CN102510982A - Local cooling system - Google Patents
Local cooling system Download PDFInfo
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- CN102510982A CN102510982A CN2010800391255A CN201080039125A CN102510982A CN 102510982 A CN102510982 A CN 102510982A CN 2010800391255 A CN2010800391255 A CN 2010800391255A CN 201080039125 A CN201080039125 A CN 201080039125A CN 102510982 A CN102510982 A CN 102510982A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
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Abstract
This local cooling system has a configuration in which the coolant (warm water, etc.) from a condenser (12) that uses a coolant delivered from a cold source (20) via a delivery pipe (27) to cool the evaporated refrigerant returned from an evaporator (6) for cooling incoming warm air is returned to a cold source (20) via a return pipe (28). If it is determined that condensation may occur, a control device (17) controls the valve opening degree of the three-way valve (24) so that part of the coolant (warm water, etc.) flows directly into the delivery pipe (27) so as to raise the temperature of the coolant flowing into the condenser (12), and as a result, the temperature of the refrigerant flowing toward the evaporator (6) is increased and condensation is avoided.
Description
Technical field
The present invention relates to local cooling system, the dewfall that prevents that particularly relates in this part cooling unit is controlled.
Background technology
The air-conditioning system about being used for such higher space of heat generation density, the computer equipment chamber (machine room etc.) of taking in a plurality of computer equipments is cooled off for example, for example known have in disclosed air-conditioning systems such as patent documentations 1.In this patent documentation 1, motion has the air-conditioning system of problem of the generation high temperature of the part that can solve each frame that high heating, big air quantity cause.
In addition, disclose at patent documentation 1 and prevent the dewfall control method.
Also known have a local air conditioning system, that is, a plurality of partial air conditioning devices of (each computer equipment is taken in the top of frame etc.) configuration in each indoor position, each partial air conditioning device is respectively to cooling off in the narrower space.
Patent documentation 1 TOHKEMY 2006-162248 communique
Summary of the invention
Existing dewfall in above-mentioned patent documentation 1 prevents in the control method that through the temperature difference based on dew-point temperature and refrigerant temperature, the output quantity of adjustment cold-producing medium force feed device and Cooling and Heat Source is avoided dewfall.But; In such method; When reducing the refrigerated medium pump revolution of cold-producing medium force feed device, owing to might producing pump, motor starting torque deficiency stops, and same; When reducing the cold-producing medium output of Cooling and Heat Source (when reducing the revolution of compressor), because compressor start moment of torsion deficiency might produce refrigeration machine and stop.
In addition; The partial air conditioning device that in the computer equipment chamber of above-mentioned that kind, is used for local cooling; Particularly be set at the frame of taking in computer equipment etc. above situation under, when producing dewfall, this water droplet falls downwards; Wetting computer equipment, the major accident that possibly cause making computer equipment to break down etc.Therefore, not hope to produce the state of affairs that said pump stops grade, can prevent to produce the dewfall of avoiding dewfall, that reliability is higher reliably and control.
Problem of the present invention provides and can not produce that refrigerated medium pump stops or refrigeration machine stops etc., can carry out the higher local cooling system of avoiding dewfall cooling running of reliability.
Local cooling system of the present invention comprises: to the local cooling unit that flows into that heating installation cools off and see off to regional area; Supply with the Cooling and Heat Source unit of first cold-producing medium to said local cooling unit; With cooling circuit from second cold-producing medium to said Cooling and Heat Source unit that supply with; Wherein said Cooling and Heat Source unit has condenser and refrigerant supplying device; Said condenser utilizes said second cold-producing medium that said first cold-producing medium that returns from said local cooling unit is cooled off, and said refrigerant supplying device will be seen off to said local cooling unit by said first cold-producing medium of said condenser cooling, and said cooling circuit has Cooling and Heat Source; Said Cooling and Heat Source is seen said second cold-producing medium via seeing pipe off off to said condenser; And said second cold-producing medium being refluxed from said condenser via recurrent canal, said local cooling unit has evaporimeter, said first cold-producing medium that this evaporimeter utilization is sent here by said refrigerant supplying device; Cool off said inflow heating installation; In air-conditioning system, comprising: the dew point temperature measurements unit is used to measure the dew-point temperature of said inflow heating installation; The refrigerant temperature measuring unit is used to measure the temperature of said first cold-producing medium that flows into said evaporimeter; Dewfall produces identifying unit, and it judges whether have the possibility that produces dewfall according to the temperature difference of said dew-point temperature and said first refrigerant temperature; Valve gear is not seen the part of said second cold-producing medium that returns from said condenser off to the said pipe of seeing off via said cold and hot seedbed; With the valve gear control module; Be judged to be to produce dewfall the time when produce identifying unit by said dewfall; Control said valve gear; The part of said second cold-producing medium that returns from said condenser is not seen off to the said pipe of seeing off via said cold and hot seedbed, thus, said second refrigerant temperature that flows into said condenser is risen.
