JP6723499B2 - refrigerator - Google Patents

Description

The present invention relates to a refrigerator, and more particularly to a refrigerator including a plurality of storage chambers that communicate with each other via an air passage.

A general refrigerator is provided with a plurality of storage chambers for cooling foods and other items to be refrigerated.The cooler, which is an evaporator, cools the cool air in the cooling chamber, and the cool air is cooled from the cooling chambers via an air passage. By blowing air into the storage chambers, each storage chamber is kept at a predetermined internal temperature. Further, the cold air that has cooled each storage chamber returns to the cooling chamber via the return air passage.

Patent Document 1 describes an example of this type of refrigerator. FIG. 12 is a front view showing the refrigerator 100 described in this document. This refrigerator 100 has a refrigerating chamber 120 and a freezing chamber 130 in the upper stage, and the cool air cooled by a cooler (not shown) is blown to the refrigerating chamber 120 and the freezing chamber 130 via each ventilation passage.

In the refrigerator 100, inlet dampers 105, 106, 107, and 108 are provided in the cold air supply air passages 101, 102, 103, and 104 that send the cool air cooled by the cooler to the refrigerating chamber 120, respectively. Further, outlet dampers 113, 114, 115 are provided in the cold air return air passages 109, 110, 111 for returning the cool air from the storage chamber to the cooler unit, respectively. Further, an outlet damper 116 is provided in a cold air return air passage from the freezer compartment 130 which is not shown in the drawing. Then, during the defrosting operation, all or part of the inlet dampers 105, 106, 107, 108 and the outlet dampers 113, 114, 115, 116 are closed.

JP, 2009-250476, A

However, in the refrigerator 100 having the above-described configuration, for example, when the refrigerator 100 is in use, the door that closes each storage chamber may be unnecessarily opened.

Specifically, while the refrigerating room 120 and the freezing room 130 are being cooled, each damper is in an open state in order to circulate cold air. Therefore, the refrigerating chamber 120 and the freezing chamber 130 communicate with each other via the cool air supply air passages 101, 102, 103, 104 and the cool air return air passages 109, 110, 111. At this time, for example, if the door (not shown) that closes the refrigerating compartment 120 is once opened and then the door is vigorously closed, the cool air existing inside the refrigerating compartment 120 is cooled by the cold air supply air passages 101, 102, 103. It flows into the freezer compartment 130 via 104 and the cold air return air ducts 109, 110, 111. Then, the internal pressure of the freezing compartment 130 increases, and the door for closing the freezing compartment 130 may open even though the user is not operating it. In such a case, the user needs to close the open door, which is complicated, and cold air in the freezing room escapes to the outside through the open door, which may increase power consumption.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a refrigerator in which other doors are prevented from opening unnecessarily when the user performs an opening/closing operation of the door. To do.

A refrigerator of the present invention includes a refrigerator body having a first storage chamber and a second storage chamber, a first door closing an opening of the first storage chamber, and a second door closing an opening of the second storage chamber. A door, a cooler for cooling the cold air supplied to the first storage chamber and the second storage chamber, a cooling chamber in which the cooler is stored, and the cooling chamber to the first storage chamber and the second storage chamber. An opening through which the cold air supplied to the storage chamber passes, a supply air passage through which the cold air supplied from the cooling chamber to the first storage chamber passes, the second storage chamber and the above in the open state. A shielding device that connects the supply air passage and the cooling chamber, and in the closed state, connects the supply air passage and the cooling chamber, and blocks the communication between the supply air passage and the second storage chamber. And a return air passage through which the cool air returning from the first storage chamber returns to the cooling chamber, a detection unit that detects the opening/closing state of the first door, and the shielding device based on the output of the detection unit. And a control device for controlling the control device, wherein the control device closes the shielding device based on an output of the detection means indicating that the first door is opened.

Further, the refrigerator of the present invention further comprises an air passage switch that adjusts the amount of the cool air flowing through the supply air passage, and the control device includes the detection unit that indicates that the first door is opened. Based on the output, the air passage switch is used to shut off the supply air passage.

Further, in the refrigerator of the present invention, the control device integrates the time during which the defrosting of the cooler is not performed, and when the integrated time is longer than a predetermined first time, the shielding device is It is characterized by opening operation.

Further, in the refrigerator according to the present invention, the control device blows the cool air to the first storage chamber and also cools the second storage chamber when the internal temperature of the first storage chamber is equal to or higher than the first temperature. If the internal temperature is equal to or higher than the second temperature, the cool air is blown to the second storage chamber, and the control device is such that the internal temperature of the first storage chamber is lower than the first temperature, and When the internal temperature of the second storage chamber is equal to or higher than the second temperature, and the integrated time is equal to or longer than a predetermined second time, the shielding device is opened. Characterize.

Further, in the refrigerator of the present invention, the shielding device includes a blower cover that closes the blower arranged in the opening, a drive shaft that is screwed into the blower cover, and a motor that rotates the drive shaft. The control device applies a voltage for moving the blower cover in the opening direction to the motor of the shielding device in the open state.

A refrigerator of the present invention includes a refrigerator body having a first storage chamber and a second storage chamber, a first door closing an opening of the first storage chamber, and a second door closing an opening of the second storage chamber. A door, a cooler for cooling the cool air supplied to the first storage chamber and the second storage chamber, a cooling chamber in which the cooler is housed, the cooling chamber to the first storage chamber and the second An opening through which the cold air supplied to the storage chamber passes, a supply air passage through which the cold air supplied from the cooling chamber to the first storage chamber passes, the second storage chamber and the above in the open state. A shielding device that connects the supply air passage and the cooling chamber, and in the closed state, connects the supply air passage and the cooling chamber, and blocks the communication between the supply air passage and the second storage chamber. And a return air passage through which the cool air returning from the first storage chamber returns to the cooling chamber, a detection unit that detects the opening/closing state of the first door, and the shielding device based on the output of the detection unit. And a control device for controlling the control device, wherein the control device closes the shielding device based on an output of the detection means indicating that the first door is opened.

Therefore, when the first door is opened, by blocking the opening of the cooling chamber with the blocking device, the air passage connecting the first storage chamber and the second storage chamber can be closed via the return air passage. .. Therefore, even if pressure is applied to the first storage chamber by the user subsequently closing the first door, the flow of cool air that flows from the first storage chamber into the second storage chamber via the return air passage. Are blocked by the closed shielding device. Therefore, when the first door is closed, a large amount of cold air is prevented from flowing into the second storage chamber, and the second door closing the second storage chamber is prevented from being opened unnecessarily.

