CN206875810U - Freezer - Google Patents

Abstract

Freezer includes：Heat insulating box (31), cooler (44), blower fan (46) and the cooling chamber (43) of foamed heat-insulating material (34) are filled between interior case (33) and outer container (32).Freezer also includes：Overleaf it is provided with the refrigerating chamber (37) of cooling chamber (43)；Switching chamber (36)；The first partition wall (71) that refrigerating chamber (37) and switching chamber (36) are separated；With the switching chamber throttle setting in the wind path internal control cooling flow amount from cooling chamber (43) to switching chamber (36) transporting cold-air.In addition, the switching chamber throttle setting of freezer is installed on the first partition wall (71), and foamed heat-insulating material (34) is filled in the first partition wall (71).

Description

Cold storage

technical field

The utility model relates to the structure of a refrigerator including a damper device.

Background technique

In the prior art, there is a structure in which a plurality of storage rooms are formed by using a heat-insulating partition wall for the main body of the refrigerator, cool air from a cooler is blown to each storage room through a damper device, and the storage room is controlled to a predetermined temperature (for example, , refer to Japanese Patent Application Laid-Open No. 11-94433).

In this case, a cooler cover is provided to cover the cooler provided on the back surface of the freezer compartment, and air is blown from a fan provided on the cooler cover into the storage room through a damper device arranged in the discharge air passage. Then, the damper device is incorporated into the heat insulating box as a damper unit together with a heat insulating material forming a part of the discharge air passage.

However, in the above-mentioned conventional structure, the damper unit is incorporated into the heat insulating box after filling and foaming the foam heat insulating material, so the airtightness around the damper unit is lowered, or a sealing member is required to prevent the lowering. The main reason for rising costs. In addition, since the damper unit needs to be incorporated in the production process, an operator has to assemble it in an unreasonable posture, which is a factor that reduces productivity.

Utility model content

The utility model provides a refrigerator capable of improving cost reduction and productivity.

The refrigerator of the present utility model comprises: a heat-insulating box body having an inner box, an outer box, and a foaming heat insulating material filled between the inner box and the outer box; a cooler generating cold air; the cold air generated by the cooler A fan for forced circulation; and a cooling chamber to accommodate the cooler and fan. The refrigerator of the present utility model also includes: a low-temperature storage room, the cooling room is arranged on the back of the low-temperature storage room; a high-temperature storage room whose temperature is set higher than that of the low-temperature storage room; a partition wall; and a damper device for controlling the flow of the cold air in the air passage for delivering the cold air from the cooling room to the high-temperature storage room. In addition, in the refrigerator of the present invention, the damper device is attached to the heat-insulating partition wall, and the foamed heat-insulating material is filled in the heat-insulating partition wall.

Description of drawings

Fig. 1 is a longitudinal sectional view of a refrigerator according to a first embodiment of the present invention.

Fig. 2 is a longitudinal sectional view of the cooling chamber of the refrigerator according to the first embodiment of the present invention.

Fig. 3 is a front air flow diagram of the cooling room of the refrigerator according to the first embodiment of the present invention.

Fig. 4 is a detailed longitudinal sectional view of the cooling chamber of the refrigerator according to the first embodiment of the present invention.

Fig. 5 is a schematic longitudinal sectional view of a refrigerator according to a second embodiment of the present invention.

Fig. 6 is a schematic longitudinal sectional view of a refrigerator according to a second embodiment of the present invention.

Fig. 7 is a front view of the refrigerator compartment duct arranged on the back of the refrigerator compartment in the refrigerator according to the second embodiment of the present invention.

Fig. 8 is a schematic perspective view showing a cold air discharge air path to a switching room of the refrigerator according to the second embodiment of the present invention.

9 is a schematic cross-sectional view showing a switching room and a cold air discharge air duct of the refrigerator according to the second embodiment of the present invention.

Fig. 10 is an exploded structural view of a switching room of the refrigerator and a heat insulating partition wall of the freezing room according to the second embodiment of the present invention.

Fig. 11 is a schematic cross-sectional view showing a cold air intake air duct around a cooler in the refrigerator according to the second embodiment of the present invention.

Fig. 12 is a schematic front view showing a cold air intake air duct around the cooler of the refrigerator according to the second embodiment of the present invention.

Fig. 13 is a schematic front view showing a cold air intake air path from a cooler and a refrigerator compartment of the refrigerator according to the second embodiment of the present invention.

Fig. 14 is a schematic side view showing a cooler of the refrigerator according to the second embodiment of the present invention and a cold air intake air path from the refrigerator compartment.

detailed description

Hereinafter, although embodiment of this invention is described with reference to drawings, the same code|symbol is attached|subjected to the same structure as embodiment demonstrated above, and the detailed description is abbreviate|omitted. In addition, this invention is not limited by this embodiment.

(first embodiment)

Fig. 1 is a longitudinal sectional view of a refrigerator according to a first embodiment of the present invention. Fig. 2 is a longitudinal sectional view of the cooling chamber in the first embodiment of the present invention. Fig. 3 is a front air flow diagram of the cooling room of the refrigerator according to the first embodiment of the present invention. Fig. 4 is a detailed longitudinal sectional view of the cooling chamber of the refrigerator according to the first embodiment of the present invention.

1 to 4, the heat insulation box 31 of the refrigerator 30 includes: an outer box 32 mainly made of steel plates and an inner box 33 formed of resin such as ABS, and the inside of the heat insulation box 31 is filled with a The thermal insulating foam material 34, such as rigid polyurethane foam, is used to insulate the surroundings, and is divided into a plurality of storage chambers.

Among the plurality of storage rooms of refrigerator 30 , refrigerating room 35 is arranged at the uppermost part, switching room 36 is arranged at the lowermost part, and freezing room 37 is arranged between refrigerating room 35 and switching room 36 .

The front opening of the refrigerator compartment 35 is supported with a refrigerator compartment door 35a in a manner that the front opening can be opened and closed, and the front opening of the switching compartment 36 is supported with a switching compartment door 36a in a manner that the front opening can be opened and closed. Freezer compartment door 37a is supported by the front opening of 37 so that the front opening can be opened and closed.

The refrigerating chamber 35 is set at a temperature without freezing for refrigerated storage as the lower limit, and is usually set at 1° C. to 5° C., and the freezing chamber 37 is set at a freezing temperature range, and is usually set at -22° C. to -15° C. for cryopreservation. , but in order to improve the cryopreservation state, it is sometimes set at a low temperature of, for example, -30°C or -25°C. In addition, the switching chamber 36 can be set to -18-8 degreeC. In addition, the temperature switching of the switching chamber 36 is not limited to the above-mentioned, for example, -3-4 degreeC etc., The temperature fluctuation range can be set suitably according to a use.

