JP2003222459A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve heat exchange efficiency of a condenser by sufficiently securing wind velocity of outside air for performing a heat exchange with the condenser installed at the bottom part of the refrigerator. <P>SOLUTION: The condenser 6 is installed so that a suction surface 6b of the condenser may be directed to the bottom surface of a main body of the refrigerator and a blow-off surface 6c of the condenser may be communicated with a machine chamber 4. By a cooling fan 2 provided in the machine chamber 4, outside air is sucked from the surrounding of the bottom surface of the main body of the refrigerator, and the condenser 6 and a compressor 1 are cooled in this order. By separating a portion from the gas blow-off surface 6c of the condenser up to an entrance 11 of the machine chamber 4 from the surrounding of the bottom surface of the main body of the refrigerator, outside air sucked from a space between the main body of the refrigerator and a floor surface is sucked from the suction surface 6b of the condenser. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improving heat dissipation efficiency of a condenser in a refrigerator.

[0002]

2. Description of the Related Art As a conventional refrigerator in which a condenser constituting a refrigeration cycle is installed at the bottom of a refrigerator body, a conventional refrigerator has been disclosed.
There is one disclosed in Japanese Patent Publication No. 0-310473. FIG. 29 is a cross-sectional plan view of an essential part showing the structure of a conventional refrigerator,
FIG. 30 is a vertical sectional side view of a main part. The machine room 4 is provided in the lower part rear side of the refrigerator main body by a partition wall 18 and a back cover 19. The machine room 4 includes a compressor 1 and an evaporation dish 20.
And the cooling fan 2 is installed.

The intake duct 21 is formed by a space surrounded by the bottom surface, both side surfaces and the partition wall 18 of the refrigerator main body. The inlet 22 is provided on the front surface of the refrigerator main body and the outlet 26 is provided on the machine room 4 side. Is open. Inside the intake duct 21, a spiral tube type condenser 24 is installed,
The gaps 25a and 25b between the intake duct 21 and the condenser 24 are
It is narrower than the fin pitch of the condenser 24. The outside air taken in from the suction port 22 by operating the cooling fan 2 cools the condenser 24 in the intake duct 21 and the discharge port 2
6 flows into the machine room 4, passes through the upper part of the evaporating dish 20 and the cooling fan 2, cools the compressor 1, and is discharged from the outlet 23 to the outside of the refrigerator. The flow of outside air in the intake duct 21 is the condenser 2
Since the gaps 25a and 25b with respect to 4 are made narrower than the fin pitch of the condenser 24, they flow in the condenser 24 without being biased into the gaps 25a and 25b.

[0004]

The conventional refrigerator is constructed as described above, and since the outside air from the front surface flows so as to intersect with almost all the refrigerant pipes of the condenser 24, the outside air is condensed by the condenser 24. The flow resistance when flowing through becomes large. Therefore, there is a problem in that the wind speed of the wind hitting the condenser 24 cannot be sufficiently secured, and the heat exchange amount of the condenser 24 is reduced. Further, in the machine room side portion of the condenser 24, the air that has been heat-exchanged and warmed in the front condenser 24 flows, so that the temperature difference between the temperature of the refrigerant flowing through the refrigerant pipe and the condenser 24 is reduced. There was a problem that the amount of heat exchange was reduced.

The present invention has been made in order to solve the above problems, and improves the heat radiation performance of the condenser by forming an air passage for the outside air so that the condenser can efficiently exchange heat. The purpose is to obtain a refrigerator that can save energy consumption.

[0006]

A refrigerator according to claim 1 of the present invention has a cooling fan installed in a machine room for sucking outside air from the periphery of the bottom of the refrigerator body, and a blower surface communicating with the machine room. A condenser provided so as to face the floor surface, so that the outside air sucked from between the bottom surface and the floor surface of the refrigerator main body by the cooling fan is sucked from the suction surface of the condenser, Partitioning means for partitioning the surroundings up to the entrance of the machine room.

The condenser of the refrigerator according to the second aspect of the present invention is characterized in that it is a plate fin heat exchanger.

Further, the partitioning means of the refrigerator according to the third aspect of the present invention is characterized in that it is constructed so as to suck the outside air also from the side surface of the condenser.

Further, the refrigerator according to the fourth aspect of the present invention is characterized in that the condenser is installed so as to be inclined such that a portion near the gas suction surface of the cooling fan is downward.

According to a fifth aspect of the present invention, a refrigerator is provided with a compressor housed in the machine room, and the cooling fan has a gas suction surface directed toward an inlet side of the machine room and a gas discharge surface described above. It is arranged in the machine room so as to face the compressor side, and is arranged so that the angle (Θ) formed by the gas blowing surface and the front surface of the refrigerator body is 45 ° ≦ θ ≦ 90 °. It is characterized by that.

Further, the refrigerator according to claim 6 of the present invention is provided with a resistor for adding resistance to the outside air sucked into the suction surface of the condenser at a portion near the inlet of the machine room. To do.

Further, a refrigerator according to a seventh aspect of the present invention is provided with a straightening plate below the suction surface of the condenser for guiding outside air flowing under the condenser to the suction surface of the condenser. It is characterized by that.

Further, the refrigerator according to the eighth aspect of the present invention is characterized in that at least the condenser on the inlet side of the machine room is formed in a plurality of layers.

A refrigerator according to a ninth aspect of the present invention includes a partition plate which divides the gas blown from the blowing surface of the condenser into a plurality of air passages and guides the gas to the inlet of the machine room. It is what

In the refrigerator according to the tenth aspect of the present invention, the fin pitch of the condenser near the inlet of the machine chamber is made narrower than the fin pitch of the portion far from the inlet of the machine chamber. It is a feature.

The refrigerator according to an eleventh aspect of the present invention is characterized in that the condenser is divided into a plurality of pieces and the refrigerant pipes of the adjacent condensers are arranged so that the stacking directions thereof are different. is there.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 and 2 relate to a refrigerator according to Embodiment 1, FIG. 1 is a plan configuration diagram of a refrigerator bottom, and FIG. 2 is a side view showing a side of a condenser at the bottom of the refrigerator with an open side. In the figure, 1 is a compressor, 2 is a cooling fan, 2a is a gas suction surface of the cooling fan 2, 2b is a gas blowing surface of the cooling fan 2, 3 is a fan duct, and these are stored in the machine room 4. There is. 4a is a gas outlet of the machine room 4, for example, an exhaust port, 5 is a partitioning means, 6 is a condenser, 6a
Is a refrigerant pipe of the condenser 6, 6b is a suction surface of the condenser 6 here, a gas suction surface here, 6c is a blowing surface of the condenser 6 here, a gas discharge surface here, 7 is a suction port of outside air around the refrigerator, and 7a is The lower surface opening of the refrigerator, 8 is a duct top plate, 9 is a duct for sucking outside air, 10 is an air passage formed between the gas outlet surface 6c of the condenser and the duct top plate 8, and 11 is a machine. The gas inlet of the chamber 4 is, for example, a discharge port, 15a is a gap between the lower surface opening 7a and the floor surface, 16a is the front surface of the refrigerator main body, and 16b is the lower surface of the refrigerator main body.

