CN102628630B - Control method of air-cooling water chiller unit - Google Patents
Control method of air-cooling water chiller unit Download PDFInfo
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- CN102628630B CN102628630B CN201210069516.2A CN201210069516A CN102628630B CN 102628630 B CN102628630 B CN 102628630B CN 201210069516 A CN201210069516 A CN 201210069516A CN 102628630 B CN102628630 B CN 102628630B
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Abstract
The invention provides a control method of an air-cooling water chiller unit. The air-cooling water chiller unit comprises a compressor and an air-side condenser unit communicated with an exhaust port of the compressor, wherein each air-side condenser is provided with a fan for cooling refrigerants flowing through the exhaust port. The control method includes: step 1 after the air-cooling water chiller unit is started up, judging whether exhaust pressure of the compressor is in a set pressure range and whether continuous operating time of the air-cooling water chiller unit reaches the set time, and entering step 2 on yes judgment; step 2 summing the operation power of the compressor, the sum of the operation power of all started-up fans in the air-side condenser unit and practical refrigerating amount of the air-cooling water chiller unit to obtain a first power value; and step 3 determining a power interval the first power value belongs to and determining the number of the started-up fans in the air-side condenser unit and rotating speed of each fan to be started up according to the power interval the first power value belongs to. The control method improves energy efficiency of the air-cooling water chiller unit when the compressor operates with partial load.
Description
Technical field
The present invention relates to a kind of control method of wind-cooled cold-water unit.
Background technology
Air-cooled water cooling machine group is a kind of main central cold source equipment of central air conditioner system, as shown in Figure 1, show a compressor, the situation of a condenser, an evaporimeter, it generally consists of compressor 101, air-cooled condenser 102, expansion valve 110, evaporimeter 103 and other accessory, 104 pairs of air-cooled condensers of cooling blower 102 carry out cooling, and cold-producing medium in evaporimeter 103 absorbs heat when work, thereby provide low-temperature receiver for air-conditioning system.In Fig. 1, A represents that chilled water enters, and B represents that chilled water goes out.
In wind-cooled cold-water unit prior art, air-blower control adopts the mode of controlling exhaust and differencial pressure suction or pressure, control fan operating numbers and rotating speed, operate under sub-load condition, easily occur that fan operation and compressor behavior can not mate, cause compressor operating in sub-load, but blower fan standard-sized sheet, or fan operation quantity reduces, compressor operating is in higher load, easily there is the frequent adjusting of blower fan or startup in above situation, long-play can cause blower fan to damage and efficiency reduces.Unit part load performance can not better be brought into play, and systematic function performance is insufficient, and the efficiency of unit is general, can not perform to optimum state.
For example, publication number is 102003822 Chinese patent application, it discloses a kind of wind-cooled cold-water unit and control method thereof, between the compressor of described wind-cooled cold-water unit and reservoir, be provided with condensation module, condensation module comprises one or more first kind condensation submodules and one or more Equations of The Second Kind condensation submodule, each Equations of The Second Kind condensation submodule comprises Equations of The Second Kind condenser and the condenser magnetic valve connecting successively, Equations of The Second Kind condensation submodule is also provided with for controlling the condenser pressure controller of condenser magnetic valve break-make, condenser pressure controller one end is connected with exhaust outlet of compressor, the other end is connected with the control end of condenser magnetic valve, control the break-make of condenser magnetic valve, by pressure controller, air inlet electromagnetic valve switch is controlled and blower fan on off control, realizing classification heat exchange area and cooling air quantity supplies with, thereby make system pressure be stable at zone of reasonableness, guarantee that unit normally moves.In the disclosure patent, belonging to the situation of utilizing pressure at expulsion to control blower fan start and stop, there is above-mentioned defect in it equally.
Summary of the invention
For the problem existing in correlation technique, the object of the present invention is to provide a kind of control method of wind-cooled cold-water unit, to improve the efficiency of compressor operating wind-cooled cold-water unit when the sub-load.
