JP2017172847A - refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator which can maintain a cooling capacity by using a cold storage material and achieve energy saving.SOLUTION: A refrigerator includes a cooler 115 which cools a storage compartment by the operation of a compressor, and a cooling compartment accommodating the cooler 115. A cold storage material 131 is arranged in a return duct 102b of a storage compartment, and the cooler 115 is arranged adjacent to the cold storage material 131, so that a heat load of cool air returning to the cooler 115 is reduced, and a power consumption is reduced when a load amount is large due to daytime or opening/closing a door in real use.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a refrigerator provided with a cold storage material.

Conventionally, as a refrigerator provided with a cold storage material, a refrigerator for reducing power consumption has been proposed. (For example, see Patent Document 1)
Patent Document 1 has a normal operation in which the internal space of the box is partitioned by a partition wall, has a freezer compartment provided with a cold storage material inside, and performs a cooling operation so that the temperature in the freezer compartment becomes a predetermined first temperature; The cold storage operation is selectively performed so that the temperature in the freezer compartment becomes the second temperature lower than the first temperature, and the cold storage material has a freezing point that is lower than the first temperature and higher than the second temperature. It has been proposed to reduce peak power consumption by using a latent heat storage material that stores latent heat due to phase change as cold heat.

JP 2012-242064 A

  In the said conventional refrigerator, since a cool storage material is provided in the partition wall which comprises the inner wall face of a store room, the thickness of a partition wall becomes large and the internal volume of a store room decreases. In addition, if the partition wall has an uneven shape, the cold storage material has a problem that it has a complicated configuration in accordance with the shape.

  In order to solve the above conventional problems, the refrigerator of the present invention includes a storage room that is cooled by operation of a compressor, a cooling room that includes a cooler that cools the storage room, a regenerator material that changes phase, A refrigerator having a return duct in which cool air that has cooled the storage chamber returns to the cooler, wherein the cool storage material is disposed in the return duct, and the cooler is disposed in the vicinity of the cool storage material It is.

  As a result, when the load is applied at the time of loading and unloading food, cooling is performed with the cooling amount of the heat storage material and the cooler, so the temperature rise in the storage chamber is reduced, and the compressor is operated at a lower rotational speed than before. Therefore, the energy efficiency can be improved by improving the cooling performance while suppressing the operation due to the high rotation of the compressor.

  The refrigerator of the present invention can reduce power consumption during daytime during actual use or when there is a large amount of load due to door opening and closing.

Front view of a refrigerator according to an embodiment of the present invention The longitudinal cross-sectional view of the refrigerator of embodiment of this invention The figure which shows the structure of the principal part of the refrigerator of Embodiment 1 of this invention. The figure which shows the structure of the principal part of the refrigerator of Embodiment 1 of this invention. The figure which shows the structure of the principal part of the refrigerator of Embodiment 1 of this invention. The figure which shows the structure of the principal part of the refrigerator of Embodiment 1 of this invention. The figure which shows the structure of the principal part of the refrigerator of Embodiment 1 of this invention. The figure which shows the structure of the principal part of the refrigerator of Embodiment 1 of this invention. The figure which shows the temperature of the refrigerator of Embodiment 1 of this invention, the cool storage amount, and the change of compressor rotation speed Overview diagram of power change of Embodiment 1 of the present invention The figure which shows the structure of the principal part of the refrigerator of Embodiment 2 of this invention. The figure which shows the structure of the principal part of the refrigerator of Embodiment 3 of this invention. The figure which shows the structure of the principal part of the refrigerator of Embodiment 4 of this invention. The figure which shows the structure of the principal part of the refrigerator of Embodiment 4 of this invention. Vertical section of the refrigerator of Embodiment 5 of the present invention The figure which shows the refrigerating cycle of the refrigerator of Embodiment 5 of this invention.

  The invention according to claim 1 is a storage chamber that is cooled by operation of a compressor, a cooling chamber that includes a cooler that cools the storage chamber, a phase change cold storage material, and cold air that has cooled the storage chamber. Is a refrigerator having a return duct returning to the cooler, wherein the cool storage material is disposed in the return duct, and the cooler is disposed in the vicinity of the cool storage material. Is stored, and the temperature of the return cold air from the storage room can be lowered, so that the temperature rise of the cooler can be prevented.

