JP2019117036A - refrigerator - Google Patents

Abstract

To provide a refrigerator which secures sufficient depth inside, which improves heat exchange efficiency of an evaporator, and which can simplify a duct structure.SOLUTION: A refrigerator includes: a flat plate-like evaporator 14 arranged across from the upper part to the lower part of an inner wall 2c-1 so as to be along the inner wall 2c-1 on the back surface side in an inner case 2c of the refrigerator; a suction fan 70 opposing to the lower part of the evaporator 14, and arranged in the front side, which is further on the door 3 side of the refrigerator than the evaporator 14; and a heat insulation part 20 arranged in front of the evaporator 14 so as to cover the evaporator 14 in a front view from the door 3 side. Between the heat insulation part 20 and the evaporator 14, and between the inner wall 2c-1 and the evaporator 14, gaps S1, S2 serving as cold air passages are provided, and by the suction fan 70, air is blown from the lower side to the upper side of the evaporator 14.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a refrigerator, and more particularly to a refrigerator provided with a fan for circulating cold air.

  Conventionally, in a single-door type refrigerator not having a freezer compartment, a refrigerator having an evaporator in the upper part in the refrigerator and a blowout fan in the upper part than the evaporator has been proposed (for example, Patent Document 1) ).

JP, 2005-257230, A

  However, in the configuration in which the evaporator and the blowing fan are provided in the upper part in the inside as in Patent Document 1, a space for arranging the evaporator and the blowing fan is required, so the depth in the upper part in the inside becomes narrow. In addition, since the heat exchange area of the evaporator can not be increased, the efficiency of heat exchange is reduced. Furthermore, the duct structure becomes complicated in order to distribute cold air from the blowout fan installed at the upper part in the storage to the storage.

  The object of the present invention is to solve the above-mentioned problems, and to provide a refrigerator capable of securing a sufficient depth in the storage and improving the heat exchange efficiency of the evaporator and further simplifying the duct structure. It is to do.

  According to one aspect of the refrigerator of the present invention, a flat plate-like evaporator disposed from above to below the inner wall and a lower part of the evaporator along the inner wall on the back side of the inner box of the refrigerator; A suction fan disposed forward of the evaporator on the door side of the refrigerator, and a heat insulating portion disposed forward of the evaporator so as to cover the evaporator in a front view from the door side And a gap serving as a cold air passage is provided between the heat insulating portion and the evaporator, and between the inner wall and the evaporator, and the suction fan is provided from below the evaporator. It blows upward, It is characterized by the above.

  According to one aspect of the refrigerator of the present invention, air in the refrigerator is sucked by the suction fan and blown downward in the circumferential direction of the suction fan. The blown air flows through a gap serving as a cold air passage provided between the heat insulating portion and the evaporator and between the inner wall and the evaporator, is cooled by the evaporator, and is sent into the refrigerator. The flat evaporator is disposed from the top to the bottom of the inner wall along the rear inner wall of the inner box of the refrigerator, so the area of the evaporator can be increased and the efficiency of heat exchange is improved. It can be done. In addition, since the suction fan faces the lower portion of the evaporator and is disposed forward of the evaporator, a space for disposing the fan is not necessary in the upper portion of the refrigerator, and the upper portion of the refrigerator has a storage It is possible to use the inside effectively. Also, since the suction fan is provided in front of the evaporator, the length of the evaporator can be extended downward without being impeded by the suction fan, and the defrost water enters the suction fan You can prevent.

  In another aspect of the refrigerator of the present invention, the suction fan may be an eccentric fan or an axial fan. According to this aspect, the eccentric fan or the axial flow fan can blow air above the lower side of the evaporator, thereby eliminating the need for a space for disposing the fan in the upper part of the refrigerator. It is possible to use the inside of the upper part of the box effectively.

  In another aspect of the refrigerator according to the present invention, the flat evaporator may be a roll bond type or a pipe on sheet type evaporator. According to this aspect, it is possible to thin the evaporator in a flat plate shape, to reduce the size of the protrusion in the storage, and to use the inside of the storage effectively.

