JP2008002731A - refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem on increase of costs caused by installation of an air volume control device for preventing warm moisture from rising in defrosting, as the warm moisture is likely to rise from a return air trunk side of each compartment in defrosting a cooler, and frost formation is found on inside compartments of each compartment and each air trunk. <P>SOLUTION: Refrigerator comprises: a refrigerating compartment 102; a cooler chamber receiving the cooler 107; and the return air trunk 118 for returning the cold air from the refrigerating compartment 102 to the cooler chamber. A rib 121 is disposed in the return air trunk 118 from the refrigerating compartment 102 positioned at an upper part with respect to the cooler chamber to disturb a part of the flow of cold air, and thus the inflow of warm moisture in defrosting into the storing compartment is minimized with a simple structure, and the refrigerator of high reliability is provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air passage structure of a refrigerator.

  In recent years, refrigerators with various layouts have been put on the market (see, for example, Patent Document 1).

Refrigerators are multi-chambered, each room has a discharge air passage and a return air passage, and cold air is circulated directly to the cooling chamber. FIG. 5 shows a conventional refrigerator described in Patent Document 1. As shown in FIG. As shown in FIG. 5, the refrigerator main body 1, the refrigerating chamber 2 provided at the top of the main body, the switching chamber 3 provided below the refrigerating chamber, and the switching chamber 3 provided in parallel below the refrigerating chamber 2. Ice making room 4, freezing room 5 provided at the bottom of the main body, switching room 3 installed in parallel, vegetable room 6 provided between ice making room 4 and freezing room 5, and a cooler for generating cold air 7, an internal stirring fan 8 that sends cold air to each chamber, a refrigerator air volume adjusting device 9 that adjusts the amount of cold air discharged to the refrigerator compartment 2, and the amount of cold air discharged to the ice making chamber 4 The ice making chamber air volume adjusting device 11 to be adjusted and the switching chamber air volume adjusting device 10 to adjust the amount of cool air discharged to the switching chamber 3, and the freezing chamber discharge air for supplying the cold air to the freezing chamber 5 are provided. An ice making chamber discharge air passage 13 having an ice making chamber air volume adjusting device 11 for supplying cold air to the ice making chamber 4; An ice making chamber return air passage 14 for returning cold air from the ice chamber 4 to the cooler 7, a switching chamber discharge air passage 15 having a switching chamber air volume adjusting device 10 for supplying cold air to the switching chamber 3, and the switching chamber 3. From the refrigerating room 2 to the vegetable room 6, the refrigerating room discharge air path 17 having the refrigerating room air volume adjusting device 9 for supplying cold air to the refrigerating room 2, and the vegetable room 6. The refrigeration chamber return air passage 18 for returning to the vegetable compartment and the vegetable compartment return air passage 19 for returning the cold air sent to the vegetable compartment 6 to the cooler 7 are configured.
JP 2001-221555 A

  However, in the above-described conventional configuration, the discharge air passage is provided with a fan and a damper, and there is a branch of the air passage for distributing each room, which is a complicated, narrowed and enlarged structure. The resistance is large compared to the return air path constructed in a substantially straight line, so that when the cooler defrosts, warm humidity tends to rise from the return air path side of each room, and the internal parts of each room and each air path Had the problem of frosting. Moreover, in order to prevent the rise of warm humidity at the time of defrosting, the air volume adjusting device (damper) had to be installed, and there was a problem that the cost was increased.

  The present invention solves the above-described conventional problems, and a rib shape is provided in a part of a return air passage that is configured substantially linearly, and a trap is provided locally. An object of the present invention is to provide a refrigerator having a high frosting reliability while minimizing the inflow to the interior.

  In order to solve the above-described conventional problems, a refrigerator according to the present invention includes a storage room, a cooler room that houses a cooler, and a return air passage for returning cold air from the store room to the cooler room. In the refrigerator, a barrier portion is provided in the return air passage from the storage chamber located above the cooler chamber so as to inhibit a part of the flow of cold air.

