JPH08247620A - Refrigerator - Google Patents

Abstract

PURPOSE: To secure high heat exchange characteristic of a condenser provided in a machine chamber of a refrigerator body and high heat dissipation property of a compressor. CONSTITUTION: A refrigerator includes in a rear and lower part of a refrigerator body a machine chamber 2 including a condenser 5, a compressor 6, an impeller 7 of a crossflow fan, an outer box 3 for partitioning the refrigerator body and the machine chamber 2, and a bottoms plate on which the condenser 5 and the compressor 6 are provided parallely. In the refrigerator, the outer box 3 is configured into a smooth curved surface bulged to the side of the refrigerator body and the side of an air intake in a bottom plate is brought into close contact with the impeller 7 and folded downward by 90 degree.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator provided with a condenser capable of efficient heat exchange.

[0002]

2. Description of the Related Art In recent years, refrigerators have adopted a structure in which devices such as a condenser and a compressor that constitute a refrigeration cycle are forcibly cooled by a blower with the increase in size. It is laid out in the machine room formed in. The refrigerator disclosed in Japanese Patent Laid-Open No. 26563/1993 will be described below as an example of a conventional refrigerator.

4 and 5 are a machine room perspective view and a machine room sectional view of the above-mentioned conventional refrigerator, respectively.

In FIGS. 4 and 5, 1 is a refrigerator main body,
2 is a machine room defined in the lower rear part of the refrigerator body 1, 5 is a condenser, 6 is a compressor, 7a is a fan, 9 is an air outlet 1.
4 is a machine room rear cover, 12 is an air intake provided on the front wall surface 31 of the machine room, 10 is an air guide passage for guiding cooling air introduced from the lower front part of the refrigerator toward the air intake 12, 31b Is a cooling air guide surface, and 32 is an evaporation dish.

The operation of the refrigerator constructed as described above will be described below. First, the cooling air attracted by the fan 7a goes from the lower front part of the refrigerator to the air intake 12 through the air guide passage 10. At this time, the cooling air guide surface 31b ensures a substantially uniform flow of the cooling air over the entire surface of the condenser 5 provided at the air intake 12, and heat is efficiently exchanged. The cooling air that has passed through the condenser 5 is a fan 7a,
The air passes through the compressor 6 in this order and is discharged from the air discharge port 14 to the outside of the machine room 2.

[0006]

However, in the conventional structure, since the cooling air taken in from the front of the refrigerator largely changes the main flow direction when being taken into the machine room, the airflow resistance is large and it is difficult to secure the air volume, and the condenser It is difficult to improve heat exchange performance.

Further, the heat exchange by the condenser causes the temperature of cooling air for cooling the compressor to rise, and the heat dissipation of the compressor is deteriorated.

The present invention solves the conventional problems.
It is intended to provide a refrigerator capable of enhancing the heat exchange performance of a condenser and ensuring the heat radiation performance of a compressor without enlarging the machine room.

[0009]

In order to achieve this object, a refrigerator according to a first aspect of the present invention comprises a machine room provided with a condenser, a compressor, and an impeller of a cross flow fan in a lower rear portion of a refrigerator body. An outer box part for partitioning the refrigerator main body and the machine room, an air intake provided between the lower part of the outer box part and the bottom plate of the machine room, a machine room back cover provided with an air outlet, and a refrigerator main body An air guide path that guides cooling air from the lower front portion to the air intake port, the impeller is arranged at the air intake port, and the condenser facing the front of the refrigerator is provided in parallel with the compressor. The cooling air induced by the rotation of the impeller is taken into the machine room from the air intake through the air guide passage, passes through the condenser and the compressor, and is discharged to the outside of the machine room from the air exhaust. In the refrigerator as described above, the outer box portion is the main body of the refrigerator. In addition to a smooth curved surface bulging, it has a structure in which the air inlet side of the bottom plate bent in proximity to 90 degrees below the impeller.

In addition to the structure of the refrigerator of the first invention, the refrigerator of the second invention has a structure in which a cooling air guide plate is provided between the impeller and the condenser and the compressor. There is.

[0011]

With the structure of the first invention, the cooling air drawn into the machine room can be smoothly taken in without changing the main flow direction, so that the air passage resistance can be suppressed and the fan is classified as a high static pressure type. Cooling required to secure the heat exchange performance of the condenser and the heat radiation performance of the compressor even in a machine room with a large air duct resistance, which originally contains many obstacles by forming a cross-flow fan. The air volume can be easily obtained.