  In another aspect of the refrigerator of the present invention, the suction fan may be mounted in a duct having an opening at the lower side. According to this aspect, the air sucked by the suction fan and exhausted from the suction fan is discharged from the opening provided below the duct and flows to the cold air passage. Therefore, even when the suction fan is stopped, it is possible to prevent the backflow of the cold air from the cold air passage through the suction fan and to cool the air by the evaporator in the cold air passage. In addition, although the suction fan uses an eccentric fan, it may be an axial fan.

  Another aspect of the refrigerator according to the present invention is a refrigerator compartment, a switching compartment which can be set to a temperature lower than the temperature of the refrigeration compartment, a blowout fan, and a heat insulating partition provided between the refrigeration compartment and the switching compartment From the blowout fan, a blocking portion that divides a cold air passage from the suction fan and a cold air passage to the blowout fan in a predetermined range of the cold air passage between the heat insulating portion and the evaporator; And a switching chamber duct for blowing cold air to the switching chamber.

  According to this aspect, the air sucked by the suction fan and sent out to the cold air passage flows from the lower side of the evaporator to the upper side, and is cooled by the evaporator in the cold air passage. However, the cooling passage is divided into a cold air passage from the suction fan and a cold air passage to the blowing fan by the blocking section in a predetermined range. Therefore, the air flowing in the cold air passage from the suction fan is folded back to the cold air passage to the blowout fan after passing a predetermined range. Cold air flowing in a cold air passage to the blowout fan flows from the blowout fan to the switching chamber via the switching chamber duct. As a result, the temperature of the switching chamber can be made lower than the temperature of the refrigerator without adopting a duct having a complicated structure.

  According to the other aspect of the refrigerator of this invention, you may provide the control part which controls the drive period of the said blowing fan according to the switching temperature of the said switching chamber. According to this aspect, when the drive period of the blowout fan is controlled by the control unit, the amount of cold air delivered to the switching chamber per unit time is different, and the switching temperature of the switching chamber can be switched to a plurality of stages.

  As described above, according to the present invention, it is possible to secure a sufficient depth in the refrigerator, improve the heat exchange efficiency of the evaporator, and simplify the duct structure.

It is a perspective view showing the refrigerator concerning one embodiment of the present invention. It is the front view which removed the door of the refrigerator shown in FIG. 1, and looked at the inside. It is the A-A 'line sectional view shown in FIG. It is the B-B 'line sectional view shown in FIG. It is the C-C 'line sectional view shown in FIG. It is the D-D 'line sectional view shown in FIG. It is the E-E 'line sectional view shown in FIG. It is the F-F 'line sectional view shown in FIG. It is the G-G 'line sectional view shown in FIG.

Embodiment
FIG. 1 is a perspective view showing a refrigerator 1 according to an embodiment of the present invention. FIG. 2 is a front view of the inside of the refrigerator 1 shown in FIG. 1 with the door 3 removed. FIG. 3 is a cross-sectional view taken along the line AA 'shown in FIG. FIG. 4 is a cross-sectional view taken along line BB ′ shown in FIG. FIG. 5 is a cross-sectional view taken along line CC ′ shown in FIG. 6 is a cross-sectional view taken along line DD 'shown in FIG. FIG. 7 is a cross-sectional view taken along the line EE 'shown in FIG. FIG. 8 is a cross-sectional view taken along line FF ′ shown in FIG. FIG. 9 is a cross-sectional view taken along line GG ′ shown in FIG. An outline of a refrigerator 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 9.

(Description of a refrigerator according to an embodiment of the present invention)
As shown in FIG. 1, the refrigerator 1 according to an embodiment of the present invention is a single-door type refrigerator including a refrigerator main body 2 and a door 3. The refrigerator main body 2 is provided with the storage room 10 comprised from the refrigerator compartments 4 and 5 and the switching chamber 6, as shown in FIG. The cold storage compartments 4 and 5 and the switching compartment 6 are separated by the heat insulating partition wall 7. Usually, the refrigerator compartments 4 and 5 are kept at a temperature of 2 to 12 ° C, and the switching chamber 6 is kept at a temperature of either 0 ° C, 2 ° C or 5 ° C. The cold storage compartments 4 and 5 and the switching compartment 6 have an opening on the front side of the refrigerator body 2 so that food and the like stored in each compartment can be taken in and out.

