JP5103452B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator.

  A vapor compression refrigerator that cools a refrigerator compartment and a freezer compartment with a single cooler and that includes a damper to independently control the air flow to the refrigerator compartment and the freezer compartment is disclosed in Patent Document 1, for example. There is a description.

  The refrigerator described in Patent Document 1 includes a refrigeration room at the top, a switching room that can be switched between an ice making room and a freezing temperature at the bottom, a vegetable room at the bottom, a freezing room at the bottom, and a refrigerator at the back of the vegetable room. An internal fan and a refrigerator provided with a cooler below it, each of the refrigerator compartment, ice making room, switching room, and freezer compartment is provided with a parallel air passage from the cooler storage compartment, and the air passage to each room is cooled A damper for controlling air flow to each chamber is provided in front of the outlet. In addition, the vegetable room has an air passage in series with the freezer room, and the ventilation to the vegetable room is controlled by a refrigerator compartment damper. With the above configuration, the refrigerator described in Patent Document 1 includes a refrigeration room (a refrigeration room and a vegetable room connected by an air passage in series with the refrigeration room) and a freezing room (an ice making room, a switching room that can be switched to a freezing temperature, a freezing room) ) It is possible to control the air flow to each independently, but each room damper is provided in front of the air outlet to each room (in Patent Document 1, “provided adjacent to the cooler”) It is said that space efficiency is improved.

JP 2002-31466 A

  However, the refrigerator described in Patent Document 1 includes a damper that controls the air flow to each chamber in front of the cold air outlet of the air passage from the cooler storage chamber to each chamber in parallel. The food storage room (vegetable room) located in front of the fan is a food storage room (in series with the refrigeration room) that does not directly control air blowing, and does not include a damper. As a result, a damper can be provided inside the air passage to each room with good space efficiency, and the food storage room located in front of the internal fan is also arranged as a parallel air passage from the cooler storage room. No consideration is given to the specific problems that occur when a damper is provided. For this reason, the food storage room located in front of the internal fan also has a space efficiency deterioration, cost increase, energy saving deterioration, reliability when the damper is disposed as a parallel air passage from the cooler storage room. Various problems such as decline in sex occurred.

  Then, in view of the said subject, this invention relates to the refrigerator provided with the damper which controls ventilation to a food storage room, and it aims at obtaining the refrigerator with improved internal volume efficiency and energy saving property.

In order to achieve the above object, a storage room partitioned in a refrigerator body, a cooler in which air for cooling the storage room is heat-exchanged, a cooler room in which the cooler is provided, and heat generated by the cooler A blower that blows the exchanged air to the storage chamber; and a cold air duct that is provided in a blowing area of the blower and has an opening that guides the air blown by the blower to the storage chamber, and the cold air duct Is provided between a blower support member that supports the blower and a cover member provided in front of the blower, the cover member being provided integrally with a wall surface of the cooler chamber, and a lower portion of the blower support member A communication hole that communicates with the cooler chamber and a heater that is provided in the cold air collecting duct, and the heater extends from the communication hole into the cooler chamber. Do

  Advantageous Effects of Invention According to the present invention, it is possible to obtain a refrigerator with improved internal volume efficiency and energy saving performance, which relates to a refrigerator including a damper that controls air blowing to a food storage chamber.

The front external view of the refrigerator which concerns on embodiment of this invention. XX sectional drawing of FIG. 1 showing the structure in the refrigerator compartment which concerns on embodiment of this invention. The front view showing the structure in the refrigerator compartment which concerns on embodiment of this invention. The principal part expansion explanatory drawing of FIG. The principal part expansion explanatory drawing of FIG. The flowchart showing control of the refrigerator which concerns on embodiment of this invention. The time chart showing control of the refrigerator which concerns on embodiment of this invention. The front view showing the fan internal peripheral structure of the refrigerator which concerns on embodiment of this invention. The longitudinal cross-sectional view showing the fan internal peripheral structure of the refrigerator which concerns on embodiment of this invention. The perspective view showing the freezer compartment damper of the refrigerator which concerns on embodiment of this invention. The figure explaining the damper installation location to the room in front of the fan in the refrigerator of the conventional refrigerator. The figure explaining the damper installation location other than the room in front of the fan in the refrigerator of the conventional refrigerator. The exploded perspective view which looked at the fan periphery peripheral structure from the back side.

  An embodiment of a refrigerator according to the present invention will be described with reference to FIGS. 1 to 13.

  FIG. 1 is a front external view of a refrigerator 1 according to the present embodiment, FIG. 2 is a vertical sectional view taken along line XX in FIG. 1 showing a configuration inside the refrigerator 1, and FIG. FIG. 4 is a front view showing the internal configuration, showing the arrangement of the cold air duct and the outlet, and FIG. 4 is an enlarged explanatory view of the main part of FIG. FIG. 5 is an enlarged explanatory view of the main part of FIG.

  As shown in FIG. 1, the refrigerator 1 of this embodiment is equipped with the refrigerator compartment 2, the ice-making room 3, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 from upper direction as a food storage room. In the following description, the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5 may be collectively referred to as a freezing room 60, and the refrigerating room 2 and vegetable room 6 may be collectively referred to as a refrigerating room 61.

  The refrigerating room 2 includes front and rear refrigerating room doors 2a and 2b which are divided into left and right sides. The ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 are each a drawer-type ice making room door. 3a, an upper freezer compartment door 4a, a lower freezer compartment door 5a, and a vegetable compartment door 6a. Hereinafter, the refrigerator compartment doors 2a and 2b, the ice making compartment door 3a, the upper freezer compartment door 4a, the lower freezer compartment door 5a, and the vegetable compartment door 6a are simply referred to as doors 2a, 2b, 3a, 4a, 5a, and 6a.

  The refrigerator 1 includes a door sensor (not shown) that detects the open / closed state of each door of the doors 2a, 2b, 3a, 4a, 5a, and 6a, and a state determined to be the door open state for a predetermined time, for example, 1 minute. When the operation is continued, an alarm (not shown) for notifying the user, a temperature setting unit (not shown) for setting the temperature of the refrigerator compartment 2 and the vegetable compartment 6, and the temperature setting of the freezer compartment 60 are provided.

  As shown in FIG. 2, 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 (foamed polyurethane). The heat insulating box 10 of the refrigerator 1 is mounted with a vacuum heat insulating material 25.

  The inside of the refrigerator is separated from the refrigerator compartment 2 by the heat insulating partition wall 28, the upper freezing chamber 4 and the ice making chamber 3 (see FIG. 1, the ice making chamber 3 is not shown in FIG. 2). The lower freezer compartment 5 and the vegetable compartment 6 are separated.

  A plurality of door pockets 32 are provided on the inner side of the doors 2a and 2b (see FIG. 1). The refrigerator compartment 2 is partitioned into a plurality of storage spaces in the vertical direction by a plurality of shelves 36.

  As shown in FIG. 2, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 are withdrawn integrally with doors 4a, 5a, 6a provided in front of the respective compartments, and storage containers 4b, 5b, 6b. Are respectively provided, and the storage containers 4b, 5b, 6b can be pulled out by putting a hand on a handle portion (not shown) of the doors 4a, 5a, 6a and pulling it out to the front side. Similarly, the ice making chamber 3 shown in FIG. 1 is provided with an unillustrated storage container (indicated by (3b) in FIG. 2) integrally with the door 3a. The container 3b can be pulled out by pulling it out. The upper freezer compartment 4 can be used as a quick freezer compartment. In order to improve the quick freezing performance, the storage container 4b of the upper freezer compartment 4 is provided with an aluminum tray (not shown) so that the freezing speed is improved.