  According to a second aspect of the present invention, the regenerator material is disposed in a return duct that is insulated from the cooling chamber, beside a cooling chamber constituting a cooler, and from the cooler to the regenerator material. The cold storage effect can be enhanced.

  According to a third aspect of the present invention, the storage room is a refrigeration room, the return duct is a duct for returning the cold air circulated through the cold room, the return cold air temperature of the cold room is lowered, and the contained moisture Can also be removed, so that frost on the cooler can be reduced.

  According to a fourth aspect of the present invention, the cold storage material is disposed in a stepped portion formed in the return duct, and the ventilation resistance in the cold storage material arrangement portion is suppressed, thereby reducing uneven frost. Plan.

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

(Embodiment 1)
1 is a front view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIGS. 3a to 3f are enlarged views of essential parts of the refrigerator compartment according to Embodiment 1. FIG. Fig. 5 is a control block diagram of the refrigerator in the same embodiment, and Fig. 5 is a control flowchart of the rapid cooling operation from detection of the input load of the refrigerator in the same embodiment.

  1 and 2, the refrigerator 101 includes a storage room divided into five parts, an upper stage, a middle stage, and a lower stage. Specifically, the upper storage room is a refrigerating room 102 having a double door at the front, a first freezing room 103 having a drawer door below, and an ice making room 105 having a drawer door in parallel therewith, The vegetable compartment 106 is provided with a drawer door disposed at the bottom, and the ice compartment 105 and the second freezer compartment 104 disposed between the vegetable compartment 106.

  Each door is illustrated as a refrigerator door 102a, a first freezer door 103a, a second freezer door 104a, an ice making door 105a, and a vegetable door 106a. The refrigerator compartment 102, the side-by-side ice making compartments 105, and the first freezing compartment 103 are partitioned vertically by a heat insulating partition wall 111. Further, the side-by-side ice making chamber 105, the first freezing chamber 103 and the second freezing chamber 104, and the second freezing chamber 104 and the vegetable chamber 106 are similarly partitioned vertically by the heat insulating partition wall 111.

  In addition, the refrigerator 101 formed by the heat insulating wall 110 filled between the outer box 108 and the inner box 109 partitions and forms a variable temperature chamber 107 as an independent storage room in the lower part of the refrigerator room 102 provided at the upper part. ing. The temperature changing room 107 is configured as a switching room. In the case of the present embodiment, the first temperature zone (chilled) in the refrigeration temperature zone near 0 ° C., the first temperature zone, and the freezing temperature of about −6 ° C. or less. It can be set to a second temperature zone (partial) of about −3 ° C., which is a temperature zone between the zone.

  Next, the configuration of the cooling system will be described. A cooling chamber 114 is formed behind the second freezing chamber 104 and has a cooler 115 inside. A defrost heater 122 is disposed below the cooler 115. Together with the compressor 112 installed in the upper machine room 113, a refrigeration cycle for cooling the refrigerator 101 is configured. The cooling chamber 114 is provided with a blower fan 116 that forcibly circulates the cool air exchanged by the cooler 115, and a damper device 117 a that distributes the cool air flowing into the refrigerating chamber 102, and a variable temperature chamber 107. A damper device 117b that distributes the cold air flowing in is disposed.

  Further, the cooling chamber 114 is partitioned forward and backward by a first freezing chamber 103 and a second freezing chamber 104 and a partition wall 123 disposed in front.

  In each storage room, the internal temperature of the refrigerator compartment 102 is about 2 to 3 ° C., the internal temperature of the vegetable compartment 106 is about 2 to 5 ° C., and the first freezer room 103 and the second freezer room 104. The internal temperature can be divided into about -18 to -20 ° C and the temperature zone. Thereby, by selecting a temperature range suitable for the preservation of food and storing the food, higher freshness and long-term preservation can be realized.

  1 and 2, the refrigerator 101 includes a storage room divided into five parts, an upper stage, a middle stage, and a lower stage. Specifically, the upper storage room is a refrigerating room 102 having a double door at the front, a first freezing room 103 having a drawer door below, and an ice making room 105 having a drawer door in parallel therewith, The vegetable compartment 106 is provided with a drawer door disposed at the bottom, and the ice compartment 105 and the second freezer compartment 104 disposed between the vegetable compartment 106.

