JPH11287183A - Closed type electric compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To damp transmitting pulsation while suppressing costs by drilling a hole at least one side of an intake connecting pipe and a communication element in a sealed container. SOLUTION: In a muffler 4 formed as a noise eliminating element, an inserting pipe 5 and a connecting tool 7 are arranged as a communicating element, and a hole 8 is drilled on an intake connecting pipe 6. Pulsation generated by a compression element 2 is transmitted from a muffler 4 into the inserting pipe 5, the connecting tool 7, and the intake connecting pipe 6, and is released in an sealed container 1 through the hole 8. It is thus possible to damp the pulsation, it is possible to reduce excitation force of a low pressure piping in a refrigerating cycle, and it is thus possible to reduce noise. Everywhere the hole can be drilled on a side surface part of the intake connecting pipe 6, and a releasing direction is can be set in any direction. Same effects are obtained in the case of the connecting tool 7, and in the case of the inserting pipe 5 as the communicating element.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic electric compressor connected to a refrigeration cycle of an electric refrigerator or the like and a technique for reducing noise in a refrigeration cycle low-pressure pipe.

[0002]

2. Description of the Related Art Conventionally, hermetic electric compressors are disclosed in
No. 44180 is known.

[0003] Fig. 11 shows the structure of a conventional hermetic electric compressor, in which 1 is a closed container, 2 is a compression element, and 3 is an electric element for driving the compression element 2. Reference numeral 4 denotes a muffler provided at the inlet of the compression element 2, reference numeral 5 denotes an insertion pipe connected to the muffler 4, and reference numeral 6 denotes a suction connection pipe communicating between the inside and outside of the sealed container 1. Reference numeral 7 denotes a connecting member that connects the insertion tube 5 and the suction connection tube 6.

[0004] In the compressor configured as described above,
The refrigerant returned from the refrigeration cycle passes through the suction connection pipe 6, the connection tool 7, the insertion pipe 5, and the muffler 4 and is transferred to the compression element 2.

[0005]

However, in the above-described conventional configuration, the pulsation generated by the compression element is transmitted through the silencer, the insertion pipe, the coupling, and the suction connection pipe without attenuating, and the system pipe is connected. There is a problem that the vibration may be caused and the noise may increase.

Further, in order to suppress the piping vibration of the system,
A countermeasure can be taken by attaching an anti-vibration device or the like to the attachment portion of the suction connection pipe outside the sealed container, but there is a problem that the cost increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to reduce transmitted pulsation, reduce the vibrating force of piping, and reduce noise while suppressing costs.

[0008]

According to the present invention, a hole is formed in at least one of the suction connection pipe and the communication element inside the closed container.

Thus, while suppressing the cost, the transmitted pulsation can be attenuated, the exciting force of the pipe can be reduced, and the noise can be reduced.

[0010]

The invention according to claim 1 of the present invention comprises a compression element and a motor-driven element for driving the compression element in a hermetically sealed container which is connected inside and outside by a suction connection pipe, and wherein the compression element is provided. A closed-type electric compressor having a muffler element at an inlet of the muffler, and a communication element connecting the muffler element and the suction connection pipe, wherein at least any one of the suction connection pipe and the communication element inside a closed container. One of which has a hole, the pulsation generated by the compression element,
During transmission through the silencing element, the communication element, and the suction connection pipe, the pulsation is released into the closed container through the hole, thereby attenuating the pulsation and reducing the noise. Further, in order to suppress the vibration of the piping of the system, processing can be performed at lower cost than a vibration isolator or the like attached to the suction-port connecting portion on the outside of the closed type container, and the function of reducing costs can be achieved.

According to a second aspect of the present invention, in the hermetic electric compressor according to the first aspect, the size of the hole is smaller than the inner diameter of the suction connection pipe or the communication element that forms the hole. While maintaining the strength of the piping, the pulsation generated by the compression element is transmitted through the silencing element, the communication element, and the suction connection pipe. And has the effect of reducing noise.

According to a third aspect of the present invention, in the hermetic electric compressor according to the first and second aspects, the holes have two or more of the same shape or different shapes, and are generated from the compression element. While the pulsation transmitted through the muffling element, the communication element, and the suction connection pipe, more pulsation was released into the closed container through the hole due to the large number of holes,
Attenuate larger pulsations, and regardless of the shape of the hole,
Has the effect of further reducing noise.