  As shown in FIG. 2 (refer to FIGS. 3 to 5 as appropriate), the cooler 7 is provided in a cooler storage chamber 8 provided substantially at the back of the lower freezing chamber 5 and provided above the cooler 7. The air cooled (cooled air, hereinafter, low-temperature air cooled by the cooler 7) is cooled by exchanging heat with the cooler 7 by the internal fan 9 and the refrigerator compartment air duct 11 and the upper freezer compartment It is sent to each of the refrigerator compartment 2, the upper freezer compartment 4, the lower freezer compartment 5, and the ice making chamber 3 through the air duct 12. Air blowing to each room is controlled by opening and closing the refrigerator compartment damper 20 and the freezer compartment damper 50.

  Incidentally, the refrigerating room air duct 11 and the upper freezer compartment air duct 12 are provided on the back side of each room of the refrigerator 1 as indicated by broken lines in FIG.

  Specifically, when the refrigerator compartment damper 20 is in the open state and the freezer compartment damper 50 is in the closed state, the cold air is sent to the refrigerator compartment 2 from the outlets 2c provided in multiple stages via the refrigerator compartment air duct 11. After the cooling of the refrigerating room 2 is finished, the cold air flows in from the refrigerating room return port 2d provided at the lower right side of the back side of the refrigerating room 2 and passes through the refrigerating room-vegetable room communication duct 16 to the right side of the back side of the vegetable room 6. The vegetable compartment 6 is cooled by flowing into the vegetable compartment 6 from the vegetable compartment outlet 6c provided at the top. The cold air that has cooled the vegetable compartment 6 is returned from the vegetable compartment return port 6d provided in front of the lower part of the heat insulating partition wall 29 through the vegetable compartment return duct 18, and returned to the vegetable compartment having a width substantially equal to the width of the cooler 7. It flows in from the outlet 18a (see FIG. 3 or FIG. 5).

  Although the freezer damper 50 is omitted in FIG. 3, when the freezer damper 50 is open, the cold air heat-exchanged by the cooler 7 is boosted by the internal fan 9 and passes through the upper freezer compartment air duct 12. Air is blown from the outlets 3c, 4c and 5c to the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5, respectively. In addition, as shown in FIG. 3, in the refrigerator 1 of this embodiment, the seven outlets 3c-5c of the freezer compartment 60 are provided in total, and the total perimeter of the outlets 3c-5c is 1200 mm.

  As shown in FIG. 4, in the refrigerator 1 of the present embodiment, an internal fan 9 is provided above the cooler 7, and a freezer compartment damper 50 is provided above the internal fan 9. Furthermore, an upper freezer compartment outlet 4c and an ice making compartment outlet 3c (see FIG. 3) for sending cold air to the upper freezer compartment 4 located in the upper stage of the freezer compartment 60 are provided above the freezer compartment damper 50. The upper freezer compartment outlet 4c has the largest opening area among the outlets of the freezer compartment.

  As shown in FIG. 5, the cold air that has cooled the refrigerator compartment 2 flows into the vegetable compartment 6 through the refrigerator compartment-vegetable compartment communication duct 16 provided on the side of the cooler storage compartment 8. The return cold air from the vegetable compartment 6 flows in from the vegetable compartment return port 6d (see FIG. 2), and cools through the vegetable compartment return duct 18 provided in the heat insulating partition wall 29 as shown in FIG. It flows into the cooler storage chamber 8 from the vegetable room return outlet 18a (see FIG. 5) provided in front of the lower portion of the cooler storage chamber 8 and having a width approximately equal to the width of the cooler 7. On the other hand, the cold air that has cooled the freezer compartment 60 has a width dimension substantially equal to the width of the cooler 7 provided at the lower part of the partition plate 54 that partitions the cooler storage chamber 8 and the freezer compartment 60, as shown in FIG. It flows into the cooler storage chamber 8 through the freezer return port 17. A defrost heater 22 is provided below the cooler storage chamber 8. The defrost heater 22 is a glass tube heater, and an aluminum radiating fin 22a is provided on the outer periphery of the glass tube.

  An upper cover 53 is provided above the defrost heater 22 in order to prevent defrost water from dripping onto the defrost heater 22. In addition, as shown in FIG. 5, a warm air storage space 26 is provided in front of the lower portion of the cooler storage chamber 8. The warm air storage space 26 is a space into which the ascending air current during the defrosting of the cooler 7 flows. The warm air storage space 26 can prevent warm air (updraft) generated during the defrosting operation performed by energizing the defrost heater 22 from flowing into the freezer compartment 60.

  The frost adhering to the wall of the cooler 7 and the surrounding cooler storage chamber 8 is dissolved at the time of the defrosting operation, and the defrost water generated at that time is stored in the bowl 23 provided at the lower part of the cooler storage chamber 8. After flowing in, it reaches an evaporating dish 21 disposed in a machine room 19 to be described later via a drain pipe 27, and generates heat by the compressor 24 and a condenser (not shown) disposed in the machine room 19 and the compressor 24. Evaporate.

  A cooler temperature sensor 35 attached to the cooler 7 is located at the upper left as viewed from the front of the cooler 7, a refrigerating room temperature sensor 33 is provided in the refrigerating room 2, and a freezing room temperature sensor 34 is provided in the lower freezing room 5. The temperature of the cooler 7 (hereinafter referred to as “cooler temperature”), the temperature of the refrigerator compartment 2 (hereinafter referred to as refrigerator compartment temperature), and the temperature of the lower freezer compartment 5 (hereinafter referred to as “freezer compartment temperature”). Can be detected). Furthermore, the refrigerator 1 includes an outside temperature sensor (not shown) that detects the temperature outside the refrigerator. The vegetable compartment 6 is also provided with a vegetable compartment temperature sensor 33a.

  Incidentally, in this embodiment, isobutane is used as a refrigerant, and the amount of refrigerant enclosed is as small as about 80 g.

  A control board 31 on which a CPU, a memory such as a ROM and a RAM, an interface circuit, and the like are mounted is disposed on the upper surface side of the refrigerator 1 (see FIG. 2). The control board 31 includes the above-described outside temperature sensor and cooling. Temperature sensor 35, refrigerator temperature sensor 33, vegetable room temperature sensor 33a, freezer room temperature sensor 34, door sensor described above for detecting the open / closed state of each door of doors 2a, 2b, 3a, 4a, 5a, 6a, Connected to a temperature setter (not shown) provided on the inner wall of the refrigerator compartment 2, and controls the ON / OFF of the compressor 24, the refrigerator compartment damper 20 and the freezer compartment damper 50 individually by a program previously installed in the ROM. Control of each actuator (not shown) that is driven to ON, ON / OFF control and rotation speed control of the internal fan 9, alarm O to notify the door open state described above / Controls the OFF and the like.

  Next, a detailed structure around the internal fan 9 and the freezer damper 50 of the refrigerator 1 of the present embodiment will be described with reference to FIGS. 8 to 10 and FIG. 13.

  8 is a front view of the structure around the internal fan 9 and the freezer damper 50 of the refrigerator 1 according to the present embodiment. FIG. 9 is an internal fan 9 and the freezer damper 50 of the refrigerator 1 according to the present embodiment. It is the longitudinal cross-sectional view which looked at the surrounding structure from the side. FIG. 10 is a perspective view of the freezer compartment damper 50 of the refrigerator 1 of the present embodiment, and FIG. 13 is an exploded perspective view of the peripheral structure of the internal fan 9 as viewed from the back side.

