CN204555398U - Cooling fluid air blast cooling regulating system - Google Patents
Cooling fluid air blast cooling regulating system Download PDFInfo
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- CN204555398U CN204555398U CN201520025338.2U CN201520025338U CN204555398U CN 204555398 U CN204555398 U CN 204555398U CN 201520025338 U CN201520025338 U CN 201520025338U CN 204555398 U CN204555398 U CN 204555398U
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Abstract
The utility model discloses a kind of cooling fluid air blast cooling regulating system, include magnetic valve, pressure-difference valve, heat exchanger, overflow valve and provide the blower fan of heat radiation for heat exchanger, heat exchanger includes fin, be in parallel and the long tube bunch interted mutually and short tube bunch, the entrance of long tube bunch, the entrance of magnetic valve, the entrance of pressure-difference valve, draw after the entrance of overflow valve is in parallel, form cooling fluid entrance, after the outlet of magnetic valve and the outlet of pressure-difference valve are in parallel, be connected with the entrance of short tube bunch, the outlet of the outlet of long tube bunch and short tube bunch is in parallel, draw after being in parallel with the outlet of overflow valve again, form cooling liquid outlet.The utility model compact conformation, realization is easy, cost is low, energy saving in running, safety, effectively control the cold-starting flow resistance of heat exchanger, ensure that system works is normal, by pressure-difference valve, the heat-sinking capability of heat exchanger can be played comprehensively, benefit is brought to the optimization of Iarge-scale system feed flow, as more reasonable in selecting of pump.
Description
Technical field
The utility model relates to the cold liquid machine field that a class forced air cooling heat transmission equipment and a class have cooling fluid air blast cooling function, is specifically applicable to a kind of cooling fluid air blast cooling regulating system of each class of electronic devices forcing functions.
Background technology
In recent years, along with the fast development of electronic equipment, the particularly upgrading of military and extraordinary electronic equipment, more and more higher to the demand of its reliability and the aspect such as energy-conservation, also there is new change in heat transmission equipment supporting with it, cold liquid machine etc. thereupon.At present, the type of cooling of electronic equipment is mainly selected from heat flow density, power density, power consumption, surface area, volume, working environment and other specific condition, and common method has: cooling, forcing functions, evaporative cooling, thermoelectric cooling and adopting heat pipes for heat transfer etc. naturally.Wherein, cooling fluid air blast cooling, as a kind of forcing functions, because its cooling effect is good, and is widely adopted.As the vitals in cooling fluid air blast cooling, i.e. heat exchanger, be usually placed in outdoor, work as winter approached, under being located in severe low temperature environment especially, before equipment is not opened, just by deep colling.In heat exchanger, cooling fluid is become very thick, directly opens pump and often can not circulate.In this case, common way is: the power 1. increasing pump, improves for fluid head; 2. pump design bypass is opened, but in heat exchanger, cooling fluid viscosity does not solve; 3., in heat exchanger, electric heating tube etc. is inserted.
Such as, 66%(mass ratio) glycol water, during liquid temperature 27.5 DEG C, kinematic viscosity υ=4.69 × 10-6 m2/s; When liquid temperature is down to-35 DEG C, kinematic viscosity υ=96.52 × 10-6 m2/s; Kinematic viscosity increases about 20.5 times.If heat exchanger adopts Ф 9.52 × 0.5 finned heat exchanger, tube bundle is light pipe, and single channel tube length design is 12 m, and 18 180 ° of elbows, velocity in pipes is 1.5 m/s.Utilize hydrodynamics associated fluid frictional resistance to estimate, when liquid temperature 27.5 DEG C, flow resistance is about 1.3 bar; When liquid temperature-35 DEG C, flow resistance is about 15 bar, even if flow velocity is declined 50%, flow resistance still has about 7.5 bar.Such result, select pump to have an impact to system comparatively large, if select by low temperature flow resistance, power certainly will be much bigger than normal; If select by normal temperature flow resistance, more can be with and serve negative effect, even damage pump; If select variable frequency pump, also select high-power pump because meeting low temperature flow resistance, affecting volume and weight, simultaneously to the anti-low temperature of the electrical parts such as frequency converter, vibration, impact, the problem such as reliability and electromagnetic compatibility, also can bring the increase of risk factor.How to solve the reliability of equipment under adverse circumstances, embody again energy-conservation, merit attention.
