JP3550552B2 - refrigerator - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a refrigerator, and is particularly suitable for a household refrigerator provided with a forced draft condenser in a machine room.
[0002]
[Prior art]
A medium-sized or large-sized household refrigerator (prior art 1) will be described with reference to FIGS.
[0003]
This home refrigerator includes a refrigerator box 1, a refrigerator door, a freezing cycle, and the like. The refrigerator box 1 is composed of an outer box made of a steel plate, an inner box made of a synthetic resin, and a heat insulating material made of urethane foam filled between them, and forms a plurality of storage rooms. The refrigerator door is provided so as to open and close the storage room.
[0004]
As shown in FIG. 11, the refrigeration cycle is provided with a compressor 16 for increasing and circulating a refrigerant, condensers 18 and 19 as heat exchangers for dissipating heat to the outside of the refrigerator, a radiation pipe 20 for preventing dew condensation, and a refrigerator. The storage unit comprises an evaporator 12 as a heat exchanger for cooling the storage room, and a capillary 21 connecting them.
[0005]
The condensers 18 and 19 are installed in the machine room 22 at the lower rear part of the refrigerator box 1 shown in FIG. 9 and are forcedly ventilated by the machine room blower 17 and the natural convection type condenser The refrigerator is configured in such a manner that it is used in combination with a box condenser 19 in which a refrigerant tube is embedded in contact with an outer box made of a steel plate near an outer surface in the heat insulating wall of the refrigerator box 1.
[0006]
The forced-ventilation type machine room condenser 18 requires power such as formation of an air passage and a blower, but can prevent heat from entering the refrigerator and separate the condenser 18 when disposing of the refrigerator. In addition, there is an advantage that power saving of the refrigerator can be achieved by high performance. On the other hand, the box condenser 19 has a simple structure and does not require the power of a blower or the like, but causes a decrease in performance due to heat intrusion from the box condenser 19 into the refrigerator, and at the time of disposal of the refrigerator. There is a disadvantage that it is difficult to separate the box condenser 19 from the heat insulating wall.
[0007]
As the forced ventilation type machine room condenser 18, a spiral fin type condenser 18 shown in FIG. 10 in which a refrigerant tube 18d in which a band-like fin 18c is spirally wound is bent three-dimensionally in a meandering manner is used. As shown in FIG. 9, the spiral fin type condenser 18 is installed in a machine room 22 at the lower rear part of the refrigerator box 1, and is forcibly generated by cooling air 28 that is blown by a blower 17 installed in the machine room 22. Cooled. Incidentally, as a related to the prior art 1, there is one described in Japanese Patent Application Laid-Open No. 7-318222.
[0008]
On the other hand, a refrigerated showcase (prior art 2) described in Japanese Utility Model Application Laid-Open No. 58-119178 discloses a refrigerated showcase box having a large machine room formed on the entire bottom surface, and a compressor disposed at the rear of the machine room. A cross fin tube type condenser arranged at the front of the machine room, a filter arranged at the suction part of the cross fin tube type condenser, and two machine room blowers for forcibly ventilating the compressor and the condenser. ing. In the machine room, an inclined air intake port is formed at the lower front corner, and an air discharge port is formed at the lower rear section. The cross fin tube type condenser is composed of a cross fin tube type heat exchanger in which a number of fins are arranged side by side so as to intersect with two rows of refrigerant tubes, and the refrigerant tubes extend left and right, and the bent portions thereof are left and right. It is located on both sides and is inclined forward and high in a flat shape. The machine room blower is installed without a mouth ring in a circular hole formed in a fan duct plate.
[0009]
[Problems to be solved by the invention]
However, the prior art 1 has an advantage that the spiral fin condenser 18 can be formed in a free shape in the vertical, horizontal, and depth directions in accordance with the installation space of the machine room 22. On the other hand, it is necessary to provide a large gap between each step and each row in order to prevent the rubbing noise caused by the contact of the fins in the vertical and horizontal directions. Therefore, the heat transfer area per occupied volume of the spiral fin condenser 18 must be low. As a result, it is difficult to secure a sufficient amount of heat radiation by the spiral fin-type condenser 18 installed in the machine room 22 formed of a narrow space to achieve high performance, and to reduce the power consumption of the refrigerator. There was a problem that it was difficult.
