JP5553799B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator, and more particularly to a structure of an air passage for guiding cold air to a refrigerator room or the like.

  As for the temperature in the refrigerator compartment when the operation is stopped in the refrigerator, it is known that warm air accumulates in the upper part and cold air accumulates in the lower part by natural convection. For this reason, the upper part of the refrigerator compartment immediately before the start of the cooling operation is in a state where warm air of 5 to 10 ° C. is retained.

  Thus, since warm air tends to accumulate in the upper part of the refrigerator compartment, in order to cool it, a large amount of cool air must be blown out and stirred with warm air to perform heat exchange. However, since warm air and cold air are less likely to mix as there is a temperature difference, such a cooling method has a problem that it takes a long time to cool the refrigerator compartment.

  In order to efficiently cool the refrigerator compartment in a conventional refrigerator, a cold air outlet is provided in the upper part of the refrigerator compartment and the central part on the back side, and a refrigerator inlet is provided in the upper part on the back side of the refrigerator compartment. Yes (see, for example, Patent Document 1).

JP-A-10-292975 (page 3, FIGS. 1 and 2)

  In the refrigerator of Patent Document 1, the cold air blown out from the air outlet is provided in close proximity to the cold air outlet provided in the back side of the refrigerator room and the refrigerator inlet provided in the upper part on the back side. However, since it is sucked into the suction port without sufficiently cooling the refrigerator compartment, there is a problem that the cooling efficiency is lowered.

  The present invention has been made to solve the above-described problems, and by sucking in warm air accumulated in the upper part of the refrigerator compartment at the same time as starting the cooling of the refrigerator compartment, and replacing the cold air blown into the refrigerator compartment without stirring. An object of the present invention is to provide a refrigerator capable of shortening the cooling time of the refrigerator compartment and realizing energy saving.

The refrigerator according to the present invention is composed of an outer box, an inner box, and a heat insulating material filled between the two, and a refrigerator compartment, a freezer compartment, and a vegetable compartment are provided from the upper part to the lower part by the first and second partition walls. a heat insulating box body that is, the provided on the back side of the freezing chamber evaporator and the freezing chamber, wherein the refrigerating chamber and the cold air distribution chamber blower for circulating cold air is installed into the vegetable compartment, the rear of the refrigerating chamber A refrigerator compartment duct that is provided from the side to the ceiling portion and communicates with the cold air distribution chamber to send cold air to the refrigerator compartment, and communicates with a suction port provided at an upper portion of the refrigerator compartment, and is provided along the rear surface of the refrigerator compartment. A first refrigerating room cold air recirculation duct that communicates with the first partition wall and sucks warm air in the upper part of the refrigerating room, and the first refrigeration from the bottom of the refrigerating room through the first partition wall. Communicating with the cool air reflux duct, A second refrigerating room cold air recirculation duct that merges with the warm air of the first refrigerating room cold air recirculation duct, a vegetable room duct that communicates with the first refrigerating room cold air recirculation duct, and sends cold air to the vegetable room; a freezing chamber cold air reflux duct communicating with the cool air distribution chamber and the freezing chamber provided in the second partition wall, a vegetable compartment cool air that communicates with the cool air distribution chamber and the vegetable compartment provided in the second partition wall And a reflux duct.

  According to the present invention, the warm air accumulated in the upper part of the refrigeration room can be sucked into the refrigeration room cold air reflux duct and replaced with the cold air blown into the refrigeration room from the refrigeration room duct without being stirred. The cooling time of the refrigerator can be shortened and energy saving can be realized.

It is typical sectional drawing of the refrigerator which concerns on Embodiment 1 of this invention. It is a schematic diagram of the front principal part of the state which removed the door of FIG. It is AA sectional drawing of FIG. FIG. 2 is a partially enlarged view of an upper part of FIG. 1. It is a schematic diagram of the front principal part of the state which removed the door of the refrigerator which concerns on Embodiment 2 of this invention. It is a front schematic diagram of the state which removed the door of the refrigerator which concerns on Embodiment 4 of this invention. It is a front schematic diagram of the state which removed the door of the refrigerator which concerns on Embodiment 5 of this invention.

