Electric heater

Abstract

The present invention relates to an electric heater, comprising: a shell, wherein the shell has an air duct, and the shell is provided with an air port connecting the outside world with the air duct; a heating element, which is installed in the air duct, and the heating element is used for radiative heat transfer and convective heat transfer between the air port and the outside world; and a driving member, which is used for driving the heating element to rotate in the air duct to disturb the flow field in the air duct. In the above electric heater, since the driving member can drive the heating element to rotate in the air duct to disturb the flow field in the air duct, the heating element is equivalent to a rotating blade, which can enhance the convection effect between the gas in the air duct and the outside gas. Compared with the prior art, the convection effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of heating equipment, in particular to an electric heater. Background Art

[0002] In order to improve the environment and reduce environmental pollution caused by coal-fired heating, more and more cities are vigorously promoting the "coal to electricity" project and encouraging the use of electric heating technology for heating.

[0003] Electric heaters generally rely on natural convection heat transfer and radiation heat transfer. Natural convection heat transfer uses the density difference between cold and hot air as power to drive indoor air circulation, thereby regulating the indoor temperature. The heat from radiation heat transfer is easily absorbed by the human body and the clothes worn by the human body, which has a good heating effect on the human body and is highly efficient and energy-saving.

[0004] Traditional electric heaters that can transfer heat by both convection and radiation have slower airflow diffusion outward, resulting in a weaker convection effect. Summary of the invention

[0005] Based on this, it is necessary to provide an electric heater with better convection effect to address the problem of weak convection effect of traditional electric heaters.

[0006] An electric heater, comprising:

[0007] A shell, wherein the shell has an air duct inside, and the shell is provided with an air outlet connecting the outside world and the air duct;

[0008] A heating element is installed in the air duct, and is used for heat transfer between the air outlet and the outside world through radiation and convection;

[0009] A driving member is used to drive the heating element to rotate in the air duct to generate disturbances to the flow field in the air duct.

[0010] The above-mentioned electric heater, since the driving member can drive the heating element to rotate in the air duct, thereby disturbing the flow field in the air duct, at this time the heating element is equivalent to a rotating blade, which can enhance the convection effect between the gas in the air duct and the external gas. Compared with the existing technology, the convection effect is better.

[0011] In one embodiment, the air outlet includes an air inlet and a first air outlet which are independently arranged. The air inlet is used for taking air into the air duct, and the first air outlet is used for radiation heat transfer and convection heat transfer between the heating element and the outside world.

[0012] In one embodiment, the first air outlet includes a heat convection outlet and a heat radiation outlet that are independently arranged, the heat convection outlet is used for convection heat transfer between the heating element and the outside world, and the heat radiation outlet is used for radiation heat transfer between the heating element and the outside world.

[0013] In one of the embodiments, along the vertical direction, the air inlet is arranged closer to the ground relative to the heat convection outlet.

[0014] In one embodiment, the air inlet is opened on the bottom surface of the shell, the heat radiation port is opened on the side surface of the shell and is at least partially opposite to the heating element, and the heat convection port is opened on the top surface of the shell.

[0015] In one of the embodiments, in the initial state, the plane where the heating element is located is parallel to the plane where the heat radiation port is located;

[0016] Wherein, the driving member can drive the heating element to rotate around a rotation axis in a vertical direction.

[0017] In one embodiment, the heating element comprises at least two independent heating modules, and in the initial state, the planes where all the heating modules are located along the vertical direction are parallel to the plane where the heat radiation port is located;

[0018] The number of the driving members is equal to the number of the heating modules, and each of the driving members is used to drive each of the heating modules to rotate around a rotation axis in the vertical direction.

[0019] In one of the embodiments, in the process from the initial state to the preset state, in the vertical direction, when looking at the heating module from the side of the electric heater facing a person, a part of the heating module located above and another part of the heating module located below respectively rotate in directions away from each other to increase the radiation angle of the heating element in the vertical direction.

[0020] In one embodiment, the rotation angle of the heating element is 0-90°.

[0021] In one embodiment, the heat radiation openings are formed on two opposite sides of the housing.