[0010]
On the other hand, prior art 2 relates to a refrigerated showcase in which a large machine room is formed on the entire bottom portion, and a suction port is provided on the front surface and a discharge port is provided on the back surface. Is completely different. That is, in the prior art 2, it is shown that the cross-fin type condenser is inclined to increase the suction area to reduce the number of times of cleaning of the filter due to dust clogging. In the case where the machine room is provided, when the filter is installed in the machine room, it is often installed so that it is difficult to take out the filter, and at present, it is difficult to clean the filter. Further, in prior art 2, the performance of the machine room condenser is improved in a narrow place such as the machine room formed at the lower corner of the back of the refrigerator box to save power, and this is realized by an inexpensive configuration. It also does not disclose achieving a good assemblability while coping with a change in capacity by changing the width of the refrigerator box.
[0011]
SUMMARY OF THE INVENTION An object of the present invention is to improve the performance of a machine room condenser to save power, and to reduce the performance of the machine room condenser even if dust is attached to the suction side of the machine room condenser. An object of the present invention is to provide a refrigerator capable of ensuring the operation performance of the refrigerator by suppressing the above.
[0012]
Another object of the present invention is to provide a refrigerator that can improve the performance of a machine room condenser and save power by using an inexpensive configuration.
[0013]
Another object of the present invention is to provide a refrigerator that has good assemblability of components in a machine room, can improve the performance of a machine room condenser, and can save power.
[0014]
Another object of the present invention is to provide a refrigerator that can easily cope with a change in capacity due to a change in the width of the refrigerator box, and can improve the performance of the machine room condenser to save power.
[0015]
[Means for Solving the Problems]
To achieve the above purpose To Departure In the light The machine room is located in the lower rear corner Is placed, Compressor , Refrigeration cycle with compressor and evaporator connected by refrigerant pipe With The compressor and the front Writing Contractor In the refrigerator provided in the machine room, The machine room is formed horizontally long over the entire width of the refrigerator box. An upper surface, a front surface, both side surfaces, a bottom surface, and a back surface are formed by the refrigerator box, the mounting plate, and the machine room cover, and are closed except for a ventilation port including a suction port and a discharge port. Space Left and right side Is The compressor is located And On the other side in the left-right direction Is Previous Writing Contractor But Arrangement Is , A partition plate that partitions a space in which the compressor is disposed and a space in which the condenser is disposed, and a partition plate that partitions a ventilation path from the condenser to the compressor, and is disposed in a mouth ring portion of the partition plate. A compressor and a machine room blower forcibly ventilating the condenser, Previous Writing Contractor , Cross-fin tube type heat exchanger with many plate-like fins arranged side by side in a meandering refrigerant tube Having a horizontal portion facing a bottom portion of the machine room and a side portion facing a side portion of the machine room, the horizontal portion extending below the machine room blower, Is configured to extend to the upper surface portion, Previous Writing The ventilation path from the compressor to the machine room blower is But Closed Is Previous Writing A semi-closed space in which the fin gap of the compressor and the gap of the machine room blower are open, The suction port of the machine room is provided on the suction side of the condenser, and the machine room blower is a propeller-type blower that is disposed so as to protrude toward the condenser side from the mouth ring portion provided on the partition plate. Is that .
[0016]
Embodiment of the present invention
Hereinafter, embodiments of the refrigerator of the present invention will be described with reference to the drawings. The same reference numerals in the drawings of the respective embodiments and the conventional example indicate the same or corresponding components.
[0017]
An overall configuration of a refrigerator according to a first embodiment of the present invention will be described with reference to FIGS. 1 is a longitudinal sectional view of a refrigerator according to a first embodiment of the present invention, FIG. 2 is a front view of the refrigerator of FIG. 1, and FIG. 3 is a refrigeration cycle diagram of the refrigerator of FIG.
[0018]
As shown in FIGS. 1 and 2, the refrigerator box 1 is composed of an outer box 1a made of a steel plate, an inner box 1b made of a synthetic resin, and a heat insulating material 1c made of foamed urethane filled therebetween. Thus, the refrigerator compartment 2, the vegetable compartment 3, the switching compartment 4, the ice making compartment 5, and the freezing compartment 6 are formed independently. Each of the storage rooms 2 to 6 is provided with a door 7 to 11. The refrigeration room 2, vegetable room 3, switching room 4, ice making room 5, and freezing room 6 are provided with functions as ordinary general storage rooms, respectively, and detailed description is omitted.
