CN102052733A - Method for effectively operating cooling system - Google Patents
Method for effectively operating cooling system Download PDFInfo
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- CN102052733A CN102052733A CN2009102090995A CN200910209099A CN102052733A CN 102052733 A CN102052733 A CN 102052733A CN 2009102090995 A CN2009102090995 A CN 2009102090995A CN 200910209099 A CN200910209099 A CN 200910209099A CN 102052733 A CN102052733 A CN 102052733A
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Abstract
The invention discloses a method for effectively operating a cooling system by using a system which can control average cooling capability. In the method, a loop which is specially arranged by constructing components of the cooling system is described; a refrigerant is alternatively injected and stopped from being injected into an evaporator according to a preset time interval or preset differential room temperature control; and the components comprise a compressor, a condenser, an expansion valve, (a plurality of) evaporators, an evaporation pressure regulator, an electromagnetic valve and/or a three-way valve. The system acts so as to control the operation of an air conditioner similar to systems which control an air-conditioning system by using an inverter, but has simpler technology, is easier to repair and maintain and is cheaper. Moreover, the method can also be applied to a variable refrigerant volume (VRC) type or multi-fan coil type cooling system.
Description
Technical field
Air-conditioner and cooling system.
Background technology
This invention relates to the energy that the effective manipulation about cooling system when there is big variations in temperature in run duration or air-conditioning reduces a lot with consumption.From the service cycle of the compressor of each startup air-conditioner, greatly consumes energy.Therefore, especially when room temperature exists bigger variation and frequent variations, unnecessarily expend too much energy.Thermostat is automatic switch very continually.The startup of compressor is very frequent too, and then expends more energy than actual needs.In order very to avoid such mistake macro-energy consumption during the frequent variations, in the prior art, developed the system that a kind of use has the air-conditioner of frequency-changeable compressor in temperature.But this technology is too complicated, be difficult to repair, and in addition, its cost is also very expensive.For solving such problem, the invention describes a kind of method that is used to control the average cooling capacity of the system that uses conventional compressor.Performance is roughly the same, but technology is much simple, and R and M is easier, and more cheap.Neoteric this system can use with VRV (variable refrigerant volume) formula or multi fan coil pipe (multi-fancoil) formula air-conditioning system.
Summary of the invention
A kind of by using the system that can control average cooling capacity effectively to move the method for cooling system.This method has been described by the loop (circuit) of the specific arrangements of the assembly of structure cooling system and has alternately been controlled refrigerant " injection " and " stopping to inject " evaporimeter according to Preset Time section or default differential room temperature, and said modules is compressor, condenser, expansion valve, evaporimeter, evaporator pressure regulator, magnetic valve and/or triple valve.This method allows roughly to be equal to the effectively operation of control air-conditioning of ground with those systems that utilize inverter to control air-conditioning system.The invention discloses a kind of with simpler technology, be easier to repair or safeguard, more cheap and can also be applied to the method that variable refrigerant volume (VRV) formula or multi fan coiled cooling system are controlled cooling system.
Description of drawings
Fig. 1 is the conventional cooling circuit of prior art.
Fig. 2 shows and how magnetic valve V1 and V4 is added in the standard cooling circuit.
Fig. 3 shows magnetic valve V2 is added in the cooling circuit.
Fig. 4 shows how usefulness triple valve TWV1 replaces magnetic valve to carry out identical function.
Fig. 5 show through several running time section system is controlled at the diagrammatic sketch of 50% average size.
Fig. 6 show through several running time section system is controlled at the diagrammatic sketch of 75% average size.
Fig. 7 shows through 0.5 ℃ deviation or the differential room temperature diagrammatic sketch to the control of the average size of system.
Fig. 8 shows the use of the evaporator pressure regulator (EPR) of the magnetic valve V4 that replaces the loop among Fig. 3.