[Embodiment 1]
1 and 2 showing the refrigerator according to the first embodiment of the present invention, reference numeral 1 denotes a heat insulating box constituting the refrigerator main body, and an outer box 2, an inner box 3 whose front side is opened, and these outer box 2 and inner It is comprised by the heat insulating material 4 with which the box 3 was filled. Reference numeral 6 denotes a first partition wall provided in the vicinity of the middle part of the heat insulating box 1 in the vertical direction, and reference numeral 7 denotes a second partition wall provided below, from the top to the refrigerator compartment 8, the freezer compartment 9 and the vegetables. A chamber 10 is defined.
11 is, for example, a double door that opens and closes the front side opening of the refrigerator compartment 8, 12 is a drawer door of the freezer compartment 9, and 13 is a drawer door of the vegetable compartment 10.

  16 is an evaporator installed in a cool air distribution chamber 15 formed between a back plate 9a made of a resin material having a freezer outlet 14 and an inner box 3 on the rear side of the freezer compartment 9, and 17 is an evaporator. It is a blower that is installed above the vessel 16 and circulates cold air heat-exchanged by the evaporator 16 to the refrigerator compartment 8, the freezer compartment 9, and the vegetable compartment 10. Although not shown, a compressor is installed on the back side of the vegetable compartment 10.

  As shown in FIGS. 3 and 4, an inner box 3 is provided at the center in the width direction of the resin material 5 provided between the back plate 8 a and the top plate 8 b of the refrigerator compartment 8 made of a resin material and the inner box 3. A plurality of refrigerating chamber outlets 19 that open to the refrigerating chamber 8 are provided in the vertical direction of the refrigerating chamber 8, and communicated with the cold air distribution chamber 15. The room duct 18 is provided with a refrigerating room outlet 19a that opens to the front side.

  As shown in FIGS. 3 and 4, 20 is provided along the back plate 8 a so as to be shifted to one side in the width direction of the resin material 5 provided between the top plate 8 b of the refrigerator compartment 8 and the inner box 3. And a pair of air inlets that open to both sides of the top plate 8b on the back side of the cold room outlet 19a in the ceiling, in the first cold room cold air reflux duct, which is a return air passage leading to the first partition wall 6. 21a and 21b (hereinafter simply referred to as 21).

  22 is a second refrigerating room cold air recirculation duct that opens to the floor of the refrigerating room 8 and communicates with the first refrigerating room cold air recirculation duct 20 through the first partition wall 6, and 23 is a first refrigerating room cold air. This is a vegetable room duct that communicates with the reflux duct 20 and supplies cold air to the vegetable room 10. Note that the refrigerator compartment duct 18 and the first refrigerator compartment cold air reflux duct 20 intersect each other in the vicinity of the ceiling.

  Reference numeral 24 is provided on the second partition wall 7 to connect the freezer compartment 9 and the cold air distribution chamber 15 to the freezer compartment cold air reflux duct. Reference numeral 25 is provided on the second partition plate 7 to provide the cold air distributor with the vegetable compartment 10. A vegetable room cold air reflux duct communicating with the chamber 15.

  In the refrigerator according to the present embodiment configured as described above, the cold air exchanged by the evaporator 16 is supplied from the outlet 14 of the freezer compartment 9 to the freezer compartment 9 by the blower 17, and the cold air distribution chamber 15. The inside of the refrigerating room 8 is uniformly cooled through the refrigerating room outlet 19 provided in the back plate 8a of the refrigerating room 8 and the refrigerating room outlet 19a provided in the ceiling through the refrigerating room duct 18 communicating with the refrigerating room 8. To do.

  The warm air staying in the upper part of the refrigerator compartment 8 is pushed by the cold air blown out from the refrigerator compartment outlets 19 and 19a and is sucked in from the inlets 21a and 21b provided on both sides of the ceiling portion. The low-temperature cold air that has flowed through the reflux duct 20 and flows into the second refrigerating room cold-air reflux duct 22 through the first partition wall 6 is merged and supplied to the vegetable room 10 by the vegetable room duct 23 to cool the vegetable room 10. To do.

