Air supply structure and electric water heater

Abstract

The utility model belongs to the technical field of electric water heaters, and discloses an air supply structure and an electric water heater. According to the air supply structure, a wind wheel motor is supported by a first supporting structure, and the wind wheel motor is clamped between a motor cover plate and the first supporting structure; meanwhile, a rotating part connected with the cross-flow wind wheel is supported by the second supporting structure, and the rotating part is clamped between the wind wheel cover plate and the second supporting structure, so that one axial end of the cross-flow wind wheel is rotatably mounted between the wind wheel cover plate and the second supporting structure through the rotating part; the first supporting structure and the second supporting structure limit the cross-flow wind wheel and the wind wheel motor in the axial direction, the motor cover plate and the wind wheel cover plate limit the cross-flow wind wheel and the wind wheel motor in the radial direction, the stability of the cross-flow wind wheel in the rotating process is effectively improved, noise generated by shaking of the cross-flow wind wheel and the wind wheel motor is reduced, and the service life of the cross-flow wind wheel and the wind wheel motor is prolonged. And noise in the working process of the air supply structure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric water heaters, in particular to an air supply structure and an electric water heater. Background Art

[0002] Existing electric water heaters are designed to produce hot water for users. In winter, the temperature inside the bathroom is low, and the ambient temperature is low when users bathe, resulting in a poor bathing experience. To address this issue, existing technologies have proposed equipping electric water heaters with heating systems. However, these heating systems are found to be noisy during use. Utility Model Content

[0003] One of the technical problems solved by the utility model is to provide an air supply structure that can reduce noise and improve stability.

[0004] The second technical problem solved by the present invention is to provide an electric water heater that reduces noise, improves stability, and enhances user experience.

[0005] The first technical problem mentioned above is solved by the following technical solution:

[0006] Air supply structure, including:

[0007] An air supply housing, wherein the inner bottom wall of the air supply housing is protruded with a first supporting structure and a second supporting structure axially spaced apart, the first supporting structure is connected to a motor cover located above it, and the second supporting structure is connected to a wind wheel cover located above it;

[0008] a crossflow rotor, one end of which is connected to a rotating member, the rotating member being sandwiched between the rotor cover and the second supporting structure in both the radial and axial directions of the crossflow rotor;

[0009] The wind wheel motor is coaxially arranged with the crossflow wind wheel, and the output shaft of the wind wheel motor is connected to the other end of the crossflow wind wheel to drive the crossflow wind wheel to rotate; the wind wheel motor is clamped between the motor cover and the first supporting structure along the radial and axial directions of the crossflow wind wheel.

[0010] Compared with the background technology, the air supply structure of the present invention has the following beneficial effects:

[0011] The air supply structure provided by the utility model is characterized in that the wind wheel motor is supported by a first supporting structure, and the wind wheel motor is clamped between the motor cover and the first supporting structure; at the same time, the rotating part connected to the cross-flow wind wheel is supported by the second supporting structure, and the rotating part is clamped between the wind wheel cover and the second supporting structure, so that one axial end of the cross-flow wind wheel can be rotatably installed between the wind wheel cover and the second supporting structure through the rotating part, the first supporting structure and the second supporting structure limit the cross-flow wind wheel and the wind wheel motor in the axial direction, and the motor cover and the wind wheel cover limit the cross-flow wind wheel and the wind wheel motor in the radial direction, effectively improving the stability of the cross-flow wind wheel during rotation, thereby reducing the noise generated by the shaking of the cross-flow wind wheel and the wind wheel motor, and reducing the noise during the operation of the air supply structure.

[0012] In one embodiment, the air supply housing has an air supply channel, with an air inlet and an air outlet formed at both ends of the air supply channel respectively, and a first volute tongue guide wall and a second volute tongue guide wall extending along the circumference of the crossflow impeller are formed on the upper inner wall of the air supply channel, wherein the first volute tongue guide wall is located on a side of the second volute tongue guide wall close to the air inlet;

[0013] The first volute tongue guide wall is an arc surface with a distance R1 from the central axis of the cross-flow wind wheel, and the distance between the second volute tongue guide wall and the central axis of the cross-flow wind wheel is R2, R1<R2, and R2 gradually increases from the air outlet to the air inlet.

[0014] In one embodiment, the extending direction of the first volute tongue guide wall from one end thereof connected to the second volute tongue guide wall to the other end is the rotation direction of the crossflow impeller;

[0015] The crossflow rotor includes a rotor shaft and a plurality of blades sequentially arranged circumferentially around the rotor shaft, wherein two ends of the blades respectively form a proximal end and a distal end, and the proximal end is closer to the rotor shaft than the distal end;

[0016] In any two adjacent blades distributed along the rotation direction of the crossflow impeller, the proximal end of the downstream blade is located between the proximal end of the upstream blade and the distal end of the upstream blade.

[0017] In one embodiment, the minimum radial gap between the second volute tongue guide wall and the maximum outer diameter of the crossflow wind wheel is dmin, and the maximum radial gap between the second volute tongue guide wall and the maximum outer diameter of the crossflow wind wheel is dmax; the ratio of dmax to dmin is less than or equal to 1.5.

[0018] In one embodiment, a heating component is provided in the air supply channel and is located downstream of the cross-flow impeller. In the direction from the air inlet to the air outlet, the heating component is located downstream of the cross-flow impeller, and the air supply channel located upstream of the cross-flow impeller forms an air inlet channel, and the air supply channel located downstream of the cross-flow impeller forms an air outlet channel.

[0019] Two heat insulation plates are provided in the air supply housing and are spaced apart along the axial direction of the crossflow impeller. The two heat insulation plates divide the inner cavity of the air supply housing into two installation chambers that are directly connected to the outside atmosphere, and the air supply channel located between the two installation chambers. Both of the installation chambers are connected to the air inlet channel.

[0020] The first supporting structure is disposed in one of the installation cavities, and the second supporting structure is disposed in the other installation cavity.

[0021] In one embodiment, a waterproof sleeve is provided in the air supply channel, the waterproof sleeve is located between the heating component and the air inlet, and the waterproof sleeve passes through the air supply housing (1), and the waterproof sleeve is used for the pipeline to pass through.

[0022] In one embodiment, the air supply structure also includes a sterilization component, the installation end of the sterilization component is arranged in the installation chamber and installed on the insulation board forming the installation chamber, the working end of the sterilization component passes through the insulation board and is placed in the air supply channel, and the sterilization component is used to sterilize the airflow flowing in the air supply channel.

[0023] In one embodiment, the air supply housing includes a first air outlet wall and a second air outlet wall forming two opposite side walls of the air outlet;

[0024] One end of the heating component is clamped to the second air outlet wall, and the other end of the heating component is connected to the first air outlet wall through a fastener.

[0025] In one embodiment, the heating assembly comprises:

[0026] A heating grille, wherein the heating grille has an installation slot, and an outlet direction of the installation slot faces away from the air outlet direction of the air outlet;

[0027] a heating unit, the heating unit being located in the mounting slot and mounted on the heating grid;

[0028] A thermostat is installed on the heating grid with one end extending into the installation chamber, and the other end is inserted into the heating grid and electrically connected to the heating unit. The thermostat is used to control the start and stop of the heating unit.

[0029] The second technical problem mentioned above is solved by the following technical solution:

[0030] An electric water heater comprises a water heater shell and an air supply structure as described in any of the above embodiments, wherein the air supply shell is installed at the bottom of the water heater shell.

