WO2009113308A1 - Réfrigérateur - Google Patents

Réfrigérateur Download PDF

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Publication number
WO2009113308A1
WO2009113308A1 PCT/JP2009/001108 JP2009001108W WO2009113308A1 WO 2009113308 A1 WO2009113308 A1 WO 2009113308A1 JP 2009001108 W JP2009001108 W JP 2009001108W WO 2009113308 A1 WO2009113308 A1 WO 2009113308A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
food
infrared sensor
refrigerator
cooling
Prior art date
Application number
PCT/JP2009/001108
Other languages
English (en)
Japanese (ja)
Inventor
堀尾好正
田中正昭
足立正
井下美桃子
豆本壽章
Original Assignee
パナソニック株式会社
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
Priority claimed from JP2008157758A external-priority patent/JP2009300053A/ja
Priority claimed from JP2008234697A external-priority patent/JP2010038524A/ja
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to CN2009801089058A priority Critical patent/CN101970961B/zh
Priority to EP09718682.9A priority patent/EP2267388B1/fr
Publication of WO2009113308A1 publication Critical patent/WO2009113308A1/fr

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    • 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
    • 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
    • F25D2400/30—Quick freezing
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/16—Sensors measuring the temperature of products

Definitions

  • the present invention relates to a refrigerator using a non-contact sensor.
  • the air temperature in the refrigerator is measured with a thermistor or the like.
  • the thermistors installed in the refrigerator are used to measure this temperature.
  • the amount of cooling was adjusted by measuring the temperature of the air in the cabinet heated by the influence of hot food.
  • the food is cooled to the target temperature while cooling the surroundings, so that it may take time for the food itself to cool to the target temperature.
  • a non-contact infrared sensor is installed in the cabinet, or a load sensor that is installed under the case where food is placed and directly measures the food temperature is used to detect the actual food temperature and perform cooling operation.
  • a load sensor that is installed under the case where food is placed and directly measures the food temperature is used to detect the actual food temperature and perform cooling operation.
  • FIG. 12 is a side longitudinal sectional view of the refrigerator described in Patent Document 1
  • FIG. 13 is a partially enlarged side sectional view.
  • the interior of the refrigerator main body 1 formed of a heat insulating box is the storage space.
  • the refrigerator compartment 2 is arranged in the upper part
  • the vegetable compartment 6 is arranged in the lower part
  • the freezer compartment 8 is arranged in the lowermost part.
  • the switching room 9 is illustrated between the refrigerator compartment 2 and the vegetable compartment 6 through a heat insulating partition wall.
  • the ice making chambers are juxtaposed to the left and right, and a dedicated door is provided at the front opening of each storage chamber so as to be freely opened and closed.
  • a freezing cooler 14 such as a freezing room 8, a switching room 9, an ice making room, and a cooling blower fan 16 that circulates the cold air generated by the freezing cooler 14 into the storage room are arranged, Further, a refrigeration cooler 15 for cooling the refrigerator compartment 2 and the vegetable compartment 6 and a fan (not shown) are provided at a position in front of the freezer cooler 14.
  • the compressor 17 installed at the lower part of the main body and the refrigerant are shown.
  • the refrigerant is supplied to the refrigeration and refrigeration coolers 14 and 15 alternately or simultaneously by switching control of the flow path switching valve, and the cooled cold air is cooled by the cooling air blower fan 16 on the refrigeration temperature zone side and the refrigeration temperature zone side. Air is sent to the storage room, and each is cooled to a predetermined temperature.
  • the low-temperature cold air discharged from the refrigeration cooler 14 is diverted to the freezing room 8, the ice making room, and the switching room 9 by the cooling blower fan 16, and is blown and cooled through dedicated ducts.
  • cold air is blown out into the room from the cold air outlet 20, and the temperature of the food 21, which is a load cooled by this cold air, is detected by the infrared sensor 28 attached to the ceiling surface and set in advance.
  • the amount of cold air introduced into the room is adjusted by controlling the operation of the refrigeration cycle so as to reach a temperature, and opening / closing control of a cold air damper 32 installed in the vicinity of the cold air outlet 20, so that the food 21 that is a food has a predetermined set temperature. It is controlled as follows.
  • FIG. 14 is a perspective view showing the storage room of the refrigerator described in Patent Document 2
  • FIG. 15 is a front view showing the freezer room of the refrigerator described in Patent Document 2.
  • control is performed to avoid unnecessary quick freezing operation by determining the quick freezing time according to the magnitude of the load of the input food.
  • the temperature of the target food is detected by the load temperature sensor 39 provided in the lower part of the case 41 of the food placement unit, and the control for automatically starting or ending the quick freezing is performed.
  • efficient cooling operation control is performed by performing a cooling operation of only a necessary amount when necessary.
  • the temperature detected by the infrared sensor 28 installed on the ceiling portion of the switching chamber 9 detects the temperature of the food 21 when the door is closed, and detects the detected food 21.
  • the cold air generated by the refrigeration cooler 14 is controlled to be opened and closed by the cold air damper 32 according to the temperature of the air to adjust the amount of cold air introduced into the room.
  • the food 21 is controlled to have a predetermined set temperature.
  • the infrared sensor 28 detects the heat insulating partition on the projection plane that is out of the food 21.
  • the infrared sensor 28 Since this heat insulating partition is affected by temperature due to heat conduction from the lower vegetable compartment 6 and has a temperature different from that of the switching chamber 9, the infrared sensor 28 is a food cooled to the temperature equivalent to the switching chamber 9 Detect different temperatures. That is, the portion detected by the infrared sensor 28 undergoes a rapid temperature change when the door is opened. Specifically, when the conventional switching chamber 9 is installed at a freezing temperature and the door is opened only to check the food 21 stored in the switching chamber 9, the infrared sensor 28 detects the food 21 In order to erroneously detect the input temperature and start cooling, there is a problem that the switching chamber 9 is excessively cooled to require useless energy.
  • the infrared sensor 28 detects water droplets without detecting the food 21 when water droplets adhere to the tip portion due to condensation or the like, for example, the detection of the sensor tip is detected by the inflow of warm air from the outside when the door is opened or closed.
  • a shutter mechanism in the sensor part of the infrared sensor 28 in order to prevent dew condensation on the part
  • malfunction factors increase.
  • a complicated mechanical structure is likely to cause problems such as a decrease in the reliability of the mechanical structure due to a decrease in the lubricity of the lubricating oil or a failure. It will be prominent in the room.
  • Patent Document 2 Although the other conventional configuration in Patent Document 2 has a certain effect, it is insufficient for the needs for energy saving and the demand for improving the freshness of the refrigerator, which are the market interest in the recent global environment. It was.
  • the amount of cold air introduced into the freezer compartment 8 is increased by continuously operating the compressor and the cold air blowing fan, so that quick freezing is performed. Since the electric input of the refrigerator is greatly increased, the refrigeration speed is faster than normal cooling, but more energy is required, and it is difficult to perform quick freezing control with energy saving. It was.
  • the load temperature sensor 39 detects the temperature of the case 41 in contact with the food, and it is difficult to quickly detect the temperature of the food itself. For example, heat conduction from the food to the case 41 is performed, so that the food and the case itself can be detected. Since the temperature of the food is detected for the first time when the temperatures are almost the same, there is a problem that the detection time is delayed.
  • the present invention has been made to solve the above-described problems, and can eliminate erroneous detection of a non-contact sensor by a simpler method without using a complicated method, and is more accurate in a refrigerator storage chamber.
  • a non-contact sensor that detects a high temperature
  • a refrigerator capable of energy-saving and efficient cooling operation is provided.
  • the quick cooling of food that has been put into the warehouse is quickly and automatically started, and the rapid cooling that realizes further energy saving is performed, so that not only the energy saving is further improved, but also an easy-to-use refrigerator is provided.
  • JP 2007-212053 A Japanese Patent No. 3454522
  • the refrigerator of the present invention includes a heat insulation box constituted of a plurality of temperature zones by a plurality of heat insulation compartments, a storage room provided with a non-contact sensor that is insulated by the heat insulation boxes and detects the surface temperature of food, and storage
  • the storage room and the adjacent storage room are located in the same temperature zone or the storage room where the non-contact sensor is installed.
  • the adjacent storage room was assumed to have a lower temperature zone.
  • the non-contact sensor detects high temperature food near the same temperature as the storage room or lower temperature than the storage room. It is possible to suppress erroneous detection such as being inserted.
  • the refrigerator of the present invention can suppress false detection of the non-contact sensor even when there are no inclusions between the non-contact sensor and the partition wall of the adjacent storage room, the accuracy is higher and the higher A refrigerator provided with a non-contact sensor capable of detecting temperature of quality can be provided.
  • the refrigerator of the present invention has a storage room provided with a non-contact sensor that detects the surface temperature of the food placed on the food placement unit, cooling means for cooling the storage room, and cooling of the storage room is enhanced.
  • a quick freezing control means that performs cooling with a cooling capacity, and the food placement unit has a heat storage function, and if the temperature detected by the non-contact sensor is higher than a preset start temperature, a rapid cooling is performed with a high cooling capacity.
  • the quick freezing control is automatically started by the freezing control means and the quick freezing control by the quick freezing control means is stopped when the preset end temperature is reached.
  • the food temperature is detected by a sensor that detects non-contact, and quick freezing control is started automatically.When the end temperature is reached, the normal cooling operation is started immediately. Quickly and automatically start rapid cooling, and the food placement part has a heat storage function, so that the food placement part having a heat storage function cooled in the freezing temperature zone in advance is in contact with food. Because heat can be directly taken away by conduction and cooled quickly, the continuous operation time of the compressor and cold air blower fan can be greatly shortened even in the case of quick freezing control, which has realized further energy saving. Cooling can be performed.
  • the food placing portion when performing quick freezing control has a heat storage function, so that it has heat transfer by introducing cold air for quick freezing control and a heat storage function. Because it is possible to cool quickly using both the heat conduction from the food mounting part, the passage time through the maximum ice crystal formation zone of 0 ° C to -5 ° C, which greatly affects the freshness, especially in frozen storage Since it can be shortened and it passes through the maximum ice crystal formation zone in a short time, the amount of drip from the food can be suppressed when thawing, so it can be stored without sacrificing the freshness and taste of the food. It becomes possible to improve preservation quality.
  • the refrigerator of the present invention can eliminate erroneous detection of the non-contact sensor by a simpler method without using a complicated method, and can efficiently perform the cooling operation of the refrigerator.
  • FIG. 1 is a front view of a refrigerator according to the first embodiment, the fourth embodiment, and the seventh embodiment of the present invention.