[0019]
A machine room 22 is formed at the lower rear corner of the refrigerator box 1, and a compressor 16, an evaporation container 23, a machine room blower 17 (see FIG. 4), and a machine room condenser 18 are formed in the machine room 22. (See FIG. 4). In the machine room 22, a top wall, a front wall and both side walls are formed by the refrigerator box 1, a bottom wall is formed by the mounting plate 25, and a rear wall is formed by the machine room cover 24. I have. Further, the machine room 22 is formed to be horizontally long over the entire width of the refrigerator box 1, and is configured as a closed space except for a ventilation port including a suction port and a discharge port. The machine room cover 24 is detachably attached to the refrigerator box 1 with screws or the like. The mounting plate 25 is fixed to the lower surface of the outer box 1a with screws or the like. Legs 26 are attached to the mounting plate 25, and a gap is formed between the mounting plate 25 and the floor surface 27.
[0020]
The refrigerator compartment side evaporator 12 is arranged on the back side of the vegetable compartment 3. The refrigerating compartment side blower 13 is a blower for cold air ventilation dedicated to the refrigerating compartment side evaporator 12, is disposed in the evaporator compartment of the refrigerating compartment side evaporator 12, and cools the cold air from the refrigerating compartment side evaporator 12 to the refrigerating compartment 2. And supply it to the vegetable room 3. The freezing room side evaporator 14 is disposed on the back side of the switching room 4, the ice making room 5, and the freezing room 6. The freezer-side blower 15 is a cool air ventilator dedicated to the freezer compartment evaporator 14, is disposed in the ventilation path of the freezer compartment evaporator 14, and switches the cool air from the freezer compartment evaporator 14 to the switching room 4 and the ice making room 5. To the freezer 6. Refrigerant is supplied to each evaporator 12 and 14 by a compressor 16, and each of them forms a part of a refrigeration cycle to perform a cooling operation. Water discharged from the refrigerating compartment side evaporator 12 and the freezing compartment side evaporator 14 is guided to an evaporating container 23 in the machine room 22 and is evaporated using heat generated in the compressor 16.
[0021]
As shown in FIG. 3, the refrigeration cycle includes a compressor 16, a machine room condenser 18 using a cross-fin tube type heat exchanger, a box condenser 19 with a refrigerant pipe embedded type, a dew-prevention heat radiation pipe 20, The first capillary 21a and the refrigerating compartment side evaporator 12a or the second capillary 21b, the freezing compartment side evaporator 12b, and the compressor 16 are connected in this order by piping to form a refrigerating cycle. The capillary 21 includes a first capillary 21a and a second capillary 21b, and the evaporator 12 includes a first evaporator 12a and a second evaporator 12b.
[0022]
The compressor 16 and the machine room condenser 18 are arranged in the machine room 22 and are forcedly ventilated by the machine room blower 17. The box condenser 19 is a natural convection type condenser in which a refrigerant tube is embedded by contacting one side surface of the outer box 1a within the heat insulating wall 1c of the refrigerator box 1. The dew-prevention radiating pipe 20 is arranged between the outer box 1a and the heat insulating material 1c along the front opening of the refrigerator box 1 to prevent dew on the front part of the outer box 1a.
[0023]
Then, the refrigerant is compressed by the compressor 16 to become high temperature and high pressure to reach the machine room condenser 18 as shown by the arrow in FIG. 3, and is radiated by the machine room condenser 18 to lower the temperature. The heat is further radiated by the body condenser 19, and the front surface of the outer box 1 a is heated by the dew-prevention radiating pipe 20 to prevent the dew. The flow is reduced by the first capillary 21 a and reaches the refrigerator-evaporator 12 a. The pressure is reduced by the second capillary 21b and diverted into a flow that reaches the freezer compartment side evaporator 12b, and is evaporated by the respective refrigerating compartment side evaporator 12a and freezer compartment evaporator 12b to remove heat from the surroundings. Then, the process returns to the compressor 16, and the above operation is repeated to perform the cooling operation.
[0024]
The flow to the refrigerating compartment side evaporator 12a and the freezing compartment side evaporator 12b is controlled by a valve (not shown). The machine room blower 17 is operated during the operation of the refrigeration cycle, and forcibly ventilates the compressor 16 and the machine room condenser 18 to radiate heat.