[0031] Compared with the background technology, the electric water heater of the present invention has the following beneficial effects:

[0032] The electric water heater provided by the embodiment of the present invention includes the above-mentioned air supply structure, wherein the wind wheel motor is supported by the first supporting structure, and the wind wheel motor is clamped between the motor cover and the first supporting structure; at the same time, the rotating part connected to the cross-flow wind wheel is supported by the second supporting structure, and the rotating part is clamped between the wind wheel cover and the second supporting structure, so that one axial end of the cross-flow wind wheel can be rotatably installed between the wind wheel cover and the second supporting structure through the rotating part, the first supporting structure and the second supporting structure limit the cross-flow wind wheel and the wind wheel motor in the axial direction, and the motor cover and the wind wheel cover limit the cross-flow wind wheel and the wind wheel motor in the radial direction, effectively improving the stability of the cross-flow wind wheel during rotation, thereby reducing the noise generated by the shaking of the cross-flow wind wheel and the wind wheel motor, and reducing the noise during the operation of the air supply structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a first exploded view of the air supply structure provided by an embodiment of the present utility model;

[0034] Figure 2 This is a first cross-sectional view of the air supply structure provided by an embodiment of the present utility model;

[0035] Figure 3 This is a second cross-sectional view of the air supply structure provided by an embodiment of the present utility model;

[0036] Figure 4 yes Figure 1 A partial enlarged view of point E in the middle;

[0037] Figure 5 yes Figure 1 A partial enlarged view of point F in the middle;

[0038] Figure 6 yes Figure 2 A partial enlarged view of point I in the middle;

[0039] Figure 7 This is a second exploded view of the air supply structure provided by an embodiment of the present utility model;

[0040] Figure 8 This is a third cross-sectional view of the air supply structure provided by an embodiment of the present utility model;

[0041] Figure 9 This is a fourth cross-sectional view of the air supply structure provided by an embodiment of the present utility model;

[0042] Figure 10 yes Figure 1 A partial enlarged view of the H in the middle;

[0043] Figure 11 yes Figure 1 A partial enlarged view of the M in the middle;

[0044] Figure 12 yes Figure 9 A local enlarged schematic diagram of point P in the middle;

[0045] Figure 13 is a cross-sectional view of an electric water heater provided by an embodiment of the utility model;

[0046] Figure 14 This is a schematic diagram of airflow noise simulation of the air supply structure provided by an embodiment of the present utility model;

[0047] Figure 15 It is a structural schematic diagram of the electric water heater provided by an embodiment of the utility model.

[0048] In the picture:

[0049] 1. Air supply housing; 11. Upper cover; 111. First sealing surface; 112. Second sealing surface; 113. Positioning groove; 114. Third sealing surface; 115. Annular groove; 116. Pipe hole; 12. Outer cover; 121. First air outlet wall; 1211. First position-limiting protrusion; 122. Second air outlet wall; 1221. Clamping hole; 1222. Plate body; 1223. Sealing plate; 1224. Wiring plate; 1225. Wiring hole; 123. Positioning protrusion; 124. Fastening Boss; 125, front wall; 1251, receiving groove; 1252, avoidance hole; 126, waterproof sleeve; 1261, through hole; 13, heat insulation board; 13a, first heat insulation board; 13b, second heat insulation board; 131, through hole; 132, air hole; 14, first supporting structure; 141, first supporting groove; 142, first mounting limit surface; 15, second supporting structure; 151, second supporting groove; 16, wind wheel cover; 17, motor cover; 18, first sewage cover;

[0050] 110, air supply channel; 1101, first air outlet channel; 1102, second air outlet channel; 1103, first volute tongue guide wall; 1104, second volute tongue guide wall; 1105, first gap; 1106, second gap; 1107, air inlet channel; 1108, air inlet guide wall; 1109, air outlet guide wall; 120, installation chamber; 130, air inlet; 140, air outlet;

[0051] 2. Crossflow rotor; 21. Blades; 221. Proximal end; 222. Distal end; 22. Rotor shaft;

[0052] 3. Wind turbine motor;

[0053] 4. Heating assembly; 41. Heating grille; 411. Clamping protrusion; 412. Second limiting protrusion; 413. Temperature control mounting through hole; 414. Mounting slot; 42. Heating unit; 43. Thermostat;

[0054] 5. Sterilization components; 6. Rotating parts;

[0055] 71. Oscillating plate; 72. Rotating rod; 73. Oscillating motor;

[0056] 8. Air intake grille;

[0057] 91. Water heater shell; 92. Inner tank; 93. Drain pipe; 94. Second drain cover; 95. Water pipe joint. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0059] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0060] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0061] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0062] For ease of description and understanding, in an embodiment of the present invention, when a side of the control panel is set facing the electric water heater, the side of the battery water heater facing the user is the front side, and the side of the battery water heater facing away from the user is the rear side.

[0063] Some embodiments of the present invention provide an air supply structure and an electric water heater. The electric water heater includes an air supply structure. The air supply structure can selectively provide hot air or ambient air according to user needs, or sterilize and purify the air in the bathroom, thereby improving the environmental quality in the bathroom and enhancing the user experience.

[0064] like Figures 1 to 3 As shown, the air supply structure includes an air supply shell 1, a cross-flow impeller 2, a impeller motor 3, a heating component 4 and a sterilization component 5, wherein the air supply shell 1 is provided with an air supply channel 110, and an air inlet 130 and an air outlet 140 are formed at both ends of the air supply channel 110 respectively.

[0065] The cross-flow impeller 2 is rotatably arranged in the air supply channel 110, so that the air flow in the air supply channel 110 can flow from the air inlet 130 to the air outlet 140; the impeller motor 3 is installed in the air supply housing 1, and the output shaft of the impeller motor 3 is connected to the cross-flow impeller 2 to drive the cross-flow impeller 2 to rotate.

[0066] The heating component 4 is disposed in the air supply channel 110 , and the sterilization component 5 is installed in the air supply housing 1 for sterilizing the air flow flowing in the air supply channel 110 .

[0067] Only the impeller motor 3 can be controlled to operate. For example, when the temperature in the bathroom is high, the impeller motor 3 drives the crossflow impeller 2 to rotate, and the air in the bathroom enters the air supply channel 110 through the air inlet 130, and is sent to the air outlet 140 by the crossflow impeller 2 and returns to the bathroom through the air outlet 140, which can effectively accelerate the air circulation in the bathroom and reduce the temperature in the bathroom.

[0068] The heating component 4 and the wind wheel motor 3 can also be controlled to work at the same time. For example, when the temperature in the bathroom is low, the low-temperature air in the bathroom enters the air supply channel 110 through the air inlet 130, and the wind wheel motor 3 drives the cross-flow wind wheel 2 to rotate to make the air flow in the air supply channel 110 flow. The air flow circulating in the air supply channel 110 is heated by the heating component 4, and the heated air returns to the bathroom through the air outlet 140, so as to achieve the purpose of increasing the air temperature in the bathroom.

[0069] The operation of the sterilization component 5 and the wind wheel motor 3 can also be controlled simultaneously. For example, after the bathroom is used, the humid air in the bathroom enters the air supply channel 110 through the air inlet 130, and the wind wheel motor 3 drives the cross-flow impeller 2 to rotate to make the air flow in the air supply channel 110 flow. The air flow circulating in the air supply channel 110 is sterilized by the sterilization component 5, and the air after sterilization is returned to the bathroom through the air outlet 140 to achieve the purpose of purifying the air in the bathroom.

[0070] The air supply structure provided by the embodiment of the present utility model can selectively provide hot air or ambient air according to the needs of the user, or sterilize and purify the air in the bathroom, effectively improving the environmental quality in the bathroom and enhancing the user experience.