[0022] In one embodiment, the housing includes a body and a radiation grille, the air inlet and the heat convection port are both opened on the body, the radiation grille is mounted on the body, and the heat radiation port is formed on the radiation grille.

[0023] In one embodiment, the heating element is an electric heating film heating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A structural diagram of an electric heater provided by an embodiment of the present invention in an initial state;

[0025] Figure 2 for Figure 1 The overall structural diagram of the electric heater shown in;

[0026] Figure 3 for Figure 2 A top view of the electric heater shown in ;

[0027] Figure 4 for Figure 2 A side view of the electric heater shown in;

[0028] Figure 5 for Figure 1 The structural diagram of the electric heater in the preset state shown in ;

[0029] Figure 6 for Figure 1 The structural diagram of the heating element of the electric heater shown in FIG. 1 when the electric heater is in an initial state;

[0030] Figure 7 for Figure 6 A plan view of the heating element shown in ;

[0031] Figure 8 for Figure 5 The electric heater shown in FIG. 1 is in a preset state and its heating element is a structural diagram;

[0032] Fig. 9 for Figure 8 Side view of the heating element shown in . DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] See also Figure 1 An embodiment of the present invention provides an electric heater 100, which is used for radiating heat and convecting heat with the outside world when powered on, so as to increase the temperature of the outside world to meet the heating needs of users. Specifically, the electric heater 100 includes a housing 10 and a heating element 20, and the heating element 20 is arranged in the housing 10 and is used for radiating heat and convecting heat with the outside world when powered on, so as to increase the temperature of the outside world to meet the heating needs of users.

[0037] The housing 10 has an air duct 13, and an air port (not shown) is provided on the housing 10 to connect the outside world with the air duct 13. The heating element 20 is installed in the air duct 13. When the heating element 20 is powered on, it transfers heat to the outside world through radiation and convection. The electric heater 100 also includes a driving member 30, which is used to drive the heating element 20 to rotate in the air duct 13 to generate disturbances in the flow field in the air duct 13.

[0038] The electric heater 100 provided in the embodiment of the present invention has a driving member 30 that can drive the heating element 20 to rotate in the air duct 13, thereby disturbing the flow field in the air duct 13. At this time, the heating element 20 is equivalent to a rotating blade, which can enhance the convection effect between the gas in the air duct 13 and the external gas. Compared with the prior art, the convection effect is better.

[0039] Continue reading Figure 1 In one embodiment, the air outlet includes an air inlet 112 and a first air outlet (not shown) which are independently arranged. The air inlet 112 is used for air intake in the air duct 13, and the first air outlet is used for radiation heat transfer and convection heat transfer between the heating element 20 and the outside. Specifically, in the vertical direction, the air inlet 112 is arranged closer to the ground relative to the first air outlet, so that the cold air entering from the air inlet 112 floats up under the action of buoyancy after heat exchange with the heating element 20 and flows to the outside from the first air outlet.

[0040] Furthermore, the air inlet 112 is opened on the bottom surface of the housing 10 , and the first air outlet is opened on the side surface and / or the top surface of the housing 10 .

[0041] In a specific embodiment, the first air outlet includes a heat convection outlet 11 and a heat radiation outlet 12 that are independently arranged, the heat convection outlet 11 is used for convection heat transfer between the heating element 20 and the outside world, and the heat radiation outlet 12 is used for radiation heat transfer between the heating element 20 and the outside world. It can be understood that in other embodiments, the heat convection outlet 11 and the heat radiation outlet 12 can also be interconnected, which is not limited here.

[0042] See also Figure 2 and Figure 3 Specifically, the heat convection port 11 is opened on the top surface of the shell 10, so that the upward hot air flow can flow to the outside through the heat convection port 11.

[0043] See also Figure 1 Also see Figure 4 In one embodiment, the heat radiation port 12 is opened on the side of the housing 10 and is at least partially opposite to the heating element 20, so that the heating element 20 radiates heat outward. It can be understood that in other embodiments, the heat radiation port 12 can also be opened on the top surface of the housing 10, which is not limited here.