Utility model content
The purpose of this utility model solves prior art Problems existing, provides a kind of cooling fluid air blast cooling regulating system, realize the adjustable, controlled of heat exchanging system, have high reliability operation characteristic.
The technical solution of the utility model is as follows:
A kind of cooling fluid air blast cooling regulating system, it is characterized in that: include magnetic valve, pressure-difference valve, heat exchanger, overflow valve and provide the blower fan of heat radiation for described heat exchanger, described heat exchanger includes fin, be in parallel and the long tube bunch interted mutually and short tube bunch, the entrance of described long tube bunch, the entrance of magnetic valve, the entrance of pressure-difference valve, draw after the entrance of overflow valve is in parallel, form cooling fluid entrance, after the outlet of described magnetic valve and the outlet of pressure-difference valve are in parallel, be connected with the entrance of described short tube bunch, the outlet of the outlet of described long tube bunch and short tube bunch is in parallel, draw after being in parallel with the outlet of described overflow valve again, form cooling liquid outlet.
Otherwise cooling fluid entrance and exit exchanges, and principle is identical, notice that device flows to.In the cold-starting phase, short tube bunch plays bypass, preheating and the effect of reduction flow resistance; In normal duty cycle, together with short tube bunch and long tube bunch, complete heat sinking function.
In the cold-starting phase, as-40 DEG C, cooling fluid by bypass to the little short tube of flow resistance bunch, makes feed flow not be obstructed by magnetic valve, simultaneously by heat exchanger fin by heat conduction to long tube bunch, progressively reduce the viscosity of cooling fluid in long tube bunch, realize preheating, when the flow resistance in long tube bunch meets the demands, preheating completes, starting period terminates, and enters normal duty cycle.In normal duty cycle, utilize pressure-difference valve, make long tube in heat exchanger bunch and short tube bunch to return liquid temp suitable, the maximum exchange capability of heat of both performances.
The utility model also can merge with vapour compression refrigeration mode, shares blower fan, forms the cold liquid machine with the air blast cooling of compression mechanism cold-peace.
Further, in described heat exchanger, described fin uniformly at intervals between described long tube bunch and short tube bunch, i.e. the long tube bunch of heat exchanger and short tube bunch shared fin, described short tube is bunch uniformly at intervals in described long tube bunch; Point index such as way and pipe range of short tube bunch is to meet under low temperature flow resistance and preheating for design considerations, if the reserved liquid supply pressure surplus of system, then short tube bunch low temperature flow resistance should be suitable with the flow resistance of long tube under normal temperature bunch; General short tube bunch length is 10% ~ 35% of long tube bunch length.
In the utility model, heat exchanger is heat exchanger common in air-conditioning or cold liquid machine, and tube bundle is generally triangle fork row.Mainly in the layout and design of long tube bunch and short tube bunch, there is himself feature.Wherein, the index such as point way, caliber, single channel pipe range of long tube cocooning tool body should to meet user's requirement, if total heat dissipation capacity and bulk etc. are major design foundation; And the Main Function of short tube bunch is low temperature bypass, preheating and reduction flow resistance, so emphasis should consider convection current resistance design.
Here, point way of short tube bunch and the design of single channel pipe range are crucial, should with maximum flow resistance assigned under low temperature for design input.As, Iarge-scale system has reserved certain liquid supply pressure, and being assigned to heat exchanger is 0.5 bar, then can consider 0.5 bar when short tube bunch low temperature flow resistance designs more; If reserved liquid supply pressure surplus, then short tube bunch low temperature flow resistance should be suitable with the flow resistance of long tube under normal temperature bunch.Like this, equipment can normally start and work.
