JP5404549B2 - Freezer refrigerator - Google Patents

Description

  The present invention relates to a refrigerator-freezer provided with a refrigerator in the upper part of a main body.

  Some conventional refrigerator-freezers include an indirect cooling air passage on the ceiling surface of the switching chamber installed in the center of the refrigerator and a direct cooling air passage that blows out cool air from the back side (for example, Patent Document 1). reference). In this refrigerator, the switching chamber is installed in the middle of the refrigerator main body, and the refrigerator compartment is installed in the upper part of the main body. As a result, the switching room is sandwiched between the refrigerating room and the freezing room, so there is a tendency to cool easily with little influence of heat leakage, and since the distance from the cooler (or cooling fan) is close, the air passage The resistance (pressure loss) is also small and the switching room volume is very small compared to the refrigerated room (for example, in a 400L class household refrigerator, the refrigerated room volume is around 200L, whereas the switching room volume is around 30L. However, it is also effective for indirect cooling of the air path installed on the ceiling surface.

  In addition, there is an electric refrigerator in which an air volume switching device is installed in a blow-off air passage and a return air passage installed on the back side of the storage room (see, for example, Patent Document 2). In this electric refrigerator, the temperature detection device is installed not only on the back side but also on the side of the storage room, and based on the information obtained from the temperature sensor or full ice detection device, the actuator is operated to switch the air path of the storage room ing.

  A ceiling duct is installed in the ceiling of the refrigerator compartment, a door duct for flowing cold air from the ceiling duct is installed in the refrigerator compartment door, and a fan for the refrigerator compartment is installed in the air passage at the back of the refrigerator compartment in order to secure the ventilation to the door duct. There is a refrigerator (see, for example, Patent Document 3).

  Further, as a conventional refrigerator-freezer, a back side temperature sensor 118 is installed on the back side of the refrigerating room 101, the refrigerating room has only a back side air path 117d without a ceiling air path, and further an air volume control for controlling the air volume. There is a freezer refrigerator as shown in FIG. The refrigerator-freezer shown in FIG. 14 includes a refrigerator room 101, an ice making room 102, a switching room 103, a freezer room 104, and a vegetable room 105 as storage rooms from the top. Moreover, the ventilation fan 111 which sends cold air to the back | inner side air path 117d, the cooler 112 which cools air and produces | generates cold air, and the compressor 119 which compresses the refrigerant | coolant of a refrigerating cycle are provided. The air volume control device provided in the refrigerated refrigerator includes, for example, a twin having two baffles 121, a frame 122, and a stepping motor as shown in FIG. This is a duct damper 120. This air volume control device opens the baffle 121 until the temperature detected by the back side temperature sensor 118 reaches a predetermined set temperature, so that cool air is blown into the room, and the detected temperature is When the set temperature is reached, the baffle 121 is closed to block the cool air blown into the room.

  Moreover, FIG. 16 is a figure explaining the food load factor of the refrigerator compartment 101 of this refrigerator-freezer, and the refrigerator compartment 101 with respect to the front projection area of the refrigerator compartment 101 occupied by the shelf 101a-the shelf 101d of the refrigerator compartment 101. FIG. The ratio of the front projected area occupied by the food 124 placed on each shelf is defined as the food load factor of the refrigerator compartment 101. Here, the food load factor is defined as the cold air blown out from the rear air passage in the refrigeration room 101 cools the inside of the refrigeration room 101 while the food 124 becomes a barrier to the cold air to the front side of the refrigeration room 101. This is because it is predicted that temperature unevenness will occur in the refrigerator compartment 101.

  FIG. 17 is a diagram showing the relationship between the food load factor and the temperature in the refrigerator compartment 101. In FIG. 17, the temperature at each shelf 101a to shelf 101d of the refrigerator compartment 101, the temperature at the door uppermost pocket 101g of the refrigerator compartment 101, and the temperature detected by the back side temperature sensor 118 are shown. As shown in FIG. 17, when the food load factor is high, the temperature in the refrigerator compartment 101 rises, and the upper compartment (for example, the door uppermost pocket 101g and the shelf 101a) also in the same refrigerator compartment 101. However, it can be seen that the temperature change amount with respect to the food load factor is large, and the temperature change amount of the back side temperature sensor 118 is small compared to other temperatures. Each temperature in the refrigerator compartment 101 increases as the food load factor increases. When the food load is large, the cold air blown from the back side is blocked by the food 124 and the interior of the refrigerator compartment 101 is increased. Because the back side temperature sensor 118 is excessively cooled and reaches a predetermined set temperature early, the baffle 121 for the back side air passage in the refrigerator compartment 101 is closed and the air flow is shut off. is there. In particular, as the temperature rises above the refrigerating room 101, heat leaks severely due to the outside air on the ceiling surface, and since the distance from the cooler is far away, the air path resistance increases and it becomes difficult to blow air. Compared with a certain shelf 101d, the temperature change amount with respect to the food load amount in the upper front portion such as the door uppermost pocket 101g and the uppermost shelf 101a becomes larger. Further, the reason why the temperature change amount of the back side temperature sensor 118 is small is that the amount of cold air that rebounds to the back side in the refrigerator compartment 101 (the back side of the blowout air passage) becomes larger as the food load increases. This is because the periphery of the back side temperature sensor 118 is cooled and stabilized at a predetermined set temperature.

  FIG. 18 is a diagram showing the relationship between the outside air temperature and the temperature in the refrigerator compartment 101. 18 (a) shows a case where the food load factor is 0% (no food 124), FIG. 18 (b) shows a case where the food load factor is 50%, and FIG. The case where the food load factor is 90% is shown. As shown in FIG. 18, as for the temperature of each shelf, a large difference is not seen in the cases of FIGS. 18 (a) to 18 (c) at the low outside air temperature, but this is because the outside air temperature is low. This is because the amount of heat leakage is reduced and the temperature rise in the refrigerator compartment 101 is also reduced. On the other hand, since the amount of heat leakage increases at a high outside air temperature, the temperature in the refrigerator compartment 101 increases as the food load increases (see FIG. 18C).