The duct 9 is an air passage surrounded by, for example, the partition means 5 and the duct top plate 8. The condenser 6 is installed in a duct 9 formed at the bottom of the refrigerator main body, and spreads over almost the entire area of the lower surface 16b of the refrigerator main body except the machine room 4, and the stacking direction of the refrigerant pipes 6a is , For example, the refrigerator is installed from the front to the back. Therefore, the refrigerant is mainly the lower surface 1 of the refrigerator body.
It flows in the direction along 6b, and when viewed from the front side of the refrigerator body, it flows from the front to the rear while flowing from side to side. And
The surface 6b of the condenser 6 arranged so as to face the floor is referred to as a suction surface, here, a gas suction surface 6b, and a surface 6c communicating with the machine chamber 4 through the discharge port 11 is a blow surface, here a gas blow surface. It is referred to as surface 6c.

An example of a perspective view of the partition means 5 is shown in FIG.
The partitioning means 5 is made of plastic, metal, or the like, and serves to guide the outside air sucked from around the bottom of the refrigerator main body by the cooling fan 2 and the condenser 6 so as to exchange heat with each other. That is, the gas blowing surface 6c of the condenser by the partitioning means 5
By separating the air passage 10 from the discharge port 11 to the periphery of the bottom of the refrigerator body, the outside air sucked from the suction port 7 between the refrigerator body and the floor surface is sucked from the gas suction surface 6b of the condenser. Then, the gas flows from the gas outlet surface 6c to the machine room 4. Specifically, the lower surface 1 of the refrigerator body
Machine room side partitioning means 5 is used as partitioning means 5 for blocking outside air flowing from 6b to a portion other than the gas suction surface 6b of the condenser.
a, side partitioning means 5b and 5d, and front partitioning means 5c, and an opening 7a is formed in the gas suction surface 6b of the condenser. Further, as the partitioning means 5 for blocking the outside air flowing from the front surface 16a of the refrigerator body to the portion other than the gas suction surface 6b of the condenser, a condenser front surface partitioning means 5f is provided,
The partitioning means 5 for blocking outside air flowing from the side surface of the refrigerator main body to a portion other than the gas suction surface 6b of the condenser includes condenser side surface partitioning means 5e and 5g. Therefore, the condenser 6 of the side view shown in FIG. 2 is actually the condenser side partitioning means 5e.
Covered in.

The duct 9 provided with the condenser 6 communicates with the machine chamber 4 via the discharge port 11. An air passage 10 serving as a communication passage from the gas blowing surface 6c of the condenser to the machine room 4.
Is provided with a duct top plate 8 on the upper side, and is partitioned from a portion forming a refrigerating room or a freezing room of a refrigerator. Here, the size of the lower surface opening 7a opening to the lower surface 16b of the refrigerator body under the condenser 6 is approximately the same as the gas suction surface 6b of the condenser installed facing each other.

Further, between the lower surface 16b of the refrigerator main body and the floor surface of the place where the refrigerator is installed, since the outside air is sucked through the suction port 7 in the surroundings, a gap 15a which is a passage for the outside air is required. Usually, at the bottom of the refrigerator body, there are moving means such as casters and fixing legs. Therefore, there is a gap of about several cm between the lower surface 16b of the refrigerator body and the floor surface, and this gap is sufficient. Front 1 of the bottom of the refrigerator body
6a is provided in such a range that the front cover that covers the internal structure does not hit the floor surface from the appearance from the front. Similarly, the side surface of the lower part of the refrigerator body is, for example, the lower surface 1 of the refrigerator body.
The lower surface 16 of the refrigerator body is covered by the side wall surface up to 6b.
Caster-like clearance 15a formed between b and the floor surface
The ambient outside air is introduced into the lower surface opening 7a through the.

Further, the condenser 6 is installed horizontally or at an angle so that the discharge port 11 side, which is a portion close to the gas suction surface 2a of the cooling fan 2, is lower than the refrigerator front surface 16a side.

Further, the cooling fan 2 is installed in the machine room 4, the gas suction surface 2a of the cooling fan 2 faces the discharge port 11 side which is the inlet of the machine room 4, and the gas blowing surface 2b faces the compressor 1 side. It is fixed to face. Further, with respect to the front surface 16a of the refrigerator main body, the gas blowing surface 2b of the cooling fan 2 is arranged at a position forming an angle of 45 ° to 90 ° in the direction of the compressor 1. That is, in this configuration, since the lateral direction of the machine room 4 is parallel to the front surface 16a of the refrigerator body, 45 ° ≦ Θ ≦ 90 °, as shown in FIG. Further, the discharge port 11 is a passage through which the outside air flows from the duct 9 to the machine room 4 in which the cooling fan 2 is provided, and the maximum height can be obtained without any obstacle between the discharge port 11 and the condenser 6. Deploy.

Next, the operation will be described. The high-pressure gas refrigerant discharged from the compressor 1 enters the condenser 6. While flowing through the refrigerant pipe 6a of the condenser 6, heat is exchanged with the outside air sucked from the lower surface opening 7a, and the heat is radiated. After that, the refrigerant circulating in the refrigeration cycle evaporates in the evaporator (not shown) to cool the inside of the refrigerator and returns to the compressor 1. On the other hand, the cooling fan 2
As a result, the outside air around the bottom of the refrigerator body passes through the suction port 7 formed in the gap between the front cover of the refrigerator body or the partition means 5 and the floor surface, and the lower surface 16b of the refrigerator body.
Is captured on the lower side of. Further, since only the lower surface opening 7a is opened and the other portion is partitioned by the partitioning means 5, it is taken into the duct 9 from here, cools the condenser 6, and then flows from the discharge port 11 to the machine chamber 4. Further, the gas is blown to the compressor 1, and when the compressor 1 is cooled, the temperature is raised and the gas is discharged from the exhaust port 4a.

In the condenser 6, the refrigerant is the lower surface 16 of the refrigerator body.
The refrigerant pipes 6a are stacked so as to flow in the direction along b. The lower surface opening 7a opens to the lower surface 16b of the refrigerator main body so as to face the gas suction surface 6b of the condenser, and the size thereof is approximately the same as the size of the portion of the surface of the condenser 6 that contributes to heat exchange. . Specifically, the rectangular frame plates 5a to 5d only around the periphery of which an opening to be the lower surface opening 7a is formed in the central portion.
The condenser 6 is fixed to the bottom of the refrigerator, and the air passage 10
Are fixed to the duct top plate 8 with a gap so that there exists. All the outside air sucked from around the refrigerator body is guided to the duct 9 through the lower surface opening 7a. Since the lower surface opening 7a is opened at substantially the same position so as to face the gas suction surface 6b of the condenser, the lower surface opening 7a extends from the lower surface opening 7a to the duct 9
The outside air that has flowed into the air passes through the gas suction surface 6b of the condenser in a direction intersecting with the flowing direction of the refrigerant and passes through the gas discharge surface 6c of the condenser. While the outside air flows from the gas suction surface 6b of the condenser to the gas discharge surface 6c of the condenser, the condenser 6 is cooled by exchanging heat with the refrigerant pipes 6a and fins of the condenser,
The temperature rises slightly, flows through the air passage 10 surrounded by the condenser 6 and the duct top plate 8, and flows to the discharge port 11. in this way,
Since the outside air flows from the gas suction surface 6b of the condenser to the gas outlet surface 6c, the flow resistance of the outside air is smaller than that of a conventional device having a suction port on the front surface of the refrigerator body, and the speed of the outside air passing through the condenser 6 is small. Is faster, and the heat exchange efficiency of the condenser 6 can be increased.

