WO2004016999A1 - Refrigerateur - Google Patents

Refrigerateur Download PDF

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Publication number
WO2004016999A1
WO2004016999A1 PCT/JP2003/010237 JP0310237W WO2004016999A1 WO 2004016999 A1 WO2004016999 A1 WO 2004016999A1 JP 0310237 W JP0310237 W JP 0310237W WO 2004016999 A1 WO2004016999 A1 WO 2004016999A1
Authority
WO
WIPO (PCT)
Prior art keywords
refrigerant
refrigerator
duty value
cooling
pressure side
Prior art date
Application number
PCT/JP2003/010237
Other languages
English (en)
Japanese (ja)
Inventor
Tsutomu Sakuma
Minoru Temmyo
Original Assignee
Kabushiki Kaisha Toshiba
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 Kabushiki Kaisha Toshiba filed Critical Kabushiki Kaisha Toshiba
Publication of WO2004016999A1 publication Critical patent/WO2004016999A1/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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
    • 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
    • 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
    • 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
    • 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
    • F25B2400/12—Inflammable refrigerants
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/222—Detecting refrigerant leaks
    • 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
    • F25B2600/25—Control of valves
    • F25B2600/2511—Evaporator distribution valves
    • 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
    • F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/04—Refrigerators with a horizontal mullion

