EP3467308A1

EP3467308A1 - Hermetic type compressor

Info

Publication number: EP3467308A1
Application number: EP18196173.1A
Authority: EP
Inventors: Hajime Sato; Yogo Takasu; Youhei Hotta; Masahiro Taniguchi; Yoshiki Kobayashi
Original assignee: Mitsubishi Heavy Industries Thermal Systems Ltd
Current assignee: Mitsubishi Heavy Industries Thermal Systems Ltd
Priority date: 2017-10-05
Filing date: 2018-09-24
Publication date: 2019-04-10
Also published as: JP6987591B2; JP2019065822A

Abstract

An object of the present invention is to enable relatively easy mounting preparation of a connecting terminal, and reduce interference with various components disposed in a housing while reducing thermal effect generated in a connecting terminal in assembly. A hermetic type compressor 1 includes a body housing 2 that has a cylindrical shape, and houses an electric motor 4 therein; an oil tank 10 having a space different from the body housing 2, a hermetic terminal 14 that is fixed to the oil tank 10, and is electrically connectable to an outside of the oil tank 10; and an electric cable 13 that is coupled with the hermetic terminal 14 and the electric motor 4, and electrically connects the hermetic terminal 14 and the electric motor 4, wherein the electric cable 13 is disposed inside the oil tank 10, inside the body housing 2, and inside a pipe 12 that connects the body housing 2 and the oil tank 10.

Description

[Technical Field]

The present invention relates to a hermetic type compressor.

[Background Art]

A compressor installed in an air conditioning apparatus or a refrigerating cycle of a chiller, for example, a hermetic type compressor installed in an outdoor unit has a cylindrical housing, and a compression mechanism, an electric motor, a crank shaft, and the like are housed in a housing.
A connecting terminal (for example, a hermetic terminal) is installed to penetrate through the housing. A power cable to which power from an external power supply is supplied is connected to the connecting terminal, and power is supplied to the electric motor in the housing through the power cable disposed in the housing.
The following PTL 1 discloses a technology of installing three hermetic terminals having three conductive pins in an airtight container, in a hermetic type electric compressor.

[Citation List]

[Patent Literature]

[PTL 1] Japanese Unexamined Patent Application, Publication

[Summary of Invention]

[Technical Problem]

Conventionally, in a case where a connecting terminal is installed in an outer peripheral surface of a housing, a connecting terminal is fixed to a cylindrical housing by welding, and therefore an inner peripheral surface of the housing is worked in a planar shape. Additionally, an electrode connected to the connecting terminal abuts on the outer peripheral surface of the housing, and therefore the outer peripheral surface of the housing is worked in the planar shape. In order to work the inner and outer peripheral surfaces of the housing in the planar shape, cutting work or sheet metal work is performed. However, cutting work to a cylindrical surface is difficult, and much time and labor for preparing mounting of the connecting terminal are required.
Glass as an insulating material is built in the connecting terminal, and there is a possibility that the glass inside the connecting terminal is damaged by being affected by shrinkage fitting when a motor stator or a bearing case is incorporated in the housing, or heat generated at the time of welding of the connecting terminal to the housing.
Further, the shape of the connecting terminal or the shapes of the various components are restricted such that a side, close to the inside of the housing, of the connecting terminal does not interfere with various components disposed in the housing, or the total height of the compressor needs to be increased by adjustment of the arrangement position of the connecting terminal or the various components.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a hermetic type compressor capable of relatively easily preparing mounting of a connecting terminal, and capable of reducing interference with various components disposed in a housing, while reducing thermal effect generated in the connecting terminal in assembly.

[Solution to Problem]

