WO1984003138A1 - Dispositif de degivrage pour installation de refrigeration de gaz - Google Patents

Dispositif de degivrage pour installation de refrigeration de gaz Download PDF

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Publication number
WO1984003138A1
WO1984003138A1 PCT/JP1984/000031 JP8400031W WO8403138A1 WO 1984003138 A1 WO1984003138 A1 WO 1984003138A1 JP 8400031 W JP8400031 W JP 8400031W WO 8403138 A1 WO8403138 A1 WO 8403138A1
Authority
WO
WIPO (PCT)
Prior art keywords
evaporator
opening
cooling device
branch
branch flow
Prior art date
Application number
PCT/JP1984/000031
Other languages
English (en)
Japanese (ja)
Inventor
Takashi Yamamoto
Kesao Katsuyama
Ryoji Kobayashi
Original Assignee
Orion Machinery Co Ltd
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
Priority claimed from JP1534283U external-priority patent/JPS59120889U/ja
Priority claimed from JP949384U external-priority patent/JPS60121164U/ja
Application filed by Orion Machinery Co Ltd filed Critical Orion Machinery Co Ltd
Publication of WO1984003138A1 publication Critical patent/WO1984003138A1/fr

Links

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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • 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—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0403—Refrigeration circuit bypassing means for the condenser
    • 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