Moreover, in the conventional method, the heat radiation performance of the compressor is deteriorated because the compressor is cooled by the cooling air whose temperature rises when passing through the condenser, whereas in the present invention, the condenser and the compressor are arranged in parallel. Cools the condenser and the compressor with the temperature of the cooling air taken in from the front lower part of the refrigerator, and the cooling air whose temperature has risen is exhausted from the air exhaust port provided on the back cover of the machine room. The heat dissipation performance of the compressor can be improved.

Further, the outer box portion of the refrigerator main body forming the front and upper walls of the machine room is formed with a smooth curved surface bulging toward the refrigerator body side, and the air intake port of the bottom plate of the machine room in which the condenser and the compressor are arranged in parallel. By folding the side close to the impeller and bending it 90 degrees downward, the outer box part of the refrigerator body can function as a casing, and the front corner part of the bottom plate of the machine room can function as a stabilizer. With an impeller, a cross-flow fan that uses the functional parts of an existing refrigerator can be configured, and a rational and compact forced convection refrigeration unit unique to a refrigerator that reduces the number of parts that make up the blower unit can be configured. .

Further, since the cooling air sent from the cross flow fan flows in layers along the outer casing and is discharged from the back cover of the machine room, the cooling air in the vicinity of the outer casing acts as a heat insulating layer, and the condenser. Also, it is possible to reduce the thermal influence on the refrigerator bottom chamber due to the heat radiation of the compressor.

Further, according to the configuration of the second invention, a part of the cooling air sent from the fan can be diverted by the cooling air guide plate to uniformly send the cooling air to the condenser and the compressor.
The heat exchange performance of the condenser and the heat dissipation performance of the compressor can be improved without waste.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the first invention will be described below with reference to the drawings. 1 is a plan view of the refrigerator machine room, and FIG. 2 is a sectional view taken along the line AA of FIG. 1 and 2, 1 is a refrigerator main body, 2 is a machine room, 3 is a refrigerator main body 1 and the machine room 2, and a smooth curved surface swelled on the refrigerator main body side to play a casing of a cross flow fan. The outer boxes 4 and 4 are the condenser 5, the compressor 6, the impeller 7 and the impeller 7 of the cross flow fan.
A machine room bottom plate in which a motor 8 for driving the motor is mounted and a portion close to the impeller 7 is bent downward by 90 degrees so as to act as a stabilizer of the cross flow fan, and an end portion is brought close to the floor surface 11, and 9 is a machine. It is a room back cover, and the machine room 2 is constructed by abutting the outer box part 3, the bottom plate 4, and the back cover 9.

Reference numeral 10 denotes an air guide passage formed in a gap between the refrigerator main body 1 and the floor surface 11 to guide cooling air from the lower front portion of the refrigerator to the machine room 2. Reference numeral 12 denotes an impeller 7 formed by an outer box portion 3 and a bottom plate 4. Is a slit cover provided at the air inlet 12 for preventing intrusion of a mouse, and 14 is an air outlet provided at the back cover 9. Further, 15 is an inner box of the refrigerator main body 1, 16 is a heat insulating material, and 17 is a door.

Solid arrows in the figure indicate the direction of convection of the cooling air, and dotted arrows indicate the direction of rotation of the impeller 7.

Regarding the refrigerator constructed as described above,
The operation will be described below. First, the impeller 7 driven by the motor 8 rotates in the direction of the dotted line arrow, and the cross box fan is formed by the outer box part 3 which functions as a casing and the bottom plate 4 which functions as a stabilizer. The cooling air is drawn toward the machine room 2 through the air guide path.

At this time, the functional parts of the refrigerator can also serve as the casing and stabilizer of the cross flow fan, and a rational blower unit peculiar to the refrigerator can be constructed. The cooling air that has reached the air intake 12 has an impeller 7
Rotation of the bottom plate 4 creates a vortex-like flow across the impeller so that it winds up in the machine room 2 around the stabilizer formed at the corner of the air intake side of the bottom plate 4, and along the casing formed by the outer box part 3, the machine room 2 Sent in.

Here, it is considered realistic to arrange a low static pressure type fan sideways in the refrigerator in the configuration of the conventional example. In that case, a low static pressure type fan is installed in the machine room 2 having a large air passage resistance. In addition to attracting the cooling air by changing the main flow direction of the cooling air to the lateral direction of the refrigerator, the amount of the cooling air attracted to the machine room 2 is halved compared to the fan unit test of the same rotation speed.

