JP2017203406A - Hermetic type compressor and refrigerator including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a compressor to be easily cooled.SOLUTION: A compressor has a closed vessel 15. The closed vessel has a bottom part, a ceiling wall positioned above the bottom part, and a standing wall connecting the bottom part with the ceiling wall. A recess 32 formed by the ceiling wall and the standing wall has vibration absorbing rubber 34.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a hermetic compressor and a refrigerator including the same.

The refrigeration cycle of the refrigerator includes a compressor and a condenser, and since the temperature is high, heat dissipation is required. Since the size of the storage chamber for storing the compressor largely depends on the shape (size) of the compressor, it is required to reduce the size of the storage chamber in order to increase the internal volume of the refrigerator.
In Patent Document 1, the bottom of the compressor is very close to the floor (base).

Japanese Patent Laying-Open No. 2015-105577

  Reducing the size of the compressor itself can reduce the size of the storage room, but various improvements are also required for downsizing itself, and simply reducing the size will reduce the heat dissipation capacity of the compressor. It is hoped that this will be done effectively. For example, it is conceivable to form a passage through which air sent toward the compressor is efficiently flowed by a blower provided in the storage chamber.

  This invention made | formed in view of the said situation is a compressor which has an airtight container, Comprising: The said airtight container is a standup which connects the bottom part, the ceiling wall located above this bottom part, and the said bottom part and the said ceiling wall. And a vibration-proof rubber is provided in a recess formed by the ceiling wall and the rising wall.

  According to the present invention, the compressor can be easily cooled.

Rear view of main parts of refrigerator AA sectional view of FIG. Compressor top view of FIG. Compressor longitudinal section of FIG. Enlarged view of the main part explaining another molding state of the recess

Embodiments of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to this embodiment, Various modifications are included.
First, the overall configuration of the present embodiment will be described with reference to FIGS.
The refrigerator main body 1 includes a vegetable compartment 2 in addition to a freezer compartment and a refrigerator compartment (not shown). A compressor 4, a blower 5, and a condenser 6 are installed in a storage chamber 3 formed at the lower back of the refrigerator body 1. The compressor 4 and the condenser 6 constitute a part of the refrigeration cycle, and both of them are high in temperature and need cooling to ensure performance. The blower 5 cools the condenser 6 with the sucked external air, and cools the compressor 4 with the discharged air.

Air is introduced into the storage chamber 3 through a storage chamber cover 7 that covers the storage chamber 3, a suction hole 9 provided in the base 8 that forms the lower surface of the storage chamber 3, and an intake port 10 provided in the storage chamber cover 7. Air is discharged from the outlet 11. The ceiling plate 13 is a plate that forms the upper part of the storage chamber 3.
The cool air passage 14 is formed on the outer periphery of the compressor 4 and includes an upper cool air passage 14a and a lower cool air passage 14b.

  The upper cool air passage 14 a is a passage formed between the ceiling plate 13 and the upper surface of the compressor 4, and the lower cool air passage 14 b is a passage formed between the base 8 and the compressor 4. Usually, the air that has passed through the condenser blown out from the blower 5 collides with the compressor 4, and is divided into the upper and lower cold air passages 14 a and 14 b.

Next, the structure for attaching the compressor 4 and the compressor 4 to the base 8 and the structure of the cool air passage 14 will be described with reference to FIGS. In the sealed container 15, a compression element 16, an electric element 17, a crankshaft 18, a frame 19 and a lubricating oil 20 are accommodated as main components.
The compression element 16 includes a cylinder 21, a piston 22, a connecting rod 28, a crankshaft 18 having an eccentric shaft portion 18 a, and the like, and also includes a coupling mechanism that converts the eccentric rotational motion of the crankshaft 18 into the reciprocating motion of the piston 22. .
The electric element 17 includes a stator 24 composed of an armature core and windings, and a rotor 25 that is rotatably disposed in the stator 24. The compression element 16 and the electric element 17 are arranged substantially vertically. The electric element 17 drives the compression element 16 via the crankshaft 18. The stator 24 is supported on the bottom of the sealed container 15 via a coil spring 26.

