JP6876901B2 - Damper device and refrigerator using it - Google Patents

Description

The present invention relates to a damper device and a refrigerator in which a damper device is installed in a freezing chamber duct.

Generally, in a refrigerator, cold air is generated in a cooling chamber on the back of the refrigerator body, and the cold air is circulated to a refrigerator compartment, a freezer compartment, a vegetable compartment, etc. by a cooling fan to cool the food in each chamber. In addition to being equipped with a refrigerator compartment damper that adjusts the amount of cold air circulation in the refrigerator, there is also a refrigerator compartment damper that controls the amount of cold air circulation to the freezer compartment so that the refrigerator compartment and the freezer compartment can be cooled efficiently (for example). , Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-7452

However, in the above-mentioned conventional refrigerator, the condensed water adhering to the freezing chamber damper may freeze and the freezing chamber damper may not be sufficiently opened and closed.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a damper device and a refrigerator capable of suppressing a problem of not opening and closing due to freezing.

In order to solve the above-mentioned conventional problems, the damper device of the present invention includes a frame having an opening, a second opening provided below the opening of the frame, a drive unit, and the opening. A plurality of flaps provided side by side in the vertical direction are provided at positions facing the above, and each of the plurality of flaps has a first state in which the opening is opened and the opening from the first state. In the second state in which the ventilation resistance is large, the damper device is rotated by the drive unit. In the second state, each of the plurality of flaps is inclined with respect to the opening and the said. The second opening is provided at a position facing the lower end of the lowermost flap of the plurality of flaps and the lower portion of the frame body .

The damper device and the refrigerator of the present invention can suppress a problem that the damper device and the refrigerator do not open and close due to freezing.

Front view of the refrigerator according to the first embodiment of the present invention Front view showing the inside of the refrigerator in the same embodiment Sectional view of the refrigerator in the same embodiment Explanatory drawing explaining the cold air flow of the refrigerator in the same embodiment Sectional drawing which shows the periphery of the defrosting apparatus of a refrigerator in the same embodiment In the same embodiment, (a) a perspective view of a freezer damper, (b) a cross-sectional view with the flap closed, and (c) a cross-sectional view with the flap open. Schematic diagram illustrating a state in which water droplets adhering to the flap of the freezer damper in the same embodiment fall. (A) A perspective view of a freezer damper, (b) a cross-sectional view with the flap closed, and (c) a cross-sectional view with the flap open in a modified example of the same embodiment.

The damper device of the first invention has a frame body having an opening, a second opening provided below the opening of the frame body, a drive unit, and a position facing the opening in the vertical direction. Each of the plurality of flaps is provided with a plurality of flaps arranged side by side in a first state in which the opening is opened, and a second state in which the ventilation resistance of the opening is larger than that in the first state. In addition, the damper device is rotated by the drive unit, and in the second state, each of the plurality of flaps is inclined with respect to the opening, and the second opening is the same. It is provided at a position facing the lower end of the lowermost flap of the plurality of flaps and the lower portion of the frame body.

According to this, the water droplets adhering to the upper surface of one flap fall on the upper surface of the flap adjacent to the lower surface of the flap. Therefore, it is possible to prevent water from bridging or freezing between the flap and the flap adjacent to the lower side of the flap.
In addition, the air passing through the second opening can prevent water from bridging or freezing between the lowermost flap and the frame located below the flap. ..

The second invention includes a freezing chamber, a cooling chamber in which a cooler for supplying cold air to the freezing chamber and a fan are housed, and an air passage in which the cold air cooled in the freezing chamber is returned to the cooling chamber. , The damper device of the first invention is provided.

According to this, it is possible to suppress the problem that the damper device does not open and close, and it is possible to suppress the occurrence of cooling failure in the freezing chamber.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)
1 is a front view of the refrigerator according to the first embodiment of the present invention, FIG. 2 is a front view showing the inside of the refrigerator according to the same embodiment, FIG. 3 is a sectional view of the refrigerator according to the same embodiment, and FIG. 4 is the same embodiment. An explanatory view for explaining the cold air flow of the refrigerator in the embodiment, FIG. 5 is a cross-sectional view showing the periphery of the defrosting device of the refrigerator in the embodiment.