[0071] In some embodiments, as Figure 1 、 Figure 4 and Figure 5 As shown, a first supporting structure 14 is protruded from the inner bottom wall of the air supply housing 1, and the first supporting structure 14 is connected to a motor cover 17 located above it. A second supporting structure 15 is protruded from the inner bottom wall of the air supply housing 1, and the second supporting structure 15 is connected to a wind wheel cover 16 located above it. The first supporting structure 14 and the second supporting structure 15 are arranged at intervals along the axial direction of the cross-flow wind wheel 2.

[0072] The wind wheel motor 3 and the crossflow wind wheel 2 are coaxially arranged, and one axial end of the crossflow wind wheel 2 is connected to the rotating part 6, and the rotating part 6 is clamped between the wind wheel cover 16 and the second support structure 15 along the radial and axial directions of the crossflow wind wheel 2; the other axial end of the crossflow wind wheel 2 is connected to the output shaft of the wind wheel motor 3, and the wind wheel motor 3 is clamped between the motor cover 17 and the first support structure 14 along the radial and axial directions of the crossflow wind wheel 2.

[0073] The wind wheel motor 3 is supported by the first supporting structure 14, and the wind wheel motor 3 is clamped between the motor cover 17 and the first supporting structure 14; at the same time, the rotating part 6 connected to the cross-flow wind wheel 2 is supported by the second supporting structure 15, and the rotating part 6 is clamped between the wind wheel cover 16 and the second supporting structure 15, so that one axial end of the cross-flow wind wheel 2 is rotatably installed between the wind wheel cover 16 and the second supporting structure 15 through the rotating part 6, the first supporting structure 14 and the second supporting structure 15 limit the cross-flow wind wheel 2 and the wind wheel motor 3 in the axial direction, and the motor cover 17 and the wind wheel cover 16 limit the cross-flow wind wheel 2 and the wind wheel motor 3 in the radial direction, effectively improving the stability of the cross-flow wind wheel 2 during rotation, thereby reducing the noise generated by the shaking of the cross-flow wind wheel 2 and the wind wheel motor 3, and reducing the noise during the operation of the air supply structure.

[0074] In some embodiments, the first support structure 14 and the motor cover 17 are detachably connected, and the second support structure 15 and the wind wheel cover 16 are detachably connected, which is convenient for later maintenance and replacement of the wind wheel motor 3 and the crossflow wind wheel 2.

[0075] Exemplarily, the motor cover 17 is fastened to the first supporting structure 14 , and the wind wheel cover 16 is fastened to the second supporting structure 15 .

[0076] Such an arrangement facilitates the disassembly and assembly of the wind wheel motor 3 and the crossflow wind wheel 2 , and has high disassembly and assembly efficiency, which is beneficial for the later maintenance and replacement of the wind wheel motor 3 and the crossflow wind wheel 2 .

[0077] Exemplarily, the cross-flow wind wheel 2 includes a wind wheel shaft 22 and a plurality of blades 21 arranged on the wind wheel shaft 22. One axial end of the wind wheel shaft 22 is rotatably mounted between the wind wheel cover 16 and the second support structure 15 through a rotating member 6. By setting the rotating member 6, the rotation smoothness of the cross-flow wind wheel 2 can be improved and friction can be reduced.

[0078] Exemplarily, two first support structures 14 are provided, spaced apart along the axial direction of the rotor shaft 22. Each first support structure 14 is provided with a first support slot 141 having a first top opening and a first side opening. The ends of the rotor motor 3 are respectively placed within the first support slots 141, with the bottom walls of the first support slots 141 supporting the rotor motor 3. The first side openings of the first support slots 141 are arranged opposite each other along the axial direction of the rotor shaft 22. The slot walls of each first support slot 141, facing its first side opening, form a first mounting stop surface 142. The rotor motor 3 is sandwiched between the two first mounting stop surfaces 142 along the axial direction of the rotor shaft 22, thereby limiting the position of the rotor motor 3 along the axial direction of the rotor shaft 22. Furthermore, using two first support structures 14 spaced apart along the axial direction of the rotor shaft 22 to support the rotor motor 3 can reduce the weight of the air supply structure while meeting the support requirements for the rotor motor 3.

[0079] A first accommodating groove with an opening facing downward is provided on the motor cover 17, and the part of the wind wheel motor 3 extending out of the first top opening of the first support groove 141 is accommodated in the first accommodating groove. The wind wheel motor 3 is clamped between the groove wall of the first support groove 141 and the groove bottom wall of the first accommodating groove along the radial direction of the wind wheel shaft 22 to limit the wind wheel motor 3 along the radial direction of the wind wheel shaft 22.

[0080] By limiting the wind rotor motor 3 along the axial direction of the crossflow wind rotor 2 and the radial direction of the wind rotor shaft 22, the stability of the wind rotor motor 3 can be improved, thereby improving the stability of the wind rotor motor 3 during rotation.

[0081] The second supporting structure 15 has a second supporting groove 151, which has a second top opening and a second side opening. The rotating member 6 is arranged in the second supporting groove 151, and the rotating member 6 is supported by the groove wall of the second supporting groove 151. The wind wheel cover 16 has a second accommodating groove with an opening facing downward. The rotating member 6 is arranged in a space surrounded by the groove wall of the second supporting groove 151 and the groove wall of the second accommodating groove. The rotating member 6 is clamped between the groove wall of the second supporting groove 151 and the groove wall of the second accommodating groove along the radial direction of the wind wheel shaft 22, so as to limit the second supporting structure 15 along the radial direction of the wind wheel shaft 22.

[0082] One end of the wind wheel shaft 22 passes through the second side opening and is connected to the inner ring of the rotating part 6. The second support groove 151 has two second mounting limit surfaces arranged opposite to each other along the axial direction of the wind wheel shaft 22. The rotating part 6 is clamped between the two second mounting limit surfaces along the axial direction of the wind wheel shaft 22 to limit the rotating part 6 along the axial direction of the wind wheel shaft 22.

[0083] By limiting the rotating member 6 along the axial direction of the crossflow rotor 2 and limiting the rotating member 6 along the radial direction of the crossflow rotor 2, the stability of the rotating member 6 can be improved, thereby improving the stability of the crossflow rotor 2 during rotation. By limiting the rotating member 6 along the axial and radial directions of the crossflow rotor 2 and limiting the rotor motor 3 along the axial and radial directions of the crossflow rotor 2, the stability of the air supply structure during operation can be improved and noise can be reduced.

[0084] In some embodiments, as Figures 1 to 5 As shown, a heating component 4 is provided in the air supply channel 110 and is located downstream of the cross-flow impeller 2. From the air inlet 130 to the air outlet 140, the air supply channel 110 located upstream of the cross-flow impeller forms an air inlet channel 1107, and the air supply channel 110 located downstream of the cross-flow impeller 2 forms an air outlet channel.

[0085] Two heat shields 13 are installed within the air supply housing 1, spaced apart along the axial direction of the crossflow impeller 2. These divide the interior of the air supply housing 1 into two mounting chambers 120, both of which are directly connected to the outside atmosphere, and an air supply passage 110 located between the two mounting chambers 120. Both mounting chambers 120 are connected to the air inlet passage 1107. The first support structure 14 is installed within one of the mounting chambers 120, and the second support structure 15 is installed within the other mounting chamber 120.

[0086] When the wind wheel motor 3 drives the crossflow wind wheel 2 to rotate, the heating assembly 4 operates, and outside air enters the two installation chambers 120 and the air inlet channel 1107. The air in the two installation chambers 120 enters the air inlet channel 1107, and then, under the action of the crossflow wind wheel 2, enters the air outlet channel, is heated by the heating assembly 4, and then flows out. This arrangement achieves a significant increase in the air intake volume by simultaneously utilizing the two installation chambers 120 and the air inlet channel 1107, compared to using only the air inlet channel 1107 for air intake.