According to a fourth aspect of the present invention, in the hermetic electric compressor according to the first, second, and third aspects, the shape of the hole is a circle, an ellipse, a polygon, or a combination thereof. The pulsation generated by the compression element is transmitted through the silencing element, the communication element, and the suction connection pipe regardless of the shape. Then, the pulsation is released to the inside of the closed container through the hole, so that the pulsation is attenuated and the noise is reduced.

According to a fifth aspect of the present invention, in the hermetic electric compressor according to the first, second, third and fourth aspects, a hole opening is extended by a pipe to form a three-pronged shape. Pulsation generated by the compression element
During transmission through the silencing element, the communication element and the suction connection pipe, the pulsation is further attenuated by promoting the opening when the pulsation is opened through the hole to the inside of the closed container. This has the effect of avoiding the wind noise at the point of view and further reducing the noise.

According to a sixth aspect of the present invention, in the hermetic electric compressor according to the first, second, third, fourth, and fifth aspects, the holes are formed as through holes. It is easier to process than providing two different holes, and the pulsation generated by the compression element is transmitted through the muffling element, the communication element, and the suction connection pipe. By opening to the air, the pulsation is attenuated and the noise is reduced.

According to a seventh aspect of the present invention, in the hermetic electric compressor according to the first, second, third, fourth, fifth, and sixth aspects, the opening direction of the hole is defined. In the direction in which the pulsation is transmitted as the pulsation generated by the compression element is transmitted through the muffling element, the communication element, and the suction connection pipe. By easily opening the inside of the closed container through the hole, the pulsation is further attenuated and the noise is further reduced.

According to an eighth aspect of the present invention, there is provided a hermetic electric compressor according to the first, second, third, fourth, fifth, sixth and seventh aspects.
A winding spring is used in the communication element, and the pulsation generated by the compression element is transmitted through the silencing element, the communication element, and the suction connection pipe. By opening more inside the closed container by the action,
It has the effect of further attenuating pulsations and further reducing noise.

According to a ninth aspect of the present invention, there is provided a hermetic electric compression according to the first, second, third, fourth, fifth, sixth, seventh and eighth aspects. The machine has a condenser, a dryer, a capillary tube, and an evaporator, and has a refrigeration cycle using HFC or HC as a refrigerant, so that a low-noise refrigeration cycle can be provided.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same parts as those in the conventional example are denoted by the same reference numerals, and detailed description will be omitted.

(Embodiment 1) FIG. 1 is a sectional view of a hermetic electric compressor according to one embodiment of the present invention. A muffler 4 is provided as a muffling element, and an insertion tube 5 and a connecting member 7 are provided as communication elements. A hole 8 is formed in the suction connection tube 6.

With the above-described configuration, while the pulsation generated by the compression element 2 is transmitted through the muffler 4, the insertion pipe 5, the connecting member 7, and the suction connection pipe 6, the pulsation is generated by the hole 8
Pulsation is attenuated, the vibration force of the low-pressure pipe in the refrigeration cycle is reduced, and noise can be reduced.

It should be noted that the hole may be drilled at any position on the side surface of the suction connection pipe 6 inside the closed container 1,
It goes without saying that the same effect can be obtained regardless of the release direction.

It is needless to say that the same effect can be obtained when only the connecting member 7 is used as the communication element.

(Embodiment 2) FIG. 2 is a sectional view of a hermetic electric compressor according to an embodiment of the present invention. A silencer 4 is provided as a muffling element, and an insertion tube 5 and a connecting member 7 are provided as communication elements, and a hole 8 is formed in the insertion tube 5.

With the above-described configuration, while the pulsation generated by the compression element 2 is transmitted through the muffler 4, the insertion pipe 5, the coupling tool 7, and the suction connection pipe 6, the pulsation is generated by the hole 8
Pulsation is attenuated, the vibration force of the low-pressure pipe in the refrigeration cycle is reduced, and noise can be reduced.

It is needless to say that the same effect can be obtained regardless of the position where the hole is formed as long as it is on the side surface of the insertion tube 5 and the release direction is any direction.

(Embodiment 3) FIG. 3 is a sectional view of a hermetic electric compressor according to one embodiment of the present invention. A muffler 4 is provided as a muffling element, and an insertion tube 5 and a connecting member 7 are provided as communication elements. Reference numeral 9 denotes an inner diameter line of the suction connection pipe 6. The size of the hole 8 is smaller than the width of the inner diameter wire 9 in order to maintain the strength of the suction connection pipe 6.

