JP5909427B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator.

  As a background art in this technical field, there is JP 2012-26677 A (Patent Document 1). The refrigerator described in Patent Literature 1 includes a back side blowout air passage that blows out cold air from the back side of the refrigerator compartment, and a ceiling side blowout air passage that blows out cold air from the ceiling surface side of the refrigerator compartment, and a refrigerator in the back side of the refrigerator compartment Based on the values of the back side temperature sensor that detects the inside temperature and the ceiling side temperature sensor that detects the inside temperature of the ceiling side and the front part of the refrigerator compartment, the air is blown to the back side air duct and the ceiling side air duct. The amount of cold air is controlled by an air volume adjustment device (twin duct damper).

JP 2012-26677 A

  In the refrigerator described in Patent Document 1, the air volume adjusting device (twin duct damper) that controls the blowing of cool air to the ceiling side blowing air path and the back side blowing air path is a ceiling side temperature sensor and a back side temperature sensor, respectively. Control is based on the detected temperature. The back side temperature sensor that measures the temperature of the back side of the refrigerating room is a refrigerating room in which a back blowing air passage is formed in the vicinity of the center in the height direction of the refrigerating room so that the temperature of the whole refrigerating room can be represented. It is installed on the back panel wall.

  When the amount of food stored increases, the temperature on the ceiling side becomes equal to or higher than the predetermined temperature, and the temperature difference between the ceiling side temperature sensor and the back side temperature sensor also increases, so cold air is blown into the ceiling side blowing air passage. . Since the cool air is blown out by the ceiling side blowing air passage, when the temperature detected by the ceiling side temperature sensor reaches a predetermined temperature, the blowing of the cold air to the ceiling side blowing air passage is stopped. As a result, the temperature distribution in the refrigerator compartment is suppressed, and the cooling performance is ensured even when food is stuffed too much.

  However, in the case of cooling while switching the two cold air passages and suppressing the temperature distribution of the entire refrigerator compartment, the following points are problems in the refrigerator described in Patent Document 1. For the purpose of suppressing the temperature distribution in the refrigerator compartment, the temperature detected by the ceiling side temperature sensor is, for example, 10 ° C. or more, and the difference between the temperatures detected by the ceiling side temperature sensor and the back side temperature sensor is, for example, 8 ° C. or more. In this case, it is determined that the temperature distribution in the refrigerator compartment is large, and the refrigerator compartment is cooled by blowing cool air using the ceiling side blowing air passage.

  Here, when foods with a high temperature or many foods are stored near the ceiling side temperature sensor at the same time, the ceiling side temperature sensor is affected by them, so the temperature detected by the ceiling side temperature sensor is predetermined. It takes a long time to decrease the temperature. Food placed near the ceiling-side temperature sensor will be cooled to an appropriate temperature. On the other hand, for example, ice-making water tanks (water tanks for ice making) and small items provided under the bottom shelf of the refrigerator compartment The case may be overcooled and freeze. In order to avoid freezing, it is necessary to heat with an electric heater so as to keep the temperature above a predetermined temperature, and problems are likely to occur not only from the influence on the quality of food but also from the viewpoint of reliability and energy saving.

  In addition, the cold air blown out by the back blowing air passage is performed until the temperature detected by the back side temperature sensor of the refrigerating room reaches a predetermined temperature, but on the shelf near the back side temperature sensor of the refrigerating room. When food with a high temperature or a large amount of food is stored at one time, the rate of decrease in temperature detected by the back side temperature sensor will slow down. Continue to be cooled by. In such a case as well, the temperature of the ice-making water tank and the accessory case provided in the lower part of the refrigerator compartment is lowered and the possibility of freezing occurs.

  As described above, in the refrigerator described in Patent Document 1, the twin ducts connected to the ceiling-side blowing air path and the back-side blowing air path based on the temperatures detected by the ceiling-side temperature sensor and the back-side temperature sensor, respectively. The damper is controlled to open and close to cool the temperature distribution in the refrigerator compartment. However, no consideration is given to the freezing of water in an ice-making water tank provided in the lower part of the refrigerator compartment, and the excessive cooling or freezing of food in a small case.

  The present invention has been made in view of the above problems, and by appropriately detecting the temperature in the storage chamber by the temperature detection means, the preservation and reliability of food are improved, and the energy saving property is improved. The purpose is to provide a high refrigerator.

In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-described problems. For example, a storage room in a refrigerated temperature zone, a plurality of shelves provided in the storage room, and the plurality of shelves are formed. A first cold air duct and a second cold air duct for supplying cold air to at least one of the spaces, a blowing means for blowing cold air into each of the first cold air duct and the second cold air duct, and the first In the refrigerator comprising: a first air volume adjusting device that controls the air flow of the cold air duct; and a second air volume adjusting device that controls the air flow of the second cold air duct. Cold air is supplied by the second cold air duct between the first region to which the cold air from the second cold air duct is supplied, the shelf provided at the uppermost stage in the storage chamber, and the upper wall of the storage chamber. A second region to be placed on the top level of the storage chamber A third region to which cold air is supplied by the first cold air duct between the first shelf and the shelf provided at the lowest stage, and a first temperature detecting means in the first region And when the temperature detected by the first temperature detecting means reaches a preset temperature or less, the blowing of either the first cold air duct or the second cold air duct is stopped. And

  According to the present invention, by appropriately detecting the temperature in the storage chamber by the temperature detection means, it is possible to provide a refrigerator with improved energy conservation by improving the storability and reliability of food.

It is a front view of the refrigerator which concerns on 1st embodiment of this invention. It is AA sectional drawing of FIG. It is a front view of the refrigerator compartment in the state where the refrigerator compartment door concerning a first embodiment of the present invention was omitted. It is BB sectional drawing of FIG. It is a front view of the refrigerator compartment duct which concerns on 1st embodiment of this invention. It is a rear view of the refrigerator compartment duct which concerns on 1st embodiment of this invention. It is CC sectional drawing of FIG. It is the figure which showed typically the flow of the cool air which goes to a refrigerator compartment from a 1st cold air duct. It is the figure which showed typically the flow of the cold air which goes to a refrigerator compartment from a 2nd cold air duct. It is the figure which showed typically the flow of the cool air which goes to a refrigerator compartment from a 1st cold air duct and a 2nd cold air duct. It is a temperature chart at the time of the cooling operation of the refrigerator compartment which concerns on 1st embodiment of this invention. It is a temperature chart at the time of the cooling operation of the refrigerator compartment which concerns on 1st embodiment of this invention. It is a temperature chart at the time of the cooling operation of the refrigerator compartment which concerns on 1st embodiment of this invention. It is a temperature chart at the time of the cooling operation of the refrigerator compartment which concerns on 1st embodiment of this invention. It is the figure which showed typically the flow of the cool air at the time of cooling a refrigerator compartment with a 1st cold air duct and a 2nd cold air duct when there are many foodstuffs before a discharge outlet. It is the figure which showed typically the flow of the cool air at the time of cooling a refrigerator compartment with a 2nd cold air duct when there are many foodstuffs before a discharge outlet. It is a figure explaining the 1st temperature sensor installed in the refrigerator compartment which concerns on 2nd embodiment of this invention. It is a temperature chart at the time of the cooling operation of the refrigerator compartment which concerns on 2nd embodiment of this invention. It is a figure explaining the 1st temperature sensor installed in the refrigerator compartment which concerns on 3rd embodiment of this invention. It is a temperature chart at the time of the cooling operation of the refrigerator compartment which concerns on 3rd embodiment of this invention.

