CN103216983B - Cooling system - Google Patents
Cooling system Download PDFInfo
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- CN103216983B CN103216983B CN201310026364.2A CN201310026364A CN103216983B CN 103216983 B CN103216983 B CN 103216983B CN 201310026364 A CN201310026364 A CN 201310026364A CN 103216983 B CN103216983 B CN 103216983B
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Abstract
The present invention obtains a kind of cooling system, can prevent the temperature in each cold store from rising while carry out electrical management as far as possible.Possess: cooling device, form refrigerant loop by off-premises station (2) and indoor set (1); Amount of power measurement mechanism (4), measures the amount of power that cooling device consumes; And controller (3), according to the electric power value that amount of power measurement mechanism (4) is measured, the periodically running of controlled cooling model device.
Description
Technical field
The present invention relates to cooling system.Relevant control is cut down in particular to electric power.
Background technology
In the past, as the method that the amount of power in freezing/refrigerating (storehouse), air-conditioning equipment etc. is cut down, generally possess system as following and carried out.Such as, when possessing the air-conditioning system of multiple off-premises station, possesses demand (demand) controller (centralized management device), when current revolution electric current exceedes electric current (target current) as target, individually adjust the ability of each air-conditioning equipment, and carry out controlling to make the electric current flowing through entire system become below target current.Specifically, propose and individually control the operating frequency of compressor to reduce the means (for example, referring to patent document 1,2) of current value for each machine.
[patent document 1] Japanese Unexamined Patent Publication 10-339529 publication
[patent document 2] Japanese Unexamined Patent Publication 2007-212038 publication
Summary of the invention
In air attemperation apparatus, as above-mentioned patent document, when current value, amount of power exceed Limited Current value, amount of power, reduce the operating frequency of compressor and reduce amount of power.By reducing operating frequency, reduce with air adjustment and relevant ability.Therefore, the temperature of air-conditioning object space likely changes, the comfortableness loss of the people in air-conditioning object space.But, when air attemperation apparatus, if sacrifice the comfortableness of people, then can amount of power limits value be observed.
On the other hand, the air adjustment in the warehouse carrying out carrying out food, medicine, senior article etc. keeping etc. and, if the temperature in such as warehouse changes, then the quality of keeping thing is impacted.When the cold store etc. particularly used in freezing purposes (refrigeration warehouse storehouse temperature is set to less than-25 DEG C), if in order to the operating frequency limiting amount of power and limit compression machine, then exist frozen food, ice cream etc. keeping thing melt and cannot using the possibility of content as merchandise sales.
In addition, such as, in air adjustment and system, judge there is nobody in air-conditioning object space, preferentially the air attemperation apparatus in the space of nobody is carried out to the frequency restriction etc. of running stopping, compressor, amount of power, current value can be reduced thus.On the other hand, when the cold store of keeping foodstuff etc., in its most cold store, keeping has the situation of food etc. more.Such as, although how much have the deviation of keeping thing according to time-bands, week etc., exist and do not take care of thing completely and the possibility in the warehouse of the frequency restriction of stopping of can preferentially carrying out operating, compressor is few.This is because, even if when the amount of keeping thing is few, if do not continue cooling, then the deterioration of keeping thing can be caused.
Such as, when the senior fresh fish that tuna is such, the keeping under about-50 DEG C is applicable, if temperature rises, quality can occur and reduce.For the cold store of such purposes, due to temperature cannot be made to rise, so the priority in controlling preferably is set to finally.In contrast, when the vegetables such as cucumber, eggplant, owing to there is amplitude as+7 ~+10 DEG C in storage humidity, so can be set to energy-conservation as becoming+10 DEG C when power consumption priority status.
In addition, be particularly provided with multiple warehouse being called as the cold store of commercial warehouse recently and become many.In commercial warehouse, a compartment is that the compartment about 10 ~ 100 level grounds has about 10 ~ 50, sometimes also hires out each compartment.Therefore, according to the owner of season, taxi, keeping thing is often different.Such as; not only for the situation of the temperature in management 1 cold store; and for managing the commercial warehouse of a large amount of compartments, no matter from the viewpoint of environmental protection or from cost-effective viewpoint, it is important that the stable keeping of keeping thing reduces amount of power simultaneously.Therefore, the control that simultaneously can realize the quality maintenance of keeping thing and the reduction of power consumption amount is needed.
Therefore, the object of the invention is to obtain a kind of can prevent the temperature cooled in object space from rising as far as possible while carry out the cooling system of electrical management.
The present invention completes to solve above-mentioned problem, possesses: cooling device, the refrigerant loop that compressor, condenser, throttling arrangement and cooler connect with pipe arrangement by formation successively; Amount of power measurement mechanism, measures the amount of power that cooling device consumes; And control device, according to the electric power value measured of amount of power measurement mechanism, the periodically running of controlled cooling model device.
In cooling system of the present invention, according to electric power value, the periodically running of controlled cooling model device, adjusts amount of power and storehouse temperature well so can balance.Particularly, such as, if be adjusted to more than the critical temperature do not become in its keeping thing for storehouse temperature, then the quality can seeking keeping thing is guaranteed.Such as, when keeping thing is food etc., the abandonment loss etc. of failing when guaranteeing food quality because temperature rises can be avoided.