JP 2009-30934 A (page 20, FIG. 7) JP 2002-277141 A (6th page, FIG. 16) JP 11-304336 A (page 3, FIG. 1)

  However, in the refrigerator-freezer in Patent Document 1, as described above, there is no problem even if the air passage installed on the ceiling surface of the switching room is an indirect cooling air passage, but the air is above the ceiling surface of the refrigerator compartment. Therefore, heat leakage is severe, and in particular, there is a problem that the effect of indirect cooling cannot be expected even if a ceiling surface air passage is installed because the upper door of the refrigerator compartment is far from the cooler.

  Moreover, the electric refrigerator in patent document 2 is provided with the air volume switching device in the blow-off air passage and the return air passage installed in the back side of the storage room, and the temperature sensor is not only in the back side but also in the side of the storage room. The actuator is operated from the information obtained from the temperature sensor or the full ice detection device, and the air passage of the storage room is switched. However, the air amount adjusting device is not installed in the air passage that blows out to the ceiling. At this time, if the food load factor is low and the influence of disturbance such as opening and closing of the door is frequent, the compressor will not stop operating, the cooling fan will continue to rotate, and the food will be overcooled and frozen. There was a problem.

  Moreover, although the refrigerator in patent document 3 has installed the fan for exclusive use of the refrigerator compartment in the refrigerator compartment back side, and has installed the door duct in the door in order to assist ventilation volume, it becomes expensive in terms of cost, and it is on the back of the refrigerator compartment. By installing the dedicated fan, noise is worsened during blowing, and power for driving the dedicated fan is also consumed, so that there is a problem that economical efficiency (energy saving) is also deteriorated.

  Furthermore, as in the conventional refrigerator-freezer shown in FIGS. 14 to 18, when there are a plurality of shelves in the refrigerator compartment 101, a temperature sensor (the interior temperature sensor 118) is provided only on the interior side of the refrigerator compartment 101. If it is simply installed, temperature unevenness occurs in the top and bottom in the refrigerator compartment 101, and if the temperature sensor is installed not on the back side in the refrigerator compartment 101 but on the ceiling, the lower part of the refrigerator compartment 101 is cooled. There is a problem that it is expected that the food in the refrigerator compartment 101 will be frozen.

  The present invention has been made in order to solve the above-described problems, and even when the food load factor is high, the freezing that suppresses the temperature rise on the ceiling side and the front side in the refrigerator compartment and eliminates temperature unevenness. The object is to provide a refrigerator.

The refrigerator-freezer according to the present invention includes a refrigerating room for refrigerating food, a back side blowing air passage for blowing cold air from the back side of the refrigerating room to the refrigerating room, and cooling air from the ceiling side of the refrigerating room to the refrigerating room. To the ceiling side blowing air passage for blowing out, to the back side blowing air passage and the ceiling side blowing air passage, to adjust the amount of cool air to be circulated, to the back side blowing air passage and the ceiling side blowing air passage A blower fan for feeding cold air, a back side temperature detecting means which is installed on the back side of the refrigeration chamber and detects the back side temperature which is the inside temperature of the back side of the refrigeration chamber, and the front and upper part of the refrigeration chamber A ceiling side temperature detection means for detecting a ceiling side temperature which is installed on the side and is a ceiling side temperature in the refrigerator compartment and the front side of the cabinet, and the back side temperature detected by the back side temperature detection means, and The ceiling side temperature detection hand A control device that controls the air volume adjusting device based on the ceiling-side temperature detected by the control unit to control the amount of cool air blown out from the back-side blowout air passage and the ceiling-side blowout air passage into the refrigerator compartment. And the control device has the ceiling side temperature detected by the ceiling side temperature detection means equal to or higher than a first predetermined value, and the back side detected by the ceiling side temperature and the back side temperature detection means. When the difference from the temperature is equal to or greater than a second predetermined value, the air volume adjusting device causes the cool air to be blown into the ceiling-side blowing air passage so that the cool air is blown out from the refrigerating chamber ceiling side .

  ADVANTAGE OF THE INVENTION According to this invention, the temperature nonuniformity of a refrigerator compartment can be eliminated and suppressed, sufficient cooling performance is ensured even if food is overstuffed (a food load factor is large), and a high-quality refrigerator-freezer can be provided. it can.

It is a longitudinal cross-sectional view of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is a front view (no door) of the refrigerator-freezer according to Embodiment 1 of the present invention. It is a whole perspective view in the state where each door of the refrigerator-freezer concerning Embodiment 1 of the present invention opened. It is a block diagram of the operation panel 1h of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is an exploded view of the fan grill 10 of the refrigerator-freezer according to Embodiment 1 of the present invention. It is a block diagram of the control panel 17 of the refrigerator-freezer according to Embodiment 1 of the present invention. It is a block diagram of the ceiling duct 6 of the refrigerator-freezer according to Embodiment 1 of the present invention. It is a block diagram of the ceiling duct 6 of another form of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is a flowchart which shows the cooling operation in the refrigerator compartment 1 of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is a figure which shows the relationship between the food load factor of the refrigerator-freezer which concerns on Embodiment 1 of this invention, and the temperature of each part in the refrigerator compartment. It is a figure which shows the relationship between the food load factor of the refrigerator-freezer which concerns on Embodiment 1 of this invention, and the temperature of each part in the refrigerator compartment. It is a flowchart which shows the cooling operation | movement in the refrigerator compartment 1 of the refrigerator-freezer which concerns on Embodiment 2 of this invention. It is a flowchart which shows the cooling operation in the refrigerator compartment 1 of the refrigerator-freezer which concerns on Embodiment 3 of this invention. It is a sectional side view of the conventional refrigerator-freezer. 2 is a configuration diagram of a twin duct damper 120. FIG. It is a figure explaining the food load factor of the refrigerator compartment 101 of the conventional refrigerator-freezer. It is a figure which shows the relationship between the food load factor and the temperature in the refrigerator compartment 101 in the conventional refrigerator-freezer. It is the figure which showed the relationship between external temperature and the temperature in the refrigerator compartment 101 in the conventional refrigerator-freezer.