(First embodiment)
A first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view of the refrigerator according to the first embodiment of the present invention. As shown in FIG. 1, the refrigerator 1 of this embodiment is comprised from the upper part from the refrigerator compartment 2 (storage room of a refrigerator temperature zone), the freezer compartment 7, and the vegetable compartment 6. As shown in FIG. The freezer compartment 7 includes a lower freezer compartment 5, and an ice making room 3 and an upper freezer compartment 4 provided on the left and right above the lower freezer compartment 5.

  The refrigerating room 2 includes left and right refrigerating room doors 2a and 2b. The ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 are a pull-out ice making room door 3a and an upper freezing room door, respectively. 4a, a lower freezer compartment door 5a, and a vegetable compartment door 6a. Hereinafter, the refrigerator compartment doors 2a and 2b, the ice making door 3a, the upper freezer compartment door 4a, the lower freezer compartment door 5a, and the vegetable compartment door 6a may be simply referred to as doors 2a, 2b, 3a, 4a, 5a, and 6a. is there. A door hinge that fixes the refrigerator 1 and the refrigerator compartment doors 2 a and 2 b is provided on the upper portion of the refrigerator 1, and the door hinge is covered with a door hinge cover 53.

  2 is a cross-sectional view taken along the line AA in FIG. FIG. 3 is a front view of the refrigerator compartment in a state where the refrigerator compartment door according to the first embodiment of the present invention is omitted. 4 is a cross-sectional view taken along line BB in FIG.

  The outside of the refrigerator 1 and the inside of the refrigerator are separated by a heat insulating box 10 formed by filling a foam heat insulating material between the outer box 10a and the inner box 10b. In addition to the foam heat insulating material, a plurality of vacuum heat insulating materials 25 are mounted on the heat insulating box 10 between the outer box 10a and the inner box 10b.

In each storage room, the refrigerator compartment 2 is separated from the upper freezer compartment 4 and the ice making chamber 3 by the upper heat insulating partition wall 28, and the lower freezer compartment 5 and the vegetable compartment 6 are similarly separated by the lower heat insulating partition wall 29. ing.
A plurality of door pockets 33a, 33b, 33c are provided in order from the top inside the refrigerator compartment doors 2a, 2b, and the refrigerator compartment 2 has a plurality of shelves 34a, 34b, 34c, 34d, 34e, 34f in order from the top. It is provided (see FIG. 3) and is partitioned into a plurality of storage spaces. Note that the term “shelf 34” may be used as a collective term.

  A heat insulating partition wall 40 of the freezer compartment 7 is provided between the upper freezer compartment 4 and the ice making compartment 3 and the lower freezer compartment 5. The upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 are provided with storage containers 4b, 5b, 6b that move integrally with the doors 4a, 5a, 6a provided in front of the respective compartments. , 5a, 6a are pulled out to the front side so that the storage containers 4b, 5b, 6b can also be pulled out. The ice making chamber 3 is also provided with a storage container that moves integrally with the door 3a, and the storage container 3b can be pulled out by pulling the door 3a to the front side. Moreover, the outside temperature sensor 52 is provided in the inside of the door hinge cover 53 of the refrigerator 1 as a position which avoided the temperature influence of the refrigerator 1, for example.

  The cooler 14 is provided in a cooler storage chamber 8 provided substantially at the back of the lower freezer compartment 5, and exchanges heat with the cooler 14 by an internal fan 9 that is a blowing means provided above the cooler 14. The chilled air passes through the refrigerator compartment cold air duct 11 (first cold air duct 11a, second cold air duct 11b), the upper freezer compartment cold air duct 12, the lower freezer compartment air duct 13, and the ice making room air duct (not shown). , The refrigerator compartment 2, the upper freezer compartment 4, the lower freezer compartment 5, and the ice making compartment 3.

  The blowing of cool air to each storage room is controlled by opening and closing of the air volume adjusting device, that is, the refrigerator compartment twin damper 20 (20a, 20b) and the freezer compartment damper 60. The refrigerating room twin damper 20 is a so-called twin baffle type damper having two baffles 20a and 20b, and adjusts the air volume by opening and closing the baffles 20a and 20b by a motor drive unit 46 (see FIG. 3).

  In the case of the refrigerating room cooling operation for cooling the refrigerating room 2, the refrigerating room twin damper 20 is opened, the freezing room damper 60 is closed, and refrigerating is performed from the discharge ports 30 a, 30 b, 30 c, 31, 32 through the refrigerating room duct 11. Cold air is sent to chamber 2. The cold air after circulating through the refrigerator compartment 2 flows into the refrigerator compartment return port 39 (see FIG. 3) provided at the lower part of the refrigerator compartment 2, and then returned to the cooler 14.

  There are various methods for cooling the vegetable compartment 6, for example, a method of sending cold air to the vegetable compartment 6 after cooling the refrigerator compartment 2, or a cooler 14 using an air volume adjusting device (damper) dedicated to the vegetable compartment. The method of sending the cold air heat-exchanged directly to the vegetable compartment 6 can be considered. In the present embodiment, any method may be used for supplying cold air to the vegetable compartment 6. In the example shown in FIG. 2, the cold air flowing into the vegetable compartment 6 is cooled from the vegetable compartment return port 18 b via the vegetable compartment return duct 18 from the vegetable compartment return port 18 a provided in front of the lower part of the heat insulating partition wall 29. Flows into the lower part of the container 14.

  In the case of the freezing room cooling operation for cooling the freezing room 7, the refrigerating room twin damper 20 is closed, the freezing room damper 60 is opened, and cold air is discharged from the discharge ports 3c, 4c, 5c, and 6c, respectively, and the upper freezing After cooling the chamber 4, the lower freezing chamber 5, and the ice making chamber 3, the chamber 4 is returned to the cooler 14 through the freezer return port 17.

  There is also an operation of cooling the refrigerator compartment 2 and the freezer compartments 4 and 5 at the same time according to the temperature in the refrigerator. In this case, both the refrigerator compartment twin damper 20 and the freezer compartment damper 60 are opened to cool each storage compartment. Blow.

