JP6815540B2 - refrigerator - Google Patents

Description

The present invention relates to a refrigerator.

In the refrigerator, the air cooled in the cooling chamber is sent to a storage chamber such as a refrigerator or a freezer, and then returned to the cooling chamber to be cooled. The air circulating in the refrigerator in this way contains water vapor. Therefore, dew condensation occurs on the surface of the cooler provided in the cooling chamber, and frost is generated. When the frost generated on the surface of the cooler grows, the function of the cooler deteriorates. Therefore, a heater for defrosting is provided in the cooling chamber to periodically melt the frost attached to the cooler.

In order to prevent water from getting wet in the storage chamber, it is necessary to prevent the water melted by operating the defrosting heater from entering the storage chamber through the air passage. In the refrigerator disclosed in Patent Document 1, a roof is provided at the connection portion between the cooling chamber provided with the cooler and the air passage connected to the cooling chamber to prevent the melted water from entering the air passage. ..

Japanese Unexamined Patent Publication No. 5-280853

The roof provided in the refrigerator disclosed in Patent Document 1 is provided at a position that blocks the progress of air through the air passage toward the cooling chamber. Therefore, there is a problem that the pressure loss of the air circulating in the refrigerator is large and the input power amount of the blower for circulating the air is large.

The present invention has been made to solve the above-mentioned problems, and it is possible to prevent the ingress of water into the storage chamber through the air passage while suppressing the occurrence of pressure loss of the circulating air. The purpose is to provide a refrigerator.

In order to achieve the above object, the refrigerator according to the present invention connects a storage chamber for storing storage, a cooling chamber for cooling the internal air, and the storage chamber and the cooling chamber to form an internal air passage path. It is provided with a housing in which a circulation path is formed and a drainage channel for draining water in the cooling chamber is formed. In addition, the refrigerator is housed in a cooling chamber and has a cooler that cools the surrounding air, a warmer that heats the cooler to melt the ice adhering to the cooler, and cold air cooled by the cooler. Is sent to the storage chamber through the circulation path, and the air in the storage chamber is returned to the cooling chamber through the circulation path to circulate the internal air. Of the circulation channels, the return air passage that sends the air in the storage chamber to the cooling chamber extends diagonally from below and connects to the side surface of the cooling chamber. A groove is formed on the wall surface of the return air passage to receive water that has entered the return air passage from the wall surface of the cooling chamber .

According to the present invention, since the groove portion for receiving the water transmitted to the wall surface of the circulation path is formed, the invasion of water into the storage chamber through the air passage is prevented while suppressing the occurrence of pressure loss of the circulating air. Can provide a refrigerator that can.

Front view of the refrigerator according to the first embodiment of the present invention Sectional view of the refrigerator cut along line II-II in FIG. Enlarged view of the part indicated by "III" in FIG. Sectional view of the refrigerator cut by the IV-IV line in FIG. Perspective view of the first wall body arranged in front of the wall bodies defining the return air passage. Rear view of the first wall as seen from the arrow VI in FIG. It is an enlarged view of the inside of the refrigerator focusing on the cooling chamber and the return air passage, and is a diagram for explaining the flow of water and the flow of air passing through the return air passage. An enlarged view of the inside of the refrigerator according to the second embodiment of the present invention. Rear view of the first wall of the refrigerator according to the third embodiment of the present invention. Rear view of the first wall of the refrigerator according to the fourth embodiment of the present invention.

Hereinafter, the refrigerator according to the preferred embodiment of the present invention will be described with reference to the drawings. In addition, in the following plurality of embodiments, the same reference numerals are given to the same configurations. Further, in the following description, in order to facilitate understanding of the invention, the front direction of FIG. 1 is the front side of the refrigerator, the back direction is the rear side of the refrigerator, and the vertical and horizontal directions when the refrigerator is viewed from the front are the same as the refrigerator This will be described as the vertical and horizontal directions.

(Embodiment 1)
FIG. 1 is a front view of the refrigerator 100 according to the first embodiment of the present invention. The refrigerator 100 has a box-shaped heat insulating box 110 divided into a plurality of storage chambers. The refrigerator 100 includes a refrigerating room 1, an ice making room 2 and a switching room 3 arranged side by side under the refrigerating room 1, a vegetable room 4 arranged under the ice making room 2 and the switching room 3, and vegetables. It is provided with a freezing chamber 5 arranged below the chamber 4.

