A microwave-hot air combined drying equipment for rose tea

Abstract

The utility model relates to rose tea field especially a kind of microwave hot air combined drying equipment for rose tea.This equipment includes automatic feeding device, microwave drying device and hot air circulation device;Microwave drying device and hot air circulation device are respectively arranged in the upper portion and lower portion of shell;Automatic feeding device includes the conveyer belt of inclination setting in the front part of shell, and the surface of conveyer belt is uniformly distributed with guide rough surface;Microwave drying device and hot air circulation device form drying cavity between, and drying cavity is equipped with conveyer mesh belt inside by support, and microwave generator is installed in the top of drying cavity;The device generates electromagnetic field by microwave generator, so that the water molecules in rose tea quickly vibrate to generate heat, realize rapid heating;Hot air circulation device forms annular hot air passage by fan chamber, return air duct, electric heater and temperature controller, and continuously provides uniform hot air for drying cavity.

Description

Technical Field

[0001] This utility model relates to the field of drying, and in particular to a microwave hot air combined drying device for rose tea. Background Technology

[0002] Rose tea is typically made from edible roses through drying methods, including hot air drying, natural sun-drying, and microwave drying. Hot air drying relies on slow heat transfer from external hot air, which, while preserving the petals' shape, has low drying efficiency and prolonged heating can lead to loss of active ingredients and shrinkage / deformation of the petals. Microwave drying, while achieving rapid heating through molecular polarity vibrations, can cause localized overheating due to uneven electromagnetic field distribution, resulting in scorched or undercooked petals. Furthermore, the high temperature accelerates the dissipation of volatile aromas, affecting the flavor of the finished product.

[0003] Therefore, in existing technologies, neither hot air nor microwave drying alone can achieve both efficiency and quality. Hot air drying is limited by its heat transfer rate, making it difficult to overcome the bottleneck in drying efficiency, while microwave drying, although significantly faster, suffers from inconsistent quality due to insufficient uniformity. Utility Model Content

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model provides a microwave and hot air combined drying equipment for rose tea, including an automatic feeding device, a microwave drying device, and a hot air circulation device; the microwave drying device and the hot air circulation device are respectively arranged in the upper and lower parts of the shell;

[0006] The automatic feeding device includes a conveyor belt that is inclinedly arranged at the front of the housing, and the surface of the conveyor belt is uniformly distributed with guide rough surfaces.

[0007] A drying chamber is formed between the microwave drying device and the hot air circulation device. A conveyor belt is installed inside the drying chamber via a support, and a microwave generator is installed on the top of the drying chamber.

[0008] The hot air circulation device includes a fan chamber, a return air duct, an electric heater, and a temperature controller. The return air duct connects the drying chamber and the fan chamber, forming an annular channel within the housing.

[0009] Furthermore, the conveyor belt is a woven mesh, and the conveyor belt is provided with partition plates.

[0010] Furthermore, the drying chamber is provided with an observation window and an emergency dehumidification valve on its side wall, and the emergency dehumidification valve is connected to the top of the side of the drying chamber through a dehumidification pipe.

[0011] Furthermore, a humidity sensor is installed on the top of the drying chamber.

[0012] The beneficial effects of this utility model are as follows:

[0013] This device uses a microwave generator to create an electromagnetic field, causing water molecules in the rose tea to vibrate rapidly and generate heat, thus achieving rapid heating. A hot air circulation system, consisting of a fan chamber, return air duct, electric heater, and temperature controller, forms a ring-shaped hot air channel, continuously providing uniform hot air to the drying chamber. Microwaves solve the problem of rapid heating, while hot air ensures uniform heating, overcoming the efficiency bottleneck of single drying methods. This also reduces the loss and deformation of active ingredients in the petals, preserving the flavor of the finished product.

[0014] The conveyor belt uses a woven mesh structure, which facilitates the penetration of hot air and microwaves, ensuring that the rose tea is heated and dried evenly. Dividers separate the rose tea leaves, preventing them from piling up and further guaranteeing uniform drying.