[0025]
In this refrigeration cycle, the amount of heat radiation is increased by using a cross fin tube type machine room condenser 18 as described later, so that the box condenser 19 of the refrigerator box 1 can be greatly reduced. . Therefore, heat intrusion from the box condenser 19 into the storage room can be significantly reduced, power saving of the refrigerator can be achieved, and the box condenser 19 at the time of disposal of the refrigerator is separated from the heat insulating wall 1c. Separation becomes easy, and disposal of the refrigerator can be easily performed. In addition, you may make it reduce the box body condenser 19 by further increasing the heat radiation amount of the machine room condenser 18.
[0026]
Next, a detailed configuration of the machine room 22 will be described with reference to FIGS. FIG. 4 is a rear view showing the machine room of the refrigerator of FIG. 1, FIG. 5 is a rear perspective view of the machine room, FIG. 6 is a perspective view of a single unit of the machine room condenser arranged in the machine room, FIG. 7 is a rear view of a machine room cover attached to the machine room portion. 4 and 5 show a state where the machine room cover 24 is removed.
[0027]
The machine room 22 is formed of a substantially rectangular parallelepiped space that is long and long, that is, a space whose vertical dimension is larger than its depth dimension and whose horizontal width dimension is larger than its vertical dimension. Specifically, the upper part of the front wall part is inclined, and the central part of the rear part slightly projects rearward. The compressor 16 is arranged on one side of the machine room 22 in the left-right direction, and the machine room condenser 18 is arranged on the other side of the machine room 22 in the left-right direction. The machine room blower 17 is composed of a propeller type blower, and is arranged at a mouth ring 41 portion of a partition plate 40 that separates a space where the compressor 16 is arranged and a space where the machine room condenser 18 is arranged. A mouth ring 41 provided on a partition plate 40 for partitioning a ventilation path from the machine room condenser 18 to the compressor 16 is disposed so as to protrude more than half in the axial direction toward the machine room condenser 18 from the mouth ring 41. The machine room blower 17 has a function of sucking air as shown by an arrow 28 in FIGS. 4 and 5 and discharging air as shown by an arrow 29, and the compressor 16 and the compressor 16 arranged in the machine room 22. Forcibly ventilates the machine room condenser 18. The ventilation path from the machine room condenser 18 to the machine room blower 17 is closed around the refrigerator box 1, the mounting plate 25, the machine room cover 24, the fixtures 33 to 35, and the like. A semi-closed space in which the fin gap and the gap between the machine room blower 17 are opened, and the machine room condenser 18 is arranged so that a surface having a large area faces the semi-sealed space.
[0028]
As shown in FIG. 5, the air suction part into the machine room 22 includes a bottom surface suction port 30 formed in the mounting plate 25, a box body suction port 31 formed in the refrigerator box 1, and FIG. As shown in the drawing, a cover suction port 42 is formed on one side of the machine room cover 24. The bottom suction port 30 is formed by a number of slit-shaped openings formed in the mounting plate 25 located on the suction side of the machine room blower 17 and below the horizontal portion 18c of the machine room condenser 18. Further, the box suction port 31 is formed by a ventilation path in which a corner of the refrigerator box 1 facing the machine room 22 is cut out, and is located in front of the suction side of the machine room condenser 18. Further, the cover suction port 42 is formed by a number of slit-shaped openings formed in the machine room cover 24 located on the suction side of the vertical portion 18d of the machine room condenser 18.
[0029]
The air discharge portion of the machine room 22 has a cover discharge port 43 formed in the machine room cover 24 as shown in FIG. 7 and a corner of the refrigerator box 1 facing the machine room 22 as shown in FIG. And a box outlet 32 formed by a ventilation path with a cut-out portion. The cover discharge port 43 is formed by a large number of slit-shaped openings formed in the machine room cover 24 located on the discharge side of the machine room blower 17. The box outlet 32 is formed substantially symmetrically on the opposite side of the box inlet 31.
[0030]
The machine room condenser 18 includes a refrigerant pipe 18a, a plate-like fin 18b, and fixtures 33 and 34, as shown in a single state in FIG. The refrigerant pipes 18a are formed in a meandering shape by one refrigerant pipe and are formed in one row. Further, the plate-like fins 18b are formed of corrugated fins, and a large number of the plate-like fins 18b are provided side by side so that the refrigerant pipes 18a of the respective rows penetrate, thereby forming a cross-fin type heat exchanger. In this embodiment, the fin interval is 1.5 mm, and the fin interval is preferably in the range of 1.3 mm to 1.8 mm. Furthermore, the fixtures 33 and 34 are located on both sides of the plate-like fin 18b, and are fixed to the refrigerant pipe 18a so that the refrigerant pipe 18a penetrates and projects to both sides. The projecting portion of the refrigerant pipe 18a is formed by a separate bent pipe and welded, thereby forming a meandering bent portion.
