CN201327582Y - Intelligent control device for evaporative condenser - Google Patents
Intelligent control device for evaporative condenser Download PDFInfo
- Publication number
- CN201327582Y CN201327582Y CNU2008202315326U CN200820231532U CN201327582Y CN 201327582 Y CN201327582 Y CN 201327582Y CN U2008202315326 U CNU2008202315326 U CN U2008202315326U CN 200820231532 U CN200820231532 U CN 200820231532U CN 201327582 Y CN201327582 Y CN 201327582Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- detection circuit
- conversion integrated
- multipath conversion
- integrated circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses an intelligent control device for an evaporative condenser, which can guarantee the reliable and stable operation of a refrigeration system, reduce the labor intensity of workers, realize the remote transmission of operation data for monitoring and control multiple evaporative condensers at the same time. The intelligent control device for the evaporative condensers is provided with a microprocessor. The input end of the microprocessor is connected with a water tank temperature detection circuit, a 4-20mA current detection circuit, a water pump overload detection circuit, a fan overload detection circuit, a water tank liquid level detection circuit, a refrigeration permissive signal detection circuit and a winter operation signal detection circuit. The output end of the microprocessor is connected with a water pump control circuit, a fan control circuit and a heater control circuit. Besides, the microprocessor is also connected with two communication interface circuits, A and B. The communication interface circuit A is connected with a key input display unit.
Description
Technical field:
The utility model relates to a kind of intelligent controller that is used for evaporative condenser, especially a kind of reliable and stable operation that guarantees refrigeration system, reduces the evaporative condenser intelligence controlling device that working strength of workers, service data can realize that teletransmission is monitored then and can control many evaporative condensers simultaneously.
Background technology:
At present, the evaporative condenser in the conventional refrigeration all adopts manual control startup-shutdown to water pump, blower fan, well heater.When the discharge pressure of system changes, need artificially judge and manually control the operation platform number of water pump and blower fan and, manually control the heat time heating time of tank well heater according to evaporation cold rinse bank variation of temperature.Because evaporative condenser all is installed on the refrigerating plant room top, instrument such as pressure and temperature are installed near the equipment again, therefore observe and record data are very inconvenient, the operation is very loaded down with trivial details, and as discharge pressure or water temperature controlled the bad good refrigeration that then do not reach.Therefore, existing manual control mode can not guarantee the reliable and stable operation of refrigeration system, more can not the assurance system economical and energy saving of operation.Especially service data does not possess the ability of teletransmission, can not realize the operation of remote supervisory and control(ling) equipment, can not satisfy the requirement of market to information-based product.
Summary of the invention:
The utility model is in order to overcome the above-mentioned deficiency of existing in prior technology, invention a kind of guarantee refrigeration system reliable and stable operation, reduce the evaporative condenser intelligence controlling device that working strength of workers, service data can realize that teletransmission is monitored then and can control many evaporative condensers simultaneously.
Technical solution of the present utility model is: a kind of evaporative condenser intelligence controlling device, it is characterized in that: be provided with microprocessor, be connected to tank temperature sensing circuit, 4～20mA current detection circuit, water pump overload detection circuit, blower fan overload detection circuit, tank liquid level detection circuit, refrigeration with the input end of microprocessor and allow signal deteching circuit and winter operation signal deteching circuit; Be connected to water pump control circuit, draught fan control circuit, control circuit for heater with output end of microprocessor; Also be connected to 2 communication interface circuit A and B with microprocessor, be connected to button input display unit with communication interface circuit A.
Described water pump overload detection circuit, the blower fan overload detection circuit, the tank liquid level detection circuit, refrigeration allows signal deteching circuit and winter operation signal deteching circuit to be the switching value testing circuit, testing circuit is provided with operational amplifier IC44, the base stage of the output of operational amplifier IC44 and triode TR41 is joined, triode TR41 emitter is connected with the 5V power supply by resistance R 67, the input end of the collector of triode TR41 and multipath conversion integrated circuit (IC) 40 joins, two output pins of multipath conversion integrated circuit (IC) 40 respectively with resistance R 44, resistance R 45 is joined, resistance R 44, the other end of R45 respectively with capacitor C 44, capacitor C 45 is joined; Two output pins of multipath conversion integrated circuit (IC) 40 also join with diode D44, diode D45 and diode D46, diode D47 respectively, and two output pins of multipath conversion integrated circuit (IC) 40 also join with two output pins of multipath conversion integrated circuit (IC) 41.