  The third temperature sensor 42 for detecting the temperature of the region 2C defined by the uppermost shelf 34a, 34b and the lowermost shelf 34f, the uppermost shelf 34a, 34b and the upper wall of the refrigerator compartment 2 Cold air blown from the second temperature sensor 43 for detecting the temperature of the region 2A partitioned by the discharge port 32, 33 of the first cold air duct 11a and the discharge port 30a, 30b, 30c of the second cold air duct 11b The baffles 20a and 20b of the refrigerator compartment twin damper 20 are controlled according to the temperature detected by the first temperature sensor 44 that detects the temperature of the region 2B that circulates in common.

  A defrost heater 22 is provided below the cooler 14. The drain water generated at the time of defrosting falls once to the trough 23 and is discharged to the evaporating dish 21 provided on the upper part of the compressor 24 through the drain hole 27. In the machine room 61 provided at the lower back of the refrigerator 1, a radiator and a heat radiating fan (not shown) are arranged in addition to the compressor 24.

  A control board 51 equipped with a memory and an interface circuit is arranged behind the upper wall of the refrigerator 1, and the control of the refrigeration cycle and the air blowing system is performed according to the control means stored in the ROM of the control board 51. The control board 51 is covered with a board cover 50.

  3 and 4, the cold room cold air duct 11 including the first cold air duct 11 a and the second cold air duct 11 b is connected to the openings that are opened and closed by the baffles 20 a and 20 b of the cold room twin damper 20. Has been. When cooling by the first cold air duct 11a, the baffle 20a is opened, the baffle 20b is closed, and when cooling by the second cold air duct 11b, the baffle 20a is closed, the baffle 20b is opened, and the first cold air duct 11a is opened. The baffles 20a and 20b are respectively opened when cooling by both of the second cold air ducts 11b.

  Discharge ports 30a, 30b, and 30c are provided in the middle of the first cool air duct 11a in order from the top, and the uppermost shelves 34a and 34b and the lowermost shelf are cooled by the cool air blown from the respective discharge ports. The food placed on the region 2C (see FIGS. 2 to 4) partitioned by 34f, that is, the shelves 34c, 34d, 34e, and 34f is mainly cooled. The uppermost shelves 34a and 34b of the refrigerator compartment 2 are divided into left and right by a shelf partition 54 so that the height of each shelf can be changed. Discharge ports 31 and 32 are provided at the distal end of the second cold air duct 11b, and the region 2A (which is partitioned by the uppermost shelves 34a and 34b and the ceiling surface 63 by cool air blown from the respective discharge ports). In other words, the food placed on the shelves 34a and 34b and the door pocket 33a is mainly cooled.

  A region 2B (see FIG. 2 and FIG. 4) is a region partitioned by the peripheral portions of the door pockets 33b and 33c in front of the shelves 34c, 34d, 34e, and 34f, the lowermost shelf 34f, and the upper heat insulating partition wall 28. Then, the area 2B is commonly cooled by the cold air from both the first cold air duct 11a and the second cold air duct 11b. Moreover, it becomes an area | region which is easy to cool by the influence of the freezer compartment 7 provided in the lower part of the refrigerator compartment 2. In the region 2B and above the upper heat insulating partition wall 28, an ice making water tank 36 and a decompression storage chamber 35 are provided. A discharge port 38 is provided below the second cold air duct 11b (see FIG. 3), and the decompression storage chamber 35 in front of the discharge port 38 is cooled.

  The temperature in the decompression storage chamber 35 can be set from the outside, and the decompression storage chamber 35 is cold air from a discharge port 38 (with an air volume adjusting device (damper)) provided on the back side of the decompression storage chamber 35. The temperature is adjusted according to the temperature detected by the first temperature sensor 44 provided on the back side of the.

  The cold air blown into the refrigerator compartment 2 is returned to the cooler 14 via the refrigerator compartment return port 39 and cooled again.

  The decompression storage chamber 35 provided in the lower part of the refrigerator compartment 2 is provided with a decompression pump (not shown) in order to reduce the internal pressure, and in order to maintain the internal pressure, the door 56 of the decompression storage chamber is The handle 55 can be locked (see FIGS. 3 and 4).

Although FIG. 3 shows the refrigerator compartment 2 provided with the decompression storage chamber 35 as an example, it is generally provided with a chilled room set in a temperature zone lower than the temperature zone of the refrigerator compartment 2. There are many.
The decompression storage chamber 35 also stores food in substantially the same temperature range as the chilled room.

  Here, since the ice making water tank 36 and the decompression storage chamber 35 are generally provided under the lowest shelf 34f of the refrigeration chamber, it is necessary to control the temperature so as not to freeze.

In the present embodiment, the third temperature sensor 42, the uppermost shelves 34a, 34b, and the refrigerator compartment 2 provided in the region 2C defined by the uppermost shelves 34a, 34b and the lowermost shelf 34f of the refrigerator compartment 2 are used. Cold air blown from the second temperature sensor 43 provided in the region 2A defined by the upper wall, the discharge ports 31 and 32 of the first cold air duct 11a, and the discharge ports 30a, 30b and 30c of the second cold air duct 11b Are provided in a region 2B that circulates in common. For example, the third temperature sensor 42 is located between the second temperature sensor 43 and the first temperature sensor 44, and is a rear member 47 that forms the refrigerating room cool air duct 11 provided on the back side of the refrigerating room 2. Provided on the surface.
The second temperature sensor 43 is provided on the upper wall 63 of the refrigerator compartment 2. The first temperature sensor 44 is provided on the surface of the back member 47 that forms the refrigerator compartment cool air duct 11 in a region defined by the lowermost shelf 34 f and the upper heat insulating partition wall 28.

  The third temperature sensor 42 is a region 2A defined by the uppermost shelves 34a and 34b and the lowermost shelf 34f of the refrigerator compartment 2, and the second temperature sensor 43 is an uppermost shelf 34a and 34b. The area 2C defined by the ceiling surface 63, the first temperature sensor 44, detects the temperature of the area 2B in which the cold air blown from the discharge ports of the first cold air duct 11a and the second cold air duct 11b circulates in common. If it can be detected, the position is not necessarily limited to this position. Furthermore, you may provide the cover which covers and protects at least one part of each temperature sensor.

  5 and 6 are enlarged views of the cold room cold air duct 11 (first cold air duct 11a and second cold air duct 11b), and are a front view and a rear view, respectively. 7 is a cross-sectional view taken along the line CC of FIG.

  The first cold air duct 11a and the second cold air duct 11b have an air passage formed of, for example, a heat insulating material such as a polystyrene foam 41, and discharge ports 30a and 30b are formed in a part of the first cold air duct 11a. 30c and discharge ports 31 and 32 are formed in part of the second cold air duct 11b, respectively. The back side of the first cold air duct 11a and the second cold air duct 11b is connected to the back member 47 using a seal member 62, respectively. The first cold air duct 11a and the second cold air duct 11b formed of the polystyrene foam 41 are combined with a panel-shaped back member 47 formed of resin, for example, and are installed on the back side of the refrigerator compartment 2. The first cold air duct 11a has a larger channel cross-sectional area than the second cold air duct 11b, and the first cold air duct 11a is connected to the baffle 20a side where the open area of the refrigerating room twin damper 20 is large, The food on the shelves 34c, 34d, 34e, 34f, which is frequently used in the refrigerator 2, can be efficiently cooled. A third temperature sensor 42 and a first temperature sensor 44 are provided on the back member 47 that forms the refrigerator compartment cool air duct 11.

