WO2017141388A1 - Système frigorifique - Google Patents

Système frigorifique Download PDF

Info

Publication number
WO2017141388A1
WO2017141388A1 PCT/JP2016/054658 JP2016054658W WO2017141388A1 WO 2017141388 A1 WO2017141388 A1 WO 2017141388A1 JP 2016054658 W JP2016054658 W JP 2016054658W WO 2017141388 A1 WO2017141388 A1 WO 2017141388A1
Authority
WO
WIPO (PCT)
Prior art keywords
absolute humidity
refrigeration system
temperature
evaporator
internal
Prior art date
Application number
PCT/JP2016/054658
Other languages
English (en)
Japanese (ja)
Inventor
拓哉 紺谷
▲高▼田　茂生
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2017567887A priority Critical patent/JP6615236B2/ja
Priority to PCT/JP2016/054658 priority patent/WO2017141388A1/fr
Publication of WO2017141388A1 publication Critical patent/WO2017141388A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D13/00—Stationary devices, e.g. cold-rooms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/04—Preventing the formation of frost or condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost

Definitions

  • the present invention relates to a refrigeration system.
  • a compressor, an outdoor heat exchanger, and an indoor heat exchanger are connected to each other to provide a refrigerant circuit that performs a refrigeration cycle, and the compressor is configured so that the vapor temperature or condensation temperature of the refrigerant in the indoor heat exchanger becomes a target value.
  • air conditioners There are air conditioners whose capacity is limited. Patent Document 1 describes such an air conditioner in which a target value of an evaporation temperature or a condensation temperature determined based on a set temperature in a room can be set by manual input.
  • concrete is used for the inner wall surface of a cooling space such as a refrigerated warehouse or a refrigerated warehouse where a refrigeration system is installed.
  • Concrete changes in volume due to changes in temperature and humidity. Therefore, when the cooling space is rapidly cooled, moisture existing in the cooling space or moisture existing inside the inner wall surface of the concrete may rapidly expand, and cracks may occur in the inner wall surface. Therefore, when the temperature in the cooling space is higher than the target chamber temperature and must be close to the target chamber temperature, the evaporation temperature of the refrigeration system is set several times to prevent cracking of the inner wall surface. The target internal temperature is created over time.
  • the present invention is for solving the above-described problems, and aims to improve work efficiency and energy loss in the cooling operation of the refrigeration apparatus.
  • a refrigeration system includes a heat source device having a compressor and a condenser, an evaporator and a fan for supplying air to the evaporator, a utilization unit disposed in a cooling space, and a heat source device.
  • a refrigeration system comprising a compressor and a condenser connected to an evaporator to form a refrigeration cycle circuit, wherein the control unit cools a cooling space.
  • the dehumidification control for automatically reducing the absolute humidity of the cooling space is automatically performed before the temperature of the cooling space becomes equal to or lower than the freezing point.
  • the dehumidification control is automatically performed before the temperature of the cooling space falls below the freezing point. Therefore, the efficiency of the work for preventing the cracks of the wall surfaces constituting the cooling space can be improved.
  • Embodiment 1 is a configuration diagram of a refrigeration system according to Embodiment 1 of the present invention. It is a flowchart which shows the control procedure of the refrigeration system which concerns on Embodiment 1 of this invention. It is a flowchart which shows the control procedure of the refrigeration system which concerns on Embodiment 2 of this invention. It is a flowchart which shows the control procedure of the refrigeration system which concerns on Embodiment 2 and Embodiment 3 of this invention. It is a block diagram of the refrigeration system which concerns on Embodiment 3 of this invention. It is a flowchart which shows the control procedure of the refrigeration system which concerns on Embodiment 3 of this invention.
  • FIG. 1 is a configuration diagram of a refrigeration system according to Embodiment 1 of the present invention.
  • An article (not shown) to be frozen and stored is stored in the freezer warehouse 2 in which the refrigeration system 1 is introduced.
  • the refrigeration system 1 includes a heat source device 10, a control unit 20, and a unit cooler 30.
  • the heat source device 10 includes a compressor 11, a condenser 12, and a condenser fan 13 that blows air to the condenser 12.
  • the condenser 12 is provided with a condensation temperature sensor 14 for detecting the condensation temperature.
  • the compressor 11 may be a constant speed compressor, or a compressor that includes an inverter device and is inverter-controlled.
