JP5039761B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator.

  An example of a refrigerator that is a vapor compression refrigerator that cools a refrigeration temperature zone chamber and a refrigeration temperature zone chamber with a cooler and includes a damper to control air blowing is described in Patent Document 1, for example.

  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, but each room damper is provided in front of the air channel outlet to each room (described in Patent Document 1 as “provided adjacent to the cooler”) This is said to improve the space efficiency.

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.

  The present invention has been made in view of the above problems, and relates to a refrigerator including a damper that controls air blowing to a food storage room, and an object thereof is to obtain a refrigerator with improved internal volume efficiency and energy saving. To do.

In order to solve the above-described problems, the present invention provides heat exchange between a refrigeration temperature zone chamber and a refrigeration temperature zone chamber partitioned in a refrigerator body, and cold air that cools the refrigeration temperature zone chamber and the refrigeration temperature zone chamber. The cooler, a cooler storage chamber in which the cooler is provided at the back of the freezing temperature zone chamber, and the cooling that blows cool air heat-exchanged by the cooler to the freezing temperature zone chamber and the refrigerating temperature zone chamber an upper internal fan of the vessel, have a opening that communicates with the freezing temperature zone compartment provided so as to cover the front of該庫the fan above the in-compartment fan, the freezing temperature zone compartment and the refrigerating temperature A fan cover that forms a cool air collecting duct that collects the cool air on the discharge side of the internal fan that blows into the belt chamber, a damper that is provided in the opening of the fan cover to control air flow , and in front of the internal fan in the freezing temperature zone chamber located Comprising the upper outlet of said opening for blowing out air, and a freezing chamber duct for blowing cold air to the outlet from the opening provided so as to cover the front of the fan cover, the cool air aggregate duct and the refrigeration An air heat insulating layer by a chamber duct is formed between the freezing temperature zone chamber and the cooler storage chamber .

  In addition, a space is provided in front of a lower portion of the cooler storage chamber, into which an updraft during defrosting of the cooler flows.

  In addition, a duct through which the return cold air after being blown from the cooler storage chamber to the refrigeration temperature zone chamber flows is provided on the side of the cooler and behind the refrigeration temperature zone chamber, and the duct and the refrigeration temperature zone A vacuum heat insulating material is provided between the chambers.

  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 are collectively referred to as the freezing temperature zone 60, and the refrigerating chamber 2 and vegetable room 6 are collectively referred to as the refrigerating temperature zone 61. is there.

  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 device (not shown) for setting the temperature of the refrigerator compartment 2 and the vegetable compartment 6 and the temperature setting of the freezing temperature zone 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. Air that has been cooled by exchanging heat with the cooler 7 by the inside fan 9 (cold air, hereinafter, low-temperature air that has been cooled by the cooler 7 is referred to as cold air) is a refrigerator compartment duct 11 and a freezer compartment duct 12. , Are sent to the refrigerator compartment 2, the upper freezer compartment 4, the lower freezer compartment 5, and the ice making room 3. Air blowing to each room is controlled by opening and closing the refrigerator compartment damper 20 and the freezer compartment damper 50.

  Incidentally, the refrigerator compartment duct 11 and the freezer compartment 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 2 c provided in multiple stages via the refrigerator compartment 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).

  In FIG. 3, the freezer damper 50 is omitted, but when the freezer damper 50 is in an open state, the cold air heat-exchanged by the cooler 7 is boosted by the internal fan 9 and is blown out through the freezer duct 12. Air is sent from 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, a total of seven outlets 3c to 5c of the freezing temperature zone 60 are provided, and the total circumference of the outlets 3c to 5c is 1200 mm. is there.

  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. Further, an upper freezer compartment outlet 4c and an ice making room outlet 3c (see FIG. 3) for sending cold air to the upper freezer compartment 4 located above the freezer temperature zone 60 are provided above the freezer damper 50. The upper freezer compartment outlet 4c has the largest opening area among the outlets of the freezer compartment.