Definitions

  • the present invention relates to a refrigerator using a flammable refrigerant in a refrigeration cycle.
  • a refrigerator which is provided with a means for detecting the leakage of the refrigerant, and when it detects the leakage of the refrigerant, notifies that effect and stops the operation.
  • Japanese Patent Application No. 2 0 0 1-3 3 6 6 0 2 etc. Japanese Patent Application No. 2 0 0 1-3 3 6 6 0 2 etc.
  • the patent application detects the leakage of refrigerant based on the load of the compressor, for example, the rate of change of the duty value of the compressor motor.
  • FIG. 8 shows a refrigerator equipped with a refrigerating evaporator (hereinafter, R evaporator) and a freezing evaporator (hereinafter, F evaporator), and alternately flowing refrigerant through these evaporators to cool the inside of the refrigerator It shows the change of the duty value of the compressor motor in the case.
  • R cooling indicates an operation mode of supplying a refrigerant to the R evaporator to cool the cold storage room or the vegetable room.
  • F cooling indicates an operation mode in which a refrigerant is supplied to the F evaporator to cool the freezer compartment and the like.
  • “Stop” indicates that the operation of the compressor or the like has been stopped, for example, when the temperature in the cold storage reaches the cold storage temperature.
  • “during opening” indicates that the door of the cooling room has been opened.
  • An object of the present invention is to provide a refrigerator using a flammable refrigerant for a refrigeration cycle, which can detect as quickly as possible whether the refrigerant leaks from the refrigeration cycle. Disclosure of the invention
  • the present invention relates to a refrigerator provided with a refrigeration cycle in which a flammable refrigerant is enclosed, wherein a risk that may occur when the refrigerant leaks when it is detected that a damage such as a leakage of the refrigerant has occurred in the refrigeration cycle Configured to perform processing to avoid It is That is, when damage such as refrigerant leakage occurs on the low pressure side of the refrigeration cycle, the outside air enters the refrigeration cycle from the site where the damage occurs, and the refrigerant in the refrigeration cycle gradually leaks out. Therefore, when the refrigerant leaks from the low pressure side of the refrigeration cycle or a precursor of the refrigerant is detected, the cooling operation is continued and the high voltage electrical components provided in the refrigerator body are temporarily stored. It is configured to stop.
  • the compressor constituting the refrigeration cycle is stopped and the radiator fan of the compressor is rotated for a predetermined time. After the operation, the compressor is configured to resume operation.
  • FIG. 1 shows an embodiment of the present invention, and is a part of a flow chart showing control contents of a control device for detecting the occurrence of a refrigerant leak in a refrigeration cycle or a precursor of the refrigerant leak.
  • Figure 2 is a continuation of the flowchart of Figure 1;
  • Figure 3 is a longitudinal side view showing the overall configuration of the refrigerator.
  • FIG. 4 shows the refrigeration cycle
  • Figure 5 is a block diagram showing the schematic electrical configuration of the refrigerator
  • Fig. 6 is a diagram showing the fluctuation of the duty value of the compressor motor when a refrigerant leak occurs on the low pressure side of the refrigeration cycle.
  • Fig. 7 is a diagram showing fluctuation of duty value of compressor motor at the time of refrigerant leakage on the high pressure side of the refrigeration cycle.
  • FIG. 8 is a diagram showing the fluctuation of the duty value of the compressor motor when the door is opened.
  • FIG. 3 showing the overall configuration of the refrigerator according to the present embodiment, a refrigerator room 2 as a storage room, a vegetable room 3, a switching room 4 and a freezer room 5 are located in the refrigerator main body 1 comprising a heat insulation box. It is provided in order from. Further, although not shown, an ice making chamber provided with an automatic ice making apparatus is disposed side by side next to the switching chamber 4.
  • the refrigerator compartment 2 and the vegetable compartment 3 are separated by a plastic partition plate 10.
  • the vegetable compartment 3, the switching compartment 4 and the ice making compartment are separated by a heat insulating partition 11. Further, the switching chamber 4 and the ice making chamber are separated by a heat insulating partition wall (not shown). As a result, the cold air flowing through the vegetable compartment 3, the switching compartment 4 and the icemaker becomes independent of each other.
  • a hinged door 6 with heat insulation is provided at the front of the refrigerator compartment 2.
  • the front of the vegetable room 3, switching room 4 and freezing room 5 has a thermally insulated drawer-type door 7, 8, 9 are provided respectively.
  • a deodorizing device 23 for deactivating the air in the refrigerator by activating the photocatalyst with high voltage.
  • Door switches 57 for detecting the opening and closing operations of the doors 6, 8, 9 are provided at the upper part in the cold storage room 2, the upper part in the switching room 4, and the upper part in the freezing room 5, respectively.
  • a storage light 17 is provided at the top of the cold storage room 2.
  • An operation panel 60 is provided on the front of the door 6.
  • the operation panel 60 has an audio unit 61 for notifying by voice that an abnormality has occurred, a display unit 62 for displaying the operating condition and temperature of the refrigerator, adjusting the temperature inside the compartment, and the operation mode and the display
