CN109779883B - Centrifugal fan cooling system - Google Patents
Centrifugal fan cooling system Download PDFInfo
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- CN109779883B CN109779883B CN201910020961.1A CN201910020961A CN109779883B CN 109779883 B CN109779883 B CN 109779883B CN 201910020961 A CN201910020961 A CN 201910020961A CN 109779883 B CN109779883 B CN 109779883B
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- cooler
- cooling air
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Abstract
The invention relates to a centrifugal fan cooling system which comprises a first cooler, a second cooler, a third cooler, an oil-gas barrel, a centrifugal fan, a frequency converter, a controller, a compressor, a temperature sensor TA and a temperature sensor TQ, wherein the first cooler is arranged at an air outlet at the top of the centrifugal fan, hot fluid a2 flowing out of the oil-gas barrel is subjected to heat exchange with cooling air bh2 exhausted by the centrifugal fan through the first cooler to generate hot fluid b2 and cooling air c2, then the cooling air c2 flows out of the cooling system, the hot fluid b2 flows into the second cooler to be subjected to heat exchange with the cooling air a to generate hot fluid c2 and cooling air b2, then the hot fluid c2 flows out of the cooling system to enter the compressor, and hot compressed air 2 flowing out of the oil-gas barrel flows into the third cooler. Compared with the prior art, the invention has the advantages that: the cooling efficiency is improved.
Description
Technical Field
The invention relates to the technical field of centrifugal fan cooling systems, in particular to a centrifugal fan cooling system.
Background
The compressor as described in fig. 1 sucks air for compression, a large amount of heat is generated in the compression process, and the hot fluid c0 enters the compressor for cooling and lubrication; the hot mixture one is then discharged to the oil and gas barrel, which then separates the hot mixture one into hot fluid a0 and hot compressed air one. The flow of hot fluid a0 is to the thermostatic valve and cooler 2. When the temperature of the hot fluid a0 is lower than the set temperature of the thermostatic valve, the hot fluid a0 enters the compressor; when the hot fluid a0 is higher than the set temperature of the thermostatic valve, the hot fluid a0 enters the cooler 2 to exchange heat with the cooling air a, and hot fluid b0 and cooling air b0 are generated; the hot fluid b0 enters a thermostatic valve, and the thermostatic valve mixes the hot fluid a0 and the hot fluid b0 into a hot fluid c0 which enters a compressor. The cooler 3 is filled with hot compressed air I flowing out of the oil gas barrel, the hot compressed air I enters the cooler 3 and exchanges heat with cooling air a sucked by the centrifugal fan to generate cold compressed air I and cooling air ba 0; the centrifugal fan mixes cooling air ba0 and cooling air b0 into cooling air c0, and cooling air c0 flows out of the cooler system.
The technology has simple structure and lower cost; however, when the temperature of the cooling air a is low, the amount of the cooling air a cannot be reduced by reducing the rotational speed of the centrifugal fan motor, and the power consumption of the cooler system cannot be reduced. Therefore, the temperature of the cooling air c0 is relatively low and is not constant even if the volume of the cooling air a is kept constant; is not favorable for heating.
The compressor as described in fig. 2 sucks air for compression, a large amount of heat is generated in the compression process, and the hot fluid c1 enters the compressor for cooling and lubrication; the hot mixture two is then discharged to the oil and gas barrel, which then separates the hot mixture two into hot fluid a1 and hot compressed air two. The flow of the hot fluid a1 exchanges heat with the cooler 2 and the cooling wind a to generate a hot fluid c1 and a cooling wind b 1; hot fluid c1 enters the compressor. The cooler 3 is filled with hot compressed air II flowing out of the oil gas barrel, the hot compressed air II enters the cooler 3 to exchange heat with cooling air a sucked by the centrifugal fan to generate cold compressed air II and cooling air ba 1; the centrifugal fan mixes cooling air ba1 and cooling air b1 into cooling air c1, and cooling air c1 flows out of the cooler system.
The outlet of compressor go out and install temperature sensor TH, temperature sensor TH is used for measuring the temperature of compressor exhaust heat mixture two, then TH compares the temperature signal who measures with the target temperature of controller after output control signal gives the converter, the power frequency of centrifugal fan motor is increased and decreased according to the control signal of controller to the converter, centrifugal fan motor adjusts centrifugal fan's rotational speed according to the power frequency that the converter provided, the difference of the actual temperature that realizes centrifugal fan amount of wind change and reduce TH and controller to its set target temperature.