  • FIG. 2 is a side cross-sectional view of the refrigerator according to the first embodiment, the fourth embodiment, and the seventh embodiment of the present invention.
  • FIG. 3 is a partially enlarged side sectional view of the upper freezer compartment in the first embodiment of the present invention.
  • FIG. 4 is a partially enlarged side sectional view of the upper freezer compartment in the second embodiment of the present invention.
  • FIG. 5 is a partially enlarged side sectional view of the upper freezer compartment in the third embodiment of the present invention.
  • FIG. 6 is a partially enlarged side cross-sectional view of the upper freezer compartment in the fourth embodiment of the present invention.
  • FIG. 1 is a front view of a refrigerator according to the first embodiment, the fourth embodiment, and the seventh embodiment of the present invention.
  • FIG. 2 is a side cross-sectional view of the refrigerator according to the first embodiment, the fourth embodiment, and the seventh embodiment of the present invention.
  • FIG. 7 is a partially enlarged side sectional view of the upper freezer compartment in the fifth embodiment of the present invention.
  • FIG. 8 is a partially enlarged side sectional view of the upper freezer compartment in the sixth embodiment of the present invention.
  • FIG. 9 is a partially enlarged side sectional view of the upper freezer compartment of the refrigerator according to the seventh embodiment of the present invention.
  • FIG. 10 is a partially enlarged side sectional view of a refrigerator according to the eighth embodiment of the present invention.
  • FIG. 11 is a side sectional view of a refrigerator according to the ninth embodiment of the present invention.
  • FIG. 12 is a side longitudinal sectional view for explaining a conventional refrigerator.
  • FIG. 13 is a partially enlarged side sectional view for explaining a refrigerator according to the prior art.
  • FIG. 14 is a perspective view showing a storage room of a refrigerator according to another prior art.
  • FIG. 15 is a front view which shows the freezer compartment of the refrigerator by another prior art.
  • the refrigerator of the present invention includes a heat insulation box constituted of a plurality of temperature zones by a plurality of heat insulation compartments, a storage room provided with a non-contact sensor that is insulated by the heat insulation boxes and detects the surface temperature of food, and storage A storage room adjacent to the projection line in the direction detected by the non-contact sensor, and the storage room where the non-contact sensor is installed and the adjacent storage room have the same temperature range or non-contact sensor
  • the adjacent storage room has a lower temperature zone than the installed storage room.
  • the non-contact sensor detects a temperature near the temperature of the storage room or lower than the temperature of the storage room, so that erroneous detection can be suppressed when the door is opened and closed.
  • the refrigerator of the present invention is such that the non-contact sensor is an infrared sensor, and the infrared sensor is installed in a relatively high temperature part in the storage room.
  • the temperature difference between the infrared sensor and the detected food can be made large, the amount of heat transferred by radiation increases, the amount of infrared detected by the infrared sensor increases, and noise from the infrared sensor and subtle temperature fluctuations, for example, Since the difference from noise due to temperature fluctuations during cooling by the circulation fan increases, it is easy to detect and the surface temperature of food can be detected with high accuracy.
  • the refrigerator of the present invention has an infrared sensor provided with a storage room having a temperature range higher than the temperature range of the adjacent storage room, and is installed in the vicinity of the storage room.
  • the refrigerator of the present invention is an infrared sensor that is installed in a heat-insulating partition section that insulates the storage room and the storage room.
  • the infrared sensor easily affected by the heat from the storage room, and it is possible to suppress condensation and frost formation and to suppress deterioration of accuracy. Furthermore, since the degree of exposure of the detection unit of the infrared sensor to the storage chamber can be suppressed, it is difficult to be affected by temperature fluctuations due to the cold air flowing in the warehouse, and the deviation of the detection temperature can be suppressed.
  • the refrigerator of the present invention has an infrared sensor whose tip is installed on the surface of the heat insulating partition or on the inner side of the surface.
  • the tip of the infrared sensor does not protrude, so foreign substances do not adhere to the detection part of the infrared sensor even when a large amount of food is put in the storage room or during cleaning, so detection malfunction does not occur. Moreover, since it does not protrude into the storage, the storage capacity can be secured.
  • the refrigerator of the present invention uses the temperature zone of the storage room in which the infrared sensor is installed as the freezing temperature zone, so that the temperature of the food to be detected and the reference temperature (thermistor temperature) of the infrared sensor As the temperature difference increases, the temperature can be detected with higher accuracy.
  • the refrigerator of the present invention has a viewing angle detected by the infrared sensor of 55 ° or less, and narrows the viewing angle of the infrared sensor to improve detection accuracy and prevent insufficient cooling. .
  • the temperature detection surface that detects the temperature with the infrared sensor also becomes larger, and the possibility of detecting a temperature other than the food installation surface or the presence of food other than the food to be detected on the temperature detection surface increases. . Thereby, the temperature other than the target food becomes noise and the accuracy may be reduced.
  • the viewing angle is narrowed to 55 ° or less, the accuracy reduction is suppressed.
  • the refrigerator of the present invention is provided with a mark smaller than the visual field range in the visual field range of the surface detected by the infrared sensor, and stores food in a range that can be reliably detected by the infrared sensor. can do.
  • the refrigerator of the present invention has a storage room provided with a non-contact sensor that detects the surface temperature of the food placed on the food placement unit, cooling means for cooling the storage room, and cooling of the storage room is enhanced.
  • a quick freezing control means that performs cooling with a cooling capacity, and the food placement unit has a heat storage function, and if the temperature detected by the non-contact sensor is higher than a preset start temperature, a rapid cooling is performed with a high cooling capacity.
  • the quick freezing control is automatically started by the freezing control means, and the quick freezing control by the quick freezing control means is stopped when the preset end temperature is reached.
  • the food temperature is detected by a sensor that detects non-contact, and quick freezing control is started automatically.When the end temperature is reached, the normal cooling operation is started immediately. Quickly and automatically start rapid cooling, and the food placement part has a heat storage function, so that the food placement part having a heat storage function cooled in the freezing temperature zone in advance is in contact with food. Since heat can be directly taken away by conduction and cooled quickly, the continuous operation time of the compressor and cold air blower fan can be greatly shortened even in the case of quick freezing control, which has realized further energy saving. Cooling can be performed.
  • the food placing portion when performing quick freezing control has a heat storage function, so that it has heat transfer by introducing cold air for quick freezing control and a heat storage function. Because it is possible to cool quickly using both the heat conduction from the food mounting part, the passage time through the maximum ice crystal formation zone of 0 ° C to -5 ° C, which greatly affects the freshness, especially in frozen storage Since it can be shortened and it passes through the maximum ice crystal formation zone in a short time, the amount of drip from the food can be suppressed when thawing, so it can be stored without sacrificing the freshness and taste of the food. It becomes possible to improve preservation quality.
  • the refrigerator can be cooled by a cooling operation as required.
  • the cooling in a short time with a high cooling capacity for example, the operation time in the 24 hours of operation of the refrigerator can be shortened, so the power consumption is reduced and the current global environment deterioration factor It is possible to reduce greenhouse gas emissions.
  • the temperature inside the cabinet rises due to the influence of the door opening.
  • the quick freezing control since the quick freezing control is not automatically entered in the past, the food is cooled over time with a low cooling capacity, but in the present invention, if the temperature is high, the temperature is automatically detected by the non-contact sensor.
  • the quick freezing control will be started, so it can be cooled quickly without taking time with high cooling capacity.
  • the cooling time for cooling can be shortened, and since the cooling is performed in a short time, the temperature rise of the food itself is suppressed, so that deterioration of the freshness can be suppressed.
  • the quick freezing control is automatically canceled when the food is frozen, it is possible to eliminate wasteful energy consumption due to unnecessary cooling operation after freezing as in the past.
  • some products detect the transition from latent heat change of food to sensible heat change and determine the completion of freezing, but the latent heat change and sensible heat change show the same amount of change depending on the size of the food. In some cases, it was difficult to judge.
  • freezing since the temperature of the food itself is detected, freezing can be reliably determined, and a complicated differential calculation control specification for calculating the change rate of the food as in the past is not constructed.
  • the non-contact sensor is an infrared sensor, and is provided on the wall surface of the storage chamber facing the food placement portion, and the storage chamber is only in the freezing temperature zone.
  • a freezer that can be set.
  • the detection accuracy of the infrared sensor generally has the characteristic that the detection accuracy deteriorates as it moves away from the temperature range where the highest accuracy is to be set. It can be set in advance so that the area near the belt is the highest, and since it is not set to any other temperature band, it is possible to detect the temperature of the food with high accuracy at all times, and quicker and more accurate quick freezing control It is possible to perform the start and end of the quick freezing control, and it is possible to perform the quick freezing control that realizes further energy saving.
  • the temperature range where the quick freezing control is automatically started by the quick freezing control means is a detected temperature of 0 ° C. to ⁇ 5 ° C. among the temperatures detected by the infrared sensor. Is included.
  • FIG. 1 is a front view of the refrigerator according to Embodiment 1 of the present invention.
  • FIG. 2 is a side sectional view of the refrigerator according to Embodiment 1 of the present invention.
  • FIG. 3 is a partially enlarged side sectional view of the upper freezer compartment in the first embodiment of the present invention.
  • the refrigerator main body 101 includes a metal (for example, iron plate) outer box 124, a hard resin (for example, ABS) inner box 125, and an outer box 124 and an inner box 125.
  • a heat insulating box 126 made of urethane heat insulating material 126 filled with foam between the refrigerator compartment 102 provided at the top of the main body, the upper freezer compartment 103 provided below the refrigerator compartment, and the bottom of the refrigerator compartment 102
  • the ice making chamber 104 provided in parallel to the upper freezing chamber 103, the vegetable chamber 106 provided in the lower part of the main body, and the upper freezing chamber 103 installed in parallel and the ice making chamber 104 and the vegetable chamber 106 were provided.
  • the lower freezer compartment 105 is configured.
  • the front portions of the upper freezing chamber 103, the ice making chamber 104, the lower freezing chamber 105, and the vegetable chamber 106 are closed freely by opening and closing doors 103a, 104a, 105a, and 106a, respectively, and the front surface of the refrigerator compartment 102 is opened with a double door. It is closed freely by a door 102a (not shown).
  • the refrigerator compartment 102 is usually set in a refrigeration temperature range of 1 to 5 ° C. with the lower limit being the temperature at which it does not freeze for refrigerated storage.
  • the vegetable room 106 is often set to 2 ° C. to 7 ° C., which is the same or slightly higher temperature as the refrigerator room 102. If the temperature is lowered, the freshness of leafy vegetables can be maintained for a long time.
