CN204648533U - The degenerative intelligent frequency-conversion central air conditioning system of a kind of backwater - Google Patents
The degenerative intelligent frequency-conversion central air conditioning system of a kind of backwater Download PDFInfo
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- CN204648533U CN204648533U CN201520367580.8U CN201520367580U CN204648533U CN 204648533 U CN204648533 U CN 204648533U CN 201520367580 U CN201520367580 U CN 201520367580U CN 204648533 U CN204648533 U CN 204648533U
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Abstract
The degenerative intelligent frequency-conversion central air conditioning system of a kind of backwater, its technical essential: coolant pump connects by cooling water outlet pipe the water tower that dries in the air, and be provided with cooling fan above the water tower that dries in the air, the water tower that dries in the air is by cooling back cross current refrigeration unit, circulating pump is connected by the air conditioner of freezing outlet pipe with refrigeration terminal, air conditioner is communicated with refrigeration unit by freezing return pipe, refrigeration unit connects coolant pump and circulating pump, cool back on water pipe and establish cooling-water temperature sensor, freezing return pipe is established chilled water temperature sensor, cooling-water temperature sensor and chilled water temperature sensor connect PLC through A/D converter respectively, cooling-water temperature sensor connects PID controller, PID controller connects cooling fan, PLC connects cooling water frequency converter and chilled water frequency converter respectively through D/A converter, cooling water frequency converter connects coolant pump, chilled water frequency converter connects circulating pump.The utility model can improve system rejection to disturbance, elevator system stability.
Description
Technical field:
The utility model provides a kind of central air conditioning system, is specifically related to the degenerative intelligent frequency-conversion central air conditioning system of a kind of backwater.
Background technology:
In the last few years, China had built a collection of large-scale high-end public building, generally have employed handpiece Water Chilling Units central air-conditioning refrigeration modes, and this technology, apart from the history of modern existing more than 100 year, is the technology that application the most general one in market is ripe.But, along with current people are more and more concerned about the problems such as energy-conserving and environment-protective, the shortcoming of original solutions for refrigeration also just revealing gradually.According to statistics, the power consumption of central air-conditioning accounts for more than the 30%-60% of all kinds of heavy construction total electricity consumption, and therefore, the reducing energy consumption of central air conditioner system has become very necessary.
At present, PLC intelligent frequency-conversion technology is generally used in central air conditioner system, although PLC intelligent frequency-conversion technology substantially increases the energy saving capability of central air conditioner system, its energy-saving effect also has room for promotion, and its system itself also also exists by the larger shortcoming of environmental disturbances.
Summary of the invention:
The utility model provides the degenerative intelligent frequency-conversion central air conditioning system of a kind of backwater, and it affects little by environmental fluctuating, can improve system rejection to disturbance, simultaneously the stability of elevator system.
The degenerative intelligent frequency-conversion central air conditioning system of backwater of the present utility model, technical scheme adopted for achieving the above object is: comprise refrigeration unit, coolant pump, circulating pump, the water tower that dries in the air, compressor and air conditioner, coolant pump connects by cooling water outlet pipe the water tower that dries in the air, dry in the air above water tower and be provided with cooling fan, dry in the air water tower lower end with cool back water pipe and be connected, cool back water pipe and be connected with refrigeration unit, circulating pump is connected by the air conditioner of freezing outlet pipe with refrigeration terminal, air conditioner is connected with freezing return pipe, freezing return pipe is connected with refrigeration unit, refrigeration unit connects coolant pump, circulating pump and compressor, the described water pipe that cools back is provided with cooling-water temperature sensor, described freezing return pipe is provided with chilled water temperature sensor, described cooling-water temperature sensor is connected PLC with chilled water temperature sensor respectively by A/D converter, cooling-water temperature sensor connects PID controller, PID controller connects cooling fan, PLC connects cooling water frequency converter and chilled water frequency converter respectively by D/A converter, cooling water frequency converter connects coolant pump, chilled water frequency converter connects circulating pump.
As further improvement of the utility model, the quantity of described cooling fan is 4, can reduce the temperature flowing into the water dried in the air in water tower when starting fast simultaneously.
As further improvement of the utility model, described cooling-water temperature sensor is connected A/D converter with chilled water temperature sensor respectively by signal condition amplification module, to improve the accuracy of signal transmission.
As further improvement of the utility model, described compressor is centrifugal compressor, and its treating capacity is large, can export the water in refrigeration unit fast.
As further improvement of the utility model, be provided with coil pipe in described air conditioner, coil pipe is connected with freezing return pipe with freezing outlet pipe respectively, and coil pipe can extend the stroke of chilled water, reaches the object of fully refrigeration.
As further improvement of the utility model, described air conditioner is provided with refrigerating fan, the cold air around coil pipe can be blown into rapidly in the room at air conditioner place.