  Each door is illustrated as a refrigerator door 102a, a first freezer door 103a, a second freezer door 104a, an ice making door 105a, and a vegetable door 106a. The refrigerator compartment 102, the side-by-side ice making compartments 105, and the first freezing compartment 103 are partitioned vertically by a heat insulating partition wall 111. Further, the side-by-side ice making chamber 105, the first freezing chamber 103 and the second freezing chamber 104, and the second freezing chamber 104 and the vegetable chamber 106 are similarly partitioned vertically by the heat insulating partition wall 111.

  In addition, the refrigerator 101 formed by the heat insulating wall 110 filled between the outer box 108 and the inner box 109 partitions and forms a variable temperature chamber 107 as an independent storage room in the lower part of the refrigerator room 102 provided at the upper part. ing. The temperature changing room 107 is configured as a switching room. In the case of the present embodiment, the first temperature zone (chilled) in the refrigeration temperature zone near 0 ° C., the first temperature zone, and the freezing temperature of about −6 ° C. or less. It can be set to a second temperature zone (partial) of about −3 ° C., which is a temperature zone between the zone.

Next, the configuration of the cooling system will be described. A cooling chamber 114 is formed on the rear rear side of the second freezing chamber 104, has a cooler 115 inside, and constitutes a refrigeration cycle for cooling the refrigerator 101 together with the compressor 112 installed in the upper machine chamber 113. To do. The cooling chamber 114 is provided with a blower fan 116 that forcibly circulates the cool air exchanged by the cooler 115, and a damper device 117 a that distributes the cool air flowing into the refrigerating chamber 102, and a variable temperature chamber 107. A damper device 117b that distributes the cold air flowing in is disposed. In each storage room, the internal temperature of the refrigerator compartment 102 is about 2 to 3 ° C., the internal temperature of the vegetable compartment 106 is about 2 to 5 ° C., and the first freezer room 103 and the second freezer room 104. The internal temperature can be divided into about -18 to -20 ° C and the temperature zone. Thereby, by selecting a temperature range suitable for the preservation of food and storing the food, higher freshness and long-term preservation can be realized.

  As shown in FIGS. 3a to 3f, the cooler 115 in the cooling chamber 114 includes a plurality of fins 124 and end plates 125 provided at both ends thereof, through which refrigerant pipes 126 are provided so as to meander in a plurality of stages. Is formed.

  In the cooling chamber 114, the front portion of the cooler 115 is constituted by a partition wall 123, and the partition wall 123 is heat-insulated in the lateral direction of the cooler 115. Next to the cooling chamber 114, a return duct 102b communicating with the return air path of the refrigerator compartment 102 is configured.

  The cooling chamber 114 and the refrigerating chamber return duct 102 b are arranged side by side by closing the front of the cooler 115 with the partition wall 123.

  The cold storage material 127 is formed of a resin case, and is disposed in a space between the side walls of the cooler 115 and both side walls of the cooling chamber 114. More specifically, a partition partition 114a that partitions the cooler 115 and the refrigerator return duct 102b is formed, and one side of the regenerator 127 is disposed between the partition partition 114a and the cooler 115, and the like. The cool storage material 127 on the side is disposed between the cooler 115 and the stepped portion 114 b constituting the cooling chamber 114 and the cooler 115.

  The cold storage material 127 is formed with a recess 127a that covers the U-shaped bent pipe 126a that is a part of the refrigerant pipe 126, and the locking means formed on the outer shell of the cold storage material 127 is locked to the U-shaped bent pipe 126a. Has been fixed.

  In addition, the regenerator material 127 is disposed above the defrost heater 122 disposed below the cooler 115. Then, the storage room is cooled by the latent heat or sensible heat of the cool storage material 127 and the cool heat of the cooler 115.

  Further, as shown in FIG. 3d, a U-shaped bent pipe 126a is inserted into the recessed portion 127a of the regenerator material, and the recessed portion 127a is formed independently for each U-shaped bent pipe 126a. Since the pipe 126a is individually covered, the cold energy of the cooler 115 is easily stored in the cool storage material 127. Further, a gap is formed between the concave portion 127a and the U-shaped bending pipe 126a so as not to contact.

  Further, as shown in FIG. 3e, the concave portions 127b of the cold storage material 127 into which the U-shaped bent pipes 126a formed at both ends of the cooler 115 are inserted are independent for each of the U-shaped bent pipes 126a arranged in a plurality of stages in the vertical direction. However, the recess 127b may be formed with a communication groove 127c that communicates from the upper U-shaped bent pipe to the lower U-shaped bent pipe.

  The operation | movement is demonstrated about the cool storage material 127 comprised as mentioned above.