Further, the refrigerator of the present invention further comprises an air passage switch that adjusts the amount of the cool air flowing through the supply air passage, and the control device includes the detection unit that indicates that the first door is opened. Based on the output, the air passage switch is used to shut off the supply air passage. Therefore, when the first door is opened, the air passage that connects the first storage chamber and the second storage chamber via the air passage can be closed by the air passage switch. Therefore, when the user closes the first door, the flow of the cold air flowing from the first storage chamber to the second storage chamber via the supply air passage is blocked by the shut-off state interposed in the middle of the supply air passage. Is blocked by the wind switch. Therefore, a large amount of cold air is prevented from flowing into the second storage chamber, and the second door that closes the second storage chamber is prevented from opening.

Further, in the refrigerator of the present invention, the control device integrates the time during which the defrosting of the cooler is not performed, and when the integrated time is longer than a predetermined first time, the shielding device is It is characterized by opening operation. Here, if the defrost cycle becomes long, the shielding device freezes, which may make the opening/closing operation difficult. In the present invention, when the time during which defrosting is not performed exceeds a certain time, the shielding device is opened to remove the attached ice. Therefore, the adhered ice is prevented from hindering the operation of the shielding device.

Further, in the refrigerator according to the present invention, the control device blows the cool air to the first storage chamber and also cools the second storage chamber when the internal temperature of the first storage chamber is equal to or higher than the first temperature. If the internal temperature is equal to or higher than the second temperature, the cool air is blown to the second storage chamber, and the control device is such that the internal temperature of the first storage chamber is lower than the first temperature, and When the internal temperature of the second storage chamber is equal to or higher than the second temperature, and the integrated time is equal to or longer than a predetermined second time, the shielding device is opened. Characterize. Here, when the internal temperature of the first storage chamber is lower than the first temperature and the internal temperature of the second storage chamber is equal to or higher than the second temperature, cold air is supplied only to the second storage chamber. Therefore, the water contained in the cold air is likely to adhere to the shielding device. When such a situation becomes longer than the preset second time, the shield device is opened to remove the ice adhering to the shield device, and the ice prevents the shield device from opening and closing. Is prevented.

Further, in the refrigerator of the present invention, the shielding device includes a blower cover that closes the blower arranged in the opening, a drive shaft that is screwed into the blower cover, and a motor that rotates the drive shaft. The control device applies a voltage for moving the blower cover in the opening direction to the motor of the shielding device in the open state. Therefore, by supplying an electric current to the motor of the shield device in the open state, the motor heats up, and the ice generated by the heat can be melted and removed.

It is a front external view of the refrigerator which concerns on embodiment of this invention. It is a side sectional view showing a schematic structure of a refrigerator concerning an embodiment of the present invention. 1 is a schematic front view illustrating a supply air passage of a refrigerator according to an embodiment of the present invention. It is a side sectional view showing the structure near the cooling room of the refrigerator concerning the embodiment of the present invention. It is a disassembled perspective view which shows the shielding device with which the refrigerator which concerns on embodiment of this invention is equipped, (B) is a perspective view. It is a block diagram which shows the connection structure of the refrigerator which concerns on embodiment of this invention. It is a figure explaining the refrigerator which concerns on embodiment of this invention, and is a flowchart which shows the control method of a refrigerator. It is a figure explaining the refrigerator which concerns on embodiment of this invention, and is a flowchart which shows the control method of a refrigerator. It is a side sectional view showing a flow of cold air near a cooling room of a refrigerator concerning an embodiment of the present invention. It is a figure explaining the refrigerator which concerns on embodiment of this invention, and is a flowchart which shows the other control method of a refrigerator. It is a side sectional view showing a flow of cold air near a cooling room of a refrigerator concerning an embodiment of the present invention. It is a front view showing a refrigerator concerning background art.

<Schematic configuration of refrigerator>
A refrigerator 1 according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front external view showing a schematic structure of a refrigerator 1 according to an embodiment of the present invention. As shown in FIG. 1, the refrigerator 1 according to the present embodiment includes a heat insulating box 2 as a refrigerator main body, and the inside of the heat insulating box 2 forms a storage chamber for storing food and the like. As the storage chamber, the uppermost stage is the refrigerating chamber 3, the lower stage is the ice making chamber 4, the right side is the upper freezing chamber 5, the lower stage is the lower freezing chamber 6, and the lowermost stage is the vegetable chamber 7. The ice making chamber 4, the upper freezing chamber 5, and the lower freezing chamber 6 are all storage chambers in the freezing temperature range, and in the following description, they may be collectively referred to as the freezing chamber 4A.

The front surface of the heat insulating box 2 is open, and doors and the like are provided at the openings corresponding to the refrigerating compartment 3 and the like so as to be openable and closable. The doors 8a, 8b divide and close the front surface of the refrigerating chamber 3, and the lower left lower portion of the door 8a and the upper right lower portion of the door 8b are rotatably supported by the heat insulating box 2. Each of the doors 9 to 12 is integrally combined with a storage container and is supported by the heat insulating box body 2 so as to be freely drawn out in front of the refrigerator 1. Here, for example, the door 8 that closes the refrigerating chamber 3 that is the first storage chamber corresponds to the first door, and the door 9 that closes the freezing chamber 4A that is the second storage chamber corresponds to the second door.

Further, the heat insulation box 2 is provided with an opening/closing sensor 30 as a detecting means for detecting the opening/closing state of the door 8. Here, two opening/closing sensors 30 are arranged corresponding to the doors 8a and 8b. As the opening/closing sensor 30, a so-called switch-type sensor that is pressed when the doors 8a and 8b are closed may be adopted, or the strength of magnetism emitted from the magnetic bodies arranged on the doors 8a and 8b may be used. A magnetic sensor for sensing may be adopted. Further, the open/close sensor 30 may be provided for the other doors 9, 10, 11, 12 provided in the refrigerator 1.

FIG. 2 is a side sectional view showing a schematic structure of the refrigerator 1. The heat insulating box body 2 which is the main body of the refrigerator 1 includes an outer box 2a made of a steel plate having an opening on the front side, and an inner box 2b made of synthetic resin having a gap in the outer box 2a and having an opening on the front side. And a heat insulating material 2c made of foamed polyurethane that is filled and foamed in the gap between the outer box 2a and the inner box 2b. The doors 8 to 12 also have the same heat insulating structure as the heat insulating box 2.

The refrigerating compartment 3 and the freezing compartment 4A located below it are partitioned by a heat insulating partition wall 28. The interior of the freezing compartment 4A is separated from the upper freezing compartment 5 by the partition wall not shown in the drawing. In addition, cold air is allowed to flow freely between the ice making chamber 4 and the upper freezing chamber 5 and the lower freezing chamber 6 provided at the lower stage thereof. The freezing compartment 4A and the vegetable compartment 7 are separated by a heat insulating partition wall 29.