The temperature of second cold-producing medium that returns from condenser is certainly than the temperature height of second cold-producing medium that flows into condenser.Therefore, in the time might producing dewfall,, see the part of second cold-producing medium that returns from condenser off and make itself and second refrigerant mixed, can improve the temperature of second cold-producing medium that flows into condenser from Cooling and Heat Source to seeing pipe off through the control triple valve.When the temperature of second cold-producing medium rose, the temperature of first cold-producing medium of supplying with to local cooling unit also rose, if the temperature of second cold-producing medium is risen gradually, up to the judgement of carrying out producing dewfall, just can avoid producing dewfall.
Description of drawings
Fig. 1 is the integrally-built sectional view that comprises the local cooling system of this example.
Fig. 2 is the detailed pie graph of the local cooling system of this example.
Fig. 3 is the flow chart of avoiding dewfall running control of this example.
Fig. 4 is the flow chart that the dew-point temperature calculation is handled.
(a) of Fig. 5 is the figure of the main points of cooling circuit shown in Figure 2, (b)～(d) is the figure of the other formation example of expression.
The specific embodiment
Below, with reference to accompanying drawing, embodiment of the present invention is described.
Fig. 1 representes to comprise the integrally-built sectional view of the local cooling system of this example.
In Fig. 1, for example in the higher interior space arbitrarily 25 of the heat generation density of that kind such as the computer equipment chamber of taking in a plurality of computer equipments, be provided with the multiple row machine and take in frame 1.Take in frame 1 at each machine and to have taken in electronic installation etc.At this, represent that 2 row machines take in frame 1a, 1b, but be not limited to this example.
, each machine is provided with cooling unit 2 (local cooling device above taking in frame 1; The partial air conditioning device).At this, only represent 2 cooling units 2, but cooling unit 2 is set at each position (particularly each machine is taken in the top with frame 1) in the above-mentioned interior space 25.
The basic structure of cooling unit 2 itself can not specify at this with existing roughly the same especially, but for having the structure of evaporimeter 6, air-supply arrangement 9 etc.The cold-producing medium of for example seeing off from each cooling unit 2 public Cooling and Heat Source unit 18 is via pipe arrangement inflow evaporator 6.The heating installation that flows into cooling unit 2 is by these evaporimeter 6 coolings, and this cooling air (cold air) is sent to the cooling object regional area (for example machine is taken in the space between frame 1a and the 1b) of regulation by air-supply arrangement 9.
In addition, as stated,, also can have and each cooling unit 2 each self-corresponding Cooling and Heat Source unit 18 though can be not limited to this example for the structure of a Cooling and Heat Source unit 18 to many cooling units 2 the supply system cryogens.That is, Cooling and Heat Source unit 18 is only to the structure of cooling unit 2 the supply system cryogens.
Fig. 2 representes the detailed structure view of the local cooling system of this example.These mainly represent the detailed structure of above-mentioned cooling unit 2 and Cooling and Heat Source unit 18, but these detailed structure also can be basically with existing roughly the same.
At this, though Fig. 1 do not represent, at local cooling system, have cooling circuit shown in Figure 2 11 as the structure that is used for Cooling and Heat Source unit 18 the supply system cryogens.Be used for just existing before the structure of Cooling and Heat Source unit 18 the supply system cryogens (for example cooling fluid or cold water etc.) itself; But with the characteristic that has different native systems now; Mainly being to be provided with the cooling circuit 11 (particularly being provided with triple valve 24) of structure shown in Figure 2 and the control of this triple valve 24 handles; Thus; Do not adjust the output quantity (can not take place therefore that refrigerated medium pump stops or refrigeration machine stop etc.) of refrigerant supplying device 16 (for example, refrigerated medium pump) and Cooling and Heat Source 20, avoid the dewfall in the illustrated cooling circuit 7 (particularly evaporimeter 6) to produce.
In addition; For fear of with the refrigerant mixed that is fed into evaporimeter 6, in this explanation, be that the structure of cooling fluid (cold water etc.) describes with the cold-producing medium in the above-mentioned cooling circuit 11 (cold-producing medium of supplying with to condenser 12 from Cooling and Heat Source 20); But this is an example, is not limited to this example.In addition, the cold-producing medium of supplying with to evaporimeter 6 also can be cooling fluid (cold water etc.).
Like this; Triple valve 24 is set and can avoids producing dewfall through controlling; So can not take place that pump that the Yin Mada starting torque deficiency of existing mode causes stops or the refrigeration machine that causing because of compressor start moment of torsion deficiency stops, can carrying out the high cooling running of avoiding dewfall of reliability.In addition,, use triple valve 24, but also can for example can make up a plurality of structures for making flow branch (perhaps mixing) and can controlling the mechanism of flow for the bifurcated pipe that will have switch and control valve as example at this.Such structure is referred to as valve gear.And, in this explanation, be that example describes with triple valve 24 as an example of valve gear.