In addition, switching chamber 36 and freezer chamber 37 are vertically partitioned by first partition wall 71 as a partition wall, and refrigerator chamber 35 and freezer chamber 37 are vertically partitioned by second partition wall 72 as a partition wall.

Next, the configuration of the cooling chamber will be described.

Cooling chamber 43 is thermally insulated from freezing chamber 37 by vertical partition walls 45a and 45b. A cooling chamber 43 for generating cold air is provided on the back of the freezer compartment 37, and a finned tube type cooler 44 made of aluminum or copper is typically arranged inside to generate cold air.

The cooler 44 includes a refrigerant tube 201 through which a refrigerant flows, and a plurality of plate fins 202 arranged at predetermined intervals.

The refrigerant tube 201 is a tube body made of aluminum or aluminum alloy, with a straight tube part connected to a curved tube part, bent in a plurality of rows (left and right) and layers (up and down) to form a meander. The serpentine tube obtained in the shape of a curved tube forms one refrigerant flow path without using a connecting tube forming a curved tube portion. Furthermore, since the curved tube portion of the refrigerant tube 201 passes through the elongated hole 203 formed in the plate fin 202 , the straight tube portion of the refrigerant tube 201 is in close contact with the plate fin 202 .

The elongated hole 203 has a rectangular portion and an arc portion, and is formed in the shape of an elongated hole in which short sides on both sides of the rectangular portion are connected to the arc portions. In addition, a circular arc portion collar (not shown) obtained by forming a standing edge for being closely fixed to the straight pipe portion of the refrigerant tube 201 is provided on the arc portion, and an arc portion collar (not shown) is provided on both ends of the rectangular portion in the longitudinal direction. A rectangular portion collar (not shown) obtained by standing up substantially vertically. The cooler 44 is provided so that this rectangular part collar (not shown) may incline downward as it goes to the back of a refrigerator.

Above the cooler 44 , a blower 46 for forcibly sending the generated cool air is arranged, and below the cooler 44 , a defrosting heater 47 for defrosting frost and ice adhering to the cooler 44 is provided. Moreover, a drain pan 48 for receiving defrosting water generated during defrosting is formed in its lower part, and a drain pipe 49 penetrating from the deepest part of the drain pan 48 to the outside of the storehouse is formed, and a drain pipe 49 is formed outside the storeroom on its downstream side. There is an evaporation pan 50 .

Specifically, the defrosting heater 47 is a glass tube heater 59 made of glass. In particular, when the refrigerant is a hydrocarbon refrigerant gas, a double glass tube heater formed with a double glass tube is used as an explosion-proof measure. . Above the glass tube heater 59, a heater cover 60 covering the glass tube heater 59 is disposed, and the heater cover 60 is set to a size equal to or greater than the glass tube diameter and width, so that it will not be damaged by defrosting due to defrosting. The water droplets from the cooler 44 directly fall on the surface of the glass tube which has become high temperature due to defrosting, making a sizzling sound.

Here, isobutane, which is a flammable refrigerant with low global warming potential, is used as the refrigerant in the refrigeration cycle in recent years from the viewpoint of global environmental protection. This isobutane, which is a hydrocarbon, has a specific gravity approximately twice that of air at room temperature and atmospheric pressure (specific gravity 2.04, at a temperature of 300K). Thereby, compared with the prior art, it is possible to reduce the charge amount of the refrigerant, the cost is low, and the leakage amount when the flammable refrigerant leaks is small, and the safety can be further improved.

In this embodiment, isobutane is used as the refrigerant, and the maximum temperature of the glass tube surface which is the outer shell of the glass tube heater 59 at the time of defrosting is limited as an explosion-proof measure. Therefore, in order to lower the temperature of the surface of the glass tube, a double glass tube heater that forms a double glass tube is used. In addition, as a structure for lowering the temperature of the surface of the glass tube, it is also possible to wind a highly heat-radiating member (for example, an aluminum fin) around the surface of the glass tube. At this time, the outer dimensions of the glass tube heater 59 can be reduced by making the glass tube single.

In addition, as a structure to improve the efficiency at the time of defrosting, in addition to the glass tube heater 59, a tube heater closely attached to the cooler 44 may be used in combination. In this case, by direct heat transfer from the tube heater, the defrosting of the cooler 44 is efficiently performed, and the drain pan 48 and the fan attached to the periphery of the cooler 44 can be cooled by using the glass tube heater 59 . 46% of the frost melts, so it is possible to shorten the defrosting time, save energy and suppress the rise in the temperature inside the refrigerator during defrosting.

In addition, when the glass tube heater 59 and the tube heater are combined, the capacity of the glass tube heater 59 can be reduced by making the respective heater capacities appropriate. When the heater capacity is reduced, the temperature of the outer shell of the glass tube heater 59 at the time of defrosting can also be lowered, so red heat at the time of defrosting can also be suppressed.

The drain pan 48 constitutes a part of the bottom surface and the rear surface of the cooling chamber 43 . In order to collect the defrosting water into the drain pipe 49, the bottom surface has the lowest connecting portion with the drain pipe 49, and the connecting portion with the drain pipe 49 is farthest from the defrosting heater 47 (distance L in FIG. 2 ). The back side rises to a height exceeding the height at which the water storage capacity of the drain pan 48 can be ensured, and the angle formed by the bottom surface and the back side is composed of a gentle curved surface.

Next, the air passage structure will be described.

The vertical partition walls 45a and 45b are composed of a front partition wall 45a forming the outer shell of the freezing compartment 37 and a rear partition wall 45b forming the outer shell of the cooling chamber 43 . The space between the front partition wall 45a and the rear partition wall 45b is the distribution air path 51 for branching cold air into each storage room.

The front partition wall 45a has a freezer compartment outlet 52 on its upper side, and communicates the distribution air passage 51 with the freezer compartment 37 . There is a freezer suction duct 53 protruding toward the freezer compartment 37 on the lower side, and the returned cold air from the freezer compartment 37 is introduced into the cooling compartment 43 from an inlet 53 a provided on the front (end) surface of the freezer intake duct 53 .