On the back surface of the refrigerating compartment 3, a refrigerating compartment supply air passage 14 as a supply air passage for supplying cool air to the refrigerating compartment 3 is formed by a partition body 45 made of synthetic resin. The refrigerating compartment supply air passage 14 is formed with an outlet 17 through which cold air flows into the refrigerating compartment 3. Further, the refrigerating compartment supply air passage 14 is provided with a refrigerating compartment damper 25 which is an air passage switch. The refrigerator compartment damper 25 is a damper that is driven by a motor or the like and can be opened and closed, and controls the flow rate of the cool air supplied to the refrigerator compartment 3 to appropriately maintain the temperature inside the refrigerator compartment 3.

A freezer compartment supply air passage 15 for flowing the cool air cooled by the cooler 32 to the freezer compartment 4A is formed on the inner side of the freezer compartment 4A. A cooling chamber 13 is formed further on the inner side of the freezer compartment supply air passage 15, and a cooler 32, which is an evaporator for cooling the cold air circulating in the refrigerator, is arranged inside the cooling chamber 13. ..

The cooler 32 is connected to the compressor 31, a radiator (not shown), and an expansion valve that is a capillary tube (not shown) via a refrigerant pipe, and constitutes a vapor compression refrigeration cycle circuit.

The refrigerator 1 also includes a refrigerating compartment temperature sensor 42 that detects the temperature inside the refrigerating compartment 3, a freezing compartment temperature sensor 43 that detects the temperature inside the freezing compartment 4A, and various other sensors not shown.

Further, the refrigerator 1 is provided with a control device 34 not shown here, and the control device 34 executes predetermined arithmetic processing based on the input values from the sensors, and the compressor 31, the blower 35, and the shielding device. Each component device such as 50 and the refrigerator compartment damper 25 is controlled.

FIG. 3 is a schematic front view showing a schematic configuration of a supply air passage of the refrigerator 1. The refrigerating compartment supply air passage 14 for supplying the cool air to the refrigerating compartment 3 is configured to send the cool air to the uppermost portion in the central portion of the refrigerating compartment 3 and then descend from both sides. As a result, cold air can be efficiently supplied to the entire inside of the refrigerating chamber 3.

The refrigerator 1 includes a return air passage 20 that allows air to flow from the refrigerating compartment 3 to the cooling compartment 13. A return port 22 which is an opening connected to the return air passage 20 is formed in the lower portion of the refrigerating chamber 3. The air in the refrigerator compartment 3 flows to the return air duct 20 via the return port 22 and then to the lower side of the cooler 32.

In front of the return air duct 20, a vegetable compartment supply air duct 16 for flowing the air cooled by the cooler 32 to the vegetable compartment 7 is formed. The vegetable compartment supply air passage 16 branches upward from the freezing compartment supply air passage 15, turns downward through the inside of the heat insulating partition wall 28 above the freezing compartment 4A, and passes through the inside of the freezing compartment 4A. doing. Then, it penetrates the heat insulating partition wall 29 and is connected to the vegetable compartment 7. The vegetable compartment 7 is formed with an outlet 19 which is an opening for blowing cold air from the vegetable compartment supply air passage 16.

The vegetable compartment supply air passage 16 is provided with a vegetable compartment damper 26 that controls the flow of cold air supplied to the vegetable compartment 7. Accordingly, the vegetable compartment 7 can be cooled independently of the refrigerating compartment 3 and the temperature of the vegetable compartment 7 can be appropriately controlled.

A return port 24 is formed in the vegetable compartment 7, and the air in the vegetable compartment 7 flows from the return port 24 to the lower portion of the cooling chamber 13 via the vegetable compartment return air passage 21 and the return port 13b.

FIG. 4 is a side sectional view showing the structure near the cooling chamber 13 of the refrigerator 1. The cooling chamber 13 is provided on the back side of the freezing chamber supply air passage 15. The cooling chamber 13 and the freezing chamber 4A are partitioned by a partition member 46 made of synthetic resin. That is, the cooling chamber 13 is a space formed by being sandwiched between the inner box 2b and the partition body 46.

The freezer compartment supply air passage 15 formed in front of the cooling compartment 13 is a space formed between the partition body 46 and the front cover 47 made of synthetic resin and assembled in front thereof, and is cooled by the cooler 32. It becomes an air passage for cold air. The front cover 47 is formed with an air outlet 18 which is an opening for blowing cold air into the freezer compartment 4A.

A return port 23 for returning air from the freezing chamber 4A to the cooling chamber 13 is formed on the lower rear surface of the lower freezing chamber 6. A return port 13b is formed below the cooling chamber 13 and is connected to the return port 23 and sucks the return cool air from each storage chamber into the cooling chamber 13.

Below the cooler 32, a defrost heater 33 is provided as a defrosting unit that melts and removes the frost attached to the cooler 32. The defrost heater 33 is an electric resistance heating type heater.

A feed port 13a, which is an opening connected to each storage chamber, is formed in the upper portion of the partition body 46. That is, the feed port 13a is an opening through which cool air cooled by the cooler 32 flows, and the cooling chamber 13, the refrigerating compartment supply air passage 14, the freezing compartment supply air passage 15 and the vegetable compartment supply air passage 16 shown in FIG. And communicate with. A blower 35 that sends cold air to the freezer compartment 4A or the like is disposed at the outlet 13a.

The blower 35 is an axial blower that includes a rotary fan 37 and a casing 36 in which a wind tunnel 36a that is a substantially cylindrical opening is formed. The casing 36 is attached to the feed port 13 a of the cooling chamber 13. A fan 37 is arranged in the casing 36 coaxially with the wind tunnel 36a.

A shielding device 50 having a blower cover 51 for closing the feed opening 13a is provided outside the feed opening 13a of the cooling chamber 13. The shielding device 50 is attached such that the support base 53 thereof is in close contact with the casing 36 of the blower 35.

The surface of the blower cover 51 facing the cooling chamber 13 is formed in a concave shape. As a result, the blower cover 51 can contact the support base 53 on the outside of the wind tunnel 36a and close the delivery port 13a without contacting the fan 37 protruding toward the discharge side with respect to the casing 36. Further, the blower cover 51 moves in the front-rear direction as the drive shaft 61 rotates. A gap is formed between the shielding device 50 and the blower cover 51 to allow the blower cover 51 to move in the front-rear direction.

An upper side surface of the blower cover 51 is opened, and a guide duct 59 that closes the opening is arranged. The guide duct 59 constitutes a part of the refrigerating compartment supply air passage 14a. When the blower cover 51 does not close the feed opening 13a, which is the opening, the opening formed in the upper portion of the blower cover 51 is not closed by the guide duct 59. On the other hand, when the blower cover 51 closes the feed opening 13a, which is an opening, the opening formed in the upper portion of the blower cover 51 is closed by the guide duct 59. The detailed structure and function of the guide duct 59 will be described later with reference to FIG.

