CN203216142U - Multi-fold liquid supply falling film evaporative water chilling system - Google Patents

Abstract

The utility model discloses a multi-fold liquid supply falling film evaporative water chilling system and provides a system which can utilize a solution pump to achieve multi-fold liquid supply and can provide low-temperature cold water. The exhaust port of refrigeration compressors is connected with the inlet of a condenser, the outlet of the condenser is connected with a gas-liquid inlet of a falling-film evaporator through a throttling device, the gas outlet of the falling-film evaporator is connected with a gas suction port of the refrigeration compressors, the liquid outlet of the falling-film evaporator is connected with the inlet of the solution pump, the liquid outlet of the solution pump is connected with the inlet of a liquid distribution pipeline on the upper portion of the falling-film evaporator, liquid is supplied to a liquid distributor in the falling-film evaporator through the liquid distribution pipeline, and the multi-fold liquid supply circulation is achieved through the solution pump. According to the multi-fold liquid supply falling film evaporative water chilling system, a water chilling unit achieves the multi-fold liquid supply circulation through the action of the solution pump, the heat exchange amount of refrigerant liquid and a heat exchange tube is improved, the heat exchange efficiency is improved, the size of the system heat exchange amount is easy to control, the outlet water temperature of the cold water can reach around 2 DEG C, and the multi-fold liquid supply falling film evaporative water chilling system can be widely applied to air conditioning systems which need low-temperature cold water.

Description

Super liquid supply falling film evaporative cooling water system

technical field

The utility model relates to the technical field of refrigeration, in particular to a falling film evaporative cold water system which utilizes a solution pump to realize super-double liquid supply.

Background technique

During the operation of the air conditioner, chillers are often used to provide the required cold water for the air conditioner system.

At present, in chillers using shell and tube evaporators as evaporators, dry evaporators, flooded evaporators and falling film evaporators are mostly used as evaporators, and the temperature of the output cold water is above 5°C. Among them, the falling film evaporator has a higher heat exchange efficiency.

In the current water chiller with falling film evaporator, the liquid supply method is to directly spray the throttling gas-liquid two-phase refrigerant to the outer wall of the shell-and-tube evaporator. Since the gas-liquid two refrigerants after throttling are directly sprayed to the outer wall of the pipe, the temperature of the cold water outlet is completely controlled by the liquid supply volume of the refrigerant and the flow of cold water. The temperature of the cold water outlet evaporator is generally above 5°C, which cannot meet lower The temperature of cold water needs to be supplied, moreover, the heat transfer efficiency needs to be improved.

Utility model content

The purpose of the utility model is to provide a falling-film evaporation cold water system that utilizes a solution pump to realize super-double liquid supply and provide low-temperature cold water.

The technical scheme adopted for realizing the purpose of this utility model is:

A falling film evaporative cold water system with super double liquid supply is characterized in that it includes a refrigeration compressor, a falling film evaporator, a condenser, a throttling device and a solution pump, and the exhaust port of the refrigeration compressor is connected to the condensing The inlet of the condenser is connected, the outlet of the condenser is connected with the gas-liquid inlet of the falling film evaporator through the throttling device, and the gas outlet of the falling film evaporator is connected with the suction port of the refrigeration compressor , the liquid outlet of the falling film evaporator is connected to the inlet of the solution pump, and the liquid outlet of the solution pump is connected to the inlet of the liquid distribution pipeline on the upper part of the falling film evaporator, and the liquid distribution pipeline goes down through the liquid distribution pipeline. The liquid distributor in the film evaporator supplies liquid, and the solution pump is used to realize the super double supply cycle.

The throttling device is any one of an expansion valve, a capillary tube, or an orifice throttling device.

The condenser is an air-cooled condenser or a water-cooled condenser.

Compared with the prior art, the beneficial effects of the utility model are:

1. Through the function of the solution pump, the water chiller of the utility model can realize a super-double liquid supply cycle, thereby increasing the heat exchange amount between the refrigerant liquid and the heat exchange pipeline, improving the heat exchange efficiency, and helping to reduce energy consumption.

2. In the water chiller of the present utility model, since the solution pump is used for refrigerant liquid circulation, the heat transfer volume of the system is easy to control, and the cold water temperature provided by the water chiller without the solution pump is lower, and the temperature of the cold water outlet can reach 2°C It can be widely used in air-conditioning systems that require low-temperature cold water.

Description of drawings

Fig. 1 shows the schematic diagram of the falling film evaporative cooling water system of the utility model with super double liquid supply.