[0015] The conveyor belt, which is inclined at the front of the housing, has a uniformly distributed guide rough surface, which can automatically transport rose tea to the drying chamber, reducing manual operation and improving production efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a side view of the structure of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1-Shell; 2-Conveyor belt; 3-Guide rough surface; 4-Drying chamber; 5-Support; 6-Conveyor mesh belt; 7-Microwave generator; 8-Hot air circulation device; 9-Divider plate; 10-Observation window; 11-Emergency dehumidification valve; 12-Dehumidification pipe. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] This utility model provides a microwave and hot air combined drying device for rose tea, including an automatic feeding device, a microwave drying device, and a hot air circulation device. The microwave drying device and the hot air circulation device are respectively disposed in the upper and lower parts of the housing 1. The automatic feeding device includes a conveyor belt 2 inclined at the front of the housing 1. The surface of the conveyor belt 2 is uniformly distributed with guide rough surfaces 3, which prevent the rose tea from slipping due to inertia during the conveying process by friction, ensuring uniform feeding. At the same time, it provides a preliminary dispersion effect for subsequent microwave preheating. A drying cavity 4 is formed between the microwave drying device and the hot air circulation device 8. The interior of the drying cavity 4 is open to... A conveyor belt 6 is installed through the support 5, and a microwave generator 7 is installed on the top of the drying chamber 4. The rose tea generates heat through high-speed vibration and friction under the action of the electromagnetic field, achieving rapid heating from the inside out. The hot air circulation device includes a fan chamber, a return air duct, an electric heater, and a temperature controller. The return air duct connects the drying chamber 4 and the fan chamber, forming an annular channel inside the shell 1. The fan chamber draws air from the drying chamber 4, which is heated by the electric heater to form a directional hot air flow. The temperature controller regulates the power of the electric heater. The annular return air duct allows the hot air to penetrate the conveyor belt 6 multiple times, utilizing residual heat to improve energy efficiency, while avoiding excessive temperature gradients within the chamber.

[0022] The conveyor belt 6 is a woven mesh to ensure microwave penetration while allowing hot air to penetrate the material layer vertically. A partition plate 9 is installed on the conveyor belt 6 to separate the rose tea leaves. The drying chamber 4 has an observation window 10 and an emergency dehumidification valve 11 on its side wall. The emergency dehumidification valve 11 is connected to the top of the side of the drying chamber 4 via a dehumidification pipe 12. A humidity sensor is installed at the top of the drying chamber 4 to detect changes in the dielectric constant of the air inside the chamber and provide real-time humidity data. Furthermore, the control system adjusts the hot air temperature and microwave power in conjunction with the system. When the humidity sensor detects that the relative humidity inside the chamber reaches a certain value, the emergency dehumidification valve 11 automatically opens, quickly expelling the high-humidity air through the dehumidification pipe 12 to prevent condensation from affecting the drying efficiency.

[0023] Through the above specific embodiments, those skilled in the art can easily implement this utility model. However, it should be understood that this utility model is not limited to the specific embodiments described above. Based on the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

Claims

1. A microwave hot air combined drying device for rose tea, characterized in that: It includes an automatic feeding device, a microwave drying device, and a hot air circulation device; the microwave drying device and the hot air circulation device are respectively located in the upper and lower parts of the housing (1); The automatic feeding device includes a conveyor belt (2) inclinedly arranged at the front of the housing (1), and the surface of the conveyor belt (2) is uniformly distributed with guide rough surfaces (3). A drying cavity (4) is formed between the microwave drying device and the hot air circulation device (8). A conveyor belt (6) is provided inside the drying cavity (4) through a support (5). A microwave generator (7) is installed on the top of the drying cavity (4). The hot air circulation device includes a fan chamber, a return air duct, an electric heater and a temperature controller. The return air duct connects the drying chamber (4) and the fan chamber, forming an annular channel within the housing (1).

2. The microwave hot air combined drying equipment according to claim 1, characterized in that: The conveyor belt (6) is a woven mesh, and a partition plate (9) is provided on the conveyor belt (6).

3. The microwave hot air combined drying equipment according to claim 1, characterized in that: The drying chamber (4) has an observation window (10) and an emergency dehumidification valve (11) on its side wall. The emergency dehumidification valve (11) is connected to the top of the side of the drying chamber (4) through a dehumidification pipe (12).

4. The microwave hot air combined drying equipment according to claim 1, characterized in that: A humidity sensor is installed on the top of the drying chamber (4).

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