The distribution air path 51 is connected to the switching chamber discharge air path (not shown) through the switching chamber damper (refer to the switching chamber damper 80 in FIG. 5 ) provided in the first partition wall 71, and communicates the distribution air path 51 and the switching chamber 36. . In addition, the refrigerator compartment discharge air duct 85 is connected to the refrigerator compartment discharge air duct 85 through the refrigerator compartment damper (refer to the refrigerator compartment damper 42 in FIG. 5 ) provided in the second partition wall 72 , and the distribution air duct 51 communicates with the refrigerator compartment 35 .

The rear partition wall 45b is provided with the fan 46 on the upper side, and has the rib 55 which partitions the freezing room suction air path 53 and the cooling room 43 on the lower side. The area surrounded by the freezer suction air passage 53 by the rib 55 and the drain pan 48 is the freezer suction inlet 56 , and the freezer suction air passage 53 communicates with the cooling chamber 43 .

In addition, the area of the freezer compartment suction port 56 is larger than the area of the inlet 53a. Also, in a longitudinal section passing through the center of drain pipe 49, distance L between defrosting heater 47 and drain pipe 49 is greater than height H of freezer compartment suction port 56 in the same longitudinal section (FIG. 2). In addition, the distance B between the back surface of the cooling compartment 43 and the defrosting heater 47 is also configured to be larger than the height H of the freezing compartment suction port 56 ( FIG. 2 ).

The bottom surface of the freezer compartment suction air duct 53 is formed by connecting a part of the drain pan 48 to the bottom surface of the cooling compartment 43 . The drain pan 48 has a shape that slopes downward from the lower end of the inlet 53 a to the drain pipe 49 through the lower end of the freezer compartment suction port 56 , and then gently turns upward to reach the back of the cooling compartment 43 .

Refrigerator compartment suction air duct 87 is arranged on the back surface of cooler 44 . The refrigerating room suction air path 87 communicates the refrigerating room 35 and the cooling room 43 through the second partition wall 72 , and flows cold air that has cooled the refrigerating room 35 . Refrigerator compartment intake air duct 87 has a refrigerator compartment intake port 88 communicating with cooling compartment 43 below.

In addition, on the back surface of the cooler 44, a switching room suction port 89 is provided together with the refrigerating room suction port 88. As shown in FIG. The switching chamber suction port 89 communicates with the switching chamber 36 via the switching chamber suction air passage 90 provided in the first partition wall 71 .

Furthermore, the refrigerating compartment suction air path 87 communicating with the refrigerating compartment suction port 88 and the switching room suction air path 90 communicating with the switching room suction port 89 are respectively constituted as independent suction air paths.

In addition, refrigerating compartment suction port 88 and switching compartment suction port 89 are provided near the lower end of cooler 44 and formed at positions higher than freezing compartment suction port 56 .

In addition, the upper ends of the refrigerator compartment suction port 88 and the switching compartment suction port 89 are arranged above the lower end of the cooler 44 .

In addition, the width dimension of a plurality of high-temperature suction ports matched with the refrigerator compartment suction port 88 and the switch compartment suction port 89 provided at the same time is arranged to be substantially the same as the width dimension of the cooler 44 .

In addition, the opening area of refrigerating compartment suction port 88 in a temperature range higher than that of the switching compartment is set larger than the opening area of switching compartment suction port 89 .

In addition, switching compartment suction port 89 is disposed at a side end farther in the width direction from a connection portion between refrigerating compartment suction air passage 87 corresponding to refrigerating compartment suction port 88 and refrigerating compartment 35 .

In addition, the switching compartment suction port 89 and the refrigerating compartment suction port 88 provided at the same time may be arranged together so as to overlap in the horizontal direction and the vertical direction.

Hereinafter, the operation|movement and effect|action of the refrigerator comprised as mentioned above are demonstrated.

First, the cooling operation will be described.

Part of the cold air generated by cooler 44 of cooling chamber 43 is forcibly blown forward in distribution air passage 51 by fan 46 . The freezer compartment 37 is cooled by the cold air discharged from the freezer compartment discharge port 52, and the cold air passes through the freezer compartment suction air path 53 arranged at the bottom of the vertical partition wall 45, and is guided to the bottom of the cooler 44 from the freezer compartment suction port 56, and then flows through the cooler 44. The heat exchange is carried out in the middle, and the fresh cold air is circulated repeatedly through the blower fan 46 again. Thereby, freezer compartment 37 is cooled to an appropriate temperature by control of a freezer compartment sensor (not shown).

In addition, the cold air discharged to the upper side of the distribution air passage 51 is discharged to the refrigerator compartment 35 through the refrigerator compartment discharge air passage 85 in the second partition wall 72 . Moreover, regarding the direction to the switching chamber 36 , the cool air discharged into the distribution air passage 51 circulates in the first partition wall 71 and flows into the switching chamber 36 . The cool air circulating in the refrigerator compartment 35 and the switching compartment 36 becomes air with moisture contained in the air or stored items, and is guided from the refrigerator compartment 35 to the cooler 44 through the refrigerator compartment suction air duct 87 from the refrigerator compartment suction port 88 . The lower part of the hood exchanges heat with the cooler 44, and the fresh cold air is forcibly blown by the fan again. Similarly, from the switching chamber 36 through the switching chamber suction air passage 90, is guided from the switching chamber suction port 89 to the lower part of the cooler 44, exchanges heat with the cooler 44, and uses the fan again to forcefully blow fresh cold air.

Thereby, even if refrigerating room 35 and switching room 36 are located away from cooler 44 , cool air can be forcibly circulated by fan 46 to cool the room to a set temperature.

Here, a switching room damper (see switching room damper 80 in FIG. 5 ) for adjusting the amount of cold air is provided in the air passage of the switching chamber discharge air passage 86 for introducing cool air into the switching chamber 36 . As a result, the temperature in the switching chamber 36 can be finely controlled by using the switching chamber damper (refer to the switching chamber damper 80 in FIG. 5 ), so even in summer or during excessive door opening and closing during food storage after shopping, it is possible to Suppresses temperature fluctuations in the chamber and maintains the chamber at an appropriate temperature.

In addition, the switching chamber 36 can basically be set to -18 to 8°C, but the switching of the temperature range of the switching chamber 36 is not limited to this, and the temperature fluctuation range can be appropriately set to, for example, -3 to 4°C according to the application. Both convenience and energy saving.

In addition, the defrosting heater 47 can heat the inside of the cooling chamber 43, the inside of the refrigerating chamber suction air passage 87, and the inside of the switching chamber suction air passage 90 by using the heat of the heater during defrosting, so that condensation and freezing can be improved or prevented. , can improve the reliability.

