JP2011133151A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator having a duct device in which a duct provided with a cold air path for cooling a refrigeration chamber is constituted on the back face thereof while a cooling passage is simplified to secure a proper air amount, and the depth dimension of a storage chamber is maintained for securing an internal volume. <P>SOLUTION: The refrigerator is provided with: the refrigeration chamber 35 provided in an upper part; a freezer 37 provided in a lower part; and a switching chamber 36 provided between the refrigeration chamber 35 and the freezer 37 whose temperature zone can be changed. The refrigerator 30 includes: a fan 46 that is arranged in an upper part of a cooler 44 and compulsorily blows generated cold air to each chamber; and the duct device 49 that is composed behind the switching chamber 36. Since the duct device 49 is composed of a refrigeration chamber air duct 48a, a switching chamber air duct 48b, and a refrigeration chamber feedback duct 51a which are laterally arranged, all chambers can be cooled by one cooler indirectly and efficiently, and the internal volume can be secured. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a refrigerator that forcibly circulates cold air generated by a cooler to cool each storage room having a different temperature range.

  FIG. 12 is a longitudinal sectional view of a conventional refrigerator.

  As shown in FIG. 12, the cabinet 1 shows a refrigerator configured by a heat insulating box 5 in which a heat insulating material 4 is filled between an inner box 2 and an outer box 3. The refrigerator has a refrigerator compartment 6, a storage compartment 7, and a freezer compartment 8 from above, and a front side is a refrigerator compartment opening / closing door 9, a storage compartment opening / closing door 10, and a freezer compartment opening / closing door 11.

  The refrigerator compartment 6 and the storage room 7 are partitioned by a partition plate 12 having a heat insulation effect, and the storage room 7 and the freezer compartment 8 are partitioned by a partition plate 13 having a heat insulation effect. A duct 14 connected to the freezer compartment 8 is installed in the back of the partition plate 13.

  In the refrigerator compartment 6, a refrigerator compartment shelf for storing food and a refrigerator compartment case are arranged. In addition, a tube-on-sheet 15 (evaporator) is disposed in contact with the wall surface on the back surface of the inner box 2 of the refrigerator compartment 6, and the refrigerator compartment 6 has a cooling wall surface cooled by the tube-on-sheet 15. It has become. A cooler 16 is disposed on the back of the freezer compartment 8, and a fan 17 is disposed above the cooler 16.

  In addition, the inside of the warm room 7 has a warm room for storing food, and a duct 18 having a damper 19 inside is disposed on the back side.

  About the refrigerator comprised as mentioned above, the operation | movement is demonstrated below.

  As for cooling of the refrigerator compartment 6, the tube-on-sheet 15 is in contact with the back surface of the inner box 5 of the refrigerator compartment 6, and the inner box 5 surface of the refrigerator compartment 6 serves as a cooling wall, and the refrigerator compartment in the refrigerator compartment 6 is naturally cooled. Cooling of shelves and refrigerator compartment cases.

  On the other hand, the cooling of the freezer compartment 8 is performed by forcibly circulating the cool air of the cooler 16 in the cooling chamber by the fan 17 to cool the inside of the freezer compartment 8. The cold air circulated in the freezer compartment 8 returns to the cooler 16.

  Further, the cooling of the warming chamber 7 is partly cooled by the fan 17 and flows into the duct 14 and circulates to the duct 18 on the back of the warming chamber 7. The cold air that has flowed into the duct 18 passes through the damper 19, is discharged into the storage room case, exchanges heat with the air in the storage room case, and then is sucked into the return duct to the cooler 16 on the back surface. Returned to

  As described above, in the present embodiment, the refrigerating room 6 and the storage room 7 do not form a passage through which the cold air is circulated by the partition plate 12, but are partitioned vertically, and the refrigerating room 6 is formed by cooling the tube-on-sheet 15. Cooling to an appropriate temperature, the holding chamber 7 circulates the latent heat of evaporation of the cooler 16 into the holding chamber 7 by the fan 17, and further controls the amount of cold air circulated by a damper that detects the temperature of the holding chamber 7. Thus, by keeping the temperature of the temperature-preserving chamber 7 constant, it becomes possible to keep the temperature of the food in the temperature-holding case constant, and the freshness of the food can be improved. (For example, refer to Patent Document 1).

JP 2005-195293 A

  However, in the above-described conventional configuration, the air path is not configured in the refrigerator compartment 6, and the temperature difference inside the chamber tends to be large between a location close to the tube-on-seat 15 and a location far away. Further, in order to uniformly cool the inside of the warming chamber 7, the inside of the duct 18 is divided into a plurality of passages so as to be diverged in various ways, and communicated with a plurality of discharge ports 20 provided on the top surface of the warming chamber 7. Since the cool air is discharged, the structure of the duct 18 is complicated, and the cool air guided from the cooler 16 by the fan 17 has an increased air path resistance in the duct 18 and cannot discharge a predetermined amount of cool air to the temperature keeping chamber 7. There was a possibility that the proper temperature could not be secured. Further, it is necessary to increase the air passage area in order to reduce the air passage resistance of the duct 18, and thus there is a possibility that the depth dimension of the thermal storage chamber 7 is reduced and the internal volume is reduced.