First, the overall configuration of the refrigerator will be described with reference to FIGS. 1 to 4.

In FIGS. 1 to 4, the refrigerator according to the present embodiment includes a refrigerator main body 1 having an open front, and the refrigerator main body 1 includes a metal outer box 2, a hard resin inner box 3, and the outer box. It is composed of a foamed heat insulating material 4 which is foam-filled between the box 2 and the inner box 3, and a plurality of storage chambers are formed by partitions such as partition plates 5 and 6. Further, each storage chamber of the refrigerator main body 1 is openable and closable by a rotary door 7 or a drawer type door 8, 9, 10 and 11 which adopts the same heat insulating structure as the refrigerator main body 1.

The storage chambers formed in the refrigerator main body 1 include a refrigerating chamber 12 at the top, a temperature zone switchable switching chamber 13 provided under the refrigerating chamber 12, and an ice making chamber 14 provided next to the switching chamber 13. It is composed of a freezing chamber 16 provided between the switching chamber 13, the ice making chamber 14, and the vegetable compartment 15 at the bottom. A plurality of shelves 17 are provided in the refrigerating chamber 12, and a partial chamber 18 and a chilled chamber 19 having different cooling temperature zones are provided in two upper and lower stages below the shelf plate 17.

The refrigerating chamber 12 is a storage chamber for refrigerating and storing, and is cooled by setting it to a temperature as low as not to freeze, specifically, usually 1 to 5 ° C. Further, the partial chamber 18 provided in the refrigerating chamber is set to -2 to -3 ° C, which is suitable for microfreezing storage, and the chilled chamber 19 has a temperature of about 1 ° C, which is lower than that of the refrigerating chamber 12 and higher than that of the partial chamber 18. Set and cooled.

The vegetable compartment 15 is a storage chamber whose temperature is set to be equal to or slightly higher than that of the refrigerator compartment 12, and specifically, the temperature is set to 2 to 7 ° C. for cooling. Since the vegetable compartment 15 becomes highly humid due to the moisture emitted from the stored food such as vegetables, dew condensation may occur if it is locally cooled too much. Therefore, by setting the temperature to a relatively high temperature, the amount of cooling is reduced and the occurrence of dew condensation due to local overcooling is suppressed.

The freezing chamber 16 is a storage chamber set in the freezing temperature zone, and specifically, it is usually set to 22 to -18 ° C and cooled, but in order to improve the frozen storage state, for example, -30 ° C or -25 ° C. It may be cooled by setting it to a low temperature such as ° C.

The switching chamber 13 is a storage chamber in which the temperature inside the refrigerator can be changed, and can be switched from the refrigerating temperature zone to the freezing temperature zone according to the application.

On the other hand, a cooling chamber 20 is provided on the back surface of the freezing chamber 16, and the cooling chamber 20 is provided with a cooler 21 for generating cold air and a cooling fan 22 for supplying cold air to each of the chambers. .. Further below the cooler 21, a defrosting means composed of a glass tube heater 23 or the like is provided.

The cooler 21 constitutes a refrigeration cycle by connecting a compressor 24, a condenser (not shown), a heat radiating pipe for heat dissipation (not shown), and a capillary tube (not shown) in an annular shape. Cooling is performed by circulating the refrigerant compressed by the compressor 24.

Further, the cooling fan 22 is provided above the cooler 21, and the refrigerating room 12, the freezing room 16, the vegetable room 15, etc. are provided via the refrigerating room duct 25, the freezing room duct 26, and the vegetable room duct 27 connected to the downstream side thereof. It is designed to supply cold air to each of these chambers.

The cooling chamber 20 and the cold air supply configuration will be described with reference to FIGS. 4 and 5.

A freezing chamber duct 26 communicating with the downstream side of the cooling fan 22 is provided on the front side of the cooling chamber 20. Further, on the downstream side of the cooling fan 22, the refrigerating room duct 25 communicating with the refrigerating room 12 and the vegetable room duct 27 communicating with the vegetable room 15 are connected separately and independently at different positions.