  As shown in FIG. 10, a freezer damper 50 used in the refrigerator 1 according to the present embodiment includes a horizontally elongated frame 103 made of, for example, resin, having an opening 102 on one side, and one end (rectangular shape) of the frame 103. The driving means 100 includes a driving system such as a motor and a reduction gear. One surface of the opening / closing plate 104 includes a buffer member 104a formed of a flexible material such as urethane foam or polyethylene foam. The freezer compartment damper 50 is closed when the buffer member 104a is pressed against the inner surface (the surface facing the opening / closing plate) 103a in the vicinity of the opening 102 of the frame 103. Therefore, the sealing performance depends on the peripheral length 102 a of the opening 102. Here, the opening 102 is provided with a connecting portion 103b where the upper side and the lower side of the frame 103 are connected, but this is provided for suppressing deformation and does not directly contribute to the sealing performance. Therefore, when considering the sealing performance of the freezer damper 50, the peripheral length 102a of the opening 102 does not include the length of the connecting portion 103b that does not directly contribute to the sealing performance. In addition, the magnitude | size of the opening 102 of the freezer damper 50 used with the refrigerator 1 of this embodiment is 180 mm x 35 mm, and the perimeter 102a which contributes to sealing performance is 430 mm. Further, a rib 103c is provided on the outer periphery of the opening 102. The rib 103c serves as both a positioning when the freezer compartment damper 50 is attached and a reinforcement of the opening 102.

  As shown in FIG. 8, the internal fan 9 of the refrigerator 1 of the present embodiment is a motor-integrated fan in which the casing 9a has a substantially square shape and a motor is provided in the boss portion. A fan cover 70 is provided on the discharge side of the internal fan 9 to form a cold air collecting duct 13 for collecting cold air. The fan cover 70 is provided so as to cover the front of the internal fan 9. The outer peripheral portion 13a of the cold air collecting duct 13 is upstream from the position where the distance from the rotation center of the internal fan 9 to the outer peripheral portion 13a is minimum (minimum dimension position shown in FIG. 8) in the internal fan rotation direction. It becomes the expansion wind path 13b so that it may expand gradually toward the downstream. Further, in the refrigerator 1 of the present embodiment, the enlarged air passage 13b of the cold air collecting duct 13 is 180 degrees in the direction of rotation of the internal fan from the position where the distance from the internal fan rotation center to the air passage outer peripheral wall is minimized. Have more.

  That is, the enlarged air passage 13b has an angle larger than 180 degrees or 180 degrees from the start end (upstream) to the end end (downstream). The outlet opening 13c is horizontally long, and the longitudinal direction of the outlet opening 13c is located at the end (downstream) of the enlarged air passage 13b. The fan cover 70 has a recess at a position facing the internal fan 9, and an enlarged air passage 13 b is provided around the recess. That is, the cold air flows through the enlarged air passage 13 b and is rectified, so that it smoothly passes through the outlet opening 13 b and flows into the upper freezer compartment 4 and the lower freezer compartment 5. Thereby, the cooling efficiency of the upper freezer compartment 4 and the lower freezer compartment 5 can be improved.

  Moreover, as shown in FIG. 4, the upper stage freezer compartment air duct 12 is provided so that the front of the fan cover 70 may be covered. That is, the cool air collecting duct 13 and the upper freezer compartment air duct 12 are disposed between the cooler storage chamber 8 and the upper freezer compartment 4 and the lower freezer compartment 5. As a result, an air insulation layer is formed behind the storage space, so that the upper freezing chamber 4 and the lower freezing chamber 5 are affected by heat from the cooler storage chamber 8 (for example, the temperature rise during the defrosting operation of the cooler 7). Etc.) is suppressed, and the temperature change of the storage space can be suppressed.

  Further, as shown in FIG. 8, the internal fan 9 is disposed so as to be inclined from the horizontal plane by an angle β1 (β1 is 10 degrees in the refrigerator 1 of the present embodiment).

  As shown in FIG. 9, the freezer compartment damper 50 is arranged so that the opening 102 faces substantially forward, but the arrangement position is such that the rib 103 c of the freezer compartment damper 50 is connected to the cold air collecting duct shown in FIG. 8. It is easily determined by matching with the 13 outlet openings 13c (the outlet opening 13c is larger than the opening 102 of the freezer damper 50). Moreover, as shown in FIG. 9, the freezer damper 50 is arrange | positioned so that the rotating shaft 101 may become an upper side. Furthermore, the open / close plate 104 of the freezer damper 50 opens to the back side, and the opening angle θ varies depending on the operating state, and is used in a state of 0 degrees (fully closed), 60 degrees, and 90 degrees (fully opened) ( Details of the relationship between the operating state and the opening angle will be described later).

  As shown in FIG. 8, the freezer damper 50 is installed to be inclined from the horizontal plane by an angle β2 (β2 is 6 degrees in the refrigerator 1 of the present embodiment). Further, as shown in FIG. 9, the internal fan 9 is inclined backward by an angle α1 (α1 is 13 degrees in the refrigerator 1 of the present embodiment), and the freezer damper 50 is angle α2 (α2 in the refrigerator 1 of the present embodiment). Is inclined backward by 6 degrees).

  The size of the outlet opening 13c of the cold air collecting duct 13 is 188.5 mm × 43 mm, and its peripheral length 13d is 463 mm.

  The fan hold 71 is provided with a communication hole 75 through which the cold air collecting duct 13 and the cooler storage chamber 8 communicate. The communication hole 75 is provided at the lower end in the cold air collecting duct 13.

  Further, a fan cover heater 76 is disposed in a region below the internal fan 9 in the cold air collecting duct 13 (fan cover inner surface 70a).

  As shown in FIG. 9, the fan cover heater 76 has a portion 76 a that extends from the cold air collecting duct 13 through the communication hole 75 and into the cooler housing chamber 8.

  As shown in FIG. 13, the fan cover 70 is an integrally molded product with the partition plate 54. Further, the member (fan hold 71) for holding the internal fan 9 is separate from the fan cover 70, and is assembled to the back side of the fan cover as shown in FIG.

  As shown in FIGS. 8 and 9, the fan cover heater 76 is provided on the fan cover inner surface 70a. In addition, the fan hold 71 is fixed to the fan cover 70 with screws or the like through the extending portion 76a of the fan cover heater 76 through the communication hole 75 of the fan hold 71 to which the internal fan 9 is attached. Finally, the extending portion 76a of the fan cover heater 76 is bent downward and attached to the partition plate 54. As described above, the fan cover heater 76 is provided.

Next, control of the cooling operation of the refrigerator 1 of the present embodiment will be described with reference to FIG.
FIG. 6 is a control flowchart showing basic control of the refrigerator 1 of the present embodiment. The control is performed by the CPU of the control board 31 (see FIG. 2) executing a program stored in the ROM.

  The cooling operation of the refrigerator 1 of the present embodiment includes a freezer operation, a refrigerating room operation, a refrigerating operation, a frost cooling operation, and OFF. The freezer operation is the state of “fan in the refrigerator ON, refrigerator colder damper closed, freezer damper open (open angle θ = 90 degrees (see FIG. 9 for definition of open angle)), compressor ON (high rotation)” Thus, the freezer compartment 60 is cooled, and the refrigerator compartment operation is “an internal fan ON, refrigerator compartment damper open, freezer compartment damper closed (open angle θ = 0 degree), compressor ON (low rotation)”. In this state, the operation for cooling the refrigerator compartment 61 and the refrigerator-freezer operation are “an internal fan ON, refrigerator compartment damper open, freezer compartment damper open (open angle θ = 60 degrees), compressor ON (high rotation In this state, both the refrigerator compartment 61 and the freezer compartment 60 are cooled. In addition, the frost cooling operation is an operation in which the refrigerator 61 is cooled in the state of “internal fan ON, refrigerator freezer damper open, freezer compartment damper closed, compressor OFF”. The machine is also stopped and is not cooled.