  Further, when the refrigerator fan 20 is in an open state and the internal fan 9 is operated, the cool air is stored in the cooler storage chamber 8 ⇒ cold air collecting duct 13 (details will be described later) ⇒ refrigerator compartment air duct 11 ⇒ refrigerator compartment 2 ⇒ refrigerator. The room-vegetable room communication duct 16 flows in the order of the vegetable room 6⇒the vegetable room return duct 18⇒the cooler storage room 8. Of the wall surfaces forming the cold air circulation path, the wall surfaces separating the cold air circulation path from the freezer compartment 60, that is, the front surface of the cooler storage chamber 8, the bottom surface of the refrigerator compartment 2, and the front surface of the refrigerator compartment-vegetable compartment communication duct 16. The vacuum heat insulating material 25 is disposed on at least one of the upper surfaces of the vegetable room return duct 18 (the vacuum heat insulating material 25 on the front surface of the refrigerator compartment-vegetable room communication duct 16 is not shown). In other words, a duct through which the return cold air after being blown from the cooler storage chamber 8 to the refrigeration temperature zone chamber 61 flows is provided on the side of the cooler 7 and behind the refrigeration temperature zone chamber 60. A vacuum heat insulating material 25 is provided between the freezing temperature zone chamber 60. The vacuum heat insulating material 25 is formed by enclosing glass wool, resin fiber, or the like as a core material in a gas barrier film, and heat-sealing the ends after vacuuming. It has a high heat insulation performance with a rate of 10 mW / mK or less.

  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, as shown in FIG. 4, the cold air that has cooled the refrigeration temperature zone chamber 60 is approximately 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 refrigeration temperature zone chamber 60. It flows into the cooler storage chamber 8 through the freezer return port 17 having the same width. 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 suppress warm air (updraft) generated during the defrosting operation performed by energizing the defrost heater 22 from flowing into the refrigeration temperature zone chamber 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. 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 freezer compartment 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 freezer compartment 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 (inner surface of the fan cover). As shown in FIGS. 8 and 9, the fan cover heater 76 has a portion 76 a that extends from the inside of the cool 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.

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)” The operation of cooling the refrigeration temperature zone 60 is as follows. The operation of the refrigeration chamber includes “an internal fan ON, a refrigeration chamber damper open, a freezer compartment damper closed (open angle θ = 0 °), and a compressor ON (low rotation). The operation for cooling the refrigeration temperature zone 61 in the state of “)” and the refrigeration / freezing operation are “internal fan ON, refrigeration chamber damper open, freezer compartment damper open (open angle θ = 60 degrees), compressor” This is an operation for cooling both the refrigeration temperature zone chamber 61 and the freezing temperature zone chamber 60 in the “ON (high rotation)” state. The frost cooling operation is an operation for cooling the refrigeration temperature zone chamber 61 in the state of “internal fan ON, refrigeration chamber damper open, freezer compartment damper close, compressor OFF”. And the compressor are stopped and cooling is not performed.

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 in which the freezing temperature zone 60 is cooled in the 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) and 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 refrigerator 1, Tevp_2
= −10 ° C.) and TR_b ≧ refrigeration room temperature, Tevp = Tevp_3 (Tevp_2 = −18 ° C. in the refrigerator 1 of the present embodiment) (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 refrigeration temperature zone chamber 61 is cooled in a state of “internal fan ON, refrigeration chamber damper open, freezer compartment damper close, 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 for cooling the refrigerating temperature zone chamber 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 temperature zone chamber 61 and the refrigerator temperature zone chamber 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), it is considered that cooling of the freezing temperature zone 60 is indispensable, the compressor 24 is set to a high rotation speed, the freezer compartment damper 50 is opened, and refrigeration is performed. In the refrigeration operation, that is, the operation of “internal fan ON, refrigerator compartment damper open, freezer compartment damper open, compressor ON (high rotation)”, both the refrigerator temperature zone chamber 61 and the refrigerator temperature zone chamber 60 are cooled. (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 freezing temperature zone 60 is not cooled, the freezing chamber temperature rises and reaches the compressor ON temperature TF_2 at the elapsed time tb (step S109 in FIG. 6). Subsequently, the compressor 24 is operated at a low rotation speed, and the operation of the refrigerator compartment 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 refrigeration temperature zone chamber 61 was cooled due to the operation of the refrigerating room where the compressor 24 was operated. It is accelerated and reaches the refrigerator compartment lower limit temperature TR_1 at the elapsed time tc (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).

  The structure and basic control method of the refrigerator 1 according to the present embodiment have been described above, but the effects exerted by the refrigerator 1 according to the present embodiment will be described below.

  The refrigerator 1 of the present embodiment includes a cold air collecting duct 13 for collecting cold air toward the food storage room (freezing temperature zone room 60) located in front of the internal fan 9, and the cold air collecting duct 13 is an internal fan. 9 is provided with a cold air collecting duct outlet opening 13c communicating with the refrigeration temperature zone chamber 60 located in front of 9, and a damper (freezer compartment damper 50) is provided in the fan cover outlet opening 70a to control the air flow to the refrigeration temperature zone chamber 60. The refrigeration temperature zone chamber 60 is blown only through the opening of the freezer compartment damper 50.

  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 it. FIG. 12 is a schematic diagram showing the positional relationship between the internal fan 9 and the chamber 81 having a plurality of outlets provided below the internal fan 9 (for example, the configuration of the refrigerator described in Patent Document 1 is applicable). To do).

