Pre-cooling energy-saving dehumidifying system and method

Abstract

The invention discloses a pre-cooling energy-saving dehumidifying system and method, and belongs to the field of air conditioners. The dehumidifying system comprises a shell and a dehumidifying unit arranged in the shell. The dehumidifying unit is provided with a compressor, a water-cooled condenser, an air-cooled condenser, an expansion valve, a surface air cooler and an air-air plate heat exchanger. A first refrigerating medium circulating circuit is arranged among the compressor, the water-cooled condenser, the expansion valve and the surface air cooler. A second refrigerating medium circulating circuit is arranged among the compressor, the air-cooled condenser, the expansion valve and the surface air cooler. A first cooling water circulating circuit is arranged between the water-cooled condenser and an external cooling water system. Indoor air sequentially flows through the air-air plate heat exchanger, the surface air cooler, the air-air plate heat exchanger and the air-cooled condenser and is then sent into an air dehumidifying channel arranged indoors. The dehumidifying system has the advantages of being simple in structure, low in energy consumption and high in stability; the dehumidifying method corresponding to the dehumidifying system has the advantages of being easy to implement and flexible to control.

Description

technical field [0001] The invention relates to a dehumidification system and a dehumidification method in the field of air conditioning, in particular to a heat pump refrigeration dehumidification system with a precooling function and a dehumidification method thereof. Background technique [0002] In the field of air conditioning, air dehumidification is one of the important procedures. Traditional refrigerated dehumidifiers mainly use the principle of compression refrigeration to cool the air and remove water vapor to achieve the purpose of dehumidification. However, the dehumidification load in this dehumidification method is borne by the refrigeration system, resulting in a low dehumidification capacity per unit electric energy of the overall unit and a single function. Based on this situation, those skilled in the art have researched and developed a fresh air dehumidifier with two systems, such as CN1699855, which is provided with a casing and an evaporator, an air-co...

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Problems solved by technology

[0004] In order to solve the technical problems of low dehumidification capacity per unit electric energy, single function, and waste of energy in the prior art, the present invention provides a pre-cooling energy-saving dehumidification system, which includes a housing and a dehumidification unit arranged in the housing. The unit is equipped with a compressor, a water-cooled condenser, an air-cooled condenser, an expansion valve, a surface cooler and an air-gas plate heat exchanger; a first refrigerant is installed between the compressor, water-cooled condenser, expansion valve and the surface cooler Circulation circuit, there is a second refrigerant circulation circuit between the compressor, air-cooled condenser, expansion valve and surface cooler, the first refrigerant circulation circuit and the second refrigerant circulation circuit are in normal mode and energy-saving mode Alternately run from bottom to bottom; there is a first cooling water circulation loop between the water-cooled condenser and the external cooling water system; the indoor air flows through the air-air plate heat exchanger, surface cooler, air-air plate heat exchanger, and air-cooled condenser in sequence The passage into the room is provided with an air dehumidification duct, and a fan is provided at the entrance of the air dehumidification duct

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