  • the upper freezer compartment 103 is usually set in the freezing temperature range of -22 to -18 ° C for freezing storage, but depending on the user's preferred freezing storage state, it can save time for cooking such as thawing around -7 ° C It is also possible to set the soft freezing temperature range of -30 ° C to -25 ° C, which is lower than the normal freezing temperature range of -22 to -18 ° C. It may be set in the freezing temperature range.
  • the lower freezer compartment 105 is usually set at ⁇ 22 to ⁇ 18 ° C. for frozen storage, but is lower than the normal freezing temperature range of ⁇ 22 to ⁇ 18 ° C. to improve the frozen storage state. For example, it may be set in a low temperature freezing temperature range of ⁇ 30 to ⁇ 25 ° C.
  • the refrigerator compartment 102 and the vegetable compartment 106 are set at a plus temperature in the cabinet, they are called refrigerated temperature zones.
  • the upper freezer compartment 103, the lower freezer compartment 105, and the ice making room 104 are called freezing temperature zones because the interior is set at a minus temperature.
  • the top surface portion of the refrigerator main body 101 is provided with a machine room 119 provided with a dent in a step shape toward the back surface of the refrigerator main body 101, and is composed of a first top surface portion and a second top surface portion.
  • a flammable refrigerant is often used as a refrigerant for environmental protection.
  • these functional components can be arranged in the machine room.
  • the refrigerator compartment 102, the ice making compartment 104, and the upper freezer compartment 103 are partitioned by a first heat insulating partition 110.
  • ice making chamber 104 and the upper freezing chamber 103 are partitioned by a second heat insulating partition 111.
  • the ice making chamber 104, the upper freezing chamber 103, and the lower freezing chamber 105 are partitioned by a third heat insulating partition 112.
  • the second heat insulating partition part 111 and the third heat insulating partition part 112 are parts assembled after foaming of the refrigerator main body 101, expanded polystyrene is usually used as a heat insulating material, but in order to improve heat insulating performance and rigidity. Rigid foamed urethane may be used, and furthermore, a highly heat insulating vacuum heat insulating material may be inserted to further reduce the thickness of the partition structure.
  • the lower freezer compartment 105 and the vegetable compartment 106 are partitioned by a fourth partition 113.
  • a cooling chamber 123 is provided on the back surface of the refrigerator main body 101, and in the cooling chamber 123, a cooler 107 that generates fin-and-tube type cool air as a representative one is a heat insulating partition wall.
  • the rear part of the lower freezer compartment 105 including the rear area of the partition parts 111 and 112 is vertically arranged in the vertical direction.
  • the material of the cooler 107 is aluminum or copper.
  • the cold air generated by the cooler 107 is stored in each storage room of the refrigerator compartment 102, the ice making room 104, the upper freezer room 103, the lower freezer room 105, and the vegetable room 106 by a forced convection method.
  • a cool air blowing fan 116 for blowing air is disposed, and a radiant heater 134 made of glass tube is provided in a lower space of the cooler 107 as a defrosting device for defrosting the frost adhering to the cooler 107 and the cold air blowing fan 116 during cooling. It has been.
  • the defrosting device is not particularly specified, and a pipe heater in close contact with the cooler 107 may be used in addition to the radiant heater 134.
  • the cool air blowing fan 116 may be directly disposed in the inner box 125, it is disposed in the second partition portion 111 assembled after foaming, and the manufacturing cost is reduced by performing block processing of the parts. You can also.
  • the first heat insulating partition 110 that is the ceiling surface of the upper freezer compartment 103 has an adjacent storage chamber on the projection surface of the surface detected by the infrared sensor 128 that detects the temperature of the food 121. It is installed in the direction (downward in this embodiment).
  • a discharge port (not shown) through which the cool air generated by the cooler 107 is discharged at the upper back of the upper freezer compartment 103, and a return for returning the cool air circulating in the upper freezer compartment 103 to the cooler chamber 123 again.
  • a mouth (not shown) is provided.
  • the detection accuracy can be improved because the infrared sensor 128 is less susceptible to the influence of cold air discharged from the discharge port. Furthermore, when the tip of the infrared sensor 128 is inside or on the same surface as the surface of the heat-insulating partition, foreign matter adheres to the detection part of the infrared sensor 128 even when a large amount of food 121 is placed in the storage chamber or during cleaning. This will not cause malfunction of detection. Furthermore, since there is no catching at the time of cleaning due to protrusion into the chamber, it is possible to prevent parts from being lost due to excessive force load, displacement in the detection direction, and the like. Moreover, since it does not protrude into the storage, the storage capacity does not decrease and the capacity can be secured.
  • the case 127 in the storage room detected by the infrared sensor 128 is provided with a mark 133 indicating that it is within the visual field range that the infrared sensor 128 can detect, so that the customer can easily understand where the food 121 is placed.
  • the mark 133 is provided in a range smaller than the visual field range detected by the infrared sensor 128 so that the temperature can be reliably detected when the food 121 is stored.
  • the infrared sensor 128 since the infrared sensor 128 has the strongest infrared detection intensity at the center of the detection range and becomes weaker as it goes to the end of the detection range, it is preferable to mark the mark 133 with the center as a reference in order to improve detection accuracy.
  • the mark is in a state where the drawer type door 103a is opened. Since it is difficult to know where the user should place the food when throwing in the food, the user can place the food more accurately with the mark 133, and the detection accuracy of the infrared sensor 128 can be improved. It is.
  • the infrared sensor 128 detects a thermopile (not shown) at the tip of the infrared ray emitted from the range of the surface to be detected and converts it into an electrical signal.
  • a thermopile Around the thermopile, there is a probe (not shown) which is a light collecting member for narrowing the detection range of the infrared sensor 128, and further compared with the voltage of a thermistor (not shown) which is a reference temperature arranged on the substrate portion.
  • the temperature is detected by calculating the temperature of the detected object.
  • the infrared sensor 128 has the highest infrared detection intensity in the center of the detection range circle, and the detection intensity decreases toward the end.
  • the viewing angle of the thermopile is set to 55 ° or less (50 ° is illustrated in FIG. 3).
  • the infrared sensor 128 used in the present embodiment a thermopile composed of a large number of thermocouples formed on a silicon substrate was used. Furthermore, the material of the probe part is a molded product using alumina powder having excellent thermal conductivity, but if the material has excellent thermal conductivity, for example, molding in which ceramic powder such as magnesia powder or aluminum nitride powder is dispersed. Goods are also acceptable.
  • a resin type probe is used in the detection response of the infrared sensor 128, the response is delayed, but the specific gravity can be reduced, which is effective in reducing the weight. By reducing the thickness of the resin type probe, it is possible to improve the responsiveness slightly, and the volume can be reduced, so that environmental load can be reduced with less material. Thinning is the same for metal materials having excellent thermal conductivity.
  • the viewing angle becomes narrower, but the detection accuracy can be improved thereby.
  • the detection surface of the infrared sensor 128 is formed with a cold storage function, the temperature fluctuation of the detection surface itself is reduced, so that it is possible to detect more accurately when warm food is introduced. is there.
  • the refrigerator compartment 102 rises in temperature due to heat intrusion from outside air and door opening / closing, and the refrigerator compartment sensor (not shown) reaches or exceeds the startup temperature of the compressor 117, the compressor 117 is started. Cooling in the storage is started. While the high-temperature and high-pressure refrigerant discharged from the compressor 117 finally reaches a dryer (not shown) disposed in the machine room 119, heat is dissipated particularly in a condenser (not shown) or the outer box 124. A pipe (not shown) is cooled and liquefied by heat exchange with the air outside the outer box 124 and the urethane heat insulating material 126 in the warehouse.
  • the liquefied refrigerant is depressurized by the capillary tube 118, flows into the cooler 107, and exchanges heat with the internal air around the cooler 107.
  • the cold air subjected to heat exchange is blown into the cabinet by a nearby cool air blower fan 116 to cool the inside of the cabinet.
  • the refrigerant is heated and gasified to return to the compressor 117.
  • the inside of the refrigerator is cooled and the temperature of the freezer compartment sensor (not shown) becomes equal to or lower than the stop temperature, the operation of the compressor 117 is stopped.
  • Refrigerator performs cooling operation by repeating the above operation cycle.
  • the infrared sensor 128 detects the temperature of the case 127 or the temperature of the food 121 in the upper freezer compartment from the thermopile 129 attached to the top surface of the upper freezer compartment 103. Detected.
  • the infrared sensor 128 detects the case 127.
  • a third heat insulating partition 112 which is a partition wall that separates the storage chamber on the projection line in the direction detected by the infrared sensor 128 from the detection surface of the surface or the target food 121 and the storage chamber provided with the infrared sensor 128. Will be detected.
  • the adjacent storage chamber on the projection surface of the surface detected by the infrared sensor 128, that is, on the projection line in the direction detected by the infrared sensor 128, has a refrigeration temperature zone that is 20 ° C.
  • the temperature zone of the storage chamber sandwiching the third heat insulating partition 112 is set to the same temperature zone or a temperature zone lower than the storage chamber, so that the amount of change in the detected temperature is reduced and detected. It is possible to prevent unnecessary energy consumption such as increasing the number of rotations of the compressor 117 and increasing the number of rotations of the cool air blower fan 116 because unnecessary cooling capacity is required.
  • the non-contact sensor when the door is opened, the non-contact sensor includes the third heat insulating partition 112 that is the wall on the projection plane side. Because it detects the temperature near the same temperature as the storage room or lower than the storage room, the adjacent storage room will not be at a high temperature when the door is opened and closed, and the non-contact sensor will falsely detect that warm food has been introduced. It can be suppressed.
  • a door switch is attached and interlocked with the switch to grasp the situation at the time of opening and closing the door, and when the door switch is activated, the infrared sensor 128 is set to a specification that cannot be detected to prevent erroneous detection.
  • a door switch is provided and linked to control, resulting in a more complicated configuration.
  • this door switch and wiring for linking with the switch, etc. It is assumed that the addition of the control mechanism included will cause the cost to increase due to the cost increase due to the global rise in parts due to the shortage of raw materials.
  • the temperature of the food higher than the surrounding temperature is detected, and when the door is open, the temperature is lower than that of the storage room provided with the infrared sensor. Because it detects the temperature range or the freezing temperature that is the same temperature range, for example, even when the temperature rises temporarily with the opening of the door, if no warm food is actually put in, Since a rapid temperature drop can be detected, it is also possible to determine that automatic quick freezing is started only when the temperature gradient within a certain period of time is calculated and a threshold value is set and the threshold value is exceeded.