The refrigerating room 1 is a storage room having a space for storing stored items inside. The temperature in the refrigerating chamber 1 is controlled in the refrigerating temperature range of + 3 ° C to + 10 ° C. The ice making chamber 2 is controlled to a freezing temperature zone of, for example, −17 ° C. or lower. The ice making chamber 2 is a storage chamber for storing ice that has been made. The switching chamber 3 is a storage chamber capable of switching the indoor temperature between a freezing chamber temperature zone and a vegetable chamber temperature zone in a plurality of stages. The vegetable room temperature range is, for example, + 3 ° C to + 10 ° C. The vegetable compartment 4 is a storage chamber in which the internal temperature is controlled in the vegetable chamber temperature zone. The freezing chamber 5 is a storage chamber whose internal temperature is controlled in the freezing temperature zone. Therefore, the freezing room 5 can store the stored material for a long period of time. Hereinafter, when the storage chambers such as the refrigerator compartment 1 and the ice making chamber 2 are not distinguished, they are simply described as storage chambers.

FIG. 2 is a cross-sectional view of the refrigerator 100 cut along the line II-II in FIG. In the refrigerator 100, the ingress of heat from the outside air is suppressed by the heat insulating box body 110 and the storage chamber door 6 arranged in front of each storage chamber. As a result, the inside of the refrigerator 100 can be maintained at a low temperature. The heat insulating box 110, which is the housing of the refrigerator 100, includes a plurality of storage rooms such as the above-mentioned refrigerating room 1 and ice making room 2, an outlet air passage 15 and a return air passage 16 which are circulation air passages, and various types. A cooling chamber 101 and a machine room 102 for accommodating the device, and a drain hole 13 which is a drainage channel connecting the cooling room 101 and the machine room 102 are formed. The refrigerator 100 includes a cooler 8, a blower 9, a heater 10, a heater roof 11, a drain pan 12, and a compressor 14. The cooler 8, the blower 9, the heater 10, the heater roof 11, and the drain pan 12 are housed in a cooling chamber 101 provided behind the vegetable compartment 4. The compressor 14 is housed in a machine room 102 provided at the lowermost part of the rear part of the refrigerator 100.

The cooler 8 is, for example, a fin tube heat exchanger in which fins having a thin metal plate are joined to a refrigerant pipe. By joining the refrigerant pipe and the fin by, for example, expanding the pipe, the contact thermal resistance between the refrigerant pipe and the fin is reduced. As a result, the fin efficiency is improved and the amount of heat exchange is improved.

The blower 9 sends the cold air cooled around the cooler 8 to each storage chamber via the blowout air passage 15. As a result, the temperature in the storage chamber is maintained at a low temperature. The blower 9 returns the air sent into each storage chamber to the cooler 8 via the return air passage 16. In this way, the air in the refrigerator 100 passes through the cooling chamber 101, the blowing air passage 15, each storage chamber, and the return air passage 16 formed in the heat insulating box 110 in this order, and returns to the cooling chamber 101 again. come. In this way, the air in the refrigerator 100 circulates in the circulation path formed in the heat insulating box 110 by the blower 9.

The heater 10 is arranged below the cooler 8. The heater 10 has a glass tube heater or a carbon heater, and is a warmer that heats the cooler 8 to melt ice such as frost adhering to the surface.

The heater roof 11 is provided between the cooler 8 and the heater 10. The heater roof 11 prevents the water dripping from the cooler 8 from directly hitting the heater 10.

The drain pan 12 receives water dripping from the cooler 8 and ice sliding down from the cooler 8 when the heater 10 operates. The water dropped on the drain plate 12 and the water melted from the ice that has slipped on the drain plate 12 are drained to the machine room 102 through the drain hole 13.