  • the control unit 20 controls each unit of the refrigeration system 1, and is configured by, for example, a microcomputer or a DSP (Digital Signal Processor).
  • the unit cooler 30 includes a throttling device 31, an evaporator 32, and an evaporator fan 33 that sends air to the evaporator 32.
  • the evaporator 32 is provided with an evaporation temperature sensor 34 for detecting the evaporation temperature.
  • the freezer warehouse 2 includes an internal temperature sensor 40 that detects the internal temperature of the freezer warehouse 2 (hereinafter referred to as the internal temperature) and a storage that detects the relative humidity inside the freezer warehouse 2 (hereinafter internal relative humidity).
  • An internal humidity sensor 41 is installed.
  • the control unit 20 includes a communication transceiver (not shown). Via the communication transceiver, the condenser fan 13 of the heat source unit 10, the condensation temperature sensor 14, the evaporator fan 33 of the unit cooler 30, and the evaporation Communication is possible between the temperature sensor 34, the internal temperature sensor 40 of the freezer warehouse 2, and the internal humidity sensor 41. Based on the detection results of the condensation temperature sensor 14, the evaporation temperature sensor 34, the internal temperature sensor 40, and the internal humidity sensor 41, the control unit 20 determines the air volume of the condenser fan 13, the air volume of the evaporator fan 33, and the evaporation temperature. Take control.
  • the compressor 11 and the condenser 12 of the heat source unit 10 and the expansion device 31 and the evaporator 32 of the unit cooler 30 constitute the following refrigeration cycle.
  • the gas refrigerant compressed and discharged by the compressor 11 flows into the condenser 12.
  • the gas refrigerant flowing into the condenser 12 exchanges heat with the air sent from the condenser fan 13, is condensed, and flows out of the condenser 12.
  • the refrigerant that has flowed out of the condenser 12 flows into the expansion device 31 and is expanded and depressurized in the expansion device 31.
  • the gas-liquid two-phase refrigerant decompressed in the condenser 12 flows into the evaporator 32.
  • the gas-liquid two-phase refrigerant that has flowed into the evaporator 32 exchanges heat with the air supplied from the evaporator fan 33, evaporates, and flows out of the evaporator 32.
  • the refrigerant that has flowed out of the evaporator 32 is sucked into the compressor 11.
  • FIG. 2 is a flowchart showing a control procedure of the refrigeration system according to Embodiment 1 of the present invention. That is, FIG. 2 shows a processing procedure executed by the control unit 20 of the refrigeration system 1.
  • the control procedure of FIG. 2 is a control procedure of a trial run performed when the refrigeration system 1 is introduced into the refrigeration warehouse 2.
  • the trial operation means an operation performed to cool the inside of the freezer warehouse 2 that has not been cooled to the target internal temperature when the refrigeration system 1 is newly introduced into the freezer warehouse 2. To do.
  • step S10 the absolute humidity at the current temperature in the refrigerated warehouse 2 (hereinafter referred to as “warehouse”) based on the inside relative humidity detected by the inside humidity sensor 41 and the inside temperature detected by the inside temperature sensor 40. Inside absolute humidity) is calculated.
  • step S11 the calculated absolute humidity in the refrigerator is compared with the absolute humidity at 0 ° C., that is, the absolute humidity at the freezing point.
  • the absolute humidity of 0 ° C. is recorded in a storage medium such as a ROM (Read Only Memory) of the control unit 20. If the absolute humidity in the refrigerator is larger than the absolute humidity of 0 ° C, the process proceeds to step S12. If the absolute humidity in the refrigerator is equal to or less than the absolute humidity of 0 ° C, the process proceeds to step S21.
  • step S12 the evaporation temperature of the evaporator 32 and the air volume of the evaporator fan 33 of the unit cooler 30 are set so that the absolute humidity in the refrigerator is lowered based on the difference between the absolute humidity in the refrigerator and the absolute humidity of 0 ° C. .
  • the evaporator 32 and the evaporator fan 33 are driven by the set evaporation temperature and air flow, and the absolute humidity and the internal temperature of the freezer warehouse 2 are lowered.
  • step S13 where the current internal relative humidity is detected by the internal humidity sensor 41, the current internal temperature is detected by the internal temperature sensor 40, and the current absolute humidity is calculated in the same manner as in step S10. Is done.