  As a result, an increase in warm humidity during defrosting can be suppressed by the ribs in the return air passage, and the influence on the interior can be minimized.

  In the refrigerator of the present invention, the barrier portion is provided in the return air passage so as to inhibit a part of the flow of the cold air, thereby minimizing the inflow of the warm humidity into the storage chamber at the time of defrosting. A highly reliable refrigerator can be obtained.

  The invention according to claim 1 is a refrigerator including a storage chamber, a cooler chamber for storing a cooler, and a return air passage for returning cool air from the storage chamber to the cooler chamber. A structure that facilitates inflow of warm and humid air into the storage chamber during defrosting by providing a barrier so as to block part of the flow of cold air in the return air passage from the storage chamber located above the chamber Can be kept to a minimum, and a highly reliable refrigerator can be obtained.

  According to a second aspect of the present invention, in the first aspect of the present invention, a plurality of the barrier portions are provided, and a crank-shaped air passage is formed in the return air passage, whereby the warm and humid air being defrosted at the crank portion is formed. The amount of warm and humid flowing into the cabinet can be further reduced by increasing the pressure of and reducing the flow rate of warm and humid.

  According to a third aspect of the present invention, in the invention of the second aspect, the plurality of barrier portions are arranged to face each other in the return air passage, so that the amount of warm and humid air flowing into the interior more efficiently. Can be reduced.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the barrier portion is provided on a side closer to the cooler chamber in the return air passage, thereby defrosting. While suppressing the warm and humid inside, the heat exchange with the cooler can be promoted at the same time, and the amount of warm and humid flowing into the cabinet can be further reduced.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the air path resistance of the return air path is obtained by inclining the tip of the barrier portion toward the cooler chamber. Therefore, the cooling capacity can be ensured without reducing the air volume. In addition, the moisture adhering to the barrier portion easily flows when the warm air rises, and it is possible to prevent the remaining ice during the cooling operation.

  A sixth aspect of the present invention is the structure according to any one of the first to fifth aspects, wherein the barrier portion is formed in a rib shape and is formed integrally with the return air passage, so that the structure is inexpensive and does not vary. It can be.

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

(Embodiment 1)
FIG. 1 is a front view illustrating a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is an enlarged view of the return air passage for the refrigerator compartment of the refrigerator according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the refrigerator main body 101, the refrigerator compartment 102 provided in the upper part of this main body, the freezer compartment 105 provided in the lower part of the refrigerator compartment 102, the cooler 107 which produces | generates cold air, An internal stirring fan 108 to be sent to each chamber, a freezer compartment discharge air passage 112 for supplying cold air to the freezer compartment 105, a refrigerating room discharge air passage 117 for supplying cold air to the refrigerating chamber 102, There are a refrigerating room air volume adjusting device 109 provided in the refrigerating room discharge air passage 117, and a refrigerating room return air passage 120 for returning cold air from the refrigerating chamber 102 to the cooling chamber 107. The cooler 107 is disposed in a cooler chamber (not shown) on the rear surface of the freezing chamber 105. A rib 121 serving as a barrier portion that covers at least 1/3 or more of the air passage area is provided in a part of the return air passage 120 for the refrigerator compartment. In addition, the distribution of the air volume to the refrigerator compartment 102 and the freezer compartment 105 is divided into the ratio of the cross-sectional area of the freezer compartment discharge air passage 112 to that of the refrigerator compartment discharge air passage 117, and the refrigerator compartment 102 and the freezer compartment 105 have a predetermined temperature. If it sets so that it may come out, the air volume adjustment apparatus 109 for refrigerator compartments may not be necessary. A defrosting means (not shown) is installed below the cooler 107.