[0044] It should be noted here that the above-mentioned heat convection port 11 is mainly used for convection heat transfer between the heating element 20 and the outside world, but it does not rule out the possibility that some radiant heat is transferred from the heat convection port 11 to the outside world. The above-mentioned heat radiation port 12 is used for radiation heat transfer between the heating element 20 and the outside world, but it does not rule out the possibility that some convective heat is transferred from the heat radiation port 12 to the outside world.

[0045] In a specific embodiment, two heat radiation ports 12 are provided on the housing 10, which are respectively located on two opposite sides of the housing 10, so that the radiant heat can be radiated to the outside from the two heat radiation ports 12 to improve the utilization efficiency of the heat. It can be understood that in other embodiments, only one heat radiation port 13 can be provided on the housing 10, and in this case, the radiant heat can only be radiated to the outside from the heat radiation port 12, which is not limited here.

[0046] See also Figure 5 Specifically, the housing 10 includes a body and a radiation grille 110, the air inlet 112 and the heat convection port 11 are both opened on the body, the radiation grille 110 is mounted on the body, and the heat radiation port 12 is formed on the radiation grille 110, so that the heat radiation port 12 includes a plurality of sub-radiation ports arranged at intervals. In another embodiment, the housing 10 further includes a convection grille 111, the convection grille 111 is mounted on the body, and the heat convection port 11 is formed on the convection grille 111, so that the heat convection port 11 includes a plurality of sub-convection ports arranged at intervals.

[0047] In one embodiment, the housing 10 is a hollow rectangular parallelepiped structure. It is understandable that in other embodiments, the housing 10 may also be a hollow cylindrical structure, which is not limited here.

[0048] Continue reading Figure 1 and Figure 2 Specifically, the housing 10 includes a bottom plate 14, a cover plate 15, a first side plate 16, a second side plate, a third side plate and a fourth side plate 19. The first side plate 16, the second side plate, the third side plate and the fourth side plate 19 are connected end to end and are all assembled on the bottom plate 14. The cover plate 15 is covered on the first side plate 16, the second side plate, the third side plate and the fourth side plate 19. The air inlet 112 is opened on the bottom plate 14, the heat convection port 11 is opened on the top plate 15 (including the convection grille 111), the heat radiation port 12 is opened on the first side plate 16 (including the radiation grille 110) and the third side plate (including the radiation grille 110), the second side plate and the fourth side plate 19 are closed and the inner walls of the second side plate and the fourth side plate 19 are coated with a high reflectivity material so that the heating element 20 radiates heat outward.

[0049] More specifically, the shapes and sizes of the sub-radiation ports and the sub-convection ports are not limited. For example, the sub-radiation ports and the sub-convection ports can be both rectangular, or the sub-radiation ports can be rhombus-shaped, while the sub-convection ports can be rectangular. Furthermore, the longest part of the sub-radiation ports can be 5-10 mm, and the longest part of the sub-convection ports can also be 5-10 mm.

[0050] See also Figure 1 , and see Figure 6 and Figure 7 In the initial state, the plane where the heating element 20 is located is parallel to the plane where the heat radiation port 12 is located, and the driving member 30 can drive the heating element 20 to rotate around a rotation axis in the vertical direction, thereby changing the radiation angle a (the angle between the direction perpendicular to the heating element 20 and the vertical direction) of the heating element 20 (see Fig. 9 and the flow direction of the air flow is tangent to the rotation direction of the heating element 20, which can prevent all the hot air flow from floating up under the action of buoyancy, thereby enhancing the convective heat transfer at the heat radiation port 12.

[0051] Specifically, the driving member 30 can drive the heating element 20 to rotate back and forth around a rotation axis in the vertical direction, such as rotating clockwise and then counterclockwise, and so on, and the rotation angle is 0-90°. It can be understood that in other embodiments, the driving member 30 can also drive the heating element 20 to rotate around a rotation axis in the vertical direction, which is not limited here.

[0052] In one embodiment, the driving member 30 is connected to the heating element 20 to drive the heating element 20 to rotate in the air duct 13. It can be understood that in other embodiments, the driving member 30 may not be connected to the heating element 20, but the heating element 20 may be driven to rotate in the air duct 13 by a non-contact force (such as magnetic force), which is not limited here.