  • step S14 based on the calculated absolute humidity and internal temperature, the current absolute humidity is higher than the absolute humidity of 0 ° C., and the difference between the internal temperature and 0 ° C. is greater than a predetermined threshold. Checked for smallness. In other words, it is checked whether the internal temperature is lowered to around 0 ° C. before the absolute humidity in the refrigerator is lowered to 0 ° C. absolute humidity. If it is confirmed that the internal temperature is lowered to around 0 ° C. before the absolute humidity in the refrigerator is lowered to 0 ° C., the process proceeds to step S15.
  • step S15 the evaporation temperature of the evaporator 32 is raised so that the internal temperature does not approach 0 ° C., and the air volume of the evaporator fan 33 is raised to increase the moisture removal efficiency.
  • step S14 the process returns to step S13, the current internal temperature is detected, and the current absolute humidity is calculated.
  • step S14 before the absolute humidity in the interior is reduced to 0 ° C. It is checked whether the internal temperature has dropped to around 0 ° C.
  • the absolute humidity and the internal temperature are fed back and the inclination of the absolute humidity and the inclination of the internal temperature are constantly monitored while the internal absolute humidity and the internal temperature are fed back.
  • the internal absolute humidity is lowered to 0 ° C.
  • step S14 If it is confirmed in step S14 that the absolute humidity in the cabinet has decreased to an absolute humidity of 0 ° C. and the internal temperature has decreased to near 0 ° C., the process proceeds to step S16.
  • step S16 it is checked whether the slope of the drop in absolute humidity in the cabinet has become smaller than a predetermined threshold value. When the slope of the absolute humidity drop is smaller than the predetermined threshold, frost adheres to the unit cooler 30 and the defrosting function is lowered, and as a result, the dehumidifying ability may be lowered. Therefore, if it is confirmed that the slope of the absolute humidity drop is smaller than a predetermined threshold value, the process proceeds to step S17, cooling by the unit cooler 30 is stopped, and defrosting (defrosting) is started.
  • the defrost is performed by a dedicated dehumidifier (not shown) provided in the unit cooler 30 against the frost attracted to the unit cooler 30 side by the cold air coming out of the unit cooler 30, and the off-cycle method, the heater method, Any of hot gas systems may be used.
  • step S18 the internal humidity and internal temperature after the start of defrosting are detected by the internal humidity sensor 41 and the internal temperature sensor 40, respectively, and the internal absolute humidity is calculated. Then, in step S19, it is checked whether the slope of the drop in the absolute humidity inside the box has become larger than a predetermined threshold value. When the slope of the absolute humidity drop is not greater than a predetermined threshold, it is determined that the dehumidifying capacity of the unit cooler 30 is still low. Accordingly, when it is confirmed that the slope of the absolute humidity drop is not greater than a predetermined threshold value, the defrost is continued and the process returns to step S18.
  • step S19 If it is confirmed in step S19 that the slope of the decrease in absolute humidity in the cabinet is greater than or equal to a predetermined threshold value, the process proceeds to step S20.
  • the fact that the slope of the decrease in absolute humidity in the refrigerator has reached a predetermined threshold or more means that the frost attached to the unit cooler 30 has been removed by the defrost, and the dehumidifying ability of the unit cooler 30 has been recovered. Accordingly, the defrost is terminated in step S20. When the defrost is completed, the process returns to step S11 and the above-described processing is repeated.
  • step S16 when it is confirmed that the slope of the decrease in the absolute humidity in the cabinet is equal to or greater than a predetermined threshold value, it is determined that the unit cooler 30 exhibits the dehumidifying ability. Therefore, in this case, defrosting is not performed, the process returns to step S11, and the above-described processing is repeated.
  • the predetermined threshold value used for checking the difference between the internal temperature and 0 ° C. in step S14 and the predetermined threshold value used for checking the slope of the absolute humidity drop in steps S16 and S19 are determined by the user. It may be set. This makes it possible to set the start and end of defrost according to the situation.
  • step S11 it is confirmed that the absolute humidity in the cabinet is equal to or lower than the absolute humidity of 0 ° C. and the process proceeds to step S21, it is checked whether the absolute humidity in the cabinet is equal to or lower than the absolute humidity at 0 ° C.