Further, the configuration of the return air passage 16 and its vicinity will be described in more detail. FIG. 3 is an enlarged view of the portion indicated by “III” in FIG. Note that FIG. 3 is also a cross-sectional view of the refrigerator 100 cut along the line III-III in FIG. FIG. 4 is a cross-sectional view of the refrigerator 100 cut along the IV-IV line in FIG. FIG. 5 is a perspective view of the first wall body 20 arranged in front of the wall bodies defining the return air passage 16. FIG. 6 is a rear view of the first wall body 20 as viewed from the arrow VI in FIG. The cutting position in the cross-sectional view shown in FIG. 3 corresponds to the position of lines III-III shown in FIG. Further, the cutting position in the cross-sectional view shown in FIG. 4 corresponds to the position of the IV-IV line shown in FIG.

As shown in FIG. 3, the return air passage 16 is connected to the cooling chamber 101 in which the cooler 8 is housed, and is an air passage that guides the air sent from each storage chamber to the cooling chamber 101. The return air passage 16 has a first air passage 16a extending in the vertical direction and a second air passage 16b extending diagonally rearward. As described above, the return air passage 16 has the first air passage 16a and the second air passage 16b having different extending directions, thereby forming a bent air passage. The front of the return air passage 16 is defined by the first wall body 20, and the rear of the return air passage 16 is defined by the second wall body 30. Further, the width W1 of the first air passage 16a and the width W2 of the second air passage 16b are set to different widths, and there is a relationship of W2> W1. It is assumed that the width in the depth direction, that is, the width in the left-right direction in the figure is constant over the entire length of the return air passage 16.

As shown in FIG. 3, the first wall body 20 has a front surface 21 which is a slope, a first vertical surface 22, a slope 23, and a second vertical surface 24. The front surface 21 of the first wall body 20 defines the rear side of the blowout air passage 15. The first vertical surface 22 and the slope 23 of the first wall body 20 define the front of the return air passage 16. On the other hand, the second vertical surface 24 of the first wall body 20 defines a part in front of the cooling chamber 101. As shown in FIG. 3, there is a gap between the upper side of the first vertical surface 22 and the lower side of the slope 23. The first wall body 20 is formed with a groove portion 17 due to a deviation generated between the first vertical surface 22 and the slope 23. The groove portion 17 is formed in a triangular shape, and the lower end thereof is located below the other corner portions. As a result, the groove portion 17 receives water transmitted through the wall surface of the first wall body 20 as described later.

As shown in FIGS. 5 and 6, the groove portions 17 are formed on both sides of the water collecting portion 25 formed in the center of the first vertical surface 22. As shown in FIG. 6, the groove portion 17 is formed with a gradient descending toward the water collecting portion 25. As a result, the water received in the groove 17 is collected in the water collecting portion 25.

Below the water collecting portion 25, a water guiding portion 18 projecting rearward is formed. The water guiding portion 18 protruding from the first wall body 20 crosses the center of the return air passage 16 and connects to the second wall body 30. Looking at the cross section of the hatched water guide portion 18 in FIGS. 5 and 6, the upper surface of the water guide portion 18 is recessed toward the center. Further, the upper surface of the water guiding portion 18 is formed with a slope that descends toward the rear. As a result, the water collected by the water collecting section 25 is guided down the upper surface of the water guiding section 18 to the rear.

As shown in FIG. 3, the second wall body 30 has a vertical surface 31 and a slope 32. The vertical surface 31 and the slope 32 of the second wall body 30 define the rear of the return air passage 16. Further, as shown in FIGS. 3 and 4, the second wall body 30 is formed with a water passage hole 33 for passing the water guided by the water guide portion 18 to the rear. The water passage hole 33 is formed below the heater 10. Therefore, the air warmed by the heater 10 does not enter through the water passage hole 33, and the heat generated by the heater 10 can be efficiently transferred to the cooler 8. Further, since the heat generated by the heater 10 can be prevented from being transferred to the storage chamber, the temperature rise in the storage chamber is prevented.

Next, with reference to FIG. 7, the flow of water dissolved by operating the heater 10 will be described. FIG. 7 is an enlarged view of the inside of the refrigerator focusing on the cooling chamber 101 and the return air passage 16. The heater 10 is periodically operated to melt the ice adhering to the cooler 8. As a result, the ice adhering to the surface of the cooler 8 is melted into water droplets 41, and the water droplets 41 are dropped downward as shown by the arrow Y1. The water droplet 41 dropped in this way is received by the drain pan 12 shown in FIG. 2 and discharged from the drain hole 13.

