The dehumidifier is a small member of the refrigeration and air conditioning family. At present, the main production areas of global dehumidifiers are concentrated in Italy, Japan and Taiwan, and China's position in the global dehumidifier market is not significant. In particular, household dehumidifiers have always been export-oriented, but have just been recognized by Chinese consumers. Dehumidifier products can be divided into two categories: household dehumidifiers and industrial dehumidifiers. In the industry, industrial dehumidifiers are subdivided into civil and industrial categories. The working principle of the dehumidifier is simply to use the moisture in the air to condense and frost when entering the dehumidifier evaporator, and then accumulate and drip out, and discharge into the water outlet, thereby achieving the purpose of reducing the humidity of the space. The principle is similar to the dehumidification principle in the air conditioner cooling mode. The difference between the working mode of the air conditioner and the dehumidifier is compared with the independent dehumidification mode. As the basic function of the air conditioner, the cooling mode has lower requirements on the structural design and control mode of the air conditioner, and the cost is low, but in this way, the purpose of dehumidification is achieved. At the same time, it will inevitably cause the room temperature to drop, which is not practical and wastes power when the temperature is not high. In fact, the dehumidification function in the cooling mode is only a by-product, and does not increase the cost of the air conditioner. The independent dehumidification mode uses electric heating or heat exchange to heat the air outlet. The control will be more complicated and the design cost is higher. However, this temperature compensation will make the room temperature fluctuation relatively small, suitable for the temperature is not high, but the humidity is too high. Used when. The air conditioner operates in these two independent dehumidification modes, and its refrigeration system is in an efficient operation state, and the operating conditions of the evaporator and the condenser are relatively reasonable, and the energy efficiency ratio is high. The dehumidifier works by cooling the inside of the machine and analyzing the water in the air. The temperature of the space will rise slightly, but the temperature difference is not obvious. It is more suitable for the wet season outside the summer, and the electricity consumption is relatively low. 1. Cooling dehumidifier: 1.1 According to the use of function points, can be divided into: general type, cooling type, temperature adjustment type, multi-function type. The general type dehumidifier means that the air is cooled and dehumidified by the evaporator, and is heated by the reheater to reduce the relative humidity. The condensation heat of the refrigerant is completely carried away by the air flowing through the reheater, and the outlet air temperature cannot be adjusted. Dehumidifier for heating and dehumidification. The cooling type dehumidifier means that on the basis of the general type dehumidifier, the condensation heat of the refrigerant is mostly carried away by the water-cooled or air-cooled condenser, and only a small part of the condensation heat is used to heat the air passing through the evaporator, which can be used for cooling. Dehumidifying dehumidifier. The temperature-regulating dehumidifier means that on the basis of the general type dehumidifier, the condensation heat of the refrigerant can be taken away in whole or in part by the water-cooled or air-cooled condenser, and the remaining condensation heat is used to heat the air passing through the evaporator. Dehumidifiers with adjustable wind temperature. The multi-functional dehumidifier refers to a dehumidifier that integrates three functions of temperature rise and dehumidification (general type), temperature drop dehumidification, temperature adjustment and dehumidification. In the absence of outdoor unit (air cooling) or cooling water (water cooling), temperature rise and dehumidification can be selected. A dehumidifier that functions to dehumidify. 1.2 According to the presence or absence of the fan, it can be divided into: conventional dehumidifier, air duct dehumidifier. 1.3 According to the structure, it can be divided into: integral, split, and overall mobile. 1.4 According to the applicable temperature range, it can be divided into: type A (common type 18~38 °C), type B (low temperature type 5~38 °C). 1.5 According to the method of returning the wind, it can be divided into: the hood with the hood and the hood with the back. 1.6 According to the control form, it can be divided into: automatic type and non-automatic type. 1.7 According to the special use situation, there are new wind type, explosion-proof type and so on. 2. Runner remove (suction) wet machine The main structure of the rotary dehumidifier is a continuously rotating honeycomb drying wheel. The drying wheel is a key component for moisture absorption in the dehumidifier. It is composed of a corrugated medium made of a special composite heat-resistant material. The corrugated medium carries a moisture absorbent. This design is compact and provides a large surface area for adequate contact between wet air and moisture absorbing media. Thereby, the dehumidification efficiency of the dehumidifier is greatly improved. 3. Solution (suction) wet machine The solution dehumidification air conditioning system is based on an active dehumidification air treatment technology that uses a dehumidifying solution as a moisture absorbent to adjust the air humidity and a water as a refrigerant to adjust the air temperature. The core air conditioning product can provide a new wind operation condition; The physical properties of the agent, through the innovative solution dehumidification and regeneration method, to achieve efficient dehumidification above the dew point temperature. The system temperature and humidity adjustment is carried out completely in a normal-pressure open atmosphere. It has the technical features of simple manufacturing, reliable operation, energy saving and high efficiency. The system is mainly composed of four basic modules. They are the air supply (new air and return air) module, the humidity adjustment module, the temperature adjustment module and the solution regenerator module.