Below, detailed structure, the action of above-mentioned cooling unit 2, Cooling and Heat Source unit 18, cooling circuit 11 described, but to existing roughly the same structure, action explanation simply.In addition, in illustrated various arrows (thick line, solid line, dotted line), the arrow of thick line is represented flowing of air, and the arrow expression signal line of dotted line, the arrow of solid line are represented the flow direction (and pipe arrangement of the flow direction such as cold-producing medium) of cold-producing medium and cooling fluid.
Below, the detailed structure of cooling unit 2, action are described.
At first; When to existing roughly the same when describing simple in structurely; Cooling unit 2 is through via suction inlet 3 and air cleaner 4, and inspiration is taken in the heating installation of discharging with the rear side of frame 1 from the machine of heater with above-mentioned electronic installation etc., and cooling circuit 7 that will be through being made up of evaporimeter 6 and expansion valve 5 etc. the part of chain-dotted line encirclement (on the figure by) carry out cooled cold air to this heating installation; See off to frame 1 face side via air-supply arrangement 9 and blow-off outlet 8;, thus, heater is cooled off.In addition, as general situation, the cold-producing medium that transports from above-mentioned Cooling and Heat Source unit 18 is via expansion valve 5 inflow evaporators 6; This cold-producing medium is evaporated, from absorbing evaporation latent heat on every side, thus in evaporimeter 6; To around cool off, vaporized refrigerant is back to Cooling and Heat Source unit 18.On figure, the structure of the flap of the right side of expansion valve 5 shown in laterally is a magnetic valve, and cold-producing medium is via this magnetic valve inflow evaporator 6, but in this no special relationship.
At this, cooling unit 2 also has control device 10 and calculation communicator 23.Control device 10 for example is miniature many with computer etc.; Through carrying out the application program of the regulation of storage in advance; Carry out the general various controls deposited (for example the control of the air output of the valve opening of expansion valve 5 and air-supply arrangement 9 etc.), the part of avoiding the processing that dew point relates to of this method of stating after also can also carrying out.
In addition, calculation communicator 23 has the function portion that communicates by letter that carries out with outside basically, in embodiment illustrated, communicates via control device 17 and order wire (being illustrated by the broken lines).In addition; Calculation communicator 23 for example also can have not shown MPU etc.; The part of avoiding the processing that dew point relates to of this method of stating after the execution; But control device 10 also can carry out this processing, and in this case, calculation communicator 23 (processing does not perform calculations) can only be communicator.The literary composition narration in the back in detail.
In addition; The hygrometer (representing by " MC " on the figure) of thermometer of the temperature everywhere in cooling unit 2 also has determination unit 2 (representing by " TC " on the figure) and mensuration humidity; Each thermometer/hygrometer is connected with above-mentioned control device 10 through order wire (being illustrated by the broken lines), and control device 10 is collected temperature data/humidity data of being measured by each thermometer/hygrometer at any time.
At this, in above-mentioned each thermometer/hygrometer, particularly the part relevant with this control paid and added reference symbol, only a part that is added with reference symbol is paid in explanation, other part does not describe.That is, at first, (at the upper reaches of evaporimeter 6) are provided with thermometer 21 and hygrometer 22 on the suction of the heating installation between air cleaner 4 and the evaporimeter 6 path.These are the parts that are used to try to achieve the dew-point temperature that sucks heating installation.Therefore, dew-point hygrometer also can be set and replace thermometer 21 and hygrometer 22.
In the present example, control device 10 is calculated (suction heating installation) dew-point temperature that the position is set of these thermometers 21, hygrometer 22 based on temperature data and the humidity data measured through thermometer 21 and hygrometer 22.The formula of calculating of dew-point temperature is known formula, so do not specify at this.In addition, when using the dew-point temperature timing, control device 10 is only obtained the dew-point temperature data of being measured by dew-point hygrometer separately.
In addition, illustrated thermometer 26 for example is the thermometer that is used to measure the temperature of (evaporator inlet) cold-producing medium before the inflow evaporator 6.But being not limited to this example, for example also can be the thermometer (in this explanation, in this case, will measure temperature and regard refrigerant temperature as) of measuring the surface temperature etc. of evaporimeter 6.
Carry out the control processing of above-mentioned triple valve 24 based on above-mentioned dew-point temperature and refrigerant temperature.These describe with reference to flow chart in the back.
Below, illustrated control device 17, Cooling and Heat Source unit 18, cooling circuit 11 etc. are described.
Though control device 17 is in not expression of Fig. 1, it is the whole device of local cooling system of this example of control, control cooling unit 2, Cooling and Heat Source unit 18, cooling circuit 11 etc.Control device 17 has microcomputer etc., carries out the application program of the regulation of storing in advance through CPU and carries out various controls.In addition, about the existing general various controls of carrying out, do not specify at this.The control that only this method is related to describes.
In addition, control device 17 also carries out the control of basis from arbitrary indication of command device 19 sometimes.For example, the air output and the cold wind temperature of 19 pairs of control device of command device, 17 indication cooling units 2.Control device 17 according to this indication, carries out various control actions (be existing general control as stated, do not specify at this).
Control device 17 has following characteristic: except above-mentioned existing control processing capacity, also have the control processing capacity of the valve opening that is called the triple valve of stating after having 24.As narrated, also can be outside this characteristic with existing roughly the same.