Further, by operating the heater 10, the air around the heater 10 is warmed, and the air in the cooling chamber 101 is convected. Since the convected air contains water vapor, water droplets adhere when the air is blown onto the wall surface of the cooling chamber 101 and the wall surface of the return air passage 16. Alternatively, since warmed air is blown, the ice adhering to the wall surface melts and water droplets adhere. For example, when the water droplet 42 adheres to the vertical surface 103 defining the rear of the cooling chamber 101, the water droplet 42 propagates downward on the wall surface as shown by the arrow Y2, and is eventually discharged to the outside from the drain hole 13 shown in FIG. Will be done. On the other hand, when the water droplet 43 adheres to the slope 23 defining the front of the return air passage 16, the water droplet 43 travels along the slope 23 and is received by the groove portion 17 as shown by the arrow Y3. Further, when the water droplet 44 adheres to the second vertical surface 24 defining the front of the cooling chamber 101, the water droplet 44 is transmitted from the second vertical surface 24 to the slope 23 as shown by the arrow Y4, and is eventually received by the groove portion 17. Be done.

By operating the heater 10 in this way, the water droplets 41 melted from the ice adhering to the surface of the cooler 8 and the water droplets 42 adhering to the vertical surface 103 defining the rear of the cooling chamber 101 are returned to the air passage 16. It is discharged from the drain hole 13 without entering the drain hole 13. On the other hand, the water droplets 43 and 44 adhering to the slope 23 defining the front of the return air passage 16 and the second vertical surface 24 defining the front of the cooling chamber 101 enter the return air passage 16 along the wall surface. Eventually, it is received by the groove 17. The water received by the groove 17 is collected in the water collecting portion 25 shown in FIG. 5 along the downward gradient of the groove 17. As a result, the water guiding part 18 for guiding the water of the water collecting part 25 to the rear can be integrated into one. The water guided by the water guide unit 18 enters the cooling chamber 101 through the water passage hole 33 shown in FIG. 3, and is discharged to the outside from the drain hole 13. In this way, the water transmitted through the wall surface of the return air passage 16 can be received by the groove 17 and discharged to the outside. As a result, it is possible to prevent water from entering the freezing chamber 5 which is a storage chamber through the return air passage 16.

Subsequently, the flow of air entering the cooling chamber 101 through the return air passage 16 will be described with reference to FIG. 7. The air that has entered the return air passage 16 from below travels upward through the first air passage 16a as shown by the arrow Y4. As the traveling air enters the second air passage 16b extending diagonally backward, the traveling direction of the air changes diagonally backward as shown by the arrow Y5. In this way, the air passing through the return air passage 16 has no choice but to change its traveling direction on the way. However, since the width W2 of the second air passage 16b passing after changing the traveling direction is larger than the width W1 of the first air passage 16a, the traveling air can smoothly enter the second air passage 16b. .. The air that has entered the first air passage 16a travels through the second air passage 16b as shown by the arrow Y6 and enters the cooling chamber 101.

Here, the arrow Y5 indicates the flow of air in the vicinity of the groove 17. The arrow Y5 points diagonally backward, and the direction in which the arrow Y5 points is substantially the same as the direction in which the inlet 17a of the groove 17 formed in the first wall 20 faces. Therefore, it is possible to prevent the air flowing through the return air passage 16 from entering the groove portion 17, and it is possible to suppress the turbulence of the air generated in the return air passage 16. As a result, the load on the blower 9 shown in FIG. 2 can be reduced.

As described above, on the wall surface of the return air passage 16 of the refrigerator 100, a groove portion 17 for receiving the transmitted water and a water guiding portion 18 for guiding the water received by the groove portion 17 to the cooling chamber 101 are formed. .. As a result, it is possible to prevent the water that has traveled along the wall surface of the return air passage 16 from entering the storage chamber, and it is possible to prevent the stored product stored in the storage chamber from getting wet.

Further, the water received by the groove portion 17 is collected in the water collecting portion 25 provided in the center of the first wall body 20. As a result, the water guide portions 18 that cross the return air passage 16 can be integrated into one, and it is difficult to obstruct the air flow in the return air passage 16.