  • An operation unit 6 3 (all shown only in FIG. 5) for switching the display of the unit 62 is provided.
  • An electric door opening device 25 is provided on the upper portion of the refrigerator body 1. Although not shown, the opening device 25 is an electromagnetic solenoid that moves a plunger in a direction to open the door 6 when energized, and a push rod that moves integrally with the plunger to press the door 6. And have. The opening device 25 is driven by operating a switch provided on the operation unit 63 or the door 6 to open the door 6.
  • a duct 12 is provided at the rear of the refrigerator compartment 2 in the refrigerator body 1.
  • a refrigerator evaporator room (hereinafter, R evaporator room) 100 is provided at the rear of the vegetable room 3 in the refrigerator body 1.
  • Refrigerant evaporator comprising a cooler for cold air circulation fan (below, R fan) 13, cold room 2 and vegetable room 3 in the R evaporator room 100 (below, R evaporator ) 1 4 etc. are provided.
  • R fan 13 cold air cooled by the R evaporator 14 is supplied into the cold storage room 2 through the duct 12 and then passes through the vegetable room 3 and the R evaporator room 10 Repeat the cycle of returning to 0. Thereby, the refrigerator compartment 2 and the vegetable compartment 3 are cooled.
  • the switching room 4 In the back of the refrigerator body 1, the switching room 4, the ice making room, the freezer room 5 and the evaporator room for freezing
  • F evaporator chamber 101 (Hereinafter, F evaporator chamber) 101 is provided.
  • the F evaporator chamber 101 includes a cold air circulation fan (hereinafter referred to as F fan) 15, a switching chamber 4, an ice chamber and a freezing chamber 5.
  • a refrigeration evaporator (hereinafter referred to as F evaporator) 16 which constitutes a cooler, and a defrost heater 18 which comprises a sheet heater are disposed.
  • the cold air cooled by the F evaporator 16 is supplied to the switching chamber 4, the freezing chamber 5, and the ice making chamber, and then it is circulated to return to the F evaporator chamber 101. Repeat. As a result, the switching chamber 4, the freezing chamber 5, and the ice making chamber are cooled.
  • a machine room 22 is formed at the rear lower part of the refrigerator body 1.
  • a compressor 20 a condenser 27 consisting of wire fin tubes, a heat dissipating fan (hereinafter referred to as a C fan) 19 for cooling the compressor 20 and the condenser 27. It is arranged.
  • FIG. 4 shows the configuration of the refrigeration cycle of the refrigerator according to the present embodiment.
  • a flammable refrigerant such as a HC refrigerant is used as the refrigerant.
  • the discharge port 20 a of the compressor 20 is connected to the condenser 27.
  • the outlet of the condenser 27 is connected to the inlet port of the switching valve 26.
  • One of the two outlet ports of the switching valve 26 is connected to the inlet of the R evaporator 14 via a refrigerator cab tube (hereinafter, R cab tube) 2 9.
  • the other outlet port of the switching valve 2 is connected to the inlet of the F evaporator 16 via a refrigeration ca- bility tube (hereinafter, F ca- bly tube) 30.
  • F ca- bly tube refrigeration ca- bility tube
  • the outlet of the R evaporator 14 is connected to the inlet of the F evaporator 16.
  • the outlet of the F evaporator 16 is connected to the suction port 20 b of the compressor 20 via an array 34.
  • the switching valve 26 is, for example, a motor drive type, and the state in which the inlet port is in communication with either of the two outlet ports, the state in which both are in communication (full open state), and the state in which neither is in communication (Fully closed) is configured to be switchable.
  • the refrigerant flow passes through the R cai bary tubes 2 9 and the R evaporator 14 to the F evaporator 16
  • the switching valve 26 is switched so that the refrigerant flows through the path 1.
  • the F ca in the freezing and cooling mode for cooling the freezing room 5, the switching room 4, and the ice making room, the F ca.
  • the switching valve 26 is switched so that the refrigerant flows in a second path toward the F evaporator 16 through 30.
  • FIG. 5 shows the electrical configuration of the refrigerator according to the present embodiment.
  • Control device 70 has door switch 5 7, multiple indoor temperature sensors 5 8, outside air temperature sensor 7 1, multiple evaporator temperature sensors 5 9, audio section 6 of operation panel 60, display section 6 2, operation Part 6 3, Compressor 20: Drive source of compressor motor 20 0, R fan 1 3, F fan 1 5, C fan 1 9, Defrosting heat source 1 8, Storage light 1 7, Deodorizing Device 2 3, door opening device 2 5, switching valve 26 etc. are connected.
  • the door switch 57 is for detecting the opening and closing of the door 6 of the cold storage room 2.
  • the controller 70 detects the opening of the door 6 based on the detection signal from the door switch 57, it turns on the interior light 17.
  • the indoor temperature sensor 58 detects the internal temperature of each storage room, and the evaporator temperature sensor 59 detects the temperatures of the evaporators 14 and 16.
  • An outside air temperature sensor 71 detects the outside temperature (room temperature).
  • the control unit 70 is operated by the compressor motor 20 0, the R fan 13 and the F fan 15 5, based on detected temperatures of the temperature sensors 58, 59, 71 and operation signals from the operation unit 63, etc.
  • C fan 1 9 Defrost heater 1 8 Deodorizer 2 3 Open door device 2 5 Control the switching valve 26.