  FIG. 8a shows a case where the first cold air duct 11a is cooled, FIG. 8b shows a case where the second cold air duct 11b is cooled, and FIG. 8c shows that the first cold air duct 11a and the second cold air duct 11b are used simultaneously. FIG. 4 schematically shows the flow of the cold air when cooled.

  The invasion of heat from the outside of the refrigerator compartment 2 is a phenomenon caused by the temperature difference between the wall surface in the refrigerator compartment 2 and the outside air. The average temperature of the refrigerator compartment 2 is maintained at a plus temperature of about 5 ° C. as an example, but the cold air from the discharge port of the refrigerator compartment 2 may become a negative temperature, and the discharged cold air is used as the wall surface in the refrigerator compartment 2. When it circulates along the wall, the wall surface is cooled and the temperature becomes lower. For this reason, the heat intrusion from the outside becomes large, which may cause an increase in power consumption.

  For example, when the outside air is 30 ° C., the temperature in the vicinity of the control board 51 provided in the upper part of the refrigerator compartment 2 is about 40 ° C., and excessive cooling of the upper wall 63 of the refrigerator compartment 2 causes a larger temperature difference between inside and outside the cabinet. As a result, the energy-saving property deteriorates.

  In a conventional general refrigerator, cold air is constantly circulated along the upper wall surface and side wall surface of the refrigerator compartment 2 from the vicinity of the front end of the refrigerator compartment duct, and the upper door pocket 33a, the uppermost shelf 34a, The refrigerator 2 is cooled as a whole after the food placed on 34b is cooled. Therefore, the deterioration of energy saving property by the excessive wall surface in the refrigerator compartment 2 becomes a subject.

  In the cooling system of the present embodiment, two cold air ducts provided for the refrigerator compartment 2 based on the temperatures detected by the third temperature sensor 42, the second temperature sensor 43, and the first temperature sensor 44, that is, Further, by switching and using the first cold air duct 11a and the second cold air duct 11b in which the ratio of the cold air flow rate is increased, it is possible to perform a cooling operation that suppresses excessive cooling of the wall surface and enhances energy saving.

  FIG. 8a shows the flow of cold air in the refrigerator compartment 2 when cooled by the first cold air duct 11a. The baffle 20a of the refrigerating room twin damper 20 is opened (the baffle 20b is closed), and cold air is discharged from the discharge ports 30a, 30b, 30c provided in the first cold air duct 11a, and mainly the uppermost shelves 34a, 34b. After cooling the food placed in the region 2C partitioned by the lowermost shelf 34f, that is, the shelves 34c, 34d, 34e, 34f in the frequently used place, then the door pockets 33b, 33c and the lowermost shelf 34f In this cooling method, the region 2B partitioned by the shelf 34f and the upper heat insulating partition wall 28 is cooled, placing importance on energy saving.

  On the other hand, as shown in FIG. 8b, the cold air in the refrigerating chamber 2 by the second cold air duct 11b opens the baffle 20b of the refrigerating chamber twin damper 20 (the baffle 20a is closed), and the upper wall 63 of the refrigerating chamber 2 Circulating along the vicinity, after cooling the area 2A which is the area of the door pocket 33a of the upper stage of the refrigerator compartment doors 2a, 2b, and the area partitioned mainly by the uppermost shelves 34a, 34b and the upper wall 63, The region 2B defined by the middle door pockets 33b and 33c, the lowermost shelf 34f, and the heat insulating partition wall 28 is cooled.

  Furthermore, as shown in FIG. 8 c, both the baffles 20 a and 20 b of the refrigerating room twin damper 20 are opened, and both the first cold air duct 11 a and the second cold air duct 11 b are used to cool the cold air duct of the refrigerating room 2. The same cooling as before can be performed without dividing. In this case, the region 2B defined by the door pockets 33b and 33c, the lowermost shelf 34f, and the heat insulating partition wall 28 has discharge ports 30a, 30b, and 30c of the first cold air duct 11a and the second cold air duct 11b. Since the cool air blown from the discharge ports 31 and 32 circulates in common, it becomes easy to be cooled.

  Specific temperature control using the first cold air duct 11a and the second cold air duct 11b will be described below. However, according to the intention of the user, the power saving operation in which the energy saving operation is further advanced should be performed. Can do. After cooling a shelf (food) that is frequently used, the first cold air duct 11a for cooling the periphery of the shelf and the second cold air duct 11b that cools the whole from the upper space of the refrigerator compartment 2 Since the food is divided, when the food is not placed in the upper part of the refrigerator compartment 2, that is, the uppermost shelves 34a, 34b or the upper door pocket 33a, which is relatively infrequently used, the user can use the upper space of the refrigerator compartment The set value of the second temperature sensor 43 that detects the temperature of the second temperature sensor 43 can be increased, and a power saving operation can be performed in which only the temperature of the upper space of the refrigerator compartment 2 is increased.

  Next, a cooling method when the first cold air duct 11a and the second cold air duct 11b are used will be described using a temperature chart.

  FIG. 9 is a temperature chart during the cooling operation of the refrigerator compartment according to the first embodiment of the present invention. For example, when the temperature detected by the third temperature sensor 42 reaches (TR1) Max, the baffle 20a of the refrigerator compartment twin damper 20 is opened and the first cold air duct is started. Cold air is blown into the refrigerator compartment 2 at 11a. Similarly, when the temperature detected by the second temperature sensor 43 reaches (TR2) Max, the baffle 20b of the refrigerating room twin damper 20 is opened and the cold air is blown into the refrigerating room 2 by the second cold air duct 11b. To do. In FIG. 9, as an example, the cooling by the first cold air duct 11a and the second cold air duct 11b starts at the time t1, but it does not necessarily have to start simultaneously.

  However, since the same refrigerating chamber 2 is cooled by the two cooling means of the first cold air duct 11a and the second cold air duct 11b, the timing of ending the cooling of the refrigerating chamber 2 is important.

  At time t2, for example, high temperature food is stored in the uppermost shelves 34a, 34b, the door pocket 33a, etc. near the second temperature sensor 43, many foods are brought in, and the doors 2a, 2b. The temperature detected by the second temperature sensor 43 increases once due to an increase in the thermal load, and then passes for a while when it is frequently opened and closed (hereinafter collectively referred to as “high load state”). Then the temperature drops. The temperature when closing the baffle 20b and stopping the blowing of the cold air from the second cold air duct 11b, that is, the time (time t3) until reaching (TR2) Min becomes longer. The surroundings of the ice-making water tank 36 and the decompression storage chamber 35 provided in the lower part (area 2B; see FIG. 3) continue to be cooled at the same time. Therefore, the temperature around the ice-making water tank 36 and the decompression storage chamber 35 detected by the first temperature sensor 44 is a lower limit at which the water in the ice-making water tank 36 and the food in the decompression storage chamber 35 are not frozen. When the temperature, that is, (TR3) Min at time t4 is reached, the second cold air is closed by closing the baffle 20b even before the temperature detected by the second temperature sensor 43 reaches (TR2) Min. Cooling by the duct 11b is terminated. When the temperature detected by the third temperature sensor 42 reaches (TR1) Min (time t5), the baffle 20a is closed and the cooling by the first cold air duct 11a is ended.