Regarding the size of the lower surface opening 7a and the surface of the condenser 6, in the present embodiment, the size of the lower surface opening 7a is set so that the condenser 6 is fixed to the frame plates 5a to 5d constituting the partition means 5. Is actually smaller than the gas suction surface 6b of the condenser by the amount of the surroundings. In this way, by making the surface of the portion of the condenser 6 that contributes to heat exchange and the lower surface opening 7a approximately the same size, the condenser 6 is sufficiently cooled by the outside air introduced from the lower surface opening 7a. However, the size of the lower surface opening 7a may be larger than the surface of the condenser 6. For example, when the condenser 6 is fixed to the frame plate on three sides of the side surface and the lower surface opening 7a is widened in the direction of one side, the lower surface opening 7a can be made larger than the surface of the condenser 6. At this time, the direction of increasing the size is a part far from the cooling fan 2,
For example, if it is extended to the portion of the front partitioning means 5c on the lower surface, the amount of intake of the outside air from the direction in which it is difficult to suck the outside air increases, so the heat exchange efficiency of the condenser 6 can be increased. As an example of a method of fixing the condenser 6, the partition means 5 arranged on the lower side of the condenser 6 is fixed, but it is arranged on the side of the condenser 6 or on the rear side of the condenser 6. It may be fixed to a partition surface with the machine room 4 to be formed. Further, it may be fixed to the duct top plate 8 arranged on the upper side of the condenser 6 so as to be hung by a jig or the like.

If a plate fin heat exchanger is used for the condenser 6, for example, a large heat transfer area can be obtained, the heat dissipation performance of the condenser 6 can be improved, and a refrigerator can be obtained which is efficient and saves energy. As an example of the plate fin, a fin made of aluminum, an aluminum alloy, or copper, the fin thickness is 0.1 mm to 0.2 mm, the fin pitch is 2 to 10 mm, and the pipe is made of copper, aluminum, or an aluminum alloy. Use diameters of φ3 to φ7 mm and use one row or more.

Further, the gas blowing surface 2b of the cooling fan 2 is
For example, by installing it at an angle between 45 ° and 90 ° in the direction of the compressor 1 with respect to the front surface 16a of the refrigerator main body, the outside air is sucked in through the lower surface opening 7a, and the condenser 6 and the compressor 1 are smoothly moved in order. Can be flushed. For this reason,
The speed of the outside air passing through the condenser 6 and the compressor 1 is increased, and the condenser 6 and the compressor 1 can be efficiently cooled.

FIG. 4 is a graph showing the installation angle (°) of the cooling fan 2 on the horizontal axis and the air flow rate in the duct 9 in which the condenser 6 is provided on the vertical axis, and shows measured values by experiments. . As is apparent from the figure, the air volume reaches its maximum at about 45 °, and the air volume decreases as the mounting angle is further increased to 90 °. The cooling fan 2 has a function of taking in outside air and exchanging heat with the condenser 6, and a function of sending the gas to the compressor 1 to cool the compressor 1. For this reason, the mounting angle of the cooling fan 2 is set to the gas blowing surface 2
It is necessary for b to face the compressor 1 as much as possible. From this, it is advisable to attach the cooling fan 2 at an inclination angle (Θ) toward the compressor 1 side with respect to the front surface 16a of the refrigerator main body at an angle of 45 ° ≦ Θ ≦ 90 °. From the graph shown in FIG. 4, it is preferable that the value is close to 45 °.

Further, by tilting the condenser 6 so that the machine room 4 side of the condenser 6 is lower than the refrigerator front surface 16a side, the gas of the condenser 6 can be compared with that when the condenser 6 is horizontally arranged. The angle between the blowout surface 6c and the gas suction surface 2a of the cooling fan 2 approaches parallel. Therefore, the outside air that has undergone heat exchange in the condenser 6 is easily sucked into the cooling fan 2 through the air passage 10. In particular, since the outside air is easily sucked in even in the part of the condenser 6 that is away from the cooling fan 2, the outside air can be uniformly passed through the condenser 6, and the heat exchange efficiency of the condenser can be improved. Further, the corner of the portion of the condenser 6 closest to the discharge port 11 which is the inlet to the machine chamber 4 may be tilted downward, and the corner on the diagonal side may be tilted upward so as to be tilted. Compared with the configuration in which one side of the condenser 6 is inclined downward and the side opposite thereto is inclined upward, the gas suction surface 2 of the cooling fan 2 is further increased.
Since a and the gas outlet surface 6c of the condenser face each other, the flow of the outside air can be made smooth, and the heat exchange efficiency of the condenser 6 can be improved.

The material of the partition means 5 is not particularly limited,
Any material that does not allow outside air to pass through may be used, but if the condenser side partitioning means 5e, 5g are made of a strong material such as a metal plate, the condenser 6 can be protected from vibration and shock when the refrigerator is moved. In the partitioning means 5 shown in FIG. 3, the lower surface opening 7a is inclined to the floor so as to be parallel to the gas suction surface 6b according to the inclination of the condenser 6, but the invention is not limited to this. For example, the lower surface opening 7a may be configured to be parallel to the floor surface.

The gas suction surface 2a of the cooling fan 2 and the condenser 6
When and are arranged as shown in FIGS. 1 and 2, basically, the lower side of the condenser 6 is the gas suction surface and the upper side of the condenser 6 is the gas blowing surface. However, considering that the gas suction surface is large, the side surface corresponding to the thickness of the condenser 6 can also be the gas suction portion. That is, in the configuration of FIGS. 1 and 2, the condenser side surface facing the front surface 16a of the refrigerator body and the condenser side surface facing both side surfaces of the refrigerator body are
It can be configured as a gas suction portion, and the side surface of the condenser facing the machine chamber 4 side near the gas suction port 2a of the cooling fan 4 constitutes a gas blowing portion.

Therefore, the condenser side partitioning means 5e, 5g
Is, for example, in a range where outside air does not flow into the air passage 10 on the gas outlet surface 6c side of the condenser, and is opened without being provided in a portion that contacts the side surface of the condenser so as to communicate with the outside around the bottom of the refrigerator main body. You may comprise. With this configuration, the condenser 6 can also exchange heat with the outside air flowing in from the side surface of the condenser, and further, the effect of cooling the condenser 6 can be increased and the heat exchange efficiency of the condenser 6 can be improved.

Further, as shown in FIGS. 5 and 6, an opening 17 for connecting to the duct 9 may be provided in the front surface 16a of the refrigerator body without passing through the lower surface opening 7a. Actually, the outside air sucked from the side surface corresponding to the thickness of the condenser 6 is the refrigerant pipe 6 of the condenser.
After flowing to some extent around a, it flows to the air passage 10 which is a portion having a small flow resistance. Heat can be exchanged while flowing around the refrigerant pipe 6a. For this reason, the whole or a part of the condenser front partitioning means 5f and the front cover are formed as the openings 17, so that the thickness portion of the front surface of the condenser 6, that is, the side surface of the condenser 6 facing the front surface 16a of the refrigerator body. It can be configured such that the outside air is also sucked in and the heat is exchanged with the condenser 6.

The air volume is large near the gas suction surface 2a of the cooling fan 2, and there is a difference in air volume between the front side and the rear side of the condenser 6. Therefore, by sucking the outside air also from the front side of the condenser having a small air volume, the difference in the air volume between the front side and the rear side of the condenser 6 can be reduced, and the outside air can flow more uniformly to each part of the condenser 6. As a result, the amount of heat exchange increases. The opening 17 may be a slit.

When the refrigerator body is installed along a corner or wall surface in the room, the discharge port 1 on the side surface and the rear surface of the refrigerator body
A portion near 1 may be provided with a prevention wall so that the gas discharged from the exhaust port 4a, which is the outlet of the machine room, does not enter the gas suction surface 6b of the condenser again. Since the gas discharged from the exhaust port 4a has been warmed, the temperature is high, and by preventing this gas from entering the gas suction surface 6b of the condenser from the suction port 7 through the lower surface opening 7a, It is possible to prevent the function of cooling the container 6 from being deteriorated.

