EP4004456B1 - Kühlschranksystem und steuerverfahren dafür - Google Patents

Kühlschranksystem und steuerverfahren dafür Download PDF

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Publication number
EP4004456B1
EP4004456B1 EP20754499.0A EP20754499A EP4004456B1 EP 4004456 B1 EP4004456 B1 EP 4004456B1 EP 20754499 A EP20754499 A EP 20754499A EP 4004456 B1 EP4004456 B1 EP 4004456B1
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EP
European Patent Office
Prior art keywords
pressure
inverter compressor
range
indoor unit
outdoor unit
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Active
Application number
EP20754499.0A
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English (en)
French (fr)
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EP4004456A1 (de
Inventor
Chaochang Zhang
Jian Tian
Chengjian Che
Jiarun SHEN
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Carrier Corp
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Carrier Corp
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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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • 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
    • F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
    • F25D19/003—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors with respect to movable containers
    • 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control devices
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—Component parts or details not otherwise provided for in this subclass
    • F25B2400/22—Refrigeration systems for supermarkets
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1933—Suction pressures
    • 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
    • F25D2500/00—Problems to be solved
    • F25D2500/02—Geometry problems

Definitions

  • the present invention relates to an improved refrigeration cabinet system and an improved method for controlling a refrigeration cabinet system.
  • Refrigeration cabinets are often used in various large supermarket, convenience stores or bakeries to preserve foods such as dairy products, beverages or bread.
  • the refrigerators can be divided into a refrigerated display cabinet with remote condensing units (hereinafter referred to as a split cabinet) and a commercial refrigerator with self-contained condensing units (hereinafter referred to as an integrated cabinet).
  • the integrated cabinet includes a compressor, a condenser and an evaporator that are integrated together, and the split cabinet includes an outdoor unit and one or more indoor units, wherein the compressor and the condenser are disposed in the outdoor unit, and the evaporator is disposed in each of the indoor units.
  • the operation of the refrigerator may cause the evaporators to frost, and the refrigeration system has a defrost mode to melt the frost condensed in the evaporators.
  • the object of the present invention is to solve or at least alleviate the problems in the related art.
  • a refrigeration cabinet system is provided as defined by appended independent claim 1.
  • the controller changes the operating frequency of the inverter compressor based on the pressure information to control the pressure on the suction side of the inverter compressor to be within a certain range, thereby maintaining a saturated evaporation temperature of each indoor unit to be within a range of -1.5°C to +1.5°C.
  • the controller changes the operating frequency of the inverter compressor based on the pressure information to control the pressure on the suction side of the inverter compressor to be within a range of P1 to P2, wherein P1+ ⁇ P corresponds to the pressure of saturated refrigerant at a temperature of - 1.5°C, and P2+ ⁇ P corresponds to the pressure of the saturated refrigerant at a temperature of +1.5°C, and wherein ⁇ P is a pressure correction value.
  • the pressure correction value ⁇ P is determined based on field tests or depends on the lengths of the pipelines from the indoor unit outlets to the outdoor unit inlet.
  • the refrigeration cabinets system includes a plurality of indoor units, and length differences of the pipelines from each of the indoor unit outlets to the outdoor unit inlet range from -20% to +20%.
  • the evaporator of at least one of the indoor units is located above or below the display cabinet, and a fin density of the evaporator is in a range of 6-14 FPI, and/or the evaporator of at least one of the indoor units is located behind the display cabinet, and a fin density of the evaporator is in a range of 3-8 FPI.
  • the indoor units do not have a defrost mode.
  • an inventive method for controlling a refrigeration cabinets system is provided, which is defined by appended independent claim 7 and which is to be used in the refrigeration cabinets system according to the embodiments, wherein the method includes:
  • the method includes: changing the operating frequency of the inverter compressor based on the pressure information to control the pressure on the suction side of the inverter compressor to be within a range of P1 to P2, wherein P1+ ⁇ P corresponds to the pressure of saturated refrigerant at a temperature of -1.5°C, and P2+ ⁇ P corresponds to the pressure of the saturated refrigerant at a temperature of +1.5°C, and wherein ⁇ P is a pressure correction value.
  • the pressure correction value ⁇ P is determined based on field tests or depends on the lengths of the pipelines from the indoor unit outlets to the outdoor unit inlet.
  • the method includes: controlling length differences of the pipelines from each of the indoor unit outlets to the outdoor unit inlet to be within a range from -20% to +20%; and in some embodiments, the method includes: disposing the evaporators below or above the display cabinet and setting a fin density of the evaporators in a range of 6-14 FPI, and/or disposing the evaporators behind the display cabinet and setting a fin density of the evaporators in a range of 3-8 FPI.
  • the refrigeration cabinets system and the control method according to the embodiments of the present disclosure improve the efficiency of the refrigeration cabinets system.
  • orientational terms that have been mentioned or might be mentioned in this specification, such as “upper”, “lower”, “left”, “right”, “front”, “rear”, “front side”, “back side”, “top”, “bottom”, etc., are defined relative to the configurations shown in the drawings. They are relative concepts, so they may change accordingly according to their different locations and different states of use. Therefore, these or other orientational terms should not be interpreted as restrictive terms.
  • the refrigeration cabinets system includes: one or more indoor units 21, 22, 23, an outdoor unit 1, and a pipeline 3 connecting the indoor units 21, 22 and 23 with the outdoor unit 1.
