Electric heater with good heat transfer effect

Abstract

The utility model relates to an electric heater, in particular to an electric heater with a good heat transfer effect, which comprises a casing, a heat discharge port is arranged on the casing, an electric heating tube is mounted in the casing, a heat conduction sleeve is sleeved on the periphery of the electric heating tube, the surface area of the heat conduction sleeve is larger than that of the electric heating tube, and the heat conduction sleeve is sleeved on the casing. And heat generated by the electric heating tube is radiated outwards through the heat conduction sleeve. The heat conduction sleeve is arranged on the periphery of the electric heating tube, the surface area of the heat conduction sleeve is larger than that of the electric heating tube, heat generated by the electric heating tube is radiated outwards through the heat conduction sleeve, and the outward heat transfer efficiency of the electric heater is improved.

Description

Technical Field

[0001] This utility model relates to an electric heater, and more particularly to an electric heater with good heat transfer effect. Background Technology

[0002] An electric heater consists of a casing with a heat outlet. Inside the casing is a heating element, and behind the heating element is a reflector (also called a reflector shield). Heat is radiated outwards through the heat outlet by the heating element and the reflection of heat by the reflector, thus providing warmth. However, existing electric heaters, due to the small surface area of ​​their heating elements, cannot effectively transfer heat to the outside.

[0003] For example, the patent with publication number CN206377741 U discloses an integrated far-infrared reflector for an electric heater, which includes a reflector disposed on the housing of the electric heater. An electric heating tube is provided on the light-concentrating side of the reflector. The reflector includes a reflector plate and a reflector side plate, which are integrally bent sheet metal parts. The reflector side plate is provided with mounting holes for installing the electric heating tube.

[0004] The electric heaters described above have relatively small heating element surface areas, which prevents them from fully transferring heat to the outside, leaving room for improvement in their heat transfer performance. Utility Model Content

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is to provide an electric heater with good heat transfer effect.

[0006] The technical solution adopted by this utility model to solve the problem is: an electric heater with good heat transfer effect, including a shell, a heat outlet provided on the shell, an electric heating tube installed inside the shell, and a heat-conducting sleeve wrapped around the outer periphery of the electric heating tube, the surface area of ​​the heat-conducting sleeve being larger than the surface area of ​​the electric heating tube, and the heat generated by the electric heating tube being radiated to the outside through the heat-conducting sleeve.

[0007] As a further improvement to the above technical solution, the heat-conducting sleeve is made of metal.

[0008] As a further improvement to the above technical solution, the heating element is a radiant heating element, and the heat-conducting sleeve is made of stainless steel.

[0009] As a further improvement to the above technical solution, a fan is installed inside the housing, and the airflow discharged by the fan passes through the heat-conducting sleeve and the heat exhaust port in sequence.

[0010] As a further improvement to the above technical solution, the heat-conducting sleeve is elliptical cylindrical, with the front and rear sides of the heat-conducting sleeve being a first long arc surface and a second long arc surface, respectively, and the heat-conducting sleeve having a major axis and a minor axis.

[0011] As a further improvement to the above technical solution, a reflector is installed inside the housing, with the first long arc surface facing the heat exhaust port and the second long arc surface facing the reflector.

[0012] As a further improvement to the above technical solution, a fan is installed inside the housing. The fan, the heat-conducting sleeve, and the heat exhaust port are located on the same straight line. The long axis of the heat-conducting sleeve is perpendicular to the plane where the heat exhaust port is located. The airflow direction of the fan is parallel to the long axis. The airflow of the fan flows through the first long arc surface and the second long arc surface before being discharged from the heat exhaust port.

[0013] As a further improvement to the above technical solution, an air duct is provided inside the housing. The air duct is shaped like the number 7, with a heat exhaust port and a fan at each end. The electric heating tube and the heat-conducting sleeve are installed inside the air duct. The long axis of the heat-conducting sleeve is perpendicular to the plane where the heat exhaust port is located. The airflow from the fan flows through the first long arc surface and the second long arc surface before being discharged from the heat exhaust port.

[0014] As a further improvement to the above technical solution, the heat exhaust port is equipped with a grille or a protective plate.