  The refrigerator main body 101 encloses a refrigerant in a refrigeration cycle in which a compressor (not shown), a condenser (not shown), a decompressor (not shown), and a cooler 107 are sequentially connected in an annular manner. Then, cooling operation is performed. In recent years, a flammable refrigerant is often used as the refrigerant for environmental protection. The cooler 107 is made of aluminum or copper.

  The refrigeration chamber discharge air passage 117 may be frosted on the surface of the discharge air passage for the refrigeration chamber due to the temperature difference between the discharge air temperature and the refrigeration chamber 102. Therefore, the surface is a plastic part, and the discharge air passage is a heat insulating material. For example, it is made of foamed polystyrene or urethane resin. Thereby, the appearance and high frosting reliability can be ensured. Thereby, the inside of the refrigerator compartment 102 can be designed widely and usability improves.

  The refrigerator air volume adjusting device 109 uses a damper that opens and closes a flap by a stepping motor that does not need to be energized at all times and that can obtain a high energy saving effect. The refrigerator air volume adjusting device is installed near the inlet of the refrigerator air discharge air passage 117. As a result, when the refrigerator air volume adjusting device 109 is closed, the cooling air can be circulated only in the freezer compartment 105, and highly efficient cooling performance can be obtained. Further, even when the refrigerating room discharge air passage 117 discharges from both sides in the left-right direction in order to improve the temperature distribution of the refrigerating room 102, the air volume of the refrigerating room can be adjusted with one air volume adjusting device. If it is installed between the downstream of the internal stirring fan and the branch point of the discharge air passage 117 for the refrigerator, it can be adjusted with one air volume adjustment device, but it is easy to use because the installation position is limited. There was a problem of reducing the product.

  As the defrosting means, a glass tube heater capable of generating a high temperature is used. Thereby, not only the defrosting of the cooler 107 but also the internal stirring fan 108 and the accumulator (not shown) installed in the vicinity of the cooler 107 and the frost in the vicinity of the air passage can be removed.

  As shown in FIG. 2, the rib 121 provided in a part of the return air passage 120 for the refrigerator compartment is made of plastic, a heat insulating material made of, for example, urethane or styrofoam, and plastic. It has a layered structure. By providing protrusions integrally on the plastic surface, a part of the return air passage 120 for the refrigerator compartment is formed into a rib shape. Thereby, the raise of the warm air heated at the time of defrosting can be suppressed, without increasing the number of parts of a refrigerator.

  Further, the rib-shaped portion 121 is inclined toward the tip in the direction in which cold air flows during normal operation (the direction of the cooler chamber that houses the cooler). Thereby, frost water can be smoothly returned to the periphery of the cooler 107 even when the refrigeration room return air passage 120 is frosted during normal operation and melted during defrosting.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. A configuration in which the freezer compartment 105 is installed downward and the refrigerator compartment 102 is installed upward is often used from the viewpoint of ease of use. However, in this configuration, since the cooler 107 is disposed below, the air heated during the defrosting rises, so that there is a problem in that the temperature is affected through the return air passage into the upper chamber. . Further, when a relatively low temperature chamber is disposed above the cooler 107, such as an ice making chamber, the influence of the temperature rise is particularly large. When a predetermined defrosting timing comes according to the operation state of the refrigerator, the defrosting means is operated and at the same time the refrigerator air volume adjustment device 109 is closed. When the defrosting of the cooler 107 is started, the temperature of the return air passage 120 for the refrigerating chamber starts to rise before the discharge air passage 117 for the refrigerating chamber where the cooler 107 having a large thermal mass is located, and the warm and humid air is cooled. The return air passage 120 starts to rise. When the warm humidity rises up to the portion 121 where the rib shape is provided in the return air channel 120 for the refrigerator compartment, the pressure in the air channel increases due to the reduction of the air channel area due to the rib shape, and the flow rate of the warm humidity is increased. The amount of warm and humid air that decreases and flows into the refrigerator compartment 102 can be reduced. The direction of the rib may be adjusted according to the shape of the air path, for example, by setting it to the front-rear direction or the left-right direction.

