WO2012105250A1

WO2012105250A1 - Refrigerator

Info

Publication number: WO2012105250A1
Application number: PCT/JP2012/000669
Authority: WO
Inventors: 愼一堀井; 西村　晃一; 克則堀井
Original assignee: パナソニック株式会社
Priority date: 2011-02-01
Filing date: 2012-02-01
Publication date: 2012-08-09
Also published as: CN103339454B; BR112013019367A2; BR112013019367B1; CN103339454A; JP5617669B2; JP2012159239A

Abstract

A refrigerator (30) comprises the following: a main container body (31); a partition wall (42) that vertically partitions the main container body (31) and forms a plurality of storage chambers each of which has a different temperature zone; a cooler (44) that generates cold air for cooling the storage chambers; and a cold air passage (71) that returns cold air from the storage chamber positioned above the cooler (44). The cold air return passage (71) is wider than the projected area of the cooler (44).

Description

refrigerator

The present invention relates to a refrigerator with high energy saving effect.

FIG. 8 is a front view of the basic structure of a freezer compartment of a conventional refrigerator, FIG. 9 is a cross-sectional view of the basic structure of a freezer compartment of a conventional refrigerator, and FIG. 10 is a plan sectional view of the basic structure of the freezer compartment of a conventional refrigerator. .

As shown in FIGS. 8, 9, and 10, the refrigerator blows out the cold air generated by the cooler 101 installed on the back of the main body from the discharge air passage 105 on the back of the freezing chamber 109 into the cabinet by the fan 102. It is configured to cool foods that have been. The cold air that cools the food reaches the front upper part of the freezer compartment 109 as shown by the arrow, and the space between the inner wall surface of the door 110 and the front surface of the storage case, and the space between the bottom surface of the storage case and the bottom wall of the storage chamber. And return from the return duct 108 to the cooler 101. As described above, the cold air circulates. The cool air generated by the cooler 101 is discharged by the fan 1 02 through the cool air discharge air passage 105 to the refrigerating room (not shown) above the freezing room 109. The cool air discharged to the refrigerator compartment passes through the refrigerator compartment, and then returns to the cooler 101 through the cool air return passages 104 arranged alongside the cooler 101. A refrigerator including a mechanism for circulating cold air as described above has been proposed (see, for example, Patent Document 1).

JP 11-94449 A

However, the above-described conventional configuration has a problem in that heat exchange between the cooler 101 having the lowest temperature in the refrigerator and the outside air through the heat insulating wall 111 cannot be suppressed, resulting in a heat leak and cooling efficiency.

Furthermore, since the cooler 101 and the cool air return passage 104 are arranged side by side, the width of the cooler 101 cannot be increased, and there is a problem that the cooling capacity is lowered.

In order to solve the above-mentioned conventional problems, the refrigerator of the present invention is provided with a cold air return passage having a width larger than the width of the projected area of the cooler, so that the heat leak from the cooler can be caused by air circulation. It will be reduced. Thereby, the fall of the refrigerating capacity of a refrigerator can be suppressed. Further, since it is not necessary to use the width of the storage chamber for the cold air return passage, the width of the cooler can be maximized. As described above, the cooling capacity of the entire refrigerator can be improved.

Furthermore, by increasing the width of the cool air return passage, the thickness for securing the area required for the return passage is reduced, and the insulation wall thickness can be easily secured. Therefore, it can be set as the structure of a refrigerator with efficient area efficiency, and can improve energy-saving property.

The refrigerator of the present invention can provide a refrigerator that suppresses heat leakage to the outside of the cooler, improves cooling efficiency, and reduces power consumption.

FIG. 1 is a longitudinal sectional view of the refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a schematic front view of the freezer basic structure according to Embodiment 1 of the present invention. FIG. 3 is a schematic vertical cross-sectional view of the freezer basic structure according to Embodiment 1 of the present invention. FIG. 4 is a front view of the freezer basic structure according to Embodiment 1 of the present invention. FIG. 5 is an assembly diagram of the return path constituting member according to the first embodiment of the present invention. FIG. 6 is a schematic front view of the freezer basic structure according to Embodiment 2 of the present invention. FIG. 7 is a schematic longitudinal sectional view of the basic structure of the freezer compartment according to Embodiment 3 of the present invention. FIG. 8 is a schematic front view of a basic structure of a freezer compartment of a conventional refrigerator. FIG. 9 is a cross-sectional view of a basic structure of a freezer compartment of a conventional refrigerator. FIG. 10 is a plan sectional view of a basic structure of a freezer compartment of a conventional refrigerator.