Embodiment 1 FIG.
(Overall configuration of refrigerator / freezer)
1 is a longitudinal sectional view of the refrigerator-freezer according to Embodiment 1 of the present invention, FIG. 2 is a front view of the refrigerator-freezer (without doors), and FIG. 3 is a diagram showing each door of the refrigerator-freezer. It is a whole perspective view of the open state.
As shown in FIGS. 1 to 3, in the refrigerator main body, the refrigerator compartment 1, the ice making compartment 2 and the switching compartment 3, the freezer compartment 4 and the vegetable compartment 5 are installed in this order from the top. Here, when each storage room is indicated without distinction, it is simply referred to as “storage room”.

  In addition, it is not limited except that the refrigerator compartment 1 is installed in the uppermost part, and other storage compartments may be arranged in any way, and all the storage compartments other than the refrigerator compartment 1 described above are arranged. It does not have to be installed. For example, a freezer refrigerator without the ice making chamber 2 or the switching chamber 3 may be used, and the arrangement of the freezing chamber 4 and the vegetable chamber 5 may be reversed.

  Each storage room is partitioned by a heat insulating partition wall. The inside of the refrigerator compartment 1 is divided by a shelf 1a to shelf 1d made of resin or glass, and is arranged in order of the shelf 1a to shelf 1d from the top. Moreover, the refrigerator compartment door 1e which is a front door of the refrigerator compartment 1 is rotatably installed so that it can open both sides with the hinge apparatus 1f attached to the right and left of the main body. One or more door pockets 1g are installed inside the refrigerator compartment door 1e. In addition, an accessory storage case 1k is installed at the lower part of the lowest shelf 1d, and the temperature is lower by 1 to 2 ° C. than the upper shelf. This is because the cold air return port of the refrigerator compartment 1 is installed in the lower right of the accessory storage case 1k, and low temperature cold air has a lower buoyancy than air having a higher temperature and thus tends to stay downward. is there.

  The storage room installed immediately below the refrigerator compartment 1 constitutes a left and right independent room, and an ice making room 2 on the left side and a switching room 3 on the right side as viewed from the front of the refrigerator main body are arranged. ing. Hereinafter, “left” and “right” for indicating the parts and the like of the refrigerator-freezer main body shall be indicated when viewed from the front.

On the left side in the ice making chamber 2, an automatic ice making machine 2a is provided. The front door of the ice making chamber 2 is a drawer-type door, and an ice making case 2b is placed on the door. In addition, a wall on the back side of the ice making chamber 2 is formed by a fan grill 10 which is an air passage component to be described later, and a baffle is provided on the fan grill 10 as a device for adjusting the amount of cool air sent into the ice making chamber 2. A single duct damper 2c for ice making chamber that is opened and closed by a stepping motor or the like is installed. This ice duct single duct damper 2c opens and closes the baffle so that the internal temperature detected by the temperature sensor 2d installed on the inner wall of the ice compartment 2 is maintained at about -18 ° C.
The internal temperature detected by the temperature sensor 2d may be controlled so as to be maintained at a set temperature set by an operation panel 1h described later.

  The front door of the switching chamber 3 is a drawer-type door, and a switching chamber case 3a is placed on this door. Further, the wall on the back side of the switching chamber 3 is also formed by a fan grill 10 which is an air passage component to be described later, as in the ice making chamber 2, and the fan grill 10 has cold air to be sent into the switching chamber 3. As an air volume adjusting device, a twin duct damper 3b for a switching chamber that opens and closes a baffle with a stepping motor or the like is installed. The switching chamber twin duct damper 3b is configured so that the internal temperature detected by the temperature sensor 3c installed on the back wall of the switching chamber 3 is maintained at the set temperature set by the operation panel 1h described later. Open and close the baffle. For example, the set temperature may be set to about −7 ° C. suitable for frozen storage for about 2 weeks, or about −18 ° C. suitable for frozen storage for about 1 month.

  The freezing chamber 4 is disposed immediately below the ice making chamber 2 and the switching chamber 3. The front door of the freezer compartment 4 is a drawer-type door, and a lower large storage case 4a is placed on the door, supported by the flange portion, and shallower than the lower large storage case 4a. A shallow case 4b is placed. A blower fan 11 is installed on the back side of the freezer compartment 4 and on the back of a fan grill 10 to be described later.

  The vegetable room 5 described above is arranged directly below the freezing room 4, that is, at the lowest part of the refrigerator main body. The temperature in the vegetable room 5 is slightly higher than the temperature in the refrigerated room 1, but is basically a storage room in a refrigerated temperature zone. The front door of the vegetable compartment 5 is also a drawer-type door. A lower storage case 5a is placed on the door, supported by the flange portion, and shallower than the lower storage case 5a. Is placed. The lower storage case 5a stores, for example, large vegetables, and the upper storage case 5b stores leafy vegetables or small vegetables, for example.

  The vegetable room 5 is cooled by cold air flowing through a return air passage (not shown) of the refrigerator room 1. The cold air flowing through the return air path of the refrigerator compartment 1 passes through the back right back of the switching chamber 3 and the back right back of the freezer compartment 4 and blows into the vegetable compartment 5 from the right back of the vegetable compartment 5. Furthermore, it flows from the ceiling part of the vegetable compartment 5 toward the cooler 12 via the central back part of the vegetable compartment 5.