When the temperature signal measured by the TH is lower than the target temperature of the controller, the controller sends a control signal to reduce the power frequency of the centrifugal fan motor; the rotating speed of the centrifugal fan is reduced, and the power consumption of the cooling system is reduced; when the temperature signal measured by the TH is higher than the target temperature of the controller, the controller sends a control signal to increase the power frequency of the centrifugal fan motor; the rotational speed of the centrifugal fan increases and the power consumption of the cooling system increases.
When the temperature of the cooling air a is lower, the technology can reduce the rotating speed of the centrifugal fan, thereby reducing the power consumption of the cooler; the efficiency of the cooling system is improved. The temperature of the cooling air c1 is higher than that of the cooling air c0, and is relatively constant; is more favorable for heating.
Disclosure of Invention
In order to further reduce the energy consumption of a cooling system and improve the temperature of cooling air c1, the technical scheme provided by the invention is as follows: a centrifugal fan cooling system comprises a first cooler, a second cooler, a third cooler, an oil-gas barrel, a centrifugal fan, a frequency converter, a controller, a compressor, a temperature sensor TA and a temperature sensor TQ, wherein the first cooler is arranged at an air outlet at the top of the centrifugal fan, hot fluid a2 flowing out of the oil-gas barrel is subjected to heat exchange with cooling air bh2 exhausted by the centrifugal fan through the first cooler to generate hot fluid b2 and cooling air c2, then the cooling air c2 flows out of the cooling system, the hot fluid b2 flows into the second cooler to be subjected to heat exchange with the cooling air a to generate hot fluid c2 and cooling air b2, and then the hot fluid c2 flows out of the cooling system to enter the compressor; the hot compressed air flows into the third cooler and exchanges heat with the cooling air a sucked by the centrifugal fan to generate cold compressed air 2 and cooling air ba 2; the centrifugal fan mixes the cooling air ba2 and the cooling air b2 into cooling air bh 2; a temperature sensor TA is arranged at the outlet of the cooling air c2, a temperature sensor TQ is arranged at the heat-mixing body discharged by the compressor,
the temperature signals of the temperature sensor TA and the temperature sensor TQ are compared with the target temperature of the controller and then control signals are output to the frequency converter, the frequency converter increases or decreases the power supply frequency of the centrifugal fan motor according to the control signals of the controller, the centrifugal fan motor adjusts the rotating speed of the centrifugal fan according to the power supply frequency provided by the frequency converter, and the change of the air volume of the centrifugal fan is realized to reduce the difference between the actual temperature of the temperature sensor TA and the temperature sensor TQ and the target temperature set by the controller for the temperature sensor TA and the temperature sensor TQ.
As an improvement, the centrifugal fan consists of centrifugal fan blades, a fan motor and a centrifugal fan bracket, and provides power for a cooling system in the flow direction of cooling air.
As a modification, the temperature sensor TA is a temperature sensor for measuring the cooling air c 2.
As an improvement, the temperature sensor TQ is a temperature sensor for measuring a thermal mixture.
As an improvement, the controller sets the target temperature for its temperature sensor TA to operate the discharge temperature of the compressor within the range allowed by the temperature sensor TQ, which is determined mainly by the lubricating oil composition, the material and structure of the compressor, and the operating environment temperature.
As an improvement, the second cooler can be separately split into the second cooler 2A and the second cooler 2B, and especially the second cooler is suitable for being large in size, so that the manufacture of the cooler is facilitated, and the pressure loss of the cooler system is reduced.
As a modification, the first cooler can be separately split into the first cooler 1A and the first cooler 1B.
As an improvement, the first cooler and the second cooler can be simultaneously and respectively split into two coolers.
After adopting the structure, the invention has the following advantages: the successive coolers are carried out through the two-stage coolers, so that the lower temperature of the hot fluid c2 discharged by the cooling system is obtained under the condition that the air volume of the cooling air c2 is the same, and the cooling efficiency of the cooling system is improved. The cooler system has the same heat exchange amount, and is smaller in size and lower in cost. The temperature of the cooling air c2 finally discharged from the cooling system is increased, and if the cooling air c2 is used for heating, the heating efficiency can be improved. When the temperature of the cooling air a is lower, when the hot fluid a2 measured by the control system according to the temperature sensor TQ is lower than the target temperature set by the controller, the rotating speed of the fan is reduced by the frequency converter, the power consumption of the cooler system is reduced along with the reduction, and the energy efficiency is improved; the temperature of the cooling air c2 is also higher than that of the cooling air c2, and a more stable target temperature can be obtained.
