Constant-temperature heat preservation fan cover

Abstract

The utility model discloses a constant temperature heat preservation fan cover, including cover body, fixed ring, heating wire, U-shaped metal sheet and flexible heat preservation cover, the flexible heat preservation cover is laid on the outer wall of cover body, the top and bottom of flexible heat preservation cover are fixedly connected with the cover body through fixed ring, the flexible heat preservation cover is internally provided with a plurality of heating wire, the U-shaped metal sheet is provided with the U-shaped metal sheet, and the U-shaped metal sheet is provided with the U-shaped metal sheet. A plurality of U-shaped metal sheets are arranged on the side, making contact with the cover body, of the flexible heat preservation cover, abut against the outer wall of the cover body, are in a contracted state at the low temperature and are in an open state after being heated, and the U-shaped metal sheets in the open state open the flexible heat preservation cover to form an air heat insulation layer. The heating wire is electrified before air exhaust, and the cover body is fully preheated after the heating wire is heated, so that condensed wastewater generated due to overlarge temperature difference in cold seasons is prevented; after being heated, the U-shaped metal sheet is opened outwards to open the flexible heat preservation cover, and an air heat insulation layer is formed between the opened flexible heat preservation cover and the cover body, so that the heated high-temperature cover body cannot be influenced by the environment temperature to reduce the temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of air hoods, in particular to a constant temperature heat preservation air hood. Background Art

[0002] The hood is a crucial component of the exhaust system. Airflow through the hood opening traps harmful substances, controls the flow of polluted gases, and prevents them from spreading into the indoor air. Existing hoods are typically made of sheet metal. During cold weather, the exposed hood's overall temperature is very low. When hot, humid exhaust gas is first captured by the hood, the significant temperature difference causes condensation to form on the hood's inner surface. This condensation accumulates and drips onto the floor below the hood, impacting the working environment. Therefore, a constant-temperature, insulated hood has been designed to address this issue. Utility Model Content

[0003] Aiming at the deficiencies of the existing wind hoods, the purpose of the utility model is to provide a constant temperature and heat preservation wind hood, which has the advantages of preventing the generation of condensed waste water and maintaining a constant temperature of the wind hood.

[0004] To achieve the above-mentioned purpose, the present invention adopts a technical solution: a constant temperature insulation hood, comprising a hood body, a fixing ring, a heating wire, a U-shaped metal sheet and a flexible insulation hood, wherein the flexible insulation hood is laid on the outer wall of the hood, the top and bottom of the flexible insulation hood are fixedly connected to the hood body through the fixing ring, a plurality of heating wires are arranged inside the flexible insulation hood, a plurality of U-shaped metal sheets are arranged on the side of the flexible insulation hood contacting the hood body, the U-shaped metal sheets are against the outer wall of the hood, the U-shaped metal sheets are in a contracted state at low temperatures, and are in an open state after being heated, and the U-shaped metal sheets are in the open state to prop up the flexible insulation hood to form an air insulation layer;

[0005] Preferably, the U-shaped metal sheet and the heating wire are staggered; the staggered heating wire will not directly heat the U-shaped metal sheet, so that the cover can be fully preheated after the heating wire is heated;

[0006] Preferably, the outer layer of the flexible heat-insulating cover is a heat-insulating layer of a reflective material, and the inner layer of the flexible heat-insulating cover that is in contact with the cover body is a heating layer of a heat-conductive material, and the heating layer is used to set a heating wire;

[0007] Preferably, the U-shaped metal sheet is formed as a bimetallic sheet;

[0008] The beneficial effects of the present invention are: 1. The heating wire is energized before exhausting the air, and the heating wire will fully preheat the cover body after it heats up, thereby preventing condensation wastewater from being generated due to excessive temperature difference in cold seasons; 2. When the cover body is fully preheated, the power supply of the heating wire is disconnected. At this time, the cover body is continuously in a high temperature state under the heating of the high-temperature exhaust gas, and the U-shaped metal sheet is heated and opened outward to hold the flexible insulation cover open, so that an air insulation layer is formed between the flexible insulation cover and the cover body, so that the heated high-temperature cover body will not be affected by the ambient temperature and the temperature will not be lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a cross-sectional structural view of the cover body of the utility model in a low-temperature state.