For achieving the above object, according to an aspect of the present invention, a kind of control method of wind-cooled cold-water unit is provided, the wind side condenser group that wind-cooled cold-water unit comprises compressor, is communicated with the exhaust outlet of compressor, the refrigerant that each wind side condenser has flowing through wherein from exhaust outlet carries out cooling blower fan, this control method comprises: step 1: after the start of wind-cooled cold-water unit, the pressure at expulsion that judges whether compressor falls into setting pressure scope and wind-cooled cold-water unit continuous operating time reaches setting-up time, if this judgment result is that, be to proceed to step 2; Step 2: opened the operate power sum of blower fan, the actual refrigerating capacity of wind-cooled cold-water unit sues for peace to obtain the first performance number to all in the operate power of compressor, wind side condenser group; And step 3: first determine that the power under the first performance number is interval, and then will open the rotating speed of blower fan according to the unlatching number of all blower fans in the interval definite wind side condenser group of affiliated power and each.
Preferably, in order to the power of comparing with the first performance number is interval, be at least two, when take the unlatching number of all blower fans in wind side condenser group with each rotating speed that will open blower fan during as a set of values, each power interval is corresponding to different set of values.
Preferably, wind side condenser group is 3 wind side condensers, and these 3 wind side condensers are connected in parallel between the refrigerant entrance of evaporimeter in the exhaust outlet of compressor and wind-cooled cold-water unit, and each own two blower fans of each wind side condenser.
Preferably, setting pressure scope is less than or equal to 1350kpa for being more than or equal to 290kpa, setting-up time is 30 minutes, actual refrigerating capacity be chilled water temperature poor with 60 product, wherein chilled water temperature poor for the chilled water of evaporimeter enter and chilled water outlet between chilled water temperature differ from 1; Power interval has 4: be more than or equal to 200kw, be more than or equal to 105kw and be less than 200kw, be more than or equal to 85kw and be less than 105kw, be less than 85kw.
Preferably, step 3 comprises following sub-step: sub-step 1: when the first performance number is more than or equal to 200kw, 6 blower fans in wind side condenser group are all opened, and the rotating speed of each blower fan is at full speed; Sub-step 2: when the first performance number is more than or equal to 105kw and is less than 200kw, any 5 blower fans in wind side condenser group are opened, and the rotating speed of these 5 blower fans is at full speed; Sub-step 3: when the first performance number is more than or equal to 85kw and is less than 105kw, any 4 blower fans in wind side condenser group are opened, and the rotating speed of these 4 blower fans is at full speed; Sub-step 4: when the first performance number is less than 85kw, any 3 blower fans in wind side condenser group are opened, and the rotating speed of these 3 blower fans is Half Speed.
Preferably, if the determination result is NO for step 1, carry out following steps: step 1-1: whether the pressure at expulsion that judges compressor falls into setting pressure scope, as this judgment result is that otherwise proceed to step 1-2, otherwise proceed to step 1-4; Step 1-2: close all blower fans in wind side condenser group when pressure at expulsion is less than the lower limit of setting pressure scope, opens all blower fans in wind side condenser group when pressure at expulsion is greater than the higher limit of setting pressure scope; Step 1-3: in wind side condenser group, all blower fans keep the definite start-stop state of step 1-2, and continue to return to step 1-1 after 60 seconds; Step 1-4: judge whether wind-cooled cold-water unit continuous operating time reaches setting-up time, if this judgment result is that is, proceeds to step 2, otherwise proceed to step 1-5; Step 1-5: open in wind side condenser group all blower fans and keep 60 seconds, then returning to step 1-4.
Preferably, in wind side condenser group, the unlatching of each blower fan must meet following condition: wind-cooled cold-water unit has at least been started shooting 5 minutes, or wind-cooled cold-water unit has at least been shut down 5 minutes.
Preferably, when wind-cooled cold-water unit is started shooting first, at compressor start, within first 1 minute, open the whole blower fans in wind side condenser group; When closing wind-cooled cold-water unit, compressor cuts out latter 30 seconds whole blower fans of cutting out in wind side condenser group.