  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, there is generally a portion of the air passage that guides the cold air to the air outlets 81a and 81b, which is an air passage (single air passage) 81c through which all of the cold air sent to the chamber 81 having a plurality of air outlets passes. By installing the damper 91 in the single air passage 81c, the space for installing the damper can be minimized and the damper can be installed efficiently (for example, the space efficiency of the refrigerator described in Patent Document 1 is improved). For this reason).

  In addition, when considering the installation of a damper to block the blowing of air to the chamber 80 having a plurality of outlets provided in front of the internal fan 9 shown in FIG. Since the air path leading to the plurality of outlets 80a, 80b of the chamber 80 basically has no part that becomes a single air path, in order to block all the air blowing to the chamber 80, the air path shown in FIG. As shown, it is necessary 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 1 of this embodiment, in the air path from the internal fan 9 to the food storage room (freezing temperature zone 60) provided with a plurality of outlets provided in front of the internal fan 9. The cold air collecting duct 13 is provided with a cold air collecting duct outlet opening 13c communicating with the refrigeration temperature zone chamber 60 located in front of the internal fan 9, and the cold air collecting duct outlet opening 13c has a freezing temperature. A damper (freezer compartment damper 50) is provided to control the air blowing to the belt chamber 60, and the air blowing to the freezing temperature belt chamber 60 is performed only through the opening of the freezer compartment damper 50. By forming the cold air collecting duct 13 in this way, it is possible to reliably guide the air to the room having a plurality of outlets provided in front of the internal fan 9 to the cold air collecting duct outlet opening 13c. It is possible to control the total amount of cold air toward the refrigeration temperature zone 60 with a damper that is large enough to be installed at the central duct outlet opening 13c. Therefore, since it is not necessary to install a large damper 90 that closes the entire fan discharge space in the cabinet, the refrigerator is efficient in space and suppresses an increase in cost.

  In the refrigerator 1 of the present embodiment, the number of outlet openings 13 a of the cold air collecting duct 13 is set to be provided with the freezer damper 50 from the plurality of outlets 3 c to 5 c of the freezing temperature zone chamber 60 positioned in front of the internal fan 9. There are a few. Thereby, space efficiency is good and it becomes a low-cost refrigerator. The reason will be explained below.

  When considering the installation of a damper to block the blowing of air to the chamber 80 having a plurality of outlets provided in front of the internal fan 9 shown in FIG. Since there is basically no portion that becomes a single air passage in the air passages leading to the plurality of outlets 80a and 80b of the chamber 80, as shown in FIG. In addition, it is effective to install dampers 90a and 90b in the vicinity of the respective outlets 80a and 80b. However, if a damper is installed for each outlet, space efficiency is reduced by increasing the volume occupied by the damper component parts, and cost is increased by increasing the number of dampers. In the refrigerator 1 of the present embodiment, the number of outlet openings 13a of the cold air collecting duct 13 is one to provide the freezer damper 50, and a plurality of outlets 3c of the freezing temperature zone chamber 60 positioned in front of the internal fan 9 are provided. By making the number smaller than the number (~ 7) of ~ 5c, the space efficiency is good and the refrigerator is low-cost.

  In the refrigerator 1 of the present embodiment, the peripheral length 13 d of the outlet opening 13 c of the cold air collecting duct 13 is provided with the freezer damper 50, and a plurality of outlets 3 c to 3 c of the freezing temperature zone chamber 60 positioned in front of the internal fan 9. The total circumference is shorter than 5c. Further, the peripheral length 102 a of the opening 102 of the freezer compartment damper 50 is made shorter than the total peripheral length of the plurality of outlets 3 c to 5 c of the freezing temperature zone chamber 60 positioned in front of the internal fan 9. These make the refrigerator highly reliable. The reason will be explained below.

