Independent double-system screw water chiller

Abstract

The utility model discloses an independent double system screw water chiller unit relates to refrigeration and air conditioning technical field. Including two unit systems, each unit system includes a screw compressor, an evaporator and a condenser, the evaporator, the screw compressor and the condenser are connected in turn circulation, wherein, two unit systems adopt double system cooperation setting or one spare redundant setting. The screw water chiller unit provided by the utility model, each unit system contains independent screw compressor, evaporator and condenser, reduces the size of unit length aspect, saves the material use of evaporator and condenser simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration and air conditioning technology, specifically to an independent dual-system screw chiller unit. Background Technology

[0002] With the continuous development of industry, many production processes, such as those in the chemical, electronics, and pharmaceutical industries, have placed higher demands on temperature control. For example, in the manufacturing process of electronic chips, precise temperature control is crucial to ensuring chip quality and performance. Traditional refrigeration equipment struggles to meet the demands of large-scale, high-precision refrigeration, prompting the development of more efficient and stable refrigeration equipment, leading to the emergence of screw chillers. With the increasingly tense global energy situation, energy conservation has become a key focus for various industries. Compared to traditional reciprocating chillers, screw chillers have a higher energy efficiency ratio, effectively reducing energy consumption and meeting the requirements of enterprises to reduce production costs and society to conserve energy and reduce emissions.

[0003] Existing screw chillers are generally divided into single-screw and twin-screw types, and both types typically share a single evaporator and condenser. When a system malfunctions, parts need replacement, or the chiller shell requires cleaning, the entire unit often needs to be shut down for maintenance. However, some factories require 24 / 7 continuous production. In such cases, downtime for maintenance not only affects production schedules but also results in losses in both production efficiency and economic benefits.

[0004] Secondly, in some smaller spaces, sharing an evaporator and condenser will increase the length and diameter of the cylinder, which in turn increases the length of the unit and the material cost. Utility Model Content

[0005] The main purpose of this utility model is to provide an independent dual-system screw chiller unit to overcome the problems existing in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An independent dual-system screw chiller unit includes two unit systems, each unit system including a screw compressor, an evaporator and a condenser, wherein the evaporator, the screw compressor and the condenser are connected in a cyclic manner in sequence;

[0008] The two unit systems are configured with either a dual-system collaborative setup or a one-in-use, one-backup redundant setup.

[0009] Furthermore, it also includes a PLC control system, which is electrically connected to both screw compressors.

[0010] Furthermore, the PLC control system is also equipped with a touch screen.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] Each unit system of this utility model includes an independent screw compressor, evaporator and condenser, which reduces the length of the unit and saves on the material used for the evaporator and condenser;

[0013] The system adopts a one-in-one-backup redundancy configuration and a dynamic switching mechanism between the two units to ensure the continuous and stable operation of the production system, effectively avoiding the risk of factory downtime caused by single-unit failure and significantly improving system reliability and continuity.

[0014] By adopting a dual-system collaborative setup, when one unit needs to be inspected or the tank needs maintenance, the other unit can be put into emergency operation. This ensures core production needs while avoiding energy consumption surges and equipment wear caused by single unit operating at full load, achieving a dual balance between fault tolerance and energy efficiency optimization. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Explanation of reference numerals in the attached diagram: 1. Screw compressor; 2. Evaporator; 3. Condenser; 4. Control box. Detailed Implementation

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0018] Combination Figure 1 This embodiment provides an independent dual-system screw chiller unit, including two unit systems. Each unit system includes a screw compressor 1, an evaporator 2, and a condenser 3, which are connected in a cyclical manner.

[0019] The two generating units are configured with either a dual-system collaborative setup or a one-in-one-backup redundancy setup.

[0020] Specifically, the unit system can adopt a "one-in-use, one-out-of-charge" redundant configuration mode. When a single unit shuts down due to a fault, enters a maintenance cycle, or when the associated tanks need to undergo maintenance operations such as cleaning or replacement, the standby unit can be started in a timely manner. This mode, through the dynamic switching mechanism between the two units, ensures the continuous and stable operation of the production system, effectively avoids the risk of factory downtime caused by single-unit failure, and significantly improves system reliability and continuity.

[0021] Employing a dual-system collaborative working mode, the two units operate in tandem at their required cooling capacity under normal conditions, achieving energy-saving effects of "low heat generation and low energy consumption" through precise power matching. When one unit needs maintenance or the tank requires repair, the other unit can automatically switch to an emergency operating state at 75% of its full capacity. This ensures core production needs are met while avoiding energy consumption spikes and equipment wear caused by a single unit operating at full load, achieving a dual balance between fault tolerance and energy efficiency optimization.

[0022] In this embodiment, a PLC control system is also included, which is electrically connected to both screw compressors 1. Specifically, the PLC control system includes a control box 4, and both screw compressors 1 are connected to the control box 4.

[0023] In a further embodiment, the PLC control system is also equipped with a touch screen.

[0024] This invention designs the screw chiller as a modular dual-system structure, with each unit system comprising an independent screw compressor 1, evaporator 2, and condenser 3. This reduces the material usage of the evaporator 2 and condenser 3, thus decreasing the overall length of the unit. The unit system is also equipped with a PLC (Programmable Logic Controller) control system to monitor the unit's operating parameters in real time, including the screw compressor 1's suction pressure, discharge pressure, evaporator temperature, and condenser temperature. Based on the set parameter range, it automatically adjusts the compressor speed, refrigerant flow rate, and water flow rate, enabling adaptive operation of the unit, whether it's a single unit under low load or multiple units under high load.

[0025] Meanwhile, the touchscreen human-machine interface allows operators to easily set parameters and monitor operational status. When a system malfunctions, requires maintenance, or needs replacement, that system can be shut down for repair without affecting the normal operation of other systems, ensuring continuous 24 / 7 production. Furthermore, the modular design facilitates equipment installation, transportation, and future expansion.

[0026] During operation, the refrigerant exiting the evaporator 2 of the screw chiller unit is in a gaseous state. After being adiabatically compressed by the screw compressor 1, it becomes a high-temperature, high-pressure state. The compressed gaseous refrigerant is then isobarically cooled and condensed in the condenser 3, transforming into a liquid refrigerant. It then expands to a low pressure through a throttling valve, becoming a gas-liquid mixture.

[0027] In this process, the liquid refrigerant, operating at low temperature and pressure, absorbs heat from the substance being cooled in evaporator 2 and reverts to a gaseous state. The gaseous refrigerant then re-enters screw compressor 1 through pipes, beginning a new cycle. This completes the four processes of the refrigeration cycle.

[0028] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An independent dual-system screw chiller unit, characterized in that, It includes two unit systems, each of which includes a screw compressor (1), an evaporator (2) and a condenser (3), wherein the evaporator (2), the screw compressor (1) and the condenser (3) are connected in a cycle in sequence; The two unit systems are configured with either a dual-system collaborative setup or a one-in-use, one-backup redundant setup.

2. The independent dual-system screw chiller unit as described in claim 1, characterized in that, It also includes a PLC control system, which is electrically connected to the two screw compressors (1) respectively.

3. The independent dual-system screw chiller unit as described in claim 2, characterized in that, The PLC control system is also equipped with a touch screen.

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