JP5401866B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator with reduced power consumption.

Japan's energy consumption has increased about three-fold over the last 40 years, and in particular, since the late 1980s, household consumption has increased compared to the industrial sector. Household refrigerator among the energy consumption in these household accounted for 15.5% of power consumption in the household, household refrigerator of energy saving for the CO ₂ reduction is essential to produce a refrigerator Manufacturers have a major mission with social responsibility to provide consumers with energy-saving refrigerators.

  Among them, particularly in the Japanese refrigerator market, the arrangement configuration of storage rooms has been devised for the purpose of improving the usability of a plurality of storage rooms provided in the refrigerator (see, for example, Patent Document 1). .

  Hereinafter, the conventional refrigerator will be described with reference to the drawings.

  6 is a side longitudinal sectional view of the refrigerator described in Patent Document 1, and FIG. 7 is a partially enlarged side sectional view.

  The inside of the refrigerator main body 1 formed of a heat-insulated box is used as a storage space at the top of the refrigerator compartment 2, and below the refrigerator compartment 2, the vegetable compartment 6 that is generally the highest temperature zone in the storage compartment, the bottom The freezer compartment 8 is arranged independently, and the switching compartment 9 and an ice making room (not shown) are juxtaposed between the refrigerator compartment 2 and the vegetable compartment 6 via a heat insulating partition wall. A dedicated door is provided at each front opening of the chamber and is closed to be opened and closed.

  In the rear part of the vegetable room 6, a freezing cooler 14 that generates cold air for cooling the freezer room 8, the switching room 9, the ice making room, and the like, and cooling that circulates the cold air generated by the freezing cooler 14 into the storage room A compressor provided in the lower part of the main body is provided with a blower fan 16 and further provided with a refrigeration cooler 15 for cooling the refrigerator compartment 2 and the vegetable compartment 6 and a fan (not shown) in front of the freezer cooler 14. The refrigerant is supplied to the refrigeration and refrigeration coolers 14 and 15 alternately or simultaneously by switching of a flow path switching valve (not shown) of the drive 17 and the refrigerant, and the cooled cold air is supplied to the refrigeration temperature zone side by the cooling blower fan 16. Air is sent to each storage room on the refrigeration temperature zone side, and each is controlled to be cooled to a predetermined temperature.

The low-temperature cold air discharged from the freezer cooler 14 is diverted to the freezing room 8, the ice making room, and the switching room 9 set in the freezing temperature zone by the cooling blower fan 16, and is blown through the dedicated ducts. To be cooled.
JP 2007-212053 A

  However, in the above conventional configuration, since the freezer compartment 8 that is the freezing temperature zone is disposed at the lowermost portion, the lower surface side of the freezer compartment is in contact with the outside air through a heat insulating partition, and similarly to the freezer compartment 8. The ice making room and the switching room 9 set in the freezing temperature zone are arranged in separate compartments via the vegetable room.

  In such a storage room structure, since it is set to the lowest temperature zone, a large loss of thermal energy leaked through the heat insulating partition from the storage room in the freezing temperature zone that requires a large amount of energy when cooling. That is, since the lower surface side of the freezer compartment 8 is in contact with the outside air and the upper surface portion is in contact with the vegetable compartment 6 having the highest temperature zone, the low temperature energy of the freezing temperature is radiated to the outside air and the vegetable compartment by heat conduction. The ice making room and the switching room 9 are in contact with the storage room in the up-and-down direction but not in the outside air, but both are in the refrigeration temperature zone and in the vegetable room temperature zone higher than that, so Moreover, since the low temperature energy of the freezing temperature zone was radiated to the vegetable compartment 6 by heat conduction, there was a problem that energy loss occurred.

  Furthermore, the rear side of the vegetable room 6 which is set to 2 ° C. to 7 ° C., which is generally the highest temperature zone in the storage room and slightly higher than the refrigeration room 2, is about −30 ° C. to −40 ° C. Since the refrigeration cooler 14 and the refrigeration cooler 15 having a low temperature of about 0 ° C. are arranged, these low temperatures are transmitted to the vegetable compartment 6 by heat conduction, so that the temperature of the vegetable compartment is not lowered. Since the heater 21 as a heating source is provided in order to maintain the temperature, a large amount of energy is required as electric power for adjusting the temperature by the heater 21 and a high temperature heat leakage occurs in the cooling chamber, resulting in more energy loss. It also had the problem of becoming larger.