Further, in the return air passage 16, the width W2 of the second air passage 16b following the first air passage 16a is made larger than the width W1 of the first air passage 16a. As a result, air can smoothly enter the second air passage 16b, and the pressure loss of the circulating air can be suppressed.

Further, the direction in which the inlet of the groove 17 formed in the first wall 20 faces is substantially the same as the flow direction of the air flowing in the vicinity of the groove 17. Therefore, it is possible to prevent the air flowing through the return air passage 16 from entering the groove portion 17, and it is possible to suppress the turbulence of the air generated in the return air passage 16. As a result, the load on the blower 9 shown in FIG. 2 can be reduced.

Further, the formation position of the water passage hole 33 in the second wall body 30 is set below the heater 10, and the air warmed by the heater 10 is prevented from entering the water passage hole 33. As a result, the heat generated by the heater 10 can be efficiently transferred to the cooler 8. Further, since the heat generated by the heater 10 can be prevented from being transmitted to the storage chamber, it is possible to prevent the temperature in the storage chamber from rising.

In the above embodiment, the return air passage 16 connected to the cooling chamber 101 is composed of two first air passages 16a and a second air passage 16b extending in different directions. However, the return air passage may be configured by connecting three or more air passages extending in different directions, or may be configured by connecting two or more air passages extending in the same direction.

(Embodiment 2)
Next, the refrigerator according to the second embodiment, which is composed of two air passages whose return air passages extend in the same direction, will be described. FIG. 8 is an enlarged view of the inside of the refrigerator according to the second embodiment of the present invention. As shown in FIG. 8, the return air passage 116 connected to the cooling chamber 101 has a first air passage 116a and a second air passage 116b. The front of the return air passage 116 is defined by the first wall body 120, and the rear of the return air passage 116 is defined by the second wall body 130.

The first wall body 120 has a first slope 121 that defines the front of the first air passage 116a, and a second slope 122 that is parallel to the first slope 121 and defines the front of the second air passage 116b. There is. Further, the second wall body 130 has a slope 131 that is parallel to the first slope 121 and the second slope 122 and defines the rear of the first air passage 116a and the second air passage 116b. As described above, since the front and rear of the first air passage 116a and the second air passage 116b are defined from the slopes parallel to each other, the directions in which the air passages extend are the same. Therefore, unlike the return air passage 16 of the first embodiment, the return air passage 116 does not have a bent portion.

The first slope 121 and the second slope 122 are not in the same plane, and there is a gap between the two slopes. More specifically, the second slope 122 is formed at a position distant from the slope 131 of the second wall body 130 as compared with the first slope 121. As a result, the width W4 of the second air passage 116b defined in front by the second slope 122 is larger than the width W3 of the first air passage 116a defined in front by the first slope 121.

Further, the first wall body 120 is formed with a groove portion 117 due to a deviation generated between the first slope 121 and the second slope 122. The groove portion 117 formed in this way is formed at a connection position between the first air passage 116a and the second air passage 116b in which the width of the return air passage 116 is expanded. Therefore, the groove portion 117 does not obstruct the flow of air in the return air passage 116. Further, since the inlet of the groove portion 117 faces the downward direction of the air flowing in the vicinity, it is possible to prevent the air flowing in the return air passage 116 from entering the groove portion 117. As a result, air can flow smoothly in the return air passage 116, and the pressure loss of the air flowing through the return air passage 116 can be reduced. Since other basic configurations are the same as those in the first embodiment, the description thereof will be omitted.

(Embodiment 3)
Next, the refrigerator of the third embodiment will be described. In the refrigerator 100 of the first embodiment, the water received by the groove 17 is collected in the water collecting portion 25 formed in the center of the first wall body 20 and then directed toward the cooling chamber 101 by one water guiding portion 18. It was discharging. However, the method of discharging the water received by the groove 17 is not limited to such a form, and various methods can be adopted. As the third embodiment, a mode in which the water received in the groove portion is collected in the water collecting portions formed at the left and right ends of the first wall body and drained will be described. FIG. 9 is a rear view of the first wall 220 of the refrigerator according to the third embodiment of the present invention. Since the basic configuration excluding the configuration shown in FIG. 9 is the same as the configuration of the first embodiment, these explanations will be omitted.

