CN202993708U - Parallel screw refrigerating unit control system - Google Patents
Parallel screw refrigerating unit control system Download PDFInfo
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- CN202993708U CN202993708U CN 201220627932 CN201220627932U CN202993708U CN 202993708 U CN202993708 U CN 202993708U CN 201220627932 CN201220627932 CN 201220627932 CN 201220627932 U CN201220627932 U CN 201220627932U CN 202993708 U CN202993708 U CN 202993708U
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Abstract
The utility model discloses a parallel screw refrigerating unit control system, and provides a control system which is flexible in control, high in reliability and capable of meeting the requirements of long-distance data transmission monitoring. A touch display module or remote upper computer, a unit main exhaust pipe pressure sensor, a unit main air suction pipe pressure sensor, a unit oil cooling temperature sensor, a unit oil heating temperature sensor and a low-pressure control system are respectively connected with a PLC (programmable logic controller), the touch display module or remote upper computer is used for displaying dynamic execution information of executive components of a parallel screw refrigerating unit and information acquisition curves of the sensors, controlling the executive components of the parallel screw refrigerating unit and storing historical information, and the low-pressure control system is used for controlling starting and stopping of the executive components of the parallel screw refrigerating unit. The unit outputs matched cooling capacity according to load change conditions, and the parallel screw refrigerating unit control system meets the requirements of various working environments and is more flexible and convenient in control and high in reliability.
Description
Technical field
The utility model relates to the parallel-screw refrigeration unit technical field based on freezer or quick-freezing plant, particularly relates to a kind of parallel-screw refrigeration unit control system.
Background technology
Along with the continuous expansion of China's Food Freezing and Cold Storage scale, the demand of cryogenic refrigeration equipment increases year by year, and screw machine is simple in structure with it, few easy workout part, and refrigerating efficiency is high, and that the output advantages such as cold is large are widely used in is freezing, the refrigeration field.The parallel-screw refrigeration unit is as the cold supply source of freezer or quick freezing unit, and the quality of its performance is freezing, the effect that refrigerates of impact directly.At present, the mode that parallel-screw refrigeration unit control system mainly still adopts temperature controller to control in conjunction with the low-voltage electrical apparatus combination is completed, and this control mode is controlled very flexible, carries out efficient low, reliability is not strong, and can not satisfy the requirement of remote data acquisition transmission.And, when each feedback control circuit detects fault message, directly carry out defencive function by corresponding low-voltage electrical apparatus control circuit.Owing to can not fault message being shown, need experienced technical staff to investigate, increased the difficulty of breakdown maintenance, use inconvenient.
The utility model content
The purpose of this utility model is for the technological deficiency that exists in prior art, and a kind of control is flexible, reliability is strong and provide, and can satisfy the parallel-screw refrigeration unit control system of data long-distance transmissions monitoring requirement.
For realizing that the technical scheme that the purpose of this utility model adopts is:
a kind of parallel-screw refrigeration unit control system, comprise touch-control display module or long-range host computer, unit total air escape pipe pressure sensor, the total Air suction pipe pressure sensor of unit, the unit oil cooling is temperature sensor but, unit oil heating-up temperature sensor, the PLC controller, low voltage control system, trouble feedback system, described touch-control display module or long-range host computer, unit total air escape pipe pressure sensor, the total Air suction pipe pressure sensor of unit, the unit oil cooling is temperature sensor but, unit oil heating-up temperature sensor, low voltage control system, trouble feedback system is connected with described PLC controller respectively, described touch-control display module or long-range host computer are used for showing that the Dynamic Execution information of each execution unit of parallel-screw refrigeration unit, each described sensor information gather curve and fault information, each execution unit of parallel-screw refrigeration unit is controlled, and historical information is preserved, described low voltage control system be used for to be controlled the start and stop of each execution unit of parallel-screw refrigeration unit, described PLC controller complete the start and stop intelligent on duty by turns of parallel-screw refrigeration unit and energy level adjustings, the protection of parallel-screw refrigeration unit intelligent trouble, sensor information collection, and long-range host computer or touch-control display module carry out the function of information interaction.
