JP5617669B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator having a 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 cool air generated by the cooler 101 installed on the back of the main body is blown out from the discharge air passage 105 on the back surface of the freezing chamber 109 by the fan 102 and stored. It is configured to cool foods. 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. Circulation through the return duct 108 and the cooler 101 is performed. Further, the cold air generated by the cooler 101 is discharged by the fan 102 through the cold air discharge air passage 105 to a refrigerating room (not shown) above the freezing room 109. A mechanism has been proposed in which the cool air discharged to the refrigerator compartment circulates in the refrigerator compartment and then returns to the cooler 101 through the cool air return passages 104 arranged next to the cooler 101 (for example, Patent Document 1). reference).

JP-A-11-94449

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

  Furthermore, since the cooler 101 and the cool air return passage 104 are disposed side by side, the width of the cooler 101 cannot be increased, and thus 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. Reducing the cooling capacity by reducing the cooling capacity, and since the width of the cooler can be maximized because it is not necessary to use the width of the storage room for the cool air return passage, the cooling capacity should be improved. You can also.

  In addition, by increasing the width of the cool air return passage, the thickness required to secure the area required for the return passage is reduced, making it easy to ensure the size of the insulation wall thickness, and improving the energy efficiency of the cooling structure with area efficiency. it can.

  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.

The longitudinal cross-sectional view of the refrigerator in Embodiment 1 of this invention Schematic front view of the freezer basic structure in Embodiment 1 of the present invention 1 is a schematic longitudinal sectional view of a basic structure of a freezer compartment in Embodiment 1 of the present invention. Front view of freezer basic structure in Embodiment 1 of the present invention FIG. 3 is an assembly diagram of a return path constituent member according to the first embodiment of the present invention. Schematic front view of the freezer basic structure in Embodiment 2 of the present invention Schematic of longitudinal section of freezer basic structure in Embodiment 3 of the present invention Schematic of the front of the basic structure of the freezer compartment of a conventional refrigerator Sectional view of the basic structure of a freezer compartment of a conventional refrigerator Plan sectional view of the basic structure of a freezer in a conventional refrigerator

  1st invention is the storage box in which the heat insulation box formed with the inner box, the outer box, and the heat insulating material with which the said inner box and the said outer box were filled, and the said heat insulation box differ in a temperature zone 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 forced air circulation by the fan. It is possible to provide a refrigerator in which the temperature can be prevented from leaking heat, the refrigeration capacity is prevented from being lowered, and the power consumption is reduced.

  The second invention is characterized in that a return passage is provided on the back surface of the cooler, whereby the return passage is sandwiched between the outside air through the heat insulating wall and the cooler having the lowest temperature in the storage chamber. Since it circulates, the 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 and can be thinned. Therefore, the reduction | decrease of the foam heat insulating material filling part by comprising a return channel | path 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.

  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 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 path constituting member according to the first embodiment of the present invention. It is.

  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. The foam insulation material 34 is filled and insulated from the surroundings, and is divided into a plurality of storage chambers.

  The plurality of storage rooms have a refrigeration room 35 at the top, a vegetable room 36 at the bottom of the refrigeration room 35, and a freezing room 37 at the bottom.

  A refrigerator compartment door 38 is opened at the front opening of the refrigerator compartment 35, a vegetable compartment door 39 is opened at the front opening of the vegetable compartment 36, and a freezer compartment door 40 is opened and closed at the front opening of the freezer compartment 37. It is freely pivoted.

  The refrigerator compartment 35 is normally set to 1 ° C to 5 ° C at the lower limit of the temperature at which it is not frozen for refrigerated storage, and the vegetable compartment 36 can be set to 3 to 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.

  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 board and a polystyrene foam material.

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

  The communication hole 73 is arranged on the lower side of the cooler 44. If the communication hole 73 is on the upper side, the cold air that has passed through the vegetable compartment 36 passes through the cold air return passage 71 and passes from the communication hole 73 to the cooler. When the merging is performed at the upper part or the middle point, the vegetable room return cold air having a temperature higher than that of the cooler 44 is not efficiently cooled by the cooler 44 but is circulated again by the fan 46. Therefore, the communication hole 73 is arranged in the lower part.