Preferably, wind-cooled cold-water unit is air-cooling magnetic suspension handpiece Water Chilling Units.
Than described prior art, the present invention is interval according to the power under the first performance number, determine that the unlatching number of all blower fans in wind side condenser group and each will open the rotating speed of blower fan, thereby make fan operation perfect matching in compressor operating and wind side condenser group, the unlatching number and the rotation speed of fan that are blower fan in compressor operating load and wind side condenser group match, so improved the efficiency of compressor operating wind-cooled cold-water unit when sub-load, obtained optimum IPLV; Further preferably, the invention enables the more above-mentioned prior art of efficiency of wind-cooled cold-water unit to improve 10% left and right.
This control method of the present invention has improved the refrigerating capacity of wind-cooled cold-water unit, has reduced the energy consumption of wind-cooled cold-water unit, has improved on the whole the efficiency of wind-cooled cold-water unit, has realized the target of green energy conservation.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of wind-cooled cold-water unit;
Fig. 2 is the flow chart of an embodiment of the control method of wind-cooled cold-water unit of the present invention.
The specific embodiment
The specific embodiment of wind-cooled cold-water unit control method of the present invention is described referring to accompanying drawing below.
The control method of wind-cooled cold-water unit of the present invention, for wind-cooled cold-water unit comprise: compressor, the wind side condenser group being communicated with the exhaust outlet of compressor, and be connected to the evaporimeter between the air entry of compressor and the refrigerant exit of wind side condenser group, the chilled water pipeline that evaporimeter has confession and the refrigerant of flowing through wherein carries out heat exchange, the entrance and exit of chilled water pipeline is chilled water import and the chilled water outlet of evaporimeter.Wind side condenser group at least has two wind side condensers, and each wind side condenser has blower fan, to carry out cooling to the refrigerant of this wind side condenser of flowing through from exhaust outlet of compressor.
The control method of wind-cooled cold-water unit of the present invention, comprise the steps, step 1: after the start of wind-cooled cold-water unit, the pressure at expulsion that judges whether compressor falls into setting pressure scope and wind-cooled cold-water unit continuous operating time reaches setting-up time, if this judgment result is that, be to proceed to step 2; Step 2: opened the operate power sum of blower fan, the actual refrigerating capacity of wind-cooled cold-water unit sues for peace to obtain the first performance number to all in the operate power of compressor, wind side condenser group, that is, " the first performance number "=" compressor operating power "+" all operate power sums of having opened blower fan in wind side condenser group "+" actual refrigerating capacity of wind-cooled cold-water unit "; Step 3: the power under first definite the first performance number is interval, and then to open the rotating speed of blower fan according to all blower fans unlatching numbers in the interval definite wind side condenser group of affiliated power and each.According to above step 1 to step 3, the present invention only relies on the pressure at expulsion of compressor to determine unlatching number and the rotating speed of blower fan, but rely on the pressure at expulsion of compressor, the continuous operating time of wind-cooled cold-water unit and the first performance number of calculating, determine that each of unlatching number of all blower fans in wind side condenser group will be opened the rotating speed of blower fan.Thus, the invention enables unlatching number and the rotation speed of fan of blower fan in compressor operating load and wind side condenser group to match, avoided compressor operating wind-cooled cold-water unit blower fan and compressor operating when the sub-load unmatched problem of loading, thereby the efficiency that has improved compressor operating wind-cooled cold-water unit when sub-load, obtains optimum IPLV.