  As shown in FIG. 1, a cooler 12 that performs heat exchange to generate cool air at the lower part of the blower fan 11, and a defroster that performs a defrosting operation on the cooler 12 at the lower part of the cooler 12. Heater 13, drainage pipe 14 for distributing water defrosted by the defrosting heater 13 (defrosted water), evaporating dish (defrosted water) arranged at the lower back of the refrigerator main body and guided by drainage pipe 14 (Not shown) are installed. In addition, on the upper rear side of the refrigerator main body, the temperature control of each storage room is performed based on the set temperature operated by the operation panel 1h, and the ice duct single duct damper 2c and the switching room twin duct damper 3b are implemented. And the control apparatus 15 which implements the opening-and-closing operation control of the twin duct damper 16 for refrigerators mentioned later, the rotation speed control of the ventilation fan 11 and the compressor 19 mentioned later, etc. is installed. Furthermore, the compressor 19 which circulates the refrigerant | coolant of the refrigerating cycle of a refrigerator-freezer is installed in the lower back side of the refrigerator-freezer main body.

(Configuration of operation panel 1h of the refrigerator / freezer)
FIG. 4 is a configuration diagram of the operation panel 1h of the refrigerator-freezer according to Embodiment 1 of the present invention.
As shown in FIG. 4, on the surface of the refrigerator compartment door 1e, there is installed an operation panel 1h in which a substrate 1i is embedded and the temperature of each storage compartment can be adjusted. An outside air temperature sensor 1j for detecting the outside air temperature is mounted on the substrate 1i.
The operation panel 1h may be configured to be installed in the refrigerator compartment 1 in order to improve the design aesthetics of the refrigerator-freezer. In this case, for example, the outside temperature sensor 1j is a hinge device 1f of the refrigerator compartment door 1e. It should just be installed in.

(Configuration of fan grill 10)
FIG. 5 is an exploded view of the fan grill 10 of the refrigerator-freezer according to Embodiment 1 of the present invention.
As shown in FIG. 5, the fan grill 10 has a structure in which a heat insulating material 10a is sandwiched between a resin component 10b on the front side of the refrigerated refrigerator main body and a resin component 10c on the rear side. In the resin component 10b, as described above, the temperature sensor 2d and the temperature sensor 3c are attached to the portion constituting the inner wall of the ice making chamber 2 and the inner wall of the switching chamber 3, respectively. Yes. Moreover, the ventilation fan 11 is attached to the resin component 10c so that it may blow toward the heat insulating material 10a. The heat insulating material 10a is provided with a plurality of duct dampers that adjust the amount of cold air sent to each storage chamber. As those duct dampers, a twin duct damper 16 for a cold room for blowing out the rear side air passage of the refrigerator compartment 1 and a blower for blowing out the ceiling air passage, a single duct damper for an ice making room for blowing out the rear side air passage of the ice making room 2 There are three types, 2c, and a switching room twin duct damper 3b for blowing the rear side air path of the switching chamber 3 and for blowing the ceiling air path. Among these, the refrigerating room twin duct damper 16 includes a refrigerating room inner baffle 16a for sending cold air to the inner air path of the refrigerating room 1 (a rear blowing air path 17d described later in FIG. 6), and A refrigerator-side ceiling baffle 16b is provided for sending cold air to a ceiling-side air passage (a ceiling-side blow-off air passage 17e, which will be described later with reference to FIG. 6). Here, the operation in which the cold air flows through the back side air duct or the ceiling air path of the refrigerating room 1 by the refrigerating room twin duct damper 16 will be described later.

  It should be noted that the refrigerator-freezer according to the present embodiment only needs to be configured to include at least the cold-chamber twin duct damper 16 for blowing out the cold air in the refrigerator compartment 1, and whether there is any other damper or is it a single damper? It is not limited as to whether it is a twin damper.

(Configuration of the airway parts of the refrigerator compartment 1)
FIG. 6 is a configuration diagram of the control panel 17 of the refrigerator-freezer according to Embodiment 1 of the present invention, and FIG. 7 is a configuration diagram of the ceiling duct 6 of the refrigerator-freezer.
Air duct components (hereinafter referred to as control panel 17) shown in FIG. 6 are installed on the back side of refrigerating room 1 installed in the upper part of the refrigerator main body according to the present embodiment, and the ceiling of refrigerating room 1 is provided. The ceiling duct 6 shown in FIG. 7 is installed in the part.

  The control panel 17 has a resin part 17a on the design surface side (inside the refrigerator compartment 1), and a foamed part 17b is installed on the back side of the resin part 17a. It is composed. On the back surface of the control panel 17, a back side blow-out air passage 17d (in FIG. 6) is supplied with cold air when the baffle 16a for the back side of the refrigerating room of the refrigerating room twin duct damper 16 shown in FIG. A solid line arrow) and a ceiling side blowing air passage 17e (broken arrow in FIG. 6) into which cold air is sent when the refrigerator side ceiling baffle 16b of the twin duct damper 16 for the refrigerator room is opened are independent of each other. It is formed so as to be a natural air passage. In addition, a plurality of outlets 17c are installed in the rear side blowing air passage 17d of the control panel 17 corresponding to the shelves 1a to 1d in the refrigerator compartment 1, and have been distributed through the rear side blowing air passage 17d. Cold air is blown out from the back side of the refrigerator compartment 1 to the inside through the outlet 17c. Further, a back side temperature sensor 18 for detecting the inside temperature of the back side in the refrigerator compartment 1 is installed at a substantially central portion of the control panel 17.

