Distributed exhaust duct structure applied to tobacco dryer

Abstract

The utility model discloses a distributed exhaust duct structure applied to a tobacco dryer, which comprises an outer machine assembly and an inner machine assembly, the inner machine assembly comprises an inner machine shell connected with the outer machine assembly, an air return duct is arranged at the top end of the inner machine shell, an exhaust air guide duct is arranged in the air return duct, and the exhaust air guide duct is connected with the outer machine assembly. An air return valve is installed on the exhaust air guide duct, and the air outlet direction of a valve port of the air return valve is parallel to the air return direction of the air return duct and perpendicular to the air outlet direction of the exhaust air guide duct. The air outlet direction of the valve port of the air return valve is parallel to the air return direction of the air return duct and is perpendicular to the air outlet direction of the exhaust air guide duct, the exhaust air guide duct is arranged in the air return duct, the exhaust air rate is controlled by controlling the air return valve, no exposed exhaust outlet exists, the labor cost is reduced, and the moisture removal control is more accurate; the heat exchanger is mounted at the exhaust outlet of the exhaust duct, so that heat of exhausted gas can be recovered, and energy waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco dryers, in particular to a distributed exhaust duct structure applied to tobacco dryers. Background Art

[0002] Tobacco, a key raw material for tobacco, belongs to the genus Nicotiana in the Solanaceae family. It is an annual or limited perennial herb. After harvesting, it needs to be dried by airing or baking before it can be processed into finished products. During the drying process, the tobacco dryer is connected to the tobacco flue-curing room through exhaust and return air ducts. However, the current exhaust duct structure is basically controlled externally and manually, which is not only difficult to control the exhaust volume, but also leads to high labor costs and poor control of moisture removal. Utility Model Content

[0003] In order to solve the defects of the prior art, the utility model provides a distributed exhaust duct structure applied to a tobacco dryer.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] The utility model discloses a distributed exhaust duct structure applied to a tobacco dryer, comprising an external unit component and an internal unit component, the internal unit component comprising an internal unit shell connected to the external unit component, a return air duct is provided at the top of the internal unit shell, an exhaust air duct is provided inside the return air duct, a return air valve is installed on the exhaust air duct, an air outlet direction of the return air valve is parallel to the return air direction of the return air duct and is perpendicular to the exhaust outlet direction of the exhaust air duct.

[0006] As a preferred technical solution of the present invention, a top panel is provided at the top of the return air duct.

[0007] As a preferred technical solution of the present invention, the top panel is provided with an air outlet connecting flange connected to the return air duct.

[0008] As a preferred technical solution of the present invention, the external machine assembly includes an external machine housing connected to the internal machine housing.

[0009] As a preferred technical solution of the present invention, a heat exchanger is installed inside the outer shell, and the heat exchanger is installed at the exhaust outlet of the exhaust air duct.

[0010] As a preferred technical solution of the present invention, three return air valves are provided.

[0011] The beneficial effects of the utility model are:

[0012] 1. This distributed exhaust duct structure used in tobacco dryers has an air outlet direction through the return air valve that is parallel to the return air direction of the return air duct and perpendicular to the exhaust outlet direction of the exhaust air duct. An exhaust air duct is provided inside the return air duct. The exhaust volume is controlled by controlling the return air valve. There is no exposed exhaust outlet, which reduces labor costs and makes dehumidification control more precise.

[0013] 2. This distributed exhaust duct structure used in the tobacco dryer can recover the exhaust gas heat and reduce energy waste by installing a heat exchanger at the exhaust outlet of the exhaust duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a structural schematic diagram of a distributed exhaust duct structure used in a tobacco dryer according to the present invention;

[0016] Figure 2 This is a structural cross-sectional view of a distributed exhaust duct structure used in a tobacco dryer according to the utility model;

[0017] Figure 3 The utility model is a top view of the structure of a distributed exhaust duct structure used in a tobacco dryer.