Here, the details of the suction air path structure will be described.

When the cold air discharged from the fan 46 circulates in all the storage rooms of the refrigerating room 35, the switching room 36, and the freezing room 37, three of the return air from the freezing room 37 and the high-temperature returning air from the refrigerating room 35 and the switching room 36 The air flow flows into the cooling chamber 43 at the same time.

That is, the return cold air from the freezer compartment 37 passes through the freezer compartment intake air path 53 from the inlet 53 a, and enters the cooling compartment 43 from the freezer compartment intake port 56 . In addition, the high-temperature returned cold air from the refrigerator compartment 35 enters the cooling chamber 43 through the refrigerator compartment intake air passage 87 through the refrigerator compartment intake port 88 . In addition, the high-temperature returned cold air from the switching chamber 36 passes through the switching chamber suction air passage 90 and enters the cooling chamber 43 from the switching chamber suction port 89 .

In this embodiment, the freezer compartment suction port 56 is located on the front surface of the cooling compartment 43, and the refrigerator compartment suction port 88 is located on the back side of the cooling compartment 43. The freezer compartment suction port 56 is located below the refrigerator compartment suction port 88, and the freezer compartment suction The port 56 is located below the inlet 53a. Accordingly, the cold air returned to the freezer compartment flows down into the cooling compartment 43 along the drain pan 48 constituting the bottom surface of the freezer compartment intake air passage 53 . In addition, a defrosting heater 47 for melting frost or ice is arranged above the drain pan 48, and the distance L between the defrosting heater 47 and the drain pan 48 and the distance B from the back side of the cooling chamber 43 are greater than that of the freezing chamber suction port. The height H of 56 is large. Therefore, the cold air returned from the freezing room tends to flow into the larger defrosting heater 47 below the space, then flows on the bottom surface of the cooling room 43 in this state, and changes direction according to the shape of the drain pan 48. Even when flowing upward, the pressure loss can be suppressed to be small.

As a result, the cold air returning to the freezer at a high speed backward and the cold air returning high temperature at a high speed forward are vertically shifted, so that mutual interference can be suppressed and the air volume circulating in the refrigerator can be increased. Therefore, cooling capacity can be further improved. In addition, when the cold air only circulates in the freezer compartment 37 that needs to be cooled most, the freezer suction port 56 is located further below, and the distance for the return cold air from the freezer to pass through the cooler 44 becomes longer to increase the amount of heat exchange, thereby further improving the cooling effect. Increased cooling capacity.

The above-mentioned returning cold air from the freezing chamber and the high-temperature returning cold air flowing out from the refrigerating chamber suction port 88 and the switching chamber suction port 89 arranged on the back side of the cooling chamber 43 merge at the back side of the cooling chamber 43, but the high-temperature returning cold air can push upward freezing. The room return cold air is smoothly turned upward, and rushes into the cooler 44 together with the freezer return cold air. Therefore, the two airflows of the cold air returning from the freezer and the cold air returning at high temperature do not collide head-on and interfere with each other, so the air volume of the two airflows is increased, thereby increasing the heat exchange amount of the cooler 44 and improving the cooling capacity.

Moreover, the shape of the drain pan 48 which comprises the bottom surface of the cooling chamber 43 has the shape which inclines downward from the freezer compartment suction port 56 to the drain pipe 49. As shown in FIG. As a result, the cold air returning to the freezer can rise along the drain pan 48 and along the rear surface that flows downward. Therefore, in front of the high-temperature suction port 58, the speed of returning cold air from the freezing chamber is increased, and can smoothly merge with the high-temperature returning cold air, thereby further increasing the air volume and improving the cooling capacity.

In addition, freezer compartment suction port 56 is provided with freezer compartment suction duct 53 on the upstream side, and inlet 53 a of freezer compartment suction duct 53 is located above freezer compartment suction port 56 . As a result, the freezer return cold air at the freezer compartment suction port 56 flows downward into the cooling chamber 43, so it is easier to flow along the drain pan 48, and the interference with the low temperature return cold air can be suppressed while further reducing the pressure loss. In addition, since the area of the inlet 53a of the freezer compartment suction air duct 53 is smaller than the area of the freezer compartment suction port 56, the pressure loss at the freezer compartment suction port 56 can be further reduced.

In addition, the high-temperature suction port on the back side of the cooler, which is an inflow portion of return cold air from refrigerating room 35 and switching room 36, is arranged so as to be approximately the same as the width dimension of the cooler. As a result, among the returned cold air circulating in the refrigerator, the refrigerator room returned cold air and the switching room returned cold air having a large temperature difference with the cooler 44 exchange heat with the cooler 44 at approximately the same size as the width of the cooler. The heat exchange area of the cooler 44 can be increased, and the efficiency of the refrigeration cycle can be improved, thereby realizing energy saving.

In addition, in the usage state of the refrigerator, the number of times of opening and closing of the doors of the refrigerator compartment 35 and the switching compartment 36 is large. Especially in recent years, plastic bottles other than vegetables are cooled and stored in the switching room 36. In one day, the number of times of door opening and closing of the cooling room 35 or the switching room 36 is on the rise compared with 10 years ago. Therefore, as mentioned above, the amount of heat exchange between the high-temperature return cold air circulating in the high-temperature storage room of the refrigerating room 35 or the switching room 36 and the cooler becomes larger, and the time in the cooling room can be reduced, so it can also be reduced by shortening the cooling operation time. The amount of frost on the cooler 44. Especially because the door opening and closing times of the high-temperature storage room are many, not only the moisture of the outside air is easy to invade, but also the temperature is high, so the absolute humidity kept in the air is also high, so the amount of frost attached to the cooler 44 also becomes smaller. many. By reducing the amount of frost deposited on the cooler 44, the defrosting cycle of the cooler 44 can be extended, and the number of times of power input to the defrosting heater 47 can be reduced, and the cooling required for the interior of the refrigerator after the temperature inside the refrigerator has risen due to defrosting can be achieved. The power input to the chiller 44 is reduced for further energy savings.

In addition, since the larger heat exchange area of the cooler 44 can be obtained, it means that the area where the cooler 44 is frosted is increased, so that the deterioration of the cooling capacity during frosting can also be suppressed. As a result, the time required for defrosting after the operation of the refrigerator can be extended (defrosting cycle), and the number of times of power supply input to the defrosting heater 47 can be reduced and the cooling required for the interior of the refrigerator after the temperature inside the refrigerator has risen due to defrosting can be achieved. The power input to the chiller 44 is reduced for further energy savings.