  The ceiling duct 6 is connected to the control panel 17 in the upper part on the back side of the refrigerator compartment 1, and the above-described ceiling-side blowout air passage 17e is formed from the back surface of the control panel 17 to the ceiling duct 6 and is installed in the ceiling of the refrigerator compartment. The cold air blown out from the side baffle 16 b is sent to the ceiling duct 6. This ceiling duct 6 is comprised by the cover 6a inside the refrigerator compartment 1, and the dew prevention heat insulating material 6b installed in the upper surface side. Moreover, the ceiling duct 6 is located substantially in the center in the width direction of the refrigerator-freezer main body, and a slit-shaped front outlet 6 c is formed in front of the ceiling duct 6. It is desirable to widen the ceiling duct 6 so that the cold air blown from the front outlet 6c is directed to the door pocket 1g. Further, an LED lighting cover 7 separate from the ceiling duct 6 is installed on both sides of the ceiling duct 6, which contributes to improving the design of the inside of the refrigerator compartment 1. The ceiling duct 6 and the LED illumination cover 7 constitute a wall surface on the ceiling side of the refrigerator compartment 1. The LED lighting cover 7 has a substrate 8 on which an LED chip is mounted, and a ceiling temperature sensor 9 is installed in front of the LED lighting cover 7 installed on the right side of the ceiling duct 6. The ceiling temperature sensor 9 detects the internal temperature of the refrigerator compartment 1 on the ceiling side and on the front side. Needless to say, the ceiling temperature sensor 9 may be installed on the LED lighting cover 7 on the left side of the ceiling duct 6. Further, a blowout port 6d is formed in the ceiling side blowout air passage 17e of the ceiling duct 6 so that the upper part in the refrigerator compartment 1 can be cooled. The number and size of the outlets 6d may be adjusted by the internal volume of the refrigerator compartment 1 and the thickness of the heat insulating material on the inner wall of the refrigerator compartment 1, and the outlet outlets as shown in FIG. The ceiling duct 6 may be configured to include only the front outlet 6c as the outlet into the refrigerator compartment 1 without forming 6d.

(Cooling operation in the refrigerator compartment 1)
As in the conventional method, the inside of the refrigerator compartment 1 is cooled from the inner side of the refrigerator compartment 1 by opening and closing the refrigerator inner compartment baffle 16a of the refrigerator-use twin duct damper 16 installed in the fan grill 10. Then, since the temperature of the upper part of the refrigerator compartment 1 will become higher compared with the lower part and the back side when the food load becomes large, the temperature detected by the ceiling temperature sensor 9 and the back side temperature sensor 18 are detected. The difference with the temperature increases. Below, the cooling operation | movement in the refrigerator compartment 1 of the refrigerator-freezer which concerns on this Embodiment is demonstrated.

  FIG. 9 is a flowchart showing a cooling operation in the refrigerator compartment 1 of the refrigerator-freezer according to Embodiment 1 of the present invention.

(S1)
In the control device 15, an opening temperature T0 (for example, 10 ° C.) which is a first predetermined value serving as a reference for switching the refrigerator-side ceiling baffle 16b of the refrigerator-use twin duct damper 16 to the opened state is set in advance. An opening temperature difference Td (for example, 8K) that is a predetermined value and a closing temperature Te (for example, 6 ° C.) that is a third predetermined value that serves as a reference for switching the refrigerator-side ceiling baffle 16b to the closed state are set. It shall be.

(S2)
The control device 15 includes a ceiling temperature T1 which is the temperature on the ceiling side and the front side in the refrigerator compartment 1 detected by the ceiling temperature sensor 9, and a back side in the refrigerator compartment 1 detected by the back temperature sensor 18. The back side temperature T2, which is the temperature, is received.

(S3)
The control device 15 confirms whether or not the refrigerator compartment ceiling baffle 16b is in a closed state. As a result of the confirmation, if it is determined that it is in the closed state, the process proceeds to step S4. On the other hand, if it is determined to be in the open state, the process proceeds to step S7.

(S4)
The control device 15 determines whether or not the ceiling temperature T1 is equal to or higher than the open temperature T0. As a result of the determination, if it is determined that the ceiling temperature T1 is equal to or higher than the open temperature T0, the process proceeds to step S5. On the other hand, when it is determined that the ceiling temperature T1 is lower than the open temperature T0, the process returns to step S2.

(S5)
The control device 15 determines whether or not the difference T1-T2 between the ceiling temperature T1 and the back side temperature T2 is equal to or greater than the open temperature difference Td. As a result of the determination, if it is determined that the difference T1-T2 is equal to or greater than the open temperature difference Td, the process proceeds to step S6. On the other hand, if it is determined that the difference T1-T2 is less than the open temperature difference Td, the process returns to step S2.

(S6)
The control device 15 determines that the ceiling temperature T1 on the ceiling side and the front side in the refrigerator compartment 1 is larger than the back side temperature T2, and that temperature unevenness occurs in the refrigerator compartment 1, and for the refrigerator compartment ceiling side. The baffle 16b is opened. When the refrigerator side ceiling baffle 16b is in the open state, the cold air flows through the ceiling side blowing air passage 17e, and the cold air is blown into the refrigerator room 1 through the front outlet 6c and the outlet 6d. The ceiling side and the front part in 1 are cooled.

(S7)
The control device 15 determines whether or not the ceiling temperature T1 is lower than the closing temperature Te. As a result of the determination, if it is determined that the ceiling temperature T1 is lower than the closing temperature Te, the process proceeds to step S8. On the other hand, if it is determined that the ceiling temperature T1 is equal to or higher than the closing temperature Te, the process returns to step S2.

(S8)
The control device 15 is such that the ceiling temperature T1 on the ceiling side and the front part in the refrigerator compartment 1 is sufficiently cooled, and the temperature between the ceiling temperature T1 on the ceiling side and the front part in the refrigerator compartment 1 and the back side temperature T2 on the back side. It is determined that the difference has become small, the refrigerator baffle ceiling baffle 16b is closed, and the process returns to step S2. Since the cold room baffle 16b for the refrigerator compartment is closed, no cold air flows into the ceiling air outlet 17e, so the amount of cold air blown out from the outlet 17c on the back side of the refrigerator compartment 1 increases and the inside of the refrigerator compartment 1 is increased. Since the time to cool becomes short, it becomes possible to suppress the power consumption of a refrigerator-freezer.

  Note that the values of the opening temperature T0, the opening temperature difference Td, and the closing temperature Te, which are the predetermined temperatures set in step S1, are examples and may be different values, but the inner volume of the refrigerator compartment 1 and the heat insulation of the inner wall of the refrigerator compartment 1 What is necessary is just to set based on the thickness etc. of material.

