JP6322805B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator provided with a cooling chamber configured to suck in return air that has cooled the freezer and refrigerator compartments from the front and side surfaces of the cooler.

  4 is a cross-sectional view of a conventional refrigerator, FIG. 5 is a cross-sectional view of a freezer compartment of a conventional refrigerator, and FIG. 6 is a front view of the freezer compartment of the conventional refrigerator.

  As shown in FIGS. 4, 5, and 6, the refrigerator 101 is formed of a heat insulating box, and includes a freezing room 102 that is maintained at a temperature around −20 ° C., a refrigerator room 103 that is maintained at a temperature around 5 ° C., and The cooler 104 and the cooling fan 105, which are configured on the back of the freezer compartment 102 and include, for example, a meandering pipe 104a and a plurality of vertically divided plate-like fins 104b provided so as to be orthogonal to the pipe, are accommodated. A cooling chamber 106 is provided, and the cool air generated by the cooler 104 is blown out from the freezing discharge air passage 107 on the back surface of the freezing chamber 102 into the freezing chamber 102 by the cooling fan 105, and the stored items stored therein are cooled. ing.

  The cold air that has cooled the stored material reaches the front upper part of the freezer compartment 102 as shown by the arrow, and the space between the inner wall surface of the door and the front surface of the storage case, the space between the bottom surface of the storage case and the bottom wall of the storage chamber, etc. Circulation through the refrigeration return air passage 108 to the cooler 104 is performed. Further, the cool air generated by the cooler 104 is discharged by the cooling fan 105 through the refrigeration discharge air passage 109 to the refrigeration chamber 103 configured above the freezer compartment 102. The cool air discharged to the refrigerator compartment 103 circulates in the refrigerator compartment and then circulates from the lower part of the side face of the cooler 104 to the cooler 104 through the refrigerator return passage 110 disposed on the side face of the cooler 104. Thus, the return air from the freezer compartment 103 flows from the lower part of the cooler 104 to the front side, and the return air from the refrigerator compartment 104 flows from the lower side to the rear side of the cooler 104 (for example, Patent Documents). 1).

Japanese Patent No. 3454102

  However, in the above-described conventional configuration, the door is opened and closed when the user puts in and out the stored item, and outside air having a higher humidity than the air in each room enters the interior, and the humidity of the return air increases. When the return air having high humidity passes through the cooler 104, moisture condenses and freezes in the cooler 104, and adheres as frost. If the door is opened and closed frequently, for example, when the humidity of the outside air is high, frost between the fins 104b grows, causing clogging, and the air flow by the cooling fan 105 is extremely reduced, resulting in a reduction in cooling performance. .

  The present invention solves the above-described conventional problems, and has an object to provide a refrigerator in which the area to which frost adheres is increased and the structure is not easily clogged even if frost adheres, and the cooling performance does not deteriorate. And

  Further, the opening / closing frequency of the door is generally higher in the refrigerator compartment 103 than in the freezer compartment 102, and the humidity of the return air from the refrigerator compartment 103 is higher. In the configuration of the conventional cooling chamber 106, the rear side of the lower part of the cooler is It tends to clog.

  This invention solves the said conventional subject, and it aims at providing the refrigerator which can maintain cooling performance, even when frost adheres.

In order to solve the above-described conventional problems, a refrigerator according to the present invention includes a refrigerator compartment in a refrigeration temperature zone, a freezer compartment in a refrigeration temperature zone, a cooling chamber provided in the freezer compartment, and a cooling housed in the cooling compartment. And a cooling fan, a refrigeration discharge air passage for discharging cool air from the cooling fan to the freezing chamber, and a refrigeration unit configured in front of the cooling chamber so as to suck the return air that has cooled the freezing chamber from the lower front of the cooler A return air passage, a refrigeration discharge air passage for discharging cold air from the cooling fan to the refrigerating chamber, and return air that has cooled the refrigerating chamber from the lower side from the center in the height direction of the cooler on the side surface of the cooler. A refrigeration return air passage configured on a side surface of the cooling chamber to be sucked, and a gap is formed between the cooling chamber and the cooler from a lower end of the cooler to above a center in a height direction of the cooler. Bypass wind On the front and back surfaces of the cooler, the cooler comprising fins and pipes divided in the vertical direction, and the upper end portion of the bypass air passage divided and independent of the height direction of the fins The return air from the freezer compartment flows through the bypass air passage on the front side of the cooler, the return air from the refrigerator compartment flows through the bypass air passage on the back side of the cooler, and The height dimension of the bypass air path on the back side of the cooler is larger than the height dimension of the bypass air path on the front side of the cooler, and the depth dimension of the bypass air path on the back side of the cooler is It is larger than the depth dimension of the bypass air passage on the front side .

  Thereby, the adhesion amount of frost increases between the fins of the cooler, it is possible to prevent clogging, and to suppress the cooling performance deterioration of the refrigerator.

  The refrigerator of this invention can prevent clogging of the frost between the fins of a cooler, can suppress a cooling performance fall, and can provide a refrigerator with high cooling performance.