  As shown in FIG. 4, during stable operation such as nighttime when door opening and closing is small and load is low, the compressor 112 is turned on and off repeatedly while operating at a low speed, and each storage room is set to a set temperature. It is cooling. At this time, the temperature of the cooler 115 is about −26 ° C., and the regenerator 127 is also cooled to the same temperature. The melting temperature of the cold storage material 127 is −22 ° C.

Then, at the time of the cooling operation in which the door opening / closing increases and the load is taken in and out, the cooling operation is performed by the latent heat of the cool storage material 127 and the cooler of the cooler as shown in FIG. By using the latent heat of the cold storage material 127, the rotation speed of the compressor 112 is controlled from low rotation to medium rotation operation. As a result, the high rotation operation of the compressor 112 during the power increase time period is suppressed, so that the electricity cost can be reduced.

  Moreover, since the temperature rise of the cooler 115 accompanying the load fluctuation can be reduced, the temperature fluctuation loss can be reduced. Then, after the cool storage material 127 is allowed to cool while maintaining the melting temperature, the temperature of the cool storage material 127 rises. However, since the cool storage material 127 is installed in the vicinity of the cooler 115, the cool storage material 127 starts from the cooler 115. The cold storage is performed while the rotation speed of the compressor 112 is kept at the medium rotation speed. The cold storage operation is performed while suppressing the rotation speed of the compressor 112, and energy efficiency can be improved.

  Then, the compressor 112 performs a cold storage operation while maintaining a medium rotation, and if the cool storage material 127 is cooled to a temperature substantially equal to the temperature of the cooler 115, the compressor 112 is operated at a low rotation. When the cooling operation is integrated for a predetermined time, the defrosting operation of the cooler 115 is started. At this time, the defrosting of the cooler 115 is started by the heat of the defrosting heater 122. The defrost water of the U-shaped bending pipe 126a is melted in the recess 127a and drained to the dew receiving tray 129.

  Further, by forming the regenerator material 127 as shown in FIG. 3e, the defrost water is guided to the lower part of the regenerator material 127 through the communication groove 127c without being accumulated in the recess 127b, and below the defrost heater 122 from the open portion 127d. Drainage to the arranged dew tray 129 can be improved. Therefore, a pool of water when frost formation has melted remains between the regenerator 127 and the cooler 115, and it is possible to suppress freezing and ice angle development again due to the cooling operation. Thereby, abnormal frost formation of the cooler 115 can be prevented.

  Moreover, as shown in FIG. 3 f, the recesses 127 e may be formed in the regenerator 127 so that the U-shaped bent pipes 126 a arranged at the left and right ends of the cooler 115 are entirely covered for each column. Thereby, the drainage of the defrost water generated between the cooler 115 and the regenerator material 127 can be further improved, and the frost residue can be reduced.

  Further, during stable operation at night, the compressor 112 is operated at a low speed, the damper device 117a of the refrigerator compartment 102 and the damper device 117b of the variable temperature chamber 107 are closed and cooled in a mode in which the freezer compartments 103 and 104 are circulated, and stored in cold storage. The material 127 may be efficiently cooled below the melting temperature (−22 ° C.).

  In addition, during stable operation at night, the cooling room is cooled by lowering the set temperature of the freezing room by 2 to 3 ° C. compared to the cooling operation with many doors opening and closing, the cold storage material 127 is stored below the melting temperature, and the doors are opened and closed frequently. You may make it reduce the compressor operation rate at the time of cold operation.

  Moreover, although the cool storage material 127 and the cooler 115 are arranged close to each other, they may be partially brought into contact with each other. By making it contact, it becomes easy to heat-transfer the cool heat of the cooler 115 to the cool storage material 127, so that the heat storage time can be shortened.

  Moreover, the cool storage material 127 may be formed with the metal case, and can transmit the cold heat of the cooler 115 to a cool storage material efficiently.

  Moreover, although the cool storage material 127 was arrange | positioned at the both sides of the cooler 115, you may arrange | position at least one side and may arrange | position in the side part of the cooler 115 near the refrigerator compartment return duct 102b in that case. Since the air volume of the refrigerating room return duct 102b is large, the side of the cooler 115 close to the refrigerating room return duct 102b is liable to form frost on the moisture contained in the return cold air, which may cause a decrease in heat exchange performance. By installing 127, cooling performance can be ensured.

