JP2001304118A - Hermetic compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce heating of a refrigerant in a muffler and to increase efficiency, regarding a hermetic compressor used in a refrigerator for domestic use. SOLUTION: This hermetic compressor comprises a motor part 3; an enclosed container 1 containing a machine part 2, such as a cylinder 4, etc.; a valve plate 6; a muffler 19; and a suction tube 9. The muffler 19 is provided with inlet and outlet flow passages 20 and 21. The inlet flow passage 20 is provided at one end with an inlet flow passage opening 23 opened to the internal part of the enclosed container 1 and at the other end with an inlet flow passage opening 23 opened to the internal part of the muffler 19. The outlet flow passage 21 is provided at one end with an outlet flow passage opening 24 opened to the internal part of the muffler 19 and at the other end with a suction part 25 communicating with the suction hole of the valve plate 6. Since at least a part of the outlet flow passage 21 makes contact with the inlet flow passage 20, refrigerant gas is suppressed in the increase of its temperature during the passage of it through the outlet flow passage 21, which is related to improvement of volumetric efficiency and compressor efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic compressor in a refrigerator for home refrigerators, showcases, and the like, and more particularly to an improvement in a refrigerant suction capacity of a muffler, efficiency, and noise reduction. .

[0002]

2. Description of the Related Art In recent years, various improvements have been made to hermetic compressors from the viewpoint of high efficiency and low noise.

A conventional hermetic compressor is disclosed in US Pat. No. 5,971,720.

A conventional hermetic compressor disclosed in the above-mentioned US Pat. No. 5,971,720 will be described below with reference to FIGS. 13, 14 and 15.

FIG. 13 is a schematic longitudinal sectional view of a conventional hermetic compressor, FIG. 14 is a main part cross-sectional view of a cylinder head and a muffler of the hermetic compressor, and FIG. 15 is a schematic perspective view of muffler parts before assembly. It is.

13, 14 and 15, reference numeral 1 denotes a closed container, 2 denotes a mechanical part elastically supported in the closed container 1,
Denotes a motor unit disposed in the mechanical unit 2.

Reference numeral 4 denotes a cylinder, and a cylinder block 5
Has an open end closed by a valve plate 6 fixed to the opening and provided with a suction and discharge space. Reference numeral 7 denotes a cylinder head which is located on the valve plate 6 and is fixed to the cylinder block 5, and has a suction chamber 8 therein.

Reference numeral 9 denotes a suction pipe installed in the closed vessel 1, one end of which is open toward the inside of the closed vessel 1, and the other end of which is an evaporator of a cooling system (not shown) equipped with a compressor. Connected to the side.

Reference numeral 10 denotes a muffler attached to the outside of the cylinder head 7. Reference numeral 11 denotes an inner end 13 inside the muffler body 12 and outside the muffler body 12, which are inside the sealed container 1 of the compressor. Is a gas inlet portion having an outer end 14 in fluid communication with the suction pipe 9 provided at the inner end of the muffler body 12 and an outer end 16 outside the muffler body 12 and connected to the cylinder head 7. A gas outlet portion having an outer end 17;
Reference numeral 18 denotes a gas duct which is located outside the muffler 10 in the gas inlet portion 11 and forms a space facing the suction pipe 9 in the sealed container 1.

The operation of the conventional hermetic compressor configured as described above will be described below.

The arrows in FIGS. 13 and 14 indicate the flow of the refrigerant. The refrigerant released from the cooling system (not shown) on the wall of the closed vessel 1 via the suction pipe 9 is sucked from the gas duct 18 of the muffler 10 and guided to the outer end 14 of the gas inlet portion 11 in FIGS. I will Thereafter, the gas passes through the gas inlet portion 11 and the muffler body 12
It is opened inside. Then, the refrigerant in the muffler body 12 is sucked from the inner end 16 of the gas outlet portion 15, passes through the gas outlet portion 15, and is opened from the outer end 17 to the suction chamber 8 in the cylinder head 7. After that, it is guided into the cylinder 4 through the suction hole of the valve plate 6.

