Electric heater

Abstract

The present invention provides an electric heater. The electric heater comprises: a housing having an air inlet and an air outlet; an air duct arranged in the housing, the air inlet being connected to the air outlet through the air duct, the air duct comprising a first air duct section and a second air duct section being connected to each other; a fan rotatably arranged in the first air duct section; a heating device, the heating device being arranged at the air duct outlet of the second air duct section or located in the second air duct section, for heating the gas entering the second air duct section; wherein the first air duct section has a first liquid drain portion, the first liquid drain portion being located below the fan, for discharging condensed water gathered in the first air duct section to the outside of the air duct. The present invention effectively solves the problem in the prior art that water vapor is easily condensed and gathered on the inner wall of the air duct, thus affecting the normal operation of the fan.

Description

Technical Field

[0001] The present invention relates to the technical field of household electrical appliances, and in particular to an electric heater. Background Art

[0002] At present, the heating principle of the skirting board electric heater with a wind wheel is: the wind wheel draws in external air, the heating element heats the inhaled air, and the hot air formed after heating is blown out from the exhaust port, thereby achieving a faster and more efficient heating effect than ordinary skirting boards.

[0003] However, if a skirting board electric heater with a fan impeller is used in a bathroom or other high-humidity place, the rotation of the fan impeller will bring in water vapor. Some of the water vapor will condense on the inner wall of the air duct due to the temperature difference and may even accumulate, thus affecting the normal operation of the motor. Summary of the invention

[0004] The main purpose of the present invention is to provide an electric heater to solve the problem in the prior art that water vapor is easily condensed and gathered on the inner wall of the air duct, thereby affecting the normal operation of the fan.

[0005] In order to achieve the above-mentioned objectives, the present invention provides an electric heater, comprising: a shell having an air inlet and an air outlet; an air duct arranged in the shell, the air inlet being connected to the air outlet through the air duct, the air duct comprising a first air duct section and a second air duct section which are connected to each other; a fan rotatably arranged in the first air duct section; a heating device, the heating device being arranged at the air duct outlet of the second air duct section or located in the second air duct section, so as to heat the gas entering the second air duct section; wherein the first air duct section has a first drainage portion, the first drainage portion being located below the fan, so as to discharge condensed water gathered in the first air duct section to the outside of the air duct.

[0006] Furthermore, along the height direction of the electric heater, there is a first distance between the pivot axis of the fan and the first drainage portion, and a second distance between the pivot axis and the remaining position of the first air duct section located therebelow, and the first distance is greater than the second distance.

[0007] Further, the first liquid drainage portion is a through hole or an opening, and an extension direction of the first liquid drainage portion is consistent with the pivot axis of the fan.

[0008] Furthermore, the electric heater also includes: a liquid storage structure, which is arranged in the shell and around the heating device, and the liquid storage structure has a second liquid discharge portion. The liquid discharged from the second liquid discharge portion is heated by the heating device to form water vapor and is discharged from the air outlet.

[0009] Furthermore, the liquid storage structure has a first liquid inlet, and the electric heater also includes: a first pipeline, and a first liquid discharge part is connected to the first liquid inlet through the first pipeline; wherein, along the height direction of the electric heater, the first liquid discharge part is located above the first liquid inlet.

[0010] Furthermore, the first liquid inlet is a waist-shaped hole, the first end of the first pipeline is connected to the first liquid discharge portion, and the second end of the first pipeline is connected to the first liquid inlet. Along the direction from the first end to the second end of the first pipeline, the liquid cross-section of the first pipeline gradually decreases.

[0011] Furthermore, the second drainage portion includes a plurality of drainage holes, and the electric heater further includes: a shielding structure, which is movably disposed at the second drainage portion to shield or avoid the plurality of drainage holes.

[0012] Furthermore, the liquid storage structure includes: a liquid storage body, which is arc-shaped, and the first liquid inlet and the second liquid discharge portion are both arranged on the liquid storage body; a connecting structure, the liquid storage body is arranged on the connecting structure, and the liquid storage body is connected to the heating device and / or the shell through the connecting structure.

[0013] Furthermore, the liquid storage body includes: two first curved plates arranged opposite to each other; two strip plates arranged opposite to each other; two second curved plates arranged opposite to each other, the two first curved plates, the two strip plates and the two second curved plates surround and form the liquid storage body, the second liquid discharge portion is arranged on a strip plate located below, and the first liquid inlet is arranged on a second curved plate.