Described low voltage control system comprises compressor control system, condensation fan or control system of water pump, oil bypass valve control system, oil cooler control system, liquid supply electromagnetic valve control system.
described trouble feedback system comprises system low-voltage protection feedback circuit, system high pressure protection feedback circuit, system oil flow feedback circuit, compressor electric motor temperature protection feedback circuit, compressor overcurrent protection feedback circuit, the compressor operating feedback circuit, condensation fan overcurrent protection feedback circuit, condensate pump overcurrent protection feedback circuit, the power phase shortage feedback circuit, power supply anti-phase feedback circuit, line under-voltage or superpressure feedback circuit, the sensor fault feedback circuit, described system low-voltage protection feedback circuit, system high pressure protection feedback circuit, system oil flow feedback circuit, compressor electric motor temperature protection feedback circuit, compressor overcurrent protection feedback circuit, the compressor operating feedback circuit, condensation fan overcurrent protection feedback circuit, condensate pump overcurrent protection feedback circuit, the power phase shortage feedback circuit, power supply anti-phase feedback circuit, line under-voltage or superpressure feedback circuit, the sensor fault feedback circuit is connected with described PLC controller respectively, and fault message is fed back to described PLC controller.
Described long-range host computer is connected by communication cable with described PLC controller.
Compared with prior art, the beneficial effects of the utility model are:
1, control system of the present utility model is by the combination of various sensors and touch-control display module or host computer, PLC controller, make unit realize the output of coupling cold according to load variations situation intelligence, realize the intellectuality control of unit, satisfy the requirement of various working environments, control more flexible, convenient, reliability is high, can satisfy the needs of long-distance transmissions monitoring requirement, carries out efficient high.
2, control system of the present utility model can show fault message, keeps in repair more convenient.
Description of drawings
Figure 1 shows that the schematic diagram of the utility model parallel-screw refrigeration unit control system.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Figure 1 shows that the schematic diagram of the utility model parallel-screw refrigeration unit control system, comprise touch-control display module or long-range host computer, unit total air escape pipe pressure sensor, the total Air suction pipe pressure sensor of unit, the unit oil cooling is temperature sensor but, unit oil heating-up temperature sensor, the PLC controller, low voltage control system, trouble feedback system, described touch-control display module or long-range host computer, unit total air escape pipe pressure sensor, the total Air suction pipe pressure sensor of unit, the unit oil cooling is temperature sensor but, unit oil heating-up temperature sensor, low voltage control system, trouble feedback system is connected with described PLC controller respectively, described touch-control display module or long-range host computer are used for showing that the Dynamic Execution information of each execution unit of parallel-screw refrigeration unit, each described sensor information gather curve and fault information, each execution unit of parallel-screw refrigeration unit is controlled, and historical information is preserved, described low voltage control system be used for to be controlled the start and stop of each execution unit of parallel-screw refrigeration unit, described PLC controller complete the start and stop intelligent on duty by turns of parallel-screw refrigeration unit and energy level adjustings, the protection of parallel-screw refrigeration unit intelligent trouble, sensor information collection, and long-range host computer or touch-control display module carry out the function of information interaction.Described long-range host computer is connected by communication cable with described PLC controller.Described low voltage control system adopts original control system in prior art, comprises compressor control system, condensation fan or control system of water pump, oil bypass valve control system, oil cooler control system, liquid supply electromagnetic valve control system.
described trouble feedback system adopts original control circuit in prior art, comprises system low-voltage protection feedback circuit, system high pressure protection feedback circuit, system oil flow feedback circuit, compressor electric motor temperature protection feedback circuit, compressor overcurrent protection feedback circuit, the compressor operating feedback circuit, condensation fan overcurrent protection feedback circuit, condensate pump overcurrent protection feedback circuit, the power phase shortage feedback circuit, power supply anti-phase feedback circuit, line under-voltage or superpressure feedback circuit, the sensor fault feedback circuit, described system low-voltage protection feedback circuit, system high pressure protection feedback circuit, system oil flow feedback circuit, compressor electric motor temperature protection feedback circuit, compressor overcurrent protection feedback circuit, the compressor operating feedback circuit, condensation fan overcurrent protection feedback circuit, condensate pump overcurrent protection feedback circuit, the power phase shortage feedback circuit, power supply anti-phase feedback circuit, line under-voltage or superpressure feedback circuit, the sensor fault feedback circuit is connected with described PLC controller respectively, and fault message is fed back to described PLC controller.After described PLC controller is received fault message, the fault information is shown by touch-control display module or long-range host computer, simultaneously, control the corresponding execution unit of low voltage control system and stop, providing maintenance direction to the maintenance personal, use more convenient.