  As shown in FIG. 6, when the refrigerator 1 is started to operate when the power is turned on (start), each chamber in the refrigerator 1 is cooled, and the basic heat load is only the heat intrusion from the outside. From then on, if the user opens and closes the door and the heat load increases, or the outside temperature and humidity environment changes and the amount of heat penetration does not change, a certain operation pattern is repeated (stable Cooling operation). In FIG. 6, the control process up to this stable cooling operation state is omitted.

  In addition, at the time of the stable cooling operation of the refrigerator 1 of this embodiment, since control based on the temperature of the vegetable compartment 6 is not performed, description regarding the vegetable compartment 6 is abbreviate | omitted (in the description of the following control, vegetables are contained in the refrigerator compartment 2). Including chamber 6).

  During the stable cooling operation, a constant operation pattern (operation cycle) is repeated. Here, the operation will be described from the state in which the freezer operation is performed (step S101). The freezer operation is an operation of cooling the freezer 60 in a state of “internal fan ON, refrigerator colder damper closed, freezer damper open, compressor ON (high rotation)”.

  When opening / closing of the refrigerating room door 2a or 2b is detected by the refrigerating room door sensor that detects opening / closing of the refrigerating room door 2a or 2b in the state where the freezer operation is being performed (step S102), step The process proceeds to S201 (step S201 will be described later). If the refrigerator compartment door 2a or 2b is not opened and closed, the refrigerator compartment upper limit temperature TR_2 in which the refrigerator compartment temperature detected by the refrigerator compartment temperature sensor 33 is preset (TR_2 = in the refrigerator 1 of the present embodiment) is set. It is determined whether the temperature is higher than 6 ° C. (step S103).

  When the temperature of the refrigerating room is not higher than the refrigerating room temperature TR_2 (No) (the control when the refrigerating room temperature is higher than the refrigerating room upper temperature TR_2 (Yes) will be described later), the temperature is detected by the freezing room temperature sensor 34. It is determined whether or not the freezer compartment temperature is lower than a preset freezer compartment lower limit temperature TF_1 (TF_1 = −21 ° C. in the refrigerator 1 of the present embodiment) (step S104). In addition, when it is not freezer compartment temperature <freezer compartment lower limit temperature TF_1 (No), it returns to step S101 again.

  In step S104, if the freezer compartment temperature is smaller than the freezer compartment lower limit temperature TF_1 (Yes), then the refrigerator compartment temperature and the preset reference temperature TR_a (TR_a = 5 in the refrigerator 1 of the present embodiment) are set. ° C), TR_b (TR_b = 4 ° C in the refrigerator 1 of the present embodiment), and the value of the reference temperature Tevp related to the detected temperature of the cooler temperature sensor 35 is selected based on the comparison result. Specifically, if the refrigerating room temperature> TR_a, Tevp = Tevp_1 (Tevp_1 = 3 ° C. in the refrigerator 1 of the present embodiment), and if TR_a ≧ refrigerating room temperature> TR_b, Tevp = Tevp_2 (the present embodiment In the refrigerator 1, Tevp_2 = −10 ° C.), and if TR_b ≧ refrigeration room temperature, Tevp = Tevp_3 (Tevp_2 = −18 ° C. in the refrigerator 1 of the present embodiment) is set (step S105).

  Therefore, Tevp_1 is selected when the outside air temperature is high and the refrigerator temperature is likely to rise, and Tevp_3 is selected when the outside temperature is low and the refrigerator temperature is difficult to rise. If the outside air temperature is about, Tevp_2 is selected. In addition, for example, a food gap may be sandwiched between the refrigerator compartment door 2a or 2b, and a slight gap is generated, which steadily increases the heat load. However, the refrigerator compartment sensor has a small gap so that the door is closed. It may be in a state where an alarm that recognizes the state and notifies the door open state does not sound. In this case, even if the outside air temperature is relatively low, the temperature of the refrigerator compartment may easily rise, and Tevp_2 or Tevp_1 may be selected as the value of Tevp.

  Subsequently, a frost cooling operation is performed (step S106). The frost cooling operation is an operation in which the refrigerator compartment 61 is cooled in a state of “internal fan ON, refrigerator compartment damper open, freezer compartment damper closed, compressor OFF”. In the state in which the frost cooling operation is performed, whether or not the refrigerator compartment temperature is lower than a preset refrigerator compartment lower limit temperature TR_1 (TR_1 = 1.5 ° C. in the refrigerator 1 of the present embodiment) (step S107). It is determined whether or not the cooler temperature is higher than the reference temperature Tevp set in step S105 (step S108), the refrigerator temperature does not satisfy the refrigerator compartment temperature <refrigerator compartment lower limit temperature TR_1 (No), and the refrigerator temperature> reference. When the temperature Tevp is not satisfied (No), it is determined whether or not the freezer temperature is higher than the preset compressor ON temperature TF_2 (TF_2 = −19 ° C. in the refrigerator 1 of the present embodiment) ( In step S109), when the freezer temperature> compressor ON temperature TF_2 is not satisfied (No), the process returns to step S107 again.

In step S109, when it is determined that the freezer temperature> compressor ON temperature TF_2 (Yes), the compressor is subsequently turned on and the low rotation (in the refrigerator 1 of the present embodiment, the compression at this time). The refrigerator is operated at a machine speed of 1200 min ⁻¹ ) (step S110). That is, the refrigerating room operation is an operation of cooling the refrigerating room 61 in the state of “internal fan ON, refrigerating room damper open, freezer compartment damper closed, compressor ON (low rotation)”.

  In a state in which the refrigerator compartment operation is performed, it is determined whether or not the freezer compartment temperature is higher than a preset freezer compartment upper limit temperature TF_3 (TF_3 = −16 ° C. in the refrigerator 1 of the present embodiment) (step S111). ), If it is determined that the freezer temperature> freezer upper limit temperature TF_3 is not satisfied (No) (the control when the freezer temperature> freezer upper limit temperature TF_3 is satisfied (Yes) will be described later), the refrigerator compartment The process proceeds to determination of temperature <refrigeration room lower limit temperature TR_1 (step S112). When the refrigerator compartment temperature <the refrigerator compartment lower limit temperature TR_1 is not satisfied (No), the process returns to step S111 again.

In step S112, when the temperature of the refrigerator compartment is smaller than the refrigerator compartment lower limit temperature TR_1 (Yes), “freezer compartment damper is opened and refrigerator compartment damper is closed” (step S113). In the refrigerator 1 of the embodiment, the compressor rotation speed at this time is 1900 min ⁻¹ ), and the internal fan 9 is stopped (step S114). After a predetermined time (30 seconds in the refrigerator 1 of the present embodiment) has elapsed (step S115), the internal fan 9 is operated and the freezer operation is started (step S116). Since the freezer compartment operation in step S116 is the state of the freezer compartment operation described in step S101, the above is the operation cycle during the stable cooling operation of the refrigerator 1 of the present embodiment.