  The present invention solves the above-described conventional problems, and while simplifying the cooling air passage while configuring a duct having a cold air passage for cooling the refrigerator compartment on the back surface, ensuring an appropriate air volume, It aims at providing the refrigerator which has a duct apparatus which maintained the depth dimension and secured the internal volume.

  In order to solve the above-described conventional problems, a refrigerator according to the present invention includes a refrigeration room at the top, a freezer room at the bottom, a switching room that can switch a temperature zone between the refrigeration room and the freezer room, and a rear of the freezer room. A cooler that generates cool air, a fan that is disposed at the top of the cooler and forcibly blows the generated cool air to each chamber, a blower duct that blows cool air to the refrigerator compartment and the switching chamber, and In the refrigerator having a duct device that configures a cooler chamber return duct for returning cool air discharged into the cooler chamber to the cooler at the rear of the switching chamber, the air duct duct cools air to the refrigerator room. A cooling chamber ventilation duct, a switching chamber ventilation duct, and a refrigerating chamber return duct arranged side by side; Placement structure It is those that have been.

  As a result, cold air can be uniformly discharged into the refrigeration room, so that the temperature of the refrigeration room can be equalized, and the air duct structure of the duct device on the back of the switching room can be simplified to ensure the depth dimension of the switching room. Furthermore, the air volume to each storage room will be secured.

  The refrigerator of the present invention has a simplified structure of the air passage in the duct device, so that the storage chamber connected to the air passage can be uniformly cooled by improving the cooling efficiency, and the storage chamber in which the duct device is further arranged is reliable. It is possible to provide a refrigerator that secures the inner volume of the refrigerator.

The longitudinal cross-sectional view of the refrigerator in Embodiment 1 of this invention The front view of the main body in Embodiment 1 of this invention Schematic of the air path in Embodiment 1 of the present invention First exploded view of a duct device according to Embodiment 1 of the present invention. The 2nd exploded view of the duct device in Embodiment 1 of the present invention. The perspective view of the duct apparatus in Embodiment 1 of this invention The 3rd exploded view of the duct device in Embodiment 1 of the present invention. Schematic of the duct device in Embodiment 1 of the present invention 1 is an exploded view of a main part in Embodiment 1 of the present invention. The principal part perspective view in Embodiment 1 of this invention Main part schematic in Embodiment 1 of this invention Cross-sectional view of a conventional refrigerator

  The first invention includes a refrigerator compartment in the upper part, a freezer compartment in the lower part, a switching room in which a temperature zone can be switched between the refrigerator compartment and the freezer compartment, a cooler for generating cold air behind the freezer compartment, A fan that is arranged at the top of the cooler and forcibly blows the generated cool air to each room, a blower duct that blows cool air to the refrigerating room and the switching room, and the cool air discharged into the refrigerating room is cooled. A refrigerator having a refrigerating room return duct for returning to the refrigerator, and a duct device configured at the rear of the switching room, wherein the air blowing duct sends cold air to the refrigerating room and the switching room. The switching chamber blowing duct for blowing air is formed independently, and the duct device is configured such that the refrigeration chamber blowing duct, the switching chamber blowing duct, and the refrigeration chamber return duct are arranged side by side in the duct device. s wind The By was simplified structure, storage compartment which is connected to air passage to improve the cooling efficiency can uniformly cool, can provide a further refrigerator securing the internal volume of the storage chamber which is arranged a duct device.

  According to a second aspect of the present invention, in the refrigerator of the first aspect, a damper device for adjusting the amount of cold air to the refrigerating room and the switching room is embedded in the duct device, and the amount of air to the refrigerating room and the switching room is controlled by the damper device. Can be controlled to an appropriate temperature.

  According to a third aspect of the present invention, in the refrigerator according to the first aspect, the lower portion of the duct device includes a return port communicating with the switching chamber return duct for returning the cool air blown into the switching chamber to the cooler. After the cool air discharged to the inside circulates in the room, it is sucked in and returned to the return port provided at the lower portion, so that the discharged cold air can circulate uniformly in the switching room and can be cooled uniformly.

  According to a fourth aspect of the present invention, there is provided a heater according to any one of the first to third aspects, wherein the heater is energized according to a set temperature range of the switching chamber, and the heater is attached to the return duct of the refrigerator compartment of the duct device. Therefore, when the set temperature of the switching chamber is lower than the set temperature of the refrigerator compartment, condensation may occur in the return refrigerator duct, and the condensation can be suppressed by operating the attached heater.