The beneficial effects of the utility model are: what refrigeration unit of the present utility model adopted is the large-scale refrigeration unit with temperature detection automatic regulating load function, freezing return pipe installs additional chilled water temperature sensor, PLC regulates the rotating speed of circulating pump by chilled water frequency converter according to the temperature value detected, and then regulate the temperature of chilled water; Install cooling-water temperature sensor additional cooling back on water pipe, PLC regulates the rotating speed of coolant pump by cooling water frequency converter according to the temperature value detected, and then regulate the temperature of cooling water.When the return water temperature of cooling water is more than 26 degrees Celsius, it is the cooling water temperature dried in the air in water tower that PID controller can start cooling fan, the return water temperature of cooling water often raises a threshold and can start a cooling fan more, until 4 cooling fans all start, by the startup of cooling fan, then coordinate the rotating speed of coolant pump to reduce the temperature of backwater.By the design of this part, the object that cooling water circulation Based Intelligent Control and cooling fan control automatically can be realized, improve the stability of system.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is control principle block diagram of the present utility model.
Detailed description of the invention:
See figures.1.and.2, the degenerative intelligent frequency-conversion central air conditioning system of this backwater, comprise refrigeration unit 1, coolant pump 2, circulating pump 3, the water tower 4 that dries in the air, compressor 5 and air conditioner 6, coolant pump 2 connects by cooling water outlet pipe 7 water tower 4 that dries in the air, dry in the air above water tower 4 and be provided with 4 cooling fans 8, dry in the air water tower 4 lower end with cool back water pipe 9 and be connected, cool back water pipe 9 and be connected with refrigeration unit 1; Described air conditioner 6 is provided with refrigerating fan 62, coil pipe 61 is provided with in described air conditioner 6, circulating pump 3 is connected with coil pipe 61 by freezing outlet pipe 10, coil pipe 61 is connected with freezing return pipe 11, freezing return pipe 11 is connected with refrigeration unit 1, refrigeration unit 1 connects coolant pump 2, circulating pump 3 and compressor 5, and described compressor 5 is centrifugal compressor.The described water pipe 9 that cools back is provided with cooling-water temperature sensor 12, described freezing return pipe 11 is provided with chilled water temperature sensor 13, described cooling-water temperature sensor 12 is connected A/D converter 14 with chilled water temperature sensor 13 respectively by signal condition amplification module 21, A/D converter 14 connects PLC 15, cooling-water temperature sensor 12 connects PID controller 20, PID controller 20 connects cooling fan 8, PLC 15 connects cooling water frequency converter 18 and chilled water frequency converter 19 respectively by D/A converter 17, cooling water frequency converter 18 connects coolant pump 2, chilled water frequency converter 19 connects circulating pump 3.
The temperature signal collected is passed to A/D converter 14 and carries out analog-to-digital conversion by chilled water temperature sensor 13 after signal adjustment amplification module 21 adjusts amplification, digital signal transfers after conversion is to PLC 15, by PLC 15 through computing, the result of computing is carried out digital-to-analogue conversion through D/A converter 17, analog signal after conversion passes to chilled water frequency converter 19, the rotating speed of circulating pump 3 is regulated and controled by chilled water frequency converter 19, the flow velocity of the chilled water flowed out from refrigeration unit 1 is changed by the rotating speed changing circulating pump 3, cooling coil 61 ambient air is carried out by chilled water, by refrigerating fan 62, the Cryogenic air after cooling is sent into indoor again and reach refrigeration.The chilled water be warmed flowed out in coil pipe 61 flows back in refrigeration unit 1 through freezing return pipe 11 again, so moves in circles to carry out refrigeration cool-down to chilled water.The rotating speed of circulating pump 3 is faster, and the flow velocity of chilled water is faster, will produce more cold air reduce indoor temperature by air conditioner 6.
The temperature signal collected is divided into two parts by cooling-water temperature sensor 12: a part is similar with chilled water temperature sensor 13, the temperature signal collected is adjusted after amplification through signal condition amplification module 21 and passes to A/D converter 14, digital signal transfers is converted to PLC 15 through A/D converter 14, by PLC 15 through computing, the result of computing is changed into analog signal through D/A converter 17 and passes to cooling water frequency converter 18, the rotating speed of coolant pump 2 is regulated and controled by cooling water frequency converter 18, the flow velocity of cooling water is regulated by the rotating speed of coolant pump 2, another part temperature signal is after PID controller process, be transformed into the control signal controlling the cooling fan 8 dried in the air on water tower 4, the start and stop number of controlled cooling model fan 8 is carried out by control signal, according to the size of the temperature value that cooling-water temperature sensor 12 gathers, determine the start and stop number of cooling fan 8, the temperature of the water dried in the air in water tower 4 is reduced by cooling fan 8, the water dried in the air in water tower 4 after cooling flows in refrigeration unit 1 by cooling back water pipe 9, after cooling water flows out from refrigeration unit 1, heat can be taken away from refrigeration unit 1, thus refrigeration unit 1 is cooled.Cooling water after the intensification of flowing out in refrigeration unit 1 is again squeezed into by coolant pump 2 and is dried in the air in water tower 4, when being sprayed by cooling water outlet pipe 7, by cooling fan 8 again for it is lowered the temperature, accelerate the speed of cooling water and air heat exchange, again being flowed in refrigeration unit 1 by cooling back water pipe 9 by the cooling water after Air flow, so moving in circles as refrigeration unit 1 is lowered the temperature.When cooling water return water temperature raises, coolant pump 2 rotating speed is accelerated gradually, and the number that cooling fan 8 starts also can correspondingly increase, and reaches to the object of cooling water effective temperature-reducing.
