Electric heater

Abstract

According to the electric heater provided by the technical scheme of the utility model, through the optimal design of the air inlet component, the air outlet component and the airflow channel, the problems of poor convection performance, overheat machine body, low heating efficiency and the like of the traditional electric heater are solved. Specifically, after entering from the air inlet, external cold air is guided by the first guide part and stably enters the auxiliary air inlet along the air inlet channel, it is ensured that the cold air fully enters the electric heater, and the problem that cold air supplement at the air inlet of a traditional design is insufficient is solved; and on the other hand, hot air is prompted to be discharged rapidly, the heated hot air rises, enters the air outlet channel through the auxiliary air outlet and is rapidly discharged from the air outlet under the guidance of the second guide part, hot air retention is reduced, and the heat exchange efficiency is improved. According to the technical scheme, the safety problem caused by overheating of the interior of the electric heater due to heat accumulation caused by unsmooth convection of a traditional electric heater is solved.

Description

Technical Field

[0001] This utility model relates to the field of indoor heating technology, and in particular to an electric heater. Background Technology

[0002] The development of convection heaters is closely related to people's demand for heating equipment and technological advancements. Early heating devices, such as fireplaces and heated brick beds, suffered from uneven heat distribution and poor safety. With the widespread use of electricity, people began to develop heating equipment powered by electricity. Convection heaters utilize the principle of air convection to achieve uniform heating. Their earliest inventions can be traced back to the early 20th century in some European countries, primarily designed to meet indoor heating needs and provide a more comfortable, safe, and convenient heating method.

[0003] Convection heaters utilize the principle of air flow, conducting heat through micro-circulation of air. They have an air vent at the top and an air inlet at the bottom of the casing. When powered on, the air around the heating element is heated and rises, flowing out of the vent, while cooler surrounding air enters through the inlet to replenish it. This cycle repeats, raising the room temperature. This working principle is based on the fact that hot air is less dense than cold air, creating natural convection. This generates a relatively uniform temperature field indoors, providing comfortable warmth without any perceptible airflow, thus preventing discomfort.

[0004] During the actual use of electric heaters, the inventors discovered at least the following problems in the existing technology:

[0005] When an electric heater is running continuously, due to a poorly designed air inlet, external cold air cannot enter the heater sufficiently and smoothly, resulting in insufficient cold air supply. Simultaneously, the airflow resistance at the outlet is high, preventing the heated air from dissipating promptly, causing heat to accumulate inside the unit. This reduces the heater's heating efficiency and causes the surface temperature to rise continuously, even exceeding safety thresholds. If a user accidentally touches the hot surface, they are at high risk of burns, seriously affecting safety and comfort during use.

[0006] Given the limitations of existing electric heaters, there is an urgent need for a new technical solution to address the problem of poor convection performance in existing electric heaters. Utility Model Content

[0007] In order to overcome the shortcomings of the existing technology, this utility model proposes an electric heater to solve the problem of poor convection performance of electric heaters in the existing technology.

[0008] In a first aspect, the electric heater includes a housing, a heating element disposed within the housing, an air inlet component at the bottom of the housing, and an air outlet component at the top. The air inlet component includes an air inlet located on the outer side of the housing, an auxiliary air inlet located on the inner side of the housing, and a first guide portion connecting the air inlet and the auxiliary air inlet. The air inlet, the first guide portion, and the auxiliary air inlet together form an air inlet channel. The air outlet component includes an air outlet located on the outer side of the housing, an auxiliary air outlet located on the inner side of the housing, and a second guide portion connecting the air outlet and the auxiliary air outlet. The air outlet, the second guide portion, and the auxiliary air outlet together form an air outlet channel. An airflow channel connects the auxiliary air inlet and the auxiliary air outlet, allowing external air to sequentially enter the air inlet channel, the airflow channel, and the air outlet channel before being discharged.

[0009] Furthermore, the air inlet and the first guide portion have a first arc-shaped connection portion.