  The cover coil 45 disposed in the freezer compartment 37 is disposed in front of the cooler 44, and sends cool air to the fan 46, the cool air discharge port 75 that sends cool air to the refrigerator compartment 35 and the vegetable compartment 36, and the freezer compartment 37. A cold air discharge port 75 and a freezer compartment return port 77 are provided. 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 connecting duct 78.

  The cool air return passage 71 has a width larger than the projected area of the cooler 44, and the return passage constituting member 74 and the inner box 33 constitute a space in the passage. The return openings 79 of the vegetable compartment disposed on the back of the vegetable compartment 36 are provided on both the left and right sides, and a return passage connection duct 72 is connected to the inner box 33 around the return opening 79. The return passage connection duct 72 is connected to a hole provided in the cold 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 this hole 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, the hole 71b for letting the wiring for driving the electrical component in a storage chamber pass is also provided, and it is utilized similarly to 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 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. It is led to the lower part of the cooler 44 through the freezer return opening 77 opened at the lower part of the air, and heat is exchanged by the cooler 44, and fresh cold air is circulated again by the fan 46. 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.

  The cool air discharged above the fan 46 is discharged from the cool air discharge port 75 of the cover coil 45 to the refrigerator compartment 35 and the vegetable compartment 36 through the discharge connection duct 78 in the first partition wall 41. The circulated cold air is guided to the return port 79, becomes air in the refrigerator compartment 35 and the vegetable compartment 36, and humid air contained in the stored material, passes through the cold air return passage 71 and from the communication hole 73 to the cooler 44. It is guided to the lower part and exchanges heat with the cooler 44, and fresh cool air is forced to be blown again by the fan.

  Thereby, even if the refrigerator compartment 35 and the vegetable compartment 36 are in the position away from the cooler 44, the cold air is forcibly blown by the fan 46, and the refrigerator compartment 35 and the vegetable compartment are passed through the air duct of the refrigerator compartment and the vegetable compartment. The cool air is discharged to 36, and the room can be cooled to a set temperature.

  In addition, 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, thereby diverting the return cold air to fresh cold air heat-exchanged by the cooler 44. I try not to mix them.

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

  In addition, the cool air cooled by the cooler 44 spreads to the periphery thereof by heat transfer, but is constituted by a return passage constituting member 74 and the inner box 33 on the back surface of the cooler 44 via the inner box 33, The cool air return passage 71, which is a space having a width 71a larger than the width 44a of the projected area, is provided from the cooler 44 when the return cool air in the refrigerator room 35 or the vegetable room 36 is led from the communication hole 73 to the lower part of the cooler 44. The leaked cold air is absorbed, cooled again by the cooler 44, and discharged to each storage chamber. As a result, the amount of power consumption can be reduced by returning the cool air of the cooler 44 that leaks heat to the outside air to the cooler 44 by forced sending in the conventional configuration.

(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 merges in the cold air return passage 71, is led to the lower part of the cooler 44 through the communication hole 73, and exchanges heat with the cooler 44. It is forced by the fan.

  As a result, the return cold air from the refrigerating room 35 can reach the cold air return passage 71 without passing through the vegetable room 36, so that independent temperature control of the refrigerating room 35 and the vegetable room 36 is possible.

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

  As shown in the figure, the cool air return passage 71 is disposed on the back surface of the cooler 44, and is constituted by the return passage constituting member 74 and the inner box 33 on the storage chamber side of the inner box 33. The return passage constituting member 74 is fixed in the freezer compartment 37 by fitting screws or claws, and the opposite surface of the cold air return passage 71 has a shape for fixing the cooler 44, the fan 46, electrical parts, and the like. ing. 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 Heat insulation box 32 Outer box 33 Inner box 34 Foam insulation (heat 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 (5)

A heat insulating 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 partition wall that divides the heat insulating box into upper and lower storage chambers in different temperature zones. And a refrigerator that generates cool air for cooling the storage room, and a cold air return passage from the storage room located above the cooler,
The refrigerator, wherein the cool air return passage has a width larger than a width of a 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 provided with a passage space by a return passage constituting member and an inner box. The refrigerator according to any one of claims 1 to 3, wherein the cold air return passage is embedded in a heat insulating material between an inner box and an outer box. The refrigerator according to any one of claims 1 to 4, wherein the cold air return passage includes a hole under communication between the space in the cold air return passage and the storage chamber.