  • control device 70 is configured to drive the compressor motor 200 by inverter control based on pulse width modulation. As described later, the controller 70 detects the load of the compressor 20 based on the pulse width modulation duty value, and the presence or absence of damage in the refrigeration cycle, and the location where the damage occurred is the low pressure side of the refrigeration cycle. It detects the high pressure side. Then, based on the detection result, the precursor of the occurrence of refrigerant leakage or the occurrence of refrigerant leakage in the refrigeration cycle is detected.
  • FIGS. 6 and 7 show that the compressor motor 200 is detented when damage occurs to the low pressure side and high pressure side of the refrigeration cycle, respectively. This is an experimental result of examining changes in the value of Here, it is assumed that damage was caused by opening the pinhole in the pipeline of the refrigeration cycle. Also, the low pressure side of the refrigeration cycle is between the cai- bary tubes 2 9, 30 0 and the suction port 20 b of the compressor 20, and the high pressure side of the refrigeration cycle is the discharge of the compressor 20. It is between the outlet 20 a and the capillary tube 2 9, 30 0.
  • arrow A indicates the leakage of the refrigerant or a precursor to leakage of the refrigerant is indicated by arrow B.
  • arrow C indicates when the compressor 20 has abnormally stopped.
  • the duty value of the compressor motor 200 is increased. This is considered to be because the low pressure in the pipeline in which the pinhole is opened causes the outside air to be sucked from the pinhole and the compressor 20 is loaded. Also, as shown in FIG. 6, when the duty value of the compressor motor 200 continues to rise, it is possible to rotate the rotor of the compressor motor 200 at a speed that matches the rotational speed command. The control unit 70 forcibly stops the compressor motor 70 (abnormal stop) because it can not do this.
  • the refrigerant Even if damage occurs on the low pressure side of the refrigeration cycle, the refrigerant will not leak only by sucking in the outside air for a while. Then, after the compressor motor 200 stops or after alternately repeating the cooling mode once or twice, the refrigerant gradually leaks out.
  • the duty value of the compressor motor 200 decreases. It is considered that this is because the high pressure in the pipeline in which the pin hole is opened causes the refrigerant to start to leak at the same time as the pin hole opens and the load on the compressor 20 is reduced.
  • the duty value of the compressor motor 2000 fluctuates due to the switching of the operation mode. Also, immediately after switching from the F cooling mode to the R cooling mode, the pump down (the refrigerant in the evaporator for refrigeration is sucked and recovered by the compressor) operation is performed, so the duty value of the compressor motor 200 is Will rise temporarily. Furthermore, at the start of the F cooling mode after stopping the compressor 20, the compressor 20 is not stable, and the duty value of the compressor motor 200 is temporarily increased. Furthermore, even when the door 6 is opened, the duty value of the compressor mode 200 changes significantly (see FIG. 8).
  • control device 70 is configured to detect the occurrence of the refrigerant leak or the precursor of the refrigerant leak based on the fluctuation of the duty value during the closing and in the same operation mode.
  • the control device 70 switches the switching valve 2 6 to alternately operate the refrigeration compartment 2 and the vegetable compartment 3 in the refrigeration compartment 5, the freezer compartment 5, the switching compartment 4, and the refrigeration compartment for cooling the ice making compartment. Run.
  • the control device 70 switches the switching valve R 26 so that the refrigerant passes through the R ca- biliary tube 2 9, the R evaporator 1 4 and the F evaporator 1 6.
  • R fan 13 and C fan 19 are driven.
  • the air cooled by the R evaporator 14 is supplied to the cold storage room 2 and the vegetable room 3, thereby cooling the cold storage room 2 and the vegetable room 3.
  • the control device 70 switches the switching valve 26 so that the refrigerant passes through the F ca- bary tube 30 and is directed to the F evaporator 16.
  • the F fan 15 and the C fan 19 are driven.
  • the air cooled by the F evaporator 16 is supplied to the freezing chamber 5, the switching chamber 4 and the ice making chamber, thereby cooling the freezing chamber 5, the switching chamber 4 and the ice making chamber.
  • the switching chamber 4 is configured such that the amount of supplied cold air is adjusted by a damper (not shown) or the like so as to reach a set temperature.
  • the control device 70 also drives the R fan 13. This is, R evaporator 14 This is for the purpose of melting the frost adhering to the 4 and promoting the defrosting. As a result, the amount of water contained in the air circulating in the refrigerator compartment 5 increases, and the humidity in the refrigerator compartment 5 can be increased.
  • the timing to switch between the refrigeration cooling mode and the freezing / cooling mode is determined in advance by the execution time of each mode, the temperature of the refrigerator compartment 2 and the freezer compartment 5, and the like.
  • the refrigeration cooling mode has passed a predetermined time (for example, 20 minutes), or the cooling room 2 reaches the cooling stop temperature, and the freezing room 5 has a predetermined temperature (for example When it rises, it switches from refrigeration refrigeration mode to refrigeration refrigeration mode.
  • a predetermined time for example, 20 minutes
  • the freezing room 5 has a predetermined temperature (for example When it rises, it switches from refrigeration refrigeration mode to refrigeration refrigeration mode.