  The openings of the refrigerating compartments 4 and 5 and the switching compartment 6 can be opened and closed by a single-opening type door 3 provided in front of the refrigerator body 2.

  As shown in FIG. 3, which is a cross-sectional view taken along the line A-A ′ shown in FIG. 2, the refrigerator body 2 includes an outer case 2 a, an inner case 2 c, and a heat insulating material 2 b. The outer case 2a is formed of a steel plate. The inner case 2c is formed of a synthetic resin, and disposed in the outer case 2a with a gap from the outer case 2a. The heat insulating material 2b is formed of foamed polyurethane, and is filled in the gap between the outer case 2a and the inner case 2c.

  Of the inner wall of the inner box 2c, near the inner wall 2c-1 on the back side of the refrigerator body 2, a flat evaporator 14 extends from above to below the inner wall 2c-1 along the inner wall 2c-1. It is arranged.

  The evaporator 14 is a flat evaporator, and a roll bond type evaporator is used as an example. In the roll bond type evaporator, one or both surfaces of two aluminum plates are formed in a convex shape corresponding to the flow path pattern of the refrigerant, and the two aluminum plates are bonded to each other. And the evaporator which formed the concave flow path pattern.

  The evaporator 14 is arrange | positioned with predetermined spacing with respect to inner wall 2c-1, and forms cold air | gas channel | path S1. Moreover, the heat insulation part 20 is arrange | positioned with predetermined spacing with the evaporator 14 ahead [the door 3 side rather than the evaporator 14], and forms cold air | gas passage S2. Thus, the cold air passages S1 and S2 are formed both behind the evaporator 14 on the inner wall 2c-1 side and in front of the evaporator 14 on the heat insulation portion 20 side. In the present specification, “forward” refers to the direction of the door 3 side unless otherwise specified, and similarly “back” refers to the back side of the refrigerator 1 unless otherwise specified. I assume.

  The heat insulating portion 20 is attached to the back cover 15 of the storage chamber 10, and as shown in FIG. 4 which is a cross-sectional view taken along the line B-B 'in FIG. 3 and FIG. It is arrange | positioned ahead of the evaporator 14 so that the front surface of 14 may be covered. Further, as shown in FIG. 4, both ends 20 a in the width direction of the heat insulating unit 20 are bent toward the evaporator 14 to cover the side portions of the cold air passage S 2. As shown in FIG. 3, openings 20b are provided at a plurality of locations at both ends 20a of the heat insulating unit 20, and cold air is provided from the cold air passage S2 through the openings 20b as shown by arrow H in FIG. It flows to the storage room 10 side.

  A communicating portion S3 and a communicating portion S4 are provided on the lower side and the upper side of the evaporator 14, respectively. The air in the storage chamber 10 flows into the cold air passage S1 and the cold air passage S2 through the communication portion S3, and the air cooled by the evaporator 14 in the cold air passage S1 and the cold air passage S2 is the opening 20b of the heat insulating portion 20. The fluid flows into the storage chamber 10 via the upper communication portion S4.

  At the lower communication portion S3 of the evaporator 14, a tray 18 for draining drain water is provided. Drain water in the pan 18 is drained to the evaporation pan 30 by the drain pipe 60 through an opening (not shown) provided in the pan 18.

  A machine room 19 is provided in the lower part of the refrigerator 1 and on the back side of the switching room 6. In the machine room 19, a compressor 50 for compressing the refrigerant is disposed. The above-described evaporator 14 is connected to the compressor 50, a radiator (not shown), a capillary tube (not shown) and the like via a refrigerant pipe, and constitutes a vapor compression refrigeration cycle. The details of the refrigeration cycle are omitted.

  At the top of the compressor 50, an evaporation pan 30 is disposed. In the refrigerator 1 of the present embodiment, no freezer is provided, and the temperature of the evaporator 14 is not as low as when the freezer is provided. Therefore, even if frost adheres to the evaporator 14, the frost is a small amount, and the frost is blown off by the air flow and falls to the saucer 18. The frost melts in the tray 18 and becomes water, and the water is discharged as drain water from an opening provided in the tray 18 through the drain pipe 60 and stored in the evaporation tray 30.