Enumerate following case, set forth further:
1) initial conditions is designed: environment temperature 15 DEG C, cooling fluid inlet temperature 30 DEG C, heat-sinking capability is 4.2 kW, 66%(mass ratio) glycol water, calculate (summary) through heat exchange, employing Ф 9.52 × 0.5 finned heat exchanger, long tube bunch point 3 tunnels, long 12 m in every road, 18, every road 180 ° of elbows, totally 36 m.
2) under normal temperature, liquid temperature in 27.5 DEG C, density p=1088 kg/m3, kinematic viscosity υ=4.69 × 10-6 m2/s.Through converting, its coolant rate is about 1000 kg/h, and long tube Cu Mei road velocity in pipes is 1.5 m/s, and mean resistance is about 1.3 bar.
3) under low temperature, liquid temperature in-35 DEG C, density p=1109 kg/m3, kinematic viscosity υ=96.52 × 10-6 m2/s.When a short tube bunch low temperature flow resistance is 1.3 bar, point 3 tunnels, then single channel pipe range about 1.9 m, flow is 90% under normal temperature; When a short tube bunch low temperature flow resistance is 1.1 bar, point 4 tunnels, then single channel pipe range about 1.9 m, flow is constant; Short tube bunch point way can be different from long tube bunch point way.
4) getting a short tube bunch point way is 3, and single channel pipe range is 1.9 m, and the overall length of short tube bunch is 15.8% of long tube bunch overall length.
Described magnetic valve, in the cold-starting phase, because cooling fluid viscosity increases, cause heat exchanger long tube manifold flow to hinder too large, now this valve is opened, by cooling liquid by-pass to heat exchanger short tube bunch, because design flow passage resistance force of waterproof is little, make cooling fluid be easy to through; After the cold-starting phase terminates, closed electromagnetic valve; Magnetic valve is low form, if not zero pressure difference type during type selecting, then should consider that it opens resistance.
Described pressure-difference valve, can regulate its pressure drop, after this value and the resistance of short tube manifold flow are added, should be greater than the resistance of long tube bunch.Regulated value is specifically how many, should with normally work (flow is normal, closed electromagnetic valve) time, the liquid temp that goes out of the long tube of heat exchanger bunch and short tube bunch is quite adjustment criteria.Certainly, do not get rid of and directly adopt non-regulated formula valve for pressure difference by modes such as calculating.Need to explain further, if after pressure-difference valve and short tube manifold flow hinder addition, hinder with long tube manifold flow and be consistent, certainly will be short because of short tube bunch heat exchange, cause out liquid temp high, cause uneven.So, to go out liquid temp quite for adjustment criteria, more rationally.
Described overflow valve, when closed electromagnetic valve, if coolant temperature etc. change in work, and when causing heat exchanger flow resistance to fluctuate, can be short-circuited to unnecessary cooling fluid in loop, play overflow, release effect; If in Iarge-scale system, delivery side of pump place has been designed with overflow valve or the safety valve of identical function, can be replaced.Generally, pump has a minimum flow limit value, if metered flow is 1m
3during/h, minimum flow limit value, about 40% ~ 60%, is determined by concrete condition.So overflow valve is opened numerical value and is as the criterion to protect pump non-overloading.
Described blower fan, did not open in the cold-starting phase, and the heat transfer in heat exchanger is accelerated.
Cooling fluid in the utility model, is generally glycol water, but does not get rid of other anti-icing fluid.
The beneficial effects of the utility model:
1, the utility model effectively controls the cold-starting flow resistance of heat exchanger, ensure that system works is normal.
2, the utility model is by pressure-difference valve, can play the heat-sinking capability of heat exchanger comprehensively.
3, the utility model compact conformation, only increases by two devices in heat exchanger side, takes up space hardly.