  • the infrared sensor 128 is disposed on the refrigerating chamber side in order to obtain the effect of preventing condensation by disposing the infrared sensor 128 in the heat insulating partition that partitions the storage chamber higher than the temperature of the adjacent storage chamber.
  • a shutter mechanism can be mounted as a countermeasure for preventing condensation as in the conventional example, but a complicated mechanism is required because it needs to be interlocked with the opening and closing of the door.
  • the infrared sensor 128 is installed in the storage room where the temperature is higher on average than the ambient temperature, so that it becomes difficult to attach moisture that causes aging deterioration, thereby extending the product life. Is effective.
  • the purpose is to detect the temperature of the food 121 by the infrared sensor 128.
  • the infrared sensor 128 detects the temperature of the food 121 and at the same time the temperature of the one within the visual field range of the infrared sensor 128. Therefore, the amount of infrared rays emitted from the wall surface of the storage room or the food 121 stored in the storage room is detected. Therefore, when the temperature of the detection surface of the infrared sensor 128 rises due to the inflow of warm air accompanying the opening and closing of the door, the detection accuracy of the infrared sensor 128 for detecting the temperature of the food 121 decreases, so the temperature of the detection surface of the infrared sensor 128 decreases.
  • the detection surface has a cold storage function.
  • the inner wall surface in the detection range can maintain a more constant temperature, which is a temperature increase due to a so-called disturbance other than the addition of the food 121. It is possible to prevent wasteful energy consumption due to excessive cooling of the storage chamber by erroneously detecting that food has been introduced due to inflow of warm air or the like, and automatically starting rapid cooling based on the erroneous detection.
  • a disturbance detection means that reliably detects the presence or absence of food input
  • a detection time for determining the input of food is provided, and a warm temperature is detected
  • the presence or absence of food can be determined.
  • the infrared sensor 128 when the infrared sensor 128 is installed in the storage chamber, in this embodiment, consideration is given to the surface of the sensor probe being disposed below the surface of the heat insulating partition. This prevents cold air from the cold air outlet on the back from excessively cooling the tip of the probe and reduces temperature fluctuations in detection. At the time of adhesion and cleaning, the tip of the infrared sensor 128 is caught on a finger or a towel that is a cleaning object, etc., so that there is a function of suppressing component omission and detachment due to excessive force action.
  • the infrared sensor 128 erroneously detects that the thermistor 131 that detects its own temperature causes excessive temperature fluctuations, it is desirable that the infrared sensor 128 be separated from the part where the thermal fluctuations are not affected by the temperature.
  • a pipe mainly composed of a metal material such as copper or iron is provided for heat dissipation and surface condensation prevention, and therefore, the distance from the pipe is 15 mm or more in this embodiment.
  • isobutane which is a flammable refrigerant with a low global warming potential
  • isobutane which is a hydrocarbon
  • This isobutane has a specific gravity approximately twice that at normal temperature and atmospheric pressure compared with air (at 2.04 and 300K). If isobutane, which is a combustible refrigerant, leaks from the refrigeration system when the compressor 117 is stopped, it leaks downward because it is heavier than air.
  • the amount of leakage may increase, but the upper freezer compartment 103 in which the infrared sensor 128 is disposed is installed above the cooler 107. Therefore, even if it leaks, it does not leak into the upper freezer compartment 103. Even if the refrigerant leaks into the upper freezer compartment 103, the refrigerant is heavier than air and stays in the lower part of the storage compartment. Therefore, since the infrared sensor 128 is installed on the top of the storage room, it is extremely low that the vicinity of the infrared sensor 128 becomes a flammable concentration.
  • FIG. 4 is a partially enlarged side sectional view of the refrigerator according to Embodiment 2 of the present invention.
  • the surface detected by the infrared sensor 228 provided in the upper freezer compartment 203 is only the container 227, and is positioned below the container 227.
  • the third heat-insulating partition portion that has been removed is eliminated.
  • the mark 133 is provided at a location where the infrared sensor 228 on the food placement surface can detect the temperature with the highest accuracy.
  • the upper freezer compartment 203 and the lower freezer compartment 205 are in substantially the same temperature range, even when the temperature of the lower freezer compartment 205 is detected when the door is opened, it is detected because it is in the same temperature range as the upper freezer compartment 203. There is an effect that the temperature fluctuation of the temperature can be further suppressed.
  • the food placing surface on which the food in the upper freezer compartment 203 is placed can be cooled from the lower side with the cold air that cools the lower freezer compartment 205, the food placing surface can be cooled by cold air from both the upper and lower sides. Since it is cooled, the temperature difference between the space above and below the food placing surface is further reduced, and in addition to the effect that the temperature fluctuation of the temperature detected by the infrared sensor can be further suppressed. In addition to the case where there is a third heat insulating partition, the cooling speed can be remarkably improved. In addition, it is known that the food 221 passes through the maximum ice crystal formation zone of 0 ° C. to ⁇ 5 ° C. for a short time when frozen, so that there is little destruction of cells, so the third heat insulating partition is eliminated and the food 221 is moved up and down. Cooling from is very effective for food preservation.
  • FIG. 5 is a partially enlarged side cross-sectional view of the refrigerator according to Embodiment 3 of the present invention.
  • an infrared sensor 328 is attached to a door portion that pulls out the upper freezer compartment 303, and when the door is opened and closed, the detected temperature and the like are transmitted to the control portion of the refrigerator main body 301 by radio.
  • a wireless data transmission method is described for the drawer door.
  • the wireless circuit can be reduced by arranging a transmission wiring in the door opening / closing operation portion. .
  • FIG. 1 described above is also a front view of the refrigerator in the fourth embodiment of the present invention.
  • FIG. 2 is a side sectional view of the refrigerator according to the fourth embodiment of the present invention.
  • FIG. 6 is a partially enlarged side sectional view of the upper freezer compartment in the fourth embodiment of the present invention.
  • the refrigerator main body 101 includes a metal (for example, iron plate) outer box 124, a hard resin (for example, ABS) inner box 125, and an outer box 124.
  • a heat insulating box body made of urethane heat insulating material 126 filled with foam between inner boxes 125, a refrigerating chamber 102 provided at the upper portion of the main body, an upper freezing chamber 103 provided under the refrigerating chamber, and a refrigerating chamber
  • An ice making chamber 104 provided in parallel with the upper freezer compartment 103 under the 102, a vegetable compartment 106 provided in the lower part of the main body, and between the upper freezer 103 and the ice making chamber 104 and the vegetable compartment 106 installed in parallel.
  • the lower freezer room 105 is provided. Front portions of the upper freezing chamber 103, the ice making chamber 104, the lower freezing chamber 105, and the vegetable chamber 106 are freely opened and closed by a drawer-type door (not shown), and the front side of the refrigerator compartment 102 is, for example, a double door type door not shown. Is closed freely.
  • the refrigerator compartment 102 is normally set at 1 to 5 ° C. with a lower limit of the temperature at which it does not freeze for refrigerated storage.
  • the vegetable room 106 is often set to 2 ° C. to 7 ° C., which is the same or slightly higher temperature as the refrigerator room 102. If the temperature is lowered, the freshness of leafy vegetables can be maintained for a long time.
  • the upper freezer compartment 103 is usually set in the freezing temperature range of -22 to -18 ° C for freezing storage, but depending on the user's preferred freezing storage state, it can save time for cooking such as thawing around -7 ° C It is also possible to set the soft freezing temperature range of -30 ° C to -25 ° C, which is lower than the normal freezing temperature range of -22 to -18 ° C. It may be set in the freezing temperature range.
  • the lower freezer compartment 105 is usually set in a freezing temperature range of ⁇ 22 to ⁇ 18 ° C. for frozen storage, but in order to improve the frozen storage state, for example, in a low temperature freezing temperature range of ⁇ 30 to ⁇ 25 ° C. Sometimes set.
  • the refrigerator compartment 102 and the vegetable compartment 106 are set at a positive temperature in the cabinet, they are generally called the refrigerator temperature zone, and the upper freezer compartment 103, the lower freezer compartment 105, and the ice making chamber 104 are set at a negative temperature. Therefore, it is called a freezing temperature zone as a general term.
  • the top surface portion of the refrigerator main body 101 is provided with a machine room 119 provided with a dent in a step shape toward the back surface of the refrigerator main body 101, and is composed of a first top surface portion and a second top surface portion.
  • a flammable refrigerant is often used as a refrigerant for environmental protection.
  • these functional components can be arranged in the machine room.
  • the refrigerator compartment 102, the ice making compartment 104, and the upper freezer compartment 103 are partitioned by a first heat insulating partition 110.
  • ice making chamber 104 and the upper freezing chamber 103 are partitioned by a second heat insulating partition 111.
  • the ice making chamber 104, the upper freezing chamber 103, and the lower freezing chamber 105 are partitioned by a third heat insulating partition 112.
  • the second heat insulating partition part 111 and the third heat insulating partition part 112 are parts assembled after foaming of the refrigerator main body 101, expanded polystyrene is usually used as a heat insulating material, but in order to improve heat insulating performance and rigidity. Rigid foamed urethane may be used, and furthermore, a highly heat insulating vacuum heat insulating material may be inserted to further reduce the thickness of the partition structure.
  • the center part of the 2nd heat insulation partition part 111 and the 3rd heat insulation partition part 112 is hollowed, and it leads to reduction of material by making it an air path.
  • the lower freezer compartment 105 and the vegetable compartment 106 are partitioned by a fourth partition 113.
  • a cooling chamber 123 covered with a cooling chamber cover 122 is provided on the back of the refrigerator main body 101, and specifically, provided on the back of the upper freezing chamber 103 or the lower freezing chamber 105.
  • a cooler 107 that generates fin-and-tube type cool air is representatively included in the lower freezing chamber including the rear regions of the second and third partition portions 111 and 112, which are heat insulating partition walls.
  • the material of the cooler 107 is aluminum or copper.
  • the cold air generated by the cooler 107 is stored in each storage room of the refrigerator compartment 102, the ice making room 104, the upper freezer room 103, the lower freezer room 105, and the vegetable room 106 by a forced convection method.
  • a cool air blowing fan 116 for blowing air is disposed, and a radiant heater 134 made of glass tube is provided in a lower space of the cooler 107 as a defrosting device for defrosting the frost adhering to the cooler 107 and the cold air blowing fan 116 during cooling. It has been.
  • the defrosting device is not particularly specified, and a pipe heater in close contact with the cooler 107 may be used in addition to the radiant heater 134.
  • the cooling chamber cover 122 is provided with ducts for blowing cold air from the cold air blowing fans 116 into the respective storage chambers, and the cooler 107 is cooled through the same discharge duct 434 to the upper freezing chamber 103 and the lower freezing chamber 105. It is blowing directly.