  Here, if the difference between the opening temperature T0 and the closing temperature Te is excessively large, the baffle 16b for the refrigerator compartment ceiling side tends to remain open when the food load factor is large. It is preferable to set to about ° C. Further, if the open temperature difference Td is too large, the baffle 16b for the refrigerator compartment ceiling side is difficult to open, the ceiling side and the front part in the refrigerator compartment 1 are difficult to cool, and if the close temperature Te is too small, the close temperature The refrigerator side ceiling baffle 16b is in an open state until the temperature drops to Te, and there is a possibility that the ceiling side and the front part are too cold. If the difference between the open temperature T0 and the close temperature Te is too small, Since the opening and closing operation of the baffle 16b for the refrigerator compartment is frequently performed and the operation sound of the twin duct damper 16 for the refrigerator compartment is disturbing to the user, the internal volume of the refrigerator compartment 1 and the refrigerator compartment as described above. It is desirable to set suitably based on the thickness etc. of the heat insulating material of 1 inner wall.

FIG. 10 is a diagram showing the relationship between the food load factor of the refrigerator-freezer and the temperature in the refrigerator according to Embodiment 1 of the present invention, and FIG. 11 shows the food load factor of the refrigerator-freezer and the inside of the refrigerator compartment 1 It is a figure which shows the relationship with the temperature of each part.
As shown in FIG. 10, the ceiling temperature T <b> 1 detected by the ceiling temperature sensor 9 is conventionally indicated by a broken line as the food load factor increases (when cold air is not circulated through the ceiling duct 6). It becomes a graph of “conventional ceiling temperature T1”. However, by performing the cooling operation in the refrigerator compartment 1 of the refrigerator / freezer according to the present embodiment shown in FIG. 8, cold air is fed into the refrigerator compartment 1 from the ceiling duct 6 by appropriate condition determination, so the food load factor The difference between the ceiling temperature T1 and the back side temperature T2 detected by the back side temperature sensor 18 is almost unchanged with respect to the food load factor. It can be seen that the occurrence of temperature unevenness in the refrigerator compartment 1 is suppressed.

  In addition, as shown in FIG. 11, conventionally, the amount of change in temperature increases as the food load factor increases (in FIG. 11, conventional graphs in the uppermost door pocket 1 g and shelf 1 a are described as examples. However, it can be seen that the cooling operation in the refrigerator compartment 1 has almost no temperature change.

(Effect of Embodiment 1)
By performing the cooling operation in the refrigerator compartment 1 of the refrigerator-freezer according to the present embodiment shown in FIG. 8 as described above, the temperature unevenness in the refrigerator compartment 1 can be eliminated and suppressed. Even when food is overstuffed (the food load factor is large), sufficient cooling performance can be ensured and a high-quality refrigerator-freezer can be provided.

  As described above, the ceiling temperature sensor 9 is preferably installed on the near side from the center in the depth direction in order to detect the inside temperature of the refrigerator compartment 1 and the front side of the refrigerator. As long as the wiring of the temperature sensor 9 is possible, it may be attached to the upper part of the inner surface of the refrigerator door 1e.

  Moreover, although the refrigerator compartment 1 of the refrigerator-freezer shown by FIGS. 1-3 is installed in the uppermost part and said effect is exhibited more, it is not limited to being especially installed in the uppermost part. In this case, the above-described effects can be obtained.

Embodiment 2. FIG.
The refrigerator-freezer according to the present embodiment will be described focusing on differences from the operation of the refrigerator-freezer according to Embodiment 1. The configuration of the refrigerator-freezer according to the present embodiment is the same as that of the refrigerator-freezer according to Embodiment 1. In the refrigerator-freezer according to the present embodiment, an operation for switching the first predetermined temperature, the second predetermined temperature, and the third predetermined temperature in accordance with the outside air temperature will be described.

(Cooling operation in the refrigerator compartment 1)
FIG. 12 is a flowchart showing a cooling operation in the refrigerator compartment 1 of the refrigerator-freezer according to Embodiment 2 of the present invention.

(S9)
The control device 15 receives the outside air temperature Tg detected by the outside air temperature sensor 1j.

(S10)
The control device 15 determines whether or not the outside air temperature Tg is lower than a predetermined temperature (for example, 20 ° C.). As a result of the determination, if the outside air temperature Tg is lower than the predetermined temperature, the process proceeds to step S1a. On the other hand, if the outside air temperature Tg is equal to or higher than the predetermined temperature, the process proceeds to step S1b.

(S1a)
The control device 15 includes an open temperature T0 (for example, 10 ° C.) and a second predetermined value, which are first predetermined values that serve as a reference for switching the refrigerator-side ceiling baffle 16b of the refrigerator-use twin duct damper 16 to the open state. And an opening temperature difference Td (for example, 8K) and a closing temperature Te (for example, 6 ° C.), which is a third predetermined value serving as a reference for switching the refrigerator compartment ceiling baffle 16b to the closed state, are described later. The temperature is set higher than the value set in step S1b.

(S1b)
The control device 15 sets the open temperature T0 (for example, 8 ° C.), the open temperature difference Td (for example, 6K), and the close temperature Te (for example, 4 ° C.) to temperatures lower than the values set in step S1a.

(S4)
The control device 15 determines whether or not the ceiling temperature T1 is equal to or higher than the open temperature T0. As a result of the determination, if it is determined that the ceiling temperature T1 is equal to or higher than the open temperature T0, the process proceeds to step S5. On the other hand, when it is determined that the ceiling temperature T1 is lower than the open temperature T0, the process returns to step S9.

(S5)
The control device 15 determines whether or not the difference T1-T2 between the ceiling temperature T1 and the back side temperature T2 is equal to or greater than the open temperature difference Td. As a result of the determination, if it is determined that the difference T1-T2 is equal to or greater than the open temperature difference Td, the process proceeds to step S6. On the other hand, if it is determined that the difference T1-T2 is less than the open temperature difference Td, the process returns to step S9.