  Thus, in the cooling method of the refrigerator compartment of this embodiment, since the same refrigerator compartment 2 is cooled by dividing | segmenting into the 1st cold air duct 11a and the 2nd cold air duct 11b, it is 2nd cold air The opening / closing control of the baffle 20b of the refrigerating room twin damper 20 supplied to the duct 11b needs to refer to the second temperature sensor 43 and the first temperature sensor 44.

  Next, FIG. 10 is a temperature chart during the cooling operation of the refrigerating room according to the first embodiment of the present invention, and is a diagram showing control different from FIG.

  In FIG. 9, it has been described that the second temperature sensor 42 and the first temperature sensor 44 are referred to for the opening / closing control of the baffle 20b of the second cold air duct 11b, but similarly, the baffle 20a of the first cold air duct 11a is referred to. In the open / close control, there is a case where the temperature detected by the first temperature sensor 44 is referred to.

  In FIG. 10, as an example, at time t1, the baffle 20a and the baffle 20b of the refrigerating room twin damper 20 are opened, and cooling of the refrigerating room 2 is started by the first cold air duct 11a and the second cold air duct 11b. ing. After that, at time t2, if the shelves 34c, 34d, 34e, and 34f near the place where the third temperature sensor 42 is installed are in a high load state, the third temperature sensor 42 detects them. The temperature rises once and then decreases after a while. The temperature at which the cooling air from the first cold air duct 11a is stopped, that is, the time (time t5) until reaching (TR1) Min becomes longer. During this time, the ice making water tank provided at the lower part of the refrigerator compartment 2 36 and the periphery of the decompression storage chamber 35 (region 2B; see FIG. 3) are also continuously cooled.

  Therefore, the temperature around the ice making water tank 36 and the decompression storage chamber 35 whose temperature is detected by the first temperature sensor 44 is a lower limit at which the water in the ice making water tank 36 and the food in the decompression storage chamber 35 are not frozen. , That is, when (TR3) Min is reached at time t4, even if the temperature detected by the third temperature sensor 42 does not reach (TR1) Min, the baffle 20a is closed and the first Cooling by the cold air duct 11a is terminated. When such a condition is satisfied, even if the temperature detected by the second temperature sensor 43 does not reach (TR2) Min, the baffle 20b is closed and the cooling by the second cold air duct 11b is completed. Let

  Opening and closing of the baffle 20a for controlling the air volume of the first cold air duct 11a and the baffle 20b for controlling the air volume of the second cold air duct 11b are detected by the third temperature sensor 42 and the second temperature sensor 43, respectively. Based on the temperature, the temperature (TR1) Max for opening the baffle 20a, the temperature (TR1) Min for closing, the temperature (TR2) Max for opening the baffle 20b, the temperature (TR2) Min for closing the baffle 20b Is determined in advance and controlled accordingly, but detected by the first temperature sensor 44 rather than the time to reach the temperature condition (TR1) Min or (TR2) Min for closing the baffle 20a or baffle 20b. When the anti-freezing temperature, that is, (TR3) Min reaches first, the temperature (TR3) Min detected by the first temperature sensor 44 is superior. By, the baffle 20a or baffle 20b in the closed.

  When the baffle 20b is closed with priority given to the temperature (TR3) Min detected by the first temperature sensor 44 before reaching the temperature at which the baffle 20b is closed, that is, (TR2) Min. The upper space of the refrigerator compartment 2 where the temperature tends to rise due to the influence of convection is not sufficiently cooled. Therefore, after the cooling of the freezer compartments 4 and 5 is finished, when the condition for cooling the refrigerator compartment 2 again is reached, the cooling by the second cold air duct 11b is prioritized. For example, cooling by increasing the air volume ratio to the second cold air duct 11b by halving the opening degree of the baffle 20a of the first cold air duct 11a and fully opening the opening degree of the baffle 20b of the second cold air duct 11b. Then, cooling is performed by the second cold air duct 11b alone in which the baffle 20a is fully closed and the baffle 20b is fully opened.

  Next, FIG. 11 is a diagram showing a temperature chart of control different from those in FIGS. Referring to FIG. 11, the temperature detected by third temperature sensor 42 reaches (TR1) Min, the temperature detected by second temperature sensor 43 reaches (TR2) Min, and first cold air duct 11a. A cooling method when the temperature detected by the first temperature sensor 44 rises and exceeds a predetermined temperature (TR3) H after stopping the blowing of the cold air by the second cold air duct 11b will be described.

  For example, after a temperature detected by the second temperature sensor 43 becomes (TR2) Min (time t3), when many foods are put in the vicinity of where the first temperature sensor 44 is installed, The temperature detected by the third temperature sensor 42 and the second temperature sensor 43 also increases, and in particular, the temperature detected by the first temperature sensor 44 may exceed a predetermined temperature (TR3) H. At this time, the region where the first temperature sensor 44 is provided is a region where the cold air blown from the discharge ports of the first cold air duct 11a and the second cold air duct 11b circulates in common. It can be cooled with a cold air duct.

  That is, as shown in FIG. 11, the temperature detected by the third temperature sensor 42 and the second temperature sensor 43 at time t6 when the temperature detected by the first temperature sensor 44 exceeds (TR3) H. Are (TR1) Min, (TR2) Min or more and satisfy the following condition (TR1) Max, (TR2) Max, the baffle 20a and the baffle 20b are opened and the first cold air duct 20a and the second Cold air is blown by the cold air duct 20b. Until the temperature detected by the first temperature sensor 44 reaches (TR3) L (time t8), cool air is blown by the first cold air duct 20a and the second cold air duct 20b, but the temperature (TR3) L If the temperature detected by the third temperature sensor 42 first reaches (TR1) Min before reaching the temperature, the baffle 20a is closed at this time and the cool air is blown to the first cool air duct 11a. Until the temperature detected by the first temperature sensor 44 reaches (TR3) L, the blowing of cool air by the second cool air duct 11b alone is continued.

  As shown in FIG. 8b, the cooling by the second cold air duct 11b is circulated along the ceiling surface 63 of the refrigerating chamber 2, and the region and the refrigerating mainly divided by the uppermost shelves 34a and 34b and the upper wall 63 are refrigerated. After cooling the region 2A, which is the region of the upper door pocket 33a of the chamber doors 2a, 2b, the region 2B partitioned by the door pockets 33b, 33c, the bottom shelf 34f and the upper heat insulating partition wall 28 is cooled. Therefore, it is possible to perform cooling in consideration of excessive cooling of the food disposed in the region 2C where the usage frequency is high.

