CN1412495A - Method for exhausting air in cold-hot medium water system - Google Patents
Method for exhausting air in cold-hot medium water system Download PDFInfo
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- CN1412495A CN1412495A CN 02148470 CN02148470A CN1412495A CN 1412495 A CN1412495 A CN 1412495A CN 02148470 CN02148470 CN 02148470 CN 02148470 A CN02148470 A CN 02148470A CN 1412495 A CN1412495 A CN 1412495A
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Abstract
The method for exhausting air form control air-conditioning cooling and heating medium water system is characterized by that an air-collecting tank and an exhaust valve are set in the water-collector of return of central conditioning system, the inlet of air collecting tank is connected with water collector of central air-conditioning system, and the outlet of air collecting tank is connected with exhaust valve, and the exhaust valve of top of vertical pipe in the central air-conditioning system is remained, and the flow speed of cooling and heating medium water in the central air-conditioning system is not less than 0.4 m/s.
Description
Technical field
The present invention relates to the method for the deaeration in the cold and hot matchmaker's water system of a kind of central air-conditioning.
Background technology
In the cold and hot matchmaker's water system of existing central air-conditioning, before cold and hot matchmaker's water system water-filling, air is arranged in the system, when water-filling in system, air is pressed against system's end and top gradually, opens the top vent valve and discharges air, makes water be charged to the top.But air can not all be discharged in the cold heat medium water, still has air at some position of system.In addition, contain air in the water, during heat supply, air is separated from water gradually when water temperature raises in the winter time.Air is brought in cold and hot matchmaker's water system when maintenance coil pipe air-conditioner in addition.Perhaps some valve or automatic exhaust valve imprecision in the system, when cold and hot matchmaker's water system for a certain reason (for example water filter obstruction etc.) when producing negative pressure, outside air just enters from these imprecision valves.Air enters and at first can make water pump produce pneumatic hammer in cold and hot matchmaker's water system, and secondly air long-play in cold and hot matchmaker water route has stronger corrosiveness to waterway pipe, and inner-walls of duct and water hollow gas phase are met and very easily produced iron rust, cause certain harm.Traditional decentralize that the way of air is in the air-conditioning system: after cold and hot matchmaker's water conduit tube end (peak) and localized raised, may air collector and automatic exhaust steam valve be set the pneumatosis place, hand-operated valve or automatic exhaust steam valve be set on coil pipe air-conditioner top.Use the air collector gas collection in the system, by automatic exhaust steam valve or manually vent valve exhaust.General 3～50,000 m
2Central air-conditioning system need install 200 and overlap air collector and air bleeding valve.The amount of working is big like this, operates also very loaded down with trivial detailsly, takes a lot of work and time-consuming the investment cost height.And existing air bleeding valve divides manually and automatic two kinds.The automatic exhaust steam valve management is easy to use, intrasystem gas collection can be discharged automatically, but owing to cause for quality and installation reason, not reach ideal effect sometimes.The common fault of automatic exhaust steam valve is that pore flowing water and exhaust are stopped up, and pore flowing water destroys inside plant and indoor environment, and pore stops up the destruction system.Manual exhaust valve then needs manually-operated, if exit untimely can influence the normal operation of system, though that it uses is reliable, as long as manually-operated gate is not bad just to can't go wrong, its workload is big, 3～50,000 m
2Central air-conditioning system in 200 one less important a lot of times of valve switch, very loaded down with trivial details, difficulty of construction is also big, because for exhaust needs, piping facility will have certain slope, cold and hot matchmaker's water-system pipeline installation workload is big, outdoor gas extraction system will be incubated, and the indoor exhaust valve will prevent to dabble, and prevents to destroy furniture, destroy metope and environment or the like, in construction, need do a large amount of work like this.So it is many that existing gas extraction system is spent, workload is big, and system's operation is long, and drip and take place often in the air bleeding valve place, environment is damaged.