Further, in the conventional apparatus, since the heat dissipation in the condenser 6 is not sufficient, the heat dissipation pipe may be installed inside the side surface of the refrigerator main body so that the heat is also dissipated from the side surface. However, by configuring as in this embodiment, the heat dissipation required in the refrigeration cycle that constitutes the refrigerator can be covered by the condenser 6, so that the heat dissipation pipe provided inside the side surface of the conventional refrigerator body. Is unnecessary. Therefore, heat from the heat radiation pipe does not enter the refrigerator, the heat load on the refrigerator is reduced, and the refrigerator can be cooled with a small refrigerating capacity. Therefore, the capacity (stroke volume) of the compressor 1 can be reduced and the power for driving the compressor 1 can be reduced, resulting in energy saving. Further, when the ambient temperature of the refrigerator is high in summer, etc., the temperature of the condenser 6 rises. Therefore, the heat radiating pipe installed on the inside of the side surface of the refrigerator body has a large amount of heat entering the refrigerator compartment, which is more than necessary. It will give a heat load. On the other hand, in the refrigerator according to this embodiment, there is no need to provide a heat radiation pipe, and the heat load to the inside of the refrigerator does not increase more than necessary. Also improves.

Further, when configured as in this embodiment,
It is possible to obtain heat dissipation performance more than twice that of the conventional heat dissipation pipe installed inside the condenser and the refrigerator body. Considering that the heat dissipation by the conventional condenser and the heat dissipation pipe is covered by the condenser 6 according to this embodiment, the heat transfer pipe which is the refrigerant pipe 6a of the condenser 6 is at least the heat transfer pipe of the conventional condenser and the heat transfer pipe of the conventional condenser. 1 / of heat dissipation pipe
It is possible to reduce the amount of refrigerant to about 2, and it is possible to reduce the amount of refrigerant charged in the condenser to about 1/2 when maintaining the same heat radiation performance. Specifically, the inner diameter of the heat transfer pipe 6a is the same as the conventional one, and even if the length of the heat transfer pipe 6a is 1/2, the volume is 1/2, and the heat transfer area is 1/2, the same heat radiation is performed. Performance is obtained. The length of the heat transfer pipe 8a is the same as the conventional one, the inner diameter of the heat transfer pipe 6a is set to about 70% of that of the conventional one, and the fin pitch of the condenser 6 is doubled to reduce the volume to 1 /.
2. Even if the heat transfer area is halved, the same heat dissipation performance can be obtained. Since the refrigerant filling amount of the condenser 6 is about 20 to 50%, which is an element constituting the refrigerating cycle of the refrigerator, the volume of the condenser 6 is reduced to 1 / th of the conventional volume as described above.
By reducing it to about 2, the refrigerant filling amount of the entire refrigerator can be reduced to about 10 to 25%. In particular, when HC, which is a flammable refrigerant, is used, the required performance is obtained even if the amount of the refrigerant is reduced, so that the safety is further increased.

Another configuration example of the present invention will be described below. FIG. 7 is a plan view of the bottom of the refrigerator, and FIG. 8 is a side view showing the side of the condenser at the bottom of the refrigerator open. In the figure, 6d is a main condenser and 6e is an auxiliary condenser. In other parts, the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding parts. A main condenser 6d that serves as a condenser is installed inside a duct 9 that serves as an air passage, and a lower surface opening 7a that sucks outside air is provided below a gas suction port 6b of the condenser.
An air passage 10 that connects the gas blowing surface 6c of the condenser and the machine room 4 is provided between the upper surface of the duct and the duct top plate 8. Further, in the air passage 10, an auxiliary condenser 6e is installed near the discharge port 11 near the gas suction surface 2a of the cooling fan 2 to form a part of the condenser. That is, the condenser 6 on the discharge port 11 side is formed by stacking a plurality of stages, for example, two stages of the main condenser 6d and the auxiliary condenser 6e.

Next, the operation will be described. The high-pressure gas refrigerant discharged from the compressor 1 is used as the main condenser 6d and the auxiliary condenser 6
Enter e. Then, while flowing through the refrigerant pipes 6a of the condensers 6d and 6e, heat is exchanged with the outside air sucked from the lower surface opening 7a, and the heat is radiated. In the outside air sucked into the duct 9 through the lower surface opening 7a, the portion of the cooling fan 2 near the gas suction surface 2a tends to easily flow. Therefore, by installing the auxiliary condenser 6e in a portion where the outside air easily flows and increasing the heat transfer area, it is possible to increase the heat radiation amount of the condensers 6d and 6e as a whole.

In this case, a part of the heat exchanger in a portion away from the cooling fan 2 which is a portion where the outside air does not easily flow is connected to the discharge port 1.
The auxiliary condenser 6e may be arranged near 1 or the size of the main condenser 6d may be left unchanged and the auxiliary condenser 6e
May be added and configured. In the former case, since the auxiliary condenser 6e + the main condenser 6d have the same size, there is an effect of increasing the heat radiation amount of the condensers 6d and 6e without increasing costs such as material costs. Further, in the latter case, the heat transfer area becomes large, so that it has an effect of increasing the heat radiation amount of the condensers 6d and 6e more than in the former case.

In the former case, since the size of the surface facing the lower surface opening 7a is smaller than that shown in FIG. 1, the lower surface opening 7a may be made smaller accordingly. However, if the size of the lower surface opening 7a is kept as it is in FIG. 1, more outside air can be sucked in than if it is made smaller. Further, the refrigerant may flow in parallel to the refrigerant pipes of the main condenser 6d and the auxiliary condenser 6e, or the refrigerant may flow in series.

The size of the gas suction surface 6b of the condenser has been described as being spread over almost the entire lower surface 16b of the refrigerator main body except the machine chamber 4. However, since the size of the condenser 6 is determined in consideration of the refrigeration cycle required for the refrigerator, there is a case where it does not have to be a size that spreads over almost the entire lower surface 16b. In such a case as well, the size of the lower surface opening 7a may be configured to be approximately the same as or larger than the gas suction surface 6b of the condenser facing the lower surface opening 7a.

Embodiment 2. 9 and 10 relate to a refrigerator according to Embodiment 2, FIG. 9 is a plan configuration diagram of a refrigerator bottom portion, and FIG. 10 is a side view showing a side surface of a condenser at the refrigerator bottom portion open. In the figure, reference numeral 12 is a resistor, which is, for example, a plastic or metal plate having a large number of slits or holes. Here, the resistor 12 is, for example, partially fixed to a frame plate that constitutes the partitioning means 5 on the machine room 4 side, and is attached to a lower surface opening 7a near the cooling fan 2 in a direction that blocks the inflow of outside air. ing. The size of the resistor 12 is provided so as to cover, for example, the rear half of the lower surface opening 7a on the machine room 4 side. As a result, of the outside air sucked into the gas suction surface 6b of the condenser from the lower side of the lower surface 16b of the refrigerator body to the gas suction surface 6b in the vicinity of the discharge port 11 which is the gas inlet of the machine chamber. Resistance is added to the outside air that is drawn in. In other parts, the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding parts.