Described 4～20mA current detection circuit is provided with operational amplifier IC44A, the base stage of the output of operational amplifier IC44A and triode TR41A is joined, triode TR41A emitter is connected with the 5V power supply by resistance R 67A, the input end of the collector of triode TR41A and multipath conversion integrated circuit (IC) 40A joins, and the output pin of multipath conversion integrated circuit (IC) 40A and resistance R 42, resistance R 91 and capacitor C 42 are joined; The output pin of multipath conversion integrated circuit (IC) 40A also joins with diode D42, diode D43, and the output pin of multipath conversion integrated circuit (IC) 40A also joins with the output pin of multipath conversion integrated circuit (IC) 41A.
Described water pump control circuit, draught fan control circuit, control circuit for heater are the relay output circuit, each circuit is provided with reverse buffer IC70, be connected with capacitor C 75, diode D70 and relay R LY70 with the IC70 pin, the electric contact of relay R LY70 and voltage dependent resistor (VDR) VDR70 join.
The utility model can have the characteristics of modularization, standardization, networking to the unified processing of the run signal of many evaporative condensers, centralized control.Can the real-time detecting system discharge pressure, the state of tank temperature, tank liquid level, water pump and blower fan, season pattern, refrigeration system running status, if system exhaust pressure is low, tank temperature height, tank liquid level are low, when the situations such as winter mode, apparatus overload that enter take place, microprocessor is made judgement automatically, but follow procedure is reported to the police or stopped the operation of relevant device and the input quantity of automatic control equipment automatically.The various inconvenience of having avoided manual detection control to be brought not only can save great amount of manpower, reduce labour intensity, and the equipment operation energy-saving effect are remarkable.The utility model also can be sent to central control room with all information by network communication mode, realizes the remote centralized control to all evapn cool equipment in the refrigeration system, has greatly improved work efficiency, satisfies the requirement of market informationization.
Description of drawings:
Fig. 1 is the schematic block circuit diagram of the utility model embodiment.
Fig. 2 is the switching value testing circuit wiring diagram of the utility model embodiment.
Fig. 3 is 4～20mA signaling conversion circuit schematic diagram of the utility model embodiment.
Fig. 4 is the utility model embodiment control circuit schematic diagram.
Fig. 5 is the utility model embodiment microcontroller circuit schematic diagram.
Embodiment:
Below in conjunction with description of drawings embodiment of the present utility model.As shown in Figure 1: be provided with microprocessor, be connected to tank temperature sensing circuit, 4～20mA current detection circuit, water pump overload detection circuit, blower fan overload detection circuit, tank liquid level detection circuit, refrigeration with the input end of microprocessor and allow signal deteching circuit and winter operation signal deteching circuit; Be connected to water pump control circuit, draught fan control circuit, control circuit for heater with output end of microprocessor; Also be connected to 2 communication interface circuit A and B with microprocessor, be connected to button input display unit with communication interface circuit A.Communication interface circuit B can join with the intelligence controlling device communication interface B of another set of evaporative condenser, to realize the group's control to many evaporative condensers.
Described water pump overload detection circuit, the blower fan overload detection circuit, the tank liquid level detection circuit, refrigeration allows signal deteching circuit and winter operation signal deteching circuit to be the switching value testing circuit, specifically circuit as shown in Figure 2: testing circuit is provided with operational amplifier IC44 (LM358), the base stage of the output of operational amplifier IC44 and triode TR41 is joined, triode TR41 emitter is connected with the 5V power supply by resistance R 67, the input end of the collector of triode TR41 and multipath conversion integrated circuit (IC) 40 (CD4051) joins, two output pins of multipath conversion integrated circuit (IC) 40 respectively with resistance R 44, resistance R 45 is joined, resistance R 44, the other end of R45 respectively with capacitor C 44, capacitor C 45 is joined; Two output pins of multipath conversion integrated circuit (IC) 40 also join with diode D44, diode D45 and diode D46, diode D47 respectively, and two output pins of multipath conversion integrated circuit (IC) 40 also join with two output pins of multipath conversion integrated circuit (IC) 41 (CD4051).Be connected to capacitor C 58, capacitor C 59 respectively with multipath conversion integrated circuit (IC) 40, multipath conversion integrated circuit (IC) 41, the 3 pin signals of IC41 and the A/D input end of microprocessor join.
The tank temperature sensing circuit is existing general temperature sensing circuit.