(S7)
The control device 15 determines whether or not the ceiling temperature T1 is lower than the closing temperature Te. As a result of the determination, if it is determined that the ceiling temperature T1 is lower than the closing temperature Te, the process proceeds to step S8. On the other hand, if it is determined that the ceiling temperature T1 is equal to or higher than the closing temperature Te, the process returns to step S9.

(S8)
The control device 15 is such that the ceiling temperature T1 on the ceiling side and the front part in the refrigerator compartment 1 is sufficiently cooled, and the temperature between the ceiling temperature T1 on the ceiling side and the front part in the refrigerator compartment 1 and the back side temperature T2 on the back side. It is determined that the difference has become small, the refrigerator baffle ceiling baffle 16b is closed, and the process returns to step S9. Since the cold room baffle 16b for the refrigerator compartment is closed, no cold air flows into the ceiling air outlet 17e, so the amount of cold air blown out from the outlet 17c on the back side of the refrigerator compartment 1 increases and the inside of the refrigerator compartment 1 is increased. Since the time to cool becomes short, it becomes possible to suppress the power consumption of a refrigerator-freezer.

  The operations in steps S2, S3 and S6 are the same as those in the first embodiment.

(Effect of Embodiment 2)
As described above, even if the food load factor is the same, the amount of heat leakage changes depending on the outside air temperature. When the outside air temperature Tg is small, the open temperature T0, the open temperature difference Td, and the close temperature Te are set small. When the outside air temperature Tg is large, the open temperature T0 and the open temperature difference are determined. By setting Td and the closing temperature Te large, fine cooling operation of the refrigerator compartment 1 becomes possible.

  In FIG. 12, the operation of switching the open temperature T0, the open temperature difference Td, and the close temperature Te to two patterns by the threshold value determination of the outside air temperature Tg is shown, but the present invention is not limited to this. A plurality of (predetermined temperatures in step S10) may be set, and the operation may be switched to any of three or more patterns. As a result, a fine cooling operation of the refrigerator compartment 1 becomes possible.

Embodiment 3 FIG.
The refrigerator-freezer according to the present embodiment will be described with a focus on differences from the operation of the refrigerator-freezer according to Embodiment 2. The configuration of the refrigerator-freezer according to the present embodiment is the same as that of the refrigerator-freezer according to Embodiment 1. In the refrigerator-freezer according to the present embodiment, the operation for controlling the rotational speeds of the blower fan 11 and the compressor 19 together with the baffle 16b for the refrigerator compartment ceiling will be described.

(Cooling operation in the refrigerator compartment 1)
FIG. 13: is a flowchart which shows the cooling operation | movement in the refrigerator compartment 1 of the refrigerator-freezer which concerns on Embodiment 3 of this invention.

(S5)
The control device 15 determines whether or not the difference T1-T2 between the ceiling temperature T1 and the back side temperature T2 is equal to or greater than the open temperature difference Td. As a result of the determination, if it is determined that the difference T1-T2 is equal to or greater than the open temperature difference Td, the process proceeds to step S6a. On the other hand, if it is determined that the difference T1-T2 is less than the open temperature difference Td, the process returns to step S9.

(S6a)
The control device 15 determines that the ceiling temperature T1 on the ceiling side and the front side in the refrigerator compartment 1 is larger than the back side temperature T2, and that temperature unevenness occurs in the refrigerator compartment 1, and for the refrigerator compartment ceiling side. The baffle 16b is opened, and the rotational speeds of the blower fan 11 and the compressor 19 are increased. When the refrigerator side ceiling baffle 16b is in the open state, the cold air flows through the ceiling side blowing air passage 17e, and the cold air is blown into the refrigerator room 1 through the front outlet 6c and the outlet 6d. The ceiling side and the front part in 1 are cooled. Further, by increasing the rotation speed of the blower fan 11 and the compressor 19, the cooling capacity can be improved, and the ceiling side and the front part in the refrigerator compartment 1 can be quickly cooled, and the temperature unevenness in the refrigerator compartment 1 can be improved. Can be eliminated.

(S7)
The control device 15 determines whether or not the ceiling temperature T1 is lower than the closing temperature Te. As a result of the determination, when it is determined that the ceiling temperature T1 is lower than the closing temperature Te, the process proceeds to step S8a. On the other hand, if it is determined that the ceiling temperature T1 is equal to or higher than the closing temperature Te, the process returns to step S9.

(S8a)
The control device 15 is such that the ceiling temperature T1 on the ceiling side and the front part in the refrigerator compartment 1 is sufficiently cooled, and the temperature between the ceiling temperature T1 on the ceiling side and the front part in the refrigerator compartment 1 and the back side temperature T2 on the back side. It is determined that the difference has become small, the refrigerator baffle ceiling baffle 16b is closed, and the rotational speeds of the blower fan 11 and the compressor 19 are returned to normal states, and the process returns to step S9. Since the cold room baffle 16b for the refrigerator compartment is closed, no cold air flows into the ceiling air outlet 17e, so the amount of cold air blown out from the outlet 17c on the back side of the refrigerator compartment 1 increases and the inside of the refrigerator compartment 1 is increased. Since the time to cool becomes short, it becomes possible to suppress the power consumption of a refrigerator-freezer.

  The operations in steps S1a, S1b, S2 to S4, S9 and S10 are the same as those in the second embodiment.

(Effect of Embodiment 3)
As described above, in addition to having the effect of the second embodiment, the refrigerator compartment ceiling baffle 16b is opened and cooling is performed by increasing the rotational speed of the blower fan 11 and the compressor 19. The capacity can be improved, and the ceiling side and the front part in the refrigerator compartment 1 can be quickly cooled, and the temperature unevenness in the refrigerator compartment 1 can be eliminated.

  In the flowchart shown in FIG. 13, in step S6a, the refrigerator side ceiling baffle 16b is opened and the rotation speed of the blower fan 11 and the compressor 19 is increased. However, the present invention is not limited to this. It is good also as what raises the rotation speed of either the ventilation fan 11 or the compressor 19, not what is carried out. This also improves the cooling capacity.