Next, the operation will be described. The high-pressure gas refrigerant discharged from the compressor 1 flows into the condenser 6 and exchanges heat with the outside air sucked into the duct 9 from the lower surface opening 7a by the cooling fan 2. As a result, the heat of the condenser 6 is radiated to the outside air and the condenser 6 is cooled. In the flow of the outside air sucked into the duct 9 from the intake port 7, the air passage loss passing through the condenser 6 is different between the portion far from the gas suction surface 2a of the cooling fan 2 and the portion close thereto. Therefore, the wind velocity is high in the portion close to the cooling fan 2 and slow in the portion far from the cooling fan 2. In this embodiment, the resistor 12 is installed in the lower surface opening 7a near the cooling fan 2 to equalize the air passage loss in the portion far from the cooling fan 2 and in the portion near. For this reason,
The outside air is allowed to flow evenly through the condenser 6, and the heat radiation amount of the condenser 6 can be increased.

The resistor 12 may be provided only in a portion near the cooling fan 2 on the lower side in FIG. With such a configuration, the outside air can flow uniformly through the condenser 6, and the heat radiation amount of the condenser 6 can be increased to improve the heat exchange efficiency. Further, the shape and material of the resistor 12 are not limited to the above, but it is provided in the lower surface opening 7a in the portion close to the gas suction surface 2a of the cooling fan 2, that is, in the vicinity of the discharge port 11 of the lower surface opening 7a. Any material may be used as long as it acts to add resistance to the flow of the outside air sucked into the gas suction surface 6b of the condenser.
Further, the frame plates 5a to 5d and the resistor 1 which constitute the partitioning means 5
The two may be integrally formed.

Embodiment 3. 11 and 12 relate to the refrigerator according to the third embodiment, and FIG. 11 is a plan configuration diagram of the refrigerator bottom portion, and FIG. 12 is a side view showing the condenser side surface of the refrigerator bottom portion open. In the figure, 13 is a rectifying plate made of an elastic material such as rubber, and is provided between the lower surface opening 7a and the floor surface, at an intermediate portion between the front surface side and the rear surface side of the lower surface opening 7a, and on the front surface 16a of the refrigerator body. Install in parallel. Here, for example, it has a plate shape, and its lower end is inclined toward the front side so that the outside air flowing under the gas suction surface 6b of the condenser is smoothly guided to the gas suction surface 6b of the condenser. The current plate 13 is fixed to the partition means 5 at a part thereof, for example. In other parts, the same reference numerals as those in FIGS.
The same or corresponding part is shown.

Next, the operation will be described. The high-pressure gas refrigerant discharged from the compressor 1 flows into the condenser 6 and exchanges heat with the outside air sucked into the duct 9 from the lower surface opening 7a by the cooling fan 2. As a result, the heat of the condenser 6 is radiated to the outside air and the condenser 6 is cooled. In the flow of the outside air sucked into the duct 9 from the lower surface opening 7a, the air passage loss passing through the condenser 6 is different between the portion far from the gas suction surface 2a of the cooling fan 2 and the portion close thereto. In this case, the outside air tries to flow to the one with the smaller wind path loss. An explanation of this flow is shown in FIG. That is, a part of the outside air from a portion farther from the cooling fan 2 does not flow into the gas suction surface 6b of the condenser, but crawls the gap 15a between the lower side of the condenser 6 and the floor 15 to cool the cooling fan. When it reaches a portion close to 2, it is introduced into the gas suction surface 6b.

In the structure shown in FIGS. 11 and 12, the current plate 1 is provided in the middle portion of the lower surface opening 7a so as to block the flow of the outside air.
3 are installed. The outside air flowing between the lower side of the condenser 6 and the floor 15 is forcibly guided to the gas suction surface 6b of the condenser by the straightening vanes 13, so that the flow of the outside air becomes as shown in FIG. Therefore, the outside air can flow evenly through the condenser 6, and the amount of heat released from the condenser 6 can be increased, and the heat exchange efficiency can be improved.

Although the material and structure of the current plate 13 are not limited to those described above, the current plate 13 is a material that can be deformed so that it fits easily in the installation place because it has a structure protruding from the bottom of the refrigerator to the floor side. Is preferred.

The rectifying plate 13 shown in FIGS. 11 and 12 has a structure in which the outside air flowing under the refrigerator at the portion of the front surface 16a of the refrigerator main body where the air passage loss is high is guided to the condenser 6. On the other hand, the straightening plate 13 shown in FIGS.
Is a part of the right side of the refrigerator main body, which is far from the gas suction surface 2a of the cooling fan 2 toward the front surface of the refrigerator body, where the air passage loss is high, and the outside air flowing under the refrigerator is discharged to the gas suction surface 6b of the condenser. It is a configuration that leads. Set the rectifying plate 13 to the bottom opening 7a.
Is provided vertically in the lateral direction of the machine room 4.

FIG. 17 is an explanatory view showing the flow of outside air in the duct 9. In the portion farther from the gas suction surface 2a of the cooling fan 2 shown by A and B and the closer portion shown by C,
The air passage loss passing through the condenser 6 is different. Therefore, FIG.
A part of the outside air flowing in from a part farther from the cooling fan 2 (portions A and B in FIG. 17) is not introduced into the gas suction surface 6b of the condenser as shown in FIG. It crawls between the side and the floor 15. Then, when it reaches a portion near the cooling fan 2, it is introduced into the gas suction surface 6b of the condenser. In FIG. 15 and FIG. 16, since the rectifying plate 13 is installed in the middle portion of the lower surface opening 7a perpendicularly to the lateral direction of the machine room 4, it flows between the lower side of the condenser 6 and the floor 15. The outside air can be forcibly guided to the gas suction surface 6b of the condenser. By providing the rectifying plate 13 in this way, the outside air can flow uniformly through the condenser 6, and the amount of heat released from the condenser 6 can be increased. Further, as shown in FIGS. 18 and 19, if the straightening vanes 13 are provided in parallel and perpendicular to the lateral direction of the machine chamber 4, the outside air can be uniformly passed by the condenser 6, and the condenser 6 The heat exchange efficiency of can be further improved. As described above, the number of the current plate 13 is not limited to one, and a plurality of current plates may be provided.

Further, the straightening vane 13 need not be linearly provided, but may be curvedly provided as shown in FIG. Considering the position and direction of the gas suction surface 2a of the cooling fan 2 and the configuration of the condenser 6, the outside air flowing without passing through the condenser 6 is sucked into the condenser in the air passage where the air passage loss is high. Surface 6c
It should be arranged so as to lead to.

In the configurations of FIGS. 11 and 12, the outside air flowing through the portion of the lower side of the refrigerator main body where the air passage loss is low is rectified by the rectifying plate 13.
The heat exchange efficiency of the condenser 6 is improved by introducing it to the gas suction surface 6b of the condenser. On the other hand, in FIGS.
Not only the outside air flowing under the condenser 6 is guided to the gas suction surface 6b of the condenser by the rectifying plate 13, but also the air passage 10 is divided into the first air passage 10a and the second air passage 10b. The outside air that passes through the air and blows off from the gas blowing surface 6c is, for example, 2
It is configured to flow in two. 21 is a plan view of the bottom of the refrigerator, and FIG. 22 is a side view of the bottom of the refrigerator with the side of the condenser open. In the figure, 14 is
It is a partition plate provided in the air passage 10 formed by a gap between the duct top plate 8 and the gas outlet surface 6c of the condenser. In addition, in the middle portion of the lower surface opening 7a, the straightening plate 1 is provided in parallel with the lateral direction of the machine room 4.
Install 3. In other parts, the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding parts.

