Control method for heat pump control system based on programmable logic controller (PLC)

A technology of control system and control method, which is applied in the directions of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of inability to operate safely and optimally in power plants, untimely handling of problems, and insufficient pH standards, so as to facilitate real-time monitoring and data analysis. , Simple and effective control and adjustment, the effect of strong practicability

Active Publication Date: 2017-04-26
DONGGUAN HOTWHEELS ENERGY TECH
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AI Technical Summary

Problems solved by technology

[0003] The heat pump is the main equipment of the waste heat recovery and utilization system of the circulating cooling water of the power plant. The existing heat pump control adopts PLC to control and monitor the production process. Due to the characteristics of PLC industrial technology and equipment, it is difficult for the staff to modify and optimize the control program, and cannot Carry out safe and optimized operation according to the actual operating conditions of the power plant
Therefore, the existing heat pump control system has the following defects: first, the problem is not dealt with in time; second, the system is not optimized enough; third, the monitoring and analysis is single, and the error is large; not energy efficient

Method used

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  • Control method for heat pump control system based on programmable logic controller (PLC)

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Embodiment Construction

[0045] combined with figure 1 The specific implementation is given, and the technical solutions adopted in the present invention are further described in detail. The examples given are the best examples only for explaining the present invention, not for limiting the scope of the present invention.

[0046] Such as figure 1 As shown, a control method of a PLC-based heat pump control system, the control system includes a PLC control module 1, a host computer 2, a heat pump control device 3, an analog detection module 4 and a human-computer interaction device 5;

[0047] The upper computer 2 is connected with the PLC control module 1;

[0048] The heat pump control device 3 includes: a heat pump unit 301, a pool 302, and an auxiliary heater 303, and the auxiliary heater 303 is located in the pool 302;

[0049] The analog quantity detection module 4 comprises: an analog quantity collector 401, a temperature sensor 402, a temperature transmitter 403, a liquid level sensor 404, a...

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Abstract

The invention discloses a control method for a heat pump control system based on a programmable logic controller (PLC). The control system comprises a PLC control module, an upper computer, a heat pump control device, an analog quantity detection module and a human-computer interaction device. According to the control method for the heat pump control system based on the PLC, mainly based on a standard user memory curve and an Access data operation, the PLC control module conducts controlling and adjusting, and consequently the system can conduct accurate real-time monitoring and a data analysis conveniently. In addition, an auxiliary heater is additionally arranged in a pond, dual-heating can be successively carried out when needed, a large amount of hot water is quickly generated, energy saving is optimized, and the effect is significant. Through the control method, the functional requirement of an industrial heat pump can be met, simpleness, high efficiency, stability and reliability are achieved, intelligentized and centralized control, prediction and alarm are convenient, most importantly, more energy is saved, practicality is higher, and application prospects are wide.

Description

technical field [0001] The invention relates to the technical field of industrial heat pump control, in particular to a control method for a PLC-based heat pump control system. Background technique [0002] A heat pump is a device that transfers thermal energy from a low-temperature heat source to a high-temperature heat source. Heat pump technology originated in Switzerland and was introduced to my country in the early 1990s. Its application has shifted from the initial civilian air-conditioning field to the industrial field, such as waste water waste heat recovery, indoor and workshop air cooling, industrial high-temperature water, etc. [0003] The heat pump is the main equipment of the waste heat recovery and utilization system of the circulating cooling water of the power plant. The existing heat pump control adopts PLC to control and monitor the production process. Due to the characteristics of PLC industrial technology and equipment, it is difficult for the staff to m...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F25B49/00
CPCF25B49/00
Inventor吴涛王俊平
OwnerDONGGUAN HOTWHEELS ENERGY TECH