  Therefore, the temperatures detected by the third temperature sensor 42 and the second temperature sensor 43 both satisfy the conditions equal to or higher than the temperature (TR1) Min and (TR2) Min, and are detected by the first temperature sensor 44. In order to prevent the food disposed in the region C that is frequently used from being overcooled when cooling is resumed in the first cold air duct 11a and the second cold air duct 11b so that the temperature reaches (TR3) L. The cooling by the first cold air duct 11a is stopped when the temperature (TR1) Min is reached, and the second cold air duct 11b disposed in the region C has a relatively small influence on the food, and the second temperature sensor 43 Even if the detected temperature is equal to or lower than (TR2) Min, the first temperature sensor 44 can be cooled until it reaches the temperature (TR3) L.

  Next, FIG. 12 is a temperature chart during the cooling operation of the refrigerating room according to the first embodiment of the present invention, and is a diagram showing control different from FIGS. 9 to 11. Referring to FIG. 12, the temperature detected by third temperature sensor 42 reaches (TR1) Min, the temperature detected by second temperature sensor 43 reaches (TR2) Min, and first cold air duct 11a. After the cooling air blown by the second cold air duct 11b is stopped, the temperature detected by the first temperature sensor 44 rises, and another cooling method when the temperature exceeds a predetermined temperature (TR3) H will be described. To do.

  For example, after a temperature detected by the second temperature sensor 43 becomes (TR2) Min (time t3), when many foods are put in the vicinity of where the first temperature sensor 44 is installed, The temperature detected by one temperature sensor 44 may exceed a predetermined temperature (TR3) H. Until the temperatures detected by the third temperature sensor 42 and the second temperature sensor 43 satisfy the conditions of (TR1) Min to (TR1) Max and (TR2) Min to (TR2) Max, respectively. Even if the temperature detected by the temperature sensor 44 exceeds (TR3) H (time t6), the food is not cooled to prevent overcooling and freezing. The temperatures detected by the third temperature sensor 42 and the second temperature sensor 43 are times t9 that satisfy the conditions of (TR1) Min to (TR1) Max and below (TR2) Min to (TR2) Max and below, respectively. At that time, the baffle 20a and the baffle 20b are opened, and the blowing of the cold air is started by the first cold air duct 11a and the second cold air duct 11b. In FIG. 12, the condition that the temperature output from the first temperature sensor is (TR1) Min or higher and the temperature output from the second temperature sensor is (TR2) Min or higher satisfies both the conditions at time t9. The cooling may be started sequentially by the first cold air duct 11a and the second cold air duct 11b from the one that satisfies this condition first. The control until the first temperature sensor 44 reaches the temperature (TR3) Min is the same as in FIG.

  As described above, the region where the first temperature sensor 44 is installed is the region 2B where the cold air blown from the discharge ports of the first cold air duct 11a and the second cold air duct 11b circulates in common. Therefore, according to the temperature detected by the third temperature sensor 42 and the second temperature sensor 43, the temperature detected by the first temperature sensor 44 by the two cold air ducts is (TR3) Max or less. The food can be cooled while preventing the food from being overcooled.

(Embodiment 2)
Next, an embodiment in which the first temperature sensor 44 is installed at another location will be described with reference to FIGS. 13a to 15. In addition, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 13a is a diagram schematically showing the flow of cold air when cooling is performed by both the first cold air duct 11a and the second cold air duct 13b. As shown in FIGS. 8a, 8b, and 8c, it goes without saying that food is not placed on the shelves 34c and 34d in the middle stage, but even if food is placed, the outlets 30a, When the flow of cool air discharged from 30b and 30c is smooth, the food placed on the shelves 34c and 34d is efficiently cooled. However, as shown in FIG. 13a, when many foods are placed on the shelves 34c and 34d, the flow of cold air discharged from the discharge ports 30a and 30b becomes worse, and the foods cannot be cooled efficiently. In such a case, it is better to perform the cooling by the second cold air duct 11b than the cooling by the first cold air duct 11a as shown in FIG. 13b.

  Next, an installation place of the first temperature sensor 44 for implementing such a cooling method will be described.

  FIG. 14 is a diagram for explaining a first temperature sensor installed in the refrigerator compartment according to the second embodiment of the present invention. In the present embodiment, the first temperature sensor 44 is provided in the vicinity of the discharge ports 30a, 30b of the first cold air duct 11a that mainly cools the middle shelves 34c, 34d, 34e that are frequently used. As shown in FIG. 13a, when the food is packed too much, the cold air from the discharge port is blocked by the food, so the temperature around the first temperature sensor 44 is blown from the cooler 14. It is easily affected directly by low temperature and cold air, and the temperature drops rapidly. Since the discharge port 30c provided for cooling below the shelf 34f is located in the lower part of the refrigerator compartment 2 that tends to be low in temperature, the opening area of the discharge port is small, and the discharge ports 30a and 30b are first used. Since the food placed on the shelves 34c, 34d, and 34e having a high frequency is cooled and then the periphery thereof is cooled, the opening area of the discharge port is increased. Therefore, since the flow of cool air discharged from the discharge ports 30a and 30b having a large opening area greatly affects the cooling of food, it is preferable to provide the first temperature sensor 44 in the vicinity of the discharge ports 30a and 30b.

  The first temperature sensor 44 is preferably provided in each of the discharge port 30a and the discharge port 30b. However, the cold air discharged from the discharge port 30a and the discharge port 30b rebounds after the collision with the food. Since the flow is distributed in the direction, if the first temperature sensor 44 is provided at least between the discharge port 30a and the discharge port 30b, it becomes easy to be affected by the cold air from either the discharge port 30a or the discharge port 30b.

FIG. 15 is a temperature chart during the cooling operation of the refrigerator compartment according to the second embodiment of the present invention.
When the temperatures detected by the third temperature sensor 42 and the second temperature sensor 43 reach (TR1) Max and (TR2) Max, respectively, the baffles 20a and 20b are opened and the first cold air duct 11a and second The refrigerator compartment 2 is cooled by the cold air duct 11b. In FIG. 15, as an example, at the time t1, cooling by the first cold air duct 11a and the second cold air duct 11b is started simultaneously.