In addition; Cooling and Heat Source unit 18 can be identical with the aforesaid way existing structure, and when simple declaration, it has condenser 12, accumulator 13, refrigerant supplying device 16; Also be provided with thermometer (representing with " TC " on the figure) throughout; Also be provided with the flowmeter (figure with " QC " represent) of measurement from the flow of the cold-producing medium of refrigerant supplying device 16 output, control device 17 is based on this temperature data, data on flows etc., for example controls refrigerant supplying device 16 etc.Perhaps, each cooling unit 2 is sent instruction.
Vaporized refrigerant from above-mentioned evaporimeter 6 flows into condenser 12, it is cooled off, liquefies, and make it revert to cold-producing medium.This cold-producing medium temporarily is stored in after the accumulator 13, is transported to cooling unit 2 sides, inflow evaporator 6 by refrigerant supplying device 16.
From the cooling circuit 11 (part of on figure, being surrounded by chain-dotted line; Also can not comprise Cooling and Heat Source 20 in addition) supply with cooling fluid to condenser 12.That is, be sent to condenser 12 via seeing pipe 27 off, carry out cooling, the liquefaction of above-mentioned vaporized refrigerant through this cold water from the cooling fluid of Cooling and Heat Source 20 (for example cold water etc.).Thus, through cold water vaporized refrigerant is cooled off, on the other hand, cold water is heated (being referred to as warm water).This warm water turns back to Cooling and Heat Source 20 via recurrent canal 28, by Cooling and Heat Source 20 coolings, becomes cold water thus once more, is sent to and sees pipe 27 off.
Wherein, in native system, in the way of recurrent canal 28, be provided with triple valve 24.
Below, the structure that this triple valve 24 is related to and the control of triple valve 24 are handled and are specified.
At first, the triple valve 24 of this example is to have from the inflow entrance of a direction with to the type (making the type of pipeline shunting) of the flow export of both direction.Like above-mentioned mode; Triple valve 24 is arranged in the way of recurrent canal 28; Inflow entrance is connected with the recurrent canal 28 of condenser 12 sides; To one of the flow export of both direction with the recurrent canal 28 of Cooling and Heat Source 20 sides (this as shown in the figure be designated as recurrent canal 28 ') be connected, another is connected with illustrated short circuit pipe 29.Another of short circuit pipe 29 with see pipe off and 27 be connected.That is, become via short circuit pipe 29 with seeing that pipe 27 directly is connected off the structure that can flow out warm water etc.
Certainly, be respectively arranged with valve at the flow export to above-mentioned both direction of triple valve 24, control device 17 is for adjusting each the structure of valve opening of these valves of control.
Through being provided with such triple valve 24, can the above-mentioned warm water that return from condenser 12 sides being assigned to Cooling and Heat Source 20 sides and seeing pipe 27 sides off.Allotment ratio can freely be adjusted through the control of control device 17.That is, can freely adjust with subordinate's mode: the above-mentioned warm water 100% that will return from condenser 12 sides is seen off, or 100% is seen off, or for example respectively does for oneself 50% pair 50% to seeing pipe 27 sides off to Cooling and Heat Source 20 side, perhaps is 30% pair 70% etc.
When making when the allotment ratio of Cooling and Heat Source 20 sides is 100%, identical with existing structure, the warm water that returns from condenser 12 all flows into Cooling and Heat Source 20 and is cooled, and is exported to condenser 12 via seeing pipe 27 off.On the other hand, when to the allotment ratio less than 100% of Cooling and Heat Source 20 sides (but not being 0%), the part of the warm water that returns from condenser 12 directly is delivered to via short circuit pipe 29 and is seen off pipe 27.That is, in this case, the cold water that flows into condenser 12 be from the cold water of Cooling and Heat Source 20 with from the mixed liquor of the warm water of triple valve 24, and is certain, is that 100% situation is compared with allotment ratio to Cooling and Heat Source 20 sides, and its temperature uprises.
In other words; In said structure; Through the allotment ratio in the control triple valve 24; (valve opening of each valve through controlling two flow exports) can be adjusted the temperature (temperature is risen) of the cold water that flows into condenser 12, can adjust by the temperature of the cold-producing medium of this cold water cooling (temperature is risen).
In addition, triple valve the example that the position is not limited to Fig. 2 is set, also can be provided with like the mode of for example Fig. 5 (b).In this case, triple valve 24 is to have from the inflow entrance of both direction with to the type (making the type at pipeline interflow) of the flow export of a direction.
Under the situation of the example shown in Fig. 5 (b), at first, recurrent canal 28 branch into halfway the recurrent canal 28 of Cooling and Heat Source 20 sides ' with short circuit pipe 29.And triple valve 24 is arranged at sees pipe 27 off midway, manages 27 with seeing off of Cooling and Heat Source 20 sides for one of two inflow entrances and is connected, and another is connected with short circuit pipe 29.In addition, flow export is connected with the pipe 27 of seeing off of condenser 12 sides.That is, in triple valve 24, become and to make from the warm water of short circuit pipe 29 with from the cold water interflow of Cooling and Heat Source 20 and the structure that this mixed liquor is gone out to condenser 12 effluents.