[0014] Furthermore, the liquid storage structure also has a second liquid inlet, which is arranged on another second arc plate, the shell has a water inlet, and the electric heater also includes: a second pipeline, the water inlet is connected to the second liquid inlet through the second pipeline; wherein, along the height direction of the electric heater, the water inlet is located above the second liquid inlet.

[0015] Furthermore, the connection structure includes: an arc-shaped connection plate, the liquid storage body is arranged on the arc-shaped connection plate; a flange structure is arranged on the outer peripheral surface of the arc-shaped connection plate; wherein, there are multiple flange structures, and the multiple flange structures are arranged at intervals along the outer peripheral surface of the arc-shaped connection plate.

[0016] Furthermore, the electric heater has a heating mode and a humidification mode. When the shielding structure shields the second liquid drain portion, the electric heater is in the heating mode; when the shielding structure avoids the second liquid drain portion, the electric heater is in the humidification mode.

[0017] According to the technical solution of the present invention, the air duct includes a first air duct section and a second air duct section which are interconnected, the fan is rotatably arranged in the first air duct section, and the heating device is arranged at the air duct outlet of the second air duct section or in the second air duct section. The first air duct section has a first drain portion, which is located below the fan and is used to discharge the condensed water gathered in the first air duct section to the outside of the air duct. In this way, when the user places the electric heater in a bathroom or a high humidity environment for use, the fan draws water vapor into the first air duct section and the second air duct section through the air inlet, and the heating device heats the gas entering the second air duct section. Due to the temperature difference between the first air duct section and the second air duct section, the water vapor entering the first air duct section condenses or even gathers on the inner surface of the first air duct section, and the gathered condensed water can be discharged to the outside of the air duct through the first drain portion, thereby avoiding the accumulation of condensed water on the inner surface of the first air duct section, solving the problem in the prior art that water vapor is easy to condense and gather on the inner wall of the air duct, thereby affecting the normal operation of the fan, and improving the operating reliability of the electric heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of an electric heater according to the present invention is shown;

[0020] Figure 2 Shows Figure 1 A schematic diagram of the three-dimensional structure of the electric heater after the front shell is removed;

[0021] Figure 3 Shows Figure 2 The enlarged schematic diagram of the electric heater at point A;

[0022] Figure 4 Shows Figure 1 A schematic diagram of the three-dimensional structure of the electric heater when the rear shell is removed and the shielding structure is in an avoidance state;

[0023] Figure 5 Shows Figure 1 A schematic diagram of the three-dimensional structure of the electric heater when the rear shell is removed and the shielding structure is in a shielding state;

[0024] Figure 6 Shows Figure 4 A schematic diagram of a three-dimensional structure of a liquid storage structure of the electric heater at a first angle; and

[0025] Figure 7 Shows Figure 6 A schematic diagram of the three-dimensional structure of the liquid storage structure at a second angle.

[0026] The above drawings include the following reference numerals:

[0027] 10. Shell; 11. Air inlet; 12. Water inlet; 20. Air duct; 21. First air duct section; 211. First liquid discharge section; 22. Second air duct section; 30. Fan; 40. Heating device; 50. Liquid storage structure; 51. Second liquid discharge section; 52. First liquid inlet; 53. Liquid storage body; 531. First arc plate; 532. Strip plate; 533. Second arc plate; 54. Connecting structure; 541. Arc connecting plate; 542. Flanging structure; 55. Second liquid inlet; 60. First pipeline; 70. Shielding structure; 80. Second pipeline; 90. Support foot. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0030] In the present invention, unless otherwise specified, the directional words used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0031] In order to solve the problem in the prior art that water vapor is easily condensed and gathered on the inner wall of the air duct, thereby affecting the normal operation of the fan, the present application provides an electric heater.

[0032] like Figures 1 to 7 As shown, the electric heater includes a housing 10, an air duct 20, a fan 30 and a heating device 40. The housing 10 has an air inlet 11 and an air outlet. The air duct 20 is arranged in the housing 10, and the air inlet 11 is connected to the air outlet through the air duct 20. The air duct 20 includes a first air duct section 21 and a second air duct section 22 that are connected to each other. The fan 30 is rotatably arranged in the first air duct section 21. The heating device 40 is arranged at the air duct outlet of the second air duct section 22 or in the second air duct section 22, so as to heat the gas entering the second air duct section 22. Among them, the first air duct section 21 has a first liquid drain portion 211, and the first liquid drain portion 211 is located below the fan 30, so as to discharge the condensed water gathered in the first air duct section 21 to the outside of the air duct 20.