  • discharge duct 434 is located closest to the cooler 107 in the air path for sending the cold air to each storage room.
  • the front surface of the cooling chamber cover 122 is provided with a first discharge port 432 and a second discharge port 433 for discharging cold air to the upper freezing chamber 103 and the lower freezing chamber 105, respectively.
  • the flow rate of the second discharge port 433 is distributed according to the load ratio of the two rooms.
  • the discharge area of the upper freezer compartment 103 is about 3000 mm 2
  • the discharge area of the lower freezer room 105 is about 6000 mm 2
  • the flow rate ratio between the upper freezer room 103 and the lower freezer room 105 is about
  • the same temperature zone is configured by setting the ratio to 1: 2.
  • the distance between the outlet of the cool air blowing fan 116 that blows the cool air generated by the cooler 107 and the first discharge port 432 of the upper freezer compartment 103 and the second discharge port 433 of the lower freezer chamber 105 is set through the same duct. Equivalent. In this embodiment, the thickness is set to 100 mm, and each discharge cold air is set to the same temperature.
  • first discharge port 432 and the second discharge port 433 are the discharge port with the shortest distance from the cooler 107 and the second closest discharge port, the heat loss that has just come out of the cooler 107 is small. Since the cold air having the lowest temperature is discharged from the first discharge port 432 and the second discharge port 433, the cooling efficiency is higher, and the first discharge port 432 and the second discharge port 433 have substantially the same temperature. The cool air is discharged.
  • the cool air blowing fan 116 may be directly disposed in the inner box 125, it is disposed in the second partition portion 111 assembled after foaming, and the manufacturing cost is reduced by performing block processing of the parts. You can also.
  • the infrared sensor 128 is installed in the heat insulating partition, it is difficult to be affected by the cold air discharged from the first discharge port 432, so that the detection accuracy can be improved. Furthermore, when the tip of the infrared sensor 128 is inside or on the same surface as the surface of the heat-insulating partition, foreign matter adheres to the detection part of the infrared sensor 128 even when a large amount of food 121 is placed in the storage chamber or during cleaning. This will not cause malfunction of detection. Furthermore, since there is no catching at the time of cleaning due to protrusion into the chamber, it is possible to prevent parts from being lost due to excessive force load, displacement in the detection direction, and the like. Moreover, since it does not protrude into the storage, there is an advantage that the storage capacity does not decrease and the capacity can be secured.
  • the mark 137 may be attached with the center as a reference in order to increase detection accuracy.
  • the infrared sensor 128 detects the amount of infrared rays emitted from the range of the surface to be detected with a thermopile at the tip and converts it into an electrical signal. There is a probe around the thermopile, and temperature detection is performed by calculating the temperature of the detected object by comparing with the voltage of the thermistor which is the reference temperature arranged on the substrate portion.
  • the infrared sensor 128 has the highest infrared detection intensity at the center of the circle within the detection range, and the detection intensity becomes weaker toward the end.
  • the viewing angle of the thermopile is set to 50 ° due to the influence of the temperature of the section, which is a cause of erroneous detection.
  • the infrared sensor 128 used in the present embodiment a thermopile composed of a large number of thermocouples formed on a silicon substrate was used. Furthermore, the material of the probe part is a molded product using alumina powder having excellent thermal conductivity, but if the material has excellent thermal conductivity, for example, molding in which ceramic powder such as magnesia powder or aluminum nitride powder is dispersed. Goods are also acceptable.
  • a resin type probe is used in the detection response of the infrared sensor 128, the response is delayed, but the specific gravity can be reduced, which is effective in reducing the weight. By reducing the thickness of the resin type probe, it is possible to improve the responsiveness slightly, and the volume can be reduced, so that environmental load can be reduced with less material. Thinning is the same for metal materials having excellent thermal conductivity.
  • the refrigerator compartment 102 rises in temperature due to heat intrusion from outside air and door opening / closing, and the refrigerator compartment sensor (not shown) reaches or exceeds the startup temperature of the compressor 117, the compressor 117 is started. Cooling in the storage is started. While the high-temperature and high-pressure refrigerant discharged from the compressor 117 finally reaches a dryer (not shown) disposed in the machine room 119, heat is dissipated particularly in a condenser (not shown) or the outer box 124. A pipe (not shown) is cooled and liquefied by heat exchange with the air outside the outer box 124 and the urethane heat insulating material 126 in the warehouse.
  • the liquefied refrigerant is depressurized by the capillary tube 118, flows into the cooler 107, and exchanges heat with the internal air around the cooler 107.
  • the cold air subjected to heat exchange is blown into the cabinet by a nearby cool air blower fan 116 to cool the inside of the cabinet.
  • the refrigerant is heated and gasified to return to the compressor 117.
  • the inside of the refrigerator is cooled and the temperature of the freezer compartment sensor (not shown) becomes equal to or lower than the stop temperature, the operation of the compressor 117 is stopped.
  • Refrigerator performs cooling operation by repeating the above operation cycle.
  • the infrared sensor 128 detects the temperature of the case 127 or the food 121 in the upper freezer compartment from the thermopile of the infrared sensor 128 attached to the top surface of the upper freezer compartment 103. is doing.
  • the infrared sensor 128 detects the surface of the case 127. In other words, the temperature of the third heat insulating partition 112 that separates the storage room provided with the infrared sensor 128 and the adjacent storage room from the detection surface of the target food 121 is detected.
  • the detected temperature is abrupt because the surface of the third heat insulating partition 112 has a temperature difference due to heat conduction. It will change to higher.
  • the upper freezing chamber 103 and the lower freezing chamber 105 are cooled by the discharge cold air having the same temperature discharged through the same discharge duct 434, and the flow rate of the discharge cold air is the load amount of the upper freezing chamber 103 and the lower freezing chamber 105. Since the distribution is performed according to the ratio, the temperatures of the upper freezer compartment 103 and the lower freezer compartment 105 are in the same temperature range.
  • the third heat insulating partition 112 serving as the detection unit of the infrared sensor 128 has the same temperature as that detected when the door is closed. Misdetection of presence or absence is suppressed.
  • the predetermined temperature is maintained at least by the average temperature of the upper limit temperature and the lower limit temperature.
  • the upper limit temperature and the lower limit temperature of the upper freezer compartment 103 are less likely to differ from those of the lower freezer compartment 105.
  • the upper limit temperature and the lower limit temperature associated with temperature adjustment are substantially the same in the upper freezer compartment 103 and the lower freezer compartment 105, and erroneous detection of the infrared sensor 128 can be further suppressed, so that the infrared sensor 128 can be opened even when the door is opened.
  • the amount of change in the temperature detected by the compressor becomes small and the detection is shifted, and an unnecessary cooling capacity is required, so that the rotation speed of the compressor 117 is increased or the rotation speed of the cool air blower fan 116 is increased. Will not cause false positives.
  • the first outlet 432 of the upper freezer compartment 103 is installed so as to face in the front direction so that the cold air flows along the surface detected by the infrared sensor, and below the first outlet 432. Also has a downward discharge port 435 adjusted so that the cold air flows downward. Thereby, since the temperature difference between the detection part of the infrared sensor 128 and the thermistor (not shown) part can be reduced, it becomes difficult to be influenced by the ambient temperature other than the food 121 within the detection range, so that the food temperature can be detected with high accuracy.
  • the temperature detected by the infrared sensor 128 detects not only the food 121 but also the temperature of the portion other than the food 121 when there is a temperature difference with the thermistor in order to detect the amount of infrared rays in the detection surface and convert it to the temperature. Become. In this embodiment, since the temperature difference between the temperature of the detection surface other than the food 121 and the thermistor can be reduced, the infrared amount of the food 121 can be detected with high accuracy, and the temperature of the food 121 can also be detected with high accuracy.
  • the discharge cold air flows on the surface of the cooling chamber cover 122, in addition to improving the detection accuracy of the infrared sensor 128, the surface of the cooling chamber cover 122 due to the inflow of high humidity outside air by opening and closing the door.
  • the sublimation can be promoted by the low-humidity cold air generated and dehumidified by the cooler 107.
  • the temperature of the food higher than the surrounding temperature is detected, and when the door is open, the temperature is lower than that of the storage room provided with the infrared sensor. Because it detects the temperature range or the freezing temperature that is the same temperature range, for example, even when the temperature rises temporarily with the opening of the door, if no warm food is actually put in, Since a rapid temperature drop can be detected, it is also possible to determine that automatic quick freezing is started only when the temperature gradient within a certain period of time is calculated and a threshold value is set and the threshold value is exceeded.
  • thermopile detects the temperature of the condensed water. Further, when the door is closed and the cooling operation in the cabinet is started, the condensed water freezes, so that it becomes difficult for the thermopile to detect the temperature of the food until the frozen water droplets sublimate. Therefore, when designing the arrangement of the infrared sensor 128, it is possible to obtain the effect of preventing dew condensation by giving consideration to the arrangement in the heat-insulating partition part that separates the storage room higher than the temperature of the adjacent storage room. .
  • the refrigerator compartment side it is preferable to install on the refrigerator compartment side. Furthermore, it is better to arrange it near the door side which is the highest temperature part in the temperature distribution of the heat insulating partition.
  • a shutter mechanism can be installed as a countermeasure to prevent condensation as in the conventional example, but since it needs to be interlocked with the opening and closing of the door, a complicated mechanism is required, so the possibility of failure increases and it is installed in an actual refrigerator Difficult to do.
  • the infrared sensor 128 is installed in the storage room where the temperature is higher than the ambient temperature on average, thereby making it difficult for moisture to cause aging deterioration, thereby extending the product life. It is effective.
  • the infrared sensor 128 when the infrared sensor 128 is installed in the storage chamber, in this embodiment, consideration is given to the surface of the sensor probe being disposed below the surface of the heat insulating partition. As a result, the cold air from the first discharge port 432 on the back surface does not excessively cool the tip of the probe to reduce the temperature fluctuation of the detection, and in addition, when the food is stored in excess of the food storage amount The front end of the infrared sensor 128 is caught by a finger or a towel as a cleaning object at the time of catching, adhering foreign matter, or cleaning, so that there is a function of suppressing component omission and detachment due to excessive force action.
  • the infrared sensor 128 erroneously detects that the thermistor 131 that detects its own temperature causes excessive temperature fluctuations, it is desirable that the infrared sensor 128 be separated from the part where the thermal fluctuations are not affected by the temperature.
  • a pipe mainly composed of a metal material such as copper or iron is provided for heat dissipation and surface condensation prevention, and therefore, the distance from the pipe is 15 mm or more in this embodiment.