In addition, the refrigerator compartment suction upper end 88a and the switching room suction upper end 89a, which are both suction ports provided on the back of the cooling chamber 43, are located above the cooler lower end 44b, which is the lower end of the cooler 44.

Thereby, in cooling room 43 , the return cold air from refrigerating room 35 and switching room 36 flows above the freezing room returning cold air from freezing room 37 . Therefore, the cold air returned to the freezer with a high speed backward and the cold air returned from the refrigerating chamber 35 and the switching chamber 36 with a high speed forward are staggered in the vertical direction, and mutual interference can be suppressed and the air volume circulating in the storage can be increased. Therefore, the cooling capacity can be further improved.

Frost adheres to the cooler 44 due to moisture in the air entering when the door is opened and closed, moisture attached to food put into the refrigerator, and moisture from vegetables stored in the refrigerator. When the growth of the frost is completed, the heat exchange efficiency between the cooler 44 and the circulating cold air is reduced, and the inside of the refrigerator cannot be sufficiently cooled, and eventually it becomes a state of no cooling or slow cooling. Therefore, in the refrigerator, it is necessary to periodically defrost the frost adhering to cooler 44 . On the other hand, in this embodiment, cooler lower end 44b is disposed between refrigerating compartment suction inlet upper end 88a and switching compartment suction inlet upper end 89a, and between refrigerating compartment suction inlet lower end 88b and switching compartment suction inlet lower end 89b. As a result, even if the frost attached to the lower back of the cooler grows due to the high-temperature return cold air with a large moisture content, the high-temperature return cold air flows toward the bottom side of the cooler, thereby improving the anti-frost performance. Thereby, deterioration of the cooling capacity at the time of frost formation can also be suppressed.

Also, when the refrigerator compartment suction inlet upper end 88a and the switching chamber suction inlet upper end 89a are positioned below the cooler 44, the air passage resistance of the refrigerator compartment suction air passage 87 increases and the circulating air volume decreases, so the cooling capacity decreases. On the other hand, when the upper end 88a of the suction inlet of the refrigerating chamber and the upper end 89a of the suction inlet of the switching chamber are set above the cooler 44, the air path resistance is reduced and the circulating air volume is increased. frost, the refrigerating chamber suction air duct 87 may be blocked. Therefore, as in the present embodiment, by disposing the cooler lower end 44b between the upper end 88a of the suction inlet of the refrigerating chamber and the upper end 89a of the suction inlet of the switching chamber, and the lower end 88b of the suction inlet of the refrigerating chamber and the lower end 89b of the suction inlet of the switching chamber, the cooling capacity and frosting can be satisfied. Endurance both. In particular, between the lowermost pipe of the cooler 44 and the lowermost upper pipe, the upper end 88a of the suction inlet of the refrigerating chamber and the upper end 89a of the suction inlet of the switching chamber are arranged, whereby a balance between the cooling capacity and the frost resistance can be achieved. Achieve optimization.

Moreover, in the cooling chamber 43, the long hole 203 of the plate fin 202 and the collar (not shown) of a rectangular part are provided in the cooler 44 so that it may incline downward toward the back of a refrigerator. As a result, the merged cold air rushes in from the back side of the cooler 44 with a vertically upward component, and a part of the cold air that flows in flows along the plate fins 202 and the rectangular collar (not shown) of the cooler 44 . , is guided to the front surface of the cooler 44 . As a result, the cool air passes through the cooler 44 as a whole, thereby increasing the amount of heat exchange, so that the cooling capacity can be improved.

In addition, in this embodiment, the opening area of refrigerating compartment suction port 88 is set larger than the opening area of switching compartment suction port 89 . The temperature of the switching chamber 36 is different according to the vegetables stored, and there is an optimal storage temperature. For leafy vegetables, it is preferably divided into about 1-2°C for storage, and for fruit vegetables, it is preferably divided into about 8-9°C for storage. The temperature of refrigerating room 35 is set lower than switching room 36 . Therefore, by setting the opening area of the refrigerator compartment suction port 88 larger than that of the switching compartment suction port 89 as in the present embodiment, it is possible to ensure the air volume and circulation for cooling the refrigerator compartment to a temperature lower than the switching compartment temperature. Air conditioning.

In addition, switching chamber suction port 89 is disposed at a side end portion farther in the width direction from a connection portion between refrigerator compartment 35 and refrigerator compartment intake air passage 87 .

As a result, the cold return air from the refrigerating room corresponding to the refrigerating room 35 cooled to a temperature lower than that of the switching room circulates to the cooler 44 in the refrigerating room intake air passage 87 at a higher wind speed than the returning air from the switching room. Moreover, the air velocity of the connection part of refrigerating room 35 and refrigerating room suction air path 87, and the air path with short distance in the air path with cooler 44 is the fastest. In the present embodiment, switching room suction port 89 is arranged on the side of the air passage where the distance in the air passage is relatively long with respect to the connecting portion between refrigerating room 35 and refrigerating room suction air passage 87 . As a result, the return cold air flowing from the switching chamber 36 to the cooler 44 is less affected by the circulation wind speed of the return cold air from the refrigerator compartment flowing into the cooler 44 , so mutual interference such as backflow is suppressed, and heat exchange efficiency is ensured.

In addition, in the present embodiment, the switching compartment suction port 89 is arranged horizontally and vertically with respect to the refrigerating compartment suction port 88 .

As a result, the return cold air flowing into the back of the cooler can exchange heat over the entire width of the cooler, so the heat exchange efficiency is improved, and the refrigeration cycle efficiency is improved, so energy is saved. In addition, when forming the refrigerating compartment intake air duct 87 and the switching compartment intake air duct 90, the components are downsized, so the cost can be reduced. In particular, by integrally forming the refrigerating compartment suction air path 87, the refrigerating compartment suction port 88, the switching room suction air path 90, and the switching room suction port 89, it is possible to reduce the cost of materials and mold costs for production, and also reduce the man-hours in the manufacturing process. . In this embodiment, the refrigerated compartment intake duct 87, the refrigerated compartment intake 88, and the switching compartment intake 89 are made up of integral components. On the basis of reducing material costs and mold costs, the number of components is reduced and management costs are also reduced. Thereby, it is possible to reduce the cost of the product as a whole, bring about a reduction in the selling price, and realize an improvement in the sales rate.