  • the one or more indoor units 21, 22, 23 may be in the form of a cabinet, and they may respectively include: indoor unit inlets 211, 221, indoor unit outlets 212, 222, expansion valves 213, 223 between the indoor unit inlets 211, 221 and the indoor unit outlets 212, 222, such as thermal expansion valves or electronic expansion valves, evaporators 214, 224 downstream of the expansion valves 213, 223, and a display cabinet cooled by the evaporators 214, 224.
  • the display cabinet may be open or closed, the food in it is cooled by the evaporators, and the display cabinet is used to place and display the food. In general, the display cabinet may be located above or below the evaporators.
  • the outdoor unit 1 includes: an outdoor unit inlet 11, an outdoor unit outlet 12, an inverter compressor 15 between the outdoor unit inlet 11 and the outdoor unit outlet 12, a pressure sensor 13 on an inlet side of the inverter compressor 15, a condenser 16 downstream of the inverter compressor 15, and a controller 14 for controlling an operating frequency of the inverter compressor 15.
  • the outdoor unit outlet 12 is connected to each indoor unit inlet 211, 221 through a pipeline 31, and each indoor unit outlet 212, 222 is connected to the outdoor unit inlet 11 through pipelines 321, 322.
  • the controller 14 is connected to the pressure sensor 13 to obtain pressure information of fluid on the inlet side of the inverter compressor 15, and the controller 14 changes the compressor frequency based on the pressure information to control the pressure at the outdoor unit inlet to be within a certain range, thereby controlling a saturated evaporation temperature of each indoor unit to be within a range of -1.5°C to +1.5°C.
  • the pressure on the inlet side of the compressor is controlled to be within a certain range, so that the temperature at the outlets of the evaporators are controlled to be within a range of -1.5°C to +1.5°C, thereby avoiding frosting in the evaporators and ensuring the preservation temperature of the food is stable.
  • the evaporators do not frost, there is no need to configure a defrost mode for the evaporators, which can improve the energy efficiency of the entire system.
  • the evaporators do not have substantial frost, the density of the fins in the evaporators can also be increased, the heat exchange efficiency can be improved, and the refrigeration cabinets system can be operated stably in a humid environment.
  • the controller 14 changes the operating frequency of the inverter compressor based on the pressure information to control the pressure on the suction side of the inverter compressor to be within a range of P1 to P2, wherein P1+ ⁇ P corresponds to the pressure of saturated refrigerant at a temperature of -1.5°C, and P2+ ⁇ P corresponds to the pressure of the saturated refrigerant at a temperature of +1.5°C, and wherein ⁇ P is a pressure correction value.
  • the frequency of the inverter compressor 15 can be increased until the pressure on the suction side of the inverter compressor 15 is restored to the control range; otherwise, the frequency of the inverter compressor 15 is decreased.
  • the pressure correction value ⁇ P may be determined based on field tests or depends on the lengths of the pipelines from the indoor unit outlets to the outdoor unit inlet. More specifically, since the goal is to control the temperature at the outlet of the evaporator of each indoor unit to be within a range of -1.5°C to +1.5°C, when the fluid flows from the outlet of each evaporator to the inlet side of the inverter compressor of the outdoor unit, there will be pressure loss ⁇ P, which depends on factors such as pipeline lengths and surrounding environment. Once the installation of the system is completed, it may be considered that the loss is basically determined.
  • the saturation evaporation temperature (which corresponds to the pressure in an one-to-one correspondence) of each indoor unit has a correspondence to the pressure on the inlet side of the inverter compressor, and the goal of controlling the saturated evaporation temperature can be achieved by controlling the pressure on the inlet side of the inverter compressor.
  • the pressure on the suction side of the inverter compressor can be controlled to be within the range of P1 to P2, wherein P1+ ⁇ P corresponds to the pressure of saturated refrigerant at a temperature of -1.5°C, P2+ ⁇ P corresponds to the pressure of the saturated refrigerant at a temperature of +1.5°C, and ⁇ P may for example take an average pressure drop from each indoor unit to the suction side of the compressor, which may be estimated based on the pipeline lengths and empirical formulas related to the pipeline lengths, or may be set based on field commissioning results.
  • the lengths of the pipelines from each of the indoor unit outlets to the outdoor unit inlet need to be set substantially the same when arranging the pipelines, thereby making the pressure losses of the pipelines be basically the same or closer to the pressure correction value ⁇ P.
  • length differences of the pipelines from each of the indoor unit outlets to the outdoor unit inlet may range from -20% to +20%.
  • the pipeline of the nearer indoor unit may include at least one detour, so that the lengths of the pipelines from the indoor unit outlet of each indoor unit to the pipeline gathering pipe P are basically the same.
  • the evaporators may be located above or below the display cabinet, and a fin density of the evaporators is in a range of 6-14 FPI, wherein FPI represents the number of fins per inch (2.54 cm) of length.
  • the evaporators may be located behind the display cabinet, and a fin density of the evaporators is in a range of 3-8 FPI. Since the indoor units according to the embodiment of the present disclosure do not have substantial frost, a thinner arrangement of the evaporators may be realized, so that the evaporators can be arranged on the back side of the refrigerator without occupying the spaces above or below the front side of the cabinet. Therefore, the display area on the front side of the cabinet of the refrigerator can be increased. In some embodiments, the indoor units do not have a defrost mode.
  • a method for controlling a refrigeration cabinets system includes: collecting pressure information on a suction side of an inverter compressor; and changing an operating frequency of the inverter compressor based on the pressure information to control the pressure or temperature on the suction side of the inverter compressor to be within a certain range, thereby maintaining a saturated evaporation temperature of the evaporator of each indoor unit to be within a range of -1.5°C to +1.5°C.

