CN2802332Y

CN2802332Y - Digital control energy-saving system of central air conditioner

Info

Publication number: CN2802332Y
Application number: CN 200520096727
Authority: CN
Inventors: 黄真银
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-10
Filing date: 2005-06-10
Publication date: 2006-08-02
Anticipated expiration: 2015-06-10

Abstract

The utility model relates to a digital control energy-saving system of a central air conditioner, which belongs to the technical field of the precise control of comprehensive devices of a central air conditioner. The utility model mainly comprises a master computer, devices, a programmable controller of a main machine. Signals which are generated by sensors for indoor and outdoor temperature, pressure, etc., a refrigerant water pump, a cooling water pump and a cooling tower fan which are arranged in a central air conditioner, a multiple machine-set control device of a conditioner main machine and a frequency converter of the refrigerant water pump, a frequency converter of the cooling water pump and a frequency converter of the cooling tower fan enter a computer through a communication network. The signals are calculated through a database which is arranged in the master computer, and then transmitted to all devices. Control process is completed. As the device adopts indoor and outdoor information collecting units to carry out omnibearing indoor and outdoor data collection, all devices of the central air conditioner are regulated though the programmable controller and the master computer after comprehensive calculation. Energy consumption of the devices which runs unreasonably is removed from a central air conditioner system, and the purposes of high efficiency and energy saving are achieved.

Description

Central air-conditioning digitalized control energy-saving system

Technical field

The utility model relates to a kind of energy saver, particularly a kind of digitalized control energy-saving system that is used for central air-conditioning.

Background technology

At present, central air-conditioning is to provide different equipment by each different producer, air-conditioner host factory provides main frame, end-equipment improves in air conditioning terminal factory, control apparatus factory provides device for switching, water tube apparatus factory provides pipeline equipments such as water pump, Air-conditioner design teacher presses according to actual conditions designing apparatus and pipeline, installation company installs, lack contact between each equipment, when full amount is moved, can move, but under sub-load, move because equipment is not to satisfy under the room air conditioner effect to closely cooperate at operating point separately, just very uneconomical.The central air-conditioning energy measure that has again mainly is pump variable frequency, a unsteady flow amount of emphasizing water system, carry out variable frequency adjustment with single control point temperature, pressure by system, rather than regulate main control system equipment, end-equipment according to the energy demand in terminal room, load does not have contact between each room, can not make corresponding adjusting according to the whole system operation situation.

The utility model content

The purpose of this utility model provide a kind of can according to the central air-conditioning energy consumption the final energy that satisfies control to adjust all devices in the central air-conditioning, reach energy-conservation purpose central air-conditioning digitalized control energy-saving system.

The purpose of this utility model is achieved in that a kind of central air-conditioning digitalized control energy-saving system, comprise PC host computer 1, PC host computer 1 is connected with equipment Programmable Logic Controller 3 by communication cable 2, equipment Programmable Logic Controller 3 is connected with main frame Programmable Logic Controller 5 by communication cable 4, and main frame Programmable Logic Controller 5 is connected with Thermal Equipment 7 with handpiece Water Chilling Units 6; PC host computer 1 is connected with

data collecting card

8,9,10, and data collecting card 8 is connected with indoor temperature transmitter 12 by communication board 11; Data collecting card 9 and main frame electrical quantity sensor 13, outdoor temperature sensor 14, luminosity sensor 15 and chilled-water system output sensor 16; Data collecting card 10 is connected with cooling tower system 18 with refrigerant system 17;

Equipment Programmable Logic Controller 3 is connected with relay with frequency converter.Frequency converter is cooling water pump frequency converter 19, refrigerant system water pump frequency conversion device 21 and blower fan of cooling tower frequency converter 23.Relay is cooling water main frequency water pump relay 20, refrigerant system main frequency water pump relay 22 and cooling tower power frequency blower fan relay 24.Adopt RS232 or RS485 communication interface by communication cable 2 and communication cable 4.