In addition, since the switching compartment suction port 89 and the refrigerating compartment suction port 88 are disposed on the back side of the cooler 44, it is possible to reduce dead space, increase the storage volume, and improve convenience.

In addition, the refrigerator 30 most needs to cool the freezer compartment 37, which has a large temperature difference with the outside air temperature among the three storage compartments. Cold air circulates only in the freezer compartment 37 . Only when the cold air discharged from the fan 46 circulates in the freezer compartment 37, only the return cool air from the freezer compartment 37 flows into the cooling compartment 43.

At this time, the cold air returned from the freezer is also the same as when the cold air circulates in all storage compartments. It enters the cooling chamber 43 from the inlet 53a through the freezer suction air path 53, enters the cooling chamber 43 from the freezer suction port 56, and passes under the defrosting heater 47. , flush into the cooler 44 from the back along the drain pan 48 . Therefore, the cold air returned from the freezer compartment can flow diagonally in the cooler 44, and a longer heat exchange distance can be obtained, so the heat exchange amount can be increased, and the cooling capacity can be improved.

Moreover, since the suction port provided in the front surface of the cooling compartment 43 is only the freezer compartment suction port 56, the width of the freezer compartment suction port 56 can be extended to be equal to the width of the cooler 44. Therefore, even if cold air circulates only in the freezer compartment 37, the whole cooler 44 can be used, and cooling capacity can be further improved.

In addition, since the freezer compartment suction port is larger than the freezer compartment suction air path 53 inlet 53a, the pressure loss here can also be suppressed, and the air volume can be increased.

As described above, the cooling capacity can be improved regardless of cooling the entire refrigerator or cooling the freezer.

In addition, since low-temperature cooler 44 is generally disposed on the back of refrigerator 30, much heat enters through the heat insulating wall on the back. On the other hand, since the high-temperature suction air path is formed between the cooling chamber 43 and the heat insulating wall, the amount of heat entering through the heat insulating wall on the back side of the refrigerator 30 can be reduced.

In addition, the cool air cooled by the cooler 44 spreads to its periphery by heat transfer. In contrast, when returning cold air from the refrigerating chamber 35 or the switching chamber 36 flows through the refrigerating chamber suction air passage 87 and the switching chamber suction air passage 90 arranged on the back side of the cooler 44, the cold air leaking from the cooler 44 is absorbed, and the cold air leaked from the cooler 44 is absorbed again. Since it returns to cooling chamber 43, leakage of cold air to the outside of refrigerator 30 can be suppressed, and power consumption can be reduced.

(second embodiment)

Fig. 5 is a schematic longitudinal sectional view of a refrigerator according to a second embodiment of the present invention. Fig. 6 is a schematic longitudinal sectional view of a refrigerator according to a second embodiment of the present invention. Fig. 7 is a front view of the refrigerator compartment duct arranged on the back of the refrigerator compartment in the refrigerator according to the second embodiment of the present invention. Fig. 8 is a schematic perspective view showing a cold air discharge air path to a switching room of the refrigerator according to the second embodiment of the present invention. 9 is a schematic cross-sectional view showing a switching room and a cold air discharge air duct of the refrigerator according to the second embodiment of the present invention. Fig. 10 is an exploded structural view of a switching room of the refrigerator and a heat insulating partition wall of the freezing room according to the second embodiment of the present invention. Fig. 11 is a schematic cross-sectional view showing a cold air intake air duct around a cooler in the refrigerator according to the second embodiment of the present invention. Fig. 12 is a schematic front view showing a cold air intake air duct around the cooler of the refrigerator according to the second embodiment of the present invention. Fig. 13 is a schematic front view showing a cold air intake air path from a cooler and a refrigerator compartment of the refrigerator according to the second embodiment of the present invention. Fig. 14 is a schematic side view showing a cooler of the refrigerator according to the second embodiment of the present invention and a cold air intake air path from the refrigerator compartment.

In addition, the same code|symbol is attached|subjected to the same structure as 1st Embodiment, and detailed description is abbreviate|omitted. In addition, the technical idea of the first embodiment can also be applied to this embodiment.

In the figure, the refrigerator 30 has: a heat insulation box 31 formed by an outer box 32, an inner box 33, and a foam insulation material 34 filled between the outer box 32 and the inner box 33, and the inside is utilized by the first part. The partition wall 71 is separated from the second partition wall 72 . The uppermost part is provided with a refrigerating chamber 35, the lower part of the second partition wall 72 is provided with a freezing chamber 37, and the lowermost part below the first partition wall 71 is provided with a switching chamber 36 capable of switching from freezing to storage temperature of vegetables.

In addition, an ice-making compartment 38 and an upper freezer compartment (not shown) are provided together in the freezer compartment 37, and a lower freezer compartment 40 is provided below the freezer compartment.

In addition, a rotary refrigerating compartment door 35a is provided on the front surface of the refrigerating compartment 35, and pull-out switching compartment doors 36, ice making compartment 38, upper freezing compartment (not shown), and lower freezing compartment 40 are provided on the front surfaces of the switching compartment 36, respectively. Compartment door 36a, ice maker door 38a, upper freezer door (not shown), and lower freezer door 40a.

In addition, a chilled case (chilled case) 41 set at a temperature slightly lower than that of the refrigerator compartment is installed in the lower part of the refrigerator compartment 35, and can be drawn back and forth.

The refrigerating room duct cover 81 arranged on the back side of the refrigerating room 35 forms a refrigerating room discharge air passage 85 at the rear, has a plurality of discharge ports 82 on the upper side, and has a refrigerating room suction inlet part communicating with the refrigerating room suction air passage 87 below. 83.

The refrigerator compartment suction inlet 83 is arranged on the back side of the ice temperature preservation box 41, and the cold air discharged into the refrigerator compartment 35 cools the inside, flows through the gap formed between the ice temperature preservation box 41 and the second partition wall 72, and flows from the refrigerator compartment. The compartment suction inlet portion 83 returns to the cooling compartment 43 through the refrigerating compartment intake air path 87 .

In addition, the ice-warm crisper 41 is cooled to a temperature about 0 to 3° C. lower than that of the refrigerator compartment 35, and the ice-warm crisper for returning the cold air from the ice-warm crisper 41 to the cooling chamber 43 is sucked into the inlet portion 84 and the refrigerator compartment. The suction inlet portion 83 is arranged on the back side of the ice-warm fresh-keeping box 41 together.