  The evaporation dish 30 has a concave portion (not shown) formed therein corresponding to the convex shape of the upper portion of the compressor 50, and the bottom surface of the evaporation dish 30 is disposed at a position close to the upper surface of the compressor 50 . As a result, the heat generated by the compressor 50 is transferred to the drain water stored in the evaporating dish 30, and the drain water evaporates from the evaporating dish 30.

  A suction fan 70 is disposed in front of the lower portion of the evaporator 14 so as to face the lower portion of the evaporator 14. As shown in FIG. 2, the suction fan 70 is disposed on the back side of the back cover 15 at the position of the refrigerator compartment 5, and is disposed on the right side of the center of the refrigerator body 2 in a front view seen from the door 3 side. ing. A blowout fan 80 described later is disposed on the left side of the center of the refrigerator body 2.

  As shown in FIG. 3, the back cover 15 is bent so as to be convex toward the door 3 at the position of the refrigerator compartment 5, and forms a suction fan 70, a blowing fan 80, and a flow path of air. To secure the area for. A fan front heat insulating material 40 is disposed on the back side of the portion of the back cover 15 most projecting to the door 3 side. The heat insulator before fan 40 has an opening 41 as shown in FIG. 5 which is a cross-sectional view taken along the line C-C 'in FIG. 3, and the opening 41 has a switching chamber 6 as shown in FIG. It communicates with the switching chamber suction port 43 provided in the back cover 15 at the position of.

  Further, as shown in FIGS. 2 and 5, the back cover 15 facing the upper portion of the opening 41 is provided with a refrigerator compartment suction port 42, and the opening 41 also communicates with the refrigerator compartment suction port 42. ing. As shown in FIG. 3, a passage S5 for air is provided behind the front heat insulating material 40, and the opening 41, the switching chamber suction port 43, and the refrigerating chamber suction port 42 communicate with the passage S5. ing.

  As shown in FIG. 3, the suction fan 70 is attached to the rear 46 of the fan mounting plate mounted on the front 45 of the fan mounting plate. The fan mounting plate front 45 has its upper end attached to the inclined surface of the back cover 15 at the position of the refrigerator compartment 5 and its lower end attached to the lower end of the back cover 15. The rear fan mounting plate 46 is located at the rear of the front 45 of the fan mounting plate and is mounted on the rear of the front 45 of the fan mounting plate.

  As shown in FIG. 6 which is a cross-sectional view taken along the line D-D 'in FIG. 3, the front of the fan mounting plate 45 has an opening 47, and the opening 47 has a fan shape which spreads downward. The opening 47 is a cold air passage S2 formed between the heat insulating portion 20 and the evaporator 14, and a cold air passage S1 formed between the evaporator 14 and the inner wall 2c-1 on the back side of the refrigerator body 2. It is in communication with

  The suction fan 70 is an eccentric fan or a fan called a centrifugal fan, has a plurality of blades annularly arranged around the rotation axis, and blows out the air taken in radially inward to the radially outer side . As shown in FIG. 3, the upper portion of the fan mounting plate 46 is closed, and the lower portion of the fan mounting plate 46 is open as shown in FIGS. Further, as shown in FIG. 7 which is a cross-sectional view taken along the line E-E 'in FIG. 3, the side and the rear of the suction fan 70 are also closed by the rear of the fan mounting plate 46. Therefore, the fan mounting plate front 45 and the fan mounting plate rear 46 as described above function as a duct, and the air flowing into the passage S5 through the cold storage suction port 42 and the switching chamber suction port 43 is sucked by the suction fan 70 It is discharged below the fan 70. The discharged air is cooled by the evaporator 14 in the process of flowing through the cold air passage S1 and the cold air passage S2, and flows to the cold storage compartments 4, 5 through the opening 20b or the passage S4.

