阅读说明：本技术 节流与热气旁通耦合的制冷量调节系统及控制方法 (Throttling and hot gas bypass coupled refrigerating capacity adjusting system and control method ) 是由 王志民 时阳 王家凯 邱明召 于 2019-12-11 设计创作，主要内容包括：本发明公开了一种节流与热气旁通耦合的制冷量调节系统及控制方法,由制冷系统、载冷剂循环系统和控制器组成；控制器实时采集温度传感器输出的温度检测数据；当温度传感器检测的载冷剂温度值高于设定的目标温度值0.1℃时,控制器按照预设程序比例控制方式控制前级节流电动调节阀开度逐渐增大以提高流经所述换热器制冷剂通道的制冷剂流量,同时控制器按照预设程序比例控制方式控制旁通电动调节阀开度逐渐减小以降低流经换热器制冷剂通道的制冷剂蒸汽流量；通过增大前级节流电动调节阀开度和减小旁通电动调节阀开度实现调节载冷剂温度值至设定的目标温度值。本发明实现对制冷系统制冷量的精密控制,系统不产生冲击现象,同时也大大减小了噪音。(The invention discloses a throttling and hot gas bypass coupled refrigerating capacity adjusting system and a control method, and the throttling and hot gas bypass coupled refrigerating capacity adjusting system consists of a refrigerating system, a secondary refrigerant circulating system and a controller; the controller collects temperature detection data output by the temperature sensor in real time; when the temperature value of the secondary refrigerant detected by the temperature sensor is 0.1 ℃ higher than the set target temperature value, the controller controls the opening of the pre-stage throttling electric regulating valve to gradually increase according to a preset program proportional control mode so as to improve the flow of the refrigerant flowing through the refrigerant channel of the heat exchanger, and simultaneously controls the opening of the bypass electric regulating valve to gradually decrease according to the preset program proportional control mode so as to reduce the flow of the refrigerant steam flowing through the refrigerant channel of the heat exchanger; the temperature value of the secondary refrigerant is adjusted to the set target temperature value by increasing the opening degree of the front-stage throttling electric regulating valve and reducing the opening degree of the bypass electric regulating valve. The invention realizes the precise control of the refrigerating capacity of the refrigerating system, the system does not generate impact phenomenon, and simultaneously, the noise is greatly reduced.)

1. A refrigerating capacity regulating system with throttling and hot gas bypass coupling is composed of a refrigerating system, a secondary refrigerant circulating system and a controller; the method is characterized in that: the refrigerating system comprises a refrigerating compressor, a condenser, a drying filter, a preceding stage throttling electric regulating valve and a bypass electric regulating valve, wherein one path of an exhaust port of the refrigerating compressor is communicated with an inlet of the preceding stage throttling electric regulating valve through the condenser and the drying filter through a three-way pipe, and the other path of the exhaust port of the refrigerating compressor is communicated with an inlet of the bypass electric regulating valve; the outlet of the pre-stage throttling electric regulating valve and the outlet of the bypass electric regulating valve are communicated with the inlet of a refrigerant channel of the heat exchanger, and the outlet of the refrigerant channel of the heat exchanger is communicated with the air suction port of the refrigeration compressor; the secondary refrigerant circulating system is a delivery pump; the inlet of the conveying pump is communicated with the secondary refrigerant channel outlet of the heat exchanger, the outlet of the conveying pump is communicated with the inlet of the load heat exchange channel, and the outlet of the load heat exchange channel is communicated with the secondary refrigerant channel inlet of the heat exchanger; a temperature sensor for detecting the temperature of the secondary refrigerant is arranged at the outlet of the conveying pump, and the detection signal output end of the temperature sensor is connected with the detection signal input end of the controller; the control signal input ends of the executing mechanisms of the pre-stage throttling electric regulating valve and the bypass electric regulating valve are respectively connected with the control signal output end of the controller.

2. A method of controlling a refrigeration capacity modulating system with throttling coupled hot gas bypass as claimed in claim 1 wherein: the method comprises the following steps:

step 1, the controller collects temperature detection data output by the temperature sensor in real time;

step 2, when the temperature value of the secondary refrigerant detected by the temperature sensor is higher than a set target temperature value by 0.1 ℃, the controller controls the opening of the front-stage throttling electric regulating valve to gradually increase according to a preset program proportional control mode so as to improve the flow of the refrigerant flowing through the refrigerant channel of the heat exchanger, and simultaneously controls the opening of the bypass electric regulating valve to gradually decrease according to a preset program proportional control mode so as to reduce the flow of the refrigerant steam flowing through the refrigerant channel of the heat exchanger; adjusting the temperature value of the secondary refrigerant to a set target temperature value by increasing the opening of the front-stage throttling electric regulating valve and reducing the opening of the bypass electric regulating valve;