[0087] Since the wind rotor motor 3 drives the crossflow wind rotor 2 to rotate, the wind rotor motor 3 generates heat, and the rotation of the rotating part 6 generates friction heat. The first support structure 14 and the second support structure 15 are respectively arranged in the two installation chambers 120. When the outside air enters the installation chamber 120 and the air inlet channel 1107 in turn, it can take away the heat in the two installation chambers 120, so that the rotating part 6 and the wind rotor motor 3 work in a lower temperature environment, thereby extending the service life of the rotating part 6 and the wind rotor motor 3.

[0088] In some embodiments, both installation chambers 120 are disconnected from the air outlet duct. Since both installation chambers 120 are disconnected from the air outlet duct and the heat insulation plate 13 has a heat insulation function, the heat transferred into the two installation chambers 120 through the heat insulation plate 13 can be minimized, maintaining a lower temperature within the installation chambers 120. This allows the wind wheel motor 3 and the rotating member 6 to operate at a lower temperature, extending the service life of the wind wheel motor 3 and the rotating member 6. Furthermore, the hot air can be concentrated in the air outlet duct and delivered into the bathroom through the air outlet 140, thereby improving the utilization rate of heat energy. Optionally, the rotating member 6 is a bearing.

[0089] In some embodiments, as Figure 2 、 Figures 4 to 6As shown, the air supply housing 1 includes an outer housing 12 and an upper cover 11 positioned above the outer housing 12. Heat insulation plates 13 are fixed to the inner bottom wall of the outer housing 12. Both heat insulation plates 13 are provided with upwardly opening holes 131, allowing the axial ends of the crossflow impeller 2 to pass through the two holes 131 and into the two mounting chambers 120. The inner wall of the upper cover 11 is provided with a first sealing surface 111 and a second sealing surface 112. The first sealing surface 111 forms a surface-contact seal with one of the heat insulation plates 13, and the second sealing surface 112 forms a surface-contact seal with the other heat insulation plate 13, so that the outer housing 12, the upper cover 11, and the two heat insulation plates 13 enclose an air outlet passage that is not connected to the two mounting chambers 120. This arrangement improves the sealing performance at the connection between the heat insulation plates 13 and the upper cover 11, preventing hot air in the air outlet passage from leaking into the mounting chambers 120 through the connection between the heat insulation plates 13 and the upper cover 11.

[0090] The through hole 131 is a U-shaped hole with an upward opening and is arranged to pass through along the axial direction of the wind wheel shaft 22. When installing the cross-flow wind wheel 2, the wind wheel shaft 22 at both ends of the cross-flow wind wheel 2 falls into the through hole 131 below, which is conducive to cooperating with the first support structure 14 and the second support structure 15 to install the cross-flow wind wheel 2. For the convenience of description, the two heat insulation plates 13 are respectively recorded as the first heat insulation plate 13a and the second heat insulation plate 13b. The inner wall of the upper cover 11 is provided with a first sealing surface 111 and a second sealing surface 112. The first sealing surface 111, the first heat insulation plate 13a, the second heat insulation plate 13b and the second sealing surface 112 are arranged in sequence along the axial direction of the cross-flow wind wheel 2. The first heat insulation plate 13a is in surface contact and sealing with the first sealing surface 111 along the axial direction of the cross-flow wind wheel 2, and the second heat insulation plate 13b is in surface contact and sealing with the second sealing surface 112 along the axial direction of the cross-flow wind wheel 2, so that the first heat insulation plate 13a and the second heat insulation plate 13b divide the inner cavity of the air supply shell 1 into the air supply channel 110 and the two installation chambers 120, and the air outlet channel and the two installation chambers 120 are not connected. Exemplarily, the first heat insulation plate 13 a and the first support structure 14 are located at the same axial end of the crossflow rotor 2 , and the second heat insulation plate 13 b and the second support structure 15 are located at the same axial end of the crossflow rotor 2 .

[0091] The gap between the inner wall of the through-hole 131 and the rotor shaft 22 forms a wind-passing gap, and the installation chamber 120 is connected to the air inlet channel 1107 through the wind-passing gap. This not only allows the air in the installation chamber 120 to enter the air inlet channel 1107 through the wind-passing gap, but also prevents friction between the rotor shaft 22 and the inner wall of the through-hole 131, and facilitates the rotor shaft 22 at both ends of the cross-flow rotor 2 to fall into the through-hole 131 below. In order to increase the communication opening between the installation chamber 120 and the air inlet channel 1107, the heat insulation board 13 is further provided with a wind-passing hole 132. The installation chamber 120 is connected to the air inlet channel 1107 through the wind-passing hole 132, so that the air in the installation chamber 120 can enter the air inlet channel 1107 through the wind-passing hole 132.

[0092] In some embodiments, the heat insulation board 13 is integrally formed with the outer cover 12. In other words, the heat insulation board 13 and the outer cover 12 are both made of heat insulation material. The two heat insulation boards 13 are integrally formed with the outer cover 12, which is simple and low-cost.

[0093] In other embodiments, the heat insulation board 13 may also be configured as a heat insulation body and a heat insulation layer coated on the surface of the heat insulation body.

[0094] In some embodiments, the upper cover 11 and the outer cover 12 are detachably connected to facilitate the later maintenance of the components in the air supply housing 1. For example, the upper cover 11 and the outer cover 12 are fastened together. Specifically, Figure 1 、 Figure 2 and Figure 7 As shown, one of the upper cover 11 and the outer cover 12 is provided with a positioning protrusion 123, and the other is provided with a positioning groove 113. The positioning protrusion 123 and the positioning groove 113 are plugged in the vertical direction to position the upper cover 11 and the outer cover 12, so as to facilitate the subsequent fastening connection of the upper cover 11 and the outer cover 12.

[0095] Exemplarily, two positioning protrusions 123 are provided on the outer cover 12. The positioning protrusions 123 extend along the length of the outer cover 12 and are spaced apart along the width of the outer cover 12. The positioning grooves 113 correspond to the positioning protrusions 123 in a one-to-one manner. The inner bottom wall of the outer cover 12 is provided with a plurality of circumferentially spaced fastening bosses 124. The upper cover 11 is provided with fastening holes corresponding to the fastening bosses 124 in a one-to-one manner. The fastening bosses 124 and the corresponding fastening holes are connected by fasteners. The length direction, width direction, and vertical direction of the outer cover 12 are perpendicular to each other.

[0096] The upper cover 11 and the outer housing 12 are positioned by inserting the positioning protrusion 123 and the positioning groove 113 in the vertical direction, so that the fastening boss 124 and the fastening hole are aligned, which facilitates connecting the fastening boss 124 and the corresponding fastening hole through fasteners.

[0097] It should be noted that the length direction of the outer cover 12 refers to the left and right direction of the user when facing the control panel of the electric water heater; the width direction of the outer cover 12 refers to the front and back direction when the user faces the control panel of the electric water heater, and the air outlet 140 is located on the front side of the electric water heater.

[0098] In some embodiments, as Figure 1 and Figure 8 As shown, the installation end of the sterilization component 5 is arranged in the installation chamber 120 and installed on the insulation board 13 forming the installation chamber 120 , and the working end of the sterilization component 5 passes through the insulation board 13 and is placed in the air supply channel 110 .

[0099] Specifically, a sterilization installation through hole is provided on the second insulation board 13b. The working end of the sterilization component 5 passes through the sterilization installation through hole and extends into the air supply channel 110. The installation end of the sterilization component 5 is fastened to the second insulation board 13b. The sterilization component 5 is easy and quick to disassemble and assemble.