The air passage 10 is replaced by the first and second air passages 10a and 10b.
The partition plate 14 that is divided into 2 is provided in the air passage 10 substantially parallel to the lower surface 16b of the refrigerator, and extends from the position where the straightening plate 13 is provided to the discharge port 11 that is an inlet to the machine chamber. In the configuration shown in FIGS. 11 and 12, the cooling fan 2
The air passage loss passing through the condenser 6 in the portion far from the gas suction surface 2a is larger than the air passage loss passing through the condenser 6 in the portion closer to the cooling fan 2. Therefore, the amount of outside air guided to the gas suction surface 6b of the condenser on the upstream side of the flow regulating plate 13 becomes smaller than the amount of outside air on the downstream side, and the heat exchange efficiency of the condenser 6 cannot be improved so much. On the other hand, the heat exchange efficiency of the condenser 6 is further improved by configuring as shown in FIGS. The flow of outside air in this configuration will be described. Most of the outside air guided to the gas suction surface 6b of the condenser on the upstream side of the straightening vane 13 by the flow of the outside air by the cooling fan 2 passes through the gas discharge surface 6c of the condenser as it is,
It flows through the first air passage 10 a and flows into the machine room 4 from the discharge port 11. On the other hand, the outside air guided to the gas suction surface 6b of the condenser on the downstream side of the straightening vane 13 passes through the gas discharge surface 6c of the condenser, flows through the second air passage 10b, and is discharged from the discharge port 11 to the machine chamber 4
Flow into.

After the partition plate 14 exchanges heat with the outside of the portion far from the cooling fan 2 with the condenser 6, the first air passage 10a.
The second air passage 10 is provided after the air passage is secured so as to flow to the second air passage, and at the same time, the outside air near the cooling fan 2 exchanges heat with the condenser 6.
An air passage is secured so that it can flow to b. As a result, it is possible to eliminate the unevenness of the flow of the outside air between the portion far from the gas suction surface of the cooling fan 2 and the portion near the gas suction surface, so that the outside air can flow uniformly to the heat exchanger 6 and the heat exchange efficiency of the condenser 6 Can be improved.

It should be noted that two or more partition plates 14 may be provided to secure the air passage through which the outside air blown from the gas blowing surface 6c of the condenser is divided into three or more. Further, here, the configuration example in which the partition plate 14 and the rectifying plate 13 are provided has been described, but even if only the partition plate 14 is provided without providing the rectifying plate 13, the flow of outside air can be made uniform to some extent, which is effective. In addition, in the configuration of the partition plate 14 shown in FIGS. 21 and 22, the straightening vane 13 has a structure as shown in FIGS.
Is provided in parallel to the lateral direction of, and is not limited to this. The partition plate 14 may be provided so as to vertically separate the air passage 10 from the position where the flow straightening plate 13 is provided to the place where the cooling fan 2 is provided. Further, although the partition plate 14 is provided horizontally, the invention is not limited to this, and the partition plate 14 may be provided obliquely according to the inclination of the condenser 6 and the introduction direction of the outside air. Further, the partition wall is not limited to the plate-like one, and may be a curved partition wall. The air passage 10 that guides the outside air blown out from the gas blowing surface 6c of the condenser to the discharge port 11 is divided into a plurality of air passages so that the outside air flows uniformly to the condenser 6 regardless of the distance from the cooling fan 2. Can be configured as.

The heat exchange efficiency of the condenser 6 can be further improved by providing the partition plate 14 also in the air passage 10 having the structure shown in FIGS. 15, 16 and 18 to 20. Further, the partition plate 14 is provided even in the configuration in which the rectifying plate 13 is not provided, and the air passage 10 is divided into a plurality of parts in the vertical direction, whereby the outside air can be evenly flowed to the condenser 6, The heat exchange efficiency of the condenser 6 can be improved.

Fourth Embodiment 23 and 24 relate to a refrigerator according to Embodiment 4, FIG. 23 is a plan configuration diagram of a refrigerator bottom portion, and FIG. 24 is a side view showing a condenser side surface of the refrigerator bottom portion open. In this configuration, for example, the fin pitch of the condenser 6 in the portion near the discharge port 11 which is the inlet of the machine chamber 4 is configured to be narrower than in the far portion. In other parts, the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding parts.

Next, the operation will be described. The high-pressure gas refrigerant discharged from the compressor 1 flows into the condenser 6 and exchanges heat with the outside air sucked by the cooling fan 2 from the lower surface opening 7a to the gas suction surface 6b of the condenser. Thereby, the heat of the condenser 6 is radiated to the outside air and cooled. In the flow of the outside air sucked into the gas suction surface 6b of the condenser from the lower surface opening 7a, the air passage loss passing through the condenser 6 differs between the portion far from the gas suction surface 2a of the cooling fan 2 and the portion near the portion. Therefore, the machine room 4
The wind velocity is distributed in a portion near the discharge port 11 which is the inlet of the cooling fan and a portion far from it, and the wind velocity is high in the portion close to the cooling fan 2 and slow in the portion far. In this configuration, the discharge port 1
By narrowing the fin pitch of the condenser 6 near 1 to increase the air passage loss, the air passage loss in the portion far from the cooling fan 2 and the portion close to the cooling fan 2 is made uniform. As a result, the outside air can flow evenly through the condenser 6, and the heat exchange efficiency of the condenser 6 can be improved.

According to the distance from the cooling fan 2, the condenser 6
In order to make the air passage loss uniform by changing the width of the fin pitch of No. 2, in the configuration shown in FIG. 23, the fin pitch of the rear half close to the machine room 4 is made almost half of the front fin pitch. However, the configuration is not limited to this, and the fin pitch of the portion in the duct 9 where the air passage loss is desired to be increased may be narrowed. For example, the width of the fin pitch may be narrowed only around the ejection port 11.

FIG. 25 and FIG. 26 relate to a refrigerator having another structure according to this embodiment, and are plan views of the bottom of the refrigerator.
FIG. 26 is a side view showing the side of the condenser at the bottom of the refrigerator open. In this configuration, the condenser 6 is divided into two regions, for example, the condenser 6f in the portion near the gas suction surface 2a of the cooling fan 2 and the refrigerant pipe 6a of the condenser 6g on the front side of the refrigerator adjacent to the condenser 6f. The stacking direction is changed to be different. In other parts, the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding parts.

Next, the operation will be described. Condenser 6f,
The high-pressure gas refrigerant flowing in 6 g of the refrigerant pipe 6a is cooled by the cooling fan 2 from the lower surface opening 7a to the gas suction surface 6 of the condenser.
Exchanges heat with the outside air sucked into b. This allows the condenser 6
The heat of f, 6g is radiated to the outside air and the condensers 6f, 6g are cooled. In the flow of the outside air flowing into the gas suction surface 6b of the condenser from the lower surface opening 7a, in this configuration, the stacking direction of the condenser 6f near the gas suction surface 2a of the cooling fan 2 is set to the fins with respect to the flow of the outside air. It is arranged so that the directions of the two intersect. As a result, resistance is given to the outside air flowing through the condenser 6f. As a result, the air passage loss can be made uniform in the part far from the cooling fan 2 and the part near the cooling fan 2.
The outside air comes to flow evenly to f and 6g, and the condenser 6
The heat exchange efficiency of f and 6 g can be improved. Where the condenser 6
Air passage 1 formed between f and 6g and the duct top plate 8
0 is a partition around the bottom of the refrigerator body, condensers 6f, 6g
The side surface of the may be opened. For example, condenser side partitioning means 5e, 5g forming part of the partitioning means 5
An opening may be provided in the. The plate fins at the end of the side surface of the condenser 6f are parallel to the front surface 16a of the refrigerator body. When the side surface of the condenser also functions as a gas suction portion, outside air can be taken in from between the fins, and The heat exchange efficiency of 6f and 6g can be improved.