  The crankshaft 18 is fixed to the rotor 25 and extends vertically, a main shaft portion 18b, a flange provided at the upper end of the main shaft portion 18b, an upper portion extending from the flange and being offset with respect to the axis of the main shaft portion 18b. An eccentric shaft portion 18a provided in the center and an oil pump 27 attached to the lower end portion of the main shaft portion 18b are provided. A spiral groove 18c communicating with an oil supply hole in the crankshaft 18 is formed on the outer peripheral surface of the main shaft portion 18b.

The basic operation of the compressor configured as described above will be described below.
By the eccentric rotational movement of the eccentric shaft portion 18a, the piston 22 reciprocates on the inner diameter of the cylinder 21 serving as a compressor, and the refrigerant gas is compressed. The compressed refrigerant is discharged to a condenser 6 outside the compressor 4. The eccentric motion of the eccentric shaft portion 18a of the crankshaft 18 is converted into the reciprocating motion of the piston 22 by the connecting rod 28, and the piston 22 is reciprocated in the cylinder, whereby the refrigerant gas is compressed in the cylinder. As the crankshaft 18 rotates, the lubricating oil 20 stored in the sealed container 15 is pumped up by the rotation operation of the oil pump 27. The pumped lubricating oil 20 passes through a communication hole in the crankshaft 18 and is guided to the bearing portion. The lubricating oil that has lubricated the bearing portion through the spiral groove 18c is guided from the main bearing portion of the crankshaft 18 to the eccentric shaft portion 18a. Lubricating oil 20 supplied to the eccentric shaft portion 18a passes through the supply hole, fills the bearing gap between the ring portion of the connecting rod 28 and passes through the supply hole provided in the connecting rod 28, Lubrication between the piston 22 and the connecting rod 28 is performed. Further, since one end of the eccentric shaft portion 18a of the crankshaft 18 is open, the lubricating oil 20 leaks from the tip of the eccentric shaft portion 18a, and is scattered by centrifugal force as the crankshaft 18 rotates, and is outside the piston. It falls on the diameter part and lubricates between the piston 22 and the cylinder 21.

  Next, the structure including the shape of the compressor 4 will be described. As shown in FIGS. 3 and 4, the compressor 4 has a substantially oval shape (a thin oval shape having a height direction of about 100 mm compared to a height direction of about 100 mm). Is welded at almost the center.

The bottom portion of the compressor 4 is located above the lower end of the vibration isolating rubber 34, that is, a flat plane portion 31 in which a gap is formed between the base 8 and a recess 32 located in the vicinity of the outer periphery of the compressor 4. Have The recess 32 has a size that can substantially accommodate an attachment leg 33 and an anti-vibration rubber 34 for attaching the compressor 4 to the base 8.
The mounting legs 33 are provided in the recesses 32 at the four corners of the bottom of the compressor 4. When the compressor 4 is attached to the base 8, the bottom portion of the compressor 4 is at a height position at which the cool air passage 14 b can be formed between the flat portion 31 and the base 8.
Here, the plane portion 31 refers to a bottom surface shape in which the intersections of the recesses 32 at the four corners of the bottom portion and the bottom portion are respectively connected by straight lines, and the farthest position between the straight line and the bottom surface is within 10 mm.
The upper surface of the compressor 4 includes an inclined surface 29 that is inclined toward the lower container 15 b and a flat surface portion 30 that is connected to the inclined surface 29.

On the upper surface of the compressor 4, an inclined surface 29, an upper surface flat portion 30, and a recess are provided. The inclined surface 29 is inclined downward as it approaches the blower 5, and the recess is provided at a position facing the blower 5. The inclined surface 29 enlarges the cross-sectional area of the upper cooling air passage 14a formed between the ceiling board 13 and the compressor 4. Since the entrance of the passage 14 a is widened, the air from the blower 5 can be drawn in and further flow along the inclined surface 29.
The dimension in the width direction of the mounting leg 33 is made slightly larger than the outer dimension of the compressor 4. As a result, it is possible to facilitate the assembly and removal of the anti-vibration rubber 34 attached to the attachment leg 33.

The anti-vibration rubber 34 is attached on the base 8, and the compressor 4 is fixed to the base 8 via the anti-vibration rubber 34 attached to the attachment legs 33.
The recess 32 is provided at the four corners of the sealed container 15 and includes a rising wall 32b and a ceiling wall 32c of the sealed container. Two of the indentations 32 face the blower 5 side. The mounting legs 33 are horizontally mounted on the base 8 from the rising wall 32b. The upper end of the anti-vibration rubber 34 is close to the ceiling wall 32c, and there is a gap between it and the ceiling wall 32c.