In general, the purpose of installing a damper is to shut off cold air when closed. Therefore, even if it is an air path provided with a damper, unless cool air is reliably interrupted | blocked, it will happen that desired performance will not come out, and reliability falls. On the other hand, since a minute gap is generally generated at the contact portion between the structure and the structure, for example, the open / close plate 104 (more precisely, the open / close plate 104 is provided even when the freezer damper 50 is closed). A small amount of cold air leaks from a minute gap formed between the buffer member 104 a) and the frame 103. Further, as shown in FIG. 9, the freezer compartment damper 50 is installed at the outlet opening 13c portion of the cold air collecting duct 13. However, a minute gap is generated between the outlet opening 13c and the freezer compartment damper 50, and a small amount of Cold air leaks out. In order to reduce the problem of cold air leakage and to make a highly reliable refrigerator, it is effective to shorten the length of the seal portion from which cold air leaks. For example, when it is considered that a damper is installed at each of the outlets 3c to 5c, at first glance, it seems that the air flow to the freezing temperature zone 60 can be surely blocked, but the seal part of the damper itself, And the lengths of the sealing portions between the blowout ports 3c to 5c forming members (each approximately equal to the circumferential length of the blowout port) become long, and the cold air easily leaks out. On the other hand, in the refrigerator 1 according to this embodiment, the peripheral length 13d of the outlet opening 13c of the cold air collecting duct 13 is set to 463 mm, and the freezing temperature zone 6 positioned in front of the internal fan 9 is used.
The plurality of zero outlets 3c to 5c are sufficiently shorter than the total circumferential length of 1200 mm. Further, the peripheral length 102a of the opening 102 of the four freezer dampers 50 is set to 430 mm, which is sufficiently shorter than the total peripheral length 1200 mm of the plurality of outlets 3c to 5c of the freezing temperature zone chamber 60. Thereby, since the influence of the cold air leak at the time of making the freezer compartment damper 50 into a closed state can be reduced, it becomes a highly reliable refrigerator.

In the refrigerator 1 of this embodiment, the area of the outlet opening 13c of the cold air collecting duct 13 is made larger than the opening area of the freezer damper so as to include the freezer damper 50. When the opening area of the freezer damper 50 and the area of the outlet opening 13c of the cold air collecting duct 13 coincide with each other, the mounting position of the freezer damper 50 may slightly shift due to the influence of the skill of the assembly operator. In this case, the cross section of the air path through which the cold air passing through the freezer compartment damper 50 is reduced may cause a problem that the ventilation resistance is increased. In the refrigerator 1 of the present embodiment, than the opening area 6300Mm ² of the freezing chamber damper is the area of the outlet opening 13c of the cool air aggregate duct 13 to prepare for the freezer compartment damper 50 to increase the 8105.5mm ^2. Therefore, it becomes a highly reliable refrigerator that is unlikely to have a problem that the ventilation resistance changes due to the influence of the skill of the assembly operator.

  In the refrigerator 1 of this embodiment, a single damper (freezer compartment damper 50) is disposed in the outlet opening 13 c of the cold air collecting duct 13. In general, in a refrigerator such as this embodiment, damper opening / closing control is performed by a preinstalled program, but the program is accompanied by bugs (it is extremely difficult to create a program without bugs). In consideration of this, when a plurality of freezer compartment dampers 50 are provided to control the blowing of air to the freezing temperature zone chamber 60, the control program becomes more complicated, and the probability of an unintended operation due to a bug increases. Therefore, in the refrigerator 1 of the present embodiment, the single freezer damper 50 is not only space efficient and low cost, but also a highly reliable refrigerator that is unlikely to malfunction due to bugs. Yes.

  The refrigerator 1 of the present embodiment includes an internal fan 9 above the cooler 7, and an outlet opening 13 c of the cold air collecting duct 13 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 1 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 transferred to the cold air collecting duct 13 by the cold air collecting duct 13. It flows without diverting toward the outlet opening 13c (toward the freezer compartment 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 1 of the present embodiment, as described above, the internal fan 9 is provided above the cooler 7, and the outlet opening 13 c of the cold air collecting duct 13 in which the freezer damper 50 is installed above the internal fan 9. Since it has a structure, after passing through the cooler 7, the airflow is not increased by suppressing the turning of the cold air that has been pressurized by the internal fan 9 toward the freezer compartment 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.

  In the refrigerator 1 of the present embodiment, as shown in FIG. 9, the internal fan 9 is disposed so as to be inclined from the vertical plane to the cooler storage chamber 8 side (back side) by an angle α1. As a result, since the flow through the cooler 7 can be smoothly directed to the outlet opening 13c (freezer compartment damper 50) of the cold air collecting duct 13, the fan power when sending the necessary air volume can be suppressed, and the energy saving performance can be reduced. improves.

  The refrigerator 1 of the present embodiment includes an internal fan 9 above the cooler 7, an outlet opening 13c of the cold air collecting duct 13 above the internal fan 9, and an internal fan above the cold air collecting duct outlet opening 13c. 9 is provided with a blowout port (upper freezer compartment blowout port 4c) for blowing out the main cooling air of the food storage chamber (freezing temperature zone chamber 60) located in front of 9. Thereby, it is a refrigerator with high energy-saving property. The reason will be explained below.