  • the control device 70 energizes the defrost heater 18 to execute the defrost operation when the integrated operation time of the compressor 20 has passed, for example, 8 hours. As a result, the frost adhering to the F evaporator 16 is melted. Then, when the temperature of the F evaporator 16 reaches a predetermined temperature, for example, 3 ° C., the defrosting operation is ended, and the normal cooling operation is restarted.
  • the controller 70 proceeds to step 2 on condition that the normal cooling operation is being performed and the high voltage electrical component is in the ON state (Y ES in step 1).
  • step 2 it is determined whether the door 6 is closed. Then, when the door 6 is closed (Y E S), the process shifts to step 3.
  • the controller 70 since the duty value of the compressor motor 200 fluctuates even immediately after the door is closed, the controller 70 is closed for a predetermined time, for example 5 minutes, after the door switch 57 detects the door closing. I do not judge.
  • the compressor 20 when the compressor 20 is stopped, during defrosting operation, when the pump is down before R cooling (when the refrigerant in the evaporator 16 is sucked and recovered by the compressor 20), etc. Is the duty value of compressor 20 is appropriate Since it is not positive, the control unit 70 does not detect the duty value at the above timing.
  • step 3 it is determined whether the cooling mode has been switched or the number of revolutions of the compressor motor 200 has been changed. Then, if there is neither switching of the cooling mode nor change of the rotational speed of the compressor (NO), the process proceeds to step 4, and if there is switching of the cooling mode (YES), step 5 Migrate to
  • step 4 it is determined whether a reference duty value is set. If the reference duty value is set, the process proceeds to step 6, and if the reference duty value is not set, the process returns to step 2.
  • the processes of steps 3 and 4 prevent the compressor 20 from being unstable, for example, setting the reference duty value when the refrigerator is turned on.
  • step 5 the controller 70 detects the duty value of the compressor motor 200 and stores it as a reference duty value. This is because when the cooling mode is switched and when the number of revolutions of the compressor motor 200 is changed, the duty value largely fluctuates, so it is necessary to set the reference duty value again. In this case, the duty value does not become stable immediately after switching the cooling mode or immediately after changing the rotational speed of the compressor motor 200, or after switching the cooling mode, or after changing the compressor mode.
  • the duty value after a predetermined time, for example, 2 minutes has elapsed after changing the number of revolutions, is stored as the reference duty value.
  • step 6 the controller 70 determines whether the door 7 is closed. Then, if the door 7 is closed, proceed to step 7. In step 7, the controller 70 detects the duty value of the compressor motor 200. Then, the detected duty value and the reference duty value stored in step 5 are compared, and if the detected duty value is larger than the reference duty value (YES in step 8), step 9 Go to
  • step 9 the controller 70 determines whether the rate of increase of the detected duty value with respect to the reference duty ⁇ is a predetermined value, for example, 10% or more. And If the increase rate is 10% or more, proceed to step 10, and if less than 10%, return to step 1.
  • a predetermined value for example, 10% or more.
  • Steps 8 and 9 are processes for determining whether or not the low pressure side of the refrigeration cycle is damaged, in other words, whether or not the refrigerant leaks or may occur on the low pressure side of the refrigeration cycle. It corresponds to Therefore, in the present embodiment, the control device 70 functions as the low pressure side refrigerant leak detection means.
  • step 10 the controller 70 shuts down the high voltage electrical components.
  • the high voltage electrical components are electrical components that cause spark discharge when the wiring is cut and breaks down, etc.
  • the deodorizing device 23 corresponds to the high voltage electrical components. Do.
  • step 10 The increase in the duty value of the compressor motor 200 was not only when damage occurred on the low-pressure side of the refrigeration cycle, but also when the refrigeration cycle became unstable or food with a relatively high temperature was added. It happens also in the case. Therefore, it can not be accurately determined whether refrigerant leakage will occur or not, by only a temporary rise in the duty value. Therefore, in step 10, it is uncertain whether refrigerant leakage will occur or not, but it is possible to stop only high-voltage electrical components that may ignite if refrigerant leakage should occur.
  • the deodorizing device 23 has an explosion-proof structure and is configured so as not to ignite even if a refrigerant leak occurs. However, here, we are stopping to make the safety more secure. Further, the door opening device 25 is also a high voltage electrical component, but it is disposed outside the refrigerator and is less likely to catch fire if a refrigerant leak occurs. Further, unlike the deodorizing device 23, the user easily notices that the door opening device 25 has stopped. Therefore, stopping the refrigerant in an uncertain state whether or not a refrigerant leak will occur will also give the user a sense of mistrust if the refrigerant has not leaked. For this reason, in the present embodiment, the reliability is improved without stopping the door opening device 25. However, the opening device 25 may be stopped because it does not affect the cooling performance.