Accompanying drawing explanation
Fig. 1 is the figure of the Equipments Setting example of the cooling system illustrated in the cold store in embodiments of the present invention 1.
Fig. 2 is the figure of the structure of the cooling device that embodiments of the present invention 1 are shown.
Fig. 3 is the figure that amount of power in embodiments of the present invention 1 and the relation of time are shown.
Fig. 4 is the figure that storehouse temperature in embodiments of the present invention 1 and the relation of time are shown.
Fig. 5 is the figure of the handling process of the controller 3 illustrated in the cooling system of embodiments of the present invention 1.
Fig. 6 is the figure of the control sequence example that embodiments of the present invention 2 are described.
Fig. 7 illustrates the figure of the cooling device of embodiments of the present invention 3 to the setting example of cold store.
Fig. 8 is the figure of the Equipments Setting example of the cooling system illustrated in the cold store in embodiments of the present invention 6.
Fig. 9 is the figure of the relation that amount of power in embodiments of the present invention 6 and control are shown.
Figure 10 be illustrate in embodiments of the present invention 6 with the figure of the relevant display frame such as setting.
Figure 11 is the figure of the relation that amount of power and the time process used in the cooling in the cold store of embodiments of the present invention 7 is shown.
(symbol description)
1: indoor set; 2: off-premises station; 3: controller; 3A: setting process unit; 4: amount of power measurement mechanism; 5: temperature sensor; 6: annunciator; 7: setting input device; 8: display unit; 10: compressor; 20: condenser; 30: expansion valve; 40: cooler; 50: magnetic valve.
Detailed description of the invention
Embodiment 1.
Fig. 1 is the figure of the Equipments Setting example of the cooling system illustrated in the cold store in embodiments of the present invention 1.Herein, in FIG, freezing/refrigerating warehouse (hereinafter referred to as cold store) is set to Room 3, but compartment number is not limited thereto, the situation of more than such as 2 compartments can be applied to.In addition, be set to the structure that an off-premises station (condensation unit) 2 and indoor set (unit cooler) 1 are respectively set for each compartment, but also such as can configure off-premises station 2 and the indoor set 1 of more than 1 for a compartment.
Fig. 2 is the figure of the structure of the cooling device that embodiments of the present invention 1 are shown.In the present embodiment, such as connect with refrigerant piping compressor 10, condenser 20, magnetic valve 50, expansion valve 30 and the cooler 40 that off-premises station 2 and indoor set 1 have successively, constitute refrigerant loop (refrigerant circulation loop).In addition, as cold-producing medium, freon refrigerant (R404A, R410A etc.), natural refrigerant (CO
2, NH
3deng) etc. circulate in refrigerant loop.Herein, as shown in Figure 2, suppose that the off-premises station 2 be such as arranged at outside cold store has compressor 10, condenser 20 and magnetic valve 50.In addition, suppose that the indoor set 1 be arranged in cold storage warehouse has expansion valve 30 and cooler 40.
Cold-producing medium sucks and compresses by the compressor 10 shown in Fig. 2, becomes the state of high temp/high pressure and spues.Herein, about compressor 10, such as the preferred compressor by controlling to adjust the type of the discharge-amount of cold-producing medium by the rotating speed of inverter circuit etc. is formed.Condenser 20 is air (outer gas) outside cold store and carries out heat exchange between cold-producing medium and make the heat exchanger that refrigerant condenses liquefies.
In addition, the magnetic valve 50 as opening and closing device is with the valve avoiding cold-producing medium to circulate in refrigerant loop for closed stream.Particularly, in the present embodiment, be make the pressure of the suction side of compressor 10 reduce and make by the work of low pressure switch the parts that compressor 10 stops by making the flowing of cold-producing medium stop.Expansion valve 30 as throttling arrangement is the parts reducing pressure to cold-producing medium and make it expand.About expansion valve 30, such as, be made up of thermal expansion valve, electronic expansion valve etc.
Cooler 40 as evaporimeter is the heat exchangers of the cold-producing medium evaporation gasification making to have been liquefied by heat exchange.By the heat exchange in cooler 40, the air in the cold store as cooling object space is cooled.Thus, freezing, the refrigeration of the cooling object etc. in cooling object space etc. is such as housed in.
The amount of power that the cooling device (off-premises station 2 and indoor set 1) that each cold store measured by amount of power measurement mechanism 4 consumes, is sent to controller 3 by the signal relevant with measurement.In addition, in order to measure the temperature of each cold store, in each cold store, temperature sensor 5 is configured with.The signal detected is sent to controller 3 by each temperature sensor 5.
Controller 3 controls each cooling device.In the present embodiment, particularly according to the amount of power that amount of power measurement mechanism 4 is measured, interim control (demand modeling) is individually carried out to multiple cooling device, is no more than regulation amount of power to make the peak value of amount of power.Herein, between controller 3 and each cooling device (off-premises station 2 and indoor set 1), in order to carry out and control relevant communication, such as, by connections such as conveyer lines.Such as, the annunciator 6 such as display unit, the dynamic device of ring is the device for reporting user etc. according to the instruction of controller 3.Particularly, in the present embodiment, if even if situation is not finally also improved when controller 3 is judged as controlling, then make annunciator 6 report this meaning.