Summary of the invention
Purpose of the present invention is exactly in order to address the above problem, and proposes a kind of simple and practically, easy to operate, and difficulty of construction and workload are little, and investment cost is few, inside plant and environment is had air elimination methods in cold and hot matchmaker's water system of good protective effect.
Technical solution of the present invention:
Air elimination methods in a kind of cold and hot matchmaker's water system is characterized in that its employing following steps:
A, air collector and air bleeding valve are set in the water collector of central air conditioner system backwater, the import of its air collector links to each other with the water collector of central air conditioner system, and the outlet of air collector is connected with air bleeding valve, and the air bleeding valve of the riser top in the central air conditioner system keeps;
The flow velocity of the cold heat medium water in b, the central air conditioner system is not less than 0.4m/s.
The present invention's viewpoint that breaks traditions, change air method for removing in the cold and hot matchmaker's water system of central air-conditioning, with traditional at cold and hot matchmaker's water system standpipe with raise the exhaust mode of establishing air collector in the corner and change into and drive air by cold and hot matchmaker's water flow velocity and run down to the minimum water collector place of machine room and discharge mode by the air collector automatic exhaust steam valve, overcoming former gas extraction system spends many, workload is big, system's operation is long, drip and take place often in the air bleeding valve place, to problems such as environment damage, the inventive method can the simplified design program and is reduced difficulty of construction, saves investment cost simultaneously.This new exhaust mode is simple and practical, easy to operate, reduces commissioning staff and operating personnel and maintenance personal's workload, has particularly protected inside plant and environment.
Description of drawings
Fig. 1 is the structural representation of the cold and hot matchmaker's water system of the present invention.
Fig. 2 is the cold heat medium water gas flow experiment schematic diagram when static.
Gas flow experiment schematic diagram when Fig. 3 is cold and hot matchmaker's hydrodynamic(al) attitude.
The specific embodiment
The air elimination methods adopts following steps in cold and hot matchmaker's water system of the present invention:
1, air collector and air bleeding valve are set in the water collector of central air conditioner system backwater, as Fig. 1, the import of its air collector links to each other with the water collector of central air conditioner system, and the outlet of air collector is connected with air bleeding valve, this air bleeding valve can be an automatic exhaust steam valve, also manual exhaust valve.The air bleeding valve of the riser top in the central air conditioner system keeps, and it uses when adding water for the first time, closes after adding.Air collector that possibility pneumatosis place is provided with after cold and hot matchmaker's water conduit tube end (peak) in the central air conditioner system and the localized raised and automatic exhaust steam valve and the hand-operated valve or the automatic exhaust steam valve that are provided with on coil pipe air-conditioner top all can be removed.
2, the flow velocity of the cold heat medium water in the central air conditioner system is not less than 0.4m/s, is preferably 0.5-0.6m/s.Like this, the present invention utilizes the flow velocity of cold heat medium water in system, and the air in the cold heat medium water is taken under the promotion of cold heat medium water in the air collector at central air conditioner system lowest part backwater water collector place, discharges air by air bleeding valve.
In order to realize purpose of the present invention, the applicant has done kinds of experiments to the Research of Dynamic Analysis of air in water.Shown in Fig. 2,3.Fig. 2 is the cold heat medium water gas flow experiment schematic diagram when static, when air in cold and hot matchmaker's water system is under the overall leadership during no pressure, transparent pipe H (as internal diameter 30mm) is uprightly filled water, be provided with bypass balance pipe G in the transparent pipe H, F opens air bleeding valve, calms the anger and enters in the transparent pipe H with suppressing balloon A, bubble in the transparent pipe H floats to the O point and picks up counting, stop timing when bubble rises to 2000mm, at this moment timing time is 14 seconds, air in pipe in the water to the fast V=s/t=2m/14s=0.143m/s that floats.When air pressurizes in cold and hot matchmaker's water system is under the overall leadership, earlier air bleeding valve F1 is closed, open pressurizing valve F2, the nitrogen pot N 0.1Mpa nitrogen that in cold and hot matchmaker's water system is under the overall leadership, pressurizes then, calm the anger and enter in the transparent pipe H with suppressing balloon A then, bubble floats to the O point and picks up counting, and stops timing when bubble rises to 2000mm, at this moment timing is 14 seconds, the floating fast V=s/t=2m/14s=0.143m/s that air makes progress during plus-pressure in transparent pipe H.