  • isobutane which is a flammable refrigerant with a low global warming potential
  • isobutane which is a hydrocarbon
  • This isobutane has a specific gravity approximately twice that at normal temperature and atmospheric pressure compared with air (at 2.04 and 300K). If isobutane, which is a combustible refrigerant, leaks from the refrigeration system when the compressor 117 is stopped, it leaks downward because it is heavier than air. In particular, when leaking from the cooler 107 having a large amount of refrigerant, the amount of leakage may increase, and it is particularly likely to leak into the storage chamber communicating with the front side of the cooler 107.
  • the upper freezer compartment 103 in which the sensor 128 is disposed is installed above the cooler 107, it does not leak into the upper freezer compartment 103 even if it leaks. Even if the refrigerant leaks into the upper freezer compartment 103, the refrigerant is heavier than air and stays in the lower part of the storage compartment. Therefore, since the infrared sensor 128 is installed on the top surface of the storage room, the possibility that the vicinity of the infrared sensor 128 becomes a flammable concentration is extremely low, so that the arrangement configuration is sufficiently safe.
  • the area of the food 121 is detected after the food is added, and the detection viewing angle of the infrared sensor 128 is adjusted according to the area of the food 121, thereby improving the accuracy. Can be achieved.
  • the viewing angle can be adjusted with a portion having a temperature difference from the surroundings as a detection target after the food 121 is introduced, the detection accuracy with higher cost performance than the detection of the food area can be improved.
  • the first outlet 432 of the upper freezer compartment 103 is installed so as to face in the front direction so that the cool air flows along the surface detected by the infrared sensor, and the first outlet
  • the downward discharge port 435 adjusted so that the cold air flows downward is also opened on the lower side of the outlet 432, but the first discharge port 432 installed to face the front direction is more forward. It may be arranged so that it extends and cools around the front side of the upper freezer compartment 103, and the downward discharge port 435 cools around the rear side. It becomes possible to cool uniformly. Further, in the case where the first discharge port 432 and the downward discharge port 435 are not provided at two locations, the first discharge port 432 is arranged slightly downward from the front. By doing so, it becomes easier for cold air to flow to the food placement surface and the temperature within the detection range of the infrared sensor 128 can be lowered, so that the detection accuracy when new food is introduced can be further increased. It becomes possible.
  • FIG. 7 is a partially enlarged side sectional view of the refrigerator according to the fifth embodiment of the present invention.
  • the temperature of the lower freezer compartment 105 is detected when the door is opened, thereby further suppressing temperature fluctuation of the detected temperature.
  • the lower freezing room 105 is a room, and the upper freezing room 103 and the lower freezing room 105 share the same discharge duct 434 as the same temperature zone and supply cold air in the same temperature zone. Therefore, the cool air from the discharge duct 434 is supplied to the upper freezer compartment 103 through the first discharge port 432, and the cool air from the discharge duct 434 is supplied to the lower freezer chamber 105 through the second discharge port 433.
  • first discharge port 432 and the second discharge port 433 are the discharge port with the shortest distance from the cooler 107 and the second closest discharge port, the heat loss that has just come out of the cooler 107 is small. Since the cold air having the lowest temperature is discharged from the first discharge port 432 and the second discharge port 433, the cooling efficiency is higher, and the first discharge port 432 and the second discharge port 433 have substantially the same temperature. The cool air is discharged.
  • first discharge port 432 and the second discharge port 433 are supplied with cold air at the same timing.
  • the upper freezer compartment 103 which is a storage room in which the infrared sensor 128 is installed
  • the lower freezer room 105 which is an adjacent storage room
  • the heat insulation partition part used as the detection part of a non-contact sensor becomes the same temperature as the part detected when the door is closed, the erroneous detection of the presence or absence of the food supply accompanying door opening / closing is suppressed.
  • the predetermined temperature in the storage chamber and the adjacent storage chamber is performed by controlling the discharge amount of the cool air to be discharged
  • the predetermined temperature is maintained at least by the average temperature of the upper limit temperature and the lower limit temperature.
  • the difference between the upper limit temperature and the lower limit temperature of the storage room and that of the adjacent storage room is less likely to occur.
  • the upper limit temperature and the lower limit temperature that accompany temperature control are also substantially the same in the storage room and the adjacent storage room, and erroneous detection of the non-contact sensor can be further suppressed.
  • the food 121 in the upper freezing chamber 103 can be cooled from the upper side by the cool air that cools the lower freezing chamber 105, it can be cooled from the lower side. It becomes possible to improve the cooling speed. Since the food 221 is known to undergo less cell destruction when passing through the maximum ice crystal formation zone of 0 ° C. to ⁇ 5 ° C. in a short time when frozen, it is insulated between the upper freezing chamber 103 and the lower freezing chamber 105. Cooling the food 121 from above and below by having the same temperature zone without having a partition portion can be said to be a very effective configuration for food preservation in an actual refrigerator because the freshness during freezing is greatly improved. .
  • FIG. 8 is a partially enlarged side sectional view of the refrigerator according to the sixth embodiment of the present invention.
  • a part having a larger cross-sectional area than the other part is provided in a part of the discharge duct 434, and warm air at the time of defrosting is retained to suppress inflow into the warehouse.
  • a portion having a large cross-sectional area in the discharge duct 434 is disposed above the cooler 307 and disposed above the discharge port 332 of the upper freezer compartment 303 so that warm air flows into the chamber. Was further reduced.
  • the defrosting efficiency in the cooling chamber 323 is increased, so that the defrosting time can be shortened and the power consumption can be reduced.
  • the cooling stop time in the warehouse can be shortened, the temperature rise of the food 321 can be suppressed.
  • FIG. 1 described above is also a front view of the refrigerator in the seventh embodiment of the present invention.
  • FIG. 2 described above is also a side sectional view of the refrigerator according to the seventh embodiment of the present invention.
  • FIG. 9 is a partially enlarged side sectional view of the upper freezer compartment of the refrigerator in the seventh embodiment of the present invention.
  • the refrigerator body 101 includes a metal (for example, iron plate) outer box 124, a hard resin (for example, ABS) inner box 125, an outer box 124, and a front opening.
  • a heat insulating box body made of urethane heat insulating material 126 filled with foam between inner boxes 125, a refrigerating chamber 102 provided at the upper portion of the main body, an upper freezing chamber 103 provided under the refrigerating chamber, and a refrigerating chamber
  • An ice making chamber 104 provided in parallel with the upper freezer compartment 103 under the 102, a vegetable compartment 106 provided in the lower part of the main body, and between the upper freezer 103 and the ice making chamber 104 and the vegetable compartment 106 installed in parallel.
  • the lower freezer room 105 is provided. Front portions of the upper freezing chamber 103, the ice making chamber 104, the lower freezing chamber 105, and the vegetable chamber 106 are freely opened and closed by a drawer-type door (not shown), and the front side of the refrigerator compartment 102 is, for example, a double door type door not shown. Is closed freely.
  • the refrigerator compartment 102 is normally set at 1 to 5 ° C. with a lower limit of the temperature at which it does not freeze for refrigerated storage.
  • the vegetable room 106 is often set to 2 ° C. to 7 ° C., which is the same or slightly higher temperature as the refrigerator room 102. If the temperature is lowered, the freshness of leafy vegetables can be maintained for a long time.
  • the upper freezer compartment 103 and the lower freezer compartment 105 are normally set at ⁇ 22 to ⁇ 18 ° C. for frozen storage, but are set at a low temperature of ⁇ 30 to ⁇ 25 ° C., for example, to improve the frozen storage state. Sometimes.
  • the refrigerator compartment 102 and the vegetable compartment 106 are set at a plus temperature in the cabinet, they are called refrigerated temperature zones.
  • the upper freezer compartment 103, the lower freezer compartment 105, and the ice making room 104 are called freezing temperature zones because the interior is set at a minus temperature.
  • the top surface portion of the refrigerator main body 101 is provided with a machine room 119 provided with a dent in a step shape toward the back surface of the refrigerator main body 101, and is composed of a first top surface portion and a second top surface portion.
  • a flammable refrigerant is often used as a refrigerant for environmental protection.
  • these functional components can be arranged in the machine room.
  • the refrigerator compartment 102, the ice making compartment 104, and the upper freezer compartment 103 are partitioned by a first heat insulating partition 110.
  • ice making chamber 104 and the upper freezing chamber 103 are partitioned by a second heat insulating partition 111.
  • the ice making chamber 104, the upper freezing chamber 103, and the lower freezing chamber 105 are partitioned by a third heat insulating partition 112.
  • the second heat insulating partition part 111 and the third heat insulating partition part 112 are parts assembled after foaming of the refrigerator main body 101, expanded polystyrene is usually used as a heat insulating material, but in order to improve heat insulating performance and rigidity. Rigid foamed urethane may be used, and furthermore, a highly heat insulating vacuum heat insulating material may be inserted to further reduce the thickness of the partition structure.
  • the center part of the 2nd heat insulation partition part 111 and the 3rd heat insulation partition part 112 is hollowed, and it leads to reduction of material by making it an air path.
  • the lower freezer compartment 105 and the vegetable compartment 106 are partitioned by a fourth partition 113.
  • a cooling chamber 123 covered with a cooling chamber cover 122 is provided on the rear surface of the refrigerator main body 101.
  • a cooler 107 that generates fin-and-tube type cool air is a heat insulating partition wall.
  • the second and third partition portions 111 and 112 are disposed on the back surface of the lower freezer compartment 105 in the vertical direction in the vertical direction.
  • the material of the cooler 107 is aluminum or copper.
  • the cold air generated by the cooler 107 is stored in each storage room of the refrigerator compartment 102, the ice making room 104, the upper freezer room 103, the lower freezer room 105, and the vegetable room 106 by a forced convection method.
  • a cool air blowing fan 116 for blowing air is disposed, and a radiant heater 134 made of glass tube is provided in a lower space of the cooler 107 as a defrosting device for defrosting the frost adhering to the cooler 107 and the cold air blowing fan 116 during cooling. It has been.
  • the defrosting device is not particularly specified, and a pipe heater in close contact with the cooler 107 may be used in addition to the radiant heater 134.
  • the cooling chamber cover 122 is provided with ducts for blowing the cold air from the cold air blowing fans 116 into the respective storage chambers, and the cooling air from the cooler 107 is directly blown to the upper freezing chamber 103 and the lower freezing chamber 105 through the ducts. Yes.
  • the cool air blowing fan 116 may be directly disposed in the inner box 125, it is disposed in the second partition portion 111 assembled after foaming, and the manufacturing cost is reduced by performing block processing of the parts. You can also.