  • step 11 it is determined whether the compressor 20 has abnormally stopped. And If it does not stop abnormally, proceed to step 12 and if it stops abnormally, proceed to step 13 3.
  • step 12 it is determined whether a predetermined time (for example, one hour) has elapsed since a change in duty value is detected, or whether the cooling mode has been switched a predetermined number of times (for example, three times). Then, when a predetermined time has elapsed since a refrigerant leak has occurred, or when the switching of the cooling mode has been performed a predetermined number of times, the process returns to step 1. On the other hand, the process of step 11 is repeated until a predetermined time has elapsed since a refrigerant leak has occurred, or until switching of the cooling mode has been performed a predetermined number of times.
  • a predetermined time for example, one hour
  • the duty value of the compressor motor 200 fluctuates in the state where the refrigerant does not leak, it returns to the stable state after a certain period of time passes. However, if a refrigerant leak actually occurs, the duty value of the compressor motor 200 continues to increase, and eventually, the compressor 20 abnormally stops.
  • the duty value fluctuates due to another factor different from the occurrence of damage and the occurrence of refrigerant leakage when the predetermined time has elapsed without abnormal stop of the compressor 20.
  • the duty value fluctuates due to another factor different from the occurrence of damage and the occurrence of refrigerant leakage when the predetermined time has elapsed without abnormal stop of the compressor 20.
  • step 13 after switching the switching valve 26 to the fully closed state, the compressor motor 200 is disconnected.
  • processing is performed to prevent the refrigerant from leaking from the site where the damage has occurred.
  • each fan shall adopt an explosion-proof construction or a brushless motor so that it does not cause ignition.
  • Step 14 At the predetermined time, for example, 3 o'clock, after starting the process of Step 13 It is determined whether an interval has elapsed. Then, after 3 hours, it proceeds to step 15 and stops R fan 13, F fan 15 and C fan 19 and ends the process.
  • the control device 70 notifies, via the display unit 62 or the audio unit 61, a message indicating that damage to the refrigeration cycle has occurred at the stage where all the processing has been completed.
  • step 8 determines whether the duty value detected in step 8 is greater than the reference duty value (N o). If it is determined that the duty value detected in step 8 is not greater than the reference duty value (N o), the process proceeds to step 16.
  • the controller 70 determines whether the rate of decrease of the detected duty value with respect to the reference duty value is a predetermined value, for example, 10% or more. If the reduction rate is 10% or more, the process proceeds to step 17. If the reduction rate is less than 10%, the process returns to step 1.
  • Steps 8 and 16 determine whether damage has occurred on the high pressure side of the refrigeration cycle, in other words, whether there is a risk that refrigerant leakage may occur or may occur on the high pressure side of the refrigeration cycle.
  • the control device 70 functions as high pressure side refrigerant leak detection means.
  • step 17 the control unit 70 switches the switching valve 26 to the fully closed state to stop the compressor motor 200 and drive the C fan 19.
  • the control unit 70 switches the switching valve 26 to the fully closed state to stop the compressor motor 200 and drive the C fan 19.
  • step 18 it is determined whether a predetermined time, for example, 8 minutes, has elapsed since the process of step 17 was started. Then, after 8 minutes, proceed to step 19 and resume the normal cooling operation.
  • a predetermined time for example, 8 minutes
  • step 16 Even if it is judged at step 16 that the decrease rate of the detected duty value to the reference duty value is 10% or more, and it is detected that damage has occurred on the high pressure side of the refrigeration cycle, no damage has actually occurred. In some cases. Therefore, after performing the process of diffusing the cooling medium (step 17), the control unit 70 resumes the normal cooling operation, The process is supposed to end.
  • steps 1 to 15 and steps 1 to 17 correspond to processing as false detection prevention control means. That is, the control device 70 functions as an erroneous detection prevention control means.
  • the occurrence of refrigerant leakage in the refrigeration cycle is detected at an early stage, so safety can be achieved even when a flammable refrigerant is used as the refrigerant of the refrigeration cycle. It can be secured.
  • the refrigerant leak detection means may be configured to detect that the refrigerant has leaked from the refrigeration cycle or a precursor of the refrigerant leak based on the abnormal temperature rise of the evaporator, the compressor, and the condenser that constitute the refrigeration cycle. . In addition, it detects the refrigerant concentration in the storage room and machine room It is also possible to configure a sensor to detect leakage of refrigerant from the refrigeration cycle or a precursor of leakage of refrigerant based on the detection result of the sensor. Industrial applicability
  • the refrigerator according to the present invention is useful as a refrigerator equipped with a refrigeration cycle in consideration of the global environment by adopting a flammable refrigerant having a small ozone destruction coefficient and a small global warming coefficient.