[0100] The working end of the sterilization component 5 is passed through the insulation board 13 and extended into the air supply channel 110, which is conducive to the sterilization component 5 to directly sterilize the air in the air supply channel 110; the installation end of the sterilization component 5 is set in the installation chamber 120, and the sterilization component 5 is placed in the installation chamber 120 with a lower temperature, which is conducive to extending the service life of the sterilization component 5; the installation end of the sterilization component 5 is fastened to the insulation board 13, the installation method of the sterilization component 5 is simple, and the disassembly and assembly efficiency is high.

[0101] In some embodiments, the mounting end of the sterilization component 5 and the wind wheel motor 3 are arranged in the same mounting chamber 120, so as to facilitate the access of wires to supply power to the sterilization component 5 and the wind wheel motor 3.

[0102] In some embodiments, the sterilization component 5 is a negative ion generator. In other embodiments, the sterilization component 5 may also adopt an ultraviolet sterilization structure.

[0103] In some embodiments, as Figure 1 、 Figures 9 to 12 As shown, the air supply shell 1 includes a first air outlet wall 121 and a second air outlet wall 122 that are oppositely arranged to form an air outlet 140. One end of the heating component 4 is clamped with the second air outlet wall 122, and the other end of the heating component 4 is connected to the first air outlet wall 121 through a fastener.

[0104] Specifically, the first air outlet wall 121 is provided with a first limiting protrusion 1211. When the heating component 4 is engaged with the second air outlet wall 122, the heating component 4 can rotate relative to the air supply shell 1 to make the heating component 4 abut against the first limiting protrusion 1211. The first limiting protrusion 1211 serves to position the heating component 4, making it convenient to subsequently use fasteners to connect the heating component 4 to the first air outlet wall 121.

[0105] Exemplarily, the second air outlet wall 122 is disposed above the first air outlet wall 121, the air outlet 140 is disposed on the outer cover 12, the second air outlet wall is provided with a latching hole 1221, and the top of the heating component 4 is provided with a latching protrusion 411. There are multiple latching holes 1221, and the multiple latching holes 1221 are spaced apart along the axial direction of the wind wheel shaft 22, with the latching protrusions 411 corresponding to the latching holes 1221. The bottom of the heating component 4 is provided with a second limiting protrusion 412. When the locking protrusion 411 is inserted into the locking hole 1221, the heating component 4 can rotate relative to the air supply housing 1 to abut the second limiting protrusion 412 against the first limiting protrusion 1211.

[0106] In other embodiments, the latching protrusion may be provided on the second air outlet wall, and the latching hole may be provided on the heating component; the second air outlet wall may also be provided below the first air outlet wall.

[0107] The process of installing the heating component 4 on the outer cover 12 is as follows: insert the heating component 4 into the air outlet 140, and insert the locking protrusion 411 into the locking hole 1221, and then rotate the heating component 4 toward the air outlet 140 until the second limiting protrusion 412 abuts against the first limiting protrusion 1211, and then fasten the bottom of the heating component 4 and the first air outlet wall 121. The heating component 4 is easy to assemble and disassemble, and has high stability, which is beneficial to reducing noise during the operation of the air supply structure.

[0108] In some embodiments, as Figure 1 、 Figures 9 to 11 As shown, the heating assembly 4 includes a heating grille 41 and a heating unit 42. The heating grille 41 has a mounting slot 414, the outlet of which faces away from the air outlet 140. The heating unit 42 is placed in the mounting slot 414 and can be mounted on the heating grille 41. The installation of the heating grille 41 can improve the temperature uniformity of the outlet air. For example, the heating unit 42 is connected to the heating grille 41 via multiple heating fasteners, which are spaced apart along the axial direction of the wind wheel shaft 22.

[0109] In some embodiments, as Figure 1 、 Figures 9 to 11As shown, the heating assembly 4 further includes a thermostat 43. The thermostat 43 is mounted on the heating grille 41 with one end extending into the mounting chamber 120. The other end of the thermostat 43 is inserted into the heating grille 41 and electrically connected to the heating unit 42. The thermostat 43 is used to control the start and stop of the heating unit 42. Exemplarily, the heating unit 42 is a PTC heater.

[0110] Specifically, a temperature control mounting hole 413 is provided on the top of the heating grille 41. The lower end of the thermostat 43 passes through the temperature control mounting hole 413 and is electrically connected to the heating unit 42. The thermostat 43 is connected to the heating grille 41 through two temperature control fasteners distributed at 180°.

[0111] The upper end of the thermostat 43 is passed through the second air outlet wall 122 and then extended into the installation chamber 120. This allows the thermostat 43 to be placed in a relatively low temperature environment, thereby protecting the thermostat 43 and extending its service life. Furthermore, it facilitates connecting the thermostat 43 to a power source. The thermostat 43 is securely connected to the heating grille 41, making installation of the thermostat 43 simple and quick and easy.

[0112] In some embodiments, as Figure 1 、 Figure 2 、 Figure 7 and Figure 13 As shown, a waterproof sleeve 126 is provided in the air supply channel 110 , and the waterproof sleeve 126 is located between the heating component 4 and the air inlet 130 . The waterproof sleeve 126 passes through the air supply housing 1 , and is used for the pipeline to pass through.

[0113] Specifically, a waterproof sleeve 126 is protruding from the inner bottom wall of the outer cover 12. The waterproof sleeve 126 has a through hole 1261 that is arranged to penetrate along the vertical direction. The lower end of the through hole 1261 extends to the outer bottom wall of the outer cover 12. The waterproof sleeve 126 is sealed and connected to the upper cover 11. The upper cover 11 is provided with through holes 116 that correspond one-to-one to the through holes 1261. The through holes 1261 are connected to the corresponding through holes 116 to form a through channel.

[0114] The electric water heater also includes an inner tank 92, a cold water inlet pipe and a hot water outlet pipe. The cold water inlet pipe and the hot water outlet pipe are both connected to a water pipe joint 95. The two water pipe joints 95 are respectively connected to the water inlet and water outlet of the inner tank 92. The two water pipe joints 95 are each equipped with a waterproof sleeve 126. The water pipe joints 95 are passed through the corresponding pipe passage to reduce the situation where water leaks from the water pipe joints 95 and causes water to enter the air supply channel 110, thereby improving the waterproof performance.

[0115] Exemplarily, the upper end of the waterproof sleeve 126 abuts against the inner wall of the upper cover 11 and forms a surface contact seal, thereby being able to seal the contact position between the waterproof sleeve 126 and the upper cover 11 .

[0116] Illustratively, the waterproof sleeve 126 and the outer cover 12 are integrally formed, which can improve the sealing effect between the waterproof sleeve 126 and the outer cover 12, simplify the processing of the outer cover 12 and the waterproof sleeve 126, reduce processing costs, and simplify assembly.

[0117] In some embodiments, as Figure 1 and Figure 8 As shown, the air supply structure also includes a swing plate 71, two swing motors 73 and two rotating rods 72. The two swing motors 73 are respectively installed in two installation chambers 120 and are arranged one-to-one with the two rotating rods 72. One end of the rotating rod 72 is connected to the output shaft of the corresponding swing motor 73, and the other end of the rotating rod 72 is rotatable around the output shaft of the corresponding swing motor 73 and passes through the outer cover 12 and is connected to the corresponding swing plate 71. The swing motor 73 drives the rotating rod 72 to drive the swing plate 71 to rotate to open and close the air outlet 140.