  In addition to the fact that a compressor, which is a heating source in the refrigeration cycle, is provided adjacent to the freezer compartment 8, hot air due to heat release from the compressor flows upward, whereby the rear side and side surfaces of the storage compartment There is also a problem that heat leakage is likely to occur from the storage chamber through the heat insulating material, and energy loss increases.

  The present invention provides a refrigerator that realizes energy saving by devising the arrangement configuration of the storage room and the refrigeration equipment with a focus on realizing a refrigerator that can be operated with energy saving and lower energy consumption. With the goal.

In order to solve the above-described conventional problems, the present invention provides a heat insulating box composed of a plurality of heat insulating compartments, a heat insulating partition that partitions the heat insulating box, a storage chamber partitioned by the partition, A cooling chamber provided with a single evaporator for generating cold air for cooling the storage chamber, and the freezing chamber set in the freezing temperature zone in the storage chamber is provided with adjacent storage chambers on both sides in the vertical direction The cooling chamber is provided on the back side of the freezing chamber, and a compressor is provided on the top surface of the upper storage chamber away from the partition and the heat insulating partition that partitions the cooling chamber, and the freezing chamber is provided in the lower storage chamber. A heating source for adjusting the temperature of the storage chamber is disposed on a wall surface not adjacent to the chamber, and a refrigeration return port for returning the cold air that has cooled the storage chamber in the freezing temperature zone across the center line in the left-right direction of the evaporator, and Cool storage room in refrigerated temperature zone By cold air is provided with a come refrigeration return port to return, it is to equalize the frosting to the evaporator.

  As a result, the freezer compartment set in the freezing temperature zone is a storage room in a lower temperature zone than the outside air without contacting the outside air on both sides in the vertical direction. Heat leakage due to heat exchange through the heat insulating partition can be further reduced, and energy required for cooling the refrigerator can be further reduced.

  In addition, since the compressor is provided on the upper side of the freezer compartment, hot air due to the heat released from the compressor is prevented from passing through the back side and the side surface of the freezer compartment, and from the storage compartment through the heat insulating material. The heat exchange can be further reduced, and the energy required for cooling the refrigerator can be further reduced.

  In addition, a compressor and a high-temperature heating source are arranged at locations away from the heat-insulating partition that surrounds the cooling, thereby further reducing heat leakage from cooling due to the location of the high-temperature heating source near the cooling. It is possible to reduce the energy required for cooling the refrigerator.

  The refrigerator of the present invention can further reduce the energy required for cooling the refrigerator. Therefore, the refrigerator which realized energy saving more can be provided to consumers.

Invention of Claim 1 cools the said heat insulation box which comprised the heat insulation box comprised by the several heat insulation division, the heat insulation partition part which partitions off the said heat insulation box, the storage room partitioned off by the said partition part, and the said storage room and a cooling chamber in which a single evaporator provided to generate cold air, the freezing chamber is set to the freezing temperature zone in the storage compartment is the freezing compartment with provided the adjacent storage room on both sides in the vertical direction The cooling chamber is provided on the back side of the wall, and a compressor is provided on the top surface of the upper storage chamber separated from the partition and the heat insulating partition that partitions the cooling chamber, and a wall surface that is not adjacent to the freezing chamber in the lower storage chamber Is provided with a heating source that adjusts the temperature of the storage chamber, and stores the refrigeration return zone and the refrigeration temperature zone where the cool air that has cooled the storage chamber in the freezing temperature zone returns via the center line in the horizontal direction of the evaporator. The cold air that cooled the room returned That by having a refrigeration return port, it is intended to equalize the frosting to the evaporator.

  As a result, the freezer compartment set in the freezing temperature zone is a storage room in a lower temperature zone than the outside air without contacting the outside air on both sides in the vertical direction. Heat leakage due to heat exchange through the heat insulating partition can be further reduced, and energy required for cooling the refrigerator can be further reduced.

  In addition, a heating chamber that adjusts the temperature of the compressor and the storage chamber is disposed at a location away from the heat insulating partition that surrounds the cooling, so that a high-temperature heating source is positioned in the vicinity of the cooling chamber. The heat leakage from can be further reduced, and the energy required for cooling the refrigerator can be further reduced.