  A fifth invention is the air blow duct for sending cold air to the refrigerating room and the switching room, wherein the refrigerating room return duct and the switching room return duct are independently configured in the longitudinal direction of the duct device. Can be designed large in the width direction.

  The sixth invention further includes a first partition wall that vertically divides the switching chamber and the freezer compartment in the fifth invention, and when the duct device is connected to the partition wall, the refrigerator compartment communicated with the return refrigerator duct A return communication port and a switching chamber return communication port communicating with the switching chamber return duct are opened at the front and rear positions of the first partition wall.

  A seventh invention is the sixth invention, comprising a cover coil that covers the cooler of the cooling chamber and partitions the freezing chamber and the cooling chamber, the cover coil communicating with the first partition wall, and the refrigerator compartment return communication A return passage that guides the return cold air that passes through the opening and the switching chamber return communication port to the lower part of the cooler, and the return passage forms a shunt duct that divides the return cold air of the refrigerator compartment and the return cold air of the switching chamber at least upstream Therefore, it is possible to prevent the backflow of the return cold air and to ensure the reliability of the switching chamber.

An eighth invention is the seventh invention according to the seventh invention, wherein the defrost heater is provided below the cooler and defrosts frost and ice attached to the cooler, and the cover coil covers the cooler and the defrost heater. And a cool air return passage formed in the cover coil and communicating with the cooler, wherein the defrost heater is disposed on the projection surface so as to extend from one end of the cooler into the cool air return passage. It is possible to prevent condensation and freezing in the return passage.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a longitudinal sectional view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a front view of a main body according to Embodiment 1 of the present invention, and FIG. 3 is an air path according to Embodiment 1 of the present invention. 4 is a first exploded view of the duct device according to the first embodiment of the present invention, FIG. 5 is a second exploded view of the duct device according to the first embodiment of the present invention, and FIG. 6 is an embodiment of the present invention. FIG. 7 is a third exploded view of the duct device according to the first embodiment of the present invention, FIG. 8 is a schematic diagram of the duct device according to the first embodiment of the present invention, and FIG. FIG. 10 is a fragmentary perspective view of the first embodiment of the present invention, and FIG. 11 is a schematic diagram of the principal portion of the first embodiment of the present invention.

  In FIG. 1, a heat insulating box 31 of a refrigerator 30 is mainly composed of an outer box 32 using a steel plate and an inner box 33 formed of a resin such as ABS, and inside thereof, for example, a foam insulation such as hard foam urethane. The material 34 is filled and insulated from the surroundings and divided into a plurality of storage chambers. The refrigeration chamber 35 is disposed at the top, the switching chamber 36 is disposed below the refrigeration chamber 35, and the freezing chamber 37 is disposed at the bottom.

  The refrigerator compartment door 38 opens and closes the front opening of the refrigerating room 35, the switching room door 39 opens the front opening of the switching room 36, and the freezing room door 40 opens and closes the front opening of the freezing room 37. It is freely pivoted.

  The refrigeration chamber 35 is normally set to 1 ° C. to 5 ° C. at the lower limit of the temperature at which it does not freeze for refrigerated storage, and the switching chamber 36 can be set to change the temperature from the refrigeration temperature zone to the refrigeration temperature zone. Can be set at intervals. The freezer compartment 37 is set in a freezing temperature zone and is usually set at −22 ° C. to −15 ° C. for frozen storage, but for example, −30 ° C. or −25 ° C. to improve the frozen storage state. It may be set at a low temperature.

  Further, the switching chamber 36 and the freezing chamber 37 are vertically partitioned by the first partition wall 41, and the refrigerator compartment 35 and the switching chamber 36 are vertically partitioned by the second partition wall 42.

  A cooling chamber 43 for generating cool air is provided on the back of the freezing chamber 37, and a cooler 44 is provided inside. The cooling chamber 43 is insulated from the freezing chamber 37 by a cover coil 45. A fan 46 that forcibly blows cool air generated above the cooler 44 is disposed, and a defrost heater 47 that defrosts frost and ice adhering to the cooler 44 is provided below the cooler 44. Yes. Specifically, the defrost heater 47 is a glass tube heater made of glass, and in particular, when the refrigerant is a hydrocarbon-based refrigerant gas, a double glass tube heater in which glass tubes are formed in a double manner is adopted for explosion protection. Has been. Further, the cover coil 45 is formed of a resin decorative plate 45a and an inner cover coil 45b in which a holding portion of the fan 46 and a cold air passage are formed by a heat insulating material such as a styrene material.