  On the other hand, the cold air that has been supplied to the freezer compartment 9 and has cooled the inside of the freezer compartment 9 is returned to the lower part of the evaporator 16 in the cold air distribution chamber 15 from the freezer compartment cold air reflux duct 24 provided in the second partition wall 7. The cold air that has cooled the vegetable compartment 10 is returned from the vegetable compartment cold air reflux duct 25 provided in the second partition wall 7 to the lower portion of the evaporator 16 in the cold air distribution chamber 15. In this way, the slightly hot air returned to the cold air distribution chamber 15 is cooled again by the evaporator 16 and circulates in the cabinet as described above.

  In the refrigerator according to the present embodiment configured as described above, the first refrigerating room cold air reflux duct 20 that communicates with the suction ports 21 a and 21 b provided on both sides of the ceiling of the refrigerating room 8 includes the refrigerating room 8. Since it leads from the ceiling to the first partition wall 6, the refrigerator 11 is heated by opening / closing the door 11, the heat of the stored food, the heater of the refrigerator 8, or the intrusion of heat from the outside. The inside air is returned from the refrigerator compartment 8 so as to be pushed out by the cold air blown out from the refrigerator outlets 19 and 19a without being stirred with the cold air.

  On the other hand, since the 1st refrigerator compartment cold air recirculation | reflux duct 20 leads from the ceiling part of the refrigerator compartment 8 to the 1st partition wall 6, the pressure loss in the refrigerator compartment 8 becomes large. When the pressure loss increases, the amount of cold air blown from the refrigerator compartment outlets 19 and 19a to the refrigerator compartment 8 decreases, and the inside of the refrigerator compartment 8 cannot be cooled to a desired temperature.

  For this reason, in the present embodiment, the second refrigerator compartment cold air reflux duct 22 that opens to the bottom of the refrigerator compartment 8 and communicates with the first refrigerator compartment cold air reflux duct 20 through the first partition wall 6 is provided. Since it provided, the pressure loss in the refrigerator compartment 8 can be reduced, and since the amount of cold air blown into the refrigerator compartment 8 can be secured, the temperature of the upper part of the refrigerator compartment 8 can be efficiently cooled. .

Further, since the back plate 8a, the top plate 8b, etc. of the refrigerator compartment 8 are made of a resin material, since the difference from the ambient temperature is small, even if the cold air passing through the refrigerator compartment duct 18 comes into contact with these, Condensation does not freeze on the surface of the face plate 8a or the top face plate 8b.
Further, even if slightly warm air passing through the first refrigerator compartment cold air reflux duct 20 contacts the back plate 8a and the top plate 8b, the temperature of the air passing through the first refrigerator compartment cold air reflux duct 20 and the ambient temperature Therefore, there is no possibility that the back plate 8a and the top plate 8b are frozen. In addition, since heat exchange through the back plate 8a and the like can be reduced for this reason, it is possible to prevent a decrease in cooling efficiency.

  As described above, according to the refrigerator according to the present embodiment, warm air accumulated in the upper part can be sucked from the suction ports 21a and 21b provided on both sides of the upper part of the refrigerator compartment 8 together with the start of cooling of the refrigerator compartment 8, It is possible to replace the warm air with the cool air to increase the cooling rate, thereby promoting energy saving.

[Embodiment 2]
FIG. 5 is a schematic diagram of the main part of the front surface showing a state where the refrigerator door according to Embodiment 2 of the present invention is removed.
In the present embodiment, a damper 26 is provided on the downstream side of the suction port 22a of the second refrigerating room cold air reflux duct 22 of the refrigerator according to the first embodiment, and the damper 26 is opened and closed according to the temperature near the ceiling of the refrigerating room 8 It is what you do.