  Further, if there is a freezer discharge damper (not shown) that adjusts the amount of cold air to the freezer chambers 103 and 104 and the ice making chamber 105, the operation of the compressor 112 is stopped when the freezer chambers 103 and 104 have reached an appropriate temperature. Then, the freezer discharge damper is closed, the fan 116 is operated, the refrigerating room damper 117a or the variable temperature storage damper 117b is opened and closed, and the latent heat or sensible heat of the cooler 115 and the cold storage material 127 is used to Since the cooling operation 107 is performed, the power consumption can be reduced.

(Embodiment 2)
FIG. 6 is a diagram illustrating a configuration of the regenerator material according to the second embodiment. The whole structure of the refrigerator is the same as that shown in FIGS.

  As shown in FIG. 6, the regenerator material 130 is disposed on the upper part of the cooler 115. Specifically, the recess is configured to cover the upper refrigerant pipe 126 of the cooler 115 from above. In the front view of the cooler 115, a refrigerator compartment return duct is formed on the right side, and the regenerator material 130 is closer to the left side than the central portion of the cooler 115 in the left-right width direction, that is, on the side close to the refrigerator compartment return duct. Rather, it is arranged on the opposite side and placed on one side of the cooler 115. Below the cooler 115 on the arrangement side of the cool storage material 130 is a cold air return port (not shown) that circulates through the vegetable compartment 106.

  The refrigerant pipe 126 includes a plurality of fins 124, but the refrigerant pipe 126 corresponding to the location of the regenerator material 130 has no fins, and the regenerator material 130 extends from the end plate 125 to the left-right width direction of the cooler 115. , Extending in a range not exceeding the projection position of the fan 116 and disposed substantially horizontally, locking means formed on the outer shell of the regenerator material 130 is locked and fixed to the refrigerant pipe 126. ing.

  The outer shell of the regenerator material 130 is formed so as to match the outer dimensions of the location where the fins 124 are disposed. Therefore, it is possible to prevent the partition wall 123 forming the front portion of the cooler 115 from being projected forward more than necessary, and the storage room space can be maintained.

  Operation | movement of the cool storage material 130 comprised as mentioned above is demonstrated.

  The cool storage material 130 disposed in the vicinity of the refrigerant pipe 126 of the cooler 115 is stored by the cool heat of the cooler 115, and the temperature rise in the refrigerator is reduced by the operation of FIGS. By reducing the power, daytime power can be reduced.

  In addition, since the cool storage material 130 is arranged on the return side of the vegetable room with a small air volume located on the far side, not on the side near the refrigerating room return duct 102b with a large air volume in the upper stage of the cooler 115, the air volume by the cool storage material 130 The cooling performance can be maintained by the cool storage material 130 and the cooler 115 without hindering the decrease in temperature and preventing the heat exchange of the return cold air containing a large amount of moisture returning from the refrigerator compartment.

(Embodiment 3)
FIG. 7 is a diagram illustrating a configuration of the regenerator material according to the third embodiment. The whole structure of the refrigerator is the same as that shown in FIGS.

As shown in FIG. 7, a cold storage material 131 is embedded in a refrigerating chamber return duct 102 b formed on the side of the cooler 115 in the cooling chamber 114. The refrigerator compartment return duct 102b is formed of a heat insulating material, and the cool storage material 131 is disposed on the surface of the inner box 109 constituting the refrigerator compartment return duct 102b communicating with the return air passage of the refrigerator compartment 102. Further, the regenerator material 131 has a height substantially equal to the height of the cooler 115 and is formed in a flat plate shape, and the arrangement portion of the inner box 109 constituting the duct surface so that there is no step with the refrigerating room return duct 102b. A stepped portion is formed and embedded. Moreover, the cool storage material 131 is stored cold by the operation | movement of FIGS.

  Operation | movement of the cool storage material 131 comprised as mentioned above is demonstrated.

  The cold air heat-exchanged by the cooler 115 is forcibly ventilated to each storage room by the fan 116, and the cold air discharged to the refrigerating room 102 circulates in the refrigerating room 102 and is returned to a return port (not shown) of the refrigerating room 102. It is sucked and passes through the refrigerator compartment return duct 102b formed on the back surface of the freezer compartment 104. The temperature of the return cold air is about 5 to 6 ° C., and the cool storage material 131 is divided on the left and right by the cooler 115 and the heat insulating wall in the vicinity, but communicates with the refrigerator return duct 102b and stores the cool storage at about −15 ° C. Has been. Although the latent heat may be used by using a regenerator material having a melting temperature of about −10 ° C., the cold air returning from the refrigerator compartment can be cooled using the sensible heat of the regenerator material 131.