More specifically, the upper part on the downstream side of the cooling fan 22 is connected to the refrigerating chamber duct 25 via the first cold air supply port 34 provided in the partition plate 5 that separates the refrigerating chamber 12 and the freezing chamber 16. A second cold air supply port 35 is provided on the side of the upper part on the downstream side of the cooling fan 22, and the vegetable compartment duct 27 is connected to the cooling fan 22. Then, the cold air generated by the cooler 21 is separately supplied to the first cold air supply port 34 and the second cold air supply port 35 by the cooling fan 22 in an independent manner, and is supplied to the refrigerating room duct 25 and the vegetable room duct 27. ..

The refrigerating chamber duct 25 is configured by covering the surface of a duct member made of styrofoam on the refrigerating chamber side with a resin duct cover. The refrigerating chamber duct 25 is attached to the back surface of the refrigerating chamber so as to cover the first cold air supply port 34, and communicates with the cooling chamber 20.

A refrigerating chamber damper 37 is incorporated in the first cold air supply port 34, and the amount of cold air supplied from the cooling chamber 20 to the refrigerating chamber 12 is controlled by opening and closing the refrigerating chamber damper 37. The refrigerating chamber damper 37 includes a refrigerating chamber damper section that controls the amount of cold air supplied to the refrigerating chamber 12, a partial chamber damper section that controls the amount of cold air supplied to the partial chamber 18, and a refrigerating chamber damper section and a partial chamber. It is provided between the damper section and a damper drive motor unit that independently drives the damper section for the refrigerator compartment and the damper section for the partial chamber.

The refrigerating chamber return duct 25b that communicates with the refrigerating chamber duct 25 and returns the cold air that has cooled the refrigerating chamber 12 to the cooling chamber 20 is installed on the side (horizontal) of the cooling chamber 20. The lower end side portion of the refrigerating chamber return duct 25b is open to the lower side surface of the cooling chamber 20.

The freezing chamber back plate 29 is provided with a plurality of cold air outlets (not shown) in the vertical direction, and the upper cold air outlets supply cold air to the ice making chamber 14 and the switching chamber 13 and lower cold air outlets. The mouth supplies cold air to the freezing chamber 16.

The freezing chamber back plate 29 is provided with a freezing cold air return port 64 communicating with the lower part of the cooling chamber 20 below the cold air outlet. As shown in FIG. 5, the freezing cold air return port 64 has a freezing room side mouth frame portion 65 projecting to the freezing chamber 16 side and a cooling chamber 20 side from the freezing room side mouth frame portion 65 projecting to the freezing chamber 16 side. It is provided with a cooling chamber side mouth frame portion 66 located at. Each frame of the freezing chamber side mouth frame portion 65 and the cooling chamber side mouth frame portion 66 is inclined so as to be located rearward toward the vertical line, that is, on the cooling chamber 20 side. A grill 67 is provided inside the freezing chamber side mouth frame portion 65. A freezing chamber damper 68 is provided inside the cooling chamber side mouth frame portion 66.

The grill 67 rectifies the cold air returning from the freezing chamber 16 to the cooling chamber 20. The grill 67 includes a plurality of horizontally elongated grill pieces 69 in the vertical direction. Each grill piece 69 is inclined so that the end portion on the cooling chamber 20 side is located above the end portion on the freezing chamber 16 side. Further, the lower the grill piece 69, the longer the front-rear length, that is, the length from the end on the freezing chamber 16 side to the end on the cooling chamber 20 side.

The freezing chamber damper 68 controls the opening and closing of the cold air supplied to the freezing chamber 16. The freezing chamber damper 68 is provided along the inclination of the cooling chamber side mouth frame portion 66. That is, the freezing chamber damper 68 is provided so as to be inclined so that the cooling chamber 20 side is located below the freezing chamber 16 side.

The upper portion of the freezer damper 68 (the upper portion of the flange portion 70b of the damper frame 70, which will be described later) is located above the lower end of the cooler 21, and the lower portion thereof (the lower portion of the flange portion 70b of the damper frame 70). A portion) is provided so as to be located below the lower end of the cooler 21. As a result, the cold air that has passed through the open freezing chamber damper 68 flows into the lower end portion of the cooler 21.