Described 4～20mA current detection circuit is as shown in Figure 3: be provided with operational amplifier IC44A (LM358), the base stage of the output of operational amplifier IC44A and triode TR41A is joined, triode TR41A emitter is connected with the 5V power supply by resistance R 67A, the input end of the collector of triode TR41A and multipath conversion integrated circuit (IC) 40A joins, and the output pin of multipath conversion integrated circuit (IC) 40A (CD4051) and resistance R 42, resistance R 91 and capacitor C 42 are joined; The output pin of multipath conversion integrated circuit (IC) 40A also joins with diode D42, diode D43, and the output pin of multipath conversion integrated circuit (IC) 40A also joins with the output pin of multipath conversion integrated circuit (IC) 41A (CD4051).Be connected to capacitor C 60, capacitor C 61 respectively with multipath conversion integrated circuit (IC) 40A, multipath conversion integrated circuit (IC) 41A.
Described water pump control circuit, draught fan control circuit, control circuit for heater are the relay output circuit as shown in Figure 4: each circuit is provided with reverse buffer IC70 (7407), be connected with capacitor C 75, diode D70 and relay R LY70 with the IC70 pin, the electric contact of relay R LY70 and voltage dependent resistor (VDR) VDR70 join.
As shown in Figure 5: micro-processor interface circuit constitutes all same prior art of communication interface circuit and other peripheral circuit by microprocessor IC1 (ATMEGA128L) and peripheral circuit thereof.Tank temperature sensing circuit, 4～20mA testing circuit, water pump overload detection circuit, blower fan overload detection circuit, tank liquid level detection circuit, refrigeration allow signal deteching circuit, winter operation signal deteching circuit, 17,18,19,31,32,58,59,60 pin with IC1 join respectively.Water pump control circuit, draught fan control circuit, control circuit for heater join with 4,5,6,7,8,9,14,15,16 pin of IC1 respectively.
Principle of work:
Tank temperature sensing circuit, 4～20mA testing circuit, water pump overload detection circuit, blower fan overload detection circuit, tank liquid level detection circuit, refrigeration allow the AD input end of signal deteching circuit, winter operation signal deteching circuit, access microprocessor IC1 (ATMEGA128L) to handle.
Microprocessor IC1 (ATMEGA128L) handles and outputs signal to each control circuit with various input signals and controls; control signal is carried out electric current through reverse buffer IC70 (7407) after by the D/A of microprocessor IC1 output and is amplified and drive relay R LY70 (5A/250V) closure/disconnection; then realize Based Intelligent Control, relay output-parallel voltage dependent resistor (VDR) VDR70 (LA275) protects the contact.
Can all information be sent to central control room by communication interface circuit A, realize remote centralized control all evapn cool equipment in the refrigeration system,
Claims (4)
1. evaporative condenser intelligence controlling device, it is characterized in that: be provided with microprocessor, be connected to tank temperature sensing circuit, 4～20mA current detection circuit, water pump overload detection circuit, blower fan overload detection circuit, tank liquid level detection circuit, refrigeration with the input end of microprocessor and allow signal deteching circuit and winter operation signal deteching circuit; Be connected to water pump control circuit, draught fan control circuit, control circuit for heater with output end of microprocessor; Also be connected to 2 communication interface circuit A and B with microprocessor, be connected to button input display unit with communication interface circuit A.
2. evaporative condenser intelligence controlling device according to claim 1, it is characterized in that: described water pump overload detection circuit, the blower fan overload detection circuit, the tank liquid level detection circuit, refrigeration allows signal deteching circuit and winter operation signal deteching circuit to be the switching value testing circuit, testing circuit is provided with operational amplifier IC44, the base stage of the output of operational amplifier IC44 and triode TR41 is joined, triode TR41 emitter is connected with the 5V power supply by resistance R 67, the input end of the collector of triode TR41 and multipath conversion integrated circuit (IC) 40 joins, two output pins of multipath conversion integrated circuit (IC) 40 respectively with resistance R 44, resistance R 45 is joined, resistance R 44, the other end of R45 respectively with capacitor C 44, capacitor C 45 is joined; Two output pins of multipath conversion integrated circuit (IC) 40 also join with diode D44, diode D45 and diode D46, diode D47 respectively, and two output pins of multipath conversion integrated circuit (IC) 40 also join with two output pins of multipath conversion integrated circuit (IC) 41.