With the above-described configuration, while the pulsation generated by the compression element 2 is transmitted through the muffler 4, the insertion pipe 5, the connecting member 7, and the suction connection pipe 6, the pulsation is generated by the hole 8
By releasing through the inside of the closed container 1, the pulsation is attenuated, the excitation force of the low-pressure pipe in the refrigeration cycle is reduced, and the noise can be reduced while maintaining the strength of the suction connection pipe 6.

(Embodiment 4) FIG. 4 is a sectional view of a hermetic electric compressor according to a fourth embodiment of the present invention. A muffler 4 is provided as a muffling element, and an insertion tube 5 and a connecting member 7 are provided as communication elements. Reference numeral 6 denotes a suction connection pipe, 7 denotes an insertion pipe, and two holes 8 are formed.

With the above configuration, the pulsation generated by the compression element 2 is transmitted through the muffler 4, the insertion pipe 5, the connection pipe 7, and the suction connection pipe 6, so that the number of holes is large. By releasing more pulsation into the closed container 1 through the two holes 8, larger pulsation is attenuated, the excitation force of the low-pressure pipe in the refrigeration cycle is further reduced, and noise can be further reduced. .

Needless to say, even if the number of holes is further increased, the same effect can be obtained.

(Embodiment 5) FIG. 5 is a sectional view of a hermetic electric compressor according to a fourth embodiment of the present invention. A muffler 4 is provided as a muffling element, and an insertion tube 5 and a connecting member 7 are provided as communication elements. Reference numeral 10 denotes an elliptical hole formed in the suction connection pipe 6. The elliptical hole 10 does not take into account the accuracy of forming the hole, does not need to be a true ellipse, and is very easy to process.

With the above-described configuration, while the pulsation generated by the compression element 2 is transmitted through the muffler 4, the insertion tube 5, the connecting member 7, and the suction connection tube 6, the pulsation is elliptical. By opening the inside of the closed container 1 through the hole 10, pulsation is attenuated, the exciting force of the low-pressure pipe in the refrigeration cycle is reduced, and noise can be reduced.

It is needless to say that the same effect can be obtained regardless of the shape of the hole, even if the shape of the hole is a circle, an ellipse, a polygon, or a combination thereof.

(Embodiment 6) FIG. 6 is a sectional view of a hermetic electric compressor according to an embodiment of the present invention. A muffler 4 is provided as a muffling element, and an insertion tube 5 and a connecting tool 7 are provided as communication elements. Reference numeral 11 denotes a pipe welded to an opening of a hole 8 formed in the suction connection pipe 6, and one end of the pipe 11 is opened in the closed vessel 1, and the other is opened in the suction connection pipe 6. ing.

With the above-described configuration, while the pulsation generated by the compression element 2 is transmitted through the muffler 4, the insertion pipe 5, the connecting tool 7, and the suction connection pipe 6, the pulsation is generated by the hole 8
By opening the inside of the closed container 1 through the pipe 11 welded to the refrigeration cycle, the opening is promoted, the pulsation is further attenuated, the exciting force of the low-pressure pipe in the refrigeration cycle is reduced, and the noise can be reduced. In addition, wind noise near the hole can be avoided, and noise can be further reduced.

It is needless to say that a similar effect can be obtained even if the suction connection pipe 6 and the pipe 11 are formed in a T-bend shape integrally.

(Embodiment 7) FIG. 7 is a sectional view of a hermetic electric compressor according to one embodiment of the present invention. A muffler 4 is provided as a muffling element, and an insertion tube 5 and a connecting member 7 are provided as communication elements. Reference numeral 12 denotes a through hole formed in the suction connection pipe 6.

According to the above-described configuration, when two or more holes are formed, it is easier to form through holes, and the pulsation generated by the compression element 2 causes the muffler 4, the insertion pipe 5, The pulsation is transmitted through the through-hole 12 while passing through the connecting member 7 and the suction connection pipe 6.
By opening it inside, pulsation can be attenuated, the exciting force of the low-pressure pipe in the refrigeration cycle can be reduced, and noise can be reduced.