  Therefore, when the cold air passes through the refrigerating room return duct 102b, it passes through the portion of the embedded cold storage material 131. Moisture contained in the return cold air can be absorbed by the cool storage material 131, and frost formation on the cooler 115 can be reduced when heat exchange with the cooler 115 is performed.

  Moreover, since the temperature of the return cold air heat-exchanged with the cooler 115 can be cooled by the cool storage material 131, the load amount to the cooler 115 can be reduced and the energy saving performance can be improved.

  In addition, the refrigerator compartment return duct 102b is disposed on the side of the cooler 115, and the defrost heater 122 is disposed below the cooler 115. Therefore, when the cooler 115 is defrosted, the frosted cold storage material 131 is formed. The defrosting can also be performed together, and clogging of the refrigerator compartment return duct 102b due to excessive frost formation can be prevented.

  Although the plate-shaped regenerator material 131 is used, the regenerator material 131 may be embedded in the entire duct surface by returning to a substantially square shape in order to promote heat exchange with the return cold air.

(Embodiment 4)
8a and 8b are diagrams showing the configuration of the cold storage material according to the fourth embodiment. The whole structure of the refrigerator is the same as that shown in FIGS.

  As shown in FIGS. 8 a and 8 b, a regenerator material 132 is disposed in the refrigerating room discharge duct 120. On the back surface of the refrigerator compartment 102, there are a duct cover 120 a and an inner box 109 that constitute the refrigerator compartment discharge duct 120, and a refrigerator compartment discharge duct 120 that forms an air passage surrounded by the duct cover 120 a and the inner box 109 is formed. Yes. A concave portion 109a is formed on the surface (duct side) of the inner box 109, and the flat plate-shaped regenerator material 132 is embedded in the concave portion 109a so that the duct surface does not protrude so as to reduce the air path resistance. ing. In addition, a cold air discharge port (not shown) to the variable temperature chamber 107 is formed in the cold room duct cover 120a at the lower part of the cold room 102. The regenerator material 132 is arranged on the back surface of the refrigerating chamber 102 upward from a position overlapping at least the discharge port of the variable temperature chamber 107 on the projection surface.

  Operation | movement of the cool storage material 132 comprised as mentioned above is demonstrated.

The cool air (about −15 ° C.) forcibly ventilated from the cooling chamber 114 by the fan 116 passes through the refrigerating chamber discharge duct 120, and the cool storage material 132 is cooled by the cool air of the cooler 115 by the operation of FIGS. 132 can be cooled and is cooled to about −10 ° C. Then, it is discharged as cold air of about 2 ° C. into the refrigerating chamber 102 together with the cold air cooled from the cold storage material 132. In particular, when the compressor 112 is stopped, the fan 116 is operated to close the freezer discharge damper (not shown) and cool the refrigerating chamber 102, thereby cooling the cooler 115 and the regenerator material formed on the back of the refrigerating chamber 102. Therefore, power consumption can be reduced.

  Moreover, since the cool storage material 132 is also extended and arranged on the back surface of the cool air outlet 107a of the variable temperature chamber 107, the variable temperature chamber 107 can be cooled to an appropriate temperature even when the compressor 112 is stopped by the cool air from the cool storage material 132. Can do.

  Further, by arranging the cold storage material 132 on the surface of the inner box 109, the temperature difference from the outside air is reduced by repeating the heat absorption and heat dissipation to the refrigerator compartment discharge duct 120, and acts as a heat insulating material. Can be reduced.

(Embodiment 5)
FIG. 9 is a diagram showing the configuration of the regenerator material according to the fifth embodiment. A cooling chamber 133 is formed behind the freezing chambers 103 and 104, and a cold storage chamber 135 is formed behind the cooling chamber 133 and the heat insulating wall 110 on the back surface. The cooling chamber 133 is provided with a cooler 115 and a first fan 134 that forcibly ventilates the cooler 115. A refrigerant pipe is wound around the outer periphery of the cool storage material 136 and the cool storage material 136 in the cool storage chamber 135. A second cooler 137 for cold storage is configured, and a second fan 138 that forcibly ventilates the stored cold heat is disposed above the cold storage material 136.

