An apparatus for managing operation of refrigerating machines controls defrosting of evaporators of refrigeration cycles. Each of the refrigeration cycles uses a compressor, a condenser, a decompressor, and the evaporator, and is formed for a corresponding one of cooling/heating devices installed in
An apparatus for managing operation of refrigerating machines controls defrosting of evaporators of refrigeration cycles. Each of the refrigeration cycles uses a compressor, a condenser, a decompressor, and the evaporator, and is formed for a corresponding one of cooling/heating devices installed in a single store. The apparatus obtains a total estimated power consumption in a case of a pull-down operation using power consumptions necessary for the pull-down operation performed for the cooling/heating devices after defrosting is performed and using a power consumption of the store that includes at least the power consumptions of the refrigeration cycles and that is estimated for each of predetermined time periods. The apparatus changes defrosting start times or defrosting end times of the cooling/heating devices so that the total estimated power consumption does not exceed an upper limit value of a power consumption set in advance by the store.
대표청구항▼
1. An apparatus for managing operation of refrigerating machines by controlling defrosting of an evaporator for each of a plurality of refrigeration cycles, each of the plurality of refrigeration cycles using at least a compressor, a condenser, a decompressor and the evaporator and being for a corre
1. An apparatus for managing operation of refrigerating machines by controlling defrosting of an evaporator for each of a plurality of refrigeration cycles, each of the plurality of refrigeration cycles using at least a compressor, a condenser, a decompressor and the evaporator and being for a corresponding one of cooling/heating devices which are installed in a single store, each of the cooling/heating devices being configured to be capable of a cooling target to be cooled by utilizing an effect of heat absorption due to evaporation of a refrigerant in the evaporator, comprising: a storage section that stores, for each of the plurality of refrigeration cycles, a defrosting start time or defrosting end time and a power consumption during a pull-down operation, the power consumption during the pull-down operation being a power consumption which is necessary for the pull-down operation performed for a corresponding one of the cooling/heating devices after defrosting is performed;a power consumption estimating section that estimates a power consumption of the store for each of predetermined time periods, the power consumption of the store including at least the power consumptions of the plurality of refrigeration cycles; anda defrosting shift controller that changes the defrosting start time or defrosting end time so that a total estimated power consumption does not exceed an upper limit value of a power consumption when the pull-down operation is performed, the total estimated power consumption being obtained by adding the power consumption during the pull-down operation stored in the storage section to the power consumption estimated by the power consumption estimating section, the upper limit value of the power consumption being set in advance in the store;wherein, when the total estimated power consumption exceeds the upper limit value of the power consumption that is set in advance in the store, the defrosting shift controller swaps, among the plurality of refrigeration cycles, the defrosting start time or defrosting end time of one refrigeration cycle and the defrosting start time or defrosting end time of another refrigeration cycle. 2. The apparatus for managing operation of refrigerating machines according to claim 1, wherein, for a power consumption of the store for a day, the storage section divides 24 hours into 30-minute time periods, evaluates the integral of electric power consumed by the store for each of the 30-minute time periods over an interval of 30 minutes to obtain a value, and stores the value as a past power consumption. 3. The apparatus for managing operation of refrigerating machines according to claim 1, wherein the storage section stores a room temperature or outside air temperature of the store and a power consumption for each of the predetermined time periods, the power consumption for the predetermined time period corresponding to a change in the room temperature or outside air temperature, andwherein the power consumption estimating section estimates the total estimated power consumption for each of the predetermined time periods on the basis of a measured room temperature or outside air temperature of the store and a change in the measured room temperature or outside air temperature and on the basis of the room temperature or outside air temperature of the store and the power consumption for the predetermined time period which are stored in the storage section, the power consumption for the predetermined time period corresponding to the change in the room temperature or outside air temperature. 4. The apparatus for managing operation of refrigerating machines according to claim 1, wherein the storage section stores a weather condition and a power consumption for each of the predetermined time periods, the power consumption for the predetermined time period corresponding to a change in the weather condition, andwherein the power consumption estimating section estimates the total estimated power consumption for each of the predetermined time periods on the basis of an observed weather condition and a change in the observed weather condition and on the basis of the weather condition and the power consumption for the predetermined time period which are stored in the storage section, the power consumption for the predetermined time period corresponding to the change in the weather condition. 5. The apparatus for managing operation of refrigerating machines according to claim 1, wherein the storage section stores power consumptions for each of the predetermined time periods for the past year with respect to a time when the total estimated power consumption was most recently estimated. 6. The apparatus for managing operation of refrigerating machines according to claim 1, wherein the storage section stores power consumptions for each of the predetermined time periods for at least the past ten days with respect to a time when the power consumption was most recently estimated, and the power consumption estimating section estimates the total estimated power consumption for each of the predetermined time periods with reference to an average value of the power consumptions for the predetermined time period for at least the past ten days. 7. The apparatus for managing operation of refrigerating machines according to claim 1, wherein the power consumption estimating section estimates the total estimated power consumption for each of the predetermined time periods for at least the following three hours with respect to a time when the power consumption was most recently estimated. 