(Embodiment 8) FIG. 8 is a sectional view of a hermetic electric compressor according to one embodiment of the present invention. A muffler 4 is provided as a muffling element, and an insertion tube 5 and a connecting member 7 are provided as communication elements. The hole 8 is opened in the suction connection pipe 6, and is provided so as to be opened in the same direction as the pulsation transmission direction while the pulsation is transmitted.

With the above-described configuration, while the pulsation generated by the compression element 2 is transmitted through the muffler 4, the insertion pipe 5, the connecting member 7, and the suction connection pipe 6, the pulsation transmission direction and By providing the hole 8 so as to be opened in the same direction,
The pulsation is easily released, and the pulsation is attenuated to a greater extent, and the noise is further reduced.

(Embodiment 9) FIG. 9 is a sectional view of a hermetic electric compressor according to one embodiment of the present invention. A muffler 4 is provided as a muffling element, and an insertion tube 5 and a winding spring 13 are provided as communication elements.
And the suction connection pipe 6 is prosperous.

With the above-described configuration, the pulsation generated by the compression element 2 causes the muffler 4, the insertion tube 5, the winding spring 13,
While the pulsation is transmitted through the suction connection pipe 6, the pulsation is more synergistically released into the closed container 1 through the gap and the hole 8 of the helical spring 13 to greatly attenuate the pulsation.
The vibration force of the low-pressure pipe in the refrigeration cycle can be further reduced, and the noise can be further reduced. In addition, the elasticity of the winding spring itself suppresses the transmission of vibration of the tube.

(Embodiment 10) FIG. 10 is a refrigeration cycle diagram of a refrigeration apparatus according to an embodiment of the present invention. In FIG. 10, reference numeral 01 denotes a hermetic electric compressor shown in the first to ninth embodiments.
And connected to the evaporator 02 by the suction connection pipe 6. Reference numeral 03 denotes a capillary tube, and reference numeral 06 denotes a drier, which is sequentially connected in a ring shape as shown in the figure to constitute a known refrigeration cycle.

Further, a refrigeration cycle using HFC or HC as a refrigerant is constituted.

[0046]

As is apparent from the above embodiment, according to the first aspect of the present invention, at least one or more holes are formed in at least one of the suction connection pipe and the communication element inside the closed container. With the provision, the pulsation generated by the compression element is transmitted through the muffling element, the communication element, and the suction connection pipe. In addition, the advantageous effect that the exciting force of the low-pressure pipe in the refrigeration cycle can be reduced and noise can be reduced can be obtained.

According to the second aspect of the present invention, since the size of the hole is made smaller than the inner diameter of the suction connection pipe or the communication element that makes the hole, the pulsation is opened to the inside of the closed container through the hole. Thereby, while maintaining the strength of the suction connection pipe, the pulsation is attenuated, the exciting force of the low-pressure pipe in the refrigeration cycle is reduced, and the advantageous effect that noise can be reduced can be obtained.

According to the third aspect of the present invention, since two or more holes having the same shape or different shapes are provided, more pulsations are provided to the inside of the closed container through the two holes because of the larger number of holes. By opening it, greater pulsation is attenuated, and regardless of the shape of the hole, the advantageous effect is obtained that the exciting force of the low-pressure pipe in the refrigeration cycle can be further reduced and noise can be further reduced. Can be

According to the fourth aspect of the present invention, since the shape of the hole is a circle, an ellipse, a polygon, or a combination thereof, it is not necessary to increase the accuracy of forming the hole shape in the processing. Regardless of the shape, the pulsation generated by the compression element is released through the hole into the inside of the closed vessel to attenuate the pulsation, reduce the exciting force of the low-pressure pipe in the refrigeration cycle, and reduce noise. The advantageous effect described above can be obtained.

According to the fifth aspect of the present invention, when the pulsation is released into the closed container through the pipe welded to the hole, the hole opening is extended with a pipe to form a three-pronged shape. By promoting the opening, the pulsation is further attenuated, the excitation force of the low pressure pipe in the refrigeration cycle is reduced, the noise can be reduced, and further, the wind noise near the hole can be avoided, An advantageous effect that noise can be further reduced can be obtained.

According to the sixth aspect of the present invention, by forming the holes as through holes, the processing is facilitated in processing two or more holes, and the pulsation is released into the closed container through the through holes. This has the advantageous effect of attenuating the pulsation, reducing the exciting force of the low-pressure pipe in the refrigeration cycle, and reducing noise.