[0010] Furthermore, the diameter of the air inlet is larger than the diameter of the auxiliary air inlet.

[0011] Furthermore, the root end of the first guide portion is connected to the outer casing, and the extension end of the first guide portion extends inward and upward toward the inner side of the outer casing.

[0012] Furthermore, the air inlet and the first guide portion have a first arc-shaped connection portion.

[0013] Furthermore, the air outlet and the second guide portion have a second arc-shaped connection portion.

[0014] Furthermore, the diameter of the air outlet is larger than the diameter of the auxiliary air outlet.

[0015] Furthermore, the root end of the second guide portion is connected to the outer casing, and the extension end of the second guide portion extends inward and downward toward the inner side of the outer casing.

[0016] Furthermore, the air outlet and the second guide portion have a second arc-shaped connection portion.

[0017] Furthermore, as described above, the openings of the auxiliary air inlet and the auxiliary air outlet are arranged opposite to each other.

[0018] The technical solutions provided in this application have the following advantages compared with the prior art:

[0019] This utility model provides an electric heater that solves the problems of poor convection performance, overheating, and low heating efficiency in traditional electric heaters through optimized design of the air inlet component, air outlet component, and airflow channel. Specifically, after external cold air enters through the air inlet, it is guided by the first guide section and stably enters the auxiliary air inlet along the air inlet channel, ensuring sufficient cold air enters the heater and avoiding the problem of insufficient cold air supply at the air inlet in traditional designs. On the other hand, it promotes rapid exhaust of hot air: the heated air rises, enters the air outlet channel through the auxiliary air outlet, and is quickly exhausted from the air outlet under the guidance of the second guide section, reducing hot air stagnation and improving heat exchange efficiency. This technical solution solves the problem of heat accumulation and overheating caused by poor convection in traditional electric heaters, which can lead to safety issues. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0023] Figure 1 This is a schematic diagram of the structure of an electric heater provided in an embodiment of this application;

[0024] Figure 2 This is a structural schematic diagram of the air intake component of this application;

[0025] Figure 3 This is a structural schematic diagram of the air outlet component of this application;

[0026] Figure 4 This is a schematic diagram of the airflow direction inside the electric heater of this application.

[0027] Figure label explanation:

[0028] 1-Air inlet component, 11-Air inlet, 12-Auxiliary air inlet, 13-First guide part, 14-Air inlet channel, 15-First arc-shaped connecting part, 2-Air outlet component, 21-Air outlet, 22-Auxiliary air outlet, 23-Second guide part, 24-Air outlet channel, 25-Second arc-shaped connecting part, 3-Airflow channel, A-Diameter of air inlet, B-Diameter of auxiliary air inlet, C-Diameter of air outlet, D-Diameter of auxiliary air outlet. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0031] To address the safety concerns arising from poor convection in traditional electric heaters, which can lead to heat buildup and overheating, this application provides an electric heater that can effectively heat incoming cold air while simultaneously venting the heated air to the outside.

[0032] This invention provides a detailed description of an electric heater, including a housing containing a heating element and a power control component. The heating element is electrically connected to the power control component to convert electrical energy into heat energy. In some specific embodiments, the heating element is positioned near the air outlet to allow heated air to be discharged to the outside.

[0033] In this embodiment, as Figure 1 As shown, an air intake component 1 is provided below the outer casing. The air intake component 1 is located on one side of the outer casing and is used to bring cold air from the outside into the electric heater.

[0034] Detailed, such as Figure 2As shown, the air intake component 1 includes an air inlet 11 located on the outer side of the outer casing, an auxiliary air inlet 12 located on the inner side of the outer casing, and a first guide portion 13 connecting the air inlet 11 and the auxiliary air inlet 12. The air inlet 11, the first guide portion 13, and the auxiliary air inlet 12 together form an air intake channel 14. An air outlet component 2 is provided above the outer casing. The air outlet component 2 includes an air outlet 21 located on the outer side of the outer casing, an auxiliary air outlet 23 located on the inner side of the outer casing, and a second guide portion 23 connecting the air outlet 21 and the auxiliary air outlet 23. The air outlet 21, the second guide portion 23, and the auxiliary air outlet 23 together form an air outlet channel 24. It should also be noted that an airflow channel 3 connects the auxiliary air inlet 12 and the auxiliary air outlet 23, allowing external air to sequentially enter the air intake channel 14, the airflow channel 3, and the air outlet channel 24 before being discharged.