step 3, when the temperature value of the secondary refrigerant detected by the temperature sensor is lower than a set target temperature value by 0.1 ℃, the controller controls the opening of the front-stage throttling electric regulating valve to gradually decrease according to a preset program proportion control mode so as to reduce the flow of the refrigerant flowing through the refrigerant channel of the heat exchanger, and simultaneously controls the opening of the bypass electric regulating valve to gradually increase according to the preset program proportion control mode so as to improve the flow of the refrigerant steam flowing through the refrigerant channel of the heat exchanger; the temperature value of the secondary refrigerant is adjusted to the set target temperature value by reducing the opening degree of the front-stage throttling electric regulating valve and increasing the opening degree of the bypass electric regulating valve.

Technical Field

The invention relates to a refrigerating system, in particular to a throttling and hot gas bypass coupled refrigerating capacity adjusting system and a control method.

Background

Semiconductor manufacturing equipment, battery manufacturing equipment, PCB manufacturing equipment, etc. all require temperature control systems that require higher cooling capacity and temperature control accuracy. At present, the temperature control system for the manufacturing equipment mostly adopts an automatic pressure proportional control valve to control the opening degree, and a bypass electromagnetic valve controls the temperature according to the set temperature and a method of controlling the average opening degree according to a time proportional control mode. The defects of the method are as follows: the controlled temperature fluctuation range is large; the bypass electromagnetic valve is controlled in a time proportion adjusting mode, so that the switching frequency impacts a system, and the service life of the bypass electromagnetic valve is shortened and the suction noise is large due to frequent switching of the bypass electromagnetic valve.

Disclosure of Invention

The invention aims to provide a throttling and hot gas bypass coupled refrigerating capacity regulating system, and the invention also aims to provide a control method of the refrigerating capacity regulating system.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention relates to a throttling and hot gas bypass coupled refrigerating capacity adjusting system, which consists of a refrigerating system, a secondary refrigerant circulating system and a controller; the refrigerating system comprises a refrigerating compressor, a condenser, a drying filter, a preceding stage throttling electric regulating valve and a bypass electric regulating valve, wherein one path of an exhaust port of the refrigerating compressor is communicated with an inlet of the preceding stage throttling electric regulating valve through the condenser and the drying filter through a three-way pipe, and the other path of the exhaust port of the refrigerating compressor is communicated with an inlet of the bypass electric regulating valve; the outlet of the pre-stage throttling electric regulating valve and the outlet of the bypass electric regulating valve are communicated with the inlet of a refrigerant channel of the heat exchanger, and the outlet of the refrigerant channel of the heat exchanger is communicated with the air suction port of the refrigeration compressor; the secondary refrigerant circulating system is a delivery pump; the inlet of the conveying pump is communicated with the secondary refrigerant channel outlet of the heat exchanger, the outlet of the conveying pump is communicated with the inlet of the load heat exchange channel, and the outlet of the load heat exchange channel is communicated with the secondary refrigerant channel inlet of the heat exchanger; a temperature sensor for detecting the temperature of the secondary refrigerant is arranged at the outlet of the conveying pump, and the detection signal output end of the temperature sensor is connected with the detection signal input end of the controller; the control signal input ends of the executing mechanisms of the pre-stage throttling electric regulating valve and the bypass electric regulating valve are respectively connected with the control signal output end of the controller.

The control method of the throttling and hot gas bypass coupled refrigerating capacity regulating system is carried out according to the following steps:

step 1, the controller collects temperature detection data output by the temperature sensor in real time;

step 2, when the temperature value of the secondary refrigerant detected by the temperature sensor is higher than a set target temperature value by 0.1 ℃, the controller controls the opening of the front-stage throttling electric regulating valve to gradually increase according to a preset program proportional control mode so as to improve the flow of the refrigerant flowing through the refrigerant channel of the heat exchanger, and simultaneously controls the opening of the bypass electric regulating valve to gradually decrease according to a preset program proportional control mode so as to reduce the flow of the refrigerant steam flowing through the refrigerant channel of the heat exchanger; adjusting the temperature value of the secondary refrigerant to a set target temperature value by increasing the opening of the front-stage throttling electric regulating valve and reducing the opening of the bypass electric regulating valve;

step 3, when the temperature value of the secondary refrigerant detected by the temperature sensor is lower than a set target temperature value by 0.1 ℃, the controller controls the opening of the front-stage throttling electric regulating valve to gradually decrease according to a preset program proportion control mode so as to reduce the flow of the refrigerant flowing through the refrigerant channel of the heat exchanger, and simultaneously controls the opening of the bypass electric regulating valve to gradually increase according to the preset program proportion control mode so as to improve the flow of the refrigerant steam flowing through the refrigerant channel of the heat exchanger; the temperature value of the secondary refrigerant is adjusted to the set target temperature value by reducing the opening degree of the front-stage throttling electric regulating valve and increasing the opening degree of the bypass electric regulating valve.