On the other hand, in the structure of the present invention, the cooling air sent to the machine room 2 is sent to the machine room 2 without changing the main flow direction, so that the air passage resistance can be reduced and the cross flow fan is a multi-blade fan. Since it is strong against a high static pressure, it is possible to minimize a decrease in the amount of cooling air flowing into the machine room 2.

The cooling air that has flowed into the machine room 2 cools the condenser 5 and the compressor 6 arranged in parallel on the bottom plate 4 in parallel, so that the cooling air is not affected by their mutual heat radiation. High heat exchange performance is obtained, and high heat dissipation performance is obtained also in the compressor 6.

Further, since the cooling air sent from the cross-flow fan forms a laminar flow along the outer case part 3, the cooling air in the vicinity of the outer case part 3 acts as a heat insulating layer, and the condenser 5 and It is possible to reduce the thermal influence on the refrigerator bottom chamber due to the heat radiation of the compressor 6. After that, the cooling air heated by the condenser 5 and the compressor 6 is discharged to the outside of the machine room 2 from the air exhaust port 14 provided in the back cover 9.

Further, since the end of the bottom plate 4 on the side of the air intake 12 is brought close to the floor surface 11, the cooling air discharged to the outside of the machine room 2 reaches the air intake 12 again and enters the inside of the machine room 2. It is possible to prevent the short circuit phenomenon that is introduced.

As described above, according to this embodiment, the outer box portion 3
By forming a blower unit by the casing by the casing, the stabilizer by the bottom plate 4 and the impeller 7 of the cross flow fan, and arranging the condenser 5 and the compressor 6 on the bottom plate 4 in parallel, a high heat exchange performance of the condenser 5 is secured. At the same time, the high heat radiation performance of the compressor 6 can be achieved at the same time, while the thermal influence on the refrigerator bottom chamber due to the heat radiation of the condenser 5 and the compressor 6 can be reduced.

Further, the outer box part 3 and the bottom plate 4 also serve as the components of the blower unit, whereby a rational and compact forced convection type refrigeration unit peculiar to the refrigerator can be constructed. Furthermore, the end portion of the bottom plate 4 on the air intake 12 side is fixed to the floor surface 12
The short circuit phenomenon can be prevented by bringing the short circuit phenomenon closer.

Next, an embodiment of the refrigerator of the second invention will be described with reference to the drawings focusing on the points different from the embodiment of the first invention. FIG. 3 is a cross-sectional view of a refrigerator machine room in one embodiment of the second invention, which is taken along the line AA in FIG.

In FIG. 3, reference numeral 18 denotes a cooling air guide plate provided between the impeller 7 of the cross flow fan and the condenser 5 and the compressor 6. The operation of the refrigerator configured as described above will be described. The cooling air introduced from the air intake 12 into the machine room 2 by the crossflow fan constituted by the casing formed by the impeller 7 and the outer casing 3 and the stabilizer formed by the bottom plate 4 is generally guided along the casing formed by the outer casing 3. It flows in the chamber 2. At this time, a part of the cooling air is turned to the lower side of the condenser 5 and the compressor 6 by the cooling air guide plate 18, whereby the cooling air is uniformly sent to the condenser 5 and the compressor 6, and the cooling air of the condenser 5 is discharged. The heat exchange performance and the heat radiation performance of the compressor 6 can be improved without waste.

As described above, according to this embodiment, the impeller 7
By providing the cooling air guide plate 18 between the condenser 5 and the compressor 6, the heat exchange performance of the condenser 5 and the heat dissipation performance of the compressor 6 can be improved without waste.

Although only one cooling air guide plate is provided in this embodiment, a plurality of cooling air guide plates can be provided to further uniformize the cooling air.

[0032]

As described above, according to the first aspect of the present invention, the refrigerator main body and the machine room are divided into a machine room provided with a condenser, a compressor, and an impeller of a cross-flow fan in the lower rear part of the refrigerator body. An outer box part, an air intake port provided between the lower part of the outer box part and the bottom plate of the machine room, a machine room back cover provided with an air discharge port, and a front lower part of the refrigerator body to the air intake port. An air guide passage for guiding cooling air is provided, the impeller is arranged at the air intake, the condenser facing the front of the refrigerator is provided in parallel with the compressor, and is attracted by the rotation of the impeller. In the refrigerator, the cooling air is taken into the machine room from the air inlet through the air guide passage, passes through the condenser and the compressor, and is discharged to the outside of the machine room from the air outlet. Smooth curved surface with the part bulging toward the refrigerator body In addition, since the air intake side of the bottom plate is brought close to the impeller and bent downward by 90 degrees, the cooling air drawn into the machine room can be smoothly taken in without substantially changing the main flow direction. The resistance can be suppressed and the amount of cooling air required to secure the cooling performance of the condenser and the heat radiation performance of the compressor can be easily obtained.