  The attachment spring 26 is a member that elastically supports the electric compressor unit in which the compression element 16 and the electric element 17 are combined in the sealed container 15. For this reason, the attachment spring 26 is attached to the upper surface of the ceiling wall 32 c of the recess 32.

The anti-vibration rubber 34 and the attachment spring 26 are disposed up and down via the ceiling wall 32c. That is, both the center line and the attachment point to the sealed container 15 are very close. For this reason, vibration and noise from the electric compressor section are transmitted and transmitted to the anti-vibration rubber 34 through the highly rigid recess 32 and the mounting leg 33, so that the vibration noise is reduced.
The flat surface portion 31 is for securing the cool air passage 14b. Since the shape of the bottom is flat, the gap between the base 8 and the base 8 can be made uniform, and the cross-sectional area of the cool air passage can always be stable. The flat surface portion 31 does not need to cover the entire bottom portion, and a part of the flat surface portion 31 may protrude upward from the flat surface portion 31. If it carries out like this, the further cold air | gas channel | path 14b will flow easily.
Further, the opening of the cross-sectional area of the lower cool air passage 14b can be greatly enlarged by the recess 32 provided at the inlet of the lower cool air passage 14b.

The operation of the refrigerator having the above configuration is as follows.
That is, when the refrigerator is operated, the refrigeration cycle including the compressor 4 is operated, and on the refrigerator main body side, for example, the freezer compartment and the refrigerator compartment are cooled to a predetermined temperature. Along with this, the compressor 4 in the storage chamber 3 at the lower back of the refrigerator is also operated.
The heat of the compressor 4 and the condenser 6 is radiated to the outside of the storage chamber 3 by the blower 5 that is operated simultaneously, but is cooled as follows in the compressor section.

  The compressor 4 installed in the storage room 3 is short and has an oval shape, and the storage room 3 is narrow and has a small gap between the ceiling plate 13 and the base 8 to increase the internal volume of the refrigerator. Only passages with dimensions are made. At this time, the upper cool air passage 14 a is formed between the upper surface of the compressor 4 and the ceiling plate 13, and the lower cool air is formed between the lower surface of the compressor 4 and the base 8. This is a passage 14b.

  The cool air blown out from the blower 5 toward the compressor 4 is blown toward the entire circumference of the compressor 4. At this time, the upper cool air passage 14 a formed between the compressor 4 and the ceiling plate 13 has An inclined surface 29 provided on the upper surface of the compressor 4 receives and guides the cold air. The introduced cool air sufficiently exchanges heat with the compressor 4 and is blown out of the storage chamber 3 through the outlet 11 provided in the storage chamber cover 7.

  On the other hand, the cool air entering the lower cool air passage 14 b formed between the compressor 4 and the base 8 is guided to the opening formed by the recess 32 and reaches the flat portion 31. Here, sufficient heat exchange with the compressor 4 is performed.

  By efficiently cooling the compressor, the dimension between the ceiling plate 13 and the base 8 constituting the storage chamber 3 can be reduced. By combining this with downsizing of the compressor itself (an oblong shape with a short height), the storage chamber 3 can be made smaller, and the internal volume of the vegetable chamber 2, for example, can be increased accordingly.

Next, the structure for reducing refrigerator noise will be described.
Usually, the vibration noise generated with the operation of the compressor is processed in the compressor 4, and the electric compressor portion, which is an oscillation source, is elastically supported in the hermetic container 15 via the attachment spring 26. For this reason, most of the vibration and noise generated by the electric compressor section are absorbed by the mounting spring 26, but the vibration noise that has passed through the mounting spring 26 enters the recess 23 in which the mounting spring 26 is installed. This part is different from the other parts in particular, and it is required not to transmit vibration to the mounting leg 33 and the vibration isolating rubber 34 located in the immediate vicinity as well as not to increase vibration noise and resonance. The vibration reaching the recess 23 is attenuated by the vibration isolating rubber 34 through the mounting leg 33 and transmitted to the base 8 side of the refrigerator main body.

  The vibration noise transmitted to the refrigerator main body side through the above-described path is conventionally provided by the attachment springs 33 and the anti-vibration rubber 34 being attached up and down, and the attachment legs 33 being provided using the strong rigidity created by the recesses. As compared with the above, it is greatly reduced.