<Structure of shielding device>
The configuration of the shielding device 50 adopted in the refrigerator 1 described above will be described with reference to FIG. 5. FIG. 5A is a perspective view showing each member constituting the shielding device 50 in a disassembled state in the front-rear direction, and FIG. 5B is a perspective view showing the shielding device 50 in an open state.

With reference to FIG. 5A, the shielding device 50 has a blower cover 51 that covers the fan 37 described above, and a support base 53 that attaches the blower cover 51 to the main body of the refrigerator 1. In addition, the guide duct 59 connects the blower cover 51 and the air passage on the refrigerator body side as described above. The main function of the shielding device 50 is to supply the cold air generated by the rotation of the fan 37 to a desired storage chamber by appropriately opening or closing the fan 37. Further, by closing the shielding device 50, the warm air generated in the defrosting process of the cooler 32 is prevented from flowing into the freezer compartment 4A and the like.

The blower cover 51 is formed by molding a synthetic resin material into a substantially lid shape, and has a main surface portion 69 having a substantially rectangular shape and a side surface portion 70 extending rearward from a peripheral edge portion of the main surface portion 69. There is. Further, a screw hole 63 is formed so as to circularly penetrate near the center of the main surface portion 69, and a screw groove is formed by spirally recessing the inner side surface of the screw hole 63. Furthermore, an opening 64 is formed by opening the side surface 70 on the upper side of the blower cover 51. The opening 64 is connected to the opening 65 of the guide duct 59 described above under the condition that the blower cover 51 closes the blower 35.

In the vicinity of the lower left corner and the upper right corner of the blower cover 51, support holes 62 for inserting guide pins 54, which will be described later, are formed.

The role of the blower cover 51 is to substantially close the fan 37 arranged at the feed port 13a of the cooling chamber 13, as described later. Further, since the opening 64 is formed in the upper part of the blower cover 51, the cool air blown by the fan 37 is refrigerated via the opening 64 even under the condition that the blower cover 51 closes the fan 37. It is supplied to the chamber 3 side.

The drive shaft 61 has a substantially cylindrical shape and is provided with a screw thread in which a part of its side surface is continuously projected in a spiral shape. The threads are not shown in the drawing. Here, the screw thread formed on the side surface of the drive shaft 61 and the screw groove formed on the side surface of the screw hole 63 of the blower cover 51 are screwed together in use. A motor (not shown) is built in the drive shaft 61, and the drive force of the motor causes the drive shaft 61 to rotate by a predetermined angle. When the drive shaft 61 rotates, for example, in the clockwise direction, the blower cover 51 separates from the support base 53, a gap is formed between the blower cover 51 and the support base 53, and the blower cover 51 is opened. Therefore, the cool air blown by the fan 37 (not shown) is supplied to the freezer compartment 4A through this gap. On the other hand, when the drive shaft 61 rotates counterclockwise, for example, the side surface portion 70 of the blower cover 51 comes into close contact with the support base 53, and the above-described gap is not formed, and the side surface 70 is closed. Therefore, the cool air blown by the fan 37 (not shown) is not supplied to the freezer compartment 4A, but is supplied to the refrigerating compartment 3 via the opening 64 and the guide duct 59 described above.

The support base 53 has a frame portion 71 having a quadrangular frame shape in a plan view, a shaft support portion 72 for supporting the drive shaft 61 disposed in the central portion, a shaft support portion 72, and a corner portion of the frame portion 71. It mainly has a support frame 60 that connects the two and guide pins 54 that are erected at the lower left corner and the upper right corner of the frame 71. The frame portion 71 mechanically supports the entire support base 53, and a plurality of holes 73 are provided near the four corners thereof. The shielding device 50 including the frame portion 71 is fixed to the partition body 46 via fixing means such as a screw penetrating the hole portion 73, as shown in FIG.

The guide pin 54 is a cylindrical member that is erected at a location corresponding to the support hole 62 of the blower cover 51. The guide pins 54 are inserted into the support holes 62 and slide, so that the movement of the blower cover 51 is stably guided.

The guide duct 59 is made of a plate-shaped synthetic resin, and the opening 65 formed at the lower end thereof is arranged at a position corresponding to the opening 64 of the blower cover 51 in the closed state. Therefore, the opening 65 of the guide duct 59 and the opening 64 of the blower cover 51 have substantially the same shape and size. The opening on the rear side of the guide duct 59 is continuous with the refrigerating compartment supply air passage 14a shown in FIG. The guide duct 59 functions as a path for connecting the internal space of the blower cover 51 and the air passage leading to the refrigerating compartment 3.

With reference to FIG. 5(B), in the opened state of the shielding device 50, the blower cover 51 is moved forward by the driving force of the drive shaft 61. Therefore, the rear end of the side surface portion 70 of the blower cover 51 is separated from the support base 53, and a gap is formed between the blower cover 51 and the support base 53. Further, in this state, the opening 64 formed in the upper portion of the blower cover 51 does not communicate with the opening 65 formed in the lower portion of the guide duct 59. In this state, when the fan 37 shown in FIG. 4 is rotated to blow air, the blown cool air is supplied to the freezer compartment 4A shown in FIG. 2 through the above-described gap.

When shifting the blower cover 51 from the open state to the closed state, the drive shaft 61 is rotated counterclockwise, for example. As a result, the blower cover 51 moves rearward, and the rear end of the side surface portion 70 of the blower cover 51 comes into contact with the front surface of the support base 53. In this state, when the fan 37 shown in FIG. 4 is rotated to blow air, the blown cool air is not supplied to the freezer compartment 4A shown in FIG. 2, but is supplied only to the refrigerating compartment 3.

Here, the overlapping portion 66 is formed by projecting upward around the opening 64 formed at the upper end of the blower cover 51. In addition, the overlapping portion 67 is formed by projecting downward around the opening 65 formed at the lower end of the guide duct 59. Therefore, when the blower cover 51 is closed, the overlapping portion 66 of the blower cover 51 and the overlapping portion 67 of the guide duct 59 overlap each other. With such a structure, when the blower cover 51 is in the closed state, the airtightness of the joint between the blower cover 51 and the guide duct 59 is high, so that cool air is prevented from leaking from this joint.