The configuration of the freezer damper 68 will be described with reference to FIG. 6 (a) is a perspective view of the freezing chamber damper 68, FIG. 6 (b) is a cross-sectional view of the freezing chamber damper 68 with the flap 71 closed, and FIG. 6 (c) is a flap. It is a cross-sectional view of the freezing chamber damper 68 in a state where 71 is open.

As shown in FIG. 6A, the freezer damper 68 includes a plurality of flaps 71, in this example, three flaps 71 on the damper frame 70. Each of the damper frame 70 and the flap 71 is formed of a heat-resistant resin, for example, a polyphenylene sulfide resin (PPS resin).

The damper frame 70 includes a front portion 70a which is a rectangular flat plate, and a flange portion 70b which is provided on the entire circumference of the front portion 70a and extends substantially vertically from the outer periphery of the front portion 70a. The front portion 70a is provided with a first opening 70c and a plurality of second openings 70d provided below the first opening 70c. The first opening 70c is provided with a plurality of vertical rails 70c1 that partition the first opening 70c into a plurality of parts in the left-right direction.

A plurality of flaps 71 are provided vertically at positions facing the first opening 70c. The plurality of second openings 70d are provided below the lower end of the lowermost flap 71 among the plurality of flaps 71.

The flap 71 is a rectangular plate having a shaft portion at the upper end portion in the lateral direction and pivotally supported by a bearing portion (not shown) formed on the damper frame 70. The flap 71 is held by the flange portion 70b so that the axis of the flap 71 is in the horizontal direction (longitudinal direction of the front portion 70a). The freezing chamber damper 68 is configured such that the shafts of the plurality of flaps 71 are pivotally supported on the freezing chamber 16 side and the lower side portion of the flaps 71 opens toward the cooling chamber 20 side (see FIG. 5). Each of the plurality of flaps 71 is driven by a refrigerating damper driving motor unit 72 fixed to one end of the damper frame 70.

More specifically, the flap 71 includes a drive shaft portion below the shaft portion provided at the upper end portion. The drive shafts of the plurality of flaps 71 are connected to one connecting link member. The connection link member operates by driving the refrigerating damper drive motor unit 72, and each of the flaps 71 opens and closes around the shaft portion.

As shown in FIG. 6B, in the state where the flap 71 is closed, that is, in the second state, the flap 71 closes a part of the first opening 70c, so that the ventilation resistance of the first opening 70c increases. The amount of air passing through the freezer damper 68 is reduced.

When the flaps 71 are closed, the lower side portions 71b of the three flaps arranged in the vertical direction are in the height direction from the flange portion 70b (perpendicular to the front portion 70a, left and right on the paper surface in FIG. 6B), respectively. There is no protrusion in the direction). That is, in the state where the flaps 71 are opened, the three flaps arranged in the vertical direction are in the frame of the damper frame body 70.

When the flap 71 is closed, the lowermost flap 71 does not cover the second opening 70d. That is, when the flap 71 is closed, the second opening 70d is in an open state.

On the other hand, as shown in FIG. 6C, in the state where the flap 71 is opened, that is, in the first state, the area where the flap 71 closes the first opening 70c is reduced, and the amount of air passing through the freezing chamber damper 68 is reduced. Will increase. When the flaps 71 are open, each of the plurality of flaps 71 is substantially parallel to the flange portion 70b.

When the flaps 71 are open, the lower side portions 71b of the three flaps arranged in the vertical direction are in the height direction from the flange portion 70b (perpendicular to the front portion 70a, left and right on the paper surface in FIG. 6C), respectively. There is no protrusion in the direction). That is, in the state where the flaps 71 are opened, the three flaps arranged in the vertical direction are in the frame of the damper frame body 70.

As shown in FIG. 6B, with the flaps 71 completely closed, each of the plurality of flaps 71 is inclined with respect to the height direction of the damper frame 70 in the lateral direction of the flaps 71. It is configured as follows. More specifically, each of the plurality of flaps 71 is configured to be inclined with respect to the front portion 70a so as to be directed upward toward the front portion 70a of the damper frame 70. In other words, the upper side portion 71a, which is the longitudinal side of the upper end side of the flap 71, is pivotally supported on the front portion 70a side of the damper frame 70 with respect to the lower side portion 71b on the lower end side of the flap 71.