The invention according to claim 2 is the invention according to claim 1 , in addition to the invention according to claim 1 , wherein the freezer compartment is formed in one compartment by a heat insulating partition, and the freezer compartment has a plurality of doors and a plurality of storage compartments. To form.

  As a result, by providing a plurality of doors in a freezer compartment formed by a single compartment, it is possible to open and close only the doors of the necessary storage space, and reduce the outflow of cold air and inflow of warm air when the doors are opened and closed. Therefore, the energy required for cooling the refrigerator can be further reduced.

According to a third aspect of the invention are those having a cooling chamber to a place other than the back of the invention in addition, the storage chamber which becomes the highest temperature zone in the storage compartment according to claim 1 or 2.

  Thereby, since the cooling chamber is not located on the back surface of the storage chamber that is in a high temperature zone, the heat leakage from the cooling chamber can be further reduced, and the energy required for cooling the refrigerator can be further reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a side sectional view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is an external perspective view of the refrigerator for explaining Embodiment 1 of the present invention, and FIG. 3 is Embodiment 1 of the present invention. 4 is a partially enlarged side cross-sectional view of the lower freezing chamber according to FIG. 4, FIG. 4 is a front view of the cooling chamber according to the first embodiment of the present invention, and FIG. 5 shows the operation of the compressor according to the first embodiment of the present invention. FIG.

  As shown in the figure, the refrigerator main body 101 is foamed between a metal (for example, iron plate) outer box 124 and a hard resin (for example, ABS) inner box 125, and between the outer box 124 and the inner box 125. A heat insulating box made of a heat insulating material 126 made of urethane, which is a filled heat insulating partition, and includes a refrigerating chamber 102 provided at the top of the main body, an upper freezing chamber 103 provided below the refrigerating chamber, and a refrigerating chamber An ice making chamber 104 provided in parallel to the upper freezing chamber 103 under the 102, a vegetable chamber 106 provided in the lower part of the main body, and between the upper freezing chamber 103 and the ice making chamber 104 and the vegetable chamber 106 installed in parallel. The lower freezer room 105 is provided. 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 a pull-out type door 103a, 104a, 105a, 106a, respectively, and the front surface of the refrigerating chamber 102 is For example, it can be freely opened and closed by a double door 102a.

  The refrigerator compartment 102 is normally set at 1 to 5 ° C. with the temperature that does not freeze for refrigerated storage as the lower limit. The vegetable room 106 is often set to a temperature setting of 2 ° C. to 7 ° C. that is the same as or slightly higher than that of the refrigerator room 102. If the temperature is lowered, the freshness of leafy vegetables can be maintained for a long time. Both 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 it is done. The upper freezer compartment 103 and the lower freezer compartment 105 each have a door 103a and a door 105a to form a plurality of storage compartments. However, the upper freezer compartment 103 and the lower freezer compartment 105 are formed into one compartment by a heat insulating partition. The interior space communicates without providing the heat insulating material 126, which is a heat insulating partition, between the chamber 103 and the lower freezing chamber 105, and functions as a separate storage chamber by being independent only as a storage space. doing.

  The refrigerator compartment 102 and the vegetable compartment 106 are called a refrigerator temperature zone because the inside of the refrigerator is set at a plus temperature. 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.

  In the present embodiment, a cold storage material 130 is provided on the door 103 a side of the upper freezer compartment 103.

  The top surface portion of the refrigerator main body 101 has 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. The refrigeration cycle includes a compressor 117 as a heating source for driving provided in the machine room 119, a condenser or a heat radiating pipe that radiates high-temperature and high-pressure refrigerant from the compressor, a capillary tube that is a decompressor, The cooler 107 which becomes low temperature is sequentially connected in a ring shape. Therefore, in the refrigeration cycle, the heating source that generates heat when it operates is the compressor 119, and the high-pressure side through which the refrigerant compressed in the compressor 119 and the compressor flows becomes the highest temperature. Since the refrigerant that has passed through the high-temperature compressor dissipates heat in the condenser, the condenser is at a lower temperature than the compressor.

  Further, the refrigerant is supplied to a refrigeration cycle in which a compressor 117, a dryer (not shown) for removing moisture, a heat-dissipating capacitor or heat-dissipating pipe 118, a capillary tube, and a cooler 107 are sequentially connected in an annular shape. Enclose and perform cooling operation. In recent years, a flammable refrigerant is often used as the refrigerant for environmental protection. In the case of a refrigeration cycle using a three-way valve or a switching valve, these functional parts 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.