A first invention is a main box formed by an inner box, an outer box, and a heat insulating material filled between the inner box and the outer box, and the storage box having a different temperature range for the main box. In a refrigerator comprising: a partition wall for vertically partitioning; a refrigerator that generates cool air for cooling the storage chamber; and a return passage from the storage chamber located above the cooler. The return passage has a width larger than the width of the projected area of the cooler.

As a result, the heat leak from the cooler is absorbed by the cool air in the return passage, and the cool air in the return passage can be returned to the cooler again by the air passage forcedly circulated by the fan. It is possible to provide a refrigerator that can suppress heat leakage at a low temperature, suppress a decrease in refrigerating capacity, and reduce power consumption.

The second invention is characterized in that a return passage is provided on the back surface of the cooler, so that the return passage is sandwiched between the outside air via the heat insulating wall and the cooler having the lowest temperature in the storage chamber. Since the path is formed, heat leak to the outside air of the cooler can be suppressed, and the power consumption can be reduced more effectively.

According to a third aspect of the present invention, the return passage is embedded in a heat insulating material between the inner box and the outer box, so that heat leakage from the cold air in the return passage to the storage chamber and the outside air in different temperature zones is suppressed by the heat insulating material. In addition, power consumption can be reduced.

The fourth invention is characterized in that the return passage is provided with a passage space by a return passage constituting member and an inner box, so that the return passage constituting member can be easily molded. Further, the thickness can be reduced. By the above, the reduction | decrease of the foam heat insulating material filling part by comprising a return channel can be suppressed, and the heat insulation capability of a cooler back wall can be improved.

According to a fifth aspect of the present invention, the return passage is provided with a hole below the cooler in which the space in the return air passage communicates with the storage chamber, so that the cooling absorbed in the return passage is provided. Since the heat leak from the cooler can be returned to the lower side of the cooler without flowing into the outside air or the storage chamber and cooled again by the cooler, the loss due to the heat leak can be suppressed and the power consumption can be reduced. *

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the same reference numerals are given to the same configurations as those of the conventional examples or the embodiments described above, and detailed description 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 schematic front view of a freezer basic structure according to Embodiment 1 of the present invention, and FIG. 3 is Embodiment 1 of the present invention. FIG. 4 is a front view of the basic structure of the freezer compartment according to the first embodiment of the present invention, and FIG. 5 is an assembly diagram of the return passage constituting member according to the first embodiment of the present invention. It is.

In FIG. 1, a main box body 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 the inside thereof includes, for example, hard foamed urethane as a heat insulating material. The foam insulation material 34 is filled. Thus, the inside of the refrigerator 30 is insulated from the surroundings. In addition, the refrigerator 30 of the present embodiment is divided into a plurality of storage rooms.

The plurality of storage rooms are divided into a refrigerator room 35, a vegetable room 36, and a freezer room 37. Inside the refrigerator 30, the refrigerator room 35 is at the top, the vegetable room 36 is at the bottom of the refrigerator room 35, and the A freezer compartment 37 is arranged in the lower part.

A cold room door 38 is pivotally supported at the front opening of the cold room 35 so as to be freely opened and closed. A vegetable room door 39 is pivotally supported at the front opening of the vegetable room 36 so as to be freely opened and closed. A freezer compartment door 40 is pivotally supported at the front opening of the freezer compartment 37 so as to be freely opened and closed.

The refrigerator compartment 35 is usually set to 1 ° C. to 5 ° C. at the lower limit of the temperature for freezing for refrigerated storage. The vegetable room 36 can be set up to 3-8 ° C. 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.

Moreover, the vegetable compartment 36 and the freezer compartment 37 are divided up and down by the 1st partition wall 41 which is a partition wall, and the refrigerator compartment 35 and the vegetable compartment 36 are divided up and down by the 2nd partition wall 42 which is a partition wall. Yes.

Further, a cooling chamber 43 for generating cold air is provided on the back surface of the freezing chamber 37. A cooler 44 is disposed inside the cooling chamber 43. The cooling chamber 43 is partitioned from the freezing chamber 37 by a cover coil 45 in a heat insulating state. A fan 46 that forcibly blows cool air generated above the cooler 44 is disposed. Below the cooler 44, a defrost heater 47 that defrosts frost and ice adhering to the cooler 44 is provided.

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 board and a polystyrene foam material.