Also, as shown in FIGS. 27 and 28, the surface of the condenser 6 is divided into left and right regions with respect to the front surface 16a of the refrigerator main body to form condensers 6h and 6i, and the refrigerant is condensed by the condensers 6h and 6i. The piping 6a may be configured so that the stacking direction is different,
Has the same effect. Also at this time, the direction of the fins of the condenser 6h farther from the cooling fan 2 may be taken into consideration so that the outside air can be easily introduced into the gas suction surface 6b of the condenser. Also in this configuration, the air passage 10 formed between the condensers 6h and 6i and the duct top plate 8 is partitioned from the periphery of the bottom of the refrigerator main body, and the side surfaces of the condensers 6h and 6i are open. Good. The outside air can be taken into the duct 9 from the side surface of the condenser 6h through the fins, and the outside air does not flow into the duct 9 from the side surface of the condenser 6i because it is blocked by the fins. Therefore, a large amount of outside air can be introduced into the condenser 6h far from the cooling fan 2, and the heat exchange efficiency of the condensers 6h and 6i can be improved.

Further, in the following points, Embodiments 2 to 2 will be described.
Although the description is omitted in each of the fourth embodiment, the configuration and the operation other than those described are the same as those of the first embodiment, and the same operational effects as those of the first embodiment are achieved. That is, the partition means 5 is provided so as to partition between the air passage 10 communicating from the outlet surface 6c of the condenser to the outlet 11 which is the inlet of the machine chamber 4 and the periphery of the bottom of the refrigerator body. Therefore, the outside air sucked from the suction port 7 between the refrigerator body and the floor surface is sucked from the gas suction surface 6b of the condenser and blown from the gas blowing surface 6c. Therefore, the outside air to be sucked in can be effectively used to radiate heat from the condenser 6, the heat radiation performance of the condenser can be improved, and an efficient and energy-saving refrigerator can be obtained. Further, in heat exchange between the condenser 6 and the outside air, the lower surface opening 7a has a size substantially equal to or larger than that of the condenser 6, and allows a large amount of outside air to pass in a direction intersecting the plane of the condenser 6. For this reason,
The flow resistance of the outside air is small, the speed of the outside air passing through the condenser 6 is higher than that in the conventional device, and the heat exchange efficiency of the condenser 6 can be increased.

Furthermore, for example, the blowing direction of the cooling fan 2 is set at an angle of 45 ° to 90 ° in the direction of the compressor 1 with respect to the front surface of the refrigerator body. This allows
Since the air sucked from the lower surface opening 7a sequentially and smoothly flows to the condenser 6 and the compressor 1, the speed of the outside air passing through the condenser 6 is increased, and the heat exchange efficiency of the condenser 6 can be improved. By improving the heat exchange efficiency, an energy-saving refrigerator can be obtained.

Furthermore, for example, by tilting the condenser 6 near the gas suction surface 2a of the cooling fan 2 downward, the gas suction surface 2 of the cooling fan 2 can be arranged rather than horizontally.
It can be configured such that a and the gas outlet surface 6c of the condenser face each other. Therefore, the outside air is smoothly introduced also from the portion of the duct 9 which is distant from the cooling fan 2, and the outside air can pass through the condenser 6 more uniformly, and the heat exchange efficiency of the condenser can be improved.

Furthermore, a plate fin heat exchanger is used for the condenser, for example. Thereby, the heat dissipation performance of the condenser 6 is improved, and a highly efficient and energy-saving refrigerator can be obtained. As an example of the plate fin, a fin made of aluminum, an aluminum alloy, or copper, the fin thickness is 0.1 mm to 0.2 mm, and the fin pitch is 2 to 10
mm, the pipe is made of copper, aluminum, or an aluminum alloy, the outer diameter is φ3 to φ7 mm, and one row or more is used.

Furthermore, for example, the front surface 16 of the refrigerator main body
An opening is provided in at least a part of the partitioning means 5 of a or the side surface so that the side surface of the condenser sucks the outside air. As a result, more outside air can be introduced into the condenser 6, and the condenser 6
The heat dissipation performance can be improved, and an efficient and energy-saving refrigerator can be obtained.

Furthermore, for example, the discharge port 11 of the air passage 10
The condenser 6 on the side is formed by stacking in a plurality of stages. As a result, the heat transfer area of the portion where the outside air easily flows can be increased to increase the heat radiation amount of the condenser 6, and a highly efficient and energy-saving refrigerator can be obtained.

In the first to fourth embodiments,
Although the description has been given using the condenser 6 in which the refrigerant flows in one pass, the present invention is not limited to this. Even when the refrigerant inlet of the condenser 6 is branched into a plurality of parts to flow through the refrigerant pipe 6a, and the refrigerant outlet of the condenser 6 joins the refrigerant again to circulate the refrigeration cycle, the same effect as above. There is.

[0072]

As described above, according to the first aspect of the present invention, the cooling fan installed in the machine room for sucking the outside air from the periphery of the bottom of the refrigerator main body and the blowing surface communicating with the machine room have the suction surface. A condenser provided so as to face the floor surface, so that the outside air sucked from between the bottom surface and the floor surface of the refrigerator main body by the cooling fan is sucked from the suction surface of the condenser, By providing the partitioning means for partitioning the inlet to the machine room from the surroundings, the heat dissipation performance of the condenser can be improved, and a highly efficient and energy-saving refrigerator can be obtained.

According to the second aspect of the invention, since the condenser is the plate fin heat exchanger, the heat dissipation performance of the condenser can be improved, and an efficient and energy-saving refrigerator can be obtained.

According to the third aspect of the invention, since the partition means is constructed so as to suck the outside air also from the side surface of the condenser, more outside air can be introduced into the duct, and the heat radiation of the condenser can be improved. A refrigerator with improved performance and efficiency and energy saving can be obtained.

Further, according to the invention of claim 4, since the condenser is installed so as to be inclined so that a portion close to the gas suction surface of the cooling fan is downward, a portion apart from the cooling fan is provided. The outside air can be smoothly introduced into the duct through the suction port, the outside air can be evenly passed through the condenser, and the refrigerator having the improved heat exchange efficiency of the condenser can be obtained.

Further, according to the invention of claim 5, the compressor is provided with the compressor housed in the machine room, and in the cooling fan, the gas suction surface faces the inlet side of the machine room and the gas discharge surface is the compression side. It is arranged in the machine room so as to face the machine side, and is arranged so that an angle (Θ) formed by the gas blowing surface and the front surface of the refrigerator body is 45 ° ≦ θ ≦ 90 °. Therefore, since the air sucked from the suction port smoothly flows into the condenser, the speed of the outside air passing through the condenser is increased, and the refrigerator in which the heat exchange efficiency of the condenser can be improved can be obtained.

Further, according to the invention of claim 6, since the resistor for adding the resistance to the outside air sucked into the suction surface of the condenser near the inlet of the machine room is provided, Uniformize the air passage loss in the distant part and near part,
It is possible to obtain a refrigerator in which the heat radiation efficiency of the condenser can be increased to improve the heat exchange efficiency.

Further, according to the invention of claim 7, a straightening plate for guiding the outside air flowing under the condenser to the suction surface of the condenser is provided under the suction surface of the condenser. A refrigerator can be obtained in which the outside air flowing under the condenser is guided to the condenser to increase the heat radiation amount of the condenser and improve the heat exchange efficiency.