Fig. 3 is the figure of the relation that amount of power and the time process used in the cooling in cold store is shown.According to the setting electric power value 1 ~ 4 in these 4 stages of setting 1 ~ 4, the control carrying out controlling performs scope and determines.The control of cooling device from usually controlling to change to demand modeling, being carried out interim control and suppressing the rising of amount of power by controller 3.Herein, in the present embodiment, the setting number controlling power value being set to 4(control execution scope was 5 stages), but do not limit setting number.In addition, such as, also can according to the environment using cold store, (setting place) can Variation control power value at the scene.In addition, in figure 3, and control the setting that controls accordingly of power value, but the setting can also selecting not carry out controlling to change in each setting (such as, implement setting 1, setting 3 but unreal arranging determines 2).
Fig. 4 is the figure of the relation of the temperature and time process that cold store is shown.In common cold store, defining the target temperature of cold store, when becoming this temperature, the running of off-premises station/indoor set being stopped.Afterwards, storehouse temperature start rise, when reach certain can operating temperature (ON value) time, the running of off-premises station/indoor set is restarted and carry out cooling operate.By this repeatedly, the temperature in cold store is roughly controlled as between ON value and OFF value.When refrigerating plant of the present invention, can also set boundary value except ON value, OFF value, ON value, OFF value, boundary value can be set by controller.Setting can also be carried out according to the environment for use at scene to change.In addition, can not also boundary value be set, in any case all should preferentially cool in the compartment of running, can cut down the object controlled from amount of power and remove.In addition, as cold-producing medium, also HFC cold-producing medium and R32 can be used.
Fig. 5 is the figure of the handling process of the controller 3 illustrated in the cooling system of embodiments of the present invention 1.According to Fig. 5, illustrate that the amount of power of the controller 3 in present embodiment suppresses process.
Judge amount of power that amount of power measurement mechanism 4 measures whether lower than the amount of power (S0-1) of the setting 1 shown in Fig. 3.If be judged as the amount of power lower than setting 1, then usually control (S0-2).During being judged as the amount of power lower than setting 1, repeatedly above process.
In S0-1, if be judged as that the amount of power that amount of power measurement mechanism 4 is measured is more than the amount of power of setting 1, then judge whether to be in more than the amount of power of setting 1 and in scope lower than the amount of power of setting 2 (S1-1).If be judged as more than the amount of power of setting 1 and lower than the amount of power of setting 2, then carry out treatment S 1-2.According to the detecting temperature value that temperature sensor 5 detects, in each cold store, judge the cooling device (S1-2(1) being no more than the ceiling temperature value of defined).Herein, controller 3 is set to for being judged as that the cooling device exceeding ceiling temperature value controls usually (also identical in following judgement, control).Then, in the cooling device be no more than, judge the cooling device (S1-2(2) of the control do not carried out based on control 1).Be calculated as with the difference of not carrying out detecting temperature value and the ceiling temperature value detected based on the temperature sensor 5 that the cooling device of the control of control 1 is corresponding surplus (degree that the permissible range to ceiling temperature value is wide) (S1-2(3)).Then, for the cooling device that surplus is high, carry out the control (S1-2(4) based on control 1), return S0-1.
Herein, the control (upper limiting frequency restriction controls) that 1 is the upper limit of the operating frequency of the compressor 10 limited in off-premises station 2 is controlled.Such as, the upper limiting frequency of the compressor 10 driven with the operating frequency of about 20Hz ~ 100Hz time usual is restricted to does not become more than 80Hz.
In common cold store, what ability has to a certain degree is more than needed.When improving the operating frequency of compressor 10 be such as following such time.
(1) when in the moving into etc. of keeping thing, load increases temporarily.
Because load increases, storehouse temperature rises, and rises and be reduced to the temperature of regulation to suppress this temperature, improves operating frequency.When limiting the upper limit of operating frequency, compared with the situation of not carrying out limiting, what temperature reduced slows, but usually has more than needed in ability, so can be reduced to the temperature of regulation.
(2) when being reduced to the temperature of regulation after defrosting terminates.
Usually, in order to make the frost be attached on cooler (heat exchanger) 40 melt, periodically defrost.Such as make the temperature of heat exchanger self increase to defrost by heating the heater being arranged on heat exchanger.Generally, in defrost process, make cooling operate stop, so the temperature of cold store inside rises.In order to make the temperature in storehouse be reduced to the temperature of regulation after defrosting terminates, usually, improving the operating frequency of compressor 10, shortening the time being reduced to the temperature of regulation.
Such as, when above-mentioned (1), when the upper of restriction operating frequency is prescribed a time limit, if cooling capacity has more than needed relatively, although then cooling velocity becomes slow, storehouse temperature can be made to reduce.But in the situation of the cold store of not having more than needed in relative cooling capacity (situation that the ability of load is stronger), storehouse temperature rises gradually.Herein, in the cooling device that the cold store having exceeded ceiling temperature value to storehouse temperature cools, such as usually control, and by making upper limiting frequency limits value improve or lifting restrictions and carry out suppressing the control of storehouse temperature rising (being also same when carrying out the control based on following control 2, control 3, control 4).
