Bidirectional airflow baking device

Abstract

The invention discloses a bidirectional airflow baking device. According to the bidirectional airflow baking device, separation plates parallel to the inner wall of a box are arranged in the box, a separation layer is arranged on the rear portion of the box, a box door is formed on the box, and a heat pump system outer machine is connected with the box through a work medium pipeline; an upper dehumidification evaporator and a lower dehumidification evaporator are communicated through heat preservation pipelines in the separation layer, are obliquely arranged and are oppositely located at the top end and the bottom end of a heat pump air return air channel, airflow is sucked into pipeline fans in the heat preservation pipelines and distributed to the two dehumidification evaporators for dehumidification; a main condenser is arranged in the center of the separation layer and connected with a heat pump system, and the main condenser is used for carrying out heat exchange and temperature rise on the airflow in the airflow circulation process; an upward heater and a downward heater are arranged at the top ends and the bottom ends of the opposite separation plates on the rear portion of the box; a heat storage water tank is connected with a water source pipeline and connected with a box pipeline; a steam generator is connected with a steam pipeline of the box and is connected with a water pipe of the heat storage water tank, water in the heat storage water tank is converted into steam by the steam generator, and the steam is conveyed into the box.

Description

technical field [0001] The invention belongs to the technical field of drying, and in particular relates to a two-way airflow baking device, which is used for baking daily materials, and is especially suitable for experimental research on material baking technology. Background technique [0002] Many primary agricultural products or other different types of materials need to go through the primary process of roasting. The quality of the roasting process directly affects the production efficiency. For example, the initial roasting of tobacco leaves, etc. The roasting process of different types of materials is also diverse. Strengthen research The optimal baking process for specific materials has a great guiding effect on improving the baking quality. During the baking process, the temperature and humidity control requirements are very strict. Different stages have different requirements for temperature and humidity. While evaporating water, it is necessary to retain the aroma...

AI Technical Summary

Problems solved by technology

[0003] At present, there are various structural forms of ovens on the market. For hot air circulation ovens that adopt vertical airflow, the airflow direction is fixed and single, and either can only provide ascending airflow, or can only provide descending airflow, and For the baked materials in the box, the air flow direction is one of the important factors affecting the baking quality. A single air flow direction is not conducive to the balanced and simultaneous drying of the baked materials themselves, and is also not conducive to the realization of the temperature flow field in the oven. The uniformity control of the distribution can easily lead to local over-drying and local under-drying, which will have a great impact on the baking quality

[0004] In addition, the heating of existing ovens mostly uses simple electric heating for hot air circulation. When the baking temperature is high, it is difficult to meet the temperature rise requirement completely by the heat pump condenser.

The air source heat pump is greatly affected by the temperature of the external environment, and most of the air circulation is open or partially depleted semi-open, and the heat supply and heat load are prone to mismatch when dehumidifying and ventilating; the temperature control method adopts The way of stopping and starting the heat pump system causes large fluctuations in temperature and humidity inside the box, which is not conducive to the stability of baking data, and frequent stopping and starting has a great impact on the power grid, which will also have a negative impact on the reliability of system equipment

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