When the refrigerant gas passes through the muffler 10, since a space is provided between the gas inlet portion 11 extending from the gas duct 18 and the muffler body 12, heat transfer from the high-temperature gas in the closed container 1 is performed. And increase the mass flow rate of the refrigerant gas finally sucked into the cylinder 4.

The pressure pulsation of the refrigerant generated when the refrigerant is sucked into the cylinder 4 propagates in a direction opposite to the flow of the refrigerant, and the volume in the muffler 10 and the flow in the gas inlet portion 11 and the gas outlet portion 15 are increased. Expansion and contraction are repeatedly attenuated by the path length.

[0014]

However, in the conventional structure described above, the distance between the inner end 13 of the gas inlet portion 11 and the inner end 16 of the gas outlet portion 15 in the muffler 10 is reduced. The refrigerant gas flowing from the inner end 13 of the portion 11 is once released into the muffler body 12, stays in the muffler body 12, and is sucked into the inner end 16 of the gas outlet portion 15. The time spent inside was long. As a result, the temperature of the refrigerant gas increased. Furthermore, gas outlet part 1
When the refrigerant gas passes through 5, the high-temperature gas in the muffler 10 further heats the refrigerant gas, which causes a problem that the mass flow rate and the efficiency are reduced.

An object of the present invention is to bring the gas inlet portion 11 and the gas outlet portion 15 into contact with each other so that the gas outlet portion 1
It is an object of the present invention to provide a hermetic compressor having high volumetric efficiency and high efficiency by suppressing a rise in the temperature of the refrigerant gas passing through the inside of the compressor.

Another object of the present invention is to provide a time period during which the refrigerant gas stays in the muffler 10, that is, a time period from when the refrigerant gas flows through the inner end 13 of the gas inlet portion 11 and is sucked into the inner end 16 of the gas outlet portion 15. It is an object of the present invention to provide a hermetic compressor having a high volumetric efficiency and a high efficiency by suppressing a rise in the temperature of the refrigerant gas by reducing the temperature of the refrigerant gas and further reducing the flow resistance of the refrigerant gas.

Another object of the present invention is to provide a hermetic compressor having a low noise level by reducing one or more specific frequencies while maintaining high volumetric efficiency and efficiency.

[0018]

The invention according to claim 1 of the present invention comprises a motor unit, a sealed container containing a mechanical unit such as a cylinder, a valve plate, a muffler, and a suction pipe, The muffler has an inlet flow path and an outlet flow path, and the inlet flow path has an inlet flow path suction port having one end opening in the closed container and an inlet flow path opening having the other end opening in the muffler. The outlet flow path has an outlet flow path opening having one end opened into the muffler, and a suction part having the other end communicating with a suction hole of the valve plate, and at least a part of the inlet flow path and the outlet flow path. Are in contact with each other, and the refrigerant gas guided from the cooling system into the high-temperature hermetic compressor passes through the inlet flow passage in the muffler before the outlet flow passage. The temperature is low relative to the road. Therefore, since the two flow paths are in contact with each other, heat conduction occurs from the outlet flow path to the inlet flow path, and the temperature of the outlet flow path itself decreases. Thereby, the temperature rise of the refrigerant gas guided to the outlet flow passage opening in the muffler is suppressed while passing through the outlet flow passage. Therefore, the specific volume of the refrigerant gas decreases, and the mass flow rate increases. Further, it has the effect of improving the efficiency as the volume efficiency is improved.

According to a second aspect of the present invention, in the first aspect of the present invention, the inlet gas passage opening and the outlet gas passage opening are close to and opposed to each other. Passes through the inlet flow path and is opened into the muffler from the inlet flow path opening, but because the inlet flow path opening and the outlet flow path opening portion are opposed to each other, the outlet flow path is formed in a short time. Be guided. Further, since a smooth flow of the refrigerant gas is formed in the muffler, a flow path loss is reduced and a rise in the temperature of the refrigerant is suppressed.

