WO2016088153A1 - Dispositif de congélation - Google Patents

Dispositif de congélation Download PDF

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Publication number
WO2016088153A1
WO2016088153A1 PCT/JP2014/006050 JP2014006050W WO2016088153A1 WO 2016088153 A1 WO2016088153 A1 WO 2016088153A1 JP 2014006050 W JP2014006050 W JP 2014006050W WO 2016088153 A1 WO2016088153 A1 WO 2016088153A1
Authority
WO
WIPO (PCT)
Prior art keywords
evaporator
defrosting
cooling
turned
alarm switch
Prior art date
Application number
PCT/JP2014/006050
Other languages
English (en)
Japanese (ja)
Inventor
隆一郎 弘野
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 PCT/JP2014/006050 priority Critical patent/WO2016088153A1/fr
Publication of WO2016088153A1 publication Critical patent/WO2016088153A1/fr

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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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • 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
    • F25D21/08—Removing frost by electric heating
    • 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
    • F25D23/00—General constructional features

Definitions

  • This invention relates to control of a refrigeration apparatus when a person is confined in a cooling storage.
  • the present invention has been made to solve the above-described problems.
  • the first object is to quickly increase the internal temperature when a person is trapped in the cooling storage, and It is to obtain a refrigeration apparatus that can reduce the risk of being exposed to a low temperature environment for a long time.
  • a second object is to obtain a refrigeration apparatus that can protect an object to be cooled in the cooling storage to some extent while preventing a person from being exposed to a low temperature environment in the cooling storage for a long time.
  • a refrigeration apparatus includes a cooling storage that is cooled by an evaporator disposed in a warehouse, a refrigerant circuit in which a compressor, a condenser, an expansion valve, and an evaporator are annularly connected in the order described, Cooling by the operation of the evaporator fan that blows air inside the evaporator to the evaporator, the confinement alarm switch that is turned on by a person in the cooling storage, the defrosting means that removes frost on the surface of the evaporator, and the operation of the refrigerant circuit Operation switching means that switches between the cooling operation for cooling the inside of the storage and the defrosting operation for removing frost on the surface of the evaporator by the operation of the defrosting means, and the operation when the confinement alarm switch is turned on during the cooling operation And a first operation control means for operating the switching means and the defrosting means to switch to the defrosting operation and for continuing the defrosting operation when the confinement alarm switch is turned on during the cooling operation And
  • the refrigeration apparatus of the present invention starts the defrosting operation when the confinement alarm switch is turned on during the cooling operation, and continues the defrosting operation when the confinement alarm switch is turned on during the defrosting operation. Since it comprised as mentioned above, even if a person is confine
  • FIG. 1 is a block diagram showing a schematic configuration of a refrigeration apparatus according to Embodiments 1 and 2 of the present invention.
  • a refrigeration apparatus includes a condensing unit 2 disposed outside, a unit cooler 3 disposed in a cooling storage 1 that accommodates an object to be cooled, and these condensing units 2 and A control device 4 that performs various controls on the unit cooler 3, a confinement alarm switch 5 that is provided in the cooling storage 1 and is turned on by a person in the storage, and a thermistor that detects the internal temperature Example of temperature detector) 6.
  • the condensing unit 2 includes a compressor 7 that compresses and discharges refrigerant, a condenser 8 that performs heat exchange between the refrigerant from the compressor 7 and outdoor air, and a condenser that blows outdoor air to the condenser 8.
  • a fan 9 is provided.
  • the unit cooler 3 includes an expansion valve 11 that squeezes the refrigerant from the condenser 8 to reduce the pressure, an electromagnetic valve 10 disposed between the condenser 8 and the expansion valve 11, a refrigerant from the expansion valve 11, and internal air
  • the evaporator 12 that cools the interior by performing heat exchange, the evaporator fan 13 that blows the air in the warehouse to the evaporator 12, and the frost formation on the surface of the evaporator that is disposed in the vicinity of the evaporator 12
  • a defrosting heater 14 that is removed by being removed is provided.
  • the defrost heater 14 is heated to a high temperature and melts and removes frost adhering to the surface of the evaporator 12.
  • the compressor 7, the condenser 8, the electromagnetic valve 10, the expansion valve 11, and the evaporator 12 described above are arranged in this order and are connected annularly via the refrigerant pipe 15 to constitute the refrigerant circuit 16.
  • the control device 4 includes a microcomputer 41, a nonvolatile memory 42, a timer, a data bus, an input / output port, and the like.