[0018] In the figure: 1. External unit assembly; 2. Internal unit assembly; 3. Internal unit casing; 4. Return air duct; 5. Exhaust air duct; 6. Return air valve; 7. Top panel; 8. Air outlet connection flange; 9. External unit casing; 10. Heat exchanger. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0020] Example: Figure 1 、 Figure 2 and Figure 3As shown, the utility model is a distributed exhaust duct structure used in a tobacco dryer, comprising an external unit component 1 and an internal unit component 2, the internal unit component 2 comprising an internal unit shell 3 connected to the external unit component 1, a return air duct 4 is provided at the top of the internal unit shell 3, an exhaust air duct 5 is provided inside the return air duct 4, a return air valve 6 is installed on the exhaust air duct 5, the air outlet direction of the return air valve 6 is parallel to the return air direction of the return air duct 4 and perpendicular to the exhaust air outlet direction of the exhaust air duct 5, the air outlet direction through the valve port of the return air valve 6 is parallel to the return air direction of the return air duct 4 and perpendicular to the exhaust air outlet direction of the exhaust air duct 5, the exhaust air duct 5 is provided inside the return air duct 4, the exhaust air volume is controlled by controlling the return air valve 6, there is no exposed exhaust outlet, the labor cost is reduced, and the dehumidification control is more precise.

[0021] The top of the return air duct 4 is provided with a top panel 7, and the top panel 7 is provided with an air outlet connecting flange 8 connected to the return air duct 4. The setting of the air outlet connecting flange 8 is convenient for connection with the tobacco curing room.

[0022] Among them, the external unit component 1 includes an external unit shell 9 connected to the internal unit shell 3, and a heat exchanger 10 is installed inside the external unit shell 9, and the heat exchanger 10 is installed at the exhaust outlet of the exhaust air duct 5. By installing the heat exchanger 10 at the exhaust outlet of the exhaust duct, the exhaust gas heat can be recovered to reduce energy waste.

[0023] There are three return air valves 6 .

[0024] During operation, the distributed exhaust duct structure applied to the tobacco dryer has the air outlet direction through the valve port of the return air valve 6 parallel to the return air direction of the return air duct 4 and perpendicular to the exhaust outlet direction of the exhaust air duct 5. The exhaust air duct 5 is provided inside the return air duct 4. The exhaust air volume is controlled by controlling the return air valve 6. There is no exposed exhaust outlet, which reduces labor costs and makes dehumidification control more precise.

[0025] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A distributed exhaust duct structure applied to a tobacco dryer, comprising an external unit component (1) and an internal unit component (2), wherein the internal unit component (2) comprises an internal unit housing (3) connected to the external unit component (1), characterized in that: The top of the inner housing (3) is provided with a return air duct (4), the interior of the return air duct (4) is provided with an exhaust air duct (5), and the exhaust air duct (5) is installed with a return air valve (6), the air outlet direction of the return air valve (6) is parallel to the return air direction of the return air duct (4) and perpendicular to the exhaust air outlet direction of the exhaust air duct (5).

2. The distributed exhaust duct structure used in a tobacco dryer according to claim 1, characterized in that: A top panel (7) is provided at the top end of the return air duct (4).

3. The distributed exhaust duct structure used in a tobacco dryer according to claim 2, characterized in that: The top panel (7) is provided with an air outlet connecting flange (8) which is connected to the return air duct (4).

4. The distributed exhaust duct structure used in a tobacco dryer according to claim 1, characterized in that: The external machine assembly (1) comprises an external machine housing (9) connected to the internal machine housing (3).

5. The distributed exhaust duct structure used in a tobacco dryer according to claim 4, characterized in that: A heat exchanger (10) is installed inside the outer casing (9), and the heat exchanger (10) is installed at the exhaust outlet of the exhaust air duct (5).

6. The distributed exhaust duct structure used in a tobacco dryer according to claim 1, characterized in that: The return air valves (6) are provided with three.

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