4, the utility model brings benefit to the optimization of Iarge-scale system feed flow, as more reasonable in selecting of pump.
5, the utility model runs more energy-conservation, safer, and special cold-starting is more reliable.
6, the utility model realization is easy, cost is low.
Accompanying drawing explanation
Fig. 1 is the utility model structural principle schematic diagram.
Fig. 2 is the structural principle schematic diagram that the utility model uses on cold liquid machine.
Detailed description of the invention
See Fig. 1, a kind of cooling fluid air blast cooling regulating system, include magnetic valve 1, pressure-difference valve 2, heat exchanger 3, overflow valve 5 and provide the blower fan 4 of heat radiation for heat exchanger 3, heat exchanger 3 includes fin, be in parallel and the long tube bunches 3.1 interted mutually and short tube bunches 3.2, the entrance of long tube bunches 3.1, the entrance of magnetic valve 1, the entrance of pressure-difference valve 2, draw after the entrance of overflow valve 5 is in parallel, form cooling fluid entrance, after the outlet of magnetic valve 1 and the outlet of pressure-difference valve 2 are in parallel, be connected with the entrance of short tube bunches 3.2, the outlet of the outlet of long tube bunches 3.1 and short tube bunches 3.2 is in parallel, draw after being in parallel with the outlet of overflow valve 5 again, form cooling liquid outlet.
In heat exchanger of the present utility model, fin is uniformly at intervals between long tube bunches 3.1 and short tube bunches 3.2, and short tube bunches 3.2 is uniformly at intervals in long tube bunches 3.1; The caliber of long tube bunches 3.1 and short tube bunches 3.2 is identical, and short tube bunch 3.2 length are 10% ~ 35% of long tube bunch 3.1 length.
Its workflow: 1. cold-starting phase flow process; 2. normal duty cycle flow process; 3. overflow flow process.
1. cold-starting phase flow process: cooling fluid entrance → magnetic valve 1 → short tube bunch 3.2 → cooling liquid outlet.
2. normal duty cycle flow process: cooling fluid entrance → long tube bunch 3.1+(pressure-difference valve 2+ short tube bunches 3.2) → cooling liquid outlet.
3. overflow flow process: cooling fluid entrance → overflow valve 5 → cooling liquid outlet.
Figure 1 shows that the one of the utility model principle, when cooling fluid entrance and exit exchanges, cooling fluid flows to contrary, can realize this function equally.But when it should be noted that device has the flow direction to require, should correspondingly shift one's position.
See Fig. 2, for the principle example that the utility model uses on cold liquid machine, composition graphs 1, specifically includes magnetic valve 1, pressure-difference valve 2, heat exchanger 3, blower fan 4, overflow valve 5, heater 6, water tank 7, pump 8, electric T-shaped valve 9, control valve 10, plate type heat exchanger 11 and check valve 12 etc.Its workflow is carried out according to two kinds of refrigeration modes, i.e. compressor cooling pattern and cooling fluid air blast cooling pattern.
Under compressor cooling pattern: cooling fluid, by pump 8 → electric T-shaped valve 9 → control valve 10 → plate type heat exchanger 11 → (heat load) → water tank 7 → return pump 8, circulates according to this.
Under cooling fluid air blast cooling pattern: groundwork flow process is roughly the same with shown in Fig. 1, and difference is: overflow valve 5 is changed to pump 8 and export between water tank 7 entrance, make Iarge-scale system work safer; Install check valve 12 additional in heat exchanger 3 outlet, object reduces influencing each other when two-mode switches.
In the cold-starting phase, institute's calorific requirement can from two parts, i.e. heat load and be installed at the heat that the heater 6 in water tank produces and provide, and concrete heat etc. of throwing is determined according to actual conditions.