Gas flow experiment schematic diagram when Fig. 3 is cold and hot matchmaker's hydrodynamic(al) attitude, it reflects that cold and hot matchmaker's waterpipe raises the much water flow velocities of corner needs and could take away air.See Fig. 3, earlier inlet valve F3 is slowly opened greatly, simultaneously flowing water Valve F4 is opened, water slowly enters in the curved transparent pipe A ' (long 15m, internal diameter 22mm), and water extends to the A1 place, the pool flow surface reduces when water is raised to the A1 place, and in the pipe leak water in the lower end, and the upper end is a gas.When water is gone to A2 place water again along descending tube wall to run down to the A3 place, upwards prolong from the A3 full packages again to be raised to the A4 place.Move downwards along tube wall at the A4 place again.Valve F3 is slowly opened greatly, water velocity is accelerated, air is operation forward constantly, all arranged when the interior air of curved transparent pipe A ', stopped out valve F3, wait five minutes after, water flow velocity is steady, at this moment with the measuring device F5 timing of catchmenting, stop timing to measuring device F5 water when full, the time at this moment is 41 seconds/8.5 liters.Calculate water flow velocity, V=m
3/ m
2* s=0.0085/0.011 * 0.011 * 3.14 * 41=0.546m/s.
Can illustrate that from three experiments air has or not the floating speed of pressure constant in cold and hot matchmaker's water system, because water and air be in an obturator, both pressure change and equate, so that bubble floats in pipe is fast constant.
Bubble floating speed in standpipe is 0.143m/s, is lower than design specification.Regulation and stipulation vertical water pipe water flow velocity 1-3m/s.See Table 1: table 1 air-conditioner water system is recommended 349 pages in the simple and clear Air-conditioner design handbook of flow velocity
| The position | Flow velocity m/s | The position | Flow velocity m/s |
| Water pump extrudes mouth | 2.4---3.6 | General pipeline | 1.5---3 |
| The water pump suction inlet | 1.2---2.1 | The hot and cold water coil pipe | 0.8---1.5 |
| Main pipe | 1.2---4.5 | Cooling water pipe | 1.2---2.4 |
| To upper riser | 1---3 | Drainpipe | 1.2---2.1 |
Raise the air of corner on the plane, air can be brought into fully in the lowest part air collector of central air-conditioning machine room and discharge when water flow velocity 0.546m/s.And design specification stipulates that general pipe flow speed is 1.5-3m/s, hot and cold water coil pipe 0.8-1.5m/s.
Application example 1: the applicant is once to m more than 40,000 below six floors
2Cold and heat supply matchmaker water system experimentizes.All air bleeding valves in the shutdown system only keep cold heat medium water standpipe air bleeding valve and do not close (anhydrous in the system, the experiment of carrying out after the overhaul).Utilize the boiler room softened water equipment to fill demineralized water, when pressure reaches static pressure 0.24Mpa in the cold and hot water supply system after 30 minutes (static pressure: decide) according to story height to the water collector of the cold and hot matchmaker's water system of central air-conditioning.Open cold and hot matchmaker's water-circulating pump and circulate, when water and air process machine room air collector, air is discharged in the upper end enters air collector, and air is constantly discharged, and water constantly replenishes, and does not stop moisturizing when gas is discharged when air bleeding valve has.Close cold heat medium water standpipe air bleeding valve.Whole process is only with the task of just finishing water-filling exhaust in this system in 2 hours, and respond well, water moves voiceless sound in this system, the Pressure gauge ripple disable, and water-filling exhaust in the past needed to finish in 2 days 48 hours, by contrast, raised the efficiency more than 20 times.See Fig. 1.
