Integral units of air conditioner condensation heat reclamation and free cold supply of cooling column and applied system

Abstract

The invention discloses an integration unit for recovering the heat of liquefaction of an air conditioner and free cooling by a cooling tower and an applied air-conditioning system thereof. The invention comprises a controller and a heat interchanger which is provided with a first medium flow passage and a second medium flow passage; the integration unit unifies a recovery system of the heat of liquefaction of the air conditioner and a free cooling system of the cooling tower into a whole by the heat interchanger, a first lateral flow pipe and a second lateral flow pipe thereof, a valve and acircumscribed interface; the switch of the working conditions between the recovery of the heat of liquefaction of the air conditioner and the free cooling of the cooling tower in different time periods is realized by controlling the valve, and an outdoor temperature sensor is connected with the controller by a signal line, thereby leading the heat interchanger to have a dual functions of the recovery of the heat of liquefaction and the free cooling and heat changing of the cooling. The invention integrates the recovery of the heat of liquefaction of the air conditioner and the free cooling ofthe cooling tower, and the integration unit can realize the dual functions of he recovery of the heat of liquefaction and the free cooling of the cooling tower in a whole year; the equipment has highutilization ratio and low depreciation expense; the manual or automatic switch of the working conditions of recovery of the heat of liquefaction of the air conditioner and the free cooling of the cooling tower can be realized; the integration unit is controlled flexibly and simply.

Description

technical field [0001] The invention belongs to building energy-saving application technology, and is applicable to commercial and public building air-conditioning application occasions that require domestic hot water supply all year round, in particular to an air-conditioning condensation heat recovery and cooling tower free cooling integrated unit and its application system. Background technique [0002] Star-rated hotels and guesthouses are equipped with central air-conditioning systems and 24-hour hot water supply. Generally, cold and heat sources are set separately, that is, chillers are used as cold sources to realize air-conditioning cooling, and steam or hot water boilers are used as heat sources. hot water. According to the principle of refrigeration, the chiller needs to discharge a large amount of condensation heat to the environment through cooling water or air when it is operating under refrigeration conditions. Usually, the condensation heat discharged can reac...

AI Technical Summary

Problems solved by technology

In the existing two free cooling systems of cooling towers, because the system operates in a seasonal (i.e. transitional season) short-term operation mode, in the indirect cooling system, the utilization rate of its heat exchange equipment is low , the equipment cannot be fully utilized, and it is idle for most of the year, which increases the depreciation cost of the equipment; and in the direct connection system, the water quality of the open system on the side of the cooling tower is poor, which may easily cause blockage of air-conditioning terminal equipment and Scaling affects the heat transfer effect of air conditioning terminal equipment

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