Above-mentioned two inflow entrances at the triple valve 24 of the example shown in Fig. 5 (b) are respectively arranged with valve, and control device 17 is for adjusting each the structure of valve opening of these valves of control.This control method and effect and above-mentioned configuration example shown in Figure 2 are roughly the same, for example when wanting to make the temperature rising of mixed liquor, also can increase the valve opening of the valve of short circuit pipe 29 sides.In addition, when closing the valve of short circuit pipe 29 sides fully, the warm water that returns from condenser 12 sides all flows into Cooling and Heat Source 20, and the cold water of seeing off from Cooling and Heat Source 20 only flows into condenser 12.
In addition, the structure example of Fig. 5 (a) expression cooling circuit 11 shown in Figure 2 wants point diagram.
Fig. 5 (c), Fig. 5 (d) expression triple valve itself that the position is set is identical with Fig. 5 (a) or Fig. 5 (b), but its control method difference examples below describe.
The control method of the triple valve 24 of Fig. 1 (Fig. 5 (a)) or Fig. 5 (b), a part that makes the cooling fluid of returning from condenser 12 (warm water) be via Cooling and Heat Source 20, and be back to condenser 12.With respect to this, the control method of the triple valve 24 of Fig. 5 (c) and Fig. 5 (d) is that the part of the cooling fluid that will not see off from Cooling and Heat Source 20 is delivered to condenser 12, and makes it be back to Cooling and Heat Source 20.That is,, also can change the influx (minimizing) of cooling fluid to condenser 12 even do not change the output (revolution of compressor) (not reducing) of Cooling and Heat Source 20.
At first, the example to Fig. 5 (c) describes.
In this example, triple valve 24 that the position is set is identical with the example of Fig. 5 (a), but its structure is identical with the example of Fig. 5 (b).That is, the triple valve 24 of this example the position is set midway at recurrent canal 28, its structure is to have from the inflow entrance of both direction with to the type (making the type at pipeline interflow) of the flow export of a direction.
And a recurrent canal 28 with condenser 12 sides of two inflow entrances is connected, and another is connected with short circuit pipe 29.In addition, the flow direction of the liquid in the short circuit pipe 29 and Fig. 5 (a) and Fig. 5 (b) are opposite, thus as shown in the figure be designated as short circuit pipe 29 '.This with after Fig. 5 (d) of stating also identical.In addition, the recurrent canal 28 of flow export and Cooling and Heat Source 20 sides ' be connected.In addition, in this example, see off the pipe 27 branch into halfway condenser 12 sides see off the pipe 27 with short circuit pipe 29 '.
In said structure, in triple valve 24, be provided with valve with the inflow entrance of short circuit pipe 29 ' be connected at least, control device 17 is the structure of the valve opening that can adjust this valve of control.Under with the complete closing state of this valve, the cooling fluid of seeing off from Cooling and Heat Source 20 100% flows into condenser 12.
On the other hand, under the state that this valve is opened, corresponding to its valve opening, the part of the cooling fluid of seeing off from Cooling and Heat Source 20 is via triple valve 24 and recurrent canal 28 ' be back to Cooling and Heat Source 20.In other words, from the cooling fluid that Cooling and Heat Source 20 is seen off, not 100% inflow condenser 12, its part flows into condenser 12.That is,, also can reduce the influx of cooling fluid to condenser 12 even do not reduce the output (revolution of compressor) of Cooling and Heat Source 20.Thus, shown in the example of Fig. 5 (a) and (b), can obtain the identical effect of situation that rises with the temperature that makes the cooling fluid that flows to condenser 12.That is, the cooling performance in the condenser 12 is reduced, the temperature of the cold-producing medium that flows to evaporimeter 6 is risen.
Then, the example to Fig. 5 (d) describes.
In this example, triple valve 24 that the position is set is identical with the example of Fig. 5 (b), but its structure is identical with the example of Fig. 5 (a).That is, the position that is provided with of the triple valve 24 of this example is being seen pipe off 27 midway, and its structure is to have to the flow export of both direction with from the type (making the type of pipeline shunting) of the inflow entrance of a direction.
In the present example, triple valve 24 is arranged at sees pipe off 27 midway, manages 27 with seeing off of condenser 12 sides for one of two flow exports and is connected, another and short circuit pipe 29 ' be connected.Short circuit pipe 29 ' the opposing party be connected with recurrent canal 28.In addition, the inflow entrance of triple valve 24 is connected with the pipe 27 of seeing off of Cooling and Heat Source 20 sides.
In said structure, in triple valve 24, be provided with valve with the inflow entrance of short circuit pipe 29 ' be connected at least, control device 17 is the structure of the valve opening that can adjust this valve of control.Under the state of closing this valve fully, the cooling fluid of seeing off from Cooling and Heat Source 20 100% flows into condenser 12.