[0118] A swing motor 73 is disposed at each end of the lengthwise direction of the swing plate 71. The two swing motors 73 are controlled to operate synchronously to drive the swing plate 71 to rotate. The forces at both ends of the lengthwise direction of the swing plate 71 are balanced, which improves the stability of the swing plate 71 during rotation. It also allows the swing plate 71 to fit more tightly with the outer cover 12, allowing the swing plate 71 to seamlessly close the air outlet 140. Placing the swing motor 73 within the mounting chamber 120 not only improves the aesthetics of the air supply structure, but also allows the swing motor 73 to operate in a lower temperature environment, thereby reducing the high-temperature resistance requirements of the swing motor 73 and lowering costs, and further helping to extend the service life of the swing motor 73.

[0119] In some embodiments, for ease of description, the installation chamber 120 housing the wind rotor motor 3 is referred to as the first installation chamber, and the other installation chamber 120 is referred to as the second installation chamber. A wiring channel is formed between the upper cover 11 and the second air outlet wall 122. The swing motor 73 disposed in the second installation chamber is connected to a first wire, which passes through the wiring channel and then into the first installation chamber. The swing motor 73 disposed in the first installation chamber is connected to a second wire, which is introduced into the first installation chamber to facilitate connection of the first and second wires to a power source.

[0120] Specifically, the second air outlet wall 122 includes a plate body 1222, two sealing plates 1223 protruding from the top surface of the plate body 1222, and at least two wiring plates 1224. The two sealing plates 1223 are spaced apart along the width of the outer cover 12, and the two wiring plates 1224 are spaced apart along the length of the outer cover 12. The two sealing plates 1223 are connected by the two wiring plates 1224. Wiring holes 1225 are formed between the wiring plates 1224 and one of the sealing plates 1223. The wiring holes 1225 on the multiple wiring plates 1224 are sequentially connected to form a wiring channel. It should be noted that the width direction of the outer cover 12 is the front-to-back direction.

[0121] In some embodiments, as Figure 9 As shown, the inner wall surface of the upper cover 11 is provided with a third sealing surface 114, and the second air outlet wall 122 abuts against the third sealing surface 114 along the width direction of the outer cover 12 and forms a surface contact seal, so that the wiring channel and the air outlet channel are not connected. Specifically, the side of the sealing plate 1223 located at the rear facing away from the other sealing plate 1223 forms the third sealing surface 114. This arrangement can avoid air leakage at the contact point between the second air outlet wall 122 and the upper cover 11, ensuring the sealing performance of the air supply channel 110; and can separate the wiring channel and the air supply channel 110 to prevent hot air in the air outlet channel from entering the wiring channel, so that the first wire running through the wiring channel is in a lower temperature environment.

[0122] Illustratively, of the two sealing plates 1223 , the positioning protrusion 123 is formed on the upper end of the front sealing plate 1223 .

[0123] In some embodiments, the swing motor 73 is a stepper motor. The rotation angle of the output shaft of the swing motor 73 can be controlled to adjust the opening angle of the swing plate 71 according to actual needs, thereby adjusting the airflow direction. The swing motor 73 can also be controlled to drive the swing plate 71 to swing back and forth to achieve a comfortable airflow effect. The airflow effect can also be adjusted by controlling the speed at which the swing plate 71 swings back and forth.

[0124] Exemplarily, the air sway plate 71 rotates 90° from a position where the air outlet 140 is fully opened to a position where the air outlet 140 is fully closed.

[0125] In some embodiments, as Figure 1As shown, the outer cover 12 further includes a front wall 125 connecting the second air outlet wall 122 and the first air outlet wall 121. The front wall 125 is provided with a receiving groove 1251 with an opening facing forward. The air outlet 140 is arranged through the bottom wall of the receiving groove 1251. The receiving groove 1251 is arranged along the length of the front wall 125. The bottom wall of the receiving groove 1251 is also provided with two avoidance holes 1252. The air outlet 140 is arranged between the two avoidance holes 1252 along the length of the front wall 125. The two avoidance holes 1252 correspond one-to-one to the two rotating rods 72, and the rotating rods 72 pass through the corresponding avoidance holes 1252. Exemplarily, the front wall 125 is located on the front side of the electric water heater.

[0126] When the air swaying plate 71 closes the air outlet 140 , the air swaying plate 71 is received in the receiving groove 1251 and does not protrude from the outer surface of the front wall 125 , thereby improving the aesthetic performance of the air supply structure.

[0127] For example, the sway plate 71 is an arc-shaped structure. To enhance the structural strength of the sway plate 71, a reinforcement strip is provided on the inner wall surface of the sway plate 71. Providing the reinforcement strip on the inner wall surface of the sway plate 71 improves the aesthetic performance of the sway plate 71 and prevents the reinforcement strip from being directly exposed and affecting the aesthetics of the heater.

[0128] In some embodiments, as Figure 3 As shown, the air inlet 130 and the air outlet 140 are located on opposite radial sides of the crossflow impeller 2. In other words, the air inlet 130 and the air outlet 140 are arranged approximately 180 degrees apart. Compared to the prior art arrangement of the air inlet 130 and the air outlet 140 at a 90-degree interval, this arrangement helps reduce the volume of the air supply structure and the space it occupies. For example, the air inlet 130 is closer to the crossflow impeller 2 than the air outlet 140.

[0129] In some embodiments, as Figure 3 and Figure 9 As shown, the upper inner wall of the air supply channel 110 is formed with a first volute tongue guide wall 1103 and a second volute tongue guide wall 1104, both extending along the circumference of the crossflow rotor 2. The first volute tongue guide wall 1103 and the second volute tongue guide wall 1104 are arranged in sequence along the rotation direction of the crossflow rotor 2, with the first volute tongue guide wall 1103 located on the side of the second volute tongue guide wall 1104 closer to the air inlet 130. The first volute tongue guide wall 1103 is an arc surface with a distance R1 from the central axis of the crossflow rotor 2, and the distance between the second volute tongue guide wall 1104 and the central axis of the crossflow rotor 2 is R2, R1 < R2, and R2 gradually increases from the air outlet 140 to the air inlet 130. For example, the first volute tongue guide wall 1103 and the second volute tongue guide wall 1104 are both arranged on the inner wall of the upper cover 11. Figure 3 and Figure 9The direction indicated by W is the rotation direction of the crossflow impeller 2.

[0130] For the convenience of description, the gap between the first volute tongue guide wall 1103 and the crossflow wind wheel 2 is recorded as the first gap 1105, and the gap between the second volute tongue guide wall 1104 and the crossflow wind wheel 2 is recorded as the second gap 1106.

[0131] like Figure 3 and Figure 9 As shown, the crossflow impeller 2 rotates, and the outside air enters through the air inlet 130 under the action of the crossflow impeller 2, and flows to the left from the gap between the crossflow impeller 2 and the lower inner wall of the air supply channel 110. Most of the airflow on the air outlet side of the crossflow impeller 2 flows directly to the air outlet 140, and the remaining small part of the airflow flows to the narrower end of the second gap 1106 under the action of the crossflow impeller 2. Since the gap between the narrower end of the second gap 1106 and the crossflow impeller 2 is small, the second volute tongue guide wall 1104 has a flow-blocking effect; and in the direction from the air outlet 140 to the air inlet 130, R2 gradually increases, and accordingly, the second gap 1106 gradually increases, and part of the airflow on the air outlet side of the crossflow impeller 2 enters the second gap 1106 from the narrower end of the second gap 1106. 06, as the second gap 1106 gradually increases, the airflow pressure gradually decreases, which is beneficial to reducing the noise generated by the friction between the airflow and the inner wall of the second gap 1106. Then the airflow hits the blocking surface formed by the first volute tongue guide wall 1103 and the second volute tongue guide wall 1104, causing the airflow to flow in the opposite direction and decompose and dissipate at the narrower part of the second gap 1106. Since R1 is less than R2 and the first volute tongue guide wall 1103 and the second volute tongue guide wall 1104 at the wider end of the second gap 1106 are connected, the difference between R1 and R2 is relatively large, and the flow resistance at the connection position of the first volute tongue guide wall 1103 and the second volute tongue guide wall 1104 is stronger. The remaining small amount of airflow flows to the air inlet 130 under the action of the first volute tongue guide wall 1103.