  Further, the lower freezer compartment 105 and the vegetable compartment 106 are partitioned by a second partition 111.

  Since the heat insulating partition part is a part that is assembled after foaming of the refrigerator main body 101, foamed polystyrene 126 is usually used as a heat insulating material, but hard foamed urethane may be used to improve heat insulating performance and rigidity. A highly heat-insulating vacuum heat insulating material may be inserted to further reduce the thickness of the partition structure.

  Further, by securing the operating part of the door frame and making the shape of the heat insulating partition thin or abolished, a cooling air passage can be secured and the cooling capacity can be improved.

  A cooling chamber 123 is provided on the back surface of the refrigerator main body 101, and a cooler 107 that generates fin-and-tube type cool air is vertically long in the cooling chamber 123. It is arranged. The material of the cooler 107 is aluminum or copper.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  For example, when the refrigerator compartment 102 rises in temperature due to heat intrusion from outside air, door opening and closing, etc., and the refrigerator compartment sensor (not shown) 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.

  Next, the liquefied refrigerant is decompressed by the capillary tube, 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. Thereafter, the refrigerant is heated and gasified, and returns to the compressor 117. When 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 refrigerator performs a cooling operation by repeating the above operation cycle.

  In general, there is heat intrusion due to the warm air of the outside air flowing into the refrigerator when the door is opened in one of the heat intrusion into the refrigerator where the largest heat load is applied, that is, the amount of intrusion heat is large. In this embodiment, the upper freezer compartment 103 and the lower freezer compartment 105 have doors 103a and doors, respectively, after the heat insulating partition portion is formed in one compartment of the storage room that is in the freezing temperature zone. 105a and forming a plurality of storage compartments, it is possible to open and close only the door of the necessary storage space, and it is possible to reduce the outflow of cold air and the inflow of warm air when the door is opened and closed. The energy required for cooling the refrigerator can be further reduced, and having a plurality of doors in one heat insulating section in this way can reduce the amount of heat entering, so the amount of heat entering is low. Effects can be obtained as a unit.

  In the present invention, as one of the intrusion heat amount reducing means for reducing the intrusion heat amount when the door is closed, the following structure is used for the purpose of reducing the intrusion heat amount from the portion sealing the storage chamber and the door. did.

  As shown in FIG. 3, in the part where the door 105a of the lower freezer compartment 105 and the refrigerator main body 101 are engaged, a heat radiating pipe 118 is provided in order to prevent dew condensation in the engaging part. As an intrusion heat reduction means, in addition to reducing the intrusion of outside air, it is important to reduce the amount of intrusion heat from the heat radiating pipe 118.

  As an intrusion heat amount reducing means for reducing the amount of intrusion heat from the heat radiating pipe 118, it is in thermal contact with the heat radiating pipe 118 and a metal (for example, iron plate) outer box 124 closest to the inside of the storage chamber 105 for heat exchange. The distance X in the front-rear direction of the refrigerator between the heat radiating pipe thermal contact 118a and the inner side edge 124a of the outer box 124 is the distance Y between the inner side edge 124a of the outer box 124 and the inner edge 105a of the door 105. It is formed to be shorter.

  In other words, if the lead wires in the left-right direction of the refrigerator at the heat-dissipating pipe heat contact 118a, the inner end portion 124a of the outer box 124, and the inner end portion 105a of the door 105 are A, B, and C, The distance Y between B and C is larger than the distance X. As a result, by increasing the distance from the inner side edge part 124a where the heat of the heat radiating pipe 118 is thermally conducted to the metallic outer box 124 and the temperature is high, the inner side edge part 105a of the door 105 is increased. It is possible to reduce the amount of heat entering the inside from the inside end portion 124a, and this configuration enables energy saving of about 10 kWh / year in the actual refrigerator.

  Moreover, although the rigidity of the refrigerator main body 101 tends to be reduced by shortening the inner side edge portion 124a of the outer box 124 as described above, the outer box 124 and the inner box 125 are improved in order to improve the rigidity. Complicating the shape of the inner box 125 located on the inner side than the contact 124, for example, by providing a convex curved surface portion 125a and a concave curved surface portion 125b when viewed from the heat insulating material 126, Increased rigidity. That is, in the vicinity of the contact 124 between the outer box 124 and the inner box 125, the portion in contact with the heat insulating material 126 is made more rigid by making the shape of the inner box 125 more complicated than the outer box 124.

