CN110160281A - Pump refrigerant cooling system and built-in redundancy with l+1 to N+1 - Google Patents

Abstract

The invention discloses pump refrigerant cooling systems and built-in redundancy with l+1 to N+1.A kind of pump refrigerant cooling system has cooling unit associated with pump unit, is used to provide working fluid to cooling unit with being capable of cooling space.Pump refrigerant cooling system also includes redundancy pump component, when primary pump unit associated with cooling unit becomes failure, starts the redundancy pump component.Primary pump unit, which is deactivated, is conducive to redundancy pump component.Once primary pump unit is in the state suitable for restarting, then redundancy pump component is deactivated, and restart primary pump unit.

Description

Pump refrigerant cooling system and built-in redundancy with l+1 to N+1

The application be propose on December 27th, 2012, application No. is 2012105991938, entitled " there is l+1 to N+ The divisional application of the patent application of 1 pump refrigerant cooling system and built-in redundancy ".

Cross reference to related applications

This application claims the priority of the U.S. Provisional Application No.61/580,695 submitted on December 28th, 2011 to weigh Benefit.The entire disclosure of above-mentioned application is incorporated herein by reference.

Technical field

This disclosure relates to the pump refrigerant cooling system for accurate cooling application with primary cooling circuit redundancy.

Background technique

This part provides background technical information relevant to the disclosure, needs not be prior art.

Data center is the room comprising many electronic equipments, such as computer server.Data center and be included in its In equipment typically specifically have optimal environment operating status, especially temperature and humidity.Atmosphere control system is kept Temperature and humidity appropriate in data center.

Atmosphere control system includes cooling system, cooling air and supplies cool air to data center.Cooling system It may include air-conditioning unit, such as computer room air-treatment (CRAH) or computer room air-conditioning (CRAC) unit, it is cold The air for arriving data center is but provided.Data center can have raised floor and cold air passes through in raised floor Ventilation opening is introduced into.Raised floor can be configured to provide to go out in the cold air of CRAH (or CRAHs) or CRAC (or CRACs) Air compartment between mouthful and the ventilation opening (vent) in raised floor, or the separated air compartment for for example managing (duct) also can be used (plenum)。

Data center can also have hard floor.CRACS can be for example arranged in several rows of electronic equipment, can be with It arranges that their cold air is supplied towards respective cold passageway (aisle), or arranges CRACS along the wall of data center.In number It can be set in the hot passageway with the equipment frame set in a row/cold passageway construction according to the equipment frame (rack) at center.Allusion quotation Type the cool air inlet of a framed bent before frame face the cool air inlet of the framed bent across cold passageway, and a row The hot air outlet of frame faces the hot air outlet of the framed bent across hot passageway.

A type of cooling system uses pump refrigerant cooling unit, such as the libert from Columbus, Ohio (Liebert) cooling unit used in the XD system that company obtains.Liebert XD system has there are two cooling circuit, It is properly termed as cooling circuit or circulation.Primary circuit uses chilled water or refrigerant, such as R407C, and secondary loop uses Pump refrigerant, such as R134a.Primary circuit includes to fluid heat exchanger so as to the cooling pumping system recycled in secondary loop The fluid of cryogen.Secondary loop includes one or more Phase cooling modules, has the fluid to air heat exchanger, passes through it Circulation pump refrigerant is so as to the cooling air for flowing through heat exchanger.According to specific design, heat exchanger typically may comprise steaming Send out device coil pipe and flow regulator or expansion valve.

The foundation drawing of two cooling circuits (or circulation) of LiebertXD system is represented and is described in USSN10/ 904,889, entitled " cooling system (the Cooling System for High Density for high density heat load Heat Load) ", its entire disclosure is incorporated herein by reference.Fig. 1 and Fig. 2 of above-mentioned application include in this as Fig. 1 and Fig. 2 To be illustrated.

With reference to Fig. 1 and Fig. 2, disclosed cooling system 10 includes with second circulation 14 (secondary cooling circuit) thermal communication One cooling cycle 12 (primary cooling circuit).Disclosed cooling system 10 also includes control system 90.First and second circulations 12 It include independent working fluid with 14.Working fluid in second circulation is any to be suitable as waving for conventional refrigerant Hair property fluid, includes but not limited to chlorofluorocarbons (CFCs), hydrofluorocarbon (HFCs) or hydrochlorofluorocarsolvent (HCFCs).Use volatility Working fluid eliminate in the top of sensitive equipment using water, such as sometimes in the conventional system for Cooling calculation machine computer room Done in.Second circulation 14 include pump 20, one or more First Heat Exchangers (evaporator) 30, the second heat exchanger 40, and mutually The even pipe of the different components of second circulation 14.Second circulation 14 is not vapor compression refrigeration system.Instead of, second circulation 14 Compressor is replaced using pump 20 to recycle volatile working fluid for radiating from heat load.Pump 20 is preferably able to pump The control system sending volatile working fluid through the second cooling cycle 14, and preferably being realized by controller 90 into Row control.

First Heat Exchanger 30 is gas-liquid heat-exchange, when second working fluid passes through second fluid road in First Heat Exchanger 30 When diameter, which radiates from heat load (not shown) to the second working fluid.For example, gas-liquid heat-exchange 30 can wrap Multiple hoses (tube) for working fluid are included, multiple hoses are arranged to that hot-air is allowed to pass through therebetween.It is understood that It is that many gas-liquid heat-exchanges known in the art can be used in disclosed cooling system 10.Flow regulator 32 can connect Between pipe (piping) 22 and the entrance of evaporator 30, to adjust the flowing that working fluid enters evaporator 30.Flow tune Section device 32 can be for adjusting any kind of device flowed in cooling system 10.Flow regulator 32 preferably keeps permanent Fixed output flowing, independent of the inlet pressure on system working pressure range.In the embodiment of Fig. 1 and Fig. 2, second Circulation 14 includes multiple evaporators 30 and the flow regulator 32 for being connected to pipe 22.However, disclosed system can have one Or more more than one evaporators 30 and the flow regulator 32 for being connected to pipe 22.