The first wall 220 shown in FIG. 9 defines the front of the return air passage. The first wall body 220 has a first vertical surface 222, a slope 223, and a second vertical surface 224, similarly to the first wall body 20 of the first embodiment. The first wall 220 is formed with a groove 217 due to a deviation generated between the first vertical surface 222 and the slope 223. Further, a first water collecting portion 225a and a first water guiding portion 218a are provided at the right end portion of the first wall body 220, and a second water collecting portion 225b and a second water guiding portion 218b are provided at the left end portion. ing. The groove portion 217 is a first groove portion 217a descending from the center of the first wall body 220 toward the first water collecting portion 225a, and a second groove portion 217 descending from the center of the first wall body 220 toward the second water collecting portion 225b. It has a groove portion 217b. As a result, the water received by the groove portions 217 along the wall surface of the return air passage is collected by the first water collecting portions 225a and the second water collecting portions 225b provided at both ends of the first wall body 220. The collected water is drained to the cooling chamber by the first headrace 218a and the second headrace 218b that cross the end of the return air passage.

As described above, in the refrigerator according to the third embodiment, by collecting water at both ends of the first wall body 220, the first water conducting part 218a and the second water conducting part 218b for guiding the collected water are connected to the return air passage. Can be crossed at the end of the. As a result, the return air passage is not divided by the first headrace portion 218a and the second headrace portion 218b, so that the air flow in the return air passage can be smoothed.

(Embodiment 4)
Next, the refrigerator of the fourth embodiment will be described. FIG. 10 is a rear view of the first wall 320 of the refrigerator according to the fourth embodiment of the present invention. In the present embodiment, only one water collecting portion for collecting the water received in the groove portion is provided at the end of the first wall body 320. Since the basic configuration excluding the configuration shown in FIG. 10 is the same as the configuration of the first embodiment, these explanations will be omitted.

The first wall body 320 shown in FIG. 10 defines the front of the return air passage. The first wall body 320 has a first vertical surface 322, a slope 323, and a second vertical surface 324, similarly to the first wall body 20 of the first embodiment. The first wall body 320 is formed with a groove portion 317 due to a deviation generated between the first vertical surface 322 and the slope 323. Further, a water collecting portion 325 and a water guiding portion 318 are provided at the right end portion of the first wall body 320. The groove portion 317 is formed with a gradient descending from the left end portion of the first wall body 320 toward the water collecting portion 325. As a result, the water received by the groove portion 317 is collected by the water collecting portion 325 provided at the right end portion of the first wall body 320. The collected water is drained to the cooling chamber by a headrace 318 that crosses the end of the return air passage.

As described above, in the refrigerator according to the fourth embodiment, by collecting water at the right end portion of the first wall body 320, the water guiding portion 318 that conducts the collected water can be crossed at the end portion of the return air passage. .. As a result, the return air passage is not divided by the headrace portion 318, so that the air flow in the return air passage can be smoothed.

The above-described embodiment is shown only for explaining the features of the present invention, and does not limit the scope of the present invention. It is possible to transform or apply the above embodiment to various aspects.

The arrangement of each room of the refrigerator 100 described above is limited to such an arrangement, although the refrigerating room 1, the ice making room 2, the switching room 3, the vegetable room 4, and the freezing room 5 are arranged in order from the top. It's not a thing. For example, the vegetable compartment 4 and the freezing compartment 5 may be interchanged. As described above, the configuration in which the freezing chamber 5 is provided between the vegetable compartment 4 and the ice making chamber 2 and the switching chamber 3 is called a mid-freezer type. By adopting such a configuration, since the low temperature chambers such as the ice making chamber 2, the switching chamber 3, and the freezing chamber 5 are closer to each other than the configuration of the first embodiment, the heat insulating material between these chambers becomes unnecessary. , There is little heat leakage. As a result, energy saving and cost reduction can be realized.

Further, although it has been explained that the groove portions 17, 117, 217, and 317 formed on the wall surface defining the return air passages 16 and 116 are formed in an acute-angled triangular shape at the lower end, they may be formed in other shapes. Good. For example, the lower end of the groove may be arcuate to have a rounded shape.