A duct device 49 having a cooling duct 35 and a blower duct 48 for blowing cool air to the switching chamber 36 is provided on the back surface of the switching chamber 36. The air duct 48 has a refrigerating room air duct 48a for sending cool air to the refrigerating room 35 and a switching room air duct 48b for sending cold air to the switching room 36, which are arranged side by side in the duct device 49 side by side in the vertical direction. ing. In the duct device 49, a damper device 50 for adjusting the amount of cold air to the refrigerator compartment 35 and the switching chamber 36 is embedded,
It arrange | positions in each duct of the refrigerator compartment ventilation duct 48a and the switching chamber ventilation duct 48b, and controls the amount of cold air to pass separately.

  The cold air discharged from the discharge port 35a of the refrigerating chamber 35 through the refrigerating chamber air duct 48a returns to the cooler 44 through the refrigerating chamber return duct 51a from the return port 35b provided on the lower back surface of the refrigerating chamber 35. The cold air discharged to the switching chamber 36 through the switching chamber air duct 48b returns to the cooler 44 from the switching chamber return port 36c provided in the lower part of the duct device through the switching chamber return duct 51b on the back surface of the switching chamber 36. To do.

  The refrigerating room return duct 51a is arranged side by side with the air duct 48, whereby three ducts of the refrigerating room air duct 48a, the switching room air duct 48b, and the refrigerating room return duct 51a are arranged vertically in the duct device 49. They are arranged side by side. The switching chamber return duct 51b is arranged next to the refrigerator compartment return duct 51a in the front-rear positional relationship, and the switching chamber return duct 51b is arranged in front of the refrigerator compartment return duct 51a.

  The duct device 49 is formed to have a large rear surface height and lateral width dimensions of the switching chamber 36, and the refrigeration chamber air duct 48 a and the switching chamber air duct 48 b are approximately in the center in the lateral width direction of the switching chamber 36, that is, the width direction of the duct device 49. The refrigerating room return duct 51a and the switching room return duct 51b are collectively arranged on one side of the duct device 49 centering on the refrigerating room air duct 48a and the switching room air duct 48b.

  The duct device 49 is composed of two parts, an upper duct member 49a and a lower duct member 49b, formed of foamed polystyrene, and a resin duct decorative plate 49c that covers the front surfaces of the upper duct member 49a and the lower duct member 49b. The lower surface portion of the duct member 49a and the upper surface portion of the lower duct member 49b are connected in the vertical direction, the connection surface is sealed, and the front surface is covered with the duct decorative plate 49c. Therefore, the refrigerating room air duct 48a and the switching room air duct 48b penetrating through the duct device 49 constitute a duct wall surface by connecting the upper duct member 49a and the lower duct member 49b.

  The damper device 50 is embedded in the lower duct member 49b. Specifically, the damper device frame 50a of the damper device 50 is disposed below the connection surface portion 49d of the lower duct member 49b that serves as a connection surface with the upper duct member 49a. It is buried to do.

  Further, on the other side of the duct device 49 centering on the refrigerating room air duct 48a and the switching room air duct 48b, a wiring housing portion 52 for housing the wiring and connectors of the damper device 50, and an automatic ice making device disposed in the refrigerating room 35 are provided. A recess 56 is formed in which a water supply pipe 55 that connects the water supply tank 53 and the ice tray 54 disposed in the freezer compartment 37 is accommodated.

  Specifically, the wiring storage portion 52 is configured by a stepped portion 74 formed between the upper duct member 49a or the lower duct member 49b and the duct decorative plate 49c. The wiring storage portion 52 is configured to straddle the seal connection surface portion 49d between the upper duct member 49a and the lower duct member 49b, leaving the recessed portion 56 for storing the water supply pipe 55, and the upper duct member 49a and the lower duct member 49b in front. The storage part 52 is formed in the inside. The outer peripheries of the upper duct member 49a and the lower duct member 49b are inclined so that the cross section of the connecting portion increases toward the seal connecting portion 49d. Specifically, the side surface portion of the upper duct member 49a has a divergent gradient shape (taper) from the upper surface portion toward the lower surface portion, and the side surface portion of the lower duct member 49b has a gradient that expands from the lower surface portion toward the upper surface portion. A shape (taper) is formed. For this reason, since the seal connecting surface portion 49d can ensure a large heat insulating wall thickness, the stepped portion 74 can be easily secured between the seal decorative surface portion 49d and the duct decorative plate 49c, and the space for the wiring storage portion 52 can be easily secured.

  The switching chamber 36 is provided with an upper drawer case 69 and a lower drawer case 70 that are open at the top and are movable in the front-rear direction. An upper discharge port 36a that discharges cold air to the switching chamber 36 is disposed above the upper surface opening 69a of the upper drawer case 69, and a lower discharge port 36b that opens to the duct device 49 and discharges cold air to the switching chamber 36 includes: It is formed above the upper surface opening 70 a of the lower drawer case 70 and between the bottom surface 69 b of the upper drawer case 69. Alternatively, the back wall 69c of the upper drawer case 69 may be inclined in the front direction of the lower drawer case 70 so that the lower discharge port 36b is provided at a position facing the back wall 69c. As a result, the back wall 69c serves as a guide for cool air to be discharged, and the cool air can be guided into the lower drawer case 70.