The upper edge of the first opening 70c is provided below the lower side portion 71b of the flap 71 located at the uppermost position. Further, the lower edge of the first opening 70c is provided above the lower side portion 71b of the flap 71 located at the lowermost position (see FIG. 6B).

When the plurality of flaps 71 are closed, a predetermined distance is provided in the front-rear direction between the lower side portion 71b of the upper flap 71 and the upper side portion 71a of the flap 71 adjacent to the lower side.

Further, when the freezing chamber damper 68 is provided so as to be inclined with respect to the refrigerator main body 1, the upper side portion 71a of the flap 71 located below is the front portion 70a of the lower side portion 71b of the flap 71 adjacent above. It is pivotally supported on the side (see FIG. 5).

Each of the plurality of flaps 71 is rotated by the refrigerating damper drive motor unit 72 between the state in which the flap 71 shown in FIG. 6 (b) is closed and the state in which the flap 71 shown in FIG. 6 (c) is opened. It moves and its rotation range is less than 90 degrees (see FIG. 6 (c)).

When the freezing chamber damper 68 is provided so as to be inclined with respect to the refrigerator main body 1, the end of each of the plurality of flaps 71 on the freezing chamber 16 side is located above the end on the cooling chamber 20 side. (See FIG. 5).

Since the freezing chamber damper 68 is arranged between the cooling chamber 20 and the freezing chamber 16, it is cooled by cold air. Therefore, when the relatively warm cold air returned to the lower side surface of the cooling chamber 20 via the refrigerating chamber return duct 25b flows into the vicinity of the freezer compartment damper 68 (see FIG. 3), the upper surface of the flap 71 (cooling). Water may condense on the surface of the chamber 20 side) or the damper frame 70.

However, according to the present embodiment, as shown in FIG. 7, the condensed water adhering to the upper surface of the flap 71 (the surface on the cooling chamber 20 side) flows down the upper surface of the flap 71 toward the lower side portion 71b. Then, it falls from the central portion of the upper surface of the flap 71 provided below to the lower side portion 71b side. Therefore, it is possible to prevent the dew condensation water from being bridged between the lower side portion 71b of the flap 71 and the upper side portion 71a of the flap 71 provided below the flap 71. Therefore, the condensed water held between the plurality of flaps 71 can be prevented from being cooled by the cooler 21 and freezing. Therefore, it is possible to suppress a problem that the flap 71 does not rotate. Further, the size of the freezing chamber damper 68 in the height direction can be made compact by providing a predetermined interval in the front-rear direction.

Further, since the flaps covering the first opening are divided into a plurality of flaps 71 in the vertical direction and the plurality of flaps 71 move within the frame of the damper frame 70, the freezer damper 68 can be made compact. .. Further, it is not necessary to provide a movable space for the flap 71 between the freezing chamber damper 68 and the cooler 21 arranged at the rear, the cooling chamber 20 can be made compact, and the internal space can be increased. It is desirable that the plurality of flaps 71 do not protrude from any of the flange portions 70b around the damper frame body 70 (up, down, left, and right).

Further, the lower end of the flap 71 is provided above the upper end of the flap 71 provided below the flap 71. Further, it is desirable to provide a predetermined distance between the lower end of the flap 71 and the upper end of the flap 71 provided below the flap 71. According to this, it is possible to further suppress the freezing of the condensed water between the plurality of flaps 71.

As shown in FIG. 6A, a second opening 70d is provided below the front surface portion 70a. Due to the flow passing through the second opening 70d, it is possible to prevent the dew condensation water from staying between the lower end of the lowermost flap 71 of the plurality of flaps 71 and the lower flange portion 70b. Therefore, it is possible to prevent the condensed water from freezing between the lowermost flap 71 among the plurality of flaps 71 and the lower flange portion 70b. Although the plurality of flaps 71 has been described as three flaps in the vertical direction, any number of the plurality of flaps 71 may be used as long as they are two or more. Further, if a predetermined distance can be secured between the adjacent flaps 71 so that the condensed water does not crosslink, the flaps 71 are not arranged at an angle with respect to the damper frame 70 as described above. It may be arranged parallel to the first opening 70c of the damper frame body 70.