Further, the refrigerant gas guided from the cooling system into the high-temperature hermetic compressor passes through the inlet flow passage in the muffler before the outlet flow passage. The temperature is low relative to the road. Therefore, since the two flow paths are in contact with each other, heat conduction occurs from the outlet flow path to the inlet flow path, and the temperature of the outlet flow path itself decreases. Thereby, the temperature rise of the refrigerant gas guided to the outlet flow passage opening in the muffler is suppressed while passing through the outlet flow passage. Therefore, the specific volume of the refrigerant gas decreases, and the mass flow rate increases. Further, it has the effect of improving the efficiency as the volume efficiency is improved.

According to a third aspect of the present invention, in addition to the first or second aspect of the present invention, a partition plate for narrowing an opening space of the inlet channel and the outlet channel in the muffler is further provided. The intermittent pressure pulsation that occurs when the refrigerant gas is sucked into the cylinder causes the partition plate to be provided in the muffler so as to define a volume in the muffler when the refrigerant gas propagates in a direction opposite to a flow path of the refrigerant gas. Thereby, the specific frequency in the muffler can be significantly reduced, and further, the overall noise can be reduced.

The refrigerant gas flowing from the suction pipe passes through the inlet flow path and is released from the inlet flow path opening into the muffler. The inlet flow path opening and the outlet flow path opening face each other. In addition, since the opening space is narrowed, it is guided to the outlet flow path in a short time. By forming a smoother refrigerant gas flow, flow path loss is reduced,
In addition, a rise in the temperature of the refrigerant is suppressed.

Further, the refrigerant gas guided from the cooling system into the high-temperature hermetic compressor passes through the inlet flow passage in the muffler before the outlet flow passage. The temperature is low relative to the road. Therefore, since the two flow paths are in contact with each other, heat is transferred from the outlet flow path to the inlet flow path, and the temperature of the outlet flow path itself decreases. Thereby, the temperature rise of the refrigerant gas guided to the outlet flow passage opening in the muffler is suppressed while passing through the outlet flow passage. Therefore, the specific volume of the refrigerant gas decreases, and the mass flow rate increases. Further, there is an effect that the efficiency can be improved with the improvement of the volume efficiency.

According to a fourth aspect of the present invention, in addition to the first or second aspect of the present invention, a partition plate covering a part or the entire circumference of the outlet flow path and the inlet flow path is provided inside the muffler. The refrigerant gas flowing from the suction pipe passes through the inlet flow path and is released from the inlet flow path opening into the muffler. Since the outlet flow passage openings of the outlet flow passage are close to each other and the openings are opposed to each other, a smooth flow of the refrigerant gas is formed, thereby reducing flow passage loss. Further, the time during which the refrigerant gas stays in the muffler is shortened, and the surroundings of the inlet channel and the outlet channel have a double heat insulation structure, so that the temperature rise of the refrigerant is further suppressed.

Further, the refrigerant gas guided from the cooling system into the high-temperature hermetic compressor passes through the inlet flow passage in the muffler before the outlet flow passage. The temperature is low relative to the road. Therefore, since the two flow paths are in contact with each other, heat is transferred from the outlet flow path to the inlet flow path, and the temperature of the outlet flow path itself decreases. Thereby, the temperature rise of the refrigerant gas guided to the outlet flow passage opening in the muffler is suppressed while passing through the outlet flow passage. Therefore, the specific volume of the refrigerant gas decreases, and the mass flow rate increases. Further, there is an effect that the efficiency can be improved with the improvement of the volume efficiency.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a hermetic compressor according to the present invention will be described below with reference to the drawings. still,
The same reference numerals are given to the same components as those in the related art, and the detailed description is omitted.