  Further, the connection surface portion 49d of the lower duct member 49b, which is a connection surface with the upper duct member 49a of the duct device 49, is configured at a position below the upper surface opening 70a of the lower drawer case 70 and above the bottom surface portion 70b. The lower drawer case 70 is configured at a position corresponding to the back wall 70c.

  An aluminum foil heater 57 is attached to the duct surface in the refrigerating room return duct 51a adjacent to the switching room return duct 51b of the duct device 49. The aluminum foil heater 57 controls energization of the heater when the switching chamber 36 is set to a refrigeration temperature zone where the temperature is lower than the refrigeration temperature zone or when the temperature is low outside air. This is because the cold air containing moisture after circulating through the refrigerator compartment 35 passing through the refrigerator compartment return duct 51a is higher in temperature than the cold air led to the switching chamber return duct 51b, so that the inside of the refrigerator compartment return duct 51a is cooled. In order to prevent condensation or freezing, the heater is energized to prevent freezing.

  The first partition wall 41 connected to the lower surface portion of the duct device 49 has a refrigerator compartment return communication port 58 communicating with the refrigerator compartment return duct 51a and a switching chamber return communication port 59 communicating with the switching chamber return duct 51b. Opened in the front-rear arrangement, the switching chamber return communication port 59 is provided on the front side, and the refrigeration chamber return communication port 58 is provided on the rear side so as to communicate with the cooling chamber 43. The first partition wall 41 is assembled at a predetermined position before foaming of the heat insulating box 31, and the heat insulation performance of the refrigerator is enhanced by using urethane filled in the heat insulating box 31 for fixing the first partition wall 41. .

  Specifically, the first partition wall 41 covers a first partition wall 41a formed of foamed polystyrene, a first upper surface partition cover 41b that covers the upper surface of the first partition wall 41a, and a lower surface of the first partition wall 41a. The first lower surface section cover 41c is formed. The first partition wall 41 is fixed to the heat insulating box 31 by filling urethane between the first upper surface partition cover 41 b and the first lower surface partition cover 41 c. In addition, an aluminum foil heater 41d is attached to the upper surface of the first partition wall 41, and when the switching chamber 36 is set to a refrigeration temperature zone, the aluminum foil heater 41d is energized to achieve an appropriate temperature.

  The cover coil 45 is provided side by side with the cooler 44 and is formed with a cool air return passage 71 partitioned by the cooler 44, the partition member 75, and the back wall of the cooling chamber 43. Cold air that has passed through the refrigerator compartment return communication port 58 and the switching chamber return communication port 59 of the wall 41 is introduced. The cool air return passage 71 is formed on the side of the cooler 44 by the partition member 75, and the upstream side of the cool air return passage 71 is in communication with the first partition wall 41 so as to communicate with the return air in the refrigerator compartment and the switching chamber. In the embodiment, there is a diversion duct 76 connected to the switching chamber return communication port 59 so that the switching chamber return cold air is diverted with the refrigeration chamber return cold air. Is formed. In the case of the embodiment, the shunt duct 76 is formed only on the upstream side, and the cold room return cold air and the switching room return cold air are merged from the middle.

This is because when the cold air that has passed through the switching chamber return duct 51 b and the cold air that has passed through the cold room return duct 51 a merge through the cold air return passage 71, the first compartment wall 41 switches to the cold room return communication port 58. Cold air flows backward through the room return communication port 59, and the cold room return cold air having a temperature higher than that of the switching room return cold air rises through the switching room return communication port 59 and flows back from the switching room return port 36c to the switching room 36. As a result, the switching chamber 36 cannot be efficiently cooled to an appropriate temperature, and condensation or the like occurs.

  Therefore, the cool air is divided into the upstream portion of the cool air return passage 71 so as not to be mixed. Therefore, the trap function that prevents the cold air that has passed through the refrigerating chamber return duct 51a from flowing downward, backflowing to the switching chamber return communication port 59, and backflowing from the switching chamber return port 36c of the duct device 49 into the switching chamber 36 is prevented. Therefore, it acts as a backflow prevention duct.

  The shunt duct 76 is formed only in the upstream portion in order to secure the opening area of the return passage 71, but may be formed to extend to the downstream portion as long as the downstream opening area of the return passage 71 can be secured.