A hermetic type compressor according to an aspect of the present invention includes: a first housing that has a cylindrical shape, and houses a component for a compressor therein; a second housing having a space different from the first housing; a connecting terminal that is fixed to the second housing, and is electrically connectable to an outside of the second housing; and an electric cable that is coupled with the connecting terminal and the component for a compressor, and electrically connects the connecting terminal and the component for a compressor, wherein the electric cable is disposed inside the second housing, inside the first housing, and inside a connecting part that connects the first housing and the second housing.
According to this configuration, the connecting terminal is not fixed to the first housing, but is fixed to the second housing having the space different from the first housing. The electric cable that electrically connects the connecting terminal connected to the second housing, and the component for a compressor housed in the first housing is disposed inside the second housing, inside the first housing, and inside the connecting part that connects the first housing and the second housing. Therefore, different from a conventional technology, the connecting terminal is not fixed to the first housing, and therefore inner and outer peripheral surfaces of the first housing each are not required to be worked in a planar shape. Additionally, the connecting terminal is fixed to the second housing, and is not fixed to the first housing by welding, and therefore the connecting terminal is not affected by heat generated in shrinkage fitting when a motor stator or a bearing case is incorporated in the first housing, or in welding. Furthermore, the connecting terminal does not interfere with various components disposed inside the first housing, and therefore by the connecting terminal, the shapes of the various components are not restricted, and arrangement positions of the various components are not required to be adjusted. Therefore, it may be possible to reduce the total height of the compressor.
In the above aspect, the second housing may be provided apart from the first housing, and the connecting part may be a pipe that connects the first housing and the second housing.
According to this configuration, the electric cable is disposed inside the pipe that connects the first housing and the second housing. The second housing provided apart from the first housing is, for example, an accumulator, an oil tank, an oil separator, or the like. Additionally, the second housing may be an exclusive container for fixing the connecting terminal.
In the above aspect, a pressure atmosphere inside the first housing and a pressure atmosphere inside the second housing may be substantially the same.
According to this configuration, the electric cable that is disposed inside the pipe which connects the first housing and the second housing can be a continuous simple wire without using a hermetic terminal or the like.
In the above aspect, the electric cable may have a first electric cable disposed inside the first housing, a second electric cable disposed inside the second housing, and a connector that connects the first electric cable and the second electric cable.
According to this configuration, in a case where the second housing side is assembled separately from the first housing, the second electric cable disposed inside the second housing, and the first electric cable disposed inside the first housing can be connected by the connector, and assembly of the hermetic type compressor is facilitated.
In the above aspect, the hermetic type compressor may further include: a suction pipe that is connected to the first housing, and supplies a refrigerant into the first housing; and a bypass pipe that is branched from a middle of the suction pipe to allow the refrigerant to circulate, and is connected to the second housing.
According to this configuration, the refrigerant is supplied into the first housing through the suction pipe connected to the first housing. Additionally, the refrigerant circulates from the suction pipe to the second housing through the bypass pipe branched from the middle of the suction pipe to be connected to the second housing. Consequently, the refrigerant is unlikely to be stagnated in the second housing, and it is possible to prevent temperature rise of the connecting terminal provided in the second housing.
In the above aspect, in the bypass pipe or the second housing, a foreign matter removing part that removes a foreign matter contained in the refrigerant may be provided.
According to this configuration, the foreign matter contained in the refrigerant that circulates from the suction pipe to the second housing through the bypass pipe is removed by the foreign matter removing part provided in the bypass pipe or the second housing.
In the above aspect, the second housing may be provided above the first housing, the first housing and the second housing may be partitioned by a partition wall, and the connecting part may be the partition wall.
According to this configuration, the electric cable is disposed inside the partition wall that partitions the first housing and the second housing. In the electric cable, for example, an electric cable inside the first housing, and an electric cable inside the second housing are connected through another connecting terminal different from the connecting terminal and provided in the partition wall.

[Advantageous Effects of Invention]

According to the present invention, it is possible to relatively easily prepare mounting of a connecting terminal, and reduce interference with various components disposed in a housing, while reducing thermal effect generated in the connecting terminal in assembly.

[Brief Description of Drawings]

[Fig. 1] Fig 1 is a longitudinal sectional view illustrating a hermetic type compressor according to a first embodiment of the present invention.
[Fig. 2] Fig. 2 is a longitudinal sectional view illustrating a first modification of the hermetic type compressor according to the first embodiment of the present invention.
[Fig. 3] Fig. 3 is a longitudinal sectional view illustrating a second modification of the hermetic type compressor according to the first embodiment of the present invention.
[Fig. 4] Fig. 4 is a longitudinal sectional view illustrating a hermetic type compressor according to a second embodiment of the present invention.
[Fig. 5] Fig. 5 is a perspective view illustrating a container of the hermetic type compressor according to the second embodiment of the present invention.
[Fig. 6] Fig. 6 is a longitudinal sectional view illustrating a modification of the hermetic type compressor according to the second embodiment of the present invention.
[Fig. 7] Fig. 7 is a longitudinal sectional view illustrating a hermetic type compressor according to a third embodiment of the present invention.