Long tube bunches 3.1 and short tube bunch 3.2 main being set up in runner length and concrete cloth are distinguished to some extent, and long tube bunches 3.1 and short tube bunch 3.2 two parts in parallel generally, short tube bunch 3.2 intervals are evenly distributed in long tube bunches 3.1, but internal duct is separate.
The concrete index such as point way, caliber, single channel pipe range of long tube bunches 3.1 is major design foundation to meet total heat dissipation capacity and bulk etc.; The caliber of short tube bunches 3.2 is then bunch identical with long tube, and point index such as way and pipe range of short tube bunches 3.2 is to meet under low temperature flow resistance and preheating for design considerations, if the reserved liquid supply pressure surplus of system, then short tube bunch 3.2 low temperature flow resistances should be suitable with the flow resistance of long tube under normal temperature bunches 3.1; General short tube bunch 3.2 length are 10% ~ 35% of long tube bunch 3.1 length.
Magnetic valve 1 was opened in the cold-starting phase, once after the cold-starting phase terminates, magnetic valve just cuts out; Magnetic valve 1 is low form, if not zero pressure difference type during type selecting, then should consider that it opens resistance.
The regulated value of pressure-difference valve 2, should normally working time (flow be normal, closed electromagnetic valve), and the liquid temp that goes out of the long tube of heat exchanger 3 bunches 3.1 and short tube bunches 3.2 is quite adjustment criteria.
Blower fan 4 should not opened in the cold-starting phase, and whether duty cycle is opened, and opening the heat exchange of much foundations needs to determine.
The unlatching value of overflow valve 5 is as the criterion to protect pump 8 non-overloading.
Claims (3)
1. a cooling fluid air blast cooling regulating system, it is characterized in that: include magnetic valve, pressure-difference valve, heat exchanger, overflow valve and provide the blower fan of heat radiation for described heat exchanger, described heat exchanger includes fin, be in parallel and the long tube bunch interted mutually and short tube bunch, the entrance of described long tube bunch, the entrance of magnetic valve, the entrance of pressure-difference valve, draw after the entrance of overflow valve is in parallel, form cooling fluid entrance, after the outlet of described magnetic valve and the outlet of pressure-difference valve are in parallel, be connected with the entrance of described short tube bunch, the outlet of the outlet of described long tube bunch and short tube bunch is in parallel, draw after being in parallel with the outlet of described overflow valve again, form cooling liquid outlet.
2. cooling fluid air blast cooling regulating system according to claim 1, is characterized in that: in described heat exchanger, and described fin is uniformly at intervals between described long tube bunch and short tube bunch, and described short tube is bunch uniformly at intervals in described long tube bunch.
3. cooling fluid air blast cooling regulating system according to claim 1, is characterized in that: in described heat exchanger, and the caliber of described long tube bunch and short tube bunch is identical, and described short tube bunch length is 10% ~ 35% of long tube bunch length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520025338.2U CN204555398U (en) | 2015-01-14 | 2015-01-14 | Cooling fluid air blast cooling regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520025338.2U CN204555398U (en) | 2015-01-14 | 2015-01-14 | Cooling fluid air blast cooling regulating system |
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| Publication Number | Publication Date |
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| CN204555398U true CN204555398U (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520025338.2U Expired - Fee Related CN204555398U (en) | 2015-01-14 | 2015-01-14 | Cooling fluid air blast cooling regulating system |
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| CN (1) | CN204555398U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501440A (en) * | 2015-01-14 | 2015-04-08 | 合肥天鹅制冷科技有限公司 | Cooling liquid forced air cooling regulation system |
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2015
- 2015-01-14 CN CN201520025338.2U patent/CN204555398U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501440A (en) * | 2015-01-14 | 2015-04-08 | 合肥天鹅制冷科技有限公司 | Cooling liquid forced air cooling regulation system |
| CN104501440B (en) * | 2015-01-14 | 2017-01-18 | 合肥天鹅制冷科技有限公司 | Cooling liquid forced air cooling regulation 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: 20150812 Termination date: 20170114 |