  • the first heat insulating partition 110 that is the ceiling surface of the upper freezer compartment 103 has a food load on which the infrared sensor 128 that is a non-contact sensor that detects the temperature of the food 121 detects.
  • the adjacent storage chamber on the projection surface of the placement unit is installed in a direction (downward in this embodiment).
  • the infrared sensor 128 is provided on the wall surface of the storage chamber on the side facing the food placement unit, and the food placement unit includes the cold storage agent 142 having a heat storage function.
  • the part has a heat storage function.
  • a return port (not shown) is provided.
  • the infrared sensor 128 is installed in the heat insulating partition part, it is difficult to be affected by the cold air discharged from the first discharge port 132, so that the detection accuracy can be improved. Furthermore, by setting the tip of the infrared sensor 128 to the inside of the surface of the heat insulating partition, foreign matter may adhere to the detection part of the infrared sensor 128 even when a large amount of food 121 is placed in the storage chamber or during cleaning. There is no malfunction in detection.
  • the place where the food 121 is placed is easy for the customer to understand.
  • temperature detection can be reliably performed when the food 121 is stored.
  • the mark 137 may be attached with the center as a reference in order to increase detection accuracy.
  • the mark 137 is attached to the upper surface side of the cold storage agent 142.
  • the infrared sensor 128 detects the amount of infrared rays emitted from the range of the surface to be detected with a thermopile at the tip and converts it into an electrical signal. There is a probe around the thermopile, and temperature detection is performed by calculating the temperature of the detected object by comparing it with the voltage of a thermistor (not shown) which is a reference temperature arranged on the substrate part. Yes.
  • the infrared sensor 128 has the highest infrared detection intensity at the center of the circle within the detection range, and the detection intensity becomes weaker toward the end.
  • the viewing angle of the thermopile is set to 50 ° due to erroneous detection due to the influence of the part temperature. Therefore, the detection accuracy can be further improved by placing the above-mentioned mark 137 mainly in the center of the circle within the range detected by the infrared sensor.
  • the infrared sensor 128 used in the present embodiment a thermopile composed of a large number of thermocouples formed on a silicon substrate was used. Furthermore, the material of the probe part is a molded product using alumina powder having excellent thermal conductivity, but if the material has excellent thermal conductivity, for example, molding in which ceramic powder such as magnesia powder or aluminum nitride powder is dispersed. Goods are also acceptable.
  • a resin type probe is used in the detection response of the infrared sensor 128, the response is delayed, but the specific gravity can be reduced, which is effective in reducing the weight. By reducing the thickness of the resin type probe, it is possible to improve the responsiveness slightly, and the volume can be reduced, so that environmental load can be reduced with less material. Thinning is the same for metal materials having excellent thermal conductivity.
  • the refrigerator compartment 102 rises in temperature due to heat intrusion from outside air and door opening / closing, and the refrigerator compartment sensor (not shown) reaches or exceeds the startup temperature of the compressor 117, the compressor 117 is started. Cooling in the storage is started. While the high-temperature and high-pressure refrigerant discharged from the compressor 117 finally reaches a dryer (not shown) disposed in the machine room 119, heat is dissipated particularly in a condenser (not shown) or the outer box 124. A pipe (not shown) is cooled and liquefied by heat exchange with the air outside the outer box 124 and the urethane heat insulating material 126 in the warehouse.
  • the liquefied refrigerant is depressurized by the capillary tube 118, flows into the cooler 107, and exchanges heat with the internal air around the cooler 107.
  • the cold air subjected to heat exchange is blown into the cabinet by a nearby cool air blower fan 116 to cool the inside of the cabinet.
  • the refrigerant is heated and gasified to return to the compressor 117.
  • the inside of the refrigerator is cooled and the temperature of the freezer compartment sensor (not shown) becomes equal to or lower than the stop temperature, the operation of the compressor 117 is stopped.
  • the infrared sensor 128 detects the temperature of the case 127 or the temperature of the food 121 in the upper freezer compartment from the thermopile attached to the top surface of the upper freezer compartment 103. Yes.
  • the refrigerator performs a cooling operation by repeating the operation cycle as described above.
  • the food 121 when fresh food such as meat or fish is purchased at a supermarket or the like, or when food 121 such as hamburg is made and stored frozen at home, the food 121 is put into the upper freezer 103 and subjected to quick freezing. Conventionally, the food 121 has been rapidly frozen by manually entering the quick freezing control. However, performing the operation of manually entering the quick freezing control after the food 121 is put in is disadvantageous in that the work burden on the user increases.
  • some of them can determine the time until the quick freezing control is finished depending on the set temperature of the food 121.
  • the speed of freezing differs depending on the size and thickness of the food 121.
  • the food 121 is not frozen and may not pass through the maximum ice crystal formation zone.
  • the set temperature is low, the food 121 is frozen, but the cooling operation is not completed and the compressor 117 during rapid freezing is used at a high rotation speed. There is. Further, the temperature of the food 121 is cooled by the influence of the ambient temperature while the temperature of the quick freezing control for the input food 121 is being set. Since it has entered the crystal formation zone, the suppression of cell destruction may be delayed, which may adversely affect the freshness.
  • some of the conventional technologies detect the change from the latent heat change of the food 121 to the sensible heat change to complete the freezing and complete the quick freezing control.
  • the change rate of the sensible heat change Depending on the size and thickness of the food 121, the ratio of latent heat change and sensible heat change may be equivalent.
  • the rate of change due to sensible heat change is small, and when the thickness of the food 121 is thin, the rate of change due to sensible heat change is large. That is, the rate of change of the sensible heat of the food 121 is not constant, and in order to determine the completion of freezing based on the rate of change, the rate of change of the size of the food 121 must be set to the larger one.
  • the cooling operation is performed even if it is frozen, and extra cooling energy is used. Further, even if the cooling load state of the refrigerator varies depending on the operating state of the cold air blowing fan 116 and the opening / closing of a damper (not shown), there may be no difference in the change rate of the latent heat change and the sensible heat change. For example, in the case of this conventional example, the load amount for cooling the refrigerator compartment 102 and the vegetable compartment 106 is different from the load amount for cooling the freezer compartment 108, the ice making compartment 104, and the switching chamber 109.
  • the amount of infrared rays emitted from a load such as food is detected in the case 127 in the upper freezer compartment detected by the infrared sensor 128, and the temperature calculated from the amount of infrared rays is equal to or higher than a certain temperature (upper limit set temperature: T0). ),
  • the quick freezing control is automatically entered, and the quick freezing control is terminated when the temperature detected by the infrared sensor 128 after the setting of the quick freezing control is equal to or lower than a certain temperature (lower limit set temperature: T1). It is what I did.
  • the refrigerator increases the amount of refrigerant circulating by increasing the rotation speed of the compressor 117, and cooling The temperature of the vessel 107 is lowered. Further, by increasing the number of rotations of the cool air blower fan 116, the food 121 is quickly cooled by increasing the amount of cooling that circulates the cool air generated by the cooler 107 in the cabinet. After that, while continuously detecting the temperature of the food 121, after confirming the passage of the maximum ice crystal formation zone of 0 ° C to -5 ° C, when it reaches the lower limit set temperature T1, which is the end temperature, the quick freezing control is automatically ended.
  • the maximum ice crystal formation zone which affects the freshness of food preservation, can be passed quickly by normal cooling operation, and after passing through the maximum ice crystal formation zone, even if it is normally cooled, it has little effect on the deterioration of freshness. There is no such thing as normal operation.
  • T0 which is the start temperature of rapid freezing control, that is, the upper limit temperature
  • T1 which is the end temperature of rapid freezing control, that is, the lower limit temperature
  • the quick freezing control is automatically entered and the cooling capacity is automatically improved, so that the refrigerator can be cooled by a cooling operation as required.
  • the refrigerator With respect to the rise in the internal temperature due to the loading of the load and the cooling to the load that is to be quickly frozen, it has a higher capacity than the conventional operation of the compressor 117 with medium rotation and the cooling of the load slowly. Shorter cooling can save energy because the actual power consumption of the refrigerator can shorten the operation time.
  • the rotation speed of the compressor 117 is temporarily set to 80 Hz, and the rotation speed of the cool air blowing fan 116 is also set to about 3000 rotations / minute, so that the first and second discharge ports
  • the cold air of 132, 133 is rapidly frozen by reducing it to close to -40 ° C.
  • the time has been shortened by more than 30 minutes. An energy saving effect of 23% can be obtained.
  • the regenerator 142 in the case of the upper freezer compartment 103, in addition to the freezing effect in the heat transfer by the cold air of about ⁇ 40 ° C. generated by the cooler 107, the freezing agent is frozen. Since the freezing effect by the direct heat transfer from the cold storage agent 142, that is, heat conduction is also added, the time for passing through the maximum ice crystal formation zone is further shortened and the amount of drip from the food 121 when the food is thawed can be further reduced. The food preservation can be improved.
  • the food 321 is cooled by cooling from the cool storage agent 142 and the inside of the case 127 is kept at a lower temperature than the case where there is no cool storage agent 142, so that the food 121 can be cooled in a short time, so the cooling operation time of the refrigerator Reduction and energy saving can be achieved, and the freshness of the food 321 can be improved.
  • the cool storage agent 142 absorbs the heat load of the outside air inflow even when the food 121 is not charged or when the outside air flows in when the door is opened or closed. Temperature rise can be suppressed.
  • the effect of this embodiment is as follows from the viewpoint of energy saving and food preservation.
  • the food temperature is detected by a sensor that detects non-contact, and quick freezing control is started automatically, and when the end temperature is reached, normal cooling operation is started immediately.
  • the food placement unit has a heat storage function, so that the food placement unit having a heat storage function that has been cooled to a freezing temperature zone in advance is in contact with the food.
  • the continuous operation time of the compressor and cold air blower fan can be greatly shortened. It becomes possible to perform rapid cooling that realizes energy saving.
  • the food placing portion when performing quick freezing control has a heat storage function, so that it has heat transfer by introducing cold air for quick freezing control and a heat storage function. Because it is possible to cool quickly using both the heat conduction from the food mounting part, the passage time through the maximum ice crystal formation zone of 0 ° C to -5 ° C, which greatly affects the freshness, especially in frozen storage Since it can be shortened and it passes through the maximum ice crystal formation zone in a short time, the amount of drip from the food can be suppressed when thawing, so it can be stored without sacrificing the freshness and taste of the food. It becomes possible to improve preservation quality.
  • the quick freezing control is automatically entered, and when the food is frozen, the quick freezing control is automatically released.
  • waste of unnecessary energy due to unnecessary cooling operation after freezing can be eliminated, and further, further energy saving can be realized by forming the food placing portion with the cold storage agent 142. .