Sectional drawing of the refrigerator in embodiment of this invention Sectional drawing of the cooling chamber of the refrigerator of the embodiment Front view of the cooling chamber of the refrigerator of the same embodiment Cross-sectional view of a conventional refrigerator Sectional view of the cooling chamber of a conventional refrigerator Front view of conventional refrigerator cooling chamber

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

(Embodiment 1)
FIG. 1 is a sectional view of a refrigerator in an embodiment of the present invention. FIG. 2 is a cross-sectional view of the cooling chamber of the refrigerator according to the embodiment. FIG. 3 is a front view of the cooling chamber of the refrigerator according to the embodiment.

  1 to 3, the refrigerator 1 is housed in the refrigerating room 3 in the refrigerating temperature zone, the freezing room 2 in the refrigerating temperature zone, the cooling room 11 disposed on the back of the freezing room 2, and the cooling room 11. A cooler 4, a cooling fan 5, a freezing discharge air passage 7 for discharging cool air from the cooling fan 5 to the freezing chamber 2, and a front surface of the cooling chamber 11 for sucking return air that has cooled the freezing chamber 2 from the lower front surface of the cooler 4. The refrigeration return air passage 8 configured as described above, the refrigeration discharge air passage 9 that discharges the cold air from the cooling fan 5 to the refrigeration chamber 3, and the return air that has cooled the refrigeration chamber 3 at the side of the cooler 4 is at the height of the cooler 4. A refrigerated return air passage 10 is provided on the side surface of the cooling chamber 11 so as to be sucked from below from the center of the direction.

  The cooling chamber 11 accommodates the cooler 4 and the cooling fan 5 therein, and forms an air passage so that the cooler 4 is sandwiched between the front wall 11a and the back wall 11b.

  Each of the front wall 11a and the back wall 11b has a front bypass air passage 12a and a rear bypass air passage 12b in which the upper portion is in close contact with the cooler 4 and the lower portion is spaced from the cooler 4, and is in close contact with each other. The boundary between the front surface, the front bypass air passage 12a, and the rear bypass air passage 12b (the upper end portion of the bypass air passage) is above the center in the vertical direction of the cooler 4 and the height of the divided one row of fins 4b. It is near the center in the vertical direction.

  Further, the height dimension Hb of the back bypass air passage 12b configured on the back wall 11b is set higher than the height dimension Ha of the front bypass air path 12a configured on the front wall 11a.

  Further, the depth dimension Db of the rear bypass air passage 12b is set larger than the depth dimension Da of the front bypass air passage 12a.

  Further, the position (height) of the inlet portion of the front bypass air passage 12a is set higher than the position (height) of the inlet portion of the rear bypass air passage 12b.

Further, the lower end of the refrigerated return air passage 10 and the lower end of the rear bypass air passage 12b are set at substantially the same height, and the lower end of the cooler 4 is also substantially the same height.

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

  During operation of the refrigerator 1, the cold air generated by the cooler 4 is sent by the cooling fan 5 through the freezing discharge air passage 7 and the refrigerating discharge air passage 9 to the freezing room 2 and the refrigerating room 3 to cool each room. . The cold air that has cooled each chamber is guided from the refrigeration return air passage 8 and the refrigeration return air passage 10 to the cooler 4 and is sent again to each chamber by the cooling fan 5, so that each chamber is circulated while circulating the cold air. Cool to a predetermined temperature.

  At this time, the water vapor contained in the return air condenses and freezes on the lower surface, which is the inlet of the cooler 4 having a low temperature, and adheres as frost. And if this frost grows, the clearance gap between the fins 4b of the cooler 4 will become narrow by frost, the pressure loss of an air path will become large, and the cold air by the cooling fan 5 will become difficult to flow into each chamber, and cooling performance will fall.

  Further, when the humidity of the outside air is high, the gap is closed when the humidity of the return air is further increased by opening and closing the door, and the cooling performance may be extremely lowered.

  However, in the present embodiment, the front bypass air passage 12a and the rear bypass air passage 12b are provided in more than half in the vertical direction of the cooler 4, so that the frost caused by the return air is not only the lower surface of the cooler 4, but also the refrigeration. The return air from the chamber 2 adheres to the front surface and the return air from the refrigerator compartment 3 also adheres to the back surface.

  Thereby, the area where frost adheres can be increased, and even if more frost adheres to the cooler 4, there is no pressure loss in the air passage, and the degree of allowance until it is blocked increases.

  Therefore, the cooling performance fall of a refrigerator can be suppressed and it can be set as a refrigerator with high cooling performance.

  In normal use, the user opens and closes more doors in the refrigerator compartment 3 than in the freezer compartment 2 by taking in and out stored items. Accordingly, the return air from the refrigerator compartment 3 tends to have a higher humidity than the return air from the freezer compartment 2, and the amount of frost on the back side of the cooler 4 is increased, which makes it easier to block.

  However, according to the present embodiment, the back bypass air passage 12b is higher in height and depth than the front bypass air passage 12a. Thereby, even if more frost adheres to the back surface bypass air passage 12b, it is difficult to block.

