JP2014240626A5 - - Google Patents

Description

Suction the intended shown in Patent Document 2, as shown in the Figure 1, is inserted into the suction port formed in a peripheral portion of the fixed scroll to suction write pipe, press-fitted inside the sheet Lumpur components of the suction pipe By rolling the pipe, the suction pipe is brought into close contact with the suction port to improve the sealing performance of the press-fitting portion.

That is, in the hermetic electric compressor shown in Patent Document 1, the tube at the distal end of suction pipes has a bonded structure has a configuration in which press-fitting portion of the tube to the suction port of the fixed scroll . For this reason, the production of the suction pipe is expensive because it is brazed in the furnace. Further, the intake gas to low temperature and low pressure flows through the suction pipes (refrigerant gas) is heated by high-temperature high-pressure gas discharged in the closed container, the volume of the suction gas is increased by the heating, that lowers the volumetric efficiency There was a problem.

Furthermore, the suction opening provided in the fixed scroll periphery of the compression mechanism, but by press-fitting the suction pipe, the engagement of the fixed scroll and the suction pipe, if not manufactured press-fit portion of its with high dimensional accuracy There is a problem that it cannot be brought into close contact, and it is difficult to make close contact due to the inclination during press-fitting and the like, and leakage tends to occur.

Intended in Patent Document 2, by press-fitting the sheet Lumpur parts inside of the intake write pipe, the suction pipe is brought into close contact with the suction port of the fixed scroll, the aim of leaks reduced by improving the sealing performance of the press section Yes. However, in this structure, since the connection part of the suction pipe to the fixed scroll suction port is press-fitted by the seal part, the inner diameter of the press-fitting part of the suction pipe is reduced by the seal part, and the step further Since it also becomes an attachment structure, the wall surface flow path loss of a suction pipe becomes large and there exists a subject which reduces compressor efficiency.

To achieve the above object, the hermetic electric compressor of the present invention comprises a closed container, a compression mechanism portion provided in the closed vessel for driving the compression mechanism section provided in the closed vessel an electric motor portion, by the outer pipe and a suction write pipe rather guide the refrigerant gas to the inlet, before Symbol suction pipe is crimped with the inner pipe on the outside of the inner pipe passes through the hermetic container the compression mechanism consists of a double-pipe structure, the outer pipe is characterized by a Young's modulus lower than the inner pipe.
Other features of the hermetic electric compressor of the present invention include a hermetic container, a compression mechanism provided in the hermetic container, and an electric motor part provided in the hermetic container for driving the compression mechanism. A suction pipe that penetrates the sealed container and guides the refrigerant gas to the suction port of the compression mechanism, and the suction pipe is configured by a double pipe structure including an inner pipe and an outer pipe that is crimped to the outside of the inner pipe. The inner pipe has a lower thermal conductivity than the outer pipe.

Claims (10)

A sealed container;
A compression mechanism portion provided in said sealed vessel,
An electric motor unit for driving the compression mechanism unit provided in the sealed container;
And a suction write pipe rather guide the refrigerant gas to the suction port of the compression mechanism through said closed container,
Before Symbol suction pipe is constituted by a double pipe structure by an outer pipe that is crimped with the inner pipe on the outside of the inner pipe,
The hermetic electric compressor, wherein the outer pipe has a Young's modulus lower than that of the inner pipe . A sealed container;
A compression mechanism provided in the sealed container;
An electric motor unit for driving the compression mechanism unit provided in the sealed container;
A suction pipe that penetrates the sealed container and guides the refrigerant gas to the suction port of the compression mechanism section;
The suction pipe is composed of a double pipe structure with an inner pipe and an outer pipe crimped to the outside of the inner pipe,
The inner pipe has a lower thermal conductivity than the outer pipe
A hermetic electric compressor characterized by that. A hermetic electric compressor according to claim 1 or 2, wherein the suction pipe, the inner pipe is of stainless steel, hermetic electric compressor in which the outer pipe and wherein the copper der Rukoto. 4. The hermetic electric compressor according to claim 3, wherein a copper suction inner pipe connected to a refrigeration cycle is connected to the suction pipe, and the suction pipe is fixed to the sealed container. The suction pipe, the suction inner pipe and the suction outer pipe are joined by brazing, and the brazed portion between the suction inner pipe and the suction pipe is formed by the inner pipe of the suction pipe. A hermetic electric compressor characterized in that the outer pipe made of copper and the suction inner pipe made of copper are brazed so as not to protrude from the end of the outer pipe . 5. The hermetic electric compressor according to claim 4 , wherein the brazing portion between the suction inner pipe and the suction pipe is chamfered on the inner diameter side of the end portion of the suction pipe so that the inner pipe is the outer A hermetic electric compressor characterized by being configured not to protrude from an end of a pipe. 5. The hermetic electric compressor according to claim 4 , wherein a brazing portion between the suction inner pipe and the suction pipe is configured such that an end portion of the inner pipe of the suction pipe is shorter than an end portion of the outer pipe. Thus, the hermetic electric compressor is configured such that the inner pipe does not protrude beyond the end of the outer pipe . 4. The hermetic electric compressor according to claim 3 , wherein a copper suction inner pipe connected to a refrigeration cycle is connected to the suction pipe, and the suction pipe is fixed to the sealed container. With a suction outer pipe
The suction pipe, the suction inner pipe, and the suction outer pipe are joined by brazing, and the brazed portion between the suction inner pipe and the suction pipe is a connection portion of the suction inner pipe to the suction pipe. The suction pipe is expanded larger than the outer diameter of the suction pipe, the suction pipe is inserted inside the connection portion, and the copper outer pipe outer peripheral surface of the suction pipe and the copper suction inner pipe are brazed. A hermetic electric compressor characterized by that. The hermetic electric compressor according to any one of claims 1 to 7 , wherein the compression mechanism portion of the suction pipe is configured to prevent a reverse flow of refrigerant gas from a compression chamber of the compression mechanism portion to the suction pipe side. A hermetic electric compressor comprising a check valve disposed so as to face a side end face, and chamfering the end face outer diameter side of the suction pipe facing the check valve . The hermetic electric compressor according to any one of claims 1 to 7 , wherein an inner surface of the suction pipe is formed straight over the entire length thereof . The hermetic electric compressor according to any one of claims 1 to 7, wherein the refrigerant gas is R32 or R744.