(Embodiment 1) FIG. 1 shows Embodiment 1 of the present invention.
1 is a front view of a hermetic compressor according to the present invention. FIG. 2 is a cross-sectional view of a main part of the hermetic compressor of the embodiment, taken along line AA of FIG. FIG. 3 is a temperature characteristic diagram of the refrigerant gas in each part in the muffler of the embodiment.

In FIGS. 1, 2 and 3, reference numeral 19 denotes a muffler, and it is preferable to use a heat insulating material having a low heat transfer coefficient from the viewpoint of reducing the transfer of heat of the refrigerant. Further, the muffler 19 has an inlet channel 20 and an outlet channel 21, and the inlet channel 20 and the outlet channel 21 in the present embodiment.
Although the cross section of the flow path is a circular pipe, other shapes such as a square may be used. The inlet channel 20 has an inlet channel inlet 22 having one end opening in the closed container 1 and an inlet channel opening 23 having the other end opening in the muffler 19. The outlet channel 21 has one end in the muffler 19. An outlet passage opening 24 that opens into the suction port, and a suction portion 25 that has the other end communicating with a suction hole of the valve plate 6;
The inlet flow path 20 and the outlet flow path 21 are contacted and integrated in the muffler 19, and the inlet flow path opening 23 and the outlet flow path opening 24
Are in close proximity.

The operation of the hermetic compressor constructed as described above will be described below.

Conventionally, since the distance between the inlet flow path 20 and the outlet flow path 21 is long, the time for which the refrigerant opened in the muffler 19 stays in the muffler 19 is increased, and the temperature of the refrigerant gas rises remarkably. Therefore, the temperature of the outlet channel 21 itself is
The temperature was higher than the temperature of the inlet channel 20 itself. In this embodiment, since the inlet channel 20 and the outlet channel 21 have an integral structure,
Heat is generated from the outlet channel 21 to the inlet channel 20, and the temperature of the outlet channel 21 decreases.

As described above, the temperature change accompanying the flow of a series of refrigerant gas in the muffler 19 is shown in FIG.
The temperature of the low-temperature refrigerant gas flowing from the inlet flow passage inlet 22 slightly increases while passing through the inlet flow passage 20 as compared with the conventional case.

However, since the inlet passage opening 23 and the outlet passage opening 24 are close to each other, the time in which the refrigerant gas stays in the muffler 19 is shortened, and the temperature rise of the refrigerant gas is suppressed. .

Further, the outlet passage opening 24 of the outlet passage 21
During the passage through the outlet passage 21, the temperature rise of the refrigerant gas guided to the outlet is suppressed.

Accordingly, the mass flow rate is increased by reducing the specific volume of the refrigerant gas, so that the volume efficiency and the efficiency can be improved.

As described above, the hermetic-type compressor of the present embodiment comprises the hermetic container 1 containing the motor section 3, the mechanical section such as the cylinder 4, the valve plate 6, the muffler 19,
The muffler 19 has an inlet flow path 20 and an outlet flow path 21, and the inlet flow path 20 has an inlet flow path suction part 22 having one end opened in the sealed container 1 and the other end formed in the muffler 19. The outlet flow path 21 has an outlet flow path opening 24 having one end opening in the muffler 19 and a suction part 25 having the other end communicating with a suction hole of the valve plate 6. Since at least a part of the inlet channel 20 and the outlet channel 21 are in contact with each other, the temperature of the refrigerant gas guided to the outlet channel opening 24 of the outlet channel 21 is suppressed while passing through the outlet channel 21. You. Therefore, the specific volume of the refrigerant gas decreases, which leads to an improvement in volume efficiency and efficiency.

In this embodiment, the inlet channel 2
Although the configuration is such that the outlet 0 and the outlet flow path 21 are completely in contact in the muffler 19, a configuration in which a part thereof is in contact is also possible.