  • the absolute humidity in the refrigerator is below the absolute humidity at 0 ° C, the cooling space of the freezer warehouse 2 is sufficiently dehumidified, and the moisture contained in the air becomes ice even if the internal temperature drops to near 0 ° C. It is determined that the wall of the freezer warehouse 2 will not expand and crack. Accordingly, in this case, the process proceeds to step S22, and the operation of the unit cooler 30 is continued while the internal temperature is maintained near 0 ° C.
  • the time for which the cooling operation should be continued near the inside temperature of 0 ° C. varies depending on the size of the cooling space. Therefore, in the present embodiment, the time for the cooling operation near the internal temperature of 0 ° C. can be appropriately set by the control unit 20 according to the size of the cooling space in the freezer warehouse 2.
  • step S21 If it is confirmed in step S21 that the absolute humidity in the refrigerator is higher than the absolute humidity of 0 ° C., it is determined that the cooling space in the freezer warehouse 2 is not sufficiently dehumidified. Accordingly, in this case, the process returns to step S11 and the above-described processing is repeated.
  • the evaporation temperature and the air volume of the evaporator fan 33 are automatically set while feeding back the absolute humidity and the internal temperature, and the inside of the freezer warehouse 2 is also stored. If the internal temperature has dropped to around 0 ° C. before the absolute humidity has dropped to 0 ° C., dehumidification control is executed while suppressing a decrease in the internal temperature. Accordingly, when the refrigeration system 1 is introduced into the refrigeration warehouse 2, the burden on the facility worker for preventing cracks in the inner wall surface is reduced, and work efficiency is improved.
  • FIG. 3 and 4 are flowcharts showing the control procedure of the refrigeration system according to Embodiment 2 of the present invention.
  • the processes in steps S30 to S33 are the same as the processes in steps S10 to S13 in the flowchart of FIG. 2 described in the first embodiment.
  • the current absolute humidity in the freezer warehouse 2 is calculated (step S30), and the absolute humidity in the refrigerator and the absolute humidity at 0 ° C. are compared (step S31).
  • the evaporation of the evaporator 32 of the unit cooler 30 is performed so that the absolute humidity in the refrigerator decreases based on the difference between the absolute humidity in the refrigerator and the absolute humidity at 0 ° C.
  • the temperature and the air volume of the evaporator fan 33 are set (step S32), the current internal relative humidity and the internal temperature are detected, and the current absolute humidity is calculated (step S33).
  • step S34 the current internal absolute humidity is compared with the previously calculated internal absolute humidity, and the current internal temperature is compared with the previously calculated internal temperature.
  • the process proceeds to step S35.
  • the process proceeds to step S40 in FIG. 4 while fixing the evaporation temperature and the air volume of the evaporator fan 33.
  • step S35 a process of gradually increasing the air volume of the evaporator fan 33 of the unit cooler 30 is performed so as to send cool air to the entire cooling space in the freezer warehouse 2. Moreover, the detection of the internal temperature and the calculation of the absolute humidity inside the storage are executed.
  • step S36 the current internal absolute humidity and the previously calculated internal absolute humidity are compared, and the current internal temperature and the previously calculated internal temperature are compared.
  • step S37 the process proceeds to step S40 in FIG. 4 while the fan air volume of the evaporator fan 33 is fixed.
  • step S37 a process of gradually lowering the evaporation temperature of the unit cooler 30 is executed. Moreover, the detection of the internal temperature and the calculation of the absolute humidity inside the storage are executed.
  • step S38 the current internal absolute humidity is compared with the previously calculated internal absolute humidity, and the current internal temperature is compared with the previously calculated internal temperature.
  • step S39 the process proceeds to step S40 in FIG. 4 while fixing the evaporation temperature.
  • step S39 defrosting is performed in step S39.
  • the defrost is performed by a dedicated dehumidifier (not shown) provided in the unit cooler 30, and the defrost method may be any of an off-cycle method, a heater method, and a hot gas method. If defrosting is performed in step S39, the process returns to step S33 and the above-described processing is repeated.
  • step S40 the process proceeds to step S40 in FIG.
  • the processes after step S40 are the same processes as steps S14, S15, and S22 of the flowchart of FIG. 2 of the first embodiment.