[Description of Embodiments]

(First Embodiment)

Hereinafter, a first embodiment of the present invention will be described with reference to Fig. 1.
A hermetic type compressor (hereinafter referred to as a "compressor") 1 according to the first embodiment of the present invention is installed in, for example, an air conditioning apparatus or a refrigerating cycle of a chilling apparatus. The compressor 1 has a body housing 2, and an oil tank 10. Inside the body housing 2, a compression mechanism 3, an electric motor 4, a crank shaft 5, and the like are housed. The body housing 2 is an example of a first housing of the present invention, and has, for example, a cylindrical shape. The body housing 2 has a plate thickness and a structure capable of bearing internal refrigerant pressure.
The compression mechanism 3 is, for example, a scroll compression mechanism. The electric motor 4 is composed of a stator 6, and a rotor 7. The crank shaft 5 is integrally coupled with the compression mechanism 3 and the rotor 7, and turning force generated in the rotor 7 is transmitted to the compression mechanism 3 through the crank shaft 5.
In the compressor 1 according to this embodiment, the compression mechanism 3 is disposed above the electric motor 4. A suction pipe 8 is connected to a cylindrical outer peripheral surface of the body housing 2, and a discharge pipe 9 is connected to an upper surface of the body housing 2.
The oil tank 10 is composed of a cylindrical housing, and stores lubricating oil therein. The oil tank 10 is an example of a second housing of the present invention, and is provided apart from the body housing 2. The oil tank 10 is connected to a space of a low pressure atmosphere inside the body housing 2, the space being on an upstream side with respect to the compression mechanism 3 of the body housing 2 in a refrigerant flow, through a pipe 11 and a pipe 12. The pipe 11 connects a lower part of the oil tank 10 and a lower part of the body housing 2, and allows lubricating oil to circulate. The pipe 12 connects, for example, an upper part of the oil tank 10 and an intermediate part of the body housing 2, and enables circulation of a refrigerant. The oil tank 10 maintains the refrigerant in a low pressure atmosphere before the refrigerant is compressed by the compression mechanism 3, through the pipe 11 and the pipe 12.
The pipe 12 is an example of a connecting part of the present invention, and has an electric cable 13 disposed therein. The pipe 12 is, for example, a copper pipe, and is connected to the body housing 2 and the oil tank 10 by brazing. In a case of brazing, heat input at the time of pipe connection is smaller than heat input in a case of welding, and therefore it is possible to reduce thermal effect on a hermetic terminal (hereinafter referred to as a "terminal") 14, or distortion generated in the body housing 2 or the oil tank 10.
The electric motor 4 is an example of a component for a compressor of the present invention, and supplies power from an external power supply through the terminal 14 and the electric cable 13. The electric motor 4 is installed in a space of a low pressure atmosphere inside the body housing 2, the space being on an upstream side with respect to the compression mechanism 3 of the body housing 2 in the refrigerant flow.
In this embodiment, in an upper surface of the oil tank 10, the terminal 14 is installed. The upper surface of the oil tank 10 has a relatively smaller curvature than an outer peripheral surface having a cylindrical surface, and therefore is easily worked in a planar shape, and facilitates preparation for welding the terminal 14. Other components are not disposed in an internal space of the oil tank 10, and therefore the inside of the terminal 14 does not interfere with other components. The terminal 14 is an example of a connecting terminal of the present invention.
The electric cable 13 has a first end coupled with the terminal 14, and a second end coupled with the electric motor 4, and electrically connects the terminal 14 and the electric motor 4. An outer peripheral surface of the electric cable 13 may be covered with, for example, a film sleeve. The film sleeve is made of, for example, heat-resistant synthetic resin, or ceramics. Consequently, it is possible not only to secure electric insulation, but also to prevent a surface of the electric cable 13 from being damaged in assembly, or to prevent the electric cable 13 from being damaged by heat input in welding or in shrinkage fitting.
The electric cable 13 is disposed inside the oil tank 10, inside the pipe 12 that connects the oil tank 10 and the body housing 2, and inside the body housing 2. The electric cable 13 has a first electric cable 13A, a second electric cable 13B, and a connector 13C. The first electric cable 13A is disposed on the body housing 2 side, and at least a part of the first electric cable 13A is disposed inside the body housing 2. The second electric cable 13B is disposed on the oil tank 10 side, and at least a part of the second electric cable 13B is disposed inside the oil tank 10. The connector 13C connects the first electric cable 13A and the second electric cable 13B.