(Embodiment 2) FIG. 4 shows Embodiment 2 of the present invention.
1 is a front view of a hermetic compressor according to the present invention. FIG. 5 is a sectional view of a main part of the hermetic compressor of the embodiment, taken along line BB of FIG. FIG. 6 is a temperature characteristic diagram of the refrigerant gas in each part in the muffler of the embodiment.

4, 5, and 6, reference numeral 26 denotes a muffler, 27 denotes an inlet flow path having an inlet flow path opening 28 opened in the muffler 26, and 29 denotes an outlet flow path opening opened in the muffler 26. 30 is an outlet channel having 30.

In this embodiment, the inlet channel 27 and the outlet channel 29 are configured so that the inlet channel opening 28 and the outlet channel opening 30 according to the first embodiment are close to and opposed to each other.

The operation of the hermetic compressor constructed as described above will be described below.

Conventionally, since the interval between the inlet channel 27 and the outlet channel 29 is long, the time for which the refrigerant released in the muffler 26 stays is long, and the temperature of the refrigerant gas rises remarkably.
Therefore, the temperature of the inlet channel 27 itself was lower than the temperature of the outlet channel 29 itself. In the present embodiment, since the inlet channel 27 and the outlet channel 29 have an integrated structure, heat conduction from the outlet channel 29 to the inlet channel 27 occurs, and the temperature of the outlet channel 29 decreases.

As described above, the change in temperature due to the flow of the refrigerant gas in the muffler 26 is shown in FIG.
Explaining with reference to the refrigerant temperature characteristics of each part in 6, the temperature of the low-temperature refrigerant gas flowing from the inlet flow passage inlet 22 slightly increases while passing through the inlet flow passage 27.

Next, when flowing into the muffler 26 from the inlet passage opening 28, the refrigerant gas is retained in the muffler 26 because the inlet passage opening 28 and the outlet passage opening 30 are close to and opposed to each other. Time is reduced for close, non-competitive configurations. This suppresses the temperature rise of the refrigerant gas. Further, the inlet flow path opening 28 and the outlet flow path opening 30
The flow of the refrigerant up to this point becomes smooth, and the flow loss is reduced.

Further, the inlet channel 27 and the outlet channel 29
Since it is integrated in the muffler 26, the outlet flow path 29
The refrigerant gas led to the outlet passage opening 30 of the outlet passage 2
9, the temperature rise is suppressed.

Therefore, volume efficiency and efficiency can be improved by reducing the specific volume of the refrigerant gas.

As described above, the hermetic compressor according to the present embodiment is the same as the first embodiment, except that
And the outlet flow path opening 30 is configured to be close to and opposed to each other, and a smooth flow of the refrigerant gas is formed, so that the flow path loss is reduced and the temperature rise of the refrigerant is suppressed. , The volumetric efficiency and efficiency can be improved.

(Embodiment 3) FIG. 7 shows Embodiment 3 of the present invention.
1 is a front view of a hermetic compressor according to the present invention. FIG. 8 is a temperature characteristic diagram of the refrigerant gas in each part in the muffler of the embodiment.

In FIG. 7, reference numeral 31 denotes a muffler;
Reference numeral 2 denotes a partition plate that defines an opening space 34a of the inlet channel 33 and the outlet channel 34 in the muffler 31.

This embodiment is different from the first or second embodiment in that a partition plate 32 for narrowing the opening space 34a of the inlet channel 33 and the outlet channel 34 in the muffler 31 is provided.

The operation of the hermetic compressor constructed as described above will be described below.

Conventionally, since the interval between the inlet flow path 33 and the outlet flow path 34 is long, the time for which the refrigerant released in the muffler 31 stays becomes longer, and the temperature of the refrigerant gas rises remarkably.
Therefore, the temperature of the inlet channel 33 itself was lower than the temperature of the outlet channel 34 itself. In the present embodiment, since the inlet channel 33 and the outlet channel 34 have an integral structure, heat conduction from the outlet channel 34 to the inlet channel 33 occurs, and the temperature of the outlet channel 34 decreases.