  In general, the cold air that has been heat-exchanged by the cooler 7 and has a low temperature relative to the ambient temperature forms a downward flow from the upper side to the lower side after being blown into the food storage chamber, so that more cold air is supplied to the upper side of the chamber. By doing so, the room can be cooled well. Therefore, the upper stage freezer compartment outlet 4c requires a large amount of discharged air. Therefore, in the refrigerator 1 of the present embodiment, the upper stage freezer compartment outlet 4c is the largest among the outlets of the freezing temperature zone chamber 60. Although the opening area is used, in order to obtain a large amount of discharge 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 1 of the present embodiment, as described above, the internal fan 9 is disposed above the cooler 7, the outlet opening 13 c (the freezer damper 50) of the cold air collecting duct 13 is disposed above the internal fan 9, and the cold air collecting duct. Since the upper freezer compartment outlet 4c is provided above the thirteen outlet openings 13c (freezer compartment damper 50), the cool air smoothly flows toward the upper freezer compartment outlet 4c that requires a large amount of discharge air. Thereby, since the fan power at the time of sending required air volume can be suppressed, energy saving property improves.

  As shown in FIG. 9, the refrigerator 1 of the present embodiment is configured such that the opening 102 of the freezer damper 50 is inclined from the vertical plane toward the internal fan side by an angle α2. As a result, the cool air smoothly flows toward the upper freezer compartment outlet 4c that requires a large amount of discharged air, and the fan power when the required amount of air is sent can be suppressed, so that energy saving is improved.

  The refrigerator 1 of this embodiment is provided with another food storage room (refrigeration room 2) above the food storage room (freezing temperature zone room 60) located in front of the internal fan 9. The refrigerator 1 according to the present embodiment has a structure in which the internal fan 9 is provided above the cooler 7 and the outlet opening 13c of the cold air collecting duct 13 is provided above the internal fan 9, so that the cool air can smoothly flow upward. It is a flowing structure. Therefore, if another food storage room is provided further upward, the cold air can be smoothly fed, so that the fan power when sending the necessary air volume to another food storage room (refrigeration room 2) can be suppressed, thus saving energy. Improves.

  In the refrigerator 1 of the present embodiment, the food storage chamber located in front of the internal fan is a freezing temperature zone 60 that is maintained in the freezing temperature zone. Thereby, it becomes a refrigerator with high energy saving property. The reason will be explained below.

  In general, in a refrigerator that cools the inside of a refrigerator by boosting the cold air cooled by the cooler with an internal fan and circulating it in the internal compartment, the cold air cooled by the cooler is near the internal fan discharge area. Since the temperature has not risen, the temperature tends to be the lowest. Therefore, if the food storage room located in front of the internal fan 9 is, for example, a refrigeration room or a vegetable room maintained in a refrigeration temperature zone, the food is cooled to a temperature (minus temperature) below the refrigeration temperature zone. Problems such as freezing may occur. In order to avoid such a situation, it must be heated by a heater and maintained in a refrigerated temperature zone. Therefore, since the electric power for performing heater heating for temperature compensation is newly required while cooling the inside of a store | warehouse | chamber, energy saving property is low. On the other hand, when the food storage room located in front of the internal fan 9 is a room maintained in the freezing temperature zone (the freezing temperature zone room 60) as in the refrigerator 1 of the present embodiment, the temperature tends to be low. Since properties can be used effectively, energy saving is high.

  In addition, when the food storage chamber located in front of the internal fan 9 is the freezing temperature zone chamber 60, even if the freezing chamber damper 50 is in the closed state, the open / close plate 104 and the frame 103 of the freezing chamber damper 50 are in between. Cold air leakage occurs from the minute gap that occurs or the minute gap that occurs between the outlet opening 13c of the cold air collecting duct 13 where the freezer compartment damper 50 is installed and the freezer compartment damper 50. When the food storage chamber located in front of the internal fan 9 is the refrigeration temperature zone chamber 60, the leakage of cold air may cause a significant decrease in reliability and energy saving. The reason will be explained below.

  As described above, the refrigerator of the present embodiment performs the refrigerating room operation and the frost cooling operation with the freezer damper 50 closed. In this operation mode, since only the refrigerated temperature zone 61 is blown, cold air having a relatively high temperature circulates. Therefore, in these operation modes, if cool air having a relatively high temperature leaks into the freezing temperature zone chamber 60, the freezing temperature zone chamber 60 will be warmed, and the problem that the frozen food can be dissolved may occur. . Moreover, warming the freezing temperature zone chamber 60 increases the thermal load when cooling the freezing temperature zone chamber 60. In order to cool the freezing temperature zone chamber 60, it is necessary to set a cooler temperature as low as, for example, −25 ° C., which is lower than the freezing temperature zone temperature. Low (low coefficient of performance). Therefore, if cold air leaks and the freezing temperature zone chamber 60 is warmed, the load during the freezing chamber operation is increased and energy saving performance is reduced. As described above, when there is a cold air leak to the freezing temperature zone chamber 60 in the cold room operation or the frost cooling operation performed in the closed state of the freezer damper 50, the problem of reliability that the frozen food can be dissolved, The problem that energy saving property falls occurs. Therefore, when the food storage chamber located in front of the internal fan 9 is the freezing temperature zone 60, the structure for reducing the cold air leakage described above is particularly effective.