  • Input means 43A and 43B for capturing signals from the confinement alarm switch 5 and the thermistor 6 are connected to the input side of the data bus.
  • Output means 44A to 44E for driving the compressor 7, the condenser fan 9, the evaporator fan 13, the expansion valve 11 and the like are connected to the output side of the data bus.
  • the microcomputer 41 includes a normal operation control means 45, an operation switching means 46, a defrosting operation control means 47, a fan control means 48, a first operation control means 49, a second operation control means 50, which will be described in detail later. And each function of the 3rd operation control means 51 is provided as program software. Each of these functions is stored in advance in the memory 42 as program data, and is extracted from the memory 42 and used in the microcomputer 41 as necessary.
  • the memory 42 stores in advance a set temperature related to the internal temperature of the cooling storage 1.
  • the function of the normal operation control means 45 of the microcomputer 41 is based on the operation information (room air temperature, set temperature, refrigerant pipe temperature, etc.) obtained according to the program read from the memory 42, and the motor speed of the compressor 7 , Predetermined control is performed for the fan speed of the condenser fan 9, the opening / closing of the electromagnetic valve 10, the opening degree of the expansion valve 11, the fan speed of the evaporator fan 13, the energization power of the defrost heater 14 Is.
  • a control device for an outdoor unit and a control device for an indoor unit are independent, and these control devices are connected via a contact or a communication line.
  • the operation mode is roughly divided into a cooling operation and a defrosting operation.
  • the refrigerant in the refrigerant circuit 16 is made high temperature and high pressure by the compressor 7, discharged from the compressor 7, and flows into the condenser 8.
  • the refrigerant flowing into the condenser 8 exchanges heat with the air sent from the condenser fan 9 and is condensed and liquefied.
  • the condensed and liquefied refrigerant flows through the connection pipe 15, passes through the electromagnetic valve 10, and flows into the expansion valve 11.
  • the refrigerant flowing into the expansion valve 11 is decompressed and expanded, and changes its state to a low-temperature and low-pressure gas-liquid two-phase refrigerant.
  • This gas-liquid two-phase refrigerant flows into the evaporator 12, heat exchanges with the internal air sent by the evaporator fan 13, and evaporates to gasify.
  • the evaporated gas refrigerant flows out of the evaporator 12, flows through the connection pipe 15, and is sucked again into the suction side of the compressor 7.
  • Such a refrigeration cycle operation of the refrigerant circuit 16 is repeated.
  • the cooling operation is stopped by stopping the compressor 7, the condenser fan 9 and the evaporator fan 13 of the refrigerant circuit 16 and closing the solenoid valve 10.
  • the defrosting operation is an operation mode for melting frost adhering to the surface of the evaporator 12 of the unit cooler 3.
  • a heater defrosting method is adopted in which the defrosting heater 14 is energized and the frost is melted by the generated heat. That is, the defrosting means 17 is comprised from the defrosting operation control means 47 of the control apparatus 4, the output means 44C, and the defrosting heater 14 of the unit cooler 3.
  • the defrosting means 17 is comprised from the defrosting operation control means 47 of the control apparatus 4, the output means 44C, and the defrosting heater 14 of the unit cooler 3.
  • FIG. During such defrosting operation the temperature of the unit cooler 3 is high in order to melt the frost. Normally, during the defrosting operation, the evaporator fan 13 of the unit cooler 3 is stopped because it is not desired to circulate the warmed air in the cooling storage 1.
  • FIG. 3 is a flowchart showing the control in Embodiment 1 of the present invention, and the control procedure will be described according to this flowchart.
  • the controller 4 detects that the confinement alarm switch 5 is turned on by a person inside the refrigerator during the operation of the refrigeration apparatus, the controller 4 first checks the operating state (step 11).
  • the function of the operation switching means 46 of the microcomputer 41 stops the cooling operation if the operation state is during the cooling operation, and starts the operation by switching the operation state to the defrosting operation (step 12).
  • the function of the operation switching means 46 continues the defrosting operation as it is (step 13).
  • the function of the first operation control means 49 of the microcomputer 41 is to operate the operation switching means 46 and the defrosting means 17 when the confinement alarm switch 5 is turned on by a person in the cabinet during the cooling operation. Switching to the defrosting operation, the defrosting operation is continued when the confinement alarm switch 5 is turned on during the defrosting operation. Thus, by performing the defrosting operation, the effect of increasing the internal temperature by the operation of the defrosting heater 14 can be expected.