Second heat exchanger 40 is liquid-liquid heat exchanger, from the second working fluid heat of transfer to first circulation 12.It is understood that Many liquid-liquid heat exchangers known in the art can be used for disclosed cooling system 10.For example, liquid-liquid heat exchanger 40 may include Multiple hoses are used to be arranged in a fluid in the chamber or shell comprising second fluid.Coaxial (" tube-in-tube ") exchanger It is suitable to be also possible to.In certain embodiments, it is preferable to use plate heat exchanger.Second circulation 14 can also include passing through bypass Pipeline 52 is connected to the receiver 50 of the outlet 46 of the second heat exchanger 40.Receiver 50 can be stored in second circulation 14 and Assemble working fluid to allow the change in terms of temperature and heat load.

In one embodiment, gas-liquid heat-exchange 30 can be used for the cooling room comprising computer equipment.For example, fan 34 Air can be extracted out from room (heat load) by heat exchanger 30, the second working fluid absorbs the heat from air there. In another embodiment, gas-liquid heat-exchange 30 can be used for by or at the equipment installation heat exchanger 30 directly from production The electronic equipment (heat load) of heat amount removes heat.For example, electronic equipment is typically embodied in (not shown) in shell.Heat exchange Device 30 can be installed on shell, and fan 34 can extract air out from shell by heat exchanger 30.Alternatively, the first exchange Device 30 can directly be thermally contacted with heat source (such as cold plate).It will be appreciated by those skilled in the art that disclosed cooling system 10 Heat exchange rate, size and other design parameters of component depend on the size of disclosed cooling system 10, the heat load being managed Magnitude and particular implementation other details.

In the embodiment of the disclosed cooling system 10 of Fig. 1 description, first circulation 12 includes being connected to second circulation 14 Liquid-liquid heat exchanger 40 chilled water circulation 60.Specifically, the second heat exchanger 40 has first and second be connected to each other Point or fluid path 42 and 44.The second path 42 for volatile working fluid connects between First Heat Exchanger 30 and pump 20 It connects.First fluid path 44 connects chilled water circulation 60.Chilled water circulation 60 can be similar to known in the art.Freeze water system System 60 includes the first working fluid for absorbing heat from the second working fluid by liquid-liquid heat exchanger 40.Then the first working fluid It is cooled by the technology known in the art for conventional chilled water circulation.In general, the first working fluid can be volatilization It is property or nonvolatile.For example, in the embodiment in figure 1, the first working fluid can be water, ethylene glycol or its mixture. Therefore, the embodiment of second circulation 14 can be configured to such as independent unit, receiving pump 20,30 and of gas-liquid heat-exchange in Fig. 1 Liquid-liquid heat exchanger 40, and can connect existing chilled water service, such as available cooled set is accommodated under construction It is standby.

Disclosed in Fig. 2 in the embodiment of cooling system 10, second circulation 14 substantially with same as described above.However First circulation 12 includes the flow path 44 for being connected to the heat exchanger 40 of second circulation 14 or the vapor compression refrigeration of first part System 70.Such as in the embodiment in figure 1, the refrigeration instead of using chilled water to remove heat from second circulation 14, in Fig. 2 System 70 is connected directly to liquid-liquid heat exchanger 40 or its " the other half ".Vapor compression refrigeration system 70 can be substantially similar In known in the art.Typical vapor compression refrigeration system 70 includes compressor 74, condenser 76 and expansion device 78.Pipe 72 These components are connected with each other to and are connected to the first flow path 44 of heat exchanger 40.

Vapor compression refrigeration system 70 by with the first working fluid from exchanger 40 absorb heat and radiate heat to Environment (not shown) and from by the second heat exchanger 40 the second working fluid remove heat.First working fluid, which can be, to be waved Hair property.For example, in the embodiment of fig. 2, the first working fluid can be any conventional chemical refrigerant, it include without limit In chlorofluorocarbons (CFCs), hydrofluorocarbon (HFCs) or hydrochlorofluorocarbons (HCFCs).Expansion device 78 can be valve, aperture or this field Other devices known to technical staff, to generate pressure drop when working fluid passes through.Compressor 74 can be known in the art Any kind of compressor, to be suitable for refrigerant service, such as reciprocating compressor, scroll compressor etc..It is retouched in Fig. 2 In the embodiment stated, cooling system 10 is a whole set of.For example, vapor compression refrigeration system 70 may belong to one of individual unit Point, also accommodate pump 20 and liquid-liquid heat exchanger 30.

During disclosed system operatio, working fluid is moved to gas-liquid heat-exchange 30 by pipe 22 by pump 20.Pump increases The pressure of working fluid, and its enthalpy keeps substantially the same.Therefore pumping work fluid can enter gas-liquid heat-exchange or second The evaporator 30 of circulation 14.Fan 34 can extract air out from heat load by heat exchanger 30.When hot-air (does not have from heat load Show) when entering gas-liquid heat-exchange 30, volatile working fluid absorbs heat.It is some when fluid heating is by heat exchanger Volatile working fluid will evaporate.In the cooling system 10 fully loaded, the fluid for leaving First Heat Exchanger 30 can be with It is essentially saturated steam.Steam flow to liquid-liquid heat exchanger 40 by pipe 36 from heat exchanger 30.In pipe or return line 36 In, working fluid is substantially vapor state, and when its enthalpy keeps substantial constant, fluid pressure drop.In liquid liquid In heat exchanger 40, pass through the first circulation that transfers heat in first fluid path 44 in the steam in second fluid path 42 12 first, colder fluid and be condensed.The working fluid of condensation leaves heat exchanger 40 by pipe 46 and enters pump 20, There second circulation 14 can repeat.