  As shown in FIG. 3, since the refrigerating chamber 5 and the switching chamber 6 are partitioned by the heat insulating partition wall 7, cold air flows in a path different from the above-described path for the switching chamber 6. In order to supply cold air to the switching chamber 6, a blowout fan 80 is provided in the present embodiment. As shown in FIG. 2, the blowout fan 80 is provided on the left side of the suction fan 70 in a front view from the door 3 side.

  FIG. 8 is a front sectional view taken along line F-F 'in FIG. As shown in FIG. 8, in the cold air passage S2 formed between the back cover 15 and the evaporator 14, a region through which the air exhausted from the suction fan 70 flows and a region through which the air flows to the blowout fan 80 A blocking portion 21 is provided to separate the two.

  As shown in FIG. 8, the blocking portion 21 includes an upright portion 21 a disposed substantially in parallel with both end portions 20 a of the heat insulating portion 20 and a bent portion 21 b continuing to the upright portion 21 a. The position of the upright portion 21a is, as shown in FIG. 8, a position closer to the left than the center in the width direction of the refrigerator main body 2 corresponding to the width of the refrigerator compartment suction port 42. The position in the width direction corresponds to the position of the partition portion 42 a of the front heat insulator 40 shown in FIG. 5.

  Further, the upper end of the upright portion 21a of the blocking portion 21 is provided at a position having a predetermined distance with respect to the upper surface portion 2c-2 of the inner wall 2c. Therefore, the cold air which is sucked by the suction fan 70 and flows in the cold air passage S2 on the suction fan 70 side divided by the blocking portion 21 in the direction of arrow I cuts short in the direction of arrow J after passing the upper end of the upright portion 21a. Then, it flows in the direction of the arrow K through the cold air passage S2 on the blowing fan 80 side partitioned by the blocking part 21 and reaches the position of the blowing fan 80.

  As shown in FIG. 9, which is a cross-sectional view taken along the line GG 'in FIG. 8, the back surface of the blowout fan 80 communicates with the cold air passage S2, and the flow shown by arrows L, M, N, O It is blown out from the port 44 and supplied to the switching chamber 6.

  As shown in FIG. 8, the switching chamber outlet 44 is not disposed immediately below the outlet fan 80. However, as shown in FIG. 5, the shape of the opening 48 of the pre-fan heat insulator 40 located in front of the blowout fan 80 is curved so as to guide the cold air blown out from the blowout fan 80 to the switching chamber blowout port 44 It has a shape. As a result, the pre-fan heat insulator 40 having the opening 48 shaped as described above plays a role of the switching chamber duct, and guides the cold air blown out from the blowing fan 80 to the switching chamber blowout port 44 to the switching chamber 6 And supply.

  The blowout fan 80 is intermittently driven by a control unit (not shown). The switching temperature of the switching chamber 6 can be switched to any temperature of 0 ° C., 2 ° C. or 5 ° C. The lower the switching temperature, the longer the drive period, and the higher the switching temperature, the shorter the drive period As such, it is controlled by the control unit.

  As described above, according to the present embodiment, the flat evaporator 14 is disposed from above to below the inner wall 2c-1 along the inner wall 2c-1 on the back side of the inner box 2 of the refrigerator 1, The heat insulating portion is disposed in front of the evaporator 14 so as to cover the evaporator 14 in a front view from the door 3 side. And between the heat insulation part 20 and the evaporator 14, and between the inner wall 2c-1 and the evaporator 14, the gap used as cold air | gas channel S1, S2 is provided. Therefore, heat exchange is performed on both sides of the evaporator 14, and the area of the heat exchange performed by the evaporator 14 can be increased, and efficient cooling can be performed. Further, since the evaporator 14 is flat, the protrusion size with respect to the storage chamber 10 is small, and the depth in the storage chamber 10 can be made deeper compared to the case where a conventional evaporator is used.

  Since the suction fan 70 is disposed forward of the evaporator 14 so as to face the lower portion of the evaporator 14, the depth of the upper portion of the storage chamber 10 is higher than when the fan is disposed at the upper portion of the storage chamber 10. Can be taken deep. Moreover, since there is no fan below the evaporator 14, the lower part of the evaporator 14 can be extended below the suction fan 70, and the heat exchange area of the evaporator 14 can be increased. Furthermore, since the rear of the suction fan 70 on the evaporator 14 side is covered by the rear of the fan mounting plate 46, it is possible to prevent the defrost water from entering the suction fan 70.