  Thereby, the area which frost adheres with respect to the return air from the refrigerator compartment 3 with much frost adhesion amount can be enlarged, and even if more frost adheres to the cooler 4, the pressure loss of an air path And the margin for closing is also increased.

  Therefore, the cooling performance fall of a refrigerator can be suppressed and it can be set as a refrigerator with higher cooling performance.

  Moreover, in this Embodiment, the cooler 4 is comprised by the pipe 4a and the fin 4b divided | segmented up and down provided so as to be orthogonal to piping.

  Generally, during the operation of the refrigerator, the fins 4b of the cooler 4 can be operated even for a long time by performing a defrosting operation in which frost attached to the cooler 4 is melted by, for example, a heat transfer heater (not shown). The gap is not blocked.

At this time, the water after the frost has melted tends to accumulate as water droplets at the lower ends of the fins 4b. In addition, when the front bypass air passage 12a and the rear bypass air passage 12b are configured, water droplets are likely to collect also at the corners of the upper ends thereof. In this configuration, when the lower end of the fin 4b and the upper end of the front bypass air passage 12a and the rear bypass air passage 12b are at the same height, the water droplet and the water droplet are combined to form a larger water droplet, and the cooler 4 is cooled by the cooling operation. When lowered, the water droplets freeze again, and the lower ends of the fins 4b are blocked by the ice.

  However, according to the present embodiment, the upper ends of the front bypass air passage 12a and the rear bypass air passage 12b are at a height near the center of the fin 4b, and the lower end of the fin 4b, the front bypass air passage 12a, and the rear bypass air passage The upper end of 12b does not become the same height.

  Thereby, the lower end of the fin 4b is not blocked by water droplets generated by the defrosting operation.

  Therefore, the cooling performance fall of a refrigerator can be suppressed and it can be set as a refrigerator with higher cooling performance.

  In this embodiment, the absolute value of the depth of the bypass air passage is not defined, but by making it narrower than the distance between adjacent fins, air can flow more easily through the cooler than the bypass air passage. The cooling performance when frost is not attached can be improved.

  In the present embodiment, the cooling method of the cooler is not defined, but the same effect can be obtained by any cooling method such as a refrigerant compression refrigeration cycle using a compressor or a Peltier method.

  Further, in the present embodiment, the description has been given of the refrigerator provided with the freezer compartment of the freezing temperature zone and the refrigerator compartment of the refrigerator temperature zone, but the door opening and closing frequency is higher even in the refrigerator provided with only a plurality of freezer compartments, for example. The same effect can be obtained by increasing the height and depth of the bypass air passage through which the return air from the storage room flows.

  Further, in this embodiment, the width of the bypass air passage has not been described, but by making the width of the bypass narrower than the width of the region with the fins, the return air flows only through the fin portion, and the cooling performance is improved. Can be increased.

  Further, in the present embodiment, the cooling chamber 11 is described as being arranged at the back of the freezing chamber 2, but the same effect is obtained in a cooling chamber having the same return air path configuration regardless of the height position of the cooling chamber 11. can get.

  INDUSTRIAL APPLICABILITY The present invention is a refrigerator provided with bypass air passages on the front side and the back side of the cooler, and can provide a refrigerator having high cooling performance against frost adhesion. It is useful as a refrigerator of various types and sizes.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Freezing room 3 Refrigeration room 4 Cooler 4a Piping 4b Fin 5 Cooling fan 7 Refrigeration discharge air path 8 Refrigeration return air path 9 Refrigeration discharge air path 10 Refrigeration return air path 11 Cooling room 12a Front bypass air path 12b Back surface bypass air Road

Claims (1)

A refrigeration room in a refrigeration temperature zone, a freezing room in a refrigeration temperature zone, a cooling chamber provided in the freezer compartment, a cooler and a cooling fan housed in the cooling compartment, and cold air from the cooling fan to the freezer compartment A refrigeration discharge air passage to be discharged, a refrigeration return air passage configured in front of the cooling chamber to suck in return air that has cooled the freezer compartment from the lower front part of the cooler, and cool air from the cooling fan is discharged to the refrigerator compartment And a refrigeration return air passage configured on the side surface of the cooling chamber so as to suck in the return air that has cooled the refrigeration chamber from the lower side of the cooler from the center in the height direction of the cooler. And provided with a bypass air passage in the front and back surfaces of the cooler that forms a gap between the cooling chamber and the cooler from the lower end of the cooler to above the center in the height direction of the cooler. And the cold Vessel is provided with a pipe and fins is divided in the vertical direction, the upper end portion of the bypass air passage is approximately the center in the height direction of the fin independent divided, return air from the freezer compartment, the cooling The return air from the refrigerator compartment flows through the bypass air passage on the back side of the cooler, and the height dimension of the bypass air passage on the back side of the cooler is the cooling air flow. It is larger than the height dimension of the bypass air passage on the front side of the cooler, and the depth dimension of the bypass air passage on the rear side of the cooler is larger than the depth dimension of the bypass air path on the front side of the cooler. refrigerators.

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