In addition, the cold air from the cooling chamber 43 to the switching chamber 36 flows from the distribution air passage 51 through the switching chamber damper 80 provided in the first partition wall 71 to the switching chamber discharge air passage (not shown) and flows into the switching chamber 36. .

Here, the switching chamber damper device 92 having the switching chamber damper 80 inside includes: a switching chamber damper front plate 93 a switching chamber damper rear plate 94, a heat insulating material 95 arranged between them (for example, foam heat insulation Material 34), the switching chamber damper 80 is inserted in the space (air path) provided inside the heat insulating material 95 (for example, the foam heat insulating material 34).

Moreover, in the state where the switch chamber damper device 92 is pre-installed on the first partition wall 71, the first partition wall 71 is put into the heat insulation box 31, and when the heat insulation box 31 is filled with the foam heat insulating material 34, It is also filled up to the first partition wall 71 at the same time.

In addition, the downstream side of the switching chamber damper 80 provided in the switching chamber damper device 92 is branched into a plurality, and cold air is sent to the switching chamber 36 from the plurality of switching chamber outlets 96a, 96b. Switching chamber discharge port 96 a is arranged to discharge cool air from above switching chamber 36 into switching chamber case 97 . The switch chamber discharge port 96b is arranged so as to discharge cool air from the rear of the switch chamber 36 into the switch chamber case lower 98 . Thereby, the temperature unevenness in the switching chamber 36 can be reduced, and can maintain a predetermined temperature distribution.

In addition, the first partition wall 71 is placed between the first partition wall upper plate 73 and the first partition wall lower plate 74 with the heat insulating material 75 corresponding to the drain pan 48 and the switch chamber return duct cover 76 installed in advance. The first partition wall 71 is installed in the heat insulation box 31 , and when the heat insulation box 31 is filled with the foamed heat insulating material 34 , it is also filled to the first partition wall 71 at the same time.

And, the cold air returning from the switch chamber 36 to the cooling chamber 43 passes through the space formed between the switch chamber return duct cover 76 and the first partition wall lower plate 74 , and the heat insulating material 75 corresponding to the drain pan 48 and the first partition wall. The space (between the heat insulating material 75 , the first partition wall lower plate 74 and the first partition wall upper plate 73 ) formed on the back side of the partition wall 71 returns to the cooling chamber 43 .

That is, the cold air returning from the switch chamber 36 to the cooling chamber 43 returns to the duct cover 76 from the switch chamber arranged on the top surface of the switch chamber 36 , passes through the bottom and rear of the drain pan 48 , and passes through the switch chamber on the back side of the cooling chamber 43 . The suction port 89 returns to the cooler 44 (see FIG. 11 ).

In addition, the refrigerator compartment suction inlet 88 provided on the back surface of the cooling compartment 43 that returns to the cooling compartment 43 from the refrigerator compartment 35 through the refrigerator compartment intake air duct 87 is arranged corresponding to the substantially entire width of the cooler 44 , and is drawn from the switch compartment 36 . A stepped portion is provided in a portion of the cooling chamber 43 adjacent to the switching chamber suction port 89 , and the switching chamber suction port 89 is provided together with the lower portion of the stepped portion.

In addition, as shown in FIG. 13 , the refrigerated compartment intake air duct 87 is constituted by a plate-shaped cover formed between the cooler 44 and the inner box 33 of the heat insulating box 31 by other components, and connects the upper part to the refrigerated compartment connecting portion 91. Connect, and use the lower part as the refrigerator compartment suction inlet 88.

Furthermore, the width dimension of refrigerator compartment connection portion 91 is set narrower than the width dimension of refrigerator compartment suction port 88 , and the depth dimension of refrigerator compartment connection portion 91 is set wider than the depth dimension of refrigerator compartment suction port 88 .

Moreover, in the left-right direction of the back surface of the cooling room 43, the refrigerating room connection part 91 and the switching room suction port 89 arrange|positioned adjacent to the refrigerating room suction port 88 are arrange|positioned facing each other.

The operation and effect of the above configuration will be described below.

The switching chamber damper device 92 having the switching chamber damper 80 inside comprises: a switching chamber damper front panel 93 a switching chamber damper rear panel 94, an insulating material (for example, a foaming insulating material 34) arranged between them, A switching chamber damper 80 is inserted into a space (air passage) provided inside the heat insulating material (for example, the foam heat insulating material 34 ). Moreover, in the state where the switch chamber damper device 92 is pre-installed on the first partition wall 71, the first partition wall 71 is put into the heat insulation box 31, and when the heat insulation box 31 is filled with the foam heat insulating material 34, It is also filled up to the first partition wall 71 at the same time. Thereby, the damper device can be arrange|positioned in advance in a heat insulating partition wall, and the assembly workability|operativity of a refrigerator can be improved. Therefore, the switching chamber damper device 92 can be reliably arranged at a predetermined position without unnecessary manipulation in the assembly process.

In addition, the downstream side of the switching chamber damper 80 provided in the switching chamber damper device 92 is branched into a plurality, and cold air is sent to the switching chamber 36 from the plurality of switching chamber outlets 96a, 96b. Switching chamber discharge port 96 a is arranged to discharge cool air from above switching chamber 36 into switching chamber case 97 . The switch chamber discharge port 96b is arranged so as to discharge cool air from the rear of the switch chamber 36 into the switch chamber case lower 98 . Thereby, the temperature unevenness in the switching chamber 36 can be reduced, and can maintain a predetermined temperature distribution.

In addition, the cool air returning from the switch chamber 36 to the cooling chamber 43 passes through the space formed between the switch chamber return duct cover 76 and the first partition wall lower plate 74, and the heat insulating material 75 corresponding to the drain pan 48 and the second partition wall. A space formed on the back side of a partition wall 71 returns to the cooling chamber 43 . That is, the returned cold air returns to the duct cover 76 from the switching chamber arranged on the top surface of the switching chamber 36 , passes through the bottom and rear of the drain pan 48 , and returns to the cooler 44 from the switching chamber suction port 89 on the back of the cooling chamber 43 . Accordingly, the entire width of the front surface of cooling chamber 43 is used as a suction port for return cold air of freezing chamber 37, and the cooling capacity of freezing chamber 37 can be improved.

In addition, the refrigerator compartment suction inlet 88 provided on the back surface of the cooling compartment 43 that returns to the cooling compartment 43 from the refrigerator compartment 35 through the refrigerator compartment intake air duct 87 is arranged corresponding to the substantially entire width of the cooler 44 , and is drawn from the switch compartment 36 . A stepped portion is provided in a portion of the cooling chamber 43 adjacent to the switching chamber suction port 89 , and the switching chamber suction port 89 is provided together with the lower portion of the stepped portion. Thereby, return cold air from refrigerating room 35 can be efficiently returned to cooler 44, and return cold air from switch chamber 36 can also be efficiently returned to cooler 44. FIG.