  Since an eccentric type fan is used for the suction fan 70, it is possible to create an air flow from below the suction fan 70 to the cold air passages S1 and S2 with a simple duct structure. In addition, since the duct structure is simplified, space saving can be realized.

  According to the present embodiment, in order to achieve different temperature zones in the refrigerator compartments 4, 5 and the switching chamber 6, the cold air is delivered using two fans, the suction fan 70 and the blowoff fan 80. Therefore, it is possible to omit the motor damper for adjusting the amount of cold air in the switching chamber or the switching shutter.

  Further, since the switching of the temperature of the switching chamber 6 can be realized by adjusting the driving period of the blowing fan 80, there is no need to install a mechanical part such as a damper or a shutter, and the configuration can be simplified.

<Modification>
In the embodiment described above, a roll bond type evaporator is used as the evaporator 14, but a pipe-on-sheet type evaporator may be used. The pipe-on-sheet type evaporator is a flat plate type evaporator in which a pipe for supplying a refrigerant is mounted on a sheet type metal plate. Also in this case, as in the above-described embodiment, the area of heat exchange is increased, and efficient cooling is possible.

  In the embodiment described above, the aspect in which the blowout fan 80 is provided in addition to the suction fan 70 has been described, but the blowout fan 80 is omitted when all the temperature in the storage room 10 is the temperature of the refrigerator compartment. May be

  When the cold storage compartments 4 and 5 are used as a wine compartment, an auxiliary heater may be used.

  Although the embodiments and modes of the present invention have been described, the disclosed contents may be varied in the details of construction, and the combinations and changes of the elements and the like in the modes and embodiments may be claimed. It can be realized without departing from the scope and spirit of the invention.

DESCRIPTION OF SYMBOLS 1 refrigerator 2 refrigerator main body 2c-1 inner wall 2c-2 upper surface part 3 door 4 cold storage room 5 cold storage room 6 switching room 7 heat insulation partition wall 10 storage room 14 evaporator 15 back cover 18 saucer 19 machine room 20 heat insulation part 20a both ends 20b Opening part 21 Block part 21a Upright part 21b Flexion part 30 Evaporative tray 40 Fan front thermal insulation 41 Opening part 42 Cold storage room suction port 42a Partition part 43 Switching room suction port 45 Fan mounting plate front 46 Fan mounting plate back 70 Suction fan 80 Blowing fan S1 cold aisle S2 cold aisle

Claims (6)

A flat plate-like evaporator disposed from above to below the inner wall so as to be along the rear inner wall of the inner box of the refrigerator;
A suction fan disposed opposite to the lower part of the evaporator and located forward of the evaporator on the door side of the refrigerator;
And a heat insulating portion disposed in front of the evaporator so as to cover the evaporator in a front view from the door side.
Between the heat insulating portion and the evaporator, and between the inner wall and the evaporator, a gap serving as a cold air passage is provided.
The air is blown upward from below the evaporator by the suction fan.
A refrigerator characterized by The suction fan is an eccentric fan or an axial fan.
The refrigerator according to claim 1, characterized in that. The flat evaporator is a roll-bonded or pipe-on-sheet evaporator.
The refrigerator according to claim 1 or 2, characterized in that. The suction fan is mounted in a duct having an opening at the bottom,
The refrigerator according to any one of claims 1 to 3, characterized in that. Setting temperature is different from cold room,
A switching room which can be set to a temperature lower than the temperature of the cold storage room;
With a balloon fan,
A heat insulating partition wall provided between the cold storage room and the switching room,
In a predetermined range of the cold air passage between the heat insulating portion and the evaporator, a shut-off portion that divides the cold air passage from the suction fan and the cold air passage to the blowout fan;
And a switching chamber duct for blowing cold air from the blowing fan to the switching chamber.
The refrigerator according to any one of claims 1 to 4, characterized in that. And a controller configured to control a driving period of the blowout fan according to a switching temperature of the switching chamber.
The refrigerator according to claim 5, characterized in that.