8. The apparatus for managing operation of refrigerating machines according to claim 1, wherein estimation of the total estimated power consumption by the power consumption estimating section is performed every hour with respect to a time when the total estimated power consumption was most recently estimated. 9. The apparatus for managing operation of refrigerating machines according to claim 1, wherein the defrosting shift controller includes a calculation unit that acquires device information concerning each of the cooling/heating devices, and that calculates a defrosting period and a defrosting cycle of the cooling/heating device on the basis of the device information concerning the cooling/heating device,a group setting unit that sets a plurality of groups on the basis of the defrosting periods and the defrosting cycles which have been calculated by the calculation unit, each of the plurality of groups being a set of the cooling/heating devices whose defrosting periods are the same and whose defrosting cycles are the same,a group information storage unit that stores group information including at least power consumptions associated with the plurality of groups which have been set by the group setting unit, anda defrosting controller that, on the basis of the power consumptions included in the group information stored in the group information storage unit, determines an order for each of the plurality of groups, and that performs defrosting control on the cooling/heating devices belonging to the group. 10. The apparatus for managing operation of refrigerating machines according to claim 9, wherein the defrosting shift controller further includes a first group resetting unit that, when a total value of the power consumptions, during the pull-down operation, of the cooling/heating devices belonging to one group among the plurality of groups is equal to or higher than the upper limit value of the power consumption that is set in advance in the store, divides the one group so as to set a new group. 11. The apparatus for managing operation of refrigerating machines according to claim 10, wherein the defrosting shift controller further includes a second group resetting unit that, when all of the cooling/heating devices connected via a refrigerant pipe to one refrigerating machine belong to only one group among the plurality of groups, divides the one group so as to set a new group. 12. The apparatus for managing operation of refrigerating machines according to claim 11, wherein the defrosting shift controller further includes a third group resetting unit that, when defrosting of all of the cooling/heating devices has not been completed within a predetermined time period, combines at least two groups among the plurality of groups together so as to set a new group. 13. The apparatus for managing operation of refrigerating machines according to claim 12, wherein the defrosting shift controller further includes a fourth group resetting unit that causes, among the plurality of groups, at least some of the cooling/heating devices belonging to a group corresponding to a time slot in which a total value of a power consumption of a device other than the cooling/heating devices and the power consumptions of the cooling/heating devices in the store in which the cooling/heating devices are installed becomes a maximum, to belong to another group, and that swaps, among the plurality of groups, a time slot corresponding to a group corresponding to the time slot in which a total value of a power consumption of a device other than the cooling/heating devices and the power consumptions of the cooling/heating devices in the store in which the cooling/heating devices are installed becomes a maximum and a time slot corresponding to another group. 14. The apparatus for managing operation of refrigerating machines according to claim 1, wherein said apparatus includes a controller having a processor configured to perform functions of the apparatus for managing operation of refrigerator machines. 15. A system for managing operation of refrigerating machines by controlling defrosting of an evaporator for each of a plurality of refrigeration cycles, each of the plurality of refrigeration cycles using at least a compressor, a condenser, a decompressor and the evaporator and being for a corresponding one of cooling/heating devices which are installed in a single store, each of the cooling/heating devices being configured to be capable of a cooling target to be cooled by utilizing an effect of heat absorption due to evaporation of a refrigerant in the evaporator, comprising: an operation managing apparatus having a controller with a processor, data storage and a communications section;said data storage including a storage section that stores, for each of the plurality of refrigeration cycles, a defrosting start time or defrosting end time and a power consumption during a pull-down operation, the power consumption during the pull-down operation being a power consumption which is necessary for the pull-down operation performed for a corresponding one of the cooling/heating devices after defrosting is performed;said processor being configured with a power consumption estimating function that estimates a power consumption of the store for each of predetermined time periods, the power consumption of the store including at least the power consumptions of the plurality of refrigeration cycles; andsaid processor being configured with a defrosting shift function that changes the defrosting start time or defrosting end time so that a total estimated power consumption does not exceed an upper limit value of a power consumption when the pull-down operation is performed, the total estimated power consumption being obtained by adding the power consumption during the pull-down operation stored in the storage section to the power consumption estimated by the power consumption estimating section, the upper limit value of the power consumption being set in advance in the store;wherein, when the total estimated power consumption exceeds the upper limit value of the power consumption that is set in advance in the store, the defrosting shift function swaps, among the plurality of refrigeration cycles, the defrosting start time or defrosting end time of one refrigeration cycle and the defrosting start time or defrosting end time of another refrigeration cycle. 16. The system for managing operation of refrigerating machines according to claim 15, wherein said operation managing apparatus manages operations of a plurality of refrigerating machines employing communications signals transmitted to each of said plurality of individual refrigerating machines via said communications section.
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이 특허를 인용한 특허 (2)
Wang, Qi; Swift, Todd; Bair, III, Richard H., Refrigeration system having a variable speed compressor.
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