  In addition, by providing a plurality of ribs provided in the refrigerating chamber return air passage 120 and forming a crank shape, the pressure in the air passage increases at the crank portion, the flow rate of warm and humid air decreases, and the refrigerating chamber 102 The amount of warm and humid air flowing in can be further reduced. In particular, by providing the crank portion in the vicinity of the defrosting means, the temperature rise can be reduced and the defrosting efficiency can be further increased. The direction of the rib of the crank portion may be adjusted by adjusting the shape of the air passage, for example, in the front-rear direction or in the left-right direction. Further, the height of the ribs can be further improved if the tips of the ribs intersect each other in the vertical direction. Moreover, it is good to set it as the height which can demonstrate an effect most by changing height in each rib.

  In addition, by installing a crank portion composed of a plurality of ribs provided in the refrigerating room return air passage 120 in the vicinity of the cooler 107, the warm and humid air in the refrigerating room return air passage 120 is converted into the refrigerating room return air. It is cooled by a crank part constituted by a plurality of ribs provided in the passage 120, and the rise of warm moisture into the refrigerator compartment 102 can be further suppressed. In particular, by providing the crank portion in the vicinity of the defrosting means, the temperature rise can be reduced and the defrosting efficiency can be further increased.

  In addition, by changing the interval between the ribs of the crank portion constituted by a plurality of ribs provided in the return air passage 120 for the refrigerator compartment, the flow rate of the warm and humid air is lowered stepwise due to the pressure difference in the crank portion, The amount of warm and humid air flowing into the refrigerator compartment 102 can be further reduced. In the interval between the ribs constituting the crank portion, it is more effective to reduce the interval between the upper rib and the rib.

  In addition, in the shape of the rib provided in the refrigerating room return air passage 120, the upper portion of the rib is R-shaped or C-surfaced so that the obtuse angle is less than a right angle with respect to the flow of cold air, and the lower portion is an acute angle rather than a right angle. Since the air path resistance of the air path can be reduced, the cooling capacity can be ensured without reducing the air volume. In addition, water adhering to the ribs easily flows when the warm air rises, and it is possible to prevent ice from remaining during the cooling operation. When the angle is 5 ° C. or more, the drainage effect is further exhibited. Moreover, since the lower side of the rib has an acute angle, an edge can be applied, the pressure in the return air passage is increased, the flow rate of the warm humidity is reduced, and the amount of warm moisture flowing into the refrigerator compartment 102 is further reduced. be able to. In particular, by providing the crank portion in the vicinity of the defrosting means, the temperature rise can be reduced and the defrosting efficiency can be further increased. The direction of the rib of the crank portion may be adjusted by adjusting the shape of the air passage, for example, in the front-rear direction or in the left-right direction. Further, the height of the rib is preferably set to a height at which the effect can be most exhibited by changing the height of each rib. In addition, the plurality of ribs 121 can be arranged to face each other in the return air passage, thereby efficiently forming a crank portion.

  As described above, the temperature rise around the cooler 107 can be efficiently increased by holding the warm air by suppressing the rise of warm air from the return air passage 120 for the refrigerator compartment by the barrier portion (rib). Therefore, it is possible to increase the defrosting efficiency, thereby shortening the defrosting time, reducing the power consumption, and improving the defrosting reliability. Further, by stopping the inflow of warm and humid air from the return air passage 120 for the refrigerator compartment, the same frosting reliability in the refrigerator compartment 102 can be obtained without the flow controller 109 for the refrigerator compartment.

  In addition, by providing a place where the cross-sectional area is larger than the other part in the air passage in the part where the rib is added, locally providing a chamber and providing a place to store warm and humid air during defrosting, The inflow of warm moisture into the cabinet can be further reduced.

(Embodiment 2)
FIG. 3 is a front view illustrating the refrigerator according to Embodiment 2 of the present invention.