In addition, a refrigerating room suction inlet 83 is provided under the refrigerating room duct cover 81 on the back side of the refrigerating room 35 and on the back side of the ice-warm fresh-keeping box 41, so the refrigerating room suction inlet 83 is hidden in the ice-warm fresh-keeping box 41. design can be improved. Moreover, the design freedom of the refrigerator compartment suction inlet part 83 can be improved, and also the design property of the refrigerator compartment duct cover 81 whole can be improved.

In addition, the ice-warm crisper 41 is cooled to a temperature about 0 to 3° C. lower than that of the refrigerator compartment 35, and the ice-warm crisper for returning the cold air from the ice-warm crisper 41 to the cooling chamber 43 is sucked into the inlet portion 84 and the refrigerator compartment. The suction inlet portion 83 is arranged on the back side of the ice-warm fresh-keeping box 41 together. Thereby, the cold crisper suction inlet part 84 is also hidden in the back surface of the cold crisper 41, and the improvement of design including the cold crisper suction inlet part 84 can be aimed at. Thereby, the design property of the whole interior of the refrigerator compartment 35 can be improved.

As explained above, the refrigerator of the present invention includes: a heat insulation box having an inner box, an outer box, and a foam insulation material filled between the inner box and the outer box; a cooler for generating cold air; A fan for forcibly circulating cool air generated by the cooler; and a cooling room for storing the cooler and the fan. The refrigerator of the utility model also includes: a low-temperature storage room, the cooling room is arranged on the back of the low-temperature storage room; a high-temperature storage room whose temperature is set higher than that of the low-temperature storage room; a partition wall; and a damper device for controlling the flow of the cold air in the air passage for delivering the cold air from the cooling room to the high-temperature storage room. In addition, in the refrigerator of the present invention, the damper device is attached to the heat-insulating partition wall, and the heat-insulating foam material is filled in the heat-insulating partition wall.

In this way, the present invention can reliably arrange the damper device at a predetermined position with a simple structure.

In addition, in the state where the damper device is pre-installed on the heat insulation partition wall, the utility model puts the heat insulation partition wall into the heat insulation box, and fills the foam heat insulation material in the heat insulation box body and the heat insulation partition wall. .

According to this structure, the damper device can be arrange|positioned in advance in a heat insulating partition wall, and the assembly workability|operativity of a refrigerator can be improved.

In addition, in the present invention, the downstream side of the damper device provided in the air path that sends cold air from the cooling room to the high-temperature storage room is divided into multiple branches, and the cold air is sent to the high-temperature storage room from a plurality of outlets.

According to this configuration, it is possible to reduce the temperature unevenness in the high-temperature storage room and maintain a predetermined temperature distribution while ensuring the positioning of the damper device.

Industrial availability

As described above, the structure of the refrigerator of the present invention does not increase the pressure loss of the air passage, and can increase the heat exchange amount of the cooler, so it can be applied to household or industrial refrigerators, etc., to force the air to circulate. Cooling equipment for heat exchange.

Symbol Description

30 cold storage

31 Insulation box

32 Outer boxes

33 inner box

34 foam insulation

35 Refrigerator (the first high-temperature storage room)

35a Refrigerator door

36 Switching room (second high temperature storage room)

36a Switch chamber door

37 freezer (low temperature storage room)

37a Freezer door

38 ice room

38a Ice maker door

40 Lower Freezer

40a Lower freezer door

41 Ice temperature crisper (storage box)

42 Refrigerator door

43 cooling room

44 cooler

44b cooler lower end

45a, 45b Vertical partition wall

46 fans

47 Defrost heater

48 Drain pan (bottom of cooling chamber)

49 drain pipe

50 evaporator

53 Freezer suction air duct

53a entrance

56 Freezer suction port (low temperature suction port)

59 glass tube heater

60 heater cover

71 First partition wall

72 Second partition wall

73 First partition wall upper plate

74 First partition wall lower plate

75 insulation

76 Switching chamber return duct cover

80 Switch chamber damper

81 Refrigerator Duct Cover

82 outlet

83 Refrigerator suction inlet

84 Ice-temperature crisper suction inlet

85 Refrigerator exhaust air duct

87 Refrigerator suction air path (high temperature suction air path)

88 Refrigerator compartment suction port (1st high temperature suction port)

88a The upper end of the suction inlet of the refrigerator compartment (the upper end of the first high-temperature suction inlet)

89 Switching chamber suction port (2nd high temperature suction port)

89a The upper end of the suction port of the switching chamber (the upper end of the second high temperature suction port)

90 Switching room suction air path (high temperature suction air path)

91 Refrigerator connection (1st high-temperature storage connection)

92 Switching chamber damper device

93 Switching chamber damper front plate

94 Switching chamber damper rear plate

96a, 96b Switch chamber outlet

97 switch chamber box

98 switch chamber box down

201 Refrigerant pipe

202 plate fin

203 Slotted hole.

Claims (3)

1. A refrigerator, characterized in that, comprising: a heat insulation box body having an inner box, an outer box, and a foam insulation material filled between the inner box and the outer box; coolers generating cold air; a fan for forcibly circulating the cold air generated by the cooler; a cooling chamber for accommodating the cooler and the fan; A low-temperature storage room, the cooling room is arranged on the back of the low-temperature storage room; a high-temperature storage room whose temperature is set higher than that of the low-temperature storage room; an insulating partition wall dividing the low-temperature storage room and the high-temperature storage room; and a damper device for controlling the flow rate of cold air in the air path that sends cold air from the cooling room to the high-temperature storage room, The damper device is installed on the heat insulation partition wall, and the foam heat insulation material is filled in the heat insulation partition wall. 2. The refrigerator according to claim 1, characterized in that: In the state where the damper device is pre-installed on the heat insulation partition wall, the heat insulation partition wall is put into the heat insulation box, and the foam heat insulation material is filled in the heat insulation box and the insulating partition wall. 3. The refrigerator according to claim 1 or 2, characterized in that: The downstream side of the damper device provided in the air passage for feeding cold air from the cooling chamber to the high-temperature storage room is branched into a plurality, and the cold air is sent to the high-temperature storage room from a plurality of outlets.