Further, a plurality of second openings 70d may be connected to form one horizontally long opening extending in the left-right direction of the front portion 70a. In this case, it is desirable that the width of the second opening 70d is substantially equal to the width of the first opening 70c.

Further, as shown in FIG. 8, each of the plurality of second openings 70d is located above the second opening 70d among the plurality of first openings 70c partitioned by the vertical rail 70c1. It may be connected to the opening 70c. In other words, the lower edge of the first opening 70c may be provided below the lower side portion 71b of the flap 71 located at the lowermost position (see FIG. 8B).

Also in the form shown in FIG. 8, similarly to the form shown in FIG. 6, the plurality of flaps 71 are placed between the closed state and the open state of the flaps 71 in the frame of the damper frame body 70, respectively. Since it moves, the freezer damper 68 can be made compact. Then, the space inside the refrigerator can be increased.

The above-mentioned freezing chamber damper 68 is provided only in the freezing cold air return port 64, and the cold air discharge passage from the cooling chamber 20 to the cold air outlet is not provided with a damper, and the cooling chamber 20 and the freezing chamber 16 are in a communicating state. It is kept in.

Next, the indoor configuration of the cooling chamber 20 and the configuration around the glass tube heater 23 will be described with reference to FIGS. 3 and 5.

The cooling chamber 20 is located on the back surface of the freezing chamber 16 and is formed by a cooling chamber forming plate 28 and an inner box 3 as shown in FIG. 5. Cooling is performed by mounting a cooling fan 22 on the cooling chamber forming plate 28. The cooling fan 22 is located above the vessel 21. Further, a freezing chamber back plate 29 is attached to the front side of the cooling chamber forming plate 28 to cover the downstream side of the cooling fan 22 and form a freezing chamber duct 26 communicating with the cooling fan downstream side between the cooling chamber 20 and the cooling chamber 20. ing.

Further, as shown in FIG. 5, a heater cover 30 having an umbrella-shaped cross section covering the glass tube heater 23 is installed below the cooler 21, and drainage for discharging defrosted water to the outside is installed on the bottom surface of the cooling chamber 20. A mouth 31 is provided. Further, the heater cover 30 is provided with a shielding member 32 extending between the glass tube heater 23 and the freezing chamber back plate 29. Further, a plurality of slit holes are formed in the shielding member 32. Further, the tip 33 of the shielding member 32 is located above the lower end of the glass tube heater 23 and below the upper end of the glass tube heater 23.

Further, the lower end of the freezing chamber back plate 29 is located above the virtual extension line connecting the lower end of the glass tube heater 23 and the tip end 33 of the shielding member 32.

Further, the upper surface of the heater cover 30 is inclined downward from the front (freezing chamber side) to the rear (back side) where the shielding member 32 extends.

The operation and operation of the refrigerator configured as described above will be described below.

When the temperature of the refrigerator compartment 12 becomes higher than the set temperature, the refrigerator drives the compressor 24 and the cooling fan 22, and supplies the cold air generated by the cooler 21 to the downstream side of the cooling fan 22.

The cold air supplied to the downstream side of the cooling fan 22 is supplied to the refrigerating chamber duct from the first cold air supply port 34 opening on the upper upper surface on the downstream side of the cooling fan via the refrigerating chamber damper, and the left and right side surfaces of the refrigerating chamber duct. The inside of the refrigerating chamber 12 is cooled by blowing out to the refrigerating chamber 12 from the cold air outlet opened in.

Further, the cold air supplied to the downstream side of the cooling fan 22 is also supplied to the vegetable compartment duct from the second cold air supply port 35 opening on the upper side surface on the downstream side of the cooling fan via the vegetable compartment damper, and is also supplied to the vegetable compartment duct. It is supplied to the vegetable compartment 15 from the lower end opening of the vegetable chamber 15 and cools the inside of the vegetable compartment 15.