  As shown in FIG. 14, when the first temperature sensor 44 is provided in the vicinity of the discharge port provided in the middle of the first cold air duct 11a, the first temperature sensor 44 is often provided on the shelf near the installation location of the first temperature sensor 44. When the food is placed (time t2), it is easily affected by the low temperature cold air from the discharge ports 30a, 30b of the first cold air duct 11a (see FIG. 13a), and therefore detected by the first temperature sensor 44. The temperature that falls is drastically reduced. When such a phenomenon is detected by the first temperature sensor 44, it is determined that a large amount of food is placed on the shelf and the flow of cold air has deteriorated. In order to improve the flow of cold air in the refrigerator compartment 2 and efficiently cool the food, the temperature detected by the first temperature sensor 44 is lower than the temperature detected by the third temperature sensor 42 (TR3 ) When 1 or less (time t5) or thereafter, switching from cooling by the first cold air duct 11a to cooling from the upper part of the refrigerator compartment 2 by the second cold air duct 11b. Thereafter, the second cold air duct 11b cools from the upper part of the refrigerator compartment 2, and when the temperature detected by the third temperature sensor 42 becomes (TR1) Min (time t3), the refrigerator compartment 2 is cooled. finish.

  If the temperature detected by the third temperature sensor 42 becomes (TR1) Min before the temperature detected by the second temperature sensor 43 reaches (TR2) Min, Cooling of the refrigerator compartment 2 is terminated in order to prevent freezing of water and food in the ice making water tank 36 and the decompression storage chamber 35 provided. At this time, since the upper space of the refrigerating room 2 is not sufficiently cooled, when the cooling room 2 is cooled again after the cooling of the freezing room 7, the second cold air duct 11b is used. Prioritize cooling. For example, cooling by increasing the air volume ratio to the second cold air duct 11b by halving the opening degree of the baffle 20a of the first cold air duct 11a and fully opening the opening degree of the baffle 20b of the second cold air duct 11b. Then, cooling is performed by the second cold air duct 11b alone in which the baffle 20a is fully closed and the baffle 20b is fully opened.

(Embodiment 3)
Next, Embodiment 3 will be described with reference to FIGS. In addition, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 16 is a diagram illustrating a third temperature sensor 42 installed in the refrigerator compartment according to the third embodiment of the present invention. The amount of cold air passing through the first cold air duct 11a and the second cold air duct 11b is blown from the discharge ports 30a, 30b, 30c of the first cold air duct 11a and the discharge ports 31, 32 of the second cold air duct 11b. In the region where the cool air circulates together, that is, in the region defined by the third temperature sensor 42 provided in the refrigerator return port 39, the uppermost shelves 34a, 34b of the refrigerator compartment 2, and the upper wall 63 of the refrigerator compartment 2. The second temperature sensor 43 (see FIGS. 2 and 3) provided is controlled based on the temperature detected by them. The refrigerating room return port 39 is a region in which cold air blown from the discharge ports 30a, 30b, 30c of the first cold air duct 11a and the discharge ports 31, 32 of the second cold air duct 11b circulates together (FIG. 2, FIG. 2). 3 is provided on the inlet side of the return cold air duct where the cold air discharged into the refrigerator compartment 2 is returned to the cooler 14 again.

  Next, the cooling method of the refrigerator compartment 2 when the 3rd temperature sensor 42 is provided in the refrigerator compartment return port 39 is demonstrated. FIG. 17 is a temperature chart during the cooling operation of the refrigerator compartment according to the third embodiment of the present invention.

  When the temperature detected by the third temperature sensor 42 is (TR1) Max (time t1), the baffle 20a of the first cold air duct 11a is opened, and when the temperature is (TR1) Min (time t5), the first The baffle 20a of the cold air duct 11a is closed. When the temperature detected by the second temperature sensor 43 is (TR2) Max (time t1), the baffle 20b of the second cold air duct 11b is opened, and when the temperature is (TR2) Min (time t3), Control based on closing the baffle 20b of the second cold air duct 11b is basically performed.

  For example, when the uppermost shelves 34a, 34b and the like are in a high load state (hot food is stored in the uppermost shelves 34a, 34b, the door pocket 33a, etc., many foods are brought in, the door 2a, 2b), since it takes time until the second temperature sensor 43 reaches the temperature (TR2) Min, the temperature detected by the third temperature sensor 42 is (TR1) Min. (Time t5), even after the baffle 20a of the first cold air duct 11a is closed, cooling is continued in the second cold air duct 11b, and the temperature of the lower part of the refrigerator compartment 2 continues to decrease. In such a case, since the temperature around the ice making water tank 36 and the decompression storage room 35 (region 2B; see FIG. 3) provided in the lower part of the refrigerator compartment 2 may be frozen, there is a risk of freezing. A lower limit temperature (TR1) Min ′ (time t4) at which water or food in the decompression storage chamber 35 does not freeze is determined in advance, and before the second temperature sensor 43 reaches (TR2) Min, the third temperature When the temperature sensor 42 reaches the temperature (TR1) Min ′ (time t4), the baffle 20b of the second cold air duct 11b is closed, and the cooling of the refrigerator compartment 2 is ended.

  Even in such a case, since the upper space of the refrigerating room 2 is not sufficiently cooled, the second cold air duct is used when the refrigerating room 2 is cooled again after the cooling of the freezing room 7 is completed. Prioritize cooling by 11b. For example, cooling by increasing the air volume ratio to the second cold air duct 11b by halving the opening degree of the baffle 20a of the first cold air duct 11a and fully opening the opening degree of the baffle 20b of the second cold air duct 11b. Then, cooling is performed by the second cold air duct 11b alone in which the baffle 20a is fully closed and the baffle 20b is fully opened.

  The present invention can achieve the following effects according to the embodiments described above.

  That is, a storage room in a refrigerated temperature zone, a plurality of shelves provided in the storage room, a first cold air duct that supplies cold air to at least one of the spaces formed by the plurality of shelves, and a second cold air A duct, a blowing means for blowing cold air to each of the first cold air duct and the second cold air duct, a first air volume adjusting device for controlling the air blowing of the first cold air duct, and the second A refrigerator having a second air volume adjusting device for controlling air flow of the cold air duct, the first cold air duct, the first region to which the cold air from the second cold air duct is supplied, and the storage chamber A second region in which cold air is supplied by the second cold air duct between the shelf provided in the uppermost stage and the upper wall of the storage chamber, and the shelf provided in the uppermost stage in the storage chamber Between the shelf provided at the bottom, the first cold air duct In has a third region where the cool air is supplied, and providing a first temperature sensing means to the first region.

  As a result, among the plurality of spaces formed by the shelves in the storage room, the temperature of the common cooling region by the first cold air duct and the second cold air duct is appropriately detected by the temperature detection means, thereby overcooling or high temperature. Therefore, it is possible to provide a refrigerator with high energy saving performance by improving the storage stability and reliability of food.

  Further, the second region includes a second temperature detecting unit, and the first air volume adjusting device and the first temperature detecting unit are based on temperatures detected by the first temperature detecting unit and the second temperature detecting unit. Control the second air volume adjustment device. As a result, the temperatures of a plurality of regions (a single cooling region with a relatively low use frequency at the upper part of the storage room by the second cold air duct and a common cooling region by the first cold air duct and the second cold air duct) are relatively set. In comparison, cooling control can be performed, and cooling operation with improved energy saving can be performed.