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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)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

Réfrigérateur comportant des chambres de stockage (2, 3, 4, 5) situées dans un corps (1) de réfrigérateur, une unité pour cycle de réfrigération dans laquelle est enfermé de manière étanche un réfrigérant combustible et qui est constituée d'un compresseur (20), d'un condensateur (27) et d'évaporateurs (14, 16), un composant électrique à haute tension (23) fixé sur le corps de réfrigérateur, un moyen de réfrigération (70) qui réfrigère les chambres de stockage par entraînement du compresseur, un capteur (70) de fuite de réfrigérant coté basse pression qui est destiné à détecter une fuite de réfrigérant ou un signe annonciateur de fuite en provenance du côté basse pression de l'unité pour cycle de refroidissement, et un moyen de commande (70) en cas de fausse détection qui arrête temporairement le fonctionnement du composant électrique à haute pression tout en permettant au moyen de réfrigération de poursuivre l'opération de réfrigération lorsque le capteur de fuite de réfrigérant côté basse pression a détecté une fuite de réfrigérant ou un signe annonciateur de fuite.
PCT/JP2003/010237 2002-08-14 2003-08-11 Refrigerateur WO2004016999A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002-236226 2002-08-14
JP2002236226A JP2004077000A (ja) 2002-08-14 2002-08-14 冷蔵庫