  According to this embodiment, the temperature near the ceiling of the refrigerator compartment 8 is detected by the temperature sensor 27 provided at or near the ceiling of the refrigerator compartment 8, and warm air accumulates in the ceiling so that the temperature of the ceiling becomes When the temperature is higher than the set temperature, the damper 26 is closed, and the warm air at the ceiling portion of the refrigerating room 8 is obtained only by the first refrigerating room cold air recirculation duct 20 without joining the cold air of the second refrigerating room cold air recirculation duct 22. The inside of the refrigerator compartment 8 is efficiently removed by quickly removing it.

In addition, when the temperature of the ceiling portion of the refrigerator compartment 8 is the set temperature (when there is no difference from the average temperature of the refrigerator compartment 8), or lower than the preset temperature, the damper 26 is opened and the first refrigerator compartment cold air reflux is performed. The warm air in the duct 20 and the cool air in the second refrigerating room cold air recirculation duct 22 are merged and supplied to the vegetable room 10.
According to the present embodiment, by opening and closing the damper 26 according to the temperature in the vicinity of the ceiling portion of the refrigerator compartment 8, the inside of the refrigerator compartment 8 can be efficiently cooled without unevenness, thereby saving energy. Can do.

[Embodiment 3]
In the first and second embodiments, the case where the suction ports 21a and 21b of the first refrigerating room cold air recirculation duct 20 are provided on both sides of the refrigerating room duct 18 is shown. The suction port 21 of the first refrigerating room cold air recirculation duct 20 in the first or second embodiment is provided only on one side of the refrigerating room duct 18.

When the door 11 of the refrigerator compartment 8 is a double door, the size of the left and right doors is often different. For this reason, when the left and right doors are opened one by one, the amount of heat entering the refrigerator compartment 8 from the outside increases when the large door is opened.
In the present embodiment, assuming that the right door is larger than the left door, the inlet 21 of the first refrigerating room cold air reflux duct 20 is provided on the right side of the larger door and enters. It is designed to efficiently absorb the heat outside the cabinet. When the left door is larger than the right door, the suction port 21 of the first refrigeration chamber cold air reflux duct 20 may be provided on the left side (the larger door).
Other configurations, operations, and effects are the same as those in the first or second embodiment.

[Embodiment 4]
FIG. 6 is a schematic front view showing a state where the door of the refrigerator according to Embodiment 4 of the present invention is removed. The same parts as those in the first embodiment are denoted by the same reference numerals.
In the present embodiment, the suction port 21 of the refrigerator compartment cold air reflux duct 20a is provided on the large door side of the double door as in the case of the embodiment 3, but the refrigerator compartment cold air reflux duct 20a is provided in the vegetable compartment. 10 is extended to the back surface, bent into a substantially U shape, opened to the lower part of the cold air distribution chamber 15, and warm air in the refrigerator compartment 8 is returned to the cold air distribution chamber 15.

In the present embodiment, the second refrigeration room cold air reflux duct 22 of the first to third embodiments is omitted, and a vegetable room duct 23a that communicates the cold air distribution chamber 15 and the vegetable room 10 is provided separately. Cold air is supplied from the chamber 15 to the vegetable chamber 10.
Other configurations, operations, and effects of the present embodiment are substantially the same as those of the third embodiment, but the second refrigerator compartment cold air reflux duct 22 can be omitted, and the structure is simplified.

[Embodiment 5]
FIG. 7 is a schematic front view showing a state where the door of the refrigerator according to Embodiment 5 of the present invention is removed. The same parts as those in the first embodiment are denoted by the same reference numerals.
In the present embodiment, two refrigerating room cold air reflux ducts 20a and 20b communicating with suction ports 21a and 21b provided on the left and right of the upper part of the refrigerating room 8 are provided independently on both sides of the refrigerating room duct 18, respectively. Are extended to the vicinity of the vegetable compartment 10 without being joined, bent into a substantially U shape and opened to the lower part of the cold air distribution chamber 15 so that the warm air in the refrigerator compartment 8 is returned to the cold air distribution chamber 15. It is a thing.
Although not shown, cold air is supplied into the vegetable room 10 by a vegetable room duct 23 a that communicates the cold air distribution room 15 and the vegetable room 10 as in the case of the fourth embodiment.

