet tube 100, and an outflow hole 301 is arranged on the side wall of the outer water inlet tube 300, and the outflow hole 301 is arranged alternately with the inner water outlet hole 1031. With this arrangement, when the cold water flows out from the inner water outlet hole 1031 of the inner water inlet tube 100, it will collide with the tube wall of the outer water inlet tube 300, and then flow out from the outflow hole 301 along the tube wall of the outer water inlet tube 300 into the inner tank 1000. In this process, the flow rate of the cold water will be greatly reduced, thereby greatly reducing the impact force of the cold water flowing into the inner tank 1000, thereby reducing the turbulence phenomenon of cold and hot water, and ensuring the hot water output rate of the water heater.

[0063] Optionally, there are multiple outgoing water holes 301, and the multiple outgoing water holes 301 are spaced apart along the length direction and / or circumferential direction of the water inlet outer tube 300 to improve the water inlet efficiency of cold water. It should be noted that in this example, the distribution range of the inner water outlet holes 1031 on the water inlet inner tube 100 is not limited, and the inner water outlet holes 1031 can cover the entire water inlet inner tube 100; and the multiple outgoing water holes 301 are all distributed below the radial section of the water inlet outer tube 300 parallel to the horizontal plane to prevent the cold water entering the inner tank 1000 from the water inlet structure of the water heater from flowing above the cold and hot water stratification.

[0064] In this embodiment, the water inlet outer pipe 300 is sleeved outside the water outlet section 103. This design can reduce the material used for the water inlet outer pipe 300 and reduce material costs.

[0065] It should be particularly noted that, in this embodiment, the guide device 200 can adopt either the guide device 200 in Embodiment 1 or the guide device 200 in Embodiment 2. Those skilled in the art can select the guide device according to the distribution of the inner water outlet holes 1031 on the water inlet inner tube 100, and this embodiment does not limit this.

[0066] Embodiment 4

[0067] This embodiment provides a water inlet structure for a water heater, and the specific structure of the water inlet structure for a water heater is substantially the same as that provided in the first embodiment, with the main difference being that the number of the inner water outlet hole groups arranged on the water inlet inner tube 100 is one.

[0068] Figure 8 FIG. 2 shows a schematic diagram of the structure of the flow guiding device 200 provided in this embodiment. Figure 8 As shown, in this embodiment, the flow guide device 200 includes a flow guide structure 210, the number of the inner water outlet hole group set on the water inlet inner tube 100 is one, and the flow guide structure 210 includes two flow guide members respectively located on both sides of the inner water outlet hole group in the extension direction of the water inlet channel 2101, and the interval between the two flow guide members forms the above-mentioned flow guide channel 2102. The water heater water inlet structure in this embodiment is suitable for water heaters with an inner tank 1000 of a smaller inner diameter, and only one group of inner water outlet hole groups is needed to meet its water outlet demand.

[0069] Embodiment 5

[0070] Fig. 9 FIG. 1 shows a schematic diagram of the structure of the hidden inner tank 1000 of the water heater provided in this embodiment. Fig. 9 As shown, this embodiment provides a water heater, which includes a water inlet structure for the water heater and two inner tanks 1000 arranged at intervals in the vertical direction. The water inlet structure for the water heater includes an inner water inlet tube 100, one end of the inner water inlet tube 100 is open and the other end is closed, the closed end of the inner water inlet tube 100 is arranged in the inner tank 1000, the open end of the inner water inlet tube 100 extends out of the inner tank 1000 and can be connected to an external water source, and an inner water outlet hole group is arranged on the side wall of the part of the inner water inlet tube 100 located in the inner tank 1000. In this embodiment, the inner water inlet tube 100 extends in the vertical direction and extends from the bottom of the inner tank 1000 located below.

[0071] To ensure the hot water output rate of the water heater, the height of the inner water outlet group on the water inlet inner tube 100 should be as low as possible below the cold and hot water layers. At this time, the length of the water inlet inner tube 100 can be set to 1 / 3 to 1 / 2 of the inner diameter of the inner tank 1000 to save materials and reduce manufacturing costs.