Then, when the temperature of the vegetable compartment 15 whose cooling temperature is set higher than that of the refrigerator compartment reaches the set temperature, the vegetable chamber damper is closed, the supply of cold air to the vegetable chamber 15 is stopped, and the vegetable chamber is kept at the set temperature.

Further, the cold air from the cooling chamber 20 is supplied to the freezing chamber 16 through the freezing chamber duct 26, and returns to the cooler 21 from the freezing cold air return port 64 at the lower front part of the cooling chamber 20.

Then, in order to remove the frost adhering to the cooler 21 every predetermined time cooling, the glass tube heater 23 is energized and discharged from the drain port 31 to the outside of the refrigerator.

At this time, between the glass tube heater 23 and the cooler 21, a heater cover 30 is provided below the cooler 21 to prevent defrost water falling from the cooler 21 from directly dripping onto the glass tube heater 23. Therefore, it is possible to suppress the evaporation noise when the defrosting water is directly dropped onto the glass tube heater 23 and to suppress the temperature drop on the surface of the glass tube heater 23.

Further, during the above-mentioned periodic defrosting, the frost of the cooler 21 is removed by the radiant heat and convection from the glass tube heater 23, but at the same time, the radiant heat reaches the periphery other than the cooler 21. In particular, the resin-molded cooling chamber forming plate 28 causes problems such as deformation when the heat-resistant temperature of the resin component is exceeded. However, in the present embodiment, the heater cover 30 includes the glass tube heater 23 and the freezer chamber back plate 29. Since the shielding member 32 extending between them is provided, it is possible to suppress the temperature rise of the freezing chamber back plate 29 at the time of defrosting, and it is possible to suppress the deformation of the freezing chamber back plate 29.

Further, since the shielding member 32 is formed with a plurality of slit holes, it is possible to prevent hot air from stagnation in the space between the glass tube heater 23 and the heater cover 30, and the glass tube heater 23 can be prevented from stagnation.
Excessive temperature rise on the surface can be suppressed.

Further, since the tip 33 of the shielding member 32 is located above the lower end of the glass tube heater 23 and below the upper end of the glass tube heater 23, the radiant heat from the glass tube heater 23 is directly directed to the freezing chamber back plate 29. It is possible to surely prevent hitting.

As described above, the damper device according to the present invention can be applied to applications such as household refrigerators and commercial refrigerators.

1 Refrigerator body 2 Outer box 3 Inner box 4 Foam insulation 5 Partition plate 7, 8 Doors 12 Refrigerator room 13 Switching room 14 Ice making room 15 Vegetable room 16 Freezing room 17 Shelf board 18 Partial room (low temperature room)
19 Chilled room (low temperature room)
20 Cooling room 21 Cooler 22 Cooling fan 23 Glass tube heater 24 Compressor 25 Refrigerating room duct 25b Refrigerating room return duct 26 Freezing room duct 27 Vegetable room duct 28 Cooling room forming plate 29 Freezing room back plate 30 Heater cover 31 Drain port 32 Shielding member 33 Tip 34 1st cold air supply port 35 2nd cold air supply port 64 Refrigerator cold air return port 65 Refrigerator room side mouth frame part 66 Cooling room side mouth frame part 67 Grill 68 Freezer room damper 69 Grill piece 70 Damper frame 70a Front part 70b Flange part 70c First opening 70c1 Vertical rail 70d Second opening 71 Flap 71a Upper side 71b Lower side 72 Refrigerating damper drive motor unit

Claims (2)

A frame with an opening and
A second opening provided below the opening of the frame body and
Drive unit and
A plurality of flaps provided side by side in the vertical direction at positions facing the opening,
With
Each of the plurality of flaps is a damper device that is rotated by the drive unit into a first state in which the opening is opened and a second state in which the ventilation resistance of the opening is larger than that in the first state. And
In the second state, each of the plurality of flaps is inclined with respect to the opening, and the second opening is formed on the lower end of the lowermost flap of the plurality of flaps and the frame body. dampers device provided in opposing positions between the lower. Freezing room and
It is equipped with a cooler that supplies cold air to the freezer and a cooling room that houses a fan.
A refrigerator provided with the damper device according to claim 1 in an air passage through which cold air cooled in the freezing chamber is returned to the cooling chamber.

Images