Consequently, in a case where the oil tank 10 side is assembled separately from the body housing 2, the second electric cable 13B disposed inside the oil tank 10, and the first electric cable 13A disposed inside the body housing 2 can be connected by the connector 13C, and assembly of the compressor 1 is facilitated. When assemblability of the compressor 1 is not considered, the electric cable 13 is not limited to the electric cable having the first electric cable 13A, the second electric cable 13B, and the connector 13C, but may be an electric cable with no connecting part such as a connector from the terminal 14 to the electric motor 4.
According to this embodiment, the terminal 14 is not fixed to the body housing 2, but is fixed to the oil tank 10 having another space different from the body housing 2. Therefore, different from a conventional technology, the terminal 14 is not fixed to the body housing 2, and therefore inner and outer peripheral surfaces of the body housing 2 each are not required to be worked in a planar shape. Accordingly, it is possible to reduce time and labor required for mounting preparation of the terminal 14.
The terminal 14 is fixed to the oil tank 10, and is not fixed to the body housing 2 by welding, and therefore the terminal 14 is not affected by heat generated in shrinkage fitting when the stator 6 or a bearing case (not illustrated) is incorporated in the body housing 2, or in welding. Accordingly, there is no risk that glass built in the terminal 14 as an insulator is damaged by thermal effect.
Furthermore, the terminal 14 does not interfere with various components disposed inside the body housing 2, and therefore by the effect of the terminal 14, the shapes of the various components are not restricted, and arrangement positions of the various components are not required to be adjusted. Therefore, the various components are suitably disposed inside the body housing 2, so that it may be possible to reduce the total height of the compressor 1.
A pressure atmosphere inside the body housing 2, a pressure atmosphere inside the oil tank 10, and a pressure atmosphere inside the pipe 12 are substantially the same, and therefore the electric cable 13 can be a continuous simple wire without using the hermetic terminal or the like.
In the above embodiment, the terminal 14 is installed in the oil tank 10 connected to the internal space on the low pressure side of the body housing 2. However, the present invention is not limited to this example. For example, the terminal 14 may be installed in an accumulator (not illustrated) connected to the internal space on the low pressure side of the body housing 2. In this case, a pipe that connects the body housing 2 and the accumulator is provided, and the electric cable 13 is disposed in this pipe.
In the above embodiment, the single compression mechanism 3 is provided in the body housing 2. However, the present invention is not limited to this example. As illustrated in Fig. 2, a compressor 1 is a multistage compressor, and a compression mechanism 3A on a low stage side, and a compression mechanism 3B on a high stage side may be installed in a body housing 2. In this case, an electric motor 4 is installed in a space of an intermediate pressure atmosphere inside the body housing 2, the space being on a downstream side with respect to the compression mechanism 3A on the low stage side of the body housing 2 and on an upstream side with respect to the compression mechanism 3B on the high stage side in a refrigerant flow.
In the body housing 2, an oil tank 15 is connected to a space of an intermediate pressure atmosphere inside the body housing 2. In this case, a terminal 14 is installed in the oil tank 15, and an electric cable 13 is disposed inside a pipe 16 that connects the body housing 2 and the oil tank 15.
Furthermore, the present invention is applicable to a case where a compressor 1 has a single rotary compression mechanism 3, and an electric motor 4 is installed in a space of a high pressure atmosphere inside a body housing 2, the space being on a downstream side with respect to the compression mechanism 3 of the body housing 2 in a refrigerant flow, as illustrated in Fig. 3. The compression mechanism 3 is disposed below the electric motor 4. In this case, in the body housing 2, an oil separator 17 is connected to the space of the high pressure atmosphere inside the body housing 2. Accordingly, a terminal 14 is installed in the oil separator 17, and an electric cable 13 is disposed in a pipe 18 that connects the body housing 2 and the oil separator 17.
In each of the above embodiment and modifications, the electric cable 13 is disposed in the pipe 12, 16, 18 different from the existing pipe 11 or discharge pipe 9 functionally connected to the body housing 2 and the oil tank 10, 15, the accumulator or the oil separator 17 of the compressor 1. However, the present invention is not limited to this example. That is, the electric cable 13 may be disposed in the existing pipe 11 or discharge pipe 9 functionally connected to the body housing 2, and the oil tank 10, 15, the accumulator or the oil separator 17 of the compressor 1 without separately installing the pipe 12, 16, 18. In this case, in consideration of a pressure loss by the electric cable 13, the diameter of the existing pipe 11 or discharge pipe 9 is preferably increased.