  • the unit cooler 3 is usually installed at a position close to the ceiling in the cooling storage 1 so that it is trapped. It takes time to warm up to the air around the floor where people are. Therefore, the function of the fan control means 48 of the microcomputer 41 is to drive the evaporator fan 13 which is stopped during normal defrosting operation when the confinement alarm switch 5 is turned on by a person in the cooling storage 1. Is started (step 14). Thereby, the effect of warming the air per floor where the trapped person exists by circulating the warmed air in the cooling storage 1 more quickly can be expected.
  • FIG. 4 schematically shows the change in the internal temperature with time when this embodiment is implemented.
  • the microcomputer 41 detects that the confinement alarm switch 5 is pressed during the cooling operation, the defrosting operation is started, so that the temperature inside the chamber stops decreasing and rises. Begins.
  • the microcomputer 41 detects that the confinement alarm switch 5 is pressed during the defrosting operation, the internal temperature rises by continuing the defrosting operation. Continue.
  • the temperature in the cooling storage 1 can be raised by the defrosting operation and the operation of the evaporator fan 13.
  • the defrosting heater 14 itself becomes a high temperature exceeding 200 ° C. Therefore, when the defrost heater 14 is continuously energized for a long time, the internal temperature rises too much, and there is a possibility that a person trapped on the contrary is exposed to a high temperature environment for a long time.
  • the cooling storage 1 includes a thermistor 6 for measuring the internal temperature.
  • the function of the second operation control means 50 of the microcomputer 41 is that the confinement alarm switch 5 is turned on, and the internal temperature detected by the thermistor 6 is set for the comfort of the person and When the temperature reaches an appropriate set temperature (for example, 25 ° C.) with respect to the storage stability of the object to be cooled, the operation of the refrigerant circuit 16 is stopped (steps 15 and 16).
  • the operation stop here means that the defrosting operation is stopped and the operation of the evaporator fan 13 is also stopped. By controlling in this way, it is possible to prevent the internal temperature from rising excessively.
  • the frost removal operation is performed by switching to the defrosting operation. If so, it is configured to continue the defrosting operation as it is, so the temperature rise in the cooling storage 1 can be expected, and the risk that the trapped person will be exposed to the low temperature environment in the cooling storage for a long time is reduced. it can.
  • FIG. 5 is a flowchart showing the control in the second embodiment of the present invention. The operation will be described according to this flowchart.
  • the microcomputer 41 has the function of the third operation setting means 51.
  • the function of the third operation setting means 51 is to stop the cooling operation and continue to drive the evaporator fan 13 when the confinement alarm switch 5 is turned on during the cooling operation.
  • the function of the third operation setting means 51 is to stop the operation of the refrigerant circuit 16 when the confinement alarm switch 5 is turned on during the defrosting operation.
  • step 21 when the function of the third operation setting means 51 of the microcomputer 41 detects that the confinement alarm switch 5 is operated during the operation of the refrigeration apparatus, the operation state is first confirmed (step 21), and the cooling operation is performed. If it is inside, the cooling operation is stopped. Incidentally, although the evaporator fan 13 is also stopped when the normal cooling operation is stopped, the operation of the evaporator fan 13 is continued here (step 22). By doing so, since the cooling operation is stopped, the temperature in the cooling storage 1 is not further reduced, but by circulating the air in the storage, temperature unevenness in the storage can be prevented, The cooling material can be protected from temperature rise to some extent.
  • step 23 the operation of the refrigerant circuit 16 is stopped.
  • the evaporator fan 13 is already stopped during the defrosting operation. By doing in this way, it can prevent that the temperature in the cooling storage 1 raises further, and can protect a to-be-cooled object from temperature rise to some extent.
  • the control as shown in the second embodiment is a control that can be a particularly realistic choice when the temperature setting in the cooling storage 1 is relatively high.
  • the defrosting means 17 including the defrosting operation control means 47, the output means 44C, and the defrosting heater 14 is exemplified, but the defrosting means of the present invention is not limited thereto.
  • a four-way switching valve (not shown) for reversing the refrigerant flow direction of the refrigerant circuit 16 is newly provided in the refrigerant circuit 16, and the refrigerant flow path of the four-way switching valve is switched from the compressor 7 during the defrosting operation. It is also possible to make the defrosting means different from the defrosting means 17 by flowing the high-temperature and high-pressure refrigerant to the evaporator 12.