  As shown in FIG. 3, a refrigerator main body 201, a refrigeration room 202 provided at the upper part of the main body, a freezing room 205 provided at the lower part of the main body, and a vegetable room 206 provided between the refrigeration room 202 and the freezing room 205. A cooler 207 for generating cold air, an internal stirring fan 208 for sending the cold air to each chamber, a freezing chamber discharge air passage 212 for supplying cold air to the freezing chamber 205, and the cold storage chamber 202. Refrigerating room discharge air passage 217 for supply, refrigerating room air volume adjusting device 209 provided in refrigerating room discharge air passage 217, and for refrigerating room for returning cold air from refrigerating room 202 to vegetable room 206 There is a return air path 218 and a vegetable room return air path 219 for returning from the vegetable room 206 to the cooling room 207. In addition, a part of the return air passage 218 for the refrigerator compartment may be directly returned to the cooler 207. Thereby, the quantity of the cool air which flows into the vegetable compartment 206 can be reduced, and the freshness of vegetables can be improved. At this time, the effect described in the first embodiment can be obtained by providing a rib shape in a part of the air passage returning directly from the refrigerator compartment 202 to the cooler 207. A part 221 provided with a rib shape is provided in a part of the return passage 219 for the vegetable room. In addition, the distribution of the air volume to the refrigerator compartment 202 and the freezer compartment 205 is divided into the ratio of the sectional area of the discharge fan passage 212 for the freezer compartment to the outlet air passage 217 for the refrigerator compartment, and the refrigerator compartment 202 and the freezer compartment 205 have a predetermined temperature. If it sets so that it may come out, the air volume adjustment apparatus 209 for refrigerator compartments may be omitted. Further, defrosting means (not shown) is installed near the cooler 207.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the predetermined defrosting timing comes according to the operating state of the refrigerator, the refrigerator air volume adjusting device 209 is closed simultaneously with the operation of the defrosting means. When the defrosting of the cooler 207 starts, the temperature of the return air channel 219 for the vegetable room starts to rise before the discharge air channel 217 for the cold room where the cooler 207 with a large thermal mass is located, and the warm and humid air is The return air passage 219 starts to rise. When the warm humidity rises to the portion 221 provided with the rib provided in the vegetable room return air channel 219, the pressure in the air channel increases due to the reduction of the air channel area due to the rib shape, and the flow rate of the warm humidity decreases. Thus, the amount of warm moisture flowing into the vegetable compartment 206 can be reduced. In particular, since the vegetable compartment 206 is not provided with a flow rate adjusting device, the effect of preventing an increase in warm humidity is great. Further, since the vegetable room 206 normally stores food with a lot of moisture, it is a condition where moisture is higher than other rooms and condensation is likely to occur, and the problem due to the inflow of warm moisture is significant.

  The direction of the rib may be adjusted according to the shape of the air path, for example, by setting it to the front-rear direction or the left-right direction.

  In addition, by providing a plurality of ribs provided in the vegetable compartment return air passage 219 and forming a crank shape, the pressure in the air passage increases at the crank portion, the flow rate of warm and humid air decreases, and the inside of the vegetable compartment 206 is reduced. The amount of warm and humid air flowing into can be further reduced. In particular, by providing the crank portion in the vicinity of the defrosting means, the temperature rise can be reduced and the defrosting efficiency can be further increased. The direction of the rib of the crank portion may be adjusted by adjusting the shape of the air passage, for example, in the front-rear direction or the left-right direction. Further, the height of the ribs can be further improved if the tips of the ribs intersect each other in the vertical direction. Moreover, it is good to set it as the height which can demonstrate an effect most by changing height in each rib.

  In addition, by installing a crank portion composed of a plurality of ribs provided in the vegetable room return air passage 219 in the vicinity of the cooler 207, the warm humidity in the vegetable room return air passage 219 is changed to the vegetable room return air. It is cooled by a crank part constituted by a plurality of ribs provided in the path 219, and the rise of warm moisture into the vegetable compartment 206 can be further suppressed. In particular, by providing the crank portion in the vicinity of the defrosting means, the temperature rise can be reduced and the defrosting efficiency can be further increased.