[0015] As a further improvement to the above technical solution, the outer periphery of the heat-conducting sleeve has an infrared coating.

[0016] The beneficial effects of this utility model are: by setting a heat-conducting sleeve around the outer periphery of the electric heating tube, the heat generated by the electric heating tube is radiated to the outside through the heat-conducting sleeve, thereby improving the heat transfer efficiency of the electric heater. Attached Figure Description

[0017] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention without a fan;

[0019] Figure 2 for Figure 1 A sectional view;

[0020] Figure 3 This is a cross-sectional view of the heat-conducting sleeve;

[0021] Figure 4 This is a schematic diagram of the overall structure of an embodiment of the present invention, including a fan and a straight-line air duct;

[0022] Figure 5 for Figure 4 A sectional view;

[0023] Figure 6This is a schematic diagram of the overall structure of an embodiment of the present invention, including a fan and a figure-seven shaped air duct;

[0024] Figure 7 for Figure 6 A sectional view;

[0025] In the figure: 1-shell, 11-heat exhaust port, 2-heating tube, 3-heat conducting sleeve, 31-first long arc surface, 32-second long arc surface, 33-long axis, 34-short axis, 4-fan, 5-reflector, 6-grid. Detailed Implementation

[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Reference Figures 1 to 7An electric heater with good heat transfer efficiency includes a housing 1, on which a heat outlet 11 is provided. An electric heating tube 2 is installed inside the housing 1, and a heat-conducting sleeve 3 is fitted around the outer periphery of the electric heating tube 2. The surface area of ​​the heat-conducting sleeve 3 is larger than that of the electric heating tube 2. The heat generated by the electric heating tube 2 is first transferred to the heat-conducting sleeve 3. After absorbing a considerable amount of heat, the heat-conducting sleeve 3 radiates heat to the outside through the heat outlet 11. By setting the heat-conducting sleeve 3 around the outer periphery of the electric heating tube 2, and the heat generated by the electric heating tube 2 is radiated to the outside through the heat-conducting sleeve 3, the heat transfer efficiency of the electric heater is improved.

[0031] In some embodiments, the shape of the heat-conducting sleeve 3 is not limited to cylindrical or elliptical cylindrical.

[0032] In a preferred embodiment, the heat-conducting sleeve 3 is made of metal, including but not limited to aluminum, iron, and stainless steel.

[0033] In a preferred embodiment, the heating element 2 is a radiant heating element 2, and the heat-conducting sleeve 3 is made of stainless steel. Traditional radiant heating elements 2 produce strong and glaring visible light during operation. This invention effectively blocks this visible light by using the heat-conducting sleeve 3, improving the user experience. Furthermore, the heat-conducting sleeve 3 is preferably made of stainless steel, which has a higher melting point than other metals, reducing the risk of the heat-conducting sleeve 3 melting.

[0034] In a preferred embodiment, a fan 4 is installed inside the housing 1, and the airflow from the fan 4 passes sequentially through the heat-conducting sleeve 3 and the heat exhaust port 11. By setting the fan 4, on the one hand, the heat generated by the electric heater can be effectively conducted to the outside; on the other hand, the airflow velocity around the heat-conducting sleeve 3 is increased, preventing the heat-conducting sleeve 3 from melting due to excessive temperature.

[0035] In a preferred embodiment, the heat-conducting sleeve 3 is elliptical cylindrical, with a first long arc surface 31 and a second long arc surface 32 on its front and rear sides, respectively. The heat-conducting sleeve 3 has a major axis 33 and a minor axis 34. A reflector 5 is installed inside the housing 1. The first long arc surface 31 faces the heat dissipation port 11, and the second long arc surface 32 faces the reflector 5. Compared with the cylindrical heat-conducting sleeve 3, the first long arc surface 31 of the elliptical cylindrical heat-conducting sleeve 3 has a larger external heat transfer area, which can further improve the heat transfer efficiency.