Fig. 9 shows the layout in the loop of the energy homogenizing cooling capacity that uses as a whole in system, it comprises duplexure, and duplexure has magnetic valve, expansion valve, evaporimeter and the evaporator pressure regulator of arranged in series to use in VRV formula or multi fan coiled air-conditioning system.
How Figure 10 shows the whole loop of compressor, condenser and Fig. 9 by arranged in series.
Figure 11 shows the loop of Figure 10 and has magnetic valve V0, the inlet of this magnetic valve is connected between condenser 2 and the shared adapter H1, and the other end is connected to expansion valve R0, and the outlet of this expansion valve is connected between shared adapter H2 and the compressor 1 to assist cooling compressor.
The specific embodiment
Fig. 1 shows the loop of the conventional air-conditioning system of prior art, and wherein, refrigerant is compressed from compressor 1 and flows into condenser 2, through expansion valve 3, and is injected into evaporimeter 4, flows back to compressor 1 then so that circuit complete.For connecting loop of the present invention, press Fig. 2 and operation shown in Figure 3 to improve the control of cooling system by the average size of control system.
As shown in Figure 2, magnetic valve V1 is added between condenser 2 and the expansion valve 3, and magnetic valve V4 is placed between evaporimeter 4 and the compressor 1.According to the flow direction of refrigerant magnetic valve V1 and V4 are installed.Fig. 3 shows and has also inserted magnetic valve 2, so that the inlet of this magnetic valve is connected between magnetic valve V1 and the condenser 2, and its outlet is connected to expansion valve 5, and the outlet of this expansion valve is connected between magnetic valve V4 and the compressor 1.
Control is to carry out by the opening and closing of control magnetic valve.Magnetic valve V1 and V4 open and close simultaneously, but opposite with magnetic valve 2.Above-mentioned operation is as follows: when magnetic valve V1 and V4 " opened ", magnetic valve V2 " closed ".Compressor 1 compression refrigerant flow to magnetic valve V1 so that it flows through condenser 2, further flows into expansion valve 3, and makes refrigerant inject evaporimeter 4 fully, flows through magnetic valve V4, flows back to compressor 1 then so that circuit complete.This is that compressor uses maximum power " to be fully loaded with " condition.But when magnetic valve V1 and V4 " close ", magnetic valve V2 will " open ", and can not inject refrigerant evaporimeter 4 this moment.This is to use minimum electric energy " zero load " condition.Control section or differential room temperature running time by default timer and/or thermostat respectively, alternately carry out above-mentioned operation.
The refrigerant that magnetic valve V2 " opens " to allow minimum flows into expansion valve 5, but only is enough to allow cooling compressor 1.The fact is under this " zero load " condition, system overheated very big, and can damage compressor.Thus, need be minimum with amount and the frequency optimization that injects refrigerant, but also can cooling compressor.On the other hand, too many refrigerant can damage compressor conversely.Therefore, by always inject refrigerant in system, control is possible, but also is variable, wherein, must be as much as possible the amount of the refrigerant under " zero load " condition be optimized for minimum.
Use timer or thermostat make magnetic valve " open " by control system and the operation of the cooling system that " closing " realizes is controlled, and then can control refrigerant is annotated the people or stopped to inject evaporimeter.This makes can control flowing of the interior refrigerant of air-conditioning system.By alternately change the period or the duration of " opening " and " closing " magnetic valve for each scheduled time slot, realized the ability of the operation of control air-conditioning system.
For example, as shown in Figure 5, for each period of 20 seconds, magnetic valve V1 and V4 " opened ", and lasting 10 seconds inject evaporimeter with refrigerant.This condition is " being fully loaded with " with default.When magnetic valve V1 and V4 " closed ", system was in " zero load " condition then.Therefore, in the following manner the flow velocity of refrigerant is carried out homogenizing:
20 seconds period continues 20 seconds injection refrigerant, is equivalent to 100% flow velocity.20 seconds period continues 10 seconds injection refrigerant, is equivalent to 50% flow velocity.