  The refrigerator 1 according to the present embodiment includes a refrigeration room 2 that is maintained in a refrigeration temperature zone above a food storage room (a freezing temperature zone room 60) located in front of the internal fan 9. As described above, it is advantageous to provide another food storage chamber further upward in order to efficiently cool by using the upward flow. However, since the distance from the internal fan 9 is long (the air path is long), and the low-temperature cold air may have a high density and downward force, the air volume is positioned in front of the internal fan 9. Less than the food storage room (freezing temperature zone 60). Therefore, a room maintained in a freezing temperature zone that requires a lot of cold air (air volume) to maintain a low temperature above the food storage room (freezing temperature zone room 60) located in front of the internal fan 9 is provided. It is not desirable to arrange it. That is, it is desirable to dispose a room maintained in the refrigerated temperature zone above the food storage chamber (freezing temperature zone chamber 60) located in front of the internal fan 9.

  The refrigerator 1 of the present embodiment includes a refrigerator compartment 2 above the food storage compartment (freezing temperature zone 60) located in front of the internal fan 9, and a vegetable compartment 6 below. This makes it easier to keep the refrigeration room and vegetable room at the proper temperature. The reason will be explained below.

  In general, the refrigerated room and the vegetable room are both kept in the refrigerated temperature range, but the vegetable room may contain foods that are sensitive to low temperatures (foods that cause low temperature damage). On the other hand, it is desirable to keep the temperature slightly higher (for example, 3 ° C. in the refrigerator compartment, 5 ° C. in the vegetable compartment, etc.). Therefore, when the vegetable room is a refrigerator that is too cold, it is necessary to provide a heater in the vegetable room and maintain it at a predetermined temperature by heating the heater. In the case of such a refrigerator, the energy saving performance is deteriorated by the heater power. In order to avoid such a situation, it is necessary to cool the vegetable room with a cooling capacity lower than that of the refrigerator room. That is, it is effective to send cold air having a higher temperature than the cold air sent to the refrigerator compartment 2 to the vegetable compartment 6, or to send a small amount of cold air than the refrigerator compartment 2 at the same temperature. In the refrigerator 1 of this embodiment, the refrigerator compartment 2 is provided above the freezing temperature zone chamber 60, and the vegetable compartment 6 is provided below the freezing temperature zone chamber 60. Thus, as in the refrigerator 1 of this embodiment. In the case where the refrigerator compartment 2 and the vegetable compartment 6 are arranged in series, cold air whose temperature has been increased by cooling the refrigerator compartment 2 can be sent to the vegetable compartment 6, so that even if the air volume is the same, it is sent to the refrigerator compartment 2 Cold air having a temperature higher than that of the cold air can be sent to the vegetable compartment 6, and the refrigerator compartment 2 and the vegetable compartment 6 can be easily maintained at an appropriate temperature.

Moreover, as another embodiment, the case where the refrigerator compartment 2 and the vegetable compartment 6 are arranged in parallel is also considered.
In this case, as described above, since the cold air from the internal fan 9 that is easy to go to the upper refrigerator compartment 2 is forced to turn downward to the vegetable compartment 6, it is particularly considered. Without it, the ventilation resistance of the air passage toward the vegetable compartment 6 is increased. Therefore, in this case, the cold air having the same temperature reaches the refrigerator compartment 2 and the vegetable compartment 6, but the air volume to the vegetable compartment 6 can be easily kept low, and the refrigerator compartment 2 and the vegetable compartment 6 are kept at an appropriate temperature. It becomes easy.

  For the above reasons, it is easy to keep the refrigerator compartment 2 and the vegetable compartment 6 at an appropriate temperature by arranging the refrigerator compartment 2 above the freezing temperature compartment 60 and the vegetable compartment 6 below the freezing compartment 60.

  In the refrigerator 1 of the present embodiment, the main surface forming the freezer damper 50 (the surface forming the frame 103) is disposed so as to be inclined by β2 from 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 addition, β2 is set to 6 degrees, but if β2 is set to 6 degrees or more, water can easily flow down, and the probability of a defective accident caused by freezing of accumulated water can be sufficiently lowered, and reliability is improved. It becomes a high refrigerator.