On the other hand, under the state that this valve is opened, corresponding to its valve opening, the part of the cooling fluid of seeing off from Cooling and Heat Source 20 via triple valve 24, short circuit pipe 29 ', recurrent canal 28 ', be back to Cooling and Heat Source 20.In other words, from the cooling fluid that Cooling and Heat Source 20 is seen off, not 100% inflow condenser 12, its part flows into condenser 12.That is,, also can reduce the influx of cooling fluid to condenser 12 even do not reduce the output (revolution of compressor) of Cooling and Heat Source 20.Thus, can obtain the identical effect of situation with above-mentioned Fig. 5 (c).
As described above; Through making cooling circuit 11 be the structure shown in Fig. 5 (c) and Fig. 5 (d); Can reduce the adjustment of the flow of the cooling fluid that flows into condenser 12, not carry out the control of the output (revolution of compressor) of Cooling and Heat Source 20 and just can carry out the adjustment of the cooling capacity of condenser 12.
Below, explain that with reference to Fig. 3 the control of the allotment ratio in this triple valve 24 is handled.
Fig. 3 is the flow chart of avoiding dewfall running control of this example.
As shown in Figure 3, at first, as stated, control device 10 is (with the specific time interval) measurement data of collecting various sensors etc. at any time.At this, the data relevant with this method are described, so control device 10 is collected: the temperature data of the suction heating installation of measuring by thermometer 21, hygrometer 22; Humidity data; Temperature data (step S11) with the cold-producing medium of the evaporimeter of measuring by thermometer 26 6 inlets.
Then, control device 10 is perhaps transmitted the calculation communicator 23 that above-mentioned collection data are arranged from control device 10, is perhaps transmitted the control device 17 that above-mentioned collection data are arranged via calculation communicator 23, carries out the processing of following explanation.In addition, in following explanation, carry out the example of handling for control device 17 and describe.Therefore; In this case; Control device 10 only carries out single collection temperature data etc. and with its processing of delivering letters to control device 17 via calculation communicator 23 (in addition, calculation communicator 23 becomes simple communicator), but is not limited to this example certainly.Wherein, even in other example, after the adjustment control itself of triple valve 24 of the step S14, the S15 that state carry out by control device 17.
Promptly; For example; After the processing of the step S12 that states also can or calculate communicator 23 and carry out by control device 10, in this case the dew-point temperature of calculating is sent the later processing of control device 17 execution in step S13 with the refrigerant temperature of collecting to control device 17.Certainly, in this case, in the processing execution of step S14, S15, control device 10 perhaps calculates communicator 23, at any time up-to-date dew-point temperature and refrigerant temperature data is delivered letters to control device 17.Perhaps, the for example step S12 that states after communicator 23 also can be carried out of control device 10 or calculate and the processing of S13.
But in following explanation, as stated, control device 10, calculation communicator 23 describe to the unit that control device 17 is delivered letters as collecting data separately.
In this example, control device 17 is obtained above-mentioned collection data (temperature data of the cold-producing medium of the temperature data of suction heating installation, humidity data and evaporimeter 6 inlets) at any time.
Then; Temperature data, humidity data based on the above-mentioned suction heating installation of being obtained; Calculate the dew-point temperature (step S12) that sucks heating installation, and, judge whether might produce dewfall (whether the possibility that produces dewfall is high) (step S13) based on this dew-point temperature and above-mentioned refrigerant temperature.
The processing of step S13 is to take a decision as to whether " refrigerant temperature-dew-point temperature≤Δ T1 (Δ T1: the temperature difference of predefined regulation) ".That is, below predefined setting, when when setting is following (step S13, YES), judgement might produce dewfall to the temperature difference of judging refrigerant temperature and dew-point temperature.In the time can not producing dewfall (step S13, NO), this processing finishes.
In addition, the decision method of step S13 itself can be prior art, does not specify especially, and designer etc. can suitably determine Δ T1, but followingly simply describes.
Usually, dew-point temperature is the temperature lower than refrigerant temperature, can make the said temperature difference become big through refrigerant temperature is risen.In addition, as well-known, terrifically, when refrigerant temperature-dew-point temperature=0 (no temperature difference), almost confirm to produce dewfall.When the temperature difference of refrigerant temperature and dew-point temperature diminished, the possibility that produces dewfall uprised.Above-mentioned Δ T1 for example is set at as an example: though be considered to not produce dewfall, when continuing temperature difference is diminished, just can produce the value (people judge setting based on the general general knowledge of this technical field) of dewfall.
When being judged to be (step S13, YES) to produce dewfall the time, carry out the valve opening adjustment control (step S14) of triple valve 24.For example when usual, the valve of short circuit pipe 29 sides in the triple valve 24 cuts out (100% distribute to Cooling and Heat Source 20 sides), when step S13 be judged to be YES the time, the valve of short circuit pipe 29 sides in the triple valve 24 is opened ormal weight (at this, for example making valve opening is+10%).In addition, at this moment, the valve opening of the valve of Cooling and Heat Source 20 sides in the triple valve 24 also can be carried out interlock control (at this, for example making valve opening is-10%).