The following wind-cooled cold-water unit of take is example, it comprises that compressor is one, evaporimeter is one, wind side condenser group is 3 wind side condensers, these 3 wind side condensers are connected in parallel between the refrigerant entrance of evaporimeter in the exhaust outlet of compressor and wind-cooled cold-water unit, and each own two blower fans of each wind side condenser, now wind side condenser group has 6 blower fans; The refrigerant that the compressor of take the is discharged wind side condenser group of first flowing through is flowed through after evaporimeter again and is returned to compressor air suction mouth as duty; Stipulate that described setting pressure scope is less than or equal to 1350kpa for being more than or equal to 290kpa, described setting-up time is 30 minutes.Under above-mentioned all conditions, referring to Fig. 2, an embodiment who specifically describes control method of the present invention is as follows:
First implement above-mentioned step 1, until just carry out successively described step 2 and step 3 while meeting " pressure at expulsion of compressor falls into setting pressure scope and wind-cooled cold-water unit continuous operating time reaches setting-up time ", to determine unlatching number and the rotating speed of 6 blower fans in wind side condenser group according to following table according to the first performance number of calculating
In upper table:
A, the main engine power (can pass through communications protocol (modbus communication) and obtain, also can be referred to as the first performance number) that represents wind-cooled cold-water unit is " compressor operating power "+" all operate power sums of having opened blower fan in wind side condenser group ";
B, represents the actual refrigerating capacity of wind-cooled cold-water unit, the product of and C poor for chilled water temperature, and chilled water temperature is poor is that chilled water import and the chilled water temperature between chilled water outlet of evaporimeter is poor;
H, represents the first performance number;
The unit of above A, B, H, D, E, F is kw, C wherein, and D, E, F can manually arrange change (default value: D=200, E=105, F=85, C=60) under administrator right needs test and field working conditions to debug.
In upper table, in order to the power interval with the first performance number comparison, be 4 intervals, according to above form, obvious described step 3 can comprise 4 sub-steps.Sub-step 1: when the first performance number is more than or equal to 200kw, 6 blower fans in wind side condenser group are all opened, and described in each, the rotating speed of blower fan is at full speed; Sub-step 2: when the first performance number is more than or equal to 105kw and is less than 200kw, any 5 blower fans in wind side condenser group are opened, and the rotating speed of these 5 blower fans is at full speed; Sub-step 3: when the first performance number is more than or equal to 85kw and is less than 105kw, any 4 blower fans in wind side condenser group are opened, and the rotating speed of these 4 blower fans is at full speed; Sub-step 4: when the first performance number is less than 85kw, any 3 blower fans in wind side condenser group are opened, and the rotating speed of these 3 blower fans is Half Speed.
Further, from Fig. 2, also can find out, if " pressure at expulsion of compressor falls into setting pressure scope and wind-cooled cold-water unit continuous operating time reaches setting-up time " is false, step 1 is embodied as following 5 step: step 1-1: whether the pressure at expulsion that judges compressor falls into described setting pressure scope, as this judgment result is that otherwise proceed to step 1-2, otherwise proceed to step 1-4; Step 1-2: all blower fans close wind side condenser group when the pressure at expulsion of compressor is less than the lower limit of setting pressure scope in, when the pressure at expulsion of compressor is greater than the higher limit of setting pressure scope, open wind side condenser group in all blower fans; Step 1-3: in wind side condenser group, all blower fans keep the definite start-stop state of step 1-2, and continue to return to described step 1-1 after 60 seconds; Step 1-4: judge whether wind-cooled cold-water unit continuous operating time reaches described setting-up time, if this judgment result is that is, proceeds to described step 2, otherwise proceed to step 1-5; Step 1-5: open in wind side condenser group all blower fans and keep 60 seconds, then returning to step 1-4.In Fig. 2, continue 300 seconds, refer to all blower fans in wind side condenser group and turn round and continue 300 seconds with fan starting number and the fan speed of selecting.
The present invention is not limited to embodiment described above.For example, although setting power interval is 4 in embodiment, but the present invention is not limited to this, in the present invention, in order to the power interval of comparing with the first performance number, be at least two, when take the unlatching number of all blower fans in wind side condenser group and rotating speed that each will open blower fan during as a set of values, each power interval is corresponding to different set of values; In other words, when the first performance number falls into power when interval, the rotating speed that in wind side condenser group, the unlatching number of all blower fans and each will be opened blower fan is selected the respective value of the interval corresponding value set of fallen into power.Again for example, the present invention for wind-cooled cold-water unit in be not limited to the number of compressor number, evaporimeter number and wind side condenser group apoplexy side condenser, and whether wind side condenser in parallel between evaporimeter and exhaust outlet of compressor each other.Further preferably, the above-mentioned arbitrary control method of the present invention is applicable to air-cooling magnetic suspension handpiece Water Chilling Units.In addition, in the present invention, every wind-cooled cold-water unit that relates to is started shooting corresponding to compressor unlatching, and wind-cooled cold-water compressor emergency shutdown is closed corresponding to compressor.