  • step S40 Before the absolute humidity falls to 0 ° C absolute humidity, it is checked whether the internal temperature has dropped to near 0 ° C (step S40), and the internal temperature drops to 0 ° C absolute humidity. If it is confirmed that the temperature is lowered to around 0 ° C., the evaporation temperature and the air volume of the evaporator fan 33 are increased (step S41). Further, when it is confirmed in step S40 that the absolute humidity in the refrigerator is equal to or lower than the absolute humidity at 0 ° C., the operation of the unit cooler 30 is continued while the internal temperature is maintained near 0 ° C. (step S42).
  • the evaporation temperature and the air volume of the evaporator fan 33 are automatically adjusted while feeding back the absolute humidity and the internal temperature of the refrigerator, and the cooling capacity of the unit cooler 30 is adjusted to the cooling space in the freezer warehouse 2.
  • the dehumidification control for lowering the absolute humidity in the refrigerator to 0 ° C. and performing the dehumidification control to reduce the internal temperature to 0 ° C. is performed in the same manner as in the first embodiment.
  • the burden on the facility builder for preventing cracks in the inner wall surface is reduced, and work efficiency is improved.
  • FIG. FIG. 5 is a configuration diagram of a refrigeration system according to Embodiment 3 of the present invention
  • FIG. 6 is a flowchart showing a control procedure of the refrigeration system according to Embodiment 3.
  • three refrigeration apparatuses 110, 120, and 130 are introduced into the refrigeration warehouse 200.
  • the refrigeration apparatuses 110, 120, and 130 have heat source devices 111, 121, and 131, and unit coolers 112, 122, and 132, respectively.
  • the unit coolers 112, 122, and 132 are disposed in the refrigeration warehouse 200.
  • the heat source unit 111 includes a compressor 111A and a condenser 111B
  • the unit cooler 112 includes an expansion unit 112A, an evaporator 112B, and an evaporator fan 112C
  • the heat source unit 121 includes a compressor 121A and a condenser 121B
  • the unit cooler 122 includes a throttling device 122A, an evaporator 122B, and an evaporator fan 122C.
  • the heat source unit 131 includes a compressor 131A and a condenser 131B
  • the unit cooler 132 includes an expansion unit 132A, an evaporator 132B, and an evaporator fan 132C.
  • the refrigeration apparatuses 110, 120, and 130 constitute a refrigeration cycle similar to the refrigeration cycle configured by the heat source unit 10 and the unit cooler 30 of the refrigeration system 1 of the first embodiment.
  • an internal temperature sensor 400 for detecting the internal temperature and an internal relative humidity sensor 401 for detecting the internal relative humidity are disposed.
  • the control unit 300 includes a communication transceiver (not shown), and the above-described units of the refrigeration apparatuses 110, 120, and 130, the internal temperature sensor 400, and the internal relative humidity sensor 401 are connected via the communication transceiver. Communication between them is possible.
  • the control unit 300 determines the evaporator of the unit cooler 112 based on the detection results of the evaporation temperature sensors 112D, 122D, and 132D of the refrigeration apparatuses 110, 120, and 130, the internal temperature sensor 400, the internal relative humidity sensor 401, and the like.
  • the air volume and evaporation temperature of the fan 112C, the air volume and evaporation temperature of the evaporator fan 122C of the unit cooler 122, and the air volume and evaporation temperature of the evaporator fan 132C of the unit cooler 132 are individually controlled.
  • step S50 to S58 is substantially the same as the processing from step S30 to S38 in the flowchart of FIG. 3 showing the control procedure in the second embodiment.
  • the difference from the second embodiment is that the trial operation of one refrigeration apparatus is controlled in the second embodiment, whereas the trial operation of a plurality of (three) refrigeration apparatuses is controlled in the present embodiment. That is the point.
  • the internal absolute humidity at the current temperature in the freezer warehouse 200 is calculated (step). S50), the absolute humidity in the refrigerator and the absolute humidity of 0 ° C. are compared (step S51), and if it is confirmed that the absolute humidity in the refrigerator is greater than the absolute humidity of 0 ° C., the refrigeration apparatus 110, 120, 130 is determined in step S52. Any one of the refrigeration apparatuses is activated, and the unit cooler is activated. At this time, the evaporating temperature of the unit cooler to be activated and the air volume of the evaporator fan are set so that the absolute humidity in the refrigerator is lowered.
  • step S53 to S57 While the absolute humidity and the internal temperature are fed back, if either the absolute humidity or the internal temperature does not decrease, the air volume of the evaporator fan of the unit cooler in operation is increased. Processing (step S55) and processing (step S57) for decreasing the evaporation temperature of the operating unit cooler are executed.