  In the refrigerator 1 of the present embodiment, the freezer damper 50 includes an opening 102, a rotating shaft 101 near one side of the opening 102, and an opening / closing plate 104 that is linked to the rotating operation of the rotating shaft 101. The opening / closing control of the opening 102 is performed by the angular position of the opening / closing plate 104 around the rotation shaft 101. By utilizing the rotational movement of the opening / closing plate 104, the opening / closing plate 104 can be pressed against the surface 102 a of the opening 102 facing the opening / closing plate 104 by a simple mechanism, and the closed state of the opening 102 can be reliably formed. Thereby, it becomes a low-cost and highly reliable damper.

  In the refrigerator 1 of this embodiment, the freezer compartment damper 50 is arrange | positioned so that the rotating shaft 101 of the freezer compartment damper 50 may become an upper side. As a result, a highly reliable refrigerator in which a malfunction such as the freezer compartment damper 50 becoming unrotatable due to water remaining in the vicinity of the rotating shaft 101 and freezing is unlikely to occur.

  In the refrigerator 1 of the present embodiment, the open / close plate 104 of the freezer damper 50 is disposed so as to open to the cold air collecting duct 13 side. Considering the closed state of the freezer compartment damper 50, for example, conversely, the case where the freezer compartment damper 50 is opened to the freezing temperature zone chamber 60 side, the cold air collecting duct 13 side, that is, the discharge area side of the internal fan 9 is considered. Since the pressure is high and the pressure on the freezing temperature zone chamber 60 side is low, a force is applied in the direction in which the opening / closing plate 104 opens. On the other hand, if the opening / closing plate 104 is opened to the cold air collecting duct 13 side, a force is applied in the direction of increasing the sealing degree. Therefore, in the refrigerator 1 of the present embodiment, the open / close plate 104 of the freezer compartment damper 50 is disposed so as to open to the cold air collecting duct 13 side, so that leakage from the seal portion 102a of the freezer compartment damper 50 is less likely to occur. It has become a highly reliable refrigerator.

  In the refrigerator 1 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, as shown in FIG. 9, the degree of blockage of the inflow portion of the refrigerator compartment duct 11 is controlled by the opening angle of the freezer damper 50 so that the amount of cool air blown into the refrigerator compartment 61 is made appropriate. is there. For example, if the opening angle θ of the freezer damper 50 is increased (for example, 90 degrees) during the refrigerating operation, the degree of blockage of the inflow portion of the refrigerating room duct 11 increases, so that the ventilation resistance of the refrigerating room duct 11 increases. The air volume to the refrigerated temperature zone 61 is reduced. Therefore, cooling of the refrigeration temperature zone 61 is suppressed. On the other hand, if the open angle θ of the freezer damper 50 is made smaller (for example, 45 degrees), the ventilation resistance of the refrigerator compartment duct 11 becomes smaller, and the refrigerator compartment 61 is further cooled. In addition, when the opening angle of the freezer compartment damper 50 is made smaller than 60 degrees, the ventilation resistance of the flow toward the refrigeration temperature zone chamber 61 is decreased and the ventilation resistance of the flow toward the freezer temperature zone chamber 60 is increased. Therefore, it is possible to perform cooling with emphasis on the refrigeration temperature zone chamber 61 while cooling the freezing temperature zone chamber 60. That is, in the refrigerator 1 of this embodiment, the air volume of the freezing temperature chamber 60 and the refrigerating temperature zone chamber 61 can be adjusted by the open angle θ of the freezer damper 50, and each room is easily adjusted to an appropriate temperature.

The refrigerator 1 of this embodiment is provided with a heater that is in thermal contact with the freezer damper 50.
Thereby, even if the freezer compartment damper 50 freezes and cannot be rotated, it can be melted by the heater, so that the refrigerator is highly reliable.

  In the refrigerator 1 of the present 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. A freezer compartment duct 12 is disposed in front of the cold air collecting duct 13 so as to cover the front surface of the cold air collecting duct 13. Thereby, energy saving property can be made high. The reason will be explained below.

  As described above, the refrigerator 1 of the present embodiment includes the freezer damper 50 and performs the refrigerator compartment cooling operation. In the refrigerating room cooling operation, only the refrigerating temperature zone 61 is cooled, so that cool air at a relatively high temperature circulates. Thereby, the temperature of the cooler 7 is increased, the efficiency of the refrigeration cycle (coefficient of performance: COP) is increased, and the energy saving property is increased.