Definitions

  • cooling is performed by providing an evaporator in the refrigerant passage formed by connecting a compressor, a condenser, a decompression mechanism, and an evaporator in the gas flow path.
  • Evaporator of gas cooling device The present invention relates to a device for removing frost formed on the surface of an evaporator.
  • Figure 1 shows the first prior art example, where 1 is a compressor 2, a condenser 3, a pressure reducing mechanism consisting of a capillar tube 4, a vaporizer 5, a compressor-a condenser and a pressure reducing mechanism, and a vaporizer.
  • the evaporator 5 is provided in the gas flow path 8, which is a refrigerant circuit composed of a hot gas bypass pipe 7 that communicates with other devices via an electromagnetic valve 6.
  • Reference numeral 9 is a temperature detector mounted on the fin surface of the cooler, and 10 is a defrost controller that controls the blower 11 and the solenoid valve 6 by the signal of the temperature detector 9.
  • the first conventional example that operates as described above has the advantage that the number of parts is small and the structure is simple, it is impossible to keep the cooling air temperature constant because the cooling operation stops during defrosting. There was also a limit to the temperature at which cooling was possible.
  • the gas passage is divided into two, two refrigerant passages are also provided, and each evaporator has its own gas passage.
  • the compressors 2a and 2b, the condensers 3a and 3b, the pressure reducing mechanisms 4a and 4b, and the vaporizers 5a and 5b are provided in the gas flow paths 8a and 8b divided into two parts.
  • 12a and 12b are dampers whose opening and closing are controlled by the defrosting controller 10
  • 13a and 13b are electric heaters which are also controlled by the defrosting controller 10.
  • the present invention is configured so that the gas passage is partitioned by a plurality of partition plates, it is an object of the present invention to defrost without stopping the operation of the cooling device.
  • the present invention relates to a gas cooling device in which a vaporizer of a refrigerant circuit configured by connecting a compressor, a condenser, a decompression mechanism, and an vaporizer is provided in a gas flow path.
  • the body flow path is divided into a large number of branch flow paths, and an opening / closing means for closing and opening each branch flow path is provided, and an evaporator connected after branching the refrigerant circuit into each of the branch flow paths,
  • a means for heating the evaporator and a temperature detector for detecting the temperature of each evaporator are provided, and one branch flow path among the plurality of branch flow paths described above is always opened / closed by the opening / closing means. Is closed, and the evaporator in the closed branch flow passage is defrosted by operating the heating means to complete defrosting. After that, the dividing channel is opened by the opening / closing means.
  • the apparatus of the present invention is provided with a large number of 0-division flow paths, and even if one of the branch flow paths is being defrosted, the evaporators in the other diversion flow paths are controlled so that the cooling operation is performed. Highly accurate temperature control is possible without stopping.
  • FIGS. 1 and 2 are explanatory views of the prior art
  • FIGS. 3 to 8 show the working lines of the apparatus according to the present invention
  • FIGS. 3, 4, and 6 are respectively Front views showing the first, second, and third embodiments
  • FIG. 5 is a timing chart of the first and second embodiments
  • FIG. 7 is a side view showing the branched flow passage of FIG.
  • FIG. 8 is a timing chart showing the function of the defrost controller of the third embodiment.
  • reference numeral 20 denotes a gas flow passage that is divided into a large number of branch flow passages 21a to 21f by partition plates 22a to 22e in the gas cooling section, and 23 denotes a stepper motor or the like at the center.
  • An opening / closing means is provided which has a rotation driving unit 24 composed of an electric motor and a closing plate 25 at the tip end thereof, and which can be rotated and can close each of the dividing flow passages 21.
  • 26a to 26f are evaporators that are divided into a large number by the flow divider 27 and are provided in the dividing flow passages 21a to 21f via the solenoid valves 28a to 28f, respectively, and each of them is used to detect the degree of refraction.
  • Heaters 29a to 29f and heaters 30a to 30f consisting of electric heaters
  • frost will form on the fin surface of the evaporator 26a, for example.
  • the signal from the frost controller 32 closes the solenoid valve 28a to cool it.
  • the heater 30a is energized to start defrosting, and a signal is sent to the rotation driving unit 24 of the opening / closing means 23 to close the windshield.
  • Ventilation to the branch channel 21a is blocked by the closing means 25.
  • Defrosting is performed quickly and the surface temperature of the evaporator 26a
  • Solenoid valve 28a opens when T reaches the preset Tb.
  • the opening / closing means 40 is provided at the inlet of each branch flow passage 21a to 21f, and 40 is provided in each branch flow passage.
  • the opening and closing means 41, 42 are solenoids for opening and closing the opening and closing means.
  • FIG. 6 20 is divided into a large number by partition plates 22a to 22e.
  • the dividing flow passages 21a to 21f are divided into an inlet side and an outlet side by a partition plate 36 in a direction orthogonal to the partition plates 22a to 22e, and the evaporator is provided on the inlet side.
  • 26a to 26f are provided.
  • 23 has a rotary drive unit 24 composed of an electric motor such as a stepping motor in the central portion and a closing plate 25 at the tip end thereof for rotation and opening / closing capable of closing each of the branch flow passages 21a to 21f.
  • the opening / closing plate 25 is divided into an inlet side and an outlet side, but simultaneously opens and closes.
  • the evaporators 26a to 26f are branched into a large number by the flow divider 27 and are provided in the branch flow passages 21a to 21f via the check valves 34a to 34f, respectively, and are equipped with temperature detectors 29a to 29f, respectively.
  • the header 31 After passing through the vaporizers 26a to 26f and the solenoid valves 33a to 33f, the header 31 serves as one refrigerant distribution again.
  • Reference numeral 37 denotes a hot gas bypass pipe, which passes from the compressor 2 to the header 38, and is connected to each of the vaporizers 26a to 26f provided in each of the above-mentioned distribution channels 21a to 21f, and to each solenoid valve 39a. ⁇ 39f are connected, and after passing through the evaporators 26a to 26f, they are returned to the refrigerant channel via the check valves 35a to 35f and the header 40.
  • Reference numeral 32 is a defrost controller that controls the rotation drive unit 24 and solenoid valves 39a to 39f and 33a to 33f based on signals sent from the temperature detectors 29a to 29 ⁇ .
  • solenoid valves 39a to 39f and 33a to 33f To describe the operating states of the solenoid valves 39a to 39f and 33a to 33f, all solenoid valves 39a to 39f are turned off, solenoid valves 33a to 33f are turned on, and the temperature detection is performed during normal cooling operation. If a signal indicating that the temperature of the evaporator has dropped is sent from any of the intellectual devices 29a to 29f, the solenoid valve 39 to the corresponding evaporator turns on, hot gas flows in, and the solenoid valve 33 turns off. Hot gas enters the evaporator and causes frost.
  • the solenoid valve 39 corresponding to that command will be sent. Is turned off, the hot gas is shut off, the refrigerant is supplied to the evaporator through the check valve 34, and the solenoid valve 33 is turned on. If this is done sequentially for evaporators with frost, defrosting is always performed in one evaporator, but the steam generator 26 provided in the other branch passage 21 continues to operate. is there.
  • the defrosting device having the above-mentioned structure can be used to perform other operations. Rotating intermittently, the closing plate 25 is rotated at a predetermined time, and therefore, one of the multiple branch flow passages 21a to 21f is always connected to the inlet and outlet of one branch flow passage 21. It should be closed.
  • the solenoid valve 39 leading to the evaporator 26 in the closed branch flow passage 21 is turned on, the solenoid valve 33 is turned off, and the hot gas bypass pipe 37 is turned on by the timer gas command 37 in accordance with the instruction of the timer. Hot hot gas enters evaporator 26 for defrosting. After defrosting is completed, the temperature sensor 29 will display the temperature of the evaporator 26 concerned. Signal to the Frost Controller 32 that the
  • Solenoid valve 39 is turned off, solenoid valve 33 is turned on, and the refrigerant is
  • the closing plate of the opening / closing means that has closed the
  • the device according to the present invention is capable of continuous operation and

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)
  • Defrosting Systems (AREA)