Also will point out, as optimal way, in the present invention, in wind side condenser group, the unlatching of each blower fan must meet following condition: wind-cooled cold-water unit has at least been started shooting 5 minutes, or wind-cooled cold-water unit has at least been shut down 5 minutes.When wind-cooled cold-water unit is started shooting first, at compressor start, within first 1 minute, open the whole blower fans in wind side condenser group; When closing wind-cooled cold-water unit, compressor cuts out latter 30 seconds whole blower fans of cutting out in wind side condenser group.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a control method for wind-cooled cold-water unit, the wind side condenser group that described wind-cooled cold-water unit comprises compressor, is communicated with the exhaust outlet of described compressor, the refrigerant that each wind side condenser has flowing through wherein from described exhaust outlet carries out cooling blower fan,
It is characterized in that, described control method comprises:
Step 1: after the start of described wind-cooled cold-water unit, the pressure at expulsion that judges whether described compressor falls into setting pressure scope and described wind-cooled cold-water unit continuous operating time reaches setting-up time, is to proceed to step 2 if this judgment result is that;
Step 2: opened the operate power sum of blower fan, the actual refrigerating capacity of described wind-cooled cold-water unit sues for peace to obtain the first performance number to all in the operate power of described compressor, described wind side condenser group; And
Step 3: first determine that the power under described the first performance number is interval, and then will open the rotating speed of blower fan according to the unlatching number of all blower fans in the interval definite described wind side condenser group of affiliated power and each,
If the determination result is NO for described step 1, carry out following steps:
Step 1-1: whether the pressure at expulsion that judges described compressor falls into described setting pressure scope, as this judgment result is that otherwise proceed to step 1-2, otherwise proceeds to step 1-4;
Step 1-2: close all blower fans in described wind side condenser group when described pressure at expulsion is less than the lower limit of described setting pressure scope, opens all blower fans in described wind side condenser group when described pressure at expulsion is greater than the higher limit of described setting pressure scope;
Step 1-3: in described wind side condenser group, all blower fans keep the definite start-stop state of described step 1-2, and continue to return to described step 1-1 after 60 seconds;
Step 1-4: judge whether described wind-cooled cold-water unit continuous operating time reaches described setting-up time, if this judgment result is that is, proceeds to described step 2, otherwise proceeds to step 1-5;
Step 1-5: open in described wind side condenser group all blower fans and keep 60 seconds, then returning to described step 1-4.
2. control method according to claim 1, is characterized in that,
In order to the power of comparing with described the first performance number is interval, be at least two, when take the unlatching number of all blower fans in described wind side condenser group with each rotating speed that will open blower fan during as a set of values, each power interval is corresponding to different set of values.
3. control method according to claim 2, is characterized in that,
Described wind side condenser group is 3 wind side condensers, and these 3 wind side condensers are connected in parallel between the refrigerant entrance of evaporimeter in the exhaust outlet of described compressor and described wind-cooled cold-water unit, and each own two described blower fans of each wind side condenser.
4. control method according to claim 3, is characterized in that,
Described setting pressure scope is less than or equal to 1350kpa for being more than or equal to 290kpa, described setting-up time is 30 minutes, described actual refrigerating capacity be chilled water temperature poor with 60 product, wherein said chilled water temperature is poor is that chilled water import and the chilled water temperature between chilled water outlet of described evaporimeter is poor;
Described power interval has 4: be more than or equal to 200kw, be more than or equal to 105kw and be less than 200kw, be more than or equal to 85kw and be less than 105kw, be less than 85kw.