[0053] Specifically, the driving member 30 is a driving motor, which is fixedly connected to the inner wall of the housing 10, and the heating element 20 is connected to the driving shaft of the driving motor. The driving shaft of the driving motor rotates to drive the heating element 20 to rotate in the air duct 13, so as to generate disturbances to the flow field in the air duct 13. More specifically, one end of the heating element 20 is connected to the driving shaft of the driving motor, and the other end is rotatably connected to the inner wall of the housing 10 through a rotating member.

[0054] In one embodiment, the heating element 20 is an electric heating film heating element 20, and the heating element 20 includes at least one electric heating film 21, and the electric heating film 21 has evenly distributed thermal resistance wires, and its emissivity is as high as 0.9. It can be understood that in other embodiments, the heating element 20 can also be selected from other types, as long as it can achieve radiation heat transfer and convection heat transfer at the same time, and it is not limited here. Specifically, the electric heating film 21 is a rectangular plate-shaped structure, and the long side of the electric heating film 21 is horizontally arranged, and the two end faces of the electric heating film 21 along its thickness direction are respectively opposite to the two heat radiation ports 12.

[0055] In one embodiment, the heating element 20 includes at least two independent heating modules. When the heating element 20 is an electric heating film heating element 20, each electric heating film 21 forms a heating module. The number of driving members 30 is equal to the number of electric heating films 21, and each driving member 30 is used to drive each electric heating film 21 to rotate around a rotation axis in the vertical direction.

[0056] Through the above arrangement, each driving member 30 can independently control the rotation of each electric heating film 21, so that different electric heating films 21 have different rotation states, or different electric heating films 21 have the same rotation state.

[0057] See also Figure 8 and Fig. 9For example, in the process from the initial state to the preset state, in the vertical direction, when looking at the electric heating film 21 from the side of the electric heater 100 facing the person, a portion of the electric heating film 21 located above and another portion of the electric heating film 21 located below can be controlled to rotate in a direction away from each other, so as to increase the radiation angle a in the vertical direction, so that the human body can receive a wider range of thermal radiation in the height direction. Specifically, in the process from the initial state to the preset state, in the vertical direction, when looking at the electric heating film 21 from the side of the electric heater 100 facing the person, a portion of the electric heating film 21 located above rotates in a clockwise direction, and another portion of the electric heating film 21 located below rotates in a counterclockwise direction.

[0058] It can be understood that in other embodiments, in the process from the initial state to the preset state, in the vertical direction, the electric heating film 21 can also rotate in other ways, such as all the electric heating films 21 rotate in the clockwise direction, which is not limited here.

[0059] The working principle of the electric heater 100 is described below in two modes: a sitting mode (corresponding to a person sitting quietly beside the electric heater 100) and a standing mode (corresponding to a person standing beside the electric heater 100):

[0060] Sit-still mode: The electric heater 100 is in the initial state (see Figure 1 , Figure 6 and Figure 7 ), at this time, in the vertical direction, all the electric heating diaphragms 21 are arranged opposite to each other up and down and are located in the same plane, and the plane is parallel to the plane where the heat radiation port 12 is located, the electric heater 100 continues to heat, the convection heat is transmitted to the outside from the heat convection port 11, and the radiation heat is radiated from the heat radiation port 12 to the human body; when the maximum temperature of the human body surface reaches 30°C, when looking at the electric heating diaphragm 21 from the side of the electric heater 100 facing the person, all the driving parts 30 drive all the electric heating diaphragms 21 to rotate back and forth in the clockwise-counterclockwise direction, and the rotation angle is 0-90°, so as to avoid overheating of the human body surface. In addition, it can also prevent all the convection heat from being transmitted to the outside from the heat convection port 11, thereby increasing the convection heat of the heat radiation port 12.