According to the seventh aspect of the present invention, the direction in which the holes are opened coincides with the direction of pulsation transmission.
By making it easier for the pulsation to open through the hole to the inside of the closed container, the pulsation is more greatly attenuated, and the advantageous effect that the noise can be further reduced can be obtained.

According to the eighth aspect of the present invention, by using a winding spring in the communication element, the pulsation is opened to the inside of the closed container through the gap and the hole of the winding spring, so that their synergistic action is achieved. The pulsation is greatly attenuated, the vibration force of the low-pressure pipe in the refrigeration cycle is further reduced, and the noise can be further reduced. In addition, the elasticity of the winding spring itself suppresses the transmission of vibration of the pipe. The effect can be obtained.

According to a ninth aspect of the present invention, there is provided the hermetic electric compressor according to any one of the first to eighth aspects, comprising a condenser, a dryer, a capillary tube, and an evaporator. And a refrigeration cycle using HFC or HC as a refrigerant.

Therefore, low noise can be obtained in a refrigeration cycle using HFC or HC as the refrigerant.

[Brief description of the drawings]

FIG. 1 is a sectional view of a hermetic electric compressor according to a first embodiment of the present invention described in claim 1;

FIG. 2 is a sectional view of a hermetic electric compressor according to a second embodiment of the present invention described in claim 1;

FIG. 3 is a sectional view of a hermetic electric compressor according to a third embodiment of the present invention described in claim 2;

FIG. 4 is a sectional view of a hermetic electric compressor according to a fourth embodiment of the present invention described in claim 3;

FIG. 5 is a sectional view of a hermetic electric compressor according to a fifth embodiment of the present invention described in claim 4;

FIG. 6 is a sectional view of a hermetic electric compressor according to a sixth embodiment of the present invention.

FIG. 7 is a sectional view of a hermetic electric compressor according to a seventh embodiment of the present invention described in claim 6;

FIG. 8 is a sectional view of a hermetic electric compressor according to an eighth embodiment of the present invention described in claim 7;

FIG. 9 is a sectional view of a hermetic electric compressor according to a ninth embodiment of the present invention described in claim 8;

FIG. 10 is a refrigeration cycle diagram of a refrigeration apparatus showing a tenth embodiment of the present invention described in claim 9.

FIG. 11 is a cross-sectional view of a conventional hermetic electric compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 2 Compression element 3 Electric element 4 Silencer 5 Insertion pipe 6 Suction connection pipe 7 Connector 8 Hole 9 Inner diameter line of suction connection pipe 10 Oval hole 11 Tube 12 Through hole 13 Winding spring 01 Hermetic electric compressor 02 Evaporator 03 Capillary tube 04 Condenser 05 Discharge tube 06 Dryer

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Manabu Motegi 4-5-2-5 Takaidahondori, Higashiosaka-shi, Osaka Matsushita Refrigeration Co., Ltd.

Claims (9)

[Claims] 1. A compression container, an electric element for driving the compression element, and a muffling element at a suction-side inlet of the compression element, wherein the muffler element is provided in an airtight container whose inside and outside are communicated by a suction connection pipe. A hermetic electric compressor having a communication element for connecting to the suction connection pipe, wherein at least one of the suction connection pipe and the communication element inside a closed container is provided with at least one or more holes. A closed electric compressor. 2. The hermetic electric compressor according to claim 1, wherein the opening size of the hole is set to be equal to or less than the inner diameter of the suction connection pipe or the communication element for opening the hole. 3. The hermetic electric compressor according to claim 1, wherein the hermetic electric compressor has two or more holes having the same shape or different shapes. 4. The hermetic electric compressor according to claim 1, wherein the shape of the hole is a circle, an ellipse, a polygon, or a combination thereof. 5. The hermetic electric compressor according to claim 1, wherein the hole opening is extended by a pipe to form a three-pronged shape. 6. The hermetic electric compressor according to claim 1, wherein the hole is a through hole. 7. The hermetic electric compressor according to claim 1, wherein a direction in which the holes are opened coincides with a direction in which the pulsation is transmitted. 8. The hermetic electric compressor according to claim 1, wherein a winding spring is used in the communication element. 9. The method according to claim 1, further comprising a condenser, a dryer, a capillary, and an evaporator, wherein the condenser is connected to a refrigeration cycle using HFC or HC as a refrigerant. Hermetic electric compressor.