<Refrigerator connection configuration>
With reference to FIG. 6, the refrigerator 1 described above includes a control device 34 including, for example, a CPU, and an input-side terminal of the control device 34 includes an opening/closing sensor 30, a refrigerating compartment temperature sensor 42, and a freezing compartment temperature sensor 43. And the outside air temperature sensor 48 is connected. Further, a refrigerator compartment damper 25, a vegetable compartment damper 26, a shielding device 50, a compressor 31, and a defrost heater 33 are connected to the output side terminal of the control device 34. The control device 34 controls the refrigerator compartment damper 25 and the like on the basis of an electric signal input from the opening/closing sensor 30 and the like connected to the input side terminal, and sets the inside temperature of each storage compartment to a predetermined temperature band. Further, the control device 34 includes a timer (not shown) and a storage device such as a RAM or a ROM. The storage device stores parameters such as time and temperature described later, a program for executing a control method described later, and the like.

<Basic operation of refrigerator>
Next, the operation of the refrigerator 1 having the above configuration will be described with reference to the above-mentioned drawings again.

First, the operation of cooling only the refrigerating chamber 3 will be described. Referring to FIG. 4, the compressor 31 is operated, the refrigerator compartment damper 25 is opened, and the blower 35 is operated based on an instruction from the control device 34. In this case, the blower cover 51 is closed.

The air cooled by the cooler 32 sequentially passes through the outlet 13a of the cooling chamber 13, the blower 35, the internal space of the blower cover 51, the induction duct 59, the refrigerator compartment damper 25, the refrigerator compartment supply air passage 14 and the outlet 17. Then, it is supplied to the refrigerator compartment 3. Thereby, the food or the like stored in the refrigerating compartment 3 can be cooled and stored at an appropriate temperature.

Then, the circulating cold air supplied to the inside of the refrigerating chamber 3 returns to the inside of the cooling chamber 13 from the return port 22 via the return air passage 20 as shown in FIG. Then, it will be cooled again by the cooler 32.

Here, the control device 34 supplies cold air so that the internal temperature of the refrigerating compartment 3 is in a predetermined temperature band. Specifically, when the inside temperature of the refrigerating compartment 3 measured by the refrigerating compartment temperature sensor 42 is equal to or higher than the first temperature which is the upper limit temperature, the controller 34 operates the compressor 31 to cool the refrigerator. The cool air cooled in the container 32 is blown into the refrigerating chamber 3 by the blower 35. The blown cool air passes through the shielding device 50, and is supplied to the refrigerating compartment 3 via the refrigerating compartment damper 25, the refrigerating compartment supply air passage 14 and the air outlet 17. After that, when the internal temperature of the refrigerating compartment 3 measured by the refrigerating compartment temperature sensor 42 reaches the lower limit temperature, the control device 34 stops blowing air to the refrigerating compartment 3. When the control device 34 stops blowing air to the refrigerating compartment 3, either or both of stopping the compressor 31 and closing the refrigerating compartment damper 25 are performed. Here, the first temperature, which is the above-mentioned upper limit temperature, is also referred to as an ON point, and is set to, for example, about +5°C. The above-mentioned lower limit temperature is also called an OFF point and is set to +2°C, for example.

Next, the operation of cooling only the freezer compartment 4A will be described. Referring to FIG. 4, based on an instruction from the control device 34, the compressor 31 is operated, the refrigerator compartment damper 25 is closed, the blower 35 is operated, and the blower cover 51 is opened to cool the freezer compartment 4A. It can be carried out. Specifically, the blower cover 51 is separated from the support base 53 as shown in FIG. As a result, the air cooled by the cooler 32 is sent out by the blower 35 arranged at the sending port 13a of the cooling chamber 13, passes through the freezing chamber supply air passage 15 and the blowout port 18 in sequence, and only the freezing chamber 4A. Is supplied to.

As a result, the food or the like stored in the freezer compartment 4A can be cooled and stored at an appropriate temperature. Then, the air inside the freezing chamber 4A passes through the return port 23 formed at the back of the lower freezing chamber 6 and flows into the inside of the cooling chamber 13 via the return port 13b of the cooling chamber 13.

Here, the control device 34 supplies cold air so that the internal temperature of the freezer compartment 4A falls within a predetermined temperature band. Specifically, when the internal temperature of the refrigerating compartment 3 measured by the freezing compartment temperature sensor 43 is equal to or higher than the second temperature which is the upper limit temperature, the control device 34 blows cold air to the freezing compartment 4A. .. Specifically, the control device 34 operates the compressor 31 and causes the blower 35 to blow the cool air cooled by the cooler 32. The blown cool air passes through the shielding device 50, and is supplied to the freezer compartment 4A via the freezer compartment supply air passage 15 and the air outlet 18. After that, when the internal temperature of the freezer compartment 4A measured by the freezer compartment temperature sensor 43 reaches the lower limit temperature, the control device 34 stops blowing air to the freezer compartment 4A. When the control device 34 stops blowing air to the freezer compartment 4A, either or both of stopping the compressor 31 and closing the shielding device 50 are performed. Here, the second temperature, which is the upper limit temperature described above, is also referred to as an ON point, and is set to, for example, about -18°C. The above-mentioned lower limit temperature is also called an OFF point and is set to, for example, -22°C.

Next, the supply of cold air to the vegetable compartment 7 will be described. Based on the instruction of the control device 34, a part of the air sent to the freezer compartment supply air passage 15 by the blower 35 flows into the vegetable compartment supply air passage 16 by opening the vegetable compartment damper 26 shown in FIG. It is discharged from the outlet 19 to the vegetable compartment 7. Thereby, the inside of the vegetable compartment 7 can be cooled. Then, the cold air circulated in the vegetable compartment 7 is returned to the cooling compartment 13 from the return opening 24 shown in FIG. 3 through the vegetable compartment return air passage 21 and the return opening 13b in order. Similarly to the above, the temperature inside the vegetable compartment 7 is also controlled to be within a predetermined range.

Next, the operation of cooling both the refrigerating compartment 3 and the freezing compartment 4A will be described with reference to FIG. In this case, the control device 34 shortens the length at which the blower cover 51 and the support base 53 are separated from each other as compared with the case where only the freezer compartment 4A is cooled. For example, the control device 34 sets the length at which the blower cover 51 and the support base 53 are separated from each other to about half as compared with the case where only the freezer compartment 4A is cooled. Further, the control device 34 opens the refrigerator compartment damper 25. In this state, when the cool air cooled by the cooler 32 is blown by the fan 37 based on the instruction of the control device 34, a part of the blown cool air enters the freezer compartment 4A from the gap between the blower cover 51 and the support base 53. The other part of the supplied cold air is supplied to the refrigerating compartment 3 via the induction duct 59, the refrigerating compartment damper 25, and the refrigerating compartment supply air passage 14.

Next, the operation during the defrosting operation will be described. When the cooling operation is continued, frost adheres to the heat transfer surface on the air side of the cooler 32, hinders heat transfer, and blocks the air flow path. Therefore, the defrosting operation for removing the frost attached to the cooler 32 is started.