  In addition, by changing the interval between the ribs of the crank part composed of a plurality of ribs provided in the return air passage 219 for the vegetable room, the flow rate of the warm and humid is lowered stepwise due to the pressure difference in the crank part, The amount of warm and humid flowing into the vegetable compartment 206 can be further reduced. In the interval between the ribs constituting the crank portion, it is more effective to reduce the interval between the upper rib and the rib.

  In addition, in the shape of the rib provided in the vegetable room return air path 219, the upper part of the rib has an R shape or a C surface, and the obtuse angle is less than a right angle, and the lower part is an acute angle than the right angle, so that the air path of the return air path Since the resistance can be reduced, the cooling capacity can be ensured without reducing the air volume. In addition, the water adhering to the ribs easily flows when the warm air rises, and it is possible to prevent ice accumulation during the cooling operation. When the angle is 5 ° C. or more, the drainage effect is further exhibited. Moreover, since the lower side of the rib has an acute angle, the edge can be applied, the pressure in the return air passage becomes higher, the flow rate of the warm moisture decreases, and the amount of warm moisture flowing into the vegetable compartment 206 further decreases. Can be made. In particular, by providing the crank portion in the vicinity of the defrosting means, the temperature rise can be reduced and the defrosting efficiency can be further increased. The direction of the rib of the crank portion may be adjusted by adjusting the shape of the air passage, for example, in the front-rear direction or in the left-right direction. Further, the height of the rib is preferably set to a height at which the effect can be most exhibited by changing the height of each rib.

  In addition, since the warm air can be maintained by suppressing the rise of the warm air from the return air passage 219 for the vegetable room and the temperature around the cooler 207 can be efficiently raised, the defrosting efficiency can be increased. Therefore, it is possible to shorten the defrosting time, reduce the power consumption, and improve the defrosting reliability.

  In addition, by providing a place where the cross-sectional area is larger than the other part in the air passage in the part where the rib is added, locally providing a chamber and providing a place to store warm and humid air during defrosting, The inflow of warm moisture into the cabinet can be further reduced.

(Embodiment 3)
FIG. 4 is a front view illustrating the refrigerator according to Embodiment 3 of the present invention.

  As shown in FIG. 4, a refrigerator main body 301, a refrigerating room 302 provided in the upper part of the main body, a switching room 303 provided under the refrigerating room 302, which can be changed to a temperature setting from refrigeration to freezing, The ice making room 304 provided in parallel with the switching room under the room, the freezing room 305 provided in the lower part of the main body, the switching room 303 installed in parallel, and the ice making room 304 and the freezing room 305 were provided. A vegetable room 306, a cooler 307 for generating cold air, a fan 308 for stirring in the chamber for sending cold air to each room, an air volume adjusting device 309 for the cold room for adjusting the amount of cold air discharged to the cold room 302, The ice making room air volume adjusting device 311 for adjusting the amount of cold air discharged to the ice making room 304 and the switching room air volume adjusting device 310 for adjusting the amount of cold air discharged to the switching chamber 303 are provided. For supplying cold air A freezing chamber discharge air passage 312, an ice making chamber discharge air passage 313 having an ice making chamber air volume adjusting device 311 for supplying cold air to the ice making chamber 304, and an ice making chamber for returning cold air from the ice making chamber 304 to the cooler 307. Return air passage 314, a rib shape 321 provided in a part of the air passage of the ice making room return air passage 314, and a switching chamber air volume adjusting device 310 for supplying cool air to the switching chamber 303 Refrigerating room discharge air path 317 having a discharge air path 315, a switching chamber return air path 316 returning from the switching chamber 303 to the cooler 307, and a refrigerating room air volume adjusting device 309 for supplying cold air to the refrigerating room 302. And a refrigeration room return air passage 318 for returning from the refrigerating room 302 to the vegetable room 306, and a vegetable room return air path 319 for returning the cool air sent to the vegetable room 306 to the cooler 307.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When a predetermined defrosting timing comes according to the operation state of the refrigerator, the defrosting means is operated, and at the same time, the air volume adjusting device 309 for the refrigerator compartment, the air volume adjusting device 311 for the ice making room, and the air volume adjusting device 310 for the switching room are set. close. When the defrosting of the cooler 307 is started, the temperature of the ice making room return air path 314 starts to rise before each discharge air path having the cooler 307 having a large thermal mass, and the warm and humid air returns to the ice making room return air. Begin to climb up the road 314. When the warm humidity rises to the part 321 provided with the rib provided in the return air path 314 for the ice making room, the pressure in the air path increases due to the reduction of the air path area due to the rib shape, and the flow rate of the warm humidity decreases. In addition, the amount of warm and humid air flowing into the ice making chamber 304 can be reduced.