Publications (1)

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WO2004016999A1 true WO2004016999A1 (fr) 2004-02-26

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PCT/JP2003/010237 WO2004016999A1 (fr) 2002-08-14 2003-08-11 Refrigerateur

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JP (1) JP2004077000A (fr)
KR (1) KR100639716B1 (fr)
CN (1) CN100370198C (fr)
TW (1) TW574493B (fr)
WO (1) WO2004016999A1 (fr)

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KR100903815B1 (ko) 2005-04-07 2009-06-24 다이킨 고교 가부시키가이샤 공기 조화 장치의 냉매량 판정 장치
EP2110622A2 (fr) 2008-04-15 2009-10-21 Liebherr-Hausgeräte Lienz GmbH Appareil de réfrigération et/ou de refroidissement
CN101469928B (zh) * 2007-12-26 2011-07-27 财团法人工业技术研究院 节能控制方法及其装置
WO2020014279A1 (fr) * 2018-07-09 2020-01-16 Crane Payment Innovations, Inc. Détecteur de fuite de réfrigérant pour distributeur automatique
EP3660431A4 (fr) * 2017-08-28 2020-10-21 Samsung Electronics Co., Ltd. Réfrigérateur et son procédé de commande
US11441820B2 (en) 2018-09-06 2022-09-13 Carrier Corporation Refrigerant leak detection system

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JP2009264660A (ja) * 2008-04-24 2009-11-12 Toshiba Corp 冷蔵庫
JP2010203658A (ja) * 2009-03-03 2010-09-16 Hitachi Appliances Inc 氷供給装置及び氷供給装置を備えた冷蔵庫
JP2011021851A (ja) * 2009-07-17 2011-02-03 Toshiba Carrier Corp 冷凍サイクル
JP5619664B2 (ja) * 2011-03-31 2014-11-05 ホシザキ電機株式会社 製氷機
JP5766006B2 (ja) * 2011-04-26 2015-08-19 ホシザキ電機株式会社 製氷機の運転方法
GB2528215B (en) * 2013-06-18 2018-08-01 Mitsubishi Electric Corp Refrigerating apparatus
JP5812081B2 (ja) * 2013-11-12 2015-11-11 ダイキン工業株式会社 室内機
JP6825336B2 (ja) * 2016-11-30 2021-02-03 ダイキン工業株式会社 冷凍装置
JP7085405B2 (ja) * 2018-05-15 2022-06-16 三菱重工サーマルシステムズ株式会社 熱源システム、制御装置、熱源システム運転方法及びプログラム
JP7201466B2 (ja) * 2019-02-07 2023-01-10 ホシザキ株式会社 冷却貯蔵庫
JP7215919B2 (ja) * 2019-02-07 2023-01-31 ホシザキ株式会社 冷却貯蔵庫

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JP2001093039A (ja) * 1999-09-22 2001-04-06 Sanden Corp 自動販売機
JP2001116419A (ja) * 1999-10-22 2001-04-27 Matsushita Refrig Co Ltd 冷蔵庫
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100903815B1 (ko) 2005-04-07 2009-06-24 다이킨 고교 가부시키가이샤 공기 조화 장치의 냉매량 판정 장치
US8215121B2 (en) 2005-04-07 2012-07-10 Daikin Industries, Ltd. Refrigerant quantity determining system of air conditioner
CN101469928B (zh) * 2007-12-26 2011-07-27 财团法人工业技术研究院 节能控制方法及其装置
EP2110622A2 (fr) 2008-04-15 2009-10-21 Liebherr-Hausgeräte Lienz GmbH Appareil de réfrigération et/ou de refroidissement
EP2110622A3 (fr) * 2008-04-15 2012-01-18 Liebherr-Hausgeräte Lienz GmbH Appareil de réfrigération et/ou de refroidissement
EP3660431A4 (fr) * 2017-08-28 2020-10-21 Samsung Electronics Co., Ltd. Réfrigérateur et son procédé de commande
US11397041B2 (en) 2017-08-28 2022-07-26 Samsung Electronics Co., Ltd. Refrigerator and controlling method thereof
WO2020014279A1 (fr) * 2018-07-09 2020-01-16 Crane Payment Innovations, Inc. Détecteur de fuite de réfrigérant pour distributeur automatique
US11662128B2 (en) 2018-07-09 2023-05-30 Crane Payment Innovations, Inc. Refrigerant leak detector for a vending machine
US11441820B2 (en) 2018-09-06 2022-09-13 Carrier Corporation Refrigerant leak detection system

Also Published As

Publication number Publication date
KR20050042153A (ko) 2005-05-04
TW574493B (en) 2004-02-01
CN1675510A (zh) 2005-09-28
JP2004077000A (ja) 2004-03-11
TW200402523A (en) 2004-02-16
CN100370198C (zh) 2008-02-20
KR100639716B1 (ko) 2006-11-01

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