In this defrosting operation, the compressor 31 is stopped, the defrosting heater 33 is energized, and the frost adhering to the cooler 32 is melted based on an instruction from the control device 34. At this time, the control device 34 closes the blower cover 51, closes the feed opening 13a, and closes the refrigerator compartment damper 25. Thereby, the air in the cooling chamber 13 heated by the defrost heater 33 can be prevented from flowing out to the refrigerating compartment supply air passage 14 and the freezing compartment supply air passage 15. As a result, the cooling efficiency of the refrigerator 1 can be improved.

Further, when the defrosting of the cooler 32 is completed, the energization of the defrost heater 33 is stopped, the compressor 31 is activated, and the cooling by the refrigeration circuit is started based on the instruction of the control device 34.

The above is the description regarding the basic operation of the refrigerator 1 according to the present embodiment.

<Refrigerator door opening/closing control and freezing prevention control of the shielding device>
Next, based on FIGS. 7 to 11, the control for preventing the doors of the refrigerator 1 from opening unnecessarily will be described with reference to the above-mentioned drawings. Specifically, in the control described in detail below, with reference to FIG. 1, when the user performs the opening/closing operation of the door 8 of the refrigerating compartment 3, the door 9 or the like for closing the freezing compartment 4A is opened. To prevent that. Further, here, control is also performed to prevent the shielding device 50 from freezing due to a longer defrost cycle.

7 is a flowchart showing a control for preventing the opening operation of the door, FIG. 8 is a flowchart for a control for judging whether or not the control for preventing the freezing of the shielding device 50 is necessary, and FIG. 9 is the above-mentioned control. It is a side sectional view showing a flow of cold air when performing. FIG. 10 is a flowchart showing another control method for controlling the opening operation of the door, and FIG. 11 is a side sectional view showing the flow of cold air when performing this other control method.

Referring to the flowchart of FIG. 7, first, in step S10, each parameter is initialized. That is, the control device 34 turns off the antifreezing control FLAG, resets the count timer A, and resets the count timer B.

Next, in step S11, the control device 34 makes a freeze prevention determination of the shielding device 50. Here, the prevention of freezing of the shielding device 50 will be described. With reference to FIG. 4, the shielding device 50 is a device that controls the air passage of the cool air cooled by the cooler 32, and rotates the drive shaft 61 based on an instruction from the control device 34, thereby causing the blower cover 51 to rotate. Opening and closing of. The drive shaft 61 and the blower cover 51 are screwed together. Further, the blower cover 51 is in the closed state during the defrosting process described above, but is often in the open state during the cooling operation of each storage chamber. Therefore, when the outside air temperature is low and the cycle of the defrosting process is long, the shielding device 50 in the open state freezes, and the shielding device 50 can be opened/closed based on the instruction of the control device 34. It can be difficult. In the present embodiment, it is determined from the outside air temperature, the defrost cycle, and the like whether or not control for preventing freezing of the shielding device 50 is required. Then, by operating the shielding device 50 as necessary, the shielding device 50 is prevented from freezing. Details of step S11 will be described later with reference to FIG.

In step S12, the control device 34 determines whether or not the defrosting of the cooler 32 is being performed. If defrosting is being performed, the determination result in step S12 is YES, so the control device 34 determines in step S14 whether or not the shielding device 50 is in the open state. If step S14 is NO, the shielding device 50 is already in the closed state, and the operation for closing is not necessary. Therefore, the process returns to step S11 described above. On the other hand, in the case of YES in step S14, since the shielding device 50 is in the open state, the shielding device 50 is closed in step S15 based on the instruction from the control device 34. By doing so, referring to FIG. 4, the blower cover 51 of the shielding device 50 closes the feed port 13a, so that the warm air inside the cooling chamber 13 heated by the defrost heater 33 generating heat, Inflow into the freezer compartment 4A or the like is suppressed.

If NO in step S12, the defrosting process is not performed, and thus the control device 34 determines in step S13 whether the door 8 provided in the refrigerating compartment 3 is open. The control device 34 determines whether or not the door 8 is in the open state based on the input information input from the opening/closing sensor 30 to the control device 34. In the case of YES in step S13, since the door 8 is in the open state, the process proceeds to steps S14 and S15 described above, and the control device 34 closes the shielding device 50. By doing so, when the user subsequently closes the door 8, the door 9 or the like for closing the freezer compartment 4A is prevented from being opened unnecessarily.

Such matters will be described in detail with reference to FIGS. 3 and 9. Referring to FIG. 3, refrigerating compartment 3 and freezing compartment 4A described above communicate with each other via refrigerating compartment supply air passage 14. Further, the refrigerating chamber 3 and the freezing chamber 4A communicate with each other via the return air passage 20, the cooling chamber 13, and the sending port 13a. Therefore, when the door 8 (not shown) that closes the refrigerating compartment 3 is opened and then closed again, the internal pressure of the refrigerating compartment 3 increases, and the cool air inside the refrigerating compartment 3 passes through the refrigerating compartment supply air passage 14 to Attempting to flow into the freezer compartment 4A. Similarly, the cold air inside the refrigerating chamber 3 tries to flow into the freezing chamber 4A via the return air passage 20, the cooling chamber 13, and the sending port 13a. Therefore, if the refrigerating chamber 3 and the freezing chamber 4A are in communication with each other, cold air flows into the freezing chamber 4A to increase the internal pressure, and the door 9 or the like closing the freezing chamber 4A unnecessarily opens. There is a fear.

In this embodiment, referring to FIG. 9, the control device 34 closes the shielding device 50 before the door 8 is closed again when opened. By doing so, the openings of the blower cover 51 and the guide duct 59 are closed, so that the communication between the refrigerating compartment supply air passage 14 and the freezing compartment 4A is cut off. Therefore, the flow of cold air flowing through the refrigerating compartment 3 and the refrigerating compartment supply air passage 14 is stopped by the blower cover 51 and the guide duct 59. Here, the flow of cold air flowing through the refrigerating compartment supply air passage 14 is indicated by a dotted line. Further, the blower cover 51 closes the feed port 13a of the cooling chamber 13, thereby blocking the communication between the return air passage 20 and the freezing chamber 4A. Therefore, the cold air flowing through the refrigerating chamber 3, the return air passage 20, the cooling chamber 13, and the outlet 13a is stopped by the blower cover 51 in the closed state. Here, the flow of the cool air flowing through the return air passage 20 is shown by a one-dot chain line. From this, even if the user opens the door 8 of the refrigerating compartment 3 vigorously and then closes it, the cold air inside the refrigerating compartment 3 is suppressed from flowing into the freezing compartment 4A in accordance with this operation, so that the freezing is performed. The door 9 for closing the chamber 4A is prevented from being opened unnecessarily.