[0035] When the electric heater is turned on, during the intake phase of cold air, the heating element inside the casing rapidly releases heat, causing the internal temperature of the casing to rise sharply. According to thermodynamic principles, in a high-temperature environment, the movement of air molecules intensifies, and the density decreases, resulting in a significantly lower air pressure inside the heater casing compared to the external environment. At this time, the external cold air, due to its lower temperature and higher air pressure, is driven by this significant pressure difference to form an airflow trend. The outside cold air rushes in through the air inlet 11 on the outside of the casing, and guided by the first guide part 13, passes through the air intake channel 14, and finally enters the interior of the electric heater through the auxiliary air inlet 12. This design ensures that cold air fully enters the interior of the electric heater, avoiding the problem of insufficient cold air replenishment in traditional designs.

[0036] During the heat exchange stage, when the electric heater is turned on, cold air from outside continuously enters the interior of the heater through the air inlet component 1. After contact with the heating element, the air inside the heater moves more rapidly under the influence of thermal buoyancy, forming a hot airflow. This hot airflow continues to rise along the airflow channel 3, eventually reaching the auxiliary air outlet 22 and entering the hot air exhaust stage. This design reduces hot air retention and improves heat exchange efficiency.

[0037] During the hot air exhaust phase, after the hot air comes out from the auxiliary air outlet 22, it is guided by the second guide part 23 and discharged to the outside through the air outlet channel 14.

[0038] In this way, the electric heater completes the process of drawing in cold air, heating it into hot air, and then delivering the hot air to the surrounding environment, thus forming an indoor circulation process.

[0039] This technical solution, through the coherent design of the air inlet channel 14, airflow channel 3, and air outlet channel 24, forms an efficient circulation, allowing cold air to fully contact the heating element, improving the thermal energy utilization rate, and effectively solving the problem of heat accumulation caused by poor convection in traditional electric heaters.

[0040] In one embodiment of this utility model, such as Figure 2 As shown, the root end of the first guide portion 13 is connected to the outer casing, and the extension end of the first guide portion 13 extends inward and upward toward the inner side of the outer casing. It should be understood that the first guide portion 13 is inclined at a preset angle to the surface of the outer casing. There are no special requirements for this preset angle, as long as it is inclined to the surface of the outer casing.

[0041] During the flow of cold air, the cold air enters the auxiliary air inlet 12 along the inclined surface of the first guide 13. This process effectively reduces airflow resistance and ensures that the cold air can quickly and smoothly enter the electric heater, laying the foundation for subsequent heat exchange with the heating element.

[0042] In one embodiment of this utility model, such as Figure 2 As shown, the air inlet 11 and the first guide portion 13 have a first arc-shaped connecting portion 15.

[0043] During use, driven by the air pressure difference, external cold air rushes directly towards the air inlet 11. At this time, the flow direction of the cold air is primarily a straight line towards the air inlet 11, determined by the driving force generated by the air pressure difference. When the air contacts the first arc-shaped connecting part 15, the special shape of the arc-shaped connecting part 15 changes the original straight-line trajectory of the air. Due to the inertia of the fluid, the air flows along the surface of the arc-shaped connecting part 15. In this process, the air flow direction gradually changes from its original straight direction to a curved direction. This change is a relatively smooth process, avoiding abrupt changes in airflow that would generate significant resistance. This better facilitates the introduction of external cold air into the interior of the electric heater, helping to improve air intake efficiency and allowing more cold air to smoothly enter the electric heater and exchange heat with the heating element.