In addition, sometimes in cooling device, defrost control is carried out.Defrost control refers to, for removing the control of the frost on the cooler (indoor heat converter) that is such as attached to indoor set 1 and has.When having carried out such defrost control, the certain period after completing for defrost control, the restriction of the upper limiting frequency based on control 1 can exempted in this cooling device has controlled.
In addition, when above-mentioned (2), after defrosting terminates, must cool from the high state of storehouse temperature.When limiting the upper limit of operating frequency of compressor 10, although slowing of reducing of temperature, can spended time and make temperature be reduced to the temperature of regulation.If sacrifice temperature reducing rate, then can suppress the peak value of amount of power.But, slow significantly in the reduction of storehouse temperature, when likely causing the quality of keeping thing to reduce, if even such as according to amount of power, carry out the state that control 1 is such, about the cooling device carrying out defrost control, certain period after defrost control is completed, also control 1 can not be carried out.
Limit the upper limit of operating frequency by carrying out control 1, thus blanketing frequency can become larger, amount of power becomes larger phenomenon.Therefore, can not only realize energy-conservation, but also can suppress for as below the restriction amount of power of target.In addition, the abandonment loss etc. of failing when guaranteeing food quality because temperature rises can be avoided.
Next, in S1-1, if be judged as that amount of power that amount of power measurement mechanism 4 is measured is not in more than the amount of power of setting 1 and in scope lower than the amount of power of setting 2, then judge whether to be in more than the amount of power of setting 2 and in scope lower than the amount of power of setting 3 (S2-1).If be judged as more than the amount of power of setting 2 and lower than the amount of power of setting 3, then carry out treatment S 2-2.According to the detecting temperature value that temperature sensor 5 detects, in each cold store, judge the cooling device (S2-2(1) being no more than the ceiling temperature value of defined).Then, among the cooling device be no more than, judge the cooling device (S2-2(2) of the control do not carried out based on control 2).Surplus (S2-2(3) is calculated as) by with the difference of not carrying out detecting temperature value and the ceiling temperature value detected based on the temperature sensor 5 that the cooling device of the control of control 2 is corresponding.Then, for the cooling device that surplus is high, carry out the control (S2-2(4) based on control 2), turn back to S0-1.
Controlling 2 is set higher than common situation by the target evaporating temperature in cooler 40 (being set to rising) and carry out the control (evaporating temperature control) of the running of compressor 10.Target evaporating temperature determines the operating frequency of compressor 10.Such as, usually, according to the difference of target evaporating temperature with actual evaporating temperature, the operating frequency of compressor 10 is determined.When the evaporating temperature relative target evaporating temperature of reality is high, be judged as that needs make cooling accelerate, and control as making the operating frequency of compressor 10 rise.On the contrary, when the evaporating temperature of reality is close to target evaporating temperature, is judged as that cooling is carried out fully, the operating frequency of compressor 10 can be reduced.
When carrying out the cooling in cold store, relative to the design temperature in the storehouse of cold store, target evaporating temperature is set as the situation of the temperature of low 10K ~ 20K is more.Pay attention in the object of cooling special, the situation increasing this temperature difference is more.This is because, if particularly before the temperature controller (thermo) being positioned at cold store is cut-off (due to become regulation temperature below and temperature controller that cooling is stopped) the running stopping of compressor 10, then cannot make the temperature being reduced to regulation in cold store.Therefore, also usually arrange more than needed to the setting value of target evaporating temperature.A small amount of by this surplus being cut down, the peak value that can control as power consumption amount is no more than requirements.According to circumstances the different also temperature controller that can occur in storehouse be cut off before the phenomenon that stops of the running of compressor, but when employing a large amount of electric power to be cooled to the storehouse temperature of regulation a little later, even if forcibly make the running of compressor 10 stop, also few on the impact of keeping thing, so effectively amount of power can be suppressed.
If carry out the control based on control 2, then target evaporating temperature setting value is set higher.If make target evaporating temperature rise, then such as in the indeclinable situation of the evaporating temperature of reality, actual evaporating temperature and the difference of target evaporating temperature diminish.If temperature difference diminishes, then to reduce the direction controlling compressor 10 of operating frequency.Although sufficiently cooled in cold store, because target evaporating temperature is low, so compressor 10 consumes a large amount of electric power with high-frequency running.
Make target evaporating temperature increase by carrying out control 2, thus the rising of the operating frequency of compressor 10 can be avoided, suppress electric power quantitative change large.Therefore, can not only realize energy-conservation, but also can suppress for as below the restriction amount of power of target.In addition, the abandonment loss etc. of failing when guaranteeing food quality because temperature rises can be avoided.
And then, in S2-1, if be judged as that amount of power that amount of power measurement mechanism 4 is measured is not in more than the amount of power of setting 2 and in scope lower than the amount of power of setting 3, then judge whether to be in more than the amount of power of setting 3 and in scope lower than the amount of power of setting 4 (S3-1).If be judged as more than the amount of power of setting 3 and lower than the amount of power of setting 4, then carry out treatment S 3-2.According to the detecting temperature value that temperature sensor 5 detects, in each cold store, judge the cooling device (S3-2(1) being no more than the ceiling temperature value of defined).Then, among the cooling device be no more than, judge the cooling device (S3-2(2) of the control do not carried out based on control 3).Surplus (S3-2(3) is calculated as) by with the difference of not carrying out detecting temperature value and the ceiling temperature value detected based on the temperature sensor 5 that the cooling device of the control of control 3 is corresponding.Then, for the cooling device that surplus is high, carry out the control (S3-2(4) based on control 3), turn back to S0-1.