  • step S58 If either the absolute humidity or the internal temperature does not decrease even if the air volume of the evaporator fan of the operating unit cooler is increased and the evaporation temperature of the operating unit cooler is decreased (YES in step S58) The process proceeds to step S59.
  • the cooling space of the freezer warehouse 200 is wide and the cooling capacity of the operating unit cooler is not sufficient, or frost adheres to the operating unit cooler and the defrosting capacity or cooling capacity is increased. The case where it has fallen is considered. Accordingly, in step S59, it is checked whether or not there is a non-operating unit cooler. If it is confirmed that there is a non-operating unit cooler, the process proceeds to step S60, and the non-operating unit cooler is activated. Thereafter, the process returns to step S53, and the process of setting the evaporation temperature of the operating unit cooler and the air volume of the evaporator fan is repeated while feeding back the absolute temperature and the absolute humidity in the refrigerator.
  • step S59 if it is confirmed in step S59 that all of the unit coolers 112, 122, and 132 are operating and there is no unit cooler that is not operating, the process proceeds to step S61, and defrosting is performed.
  • the defrost is performed by a dedicated dehumidifier (not shown) disposed in each of the unit coolers 112, 122, and 132, and may be any of an off-cycle method, a heater method, and a hot gas method. Thereafter, the process returns to step S53, and the process of setting the evaporation temperature of the operating unit cooler and the air volume of the evaporator fan is repeated while feeding back the absolute temperature and the absolute humidity in the refrigerator.
  • the feedback of the absolute humidity and the internal temperature while detecting the decrease in the absolute humidity and the decrease in the internal temperature is the same as in the second embodiment. is there. And, unlike the second embodiment, if any one of the decrease in the absolute humidity and the decrease in the internal temperature cannot be confirmed, if there is an unoperated unit cooler, it is activated, By controlling the air volume and the evaporation temperature of the evaporator fan of the unit cooler, a drop in the absolute humidity and the internal temperature can be realized.
  • step S58 When it is confirmed in step S58 that the internal humidity and the internal temperature have decreased, the process proceeds to step S40 in FIG.
  • the absolute humidity in the refrigerator is lowered to 0 ° C. and the internal temperature is reduced to near 0 ° C.
  • the operating unit cooler is controlled while feeding back the absolute humidity and the internal temperature. Therefore, the cooling capacity of the refrigeration system can be increased efficiently even in an extremely wide refrigerated space.
  • the dehumidification control for lowering the absolute humidity in the refrigerator to 0 ° C. and performing the dehumidification control to reduce the internal temperature to 0 ° C. is performed in the same manner as in the first embodiment.
  • step S55 the process of increasing the air flow of the evaporator fan in step S55 and the process of decreasing the evaporation temperature in step S57 may be performed by rotating the unit coolers 112, 122, and 132. By performing the rotation control, the load of each unit cooler is distributed.
  • three refrigeration apparatuses 110, 120, and 130 are introduced into the refrigeration warehouse 200, but the number of refrigeration apparatuses is not limited to this.
  • the number of refrigeration apparatuses to be introduced is appropriately determined according to the size of the cooling space.
  • three units that is, a plurality of unit coolers 112, 122, 132 are arranged in a single refrigeration warehouse 200, and are controlled individually by the control unit 300. It has a configuration.
  • the mode of controlling the plurality of unit coolers is not limited to this. Individual control of multiple chambers that individually control a plurality of unit coolers in a refrigeration system in which a refrigeration unit is introduced into each of the plurality of refrigeration warehouses and the unit coolers of the respective refrigeration units are arranged inside the corresponding refrigeration warehouse It is also possible to perform. Even in such a configuration, the load on each unit cooler is distributed by rotating the operations of the plurality of unit coolers.
  • control unit 20 has a configuration for controlling the heat source unit 10 and the unit cooler 30, and in the third embodiment, the control unit 300 controls a plurality of heat source units and the unit cooler.
  • the present invention is not limited to this. It is good also as a structure which provides a control part separately in each of a heat source machine and a unit cooler.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