[0044] In one embodiment of this utility model, such as Figure 3 As shown, the diameter A of the air inlet 11 is larger than the diameter B of the auxiliary air inlet 12.

[0045] When in use, as air flows from the larger diameter air inlet 11 to the smaller diameter auxiliary air inlet 12, the airflow speed increases, and the pressure also changes. This change helps to create a certain negative pressure inside the electric heater, making it easier for outside air to be drawn into the air intake channel 14.

[0046] In addition, in another embodiment, the design that the diameter of the air inlet 11 is larger than that of the auxiliary air inlet 12, in conjunction with the first arc-shaped connecting part 15 between the air inlet 11 and the first guide part 13, as described above, allows the two to work together to improve air intake efficiency.

[0047] In detail, during use, the larger air inlet 11 allows air to enter more smoothly, providing a stable airflow to the first arc-shaped connecting part 15. The first arc-shaped connecting part 15 then guides the air entering from the large-diameter air inlet 11 into the first guide part 13, allowing it to smoothly transition to the small-diameter auxiliary air inlet 12. This design allows the air to gradually adapt to the decrease in diameter, reducing airflow energy loss and turbulence, and improving air intake efficiency.

[0048] Without the first arc-shaped connecting part 15, when air flows directly from the large-diameter air inlet 11 to the small-diameter auxiliary air inlet 12, large eddies and turbulence will be generated at the interface, resulting in poor airflow and even noise and backflow.

[0049] Therefore, after air enters the electric heater from the air inlet component 1 and is heated, it is discharged from the air outlet component 2 under the action of thermal buoyancy. To ensure that the hot air reaches the auxiliary air outlet 22 smoothly, such as... Figure 3 As shown, in this embodiment, the opening of the auxiliary air inlet 12 and the opening of the auxiliary air outlet 22 are arranged opposite to each other.

[0050] It should be understood that when the electric heater is working, cold air enters through the auxiliary air inlet 12 and hot air exits through the auxiliary air outlet 22, forming a direct convection channel. Based on the principle of heat exchange, the cold air is heated as it flows through the heating element, while the hot air is discharged from the opposite auxiliary air outlet 12 under the action of pressure difference, thus realizing heat transfer and air circulation.

[0051] It should also be noted that, such as Figure 4 As shown, this direct convection channel is the airflow channel 3 mentioned above. It should be understood that the airflow channel 3 is an airflow path formed by the convection of cold and hot air inside the electric heater. It is not a physically completely closed, pipe-like actual "airflow channel," but rather the airflow path is formed by the relative arrangement of the openings of the auxiliary air inlet 12 and the auxiliary air outlet 22.

[0052] The specific usage process is as follows: when cold air enters from the auxiliary air inlet 12, it is heated by the heating element, flows along the airflow channel 3 to the auxiliary air outlet 12, and is discharged to the outside from the auxiliary air outlet 12. This series of flow directions constitutes the airflow path.

[0053] Furthermore, after the hot air reaches the auxiliary air outlet 22, it can be smoothly discharged to the outside, such as... Figure 3 and Figure 4 As shown, the root end of the second guide portion 23 in the air outlet component 2 is connected to the outer casing, and the extension end of the second guide portion 23 extends inward and downward toward the inner side of the outer casing, that is, the second guide portion 23 is inclined at a certain angle to the inner surface of the outer casing. A second arc-shaped connecting portion 25 is provided between the air outlet 21 and the second guide portion 23. The diameter C of the air outlet 21 is larger than the diameter D of the auxiliary air outlet 22.

[0054] During use, the air inside the electric heater rises continuously as the heating element heats up, forming hot air that eventually converges at the auxiliary air outlet 22. Since the diameter D of the auxiliary air outlet 22 is smaller than the diameter C of the main outlet 21, the initial flow velocity of the hot air exiting the auxiliary air outlet 22 is relatively high. This design accelerates the discharge of hot air, enhances its diffusion capacity, and simultaneously creates internal negative pressure, pushing the hot air outwards.