Moreover, since the condenser and the compressor are provided side by side, the condenser and the compressor are cooled by the temperature of the cooling air taken in from the front lower part of the refrigerator, and the cooling air whose temperature has risen is the air provided on the back cover of the machine room. Since it is discharged from the discharge port, the heat exchange performance of the condenser and the heat radiation performance of the compressor can be improved.

Further, the outer box part of the refrigerator main body forming the front and upper walls of the machine room is formed with a smooth curved surface bulging toward the refrigerator main body side, and the air intake side of the bottom plate of the machine room in which the condenser and the compressor are installed. By bending 90 degrees downward, the outer box part of the refrigerator body can function as a casing and the front corner part of the bottom plate of the machine room can act as a stabilizer, and the impeller installed at the air intake port can be applied to the existing refrigerator. It is possible to configure a cross-flow fan that uses the functional components described in 1., reduce the number of components that configure the blower unit, and configure a rational and compact forced convection type refrigeration unit unique to a refrigerator.

Further, since the cooling air sent from the cross flow fan flows in layers along the outer casing part and is discharged from the back cover of the machine room, the cooling air in the vicinity of the outer casing part acts as a heat insulating layer and the condenser. Also, it is possible to reduce the thermal influence on the refrigerator bottom chamber due to the heat radiation of the compressor.

In the second aspect of the invention, since the air guide plate is provided between the impeller and the condenser and the compressor, a part of the cooling air sent from the fan is deflected by the cooling air guide plate and condensed. Cooling air can be blown evenly to the container and compressor,
The heat exchange performance of the condenser and the heat dissipation performance of the compressor can be improved without waste.

[Brief description of drawings]

FIG. 1 is a plan view of a machine room of a refrigerator according to an embodiment of the first invention.

FIG. 2 is a sectional view of a machine room of a refrigerator according to an embodiment of the first invention.

FIG. 3 is a sectional view of a refrigerator in a machine room according to an embodiment of the second invention.

FIG. 4 is a perspective view of a machine room of a refrigerator showing a conventional example.

FIG. 5 is a machine room sectional view of a refrigerator showing a conventional example.

[Explanation of symbols]

 3 Outer Box Part 4 Bottom Plate 5 Condenser 6 Compressor 7 Impeller 9 Rear Cover 10 Air Guide 12 Air Intake 14 Air Outlet 18 Cooling Wind Guide Plate

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yasuki Hamano 4-2-5 Takaida Hondori, Higashi-Osaka City, Osaka Prefecture Matsushita Refrigerator Co., Ltd. (72) Inventor Shinichi Kanaoka 4-chome Takaidamoto-dori, Higashi Osaka No. 2-5 Matsushita Refrigerator Co., Ltd. (72) Inventor Kubota ▲ Takayoshi Yoshida 4-2-5 Takaidahondori, Higashi-Osaka City, Osaka Prefecture Matsushita Refrigerator Co., Ltd.

Claims (2)

[Claims] 1. A machine room provided with a condenser, a compressor, and an impeller of a crossflow fan behind a lower part of a refrigerator body, an outer box part for partitioning the refrigerator body and the machine room, and a lower part of the outer box part. An air intake provided between the bottom plate of the machine room, a machine room back cover provided with an air outlet, and an air guide passage for guiding cooling air from the lower front portion of the refrigerator body to the air intake. , The impeller is arranged at the air inlet, the condenser facing the front of the refrigerator is juxtaposed with the compressor, and cooling air induced by rotation of the impeller passes through the air guide passage. In a refrigerator in which the air is taken into the machine room from the air inlet, passes through the condenser and the compressor, and is discharged to the outside of the machine room from the air outlet, the outer box portion is swelled toward the refrigerator body to form a smooth curved surface. The shape of the bottom plate and the air intake Set the inlet side close to the impeller 90
A refrigerator characterized by being bent downwards. 2. The refrigerator according to claim 1, wherein a cooling air guide plate is provided between the impeller and the condenser and the compressor.