Then, collect data, judge whether to produce dewfall (step S15) once more based on the next one.The processing of this step S15 is identical with the processing of above-mentioned steps S12, S13, based on collecting data, at first calculates dew-point temperature, based on this dew-point temperature and refrigerant temperature, judges whether might produce dewfall.
Then, to step S15 be judged to be NO till, that is, and to be judged to be can not produce dewfall till, repeat the processing of above-mentioned steps S14.In above-mentioned example, the valve opening that makes short circuit pipe 29 sides in the triple valve 24 by 10% increase (10% → 20% → 30% → ...).Promptly; From the warm water that condenser 12 returns, directly delivered to each a small amount of the increasing of the ratio (amount) of seeing pipe 27 warm water off through making, made temperature (from the cold water of Cooling and Heat Source 20 with from the temperature of the mixed liquor of the warm water of the triple valve 24) rising gradually of the cold water that flows into condenser 12 via short circuit pipe 29.Thus, also uprise gradually certainly from the temperature of the cold-producing medium of condenser 12 output, this cold-producing medium is delivered to evaporimeter 6 by refrigerant supplying device 16.
Thus, certainly, the refrigerant temperature in the above-mentioned determine type " refrigerant temperature-dew-point temperature≤Δ T1 " uprises gradually, becomes big with the temperature difference of dew-point temperature, so finally become " refrigerant temperature-dew-point temperature＞Δ T1 " (step S15 be judged to be NO).That is, can avoid producing dewfall.
In addition, the dew-point temperature calculation about step S12 has prior art as stating; But this roughly summary describe; As shown in Figure 4, at first, calculate saturated steam air pressure (step S21) based on temperature data; And then calculate steam partial pressure (step S22) based on humidity data, calculate dew-point temperature (step S23) based on these.About each concrete formula of calculating of handling of step S21, S22, S23 etc. is general formula, so do not specify at this.
In addition, after the processing through Fig. 3 makes after the temperature of the cold water that flows into condenser 12 rises, for example passes through the regular hour, the processing that cold water temperature is reduced.Do not specify about this processing; But for example carrying out the triple valve aperture adjustment opposite with the processing of step S14 (for example handles; The valve opening of short circuit pipe 29 sides in the triple valve 24 is 50% now; Make it be reduced to 40% → 30% → 20% successively ... Deng), each when minimizing valve opening (every) carries out the judgement of step S15.Then, when step S15 be judged to be YES the time, that is, be judged to be in the time of might producing dewfall, carry out the step S14 of Fig. 3 once more, the processing of S15 is carried out triple valve aperture adjustment and is handled to be judged as the mode that can not produce dewfall once more.
As described above, in the method,, can avoid dewfall through the triple valve 24 of adjustment and control said structure.
That is, in the method, when being judged to be might produce dewfall the time; Valve opening adjustment through triple valve 24 rises (flow (heat exchange flow) is reduced) temperature of cooling fluid (cold water etc.) of the supply condenser 12 of Cooling and Heat Source unit 18, thus; The temperature of the cold-producing medium that flows into cooling circuit 7 is risen; Therefore dewfall can be avoided,, just dewfall can be avoided so need not adjust the pump revolution of refrigerant supplying device 16 and the output quantity of Cooling and Heat Source 20; Can not produce the problem that pump stops to stop with refrigeration machine grade, can carry out the high dewfall cooling of avoiding of reliability and turn round.
Adopt local cooling system of the present invention, can not can produce pump and stop to stop etc. with refrigeration machine, can carry out reliability high avoid dewfall cooling running.
Claims (4)
1. a local cooling system is characterized in that, comprising:
To the local cooling unit that flows into that heating installation cools off and see off to regional area;
Supply with the Cooling and Heat Source unit of first cold-producing medium to said local cooling unit; With
Supply with the cooling circuit of second cold-producing medium to said Cooling and Heat Source unit, wherein
Said Cooling and Heat Source unit has condenser and refrigerant supplying device; Said condenser utilizes said second cold-producing medium that said first cold-producing medium that returns from said local cooling unit is cooled off; Said refrigerant supplying device will be seen off to said local cooling unit by said first cold-producing medium of said condenser cooling
Said cooling circuit has Cooling and Heat Source, and said Cooling and Heat Source is seen said second cold-producing medium via seeing pipe off off to said condenser, and via recurrent canal said second cold-producing medium is refluxed from said condenser,
Said local cooling unit has evaporimeter, and said first cold-producing medium that this evaporimeter utilization is sent here by said refrigerant supplying device cools off said inflow heating installation,
In air-conditioning system, comprising:
The dew point temperature measurements unit is used to measure the dew-point temperature of said inflow heating installation;
The refrigerant temperature measuring unit is used to measure the temperature of said first cold-producing medium that flows into said evaporimeter;
Dewfall produces identifying unit, and it judges whether have the possibility that produces dewfall according to the temperature difference of said dew-point temperature and said first refrigerant temperature;
Valve gear is not seen the part of said second cold-producing medium that returns from said condenser off to the said pipe of seeing off via said cold and hot seedbed; With
The valve gear control module; Be judged to be to produce dewfall the time when produce identifying unit by said dewfall; Control said valve gear; The part of said second cold-producing medium that returns from said condenser is not seen off to the said pipe of seeing off via said cold and hot seedbed, thus, said second refrigerant temperature that flows into said condenser is risen.