First cooling cycle 12 is operated together with second circulation 14, absorbs heat entrance will pass through from the second working fluid First working fluid and reject heat to environment (not shown) and from second circulation 14 remove heat.As described above, the One circulation 12 may include chilled water system 60 as shown in Figure 1 or vapor compression refrigeration system 70 as shown in Figure 2.In Fig. 1 Chilled water system 60 run during, for example, the first working fluid can flow the first fluid path 44 by heat exchanger 40, And it can be cooled down in cooling tower (not shown).During the operation of the refrigeration system 70 of Fig. 2, for example, the first workflow Body passes through the first part 44 of liquid-liquid heat exchanger 40, and absorbs heat from the volatile fluid in second circulation 14.Workflow Body evaporates in the process.Steam is transported to compressor 74, and working fluid is compressed there.Compressor 74 can be reciprocal, whirlpool The compressor of other types rotating or known in the art.After compression, working fluid is conveyed through discharge pipe and arrives Condenser 76, heat is dissipated into external heat sink from working fluid there, for example, outdoor environment.When leaving condenser 76, Refrigerant flowing is by liquid line to expansion device 78.When refrigerant passes through expansion device 78, the first working fluid experience Pressure drop.When leaving expansion device 78, working-fluid flow passes through the first fluid path of liquid-liquid heat exchanger 40, is used as and is used for The evaporator of refrigeration cycle 70.

Data center supplier constantly searches for improving reliability and the uptime from atmosphere control system (up time).Therefore, data center supplier constantly needs the redundancy improved in atmosphere control system, so as to pre- anti-cold But the unnecessary downtime of operation of the electronic equipment due to unexpectedly interrupting atmosphere control system.One mode of redundancy exists In each element of duplication cooling system, such as the first cooling cycle 12 and the second cooling cycle 14.This entire redundancy can It can be design, implementation and control that be expensive and being extremely complex cooling system.In different constructions, redundancy be can wrap The implementation for including cooling circuit, including such as Fig. 1 and Fig. 2 shows the second cooling cycle 14 the second reduction implementation.It reduces Redundancy may include the half of the second pump unit 20 and the heat exchanger provided in primary cooling system.Execute these redundant systems Relevant detection and control will also be needed.Correspondingly, the about cost of this system can be in basic cold load cost sum Within the scope of 50%.

For redundancy so that another method for minimizing equipment may include by utilizing refrigerating module with complexity, friendship The excessive offer environment of the configuration of fork.Therefore the failure of one cooling circuit can be intersected by other cooling circuits becomes to damage A cooling circuit region.It is this it is excessive offer the cost of raising is provided again for consumer comprising be more than Fig. 1 with Fig. 2 shows the additional pump, refrigerating module, detection, pipeline and the control system that routinely configure.

Summary of the invention

This part provides the summary of the invention of the disclosure, and its full scope or all features do not have detailed disclosure.

A kind of cooling system is used for the cooling load with the primary cooling module by refrigerant circulation to load.Such as Fruit primary cooling module is deactivated, then when primary cooling module is deactivated, redundancy refrigerating module provides refrigerant to load Flowing.Primary cooling module can be restarted to be conducive to secondary cooling module.When it happens, secondary cooling module quilt It deactivates.Redundancy refrigerating module is set to provide the fluid for flowing to any load in a cooling system.

Each refrigerating module in primary cooling and secondary cooling module further includes the pump for circularly cooling agent, the pump with First temperature provides refrigerant to load.Each module in primary and secondary module further includes for freezing from load-receipt The condenser of agent.The temperature higher than the first temperature is in by the refrigerant that condenser receives.It is every in primary and secondary module A module further includes liquid receiver, receives the refrigerant for carrying out the liquid condition of condenser.

A kind of cooling system is used to cool down load, which has the cooling mould by refrigerant circulation to load Block.Primary cooling module has a pair of of circuit, and the circuit includes controller, pump and at least one valve.Share altogether in a pair of of circuit Same condenser and receiver.If a pair of of circuit is redundantly run so that a circuit is not run, another circuit is run To control the fluid flowing by refrigerating module.

A kind of cooling system comprising primary cooling module, primary cooling module provide refrigerant to load.Cooling system System further includes the first liquid receiver of refrigerant associated with primary cooling module and for receiving liquid condition.It is examining It measures in the insufficient situation of primary cooling, secondary cooling module provides the supplement flowing of the refrigerant through overload.

A kind of cooling system, including multiple primary cooling modules.It is negative by multiple heat that primary cooling module provides refrigerant A corresponding heat load in load.Multiple liquid receivers associated with respective primary cooling module receive liquid condition Refrigerant.Secondary cooling module is selectively provided by associated with for having been detected by the primary cooling module of failure The supplement of the refrigerant of load flows.Each primary cooling module further includes for providing multiple first pumps of refrigerant.It is multiple First pump provides refrigerant to respective load associated with respective primary cooling module with the first temperature.Multiple second Condenser is from respective load-receipt refrigerant associated with respective primary cooling module.It is received by respective condenser Refrigerant is in the temperature higher than the first temperature.

A method of in a cooling system for providing redundancy cooling, method includes providing the primary cooling with circuit Module, primary cooling module provide cooling fluid to heat load.Method further includes providing secondary cooling module and bringing into operation Secondary cooling module.Method further includes that secondary cooling module is inserted into circuit, and secondary cooling module provides cooling fluid to heat Load.Control is in primary receiver associated with primary cooling module and secondary receiver associated with secondary cooling module Between primary receiver valve, to be connect in the forward horizontal stand that secondary cooling module is inserted into circuit in primary receiver and secondary Receive the pressure between device.Method further includes deactivating primary cooling module.