  As a result, when the amount of warm and humid air flowing into the ice making chamber 304 decreases, the ice making chamber air volume adjusting device 310 installed in the ice making chamber discharge air passage 313 may not be provided. Thereby, a space-saving air passage configuration is possible.

  Further, since the vegetable room 306 in the refrigerated temperature zone is installed between the ice making room 304, the switching room 303, and the freezing room 305 in the freezing temperature zone, the natural convection and the warehouse when the internal stirring fan 308 is OFF. Although the flow of cold air differs greatly during forced convection when the internal stirring fan 308 is ON, the flow of cold air due to natural convection can be stopped by providing a rib shape in part of the return air path, during normal operation The flow of cold air can be regulated. In particular, the ice making chamber 304 has a function of automatically supplying ice by supplying water, so that condensation is likely to occur compared to other chambers. In addition, there is a problem that when condensation occurs in a low-temperature chamber due to the necessity of supplying cold air in a concentrated manner to the ice making machine, it is a problem that the condensation is concentrated locally, and this has been dealt with by providing an air volume adjusting device.

  It should be noted that by providing a plurality of ribs provided in the ice making chamber return air passage 314 and forming a crank shape, the pressure in the air passage increases at the crank portion, the flow rate of the warm and humid air decreases, and the ice making chamber 304 The amount of warm and humid air flowing into can be further reduced. In particular, by providing the crank portion in the vicinity of the defrosting means, the temperature rise can be reduced and the defrosting efficiency can be further increased. The direction of the rib of the crank portion may be adjusted by adjusting the shape of the air passage, for example, in the front-rear direction or in the left-right direction. Further, the height of the ribs can be further improved if the tips of the ribs intersect each other in the vertical direction. Moreover, it is good to set it as the height which can demonstrate an effect most by changing height in each rib.

  In addition, by installing a crank portion composed of a plurality of ribs provided in the ice making chamber return air passage 314 in the vicinity of the cooler 307, the warm humidity in the ice making chamber return air passage 314 is returned to the ice making chamber. Cooling is performed by a crank portion constituted by a plurality of ribs provided in the air passage 314, and the rise of warm humidity into the ice making chamber 304 can be further suppressed. In particular, by providing the crank portion in the vicinity of the defrosting means, the temperature rise can be reduced and the defrosting efficiency can be further increased.

  In addition, by changing the interval between the ribs of the crank portion constituted by a plurality of ribs provided in the return air passage 314 for the ice making chamber, the flow rate of the warm and humid air is lowered stepwise due to the pressure difference in the crank portion, The amount of warm and humid air flowing into the ice making chamber 304 can be further reduced. In the interval between the ribs constituting the crank portion, it is more effective to reduce the interval between the upper rib and the rib.