  In general, in a refrigerator, when a door is opened or closed or food having a relatively high temperature is stored, the heat load temporarily increases. Below, control when the heat load of the refrigerator 1 of this embodiment increases temporarily is demonstrated.

  In the refrigerator 1 of the present embodiment, whether or not the refrigerator compartment door 2a or 2b is opened or closed is determined in step S102, and if the refrigerator compartment door 2a or 2b is opened or closed, the process proceeds to step S201. It is like that. In step S201, the refrigerator compartment upper limit temperature TR_2 is replaced with TR_2 '(TR_2 = 6 ° C. becomes TR_2 ′ = 8 ° C. in the refrigerator 1 of the present embodiment). When the refrigerating room upper limit temperature TR_2 is overwritten with TR_2 ', the process returns to step S101. Returning to step S101, if the door has already been closed (if step S102 is determined to be No), then in step S103, the determination of refrigeration room temperature> refrigeration room upper limit temperature TR_2 is performed. Here, in step S201, since the refrigerator compartment upper limit temperature TR_2 is overwritten with TR_2 ', the refrigerator compartment upper limit temperature is high. Therefore, it is difficult to satisfy the refrigerator temperature> the refrigerator temperature upper limit temperature TR_2 in step S103 as compared with the case where the refrigerator compartment 2 is not opened and closed. When the temperature of the refrigerating room> the refrigerating room upper limit temperature TR_2 in Step S103 is satisfied (Yes), it is considered that the refrigerating room 2 is in an indispensable state, the refrigerating room damper 20 is opened, and the refrigerating operation, that is, “ As the operation of the internal fan ON, refrigerator compartment damper open, freezer compartment damper open, compressor ON (high rotation) ", both the refrigerator compartment 61 and the freezer compartment 60 are cooled (step S301). After the refrigeration operation is started in step S301, the process proceeds to step S112. Note that the refrigerator compartment upper limit temperature TR_2 returns from TR_2 '(= 8 ° C.) to the original value TR_2 (= 6 ° C.) again after a predetermined time (30 minutes in the refrigerator 1 of the present embodiment). .

  Further, in step S112, the determination of the freezer temperature> the freezer upper limit temperature TF_3 is performed during the refrigerator operation. When the freezer temperature> freezer upper limit temperature TF_3 is satisfied (Yes), the cooling of the freezer compartment 60 is considered to be indispensable, the compressor 24 is set to a high rotation speed, the freezer compartment damper 50 is opened, and the freezing operation is performed. That is, both the refrigerator compartment 61 and the freezer compartment 60 are cooled as the operation of “internal fan ON, refrigerator compartment damper open, freezer compartment damper open, compressor ON (high rotation)” (step S301). After the refrigeration operation is started in step S501, the process proceeds to step S112.

  Further, if either step S107 (refrigeration room temperature <refrigeration room lower limit temperature TR_1) or step S108 (cooler temperature> Tevp (reference temperature set in step S105)) is satisfied (Yes), frost The internal fan is stopped during the cooling operation (step S401), and the process proceeds to step S109.

  FIG. 7 shows the temperature change in the refrigerator when the refrigerator 1 of the present embodiment is installed in an environment where the outside air temperature is 30 ° C. and the relative humidity is 70%, and the stable cooling operation is performed. 3 is a time chart showing control states of the refrigerator compartment damper 20, the freezer compartment damper 50, and the compressor 24. The detailed measurement conditions are in accordance with JIS C9801: 2006.

  As shown in FIG. 7, the freezer operation performed in the state of “internal fan ON, refrigerator colder damper closed, freezer damper open, compressor ON (high rotation)” is performed at the freezer temperature at the elapsed time ta. Has reached the freezer compartment lower limit temperature TF_1 (step S104 in FIG. 6), and subsequently, a frost cooling operation performed in the state of “internal fan ON, refrigerator compartment damper closed, freezer compartment damper open, compressor OFF” (Step S106 in FIG. 6). In step S105 in FIG. 6, the temperature in the refrigerator compartment is greater than TR_a (TR_a = 5 ° C.), so Tevp is Tevp = Tevp_1 (Tevp_1 = 3 ° C.). During the frost cooling operation, since the freezer compartment 60 is not cooled, the freezer compartment temperature rises and reaches the compressor ON temperature TF_2 at the elapsed time tb (step S109 in FIG. 6). Thus, the compressor 24 is operated at a low rotation speed, and the refrigerator compartment operation of “internal fan ON, refrigerator compartment damper open, freezer compartment damper closed, compressor ON (low revolution)” is performed (step S110 in FIG. 6). Until the elapsed time tb, the frost cooling was performed while the compressor 24 was not operated. From the elapsed time tb, the refrigerator 24 was operated so that the cooling of the refrigerator 61 was accelerated. At the elapsed time tc, the temperature reaches the refrigerator compartment lower limit temperature TR_1 (step S112 in FIG. 6). Therefore, the operation proceeds to the freezer operation (“internal fan ON, refrigerating chamber damper closed, freezer damper open, compressor ON (high rotation)”), but at the start of the freezer operation, a predetermined time Δt (Δt = For 30 seconds, the internal fan 9 is stopped (steps S113 to S115 in FIG. 6), and after the predetermined time Δt has elapsed, the internal fan 9 is operated and cooling is started (step S116 in FIG. 6).

  As mentioned above, although the structure and basic control system of the refrigerator of this embodiment were demonstrated, the effect which the refrigerator of this embodiment show | plays below is demonstrated.

  The refrigerator of this embodiment goes to the room provided in front of the internal fan 9 between the internal fan 9 and the room (freezer compartment 60) provided with a plurality of outlets provided in front of the internal fan 9. A cold air collecting duct 13 is provided to collect the total air volume, and a single damper is provided at the outlet of the cold air collecting duct 13.

  Thereby, it becomes possible to control the ventilation of the chamber provided in front of the internal fan at low cost and with good space efficiency. The reason will be described below with reference to FIGS. 11 and 12.

  FIG. 11 is a schematic diagram showing the positional relationship between the internal fan 9 and the chamber 80 provided with a plurality of outlets provided in front of the internal fan 9. FIG. 11 is a schematic diagram showing the positional relationship between the internal fan 9 and the chamber 81 provided with a plurality of outlets provided below the internal fan 9. When considering the installation of a damper to block the blowing of air to the chamber 81 provided with a plurality of outlets provided below the internal fan 9 shown in FIG. 12, as shown in FIG. 9 has a portion that becomes a wind passage (single air passage) 81c through which all of the cool air sent to the chamber 81 provided with a plurality of blowout ports passes. By installing the damper 91 in the one air passage 81c, the space for installing the damper can be minimized, and the damper can be installed efficiently. On the other hand, when considering the installation of a damper in order to block the blowing of air to the chamber 80 provided with a plurality of outlets provided in front of the internal fan 9 shown in FIG. Since there is no portion that becomes a single air passage in the air passages leading to the plurality of outlets 80a and 80b of the provided room 80, as shown in FIG. In addition, it is necessary to install dampers 90a and 90b in front of each outlet, or to install a large damper 90 that closes the entire internal fan discharge space. Therefore, the space efficiency is poor and the cost is increased.

  On the other hand, in the refrigerator of this embodiment, the cold air collecting duct 13 that collects cold air is provided in the air path leading to the room (freezer room 60) provided with a plurality of outlets provided in front of the internal fan 9. A single damper (freezer compartment damper 50) is provided at the outlet of the cold air collecting duct 13. By forming the cold air collecting duct 13 in this way, it is possible to control the air blowing to the room provided with a plurality of outlets provided in front of the internal fan 9 by installing a single damper. Thereby, space efficiency is good and it becomes possible to control the ventilation to the room provided with a plurality of outlets provided in front of the internal fan while suppressing an increase in cost.