[0031]
The machine-room condenser 18 is bent in the longitudinal direction of the refrigerant pipe 18a so as to intersect with the refrigerant pipe 18a, and has an overall L-shape including a horizontal portion 18c and a vertical portion 18d. That is, the entire shape of the machine room condenser 18 is bent so as to have a three-dimensional shape extending in the left, right, front and rear, and up and down directions. The fixing member 33 on one side has a locking piece 33a protruding from the front lower end and a locking piece 33b protruding from the rear upper end. Further, the fixture 34 on the other side has a locking piece 34a having a locking hole and a locking piece 34b having a screw hole. Since corrugated fins are used as the plate-like fins 18b, the strength of the machine room condenser 18 is increased, and mounting and the like can be easily performed.
[0032]
The machine room condenser 18 is positioned horizontally so that the horizontal portion 18c faces the bottom surface suction port 30 and vertically so that the vertical portion 18d faces the outer box 1a forming the side wall of the machine room 22. Then, it is installed in the machine room 22. In other words, the meandering bent portions of the refrigerant pipes 18 are located at the upper and lower parts of the machine chamber 22 and the meandering refrigerant pipes 18 are arranged so as to be arranged in the front-rear direction. Therefore, the bent portion of the refrigerant pipe 18a protruding from the fixture 33 projects in the lateral direction, which is the longitudinal direction of the machine chamber 22, and the bent portion projecting from the fixture 34 projects upward. As a result, the portions of the refrigerant pipes 18a protruding from the fixtures 33 and 34 protrude into a relatively large space in the machine room 22, so that the storage capacity of the machine room condenser 18 is improved and the large machine room Since the condenser 18 can be housed in the machine room 22, the heat radiation of the machine room condenser 18 can be increased.
[0033]
The end of the horizontal portion of the machine room condenser 18 and the projecting portion of the refrigerant pipe 18a extend to a dead space located below the machine room blower 17. Also from this point, the storage capacity of the machine room condenser 18 is improved, and the heat radiation amount of the machine room condenser 18 can be increased. In addition, a part of the part that separates the suction side and the blow-out side of the machine room blower 17 can also be used as the fixture 33 of the machine room condenser 18, so that the ventilation structure can be simplified.
[0034]
A specific installation structure of the machine room condenser 18 is such that one side of the machine room condenser 18 is fixed to the mounting plate 25 via the fixing member 33, and the other side of the machine room condenser 18 is fixed to the fixing member 34 and the fixing member 35. And is fixed to the refrigerator box 1. In this manner, by fixing the machine room condenser 18 over the mounting plate 25 and the refrigerator box 1, it is possible to easily fix it.
[0035]
More specifically, the installation structure of the machine room condenser 18 will be described. The machine room condenser 18 is housed from the rear (back side) of the machine room 22, and the locking piece 33 a located at the front end of the fixture 33 is mounted. It is inserted into a locking hole (not shown) of the mounting plate 25 and locked, and the locking piece 33b located at one rear end is fixed to the rear end of the mounting plate 25 with a screw. The fixing tool 34 fixes the fixing tool 35 via locking pieces 34a and 34b, and fixes the locking piece 35a of the fixing tool 35 to the rear surface of the refrigerator box 1. Thus, the machine room condenser 18 is fixed to the refrigerator box 1.
[0036]
When the machine room blower 17 is operated, the air 28 sucked into the machine room 22 from the bottom suction port 30 mainly exchanges heat through the horizontal portion 18c of the machine room condenser 18 and the cover suction port. 42 and the air 28 sucked from the box body inlet 31 mainly exchange heat through the vertical portion 18d of the machine room condenser 18, and the heat exchanged air 28 is transferred from the machine room blower 17 to the compressor 16 side. After being blown out and the air 29 undergoing heat exchange with the compressor 16, the air 29 is discharged from the cover discharge port 43 and the box discharge port 32 to the outside of the machine room 22.
[0037]
Since the machine room condenser 18 is constituted by a cross fin tube type heat exchanger having plate-shaped fins 18b, the heat transfer area per occupied volume can be significantly increased as compared with the conventional spiral fin type condenser, A large amount of heat radiation can be obtained even in the narrow machine room 22.