[0033] Using the technical solution of this embodiment, the air duct 20 includes a first air duct section 21 and a second air duct section 22 that are interconnected, the fan 30 is rotatably disposed in the first air duct section 21, and the heating device 40 is disposed at the air duct outlet of the second air duct section 22 or in the second air duct section 22. The first air duct section 21 has a first drain portion 211, which is located below the fan 30 and is used to discharge the condensed water gathered in the first air duct section 21 to the outside of the air duct 20. In this way, when the user places the electric heater in a bathroom or a high humidity environment for use, the fan 30 draws water vapor into the first air duct section 21 and the second air duct section 22 through the air inlet 11, and the heating device 40 heats the gas entering the second air duct section 22. Due to the temperature difference between the first air duct section 21 and the second air duct section 22, the water vapor entering the first air duct section 21 condenses or even gathers on the inner surface of the first air duct section 21, and the gathered condensed water can be discharged to the outside of the air duct 20 through the first drain portion 211, thereby avoiding the accumulation of condensed water on the inner surface of the first air duct section 21, thereby solving the problem in the prior art that water vapor is easily condensed and gathered on the inner wall of the air duct, thereby affecting the normal operation of the fan, thereby improving the operating reliability of the electric heater.

[0034] In this embodiment, the collected condensed water is discharged to the outside of the air duct 20 through the first drain portion 211, thereby preventing the accumulation of condensed water to cause bacterial growth and produce odors that affect the user experience.

[0035] In this embodiment, along the height direction of the electric heater, there is a first distance between the pivot axis of the fan 30 and the first drain portion 211, and there is a second distance between the pivot axis and the remaining position of the first air duct section 21 located below it, and the first distance is greater than the second distance. In this way, the above arrangement enables the first drain portion 211 to be located at the lowest position of the first air duct section 21, and the condensed water condensed on the inner surface of the first air duct section 21 can slide along the inner surface of the first air duct section 21 to the first drain portion 211 under its own weight, and be discharged to the outside of the air duct 20 through the first drain portion 211, thereby preventing the condensed water from gathering in the air duct 20 and affecting the normal operation of the fan 30.

[0036] Optionally, the first drain portion 211 is a through hole or an opening, and the extension direction of the first drain portion 211 is consistent with the pivot axis of the fan 30. In this way, the above arrangement makes the structure of the first drain portion 211 simpler, easier to process and realize, and reduces the processing cost of the first drain portion 211; on the other hand, it improves the drainage efficiency of the first drain portion 211, so as to ensure that the condensed water condensed on the inner surface of the first air duct section 21 is discharged to the outside of the air duct 20 through the first drain portion 211.

[0037] like Figure 2 and Figures 4 to 7As shown, the electric heater further includes a liquid storage structure 50. The liquid storage structure 50 is disposed in the housing 10 and around the heating device 40. The liquid storage structure 50 has a second liquid discharge portion 51. The liquid discharged from the second liquid discharge portion 51 is heated by the heating device 40 to form water vapor to be discharged from the air outlet. In this way, the above arrangement enables the electric heater to realize the humidification function, so that the electric heater has both heating and humidification functions, thereby expanding the use range of the electric heater to meet different user needs and working conditions.

[0038] Specifically, the second liquid drain portion 51 is connected to the air outlet, and the water stored in the liquid storage structure 50 can flow out from the second liquid drain portion 51 and then evaporated by the high temperature of the heating device 40, thereby realizing the humidification function of the electric heater.

[0039] like Figures 2 to 6 As shown, the liquid storage structure 50 has a first liquid inlet 52, and the electric heater also includes a first pipeline 60. The first liquid discharge portion 211 is connected to the first liquid inlet 52 through the first pipeline 60. Among them, along the height direction of the electric heater, the first liquid discharge portion 211 is located above the first liquid inlet 52. In this way, the liquid storage structure 50 can collect and recycle the condensed water discharged from the first liquid discharge portion 211 to avoid the waste of condensed water. At the same time, the above arrangement enables the condensed water entering the first liquid discharge portion 211 to enter the first pipeline 60 under its own weight, without the need to use a pump body structure to pump the condensed water.