  Further, the third region includes a third temperature detection unit, and the first temperature detection unit, the second temperature detection unit, and the third temperature detection unit based on the temperature detected by the third region. The first air volume adjusting device and the second air volume adjusting device are controlled. As a result, a plurality of regions (single cooling region having a relatively high frequency of use in the middle of the storage chamber by the first cold air duct and a single cooling region having a relatively low frequency of use in the upper part of the storage chamber by the second cold air duct) And the temperature of the common cooling area | region by a 1st cold air duct and a 2nd cold air duct) can be detected, and the cooling control which comparatively judged each space temperature is attained.

  The first temperature detecting means is provided between the shelf provided at the lowest stage in the storage chamber and a heat insulating partition wall that partitions the storage chamber in the freezing temperature zone adjacent to the lower portion of the storage chamber. This is a common cooling area for the first cold air duct and the second cold air duct due to the influence of the low temperature from the storage room in the adjacent refrigeration temperature zone and the influence of the high temperature when it becomes a high load state. The temperature in the storage chamber can be appropriately managed based on the temperature in the region where the temperature easily changes.

  Further, when the temperature detected by the first temperature detecting means reaches a preset temperature or less, the blowing to at least one of the first cold air duct and the second cold air duct is stopped. Thereby, the freezing by overcooling the area | region (area | region affected by the low temperature from the storage room of the adjacent freezing temperature zone) of the lower part of a storage room can be prevented, and a reliable cooling operation can be performed.

In addition, a storage room in a refrigerated temperature zone, a plurality of shelves provided in the storage room, a first cold air duct that supplies cold air to at least one of the spaces formed by the plurality of shelves, and a second cold air A duct, a blowing means for blowing cold air to each of the first cold air duct and the second cold air duct, a first air volume adjusting device for controlling the air blowing of the first cold air duct, and the second A refrigerator having a second air volume adjusting device for controlling air flow of the cold air duct, the first cold air duct, the first region to which the cold air from the second cold air duct is supplied, and the storage chamber A second region in which cold air is supplied by the second cold air duct between the shelf provided in the uppermost stage and the upper wall of the storage chamber, and the shelf provided in the uppermost stage in the storage chamber Between the shelf provided at the lowest level, the first cold air duct A third region to which air is supplied, and a first temperature detecting means is provided between the plurality of discharge ports provided in the first cold air duct, and a third temperature is provided in the third region. A detection means is provided.
The

  Accordingly, the food storage status can be estimated from the temperature change in a region where the usage frequency is relatively high in consideration of the storage status of the food, and the efficient cooling operation in the storage room can be performed according to the actual usage status. .

Further, when the temperature detected by the first temperature detecting means becomes lower than the temperature detected by the third temperature detecting means, the air blowing of the first cold air duct is stopped, and the first The second cool air duct is blown.
As a result, it is possible to prevent insufficient cooling by judging that the food is stored in a large amount and the discharged cold air does not circulate and cannot be properly cooled, and cooling is performed from the upper part of the storage chamber. .

  In addition, a storage room in a refrigerated temperature zone, a plurality of shelves provided in the storage room, a first cold air duct that supplies cold air to at least one of the spaces formed by the plurality of shelves, and a second cold air A duct, a blowing means for blowing cold air to each of the first cold air duct and the second cold air duct, a first air volume adjusting device for controlling the air blowing of the first cold air duct, and the second A refrigerator having a second air volume adjusting device for controlling air flow of the cold air duct, the first cold air duct, the first region to which the cold air from the second cold air duct is supplied, and the storage chamber A second region in which cold air is supplied by the second cold air duct between the shelf provided in the uppermost stage and the upper wall of the storage chamber, and the shelf provided in the uppermost stage in the storage chamber Between the shelf provided at the lowest level, the first cold air duct It has a third region in which the gas is supplied, and providing a third temperature detecting means to the refrigerating chamber cold air return port.

  Thereby, it can prevent that it becomes high temperature by the overcooling of the lower part of a storage room, or the insufficient cooling of the part through which cold air finally passes.

1 Refrigerator 2 Refrigerated room (storage room in refrigerated temperature zone)
2a, 2b refrigerator compartment door 2A area (second area)
2B area (first area)
2C area (third area)
7 Freezer room 8 Cooler storage room 9 Fan inside fan (air blowing means)
DESCRIPTION OF SYMBOLS 10 Heat insulation box 11 Cold room cold air duct 11a First cold air duct 11b First cold air duct 12 Upper freezer cold air duct 13 Lower freezer cold air duct 14 Cooler 17 Freezer return 18 Vegetable room return duct 18a Vegetable room return Mouth 18b Vegetable room return discharge port 20 Refrigeration room twin damper 20a Baffle (first air flow adjustment device)
20b baffle (second air volume adjustment device)
21 Evaporating dish 22 Defrost heater 23 樋 24 Compressor 25 Vacuum heat insulating material 27 Drain hole 28 Upper heat insulating partition wall 29 Lower heat insulating partition walls 30a, 30b, 30c Discharge port 31, 32 Discharge port 33a, 33b, 33c Door pocket 34, 34a, 34b, 34c, 34d, 34e, 34f Shelf 35 Depressurized storage chamber 36 Ice making water tank 38 Discharge port 39 Refrigerating chamber return port 42 Third temperature sensor (third temperature detecting means)
43 Second temperature sensor (second temperature detection means)
44 1st temperature sensor (1st temperature detection means)
47 Back member 60 Freezer damper 61 Machine room 62 Sealing material 63 Upper wall 64 Food

Claims (3)

A refrigerated storage room,
A plurality of shelves provided in the storage chamber;
A first cold air duct and a second cold air duct for supplying cold air to at least one of the spaces formed by the plurality of shelves;
A blowing means for blowing cold air to each of the first cold air duct and the second cold air duct;
A first air volume adjusting device for controlling air flow of the first cold air duct;
In a refrigerator provided with a second air volume adjusting device that controls the ventilation of the second cold air duct,
A first region to which cold air from the first cold air duct and the second cold air duct is supplied;
Between the shelf provided in the uppermost stage in the storage chamber and the upper wall of the storage chamber, a second region in which cold air is supplied by the second cold air duct,
Between the shelf provided at the uppermost stage in the storage chamber and the shelf provided at the lowermost stage, a third region where cold air is supplied by the first cold air duct,
Providing a first temperature detection means in the first region ;
The refrigerator characterized in that when the temperature detected by the first temperature detecting means reaches a preset temperature or less, the blowing of both the first cold air duct and the second cold air duct is stopped. .   The second region is provided with second temperature detecting means, and the first air volume adjusting device and the second temperature detecting device are based on the temperatures detected by the first temperature detecting means and the second temperature detecting means. The refrigerator according to claim 1, wherein the air volume adjusting device is controlled.   The first temperature detecting means is provided between the shelf provided at the lowest stage in the storage chamber and a heat insulating partition wall that partitions the storage chamber in the freezing temperature zone adjacent to the lower portion of the storage chamber. The refrigerator according to claim 1, wherein the refrigerator is characterized.