  1 refrigerator compartment, 1a to 1d shelf, 1e refrigerator compartment door, 1f hinge device, 1g door pocket, 1h operation panel, 1i substrate, 1j outside air temperature sensor, 1k accessory storage case, 2 ice making room, 2a automatic ice making machine, 2b ice making Case, 2c Single duct damper for ice making room, 2d Temperature sensor, 3 Switching room, 3a Switching room case, 3b Twin duct damper for switching room, 3c Temperature sensor, 4 Freezer room, 4a Lower large storage case, 4b Upper shallow case 5 Vegetable room, 5a Lower storage case, 5b Upper storage case, 6 Ceiling duct, 6a Cover, 6b Anti-dew heat insulation, 6c Front outlet, 6d Outlet, 7 LED lighting cover, 8 Substrate, 9 Ceiling temperature sensor 10 fan grill, 10a heat insulating material, 10b, 10c resin parts, 11 blower fan , 12 cooler, 13 defrost heater, 14 drain pipe, 15 control device, 16 twin duct damper for refrigeration room, 16a baffle for back side of refrigeration room, 16b baffle for ceiling side of refrigeration room, 17 control panel, 17a resin parts , 17b Foamed part, 17c Outlet, 17d Back side outlet, 17e Ceiling side outlet, 18 Temperature sensor, 19 Compressor, 101 Refrigeration room, 101a to 101d Shelf, 101g Top door pocket, 102 Ice making Room, 103 switching room, 104 freezer room, 105 vegetable room, 111 fan, 112 cooler, 117d back side air path, 118 back side temperature sensor, 119 compressor, 120 twin duct damper, 121 baffle, 122 frame, 123 Gearbox, 124 food.

Claims (9)

A refrigerated room for refrigerated food,
A back-side blowout air passage for blowing out cold air from the inside of the refrigerator compartment into the refrigerator compartment;
A ceiling-side blowing air passage for blowing cold air from the refrigerator compartment ceiling side into the refrigerator compartment;
An air volume adjusting device that adjusts the amount of cool air to be circulated to the back side blowing air path and the ceiling side blowing air path;
A blower fan for sending cool air to the back side air duct and the ceiling side air duct;
A back side temperature detection means for detecting a back side temperature, which is installed at the back side in the refrigerator compartment and is the inside temperature of the back side in the refrigerator compartment;
A ceiling-side temperature detecting means that is installed on the front side and the upper side of the refrigeration room, and detects a ceiling side temperature that is a temperature inside the ceiling side and the front side of the refrigeration room;
Based on the back side temperature detected by the back side temperature detection means and the ceiling side temperature detected by the ceiling side temperature detection means, the air volume adjusting device is controlled, and the back side blowing air path and A control device for controlling the amount of cold air blown out from the ceiling side blowing air passage into the inside of the refrigerator compartment;
Equipped with a,
The control device is configured such that the ceiling-side temperature detected by the ceiling-side temperature detection unit is equal to or higher than a first predetermined value, and the difference between the ceiling-side temperature and the back-side temperature detected by the back-side temperature detection unit. When the air volume is equal to or greater than a second predetermined value, the air flow adjusting device causes the cool air to be blown into the ceiling side blowing air passage and blown out from the ceiling side of the refrigerator compartment . When the ceiling-side temperature detected by the ceiling-side temperature detection means is less than a third predetermined value, the control device stops the supply of cold air to the ceiling-side blowout air path with respect to the air volume adjusting device. The refrigerator-freezer according to claim 1, wherein: An outside temperature detecting means for detecting outside temperature is provided,
The refrigerator according to claim 1 or 2 , wherein the control device switches and sets the predetermined value based on the outside air temperature detected by the outside air temperature detecting means. The control device sets the predetermined value when the outside air temperature detected by the outside air temperature detecting means is lower than a predetermined outside air temperature, and the predetermined value corresponding to the case where the outside air temperature is higher than the predetermined outside air temperature. Is set to a small value. The refrigerator-freezer according to claim 3 . A refrigerated room for refrigerated food,
A back-side blowout air passage for blowing out cold air from the inside of the refrigerator compartment into the refrigerator compartment;
A ceiling-side blowing air passage for blowing cold air from the refrigerator compartment ceiling side into the refrigerator compartment;
An air volume adjusting device that adjusts the amount of cool air to be circulated to the back side blowing air path and the ceiling side blowing air path;
A blower fan for sending cool air to the back side air duct and the ceiling side air duct;
A back side temperature detection means for detecting a back side temperature, which is installed at the back side in the refrigerator compartment and is the inside temperature of the back side in the refrigerator compartment;
A ceiling-side temperature detecting means that is installed on the front side and the upper side of the refrigeration room, and detects a ceiling side temperature that is a temperature inside the ceiling side and the front side of the refrigeration room;
A compressor for compressing refrigerant flowing through the refrigeration cycle;
Based on the back side temperature detected by the back side temperature detection means and the ceiling side temperature detected by the ceiling side temperature detection means, the air volume adjusting device is controlled, and the back side blowing air path and A control device for controlling the amount of cold air blown out from the ceiling side blowing air passage into the inside of the refrigerator compartment;
Equipped with a,
The said control apparatus makes the rotation speed of the said ventilation fan and the said compressor increase, when making cold air blow out from the said ceiling side blowing air path with respect to the said air volume adjusting device, The refrigerator refrigerator characterized by the above-mentioned . The refrigerator-freezer according to any one of claims 1 to 5, wherein the refrigerator compartment is disposed at an uppermost part of a refrigerator-freezer main body. The refrigerator-freezer according to any one of claims 1 to 6, wherein the ceiling-side blow-off air passage includes a front blow-out port for blowing out cold air from the refrigerator compartment ceiling side to a front portion of the refrigerator compartment. . The refrigerating chamber, the freezing refrigerator according to any one of claims 1 to 7, characterized in that with one or more shelves. The ceiling side blowoff air trunk is refrigerator according to any one of claims 1-8, characterized in that arranged in the substantially central portion in the width direction of the refrigerator body.