Central air-conditioning digitalized control energy-saving provided by the utility model system, owing to adopted the indoor and outdoor information acquisition unit in all directions chamber, inside and outside data to be adopted, by Programmable Logic Controller and main frame the relevant device of central air-conditioning is regulated after the COMPREHENSIVE CALCULATING, remove central air conditioner system irrational plant capacity consumption in service, reached energy-efficient purpose.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is a fundamental diagram of the present utility model.

The specific embodiment

The operation principle of this device is as follows:

Indoor information is gathered by temperature controller 12, temperature controller can detect indoorly whether people and indoor temperature, humidity, pressure information are arranged by communication board 11 and data collecting card by infrared sensor, indoor temperature transmitter, indoor humidity sensor, room pressure sensor, passes to PC host computer 1 again;

Outdoor information is gathered by outdoor temperature sensor 14, luminosity sensor 15, pass to PC host computer 1 by data collecting card 9, while chilled-water system flow sensor 16, main frame electrical quantity sensor 13 are gathered chilled water flow size respectively and the main frame electric weight is big or small and information is passed to PC host computer 1;

Refrigerant system 17 and in refrigerant system inflow temperature, supply water temperature, pressure, supply head, return water temperature, information such as the leaving water temperature in cooling tower system 18 Tower Systems, pressure of supply water, pressure of return water pass to PC host computer 1 after being gathered by data collecting card 10;

After the information via main frame Programmable Logic Controller 5 of handpiece Water Chilling Units, Thermal Equipment is handled, pass to equipment Programmable Logic Controller 4 through communication cable 4 and enter PC host computer 1 through communication cable 2 again;

In the PC host computer, set up all model libraries of free accent load, illuminance calculating model library, use storehouse, room, end-equipment parameter library, calculator room equipment parameter library, carry enthalpy to calculate databases such as storehouse, electric weight calculating simulated reservoir, handle the back by communication cable 2 access arrangement Programmable Logic Controllers 3 by the information via PC host computer 1 that transmission such as capture card come, part signal feeds back to main frame Programmable Logic Controller 5, but main frame Programmable Logic Controller 5 control handpiece Water Chilling Units 6 and Thermal Equipments 7; Part signal carries out variable frequency adjustment by equipment Programmable Logic Controller 3 control cooling water frequency converters 19, refrigerant system water pump

frequency conversion device

21,23 pairs of relevant devices of blower fan of cooling tower frequency converter; Or control cooling water main frequency water pump relay 20, refrigerant system main frequency water pump relay 22, cooling tower power frequency blower fan relay 24 control relevant device break-makes.Like this, various coherent signals enter the regulatory function that can realize after PC host computer 1 is handled relevant device, keep the state operation of whole system with the best.

Claims

1, a kind of central air-conditioning digitalized control energy-saving system, comprise PC host computer (1), it is characterized in that: PC host computer (1) is connected with equipment Programmable Logic Controller (3) by communication cable (2), equipment Programmable Logic Controller (3) is connected with main frame Programmable Logic Controller (5) by communication cable (4), and main frame Programmable Logic Controller (5) is connected with Thermal Equipment (7) with handpiece Water Chilling Units (6);

PC host computer (1) is connected with data collecting card (8,9,10), and data collecting card (8) is connected with indoor temperature transmitter (12) by communication board (11);

Data collecting card (9) and main frame electrical quantity sensor (13), outdoor temperature sensor (14), luminosity sensor (15) and chilled-water system output sensor (16);

Data collecting card (10) is connected with cooling tower system (18) with refrigerant system (17);

Equipment Programmable Logic Controller (3) is connected with relay with frequency converter.

2, central air-conditioning digitalized control energy-saving according to claim 1 system, it is characterized in that: frequency converter is cooling water pump frequency converter (19), refrigerant system water pump frequency conversion device (21) and blower fan of cooling tower frequency converter (23).

3, central air-conditioning digitalized control energy-saving according to claim 1 system, it is characterized in that: relay is cooling water main frequency water pump relay (20), refrigerant system main frequency water pump relay (22) and cooling tower power frequency blower fan relay (24).

4, central air-conditioning digitalized control energy-saving according to claim 1 system is characterized in that: adopt RS232 or RS485 communication interface by communication cable (2) and communication cable (4).