Abstract

Un dispositif de dégivrage élimine le givre formé sur un évaporateur (26) d'un circuit réfrigérant se composant d'un compresseur, d'un condenseur, d'un mécanisme réducteur de pression, et d'un évaporateur reliés à la suite. Le chemin d'écoulement du gaz dans le dispositif est divisé en une pluralité de chemins d'écoulement de dérivation (21) par des plaques de séparation (22). Chaque chemin d'écoulement de dérivation est pourvu d'un organe d'ouverture/fermeture (23) qui ouvre et ferme le chemin. En cas de formation de givre sur un évaporateur (26) à l'intérieur d'un chemin d'écoulement de dérivation, le chemin d'écoulement de dérivation (21) en question est fermé par l'organe d'ouverture/fermeture correspondant (23), et l'évaporateur (26) recouvert de givre est dégivré par un organe chauffant, obtenant ainsi une régulation très précise de la température sans qu'il soit nécessaire de suspendre le fonctionnement de l'installation de réfrigération.
PCT/JP1984/000031 1983-02-03 1984-02-01 Dispositif de degivrage pour installation de refrigeration de gaz WO1984003138A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1534283U JPS59120889U (ja) 1983-02-03 1983-02-03 気体冷却装置の除霜装置
JP949384U JPS60121164U (ja) 1984-01-26 1984-01-26 気体冷却装置の除霜装置

Publications (1)

Publication Number Publication Date
WO1984003138A1 true WO1984003138A1 (fr) 1984-08-16

Family

ID=26344237

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1984/000031 WO1984003138A1 (fr) 1983-02-03 1984-02-01 Dispositif de degivrage pour installation de refrigeration de gaz

Country Status (1)

Country Link
WO (1) WO1984003138A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU636062B1 (en) * 1991-10-01 1993-04-08 Goldstar Co., Ltd. Frost removing control circuit for an air conditioner using a heat pump
US5520006A (en) * 1994-08-02 1996-05-28 Northfield Freezing Systems, Inc. Airflow and defrosting system for refrigeration systems and apparatus
US5584437A (en) * 1993-05-31 1996-12-17 Samsung Electronics Co., Ltd. Air flow control apparatus in an air conditioner
US5839292A (en) * 1996-08-31 1998-11-24 Lg Electronics, Inc. Defroster for heat pump
CN107421206A (zh) * 2017-06-30 2017-12-01 青岛海尔特种电冰箱有限公司 冷藏冷冻装置及其控制方法
CN108917419A (zh) * 2018-08-16 2018-11-30 大连海事大学 空气冷却器控制***

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3427819A (en) * 1966-12-22 1969-02-18 Pet Inc High side defrost and head pressure controls for refrigeration systems
US3499295A (en) * 1968-06-17 1970-03-10 Emhart Corp Refrigeration system
US3501925A (en) * 1967-12-26 1970-03-24 Emhart Corp Refrigerated equipment
GB1244579A (en) * 1969-05-15 1971-09-02 Streater Ind Inc Ducted refrigeration unit
JPS54165364U (fr) * 1978-05-12 1979-11-20
JPS55105161A (en) * 1979-02-07 1980-08-12 Hitachi Ltd Heat exchanger

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3427819A (en) * 1966-12-22 1969-02-18 Pet Inc High side defrost and head pressure controls for refrigeration systems
US3501925A (en) * 1967-12-26 1970-03-24 Emhart Corp Refrigerated equipment
US3499295A (en) * 1968-06-17 1970-03-10 Emhart Corp Refrigeration system
GB1244579A (en) * 1969-05-15 1971-09-02 Streater Ind Inc Ducted refrigeration unit
JPS54165364U (fr) * 1978-05-12 1979-11-20
JPS55105161A (en) * 1979-02-07 1980-08-12 Hitachi Ltd Heat exchanger

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU636062B1 (en) * 1991-10-01 1993-04-08 Goldstar Co., Ltd. Frost removing control circuit for an air conditioner using a heat pump
US5584437A (en) * 1993-05-31 1996-12-17 Samsung Electronics Co., Ltd. Air flow control apparatus in an air conditioner
US5520006A (en) * 1994-08-02 1996-05-28 Northfield Freezing Systems, Inc. Airflow and defrosting system for refrigeration systems and apparatus
US5839292A (en) * 1996-08-31 1998-11-24 Lg Electronics, Inc. Defroster for heat pump
CN107421206A (zh) * 2017-06-30 2017-12-01 青岛海尔特种电冰箱有限公司 冷藏冷冻装置及其控制方法
CN107421206B (zh) * 2017-06-30 2019-10-01 青岛海尔特种电冰箱有限公司 冷藏冷冻装置及其控制方法
CN108917419A (zh) * 2018-08-16 2018-11-30 大连海事大学 空气冷却器控制***

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