3. evaporative condenser intelligence controlling device according to claim 1 and 2, it is characterized in that: described 4～20mA current detection circuit is provided with operational amplifier IC44A, the base stage of the output of operational amplifier IC44A and triode TR41A is joined, triode TR41A emitter is connected with the 5V power supply by resistance R 67A, the input end of the collector of triode TR41A and multipath conversion integrated circuit (IC) 40A joins, and the output pin of multipath conversion integrated circuit (IC) 40A and resistance R 42, resistance R 91 and capacitor C 42 are joined; The output pin of multipath conversion integrated circuit (IC) 40A also joins with diode D42, diode D43, and the output pin of multipath conversion integrated circuit (IC) 40A also joins with the output pin of multipath conversion integrated circuit (IC) 41A.
4. evaporative condenser intelligence controlling device according to claim 3, it is characterized in that: described water pump control circuit, draught fan control circuit, control circuit for heater are the relay output circuit, each circuit is provided with reverse buffer IC70, be connected with capacitor C 75, diode D70 and relay R LY70 with the IC70 pin, the electric contact of relay R LY70 and voltage dependent resistor (VDR) VDR70 join.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202315326U CN201327582Y (en) | 2008-12-11 | 2008-12-11 | Intelligent control device for evaporative condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202315326U CN201327582Y (en) | 2008-12-11 | 2008-12-11 | Intelligent control device for evaporative condenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201327582Y true CN201327582Y (en) | 2009-10-14 |
Family
ID=41179549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202315326U Expired - Fee Related CN201327582Y (en) | 2008-12-11 | 2008-12-11 | Intelligent control device for evaporative condenser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201327582Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734996A (en) * | 2011-04-12 | 2012-10-17 | 本溪光远环境工程有限公司 | Low-pressure vapor injection water absorption type refrigerating plant with automatic control function |
-
2008
- 2008-12-11 CN CNU2008202315326U patent/CN201327582Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734996A (en) * | 2011-04-12 | 2012-10-17 | 本溪光远环境工程有限公司 | Low-pressure vapor injection water absorption type refrigerating plant with automatic control function |
| CN102734996B (en) * | 2011-04-12 | 2014-07-30 | 本溪光远环境工程有限公司 | Low-pressure vapor injection water absorption type refrigerating plant with automatic control function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104134100B (en) | A kind of energy-saving management system based on cloud computing | |
| CN100523635C (en) | Intelligent cluster control system of central air-conditioning | |
| CN101520224A (en) | Intelligent energy-efficient air conditioner control system | |
| CN208025747U (en) | Central air conditioning water system variable-flow active energy-saving self-controlling system | |
| CN201416984Y (en) | Air conditioner remote control device with measurement function | |
| CN106440585B (en) | A kind of the intelligent comprehensive defroster and its implementation of net for air-source heat pump units | |
| CN201014677Y (en) | Central air-conditioning intelligent group control device | |
| CN201110954Y (en) | Air conditioner heating equipment operation situation energy-saving type monitoring metering system | |
| CN113915719A (en) | Real-time frequency conversion control method and controller for central air-conditioning water pump | |
| CN201327582Y (en) | Intelligent control device for evaporative condenser | |
| CN108826589A (en) | A kind of air conditioner intelligent control energy conserving system and power-economizing method | |
| CN1300517C (en) | Energy saving control system of frequency conversion in use for central air condition | |
| CN205137786U (en) | Building power -operated control and subitem measurement system | |
| CN208365752U (en) | A kind of central air-conditioning energy monitoring system | |
| CN201973820U (en) | Heat pipe energy-saving air conditioning unit controlled through outdoor air wet bulb temperature | |
| CN210441402U (en) | Automatic control device of air conditioning system | |
| CN107036232A (en) | A kind of hospital's water cool-storage technology system cold operational energy efficiency optimal control method and device | |
| CN206269290U (en) | A kind of intelligent fresh air enthalpy difference and heat exchanger variable air rate energy conserving system | |
| CN210861504U (en) | Air conditioning unit energy-saving system for cleaning factory building | |
| CN210569064U (en) | Heat recovery unit | |
| CN204373150U (en) | central air-conditioning automatic control device | |
| CN107036231A (en) | Cooling tower intelligent energy-saving control method in central air-conditioning monitoring system | |
| CN210663548U (en) | Comprehensive intelligent defrosting device for refrigeration house | |
| CN113074928A (en) | Distribution automation thing allies oneself with sensing system | |
| CN108592331B (en) | Cooling tower cold supply mode control method and system of air conditioning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091014 Termination date: 20100111 |