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

Claims (10)

  1. Kühlschranksystem, Folgendes umfassend:
    eine oder mehrere Inneneinheiten (21, 22, 23), die jeweils Folgendes umfassen: einen Inneneinheit-Einlass (211, 221), einen Inneneinheit-Auslass (212, 222), ein Expansionsventil (213, 223) zwischen dem Inneneinheit-Einlass und dem Inneneinheit-Auslass, einen Verdampfer (214, 224) stromabwärts des Expansionsventils und einen durch den Verdampfer gekühlten Schauschrank; und
    eine Außeneinheit (1), die Folgendes umfasst: einen Außeneinheit-Einlass (11), einen Außeneinheit-Auslass (12), einen Wechselrichterverdichter (15) zwischen dem Außeneinheit-Einlass und dem Außeneinheit-Auslass, einen Kondensator (16) stromabwärts des Wechselrichterverdichters, eine Steuerung (14) zum Steuern einer Betriebsfrequenz des Wechselrichterverdichters und einen Drucksensor (13) auf einer Saugseite des Wechselrichterverdichters;
    wobei der Außeneinheit-Auslass (12) mit jedem Inneneinheit-Einlass (211, 221) durch eine Rohrleitung (31) verbunden ist, und jeder Inneneinheit-Auslass (212, 222) mit dem Außeneinheit-Einlass (11) durch Rohrleitungen (321, 322) verbunden ist; und
    wobei die Steuerung (14) mit dem Drucksensor (13) verbunden ist, um Druckinformationen auf der Saugseite des Wechselrichterverdichters (15) zu erhalten, und die Steuerung konfiguriert ist, um die Betriebsfrequenz des Wechselrichterverdichters basierend auf den Druckinformationen zu ändern, um den Druck auf der Saugseite des Wechselrichterverdichters zu steuern, damit er innerhalb eines bestimmten Bereichs liegt; dadurch gekennzeichnet, dass die Steuerung konfiguriert ist, um durch Ändern der Betriebsfrequenz des Wechselrichterverdichters, um den Druck auf der Saugseite des Wechselrichterverdichters zu steuern, damit er innerhalb eines bestimmten Bereichs liegt, eine Sättigungsverdampfungstemperatur jeder Inneneinheit (21, 22, 23) aufrecht zu erhalten, damit sie innerhalb eines Bereichs von -1,5 °C bis +1,5 °C liegt.
  2. Kühlschranksystem nach Anspruch 1, wobei die Steuerung (14) konfiguriert ist, um die Betriebsfrequenz des Wechselrichterverdichters (15) basierend auf den Druckinformationen zu ändern, um den Druck auf der Saugseite des Wechselrichterverdichters zu steuern, damit er innerhalb eines Bereichs von P1 bis P2 liegt, und wobei P1+ΔP dem Druck des gesättigten Kältemittels bei einer Temperatur von -1,5 °C entspricht, P2+ΔP dem Druck des gesättigten Kältemittels bei einer Temperatur von +1,5 °C entspricht, und ΔP ein Druckkorrekturwert ist.
  3. Kühlschranksystem nach Anspruch 2, wobei der Druckkorrekturwert ΔP basierend auf Feldversuchen bestimmt wird oder von den Längen der Rohrleitungen (321, 322) von den Inneneinheit-Auslässen (212, 222) zu dem Außeneinheit-Einlass (11) abhängt.
  4. Kühlschranksystem nach Anspruch 1, wobei das Kühlschranksystem eine Vielzahl von Inneneinheiten (21, 22, 23) umfasst und Längendifferenzen der Rohrleitungen (321, 322) von jedem der Inneneinheit-Auslässe (212, 222) zu dem Außeneinheit-Einlass (11) von -20 % bis +20 % reichen.