  Moreover, as an intrusion heat amount reducing means for reducing the amount of intrusion heat from the outside air, the gap dimension Z between the refrigerator 105 on the side in contact with the outside air and the gap dimension Z between the door 105a and the door 105 on the side inside the cabinet. By reducing ′ to 50% or less, more preferably to about 20% or less, it is possible to further reduce the amount of heat entering from outside air.

  Moreover, in this Embodiment, the freezer compartment set to the freezing temperature zone which becomes the lowest temperature in a storage room as an intrusion heat amount reduction means from the outside shall be equipped with the adjacent storage room on both sides in the up-down direction. Further, as a means for reducing the amount of heat entering from the outside, a compressor is provided on the upper side of the freezing room, which is the coldest storage room.

  As a result, the freezer compartment set in the freezing temperature zone is a storage room in a lower temperature zone than the outside air without contacting the outside air on both sides in the vertical direction. Heat leakage due to heat exchange through the heat insulating partition can be further reduced, energy required for cooling the refrigerator can be further reduced, and further, a compressor is provided on the upper side of the freezer compartment, The hot air generated by the heat released from the compressor can be prevented from passing through the back and sides of the freezer compartment, heat exchange from the storage compartment through the insulation can be further reduced, and the energy required for cooling the refrigerator can be further increased. Can be reduced.

  In addition, the cooling chamber 123 including the cooler 107 in which the cool air is at the lowest temperature includes a freezing temperature zone storage chamber formed in one compartment by the heat insulating partition including the upper freezing chamber 103 and the lower freezing chamber 105. Since these storage chambers are partitioned by the partition 112, the upper refrigeration is performed not only by the cool air from the cooling chamber 123 but also by heat radiation from the partition 112. Since the chamber 103 and the lower freezing chamber 105 are cooled, the cooling load can be further reduced to further reduce the energy required for cooling the refrigerator.

  Further, in the vicinity of the cooler 107 (for example, the upper space), a cold air blower fan 116 for blowing the cool air generated by the cooler 107 is disposed in each storage chamber by a forced convection method. A radiant heater 134 made of glass tube is provided as a defrosting device for defrosting frost adhering to the cooler 107 and the cold air blowing fan 116. The radiant heater 134 is at least partially provided in a recess provided in the heat insulating partition 111, and the defrosting device is not particularly specified. In addition to the radiant heater 134, the radiant heater 134 is in close contact with the cooler 107. A pipe heater may be used.

  In the present invention, the refrigeration return port 123a from which the cold air that has cooled the storage chamber in the freezing temperature zone returns via the center line 107a in the left-right direction of the cooler 107, and the cold air that has cooled the storage chamber in the refrigeration temperature zone returns. A refrigerated return port 123b is provided. Accordingly, the return cold air from the refrigeration return port 123b having a relatively high humidity but a small air volume and the return cold air from the refrigeration return port 123a having a low humidity but a large air volume are respectively returned to the other side of the cooler 107. As a result, it is possible to make the frost on the cooler 107 more uniform.

  The refrigeration return port 123a to which the cool air that has cooled the storage chamber in the freezing temperature zone returns and the cold air that has cooled the storage chamber in the refrigeration temperature zone are returned across the center line 107a in the left-right direction of the cooler 107. The configuration provided with the refrigeration return port 123b functions as a calorific value reducing means for reducing the calorific value in the refrigerator. Specifically, the defrosting cycle in which the radiant heater 134 as a defrosting device operates is lengthened. The defrosting frequency can be greatly reduced, and the defrosting operation that has been conventionally performed once every 12 to 13 hours can be performed once every 20 to 24 hours. Energy saving was achieved.

  In addition, the refrigeration return port 123a from which the cool air that has cooled the storage chamber in the freezing temperature zone returns and the cold air that has cooled the storage chamber in the refrigeration temperature zone are returned across the center line 107a in the left-right direction of the cooler 107. Since the structure provided with the refrigerated return port 123b makes the frost to the cooler 107 uniform, the air path resistance and the heat exchange efficiency when the cold air passes can be further improved. It also has a function as a means.