  • the quick freezing control is not automatically entered in the conventional case, the food 121 is cooled over time with a low cooling capacity.
  • the temperature is high, it is automatically set according to the temperature detected by the infrared sensor 128.
  • the quick freezing control will be started, so it can be cooled quickly without taking time with high cooling capacity.
  • the cooling time for cooling can be shortened, and since the cooling is performed in a short time, the temperature rise of the food itself is suppressed, so that deterioration of the freshness can be suppressed.
  • the compressor 117 is operated at a high speed, or the cooling capacity is increased by increasing the rotational speed or voltage of the cool air blower fan 116 in order to increase the amount of air sent to the inside of the cool air generated by the cooler 107.
  • the noise level has increased for a certain period of time, but in this embodiment, the quick freezing control is performed around 0 ° C to -5 ° C, which is the maximum ice crystal formation zone. The time can be shortened by 30 minutes or more with respect to the conventional quick freezing control time.
  • the upper limit and the lower limit temperature are set as the set temperatures for the quick freezing control.
  • a preliminary detection period of a certain time for example, 3 minutes
  • parts such as door switches that detect opening and closing of doors and parts such as harnesses are expensive due to rising global material costs and mineral shortages in recent years, and there is a concern that the addition of door switches will complicate control.
  • quick freezing control for example, the convenience of automatic quick freezing control can be clearly indicated by turning on a lamp during quick freezing control that is displayed to the user on the front door.
  • the rotation speed of the compressor 117 is temporarily increased mainly in the temperature detection period of the maximum ice crystal formation zone, but the upper limit of the rotation speed of the compressor 117 is determined by the outside air temperature.
  • pressure protection on the low pressure side of the compressor 117 can be performed.
  • the maximum rotation speed of the compressor 117 is 69 Hz.
  • the rotation speed of the conventional compressor 117 is 80 Hz. Has also been reduced.
  • isobutane which is a flammable refrigerant with a small global warming potential, is used as a refrigerant in recent refrigeration cycles from the viewpoint of global environmental conservation.
  • This isobutane which is a hydrocarbon, has a specific gravity approximately twice that at normal temperature and atmospheric pressure compared with air (at 2.04 and 300K). If isobutane, which is a combustible refrigerant, leaks from the refrigeration system when the compressor 117 is stopped, it leaks downward because it is heavier than air.
  • the amount of leakage may increase, but the upper freezer compartment 103 in which the infrared sensor 128 is disposed is installed above the cooler 107. Therefore, even if it leaks, it does not leak into the upper freezer compartment 103. Even if the refrigerant leaks into the upper freezer compartment 103, the refrigerant is heavier than air and stays in the lower part of the storage compartment. Therefore, since the infrared sensor 128 is installed on the top of the storage room, it is extremely low that the vicinity of the infrared sensor 128 becomes a flammable concentration.
  • the area of the food 121 is detected after the food is added, and the detection viewing angle of the infrared sensor 128 is adjusted according to the area of the food 121, thereby improving the accuracy. Can be achieved.
  • the viewing angle can be adjusted with a portion having a temperature difference from the surroundings as a detection target after the food 121 is introduced, the detection accuracy with higher cost performance than the detection of the food area can be improved.
  • FIG. 10 is a partially enlarged side sectional view of the refrigerator according to the eighth embodiment of the present invention.
  • the food placement portion that is, the cold storage agent 242 can be cooled from both the upper side and the lower side. it can.
  • the food 221 introduced into the upper freezer compartment 203 can be cooled from the lower stage with the cool air that cools the lower freezer compartment 205, so that the cooling speed is significantly increased in addition to the case where the third heat insulating partition 212 is provided. It becomes possible to improve. Since it is known that the food 221 passes through the maximum ice crystal formation zone of 0 ° C. to ⁇ 5 ° C. in a short time when frozen, there is little destruction of the cells. Cooling is very effective for food preservation.
  • the regenerator 242 in the case of the upper freezer compartment 203, in addition to the freezing effect in the heat transfer by the cold air of about ⁇ 40 ° C. generated in the cooler 207, the freezing Since the freezing effect by direct heat transfer from the cool storage agent 242, that is, heat conduction is also added, the time for passing through the maximum ice crystal formation zone is further shortened and the amount of drip from the food 221 at the time of thawing the food can be further reduced. The food preservation can be improved.
  • the food 221 is cooled by the cooling from the cold storage agent 242, and the inside of the container 227 is kept at a lower temperature than the case where there is no cold storage agent 242, so that the food 221 can be cooled in a short time, so that the refrigerator is cooled.
  • the operation time can be reduced to save energy, and the freshness of the food 221 can be improved.
  • the cool storage agent 242 since the cool storage agent 242 is arranged, the cool storage agent 242 absorbs the heat load of the outside air inflow even when the food 221 is not inserted or when the outside air flows in when the door is opened or closed. Temperature rise can be suppressed.
  • FIG. 11 is a side sectional view of a refrigerator according to the ninth embodiment of the present invention.
  • a freezing temperature zone including the upper freezing chamber 403 and the lower freezing chamber 405, and a freezing temperature zone including the refrigerating room 402 and the vegetable room 406, a freezing cooler 414 and a refrigerating cooler 415 having different evaporation temperatures. It was cooled with.
  • the food 421 introduced into the case 427 in which the regenerator 426 of the upper freezer compartment 403 having the infrared sensor 425 on the top surface is stored on the bottom surface is a cooling load for the freezing capacity of the freezing cooler 414 in the freezing temperature zone.
  • the temperature generated by the refrigeration cooler 414 can be lowered, and the temperature of the discharged cold air from the first and second outlets 432 and 433 can also be lowered, so that the food 421 can be frozen. Can be raised. As a result, the freezing time of the food 421 can be shortened, so that the amount of power consumption can be reduced.
  • the refrigerator according to the present invention sets the temperature zone of the surface to be detected when detecting the food temperature using the infrared sensor and the temperature zone on the extension line to the same temperature. Can be reduced.
  • the infrared sensor detects the temperature of the food put into the storage room where the infrared sensor is installed and automatically enters quick freezing control, automatically improving the cooling capacity mainly in the time zone of the maximum ice crystal formation zone, automatically Since the quick freezing control is canceled at, the cooling operation according to the load amount of the refrigerator can be performed, so that eco-friendly and highly efficient cooling is possible, and it can be applied to all refrigeration equipment for detecting food temperature.

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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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

L'invention porte sur un réfrigérateur comprenant : une chambre de stockage ayant un capteur à infrarouges qui détecte une température de surface des aliments; et une chambre de stockage adjacente commençant du capteur à infrarouges comme point de départ et adjacente à un plan de projection du plan de détection du capteur à infrarouges. La chambre de stockage et la chambre de stockage adjacente sont maintenues dans la même bande de températures de façon à améliorer la précision d'une température détectée lors d'une ouverture et d'une fermeture de porte. De plus, par la suppression des fluctuations de la condensation et de la température d'une thermistance qui peuvent provoquer une détection erronée, il est possible de détecter de façon stable la température des aliments.
PCT/JP2009/001108 2008-03-14 2009-03-12 Réfrigérateur WO2009113308A1 (fr)

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JP2008157758A JP2009300053A (ja) 2008-06-17 2008-06-17 冷蔵庫
JP2008-157758 2008-06-17
JP2008-179851 2008-07-10
JP2008179851 2008-07-10
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JP2023034788A (ja) * 2021-08-31 2023-03-13 アクア株式会社 冷蔵庫

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06185847A (ja) * 1992-12-18 1994-07-08 Matsushita Refrig Co Ltd 冷蔵庫
JP2002228353A (ja) * 2001-01-29 2002-08-14 Toshiba Corp 冷却調理室
JP2002235976A (ja) * 2001-02-09 2002-08-23 Toshiba Corp 冷蔵庫
JP3454522B2 (ja) 1992-03-27 2003-10-06 三洋電機株式会社 冷蔵庫の急速冷却制御装置
JP2005308294A (ja) * 2004-04-21 2005-11-04 Matsushita Electric Ind Co Ltd 冷凍冷蔵庫
JP2006308504A (ja) * 2005-05-02 2006-11-09 Ishizuka Electronics Corp 赤外線検出装置
JP2007212053A (ja) 2006-02-09 2007-08-23 Toshiba Corp 冷蔵庫
JP2008107069A (ja) * 2006-09-27 2008-05-08 Sanyo Electric Co Ltd 冷却貯蔵庫

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3800900B2 (ja) * 1999-09-09 2006-07-26 三菱電機株式会社 冷凍冷蔵庫、冷凍冷蔵庫の運転方法
JP2003075050A (ja) * 2001-09-05 2003-03-12 Toshiba Corp 冷蔵庫
CN100343602C (zh) * 2003-08-25 2007-10-17 乐金电子(天津)电器有限公司 有温度转换室的双开门电冰箱
JP2005201533A (ja) * 2004-01-15 2005-07-28 Matsushita Electric Ind Co Ltd 保存庫

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3454522B2 (ja) 1992-03-27 2003-10-06 三洋電機株式会社 冷蔵庫の急速冷却制御装置
JPH06185847A (ja) * 1992-12-18 1994-07-08 Matsushita Refrig Co Ltd 冷蔵庫
JP2002228353A (ja) * 2001-01-29 2002-08-14 Toshiba Corp 冷却調理室
JP2002235976A (ja) * 2001-02-09 2002-08-23 Toshiba Corp 冷蔵庫
JP2005308294A (ja) * 2004-04-21 2005-11-04 Matsushita Electric Ind Co Ltd 冷凍冷蔵庫
JP2006308504A (ja) * 2005-05-02 2006-11-09 Ishizuka Electronics Corp 赤外線検出装置
JP2007212053A (ja) 2006-02-09 2007-08-23 Toshiba Corp 冷蔵庫
JP2008107069A (ja) * 2006-09-27 2008-05-08 Sanyo Electric Co Ltd 冷却貯蔵庫

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CN114111162A (zh) * 2020-08-31 2022-03-01 青岛海尔电冰箱有限公司 冰箱及其控制方法
CN114111199A (zh) * 2020-08-31 2022-03-01 青岛海尔电冰箱有限公司 冰箱的控制方法
CN113608597A (zh) * 2021-08-10 2021-11-05 南京信息工程大学 一种基于温湿度自动调节的计算机设备
CN113608597B (zh) * 2021-08-10 2023-05-12 南京信息工程大学 一种基于温湿度自动调节的计算机设备

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EP2267388A4 (fr) 2012-05-23
EP2267388A1 (fr) 2010-12-29

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