2. local cooling system as claimed in claim 1 is characterized in that:
Said valve gear control module; Before making the judgement of impossible generation dewfall by said dewfall generation identifying unit; The valve opening of said valve gear is increased with the ratio of stipulating gradually, thus, increase and manage the flow of seeing said second cold-producing medium off to said seeing off via said cold and hot seedbed.
3. a local cooling system is characterized in that, comprising:
Cool off flowing into heating installation, and the local cooling unit of seeing off to regional area;
Supply with the Cooling and Heat Source unit of first cold-producing medium to said local cooling unit; With
Supply with the cooling circuit of second cold-producing medium to said Cooling and Heat Source unit, wherein,
Said Cooling and Heat Source unit has condenser and refrigerant supplying device; Said condenser utilizes said second cold-producing medium that said first cold-producing medium that returns from said local cooling unit is cooled off; Said refrigerant supplying device will be seen off to said local cooling unit by said first cold-producing medium of said condenser cooling
Said cooling circuit has Cooling and Heat Source, and said Cooling and Heat Source is seen said second cold-producing medium via seeing pipe off off to said condenser, and via recurrent canal said second cold-producing medium is refluxed from said condenser,
Said local cooling unit has evaporimeter, and said first cold-producing medium that this evaporimeter utilization is sent here by said refrigerant supplying device cools off said inflow heating installation,
In air-conditioning system, comprising:
The dew point temperature measurements unit is used to measure the dew-point temperature of said inflow heating installation;
The refrigerant temperature measuring unit is used to measure the temperature of said first cold-producing medium that flows into said evaporimeter;
Dewfall produces identifying unit, and it judges whether have the possibility that produces dewfall according to the temperature difference of said dew-point temperature and said first refrigerant temperature;
Valve gear does not reflux the part of said second cold-producing medium of seeing off from said Cooling and Heat Source to said Cooling and Heat Source via said condenser ground; With
The valve gear control module; Be judged to be to produce dewfall the time when produce identifying unit by said dewfall; Control said valve gear; The part of said second cold-producing medium of seeing off from said Cooling and Heat Source is not refluxed to said recurrent canal via said condenser ground, thus, the flow of said second cold-producing medium that flows into said condenser is reduced.
4. local cooling system as claimed in claim 3 is characterized in that:
Said valve gear control module; Before making the judgement of impossible generation dewfall by said dewfall generation identifying unit; The valve opening that makes said valve gear increases with the ratio of regulation gradually, thus, increases not via said condenser ground to the reflux flow of said second cold-producing medium of said recurrent canal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2010/063677 WO2012020493A1 (en) | 2010-08-12 | 2010-08-12 | Local cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102510982A true CN102510982A (en) | 2012-06-20 |
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ID=45567471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800391255A Pending CN102510982A (en) | 2010-08-12 | 2010-08-12 | Local cooling system |
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| Country | Link |
|---|---|
| CN (1) | CN102510982A (en) |
| WO (1) | WO2012020493A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000171079A (en) * | 1998-12-07 | 2000-06-23 | Aisin Seiki Co Ltd | Radiation-convection-type heating and cooling device |
| JP3583536B2 (en) * | 1995-12-14 | 2004-11-04 | 高砂熱学工業株式会社 | Air conditioner, air conditioning system and control method thereof |
| JP2009036506A (en) * | 2007-07-09 | 2009-02-19 | Ntt Facilities Inc | Air-conditioning system and its operating method |
| CN101545660A (en) * | 2009-05-15 | 2009-09-30 | 何森 | Indoor temperature and humidity independent control system |
| CN201488163U (en) * | 2009-08-21 | 2010-05-26 | 张军 | Dew point control device used in floor refrigeration system |
-
2010
- 2010-08-12 CN CN2010800391255A patent/CN102510982A/en active Pending
- 2010-08-12 WO PCT/JP2010/063677 patent/WO2012020493A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3583536B2 (en) * | 1995-12-14 | 2004-11-04 | 高砂熱学工業株式会社 | Air conditioner, air conditioning system and control method thereof |
| JP2000171079A (en) * | 1998-12-07 | 2000-06-23 | Aisin Seiki Co Ltd | Radiation-convection-type heating and cooling device |
| JP2009036506A (en) * | 2007-07-09 | 2009-02-19 | Ntt Facilities Inc | Air-conditioning system and its operating method |
| CN101545660A (en) * | 2009-05-15 | 2009-09-30 | 何森 | Indoor temperature and humidity independent control system |
| CN201488163U (en) * | 2009-08-21 | 2010-05-26 | 张军 | Dew point control device used in floor refrigeration system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012020493A1 (en) | 2012-02-16 |
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Application publication date: 20120620 |