  The cooling chamber 133 and the cold storage chamber 135 are arranged in the front-rear direction, but the first fan 134 and the second fan 138 are arranged in the left-right direction (not shown). The return duct of each storage chamber communicates with the cooling chamber 133 and the cold storage chamber 135 so that heat is exchanged between the cooler 115 and the second cooler 137 for cold storage. Further, as shown in FIG. 10, the cooler 115 and the second cooler 137 for storing heat are arranged in parallel, and the refrigerant flow path can be switched by the switching valve 139.

  When the door load is small, such as at night, the refrigerant is circulated through the cooler 115 while the compressor 112 is operated at a low speed to cool the storage chambers. After switching, the refrigerant is circulated through the second cooler 137 for cold storage to store heat while the second fan is stopped. When the refrigerator compartment temperature exceeds the upper limit temperature, the freezer damper (not shown) is closed and the first fan 134 is operated to perform cooling. When the freezer temperature exceeds the upper limit temperature, the changeover valve 139 is switched so that the refrigerant circulates in the cooler 115 to cool the freezer compartments 103 and 104. In this way, the cold storage material 136 is stored cold at night when the load is small, and is cooled to the freezing point temperature (−22 ° C.) or lower or the ambient temperature.

  When the load amount that opens and closes the door increases, the compressor 112 is stopped and the second fan 138 is operated from the cold storage room 135, so that the refrigerator room 102, the variable temperature room 107, the vegetable room 106, and the freezing rooms 103 and 104 are moved. If it cools or the freezer compartments 103 and 104 are suitable temperature, the freezer compartment damper (not shown) with which the cool storage room was equipped will be closed, and the refrigerator compartment 102, the variable temperature room 107, and the vegetable compartment 106 will be cooled. In this way, the compressor 112 is stopped at the daytime power peak and the cool storage material 136 is allowed to cool, so that the electricity cost can be reduced.

  Further, the compressor 112 is not operated at a high rotation, but the refrigerant is circulated in the cold storage chamber 135 while being operated at a medium rotation, and the power consumption can be reduced by cooling by cooling the cold storage material.

  In addition, when the temperature of the regenerator material is higher than a predetermined temperature, the regenerator material temperature detection means (not shown) may be switched to an operation in which the refrigerant is circulated through the cooler 115 and each storage chamber is cooled by the cooling chamber 133.

Further, although the cooling chamber 133 is disposed in the front and the cool storage chamber 135 is disposed in the rear, the cool storage chamber 135 may be disposed in the front, and the first fan 134 and the second fan 138 may be disposed in the front and rear. By making the inclination of the rotation axis of the fan of the chamber arranged in the foreground larger than the inclination of the rotation axis of the fan of the room arranged in the rear, the air volume to the upper storage chamber can be secured.

  In addition, since the cooling chamber 133 and the cold storage chamber 135 are insulated to form an independent air passage, an increase in the temperature of the cold storage chamber 135 by the defrost heater at the time of defrosting of the cooling chamber 133 can be suppressed.

  As described above, the refrigerator according to the present invention can reduce power consumption during daytime in actual use or when there is a lot of load due to door opening and closing, so it can be applied to various cooling devices such as commercial refrigerators. it can.

101 Refrigerator 102b Return duct 109a, 127a, 127b, 127e Recess 114, 133 Cooling chamber 115 Cooler 120 Refrigerating chamber discharge duct 125 End plate 126 Refrigerant pipe 126a U-shaped bent pipe 127, 130, 131, 132, 136 Cold storage material 137 Second cooler 139 Switching valve 140 First cooler

Claims (4)

A storage room cooled by operation of the compressor, a cooling room having a cooler for cooling the storage room, a regenerator material that changes phase, and a return duct for returning the cool air that has cooled the storage room to the cooler. It is a refrigerator provided, Comprising: The said cool storage material is arrange | positioned in the said return duct, The said cooler has arrange | positioned in the vicinity of the said cool storage material, The refrigerator characterized by the above-mentioned. The refrigerator according to claim 1, wherein the cool storage material is disposed in a return duct that is insulated from the cooling chamber, beside a cooling chamber constituting a cooler. The refrigerator according to claim 1, wherein the storage chamber is a refrigeration chamber, and the return duct is a duct to which cold air circulated through the refrigeration chamber returns. The refrigerator according to any one of claims 1 to 3, wherein the cold storage material is arranged in a step portion formed in the return duct.

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