  In addition, as a means for improving the efficiency of the refrigeration cycle, the condensing function is achieved only by the condensing pipe 118 without providing a complicated meander-shaped condensing pipe and a condenser having a radiating fin, which are generally used in the present embodiment. . This is to dissipate heat while exchanging heat with the outer box 124 of the refrigerator main body 101, has a relatively meandering shape, can further reduce the flow resistance when the refrigerant flows through the condenser, and improves the efficiency of the refrigeration cycle. Can be improved.

  Furthermore, as a means for improving the efficiency of the refrigeration cycle, in the present embodiment, the compressor 117 is provided on the ceiling surface of the refrigerator main body 101, so that the refrigerator main body is not located in the upper part of the machine room 119 provided with the compressor 117. The heat radiation of the compressor 117 can be further promoted. In particular, in the compressor 117 of the low-pressure container type in which the inside of the sealed container of the compressor 117 is filled with the refrigerant before compression, the compressor is promoted by promoting the heat radiation from the sealed container. Since the temperature of the intake refrigerant that greatly affects the efficiency of the compressor can be reduced, the efficiency of the compressor can be further increased and the efficiency of the refrigeration cycle can be improved.

  Further, in addition to the low-pressure container type compressor 117 in which the inside of the hermetic container is filled with the refrigerant before compression, in the present embodiment, for example, the compressor at the time of cooling assuming a summer time at an outside temperature of 30 ° C. The number of revolutions is reduced from 42 HZ, which is generally used in the past, to 35 HZ. Thus, by reducing the number of revolutions during normal cooling in which the longest operation is performed, each revolution of the compressor, that is, every one compression operation. Therefore, it is possible to reduce the temperature loss of the compressor, thereby further improving the efficiency of the compressor and improving the efficiency of the refrigeration cycle. It becomes possible. In addition, according to the configuration of the present embodiment, it has become possible to reduce the refrigeration load by reducing the amount of heat entering from the outside and the amount of heat generated inside, so the maximum speed of the compressor 117 is 80HZ, Even when the rotational speed at an outside temperature of 30 ° C., which is a heavy load in summer, is rotated at half or less of the maximum rotational speed, sufficient cooling is possible, and significant energy saving can be achieved.

  Therefore, the compressor 117 is operated at a rotational speed of 1/2 or less of the maximum rotational speed during normal cooling including summer, and when a high load such as startup or quick freezing is applied. Can also be operated at the maximum number of revolutions, making it possible to realize a more energy-saving and reliable refrigerator.

  Further, in the present embodiment, only the rotation speed of the compressor is changed. However, for example, as shown in the schematic diagram of FIG. 5, the rotation speed of the compressor 117 is reduced and, for example, the rotation speed at a conventional outside air temperature of 30 ° C. If 42HZ is reduced to about 5/6 to 35HZ, and the number of repetitions of operation and stop is reduced to 3/5 or 1/2, which is smaller than 5/6 of the rotation speed ratio, the energy loss due to start / stop is reduced. It becomes possible to reduce and achieve further efficiency, and to realize a more energy-saving and highly reliable refrigerator.

  As described above, in the present invention, in order to reduce the energy consumption of the compressor, it is possible to operate at a reduced compressor speed, realizing a highly efficient operation with a reduced compression ratio and approximately 3% (with a refrigerator capacity of 550 L). Energy saving of Δ20 kWh / year was achieved in the refrigerator. Thus, devising and providing heat generation amount reduction means for the purpose of reducing the heat generation amount of the device that generates heat in the refrigerator is also an effective means for realizing energy saving in the actual refrigerator.

  The cool air blowing fan 116 that sends the cool air generated in the cooling chamber 123 to each storage chamber may be directly disposed in the inner box 125, but is disposed in a heat insulating partition portion assembled after foaming, and blocks parts. Manufacturing costs can be reduced by processing.

  Further, a vacuum heat insulating material 226 having high heat insulating performance is arranged in addition to the normal urethane heat insulating material 126 around the back surface of the cooling chamber 123. In addition, in addition to the heat insulating material 126 made of normal urethane, the heat insulating compartment (the compartment including the storage compartment of the upper freezing compartment 103 and the ice making compartment 104 and the lower freezing compartment 105) that forms the freezing compartment is also used. A vacuum heat insulating material 226 having high heat insulating performance is disposed. As described above, the vacuum heat insulating material 226 is disposed only as a means for reducing the amount of intrusion heat in a portion where heat is exchanged through the storage room, the outside air, and the heat insulating material 126 in the lowest temperature zone.