[0036] In a preferred embodiment, a fan 4 is installed inside the housing 1. The fan 4, the heat-conducting sleeve 3, and the heat exhaust port 11 are located on the same straight line (i.e., the air duct is in a straight line). The long axis 33 of the heat-conducting sleeve 3 is perpendicular to the plane where the heat exhaust port 11 is located. The airflow direction of the fan 4 is parallel to the long axis 33 (collinear). The airflow of the fan 4 flows through the first long arc surface 31 and the second long arc surface 32 before being discharged from the heat exhaust port 11, further improving the heat transfer efficiency of the electric heater to the outside.

[0037] In a preferred embodiment, an air duct is provided inside the housing 1. The air duct is shaped like a figure 7, with a heat exhaust port 11 and a fan 4 at each end. The electric heating tube 2 and the heat-conducting sleeve 3 are installed inside the air duct. The long axis 33 of the heat-conducting sleeve 3 is perpendicular to the plane where the heat exhaust port 11 is located. The airflow from the fan 4 flows through the first long arc surface 31 and the second long arc surface 32 before being discharged from the heat exhaust port 11, further improving the heat transfer efficiency of the electric heater and enabling it to adapt to corner installation positions.

[0038] In a preferred embodiment, the heat outlet 11 is equipped with a grille 6 or a protective plate to improve the safety of the electric heater.

[0039] Specifically, the outer periphery of the heat-conducting sleeve 3 has an infrared coating.

[0040] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. An electric heater with good heat transfer effect, comprising a shell (1), wherein a heat outlet (11) is provided on the shell (1), and an electric heating tube (2) is installed inside the shell (1), characterized in that: The heating tube (2) is surrounded by a heat-conducting sleeve (3). The surface area of ​​the heat-conducting sleeve (3) is larger than that of the heating tube (2). The heat generated by the heating tube (2) is radiated to the outside through the heat-conducting sleeve (3). The heat-conducting sleeve (3) is elliptical cylindrical. The front and rear sides of the heat-conducting sleeve (3) are a first long arc surface (31) and a second long arc surface (32), respectively. The heat-conducting sleeve (3) has a major axis (33) and a minor axis (34).

2. The electric heater with good heat transfer effect as described in claim 1, characterized in that: The heat-conducting sleeve (3) is made of metal.

3. The electric heater with good heat transfer effect as described in claim 2, characterized in that: The heating element (2) is a radiant heating element (2), and the heat-conducting sleeve (3) is made of stainless steel.

4. The electric heater with good heat transfer effect as described in claim 1, characterized in that: A fan (4) is installed inside the housing (1), and the airflow from the fan (4) passes through the heat-conducting sleeve (3) and the heat outlet (11) in sequence.

5. The electric heater with good heat transfer effect as described in claim 1, characterized in that: A reflector plate (5) is installed inside the housing (1), with the first long arc surface (31) facing the heat dissipation port (11) and the second long arc surface (32) facing the reflector plate (5).

6. The electric heater with good heat transfer effect as described in claim 1, characterized in that: A fan (4) is installed inside the housing (1). The fan (4), the heat-conducting sleeve (3) and the heat exhaust port (11) are located on the same straight line. The long axis (33) of the heat-conducting sleeve (3) is perpendicular to the plane where the heat exhaust port (11) is located. The airflow direction of the fan (4) is parallel to the long axis (33). The airflow of the fan (4) flows through the first long arc surface (31) and the second long arc surface (32) before being discharged from the heat exhaust port (11).

7. The electric heater with good heat transfer effect as described in claim 1, characterized in that: The housing (1) is provided with an air duct, which is shaped like the number 7. The two ends of the air duct are a heat exhaust port (11) and a fan (4), respectively. The electric heating tube (2) and the heat-conducting sleeve (3) are installed in the air duct. The long axis (33) of the heat-conducting sleeve (3) is perpendicular to the plane where the heat exhaust port (11) is located. The airflow from the fan (4) flows through the first long arc surface (31) and the second long arc surface (32) before being discharged from the heat exhaust port (11).

8. The electric heater with good heat transfer effect as described in claim 1, characterized in that: The heat outlet (11) is equipped with a grille (6) or a protective plate.

9. An electric heater with good heat transfer effect as described in claim 1, characterized in that: The outer periphery of the heat-conducting sleeve (3) has an infrared coating.

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