  In the refrigerator of the present embodiment, the room provided in front of the internal fan 9 is the freezing room 60, and the air blowing to the freezing room 60 can be controlled to open and close by a single damper. Thereby, the deterioration of energy saving property and the fall of reliability can be suppressed. The reason will be explained below.

  As described above, the refrigerator of the present embodiment performs the refrigerator operation and the frost cooling operation. In this operation mode, only the refrigerator compartment 61 is blown, so that cool air having a relatively high temperature circulates. Therefore, in these operation modes, if cold air having a relatively high temperature leaks into the freezer compartment 60, the freezer compartment 60 is heated, and a problem that the frozen food can be dissolved may occur. Moreover, heating the freezer compartment 60 increases the heat load when cooling the freezer compartment 60. In order to cool the freezer compartment 60, it is necessary to set it as low cooler temperature, for example, -25 degreeC below the freezer compartment temperature. In general, the operation of the freezer compartment in which the cooler temperature is low has low efficiency (low coefficient of performance), and if the load during the operation of the freezer compartment is increased, the energy saving performance is lowered. As described above, when cold air leaks into the freezer compartment 60 during the refrigerator compartment operation or the frost cooling operation, there arises a problem of reliability that the frozen food can be dissolved and a problem that energy saving is lowered.

  Here, the damper blocks the cool air by, for example, a structure as shown in FIG. 10, but generally the sealing degree is not perfect, and the cool air leaks slightly from the sealing surface. Accordingly, the longer the length of the sealing surface, that is, the longer the circumferential length of the opening of the damper, the greater the amount of cold air leakage. Therefore, increasing the number of dampers or using an extremely large damper causes an increase in the amount of cold air leakage, which causes a problem of reliability that the frozen food can be dissolved, and tends to deteriorate energy saving.

If the room provided in front of the internal fan is a refrigerated room, the cooling operation with the refrigerated room damper closed is a freezer operation. If there is a large amount, there is a possibility that the food freezes. However, if the leakage amount is generally assumed (leakage amount of about 0.01 m ³ / min or less), basically, The temperature of the refrigerator compartment is slightly lowered, and the influence is relatively small. Therefore, in particular, when the room provided in front of the internal fan is a freezing room, consideration must be given to cold air leakage.

  As described above, in the refrigerator according to the present embodiment, the freezer compartment 60 is provided in front of the internal fan 9, and the air blowing to the freezer compartment 60 can be controlled to be opened and closed by a single damper, thereby saving energy. And deterioration of reliability can be suppressed.

  The refrigerator according to the present embodiment includes an internal fan 9 above the cooler 7 and a freezer damper 50 above the internal fan 9. Thereby, it becomes a refrigerator excellent in energy saving property. The reason will be explained below.

  In general, when the flow flowing in the flow path is turned, the ventilation resistance increases, and the degree of the resistance increases as the flow rate increases. The refrigerator according to the present embodiment performs the freezer operation. During the operation of the freezer, all the cold air that has been pressurized by the internal fan 9 after passing through the cooler 7 is not divided by the cold air collecting duct 13. It flows toward the damper 50. Accordingly, since a large amount of flow goes to the freezer compartment damper 50, when the cool air that has been pressurized through the cooler 7 and turned up by the internal fan 9 is turned toward the freezer compartment damper 50, the ventilation resistance increases. In the refrigerator according to the present embodiment, as described above, the internal fan 9 is provided above the cooler 7 and the freezer damper 50 is provided above the internal fan 9, so after passing through the cooler 7, The airflow resistance is not increased by suppressing the turning of the cold air boosted by the internal fan 9 toward the freezer damper 50. Thereby, since the fan power for obtaining a predetermined air volume can be suppressed, it becomes a refrigerator with high energy saving property.

  The refrigerator of the present embodiment includes an internal fan 9 above the cooler 7, a freezer compartment damper 50 above the internal fan 9, and an upper freezer compartment outlet 4 c above the freezer compartment damper 50. Thereby, it is a refrigerator with high energy-saving property. The reason will be explained below.

  Generally, cold air having a low temperature with respect to the ambient temperature forms a downward flow from the upper side to the lower side, so that the room can be well cooled by supplying more cold air to the upper side of the room. Therefore, the upper stage freezer compartment outlet 4c requires a large amount of discharged air. Therefore, in the refrigerator of this embodiment, the upper stage freezer compartment outlet 4c is the largest opening area among the outlets of the freezer compartment 60. However, in order to obtain a large amount of discharged air, not only the size of the opening area but also the ventilation resistance in the route to the outlet is a problem. In the refrigerator of the present embodiment, as described above, the internal fan 9 is disposed above the cooler 7, the freezer compartment damper 50 is disposed above the internal fan 9, and the upper freezer compartment outlet 4 c is disposed above the freezer compartment damper 50. Since it is provided, the cold air smoothly flows toward the upper freezer compartment outlet 4c which requires a large amount of discharge airflow. Thereby, since the fan power at the time of sending required air volume can be suppressed, energy saving property improves.

  In the refrigerator of the present embodiment, the room provided in front of the internal fan 9 is the freezer room 60, the internal fan 9 is above the cooler 7, and the freezer damper 50 is above the internal fan 9. And a refrigerator compartment 61 (refrigerator compartment 2) above the freezer compartment 60. Thereby, it becomes a refrigerator excellent in energy saving property. The reason will be explained below.

  A refrigerator including a refrigerator compartment and a freezer compartment needs to send a predetermined air volume while suppressing ventilation resistance not only to the refrigerator compartment but also to the refrigerator compartment. The refrigerator of this embodiment includes the cooler 7 from the bottom, the internal fan 9 above the cooler 7, and the freezer compartment damper 50 above the internal fan 9, so that the flow from the bottom to the top is smooth. I have to. Therefore, by allowing the cool air to flow from the bottom to the top of the air passage (refrigerating chamber air duct 11) leading to the refrigerating chamber 2, the air can be smoothly sent to the refrigerating chamber 2, thereby suppressing the ventilation resistance. It becomes possible. Thereby, since the fan power at the time of sending required air volume to a refrigerator compartment can be suppressed, energy saving property improves.

  In the refrigerator of the present embodiment, the room provided in front of the internal fan 9 is the freezer room 60, the internal fan 9 is above the cooler 7, and the freezer damper 50 is above the internal fan 9. The refrigerator compartment 2 is provided above the freezer compartment 60, and the vegetable compartment 6 is provided below the freezer compartment 60. Thereby, it is easy to keep the refrigerator compartment 2 and the vegetable compartment 6 at an appropriate temperature. The reason will be explained below.

  In general, the refrigerated room and the vegetable room are both kept at the refrigerated temperature. However, the vegetable room sometimes stores foods that are sensitive to low temperatures (foods that cause low temperature damage). It is desirable to keep it at a slightly higher temperature (for example, 3 ° C. in a refrigerator room, 5 ° C. in a vegetable room, etc.). For this reason, it is necessary for the vegetable compartment to have a cooling capacity lower than that of the refrigerator compartment. That is, it is effective to send cold air having a higher temperature than the cold air sent to the refrigerator room to the vegetable room, or to send a smaller amount of cold air than the refrigerator room at the same temperature. In the refrigerator of the present embodiment, the refrigerator compartment 2 is provided above the freezer compartment 60 and the vegetable compartment 6 is provided below the refrigerator compartment 60. Thus, like the refrigerator of this embodiment, the refrigerator compartment 2 and the vegetables are provided. When the chambers 6 are arranged in series, the chilled room 2 can be sent to the vegetable room 6 because the chilled room 2 is cooled, so the air volume is the same, but the temperature is higher than the chilled air sent to the refrigerated room 2. Can be sent to the vegetable compartment 6 and it becomes easy to keep the above-mentioned appropriate temperature.