[0132] In some embodiments, the extension direction of the first volute tongue guide wall 1103 from one end thereof connected to the second volute tongue guide wall 1104 to the other end is the rotation direction of the cross-flow wind wheel 2; the cross-flow wind wheel 2 includes a plurality of blades 21 arranged in sequence around the circumference of the wind wheel shaft 22, and the two ends of the blades 21 respectively form a proximal end 221 and a distal end 222, and the proximal end 221 is closer to the wind wheel shaft 22 than the distal end 222.

[0133] Of any two adjacent blades 21 distributed along the rotation direction of the crossflow rotor 2, the proximal end 221 of the downstream blade 21 is located between the proximal end 221 of the upstream blade 21 and the distal end 222 of the upstream blade 21. In other words, the proximal ends 221 and the distal ends 222 are alternately distributed along the circumference of the crossflow rotor 2.

[0134] like Figure 3As shown, the crossflow impeller 2 rotates clockwise, and external air enters the gap between the crossflow impeller 2 and the lower inner wall of the air supply channel 110 from the air inlet 130, and then flows to the side of the crossflow impeller 2 close to the air outlet 140.

[0135] In some embodiments, as Figure 9 As shown, the radial clearance d1 between the first volute guide wall 1103 and the maximum outer diameter of the crossflow impeller 2 is d1, d1 ≤ 3 mm. By limiting the radial clearance d1 to 3 mm, the amount of airflow entering the second gap 1106 is reduced, so that most of the airflow in the first gap 1105 is blocked by the blocking surface and flows in the reverse direction, and then gradually decomposes and dissipates.

[0136] It should be noted that d1 can be any one of 3mm, 2.5mm, 2mm, 1.5mm, and 1mm.

[0137] In some embodiments, as Figure 9 As shown, the minimum radial clearance between the second volute tongue guide wall 1104 and the maximum outer diameter of the crossflow rotor 2 is dmin, and the maximum radial clearance between the second volute tongue guide wall 1104 and the maximum outer diameter of the crossflow rotor 2 is dmax. The ratio of dmax to dmin is less than or equal to 1.5. By limiting the ratio of dmax to dmin, the airflow direction can be controlled and the noise generated by friction between the airflow and the inner wall of the second slit 1106 can be reduced.

[0138] It should be noted that the ratio of dmax to dmin can be any value greater than 1 and less than or equal to 1.5. For example, dmax:dmin=13:11.

[0139] In some embodiments, as Figure 9 As shown, the arc length of the first volute tongue guide wall 1103 extending along the circumference of the crossflow wind wheel 2 is L1, and the arc length of the second volute tongue guide wall 1104 extending along the circumference of the crossflow wind wheel 2 is L2, L1>L2, and the ratio of L1 to L2 is less than or equal to 1.2.

[0140] By limiting the ratio of L1 to L2, it is helpful to control the direction of the airflow and reduce noise.

[0141] It should be noted that the ratio of dmax to dmin can be any value greater than 1 and less than or equal to 1.2. For example, dmax:dmin=67:57.

[0142] In some embodiments, as Figure 3 As shown, the air outlet channel includes a first air outlet duct 1101 , and along the air outlet direction of the first air outlet duct 1101 , the cross-sectional area of ​​the first air outlet duct 1101 gradually decreases.

[0143] With such an arrangement, the compressed air flow generated by the crossflow impeller 2 is compressed twice in the process of flowing from the inlet end of the first air outlet duct 1101 to the outlet end of the first air outlet duct 1101, thereby increasing the outlet pressure of the air outlet 140 and increasing the air volume.

[0144] In some embodiments, as Figure 3 As shown, the air outlet channel also includes a second air outlet channel 1102 connected to the first air outlet channel 1101. Along the extension direction of the air outlet channel, the first air outlet channel 1101 is closer to the cross-flow wind wheel 2 than the second air outlet channel 1102. Along the air outlet direction of the second air outlet channel 1102, the cross-sectional area of ​​the second air outlet channel 1102 gradually increases.

[0145] The compressed airflow that is secondary compressed by the first air outlet 1101 enters the second air outlet 1102 and radiates to a larger area, which is beneficial to disperse the airflow and increase the air outlet area; and the second air outlet 1102 also has the function of guiding the airflow.

[0146] Illustratively, the air outlet channel formed by the connection between the first air outlet channel 1101 and the second air outlet channel 1102 is a trumpet-shaped channel with large openings at both ends and a narrow middle.

[0147] In some embodiments, as Figure 9 As shown, an outlet guide wall 1109 is provided on the lower inner wall of the air supply channel 110 at a position corresponding to the crossflow rotor 2. The radial spacing between the outlet guide wall 1109 and the crossflow rotor 2 gradually increases from the direction of the crossflow rotor 2 toward the air outlet 140. The airflow generated by the rotation of the crossflow rotor 2 flows toward the side of the air outlet 140 under the guidance of the outlet guide wall 1109. Since the radial spacing between the outlet guide wall 1109 and the crossflow rotor 2 gradually increases from the direction of the crossflow rotor 2 toward the air outlet 140, the outlet guide wall 1109 can guide most of the airflow to the air outlet 140, thereby obtaining a larger air output. This also reduces the amount of airflow directed by the crossflow rotor 2 to the second volute tongue guide wall 1104, which helps reduce noise.

[0148] It should be noted that the radial spacing between the outlet guide wall 1109 and the crossflow impeller 2 refers to the radial spacing between the maximum circumscribed circle of the crossflow impeller 2 and the outlet guide wall 1109. The lower inner wall of the air supply duct 110 has a throat, which is the point where the radial spacing between the lower inner wall of the air supply duct 110 and the crossflow impeller 2 is closest. From the air inlet 130 to the air outlet 140, the outlet guide wall 1109 is located downstream of the throat, and the end of the outlet guide wall 1109 closest to the crossflow impeller 2 is connected to the throat.

[0149] In some embodiments, as Figure 9As shown, an air inlet guide wall 1108 is provided on the lower inner wall of the air supply channel 110 at a position corresponding to the cross-flow wind wheel 2. From the air inlet 130 to the cross-flow wind wheel 2, the radial spacing between the air inlet guide wall 1108 and the cross-flow wind wheel 2 gradually decreases, so that as much air as possible can enter the gap between the cross-flow wind wheel 2 and the lower inner wall of the air supply channel 110.

[0150] It should be noted that the radial spacing between the air inlet guide wall 1108 and the crossflow impeller 2 refers to the radial spacing between the maximum circumscribed circle of the crossflow impeller 2 and the crossflow impeller 2. In the direction from the air inlet 130 to the air outlet 140, the air inlet guide wall 1108 is located upstream of the snail throat, and the end of the air inlet guide wall 1108 closest to the crossflow impeller 2 is connected to the snail throat.

[0151] In some embodiments, as Figure 3 As shown, the air inlet 130 is provided with an air inlet grille 8, and the outlet of the air inlet grille 8 is higher than the inlet of the air inlet grille 8. Such arrangement can prevent external bathing spray water from entering the interior of the air supply channel 110.

[0152] like Figure 14 As shown, simulation of the air supply structure shows that the noise of the air outlet 140 is less than 60 decibels, which is relatively low.

[0153] Illustratively, the air inlet grille 8 is integrally formed with the outer cover 12 , which simplifies the processing of the outer cover 12 and the air inlet grille 8 and reduces costs.