[0055] After these hot air streams exit from the auxiliary air outlet 22, they are guided downwards by the inclined surface of the second guide 23, causing the hot air streams to be discharged downwards. However, due to the upward trend of the hot air streams, the hot air streams flowing to the outside will be pushed upwards, creating indoor air circulation around the outside of the outer casing and promoting temperature uniformity.

[0056] Furthermore, the design of the second arc-shaped connecting part 25 enables the hot airflow to smoothly transition to the outside, reducing the resistance of the hot airflow during the exhaust process and reducing the noise of the hot airflow exhaust.

[0057] Therefore, the design of this air outlet component 2 can ensure that hot air is discharged quickly and diffused evenly, creating a comfortable heating environment and bringing a better experience to users.

[0058] In summary, the electric heater of this technical solution can form an efficient and stable air convection circulation system inside the device through the coordinated cooperation of the air inlet component 1 and the air outlet component 2.

[0059] Depending on actual usage requirements, the air inlet component 1 and the air outlet component 2 can be configured in multiple ways. They can be set as two or three symmetrical groups, or different numbers of air inlet components 1 and air outlet components 2 can be flexibly configured according to specific application scenarios (such as setting two groups of air inlet components 1 and three groups of air outlet components 2). This design significantly improves the adaptability of the electric heater, ensuring optimal air circulation in various installation environments.

[0060] Compared to traditional electric heaters, this solution enables rapid exhaust of hot air and efficient replenishment of cold air. It also fundamentally solves the problem of internal temperature accumulation caused by poor air convection in existing products, effectively eliminating overheating safety hazards and significantly improving the safety and thermal efficiency of equipment operation.

[0061] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0062] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0063] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0065] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0066] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electric heater, comprising a housing, a heating element disposed within the housing, an air inlet component disposed at the bottom of the housing, and an air outlet component disposed at the top of the housing, characterized in that: The air intake component includes an air intake located on the outer side of the housing, an auxiliary air intake located on the inner side of the housing, and a first guide portion connecting the air intake and the auxiliary air intake. The air intake, the first guide portion, and the auxiliary air intake together form an air intake channel. The air outlet component includes an air outlet located on the outer side of the housing, an auxiliary air outlet located on the inner side of the housing, and a second guide portion connecting the air outlet and the auxiliary air outlet. The air outlet, the second guide portion, and the auxiliary air outlet together form an air outlet channel. An airflow channel connects the auxiliary air inlet and the auxiliary air outlet, allowing external air to sequentially enter the air inlet channel, the airflow channel, and the air outlet channel before being discharged.

2. The electric heater according to claim 1, characterized in that: The air inlet and the first guide portion have a first arc-shaped connection portion.

3. An electric heater according to claim 1, characterized in that: The diameter of the air inlet is larger than the diameter of the auxiliary air inlet.

4. An electric heater according to claim 3, characterized in that: The root end of the first guide portion is connected to the outer casing, and the extension end of the first guide portion extends inward and upward toward the inner side of the outer casing.

5. An electric heater according to claim 4, characterized in that: The air inlet and the first guide portion have a first arc-shaped connection portion.

6. An electric heater according to claim 1, characterized in that: The air outlet and the second guide portion have a second arc-shaped connection portion.

7. An electric heater according to claim 1, characterized in that: The diameter of the air outlet is larger than the diameter of the auxiliary air outlet.

8. An electric heater according to claim 7, characterized in that: The root end of the second guide portion is connected to the outer casing, and the extension end of the second guide portion extends inward and downward toward the inner side of the outer casing.

9. An electric heater according to claim 8, characterized in that: The air outlet and the second guide portion have a second arc-shaped connection portion.

10. An electric heater according to claim 5 or 9, characterized in that: The openings of the auxiliary air inlet and the auxiliary air outlet are arranged opposite to each other.

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