  5. Kühlschranksystem nach Anspruch 1, wobei sich der Verdampfer (214, 224) mindestens einer der Inneneinheiten (21, 22, 23) oberhalb oder unterhalb des Schauschranks befindet und eine Lamellendichte des Verdampfers in einem Bereich von 6-14 FPI (2-5 Lamellen pro cm) liegt, und/oder sich der Verdampfer mindestens einer der Inneneinheiten hinter dem Schauschrank befindet und eine Lamellendichte des Verdampfers in einem Bereich von 3-8 FPI (1-3 Lamellen pro cm) liegt.
  6. Kühlschranksystem nach Anspruch 1, wobei die Inneneinheiten (21, 22, 23) keinen Abtaumodus aufweisen.
  7. Verfahren zum Steuern eines Kühlschranksystems, das auf das Kühlschranksystem nach einem der Ansprüche 1 bis 6 angewendet werden kann, wobei das Verfahren Folgendes umfasst:
    Sammeln von Druckinformationen auf einer Saugseite eines Wechselrichterverdichters (15); und
    Ändern einer Betriebsfrequenz des Wechselrichterverdichters basierend auf den Druckinformationen, um den Druck auf der Saugseite des Wechselrichterverdichters zu steuern, damit er innerhalb eines bestimmten Bereichs liegt;
    dadurch gekennzeichnet, dass Ändern der Betriebsfrequenz des Wechselrichterverdichters eine Sättigungsverdampfungstemperatur jeder Inneneinheit (21, 22, 23) aufrechterhält, damit sie in einem Bereich von -1,5 °C bis +1,5 °C liegt.
  8. Verfahren nach Anspruch 7, ferner Folgendes umfassend:
    Ändern der Betriebsfrequenz des Wechselrichterverdichters (15) basierend auf den Druckinformationen zu ändern, um den Druck auf der Saugseite des Wechselrichterverdichters zu steuern, damit er innerhalb eines Bereichs von P1 bis P2 liegt, wobei P1+ΔP dem Druck des gesättigten Kältemittels bei einer Temperatur von -1,5 °C entspricht, P2+ΔP dem Druck des gesättigten Kältemittels bei einer Temperatur von +1,5 °C entspricht, und ΔP ein Druckkorrekturwert ist.
  9. Verfahren nach Anspruch 8, wobei der Druckkorrekturwert ΔP basierend auf Feldversuchen bestimmt wird oder von den Längen der Rohrleitungen (321, 322) von den Inneneinheit-Auslässen (212, 222) zu dem Außeneinheit-Einlass (11) abhängt.
  10. Verfahren nach Anspruch 9, wobei das Verfahren Folgendes umfasst: Steuern von Längendifferenzen der Rohrleitungen (321, 322) von jedem der Inneneinheit-Auslässe (212, 222) zu dem Außeneinheit-Einlass (11), damit sie innerhalb eines Bereichs von -20 % bis +20 % liegen; und
    das Verfahren Folgendes umfasst: Anordnen der Verdampfer (214, 224) unterhalb oder oberhalb des Schauschranks und Einstellen einer Lamellendichte der Verdampfer in einem Bereich von 6-14 FPI (2-5 Lamellen pro cm), und/oder Anordnen der Verdampfer hinter dem Schauschrank und Einstellen einer Lamellendichte der Verdampfer in einem Bereich von 3-8 FPI (1-3 Lamellen pro cm) .
EP20754499.0A 2019-07-30 2020-07-23 Kühlschranksystem und steuerverfahren dafür Active EP4004456B1 (de)