The other configurations, operations, and effects in the present embodiment are almost the same as those in the first embodiment. However, since the two refrigeration room cold air reflux ducts 20a and 20b are provided on both sides of the refrigeration room duct 18, the refrigeration is performed. A large amount of warm air from the ceiling of the chamber 8 can be sucked in, and cooling of the refrigerator compartment 8 can be promoted, so that energy saving can be achieved.
Moreover, since the cross-sectional area of the refrigerator compartment cold air reflux ducts 20 and 20a increases, the pressure loss of the refrigerator compartment 8 can be reduced, and the amount of cold air circulating through the entire refrigerator can be increased.

  DESCRIPTION OF SYMBOLS 1 Heat insulation box body, 2 outer box, 3 inner box, 4 heat insulation material, 5 resin material, 6 1st partition wall, 7 2nd partition wall, 8 refrigerator compartment, 8a back plate, 8b top plate, 9 freezer compartment , 9a Back plate, 10 Vegetable room, 11, 12, 13 Door, 14 Freezer compartment outlet, 15 Cold distribution chamber, 16 Evaporator, 17 Blower, 18 Refrigerator duct, 19, 19a Refrigerator compartment outlet, 20th 1 cold room cold air reflux duct, 20a, 20b cold room cold air reflux duct, 21 suction port, 22 second cold room cold air reflux duct, 22a suction port, 23, 23a vegetable room duct, 24 freezer room cold air reflux duct, 25 Vegetable room cold air reflux duct, 26 damper, 27 temperature sensor.

Claims (4)

It consists of a heat insulating material filled between the outer box, the inner box, and both, and a heat insulating box body provided with a refrigerator compartment, a freezer compartment, and a vegetable compartment from the upper part to the lower part by the first and second partition walls;
A cold air distribution chamber provided with a blower that circulates cold air to the evaporator, the freezer room, the refrigeration room, and the vegetable room provided on the back side of the freezer room;
A duct for a refrigerating chamber that is provided from the back side of the refrigerating chamber to the ceiling portion and communicates with the cold air distributing chamber and sends cold air to the refrigerating chamber;
A first refrigerating room cold air reflux duct that communicates with a suction port provided at an upper portion of the refrigerating chamber and that is provided along a rear surface of the refrigerating chamber and that communicates with the first partition wall and sucks warm air in the upper portion of the refrigerating chamber. When,
A second part that communicates from the bottom of the refrigerating chamber to the first refrigerating chamber cold air recirculation duct through the first partition wall to join the cold air in the refrigerating chamber with the warm air of the first refrigerating chamber cold air recirculation duct. A cold air reflux duct of the refrigerator compartment,
A vegetable room duct that communicates with the first refrigeration room cold air reflux duct and sends cold air to the vegetable room;
A freezer compartment cold air reflux duct provided in the second partition wall and communicating the freezer compartment and the cold air distribution chamber;
A refrigerator comprising a vegetable room cold air reflux duct provided on the second partition wall and communicating the vegetable room and the cold air distribution chamber. Wherein the duct refrigerating compartment, wherein with the front side of the vertical direction and a ceiling portion of the rear surface of the refrigerating compartment provided refrigerating compartment air outlet, said first refrigerating chamber cold air the refrigerating chamber of the suction port of the ceiling portion reflux duct The refrigerator according to claim 1, wherein the refrigerator is provided on both sides of the rear side of the outlet .   The door for opening and closing the front opening of the refrigerating room is provided with a double door, and a suction port for the first refrigerating room cold air reflux duct is provided corresponding to the larger door. The refrigerator described.   The damper which opens and closes according to the temperature of the ceiling part of the said refrigerator compartment was provided in the downstream of the suction inlet of the said 2nd refrigerator compartment cold air | gas recirculation | reflux duct provided in the bottom part of the said refrigerator compartment. The refrigerator as described in any one of.

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