[0038]
Further, since the machine room condenser 18 is formed in an L-shape including a horizontal portion and a rising portion, the heat transfer area can be increased while suppressing an increase in ventilation resistance, and the heat radiation amount can be reduced. Can increase. In this case, since the corner of the refrigerator box 1 is cut out to form the box suction port 31, it is possible to secure a portion for attaching the legs 26 to the placement plate 25 and to secure the strength of the placement plate 25. However, it is possible to obtain a sufficient suction air flow into the L-shaped machine room condenser 18 having an increased suction area.
[0039]
In this embodiment, a cross-fin type heat exchanger in which a number of plate-like fins 18b are juxtaposed to a meandering refrigerant pipe 18a is used as a machine room condenser 18 and forcedly ventilated by a machine room blower 17 to form a wide space. Since the machine room condenser 18 is arranged so that the surface having the area faces the semi-enclosed space, the heat transfer area per occupied volume in the small machine room 22 can be increased, and the heat transfer of the machine room condenser 18 can be performed. The performance can be improved, and thereby the power saving of the refrigerator can be achieved. In particular, since the plate-like fins 18b of the machine room condenser 18 are formed in a waveform and the fin pitch is set in a range of 1.3 mm to 1.8 mm, the machine room condenser 22 installed in the narrow machine room 22 is formed. The heat exchanger 18 can have a large heat transfer area and high heat transfer performance with appropriate ventilation resistance, and the performance of the machine room condenser 18 can be significantly improved.
[0040]
Further, the machine room blower 17 is constituted by a propeller type blower which is arranged so as to protrude from the mouth ring 41 provided on the partition plate 40 toward the machine room condenser 18, and an air passage from the machine room condenser 18 to the machine room blower 17. Is closed to form a semi-enclosed space in which the fin gap of the machine room condenser 18 and the gap of the machine room blower 17 are opened, and furthermore, the machine room condenser 18 is arranged such that a surface having a large area faces the semi-enclosed space. In the case where dust adheres to the suction-side end face of the machine room condenser 18 and becomes clogged, air in the ventilation path from the machine room condenser 18 to the machine room blower 17 is disposed. Is stirred by a machine room blower 17 protruding into the ventilation passage, and air flows into and out of the semi-enclosed space through the machine room blower 17, and the machine room condenser 18 is cooled by air in the semi-enclosed space side. That. Thus, even if the suction side of the machine room condenser 18 is clogged, a decrease in the performance of the machine room condenser 18 can be suppressed, and the operation performance of the refrigerator can be ensured. In particular, since the machine room blower 17 is projected more than half in the axial direction from the mouth ring 41 to the machine room condenser 18 side, dust and the like adhere to the suction-side end face of the machine room condenser 18 and become clogged. In this case, the stirring by the machine room blower 17 and the flow of air into and out of the semi-enclosed space can be increased, and the cooling of the machine room condenser 18 can be remarkably improved.
[0041]
Further, a cross-fin type heat exchanger in which a number of plate-like fins 18b are arranged side by side in a meandering refrigerant pipe 18a is used as the machine room condenser 18, and the machine room 22 is formed in a space whose vertical dimension is larger than the depth dimension. The machine chamber condenser 18 is installed such that the meandering bent portions of the refrigerant pipes 18a are located at the upper and lower portions and the meandering refrigerant pipes 18a are arranged in the front-rear direction, so that they do not directly contribute as a heat transfer part. The front-rear width of the portion where the meandering bent portion of the refrigerant pipe 18a is located is reduced, so that the machine room condenser 18 having a large heat transfer area and a large ventilation area even in the narrow machine room 22 can be provided. This makes it possible to reduce the number of meandering bent portions of the refrigerant pipe 18a, thereby achieving an inexpensive configuration. Further, the performance of the machine room condenser 18 is improved, and power saving of the refrigerator can be achieved. In particular, in the case where the bent portion of the refrigerant pipe 18a of the machine room condenser 18 is formed by a separate bent pipe and welded, a significant cost reduction can be achieved by reducing the welding location.