In the figure: 1. Refrigeration compressor, 2. Falling film evaporator, 3. Condenser, 4. Throttling device, 5. Solution pump, 6. Liquid distribution pipeline, 7. Liquid distributor.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Fig. 1 shows the schematic diagram of the utility model's ultra-double liquid supply falling film evaporation cold water system, including a refrigeration compressor 1, a falling film evaporator 2, a condenser 3, a throttling device 4 and a solution pump 5, and the refrigeration compressor The exhaust port of the machine 1 is connected with the inlet of the condenser 3, and the outlet of the condenser 3 is connected with the gas-liquid inlet of the falling film evaporator 2 through the throttling device 4, and the falling film evaporator The gas outlet of 2 is connected with the suction port of the refrigeration compressor 1, the liquid outlet of the falling film evaporator 2 is connected with the inlet of the solution pump 5, and the liquid outlet of the solution pump 5 is connected with the falling film evaporator 5. The liquid distribution pipeline 6 on the upper part of the evaporator is connected to the inlet, and the liquid distribution pipeline 6 is used to supply liquid to the liquid distributor 7 in the falling film evaporator, and the solution pump 5 is used to realize the super double supply cycle.

Wherein, the throttling device is any one of expansion valve, capillary tube, orifice throttling device, or other throttling devices.

The condenser is an air-cooled condenser or a water-cooled condenser, and may also be a condenser of other forms.

The refrigerating compressor may be in the form of connecting multiple refrigerating compressors 1 in parallel.

When the system is running, the low-pressure refrigerant vapor returned to the refrigeration compressor 1 from the upper part of the falling film evaporator 2 cylinder is compressed by the refrigeration compressor 1 and then condensed into a high-pressure refrigerant liquid in the condenser 3 After being throttled by the throttling device 4, the low-pressure gas-liquid two-phase fluid enters the cylinder body of the falling film evaporator 2, wherein the low-pressure gas refrigerant returns from the upper part of the cylinder body of the falling film evaporator 2 to the Refrigeration compressor 1, the low-pressure liquid refrigerant at the bottom of the falling film evaporator 2 cylinder is lifted to the upper part of the falling film evaporator 2 cylinder through the solution pump 5 and the liquid distribution pipeline 6, and then passed through the falling film evaporator 2 The liquid distributor 7 on the upper part of the film evaporator 2 cylinder evenly falls on the outer wall of the horizontal tube of the falling film evaporator 2 to form a thin film, and evaporates and absorbs the heat of the water flow inside the horizontal tube, and the evaporated refrigerant vapor evaporates from the falling film The upper part of the barrel of the device 2 returns to the refrigeration compressor 1 to complete the cycle. Due to the action of the solution pump 5, the amount of refrigerant liquid flowing through the outer wall of the horizontal tube of the falling film evaporator 2 is much higher than that without a solution pump, forming a super-double liquid supply cycle.

The water chiller of the utility model realizes a super-double liquid supply cycle through the action of the solution pump, increases the heat exchange amount between the refrigerant liquid and the heat exchange pipeline, and improves the heat exchange efficiency. Moreover, the amount of heat exchange in the system is easy to control, and the temperature of the cold water outlet can reach about 2°C, which can be widely used in air-conditioning systems that require low-temperature cold water.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these Improvement and retouching should also be regarded as the protection scope of the present utility model.

Claims (3)

1. A falling-film evaporative cold water system for super-doubling liquid supply is characterized in that it comprises a refrigeration compressor, a falling-film evaporator, a condenser, a throttling device and a solution pump, and the exhaust port of the refrigeration compressor is connected to the The inlet of the condenser is connected, the outlet of the condenser is connected with the gas-liquid inlet of the falling film evaporator through the throttling device, and the gas outlet of the falling film evaporator is connected with the suction of the refrigeration compressor The liquid outlet of the falling film evaporator is connected to the inlet of the solution pump, the liquid outlet of the solution pump is connected to the inlet of the liquid distribution pipeline on the upper part of the falling film evaporator, and the liquid distribution pipe passes through the The road supplies liquid to the liquid distributor in the falling film evaporator, and the solution pump is used to realize the super-doubling liquid supply cycle. 2. The falling film evaporative chilled water system with super liquid supply according to claim 1, wherein the throttling device is any one of an expansion valve, a capillary tube, or an orifice throttling device. 3. The falling-film evaporative cold water system with super-doubling liquid supply according to claim 1, wherein the condenser is an air-cooled condenser or a water-cooled condenser.

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