  In this way, the vacuum heat insulating material 226 is arranged as a means for reducing the amount of intrusion only in the portion where the freezing room, which is the storage room having the lowest temperature zone, and the outside air exchange heat via the heat insulating material 126. In addition, in addition to preventing the amount of heat entering from the outside air, the heat insulating partition 110, 111 adjacent to the storage chamber is not provided with the vacuum heat insulating material 226, so that the amount of heat entering the freezer compartment becomes more uniform. Therefore, it is possible to provide a freezer room having a lower refrigeration quality.

  Furthermore, in the present embodiment, the doors are opened and closed at any of the doors of the heat insulating compartments (the compartments including the upper freezer compartment 103, the ice making compartment 104, and the lower freezer compartment 105) forming the freezer compartment. As an intrusion heat amount reducing means in this case, the upper storage chamber 103 is provided with a cold storage material 130. As a result, even when warm air enters the heat-insulating section forming the freezer compartment, it is possible to quickly absorb the amount of heat by the cool storage material 130 instead of cooling the warm air by operating the refrigeration cycle. The cold storage material 130 is not limited to be provided in the upper freezer compartment 103, but quickly absorbs the amount of heat of the warm air that has risen when the warm air enters the lower freezer compartment 105, which is the storage room in the largest freezing temperature zone. For this purpose, it is desirable to be provided on the top surface of the lower storage chamber 105 or on the upper side of the top surface.

  Further, in the present embodiment, in the front-rear direction of the refrigerator in the freezing compartment (the compartment including the upper freezer compartment 103, the ice making chamber 104, and the lower freezer compartment 105) which is a heat insulation compartment forming the freezer compartment, the rear side Since the cooling chamber 123 is provided on the front side and the doors 103a, 104a, and 105a are provided on the front side, the temperature distribution in the front-rear direction in the refrigeration compartment is closer to the front side closer to the door than the rear side closer to the cooling chamber 123. However, when the regenerator material 130 is provided on the door side, the temperature distribution can be made more uniform, and the freezing room can be more uniform in temperature and have higher freezing quality. Can be provided.

  In addition, since the vegetable room 106 is controlled in the temperature range where the temperature is the highest among the plurality of storage rooms, the temperature compensation heater 234 that is a heating source for adjusting the temperature of the storage room that has been generally used conventionally. The storage room in the freezing temperature zone is concentrated in the center in the vertical direction, so that the cooling room is not placed behind the vegetable room, greatly reducing the temperature compensation heater capacity in the vegetable room. It is installed only on one of the walls that are not adjacent to the wall. In the 110 L vegetable room 106, a heater with a heater capacity of 10 watts is operated at an operation rate of about 10%, which is half the conventional power consumption.

  As described above, in the present invention, first, a plurality of means are combined and implemented as means for reducing the amount of heat entering from the outside. To enumerate these intrusion heat reduction means, the freezer compartment set in the freezing temperature zone that is the lowest temperature in the storage room has a configuration in which adjacent storage rooms are provided on both sides in the vertical direction, and the storage room in the freezing temperature zone is the same. The upper freezer compartment 103 and the lower freezer compartment 105 are provided with a door 103a and a door 105a respectively to form a plurality of storage compartments, and the upper freezer compartment 103 and the upper freezer compartment 105 are formed above the freezer compartment. A compressor is provided on the side, the vacuum heat insulating material 226 is disposed only in a portion where heat is exchanged between the freezing room which is a storage room having the lowest temperature zone and the outside air via the heat insulating material 126, It is the structure of shortening the warehouse inner side edge part 124a of the outer box 124, and providing the cool storage material 130 which absorbs the heat | fever amount of warm air rapidly. By implementing all of these, it has become possible to provide a refrigerator with reduced operating energy of approximately 80 kWh / year.