[0154] In some embodiments, as Figure 13 and Figure 15 As shown, the electric water heater further includes a water heater housing 91 , and the air supply structure is installed at the bottom of the water heater housing 91 .

[0155] Specifically, the inner wall surface of the upper cover 11 is provided with an annular groove 115 extending along its circumference, and the water heater shell 91 is provided with an annular rib, which is inserted upward into the annular groove 115 to connect the upper cover 11 to the water heater shell 91.

[0156] In some embodiments, as Figure 13 and Figure 15 As shown, the bottom of the inner tank 92 is connected to a drain pipe 93, and a perforation is provided on the upper cover 11. The lower end of the drain pipe 93 passes through the perforation and extends into the air supply channel 110 and is connected to a detachable first drain cover 18. A drain hole is provided on the outer cover 12, and the drain hole is connected to a detachable second drain cover 94. The first projection of the perforation in the horizontal plane is completely located within the second projection of the drain hole in the horizontal plane, and the first projection and the second projection are arranged at intervals.

[0157] When draining the electric water heater, the second drain cover 94 is removed, followed by the first drain cover 18. Dirt in the inner tank 92 is discharged sequentially through the drain pipe 93 and the drain hole. Since the first projection and the second projection are spaced apart, dirt discharged through the drain pipe 93 can pass smoothly through the drain hole and is less likely to splash into the air supply duct 110.

[0158] For example, the first drain cover 18 and the drain pipe 93 are threadedly connected, and the second drain cover 94 and the outer cover 12 are fastened together, so that assembly and disassembly are convenient and quick.

[0159] It should be noted that, in the embodiment of the present invention, the inner wall of the upper cover 11 refers to the wall surface of the upper cover 11 facing downward.

[0160] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0161] The specific contents of the above-mentioned specific embodiments only express several embodiments of the present invention. Although the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the appended claims.

Claims

1. Air supply structure, characterized in that: include: An air supply housing (1), wherein the inner bottom wall of the air supply housing (1) is provided with a first support structure (14) and a second support structure (15) axially spaced apart from each other, the first support structure (14) being connected to a motor cover plate (17) located above the first support structure (14), and the second support structure (15) being connected to a wind wheel cover plate (16) located above the second support structure (15); A crossflow wind wheel (2), one end of the crossflow wind wheel (2) being connected to a rotating member (6), the rotating member (6) being sandwiched between the wind wheel cover plate (16) and the second supporting structure (15) along both the radial direction and the axial direction of the crossflow wind wheel (2); A wind wheel motor (3) is coaxially arranged with the crossflow wind wheel (2), and an output shaft of the wind wheel motor (3) is connected to the other end of the crossflow wind wheel (2) to drive the crossflow wind wheel (2) to rotate; the wind wheel motor (3) is sandwiched between the motor cover plate (17) and the first supporting structure (14) along the radial direction and the axial direction of the crossflow wind wheel (2).

2. The air supply structure according to claim 1, characterized in that: The air supply housing (1) has an air supply channel (110), and an air inlet (130) and an air outlet (140) are respectively formed at both ends of the air supply channel (110); a first volute tongue guide wall (1103) and a second volute tongue guide wall (1104) are formed on the upper inner wall of the air supply channel (110), both of which extend along the circumference of the cross-flow impeller (2), and the first volute tongue guide wall (1103) is located on a side of the second volute tongue guide wall (1104) close to the air inlet (130); The first volute tongue guide wall (1103) is an arc surface with a distance R1 from the central axis of the cross-flow wind wheel (2); the distance between the second volute tongue guide wall (1104) and the central axis of the cross-flow wind wheel (2) is R2, R1<R2, and R2 gradually increases from the air outlet (140) to the air inlet (130).

3. The air supply structure according to claim 2, characterized in that: The extending direction of the first volute tongue guide wall (1103) from one end thereof connected to the second volute tongue guide wall (1104) to the other end is the rotation direction of the crossflow impeller (2); The crossflow wind wheel (2) comprises a wind wheel shaft (22), and a plurality of blades (21) sequentially arranged in a circumferential direction around the wind wheel shaft (22), wherein two ends of the blades (21) respectively form a proximal end (221) and a distal end (222), and the proximal end (221) is closer to the wind wheel shaft (22) than the distal end (222); In any two adjacent blades (21) distributed along the rotation direction of the crossflow impeller (2), the proximal end (221) of the downstream blade (21) is located between the proximal end (221) of the upstream blade (21) and the distal end (222) of the upstream blade (21).

4. The air supply structure according to claim 2, characterized in that: The minimum radial clearance between the second volute tongue guide wall (1104) and the maximum outer diameter of the crossflow wind wheel (2) is dmin, and the maximum radial clearance between the second volute tongue guide wall (1104) and the maximum outer diameter of the crossflow wind wheel (2) is dmax; and the ratio of dmax to dmin is less than or equal to 1.

5.

5. The air supply structure according to claim 2, characterized in that: A heating component (4) is provided in the air supply channel (110), and in the direction from the air inlet (130) to the air outlet (140), the heating component (4) is located downstream of the cross-flow fan wheel (2), and the air supply channel (110) located upstream of the cross-flow fan wheel (2) forms an air inlet channel (1107), and the air supply channel (110) located downstream of the cross-flow fan wheel (2) forms an air outlet channel; Two heat insulation plates (13) are provided in the air supply housing (1) and are spaced apart along the axial direction of the crossflow impeller (2); the two heat insulation plates (13) divide the inner cavity of the air supply housing (1) into two installation chambers (120) both directly connected to the outside atmosphere, and the air supply channel (110) located between the two installation chambers (120); the two installation chambers (120) are both connected to the air inlet channel (1107); The first supporting structure (14) is arranged in one of the installation chambers (120), and the second supporting structure (15) is arranged in the other installation chamber (120).

6. The air supply structure according to claim 5, characterized in that: A waterproof sleeve (126) is provided in the air supply channel (110), the waterproof sleeve (126) is located between the heating component (4) and the air inlet (130), and the waterproof sleeve (126) passes through the air supply housing (1), and the waterproof sleeve (126) is used for a pipeline to pass through.

7. The air supply structure according to claim 5, characterized in that: The air supply structure further comprises a sterilization component (5), the mounting end of the sterilization component (5) being arranged in the mounting chamber (120) and being mounted on the heat insulation board (13) forming the mounting chamber (120), the working end of the sterilization component (5) passing through the heat insulation board (13) and then being placed in the air supply channel (110), and the sterilization component (5) being used to sterilize the airflow flowing in the air supply channel (110).

8. The air supply structure according to claim 5, characterized in that: The air supply housing (1) comprises a first air outlet wall (121) and a second air outlet wall (122) which are arranged opposite to each other and are used to enclose the air outlet (140); One end of the heating component (4) is snap-connected to the second air outlet wall (122), and the other end of the heating component (4) is connected to the first air outlet wall (121) via a fastener.

9. The air supply structure according to claim 8, characterized in that: The heating component (4) comprises: A heating grille (41), the heating grille (41) having a mounting slot (414), the outlet direction of the mounting slot (414) facing away from the air outlet direction of the air outlet (140); a heating unit (42), the heating unit (42) being located in the mounting slot (414) and mounted on the heating grid (41); A thermostat (43) is installed on the heating grille (41) with one end extending into the installation chamber (120), and the other end is inserted into the heating grille (41) and electrically connected to the heating unit (42). The thermostat (43) is used to control the start and stop of the heating unit (42).

10. Electric water heater, characterized in that It comprises a water heater shell (91), and an air supply structure according to any one of claims 1 to 9, wherein the air supply structure is installed at the bottom of the water heater shell (91).

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