  Further, a cold air return port 77 through which the cold air passing through the cold air return passage 71 returns to the lower part of the cooler 44 is provided, that is, the cold air return port 77 is open to the lower end portion 75 a of the partition member 75. The end of the defrost heater 47 disposed substantially horizontally below the cooler 44 is a projection surface, protrudes from one end of the cooler 44, passes through the cool air return port 77, and extends into the cool air return passage 71. Arranged.

  As a result, it is possible to prevent the chilled air in the cold air return passage 71 from being cooled by the cool air in the cooler 44 or the freezer compartment and freezing in the cold air return passage 71.

  Further, the cover coil 45 is provided with a fan 46 and a cold air discharge port 72 for sending cold air to the refrigerating chamber 35 and the switching chamber 36, and a cold air discharge port 72 is formed between the fan 46 and the cold air return passage 71. A partition member 75 is formed between 72 and the cool air return passage 71.

  Next, the refrigerator compartment 35 will be described.

  The refrigerator compartment 35 is divided into a plurality of upper and lower compartments by a plurality of shelves 61, and the refrigerator compartment air duct 48 a configured on the back surface of the refrigerator compartment 35 is formed in the vertical direction behind the plurality of shelves 61 and corresponds to each shelf 61. The refrigerator discharge port 62 is open. The refrigerating room air duct 48a may be formed with a branch path 63 that branches left and right in the space of the refrigerating room 35. By providing the branch path 63, the temperature distribution in the space in the width direction of the refrigerating room 35 is made uniform. can do.

  A vegetable compartment 64 is formed in the lower part of the refrigerator compartment 35. The vegetable compartment 64 has an open / close lid 64a on the front surface, and a vegetable case 64b that can be pulled out in the front-rear direction. In addition to such a configuration, the vegetable compartment 64 may have a box case 65 that has an opening on the top surface and can be sealed with a top cover.

  Further, the vegetable compartment 64 may be configured according to the full width dimension of the refrigerator compartment 35. However, in the present embodiment, the vegetable compartment 64 is configured with a dimension smaller than the full width dimension of the refrigerator compartment 35, and A water supply tank 53 for storing water for automatic ice making is detachably stored on the side. A water supply pipe 55 connected to the water supply tank 53 extends from the refrigerator compartment 35 to the freezer compartment 37 through the switching chamber 36. The water in the water supply tank 53 is sucked up by a motor (not shown) and guided into the water supply pipe 55.

The switching chamber 36 can be set to a freezing temperature zone, and the water in the water supply pipe 55 may be frozen. For this reason, an anti-freezing heater (not shown) is wound around the outer periphery of the water supply pipe 55, and the water supply pipe 55 is disposed between the inner box 33 and the duct device 49.
And the water supply pipe 55 is embedded in the recess 56 for heat insulation. In addition, the wiring storage section 52 that stores the wiring and connectors of the damper device 50 may be stored by providing the storage section 52 on the back surface of the duct device 49.

  By forming the recess 56 and the storage portion 52, the storage space in the front-rear direction necessary for the water supply pipe 55 and the wiring storage portion 52 can be reduced, and the internal volume of the switching chamber 36 can be secured. Moreover, since the recessed part 56 and the wiring accommodating part 52 are comprised by the other side so that it may not wrap to the part in which the refrigerator compartment ventilation duct 48a of the duct apparatus 49, the switching chamber ventilation duct 48b, and the refrigerator compartment return duct 51a are formed. , Prevent impairing thermal insulation.

  Further, a control board 66 for controlling the entire refrigerator 30 is arranged at a position corresponding to the back surface of the switching chamber 36 in the outer box 32.

  A refrigerator temperature sensor 67 for detecting the temperature of the refrigerator compartment 35 is installed in the refrigerator compartment return port 35b, and a switching chamber temperature sensor 68 for detecting the temperature of the switching chamber 36 is installed in the switching chamber return port 36c. .

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

  A part of the cold air generated by the cooler 44 in the cooling chamber 43 is forcibly blown forward by the fan 46, the freezing chamber 37 is cooled by the cold air discharged from the discharge port of the cover coil 45, and the cold air is covered by the cover coil 45. The air is guided to the lower part of the cooler 44 through a return port opened at the lower part of the heat exchanger, heat exchanged by the cooler 44, and fresh cold air is again circulated by the fan 46. As a result, the freezer compartment 37 is cooled to an appropriate temperature under the control of a freezer sensor (not shown).

  The cool air discharged above the fan 46 is guided from the cool air discharge port 72 of the cover coil 45 through the communication hole of the first partition wall 41 to the duct device 49. When the room temperature is equal to or higher than the set temperature by the cold room temperature sensor 67, the cold air discharged to the cold room 35 opens the cold room damper 50a of the damper device 50, passes through the cold room air duct 48a, and discharges the cold room. Cold air is discharged from 35a to cool the room. The circulated cold air is guided to the return port 35b, becomes air having moisture contained in the air in the refrigerating chamber 35 and the stored material, passes through the refrigerating chamber return duct 51a of the duct device 49, and the cover coil 45 and the cooling chamber. Through the cool air return passage 71 constituted by the back wall 43 of the gas 43, the cool air return port 77 leads to the lower part of the cooler 44 to exchange heat with the cooler 44, and fresh cool air is forcibly blown by the fan again. Is done.