Further, in the above embodiment, the grooves 17, 117, 217, and 317 are formed on the wall surface defining the front of the return air passages 16 and 116, but further define the left and right sides of the return air passages 16 and 116. It may be provided on the wall surface. In this case, the groove portion formed on the wall surface defining the left side and the right side is preferably continuous with the groove portion 17, 117, 217, 317 formed on the wall surface defining the front side. As a result, the received water can be drained through the front groove portions 17, 117, 217, and 317.

Further, although it has been explained that the widths of the return air passages 16 and 116 in the left-right direction are constant over the entire length, they may be gradually increased toward the downstream side. As a result, the air passing through the return air passages 16 and 116 can be easily flowed, and the load applied to the blower 9 can be reduced.

Further, the direction in which the return air passages 16 and 116 extend can be any direction. However, it is necessary to direct the water adhering to the return air passage or the wall surface of the cooling chamber in the direction of being transmitted to the groove formed in the return air passage by receiving gravity.

The present invention allows for various embodiments and modifications without departing from the broad spirit and scope. Moreover, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention. That is, the scope of the present invention is indicated not by the embodiment but by the claims. And various modifications made within the scope of the claims and within the equivalent meaning of the invention are considered to be within the scope of the present invention.

1 Refrigerator room, 2 Ice making room, 3 Switching room, 4 Vegetable room, 5 Freezer room, 6 Storage room door, 8 Cooler, 9 Blower, 10 Heater, 11 Heater roof, 12 Drain dish, 13 Drain hole, 14 Compressor, 15 Blow-out air passage, 16 Return air passage, 16a 1st air passage, 16b 2nd air passage, 17 groove, 17a inlet, 18 headrace, 20 1st wall, 21 front, 22 1st vertical plane, 23 slope, 24 2nd vertical plane, 25 water collecting part, 30 2nd wall body, 31 vertical plane, 32 slope, 33 water passage hole, 100 refrigerator, 101 cooling chamber, 102 machine room, 103 vertical plane, 110 insulation box body, 116 Return air passage, 116a 1st air passage, 116b 2nd air passage, 117 groove, 120 1st wall, 121 1st slope, 122 2nd slope, 130 2nd wall, 131 slope, 217 groove, 217a 1st Groove, 217b 2nd groove, 218a 1st headrace, 218b 2nd headrace, 220 1st wall, 222 1st vertical plane, 223 slope, 224 2nd vertical plane, 225a 1st water collection part, 225b 2nd Water collecting part, 317 groove part, 318 water guiding part, 320 1st wall body, 322 1st vertical plane, 323 slope, 324 2nd vertical plane, 325 water collecting part.

Claims (7)

A storage chamber for storing stored matter, a cooling chamber for cooling the internal air, a circulation passage connecting the storage chamber and the cooling chamber to form an internal air passage, and draining water in the cooling chamber. A housing with a drainage channel for
A cooler housed in the cooling chamber to cool the surrounding air,
A warmer that heats the cooler and melts the ice adhering to the cooler.
A blower that sends the cold air cooled by the cooler to the storage chamber through the circulation path and returns the air in the storage chamber to the cooling chamber through the circulation path to circulate the internal air. With
Of the circulation passages, the return air passage that sends the air in the storage chamber to the cooling chamber extends from diagonally below and is connected to the side surface of the cooling chamber.
A groove is formed on the wall surface of the return air passage to receive water that has entered the return air passage from the wall surface of the cooling chamber .
refrigerator. The groove portion has a downward slope that allows the received water to flow down toward the catchment portion.
The refrigerator according to claim 1. A water guide section for guiding the water collected in the water collecting section to the cooling chamber is provided.
The refrigerator according to claim 2. The return air passage has a first air passage and a second air passage through which air passing through the first air passage passes and has a width wider than the width of the first air passage.
The refrigerator according to any one of claims 1 to 3. The groove is formed at a connection position between the first air passage and the second air passage.
The refrigerator according to claim 4. The first air passage is formed so as to extend in the first direction.
The second air passage is formed so as to extend in a second direction different from the first direction.
The refrigerator according to claim 4 or 5. The groove is formed by a gap generated between the wall surface forming the first air passage and the wall surface forming the second air passage.
The refrigerator according to any one of claims 4 to 6.

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