  Moreover, in this Embodiment, it implements combining several means as a calorific value reduction means in a refrigerator. Enumerating these calorific value reducing means, the freezing return port 123a and the refrigerating temperature zone storage chamber to which the cool air that has cooled the refrigerating temperature zone storage chamber is returned across the center line 107a in the left-right direction of the cooler 107. The structure provided with the refrigeration return port 123b through which the cool air returns returns, the heat generation amount of the radiant heater 134 is significantly reduced by making the frosting balance of the cooler uniform, and the temperature compensation heater of the vegetable room The capacity is greatly reduced, and it is installed only at one of the wall surfaces not adjacent to the freezer compartment.

  By implementing all these calorific value reduction means, it has become possible to provide a refrigerator with reduced operating energy of about 40 kWh / year.

  Moreover, in this Embodiment, it implements combining several means as a refrigerating-cycle efficiency improvement means. To enumerate these refrigeration cycle efficiency means, it is possible to promote heat dissipation by providing the compressor 117 on the ceiling surface of the refrigerator main body 101, and the air path when cold air passes by making the frost on the cooler 107 uniform. In order to further improve resistance and heat exchange efficiency, to perform a condensing function only with the condensing pipe 118 without providing a complicated meander-shaped condensing pipe and a condenser having a radiating fin, and to suppress energy consumption of the compressor In addition, the compressor rotation speed is controlled to 35 Hz which is 1/2 or less of the maximum rotation speed 80 HZ even at an outside air temperature of 30 ° C. which is assumed to be summer.

  By implementing all of these refrigeration cycle efficiency improving means, it has become possible to provide a refrigerator with reduced operating energy of about 20 kWh / year.

  As described above, in the present embodiment, in order to further reduce energy saving during actual use of the refrigerator, intrusion heat amount reducing means for reducing the amount of heat entering from the outside of the refrigerator, and heat generation for reducing heat generation inside the refrigerator Combined volume reduction means and refrigeration cycle efficiency means for improving the cooling efficiency of the refrigerator, while maintaining reliability, realizes significant energy savings of about 140 kWh / year in refrigerators with a storage capacity of 550 L This is an invention that can realize a reduction in the power consumption of a home-use refrigerator-freezer that accounts for 15.5% of the energy consumed at home in Japan.

  As described above, the refrigerator according to the present invention further reduces power consumption. Thus, the present invention is not limited to a home refrigerator, and can be applied to a general refrigerator such as a commercial refrigerator or a vending machine.

Side surface sectional drawing of the refrigerator explaining Embodiment 1 of this invention External perspective view of a refrigerator for explaining Embodiment 1 of the present invention Partially enlarged side sectional view of the lower freezer compartment according to Embodiment 1 of the present invention The front view of the cooling chamber by Embodiment 1 of this invention The figure which shows the driving | operation of the compressor by Embodiment 1 of this invention. Side longitudinal sectional view illustrating a refrigerator according to the prior art Partially enlarged side sectional view illustrating a refrigerator according to the prior art

Explanation of symbols

101 Refrigerator body (insulation box)
102 Cold room (storage room)
103 Upper freezer room (storage room)
104 Ice making room (storage room)
105 Lower freezer compartment (storage room)
106 Vegetable room (storage room)
102a, 103a, 104a, 105a, 106a Door 107 Cooler 110, 111 Thermal insulation partition 117 Compressor 118 Radiation pipe

Claims (3)

A heat insulating box composed of a plurality of heat insulating compartments, a heat insulating partition that partitions the heat insulating box, a storage chamber partitioned by the partition, and a single evaporator that generates cold air that cools the storage chamber The freezing room set in the freezing temperature zone in the storage room is provided with adjacent storage rooms on both sides in the vertical direction, and the cooling room is provided on the back side of the freezing room. A compressor for the rear surface of the upper storage room separated from the partition and the heat insulating partition that partitions the cooling room, and heating for adjusting the temperature of the storage room on the wall surface not adjacent to the freezing room in the lower storage room source is arranged, come back cool air that has cooled the storage compartment of the refrigeration return port and refrigeration temperature zone cold air cooled is returned to the storage chamber of the respective freezing temperature zone across the center line in the lateral direction of the evaporator this equipped with a refrigeration return port In a refrigerator to equalize the frosting to the evaporator.   The refrigerator according to claim 1, wherein the freezer compartment is formed in one compartment by an insulating partition, and the freezer compartment includes a plurality of doors to form a plurality of storage compartments.   The refrigerator according to claim 1 or 2, further comprising a cooling chamber at a location other than the back surface of the storage chamber, which is the highest temperature zone in the storage chamber.