(Second Embodiment)

Now, a second embodiment of the present invention will be described with reference to Fig. 4 and Fig. 5. Hereinafter, detailed description of configurations and effects which are the same as configurations and the effects of the first embodiment will be omitted.
In the above first embodiment, the terminal 14 is installed in the oil tank 10, 15, the accumulator or the oil separator 17 which is installed along with the body housing 2 of the compressor 1, and has another function. However, the present invention is not limited to this example.
In this embodiment, an exclusive container 20 for fixing a terminal 14 is installed. The container 20 is an example of the second housing of the present invention, and is provided apart from a body housing 2. The container 20 is composed of a cylindrical housing. The container 20 includes, for example, two disks 20a, 20b facing each other, and a cylindrical part 20c having respective ends provided with the disks 20a, 20b, and the terminal 14 is installed in the disk 20a.
The container 20 is connected to a space of a low pressure atmosphere inside a body housing 2, the space being on an upstream side with respect to a compression mechanism 3 of the body housing 2 in a refrigerant flow, through a pipe 21. The pipe 21 connects the container 20 and an intermediate part of the body housing 2. The container 20 maintains a refrigerant in a low pressure atmosphere before the refrigerant is compressed by the compression mechanism 3, through the pipe 21.
The pipe 21 is an example of the connecting part of the present invention, and has an electric cable 13 disposed therein. The pipe 21 is, for example, a copper pipe, and is connected to the body housing 2 and the container 20 by brazing.
The electric cable 13 has a first end coupled with the terminal 14, and a second end coupled with the electric motor 4, and electrically connects the terminal 14 and the electric motor 4.
In this embodiment, in a case where only the pipe 21 is connected to the container 20, the refrigerant is supplied from the body housing 2 to the container 20, and thereafter is retained inside the container 20. Therefore, to the container 20, a bypass pipe 22 branched from the middle of a suction pipe 8 to allow the refrigerant to circulate may be connected.
In this case, the refrigerant circulates from the suction pipe 8 to the container 20 through the bypass pipe 22. Consequently, the terminal 14 is cooled by the refrigerant that circulates through the bypass pipe 22 and the container 20. Additionally, the refrigerant is unlikely to be stagnated in the container 20, and it is possible to prevent temperature rise of the terminal 14 provided in the container 20. A refrigerant amount to be supplied to the container 20 through the bypass pipe 22 may be part or all of a refrigerant to be sucked.
In a case where the refrigerant is supplied to the container 20 through the bypass pipe 22, a foreign matter removing part 23 that removes a foreign matter contained in the refrigerant may be provided in the bypass pipe 22 or the container 20. The foreign matter removing part 23 is, for example, a strainer or a filter. Consequently, metal powder and the like contained in the refrigerant enter in the vicinity of a pin on the inner side of the terminal 14, and it is possible to prevent a short-circuit caused by contact of the metal powder and the like with the pin.
The pipe 21 only needs to allow the container 20 to be connected to the space of the low pressure atmosphere inside the body housing 2. As illustrated in Fig. 4, the pipe 21 may be connected to the body housing 2 above the electric motor 4, or may be connected to the body housing 2 below the electric motor 4. As illustrated in Fig. 4 and Fig. 5, the pipe 21 may be linear, and plate surfaces of the disks 20a, 20b of the container 20 may disposed to be directed to the lateral sides, or as illustrated in Fig. 6, the pipe 21 may have a shape bent by, for example, 90°, and the plate surface of the disk 20a of the container 20 may be disposed to be directed downward, and the plate surface of the disk 20b may be disposed to be directed upward. Consequently, the container 20 can be prevented from becoming an obstacle in welding of the body housing 2 to the pipe, or in shrinkage fitting when the bearing case is incorporated. Additionally, it is possible to avoid interference with components disposed around the body housing 2.
According to this embodiment, the terminal 14 is not fixed to the body housing 2, but is fixed to the container 20 having another space different from the body housing 2. Therefore, also in this embodiment, similarly to the first embodiment, different from a conventional technology, the terminal 14 is not fixed to the body housing 2, and therefore inner and outer peripheral surfaces of the body housing 2 each are not required to be worked in a planar shape. Accordingly, it is possible to reduce time and labor required for mounting preparation of the terminal 14.
The terminal 14 is fixed to the container 20, and is not fixed to the body housing 2 by welding, and therefore the terminal 14 is not affected by heat generated in shrinkage fitting when the stator 6 or the bearing case (not illustrated) is incorporated in the body housing 2, or in welding. Accordingly, there is no risk that glass built in the terminal 14 as an insulator is damaged by thermal effect.
Furthermore, the terminal 14 does not interfere with various components disposed inside the body housing 2, and therefore by the effect of the terminal 14, the shapes of the various components are not restricted, and arrangement positions of the various components are not required to be adjusted. Therefore, the various components are suitably disposed inside the body housing 2, so that it may be possible to reduce the total height of the compressor 1.
In the above embodiment, the container 20 is connected to the space of the low pressure atmosphere of the body housing 2. However, the present invention is not limited to this example. The container 20 may be connected to a space of an intermediate pressure atmosphere, or a space of a high pressure atmosphere in accordance with the configuration of the compressor 1, similarly to the first embodiment.