  Moreover, as another embodiment, the case where a refrigerator compartment and a vegetable compartment are arranged in parallel is also considered. In this case, as described above, the cold air from the internal fan 9 that is easy to go to the upper refrigeration room is forced to turn downward to the vegetable room, so there is no particular consideration. In both cases, the draft resistance of the air passage toward the vegetable room increases. Therefore, in this case, cold air having the same temperature reaches the refrigerator compartment and the vegetable compartment, but the air volume to the vegetable compartment can be easily kept low.

  For the above reasons, it is easy to keep the refrigerator compartment and the vegetable compartment at an appropriate temperature by arranging the refrigerator compartment above the freezer compartment and the vegetable compartment below the freezer compartment.

  The refrigerator according to the present embodiment includes a freezer compartment damper 50 that opens to the front side of the internal fan 9 above the cooler 7 and substantially upwards above the internal fan 9. A freezer compartment damper 101 is disposed at a position (upper side) far from the internal fan 9. Generally, in the area near the internal fan, the closer to the internal fan, the faster the flow and the lower the flow, the more effective it is to keep away from the fan to avoid freezing. is there. In the refrigerator according to the present embodiment, the rotating shaft 101 is positioned far from the internal fan 9 with respect to the freezer damper 50, so that it is difficult for a malfunction such as the rotating shaft 101 to freeze and become unrotatable. .

  In the refrigerator of this embodiment, the opening / closing plate 104 of the freezer damper 50 is opened to the back side. Thereby, since it is not necessary to take the depth dimension of the freezer compartment air duct 12 more than necessary, space efficiency improves.

  In the refrigerator of the present embodiment, the open angle θ of the freezer damper 50 is set to 60 degrees during the refrigeration operation. This is because, for example, when the open angle θ of the freezer damper 50 is increased (for example, 90 degrees) during the refrigerating operation, the flow resistance of the refrigerating room air duct 11 becomes too large, and thus the air volume to the refrigerating room 2 is increased. If the open angle θ of the freezer damper 50 is made smaller (for example, 45 degrees), the flow resistance of the refrigerator compartment air duct 11 becomes too small, so that the refrigerator compartment 2 becomes colder. Chamber 2 cools down. In the refrigerator according to the present embodiment, by setting the opening angle θ of the freezer damper 50 during the refrigerating operation to 60 degrees, the air volume to the refrigerating room 2 is adjusted, and the refrigerating room 2 is appropriately cooled.

  In the refrigerator of the embodiment, the outer peripheral portion 13a of the cold air collecting duct 13 is stored in a refrigerator from a position where the distance from the rotation center of the internal fan 9 to the outer peripheral portion 13a is minimum (minimum dimension position shown in FIG. 8). An enlarged air passage 13b that is sequentially enlarged in the rotation direction of the inner fan 9 is provided. Thereby, the pressure of the swirling component in the discharge flow of the internal fan 9 can be effectively recovered, the internal fan 9 can be used efficiently, and energy saving is improved.

  In the refrigerator of the present embodiment, the cold air collecting duct 13 has an enlarged air passage of 180 degrees or more in the rotation direction of the internal fan 9 from the position where the distance from the rotation center of the internal fan 9 to the outer peripheral portion 13a is minimized. 13b is provided. Thereby, since the distance which can be utilized for pressure recovery of the swirling component in the discharge flow from the internal fan 9 can be secured sufficiently, the internal fan 9 can be used efficiently, and energy saving is improved.

  In the refrigerator of the present embodiment, as shown in FIG. 8, the freezer damper 50 is disposed at an angle β2 with respect to the horizontal plane. Even when water is dripped into the freezer compartment damper 50 during the defrosting operation or the like, this causes water to flow down from the freezer compartment damper 50, so that the water stays in the freezer compartment damper 50 and then freezes. Such a faulty accident can be prevented and the refrigerator becomes highly reliable.

  In the refrigerator of the present embodiment, as shown in FIG. 9, the freezer compartment damper 50 is disposed so as to be inclined to the back side by an angle α2 from the vertical plane. Accordingly, since the air blown from the internal fan 9 provided below the freezer compartment damper 50 can be smoothly sent out to the upper freezer compartment outlet 4c for discharging a large amount of airflow, the fan power for sending the necessary airflow is reduced. Since it can be suppressed, energy saving is improved.

  In the refrigerator of the present embodiment, as shown in FIG. 9, the internal fan 9 is disposed so as to be inclined to the back side by an angle α1 from the vertical plane. As a result, the flow through the cooler 7 can be smoothly directed to the freezer compartment damper 50, so that the fan power when sending the necessary air volume can be suppressed, and the energy saving performance is improved.

  The refrigerator of the present embodiment is provided with a communication hole 75 through which the inside of the cold air collecting duct 13 communicates with the inside of the cooler storage chamber 8. As a result, it is possible to prevent the occurrence of defective accidents such as ice (frost) growing due to water staying in the cold air collecting duct 13 and locking the internal fan, and the reliability is high. Become a refrigerator.

  In order to prevent water from staying in the cold air collecting duct 13, the communication hole 75 is provided so as to communicate with the cooler storage chamber 8 even if it is provided so as to communicate with the freezer compartment 60. However, the refrigerator of the present embodiment is provided with the communication hole 75 so as to communicate with the cooler storage chamber 8. Thereby, deterioration of energy saving property is suppressed and reliability is improved. The reason will be explained below.

  As described above, the refrigerator according to the present embodiment is a refrigerator including the freezer damper 50 and performs a refrigerator compartment operation and a frost cooling operation. In this operation mode, only the refrigerator compartment 61 is blown, so that cool air having a relatively high temperature circulates. Therefore, for example, when the communication hole 75 is provided so as to communicate with the freezer compartment 60, cold air having a relatively high temperature flows into the freezer compartment 60 through the communication hole 75 during this operation mode, The room 60 will be heated, and the problem that the frozen food can be dissolved may occur. Further, warming the freezer compartment 60 increases the heat load for cooling the freezer compartment 60. In order to cool the freezer compartment 60, it is necessary to make the cooler temperature lower than the freezer temperature. Generally, the operation of the freezer compartment with the cooler temperature being low is low in efficiency (coefficient of performance COP is low) and freezing. If the load at the time of room operation is increased, the energy saving performance is lowered. Therefore, in the refrigerator of this embodiment, the communication hole 75 is provided so as to communicate with the cooler storage chamber 8, thereby suppressing deterioration in energy saving and improving reliability.

  In the refrigerator of the present embodiment, as shown in FIG. 8 or FIG. 9, the communication hole 75 through which the inside of the cold air collecting duct 13 communicates with the inside of the cooler storage chamber 8 is located at the lower end of the space inside the cold air collecting duct 13. It is provided as follows. Thereby, deterioration of energy saving property can be suppressed. The reason will be explained below.