Drawings
FIG. 1 is a first schematic diagram of a centrifugal fan cooling system according to the prior art.
Fig. 2 is a schematic structural diagram of a centrifugal fan cooling system in the prior art.
Fig. 3 is a schematic structural diagram of a centrifugal fan cooling system according to the present invention.
Fig. 4 is a schematic structural diagram of a second cooler of the centrifugal fan cooling system according to the present invention, which is disassembled.
Fig. 5 is a disassembled structure diagram of the first cooler of the centrifugal fan cooling system of the invention.
Fig. 6 is a schematic structural view of the centrifugal fan cooling system according to the present invention, in which the first cooler and the second cooler are simultaneously separated.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
With reference to fig. 3, fig. 4, fig. 5 and fig. 6.
The invention is implemented concretely, the centrifugal fan cooling system comprises a first cooler 1, a second cooler 2, a third cooler 3, an oil-gas barrel, a centrifugal fan, a frequency converter, a controller, a compressor, a temperature sensor TA and a temperature sensor TQ, wherein the first cooler 1 is arranged at an air outlet at the top of the centrifugal fan, hot fluid a2 flowing out of the oil-gas barrel is subjected to heat exchange with cooling air bh2 exhausted by the centrifugal fan through the first cooler 1 to generate hot fluid b2 and cooling air c2, then the cooling air c2 flows out of the cooling system, the hot fluid b2 flows into the second cooler 2 to perform heat exchange with the cooling air a to generate hot fluid c2 and cooling air b2, and then the hot fluid c2 flows out of the cooling system to enter the compressor; the hot compressed air flowing out of the oil gas barrel flows into the third cooler 3, enters the third cooler 3 and exchanges heat with the cooling air a sucked by the centrifugal fan to generate cold compressed air 2 and cooling air ba 2; the centrifugal fan mixes the cooling air ba2 and the cooling air b2 into cooling air bh 2; the outlet of the cooling air c2 is provided with a temperature sensor TA, the exhaust heat mixture of the compressor is provided with a temperature sensor TQ, the temperature signals of the temperature sensor TA and the temperature sensor TQ are compared with the target temperature of the controller and then output control signals to the frequency converter, the frequency converter increases or decreases the power frequency of the centrifugal fan motor according to the control signals of the controller, the centrifugal fan motor adjusts the rotating speed of the centrifugal fan according to the power frequency provided by the frequency converter, and the change of the air volume of the centrifugal fan is realized to reduce the difference value between the actual temperature of the temperature sensor TA and the temperature sensor TQ and the target temperature set by the controller.
The centrifugal fan is composed of centrifugal fan blades, a fan motor and a centrifugal fan support and provides power for a cooling system in the flow direction of cooling air.
The temperature sensor TA is a temperature sensor for measuring the cooling air c 2.
The temperature sensor TQ is a temperature sensor for measuring a thermal mixture.
The second cooler 2 can be separately split into a second cooler 2A and a second cooler 2B.
The first cooler 1 can be separately split into a first cooler 1A and a first cooler 1B.
The first cooler 1 and the second cooler 2 can be simultaneously and respectively split into two coolers.
The working principle of the invention is as follows: as shown in fig. 3, a first cooler 1 is placed at an air outlet at the top of a centrifugal fan, a hot fluid a2 flowing out of an oil-gas barrel is subjected to heat exchange with cooling air bh2 discharged by the centrifugal fan through the first cooler 1 to generate a hot fluid b2 and cooling air c2, then the cooling air c2 flows out of a cooling system, the hot fluid b2 flows into a second cooler 2 to be subjected to heat exchange with the cooling air a to generate a hot fluid c2 and cooling air b2, and then the hot fluid c2 flows out of the cooling system to enter a compressor; the hot compressed air flowing out of the oil gas barrel flows into the third cooler 3, enters the third cooler 3 and exchanges heat with the cooling air a sucked by the centrifugal fan to generate cold compressed air 2 and cooling air ba 2; the centrifugal fan mixes the cooling air ba2 and the cooling air b2 into cooling air bh 2; the outlet of the cooling air c2 is provided with a temperature sensor TA, the exhaust heat-mixing body of the compressor is provided with a temperature sensor TQ, the temperature signals of the temperature sensor TA and the temperature sensor TQ are compared with the target temperature of the controller and then output control signals to the frequency converter, the frequency converter increases or decreases the power frequency of the centrifugal fan motor according to the control signals of the controller, the centrifugal fan motor adjusts the rotating speed of the centrifugal fan according to the power frequency provided by the frequency converter, and the change of the air volume of the centrifugal fan is realized to reduce the difference value between the actual temperature of the temperature sensor TA and the temperature sensor TQ and the target temperature set by the controller to the temperature sensor TA and the temperature sensor TQ.
