Air-cooling water chiller

Abstract

The invention discloses an air-cooling water chiller comprising a compressor, an air-cooling condenser, a liquid storage tank, a hydraulic filling type evaporator, an expansion valve and a water chiller control system, wherein a liquid level meter is installed on the liquid storage tank, and a liquid level signal of the liquid level meter is input to the water chiller control system and is linked with the expansion valve for controlling the circulation quantity of a refrigerant. The liquid level meter is installed on the liquid storage tank, and an electric signal of the liquid level meter is linked with the expansion valve to control the circulation quantity of the refrigerant so as to meet different load demands of users and greatly improve the energy efficiency of part of loads; a supercooler is added in the water chiller to perform supercooling treatment on the refrigerant entering the hydraulic filling type evaporator so as to further improve the energy efficiency; and the refrigerant in the liquid storage tank is connected with a liquid jet opening of the compressor to guarantee complete supercooling of a liquid jet pipe of the compressor so as to guarantee the normal work of the compressor. Compared with the prior art, the water chiller has the advantages of having a simple structure, a low manufacturing cost and convenience for installation, accurately controlling the circulation quantity of the refrigerant, guaranteeing the normal work of the compressor and prolonging the service life of the whole water chiller.

Description

technical field [0001] The invention relates to a refrigeration equipment, in particular to an air-cooled chiller. Background technique [0002] The air-cooled chiller is a main central cold source equipment of the central air-conditioning system. It is generally suitable for summer refrigeration. The conventional refrigeration method is compressor-type mechanical refrigeration. The basic principle of the refrigeration system of the air-cooled chiller: after the liquid refrigerant absorbs the heat of the cooled object in the evaporator, it is vaporized into low-temperature and low-pressure steam. In the condenser, heat is released to the cooling medium (water or air), condensed into a high-pressure liquid, throttled by a throttle valve to a low-temperature and low-pressure refrigerant, and then enters the evaporator again to absorb heat and vaporize to achieve the purpose of circulating refrigeration. In this way, the refrigerant goes through four basic processes of evapora...

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Problems solved by technology

[0008] At present, because the energy efficiency of the flooded evaporator is higher than that of the dry evaporator, the flooded evaporator is widely used, but the flooded evaporator has the following disadvantages: a. It is necessary to increase the liquid level control device to ensure that it enters the evaporation The refrigerant flow rate of the evaporator can maintain the liquid level at an appropriate height; b. The price of the liquid level control device is quite expensive, maintenance and adjustment are very troublesome, and the adaptability of the unit is poor when the unit conforms to changes; c. As the liquid level of the refrigerant decreases, the refrigerant oil in the evaporator that is compatible with the refrigerant is not easy to return to the compressor, which may cause the compressor to lose oil, which may directly lead to the burning of the compressor

[0009] In the existing air-cooled chillers, especially those using flooded evaporators, in order to ensure that the liquid level of the refrigerant in the evaporator is always kept at the required position, the liquid level gauge is installed on the side of the evaporator during operation, but The refrigerant in the evaporator barrel boils violently, and a large number of air bubbles are generated inside the barrel, which makes the liquid level detected by the liquid level gauge inconsistent with the actual level, resulting in system shock, and it is still easy to cause difficulty in oil return from the compressor, or the suction of the liquid will make the compressor Liquid compression will be generated, which will cause damage to the compressor; in addition, during the user's use, the refrigerant of the unit will inevitably leak, and the operation after the refrigerant is missing will have a bad impact on the parts that need to be cooled inside the compressor

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