A method of for providing to cooling system Redundant Control, method includes providing multiple primary cooling modules, just Grade refrigerating module provides refrigerant and passes through respective heat load.Method further includes providing corresponding to respective primary cooling module Multiple liquid receivers, each liquid receiver is from respective condenser receiving liquid associated with respective primary cooling module The refrigerant of body state.Secondary cooling module is selectively provided by load associated with the primary cooling module of selection The supplement of refrigerant flows.

A kind of device comprising refrigerating module, refrigerating module provide refrigerant through overload.First controller and circuit First part is associated, and the first part in the circuit is associated with refrigerating module.The second part of second controller and circuit It is associated, and the second part in the circuit is associated with refrigerating module.In the first mode, the of the first controller control loop A part, and the second part of second controller control loop.In a second mode, in the first controller or second controller A controller control another in the first part of both first and second parts or circuit or the second part in circuit.

From explanation in this is provided so that the other field of application also becomes apparent.Explanation in Summary and Specific embodiment is only for illustrative purposes without limiting the scope of the present disclosure.

Detailed description of the invention

Attached drawing description is herein just to the illustrative purpose of the embodiment of selection, and not all possible reality It applies, and does not limit the scope of the present disclosure.

Fig. 1 is attached to the schematic diagram of the primary cooling circuit of chilled water circulation；

Fig. 2 is the schematic diagram of the cooling system with the primary cooling circuit using vapor compression refrigeration system；

The schematic diagram for the cooling system that Fig. 3 is arranged according to the first construction；

Fig. 4 is the schematic diagram of Fig. 3 cooling system, and wherein redundancy pump component is initially used in operation；

Fig. 5 is the schematic diagram of Fig. 3 cooling system, and it illustrates redundancy pump components and the load failed with main pump unit；

Fig. 6 is the schematic diagram of the cooling system of Fig. 3, wherein deactivated main pump unit is initially used in recovery；

Fig. 7 is the schematic diagram that previously deactivated main pump unit is resumed operation；

Fig. 8 is the flow chart for describing Fig. 3, describes the process for starting redundancy pump component and keeping main pump unit deactivated；

Fig. 9 is the flow chart for describing the process for starting main pump unit and keeping redundancy pump component deactivated；

Figure 10 is the schematic diagram of the pump unit with the Redundant Control for chilled-water flow control；

Figure 11 is the flow chart for describing the process for executing the control of redundancy chilled-water flow；And

Figure 12 is the flow chart for describing the second process for executing the control of redundancy chilled-water flow.

Identical appended drawing reference indicates identical part in multiple diagrams through attached drawing.

Specific embodiment

The embodiment enumerated is more completely described with reference to attached drawing now.

The embodiment enumerated is provided so that the disclosure can be thorough, and model fully is expressed to those skilled in the art It encloses.It illustrates many specific details, such as the example of specific components, apparatus, and method, implements in order to provide to the disclosure The thorough understanding of example.It is apparent it will be understood by those skilled in the art that specific details need not be used, the embodiment enumerated can be with It is summarised in many different forms, and also should not be construed as limiting scope of disclosure.In certain embodiments enumerated, Well-known process, well-known apparatus structure, widely-known technique do not describe in detail.

Using the purpose of term in this specific embodiment for illustration only, and not want to limit.Work as use At this moment, singular " one ", "one" and "the" can also be used to include plural form, unless context table expressly otherwise Show.Term " includes ", " containing ", "comprising" and " having " are identical, and therefore illustrate existence feature, whole, step Suddenly, it runs, element and/or component, but does not interfere the presence of or increase one or more other features, whole, step, operation, Element, component, and/or combination thereof.Method and step in this, process are described, and is operated in specifically when sequentially discussing or show It is not considered necessary, unless being specifically determined as the sequence of performance.It can be appreciated that can be using other or choosing The step of selecting property.

When element or layer be known as " ... on ", " being joined to ", " being connected to " or " being integrated to " another element or when layer, May directly on it, engage, connect or be integrated to another element or layer, or insertion element or layer can occur.On the contrary , when element is known as " on directly existing ... ", " directly engaging ", " being connected directly to " or " being bonded directly to " are another When one element or layer, element or layer may be not inserted into.Other words for describing relationship between elements should be with similar Mode explain (for example, " ... between " it is corresponding with " between directly existing ... ", " neighbouring " and " being immediately adjacent to " are opposite Answer etc.).When used herein, term "and/or" includes that one or more correlations draw up any of project and all combination.

Although term the first, the second, third etc. be can be used herein to describe different elements, component, region, layer And/or part, but these elements, component, region, layer and/or part should not be limited by this term.This term can To be used only for from an element, component, region, another element, component, region, layer or part are distinguished in layer or part.Term Such as " first ", " second " and other numerical value terms are worked as using order or sequence is not implied that at this moment, unless clear by context Indicate to Chu.Therefore, the first element being discussed below, component, region, layer or part can be term second element, component, Region, layer or part, without departing from the introduction of citing embodiment.

The term of space correlation, such as " inside ", " outside ", " ... under ", " being lower than ", " lower part ", " being higher than ", " on Portion " etc. can be used herein convenient for explanation, when being shown in figure, to describe an elements or features for another The relationship of elements or features.The term of space correlation can be used to be included in use or fortune in addition to the direction described in figure Different direction when row.For example, if device is reversed in figure, element be described as " being lower than " or " ... under ", it is other Elements or features will then be directed " being higher than " another elements or features.In this way, embodiment term " being lower than " may include height In the direction with the two being lower than.Device can be otherwise oriented and (be rotated by 90 ° or with other directions) and using in this The description of space correlation is respectively explained.