[0040] Specifically, the condensed water discharged from the first liquid drain portion 211 enters the first pipeline 60, flows into the first liquid inlet 52 through the first pipeline 60, and mixes with the water stored in the liquid storage structure 50. When the electric heater needs to be humidified, the mixed liquid flows out from the second liquid drain portion 51, and then evaporates at high temperature by the heating device 40, thereby realizing the humidification function of the electric heater. In this way, the condensed water discharged from the first liquid drain portion 211 first enters the liquid storage structure 50, and then is discharged to the outside of the electric heater after evaporation by the heating device 40, thereby preventing the condensed water from entering other areas of the housing 10 and causing a short circuit or even affecting the normal use of the electric heater.

[0041] Optionally, the first liquid inlet 52 is a waist-shaped hole, the first end of the first pipeline 60 is connected to the first liquid drain 211, and the second end of the first pipeline 60 is connected to the first liquid inlet 52, and the liquid flow cross section of the first pipeline 60 gradually decreases in the direction from the first end to the second end of the first pipeline 60. In this way, since the liquid flow cross section at a position near the first liquid inlet 52 in the first pipeline 60 is small, the pressure there is relatively large. When the condensed water flows in the first pipeline 60, the above-mentioned arrangement of the first pipeline 60 enables the condensed water to flow quickly in the first pipeline 60, thereby preventing the condensed water from accumulating in the first pipeline 60 and affecting the normal drainage of the first liquid drain 211.

[0042] like Figure 5 As shown, the second liquid discharge portion 51 includes a plurality of liquid discharge holes, and the electric heater further includes a shielding structure 70. The shielding structure 70 can be movably disposed at the second liquid discharge portion 51 to shield or avoid the plurality of liquid discharge holes. In this way, the user can switch the operation mode of the electric heater by controlling the shielding structure 70, thereby reducing the user's operating difficulty and improving the user's experience.

[0043] Specifically, when the electric heater is required to humidify, the shielding structure 70 is operated so that the shielding structure 70 avoids the plurality of drainage holes. At this time, the water stored in the liquid storage structure 50 can be discharged through the second drainage portion 51, and then evaporated by the high temperature of the heating device 40, thereby realizing the humidification function of the electric heater. When the electric heater is not required to humidify, the shielding structure 70 is operated so that the shielding structure 70 moves from the avoidance state to the shielding state. At this time, the water stored in the liquid storage structure 50 cannot be discharged through the second drainage portion 51, and the electric heater is in the heating mode.

[0044] In this embodiment, there is one shielding structure 70 , and one shielding structure 70 shields or avoids all the drainage holes.

[0045] It should be noted that the number of shielding structures 70 is not limited thereto, and can be adjusted according to working conditions and usage requirements. Optionally, there are two, three, four, or more shielding structures 70.

[0046] In the present embodiment, the shielding structure 70 is a strip-shaped plate, so that the structure of the shielding structure 70 is simpler, easier to process and realize, and the processing cost of the shielding structure 70 is reduced.

[0047] In this embodiment, the electric heater further comprises a driving device, which is drivingly connected to the shielding structure 70 to drive the shielding structure 70 to switch between the shielding state and the avoidance state. Optionally, the driving device is a motor.

[0048] like Figure 6 and Figure 7As shown, the liquid storage structure 50 includes a liquid storage body 53 and a connecting structure 54. Among them, the liquid storage body 53 is arc-shaped, and the first liquid inlet 52 and the second liquid discharge part 51 are both arranged on the liquid storage body 53. The liquid storage body 53 is arranged on the connecting structure 54, and the liquid storage body 53 is connected to the heating device 40 and / or the shell 10 through the connecting structure 54. In this way, the liquid storage body 53 arranged in an arc shape can increase the relative area between it and the heating device 40, thereby increasing the heating area of ​​the liquid storage body 53 to ensure that the water discharged from the second liquid discharge part 51 can be fully evaporated by the heating device 40. At the same time, the above-mentioned arrangement makes it easier and simpler to disassemble and assemble the liquid storage structure 50 and the heating device 40 and / or the shell 10, reduces the difficulty of disassembly and assembly, and also makes the assembly of the liquid storage structure 50 and other structures in the electric heater (such as the heating device 40, the shell 10) more flexible to meet different usage requirements and working conditions.