[0010] Figure 2 This is a cross-sectional structural view of the cover body of the utility model in a high-temperature state.

[0011] Figure 3 It is a top view of the utility model.

[0012] Figure 4 For this utility model Figure 1 A local magnified view of area I in the middle.

[0013] Figure 5 For this utility model Figure 2 A local magnified view of area II. DETAILED DESCRIPTION

[0014] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0015] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0016] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "provided with," and "set" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0017] See also Figures 1 to 5 , the embodiments of the present utility model include:

[0018] A constant temperature insulation hood, comprising a hood body 1, a fixing ring 2, a heating wire 3, a U-shaped metal sheet 4 and a flexible insulation hood 5, wherein the flexible insulation hood 5 is laid on the outer wall of the hood body 1, and the top and bottom of the flexible insulation hood 5 are fixedly connected to the hood body 1 through the fixing ring 2, a plurality of heating wires 3 are provided in the flexible insulation hood 5, a plurality of U-shaped metal sheets 4 are provided on the side of the flexible insulation hood 5 contacting the hood body 1, and the U-shaped metal sheets 4 are against the outer wall of the hood body 1, and the U-shaped metal sheets 4 are in a contracted state at low temperatures and in an expanded state after being heated. The expanded state of the U-shaped metal sheets 4 props up the flexible insulation hood 5 to form an air insulation layer 6;

[0019] Preferably, the U-shaped metal sheet 4 and the heating wire 3 are staggered; the staggered heating wire 3 does not directly heat the U-shaped metal sheet 4, so that the cover body 1 can be fully preheated after the heating wire 3 is heated;

[0020] Preferably, the outer layer of the flexible heat-insulating cover 5 is a heat-insulating layer of a reflective material, and the inner layer of the flexible heat-insulating cover 5 that is in contact with the cover body 1 is a heating layer of a heat-conductive material, and the heating layer is used to set the heating wire 3;

[0021] Preferably, the U-shaped metal sheet 4 is formed as a bimetallic sheet;

[0022] Through the above settings, in the actual working process, its specific working principle is as follows:

[0023] Before exhausting, the heating wire 3 is energized. After the heating wire 3 is heated up, it will fully preheat the cover body 1, thereby preventing condensation wastewater from being generated due to excessive temperature difference in cold seasons;

[0024] When the cover body 1 is fully preheated, the power supply of the heating wire 3 is disconnected. At this time, the cover body 1 continues to be in a high temperature state under the heating of the high-temperature exhaust gas. The U-shaped metal sheet 4 is heated and opens outward to open the flexible thermal insulation cover 5, so that an air insulation layer 6 is formed between the flexible thermal insulation cover 5 and the cover body 1, so that the heated high-temperature cover body 1 will not be affected by the ambient temperature and the temperature will not be lowered. At this time, the high-temperature cover body 1 will not directly conduct heat to the heating wire 3, thereby extending the service life of the heating wire 3.

[0025] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A constant temperature heat preservation hood, characterized in that: The utility model comprises a cover body, a fixing ring, a heating wire, a U-shaped metal sheet and a flexible thermal insulation cover, wherein the flexible thermal insulation cover is laid on the outer wall of the cover body, the top and bottom of the flexible thermal insulation cover are fixedly connected to the cover body through the fixing ring, a plurality of heating wires are arranged in the flexible thermal insulation cover, a plurality of U-shaped metal sheets are arranged on the side of the flexible thermal insulation cover contacting the cover body, the U-shaped metal sheets are against the outer wall of the cover body, the U-shaped metal sheets are in a contracted state at low temperatures, the U-shaped metal sheets are in an open state after being heated, and the open state of the U-shaped metal sheets props up the flexible thermal insulation cover to form an air insulation layer.

2. A constant temperature insulation hood according to claim 1, characterized in that: The U-shaped metal sheet and the heating wire are staggered.

3. The constant temperature insulation hood according to claim 1, characterized in that: The outer layer of the flexible heat-insulating cover is a heat-insulating layer made of a reflective material, and the inner layer of the flexible heat-insulating cover that fits the cover body is a heating layer made of a heat-conducting material, and the heating layer is used to set a heating wire.

4. The constant temperature insulation hood according to claim 1, characterized in that: The U-shaped metal sheet is formed as a bimetallic sheet.

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