[0061] Standing mode: At this time, the electric heater 100 switches from the initial state to the preset state (see Figure 8 and Fig. 9), the control method for switching from the initial state to the preset state is: in the vertical direction, when looking at the electric heating film 21 from the side of the electric heater 100 facing the person, a part of the electric heating film 21 located at the top rotates clockwise, and the other part of the electric heating film 21 located at the bottom rotates counterclockwise. At this time, the radiation angle of the heating element 20 increases to increase the radiation range of the heating element 20 in the height direction of the human body; then the electric heater 100 continues to heat, and when the maximum surface temperature of the human body reaches 30°C, all the driving parts 30 drive all the electric heating films 21 to rotate back and forth in the clockwise-counterclockwise direction, and the rotation angle is 0-90° to avoid overheating of the human body surface. In addition, it can also prevent all convection heat from being transmitted to the outside from the heat convection port 11, thereby increasing the convection heat of the heat radiation port 12.

[0062] The electric heater 100 provided in the embodiment of the present invention has the following beneficial effects:

[0063] 1. The driving member 30 can drive the heating element 20 to rotate in the air duct 13, thereby disturbing the flow field in the air duct 13. At this time, the heating element 20 is equivalent to a rotating blade, thereby enhancing the convection effect between the gas in the air duct 13 and the external gas. Compared with the prior art, the convection effect is better;

[0064] 2. Each driving member 30 drives each electric heating diaphragm 21 to move, so that the electric heater can be switched between the sitting mode and the standing mode, so that the electric heater 100 can achieve the effect of intelligent heating.

[0065] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments 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.

[0066] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An electric heater, characterized in that: include: A housing (10), wherein the housing (10) has an air duct (13) therein, and the housing (10) is provided with an air outlet connected between the outside and the air duct (13); A heating element (20) is installed in the air duct (13), and the heating element (20) is used for radiative heat transfer and convective heat transfer between the air outlet and the outside world; A driving member (30) for driving the heating element (20) to rotate in the air duct (13) so as to generate disturbances in the flow field in the air duct (13); The air outlet comprises an air inlet (112) and a first air outlet which are independently arranged from each other, and the first air outlet comprises a heat convection outlet (11) and a heat radiation outlet (12) which are independently arranged from each other; The heating element (20) comprises at least two mutually independent heating modules, and in an initial state, the planes where all the heating modules are located in the vertical direction are parallel to the plane where the heat radiation port (12) is located; Wherein, the number of the driving members (30) is equal to the number of the heating modules, and each of the driving members (30) is used to drive each of the heating modules to rotate around a rotation axis in the vertical direction; In the process from the initial state to the preset state, in the vertical direction, when looking at the heating module from the side of the electric heater facing a person, a portion of the heating module located above and another portion of the heating module located below respectively rotate in directions away from each other to increase the radiation angle (a) of the heating element (20) in the vertical direction.

2. The electric heater according to claim 1, characterized in that: The air inlet (112) is used for the intake of air into the air duct (13), and the first air inlet is used for radiation heat transfer and convection heat transfer between the heating element (20) and the outside world.

3. The electric heater according to claim 2, characterized in that: The heat convection port (11) is used for convection heat transfer between the heating element (20) and the outside world, and the heat radiation port (12) is used for radiation heat transfer between the heating element (20) and the outside world.

4. The electric heater according to claim 3, characterized in that: In the vertical direction, the air inlet (112) is arranged close to the ground relative to the heat convection outlet (11).

5. The electric heater according to claim 4, characterized in that: The air inlet (112) is opened on the bottom surface of the outer shell (10), the heat radiation port (12) is opened on the side surface of the outer shell (10) and is at least partially opposite to the heating element (20), and the heat convection port (11) is opened on the top surface of the outer shell (10).

6. The electric heater according to claim 1, characterized in that: The rotation angle of the heating element (20) is 0-90°.

7. The electric heater according to claim 5, characterized in that: The heat radiation openings (12) are provided on two opposite side surfaces of the housing (10).

8. The electric heater according to claim 5, characterized in that: The housing (10) comprises a body and a radiation grille (110), the air inlet (112) and the heat convection port (11) are both opened on the body, the radiation grille (110) is assembled on the body, and the heat radiation port (12) is formed on the radiation grille (110).

9. The electric heater according to claim 1, characterized in that: The heating element (20) is an electric heating film heating element.

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