(Third Embodiment)

Now, a third embodiment of the present invention will be described with reference to Fig. 7. Hereinafter, detailed description of configurations and effects which are the same as configurations and the effects of the first and second embodiments will be omitted.
In the first and second embodiments, the terminal 14 is installed in the housing (for example, the oil tank 10, 15, the accumulator or the oil separator 17, or the container 20) having substantially the same pressure atmosphere as the inside of the body housing 2 where the electric motor 4 is installed. However, the present invention is not limited to this example.
In this embodiment, a terminal 14 is installed in a space having a pressure atmosphere different from an internal space where an electric motor 4 is installed.
In a compressor 1 according to this embodiment, a body housing 30 has a low pressure side housing part 31 and a high pressure side housing part 32. The body housing 30 has a cylindrical shape, the low pressure side housing part 31 is located below the body housing 30, and the high pressure side housing part 32 is located above the body housing 30. The low pressure side housing part 31 is an example of the first housing of the present invention, and the high pressure side housing part 32 is an example of the second housing of the present invention.
Inside the low pressure side housing part 31, a compression mechanism 3 and the electric motor 4 are installed. The low pressure side housing part 31 and the high pressure side housing part 32 are partitioned by a discharge cover 34. The discharge cover 34 is an example of a partition wall of the present invention. A refrigerant compressed by the compression mechanism 3 is discharged to a space inside the high pressure side housing part 32 formed between the discharge cover 34 and the body housing 30, and thereafter is discharged from a discharge pipe 9 installed in an upper surface of the body housing 30.
A hermetic terminal (hereinafter referred to as a "terminal") 35 different from the terminal 14 is installed in the discharge cover 34. In this case, the discharge cover 34 is an example of a connecting part of the present invention.
In this embodiment, in the upper surface of the body housing 30, the terminal 14 is installed. The upper surface of the body housing 30 has a relatively smaller curvature than an outer peripheral surface having a cylindrical surface, and therefore is easily worked in a planar shape, and facilitates preparation for welding the terminal 14. Other components are not disposed in a space inside the high pressure side housing part 32 between the body housing 30 and the discharge cover 34, and therefore the inner side of the terminal 14 does not interfere with the other components.
An electric cable 36 has a first end coupled with the terminal 14, and a second end coupled with the electric motor 4, and electrically connects the terminal 14 and the electric motor 4.
The electric cable 36 is disposed inside the high pressure side housing part 32, inside the terminal 35 installed in the discharge cover 34, and inside the low pressure side housing part 31. The electric cable 36 has a first electric cable 36A, and a second electric cable 36B. A first electric cable 13A is disposed on the low pressure side housing part 31 side, and at least a part of the first electric cable 13A is disposed inside the low pressure side housing part 31. A second electric cable 13B is disposed on the high pressure side housing part 32 side, and at least a part of the second electric cable 13B is disposed inside the high pressure side housing part 32. The first electric cable 36A and the second electric cable 36B are connected to each other through the terminal 35.
According to this embodiment, the terminal 14 is not fixed to an outer peripheral surface of the body housing 30, but is fixed to an upper surface of the body housing 30. Therefore, different from a conventional technology, the terminal 14 is not fixed to the outer peripheral surface of the body housing 30, and therefore inner and outer peripheral surfaces of the body housing 30 each are not required to be worked in a planar shape. Accordingly, it is possible to reduce time and labor required for mounting preparation of the terminal 14.
The terminal 14 does not interfere with various components disposed inside the body housing 30, and therefore by the effect of the terminal 14, the shapes of the various components are not restricted, and arrangement positions of the various components are not required to be adjusted. Therefore, the various components are suitably disposed inside the body housing 30, so that it may be possible to reduce the total height of the compressor 1.
In each of the above first to third embodiments, an example of the electric cable and the connecting terminal (hermetic terminal) that supplies power to the electric motor. However, the present invention is not limited to this example. For example, the component for a compressor is not the electric motor 4, and may be electric and electronic components installed on a control board, and the electric cable may be a cable for control, and the connecting terminal may be a component for control.