Fig. 3 describes the schematic diagram of the pump refrigerant cooling system 100 with redundancy pump component.Pump refrigerant is cooling System 100 includes multiple cooling subsystem 110a, 110b ..., 110n, each has respective primary pump unit 120a, 120b ..., 120n.Each primary pump unit 120a, 120b ..., 120n, which are provided, is pumped into heat exchanger or cold for working fluid But device 122a, 122b ..., 122n.Each cooling unit 122a, 122b ..., 122n are in cooled environment, such as Data room.It should notice that n can be any positive integer and indicate the quantity of the element selection of the similar setting in figure.Example Such as, pump unit 120a, 120b ..., 120n are related to n pump unit.Those skilled in the art recognize that the quantity of pump unit can be with Variation depends on the particular implementation for describing pump refrigerant cooling system 100 in this.This quantity convention can describe it Its similar unit.In some cases, n (or other quantity) units can jointly be used reference numbers Description rather than a, b ..., n.In addition, it can be used for describing similar element through the same appended drawing reference of specification.

Each main pump unit 120 includes the first pump 124 and the second pump 126, to be pumped by working fluid to respective Check-valves 132,134.The first redundant configuration can be set into pump 124,126.Alternatively, pump 124,126 can be set into common Ground applies output pressure to fluid, and fluid flowing arrives outlet line 136 by respective check-valves 132,134.Pump 124, 126 can be controlled to both provide redundancy and be operated together.In various embodiments, main pump unit can be configured to province One slightly in pump 124,126.

Cooling unit 122 is used for by the fluid that outlet line 136 pumps.Many constructions can be presented in cooling unit 122, Construction comprising the evaporator 30 similar to Fig. 1 and Fig. 2.Cooling unit 122 is arranged in the environment, desirably passes through there It transfers heat into and removes heat from environment locating for cooling unit 122 by the fluid that outlet line 136 pumps.From out The fluid of mouth pipeline 136 enters cooling unit 122 with the first temperature, and cooling unit is discharged with high temperature in pipeline 140 122.The fluid pumped by cooling unit 122 can also change state to gas phase from liquid phase.Commonly known as suction line 140 Pipeline 140 by working fluid return to main pump unit 120.

Fluid in suction line 140 is input into condenser 138.Condenser 138 receive have the first density (such as Gas) first state working fluid, and the heat in working fluid is discharged to more high density (such as liquid) The output fluid of second state.Fluid changes state by condenser 138 from gas phase to liquid phase.Condenser 138 receives next self cooling Freeze the chilled water (showing with the pump unit 120 in Fig. 3) that water inlet pipeline 139 provides.Chilled water by condenser 138 recycle with Just heat is removed from from the received working fluid of suction line 140.Chilled water is returned from condenser 138 will pass through chilled water Outlet line 141 (showing in the pump unit 120 of Fig. 3) provides chilled water.The output of condenser 138 is by being input to receiver 142 return line 144 is exported.Receiver 142 recycles the working fluid for using by pump unit 120.Receiver 142 Working fluid is pumped 124,126 back to respective by receiver export pipeline 143.Bypass line 146 bypass receiver with Fluid is set to flow directly to receiver export pipeline 143 from the outlet of condenser 138, to bypass receiver 142.Receiver output Pipeline 143 provides working fluid to pump 124,126 by respective pump intake pipeline 148,150.

Except main pump unit 120a, 120b ..., 120n, redundancy pump component 120 ' includes the pump refrigerant in Fig. 1 In cooling system 100.Redundancy pump component 120 ' provides working fluid with a pressure, as a result any main pump unit 120a, 120b ..., 120n should become to fail.In such a way, to another pump unit, thus pump unit 120 ' provides redundancy It is kept for the uptime and the refrigerating function for any cooling unit 122 relevant to deactivated main pump unit is provided.

The pump unit 120 of the similar foregoing description of redundancy pump component 120 ' configures.Pump unit 120 ' is also comprising being output to cooling The liquid line 136 ' of each of unit 122a, 122b ..., 122n.Liquid line 136 ' passes through respective gate valve 154a, 154b ..., 154n and each liquid line 136a, 136b ..., 136n connection.Redundancy pump component 120 ' also by Steam pipe line 140 ' receives working fluid.Steam pipe line 140 ' by respective mixing valve 156a, 156b ..., 156n with it is each A steam pipe line 140a, 140b ..., 140n connection.Redundancy pump component 120 ' also includes redundancy reception device link 158 ', warp Respective valve 160a, 160b are crossed ... each link receiver 142a, 142b ..., the 142n of 160n.Controller 162 send and Monitoring and the control signal of the component selected in pump refrigerant cooling system 100 are received, it is cooling to influence pump refrigerant The control of system 100.

The operation of system is described relative to Fig. 4-7.When unit becomes or must deactivate, because main pump unit 120 Different service conditions, therefore start redundancy unit 120 ' to replace deactivated main pump unit.For example, if main pump unit 120a needs to fail, then starts redundancy pump component 120 ' in order to provide the pumping function for deactivating main pump unit 120a.When this hair When raw, valve 160a is opened to connect receiver 142a and receiver 142 ', as shown in figure 4, make receiver 142a with Pressure between 142 ' is balanced.By in Fig. 4 thick line indicate to equalize by receiver chain 158 '.In preset time After period, the balanced pressure between the receiver 142a of main pump unit 120a and the receiver 142 ' of redundancy pump component 120 ' Power.