Further, according to the invention of claim 8, at least the condenser on the inlet side of the machine chamber is formed by stacking in a plurality of stages, so that the heat radiation amount of the condenser in the portion where the outside air easily flows is increased. As a result, a refrigerator having improved heat exchange efficiency can be obtained.

According to the ninth aspect of the invention, since the gas blown from the blowout surface of the condenser is divided into a plurality of air passages and is guided to the gas inlet of the machine room, the windshield is provided. It is possible to obtain a refrigerator in which the path loss can be made uniform and the heat radiation amount of the condenser can be increased to improve the heat exchange efficiency.

According to the tenth aspect of the invention, the fin pitch of the condenser near the inlet of the machine chamber is made narrower than the fin pitch of the portion far from the inlet of the machine chamber. It is possible to obtain a refrigerator in which the path loss can be made uniform and the heat radiation amount of the condenser can be increased to improve the heat exchange efficiency.

According to the eleventh aspect of the present invention, the condenser is divided into a plurality of parts, and the refrigerant pipes of the adjacent condensers are arranged so that the stacking directions are different. A refrigerator that can increase the heat exchange efficiency can be obtained.

[Brief description of drawings]

FIG. 1 is a plan configuration diagram of a refrigerator bottom portion according to a refrigerator according to Embodiment 1 of the present invention.

FIG. 2 is a side view showing an open side of a condenser at the bottom of the refrigerator according to the first embodiment.

FIG. 3 is a perspective view showing a partition means according to the first embodiment.

FIG. 4 is a graph showing the angle of the cooling fan of the refrigerator according to the first embodiment and the air volume of the duct with respect to the angle.

FIG. 5 is a plan configuration diagram of a refrigerator bottom portion according to the refrigerator according to the first embodiment.

FIG. 6 is a side view showing an open side of the condenser at the bottom of the refrigerator according to the first embodiment.

FIG. 7 is a plan configuration diagram of a bottom portion of the refrigerator according to the refrigerator according to the first embodiment.

FIG. 8 is a side view showing an open side of the condenser at the bottom of the refrigerator according to the first embodiment.

FIG. 9 is a plan configuration diagram of a refrigerator bottom portion according to the refrigerator according to the second embodiment of the present invention.

FIG. 10 is a side view showing an open side of the condenser at the bottom of the refrigerator according to the second embodiment.

FIG. 11 is a plan configuration diagram of a refrigerator bottom portion according to the refrigerator according to the third embodiment of the present invention.

FIG. 12 is a side view showing an open side of the condenser at the bottom of the refrigerator according to the third embodiment.

FIG. 13 is an explanatory diagram showing the flow of outside air at the bottom of the refrigerator according to the third embodiment.

FIG. 14 is an explanatory diagram showing the flow of outside air at the bottom of the refrigerator according to the third embodiment.

FIG. 15 is a plan view of a bottom portion of the refrigerator according to the third embodiment.

FIG. 16 is a side view showing an open side of a condenser at the bottom of the refrigerator according to the third embodiment.

FIG. 17 is a plan view of a bottom portion of the refrigerator according to the third embodiment.

FIG. 18 is a side view showing an open side of the condenser at the bottom of the refrigerator according to the third embodiment.

FIG. 19 is a plan view of a bottom portion of the refrigerator according to the third embodiment.

FIG. 20 is a plan configuration diagram of a bottom portion of the refrigerator according to the refrigerator according to the third embodiment.

FIG. 21 is a plan configuration diagram of a refrigerator bottom portion according to the refrigerator according to the fourth embodiment of the present invention.

FIG. 22 is a side view showing an open side of the condenser at the bottom of the refrigerator according to the fourth embodiment.

FIG. 23 is a plan configuration diagram of a bottom portion of a refrigerator according to the fourth embodiment.

FIG. 24 is a side view showing an open side of the condenser at the bottom of the refrigerator according to the fourth embodiment.

FIG. 25 is a plan configuration diagram of the bottom of the refrigerator according to the refrigerator according to the fourth embodiment.

FIG. 26 is a side view showing an open side of the condenser at the bottom of the refrigerator according to the fourth embodiment.

FIG. 27 is a plan configuration diagram of a refrigerator bottom portion according to the refrigerator according to the fourth embodiment.

FIG. 28 is a side view showing an open side of the condenser at the bottom of the refrigerator according to the fourth embodiment.

FIG. 29 is a cross-sectional plan view of essential parts showing the structure of a conventional refrigerator.

FIG. 30 is a vertical cross-sectional side view of essential parts showing the structure of a conventional refrigerator.

[Explanation of symbols]

1 compressor, 2 cooling fan, 2a gas suction surface, 2b
Gas outlet surface, 3 fan duct, 4 machine room, 4a
Machine room gas outlet, 5 partitioning means, 6 condenser, 6b
Gas suction surface of condenser, 6c Gas blowing surface of condenser, 7
Suction port, 7a lower surface opening, 9 duct, 11 discharge port, 1
2 resistors, 13 straightening plates, 14 partition plates, 15a gaps, 16a front surface of refrigerator body, 16b lower surface of refrigerator body.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Akira Nishizawa             2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo             Inside Ryo Electric Co., Ltd.

Claims (11)

[Claims] 1. A cooling fan installed in a machine room for sucking outside air from the periphery of the bottom of a refrigerator main body, a condenser provided so that a blow surface communicates with the machine room and a suction surface faces the floor, and the cooling fan. By such a way that the outside air sucked from between the bottom surface and the floor surface of the refrigerator main body is sucked from the suction surface of the condenser, the partition means for partitioning from the blow surface of the condenser to the inlet of the machine room with the surroundings, A refrigerator characterized by being equipped. 2. The refrigerator according to claim 1, wherein the condenser is a plate fin heat exchanger. 3. The refrigerator according to claim 1, wherein the partition means is configured to suck the outside air also from the side surface of the condenser. 4. The condenser according to claim 1, wherein the condenser is installed so as to be inclined so that a portion near a gas suction surface of the cooling fan faces downward. refrigerator. 5. A compressor housed in the machine room,
The cooling fan is disposed in the machine chamber so that a gas suction surface faces the inlet side of the machine room and a gas blowing surface faces the compressor side, and the gas blowing surface and the front surface of the refrigerator body are arranged. The refrigerator (1) according to any one of claims 1 to 4, wherein the refrigerator is arranged such that an angle (?) Formed by and is 45 degrees ??? 90 degrees. 6. The resistor according to claim 1, further comprising a resistor for adding resistance to the outside air sucked into the suction surface of the condenser near the inlet of the machine room. The refrigerator according to item 1. 7. A straightening plate for guiding the outside air flowing under the condenser to the suction surface of the condenser below the suction surface of the condenser. The refrigerator according to any one of 6 above. 8. The refrigerator according to any one of claims 1 to 7, wherein at least the condenser on the inlet side of the machine room is formed by stacking it in a plurality of stages. 9. The partition plate according to claim 1, further comprising a partition plate that divides the gas blown from the blowing surface of the condenser into a plurality of air passages and guides the gas to the inlet of the machine chamber. The refrigerator according to item 1. 10. The fin pitch of the condenser near the inlet of the machine room is made narrower than the fin pitch of the portion far from the entrance of the machine chamber. The refrigerator according to any one of items. 11. The condenser according to claim 1, wherein the condenser is divided into a plurality of parts, and the refrigerant pipes of the adjacent condensers are arranged in different stacking directions. Refrigerator described.