Therefore, under 50% flow velocity, the average size of system is controlled to be 50%.
Equally, as shown in Figure 6, continue 15 seconds injection refrigerant in 20 seconds whole period, make that flow velocity is 75%, and average size is 75%.
Fig. 7 shows when room temperature is set at 24 ℃, has 0.5 ℃ the default differential room temperature of " opening " and " closing " of being used for thermostat control magnetic valve.This process is that magnetic valve V2 " closes " when beginning, and magnetic valve V1 and V4 " open ", and therefore compressor moves under " being fully loaded with " condition.When room temperature was reduced to 24 ℃, control system made magnetic valve V1 and V4 " close ".And V2 " opens " and makes compressor be in " zero load " condition.Only rise to 24.5 ℃ in room temperature, magnetic valve V2 is " closing ", and magnetic valve V1 and V4 " opening ", to allow compressor turn back to " being fully loaded with " condition.Therefore, system alternately " opens " and " closing " only fluctuates in 0.5 ℃ scope to keep room temperature.
Thereby,, can effectively control this system by cooling system so-called " average size " by the flow velocity of the refrigerant in the control cooling system.
The operation of this system make free operation do not have compressor time point out of service, therefore, the startup that does not whenever have compressor during running time.This is completely different with the system that uses inverter, and electrophoresis can not occur and saved energy because of not needing to start compressor.At run duration, make the capacity of cooling system obtain better controlled by controlling the mean flow rate that between " being fully loaded with " and " zero load " condition, moves in each operation period, thereby meet the requirements.The result is control and optimizes the utilization of energy and meet the requirements, wherein, during " being fully loaded with " condition, the energy consumption maximum, and during " zero load " condition, the energy consumption minimum.Can be similar to the average size of determining cooling system and determine the mean value of operation.This average power that helps to be consumed equals to move the electric energy of actual needs.Do not exist energy unnecessary excessively to use.Therefore, the present invention moves with like the system class of using inverter, but energy consumption is much littler, simple and be easier to repair or safeguard.
As shown in Figure 4, remove the magnetic valve V1 and the V2 in loop among Fig. 3, TWV1 is placed on the appropriate location with triple valve, makes the inlet of this triple valve connect self cooling condenser 2, makes first outlet of triple valve be connected to expansion valve 3, and makes its second outlet be connected to expansion valve 5.
The control of the cooling system of Fig. 4 is carried out as follows: first outlet of magnetic valve V4 and triple valve TWV1 is " opening " and " closing " simultaneously, but opposite with second outlet of triple valve TWV1.Therefore, in step 1, first outlet " opening " of magnetic valve V4 and triple valve TWV1.Refrigerant is compressed from compressor 1, flows through condenser 2, exports through first of triple valve TWV1 and enters expansion valve 3, and pushed evaporimeter 4 fully, gets back to compressor 1 then so that circuit complete.This is the situation of system with " being fully loaded with " operation, and with the highest level consumed energy.
Under different situations, when magnetic valve V4 " closes ", and first outlet of triple valve TWV1 also " closes ", second outlet " opening " of triple valve TWV1, and make minimum refrigerant flow through and arrive expansion valve 5 and flow back to compressor 1.At this moment, there is not refrigerant in the evaporimeter 4.Therefore cooling system moves under " zero load " condition, and wherein, compressor uses minimum electric energy.Said system is according to the rhythm and pace of moving things of as shown in Figure 3 preset period of time or default differential room temperature and alternate run.
Fig. 8 shows the magnetic valve V4 that uses evaporator pressure regulator (EPR) to replace loop shown in Figure 3, to regulate the evaporating temperature (for air-conditioner, the temperature that is used for the cooling by evaporation agent is approximately 5 ℃) of refrigerant.For regulating the pressure of the refrigerant in the evaporimeter 4, magnetic valve V1 and V2 " open " and " closing " on the contrary.In first step, magnetic valve V1 " opens ", and magnetic valve V2 " closes ".This makes cooling system move under " being fully loaded with " condition.When magnetic valve V1 " closed ", magnetic valve V2 " opened " and allows system move under " zero load " condition.Along with magnetic valve V2 " opens ", minimum refrigerant flows into expansion valve 5 with cooling compressor 1.Said system is in the mode identical with Fig. 3, according to the preset period of time or the default differential room temperature alternate run of operation.