Claims (6)
1. the degenerative intelligent frequency-conversion central air conditioning system of backwater, it is characterized in that: comprise refrigeration unit (1), coolant pump (2), circulating pump (3), the water tower that dries in the air (4), compressor (5) and air conditioner (6), coolant pump (2) connects by cooling water outlet pipe (7) water tower (4) that dries in the air, dry in the air water tower (4) top be provided with cooling fan (8), dry in the air water tower (4) lower end with cool back water pipe (9) and be connected, cool back water pipe (9) and be connected with refrigeration unit (1), circulating pump (3) is connected by the air conditioner (6) of freezing outlet pipe (10) with refrigeration terminal, air conditioner (6) is connected with freezing return pipe (11), freezing return pipe (11) is connected with refrigeration unit (1), refrigeration unit (1) connects coolant pump (2), circulating pump (3) and compressor (5), the described water pipe (9) that cools back is provided with cooling-water temperature sensor (12), described freezing return pipe (11) is provided with chilled water temperature sensor (13), described cooling-water temperature sensor (12) is connected PLC (15) with chilled water temperature sensor (13) respectively by A/D converter (14), cooling-water temperature sensor (12) connects PID controller (20), PID controller (20) connects cooling fan (8), PLC (15) connects cooling water frequency converter (18) and chilled water frequency converter (19) respectively by D/A converter (17), cooling water frequency converter (18) connects coolant pump (2), chilled water frequency converter (19) connects circulating pump (3).
2. the degenerative intelligent frequency-conversion central air conditioning system of a kind of backwater as claimed in claim 1, is characterized in that: the quantity of described cooling fan (8) is 4.
3. the degenerative intelligent frequency-conversion central air conditioning system of a kind of backwater as claimed in claim 1, is characterized in that: described cooling-water temperature sensor (12) is connected A/D converter (14) with chilled water temperature sensor (13) respectively by signal condition amplification module (21).
4. the degenerative intelligent frequency-conversion central air conditioning system of a kind of backwater as claimed in claim 1, is characterized in that: described compressor (5) is centrifugal compressor.
5. the degenerative intelligent frequency-conversion central air conditioning system of a kind of backwater as claimed in claim 1, it is characterized in that: be provided with coil pipe (61) in described air conditioner (6), coil pipe (61) is connected with freezing return pipe (11) with freezing outlet pipe (10) respectively.
6. the degenerative intelligent frequency-conversion central air conditioning system of a kind of backwater as claimed in claim 1, is characterized in that: described air conditioner (6) is provided with refrigerating fan (62).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520367580.8U CN204648533U (en) | 2015-06-01 | 2015-06-01 | The degenerative intelligent frequency-conversion central air conditioning system of a kind of backwater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520367580.8U CN204648533U (en) | 2015-06-01 | 2015-06-01 | The degenerative intelligent frequency-conversion central air conditioning system of a kind of backwater |
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| CN204648533U true CN204648533U (en) | 2015-09-16 |
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| CN201520367580.8U Expired - Fee Related CN204648533U (en) | 2015-06-01 | 2015-06-01 | The degenerative intelligent frequency-conversion central air conditioning system of a kind of backwater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107166587A (en) * | 2017-05-31 | 2017-09-15 | 四川建源节能科技有限公司 | A kind of new blower fan system of intelligent frequency-conversion based on PLC |
| CN112403173A (en) * | 2019-08-21 | 2021-02-26 | 陕西青朗万城环保科技有限公司 | Large-air-volume gas cooling device control system |
-
2015
- 2015-06-01 CN CN201520367580.8U patent/CN204648533U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107166587A (en) * | 2017-05-31 | 2017-09-15 | 四川建源节能科技有限公司 | A kind of new blower fan system of intelligent frequency-conversion based on PLC |
| CN112403173A (en) * | 2019-08-21 | 2021-02-26 | 陕西青朗万城环保科技有限公司 | Large-air-volume gas cooling device control system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 Termination date: 20180601 |