Application example 2: to 16 layers, nearly 40,000 m
2More than 200 automatic exhaust steam valve arranged in the hot system of the cooling in building, in construction, automatic exhaust steam valve is all removed, close more than 1000 air bleeding valve in the terminal heat transmission equipment simultaneously, only keep air bleeding valve (after the first time, water-filling was used three riser top, close the air bleeding valve of three riser top, prevent to dabble), see Fig. 1.With first application example method water-filling in cold and hot matchmaker's water system, from turn on pump circulation water-filling, exhaust was only just finished with nearly 2 hours.Recirculated water is stable in the system, and water operation in pipe is noiseless, the Pressure gauge ripple disable.
The inventive method is equally applicable to skyscraper, because skyscraper adopts the cold and hot matchmaker's water circulation system of layer-stepping usually, its principle is identical.
Claims (3)
1, air elimination methods in a kind of cold and hot matchmaker's water system is characterized in that its employing following steps:
A, air collector and air bleeding valve are set in the water collector of central air conditioner system backwater, the import of its air collector links to each other with the water collector of central air conditioner system, and the outlet of air collector is connected with air bleeding valve, and the air bleeding valve of the riser top in the central air conditioner system keeps;
The flow velocity of the cold heat medium water in b, the central air conditioner system is not less than 0.4m/s.
2, by air elimination methods in the described cold and hot matchmaker's water system of claim 1, it is characterized in that air bleeding valve or automatic exhaust steam valve on the described central air conditioner system water collector, or manual exhaust valve.
3, by air elimination methods in the described cold and hot matchmaker's water system of claim 1, the flow velocity that it is characterized in that the cold heat medium water in the described central air conditioner system is 0.5-0.6m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021484708A CN1180208C (en) | 2002-12-10 | 2002-12-10 | Method for exhausting air in cold-hot medium water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021484708A CN1180208C (en) | 2002-12-10 | 2002-12-10 | Method for exhausting air in cold-hot medium water system |
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| Publication Number | Publication Date |
|---|---|
| CN1412495A true CN1412495A (en) | 2003-04-23 |
| CN1180208C CN1180208C (en) | 2004-12-15 |
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ID=4751440
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021484708A Expired - Fee Related CN1180208C (en) | 2002-12-10 | 2002-12-10 | Method for exhausting air in cold-hot medium water system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936569A (en) * | 2010-09-07 | 2011-01-05 | 孟晋奎 | Low-temperature water heating system |
| CN103193287A (en) * | 2013-04-25 | 2013-07-10 | 朱正杆 | Method and equipment for exhausting air in water circulation system |
| CN104896650A (en) * | 2014-03-05 | 2015-09-09 | 珠海格力电器股份有限公司 | Air conditioning water system exhaust control method and device and air conditioning system |
| CN107477664A (en) * | 2017-07-10 | 2017-12-15 | 珠海格力电器股份有限公司 | Water system emptying control method and device |
-
2002
- 2002-12-10 CN CNB021484708A patent/CN1180208C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936569A (en) * | 2010-09-07 | 2011-01-05 | 孟晋奎 | Low-temperature water heating system |
| CN103193287A (en) * | 2013-04-25 | 2013-07-10 | 朱正杆 | Method and equipment for exhausting air in water circulation system |
| CN103193287B (en) * | 2013-04-25 | 2015-03-18 | 朱正杆 | Method and equipment for exhausting air in water circulation system |
| CN104896650A (en) * | 2014-03-05 | 2015-09-09 | 珠海格力电器股份有限公司 | Air conditioning water system exhaust control method and device and air conditioning system |
| CN104896650B (en) * | 2014-03-05 | 2017-08-29 | 珠海格力电器股份有限公司 | Air conditioning water system exhaust control method and device and air conditioning system |
| CN107477664A (en) * | 2017-07-10 | 2017-12-15 | 珠海格力电器股份有限公司 | Water system emptying control method and device |
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| Publication number | Publication date |
|---|---|
| CN1180208C (en) | 2004-12-15 |
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Granted publication date: 20041215 Termination date: 20111210 |