unit total air escape pipe pressure sensor, the total Air suction pipe pressure sensor of unit, the unit oil cooling is temperature sensor but, the information of unit oil heating-up temperature sensor collection is delivered to the PLC controller, the PLC controller carries out the coupling of cold according to the situation of load, the PLC controller is controlled compressor control system, condensation fan or control system of water pump, the oil bypass valve control system, the oil cooler control system, the liquid supply electromagnetic valve control system, Information Monitoring according to inspiratory pressure sensor regulates and controls to compressor energy level conversion and compressor start number of units, the start and stop of condensation fan (water pump) or speed governing regulate and control according to the Information Monitoring of back pressure transducer, the start and stop of oil bypass valve and oil cooler device according to oil cooling but the Information Monitoring of temperature sensor regulate and control, the start and stop of oil heater regulate and control according to the Information Monitoring of oily heating-up temperature sensor.Control system Real-Time Monitoring trouble feedback system information regulates and controls refrigeration part according to feedback information, and local touch-control display module or long-range host computer pass through communication cable Real Time Monitoring operating states of the units, and data are preserved.
The above is only preferred embodiment of the present utility model; should be noted that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. parallel-screw refrigeration unit control system, it is characterized in that, comprise touch-control display module or long-range host computer, unit total air escape pipe pressure sensor, the total Air suction pipe pressure sensor of unit, the unit oil cooling is temperature sensor but, unit oil heating-up temperature sensor, the PLC controller, low voltage control system, trouble feedback system, described touch-control display module or long-range host computer, unit total air escape pipe pressure sensor, the total Air suction pipe pressure sensor of unit, the unit oil cooling is temperature sensor but, unit oil heating-up temperature sensor, low voltage control system, trouble feedback system is connected with described PLC controller respectively, described touch-control display module or long-range host computer are used for showing that the Dynamic Execution information of each execution unit of parallel-screw refrigeration unit, each described sensor information gather curve and fault information, each execution unit of parallel-screw refrigeration unit is controlled, and historical information is preserved, described low voltage control system be used for to be controlled the start and stop of each execution unit of parallel-screw refrigeration unit, described PLC controller complete the start and stop intelligent on duty by turns of parallel-screw refrigeration unit and energy level adjustings, the protection of parallel-screw refrigeration unit intelligent trouble, sensor information collection, and long-range host computer or touch-control display module carry out the function of information interaction.
2. parallel-screw refrigeration unit control system according to claim 1, it is characterized in that, described low voltage control system comprises compressor control system, condensation fan or control system of water pump, oil bypass valve control system, oil cooler control system, liquid supply electromagnetic valve control system.
3. parallel-screw refrigeration unit control system according to claim 1, is characterized in that, described trouble feedback system comprises system low-voltage protection feedback circuit, system high pressure protection feedback circuit, system oil flow feedback circuit, compressor electric motor temperature protection feedback circuit, compressor overcurrent protection feedback circuit, the compressor operating feedback circuit, condensation fan overcurrent protection feedback circuit, condensate pump overcurrent protection feedback circuit, the power phase shortage feedback circuit, power supply anti-phase feedback circuit, line under-voltage or superpressure feedback circuit, the sensor fault feedback circuit, described system low-voltage protection feedback circuit, system high pressure protection feedback circuit, system oil flow feedback circuit, compressor electric motor temperature protection feedback circuit, compressor overcurrent protection feedback circuit, the compressor operating feedback circuit, condensation fan overcurrent protection feedback circuit, condensate pump overcurrent protection feedback circuit, the power phase shortage feedback circuit, power supply anti-phase feedback circuit, line under-voltage or superpressure feedback circuit, the sensor fault feedback circuit is connected with described PLC controller respectively, and fault message is fed back to described PLC controller.
4. parallel-screw refrigeration unit control system according to claim 1, is characterized in that, described long-range host computer is connected by communication cable with described PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220627932 CN202993708U (en) | 2012-11-22 | 2012-11-22 | Parallel screw refrigerating unit control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220627932 CN202993708U (en) | 2012-11-22 | 2012-11-22 | Parallel screw refrigerating unit control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202993708U true CN202993708U (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220627932 Expired - Fee Related CN202993708U (en) | 2012-11-22 | 2012-11-22 | Parallel screw refrigerating unit control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202993708U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160296A (en) * | 2019-05-23 | 2019-08-23 | 百尔制冷(无锡)有限公司 | Screw parallel unit electric current dynamic control method |
-
2012
- 2012-11-22 CN CN 201220627932 patent/CN202993708U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160296A (en) * | 2019-05-23 | 2019-08-23 | 百尔制冷(无锡)有限公司 | Screw parallel unit electric current dynamic control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20141122 |
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| EXPY | Termination of patent right or utility model |