[0042]
Further, a cross-fin type heat exchanger in which a number of plate-like fins 18b are juxtaposed to a meandering refrigerant pipe 18a is used as the machine room condenser 18, and its overall shape extends in the left-right, front-back and up-down directions. Since it is bent so as to have a simple shape, the machine room condenser 18 can have a large heat transfer area and a large ventilation area even in a narrow machine room 22. Thereby, with a simple configuration, the performance of the machine room condenser 18 is improved, and power saving of the refrigerator can be achieved. In particular, the machine room cover is detachably attached to the refrigerator box, and the machine room condenser 18 is formed into a substantially L-shape including a portion facing the bottom wall and a portion facing the side wall of the machine room 22. Since it is formed, a large space is exposed between the machine room blower 17 and the machine room condenser 18 in a state where the machine room cover is removed, and the machine room blower 17 and the machine room condenser are utilized by utilizing this space. Attachment and detachment of 18 and the like can be easily performed. Further, since the machine room condenser 18 is constituted by a single row of cross fin tube type heat exchangers, the ventilation resistance is small and the air volume is increased as compared with the case of comprising a plurality of rows of cross fin tube type heat exchangers. Thus, the air flow to the compressor 16 can be increased to reduce the compressor temperature.
[0043]
Further, the machine room condenser 18 is formed into a substantially L-shaped shape including a horizontal portion 18c facing the bottom wall portion of the machine room 22 and a vertical portion 18d facing the side wall portion. The end of the horizontal portion 18c is attached to the mounting plate 25 via the fixture 33, and the end of the vertical portion 18d is attached to the refrigerator box 1 via the fixtures 34 and 35. Since the suction port 30 is formed in the portion of the mounting plate 25 facing the horizontal portion 18c, it is possible to reduce the power consumption of the refrigerator by increasing the lateral width of the refrigerator box 1 while reducing the power consumption of the refrigerator. For an increasing refrigerator, the horizontal portion 18c of the machine room condenser 18 is extended to be large, and the suction port 30 of the mounting plate 25 is formed large along the same, thereby increasing the capacity of the machine room condenser 18. Can increase the machine Without significantly changing the mounting structure of the condenser 18, can be shared fixtures 33-35 and production methods, it is possible to inexpensively and easily cope. In particular, since the suction port 42 and the discharge port 43 are formed on the left and right sides of the machine room cover 24, the ventilation resistance can be reduced and the air volume can be increased, and the performance of the machine room condenser 18 can be improved and the refrigerator can be improved. It is easy to cope with a refrigerator whose capacity is increased by increasing the width of the box 1 by increasing the width while keeping the left and right suction ports 42 and the discharge port 43 of the machine room cover 24 at the same position on both sides. can do.
[0044]
Further, the machine room condenser 18 is formed in a substantially L-shape comprising a portion facing the bottom wall portion and a portion facing the side wall portion of the machine room 22, and the machine room blower 17 is condensed by the mouth ring 41. Since it is composed of a propeller type blower protruding to the side of the fan 18 and is arranged above a portion facing the bottom of the bottom of the machine room condenser 18, the axial size (thickness) of the machine room blower 17 can be easily made. And the air volume can be increased to improve the condenser performance.
[0045]
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 8 is a rear view showing the machine room of the refrigerator according to the second embodiment of the present invention.
[0046]
In the present embodiment, a flat machine room condenser 18 is constituted by a cross-fin type heat exchanger in which plate-like fins 18b are arranged side by side over a plurality of rows of refrigerant pipes 18, and this machine room condenser 18 is used as a machine. This is different from the first embodiment in that it is installed vertically on the suction side of the room blower 17, and the other points are basically the same as the first embodiment. In this embodiment, the shape of the machine room condenser 18 is simple and can be manufactured at low cost, and it is easy to apply the refrigerator box 1 having a small width.
[0047]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, while the performance of a machine room condenser can be improved and power saving can be achieved, even if dust etc. adhere and the suction side of a machine room condenser is clogged, the deterioration of the machine room condenser performance is reduced. Thus, it is possible to obtain a refrigerator capable of ensuring the operation performance of the refrigerator by suppressing the above.
[0048]
Further, according to the present invention, it is possible to obtain a refrigerator capable of improving the performance of a machine room condenser and saving power with an inexpensive configuration.
[0049]
Further, according to the present invention, it is possible to obtain a refrigerator which has good assemblability of components in a machine room, can improve the performance of a machine room condenser, and can save power.
[0050]
Further, according to the present invention, it is possible to obtain a refrigerator which can easily cope with a change in capacity due to a change in the width of the refrigerator box, and which can improve the performance of the machine room condenser and save power.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a refrigerator according to a first embodiment of the present invention.
FIG. 2 is a front view of the refrigerator of FIG.
FIG. 3 is a refrigeration cycle diagram of the refrigerator of FIG. 1;
FIG. 4 is a rear view showing a machine room of the refrigerator of FIG. 1;
FIG. 5 is a rear perspective view of the machine room.