The cold air return passage 71 is disposed on the back surface of the cooler 44 and is embedded in a heat insulating space filled with the foam heat insulating material 34. The upstream side of the cold air return passage 71 is connected to the vegetable compartment 36 located above the first partition wall 41 by a return passage connection duct 72. The cold air return passage 71 includes a communication hole 73 opened in the inner box 33. With the above configuration, the cold air return passage 71 is configured such that the vegetable room return cold air and the freezer room return cold air merge.

The communication hole 73 is disposed below the cooler 44. This is because if the communication hole 73 is on the upper side of the cold air return passage 71, the cold air that has passed through the vegetable compartment 36 passes through the cold air return passage 71 and merges from the communication hole 73 at the upper part of the cooler or at an intermediate point. Become. And it is for avoiding that the vegetable room return cold air whose temperature is higher than the cooler 44 is not efficiently cooled by the cooler 44 and is circulated again by the fan 46. Therefore, the communication hole 73 is disposed in the lower part of the cool air return passage 71 to cause a decrease in cooling capacity.

The cover coil 45 disposed in the freezer compartment 37 is disposed in front of the cooler 44. The cover coil 45 is provided with a fan 46, a cold air outlet 75 for sending cold air to the refrigerator compartment 35 and the vegetable compartment 36, a cold air outlet 75 for sending cold air to the freezer compartment 37, and a freezer return port 77. . The cool air discharged from the cool air discharge port 75 of the cover coil 45 constitutes a passage through which the cool air is sent to the refrigerator compartment 35 and the vegetable compartment 36 by the discharge connection duct 78.

Further, the cool air return passage 71 has a width larger than the width of the projected area of the cooler 44 (width of the cooler 44). Specifically, the cool air return passage 71 is constituted by a return passage constituting member 74 and an inner box 33. The return openings 79 of the vegetable compartment arranged on the back of the vegetable compartment 36 are provided on both the left and right sides of the inner box 33 inside the refrigerator 30. The return port 79 is connected to the passage connection duct 72. The return passage connection duct 72 is connected to a hole provided in the cool air return passage 71.

The cold air return passage 71 is also provided with a hole 71a for passing a pipe connected to the cooler 44, and the pipe passed through the hole 71a is connected to the cooler 44 by welding or the like. A convex shape 71c is provided on the foam insulation insulating material filling side opposite to the space of the cold air return passage 71, and the front, rear, left and right positions of the pipe are regulated.

Moreover, a hole 71b is also provided for passing wiring for driving the electrical components in the storage chamber. The hole 71b is used similarly to the relationship of the hole 71a with respect to the piping. The cold air return passage 71 is also provided with a screw fixing hole, a claw shape for fitting parts, and the like, so that the cooler fixing part 80 for fixing the cover coil 45 and the cooler 44, the wiring storage part 81, and the like are stored. Used for fixing indoor parts.

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 freezer compartment 37 is cooled by the cold air discharged from the discharge port of the cover coil 45. The cold air that has finished cooling the freezer compartment 37 is guided to the lower part of the cooler 44 via the freezer return port 77 opened at the lower part of the cover coil 45, and heat is exchanged by the cooler 44. The cool air cooled again by the cooler 44 is forcibly blown by the fan 46. The cold air repeats the above circulation. As a result, the freezer compartment 37 is cooled to an appropriate temperature under the control of a freezer compartment sensor (not shown) so as to be maintained at the set temperature.

Further, the cold air discharged above the fan 46 is discharged from the cold air discharge port 75 of the cover coil 45 through the discharge connection duct 78 in the first partition wall 41 to the refrigerator room 35 and the vegetable room 36. The cold air that has cooled the vegetable compartment 36 and the like is guided to the return port 79. The cold air that has reached the return port 79 is cold air that is dampened by the air and stored items in the refrigerator compartment 35 and the vegetable compartment 36. The cold air that has passed through the return port 79 passes through the cold air return passage 71 and is led from the communication hole 73 to the lower part of the cooler 44 and reaches the cooler 44. Then, the cold air exchanges heat with the cooler 44 and is forcibly blown by the fan 46 again.

Thereby, even if the refrigerator compartment 35 and the vegetable compartment 36 are located away from the cooler 44, the fan 46 is forced to cool and cool. Cold air that cools the refrigerator compartment 35 and the vegetable compartment 26 is discharged to the refrigerator compartment 35 and the vegetable compartment 36 through the air duct connected to the refrigerator compartment 35 and the vegetable compartment 36, and the inside of the refrigerator compartment 35 and the vegetable compartment 36 is set. Cool to temperature.

Further, a return passage connecting duct 72 connected to the return port 79 of the vegetable compartment 36 is connected to the upstream portion of the cold air return passage 71. As a result, the return cold air and the fresh cold air heat-exchanged by the cooler 44 are divided to prevent the return cold air and the fresh cold air from being mixed.