Fig. 9, Figure 10 and Figure 11 show the method that the invention cooling system that will have the homogenizing ability of describing among the present invention is applied to VRV formula or multi fan coiled, wherein, a condensing unit can be connected to two fan coil unit or more.Each unit is according to the load of each unit independent operating in the following manner:
Among Fig. 9, many fan coils are connected in parallel, and each duplexure is connected in parallel, and wherein, each duplexure is made up of the assembly that flows to arranged in series according to refrigerant.In No. 1 duplexure, refrigerant flows into the expansion valve R1 that refrigerant is injected fully evaporimeter E1 via magnetic valve V1, and flows out via evaporator pressure regulator EPR1.For No. 2 duplexures, refrigerant flows into the expansion valve R2 that refrigerant is injected fully evaporimeter E2 via magnetic valve V2, and flows out via evaporator pressure regulator EPR2.For the n duplexure, refrigerant flows into the expansion valve Rn that refrigerant is injected fully evaporimeter En via magnetic valve Vn, and flows out via evaporator pressure regulator EPRn.Duplexure is arranged in parallel, and wherein, refrigerant flows into from the shared adapter that is called as joint (Header) 1, H1 and arrives magnetic valve Vn side.Refrigerant imports the shared adapter that is known as joint 2, H2 from evaporator pressure regulator EPRn outflow.
As shown in figure 10, the inlet of compressor 1 is connected to shared adapter H2, and condenser 2 is connected between the adapter and shared adapter H1 from compressor 1, makes that thus major loop is complete.According to Figure 11, the inlet of magnetic valve V0 is connected between shared adapter H1 and the condenser 2, and wherein, the outlet of this magnetic valve is connected to expansion valve R0, and the outlet of expansion valve R0 is connected between shared adapter H2 and the compressor 1.Therefore, multi fan coiled air-conditioning system be equipped with can be under control the homogenizing cooling capacity to keep the temperature controlling system.
Above-mentioned operation starts from compressor 1 and will be compressed to fully from the refrigerant of all evaporators in the condenser 2, and refrigerant is in the free shared adapter H1 of inflow of institute of " opening " at magnetic valve Vn, and is diverted in each duplexure.Each duplexure and its duplexure independent operating.The size of each fan coil depends on distribution " load ", and needn't be identical to all duplexures.Each expansion valve Rn's is measure-alike, and is enough to refrigerant is injected evaporimeter En fully, and it is the capacity of " being fully loaded with " operation of duplexure.Constantly obtain default evaporating temperature and make evaporator pressure regulator EPRn play a role by the pressure in the evaporimeter En is adjusted into.For example, air-conditioner is set at about 5 ℃ with evaporating temperature.The sum total that operates to all duplexure operations of major loop.Therefore the capacity of compressor 1 equals the capacity sum of all fan coils under " being fully loaded with " condition.The size of condenser 2 must be enough greatly, " be fully loaded with " heat that moves under the condition and the total amount of heat of compressor 1 heat own with cooling compressor 1.
Move the period or preset " opening " and " closing " that differential room temperature (DT) is controlled magnetic valve Vn in each duplexure according to default, the operation of each duplexure can be independently.But it is overheated that the independence of each duplexure can cause, and can damage compressor 1.Occurring when overheated, therefore magnetic valve V0 must " open " injecting the refrigerant of optimal dose via expansion valve R0, thus effective cooling compressor 1, and prevent that compressor 1 is damaged (still, if optimal dose must for too much also damaging compressor).Alternatively, magnetic valve V0 always is controlled to be " opening ", wherein, uses the refrigerant of minute quantity, and be easy to adjust refrigerant.
