Because the model and function of each dryer will be different, so when buying a dryer, we should also be optimistic about the various parameters or model selection to see if it meets our needs, then how should we choose the dryer? What?

1. Look at the nameplate of the dryer. Different drying temperatures require different models.

When customers choose a dryer, they usually conduct field inspections on the product. The nameplate of the dryer is an important basis for their choice. The type of dryer will be displayed on it, and then they can be found according to their own drying needs. Suitable type. Heat pump dryers are divided into low temperature heat pumps, medium temperature heat pumps, high temperature heat pumps, and ultra-high temperature heat pumps according to the drying temperature range. The temperature of the drying room supplied by different heat pumps ranges from 10°C to 90°C.

Second, depending on the heating capacity, choose a drying method suitable for the material.

Heat pump dryers are divided into open-loop heat pumps, closed-loop heat pumps, open-loop heat pumps with heat recovery, and closed-loop heat pumps with external evaporator (dual energy) according to the source of their heat. The characteristics are as follows: Open-loop heat pumps refer to the external machine from the ambient air Absorbing energy, the internal machine releases energy in the drying room, heating the wet material, turning the moisture of the material into a gaseous state, and draining it out of the board room, heating up faster. Closed-loop heat pump means that the evaporator and condenser of the heat pump are placed in the drying room. The energy comes from the power consumption in the drying room and is recycled in the drying room. The water vapor in the drying room is removed through the evaporator. The condensed water is discharged from the board room, thereby reducing the relative humidity, raising (or lowering) the temperature of the material, and achieving the purpose of rapid drying. The open-loop heat recovery heat pump means that the hot air in the dehumidifying part is recycled to the drying room or blown to the evaporator of the outdoor machine, thereby reducing heat loss or providing the temperature of the evaporator, effectively solving the disadvantages of the open-loop heat pump. In the case of low ambient temperature, the compressor is equipped with thermal insulation cotton and electric heating belt to provide energy efficiency ratio. The closed-loop external evaporator (dual energy) heat pump means that in addition to the electric heating to assist the temperature rise, an external evaporator can also be installed. Like an open-loop heat pump, the energy in the ambient air is sent to the drying room to achieve rapid heating. purpose.

According to its structure, heat pump dryers can be divided into all-in-one with drying room, embedded all-in-one, split machine, etc. The choice of which should be combined with the convenience of transportation, the size of the drying space and what type of drying is required equipment.

3. Look at the performance parameter table and find a dryer that meets the requirements

After the user selects the type of dryer, the next step is to determine the dryer unit based on its performance. There will be parameters such as model, heating capacity, voltage, current, etc. on the nameplate of the drying unit. If you want to obtain more detailed product performance parameters, you must carefully read the parameter table provided by the manufacturer. Different brands and different products have very different performance parameters. The performance parameter table considers the following points:

First, refer to the dryer model and applicable power supply. Units with different powers have corresponding requirements for power supply. Generally, 1P machines use 220V voltage, and 3P, 5P and above use 380V power supplies. Of course, there are also 5P machines under special circumstances. The 220V power supply must be specially made.

The second is the working environment temperature. Since heat pump drying is the same as heating and hot water, the operation and energy efficiency ratio of the unit will be affected by the ambient temperature. Therefore, it is necessary to choose suitable working conditions according to the season, temperature and time required for material drying. For the unit, make full use of the heat pump dryer as much as possible.

The third is the heating capacity, the amount of moisture removal and the amount of dehydration, which are the factors that affect the drying quality and energy consumption of the material. Therefore, the user should have a detailed understanding of the drying properties and drying capacity of the material to determine the drying requirements. Before the selection of the drying unit, the heating capacity must meet the heat load during the drying process of the material (including the heat absorbed by the material, the heat added to the fresh air after dehumidification, the heat dissipation of the components of the drying room and the heat absorbed by the evaporation of the moisture of the wet material ). For example, to dry a furnace of 4000 kg of wet materials, the dehydration rate is 30%, then the total dehydration amount is 1200 kg, and the drying time is 24 hours, then a dryer or several dryers with an hourly dehydration capacity of more than 25 kg should be selected. A drying unit with a total dehydration volume exceeding 25 kg per hour.

The last is the rated temperature. Because different materials require different drying temperatures, the temperature requirements of more products are constantly changing during the drying process, and a higher temperature is required in a special stage, so the drying unit The rated temperature must be greater than or equal to the highest temperature requirement for material drying. In addition, it is also necessary to understand the noise, external dimensions, compressor, refrigerant, material occupied space, control system and other parameters of the unit.

The above is the way everyone in our industry shares how to choose a dryer. I hope to help you.