The invention adopts a preceding stage throttling electric regulating valve as a preceding stage actuator and a bypass electric regulating valve as a subsequent stage actuator. The front-stage actuator adjusts the flow of the normal-temperature high-pressure refrigerant liquid entering the heat exchanger, and the rear-stage actuator adjusts the flow of the high-temperature high-pressure refrigerant steam entering the heat exchanger. The controller carries out reciprocal regulation on the opening degrees of the preceding stage throttling electric regulating valve and the bypass electric regulating valve according to a preset program proportion control mode, and realizes the precise control on the refrigerating capacity of the refrigerating system, so that the temperature fluctuation degree of the secondary refrigerant is greatly reduced, the system does not generate an impact phenomenon, meanwhile, the noise is greatly reduced, and the service life of the system is prolonged.

Drawings

Fig. 1 is a schematic diagram of a throttle and hot gas bypass coupled refrigeration capacity modulation system according to the present invention.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1, the throttling and hot gas bypass coupled refrigeration capacity adjusting system of the present invention comprises a refrigeration system, a secondary refrigerant circulation system and a controller; the refrigeration system comprises a refrigeration compressor 1, a condenser 2, a drying filter 3, a front-stage throttling electric regulating valve 4 and a bypass electric regulating valve 5, wherein one path of an exhaust port of the refrigeration compressor 1 is communicated with an inlet of the front-stage throttling electric regulating valve 4 through the condenser 2 and the drying filter 3 through a three-way pipe, and the other path of the exhaust port of the refrigeration compressor is communicated with an inlet of the bypass electric regulating valve 5; an outlet of the front-stage throttling electric regulating valve 4 and an outlet of the bypass electric regulating valve 5 are communicated with an inlet 6.1 of a refrigerant channel of the heat exchanger 6, and an outlet 6.2 of the refrigerant channel of the heat exchanger 6 is communicated with an air suction port of the refrigeration compressor 1; the secondary refrigerant circulating system is a delivery pump 7; an inlet of the delivery pump 7 is communicated with a secondary refrigerant channel outlet 6.3 of the heat exchanger 6, an outlet of the delivery pump 6 is communicated with an inlet of the load heat exchange channel, and an outlet of the load heat exchange channel is communicated with a secondary refrigerant channel inlet 6.4 of the heat exchanger 6; a temperature sensor 8 for detecting the temperature of the secondary refrigerant is arranged at the outlet of the delivery pump 7, and the detection signal output end of the temperature sensor 8 is connected with the detection signal input end of a controller 9; the control signal input ends of the executing mechanisms of the pre-stage throttling electric regulating valve 4 and the bypass electric regulating valve 5 are respectively connected with the control signal output end of the controller 9.

The control method of the throttling and hot gas bypass coupled refrigerating capacity regulating system is carried out according to the following steps:

step 1, a controller 9 collects temperature detection data output by a temperature sensor 8 in real time;

step 2, when the temperature value of the secondary refrigerant detected by the temperature sensor 8 is higher than a set target temperature value by 0.1 ℃, the controller 9 controls the opening of the front-stage throttling electric regulating valve 4 to gradually increase according to a preset program proportional control mode so as to improve the flow of the refrigerant flowing through the refrigerant channel of the heat exchanger 6, and simultaneously, the controller 9 controls the opening of the bypass electric regulating valve 5 to gradually decrease according to a preset program proportional control mode so as to reduce the flow of the refrigerant steam flowing through the refrigerant channel of the heat exchanger 6; the opening degree of the front-stage throttling electric regulating valve 4 is increased and the opening degree of the bypass electric regulating valve 5 is reduced to adjust the temperature value of the secondary refrigerant to a set target temperature value;

step 3, when the temperature value of the secondary refrigerant detected by the temperature sensor 8 is lower than the set target temperature value by 0.1 ℃, the controller 9 controls the opening of the front-stage throttling electric regulating valve 4 to gradually decrease according to a preset program proportional control mode so as to reduce the flow of the refrigerant flowing through the refrigerant channel of the heat exchanger 6, and simultaneously, the controller 9 controls the opening of the bypass electric regulating valve 5 to gradually increase according to a preset program proportional control mode so as to improve the flow of the refrigerant steam flowing through the refrigerant channel of the heat exchanger 6; the temperature value of the secondary refrigerant is adjusted to the set target temperature value by reducing the opening degree of the front-stage throttling electric regulating valve 4 and increasing the opening degree of the bypass electric regulating valve 5.