La présente invention concerne un système frigorifique destiné à calculer l'humidité absolue interne d'un entrepôt frigorifique sur la base de l'humidité relative interne et de la température interne de l'entrepôt frigorifique. Le système frigorifique règle une température d'évaporation et un écoulement d'air d'un ventilateur d'évaporateur pour un refroidisseur d'air installé dans l'entrepôt frigorifique afin de réduire l'humidité absolue interne lorsque l'humidité absolue interne est supérieure à l'humidité absolue à 0 °C. Le système frigorifique vérifie que la température interne n'ait pas chuté jusqu'à environ 0 °C avant que l'humidité absolue interne chute jusqu'à l'humidité absolue à 0 °C et, une fois que le système frigorifique a confirmé que la température absolue interne a chuté, il élève la température d'évaporation et l'écoulement d'air du ventilateur d'évaporateur pour le refroidisseur d'air. Lors du retour des données d'humidité absolue interne et de température interne, le système frigorifique régule la température d'évaporation et l'écoulement d'air du ventilateur d'évaporateur pour le refroidisseur d'air et, dès qu'il est confirmé que l'humidité absolue interne est égale ou inférieure à l'humidité absolue à 0 °C, le système frigorifique actionne le refroidisseur d'air pendant un temps prédéfini dans un état dans lequel la température interne est d'environ 0 °C.
PCT/JP2016/054658 2016-02-18 2016-02-18 Système frigorifique WO2017141388A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2017567887A JP6615236B2 (ja) 2016-02-18 2016-02-18 冷凍システム
PCT/JP2016/054658 WO2017141388A1 (fr) 2016-02-18 2016-02-18 Système frigorifique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/054658 WO2017141388A1 (fr) 2016-02-18 2016-02-18 Système frigorifique