[Reference Signs List]

1: hermetic type compressor (compressor)
2: body housing
3, 3A, 3B: compression mechanism
4: electric motor
5: crank shaft
6: stator
7: rotor
8: suction pipe
9: discharge pipe
10: oil tank
11, 12: pipe
13: electric cable
13A: first electric cable
13B: second electric cable
13C: connector
14: hermetic terminal (terminal)
15: oil tank
16: pipe
17: oil separator
18: pipe
20: container
21: pipe
22: bypass pipe
23: foreign matter removing part
30: body housing
31: low pressure side housing part
32: high pressure side housing part
34: discharge cover
35: hermetic terminal (terminal)
36: electric cable
36A: first electric cable
36B: second electric cable

Claims

A hermetic type compressor (1) comprising:
a first housing (2, 30) that has a cylindrical shape, and houses a component (4) for a compressor therein;

a second housing (20) having a space different from a space of the first housing (2, 30);

a connecting terminal (14) that is fixed to the second housing (20), and is electrically connectable to an outside of the second housing (20); and

an electric cable (13) that is coupled with the connecting terminal (14) and the component for a compressor, and electrically connects the connecting terminal (14) and the component (4) for a compressor, wherein

the electric cable (13) is disposed inside the second housing (20), inside the first housing (2, 30), and inside a connecting part that connects the first housing (2, 30) and the second housing (20).
The hermetic type compressor according to claim 1, wherein
the second housing (20) is provided apart from the first housing (2, 30), and
the connecting part is a pipe (21) that connects the first housing (2, 30) and the second housing (20).
The hermetic type compressor according to claim 2, wherein
a pressure atmosphere inside the first housing (2, 30) and a pressure atmosphere inside the second housing (20) are substantially the same.
The hermetic type compressor according to claim 2 or 3, wherein
the electric cable (13) has a first electric cable (13A) disposed inside the first housing (2, 30), a second electric cable (13B) disposed inside the second housing (20), and a connector (13C) that connects the first electric cable (13A) and the second electric cable (13B).
The hermetic type compressor according to any one of claims 2 to 4, further comprising:
a suction pipe (8) that is connected to the first housing (2, 30), and supplies a refrigerant into the first housing (2, 30); and

a bypass pipe (22) that is branched from a middle of the suction pipe (8) to allow the refrigerant to circulate, and is connected to the second housing (20).
The hermetic type compressor according to claim 5, wherein
in the bypass pipe (22) or the second housing (20), a foreign matter removing part that removes a foreign matter contained in the refrigerant is provided.
The hermetic type compressor according to claim 1, wherein
the second housing (20) is provided above the first housing (2, 30),
the first housing (2, 30) and the second housing (20) are partitioned by a partition wall, and
the connecting part is the partition wall (34).