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  • 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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

L'invention concerne un dispositif de congélation comportant : un compartiment de stockage réfrigéré (1) ; un circuit de réfrigérant (16) dans lequel un compresseur (7), un condenseur (8), une soupape de détente (11) et un évaporateur (12) sont reliés dans une boucle ; un ventilateur d'évaporateur (13) ; un interrupteur d'alarme de travailleur piégé (5) pouvant être activé par un travailleur à l'intérieur du compartiment ; un moyen de dégivrage (17) destiné à éliminer le givre de l'évaporateur (12) ; un moyen de commutation de fonctionnement d'un dispositif de commande (4) destiné à commuter entre un fonctionnement de réfrigération pour réfrigérer l'intérieur du compartiment de stockage réfrigéré (1) et un fonctionnement de dégivrage pour éliminer le givre de l'évaporateur (12) ; et un premier moyen de commande de fonctionnement du dispositif de commande (4), destiné à passer en fonctionnement de dégivrage lorsque l'interrupteur d'alarme de travailleur piégé (5) est activé pendant le fonctionnement de réfrigération, et à poursuivre le fonctionnement de dégivrage lorsque l'interrupteur d'alarme de travailleur piégé (5) est activé pendant le fonctionnement de dégivrage, ce qui permet d'augmenter rapidement la température à l'intérieur du compartiment et de réduire le risque de mise en danger de la vie d'un travailleur lorsqu'un travailleur est enfermé à l'intérieur du compartiment de stockage réfrigéré.
PCT/JP2014/006050 2014-12-04 2014-12-04 Dispositif de congélation WO2016088153A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2014/006050 WO2016088153A1 (fr) 2014-12-04 2014-12-04 Dispositif de congélation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2014/006050 WO2016088153A1 (fr) 2014-12-04 2014-12-04 Dispositif de congélation

Publications (1)

Publication Number Publication Date
WO2016088153A1 true WO2016088153A1 (fr) 2016-06-09

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4721262U (fr) * 1971-02-27 1972-11-09
JPS5613228A (en) * 1979-07-11 1981-02-09 Fuji Heavy Ind Ltd Emergency alarm device for refrigeration vehicle
JPS588972A (ja) * 1981-07-09 1983-01-19 三菱電機株式会社 除霜制御装置
JPS63140278A (ja) * 1986-12-01 1988-06-11 株式会社東芝 冷蔵庫の除霜回路
JPH0599555A (ja) * 1991-10-08 1993-04-20 Sanyo Electric Co Ltd 除霜装置
JP2001280816A (ja) * 2000-03-31 2001-10-10 Sanyo Electric Co Ltd 冷却貯蔵庫
JP2005134090A (ja) * 2003-10-31 2005-05-26 Hoshizaki Electric Co Ltd 冷却貯蔵庫
JP2013221719A (ja) * 2012-04-19 2013-10-28 Panasonic Corp 冷蔵庫
JP2013253740A (ja) * 2012-06-07 2013-12-19 Fuji Electric Co Ltd 冷気循環式ショーケース

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4721262U (fr) * 1971-02-27 1972-11-09
JPS5613228A (en) * 1979-07-11 1981-02-09 Fuji Heavy Ind Ltd Emergency alarm device for refrigeration vehicle
JPS588972A (ja) * 1981-07-09 1983-01-19 三菱電機株式会社 除霜制御装置
JPS63140278A (ja) * 1986-12-01 1988-06-11 株式会社東芝 冷蔵庫の除霜回路
JPH0599555A (ja) * 1991-10-08 1993-04-20 Sanyo Electric Co Ltd 除霜装置
JP2001280816A (ja) * 2000-03-31 2001-10-10 Sanyo Electric Co Ltd 冷却貯蔵庫
JP2005134090A (ja) * 2003-10-31 2005-05-26 Hoshizaki Electric Co Ltd 冷却貯蔵庫
JP2013221719A (ja) * 2012-04-19 2013-10-28 Panasonic Corp 冷蔵庫
JP2013253740A (ja) * 2012-06-07 2013-12-19 Fuji Electric Co Ltd 冷気循環式ショーケース

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