The temperature change associated with the flow of the refrigerant gas in the muffler 31 will be described with reference to the temperature characteristics of the refrigerant in each part of the muffler shown in FIG. The gas flows into the inlet passage 33
The temperature rises slightly during the passage through.

Next, when flowing into the muffler 31 from the inlet passage opening 23, the inlet passage opening 23 and the outlet passage opening 24 are close to each other, and further, the flow of the refrigerant is blocked outside the side surface of the inlet passage opening 23. Since the partition plate 32 is provided, the time during which the refrigerant gas stays in the muffler 31 is further reduced. This suppresses the temperature rise of the refrigerant gas. Further, the flow of the refrigerant from the inlet passage opening 23 to the outlet passage opening 24 becomes smooth, and the flow loss is reduced.

Since the inlet channel 33 and the outlet channel 34 are integrated in the muffler 31, the refrigerant gas guided to the outlet channel opening 24 of the outlet channel 34 is
During the passage, the temperature rise is suppressed.

Therefore, volume efficiency and efficiency can be improved by reducing the specific volume of the refrigerant gas.

The intermittent pressure pulsation generated when the refrigerant gas is sucked into the cylinder 4 propagates in the direction opposite to the flow path of the refrigerant gas.
By setting the internal volume to be defined, the effect of the resonance type silencer that can reduce a specific frequency range can be obtained, and the overall noise can be reduced while improving the volume efficiency and efficiency.

As described above, the hermetic-type compressor of the present embodiment has the following features.
Inlet channel 33 and outlet channel 34 in muffler 31
By providing the partition plate 32 so as to narrow the opening space 34a, the specific frequency band can be significantly reduced, and the overall noise can be further reduced.

In this embodiment, the inlet flow path 33
And the outlet flow channel 34 were close to each other.
A configuration may be added in which the outlet 3 and the outlet channel opening 24 are opposed to each other. By opposing, the temperature rise of the refrigerant is further suppressed, and the loss of the refrigerant flow path can be reduced.

In this embodiment, the partition plate 32
However, a plurality of partition plates may be installed in the muffler 31. With the plurality of partition plates 32, the effect of greatly reducing the plurality of specific frequencies can be obtained.

(Embodiment 4) FIG. 9 shows Embodiment 4 of the present invention.
1 is a front view of a hermetic compressor according to the present invention. FIG. 10 is a cross-sectional view of a main part of the hermetic compressor according to the embodiment of the present invention, taken along line CC in FIG. FIG. 11 is a cross-sectional view of a main part of the muffler of the hermetic compressor of the embodiment, taken along line DD in FIG. FIG. 12 is a temperature characteristic diagram of the refrigerant gas in each part in the muffler of the embodiment.

In FIG. 9, FIG. 10, FIG. 11, and FIG.
Reference numeral 35 denotes a muffler, and 36 is installed in the muffler 35. The muffler 36 is disposed outside an inlet flow path opening 39 and an outlet flow path opening 40 which are tip portions of an inlet flow path 37 and an outlet flow path 38. This is a partition plate that covers the entire circumference in a tubular shape.

In the present embodiment, the partition plate 36 defining the volume inside the muffler 35 is close to that of the first or second embodiment so as to cover the inlet passage opening 28 and the outlet passage opening 30 from the outside. It was installed.

The operation of the hermetic compressor constructed as described above will be described below.

Conventionally, since the interval between the inlet flow path 37 and the outlet flow path 38 is long, the time for which the refrigerant released in the muffler 35 stays is long, and the temperature of the refrigerant gas rises remarkably.
Therefore, the temperature of the inlet channel 37 itself was lower than the temperature of the outlet channel 38 itself. In the present embodiment, since the inlet channel 37 and the outlet channel 38 have an integral structure, heat is transferred from the outlet channel 38 to the inlet channel 37, and the temperature of the outlet channel 38 decreases.