Herein, controlling 3 is set higher than common situation by the storehouse internal object temperature of cold store the control (storehouse temperature control) of (being set to rising).By setting higher by the target temperature in cold store, the ability supply for reaching storehouse internal object temperature can be carried out at short notice, so shorten the duration of runs of off-premises station 2.Such as, figure 4 illustrates the relation of storehouse temperature and time, by desired value (OFF value) is set as than usually high temperature value, thus in cooling device the most equipment of power consumption and shortening the duration of runs of compressor 10.
As mentioned above, such as, when keeping things such as vegetables, storage humidity there is amplitude.By storehouse internal object temperature is changed to the upper limit becoming storage humidity, power consumption amount can be suppressed.
In addition, can control objectives storehouse temperature and target evaporating temperature in linkage according to refrigerating plant difference.By setting higher by target storehouse temperature, target evaporating temperature also can set higher in linkage.By setting higher by target evaporating temperature, in the same manner as the situation of above-mentioned setting 2, the rising of the operating frequency of compressor 10 can be suppressed, reducing amount of power.
By carrying out control 3, storehouse internal object temperature is set higher than common situation, thus the duration of runs (extending running dwell time) of the compressor 10 of most power consumption can be shortened in cooling device.By extending the running dwell time of compressor 10, electric power can be suppressed to become large.Therefore, can not only realize energy-conservation, but also can suppress for as below the restriction amount of power of target.In addition, the abandonment loss etc. of failing when guaranteeing food quality because temperature rises can be avoided.
And then, in S3-1, if be judged as that amount of power that amount of power measurement mechanism 4 is measured is not in more than the amount of power of setting 3 and in scope lower than the amount of power of setting 4, then determines whether more than the amount of power of setting 4 (S4-1).If be judged as be not setting 4 amount of power more than, then turn back to S0-1.
On the other hand, set more than the amount of power of 4 if the judgment is Yes, then carry out treatment S 4-2.According to the detecting temperature value that temperature sensor 5 detects, in each cold store, judge the cooling device (S4-2(1) being no more than the ceiling temperature value of defined).Then, among the cooling device be no more than, judge the cooling device (S4-2(2) of the control do not carried out based on control 4).Surplus (S4-2(3) is calculated as) by with the difference of not carrying out detecting temperature value and the ceiling temperature value detected based on the temperature sensor 5 that the cooling device of the control of control 4 is corresponding.Then, for the cooling device that surplus is high, carry out the control (S4-2(4) based on control 4).In addition, judge whether the time being in more than the amount of power of setting 4 have passed through the stipulated time (S4-3).If be judged as without the stipulated time, then turning back to S0-1.If be judged as that the time be in more than the amount of power of setting 4 have passed through the stipulated time, improve even if be then considered as carrying out also not reaching situation based on the control as last setting 4, make annunciator 6 carry out warning and export (S4-4).
Herein, in control 4, carry out the control (stopping controlling) of magnetic valve 50 obturation made on the liquid pipe of cooling device.If make magnetic valve 50 inaccessible, then the flowing of the cold-producing medium in refrigerant loop is stoped by magnetic valve 50, can not flow to the front of magnetic valve 50.Therefore, cold-producing medium cannot flow to the suction side of compressor 10, and the pressure of the cold-producing medium of the suction side of compressor 10 reduces.If the pressure of suction side is reduced to below authorized pressure, then not shown low pressure switch and compressor 10 is stopped., by magnetic valve 50, compressor 10 is stopped herein, but such as also can directly indicate compressor 10 and make it stop.
Stopped by the equipment and compressor 10 that making in cooling device most power consumption, thus electric power can be suppressed to become large.Therefore, can not only realize energy-conservation, but also can suppress for as below the restriction amount of power of target.
But if compressor dwell time is elongated, then the temperature in cold store rises, and moves closer to ceiling temperature value.If exceed ceiling temperature value, then likely the quality of keeping thing is made a very bad impression, if so be judged as the temperature value becoming set point of temperature lower than ceiling temperature, then carry out the control making magnetic valve 50 open, cooling is operated and restarts.In addition, if carry out stopping being judged as when controlling that the situation that amount of power is not less than setting 4 continue for the stipulated time more than (S16) to 1, then and then for surplus time high cooling device control 4 is carried out.
Herein, as mentioned above, if storehouse temperature becomes close to ceiling temperature, then make magnetic valve 50 open and running is restarted, if but restart, cannot amount of power be reduced.Therefore, at this moment among operating cooling device, the cooling device of the highest cold store of the surplus of storehouse temperature relative upper limit temperature value is stopped again.
By repetitive control 4, the mode that temperature (ceiling temperature) temperature below that must be able to keep to maintain each cold store becomes below restriction amount of power controls amount of power.In addition, the abandonment loss etc. of failing when guaranteeing food quality because temperature rises can be avoided.
