Dehumidifying and drying machine with homogenized temperature and humidity of air outlet section of condenser

Abstract

The invention discloses a dehumidifying and drying machine with homogenized temperature and humidity of an air outlet section of a condenser. The machine comprises a shell body which is provided withan air outlet and an air inlet, a first fan is arranged at the air outlet, and at least one set of dehumidification system is arranged in the shell body; the dehumidification system comprises a compressor, the condenser, a throttling device and an evaporator, wherein the compressor, the condenser, the throttling device and the evaporator are sequentially connected to form a loop for refrigerant circulation; and a cross-flow heat exchanger is arranged on one side of the evaporator, inlet air and outlet air of the evaporator pass through a hot fluid channel and a cold fluid channel of the cross-flow heat exchanger respectively, a second fan is arranged at the air outlet position of the top of the cross-flow heat exchanger, so that an air inlet pre-cooling efficient dehumidification uniform air distribution module is formed. According to the machine, wet air enters the shell body, part of the wet air sequentially flows through the hot fluid channel of the cross-flow heat exchanger, the evaporator and the cold fluid channel of the cross-flow heat exchanger to be changed into dry air, then the dry air is mixed uniformly with the other part of the wet air directly from the air inlet under the action of the second fan, and then the mixed air flows through the condenser to be heated and finally discharged out of the air outlet.

Description

technical field [0001] The invention relates to the technical field of dehumidification device design, in particular to a dehumidification dryer for uniform temperature and humidity of the air outlet section of a condenser. Background technique [0002] In an ordinary heat pump drying room, due to the low air velocity in the upper and lower air bag of the drying room and in the heat pump unit, generally below 10m / s, the Reynolds number for judging the flow state of the airflow is only 10 2 The order of magnitude is far lower than the critical value of turbulent flow (the lower limit of turbulent Reynolds number) of 3000. The airflow is in a laminar flow state. On the transverse section perpendicular to the flow direction of the airflow, the lateral diffusion ability of gas molecules is very weak and it is difficult to fully mix. , It is difficult to achieve the uniformity of temperature and humidity on the airflow transverse section; [0003] Because there may be inhomogene...

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Problems solved by technology

[0002] In an ordinary heat pump drying room, due to the low air velocity in the upper and lower air bag of the drying room and in the heat pump unit, generally below 10m / s, the Reynolds number for judging the flow state of the airflow is only 10 2 The order of magnitude is far lower than the critical value of turbulent flow (the lower limit of turbulent Reynolds number) of 3000. The airflow is in a laminar flow state. On the transverse section perpendicular to the flow direction of the airflow, the lateral diffusion ability of gas molecules is very weak and it is difficult to fully mix. , It is difficult to achieve the uniformity of temperature and humidity on the airflow transverse section;

[0003] Because there may be inhomogeneity in temperature and humidity in the air intake of the condenser, for example, part of the intake air flow may have been cooled and dehumidified by the evaporator, and the temperature and absolute humidity content are relatively low, while another part of the intake air flow may be directly The warm and humid return air from the drying room has not been cooled and dehumidified by the evaporator, and its temperature and absolute moisture content are relatively high; In the process of condenser heating and condenser fan suction, pressure boosting and discharge, due to the short distance and low Reynolds number, it is impossible to fully mix the temperature and humidity; in the airflow output by the condenser fan, the temperature and absolute humidity are high The air stream, and the air stream with low temperature and absolute moisture content, although there is a small amount of mixing, the boundaries of the respective air streams are still clear and distinct, enveloping each other, intertwining each other, flowing to the distance, and passing through their respective relatively fixed areas of the dried medium ,,,,,,

[0004] It is difficult to fully mix the air out of the condenser, and the unevenness of temperature and humidity on the airflow section of the condenser air outlet brings uneven drying of wet materials: some wet materials have been dried, and some wet materials The moisture in the water still exceeds the standard, and even mildew and rancidity appear; the inhomogeneity of temperature and humidity on the airflow section of the condenser, and the drying process with high process requirements, such as the drying process of tobacco leaves and Chinese herbal medicines, have brought serious technical problems. question.

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