Air conditioning device capable of treating air heat and humidity load and producing cold water or hot water simultaneously

Abstract

The invention relates to the technical field of air conditioning devices in civil and industrial projects, in particular to an air conditioning device capable of treating air heat and humidity load and producing cold water or hot water simultaneously. The air conditioning device comprises a cold or heat source unit and an air heat and humidity treatment unit; the cold or heat source unit is used for treating the air heat and humidity load to provide cold flow or heat flow and producing cold water or hot water delivered to the outside simultaneously; the air heat and humidity treatment unit can perform cooling and dehumidification or heating and humidification on air; the cold or heat source unit comprises a compressor, an expansion valve and a cooling agent circulating pipeline, the cooling agent circulating pipe comprises a first main pipeline, a second main pipeline, a third main pipeline and a fourth main pipeline, the first main pipeline is connected with the air heat and humidity treatment unit through a first cooling agent input branch, the air heat and humidity treatment unit is connected with the input end of the compressor through the second main pipeline, and the first main pipeline is connected with a cold or hot water input end of an in-out unit through a second cooling agent input branch, and used for cooling or heating cold or hot water of the in-out unit.

Description

technical field [0001] The invention relates to the technical field of air-conditioning devices in civil and industrial projects, in particular to an air-conditioning device that can handle air heat and humidity loads and simultaneously prepare cold water or hot water. Background technique [0002] At present, energy saving and emission reduction and building a resource-saving society have become a very important task at present. Building energy consumption accounts for about 30% of the total energy consumption of the whole society, and the energy consumption of air-conditioning systems accounts for 40-40% of the total energy consumption of buildings. 60%, therefore, reducing the energy consumption of the central air-conditioning system has become an important direction of my country's energy saving and emission reduction. [0003] In the current central air-conditioning system, the refrigeration (heating) unit and the air-conditioning unit are independently installed equipme...

AI Technical Summary

Problems solved by technology

The above-mentioned air-conditioning system structure is relatively mature, but in terms of system energy saving, there have been three insurmountable shortcomings as follows: 1. Complicated and long-distance multiple pipeline connections are required between the refrigeration (heating) unit and the terminal air-conditioning unit , need to consume a lot of transmission and distribution energy consumption (accounting for about 20-35% of the energy consumption of the air conditioning system); Good adaptation to local air-conditioning (heating) demand conditions, resulting in inefficient operation of air-conditioning equipment (cold and heat source equipment, circulation pumps, etc.) It is difficult to adjust the flow distribution of air-conditioning partitions, because the amount of cold (hot) water required by each air-conditioning partition is not only different at the design point, but also different in part-load operation, and it changes in real time; 4. The control system needs to manage and Coordinating refrigeration equipment, heating equipment, circulating pumps, terminal equipment (fresh air unit + fan coil unit, or combined air conditioning box), etc., the design, construction, management and use of the control system are very complicated

In the current central air-conditioning system, the refrigeration (heating) unit and the air-conditioning unit are independently installed equipment. In terms of project cost, construction and operation management, there are also the following two shortcomings: 1. The refrigeration (heating) unit must Equipped with a refrigeration room, which generally takes up 2-4% of the construction area (civil construction cost); 2. Complex, long-distance multiple pipeline connections are required between the refrigeration (heating) unit and the terminal air-conditioning unit, and reservation is required The pipeline space is complicated to construct and takes a long construction period. The equipment, materials and construction costs of this part of the pipeline system account for about 6-9% of the total cost of the air conditioning system; 3. In actual operation, the property management team needs to manage and Regulating cold and heat source equipment, transmission and distribution system (circulation pump, flow distribution), air conditioning unit and other terminals, operation management is complex and costly

However, this unit can only cool down the fresh air (cannot dehumidify, cannot heat), can only provide air-conditioning cold water, cannot provide hot water, and the principle of the unit can only be used in dry climate areas, not in non-dry climates Area (that is, the unit cannot be used in more than 60% of the country's land area)

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