As described above, cooling system according to the present embodiment, in each cooling device (each cold store), controls the control of amount of power by implementation phase property, thus amount of power can not be cut down more than necessity, can avoid the significantly rising of storehouse temperature.In addition, the abandonment loss etc. of failing when guaranteeing food quality because temperature rises can be avoided.Compared to control in the past, the rising of storehouse temperature can be avoided further, the quality of the keeping thing in storehouse can be guaranteed.The temperature reference respective according to each cooling device (each cold store) carries out the control reducing amount of power, so can carry out the control corresponding with the keeping thing of the cooling object as each cooling device.
Embodiment 2.
Fig. 6 is the figure of the control sequence example that embodiments of the present invention 2 are described.In above-mentioned embodiment 1, when amount of power has exceeded amount of power setting value, in each cold store (cooling device), calculate surplus, controlled according to surplus order from high to low.Herein, illustrative examples is as based on the preferential control sequence of the refrigeration pre-established.Herein, in the present embodiment, be set to and carry out the control relevant with 7 cooling devices (cold stores of Room 7) and be described.In addition, in figure 6, about the numbering that refrigeration is preferential, suppose that numbering is larger, the degree of admission that temperature rises is higher, and refrigeration is preferentially lower.
In figure 6 (a), carry out the restriction of control 1(upper limiting frequency from refrigeration preferential 7 and control), when also cannot suppress the peak value of amount of power in the cold store 7 of refrigeration preferential 1, carry out control 2(evaporating temperature from refrigeration preferential 7 and control).The order of this process according to control 2,3,4 is carried out.In Fig. 6 (b), for cold store 7, the demand of being set to is forbidden, no matter how and the requirement carrying out amount of power suppression does not carry out the such setting of control 1 ~ 4.As the article that the demand of being set as is forbidden, such as, there are the article that tuna (fish and shellfish), medical supplies etc. need precision temperature to manage.And then, in Fig. 6 (c), in refrigeration preferential 1, be set to and do not carry out control 3 and control 4.
In Fig. 6 (d), as mentioned above, the control of demand modeling is carried out skipping in the certain hour after defrosting terminates.Such as, needs are had to be the article of time short as far as possible by the temperature rising suppression after defrosting according to taking care of thing difference.Such as, if the article that ice cream is such, if temperature rises, then quality is caused to reduce, so preferably shorten ramp-up time as far as possible.In the cooling device of cold store with such keeping thing, in usually operating, carry out above-mentioned control 1 ~ 4, but skip demand modeling in the certain hour after terminating that defrosts.For skip also can individually select and temperature reducing rate after defrosting slow compartment also out of question when, also can not carry out this and skip setting and control.
Embodiment 3.
Fig. 7 illustrates the figure of the cooling device of embodiments of the present invention 3 to the setting example of cold store.In above-mentioned embodiment 1, constitute cooling device by off-premises station 2 and each one of indoor set 1, and 1 group of cooling device is arranged at cold store.But, also consider setting example as shown in Figure 7 in addition.Wherein, when by multiple cooling device (multiple off-premises station 2) to when cooling in 1 cold store, can set in each cooling device that refrigeration is preferential, demand is forbidden, skipped.
Such as, when off-premises station 2 and indoor set 1 are the compartments of 1:1 × n group, according to cooling device (1), (2), (3) ... order implement control pattern be standard, such as cooling device (2) also can select demand to forbid as described above.In addition, individually can set and carry out following control: cooling device (2) demand of being set to be forbidden, cooling device (n) is set to and skips.
Herein, when arranging multiple stage cooling device to identical cold store, owing to being substantially set as identical by the storehouse temperature temperature controller value of all devices, although so control as described above can be implemented, preferably carry out the control as compartment.
Embodiment 4.
Such as, when commercial warehouse, as mentioned above, different according to season, client and the article taken care of change.Now, such as, when allowing that the article of a little variations in temperature are replaced by the strict keeping thing of temperature treatment before this, the control method of switching demand is needed.When having carried out demand enforcement when forgetting switching, if exceed the temperature as target, then can there is very large infringement to keeping thing.
Therefore, when resetting the temperature as target of cold store, carry out from the control having the state of demand modeling automatically to change to the state that demand modeling is forbidden (original state being set to demand forbid).Such as, when keeping thing there occurs change, to become the mode of the keeping optimum temperature of keeping thing as a rule, the setting value of storehouse temperature is changed.Now, by changing to demand illegal state when changing setting value, even if thus when just in case forget and change to and be also set to demand when keeping requirements set corresponding to thing and forbid, thus think and can not impact keeping thing.
Embodiment 5.
In above-mentioned embodiment 1 grade, setup control 1 ~ control 4, periodically controls, but the content controlled is not limited to control 1 ~ control 4.Such as, in control 1, carry out the upper limiting frequency restriction limited the upper limiting frequency that compressor 10 presets and controlled.Such as, the control (ongoing frequency limits and controls) limiting the operating frequency relevant with the current running of compressor 10 can also be carried out.
Such as, when compressor 10 operates with the operating frequency of 100Hz, controlling by carrying out ongoing frequency restriction, making to operate with the operating frequency of 50Hz.By making it possible at random set limiting content, thus the balance of the temperature of cold store and the suppression of amount of power can be obtained.