Once pressure is balanced, redundancy pump component 120 ' starts to provide for cooling unit related to main pump unit 120a The pumping function of 122a.As shown in figure 5, in order to which redundancy pump component 120a provides the pumping function for cooling unit 122a, valve 156a It opens so that the working fluid of the form for being typically in steam exported from cooling unit 122a passes through 140 ' quilt of steam pipe line It guides to the condenser 138 ' of redundancy pump component 120 '.Also during being transformed into redundancy pump component 120 ', valve 154a open so as to Liquid line 136 ', which provides, is typically in the working fluid of liquid condition to cooling unit 122a.The switch of valve 156a and 154a Redundancy pump component 120 ' is set to be capable of providing the pumping function for main pump unit 120a.The fluid flowing of redirection, which is directed toward to provide, to be used for Deactivate the redundancy pump component 120 ' of the pumping function of main pump unit 120a.This is shown by the thick line in Fig. 5.Main pump unit 120a energy Therefore it is deactivated.Receiver valve 160a is then shut off.

Once determining to restore main pump unit 120a, thus needs redundancy pump component 120 ' to fail, class described above occurs As process.

In order to start that deactivated main pump unit 120a is returned to the process of operating status, receiver valve 160a is open to allow Pressure of the equilibrium between the receiver 142a of pump unit 120a and the receiver 142 ' of redundancy pump component 120 '.This is in Fig. 6 It indicates, wherein showing the fluid flowing in the receiver chain 158 ' for counterpressure with thick line.In various embodiments, Receiver valve 160 can be set in normally opened construction and be selectively gated off so that specific and relevant receiver 142 is isolated. Once pressure is equalised, then fluid circuit of the main pump unit 120a starting so as to working fluid through pump unit 120a is pumped It send.In order to generate this transformation, valve 156a adjust to close the output of cooling unit 122a and redundancy steam pipe line 140a ' it Between connection.This guidance fluid reaches the entrance and condenser 138a of pump unit 120a from the outlet of cooling unit 122a.In addition, Valve 154a is closed so that the outlet of pump unit 120a provides working fluid by liquid line 136a to the defeated of cooling unit 122a Enter.The closing of valve 154a is also breaking at the flowing of working fluid on redundancy steam pipe line 136 '.The receiver valve of pump unit 120a The stream that 160a is also switched off to be breaking between the receiver 142a of pump unit 120a and the receiver 142 ' of redundancy pump component 120 ' Body connection.Therefore, pump unit 120a resumes operation, as shown in the thick line of Fig. 7.

Fig. 8 provides the flow chart of the non-limiting examples for the handoff procedure from primary pump unit to redundancy pump component. Control originates in block 170 and proceeds to block 172.Block 172 is balanced in the primary pump unit being deactivated and the redundancy being activated pump Receiver pressure between unit.Then control proceeds to block 174, starts redundancy pump component.Once redundancy pump component starts, Control proceeds to block 176, and control valve is arranged to fluid flow transition to the redundancy pump component far from primary pump unit there. Then control proceeds to block 178, and primary pump unit is deactivated there.In some embodiments, with the mistake of primary pump unit Effect, control proceed to block 180, and primary receiver valve is closed there.Process terminates in block 182.

Fig. 9 is described for backing pump to be returned to the effective status being connected to cooling unit and deactivates redundancy pump component Non-limiting examples block diagram.Control originates in block 190 and proceeds to block 192, and equilibrium is respective for being deactivated Redundancy pump component and by the receiver of effective primary pump unit.Then control proceeds to block 194, there with expected turn Change the primary pump unit of starting.With the starting of primary pump unit, control proceeds to block 196, changes valve so as to switching flow stream Move primary pump unit and far from redundancy pump component.Then control proceeds to block 198, and then redundancy pump component is stopped there With.In some embodiments, as the failure of redundancy pump component, control proceed to block 200, primary receiver valve is closed there It closes.Then control, which proceeds to, terminates block 202.

Figure 10 describes the cooling system 210 according to different embodiment settings.Cooling system 210 includes for providing pump It is sent to the pump unit 220 of the fluid of cooling unit (Figure 10 is not shown).Pump unit 220 similarly runs to pump described above Unit 120.Pump unit 220 includes built-in redundancy in various embodiments, and can be share common condenser and A pair of receiver dual or parallel pump unit, valve and controller.

Pump unit 220 provides the fluid of pumping by export pipeline 136 to cooling unit or load 122.At cooling unit In an environment, where it is desired that by transferring heat into the fluid pumped by outlet line 136 come from cooling Heat is removed in environment locating for unit.As described above, the fluid from export pipeline 136 enters cooling unit with the first temperature And cooling unit is discharged with high temperature by pipeline 140.The fluid for being pumped across cooling unit can also change from liquid phase to gas phase Change state.

Chilled water inlet pipeline 139 and chilled water outlet pipeline 141 is also shown in Figure 10.Chilled water passes through suction line 139 It is input to condenser 138.Chilled water is provided from frozen headwater (Figure 10 is not shown), such as building chilled water.Chilled water passes through Condenser 138 realizes heat transmitting will pass through the fluid that outlet line 136 and suction line 140 are recycled from condenser 138. Chilled water passes through 141 eductor condenser 138 of chilled water outlet pipeline.

The connection of chilled water outlet pipeline 141 has the redundancy of the first branch of a circuit 226 and second, redundant loop branch 226 ' Detect and control circuit 224.It should be noted that branch of a circuit 226,226 ' is set with usual balanced configuration, and any circuit Branch can be respectively the branch of a circuit for indicating such as primary or redundant loop branch or being properly termed as operation and suspend mode.Each Branch of a circuit 226,226 ' includes a pair of of the valve 232,232 ' for being connected to chilled water outlet pipeline 141.The output of valve 232,232 ' It is to combine and be input to flowmeter 236.In various embodiments, valve 232,232 ' can be and return as normally closed spring Return valve.