[0072] Optionally, the water inlet structure for the water heater further includes a flow guide device 300, and the flow guide device 300 can adopt any one of the ones provided in the first embodiment, the second embodiment, the third embodiment or the fourth embodiment, which will not be described in detail in this embodiment.

[0073] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A water inlet structure for a water heater, characterized in that: include: An inner water inlet tube (100), one end of the inner water inlet tube (100) being open and the other end being closed, and an inner water outlet hole group being arranged on the side wall of a water outlet section (103) of the inner water inlet tube (100); A flow guide device (200) is arranged in the water inlet inner tube (100), and is provided with a water inlet channel (2101) and a flow guide channel (2102) connected to the water inlet channel (2101). The water inlet channel (2101) extends along the length direction of the water outlet section (103), and the flow guide channel (2102) is directly opposite to and connected to the inner water outlet hole group. Water flowing through the water inlet channel (2101) can flow out from the inner water outlet hole group along the radial direction of the water inlet inner tube (100) under the flow guide effect of the flow guide channel (2102).

2. The water inlet structure for a water heater according to claim 1, characterized in that: There are multiple inner water outlet hole groups, and the multiple inner water outlet hole groups are arranged at intervals along the length direction of the water outlet section (103); there are multiple diversion channels (2102), and they are connected to the inner water outlet hole groups in a one-to-one correspondence.

3. The water inlet structure for a water heater according to claim 1 or 2, characterized in that: The flow guiding device (200) comprises at least one flow guiding structure (210); when the number of the flow guiding structures (210) is at least two, at least two of the flow guiding structures (210) are arranged at intervals along the extension direction of the water inlet channel (2101); Each of the flow-guiding structures (210) comprises two flow-guiding members respectively located on both sides of the corresponding inner water outlet hole group in the extension direction of the water inlet channel (2101), and the interval between the two flow-guiding members forms the flow-guiding channel (2102).

4. The water inlet structure for a water heater according to claim 3, characterized in that: The flow guiding device (200) further comprises a connecting piece (220), wherein the connecting piece (220) is used to connect all the flow guiding pieces, and the flow guiding device (200) is connected to the water inlet inner pipe (100) via the connecting piece (220).

5. The water inlet structure for a water heater according to claim 4, characterized in that: The number of the connecting members (220) is at least two, and at least two of the connecting members (220) are arranged at intervals along the circumference of the flow guide member.

6. The water inlet structure for a water heater according to claim 4, characterized in that: Each group of the inner water outlet holes comprises a plurality of inner water outlet holes (1031) arranged at intervals along the circumference of the water inlet inner tube (100), and an angle θ between the inner water outlet holes (1031) located at both ends of the plurality of inner water outlet holes (1031) of each group of the inner water outlet holes is less than 180°.

7. The water inlet structure for a water heater according to claim 6, characterized in that: The number of the connecting member (220) is one, the connecting member (220) is an arc-shaped plate, and the extension direction of the axis of the connecting member (220) is the same as the extension direction of the water inlet channel (2101), the cross-sectional shape of the guide member is fan-shaped, the two ends of the guide member are respectively connected to the two sides of the opening of the arc-shaped plate, and the central angle of the fan-shaped cross-section of the guide member is greater than θ.

8. The water inlet structure for a water heater according to claim 3, characterized in that: The cross-sectional shape of the flow guide is annular, the axial direction of the flow guide is the same as the extension direction of the water inlet channel (2101), and the outer peripheral wall of the flow guide abuts against the inner wall of the water inlet inner tube (100).

9. The water inlet structure for a water heater according to claim 1 or 2, characterized in that: The water inlet structure for the water heater further comprises an outer water inlet pipe (300), wherein the outer water inlet pipe (300) is sleeved outside the inner water inlet pipe (100), and an outgoing water hole (301) is arranged on the side wall of the outer water inlet pipe (300), and the outgoing water hole (301) is arranged alternately with the inner water outlet hole group.

10. A water heater, characterized in that: The invention comprises an inner tank (1000) and a water inlet structure for a water heater as claimed in any one of claims 1 to 9, wherein a closed end of an inner water inlet tube (100) of the water inlet structure for a water heater is arranged in the inner tank (1000), and an open end of the inner water inlet tube (100) extends out of the inner tank (1000) and can be connected to an external water source.

Images