Embodiment 6.
Fig. 8 is the figure of the Equipments Setting example of the cooling system illustrated in the cold store in embodiments of the present invention 6.In the cooling system of present embodiment, amount of power measurement mechanism 4 is installed to each cooling device, measures the amount of power that each cooling device (off-premises station 2 and indoor set 1) consumes respectively, the signal relevant with measurement is sent to controller 3.By there is amount of power measurement mechanism 4 in each cooling device, about the control illustrated in the above-described embodiment, also can independently control.
Fig. 9 is the figure of the relation that amount of power in embodiments of the present invention 6 and control are shown.Such as, in embodiment 1, each cooling device carries out control 1 ~ control 4 successively.In addition, in embodiment 3, in cooling device, that can carry out controlling skips, the setting such as to forbid.In the controller 3 of present embodiment, as shown in Figure 8, there is setting process unit 3A, such as, be set to and for each cooling device setup control order etc., can carry out the process for various setting.
In addition, as shown in Figure 8, there is the setting input device 7 inputting various setting to controller 3 for user and the display unit 8 shown according to the signal carrying out self-controller 3.Herein, display unit 8 also can be identical with the display unit used in the annunciator 6 of embodiment 1.
Figure 10 be illustrate in embodiments of the present invention 6 with the figure of the relevant display frame such as setting.Such as, user, according to the picture of display in display unit 8, via setting input device 7, carries out the setting relevant with the control that controller 3 performs.Such as, Figure 10 (a) illustrate for carry out as control object device, control content, ceiling temperature, the setting in control time display frame.Herein, the control time refers to, such as, in above-mentioned embodiment 1, till amount of power is lower than setting 2, carries out control 2, but this control is carried out with the time at this.Can for each cooling device, each control, at random setting control time.In addition, Figure 10 (b) illustrates as the explanation of embodiment 3 for the execution carrying out demand modeling, the display frame of setting forbidden.Figure 10 (c) illustrates the display frame represented with the state controlling relevant device etc.
Herein, about the item that such as user can set via setting input device 7, be not limited to the item shown in Figure 10 (a) etc.Such as, about the control that controller 3 carries out, also can carry out and the control cycle (control interval) controlling relevant judgement for each control, the setting of each device.Such as, when temperature treatment being set to loose keeping thing, can control cycle be set longer, when temperature treatment being set to strict keeping thing, can set shorter by control cycle, the quality can seeking keeping thing keeps the balance with process.
Embodiment 7.
Figure 11 is the figure of the relation that amount of power and the time process used in the cooling in the cold store of embodiments of the present invention 7 is shown.In above-mentioned embodiment 1 grade, the amount of power that controller 3 is measured according to amount of power measurement mechanism 4, judges which type of carries out controls.In the present embodiment, the amount of power that controller 3 is measured according to amount of power measurement mechanism 4, the prediction amount of power after the computational rules time (such as 30 minutes etc.).Then, also can judge which prediction amount of power is contained in and controls within the scope of execution and control.By judging according to prediction amount of power, first can dispose for the amount of power that there is the possibility risen.
Such as, in Figure 11 (a), the amount of power at the current point in time place that amount of power measurement mechanism 4 is measured is within the scope of the control execution of control usually, but the prediction amount of power after 30 minutes is within the scope of the control execution of control 1, so controller 3 is set to carry out control 1.In addition, in Figure 11 (b), the amount of power at current point in time place is within the scope of the control execution of control usually, but the prediction amount of power after 30 minutes is within the scope of the control execution of control 2, so controller 3 is set to carry out control 2.
Embodiment 8.
In the above-described embodiment, can carry out for each cooling device and control relevant setting, but owing to such as whether can control etc. for each control setting, so also can to indoor set 1, off-premises station 2(FU) carry out and control relevant setting.
In addition, such as, for cooling device (indoor set 1, off-premises station 2), when not carrying out communicating with controller 3 because broken string waits and demand modeling cannot be carried out, each cooling device can be made to carry out usually controlling.Except usually controlling, also can be prespecified control.
In addition, indoor set 1, off-premises station 2 comprise the device with the function same with controller 3 respectively, and carry out independently suppressing relevant control with amount of power respectively as monomer.
In addition, although describe feature item of the present invention in the above-described embodiment, but about the setup unit structure etc. in the device structure of cooling system, controller 3, be not limited to the content illustrated in each embodiment, and appropriately combined change of Denging can be carried out in the scope of technology of the present invention.
Claims (22)
1. a cooling system, is characterized in that, possesses:
Cooling device, the refrigerant loop that compressor, condenser, throttling arrangement and cooler connect with pipe arrangement by formation successively;
Amount of power measurement mechanism, measures the amount of power that described cooling device consumes; And
Control device, according to the electric power value that this amount of power measurement mechanism is measured, individually carries out the control in multiple stage to the running of multiple cooling device,
Formulate with multiple setting electric power value in advance and control execution scope,
The electric power value that described control device is measured according to described amount of power measurement mechanism, carries out the control of defined in described control execution scope.
2. cooling system according to claim 1, is characterized in that,
The electric power value that described control device is measured according to described amount of power measurement mechanism, carries out the control of the upper limit of the operating frequency limiting described compressor.