In various embodiments, control loop 224 also includes a pair of control device 238,238 ', is pumped for left and right side Unit 220 provides redundancy.Controller 238 is connected to by control line 242 with valve 232.Similarly, controller 238 ' passes through control line 242 ' are connected to valve 232 '.Controller 238 is connected to by control line 240 with pump 124.Similarly, controller 238 ' passes through control Line 240 ' is connected to pump 126.In various embodiments, controller 238 by signal wire 246 also comprising being used to monitor variable-flow The signal wire of valve 232 ', and controller 238 ' monitors the state of variable-flow valve 232 by signal wire 246 '.Controller 238, 238 ' can be signal or data line by 230 connection of connection, connection 230.

In operation, pump unit 220 plays the redundancy running circuit for sharing common condenser 138 and receiver 142 Effect.Controller 238, valve 232 with pump 124 and mutually powered-down and fluid line include circuit the first redundancy section, and Controller 238 ', valve 232 ' and pump 126 and it is mutually powered-down with fluid line include circuit the second redundancy section.Different In embodiment, the controller 238,238 ' that the control selections between the redundancy section in circuit pass through by 230 communication of connection is sent out It is raw.Connection 230 can be signal wire in various embodiments, or can be data line in other embodiments.In difference Embodiment in, controller 238,238 ' by keep another controller generate signal in the connection 230 of dormant state Carry out arbitration control.For example, as long as controller 238 generates signal, being controlled if controller 238 generates signal in connection 230 Device 238 ' processed will remain in dormant state.If controller 238 terminates and generates signal in connection 230, controller 238 ' will Start and correspondingly generate signal in connection 230, controller 238 will be kept in dormant state.In different other realities It applies in example, controller 238,238 ' can be communicated via connection 230 by exchanging data, to arbitrate to pump unit 220 Control.

In various embodiments, controller 238 can control and monitor the various pieces of its redundant loop, include valve 232, pump unit 124 and relevant connection and control line.The each of the redundant loop for it can be similarly monitored in controller 238 ' The component of a part.If controller 238 detects the failure in its any respective circuit element, it is included in controller sheet Failure within body, then controller 238 can close, and thus transfer control to device 238 '.Controller 238 ' is similarly Operation, and start controller 238 when the failure in the respective redundant loop part that controller 238 ' detects it.

In various embodiments, controller 238,238 ' the respective valves 232,232 ' of control, pump 124,126 and monitoring stream Meter 236.In various embodiments, flowing of the monitoring of controller 238 in opposite branch of a circuit 238 ' is flowed to determine Interruption whether have occurred and that.Similarly, in various embodiments, controller 238 ' monitors fluid in opposite branch of a circuit Flowing, so as to determine flowing interruption whether have occurred and that.Occur if interrupted, relation control circuit becomes to activate.Make For infinite embodiment, 238 control valve 232 of controller.Controller 238 also monitors flow valve 232 ' by signal wire 246 Operation.The operation of controller 238 flows the flowing for passing through valve 232 to control.Controller 238 ' is relative to valve 230 ' and 232 class of valve As run.238 ' control valve 232 ' of device is similarly controlled.Controller 238 ' also monitors flow valve 232 by signal wire 246 ' Operation.The operation of controller 238 ' flows the flowing for passing through valve 232 ' to control.

In various embodiments, controller 238,238 ' can control fluid by respective branch of a circuit 226,226 ' Flowing and respectively or jointly run, so as to control outlet line 141 fluid flowing.In different embodiments In, one in controller 238,238 ' can control fluid by the flowing of its respective branch of a circuit 226,226 '.Such as Fruit failure should occur in any branch of a circuit element relevant to specific controller, then liquid flowing control can be presented simultaneously And it is controlled by using another controller of another branch of a circuit.In this different embodiment, fluid is only Flowing is by one in branch of a circuit 226,226 '.

In different other embodiments, fluid flowing can be sent out by each respective branch of a circuit 226,226 ' It is raw, so that the flowing of combination provides the flowing that the fluid needed passes through chilled water outlet pipeline 141.In this different embodiment In, the fluid of flowing can be separated, therefore the flowing of approximately half of fluid occurs by a branch of a circuit 226, and another The flowing of one semifluid occurs by branch of a circuit 226 ', is thus combined into for by the required of chilled water outlet pipeline 141 Whole fluid flowings.If any branch of a circuit 226,226 ' breaks down, then its branch of a circuit can pass through the respective of it Controller be deactivated (failure), and by another branch of a circuit fluid flowing can be increased, with keep need Chilled water outlet pipeline 141 is passed through in fluid flowing.

Figure 11 describes the flow chart 250 for the operation for proving that the redundant loop branch of Figure 10 implements.Control starts starting Block 252 and proceed to decision block 254.In decision block 254, test is executed to determine that failure whether there is in primary circuit point Branch.Primary circuit branch can arbitrarily be used as one of branch of a circuit 226,226 ' and determine, retain remaining branch of a circuit As redundancy, secondary or other branch of a circuit.It can be assumed that branch of a circuit 226 is primary circuit branch.If without event Barrier occurs in primary circuit branch 226, and control returns to decision block 254, retest there.If in primary circuit branch It breaks down in 226, control proceeds to block 256, and secondary cycles branch 226 ' switchs there.In different embodiments In, then switching can be stopped being influenced by controller 238, this causes controller 238 ' to bring into operation.In different other realities It applies in example, control can terminate and return to 254.In various embodiments, then control proceeds to block 258, complete there At test to determine whether branch of a circuit failure has been removed.If it is not, control returns to block 258, repeat there Test.If failure has been removed, control proceeds to block 260.In block 260, by opening respective shut-off valve 230 and unsteady flow It measures valve 232 and closes secondary valve 230 ' and close or reduce fluid flowing by secondary flow valve 232 ', to realize to first The return of grade branch of a circuit.Then control proceeds to block 262, and process is completed there.