In the case of NO in step S13, since the door 8 has not been opened, it is determined in step S16 whether the shielding device 50 is in the closed state. If YES in step S16, the shielding device 50 is in the closed state, and therefore the shielding device 50 is opened in order to cool the refrigerating chamber 3 and the freezing chamber 4A. On the other hand, if NO in step S16, the shielding device 50 is in the open state, so the shielding device 50 may remain in the open state for a long time. Therefore, in step S17, the freeze prevention control flag is ON. Determine whether or not. The antifreezing control flag is set to ON when the control for the antifreezing is required in step S11 described above, and is set to OFF when the control is not required. When the freeze prevention control FLAG is ON, the process proceeds to step S19. On the other hand, when the antifreezing control FLAG is not ON, that is, when it is OFF, the process proceeds to step S11 described above.

In step S19, the ice attached to the shielding device 50 is removed. Specifically, with reference to FIG. 4, the control device 34 applies a voltage for further moving the blower cover 51 in the opening direction to a motor (not shown) incorporated in the shielding device 50 in the open state. To do. By doing so, the drive shaft 61 driven by the motor does not rotate any more, so that the motor also does not rotate and heat is generated. In this embodiment, the heat generated by the motor melts the ice adhering to the shielding device 50. For example, referring to FIG. 5(A), the ice adhered between the screw thread (not shown) of the drive shaft 61 and the screw groove (not shown) formed in the screw hole 63 of the blower cover 51 is melted. By doing so, the defrosting process is not performed for a long time, so that even if the shielding device 50 remains in the open state, the shielding device 50 freezes and the opening/closing operation thereof is hindered. It is prevented.

Further, in this step, the length of time for which the voltage is applied to the motor is longer than the length for which the voltage is applied to the motor when the shielding device 50 is changed from the closed state to the open state. As an example, when the shielding device 50 is changed from the closed state to the open state, the voltage is applied to the motor for 7 seconds, and the voltage is applied to the motor in this step for 15 seconds. is there. In this way, by applying the voltage to the motor for a relatively long time, it is possible to increase the heat generation amount of the motor and increase the effect of melting ice.

After step S19 ends, the process returns to step S10, and the normal cooling operation is performed.

Next, with reference to FIG. 8, the above-mentioned step S11 for turning on or off the antifreezing FLAG will be described in detail.

In step S101, the control device 34 determines whether the outside air temperature is equal to or lower than a predetermined temperature and is not being defrosted. Specifically, with reference to FIG. 6, it is determined whether the outside air temperature measured by the outside air temperature sensor 48 is equal to or lower than a predetermined value and the defrosting heater 33 does not perform heating. Here, the predetermined temperature is, for example, 20° C., and when the temperature is equal to or lower than the temperature, the defrost cycle becomes long, and the shielding device 50 described above becomes a condition in which it easily freezes.

If step S101 is NO, the outside temperature of the refrigerator 1 is higher than 20 degrees, the defrosting process is in progress, or both. Therefore, since there is little possibility that a large amount of ice will adhere to the shielding device 50 and the opening/closing operation thereof will be hindered, the freeze prevention determination is ended, and the process proceeds to step S12 shown in FIG. 7. In this case, since the freeze prevention control FLAG remains OFF, the control device 34 does not perform the operation of step S19 for removing the ice adhering to the shielding device 50.

On the other hand, when step S101 is YES, the outside air temperature of the refrigerator 1 measured by the outside air temperature sensor 48 is 20 degrees or less, and the defrosting process is not performed. Therefore, since a large amount of ice may adhere to the shielding device 50, the control device 34 performs the following steps. Specifically, the control device 34 increments the count timer A in step S102. That is, the control device 34 starts integration of the time when the outside air temperature of the refrigerator 1 measured by the outside air temperature sensor 48 is 20 degrees or less and the defrosting process is not performed. Then, when the time accumulated by the count timer A has passed a predetermined first time, for example, 24 hours, YES is determined in step S103, so that the shielding device 50 is contacted with cold air for a long period of time, so that the shielding device 50 Since ice may be attached and frozen, the control device 34 turns ON the freeze prevention control FLAG in step S107. By doing so, the operation of removing the ice adhering to the shielding device 50 is performed in step S19 shown in FIG.

On the other hand, in the case of NO in step S103, the time during which defrosting is not performed has not passed for 24 hours or more under the condition of low outside air temperature, and therefore the control device 34 instructs the process to proceed to step S104.

In step S104, the control device 34 confirms whether the temperature inside the refrigerator compartment 3 is lower than the ON point and the temperature inside the freezer compartment 4A is equal to or higher than the ON point. Here, as described above, the ON point of the refrigerator compartment 3 is the first temperature and the ON point of the freezer compartment 4A is the second temperature.

In the case of YES in step S104, referring to FIG. 2, the control device 34 closes the refrigerating compartment damper 25, does not supply cold air to the refrigerating compartment 3, and opens the shielding device 50 to open the freezing compartment 4A. Supply cold air to. That is, the cool air cooled in the cooling chamber 13 is supplied only to the freezing chamber 4A via the opening of the shielding device 50. In such a state, cold air is circulated only in the freezing compartment 4A and the cooling compartment 13, and the shielding device 50 is more likely to freeze than in a case where cold air is supplied to both the refrigerating compartment 3 and the freezing compartment 4A. On the other hand, if NO in step S104, the process ends.

In step S105, the count timer B is counted up, and the time during which the state of step S104 continues is integrated.

In step S106, it is determined whether or not the time accumulated by the count timer B has passed one hour which is the second time. If YES in step S106, the integration time of the count timer B has passed one hour, and there is a possibility that the shielding device 50 is frozen. Therefore, based on an instruction from the control device 34, the process proceeds to step S107. , Turn ON the antifreezing control FLAG. By doing so, a heating operation for removing ice adhering to the shielding device 50 is performed based on an instruction from the control device 34 in step S31 described later. On the other hand, if step S106 is NO, the control device 34 ends the series of steps for determining the antifreezing control FLAG because the integrated time of the count timer B has not passed one hour, and the antifreezing control FLAG is turned off. Will remain.

Next, another control method for preventing the doors from opening unnecessarily will be described with reference to FIGS. 10 and 11. The control method described here is basically the same as the control method described with reference to FIGS. 7 and 8. The difference is that the damper is closed to prevent an unnecessary opening operation of the door. To do. Therefore, the difference will be mainly described below, and the description of the same parts as those of the control method shown in FIG. 7 will be omitted.

Referring to FIG. 10, step S20 of initializing each variable, step S21 of determining antifreezing control, step S22 of determining whether or not defrosting is in progress, and step of determining opening/closing of door 8 of refrigerating compartment 3. The control in S23 is the same as the control in step S10, step S11, step S12, and step S13 described with reference to FIG.