When the temperature signal measured by the temperature sensor TA is lower than the target temperature of the controller, the controller sends a control signal to gradually reduce the power frequency of the centrifugal fan motor; the rotating speed of the centrifugal fan is gradually reduced to gradually reduce the air volume of the cooling air a; at the moment, the temperature of the temperature sensor TA is also gradually increased, and the power consumption of the cooling system is gradually reduced; however, the temperature of the temperature sensor TA is gradually increased while the temperature of the temperature sensor TQ is also gradually increased, and if the temperature of the temperature sensor TQ reaches or exceeds the maximum target temperature, the temperature sensor TA does not reach the target temperature yet, and the controller stops sending a signal for reducing the power frequency of the centrifugal fan motor.
When the temperature signal measured by the temperature sensor TA is higher than the target temperature of the controller, the controller sends a control signal to gradually increase the power frequency of the centrifugal fan motor; the rotating speed of the centrifugal fan is gradually increased to gradually increase the air volume of the cooling air a; at the moment, the temperature of the temperature sensor TA is also gradually reduced, and the power consumption of the cooling system is gradually increased; however, the temperature of the temperature sensor TA is gradually decreased while the temperature of the temperature sensor TQ is also gradually decreased, and if the temperature of the temperature sensor TQ reaches or is lower than the lowest target temperature, the temperature sensor TA does not reach the target temperature yet, and the controller stops sending a signal for increasing the power frequency of the centrifugal fan motor.
The hot fluid a4 shown in fig. 4 flows into the first cooler 1 to exchange heat with the cooling air bh4 to generate hot fluid b4 and cooling air c 41. Then the cooling air c41 flows out of the cooler system, the hot fluid b4 is divided into two paths, one path flows into the second cooler A to exchange heat with the cooling air a, and hot fluid c4a and cooling air b4a are generated; one of the flows enters the second cooler 2B to exchange heat with the cooling wind a, and a hot fluid c4B and a cooling wind B4B are generated. Then cooling air b4a, b4b and ba4 are mixed by the rotation of the centrifugal fan into cooling air bh4 and then flow into the first cooler 1 to exchange heat with the hot fluid a 4; and the hot fluids c4a and c4b flow out of the cooling system together and enter the compressor for cooling and lubrication.
As shown in fig. 5, the hot fluid a3 is divided into two paths, one hot fluid a3 flows into the first cooler 1A to exchange heat with the cooling air bh3 to generate the hot fluid B3a and the cooling air c3a, and one hot fluid a3 flows into the first cooler 1B to exchange heat with the cooling air bh3 to generate the hot fluid B3B and the cooling air c 3B. The cooling winds c3a and c3b then exit the chiller system. And the hot fluid b3a and b3b flow into the second cooler 2 together to exchange heat with the cooling air a, so that a hot fluid c3 and a cooling air b3 are generated; then cooling air B3 and ba3 are mixed by the centrifugal fan to form cooling air bh3 in a rotating manner, and then flow into the first cooler 1A and the first stage 1B to exchange heat with hot fluid a 3; and the hot fluid c3 flows out of the cooling system to enter the compressor body for cooling and lubrication.