  In the shape of the rib provided in the return channel 314 for the ice making room, the upper part of the rib is R-shaped or C-surfaced and the obtuse angle is less than a right angle with respect to the flow of cold air, and the lower part is an acute angle than the right angle, Since the air path resistance of the return air path can be reduced, the cooling capacity can be ensured without reducing the air volume. In addition, water adhering to the ribs easily flows when the warm air rises, and it is possible to prevent ice from remaining during the cooling operation. When the angle is 5 ° C. or more, the drainage effect is further exhibited. In addition, since the lower side of the rib has an acute angle, an edge can be applied, the pressure in the return air passage becomes higher, the flow rate of the warm humidity decreases, and the amount of warm moisture flowing into the ice making chamber 304 is reduced. It can be further reduced. In particular, by providing the crank portion in the vicinity of the defrosting means, the temperature rise can be reduced and the defrosting efficiency can be further increased. The direction of the rib of the crank portion may be adjusted by adjusting the shape of the air passage, for example, in the front-rear direction or in the left-right direction. Further, the height of the rib is preferably set to a height at which the effect can be most exhibited by changing the height of each rib.

  In addition, since the warm air can be maintained and the temperature around the cooler 307 can be efficiently raised by suppressing the rise of the warm air from the return passage 314 for the ice making room, the defrosting efficiency can be increased. Therefore, it is possible to shorten the defrosting time, reduce the power consumption, and improve the defrosting reliability. Further, by stopping the inflow of warm and humid air from the ice making room return air passage 314, the same frosting reliability in the ice making room 304 can be obtained without the ice making room air volume adjusting device 311.

  In addition, by providing a place where the cross-sectional area is larger than the other part in the air passage in the part where the rib is added, locally providing a chamber and providing a place to store warm and humid air during defrosting, The inflow of warm moisture into the cabinet can be further reduced.

  As described above, the refrigerator according to the present invention can prevent a rise in warm humidity during defrosting by providing a rib shape in a part of the return air passage and locally providing a barrier portion. It is not necessary to install an air volume adjusting device such as a frosting device, and frosting reliability can be improved without cost. In addition, by providing an angle to the rib shape, it is possible to secure cooling capacity without reducing the air volume during normal operation, so it is applicable to all refrigeration equipment that has at least two rooms and performs defrosting automatically. it can.

Front view illustrating the refrigerator according to Embodiment 1 of the present invention. Sectional drawing explaining the refrigerator in Embodiment 1 of this invention Front view illustrating a refrigerator according to Embodiment 2 of the present invention Front view illustrating a refrigerator according to Embodiment 3 of the present invention Front view explaining a conventional refrigerator

Explanation of symbols

101, 201, 301 Refrigerator body 102, 202, 302 Refrigeration room 105, 205, 305 Freezer room 107, 207, 307 Cooler 120, 218, 318 Refrigeration room return air path 121, 221 and 321 Ribs in the return air path Shape part 206,306 Vegetable room 219,319 Return path for vegetable room 303 Switching room 304 Ice making room 314 Return air path for ice making room 316 Return air path for switching room

Claims (6)

  In a refrigerator comprising a storage room, a cooler room for storing a cooler, and a return air passage for returning cold air from the storage room to the cooler room, the storage room located above the cooler room A refrigerator characterized in that a barrier portion is provided in the return air passage so as to inhibit a part of the flow of cold air.   The refrigerator according to claim 1, wherein a plurality of the barrier portions are provided, and a crank-shaped air passage is formed in the return air passage.   The refrigerator according to claim 2, wherein the plurality of barrier portions are arranged to face each other in the return air passage.   The refrigerator according to any one of claims 1 to 3, wherein the barrier portion is provided on a side close to the cooler chamber in the return air passage.   The refrigerator according to any one of claims 1 to 4, wherein a tip end of the barrier portion is inclined toward the cooler chamber side.   The refrigerator according to any one of claims 1 to 5, wherein the barrier portion has a rib shape and is formed integrally with the return air passage.

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