  Thus, even if the refrigerator compartment 35 is located away from the cooler 44, the fan 46 forcibly blows cool air to the refrigerator compartment air duct 48 a communicating with the cooler 44, and the refrigerator compartment air duct in the duct device 49 is forced. Cold air is discharged to the refrigerating room 35 through 48a, and the opening and closing of the refrigerating room damper 50a is controlled by the refrigerating room temperature sensor 67, so that the room can be controlled to the set temperature.

The cool air discharged into the switching chamber 36 opens the switching chamber damper 50b of the damper device 50 when the indoor temperature is equal to or higher than the set temperature by the switching chamber temperature sensor 68, passes through the switching chamber air duct 48b, and enters the upper drawer case 69. The cool air is discharged from the discharge port 36a of the switching chamber provided at a position higher than the upper surface opening of the gas, the cool air is introduced into the upper drawer case 69, and the discharge port provided at a position higher than the upper surface opening of the lower drawer case 70 Cold air is discharged from 36 b, and the back wall of the upper drawer case 69 acts as a guide for regulating the flow of the cold air to introduce the cold air into the lower drawer case 70. The cold air circulated in the switching chamber 36 is guided to the return port 36 c, passes through the switching chamber return duct 51 b, passes through the switching chamber return communication port 59, and passes through the shunt duct 76 formed in the cover coil 45, thereby returning to the cold air return port. 77 is led to the lower part of the cooler 44 to exchange heat with the cooler 44, and the cold air after the heat exchange is forcibly blown by the fan again.

  As a result, even if the switching chamber 36 is located away from the cooler 44, the fan 46 forcibly blows cool air to the switching chamber air duct 48 b communicating with the cooler 44 and passes through the duct device 49 to switch the switching chamber 36. Since the cool air is discharged to 36 and the switching chamber temperature sensor 68 controls the opening and closing of the switching chamber damper 50b, the room can be controlled to the set temperature.

  In the duct device 49, a refrigerating room air duct 48a, a switching room air duct 48b, and a refrigerating room return duct 51a extend in the vertical direction and are arranged side by side. The switching room return duct 51b is disposed in front of the refrigerating room return duct 51a. Forming.

  Therefore, the refrigerating room air duct 48 a and the switching room air duct 48 b are provided at substantially the center position in the width direction of the duct device 49, and the refrigerating room return duct 51 a and the switching room return duct 51 b are arranged in front and rear with respect to the heat insulating box 31. Since the water supply pipe 55 and the wiring storage section 52 connected to the water supply tank 53 are arranged on the other side, the distance between the duct device 49 serving as an invalid space behind the switching chamber 36 and the inner box 33 is reduced. Therefore, a large depth dimension of the switching chamber 36 can be secured.

  Further, since the refrigerating room air duct 48a is formed in a substantially vertical direction from the inside of the duct device 49 of the switching room 36 to the branch path 63 in the refrigerating room 35, the air path resistance in the duct is reduced and the refrigerating room is reduced. The air volume to 35 can be secured.

  Also, the foam insulating material 34 is filled so that the first partition wall 41 and the second partition wall 42 are formed in the heat insulating box 31, and then the switching chamber between the first partition wall 41 and the second partition wall 42. By arranging the duct device 49 on the back surface of 36, the duct configuration of the switching chamber 36 can be easily formed.

  The switching chamber 36 can switch the set temperature from a freezing temperature zone of −18 ° C. to a refrigeration temperature zone of 4 ° C., and this can be realized by controlling the opening rate of the switching chamber damper 50b according to the set temperature. .

  In particular, when the set temperature of the switching chamber 36 is set to a temperature range lower than the refrigeration temperature, the cool air discharged from the discharge ports 36a and 36b of the switching chamber is guided into the switching chamber return duct 51b through the return port 36c. Since the cold air passing through the refrigerating room return duct 51a has a higher temperature than the cold air passing through the switching room return duct 51b, there is a risk that condensation will occur on the duct surface of the refrigerating room return duct 51a. There is a possibility that the water will freeze, and there is a possibility that the dew condensation water will flow in the refrigerating room return duct 51 a and freeze in the return passage 71. For this reason, by operating the heater 57 stuck to the refrigerator compartment return duct 51a, it is possible to evaporate even if condensed water is generated, and to prevent freezing in the duct.