[0049] like Figure 6 and Figure 7 As shown, the liquid storage body 53 includes two first curved plates 531 arranged opposite to each other, two strip plates 532 arranged opposite to each other, and two second curved plates 533 arranged opposite to each other. The two first curved plates 531, the two strip plates 532, and the two second curved plates 533 surround and form the liquid storage body 53. The second liquid discharge portion 51 is arranged on a strip plate 532 located below, and the first liquid inlet 52 is arranged on a second curved plate 533. Specifically, the first curved plate 531 is arranged around the heating device 40, and the strip plate 532 extends along the length direction of the liquid storage body 53, so that the liquid storage body 53 has an arc-shaped liquid storage cavity.

[0050] like Figure 7 As shown, the liquid storage structure 50 also has a second liquid inlet 55, and the second liquid inlet 55 is arranged on another second arc-shaped plate 533. The shell 10 has a water inlet 12, and the electric heater also includes a second pipeline 80. The water inlet 12 is connected to the second liquid inlet 55 through the second pipeline 80. Among them, along the height direction of the electric heater, the water inlet 12 is located above the second liquid inlet 55. In this way, the user can supply liquid to the liquid storage structure 50 through the water inlet 12 to ensure that the liquid can be stored in the liquid storage structure 50 to achieve the humidification function of the electric heater. At the same time, the above-mentioned height relationship between the water inlet 12 and the second liquid inlet 55 enables the liquid entering the second pipeline 80 to flow into the second liquid inlet 55 under its own weight, without the need to use a power device to transport the liquid.

[0051] Specifically, both ends of the second pipeline 80 are connected to the water inlet 12 and the second liquid inlet 55 respectively, so that the liquid entering the water inlet 12 can enter the arc-shaped liquid storage cavity through the second pipeline 80 and the second liquid inlet 55, thereby supplying liquid to the liquid storage structure 50.

[0052] like Figure 6 and Figure 7 As shown, the connection structure 54 includes an arc-shaped connection plate 541 and a flange structure 542. The liquid storage body 53 is arranged on the arc-shaped connection plate 541. The flange structure 542 is arranged on the outer peripheral surface of the arc-shaped connection plate 541. There are multiple flange structures 542, and the multiple flange structures 542 are arranged at intervals along the outer peripheral surface of the arc-shaped connection plate 541. In this way, the above arrangement makes the structure of the connection structure 54 simpler, easier to process and realize, and also enables the liquid storage body 53 to be supported in the housing 10 through the flange structure 542.

[0053] In this embodiment, the upper end of the connection structure 54 is fixed to the air duct 20 via a fastener, and the lower end of the connection structure 54 is supported in the housing 10 .

[0054] In this embodiment, the electric heater has a heating mode and a humidification mode. When the shielding structure 70 shields the second liquid drain portion 51, the electric heater is in the heating mode; when the shielding structure 70 avoids the second liquid drain portion 51, the electric heater is in the humidification mode. In this way, the above configuration enables the electric heater to have two operating modes to meet different usage requirements of users.

[0055] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the electric heater further includes a support leg 90 , and the support leg 90 is used to support the housing 10 .

[0056] In this embodiment, the housing 10 includes a front housing and a rear housing, the front housing is arranged opposite to the rear housing, the air inlet 11 is arranged on the front housing, and the air outlet is arranged on the rear housing. It should be noted that the arrangement positions of the air inlet 11 and the air outlet are not limited thereto and can be adjusted according to working conditions and usage requirements. Optionally, the air outlet is arranged on the rear housing and / or the front housing.

[0057] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0058] The air duct includes a first air duct section and a second air duct section that are interconnected, the fan is rotatably arranged in the first air duct section, and the heating device is arranged at the air duct outlet of the second air duct section or in the second air duct section. The first air duct section has a first drain portion, which is located below the fan and is used to discharge the condensed water gathered in the first air duct section to the outside of the air duct. In this way, when the user places the electric heater in a bathroom or a high humidity environment for use, the fan draws water vapor into the first air duct section and the second air duct section through the air inlet, and the heating device heats the gas entering the second air duct section. Due to the temperature difference between the first air duct section and the second air duct section, the water vapor entering the first air duct section condenses or even gathers on the inner surface of the first air duct section, and the gathered condensed water can be discharged to the outside of the air duct through the first drain portion, thereby avoiding the accumulation of condensed water on the inner surface of the first air duct section, solving the problem in the prior art that water vapor is easy to condense and gather on the inner wall of the air duct to affect the normal operation of the fan, and improving the operating reliability of the electric heater.