The temperature change caused by the flow of the refrigerant gas in the muffler 35 is described in FIG.
Explaining with reference to the refrigerant temperature characteristics of the respective internal parts, the temperature of the low-temperature refrigerant gas flowing from the inlet flow passage inlet 22 slightly increases while passing through the inlet flow passage 37.

Next, when flowing into the muffler 35 from the inlet passage opening 39, the inlet passage opening 39 and the outlet passage opening 40 are close to and opposed to each other. Since the space surrounding the passage opening 40 has a double heat insulation structure by the partition plate 36, the temperature rise of the refrigerant gas is suppressed. Further, the inlet channel opening 39
Refrigerant flow from the outlet to the outlet passage opening 40 becomes smooth, and flow loss is reduced.

Further, the inlet channel 37 and the outlet channel 38
Since it is integrated in the muffler 35, the outlet flow path 38
The refrigerant gas guided to the outlet passage opening 40 of the outlet passage 3
8, the temperature rise is suppressed.

Therefore, the volume efficiency and the efficiency can be improved by reducing the specific volume of the refrigerant gas.

The intermittent pressure pulsation generated when the refrigerant gas is sucked into the cylinder 4 propagates in the direction opposite to the path in which the refrigerant gas flows.
By setting the volume inside the space, the effect of the resonance silencer that can reduce a specific frequency range can be obtained, and further, the reduction of the overall noise can be realized.

As described above, the hermetic-type compressor of the present embodiment is characterized in that the invention described in claim 4 is applied to claim 1 or claim 2.
Further, the muffler 35 further includes a partition plate 36 which covers a part or the entire periphery of the outside of the outlet flow path 38 and the inlet flow path 37 in the muffler 35, so that a smooth flow of the refrigerant gas is formed. Thus, the flow path loss is reduced. Further, due to the double heat insulation structure, the temperature rise of the refrigerant is suppressed, the specific volume of the refrigerant gas is reduced, and the volume efficiency and the efficiency can be improved.

In the present embodiment, the partition plate 36
Are arranged close to the outside of the inlet channel 37 and the outlet channel 38, but the partition plate 36 has the inlet channel 37 and the outlet channel 3
8 may be touched. Thereby, the temperature rise of the refrigerant gas in the muffler 35 is further suppressed, and the effect of improving the volumetric efficiency is obtained.

[0072]

As described above, the first aspect of the present invention comprises a motor unit, a sealed container containing a mechanical unit such as a cylinder, a valve plate, a muffler, and a suction pipe. An inlet channel has an inlet channel and an outlet channel. The inlet channel has an inlet channel inlet opening at one end into the closed container and an inlet channel opening at the other end opening in the muffler, and the outlet channel has one end. Has an inlet opening that opens into the muffler, and the other end has a suction portion that communicates with the suction hole of the valve plate, and at least a part of the inlet flow passage and the outlet flow passage are in contact with each other. The temperature rise of the refrigerant gas guided to the passage opening is suppressed while passing through the outlet passage. Therefore, the specific volume of the refrigerant gas decreases, which leads to an improvement in volume efficiency and efficiency.

The invention described in claim 2 is the same as that in claim 1.
In the invention described in (1), the inlet flow path opening and the outlet flow path opening are configured to be close to and opposed to each other, and a smooth flow of the refrigerant gas is formed, so that the flow path loss is reduced and the temperature of the refrigerant rises. Is suppressed. Furthermore, the refrigerant gas guided to the outlet flow passage opening in the muffler further suppresses the temperature rise while passing through the outlet flow passage, so that the specific volume of the refrigerant gas decreases and the volume efficiency and efficiency are improved. Becomes possible.

The third aspect of the present invention is the first aspect of the present invention.
Alternatively, in the invention according to claim 2, by further providing a partition plate so as to narrow the opening space of the inlet flow path and the outlet flow path in the muffler, a smooth flow of the refrigerant gas is formed, and flow path loss is reduced. You. Further, the rise in the temperature of the refrigerant is suppressed, and the volumetric efficiency and efficiency can be improved. In addition, a specific frequency band can be significantly reduced, and ultimately the overall noise can be reduced.