  However, in the configuration in which the front of the cooler storage chamber 8 is the refrigeration temperature zone chamber 60, when the refrigeration temperature zone chamber 60 and the cooler storage chamber 8 are not insulated, the cooler 7 is Chilled. As a result, the temperature of the cooler 7 does not rise, and an efficient operation cannot be performed. Further, during the cold room cooling operation, cool air having a relatively high temperature flows in the cool air collecting duct 13. Therefore, the cold air in the cold air collecting duct 13 is cooled from the freezer compartment 60, and the temperature of the circulating cold air is lowered. Thereby, the temperature of the cooler 7 decreases.

  Therefore, in the refrigerator 1 of this embodiment, the warm air storage space 26 is provided in front of the cooler storage chamber 8, and the freezer compartment duct 12 is provided in front of the cold air collecting duct 13. Thereby, it becomes an air insulation layer at the time of a refrigerator compartment cooling operation and a frost cooling operation, and can improve energy saving property.

  Further, in the refrigerator 1 of the present embodiment, vacuum is applied to at least one or all of the front surface of the cooler storage chamber 8, the bottom surface of the refrigerating chamber 2, the front surface of the refrigerating chamber-vegetable chamber communication duct 16, and the upper surface of the vegetable chamber return duct 18. A heat insulating material 25 is provided. In other words, a duct through which the return cold air after being blown from the cooler storage chamber 8 to the refrigeration temperature zone chamber 61 flows is provided on the side of the cooler 7 and behind the refrigeration temperature zone chamber 60. A vacuum heat insulating material 25 is provided between the freezing temperature zone chamber 60. Thereby, it can suppress that the heat | fever of the air with comparatively high temperature circulated at the time of a refrigerator compartment cooling operation is transmitted to the freezing temperature zone room 60, and is heated. In addition, the fact that the freezing temperature zone 60 is not easily warmed makes it difficult for the temperature of the circulating cold air to decrease. Therefore, it is possible to suppress a decrease in the temperature of the cooler 7 due to a decrease in the temperature of the circulating cold air during the refrigerating room cooling operation, and it is possible to suppress a decrease in energy saving.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigeration room 3 Ice making room 4 Upper freezing room 5 Lower freezing room 6 Vegetable room 7 Cooler 8 Cooler storage room 9 Fan in a refrigerator 10 Insulation box 11 Refrigeration room duct 12 Freezing room duct 13 Cold air collecting duct 16 Refrigeration room -Vegetable room communication duct 17 Freezing room return port 18 Vegetable room return duct 18a Vegetable room return outlet 19 Machine room 20 Refrigeration room damper 21 Evaporating dish 22 Defrost heater 23 樋 24 Compressor 26 Warm air storage space 31 Control board 33 Refrigeration room Temperature sensor 33a Vegetable room temperature sensor 34 Freezer room temperature sensor 35 Cooler temperature sensor 50 Freezer room damper 53 Upper cover 54 Partition plate 60 Freezing temperature zone room 61 Refrigeration temperature zone room 70 Fan cover 71 Fan hold 75 Communication hole 100 Driving means 101 Rotating shaft 102 Opening 103 Frame 104 Opening and closing plate

Claims (3)

A refrigeration temperature zone chamber and a refrigeration temperature zone compartment defined in the refrigerator body,
A cooler in which cold air that cools the freezing temperature zone chamber and the refrigeration temperature zone chamber is heat-exchanged;
A cooler storage chamber in which the cooler is provided at the back of the freezing temperature zone chamber ;
An internal fan above the cooler that blows cold air heat-exchanged by the cooler to the freezing temperature zone chamber and the refrigeration temperature zone chamber;
Have a opening that communicates with the freezing temperature zone compartment provided so as to cover the front of該庫the fan above the in-compartment fan, wherein the in-compartment fan for blowing air to the freezing temperature zone compartment and the refrigerating temperature zone compartment A fan cover that forms a cool air collecting duct that collects cool air on the discharge side of
A damper provided in the opening of the fan cover for controlling air flow ;
And an upper outlet of said opening for blowing cold air to the freezing temperature zone compartment located in front of the in-compartment fan,
A freezer compartment duct that is provided so as to cover the front of the fan cover and blows cool air from the opening to the outlet ;
The refrigerator, wherein an air heat insulating layer formed by the cold air collecting duct and the freezer compartment duct is formed between the freezing temperature zone chamber and the cooler storage chamber .   The refrigerator according to claim 1, wherein a space is provided in front of a lower portion of the cooler storage chamber, into which an updraft during defrosting of the cooler flows.   3. The duct according to claim 1 or 2, wherein a duct through which return cold air after being blown from the cooler storage chamber to the refrigeration temperature zone chamber flows is provided at a side of the cooler and at the rear of the refrigeration temperature zone chamber. And a refrigerator temperature zone chamber, wherein a vacuum heat insulating material is provided.

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