In step S24, the control device 34 determines whether or not the refrigerator compartment damper 25 shown in FIG. 11 is open. When step S24 is NO, that is, when the refrigerator compartment damper 25 is in the closed state, the process proceeds to steps S26 and S27 based on the instruction of the control device 34. The control in steps S26 and S27 is similar to the control in steps S14 and S15 described above.

If NO in step S24, the refrigerator compartment damper 25 is in the open state, so in step S25, the control device 34 turns off the refrigerator compartment damper 25 shown in FIG. As a result, the path connecting the refrigerating compartment supply air passage 14 and the freezing compartment 4A is cut off. Thus, even if the user closes the open door 8 of the refrigerating compartment 3 to increase the internal pressure of the refrigerating compartment 3, the refrigerating compartment damper 25 is in the shut-off state, so that the refrigerating compartment supply air passage 14 is closed. Cold air does not flow into the freezer compartment 4A from the refrigerating compartment 3 via the cold air. Further, as described above, since the shielding device 50 is in the closed state in step S26 and step S27, the flow of the cool air flowing into the freezing chamber 4A via the return air passage 20 and the cooling chamber 13 is Stop at the shielding device 50. Here, in addition to the shielding device 50, the refrigerating compartment damper 25 blocks the flow of cold air from the refrigerating compartment 3 into the freezing compartment 4A when the door 8 of the refrigerating compartment 3 is closed. Therefore, the effect of preventing the door 9 of the freezer compartment 4A and the like from opening unnecessarily with the opening/closing operation of the door 8 becomes remarkable.

Here, step S28 of determining the opening/closing state of the shielding device 50 and step S30 of opening the shielding device 50 are the same as steps S16 and S18 described above. Further, step S29 for determining whether the antifreezing control FLAG is ON and step S31 for opening the shielding device 50 are the same as steps S17 and S19 described above.

The present invention is not limited to the above-described embodiment, and other various modifications can be made without departing from the scope of the present invention.

For example, with reference to FIG. 1, the control method for preventing an unnecessary opening operation of the door 9 of the freezer compartment 4A and the like when the opening/closing operation of the door 8 of the refrigerating compartment 3 is performed has been described above. The control method described above may be applied to the door. For example, the control device 34 detects the opening operation of the door 9 or the like of the freezer compartment 4A and closes the shielding device 50 or the refrigerator compartment damper 25, so that the door 8 is not necessary in association with the closing operation of the door 9. You may prevent it from opening.

Further, referring to FIG. 3, the vegetable compartment damper 26 interposed in the vegetable compartment supply air passage 16 may be closed at the same time as the steps S24 and S25 shown in FIG. By doing so, it is possible to prevent the door 12 that closes the vegetable compartment 7 from being unnecessarily opened due to the opening/closing operation of the door 8.

1 Refrigerator 2 Insulation box 2a Outer box 2b Inner box 2c Insulation 3 Refrigerating room 4 Ice making room 4A Freezing room 5 Upper freezing room 6 Lower freezing room 7 Vegetable room 8, 8a, 8b Door 9 Door 10 Door 11 Door 12 Door 13 Cooling chamber 13a Sending port 13b Return port 14 Refrigerating chamber supply air passage 14a Refrigerating chamber supply air passage 15 Freezer compartment supply air passage 16 Vegetable room supply air passage 17 Air outlet 18 Air outlet 19 Air outlet 20 Return air passage 21 Vegetable air return air Line 22 Return port 23 Return port 24 Return port 25 Refrigerator compartment damper 26 Vegetable compartment damper 28 Insulation partition wall 29 Insulation partition wall 30 Open/close sensor 31 Compressor 32 Cooler 33 Defrost heater 34 Controller 35 Blower 36 Casing 36a Wind tunnel 37 Fan 42 Refrigerator temperature sensor 43 Freezer temperature sensor 45 Partition 46 Partition 47 Front cover 48 Outside air temperature sensor 50 Shielding device 51 Blower cover 53 Support base 54 Guide pin 59 Guide duct 60 Support frame 61 Drive shaft 62 Support hole 63 Screw hole 64 opening part 65 opening part 66 superposition part 67 superposition part 69 main surface part 70 side surface part 71 frame part 72 shaft support part 73 hole part 100 refrigerator 101, 102, 103, 104 cold air supply air duct 105, 106, 107, 108 inlet damper 109, 110, 111 Cold air return air passages 113, 114, 115, 116 Exit damper 120 Refrigerator 130 Freezer

Claims (5)

A refrigerator body having a first storage chamber and a second storage chamber,
A first door that closes the opening of the first storage chamber;
A second door that closes the opening of the second storage chamber;
A cooler for cooling the cold air supplied to the first storage chamber and the second storage chamber;
A cooling chamber in which the cooler is housed,
An opening through which the cold air supplied from the cooling chamber to the first storage chamber and the second storage chamber passes,
A supply air passage through which the cold air supplied from the cooling chamber to the first storage chamber passes,
In the open state, the second storage chamber and the supply air passage communicate with the cooling chamber, and in the closed state, the supply air passage communicates with the cooling chamber while the supply air passage communicates with the supply air passage. A shield device for blocking communication with the second storage chamber,
A return air passage through which the cold air returning from the first storage chamber to the cooling chamber passes,
Detection means for detecting the opening/closing state of the first door,
A control device for controlling the shielding device based on the output of the detection means,
The said control apparatus makes the said shielding apparatus into a closed state based on the output of the said detection means which shows that the said 1st door was opened, The refrigerator characterized by the above-mentioned. An air passage switch for adjusting the amount of the cool air flowing through the supply air passage,
The refrigerator according to claim 1, wherein the control device shuts off the supply air passage by the air passage switch based on an output of the detection means indicating that the first door is opened. .. The control device integrates the time when the defrosting of the cooler is not performed, and opens the shielding device when the integrated time is longer than a predetermined first time. The refrigerator according to claim 1 or 2. When the internal temperature of the first storage chamber is equal to or higher than the first temperature, the control unit blows the cool air to the first storage chamber and the internal temperature of the second storage chamber is equal to or higher than the second temperature. If so, the cold air is blown to the second storage chamber,
Further, the control device integrates the time when the internal cold storage temperature of the first storage chamber is lower than the first temperature and the internal cold storage temperature of the second storage chamber is equal to or higher than the second temperature, and The refrigerator according to any one of claims 1 to 3, wherein when the accumulated time is equal to or longer than a predetermined second time, the shield device is opened. The shielding device has a blower cover for closing the blower arranged in the opening, a drive shaft screwed with the blower cover, and a motor for rotating the drive shaft,
The refrigerator according to claim 3 or 4, wherein the control device applies a voltage for moving the blower cover in an opening direction to the motor of the shielding device that is in an open state.

Images