Publications (1)

Publication Number Publication Date
WO2017141388A1 true WO2017141388A1 (fr) 2017-08-24

Family

ID=59625708

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/054658 WO2017141388A1 (fr) 2016-02-18 2016-02-18 Système frigorifique

Country Status (2)

Country Link
JP (1) JP6615236B2 (fr)
WO (1) WO2017141388A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020008550A1 (fr) * 2018-07-04 2020-01-09 三菱電機株式会社 Dispositif de gestion d'économie d'énergie, système de gestion d'économie d'énergie, procédé et programme de gestion d'économie d'énergie
US11137179B2 (en) * 2018-06-22 2021-10-05 Daikin Industries, Ltd. Refrigeration apparatus
JP7468167B2 (ja) 2020-06-08 2024-04-16 富士電機株式会社 冷却装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61107070A (ja) * 1984-10-31 1986-05-24 三洋電機株式会社 冷凍装置の運転方法
JPH0518660A (ja) * 1991-07-09 1993-01-26 Kajima Corp 瞬間凍結庫
JPH06229659A (ja) * 1993-01-29 1994-08-19 Sanyo Electric Co Ltd 低温庫
JPH11270946A (ja) * 1998-12-25 1999-10-05 Toshiba Corp 店舗用冷凍サイクル装置
JP2014020715A (ja) * 2012-07-20 2014-02-03 Toshiba Corp 冷蔵庫

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61107070A (ja) * 1984-10-31 1986-05-24 三洋電機株式会社 冷凍装置の運転方法
JPH0518660A (ja) * 1991-07-09 1993-01-26 Kajima Corp 瞬間凍結庫
JPH06229659A (ja) * 1993-01-29 1994-08-19 Sanyo Electric Co Ltd 低温庫
JPH11270946A (ja) * 1998-12-25 1999-10-05 Toshiba Corp 店舗用冷凍サイクル装置
JP2014020715A (ja) * 2012-07-20 2014-02-03 Toshiba Corp 冷蔵庫

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11137179B2 (en) * 2018-06-22 2021-10-05 Daikin Industries, Ltd. Refrigeration apparatus
WO2020008550A1 (fr) * 2018-07-04 2020-01-09 三菱電機株式会社 Dispositif de gestion d'économie d'énergie, système de gestion d'économie d'énergie, procédé et programme de gestion d'économie d'énergie
JPWO2020008550A1 (ja) * 2018-07-04 2021-02-15 三菱電機株式会社 省エネ管理装置、省エネ管理システム、省エネ管理方法及びプログラム
JP7019044B2 (ja) 2018-07-04 2022-02-14 三菱電機株式会社 省エネ管理装置、省エネ管理システム、省エネ管理方法及びプログラム
JP7468167B2 (ja) 2020-06-08 2024-04-16 富士電機株式会社 冷却装置

Also Published As

Publication number Publication date
JP6615236B2 (ja) 2019-12-04
JPWO2017141388A1 (ja) 2018-09-06

Similar Documents

Publication Publication Date Title
CN100472155C (zh) 电冰箱及其控制方法
EP3093588B1 (fr) Réfrigérateur et procédé de commande d'un réfrigérateur
JP6225819B2 (ja) 空気調和機
EP1591736A1 (fr) Procédé de dégivrage pour un conditionneur d'air
JP6785987B2 (ja) 冷凍サイクル装置
US10145608B2 (en) Refrigerator and method of controlling the same
JP5999171B2 (ja) 空気調和装置
JP6615236B2 (ja) 冷凍システム
EP3475576B1 (fr) Réglage de la puissance frigorifique pour des refroidisseurs ayant des compresseurs à vis
US20200166259A1 (en) Refrigerator and method for controlling the same
WO2019003306A1 (fr) Dispositif de climatisation
JP6045440B2 (ja) 空気調和機の制御装置
EP3273191B1 (fr) Réfrigérateur et son procédé de commande constante de la température
EP2132504A2 (fr) Réfrigérateur et son procédé de commande
WO2019073517A1 (fr) Dispositif de climatisation
US20210063042A1 (en) Air conditioner and control method thereof
JP6949208B2 (ja) 空気調和機
JP2007298218A (ja) 冷凍装置
JPH11211241A (ja) 冷蔵庫
JP2015148414A (ja) 空気調和機
KR100470474B1 (ko) 멀티 에어컨의 제어장치 및 방법
JP2005133970A (ja) 空気調和装置
KR20170132958A (ko) 냉장고의 제상 운전 방법
KR20040024331A (ko) 멀티형 에어컨의 제상방법
JP2024086185A (ja) 冷却システム

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16890530

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2017567887

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16890530

Country of ref document: EP

Kind code of ref document: A1