FIG. 6 is a perspective view showing a single state of a machine room condenser arranged in the machine room portion.
FIG. 7 is a rear view of a machine room cover attached to the machine room portion.
FIG. 8 is a rear view showing a machine room of a refrigerator according to a second embodiment of the present invention.
FIG. 9 is a rear view showing a machine room of a conventional refrigerator.
FIG. 10 is a perspective view showing a part of a machine room condenser used in the refrigerator.
FIG. 11 is a refrigeration cycle diagram of the refrigerator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Refrigerator box, 1a ... Outer box, 1b ... Inner box, 1c ... Insulation material, 2 ... Refrigerator room, 3 ... Vegetable room, 4 ... Switching room, 5 ... Ice making room, 6 ... Freezing room, 7-11 ... Door: 12: refrigerator compartment side evaporator, 13: refrigerator compartment side blower, 14: freezer compartment side evaporator, 15: freezer compartment side blower, 16: compressor, 17: machine room blower, 18: machine room condenser, 18a: refrigerant pipe, 18b: plate-like fin, 18c: horizontal part, 18d: vertical part, 19: box condenser, 20: heat radiation pipe for preventing dew, 21: capillary, 21a: first capillary, 21b: second Capillary, 22 Machine room, 23 Evaporation container, 24 Machine room cover, 25 Mounting plate, 26 Leg, 27 Floor, 28 Suction side air, 29 Suction side air, 30 Suction bottom , 31 ... box body inlet, 32 ... box body outlet, 33-35 ... fixture, 40 ... partition plate, 1 ... mouse ring, 42 ... cover the suction port, 43 ... cover the discharge port.

Claims (5)

Machine room is disposed in a corner portion of the lower back, the compressor, the refrigerator curdled condenser and the compressor evaporator comprises a refrigerating cycle connected by refrigerant pipes and the front Kiko condenser provided in the machine room ,
The machine room is formed to be horizontally long over the entire width of the refrigerator box, and the refrigerator box, the mounting plate, and the machine room cover form a top portion, a front portion, both side portions, a bottom portion, and a back portion. except for vents made of the suction port and the discharge port is composed of a closed space Te, the compressor is disposed in the left-right direction one side, the left and right directions other side is disposed before Kiko condenser, A partition plate that partitions a space in which the compressor is disposed and a space in which the condenser is disposed, and a partition plate that partitions a ventilation path from the condenser to the compressor, and is disposed in a mouth ring portion of the partition plate. A compressor and a machine room blower forcibly ventilating the condenser,
Before Kiko condenser is a cross fin tube type heat exchangers arranged a number of plate-like fins in the refrigerant pipe formed in meandering shape, the machine room and the horizontal portion facing the bottom of the machine room A side portion facing the side portion, the horizontal portion extends below the machine room blower, the side portion extends to the top surface portion,
Before air passage extending from Kiko condenser in the machine chamber blower is a semi-sealed space around the fin gaps and gap opening in the machine room blower Kiko condenser before being closed, the suction port of the machine room Provided on the suction side of the condenser,
The refrigerator, wherein the machine room blower is a propeller-type blower arranged to protrude toward the condenser side from the mouth ring portion provided on the partition plate . According to claim 1, refrigerator which is projected larger than half the axial dimension of the machine room air blower into the machine room condenser side of the mouth ring provided on the partition plate. Oite to claim 1, a refrigerator, characterized in that has set the fin pitch from 1.3mm in a range of 1.8mm while corrugated plate-like fin of the machine room condenser. In Claim 1, the machine room is formed in a space whose vertical dimension is larger than the depth dimension, the compressor is installed on one side in the left-right direction, and the machine room condenser is installed on the other side in the left-right direction, The machine room blower is installed between the machine room condenser and the compressor, and the machine room condenser is a cross fin tube in which a number of plate-like fins are juxtaposed to a meandering refrigerant pipe. constructed in the form heat exchanger, refrigerator the refrigerant pipe formed in a serpentine shape that has established so as to line up in the front-rear direction together with the meandering curved part of the refrigerant pipe is located above and below the machine room. 2. The suction port according to claim 1 , wherein a suction port is formed in a machine room cover portion located between the machine room condenser and a side wall portion of the refrigerator box, and a discharge port is formed in a portion of the partition plate located on the compressor side. Refrigerator characterized by forming.

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