  If water flows down in the cold air collecting duct 13 during defrosting or the like, if the communication hole 75 is not provided at the lower end of the space in the cold air collecting duct 13, a part of the water flowing down is It will stay in the cold air collecting duct. This residual water freezes during the cooling operation and melts during the defrosting operation. Therefore, during the cooling operation, extra energy for freezing is required (specifically, the compressor power increases), and during defrosting, energy for melting is required (specifically, the defrosting heater power is required). To increase). Therefore, in the refrigerator of the present embodiment, by providing a communication port through which the inside of the fan cover internal air passage on the fan discharge side of the refrigerator and the space outside the fan cover communicate with each other is positioned at the lower end of the fan cover internal air passage. , To suppress the deterioration of energy saving.

  In the refrigerator of this embodiment, as shown in FIG. 4, a warm air storage space 26 is provided in front of the lower portion of the cooler storage chamber 8. An upper freezer compartment air duct 12 is disposed in front of the cold air collecting duct 13. Thereby, energy saving property becomes high. The reason will be explained below.

  As described above, the refrigerator of the present embodiment is a refrigerator provided with the freezer damper 50 and performs the refrigerating room operation. However, since the refrigerating room operation cools only the refrigerating room 61, the refrigerator has a relatively high temperature. Cold air circulates and the cooler temperature rises. When the cooler temperature is high, the efficiency of the refrigeration cycle (coefficient of performance COP) is high and the energy saving performance is high. However, when the front of the cooler storage chamber 8 is the freezer compartment 60 as in the refrigerator of the present embodiment, if the heat insulation between the freezer compartment 60 and the cooler storage chamber 8 is not made, the cooler temperature is the freezer Cooling from the chamber 60 prevents the temperature from rising and prevents efficient operation. Similarly, during operation of the refrigerating room, cool air having a relatively high temperature flows in the cold air collecting duct 13, so that when the cold air in the cold air collecting duct is cooled from the freezer room 60, the temperature of the circulating cold air decreases. As a result, the cooler temperature decreases.

  Therefore, in the refrigerator of the present embodiment, a warm air storage space is provided in front of the cooler storage chamber, and a cold air collecting duct 13 is provided in front of the cold air collecting duct so that the refrigerator can be operated in a refrigerator or frost cooling operation. By using them as an air insulation layer, energy saving is improved.

  In the refrigerator of the present embodiment, the fan cover 70 and the partition plate 54 (the plate that separates the freezing chamber 60 and the cooler storage chamber 8) are integrally formed, and the fan hold 71 provided with the separate internal fan 9 is provided. Is fixed at a predetermined position. Thereby, it becomes a structure which is low-cost, has high reliability, and suppresses deterioration of energy saving. The reason will be explained below.

  As shown in FIG. 9, the peripheral structure of the internal fan 9 includes a fan cover 70, a partition plate 54, and a fan hold 71. As described above, the refrigerator of the present embodiment is a refrigerator that performs a refrigerator operation and a frost cooling operation, and in these operation modes, a relatively high temperature of cold air circulates in the cold air collecting duct 13. . If the cold air leaks into the freezer compartment 60, the freezer compartment 60 is warmed, and there may be a problem that the frozen food can be dissolved. Therefore, ideally, it is desirable that the fan cover 70, the partition plate 54, and the fan hold 71 are all integrally formed in order to reduce the location where such cold air leakage occurs as much as possible.

  However, in order to reduce the cost of the components, it is desirable to mold the components by injection molding, and it is impossible to mold all of these components integrally. The fan cover 70 and the partition plate 54 are integrated into a fan hold. One of 71 is selected, or the partition plate 54 and the fan hold 71 are integrated, and the fan cover 70 is selected separately.

  At this time, if the latter is selected, when a gap is generated between the fan cover 70 and the fan hold 71, the air in the cold air collecting duct 13 leaks to the freezer compartment 60 side. On the other hand, if the former (the fan cover 70 and the partition plate 54 are integrated and the fan hold 71 is separate) as in the refrigerator of the present embodiment, even if a gap is generated between the fan cover 70 and the fan hold 71, the cold air The air in the collecting duct 13 does not leak into the freezer compartment 60 even if it leaks into the cooler storage chamber 8. Therefore, the temperature rise of the freezer compartment 60 is unlikely to cause a problem that the frozen food can be melted, and the refrigerator has reduced energy savings.

  The refrigerator of this embodiment integrates the cover member in front of the blower and the wall surface of the cooler chamber. That is, the fan cover 76 and the partition plate 54 are integrated, and the fan hold 71 that is a blower support member is provided as a separate body, and the extending portion 76 a of the fan cover heater 76 is accommodated through the communication hole 75 provided in the fan hold 71. It is made to affix on the partition plate 54 in the chamber 8. This makes the refrigerator highly reliable. The reason will be explained below.

  The extending portion 76a of the fan cover heater 76 is attached to the partition plate 54 in the cooler storage chamber 8 through the communication hole 75 provided in the fan hold 71, so that the vicinity of the communication hole 75 is the fan cover heater. It is possible to prevent the internal fan 9 from being locked by being heated well when the current is supplied to 76 and the ice generated in the vicinity of the communication hole remaining unmelted and gradually growing in the cold air collecting duct 13. Therefore, it can be set as a reliable refrigerator. However, when the fan cover 70 and the partition plate 54 are separate bodies, the extending portion 76a of the fan cover heater 76 is affixed between separate parts of the fan cover 70 and the partition plate 54. May peel off with force. If the extending portion 76a is peeled off, the fan cover heater 76 does not heat the vicinity of the communication hole 75 satisfactorily, and the reliability decreases. Therefore, in the refrigerator of the present embodiment, the fan cover 76 and the partition plate 54 are integrated, and the extending portion 76 a of the fan cover heater 76 is passed through the communication hole 75 provided in the fan hold 71, so that the partition plate 54 in the cooler storage chamber 8. By making it stick on, it is a highly reliable refrigerator.

  In the refrigerator of the present embodiment, a part of the fan cover heater 76 (extension part 76a) is extended into the cooler storage chamber 8 through the communication hole 75. For example, what is the fan cover heater 76? A high heat conductive member such as a separate aluminum foil may be brought into thermal contact with the fan cover heater 76 and attached to the partition plate 54 through the communication hole 75.

1 Refrigerator 2, 61 Refrigerated room 3 Ice making room (freezer room)
4 Upper freezer room (freezer room)
5 Lower freezer compartment (freezer compartment)
6 Vegetable room (refrigerated room)
7 Cooler 8 Cooler storage room 9 Fan inside the cabinet 10 Heat insulation box 11 Refrigeration room air duct 12 Upper freezer room air duct 13 Cold air collecting duct 15 Refrigeration room duct 16 Cold room-vegetable room communication duct 17 Freezer room return port 18 Vegetable Room return duct 18a Vegetable room return outlet 19 Machine room 20 Refrigeration room damper 26 Warm air storage space 50 Freezer room damper 54 Partition plate 60 Freezer room 70 Fan cover 71 Fan hold 75 Communication hole 76 Fan cover heater

Claims (1)

A storage room partitioned into the refrigerator body;
A cooler in which air for cooling the storage chamber is heat-exchanged;
A cooler chamber in which the cooler is provided;
A blower for blowing air exchanged in the cooler into the storage room;
A cold air collecting duct having an opening provided in a blow-out region of the blower and having an opening for guiding the air blown by the blower to the storage chamber,
The cold air collecting duct is provided between a blower support member that supports the blower and a cover member provided in front of the blower,
The cover member is provided integrally with the wall surface of the cooler chamber ,
A communication hole provided in a lower part of the blower support member and communicating with the cooler chamber; and a heater provided in the cold air collecting duct,
The refrigerator, wherein the heater is provided extending from the communication hole into the cooler chamber .

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