Chillers, working methods and refrigerants used in the field of air conditioning and refrigeration

Abstract

The invention discloses a water chiller unit for the air-conditioner refrigeration field. The water chiller unit comprises a compressor, a condenser, a liquid reservoir, a drying filter, a liquid mirror, an electronic expansion valve, a first casing type evaporator, a second casing type evaporator, an adjusting valve, a cooling water pump, a first chilled water pump, a second chilled water pump, a three-way valve and refrigerant. The outlet end of the electronic expansion valve is connected with the first inlet end of the first casing type evaporator, the first outlet end of the first casing type evaporator, the first inlet end of the second casing type evaporator and the outlet end of the electronic expansion valve are connected with three orifices of the three-way valve respectively. The water chiller unit solves the problems that an existing one-off cooling and dehumidifying air conditioner is low in evaporation temperature, air supply humidity is difficult to accurately control, energy efficiency ratio of a refrigerating unit is hard to increase. Meanwhile, the invention further provides an operating method of the water chiller unit, and two kinds of chilled water different in temperature are effectively provided. Further, the invention provides the refrigerant. Performance of a heat and humidity segment treatment system can be improved.

Description

technical field [0001] The invention belongs to the field of refrigeration and air-conditioning systems, and in particular relates to a water chiller, working method and refrigerant used in the field of air-conditioning and refrigeration. [0002] technical background [0003] The air conditioning load can be divided into sensible heat load and humidity load (latent heat load). The humidity load treatment methods in the air treatment process mainly include cooling and dehumidification, solution dehumidification, adsorption dehumidification, etc. Restricted by various factors, cooling and dehumidification is still the most commonly used method to deal with the humidity load of air conditioners. [0004] The method of cooling and dehumidification is to use cold water at a lower temperature to perform one-time cooling and dehumidification treatment on the air, and process it to the required saturation state, and then heat the air to the air supply state by heating. In this way,...

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Problems solved by technology

[0005] Technical problem: The technical problem to be solved by the present invention is to provide a water chiller used in the field of air-conditioning and refrigeration, which solves the problems of low evaporation temperature and difficulty in accurately controlling the humidity of the air supply in the existing one-time cooling and dehumidification air-conditioning devices. , The problem that the energy efficiency ratio of the refrigeration unit is difficult to improve, and also solve the problem of using a set of chillers in the hot-humidity segmental treatment system instead of the original system, and two sets of chillers to produce chilled water at two temperatures

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