5. control method according to claim 4, is characterized in that, described step 3 comprises following sub-step:
Sub-step 1: when described the first performance number is more than or equal to 200kw, 6 described blower fans in described wind side condenser group are all opened, and described in each, the rotating speed of blower fan is at full speed;
Sub-step 2: when described the first performance number is more than or equal to 105kw and is less than 200kw, any 5 the described blower fans in described wind side condenser group are opened, and the rotating speed of these 5 blower fans is at full speed;
Sub-step 3: when described the first performance number is more than or equal to 85kw and is less than 105kw, any 4 the described blower fans in described wind side condenser group are opened, and the rotating speed of these 4 blower fans is at full speed;
Sub-step 4: when described the first performance number is less than 85kw, any 3 the described blower fans in described wind side condenser group are opened, and the rotating speed of these 3 blower fans is Half Speed.
6. control method according to claim 5; it is characterized in that; in described wind side condenser group, the unlatching of each blower fan must meet following condition: described wind-cooled cold-water unit has at least been started shooting 5 minutes, or described wind-cooled cold-water unit has at least been shut down 5 minutes.
7. control method according to claim 5, is characterized in that, when described wind-cooled cold-water unit is started shooting first, at described compressor start, within first 1 minute, opens the whole blower fans in described wind side condenser group; When closing described wind-cooled cold-water unit, described compressor cuts out whole blower fans of cutting out for latter 30 seconds in described wind side condenser group.
8. according to the control method described in any one in claim 1-5, it is characterized in that, described wind-cooled cold-water unit is air-cooling magnetic suspension handpiece Water Chilling Units.
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| CN201210069516.2A CN102628630B (en) | 2012-03-15 | 2012-03-15 | Control method of air-cooling water chiller unit |
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| CN103925755B (en) * | 2013-01-16 | 2016-06-08 | 珠海格力电器股份有限公司 | Operation control method for condensation side fan unit of refrigerating system |
| CN104896626A (en) * | 2014-03-07 | 2015-09-09 | 珠海格力电器股份有限公司 | Refrigeration control method and device for air-cooled water chilling unit and unit system |
| CN110285615B (en) * | 2014-06-03 | 2021-07-20 | 特灵国际有限公司 | System and method for controlling a cooling system |
| CN104807139A (en) * | 2015-04-24 | 2015-07-29 | 广东美的制冷设备有限公司 | Control method of air conditioner and control device |
| CN105571027B (en) * | 2016-01-19 | 2018-12-25 | 珠海格力电器股份有限公司 | Water chilling unit and control method thereof |
| CN109855338B (en) * | 2019-02-15 | 2021-05-25 | 青岛海尔空调电子有限公司 | Air-cooled magnetic suspension centrifugal unit and shutdown control method thereof |
| CN110006139B (en) * | 2019-03-04 | 2021-12-28 | 青岛海尔空调电子有限公司 | Control method for air-cooled magnetic suspension unit |
| CN110440406B (en) * | 2019-08-05 | 2020-12-11 | 珠海格力电器股份有限公司 | Fan control method, device and unit equipment |
| CN115468273A (en) * | 2022-11-14 | 2022-12-13 | 蘑菇物联技术（深圳）有限公司 | Method of controlling air conditioning system, computing device, and computer-readable storage medium |
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| JP3668121B2 (en) * | 2000-11-02 | 2005-07-06 | 三洋電機株式会社 | Speed adjusting device for condenser blower |
| CN1451920A (en) * | 2003-04-24 | 2003-10-29 | 上海交通大学 | Air-cooled cooling set condenser fan air flow controlling method |
| JP4745202B2 (en) * | 2006-11-17 | 2011-08-10 | 株式会社小松製作所 | Cooling fan drive control device |
| CN102003822B (en) * | 2010-12-15 | 2013-07-17 | 广州恒星冷冻机械制造有限公司 | Air-cooling cold water unit and control method thereof |
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