As a result, by only using a condensing unit and at least one compressor unit just can control the average size of each duplexure.Therefore, VRV formula or multi fan coiled air-conditioning system can use the average cooling capacity of this system to control this system, and simpler than inverter compressor, be easier to R and M and more cheap.
It should be understood that without departing from the scope of the invention those of ordinary skill in the art can make amendment to foregoing description.Therefore, more than describing all the elements comprise all should be interpreted as descriptive and illustrative and nonrestrictive.It will also be appreciated that following claim is intended to contain all general and concrete features of the present invention described herein, and should belong to the scope of claim as all statements of the scope of the invention of entity language.
Claims (7)
1. one kind is used for by according to the assembly of the mobile following layout cooling circuit of refrigerant and effectively control the method for cooling system or air-conditioner: compressor (1), condenser (2), first magnetic valve (V1), first expansion valve (3), evaporimeter (4), second magnetic valve (V4), wherein, refrigerant is compressed by compressor and flows into condenser, and via magnetic valve (V1), expansion valve (3), evaporimeter (4) and magnetic valve (V4) outflow, flow back to compressor (1) then, and the use of wherein said second magnetic valve (V4) is optional;
The 3rd magnetic valve (V2) and second expansion valve (5) are added in the described loop, the inlet of wherein said magnetic valve (V2) is connected between condenser (2) and the magnetic valve (V1), and the outlet of described magnetic valve (V2) is connected to expansion valve (5), and the outlet of expansion valve (5) is connected between magnetic valve (V4) and the compressor (1).
2. the method that is used for effectively controlling cooling system or air-conditioner according to claim 1, wherein, cooling system to operate under " being fully loaded with " conditioned disjunction " zero load " condition all be possible,
Wherein, the operation of described " being fully loaded with " condition comprises step:
Compression from the refrigerant of compressor (1) so that it flows into condenser (2), flow out to described first magnetic valve (V1) that is in " opening " position, and inflow expansion valve (3), described refrigerant is injected fully evaporimeter (4), and via second magnetic valve (V4) outflow that is in " opening " position, flow back to compressor (1) then, described the 3rd magnetic valve (V2) is in " cutting out " position simultaneously; And
Wherein, the operation of described " zero load " condition comprises step:
Compression from the refrigerant of compressor (1) so that it flows into condenser (2), flow out to described the 3rd magnetic valve (V2) that is in " opening " position, and flow into described second expansion valve (5), inject compressor (1) with the minimum an amount of refrigerant that will be enough to cool off; And described first and second magnetic valves (V1 and V4) are in " cutting out " position, and do not have refrigerant to flow into evaporimeter (4), thus " zero load " condition of realization;
Wherein, according to by the Preset Time section of timer or thermostat or " opening " and " closing " of default differential chamber temperature control magnetic valve.
3. the method that is used for effectively controlling cooling system or air-conditioner according to claim 2, wherein in described cooling circuit, use triple valve (TWV1) to replace described first magnetic valve (V1) and described the 3rd magnetic valve (V2), and the inlet of wherein said triple valve (TWV1) connects from described condenser (2), first outlet of described triple valve is connected to first expansion valve (3), its second outlet is connected to second expansion valve (5), described first outlet by being connected to expansion valve (3) and magnetic valve (V4) " is opened " simultaneously and " close " and be connected to described second expansion valve (5) second export the opposite operation of carrying out, wherein, control the opening and closing of described assembly by timer or thermostat.
4. method according to claim 2, wherein, evaporator pressure regulator (EPR) substitutes described second magnetic valve (V4) or is additionally used outside described second magnetic valve (V4), and its position can link to each other with the system with the injection of controlling refrigerant before or after described second magnetic valve (V4).