Since the present invention has the configuration as described above, the following effects can be obtained.
That is, a compressor in which the electric compressor part is supported in the sealed container from the lower container side by a vibration isolating spring is installed on the base of the refrigerator box via vibration isolating rubber, and further, stored on the upper and lower surfaces of the compressor. In a refrigerator in which a cool air passage is configured between the ceiling surface of the room and the base, and the cool air is blown into the cool air passage by a blower, the bottom portion of the compressor is formed in a flat shape, and a recess is formed in the corner portion. A vibration isolation rubber provided between the mounting legs for fixing the compressor and the vibration isolation rubber interposed between the bases and elastically supporting the electric compressor portion on the ceiling wall forming the depression. It is a refrigerator provided with a spring and having an inlet opening of a cold air passage in which the recess is formed in the lower surface of the compressor.

  Accordingly, since the vibration-proof rubber is installed in the recess, it is not necessary to increase the outer diameter of the compressor. Therefore, the storage efficiency of the compressor storage chamber is improved. Moreover, since the opening of the cold air path created between the base and the compressor bottom surface is enlarged by the depression, the cold air from the blower is sufficiently fed. As a result, sufficient cool air is supplied to the upper and lower cool air passages, so that the cool air passage can be lowered and the height of the storage chamber can be reduced. Furthermore, the amount of lubricating oil collected can be reduced by flattening the place where the lubricating oil is stored and by forming the recesses at the four corners of the bottom.

Further, the upper surface of the compressor is composed of an inclined surface inclined to the lower container side and an upper surface flat portion, and a cool air passage is formed between the inclined surface and the upper surface flat portion between the storage room ceiling surface and the compressor. This is a refrigerator in which a recess and a flat portion are formed on the lower surface, a cold air passage is formed between the flat portion and the base, and the inclined surface and the recess are opposed to the blower.
Thereby, the compressor can be cooled even if the height dimension of the cool air passage is reduced. Thereby, the height dimension of the storage chamber can be reduced.

  This is a refrigerator in which an anti-vibration spring that elastically supports the electric compressor unit in a sealed container and an anti-vibration rubber that elastically supports the compressor on the base are set up and down on the ceiling wall of the recess.

  Thereby, the attachment fulcrum of the vibration isolating spring and the vibration isolating rubber is brought close to each other, and the number of vibration waveforms generated by the closed container resonating can be reduced, and the vibration noise generated by the compressor as a whole can be reduced.

DESCRIPTION OF SYMBOLS 1 Refrigerator body 2 Vegetable room 3 Storage room 4 Compressor 5 Blower 6 Condenser 7 Storage room cover 8 Base 9 Suction hole 10 Inlet 11 Outlet 12 Caster 13 Ceiling board 14 Cold air passage 14a Upper cold air passage 14b Lower cold air passage 15 Sealing Container 15a Upper container 15b Lower container 16 Compression element 17 Electric element 18 Crankshaft 18a Eccentric shaft part 18b Main shaft part 18c Spiral groove 19 Frame 20 Lubricating oil 21 Shilling 22 Piston 23 Electric compressor part 24 Stator 25 Rotor 26 Mounting spring 27 Oil pump 28 Connecting rod 29 Inclined surface 30 Upper surface plane portion 31 Plane portion 32 Recess 32a Second recess 32b Rising wall 32c Ceiling wall 33 Mounting leg
34 Anti-vibration rubber
35 Recess

Claims (3)

A compressor having a sealed container,
The closed container has a bottom, a ceiling wall located above the bottom, and a rising wall that connects the bottom and the ceiling wall,
A compressor having an anti-vibration rubber in a recess formed by the ceiling wall and the rising wall. A refrigerator comprising the compressor according to claim 1,
The compressor has an upper surface inclined surface that is inclined downward toward the outer peripheral side,
A refrigerator having a blower for sending air toward the recess and the upper inclined surface. The anti-vibration rubber has a gap between the ceiling wall and / or the rising wall,
An attachment spring provided on the upper side of the ceiling wall and supporting a compression element inside the sealed container;
The bottom portion of the closed container is located above the lower end of the anti-vibration rubber, and has a flat portion having a flat shape and a portion protruding upward from the flat portion. The compressor according to 1.

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