  Further, by distributing the cold air to the upstream portion of the cold air return passage 71 so as not to be mixed, the cold air that has passed through the refrigerating chamber return duct 51a does not flow downward but flows back to the switching chamber return communication port 59, and the duct device 49 A trap function that prevents backflow from the switching chamber return port 36c into the switching chamber 36, and acts as a backflow prevention duct. The cold room return cold air passes through the switching chamber return communication port 59 from the switching chamber return port 36c. Therefore, the switching chamber 36 can be efficiently cooled to an appropriate temperature, and condensation can be prevented.

  Moreover, since the edge part of the defrost heater 47 is a projection surface, it protrudes from the one end part of the cooler 44 and extends into the cold air return passage 71 through the cold air return port 77, Since the inside of the return passage 71 can be heated by heater heat, condensation and freezing can be improved and prevented, and reliability can be enhanced.

  The refrigerating room return duct 51a and the switching room return duct 51b communicate with the lower part of the cooler 44 through the freezing room 37 region having a temperature range lower than that of the switching room 36 and the refrigerating room 35. If the refrigerator compartment return duct 51a having the highest return cold air temperature is arranged at a position away from the freezer compartment 37, the inside of the refrigerator compartment return duct 51a is cooled to cause dew condensation, and further, the refrigerator compartment return duct 51a may be frozen. Can be reduced.

  Therefore, the switching chamber return duct 51b of the switching chamber 36 that can be set from a temperature close to the temperature of the freezer compartment 37 to a temperature close to the refrigerator compartment temperature is disposed in front of the refrigerator compartment return duct 51a, so that the inside of the refrigerator compartment feedback duct 51a is arranged. Condensation and freezing can be reduced.

  As described above, the refrigerator according to the present invention can also be applied to household or commercial refrigerators.

DESCRIPTION OF SYMBOLS 30 Refrigerator 35 Refrigeration room 36 Switching room 37 Freezing room 41 1st division wall 44 Cooler 45 Cover coil 46 Fan 47 Defrost heater 48 Blowing duct 48a Refrigeration room ventilation duct 48b Switching room ventilation duct 49 Duct apparatus 50 Damper apparatus 51a Refrigeration room Return duct 51b Switching room return duct 58 Refrigerating room return communication port 59 Switching room return communication port 71 Return passage 76 Dividing duct

Claims (8)

A refrigeration room at the top, a freezing room at the bottom, a switching room that can switch the temperature zone between the refrigeration room and the freezing room, a cooler that generates cool air behind the freezing room, and an upper part of the cooler A fan for forcibly blowing the generated cold air to each chamber, a blower duct for blowing cold air to the refrigerating chamber and the switching chamber, and a refrigerating chamber for returning the cool air discharged into the refrigerating chamber to the cooler In the refrigerator including a duct device that configures a return duct behind the switching chamber, the air blowing duct sends a cold air to the refrigerating chamber, and a switching chamber air duct that blows the cold air to the switching chamber. And the duct device is configured such that the cold room air duct, the switching room air duct, and the cold room return duct are arranged side by side. 2. The refrigerator according to claim 1, wherein a damper device for adjusting the amount of cold air to the refrigerator compartment and the switching chamber is embedded in the duct device. The refrigerator according to claim 1, further comprising a return port communicating with a switching chamber return duct for returning cool air blown into the switching chamber to the cooler at a lower portion of the duct device. The refrigerator according to any one of claims 1 to 3, further comprising a heater that is energized according to a set temperature range of the switching chamber, and the heater is attached in a refrigerating chamber return duct of the duct device. The refrigerator according to claim 3, wherein the refrigerating room return duct and the switching room return duct are independently configured in the front-rear direction of the duct device, and the switching room return duct is disposed in front and the refrigerating room return duct is disposed in the rear. A first compartment wall that divides the switching chamber and the freezer compartment vertically, and when a duct device is connected to the compartment wall, the refrigerator compartment return communication port that communicates with the refrigerator compartment return duct, and the switch that communicates with the switch room return duct. 6. The refrigerator according to claim 5, wherein a room return communication port is opened in the front-rear position on the first partition wall. A cover coil is provided for covering the cooler of the cooling chamber and partitioning the freezing chamber and the cooling chamber. The cover coil communicates with the first partition wall, and returns the return cold air passing through the refrigerator compartment return communication port and the switching chamber return communication port. 7. The refrigerator according to claim 6, further comprising a return passage leading to a lower portion of the cooler, wherein the return passage forms a diversion duct for diverting the return cold air from the refrigerator compartment and the return cold air from the switching chamber at least upstream. Provided below the cooler and formed on the defrost heater for defrosting frost and ice adhering to the cooler, the cover coil covering the cooler and the defrost heater, and the cover coil, to the cooler The refrigerator according to claim 7, further comprising a cold air return passage that communicates, wherein the defrost heater is disposed on the projection surface so as to extend from one end of the cooler into the cold air return passage.