The invention described in claim 4 is the first invention.
Alternatively, in the invention according to claim 2, a partition plate that covers a part or the entire circumference of the outlet channel and the inlet channel is provided inside the muffler, and a smooth flow of the refrigerant gas is formed. Thus, the flow path loss is reduced. In addition, it is possible to suppress a rise in the temperature of the refrigerant, reduce the specific volume of the refrigerant gas, and improve the volumetric efficiency and efficiency. In addition, a specific frequency band can be significantly reduced, and ultimately the overall noise can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of Embodiment 1 of a hermetic compressor according to the present invention.

FIG. 2 is a cross-sectional view of the hermetic compressor of the embodiment taken along line AA of FIG. 1;

FIG. 3 is a temperature characteristic diagram of a refrigerant gas in each part in the muffler of the embodiment.

FIG. 4 is a front view of Embodiment 2 of the hermetic compressor according to the present invention.

FIG. 5 is a cross-sectional view of the hermetic compressor of the embodiment, taken along line BB of FIG. 4;

FIG. 6 is a temperature characteristic diagram of a refrigerant gas in each part in the muffler of the embodiment.

FIG. 7 is a front view of Embodiment 3 of the hermetic compressor according to the present invention.

FIG. 8 is a temperature characteristic diagram of a refrigerant gas in each part in the muffler of the embodiment.

FIG. 9 is a front view of a hermetic compressor according to Embodiment 4 of the present invention.

FIG. 10 is a cross-sectional view of the hermetic compressor of FIG.
Cross-sectional view of main parts on line C

FIG. 11 is a cross-sectional view of a main part of the muffler of the hermetic compressor of the embodiment, taken along line DD in FIG.

FIG. 12 is a temperature characteristic diagram of a refrigerant gas in each part in the muffler of the embodiment.

FIG. 13 is a schematic longitudinal sectional view of a conventional hermetic compressor.

FIG. 14 is a sectional view of a main part of a cylinder head and a muffler of the hermetic compressor.

FIG. 15 is a schematic perspective view of a muffler component before assembly.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 2 Machine part 3 Motor part 4 Cylinder 6 Valve plate 9 Suction pipe 19 Muffler 20 Inlet flow path 21 Outlet flow path 22 Inlet flow path suction part 23 Inlet flow path opening 24 Outlet flow path opening 25 Suction part 26 Muffler 27 Inlet Channel 28 Inlet channel opening 29 Outlet channel 30 Outlet channel opening 31 Muffler 32 Partition plate 33 Inlet channel 34 Outlet channel 34a Open space 35 Muffler 36 Partition plate 37 Inlet channel 38 Outlet channel 39 Inlet channel opening 40 Outlet channel opening

Claims (4)

[Claims] 1. A motor unit, a hermetically sealed container containing a mechanical unit such as a cylinder, a valve plate, a muffler, and a suction pipe, wherein the muffler has an inlet flow path and an outlet flow path, The flow path has an inlet flow path suction part having one end opening in the closed container and an inlet flow path opening having the other end opening in the muffler, and the outlet flow path has an outlet flow opening one end in the muffler. A hermetic compressor characterized in that a passage opening and the other end have a suction portion communicating with a suction hole of the valve plate, and at least a part of the inlet flow passage and the outlet flow passage are in contact with each other. 2. The method according to claim 1, wherein an inlet passage opening of the inlet passage and an outlet passage opening of the outlet passage are close to and opposed to each other.
The hermetic compressor as described. 3. The hermetic compressor according to claim 1, further comprising a partition plate for narrowing an opening space of an inlet channel and an outlet channel in the muffler. 4. A partition plate which covers a part or the entire periphery of the muffler outside the inlet channel and the outlet channel.
Or the hermetic compressor according to claim 2.