Pass through chilled water outlet pipe when each of both branch of a circuit 226,226 ' of Figure 10 provide a part of fluid flowing When line 141, Figure 12 describes the block diagram 270 of the scheme of guiding redundancy.Since control starting block 272 and proceeds to block 274, two branch of a circuit are run so that (equally or unequally) shares the flowing by chilled water outlet pipeline 141. Then control proceeds to decision block 276, complete test so as to determine in one of two branch of a circuit 226,226 ' whether Change failure in the presence of load.If not detecting that load changes or failure, control return to decision block 276, retest. Change or failure are loaded if detected, control proceeds to block 278, there by control associated pump and valve in redundancy or event Hinder and adjusts flowing in branch of a circuit.Control proceeds to block 280, and the fluid flowed in primary circuit there is adjusted to maintain Pass through chilled water outlet pipeline 141 with the rate flowing of needs.Control proceeds to block 282, executes test there to determine Whether the failure in fault loop branch has solved.If load change or failure do not solve, control returns to test block 282, retest there.If load change failure has solved, control proceeds to block 284, there adjustment flowing By the fluid of initial cycle branch.Control proceeds to block 286, is adjusted to there by the flowing of redundant loop branch Both branch of a circuit 226,226 ' share the fluid that outlet line 141 is passed through in flowing.Control proceeds to block 288 next time, there Process is completed.

The purpose that the above description of embodiment is used to show and illustrate is provided.It is not intended in detail or limits this hair It is bright.The individual elements or features of specific embodiment are typically not limited to specific embodiment, still, wherein be suitble to, being can The sum exchanged can be used for the embodiment of selection, even if not being specifically to show or describe.It is identical to change in various aspects Become.This variation is not to be regarded as a departure from the present invention, and all this deformations are determined as comprising within the scope of the present invention.

Claims (9)

1. a kind of cooling system, comprising:

Multiple primary cooling modules, each primary cooling module include the first pump for circularly cooling agent, and the first pump is with first Temperature provides refrigerant to evaporator, and the first condenser for receiving refrigerant from evaporator, the first Liquid acquisition Device receives liquid from the first condenser, is in the temperature higher than the first temperature, Mei Gechu by the received refrigerant of the first condenser Grade refrigerating module passes through corresponding evaporator circularly cooling agent；

Multiple first liquid receivers, the first liquid receiver is associated with corresponding primary cooling module and is used for from corresponding Primary cooling module condenser receive liquid condition refrigerant；With

Secondary cooling module, secondary cooling module include the second pump and the second condenser and for recycling the refrigerant Two liquid receivers, the second condenser receive refrigerant from evaporator, and second liquid receiver receives liquid from the second condenser, The temperature higher than the first temperature, one selected in each primary cooling module are in by the received refrigerant of the second condenser When a primary cooling module is deactivated, secondary cooling module is controlled to pass through the corresponding evaporator of selected primary cooling module Enable the secondary cooling module,

Wherein, it when enabling the secondary cooling module, is turned on by the fluid stream that receiver links, the receiver link The first liquid receiver of each of the multiple primary cooling module is fluidly connected to the second liquid receiver, to select Balance to selecting property selected respective primary refrigerating module corresponding first liquid receiver and the second liquid receiver it Between pressure.

2. cooling system according to claim 1 further includes being arranged in each first liquid receiver and second liquid receiver Between receiver link in receiver valve, so as to by means of the control of the first controller in each first liquid receiver and the Fluid flowing between two liquid receivers.

3. cooling system according to claim 1, further includes:

For controlling between corresponding evaporator inlet and a refrigerating module of primary cooling module and secondary cooling module The inlet valve of fluid flowing；With

Described in controlling in the primary cooling module in evaporator outlet and secondary cooling module and multiple refrigerating modules The outlet valve that fluid flows between one refrigerating module.

4. cooling system according to claim 1, further includes:

First valve, first valve have the entrance for the chilled water outlet pipeline for being connected to the first condenser；

Second valve in parallel with the first valve, and the second valve has a primary cooling module being connected in multiple refrigerating modules The first condenser chilled water outlet pipeline entrance；

The first controller associated with the first valve；With

Second controller associated with the second valve,

Wherein in the first mode, the first controller controls the first valve, and second controller controls the second valve, and in the second mould In formula, a controller of the first controller or second controller controls a respective valve in the second valve or the first valve.

5. cooling system according to claim 4, wherein the first controller and one primary in multiple refrigerating modules are cold But the first pump of module is associated, and the of one primary cooling module in second controller and multiple refrigerating modules Three pumps are associated, the first pump, the first valve and the first control of one primary cooling module in plurality of refrigerating module Device forms the first circuit, and the third of one primary cooling module in multiple refrigerating modules pump, the second valve and second are controlled Device processed forms second servo loop, and the cooperation of the first and second circuits is redundantly to control cooling system.

6. cooling system according to claim 4, wherein the first controller and second controller pass through electrical connection communication.

7. cooling system according to claim 6, wherein when a controller of the first controller or second controller starts When communicating between them, a controller of the first controller or second controller starts the component of communication control cooling system, And the control unit of the cooled system of another controller of the first controller or second controller is forbidden.

8. cooling system according to claim 4, wherein which controller the first controller and second controller communication to determine Control the particular elements of cooling system.

9. cooling system according to claim 4, wherein the first controller monitors the shape of at least one of the second valve or third pump State, and second controller monitors the state of at least one of the first valve or the first pump.