[0059] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0060] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0061] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric heater, It is characterized in that include: A housing (10) having an air inlet (11) and an air outlet; an air duct (20) disposed in the housing (10), the air inlet (11) being in communication with the air outlet via the air duct (20), the air duct (20) comprising a first air duct section (21) and a second air duct section (22) which are in communication with each other; a fan (30) rotatably disposed in the first air duct section (21); a heating device (40), the heating device (40) being arranged at the air duct outlet of the second air duct section (22) or located in the second air duct section (22) to heat the gas entering the second air duct section (22); The first air duct section (21) has a first liquid drain portion (211), and the first liquid drain portion (211) is located below the fan (30) and is used to drain condensed water collected in the first air duct section (21) to the outside of the air duct (20); Along the height direction of the electric heater, there is a first distance between the pivot axis of the fan (30) and the first liquid drain portion (211), and there is a second distance between the pivot axis and the remaining position of the first air duct section (21) located below the pivot axis, and the first distance is greater than the second distance; a liquid storage structure (50) disposed in the housing (10) and surrounding the heating device (40), the liquid storage structure (50) having a second liquid discharge portion (51), the liquid discharged from the second liquid discharge portion (51) being heated by the heating device (40) to form water vapor, and then discharged from the air outlet; The liquid storage structure (50) has a first liquid inlet (52); the electric heater further comprises: a first pipeline (60); The first liquid inlet (52) is a waist-shaped hole, the first end of the first pipeline (60) is in communication with the first liquid discharge portion (211), the second end of the first pipeline (60) is in communication with the first liquid inlet (52), and the liquid-passing cross-section of the first pipeline (60) gradually decreases in the direction from the first end to the second end of the first pipeline (60); The second liquid drain portion (51) comprises a plurality of liquid drain holes, and the electric heater further comprises: A shielding structure (70), wherein the shielding structure (70) is movably arranged at the second liquid drainage portion (51) to shield or avoid the plurality of liquid drainage holes.

2. The electric heater according to claim 1, It is characterized in that The first liquid drainage portion (211) is a through hole or an opening, and the extension direction of the first liquid drainage portion (211) is consistent with the pivot axis of the fan (30).

3. The electric heater according to claim 1, It is characterized in that Along the height direction of the electric heater, the first liquid drain portion (211) is located above the first liquid inlet (52).

4. The electric heater according to claim 1, It is characterized in that The liquid storage structure (50) comprises: a liquid storage body (53), the liquid storage body (53) being arc-shaped, the first liquid inlet (52) and the second liquid discharge portion (51) both being arranged on the liquid storage body (53); A connecting structure (54), the liquid storage body (53) being arranged on the connecting structure (54), and the liquid storage body (53) being connected to the heating device (40) and / or the housing (10) via the connecting structure (54).

5. The electric heater according to claim 4, It is characterized in that The liquid storage body (53) comprises: Two first arc-shaped plates (531) arranged opposite to each other; Two strip plates (532) arranged opposite to each other; Two second arc-shaped plates (533) arranged opposite to each other, two first arc-shaped plates (531), two strip plates (532) and two second arc-shaped plates (533) surround and form the liquid storage body (53); the second liquid discharge portion (51) is arranged on one of the strip plates (532) located below; and the first liquid inlet (52) is arranged on one of the second arc-shaped plates (533).

6. The electric heater according to claim 5, It is characterized in that The liquid storage structure (50) further comprises a second liquid inlet (55), the second liquid inlet (55) being arranged on another second arc-shaped plate (533), the housing (10) comprising a water inlet (12), and the electric heater further comprising: a second pipeline (80), wherein the water inlet (12) is in communication with the second liquid inlet (55) via the second pipeline (80); Wherein, along the height direction of the electric heater, the water inlet (12) is located above the second liquid inlet (55).

7. The electric heater according to claim 4, It is characterized in that The connection structure (54) comprises: An arc-shaped connecting plate (541), the liquid storage body (53) being arranged on the arc-shaped connecting plate (541); The flange structure (542) is arranged on the outer peripheral surface of the arc-shaped connecting plate (541); wherein there are a plurality of the flange structures (542), and the plurality of flange structures (542) are arranged at intervals along the outer peripheral surface of the arc-shaped connecting plate (541).

8. The electric heater according to claim 1, It is characterized in that The electric heater has a heating mode and a humidification mode. When the shielding structure (70) shields the second liquid drain portion (51), the electric heater is in the heating mode; when the shielding structure (70) avoids the second liquid drain portion (51), the electric heater is in the humidification mode.

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