As shown in fig. 6, the hot fluid a6 is divided into two paths, one hot fluid a6 flows into the first cooler 1A to exchange heat with the cooling air bh6 to generate a hot fluid b61 and a cooling air c6a, and then the hot fluid a61 flows into the second cooler a to exchange heat with the cooling air a to generate a hot fluid c6a and a cooling air b6 a. One path of hot fluid a6 flows into the first cooler 1B to exchange heat with cooling air bh6 to generate hot fluid B62 and cooling air c6B, and then hot fluid B62 flows into the second cooler 2B to exchange heat with cooling air a to generate hot fluid c6B and cooling air B6B. Then cooling air c6a and c6b flows out of the cooler system; and the hot fluids c6a and c6b flow out of the cooling system together to enter the compressor body for cooling and lubrication.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A centrifugal fan cooling system, characterized by: the oil-gas separator comprises a first cooler, a second cooler, a third cooler, an oil-gas barrel, a centrifugal fan, a frequency converter, a controller, a compressor, a temperature sensor TA and a temperature sensor TQ, wherein the first cooler is arranged at an air outlet at the top of the centrifugal fan, hot fluid a2 flowing out of the oil-gas barrel is subjected to heat exchange with cooling air bh2 exhausted by the centrifugal fan through the first cooler to generate hot fluid b2 and cooling air c2, then the cooling air c2 flows out of a cooling system, the hot fluid b2 flows into the second cooler to perform heat exchange with the cooling air a to generate hot fluid c2 and cooling air b2, and then the hot fluid c2 flows out of the cooling system to enter the compressor; the hot compressed air flows into the third cooler and exchanges heat with the cooling air a sucked by the centrifugal fan to generate cold compressed air and cooling air ba 2; the centrifugal fan mixes the cooling air ba2 and the cooling air b2 into cooling air bh 2; the outlet of the cooling air c2 is provided with a temperature sensor TA, the exhaust heat mixture of the compressor is provided with a temperature sensor TQ, the temperature signals of the temperature sensor TA and the temperature sensor TQ are compared with the target temperature of the controller and then output control signals to the frequency converter, the frequency converter increases or decreases the power frequency of the centrifugal fan motor according to the control signals of the controller, the centrifugal fan motor adjusts the rotating speed of the centrifugal fan according to the power frequency provided by the frequency converter, and the change of the air volume of the centrifugal fan is realized to reduce the difference between the actual temperature measured by the temperature sensor TA and the temperature sensor TQ and the target temperature set by the controller for the temperature sensor TA and the temperature sensor TQ.
2. A centrifugal fan cooling system as claimed in claim 1, wherein: the temperature sensor TA is a temperature sensor for measuring the cooling air c 2.
3. A centrifugal fan cooling system as claimed in claim 1, wherein: the temperature sensor TQ is used for measuring the temperature of the heat mixture discharged by the compressor.
4. A centrifugal fan cooling system as claimed in claim 1, wherein: the second cooler is separately disassembled into two coolers.
5. A centrifugal fan cooling system as claimed in claim 1, wherein: the first cooler is separately disassembled into two coolers.
6. A centrifugal fan cooling system as claimed in claim 1, wherein: the first cooler and the second cooler are simultaneously and respectively split into two coolers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910020961.1A CN109779883B (en) | 2019-01-09 | 2019-01-09 | Centrifugal fan cooling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910020961.1A CN109779883B (en) | 2019-01-09 | 2019-01-09 | Centrifugal fan cooling system |
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| CN109779883A CN109779883A (en) | 2019-05-21 |
| CN109779883B true CN109779883B (en) | 2020-07-07 |
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| CN201910020961.1A Active CN109779883B (en) | 2019-01-09 | 2019-01-09 | Centrifugal fan cooling system |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3383967B2 (en) * | 1994-10-19 | 2003-03-10 | 北越工業株式会社 | Soundproof air compressor |
| CN201401311Y (en) * | 2009-04-25 | 2010-02-10 | 赵德文 | Waste heat recovery device of oil injection rotary air compressor |
| CN203335412U (en) * | 2013-05-14 | 2013-12-11 | 晶澳太阳能有限公司 | Air compressor combined cooling device |
| CN203516008U (en) * | 2013-06-19 | 2014-04-02 | 刘志红 | Dual-recovery system for oil and gas heat |
| CN103696967B (en) * | 2013-12-25 | 2015-09-09 | 烟台只楚红星压缩机有限公司 | A kind of energy-efficient dual-function screw air compressor |
| CN105508247A (en) * | 2016-01-21 | 2016-04-20 | 萨震压缩机（上海）有限公司 | Energy-saving air compressor |
| WO2018025368A1 (en) * | 2016-08-04 | 2018-02-08 | 株式会社日立産機システム | Oil-fed air compressor |
| CN207500085U (en) * | 2017-10-19 | 2018-06-15 | 爱景节能科技（上海）有限公司 | Double type of cooling air compressor machines |
| CN108626119A (en) * | 2018-06-28 | 2018-10-09 | 广东艾林克能源装备有限公司 | A kind of intelligence air compression system |
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