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CN201910694650.3A CN112303978A (zh) 2019-07-30 2019-07-30 制冷柜系统和制冷柜系统控制方法
PCT/US2020/043244 WO2021021553A1 (en) 2019-07-30 2020-07-23 A refrigeration cabinet system and a control method thereof

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EP4004456B1 true EP4004456B1 (de) 2024-04-10

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JP6040041B2 (ja) * 2013-02-12 2016-12-07 サンデンホールディングス株式会社 ショーケース冷却装置
CN103591669B (zh) * 2013-10-18 2016-03-30 广东美的制冷设备有限公司 空调设备的防结霜方法和防结霜装置、空调设备
CN104791943B (zh) * 2014-01-21 2017-08-29 广东美的暖通设备有限公司 空调系统及其控制方法、空调系统的室外机
CN105805995B (zh) * 2016-04-29 2017-11-24 郑州凯雪冷链股份有限公司 多台冷柜共用冷凝机组独立控制系统
CN207501529U (zh) * 2017-09-30 2018-06-15 天津九鼎医学生物工程有限公司 一种节能变频冷柜

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FI4004456T3 (fi) 2024-04-18
EP4004456A1 (de) 2022-06-01
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ES2977494T3 (es) 2024-08-26
WO2021021553A1 (en) 2021-02-04

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