3. cooling system according to claim 1, is characterized in that,
The electric power value that described control device is measured according to described amount of power measurement mechanism, carries out the control of the desired value of the evaporating temperature of the cold-producing medium changed in described cooler.
4. cooling system according to claim 1, is characterized in that,
The electric power value that described control device is measured according to described amount of power measurement mechanism, carries out the control of the desired value of the temperature changing cooling object space.
5. cooling system according to claim 1, is characterized in that,
The electric power value that described control device is measured according to amount of power measurement mechanism, carries out the control that described compressor is stopped.
6. cooling system according to claim 5, is characterized in that,
Between described condenser and described throttling arrangement, also possess opening and closing device, this opening and closing device controls the flowing of cold-producing medium by opening and closing,
Described control device carries out the control of cutting out by described opening and closing device in order to make described compressor stop.
7. cooling system according to claim 1, is characterized in that,
The electric power value that described control device is measured according to described amount of power measurement mechanism, carries out the control of the current operating frequency limiting described compressor.
8. cooling system according to claim 1, is characterized in that,
Described control device carries out the control of the prediction electric power value after the stipulated time calculated based on the electric power value measured according to described amount of power measurement mechanism.
9. cooling system according to claim 1, is characterized in that,
Described control device at least can set the order of the control content in each stage.
10. cooling system according to claim 1, is characterized in that,
Described control device at random can set the high limit of tolerance temperature in the cooling object space in when carrying out interim control, each control.
11. cooling systems according to claim 1, is characterized in that,
Also possess temperature detecting unit, this temperature detecting unit detects the temperature of the cooling object space of multiple cooling device respectively,
The difference of the high limit of tolerance temperature of the temperature that described control device detects according to described temperature detecting unit and each cooling object space, determines the control sequence of each cooling device.
12. cooling systems according to claim 1, is characterized in that,
The control time of carrying out controlling can at random set for each described control by described control device.
13. cooling systems according to claim 1, is characterized in that,
Described control device can at random set for each control or each equipment the control cycle carrying out controlling.
14. cooling systems according to claim 1, is characterized in that,
If described control device is judged as the higher limit exceeding described electric power value after the control carrying out final level, then exporting is the abnormal meaning.
15. cooling systems according to claim 10, is characterized in that,
If described control device is judged as exceeding set described high limit of tolerance temperature, then adjourning control and usually control.
16. cooling systems according to claim 1, is characterized in that,
One or more indoor set be arranged in one or more cooling object space and one or more off-premises station be arranged on outside described cooling object space are carried out to pipe arrangement connection and form one or more cooling device,
If described off-premises station and described indoor set are judged as by carrying out interim control with the communication of described control device, then to carry out common control.
17. cooling systems according to claim 1, is characterized in that,
One or more indoor set be arranged in one or more cooling object space and one or more off-premises station be arranged on outside described cooling object space are carried out to pipe arrangement connection and form one or more cooling device,
Described off-premises station and described indoor set have amount of power measurement mechanism, and the signal comprising the amount of power that each amount of power measurement mechanism is measured is sent to described control device.
18. cooling systems according to claim 1, is characterized in that,
One or more indoor set be arranged in one or more cooling object space and one or more off-premises station be arranged on outside described cooling object space are carried out to pipe arrangement connection and form one or more cooling device,
Described indoor set has described control device.
19. cooling systems according to claim 1, is characterized in that,
One or more indoor set be arranged in one or more cooling object space and one or more off-premises station be arranged on outside described cooling object space are carried out to pipe arrangement connection and form one or more cooling device,
Described off-premises station has described control device.
20. cooling systems according to claim 1, is characterized in that,
One or more indoor set be arranged in one or more cooling object space and one or more off-premises station be arranged on outside described cooling object space are carried out to pipe arrangement connection and form one or more cooling device,
Described control device can, among described off-premises station and described indoor set, select setting to carry out indoor set and/or the off-premises station of interim control.
21. cooling systems according to claim 1, is characterized in that,
Also possess display unit, this display unit carries out carrying out with described control device the off-premises station of the control of described stage and/or the relevant display of indoor set.
22. cooling systems according to claim 1, is characterized in that,
Make to comprise R410A, CO
2, R404A or R32 cold-producing medium circulate in described refrigerant loop.
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| JP2012012095 | 2012-01-24 | ||
| JP2012-012095 | 2012-01-24 | ||
| JP2012-133133 | 2012-06-12 | ||
| JP2012133133A JP5955115B2 (en) | 2012-01-24 | 2012-06-12 | Cooling system |
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| CN103216983B true CN103216983B (en) | 2016-04-13 |
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| KR20160084149A (en) * | 2015-01-05 | 2016-07-13 | 엘지전자 주식회사 | A method for controlling a refrigerator |
| CN107560259B (en) * | 2017-09-01 | 2020-03-03 | 广东美的暖通设备有限公司 | Multi-split system and low-temperature starting control method and device of multi-split system |
| CN109028707A (en) * | 2018-07-02 | 2018-12-18 | 珠海格力电器股份有限公司 | Cold storage control system and method |
| JP6855152B1 (en) * | 2020-04-21 | 2021-04-07 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner and management device |
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