5. method that is used for effectively controlling cooling system or air-conditioner, wherein, the flow direction according to refrigerant is constructed duplexure, this duplexure is by the magnetic valve (Vn) of arranged in series, expansion valve (Rn), evaporimeter (En) and evaporator pressure regulator (EPRn) are formed, and wherein, a plurality of duplexures are connected in parallel so that major loop flows into each inlet of magnetic valve (Vn) from the first shared adapter (H1) by refrigerant, and flow out from each evaporator pressure regulator (EPRn), flow into the second shared adapter (H2), thereby be compressed in the condenser to flow back to compressor.
6. the method that is used for effectively controlling cooling system or air-conditioner according to claim 5, the inlet that further is modified to additional magnetic valve (V0) is connected between the condenser and the described first shared adapter (H1), and outlet is connected to expansion valve (R0), the outlet of described expansion valve is connected between the described second shared adapter (H2) and the compressor, wherein, each duplexure is by using timer or thermostat and opening and closing that magnetic valve starts and finish the injection of refrigerant and independent operating and being controlled, wherein, described loop is applied to variable refrigerant volume (VRV) formula or multi fan coiled cooling system or air-conditioning system.
7. one kind by the system that is used for effectively controlling cooling system or air-conditioner according to the assembly structure of the mobile following layout cooling circuit of refrigerant: compressor (1), condenser (2), first magnetic valve (V1), first expansion valve (3), evaporimeter (4), second magnetic valve (V4), wherein, refrigerant is compressed by compressor and flows into condenser, and via magnetic valve (V1), expansion valve (3), evaporimeter (4) and magnetic valve (V4) outflow, and flow back to compressor (1), the use of wherein said second magnetic valve (V4) is optional;
The 3rd magnetic valve (V2) and second expansion valve (5) are added in the described loop, the inlet of wherein said magnetic valve (V2) is connected between condenser (2) and the magnetic valve (V1), and the outlet of described magnetic valve (V2) is connected to expansion valve (5), and the outlet of expansion valve (5) is connected between magnetic valve (V4) and the compressor (1);
Add timer and/or thermostat " opening " and " closing " to control described magnetic valve.
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| CN2009102090995A CN102052733A (en) | 2009-10-30 | 2009-10-30 | Method for effectively operating cooling system |
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Cited By (9)
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| CN103148652A (en) * | 2013-03-06 | 2013-06-12 | 四川长虹电器股份有限公司 | Control method, control device and refrigeration system |
| GB2512215A (en) * | 2011-09-16 | 2014-09-24 | Safehouse Habitats Scotland Ltd | Air conditioning unit |
| CN104640420A (en) * | 2013-11-21 | 2015-05-20 | 珠海格力电器股份有限公司 | Cooling system of heating power device |
| CN109114666A (en) * | 2017-06-22 | 2019-01-01 | 上海海立电器有限公司 | Frequency-conversion air-conditioning system |
| CN109539433A (en) * | 2018-10-15 | 2019-03-29 | 平安科技（深圳）有限公司 | Cooling water train, loop control scheme and storage medium |
| CN109612143A (en) * | 2018-11-28 | 2019-04-12 | 宁波奥克斯电气股份有限公司 | A kind of air-conditioning and its control method of the condenser that can be changed with heat exchange area |
| CN113645811A (en) * | 2021-08-18 | 2021-11-12 | 潍柴动力股份有限公司 | Controller assembly, vehicle and controller cooling method |
| CN113924157A (en) * | 2019-11-15 | 2022-01-11 | 普莱克斯技术有限公司 | Energy-saving VPSA system using directly-driven high-speed centrifugal compressor |
| CN115097878A (en) * | 2022-06-23 | 2022-09-23 | 北京京仪自动化装备技术股份有限公司 | Control method and control system of temperature control system and temperature control system |
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| CN115097878A (en) * | 2022-06-23 | 2022-09-23 | 北京京仪自动化装备技术股份有限公司 | Control method and control system of temperature control system and temperature control system |
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Application publication date: 20110511 |