Also, since the defrost heater 47 can heat the inside of the cold air return passage 71 with the heater heat at the time of defrosting, it can improve and prevent condensation and freezing and can increase reliability.

Also, the cold air cooled by the cooler 44 spreads around it by heat transfer. However, the cool air return passage 71 is disposed on the back surface of the cooler 44 via the inner box 33. In addition, the cool air return passage 71 is constituted by the return passage constituting member 74 and the inner box 33. Further, the cool air return passage 71 is a space having a width 71 a that is larger than the width 44 a of the projected area of the cooler 44. Therefore, when the return cold air in the refrigerator compartment 35 and the vegetable compartment 36 is guided from the communication hole 73 to the lower part of the cooler 44 by the cool air return passage 71, the cool air leaking from the cooler 44 is absorbed. As a result, it is possible to suppress heat leakage to the outside air through the main box 31 disposed behind the cooler 44. In addition, the amount of power consumption can be reduced by returning the cool air of the cooler 44 to the cooler 44 by forced sending.

(Embodiment 2)
FIG. 6 is a schematic front view of the freezer basic structure according to Embodiment 2 of the present invention.

As shown in the figure, one of the return passage connection ducts 72 connected to the cold air return passage 71 is connected from the return port 79 of the vegetable compartment 36, and the other is connected from the return port 79 of the refrigerator compartment 35. . The return cold air that has passed through the respective return passage connecting ducts 72 joins in the cold air return passage 71 and is led from the communication hole 73 to the lower portion of the cooler 44 to exchange heat with the cooler 44. Thus, the return cold air cooled by the cooler 44 is forcibly blown by the fan again.

Thus, since the return cold air from the refrigerator compartment 35 can reach the cold air return passage 71 without passing through the vegetable compartment 36, independent temperature control is possible for each of the refrigerator compartment 35 and the vegetable compartment 36.

(Embodiment 3)
FIG. 7 is a schematic front view of the freezer basic structure according to Embodiment 3 of the present invention.

As shown in the figure, the cold air return passage 71 is disposed on the back surface of the cooler 44. The cool air return passage 71 is constituted by a return passage constituting member 74 and an inner box 33 provided closer to the storage chamber than the inner box 33. The return passage constituting member 74 is fixed in the freezer compartment 37 by fitting screws or claws. The return passage constituting member 74 has a shape for fixing the cooler 44, the fan 46, electrical parts, and the like on the opposite surface of the cold air return passage 71. The return passage connecting duct 72 is connected to the inner box 33 on the back side of the vegetable compartment 36 and the inner box 33 on the back side of the freezer compartment 37, and the connecting portion is closely fixed so that cold air does not leak.

In addition, although embodiment of this invention was set as the structure of the three storage rooms of the refrigerator compartment 35 divided by the partition wall, the vegetable compartment 36, and the freezer compartment 37, this was divided | segmented into the storage compartment of two upper and lower rooms. The configuration may be four or more. The storage room located above the freezing room 37 may be the refrigerating room 35 and may be any storage room having a temperature range equal to or higher than the freezing room temperature range.

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

30 Refrigerator 31 Main box 32 Outer box 33 Inner box 34 Foam insulation (insulation)
35 Cold room 36 Vegetable room 37 Freezer room 41 1st partition wall (partition wall)
44 cooler 45 cover coil 46 fan 47 defrost heater 71 cold air return passage 72 return passage connection duct 73 communication hole 74 return passage constituent member 75 cold air discharge port 78 discharge connection duct

Claims

A main box formed by an inner box, an outer box, and a heat insulating material filled between the inner box and the outer box, and a plurality of storage chambers that divide the main box vertically and have different temperature zones In a refrigerator comprising: a partition wall that forms a cooler; a cooler that generates cool air that cools the storage chamber; and a cool air return passage from the storage chamber located above the cooler.
The refrigerator characterized in that the cold air return passage has a width larger than the width of the projected area of the cooler.
The refrigerator according to claim 1, wherein the cold air return passage is disposed on a back side of the cooler.
The refrigerator according to claim 1 or 2, wherein the cold air return passage is formed by providing a passage space by a return passage constituent member and the inner box.
The refrigerator according to any one of claims 1 to 3, wherein the cold air return passage is embedded in the heat insulating material between the inner box and the outer box.
The refrigerator according to any one of claims 1 to 4, wherein the cold air return passage includes a hole below the cooler in which a space in the cold air return passage and the storage chamber communicate with each other. .